CN107732578B - cable connector - Google Patents

Abstract

The invention discloses a cable connector, which comprises: at least two wires, each wire comprising a pair of differential signal lines and a ground line; and a connector including a housing, wherein a socket board is installed in the housing, and each of the wires is installed in the connector and electrically connected with the socket board by a differential signal line and a ground line, wherein the socket board has a butt portion and a wiring portion, an upper surface and a lower surface of the socket board are provided with a plurality of contact pads on the butt portion and a plurality of solder pads side by side on the wiring portion, and conductive traces connecting the contact pads and the solder pads, wherein the differential signal line and the ground line are respectively exposed from the cable and are respectively soldered to the solder pads on the upper surface and the lower surface of the wiring portion of the socket board, and a pair of differential signal lines of the wires on the upper surface and a pair of differential signal lines of the wires on the lower surface are misaligned in an arrangement direction of the differential signal lines and the ground lines.

Description

cable connector

technical field

The present invention relates to a cable connector, in particular to a cable connector with an improved wiring part.

Background technique

Numerous cable end structures and cable end treatment methods are known from the prior art, in particular for high-speed signal transmission, such as high-speed digital differential transmission, and cable end treatment methods. For example, Japanese Patent Application Laid-Open No. 10-223051 discloses a terminal treatment structure for shielded wires, in which the middle part of the shielded wire is bundled with a heat-shrinkable tube, and the end of the shielded wire can only be simply shielded and cannot maintain impedance. match. Japanese Patent Publication No. Sho 56-24447 discloses a method of forming an end portion of a coaxial cable, and discloses a method of matching characteristic impedance with a heat-shrinkable tube. In these conventional technologies, there is such a problem that the characteristic impedances of the exposed differential transmission signal lines do not match, and phenomena such as signal reflection and signal misalignment occur. In addition, the processing of the ends consumes a lot of man-hours and costs.

In order to solve the above problems, Chinese invention patent CN1222953C discloses a cable end structure, which at least has wires 21 and a connector plug board 22. The cable end structure can be seen from Figures 1a and 1b In an embodiment, a pair of differential signal wires 211 with an insulating sheath in a wire 21 is placed on one side of the plug board 22, that is, on the upper surface 221, and the ground wire 213 is placed on the other side, That is, on the lower surface 222 . Soldering pads 223 are provided on the upper surface 221, and soldering pads 224 are provided on the lower surface 222. The ground wire 213 and the differential signal wire 212 exposed by peeling off the outer skin of the front end portion 214 are respectively fixed to the soldering pads 223 by soldering. , 224 on. The position of the solder pads 224 on the lower surface of the plug-in board 22 is between the two solder pads 223 on the upper surface 221 . Here, for the convenience of description, only the connection portion of the differential signal line 212 of one wire 21 and the ground wire 213 is shown, but in fact, a plurality of differential signal lines 212 of the wires 21 may be provided on the upper surface 221 and the lower surface 222 and multiple connection parts of the ground wire 213 . Adjacent wires 21 are connected to the bonding pads in a state where the wires 21 are adjacent to each other with the same polarity (in-phase). In this embodiment, the adjacent differential signal lines 212 of the plurality of wires 21 are too close to each other.

The invention patent is also in a specific embodiment, and it is described in words that the wires 21 can also have other various configuration schemes. A pair of differential signal lines 212 and a ground line 213 in 21 are connected to them, this embodiment is shown schematically in Figure 1c. Here, the positive differential signal line 212 is marked with "+", the negative differential signal line 212 is marked with "-", and the ground wire 213 is marked with "G". Viewed from the arrangement direction R2, the arrangement order of the differential signal lines 212 and the ground lines 213 of the conductors 21 on the upper surface 221 is G,-,+,G,-,+,G,-,+,G,-,+ , the order of the differential signal lines 212 and the ground lines 213 of the conductors 21 on the lower surface 222 is also G,-,+,G,-,+,G,-,+,G,-,+, and at the same time, The signal lines of the same polarity of the upper and lower corresponding conductors 21 on the upper surface 221 and the lower surface 222 are located at the same corresponding position along the arrangement direction R2. Therefore, if both the upper and lower surfaces of the originally thin plug-in board 22 are wired, the upper and lower signal lines of the same polarity will be directly opposite each other. To further improve the transmission rate and reduce the crosstalk, the above-mentioned wiring method is not good. , at the same time need to find a better solution.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a cable connector, which achieves the purpose of reducing crosstalk and increasing transmission rate.

