Cable differential unit structure

Abstract

The invention relates to the technical field of connectors, in particular to a cable differential unit structure which comprises a head base, a base portion, a metal shielding clamp, two contact pins and a differential wire. Wherein the two contact pins are fixed in the base part in parallel, two end parts of the contact pins are exposed and are respectively connected with the head base and the differential wire, and the metal shielding clamp is arranged outside the base part and clamps and fixes the differential wire. By arranging the metal shielding clamp, on one hand, the shielding function is achieved, the contact piece is not interfered by external signals, on the other hand, the function of fixing the base and the cable is achieved, meanwhile, the shielding clamp is connected with the ground wire of the differential wire pair to achieve the good shielding function, a complete ground loop is provided for the signal wire pair, and the reliability of the signal wire pair is improved. The consistency of the internal impedance of the connector is ensured; moreover, the device is compact in overall structure, controllable in impedance, good in shielding effect, capable of providing a reliable backflow path for the contact, capable of achieving automatic assembly, low in cost and suitable for batch production and use.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, in particular to a cable differential unit structure. Background Art

[0002] As the performance of electronic equipment continues to improve, the demand for signal transmission rate is getting higher and higher, and information processing is getting faster and faster. Therefore, the requirements for connectors' low loss, low crosstalk, impedance matching, shielding performance and other indicators are constantly increasing.

[0003] Traditional high-speed transmission links usually include high-speed connectors, printed circuit board traces, high-speed cables and other parts. Among these transmission paths, the transmission loss of printed circuit board traces is the largest, which directly affects the transmission rate and transmission distance of the entire link. Therefore, in many cases, it is recognized that the length of printed circuit board traces is minimized and high-speed differential lines are used for signal transmission, thereby reducing the loss on the entire transmission path and improving the transmission rate and transmission distance of the system.

[0004] When using differential cables for transmission, the terminated connectors need to meet the requirements of low cost and miniaturization. At the same time, the termination of the connector and the cable must be reliable, consistent, and have good impedance matching. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and provides a cable differential unit structure. The specific technical solution is as follows:

[0006] The cable differential unit structure includes a head base, a base portion, a metal shielding clamp, two pins and a differential line;

[0007] Among them, two pins are fixed in parallel in the base part, and both ends of the pins are exposed and respectively connected to the head base and the differential line, and the metal shielding clip is installed outside the base part and clamps the differential line.

[0008] As a further technical solution of the present invention, the pin includes a transition zone penetrating the base, a contact zone connected to one end of the transition zone, and a welding zone connected to the other end of the transition zone, wherein the contact zone of the pin is a twisted wire micro-needle structure and is connected to the head base, and the welding zone of the pin is welded to the differential line.

[0009] As a further technical solution of the present invention, the end surfaces of the base 1 and the base 2 facing each other are both provided with semicircular grooves corresponding to the pins;

[0010] In the installed state, the semicircular grooves on the base one and the base two cooperate with each other to form a channel, and the transition area of ​​the pin is arranged in the channel.

[0011] As a further technical solution of the present invention, the base one and the base two are connected by a plurality of sets of fixing parts, and the fixing parts include fixing holes and fixing columns. In the installed state, the fixing holes and the fixing columns are interference fit.

[0012] As a further technical solution of the present invention, the head base is provided with a mounting hole, and in the installed state, the contact area of ​​the pin is inserted into the mounting hole to connect to the head base.

[0013] As a further technical solution of the present invention, the metal shielding clip is divided into four functional areas, and the metal shielding clip has a front end area, a middle area, a welding area and a tail end fixing area;

[0014] A plurality of narrow spring structures are arranged transversely on the front end region, and a free end of the front end region vertically extends inward to form a bent portion;

[0015] The base 1 has a right square groove, and the base 2 has a left square groove;

[0016] In the installed state, the right square groove and the left square groove are connected to form a square through groove, and the bent portion on the metal shielding clip is clamped in the square through groove on the base portion.

[0017] As a further technical solution of the present invention, the middle area is an ear piece extending vertically from the root to the free ends on both sides;

[0018] The outer side of the base 1 has a right base platform, and the outer side of the base 2 has a left base platform;

[0019] In the installed state, the right base platform and the left base platform cooperate to form a base platform, and the two ears are bent inward to form a large cavity wrapped outside the base platform.

