JP6610295B2 - High-speed signal transmission connector and receptacle - Google Patents

Description

The present invention relates to a high-speed signal transmission connector, and more particularly to a high-speed signal transmission connector and receptacle used for a multicore cable capable of high-speed signal transmission such as USB 3.1.

  With the development of information technology, connectors used in personal computers, mobile phones, digital cameras, music players, car electronics, and other electronic devices are also required to increase the signal transmission speed in a stable manner. ing. Also, a USB (Universal Serial Bus) standard, which is one of serial bus standards for connecting peripheral devices to information devices such as computers, is known.

  The USB standard has been expanded several times in order to improve the maximum transfer speed, etc., and these are upward compatible from 1.1 to 3.1, except that the functions and performance are bound by the lower standard. For example, it is required to operate correctly even if a lower standard product and a higher standard product are connected. In the latest USB 3.1 standard, in addition to the “SUPER SPEED (Gen 1)” mode with a data transfer rate of 5 Gbps for USB 3.0, a “SUPER SPEED PLUS (Gen 2)” mode that boasts a new maximum transfer rate of 10 Gbps has been added. Has been. In addition, in the USB 3.1 standard, the maximum output of electricity is enhanced to 20V x 5A (100W), which is about 22 times the power supply compared to 5V x 900mA (4.5W) of USB3.0. It is possible to further increase the power supply capability by about 40 times compared with the previous USB 2.0 standard. In addition, the USB 3.1 standard has a fixed vertical direction, type A having a slightly larger size, and 12 pins arranged in two rows in parallel, the vertical direction is not determined, and it works even if it is reversed. There is typeC.

  Conventionally, twisted pair cables have been used as high-speed transmission cables. Generally, twisted pair cables include an unsealed twisted pair cable (UTP) and a shielded twisted pair cable (STP). An unsealed twisted pair cable is a cable formed by twisting a pair of single wires. Unsealed twisted-pair cables are widely used because they have good noise performance that is less susceptible to external noise and less noise radiation than simple parallel wires, or because they are easy to handle and inexpensive. ing. However, the unsealed twisted pair cable cannot be said to have better noise performance than the coaxial cable. Therefore, a shielded twisted pair cable in which noise performance is improved by covering a twisted pair of single wires with a conductive shield is also widely used.

Japanese Patent No. 5066243

  Patent Document 1 describes an electrical connector for a multi-core cable that uses a twisted pair cable, and this electrical connector describes that an increase in impedance or a decrease in noise performance in a twisted-back portion of the twisted pair cable can be suppressed. ing. In a shielded twisted pair cable, high-speed transmission is realized by forming a shield structure in which a differential pair wire (two wires) and a drain wire are twisted and covered with aluminum foil or the like. However, since the portion connected to the connector needs to be crimped to the contact, it is necessary to peel off the aluminum foil, and the twisted state disappears by peeling off the aluminum foil. In the electrical connector described in Patent Document 1, the shield structure is maintained by covering the three cables in a twisted or close state with metal or the like on the connector side. However, when the contacts are finally arranged, the distance between the pair line and the drain line is not constant, so that there is a problem that transmission characteristics are deteriorated.

  Also, with twisted pair cables, even if shielded twisted pair cables are used, it is difficult to achieve the maximum transfer rate of 10 Gbps specified by the USB 3.1 standard, and all high-speed signal lines are coaxial cables for high-speed signal transmission. Attempts have been made to achieve. Even when a coaxial cable is used, it is necessary to suppress an increase in impedance or a decrease in noise performance inside the connector.

Therefore, the present invention is a high-speed signal transmission connector used for a multi-core cable for high-speed signal transmission such as USB 3.1, and for high-speed signal transmission capable of suppressing deterioration of impedance characteristics and noise performance at high frequencies. It is an object to provide a connector and a receptacle .

