CN113517587A

CN113517587A - RJ45 type communication connector with non-parallel reeds arranged

Info

Publication number: CN113517587A
Application number: CN202110527040.1A
Authority: CN
Inventors: 徐予宏; 冯岭; 赵呈峰; 周海霞
Original assignee: NANJING PUTIAN TELEGE INTELLIGENT BUILDING Ltd
Current assignee: NANJING PUTIAN TELEGE INTELLIGENT BUILDING Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-10-19

Abstract

The invention relates to a non-parallel reed arranged RJ45 type communication connector, which is characterized by comprising a connector shell, a plurality of connector contacts arranged on the connector shell, a PCB substrate with terminals for accommodating the connector contacts, a plurality of terminal contacts arranged on the PCB substrate, a terminal guide block which can ensure that the terminal contacts keep specific positions and are fixed, and a terminal block which is provided with a wiring bundling groove forming a certain angle with a transverse axis A-A of each terminal contact and keeping parallel. Wherein the end contact points are in each 2 groups and are complementarily parallel by taking the central symmetry axes x and y of the PCB substrate as the center. The present invention provides for reduced variability in the installation and termination of RJ 45-style communications connectors. Therefore, the technical dependence on operators is reduced, the performance of the whole wiring system is more stable, the design performance of the RJ45 type communication connector can be fully exerted, and the overall performance of the wiring system is improved.

Description

RJ45 type communication connector with non-parallel reeds arranged

Technical Field

The invention discloses an RJ45 type communication connector with non-parallel reeds, belonging to the technical field of comprehensive wiring.

Background

In the prior art, the communication connector implements the standards of IEEE 10GBASE-T, ISO/IEC 11801Ed2, IEC 60603-7-41, etc., and higher frequency characteristics and more controllable performance are required in communication applications. Thus making it particularly critical that the variability of installation and termination of the communications connector be reduced. Only with reduced variability in installation and termination can the communications connector be designed to perform adequately, thereby improving the performance of the overall wiring system.

Furthermore, the alignment of the termination contacts from one telecommunications connector to another can result in crosstalk between the individual telecommunications connectors, which is referred to as alien crosstalk. One preferred way to reduce or eliminate alien crosstalk is to increase the effective distance between the contact points of the communication connector. The uniform and compact arrangement of the internal termination contacts of the telecommunications connector thus makes it possible to take full advantage of the space utility of the telecommunications connector. Thereby allowing the communications connector to be more compact, establishing a high density configuration of 1U48 bits.

Disclosure of Invention

The invention provides an RJ45 type communication connector with non-parallel reed arrangement, and the main purpose of the invention is to achieve the reduction of the variability of the installation and termination of the RJ45 type communication connector by optimizing the arrangement of the internal termination contact and the substrate of the RJ45 type communication connector. Therefore, the technical dependence on operators is reduced, the performance of the whole wiring system is more stable, the design performance of the RJ45 type communication connector can be fully exerted, and the overall performance of the wiring system is improved.

The technical solution of the invention is as follows:

a non-parallel reed arranged RJ45 type communication connector comprises a connector housing 1, a plurality of connector contacts 2 mounted on the connector housing, a PCB substrate 3 having terminals for receiving the connector contacts, a plurality of terminal contacts 4 mounted on the PCB substrate 3, terminal guide blocks 5 for holding the terminal contacts in a specific position and fixed, terminal blocks 6 having bundling grooves at an angle to the transverse axis A-A of each terminal contact and held in parallel, said components being connected in series; the end contacts 4 are uniformly and symmetrically distributed in four quadrants by taking the central symmetry axes x and y of the PCB substrate 3 as the center for every 2 groups, and the transverse axis A-A of each group of end contacts 4 and the central symmetry axis x of the PCB substrate 3 form a first angle and a second angle, wherein the first angle is different from the second angle.