[0020] As a further technical solution of the present invention, the welding area is an extension arm extending vertically from the root to the free ends on both sides, and the two extension arms are bent and extended to both sides to form two welding planes;

[0021] The differential line has four conductors arranged in parallel, which are two core wires and two ground wires from the inside to the outside;

[0022] In the installed state, the two core wires are connected to the welding areas of the two pins respectively, and the two ground wires are fixed by welding to the two welding planes respectively.

[0023] As a further technical solution of the present invention, the tail end fixing area is a clip extending vertically from the root to the free ends on both sides. In the installed state, the two clips are bent inward to form a small cavity that wraps the differential line.

[0024] The beneficial effects of the present invention are as follows:

[0025] In the present application, a metal shielding clamp is provided, which, on the one hand, plays a shielding function so that the contact will not be interfered by external signals, and on the other hand, has the function of fixing the base and the cable. At the same time, the shielding clamp is connected to the ground wire of the differential line pair to play a better shielding function, providing a complete ground loop for the signal line pair, ensuring the consistency of the internal impedance of the connector; and the overall structure of the device is compact, the impedance is controllable, and the shielding effect is good, which can provide a reliable return path for the contact pair, and can realize automated assembly, with low cost, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 shows the overall schematic diagram of the cable differential unit structure;

[0027] Figure 2 The exploded schematic diagram of the parts after the metal shielding clip is removed from the cable differential unit structure is shown;

[0028] Figure 3 A schematic diagram of the structure of the cable differential unit structure without the metal shielding clip is shown;

[0029] Figure 4 A schematic diagram of the structure of a metal shielding clip is shown;

[0030] Figure 5 A schematic diagram of the connecting structure of the metal shielding clip is shown;

[0031] Figure 6 A schematic diagram of the assembled metal shielding clip in the cable differential unit structure is shown. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0033] Figure 1The overall schematic diagram of the cable differential unit structure is shown; in the view, the overall structure is schematically shown from the front and back of the cable differential unit structure; the cable differential unit structure includes a head base 10, a base part, a metal shielding clamp 13, two pins 14 and a differential line 15, wherein the two pins 14 are fixed in parallel in the base part, and the parallel means that the two are parallel and orderly arranged, and the ends of the two are flush, and the two ends of the pins 14 are exposed and respectively connected to the head base 10 and the differential line 15, that is, the pin head is assembled in the head base, and the pin tail is connected to the differential line 15 connection, the metal shielding clip 13 is installed outside the base and clamps the differential line 15, that is, the metal shielding clip 13 can serve as a bridge connecting the differential line 15 and the base, so as to further strengthen the connection effect between the two; all parts are fixed as a whole by a metal shielding clip 13 to become a differential unit of a cable for high-speed differential signal transmission; in actual use, multiple identical differential units 1 are arranged and combined horizontally or vertically and are properly fixed by structural parts to form various transmission bridges, which can be used for reliable transmission of multi-channel high-speed signals.

[0034] It should be noted that the cable differential unit in this embodiment is designed as a right-angle structure, that is, the cable routing and the contact piece are ninety degrees; at the same time, the differential unit can also be designed as a straight structure, that is, the cable routing and the contact piece are parallel; or designed as a curved routing structure, that is, the cable routing and the contact piece have a routing structure with a certain angle; the applicant would like to emphasize that the overall shape of the cable differential unit structure is not restricted, that is, the angle between the base and the pin 14 is not restricted.

[0035] Figure 2 The exploded schematic diagram of the parts after the metal shielding clip is removed from the cable differential unit structure is shown; Figure 2 In the figure, the pin 14 includes a transition zone 142 penetrating the base, a contact zone 141 connected to one end of the transition zone 142, and a welding zone 143 connected to the other end of the transition zone 142, wherein the contact zone 142 of the pin 14 is a twisted wire micro-needle structure and is connected to the head base 10, the welding zone 143 of the pin 14 is welded to the differential line 15, and the welding zone 143 is one of a welding cup structure and a welding hole structure; the contact zone 141 at the end of the pin 14 adopts a twisted wire micro-needle structure, which is characterized by a small size and reliable contact; the transition zones 142 are parallel in batches to ensure impedance consistency on the transmission path; the welding zone 143 can be designed as a welding cup structure or a welding hole structure.