In order to solve the above problem, a high speed signal transmission connector according to the present invention covers a plurality of signal lines in weaving lines, is connected to the high-speed signal transmission cable formed by covering with covering the braided wire A high-speed signal transmission connector, a plurality of contact terminals connected to each of a plurality of signal lines constituting a high-speed signal transmission cable, an insulator for arranging and fixing the plurality of contact terminals, and a high-speed insulator A plurality of signal lines of the high-speed signal transmission cable arranged on the signal transmission cable side, a cable housing portion formed of a conductive material, an external metal shell covering the insulator and the cable housing portion, and an external metal shell An inner metal shell fixed between the inner peripheral portion and the outer peripheral portion of the insulator, and a plurality of signal lines of the high-speed signal transmission cable Core is characterized to include a plurality of coaxial lines for high-speed signal transmission which is covered with a shield wire. In addition, a receptacle according to the present invention is a receptacle arranged so as to be able to be inserted into and removed from the above-described high-speed signal transmission connector, and is electrically connected to a plurality of contact terminals fixed to an insulator of the high-speed signal transmission connector. It comprises a receptacle contact terminal, a receptacle insulator that supports the receptacle contact terminal, and a metal receptacle shell that covers the receptacle insulator.

  Moreover, it is good also as what further comprises the metal cylinder which covers the circumference | surroundings of said several coaxial line, and has several electroconductivity connected to the said shield wire.

  The plurality of metal cylinders may be connected by contact pieces provided on the external metal shell.

  The cable housing portion may be disposed only around the plurality of coaxial lines.

According to the present invention, in a high-speed signal transmission connector used for a multi-core cable for high-speed signal transmission such as USB 3.1, a high-speed signal transmission connector capable of suppressing deterioration of impedance characteristics and noise performance at high frequencies , And a receptacle can be provided.

It is a perspective view which shows the state which the connector for high-speed signal transmission of this invention and the receptacle fitted. It is a perspective view of the connector for high-speed signal transmission of the present invention. It is a perspective view which shows the state which removed the mold cover of the connector for high-speed signal transmission shown in FIG. FIG. 4 is a perspective view showing a state in which an external metal shell of the high-speed signal transmission connector shown in FIG. 3 is removed. It is a perspective view which shows the state which removed the internal metal shell of the connector for high-speed signal transmission shown in FIG. It is a perspective view which shows the state which removed the cable storage part of the connector for high-speed signal transmission shown in FIG. FIG. 7A is a perspective view showing an internal metal shell of the high-speed signal transmission connector of the present invention, and FIG. 7B is a perspective view showing a cable housing portion of the high-speed signal transmission connector of the present invention. is there. FIG. 8A is a view showing contact terminals of the high-speed signal transmission connector of the present invention, and FIG. 8B is a view showing a metal plate of the high-speed signal transmission connector of the present invention. 9A is a perspective view of an insulator in which a plurality of contact terminals, a metal plate, and an internal metal shell are incorporated, and FIG. 9B is along the line IXb-IXb shown in FIG. 9A. FIG. 9C is a cross-sectional view taken along line IXc-IXc shown in FIG. It is a figure which shows the impedance characteristic by the TDR method when the cable accommodating part of the connector for high-speed signal transmission of this invention is attached and removed. It is a figure which shows another example of the cable storage part of the connector for high-speed signal transmission of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  In addition, the concept of the up-down direction in the following description corresponds to the up-down direction in the attached drawings, and indicates a relative positional relationship between the members, and does not indicate an absolute positional relationship. In the following description, for convenience, the insertion direction of the connector is indicated as “front end”, the reverse direction of the connector insertion direction is indicated as “rear end”, and the left-right direction is a direction orthogonal to the insertion direction of the connector. Indicates “left and right”, but does not indicate an absolute positional relationship.

  FIG. 1 is a perspective view showing a state in which a high-speed signal transmission connector 100 of the present invention and a receptacle 200 are fitted.

  In FIG. 1, a high-speed signal transmission connector 100 according to the present invention is detachably fitted to a receptacle 200 mounted on a mounting substrate 1. Here, for convenience of explanation, the plug-side connector is referred to as a connector, and the receptacle-side connector is referred to as a receptacle. The receptacle 200 includes a plurality of metal receptacle contact terminals 201, a receptacle insulator 202 that is formed of an insulating material and arranges the receptacle contact terminals 201, a receptacle shell 203 that covers the periphery of the receptacle insulator 202 and is formed of a metal material, and the like. Although detailed, detailed description is omitted.