To achieve these and other advantages and in accordance with the objectives of the present invention, as embodied and generally described herein, a cable connector is proposed, comprising:

At least two wires, each wire includes a pair of differential signal wires and a ground wire;

A connector, the connector includes a housing, wherein a plug board is installed in the housing, the wires are installed in the connector, and the differential signal wire and the ground wire are connected with all the The plug-in boards are electrically connected together, wherein the plug-in board has a docking part and a wiring part, and the upper and lower surfaces of the plug-in board are provided with a plurality of contact pads on the docking part and on the The wiring portion is provided with a plurality of side-by-side solder pads, and is provided with conductive traces connecting these contact pads and the solder pads,

Wherein, the differential signal line and the ground line are exposed to the cable respectively and are respectively welded to the welding pads on the upper surface and the lower surface of the wiring portion of the plug board,

It is characterized in that, along the arrangement direction of the differential signal lines and the ground lines, a pair of differential signal lines of the conductors on the upper surface and a pair of differential signal lines of the conductors on the lower surface are misaligned.

According to one embodiment, the ground wires of the conductors on the upper surface and the ground wires of the lower conductors on the lower surface are located on opposite sides of their pair of differential signal lines, respectively.

According to an embodiment, along the arrangement direction of the differential signal lines and the ground lines, a pair of differential signal lines of the conductors on the upper surface and a pair of differential signal lines of the conductors on the lower surface are staggered A solder pad location.

According to an embodiment, along the arrangement direction of the differential signal lines and the ground lines, the arrangement order of the differential signal lines and the ground lines of the conductors on the upper surface is G,-,+,G,-, +, . . . The order of the differential signal lines and the ground lines of the conductors on the lower surface is -, +, G, -, +, G, . . .

According to one embodiment, the housing is a metal housing.

According to one embodiment, the housing has an upper housing and a lower housing.

According to one embodiment, the upper casing and/or the lower casing has a receiving portion for receiving the cable.

The beneficial technical effect of the present invention is that the pair of differential signal wires of the upper row of wires and the pair of differential signal wires of the lower row of wires are misaligned in the left-right direction, and the ground wires of the upper and lower wires are located in the The opposite sides of a pair of differential signal lines of the upper and lower conductors, so as to achieve the purpose of reducing crosstalk and increasing the transmission rate.

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

Description of drawings

The invention will be explained in detail below with reference to the drawings. In the attached image:

Fig. 1a shows the arrangement scheme of connecting the differential signal line on the soldering pad on one side of the plug board according to the prior art;

Figure 1b shows an arrangement of connecting the ground wire to the soldering pad on the other side of the plug-in board according to the prior art;

Fig. 1c shows the arrangement scheme of soldering pads according to the prior art and the arrangement of the differential signal line and the ground line of each wire;

Figure 2 shows an exploded perspective view of a cable connector according to the present invention;

Fig. 3 shows the arrangement scheme according to the present invention of the differential signal wire and the ground wire of the cable on the upper surface of the plug-in board in a perspective view;

FIG. 4 shows the arrangement according to the present invention of the differential signal line and the ground line of the cable on the lower surface of the plug-in board in a perspective view;

Fig. 5a shows the arrangement scheme of the differential signal wire and the ground wire on the plug-in board in a top view;

Figure 5b shows a cross-sectional view through line Z-Z in Figure 5a; and

Figure 6 shows an embodiment of a cable connector according to the invention in a perspective view.