The connector contacts 2 are wire springs or flexible circuit material, the screen PCB substrate 3 establishes an electrical connection between the connector contacts 2 and the termination contacts 4, the connector housing 1 is conductive for printed trace printed circuit boards, and the termination guide 5 holds the termination contacts 4 in a particular position and fixed.

The screening PCB substrate 3 further comprises a compensation element for adjusting electrical properties.

The binding grooves of the termination block 6 are used for binding different wire pairs in the cable, such as blue, orange, green and brown wire pairs, and the wire pairs with different colors are respectively bound in corresponding binding grooves according to the colors marked on the termination block 6; the beam slot axis z forms two complementary angles, a third and a fourth, with the transverse axis a-a of each set of termination contacts 4; when the terminal block 6, to which the cable is bound, is pressed into the connector housing 1 in the direction designated by the terminal guide 5, the terminal contacts 4 may pierce the insulation of the respective wires to establish electrical connection between the terminal contacts 4 and the respective wire harnesses.

The angle of the transverse axis of the termination contacts 4 with respect to the reference axis x, y of the PCB substrate 3 is different between each plurality of termination contacts 4 and forms an angle for each pair of termination contacts 4; by adjusting the angle of the termination contacts, coupling, partial coupling or uncoupling is possible while reducing the negative effects of unbalanced coupling.

The invention has the beneficial effects that:

1. coupling (or decoupling) can be properly balanced by adjusting the angle of each set of termination contacts while reducing the adverse effects of unbalanced coupling. And adjusting the angle of the termination contacts helps to improve the balance characteristics of the corresponding wire pair. This results in better pair balance, improved pair crosstalk and improved loop loss;

2. by angling each set of parallel termination contacts, the distance of the termination contacts between the wire pairs may be increased, suitably reducing the coupling area of adjacent termination contacts, and reducing unbalanced crosstalk between the wire pairs. While when crosstalk exists, unbalanced crosstalk compensation between pairs is undesirable. Unbalanced compensation of crosstalk can result in poor balance of the wire pairs. Thus, rotating the parallel termination contacts in opposite directions by a certain angle allows the module to achieve better high frequency transmission performance (e.g., NEXT, ANEXT);

3. because the end contact points are uniformly and symmetrically distributed in four quadrants by taking the central symmetry axes x and y of the PCB substrate as the center according to each 2 groups, and the transverse axis A-A of each group of the end contact points and the axis of the corresponding wire harness slot form two complementary angles (parallel to the bisector of the angle formed by the axes of the two end contact points in the same group), the distance from the center of each wire pair to the end joint of the end contact point is consistent, and the influence of the operation of personnel is small, so that better balance performance and operation stability can be obtained.

Drawings

Fig. 1 is an exploded view of an exemplary RJ 45-style communications connector in an embodiment of the present invention.

Fig. 2 is a diagram of the termination contacts and distribution of the present invention mounted to a PCB substrate.

Fig. 3 is a diagram of conventional termination contacts and distribution mounted to a PCB substrate.

Fig. 4 is a termination block at both ends of a cable with two wire pair crossings (blue-orange wire pair or green-brown wire pair) at each end.

Fig. 5 is a bundle of lines in a termination block in an exemplary embodiment.

In the figure 1 is a connector housing, 2 is a connector contact, 3 is a PCB substrate, 4 is a termination contact, 5 is a termination guide block, and 6 is a termination block.

Detailed Description

Referring to fig. 1, an exploded view of an exemplary RJ 45-style communications connector is shown in which a connector housing (1) may house a number of components. The connector contacts (2) are used to make electrical contact with contacts in an RJ45 plug. The connector contacts (2) may be in the form of wire springs or flexible circuit material or the like. The PCB substrate (3) is used to establish an electrical connection between the connector contacts (2) and the termination contacts (4). The PCB substrate (3) may be a printed circuit board with printed traces therein for connecting the connector contacts (2) and the termination contacts (4) for the purpose of establishing an electrical connection. As described in further detail herein, the PCB substrate (3) may include compensation elements for adjusting electrical performance. The connector housing (1) may be electrically conductive to provide shielding of the connector. The termination guide (5) may hold the termination contacts (4) in a particular position and fixed, as described in further detail herein, with the transverse axis a-a of each set of termination contacts (4) forming a first and a second angle with the central axis of symmetry x of the PCB substrate (3), the first angle being different from the second angle.