  FIG. 2 is a perspective view of the high-speed signal transmission connector 100 of the present invention.

  In FIG. 2, a high-speed signal transmission connector 100 of the present invention is a connector connected to a multi-core cable 10 for high-speed signal transmission such as a USB 3.1 cable. In this embodiment, an example in which the high-speed signal transmission connector 100 is applied to a connector with a pin arrangement in which 12 pins are arranged in parallel in two upper and lower stages so as to apply to the USB 3.1 type C standard will be described. However, it is not limited to this as long as it is a connector used for a multi-core cable capable of satisfying the requirements. Further, in the pin arrangement of the USB 3.1 type C high-speed signal transmission connector 100 of the present embodiment, as shown in FIG. 2, there are portions where the contact terminals 107 are not arranged at the two lower centers. This is because it is a standard that does not allow reverse insertion for in-vehicle use, but is not limited thereto.

  The high-speed signal transmission connector 100 is externally covered with a mold cover 101 as shown in FIG. The mold cover 101 is formed of an insulating material such as a resin, and is fixed to the outside of an external metal shell 102 described later. Further, a lock mechanism 101a is provided on the upper surface side of the mold cover 101 shown in FIG. 2, so that the high-speed signal transmission connector 100 can be inserted into and removed from the receptacle 200.

  FIG. 3 is a perspective view showing a state in which the mold cover 101 of the high-speed signal transmission connector 100 shown in FIG. 2 is removed.

  In FIG. 3, an external metal shell 102 is disposed inside the mold cover 101. The outer metal shell 102 is formed of a metal material such as stainless steel, for example, and after the inner metal shell 103 to be described later is disposed in order to suppress noise radiated to the outside of the connector or noise entering the inside of the connector. Fixed to the outside. The outer metal shell 102 has a substantially box shape so as to accommodate an inner metal shell 103, a cable storage portion 104, an insulator 105, and the like, which will be described later, and a multi-core cable on the rear end side. Thus, a GND fixing portion 102a for crimping and electrically connecting the braided wire 12 folded around the 10 covering 13 is formed.

  The multicore cable 10 is configured by covering a plurality of signal lines 11 with braided wires 12 and covering the braided wires 12 with a covering 13. As the plurality of signal lines 11, generally, a twisted pair cable for high-speed transmission in which the core line 11a is covered with the covering 11b can be used. However, with USB 3.1, “SUPER SPEED PLUS (Gen 2) with a maximum transfer speed of 10 Gbps is used. ) "Mode must be achieved, and a coaxial wire 14 in which a core wire 14a is covered with a shield wire 14c through an insulating material 14b and a sheath 14d is provided around the signal wire for high-speed transmission is used. You can also.

  In addition, a mold cover holding portion 102b that is bent 90 degrees upward and has a rectangular shape is formed in the upper portion of the outer metal shell 102 on the front end side. The mold cover holding part 102b holds the front end side of the mold cover 101 inserted from the rear end side.

  Further, the outer metal shell 102 has four contact pieces which are bent at the inside of the substantially box-shaped outer metal shell 102 at two locations near the center of the upper surface and the lower surface shown in FIG. 102c is provided. The four contact pieces 102c are provided around a plurality of coaxial wires 14 to be described later due to their spring properties, and are folded around the coating 14d of the coaxial wires 14, or the coating 14d is stripped and below it. The plurality of metal cylinders 106 connected to the shield wire 14c exposed from the contact are contacted. When the metal tube 106 is brought into contact with the contact piece 102c of the outer metal shell 102, the GND connection is strengthened, and further suppression of radiation and intrusion of high-frequency noise is expected. Here, the contact pieces 102c are provided in four rectangular shapes, but this number is not limited to this shape.

  FIG. 4 is a perspective view showing a state where the external metal shell 102 of the high-speed signal transmission connector 100 shown in FIG. 3 is removed.

