Data transmission connector

Abstract

The utility model discloses a data transmission connector, which comprises a sheath, an outer conductor, an inner insulator and an inner conductor which are sequentially arranged from outside to inside, one end of the inner conductor is conductively connected with a cable, and the other end of the cable penetrates out of the sheath and then is arranged outside the sheath. The inner insulator of the data transmission connector comprises a main body part and at least one extension part located at the front end of the main body part, the main body part and the extension part are internally and jointly provided with continuously arranged terminal mounting holes, and the outer peripheral wall of the extension part is provided with a plurality of ribs at intervals along the circumferential direction. The impedance matching performance of the inner insulator is adjusted through the arrangement of the ribs, and then the SI performance of the data transmission connector is improved. Through verification, the data transmission connector provided by the utility model can meet the performance requirements of 100M and Gigabit transmission, ensures that the signal integrity performance is met, has lower requirements on the adaptability and assembly of various parts, and is convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a data transmission connector. Background Art

[0002] Consumer electrical connectors are mainly used in the fields of communications, electronic equipment, etc. With the rapid development of new energy vehicles, the performance requirements of related components are getting higher and higher, especially high-speed performance is faster than before. With the rapid development of the automotive industry and the need for the development of in-vehicle ECU, the development of data transmission connectors has emerged. Compared with traditional connectors, the corresponding parts of data transmission connectors have also increased, and the requirements for the matching and assembly of various parts have become more stringent. In addition, due to the need to transmit differential signals, signal transmission integrity (SI) and impedance matching performance of data transmission connectors have become particularly important in the field of special cable connectors. Because the transmission path of special cable connectors is longer, this requires the entire transmission path to be designed with an impedance matching structure to meet the application scenarios of data transmission connectors. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a data transmission connector to solve the technical problems mentioned in the background technology.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a data transmission connector, including a sheath, an outer conductor, an inner insulator and an inner conductor with one end conductively connected to a cable, which are arranged in sequence from the outside to the inside, and the other end of the cable is arranged outside the sheath after passing through the sheath. The inner insulator includes a main body and at least one extension located at the front end of the main body, and the main body and the extension are jointly provided with continuously arranged terminal mounting holes inside, and the inner conductor is at least partially installed in the terminal mounting hole. A plurality of ribs are arranged on the outer peripheral wall of the extension at intervals along the circumferential direction, and the ribs are extended along the busbar direction of the inner insulator.

[0005] In some embodiments, a positioning portion is provided at the front end of the extension portion, and the rib is a long strip structure starting from the positioning portion and extending along the busbar direction of the inner insulator.

[0006] In some embodiments, two extending portions are provided, the front ends of the two extending portions jointly form the positioning portion, and the positioning portion and the two extending portions are connected via a connecting portion.

[0007] In some embodiments, the main body, the extension portion, the connecting portion, the positioning portion, and the ribs are integrally injection molded.

[0008] In some embodiments, a front stop portion and a rear stop portion are sequentially provided on the outer peripheral wall of the inner conductor along the direction in which the inner conductor is installed into the inner insulator. Correspondingly, a step structure corresponding to the front stop portion and a clamping groove corresponding to the rear stop portion are provided on the inner wall of the terminal mounting hole.

[0009] In some embodiments, the rear stop portion is a barb structure provided on the outer peripheral wall of the inner conductor, and the front stop portion is an ear plate structure interfering with the step structure.

[0010] In some embodiments, the snap-in groove is disposed through the extension portion and the rib.

[0011] In some embodiments, at least one positioning groove is circumferentially provided on the outer peripheral wall of the main body, and a piercing structure cooperating with the positioning groove is provided on the outer conductor.

[0012] In some embodiments, the main body and the positioning portion are both square, the extension portion is cylindrical, and the plurality of ribs are protruding from the main body. The outer conductor includes a first portion sleeved on the outside of the plurality of ribs and a second portion sleeved on the outside of the main body. At least one of the ribs has a limiting surface at one end facing the main body, and a slope abutting against the outside of the limiting surface is provided between the first portion and the second portion.