The binding grooves of the termination block (6) are used for binding different wire pairs (blue, orange, green and brown wire pairs) in the cable, and the wire pairs with different colors are respectively bound and connected in corresponding binding grooves according to the colors marked on the termination block (6). The beam slot axis z forms two complementary angles-a third and a fourth angle-with the transverse axis a-a of each set of terminal contacts (4). When the terminal block (6) of the bundled cable is pressed into the connector housing (1) in the direction designated by the terminal guide block (5), the terminal contacts (4) can pierce the insulation layer of the corresponding wire to establish electrical connection between the terminal contacts (4) and the corresponding wire harness.

Referring to fig. 2, the angle of the transverse axis of each terminal contact (4) with respect to the reference axis x, y of the PCB substrate (3) varies between each terminal contact (4) and forms an angle for each pair of terminal contacts (4). By adjusting the angle of the termination contacts, proper coupling is achieved while reducing the negative effects of unbalanced coupling. As described in further detail herein, the differing angles of the termination contacts (4) of each set of pairs is beneficial in improving the balance characteristics of the pairs, improving the degree of coupling between the pairs, and causing the radiation generated by the pairs to be reduced so as not to be as great as that seen in the prior art. Thus, greater balance characteristics, better crosstalk and alien crosstalk characteristics, and better loop loss can be obtained. Further, due to the included angle between each pair of termination contacts (4), unbalanced crosstalk between the wire pairs is reduced. It has been demonstrated that unbalanced compensation results in poor balance when crosstalk is present, which in turn degrades high frequency transmission performance such as NEXT, ANEXT, and the like. The non-equilibrium compensation can be effectively avoided by forming each group of terminal contacts (4) at a certain angle.

Referring to fig. 2, fig. 3 illustrates the placement of the present invention with prior art termination contacts (4) in a plurality of RJ 45-style communications connectors in close proximity to one another in a mounting application (e.g., in a 1U48 port panel). As will be described in further detail herein, for ease of comparison, the RJ 45-style communications connector of fig. 2 and 3 is arranged with equal spacing between the transverse axis and the longitudinal axis. 7. 8 respectively represent circles of the same radius r centered on the outermost terminal contact (4) in both solutions. It has been found that, in the same case, the invention provides a greater distance from the termination strip (4) adjacent to the RJ 45-type communications connector than the termination strip (4) of the prior art solution. A larger distance has proven effective in reducing alien crosstalk in RJ 45-type communication connectors. Also, the RJ 45-type communications connector of the present invention can have a smaller overall size while maintaining the same alien crosstalk, which can satisfy the customer's desire for more RJ 45-type communications connectors to fit into a given size of space.

As is well known in the art, the pairs in the cable are arranged as twisted pairs of end and ring conductors. The wire pairs are generally represented by the following designations: BL/W (blue white line) and BL (blue white line), OR/W (orange white line) and OR (orange line), GR/W (green white line) and GR (green line), BR/W (brown white line) and BR (brown line). The designation blue-line pair herein refers to the BL/W (blue-white line) and BL (blue-line) pairs. The cable technology in the field determines the positions of the wire pairs at the two ends of the cable to be mirror images of each other. Thus, to minimize the adverse effects of this crossover, the present invention employs only two pairs of wires being crossed at one end of the cable, as the cable is typically terminated to an RJ 45-style communications connector, where such orientation in the cable typically results in crossing of the wire pairs. As described in further detail herein, if the blue-orange pair at one end of the cable crosses, the brown-green pair does not cross; the other end is crossed by a brown-green line pair, and the blue-orange line pair is not crossed. This makes full use of the internal space of an RJ 45-type communications connector, reducing the effects of wire pair crossover. And because the terminating contacts (4) are uniformly and symmetrically distributed in four quadrants by taking the central symmetry axes x and y of the PCB substrate (3) as the center according to every 2 groups, and the wire harness grooves of the terminating block (6) and the transverse axis A-A of each terminating contact (4) form a certain angle and are kept parallel, the total length of the two ends of the wire length L of each wire pair from the center of the cable to the clamping point of the terminating contact (4) is kept equal, as shown in figure 5. This reduces the imbalance caused by untwisted wire pairs having different lengths. The difference brought by different operators can be reduced, the variability of the connection of the RJ45 type communication connector is reduced, the performance of the whole wiring system is more stable, the design performance of the RJ45 type communication connector can be fully exerted, and the overall performance of the wiring system is improved.