[0036] The base portion includes a base 11 and a base 2 12 connected to each other, and the two are detachably connected, which can be a card joint, a bolt connection, etc.; the base 11 and the base 2 12 are provided with semicircular grooves corresponding to the pins 14 on their end surfaces facing each other, that is, the semicircular groove 112- on the base 11 and the semicircular groove 2 122 on the base 2 12, and the correspondence here refers to the correspondence in quantity, that is, in this embodiment, the semicircular grooves on the base 11 and the base 2 12 are provided with two groups, and in the installed state, the semicircular grooves on the base 11 and the base 2 12 are They cooperate with each other to form a channel, and the transition zone 142 of the pin 14 is arranged in the channel. The channel is used to limit the position of the transition zone 142 of the pin 14 to ensure that the two can always be parallel to maintain the impedance consistency on the transmission path; the base 11 and the base 2 12 are connected by a plurality of groups of fixing parts, and the fixing parts include fixing holes 111 and fixing columns 121. In the installed state, the fixing holes 111 and the fixing columns 121 are interference fit; the fixing parts are used to position the installation of the base 11 and the base 2 12 to ensure that the two can be assembled according to the pre-designed structure.

[0037] The head base 10 has a mounting hole 100. In the mounted state, the contact area 141 of the pin 14 is inserted into the mounting hole 100 to connect the head base 10. After the base 1 11 and the base 2 12 clamp the pin 14, they are then mounted with the head base 10 to form a combined unit.

[0038] Figure 3 The schematic diagram of the structure of the cable differential unit structure without the metal shielding clip is shown; after assembly, the tail end welding area 143 of the pin 14 is exposed to the outside of the base part, and can be used for subsequent welding with the core wire of the differential line 15; the base 1 1 has a right square groove 110, and the base 2 12 has a left square groove 120. In the installed state, the right square groove 110 and the left square groove 120 are connected to form a square through groove 1120 for subsequent assembly; the outer side of the base 1 11 has a right base platform 113, and the outer side of the base 2 12 has a left base platform 123. In the installed state, the right base platform 113 and the left base platform 123 cooperate to form a base platform 1123 for subsequent assembly and fixation.

[0039] Figure 4 The metal shielding clip 13 is divided into four functional areas, and the metal shielding clip 13 has a front end area 130 , a middle area 131 , a welding area 132 and a tail end fixing area 133 .

[0040] A plurality of narrow spring pieces 1301 are arranged horizontally on the front end area 130, and the free end of the front end area 130 extends vertically inward to form a bent portion 1302. In the installed state, the bent portion 1302 on the metal shielding clip 13 is stuck in the square through groove 1120 on the base to form a preliminary and buckled fit; wherein, the front end area 130 is a cantilever beam extending from the root to the free end, and its main function is to fix and cooperate with the base.

[0041] The middle area 131 is an ear piece extending vertically from the root to the free ends on both sides. In the installed state, the two ears are bent inward to form a large cavity 1311 wrapped around the base platform 1123; that is, it is a straight structure before assembly and is not bent inward. After being installed with base 11 and base 2 12, the two ears are bent inward to form a large cavity 1311 and the base is securely fixed therein.

[0042] The welding area 132 is designed to be an extension arm extending vertically from the root to the free ends on both sides, and the two extension arms are bent and extended to both sides to form two welding planes 1321; its main function is to weld with the differential line 15.

[0043] The tail end fixing area 133 is a clip extending vertically from the root to the free ends on both sides. In the installed state, the two clips are bent inward to form a small cavity 1331 that wraps the differential line 15; that is, it is a straight structure before assembly and is not bent inward. After being assembled with the differential line 15, the two cantilever beams are bent inward to form a small cavity 1331 to reliably fix the differential line 15.

[0044] Figure 5 The schematic diagram of the connecting material structure of the metal shielding clip 13 is shown. The metal shielding clip 13 is formed by die stamping, and a connecting material belt 134 structure is designed at its tail end. A V-cut 1341 structure is designed between the connecting material belt 134 and the metal shield 13, which is convenient for subsequent automatic assembly and breaking of parts; the metal shielding clip 13 has a compact structure, low cost, and convenient assembly. At the same time, the metal shielding clip 13 has multiple functions such as shielding function, fixing cables, fixing bases, and connecting with cable ground wires.