[0013] In some embodiments, the outer conductor is formed by stamping and rolling a plate, and the connection between the plates is connected by a dovetail groove structure or / and welding.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the inner insulator of the data transmission connector of the present invention comprises a main body and at least one extension located at the front end of the main body, the main body and the extension are provided with continuously arranged terminal mounting holes inside, and a plurality of ribs are arranged at intervals along the circumferential direction on the outer peripheral wall of the extension, and the impedance matching performance of the inner insulator is adjusted by the arrangement of the ribs, thereby improving the SI performance of the data transmission connector of the present invention; it has been verified that the data transmission connector provided by the present invention can meet the performance requirements of 100M and 1G transmission, and while ensuring the signal integrity performance, the assembly requirements for the fit of various parts are relatively low, and it is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0016] Figure 1 A cross-sectional view of the data transmission connector provided by the utility model;

[0017] Figure 2for Figure 1 A local enlarged schematic diagram of the middle A;

[0018] Figure 3 for Figure 1 A schematic diagram of the assembly of an outer conductor, an inner insulator and an inner conductor in the data transmission connector shown;

[0019] Figure 4 for Figure 1 A schematic diagram of the assembly of the inner insulator and the inner conductor in the data transmission connector shown;

[0020] Figure 5 for Figure 1 A cross-sectional view of the data transmission connector shown at another angle;

[0021] Figure 6 This is a characteristic impedance simulation result diagram of the data transmission connector of the utility model;

[0022] Figure 7 This is a simulation curve diagram of the return loss of the data transmission connector of the utility model.

[0023] The following are marked in the figure:

[0024] 10. Sheath;

[0025] 20. outer conductor; 201. first part; 202. second part; 203. inclined surface; 204. puncture structure; 205. dovetail groove structure;

[0026] 30, inner insulator; 301, main body; 302, extension; 303, terminal mounting hole; 304, rib; 305, step structure; 306, snap-fit ​​groove; 307, positioning groove; 308, limiting surface; 309, positioning portion; 310, connecting portion;

[0027] 40. Cables;

[0028] 50, inner conductor; 501, front stop portion; 502, rear stop portion;

[0029] 60. The direction in which the inner conductor is installed into the inner insulator. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0033] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] A data transmission connector, such as Figure 1-Figure 5 As shown, it includes a sheath 10, an outer conductor 20, an inner insulator 30, and an inner conductor 50 which is conductively connected to a cable 40 in sequence from outside to inside. The outer conductor 20 is formed by stamping and rolling a plate, and the connection of the plate is connected by a dovetail groove structure 205, or the connection of the plate is connected by welding. Of course, in order to further improve the strength of the outer conductor 20 and avoid the connection of the outer conductor 20 being cracked due to external force when the inner insulator 30 is assembled, thereby causing vibration failure during use, the dovetail groove structure 205 + laser welding can be used to fix the connection of the plate. For details, please refer to Figure 3 ; At the same time, the integrated design of the outer conductor can reduce the investment in wire core crimping parts, save overall costs, and enhance product competitiveness. The other end of the cable 40 is arranged outside the sheath 10 after passing through the sheath 10. The inner insulator 30 includes a main body 301 and at least one extension 302 located at the front end of the main body 301. The interiors of the main body 301 and the extension 302 are jointly provided with continuously arranged terminal mounting holes 303. The inner conductor 50 is at least partially installed in the terminal mounting hole 303. A plurality of ribs 304 are arranged on the outer peripheral wall of the extension 302 at intervals in the circumferential direction, and the ribs 304 are extended along the busbar direction of the inner insulator 30. The impedance matching performance of the inner insulator 30 is adjusted by setting the ribs 304, thereby improving the SI performance of the data transmission connector of the utility model. The characteristic impedance, return loss, insertion loss, propagation delay, LCL and LCTL parameters of the data transmission connector of the utility model are simulated respectively, wherein, Figure 6 and Figure 7 They are respectively the characteristic impedance simulation result diagram and the return loss simulation curve diagram of the data transmission connector of the utility model (other simulation diagrams are not given one by one), Figure 6 In the figure, curves S1 and S3 are respectively the upper and lower specification lines of characteristic impedance under the TC9 standard of the OPEN Alliance, and S2 is the actual characteristic impedance simulation curve of the data transmission connector of the utility model; Figure 7In the figure, curve S1 is the specification line of return loss under the TC9 standard of the OPEN Alliance, and S2 is the actual return loss simulation curve of the data transmission connector of the utility model. It has been verified that the data transmission connector provided by the utility model complies with the TC9 standard of the OPEN Alliance, that is, it meets the 100M and 1000M transmission performance requirements.