  In FIG. 4, an inner metal shell 103 made of a metal material such as stainless steel and a cable housing portion 104 are arranged inside the outer metal shell 102. The inner metal shell 103 is fixed to the outside of the insulator 105 to which a plurality of contact terminals 107 described later are inserted and fixed, and suppresses noise emission and intrusion around the plurality of contact terminals 107. The internal metal shell 103 is provided with a plurality of external contacts 103a for making electrical contact with some of the plurality of contact terminals 107. A detailed description will be given later with reference to FIG. .

  FIG. 5 is a perspective view showing a state in which the inner metal shell 103 of the high-speed signal transmission connector 100 shown in FIG. 4 is removed.

  In FIG. 5, an insulator 105 is disposed inside the inner metal shell 103, and a cable housing portion 104 is disposed on the rear end side. The cable storage unit 104 is formed of a conductive material such as die-cast, and has a high-frequency impedance characteristic and noise performance during high-speed signal transmission, which is a problem in order to achieve the maximum transfer rate of 10 Gbps defined by USB 3.1. It is provided in order to suppress the lowering of. By providing the cable storage portion 104, there is an effect shown in FIG. The shape of the cable storage portion 104 is shown in FIG. 7B, which will be described later, and will be described in detail later.

  6 is a perspective view showing a state in which the cable housing portion 104 of the high-speed signal transmission connector 100 shown in FIG. 5 is removed.

  In FIG. 6, the insulator 105 is formed of an insulating material such as a resin, and a plurality of contact terminals 107 connected to the core wires 11 a of the signal wires 11 and the core wires 14 a of the coaxial wires 14 of the multicore cable 10 are inserted. And fixed. A plurality of metal tubes 106 made of a metal material such as brass or stainless steel are provided around the plurality of coaxial wires 14 that are signal lines for high-speed transmission. The metal tube 106 is formed in a U-shape before crimping, and is fitted around the coaxial line 14 and then crimped to the shield wire 14c that appears from under the coating 14d. Electrical connection is made by soldering or the like to the shield wire 14c exposed from the bottom of the 14 coating 14d. By providing the metal tube 106, there is an effect of suppressing deterioration of impedance characteristics and noise performance at the time of high frequency transmission, which becomes a problem at the time of high speed signal transmission.

  A metal plate 108 made of a metal material such as stainless steel is inserted into a position where the plurality of contact terminals 107 in which 12 pins of the insulator 105 are arranged in parallel in two stages are vertically divided. The metal plate 108 is provided with a plurality of internal contacts 108a for making electrical contact with some of the plurality of contact terminals 107 as shown in FIG. 8B described later. It will be described later.

  FIG. 7A is a perspective view showing the inner metal shell 103 of the high-speed signal transmission connector 100 of the present invention, and FIG. 7B shows the cable housing portion 104 of the high-speed signal transmission connector 100 of the present invention. It is a perspective view shown.

  In FIG. 7A, the internal metal shell 103 is formed of a metal material such as stainless steel, and includes a plurality of external contacts 103a for making electrical contact with some of the plurality of contact terminals 107. Several contact terminals 107 connected to the plurality of external contacts 103a can be electrically shared. Thereby, non-quantitative connection such as soldering can be avoided, and stable connection between the contact terminals 107 can be easily realized. The signal line 11 and the coaxial line 14 of the multi-core cable 10 may be connected to one of several contact terminals 107 that can be shared. In addition, according to the present embodiment, in accordance with the USB 3.1 type C pin arrangement table, four pins arranged in parallel on each of the upper and lower two stages are arranged so that they can be shared as GND pins. A plurality of external contacts 103a are provided at positions corresponding to these four pins, but the position or the number of the external contacts 103a is not limited. In addition, the plurality of external contacts 103a extend toward the tip side and are plate-like protruding pieces having spring properties. However, the present invention is not limited to this, and any shape that can electrically contact the plurality of contact terminals 107 is possible. That's fine.