Referring to fig. 5, it can be seen that the transverse axis a-a of each set of termination contacts (4) forms two complementary angles with the corresponding beamline slot axis z (parallel to the bisector of the angle formed by the axes of the two termination contacts (4) of the same set) such that the distance of each pair from the center of the cable to the termination of the termination contacts (4) is uniform. And because the wire harness forms a certain angle with the axis of the terminal contact (4), the force of the terminal contact (4) for puncturing the insulation layer of the wire harness can be increased, and the reliability of the J45 type communication connector terminal is improved.

Claims

1. An RJ45 type communication connector with non-parallel reed arrangement, characterized by comprising a connector housing (1), a plurality of connector contacts (2) mounted on the connector housing, a PCB substrate (3) having terminals for receiving the connector contacts, a plurality of terminal contacts (4) mounted on the PCB substrate (3), terminal guide blocks (5) for holding the terminal contacts in a specific position and fixed, terminal blocks (6) provided with wiring slots angled and parallel to the transverse axis A-A of each terminal contact, said elements being connected in sequence; the termination contacts (4) are uniformly and symmetrically distributed in four quadrants according to every 2 groups of termination contacts by taking the central symmetry axes x and y of the PCB substrate (3) as centers, and the transverse axis A-A of each group of termination contacts (4) and the central symmetry axis x of the PCB substrate (3) form a first angle and a second angle, wherein the first angle is different from the second angle.

2. A non-parallel reed arrangement RJ 45-type telecommunications connector according to claim 1, characterized in that the connector contacts (2) are wire springs or flexible circuit material, the screen PCB substrate (3) establishes electrical connection between the connector contacts (2) and the termination contacts (4), the connector housing (1) is conductive for printed circuit boards with printed traces, and the termination guide (5) keeps the termination contacts (4) in a unique position and fixed.

3. A non-parallel reed arrangement RJ 45-type telecommunications connector according to claim 1, characterized in that the screen PCB substrate (3) further comprises compensation elements for adjusting electrical properties.

4. A non-parallel reed arrangement RJ 45-type communications connector according to claim 1, wherein the bundling slots of the termination block (6) are used to bundle different pairs of wires in a cable, different pairs being located in different bundling slots on the termination block (6); the beam slot axis z forms two complementary angles, a third and a fourth angle, with the transverse axis a-a of each set of termination contacts (4); when the terminal block (6) of the bundled cable is pressed into the connector shell (1) in the direction designated by the terminal guide block (5), the terminal contact (4) pierces the insulation layer of the corresponding wire to establish the electrical connection between the terminal contact (4) and the corresponding wire harness.

5. A non-parallel reed arrangement RJ 45-type telecommunications connector according to claim 1, characterized in that the angle of the transverse axis of the termination contacts (4) with respect to the reference axis x, y of the PCB substrate (3) differs between each of the plurality of termination contacts (4) and is such that each pair of termination contacts (4) forms an angle; by adjusting the angle of the termination contacts, coupling, partial coupling or uncoupling is possible while reducing the negative effects of unbalanced coupling.