[0035] Furthermore, it can be seen from Table 1 below that Scheme 2 (adding ribs 304) improves the impedance matching contribution by 6Ω from the center value compared to Scheme 1, and Scheme 2 improves the return loss margin by -6dB compared to Scheme 1. Obviously, the impedance matching performance of the inner insulator 30 can be adjusted by setting the ribs 304, thereby improving the SI performance of the data transmission connector of the utility model.

[0036] Structure Name Characteristic impedance (spec.: 100+ / -5%Ω) Return loss (≤-30dB 1<f<190MHz, ≤-20dB, 190<f<600MHz) Solution 1: Internal Insulator 93Ω ≤-40dB f=200MHz Solution 2: Inner insulator + ribs 101Ω ≤-46dB f=200MHz

[0037] Table 1

[0038] Since the data transmission connector for transmitting differential signals is usually a two-core connector, two extension parts 302 are provided. Figure 4 The front ends of the two extensions 302 jointly form a positioning portion 309, and the interior of the extension 302 is axially penetrated with the above-mentioned terminal mounting hole 303 to accommodate the inner conductor 50, and the tail of the terminal mounting hole 303 is chamfered to facilitate the smooth installation of the cable 40; the positioning portion 309 is adapted to the shape of the cavity in the outer conductor 20, and plays a positioning role in the installation of the inner insulator 30; the positioning portion 309 and the two extensions 302 are connected by a connecting portion 310, which ensures the integrity of signal transmission while enhancing the strength of the two extensions 302 to prevent them from being damaged by assembly force.

[0039] In this embodiment, for the consideration of signal transmission impedance matching, Figure 3 As shown, the rib 304 is a long strip structure starting from the positioning portion 309 and extending along the busbar direction of the inner insulator 30. The impedance matching performance of the inner insulator 30 is adjusted by the arrangement of the rib 304, thereby improving the SI performance of the data transmission connector of the utility model. Furthermore, the main body 301, the extension portion 302, the connecting portion 310, the positioning portion 309 and the rib 304 are integrally injection molded, which can improve the strength of the inner insulator 30 on the one hand, and reduce the manufacturing cost of the inner insulator 30 on the other hand.

[0040] In one embodiment, if Figure 1-5As shown, the outer wall of the inner conductor 50 is provided with a front stop portion 501 and a rear stop portion 502 in sequence along the direction 60 in which the inner conductor is installed into the inner insulator. Correspondingly, the inner wall of the terminal mounting hole 303 is provided with a step structure 305 corresponding to the front stop portion, and a snap-in groove 306 corresponding to the rear stop portion 502. Specifically, the rear stop portion 502 is a barb structure provided on the outer wall of the inner conductor 50 protruding out, and the front stop portion 501 is an ear plate structure interfering with the step structure 305. After the inner conductor 50 is installed into the inner insulator 30, the front stop portion 501 and the rear stop portion 502 are respectively matched with the step structure 305 and the snap-in groove 306 to ensure the stability of the two after assembly. Furthermore, in this embodiment, for the consideration of signal transmission impedance matching, the snap-in groove 306 is provided through the extension portion 302 and the rib 304. For details, please refer to Figure 4 By slotting the ribs 304 , the impedance matching performance of the inner insulator 30 can be adjusted without significantly affecting the strength of the inner insulator 30 , thereby increasing the service life of the inner insulator 30 .