List of reference numbers:

1 cable connector

11 Cable Harness

110 Cable

111 wires

112 Differential signal line

113 Ground wire

12 Connectors

121 Upper case

1211 Front end of upper casing

1212 Rear end of upper casing

122 Lower case

1221 Lower case front end

1222 Rear end of lower case

126 Lower case accommodating part

123 Pinboard

1231 Docking

1232 Contact pad

1233 Wiring Section

1234 Solder Pad

1235 Pinboard Surface

1236 Pinboard Bottom Surface

1237 Conductive Traces

124 screws

125 holes

13 Protective cover

21 wires

211 Differential Signal Cable with Insulated Cover

212 Differential signal line

213 Ground wire

214 Front end

22 plug-in board

221 upper surface

222 lower surface

223 Solder pad

224 Solder pads

R1 Arrangement direction of differential signal line 112 and ground line 113

R2 Arrangement direction of differential signal line 212 and ground line 213

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

While this invention is susceptible to many different forms of embodiment, several specific embodiments are shown in the drawings and will be described in detail herein, while it is to be understood that this description is to be considered as one example of the principles of the invention. examples, and are not intended to limit the invention to the drawings shown herein.

Likewise, reference to a feature or aspect is intended to describe a feature or aspect of an example of the invention, and does not imply that every embodiment thereof must have the stated feature or aspect. Furthermore, it should be noted that the specification shows a number of features. Although certain features have been combined to illustrate potential system designs, other combinations of features not expressly disclosed may also be used. Therefore, unless otherwise stated, the combinations are not intended to be limiting.

In the embodiments shown in the drawings, directional representations such as up, down, left, right, front and rear are not absolute, but relative, and are used to explain the structure and movement of various components in the present invention. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the positions of elements changes, it is believed that these representations will change accordingly.

Figure 2 shows an exploded perspective view of the cable connector 1 according to the invention. Here, the cable connector 1 includes a connector 12 and a cable bundle 11, the cable bundle includes 4 cables 110, the connector 12 includes a metal housing with a separate upper housing 121 and the lower case 122. The cable bundle 11 including the four cables 110 is inserted into the housing provided in the upper case 121 and the lower case 122 from between the rear end portion 1212 of the upper case 121 and the rear end portion 1222 of the lower case 122 Department. A clip-type receiving portion 126 is provided on the component at the rear end portion 1222 . A plug board 123 is inserted into and fixedly held in the corresponding receiving part in the front end 1221 of the lower case 122 , and the plug board 123 is arranged between the front end 1211 of the upper case 121 and the front end 1221 of the lower case 122 In order to form the plug part of the connector 12, and has a butt part 1231 for docking a plug device and a wiring part 1233 for electrical connection with the cable 110, the upper surface 1235 and the lower surface of the plug board 123 1236 A plurality of contact pads 1232 are provided on the abutment portion 1231 and a plurality of side-by-side solder pads 1234 are provided on the wire portion 1233, and there are conductive traces 1237 connecting these contact pads 1232 and solder pads 1234 (Figures 3 and 4). After the cables 110 of the cable bundle 11 are respectively connected to the plug plates 123 of the connector 12, the screws 124 are inserted into the corresponding holding portions in the lower housing 122 by passing the screws 124 through the holes 125 in the upper housing 121 and fixed, so that the upper casing 121 and the lower casing 122 are snapped together, so that they can be docked with the corresponding plug-in devices and used.

3 and 4 respectively show the arrangement according to the present invention of the differential signal line 112 and the ground line 113 of the conductor 111 on the upper surface 1235 and the lower surface 1236 of the plug board 123 in perspective views. As shown in FIG. 3 , a pair of differential signal wires 112 of one of the wires 111 are arranged side by side in the insulating wrapping portion inside the wire 111 , and the two differential signal wires 112 , ie, one is used to transmit a positive signal A ground wire 113 is arranged between the respective insulating sheaths of the positive signal wire and a negative signal wire for transmitting negative signals and the insulating wrapping portion of the wire 111 . On the side of the wires 111 facing the plug board 123 , the ends of the wires 111 facing the plug board 123 have a part of the insulating wrap removed so that a section of the differential signal respectively arranged in the wires 111 is exposed therefrom Line 112 and ground line 113, and then peel off a part of the insulation of the differential signal line 112, the differential signal line 112 and the ground line 113 from which the insulation is stripped are welded from the rear to the wiring part 1233 arranged on the plug board 123. On the solder pads 1234 on the upper surface 1235 so that electrical signals can be passed through the connector 12 and the cable bundle 11 . In this case, a pair of differential signal lines 112 in each lead wire 111 is directly soldered to the two soldering pads 1234 opposite to it in a side-by-side manner, and the ground line 123 is pulled and twisted from a corresponding one of the soldering pads 1234. The pair of differential signal lines 112 are pulled to one side of the pair of differential signal lines 112 against the arrangement direction R1 of the differential signal lines 112 and the ground line 113 and are soldered to the corresponding soldering pads 1234, that is, There is now a ground wire 113 each between pairs of differential signal wires 112 of those wires 111 that are soldered to the upper surface 1235 of the wiring portion 1233 of the plug-in board 123 . The figure also briefly shows that along the arrangement direction R1 of the differential signal lines 112 and the ground lines 113 , a pair of differential signal lines 112 of the conductors 111 on the upper surface 1235 and a pair of the conductors 111 below the lower surface 1236 The differential signal lines 112 are misaligned, ie they are not aligned up and down, thereby well avoiding signal crosstalk.

FIG. 4 shows a wiring diagram corresponding to FIG. 3 from the lower surface 1236 of the plug-in board 123 . The components in this figure are arranged substantially mirror-symmetrically with the components in FIG. 3 , and the main difference is that the ground wire 113 in the lower row of wires 111 is twisted from between a pair of differential signal wires 112 assigned to it by pulling and twisting. Along the arrangement direction R1 of the differential signal line 112 and the ground line 113, it is pulled to one side of the pair of differential signal lines 112 and soldered to the corresponding solder pads 1234, so that the upper row of wires 111 and approximately directly below The ground wires 113 of the lower row of wires 111 are respectively on the upper surface 1235 and the lower surface 1236 , which are respectively on the opposite sides of the upper and lower pairs of differential signal wires 112 .

With the above arrangement in FIGS. 3 and 4 , that is, the pair of differential signal lines 112 of the upper row of conductors 111 and the pair of differential signal lines 112 of the lower row of conductors 111 substantially directly below are displaced along the arrangement direction R1 , and the ground wires 113 of the upper and lower wires 111 are respectively located on the opposite sides of the pair of differential signal wires, thereby achieving the purpose of reducing crosstalk and increasing the transmission rate.

FIG. 5 a and FIG. 5 b show the arrangement scheme of the differential signal wire 112 and the ground wire 113 on the plug board 123 in a top view and a cross-sectional view. In FIG. 5a, the four wires 111 at the bottom of the figure, each comprising a pair of differential signal wires 112 and a ground wire 113, are connected to the plug-in board by soldering the ends of the differential signal wires 112 with the stripped insulation and the ground wire 113. 123 on the soldering pad 1234 of the wiring portion 1233 to transmit electrical signals. It can be seen from this that each ground wire 113 connected to the upper surface 1235 of the plug board 123 is soldered to the left side of the pair of differential signal wires 112 assigned thereto along the arrangement direction R1.

Fig. 5b is a sectional view through the line Z-Z in Fig. 5a, which corresponds to the view in Fig. 1c according to an embodiment of the prior art. From this figure, it can be clearly seen how the upper and lower rows of wires 111 are connected on the circuit board 123 , wherein the pair of differential signal wires 112 of the wires 111 on the upper surface 1235 and the wires 111 on the lower surface 1236 are connected to each other. A pair of differential signal lines 112 are staggered and roughly offset by one solder pad 1234, wherein the positive signal line 112 is marked "+", the negative signal line 112 is marked "-", and the ground line 113 is marked as "G". In this embodiment, the differential signal lines 112 and the ground lines 113 connected to the upper surface 1235 of the plug board 123 are arranged along the arrangement direction R1 as G,-,+,G,-,+,G,- ,+,G,-,+, and the order of the differential signal line 112 and the ground line 113 on the lower surface 1236 is -,+,G,-,+,G,-,+,G,-,+, G. Through this embodiment, a pair of differential signal wires 112 of the upper row of wires 111 and a pair of differential signal wires 112 of the lower row of wires 111 can be misaligned along the arrangement direction R1, and the ground of the upper and lower wires 111 The wires 113 are located on the opposite sides of the pair of differential signal wires 112 of the upper and lower wires 111 respectively, that is, the ground wire 113 of each wire 111 in the upper row is located on the left side of the pair of differential signal wires 112 of the wire 111 in the figure, The ground wire 113 of each wire 111 in the lower row is located on the right side in the figure of the pair of differential signal wires 112 of the wire 111 , so as to achieve the purpose of reducing crosstalk and improving the transmission rate of the present invention.

A perspective view of an embodiment of a cable connector 1 according to the invention is briefly shown in FIG. 6 . A cable bundle 11 comprising 4 cables 110 is inserted from the rear into a connector 12 which can have an external ribbed protective cover 13 of the connector 12 which can be connected to the cable When the connector 1 is not in use, it covers the plug portion of the connector 12 and protects the components in the connector 12, such as the plug plate 123, from damage. When the cable connector 1 is used, the protective cover 13 can be removed from the connector 12. Remove the connector 12 of the cable connector 1.

The foregoing embodiments and advantages are exemplary only and should not be considered as limitations of the present invention. The descriptions herein are intended to be exemplary, not to limit the scope of the claims. Numerous alternatives, modifications and modifications will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to yield additional and/or alternative exemplary embodiments.

Since the features of the present invention may be embodied in a variety of forms without departing from the characteristics of the invention, it should also be understood that the above-described embodiments are not limited to any of the details described above, unless otherwise noted, but rather broadly are to be construed as falling within the scope defined by the appended claims, therefore, all modifications and variations that come within the scope and limits of the claims, or equivalents to such scope and limits, are intended to be covered by the appended claims.

Claims (5)

1. A cable connector comprising: At least two wires, each wire includes a pair of differential signal wires and a ground wire; A connector, the connector includes a housing, wherein a plug board is installed in the housing, the wires are installed in the connector, and the differential signal wire and the ground wire are connected with all the The plug-in boards are electrically connected together, wherein the plug-in board has a docking part and a wiring part, and the upper and lower surfaces of the plug-in board are provided with a plurality of contact pads on the docking part and on the The wiring portion is provided with a plurality of side-by-side solder pads, and is provided with conductive traces connecting these contact pads and the solder pads, Wherein, the differential signal line and the ground line are exposed to the cable respectively and are respectively welded to the welding pads on the upper surface and the lower surface of the wiring portion of the plug board, It is characterized in that, along the arrangement direction of the differential signal line and the ground line, a pair of differential signal lines of the conductors on the upper surface and a pair of differential signal lines of the conductors on the lower surface are misaligned, wherein , along the arrangement direction of the differential signal line and the ground line, the arrangement order of the differential signal line and the ground line of each wire on the upper surface is G,-,+,G,-,+,..., so The order of the differential signal lines and the ground lines of the conductors on the lower surface is -,+,G,-,+,G,..., wherein, along the arrangement direction of the differential signal lines and the ground lines, the The negative signal line in the pair of differential signal lines of the conductors on the upper surface - and the positive signal line + respectively and the negative signal line in the pair of differential signal lines of the opposite conductors on the lower surface - and the positive Signal line + stagger the position of one solder pad. 2 . The cable connector according to claim 1 , wherein the ground wires of the conductors on the upper surface and the ground wires of the lower conductors on the lower surface are respectively located in their pair of differential signals. 3 . opposite side of the line. 3. The cable connector of claim 1 or 2, wherein the housing is a metal housing. 4. The cable connector of claim 3, wherein the housing has an upper housing and a lower housing. 5 . The cable connector according to claim 4 , wherein the upper casing and/or the lower casing has a receiving portion for receiving the cable. 6 .

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