  In FIG.7 (b), the cable accommodating part 104 is formed with electroconductive materials, such as die-casting. A plurality of grooves 104 a are formed in the cable housing portion 104, and the plurality of signal lines 11 and the coaxial line 14 of the multicore cable 10 connected to the plurality of contact terminals 107 inserted into the insulator 105 are connected to the insulator 105. It is formed in a shape arranged on the rear end side. In this example, a plurality of grooves 104a are formed so as to conform to the pin arrangement in which 12 pins are arranged in parallel in two upper and lower stages in accordance with the USB 3.1 type C pin arrangement table. Is not limited, and a plurality of grooves 104 a may be formed in accordance with the number of signal lines 11 or coaxial lines 14 included in the multicore cable 10. Further, here, die casting is used as a material for the cable housing portion 104 for weight reduction. However, the present invention is not limited to this, and the portions on the rear end side of the plurality of contact terminals 107 in the connector are electrically conductive. If it can be filled with the material of, it will not be limited to this. Further, as shown in FIG. 11 described later, the cable housing portion 104 may be arranged only around the coaxial line 14 used as a signal line for high-speed transmission.

  8A is a view showing the contact terminal 107 of the high-speed signal transmission connector 100 of the present invention, and FIG. 8B is a view showing the metal plate 108 of the high-speed signal transmission connector of the present invention. .

  In FIG. 8A, the contact terminal 107 is made of a metal such as copper, and the contact portion 107a having a substantially square pillar shape that contacts the receptacle contact terminal 201 when the connector is fitted, and the signal line 11 of the multicore cable 10 A crimping part 107b for fixing the core wire 11a and the core wire 14a of the coaxial line 14 by crimping, and a covering part 11b for the signal line 11 and a fixing part 107c for fixing the insulating material 14b of the coaxial line 14 are provided. The internal metal shell 103 or the metal plate 108 is brought into contact with some of the contact terminals 107 that can be shared as described above, so that the signal line 11 and the coaxial line 14 of the multi-core cable 10 are contacted. One of them may be connected.

  In FIG. 8B, the metal plate 108 is formed of a metal material such as stainless steel, and includes a plurality of internal contacts 108 a for making electrical contact with some of the plurality of contact terminals 107. Several contact terminals 107 connected to the plurality of internal contacts 108a can be electrically shared. Thereby, non-quantitative connection such as soldering can be avoided, and stable connection between the contact terminals 107 can be easily realized. The signal line 11 and the coaxial line 14 of the multi-core cable 10 may be connected to one of several contact terminals 107 that can be shared. Further, in this embodiment, in accordance with the USB 3.1 type C pin arrangement table, the 4th and 9th pins of each stage arranged in parallel with 12 pins in two upper and lower stages are used as power supply pins. A plurality of internal contacts 108a are provided at positions corresponding to these four pins, but are not limited to these positions or number. Further, in the present embodiment, the metal plate 108 is formed by bending a metal material so that two sheets are in close contact with each other, and the plurality of internal contacts 108a are provided above and below, but the present invention is not limited to this. Further, the plurality of internal contacts 108a are plate-like protruding pieces that extend toward the rear end side and have spring properties. However, the present invention is not limited to this, and any shape that can electrically contact the plurality of contact terminals 107 is possible. That's fine.

  9A is a perspective view of an insulator 105 in which a plurality of contact terminals 107, a metal plate 108, and an internal metal shell 103 are incorporated, and FIG. 9B is an IXb-IXb shown in FIG. 9A. FIG. 9C is a cross-sectional view taken along line IXc-IXc shown in FIG. 9A.

  As described above, in FIG. 9B, the plurality of internal contacts 108a provided on the metal plate 108 are in electrical contact with some of the plurality of contact terminals 107, and some of the contact terminals 107 in contact with each other are in contact. Can be shared electrically. Similarly, in FIG. 9C, the plurality of external contacts 103 a provided on the inner metal shell 103 are in electrical contact with some of the plurality of contact terminals 107, and some of the contact terminals 107 in contact with each other are in contact with each other. It can be shared electrically.

  FIG. 10 is a diagram showing impedance characteristics according to the TDR method when the cable housing portion 104 of the high-speed signal transmission connector 100 of the present invention is attached and removed.