[0041] In one embodiment, if Figure 4 As shown, at least one positioning groove 307 is circumferentially arranged on the outer peripheral wall of the main body 301, and a piercing structure 204 matching with the positioning groove 307 is arranged on the outer conductor 20. It should be noted that the piercing structure 204 is a barb-shaped structure punched from the outside to the inside on the plate of the outer conductor 20. When the outer conductor 20 is installed on the outside of the main body 301, the piercing structure 204 is snapped into the positioning groove 307 to achieve the rear stop position of the outer conductor 20 after the outer conductor 20 and the inner insulator 30 are assembled. Furthermore, the main body 301 and the positioning portion 309 are both square, the extension portion 302 is cylindrical, and a plurality of ribs are provided. The ribs 304 are all protruding from the main body 301. The outer conductor 20 includes a first part 201 sleeved on the outside of the plurality of ribs 304 and a second part 202 sleeved on the outside of the main body 301. At least one rib 304 has a limiting surface 308 at one end facing the main body 301. An inclined surface 203 abutting against the outside of the limiting surface 308 is provided between the first part 201 and the second part 202. The inclined surface 203 cooperates with the limiting surface 308 to realize the front stop of the outer conductor 20 after the outer conductor 20 and the inner insulator 30 are assembled, so that the outer conductor 20 and the inner insulator 30 can be assembled smoothly.

[0042] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A data transmission connector, comprising, from outside to inside, a sheath, an outer conductor, an inner insulator, and an inner conductor having one end electrically connected to a cable, the other end of the cable passing through the sheath and arranged outside the sheath, characterized in that: The inner insulator includes a main body and at least one extension located at the front end of the main body. The main body and the extension are provided with continuously arranged terminal mounting holes inside. The inner conductor is at least partially installed in the terminal mounting holes. A plurality of ribs are arranged on the outer peripheral wall of the extension at intervals along the circumferential direction, and the ribs are extended along the busbar direction of the inner insulator.

2. A data transmission connector according to claim 1, characterized in that: A positioning portion is provided at the front end of the extension portion, and the rib is a long strip structure which takes the positioning portion as a starting point and extends along the busbar direction of the inner insulator.

3. A data transmission connector according to claim 2, characterized in that: The extending parts are provided with two, the front ends of the two extending parts jointly form the positioning part, and the positioning part and the two extending parts are connected by a connecting part.

4. A data transmission connector according to claim 3, characterized in that: The main body, the extending portion, the connecting portion, the positioning portion and the ribs are integrally injection-molded.

5. A data transmission connector according to claim 1, characterized in that: A front stop portion and a rear stop portion are sequentially arranged on the outer peripheral wall of the inner conductor along the direction in which the inner conductor is installed into the inner insulator. Correspondingly, a step structure corresponding to the front stop portion and a clamping groove corresponding to the rear stop portion are arranged on the inner wall of the terminal mounting hole.

6. A data transmission connector according to claim 5, characterized in that: The rear stop portion is a barb structure provided on the outer peripheral wall of the protruding inner conductor, and the front stop portion is an ear plate structure interfering with the step structure.

7. A data transmission connector according to claim 5, characterized in that: The clamping groove passes through the extending portion and the rib.

8. A data transmission connector according to claim 1, characterized in that: At least one positioning groove is arranged on the outer peripheral wall of the main body along the circumferential direction, and a piercing structure matched with the positioning groove is arranged on the outer conductor.

9. A data transmission connector according to claim 1, characterized in that: The main body and the positioning portion are both square, the extension portion is cylindrical, the plurality of ribs are protruding from the main body, the outer conductor includes a first portion sleeved on the outside of the plurality of ribs and a second portion sleeved on the outside of the main body, at least one of the ribs has a limiting surface at one end facing the main body, and an inclined surface abutting against the outside of the limiting surface is provided between the first portion and the second portion.

10. A data transmission connector according to claim 1, characterized in that: The outer conductor is formed by stamping and rolling a plate, and the connection of the plate is connected by a dovetail groove structure or / and welding.

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