[0045] Figure 6The schematic diagram of the metal shielding clip 13 in the cable differential unit structure after assembly is shown. First, the bent portion 1302 on the metal shielding clip 13 is clamped on the square through groove 1220 formed by the right square groove 110 and the left square groove 120 of the base to form a preliminary and buckled fit; then, the base 11 and the base 2 12 are installed on the middle area 131 of the metal shielding clip 13, and the two ears are bent inwardly by the tooling to form a large cavity 1311 to reliably fix the base platform 1123 therein; again, the differential line 15 is assembled to the tail end fixing area 133 of the metal shielding clip 13, and the two clips are bent inwardly by the tooling to form a small cavity 1331 to reliably fix the differential line 15 therein.

[0046] Four conductors are arranged in parallel in the differential line 15, which are two core wires 151 and two ground wires 152 from the inside to the outside. In the installed state, the two core wires 151 are connected to the welding areas 143 of the two pins 14, and the two ground wires 152 are welded and fixed to the two welding planes 1321 respectively; the two ground wires 152 of the differential line 15 are adjusted to the two welding planes 1321 on the metal shielding clip 13 and welded to form a fixation, and then the core wires 151 are welded to the two welding areas 143 respectively. Finally, after the cable is welded, a cable differential unit structure 1 is formed as a whole.

[0047] The present invention relates to a cable differential unit structure 1, which uses a metal shielding clip 13 formed by die stamping to fix the pin, base and differential cable into an integral structure for high-speed signal transmission. The structure has the characteristics of compact structure, low cost and miniaturization. At the same time, the termination of the connector and the cable should be reliable, consistent and with good impedance matching, and is particularly suitable for cable interconnection inside a chassis and cable interconnection between chassis.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Cable differential unit structure, characterized in that: It includes a header base, a base portion, a metal shielding clip, two pins and a differential line; Among them, two pins are fixed in parallel in the base part, and both ends of the pins are exposed and respectively connected to the head base and the differential line, and the metal shielding clip is installed outside the base part and clamps the differential line.

2. The cable differential unit structure according to claim 1, characterized in that: The plug pin includes a transition zone penetrating through the base, a contact zone connected to one end of the transition zone, and a welding zone connected to the other end of the transition zone, wherein the contact zone of the plug pin is a twisted wire micro-needle structure and is connected to the head base, and the welding zone of the plug pin is welded to the differential line.

3. The cable differential unit structure according to claim 2, characterized in that: The end surfaces of the base 1 and the base 2 facing each other are both provided with semicircular grooves corresponding to the pins; In the installed state, the semicircular grooves on the base one and the base two cooperate with each other to form a channel, and the transition area of ​​the pin is arranged in the channel.

4. The cable differential unit structure according to claim 3, characterized in that: The base 1 and the base 2 are connected through a plurality of sets of fixing parts, and the fixing parts include fixing holes and fixing columns. In the installed state, the fixing holes and the fixing columns are interference fit.

5. The cable differential unit structure according to claim 3, characterized in that: The head base is provided with a mounting hole, and in the mounted state, the contact area of ​​the pin is inserted into the mounting hole to connect with the head base.

6. The cable differential unit structure according to claim 4, characterized in that: The metal shielding clip is divided into four functional areas, including a front end area, a middle area, a welding area and a tail end fixing area. A plurality of narrow spring structures are arranged transversely on the front end region, and a free end of the front end region vertically extends inward to form a bent portion; The base 1 has a right square groove, and the base 2 has a left square groove; In the installed state, the right square groove and the left square groove are connected to form a square through groove, and the bent portion on the metal shielding clip is clamped in the square through groove on the base portion.

7. The cable differential unit structure according to claim 6, characterized in that: The middle area is an ear piece extending vertically from the root to the free ends on both sides; The outer side of the base 1 has a right base platform, and the outer side of the base 2 has a left base platform; In the installed state, the right base platform and the left base platform cooperate to form a base platform, and the two ears are bent inward to form a large cavity wrapped outside the base platform.

8. The cable differential unit structure according to claim 7, characterized in that: The welding area is an extension arm extending vertically from the root to the free ends on both sides, and the two extension arms are bent and extended to both sides to form two welding planes; The differential line has four conductors arranged in parallel, which are two core wires and two ground wires from the inside to the outside; In the installed state, the two core wires are connected to the welding areas of the two pins respectively, and the two ground wires are fixed by welding to the two welding planes respectively.

9. The cable differential unit structure according to claim 7, characterized in that: The tail end fixing area is a clip extending vertically from the root to the free ends on both sides. In the installed state, the two clips are bent inward to form a small cavity that wraps the differential line.

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