  In FIG. 10, the horizontal axis indicates time (s), the vertical axis indicates impedance (Ω), the solid line indicates the case where the cable storage unit 104 is attached, and the dotted line indicates the case where the cable storage unit 104 is removed. The TDR (Time Domain Reflectometry: time domain reflection) method is a technique for measuring impedance characteristics of cables and printed circuit boards. Since the impedance characteristic at an arbitrary position on the transmission line is known by the TDR method, the performance of the cable, the printed board, and other components can be evaluated.

  As shown in FIG. 10, when the dotted cable storage unit 104 is removed, it can be seen that the impedance has two peaks exceeding a certain value, but when the solid line cable storage unit 104 is attached, It can be seen that the two peaks are smaller and improved. From this, it can be seen that the high-speed signal transmission connector 100 of the present invention is improved in impedance characteristics at high frequencies by providing the cable housing portion 104 formed of a conductive material such as die-cast.

  FIG. 11 is a diagram showing another example 104A of the cable housing portion of the high-speed signal transmission connector 100 of the present invention.

  In FIG. 11, the cable housing portion 104A is disposed only at the left and right ends where the plurality of coaxial lines 14 that are signal lines for high-speed transmission are disposed, and near the center where the plurality of signal lines 11 that do not require high-speed transmission are disposed Is not placed. By adopting such a shape, the same effect as the cable housing portion 104 as shown in FIG. 10 described above can be obtained. In addition, although the cable storage part 104 was shown in FIG.7 (b) and the cable storage part 104A was shown in FIG. 11, the shape of a cable storage part is not limited to these shapes.

  As described above, according to the high-speed signal transmission connector of the present invention, the high-speed signal transmission connector used in the high-speed signal transmission multi-core cable such as USB 3.1 has reduced impedance characteristics and noise performance at high frequencies. Can be suppressed.

DESCRIPTION OF SYMBOLS 1 Mounting board 10 Multi-core cable 11 Signal line 11a, 14a Core line 11b, 13, 14d Coating 12 Braided wire 14 Coaxial line 14b Insulation material 14c Shielded wire 100 High-speed signal transmission connector 101 Mold cover 102 External metal shell 103 Internal metal shell 103a External contact 104, 104A Cable housing part 105 Insulator 106 Metal cylinder 107 Contact terminal 108 Metal plate 108a Internal contact 200 Receptacle 201 Receptacle contact terminal 202 Receptacle insulator 203 Receptacle shell

Claims (5)

A high-speed signal transmission connector connected to a high-speed signal transmission cable configured by covering a plurality of signal lines with a braided wire and covering the braided wire with a covering,
A plurality of contact terminals connected to each of a plurality of signal lines constituting the high-speed signal transmission cable;
An insulator for arranging and fixing the plurality of contact terminals;
A cable housing portion disposed on the high-speed signal transmission cable side of the insulator, arranging the plurality of signal lines of the high-speed signal transmission cable, and formed of a conductive material;
An external metal shell covering the insulator and the cable housing;
An inner metal shell fixed between an inner periphery of the outer metal shell and an outer periphery of the insulator,
The high-speed signal transmission connector, wherein the plurality of signal lines of the high-speed signal transmission cable include a plurality of high-speed signal transmission coaxial lines whose core wires are covered with shield wires . The high-speed signal transmission connector according to claim 1, further comprising a plurality of conductive metal tubes covering the periphery of the plurality of coaxial lines and connected to the shield line . The high-speed signal transmission connector according to claim 2, wherein the plurality of metal tubes are connected by contact pieces provided on the outer metal shell . The high-speed signal transmission connector according to claim 1 , wherein the cable housing portion is disposed only around the plurality of coaxial lines . A receptacle disposed so as to be insertable / removable in the high-speed signal transmission connector according to claim 1,
A receptacle contact terminal electrically connected to the plurality of contact terminals fixed to the insulator of the high-speed signal transmission connector;
A receptacle insulator that supports the receptacle contact terminal;
A metal receptacle shell covering the receptacle insulator;
A receptacle comprising: