Contact and intermediate conductor thereof

Abstract

The invention relates to the technical field of connectors, in particular to a contact and an intermediate conductor thereof. A middle conductor of the contact piece comprises a tubular main body, two ends of the tubular main body respectively extend to form plugging contact sections, and an inner cavity of the tubular main body is an installation inner cavity used for installing an inner conductor and an inner insulator. A resistor avoiding window used for avoiding the lead type bypass resistor so that a lead at one end of the resistor can stretch into the installation inner cavity and be connected with the inner conductor is formed in the middle pipe wall of the tubular body, and a lead connecting structure used for being connected with a lead at the other end of the lead type bypass resistor is arranged on one port edge of the resistor avoiding window in the axial direction. The intermediate conductor does not adopt a switching mode any more, so that the structure is simpler, and the reliability is improved; and the lead at one end of the lead-type bypass resistor extends into the inner cavity of the middle conductor and is welded with the inner conductor, and the lead at the other end is connected to the edge of the resistor avoiding window of the middle conductor, so that the welding is more convenient, and the short circuit condition of the two lead ends can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and particularly to a contact member and an intermediate conductor thereof. Background Art

[0002] A contact member is an important component of a connector. The overall structure of an existing resistorless MIL-STD-1553B contact member is as Figure 1 shown. It is composed of an inner conductor member 101, a left intermediate conductor 103, a right intermediate conductor 108, a left outer conductor member 105, a right outer conductor member 106, a left inner insulator 104, a right inner insulator 107, a left outer insulator 102, and a right outer insulator 109. The left inner insulator 104 and the right inner insulator 107 are isolated between the inner conductor member 101 and the intermediate conductor, and the left outer insulator 102 and the right outer insulator 109 are isolated between the intermediate conductor and the outer conductor. The transmission of electrical signals is mainly completed by the inner conductor and the intermediate conductor. The intermediate conductor is composed of two parts, namely a left intermediate conductor 103 and a right intermediate conductor 108. The right end of the left intermediate conductor 103 is a pin end, and the left end of the right intermediate conductor 108 is a jack end. The pin end and the jack end are inserted into each other to form an electrical connection.

[0003] Due to a certain specific use, it is necessary to connect a resistor with a certain resistance value in parallel between the inner conductor and the intermediate conductor, which is called a "bypass resistor". At the same time, it is required that the external dimensions do not change and the outer conductor does not have a "window". The current technical solution mainly considers the volume limitation and selects a chip resistor 110. As Figures 2-3 shown, the two lead ends of the chip resistor 110 are respectively welded to the left intermediate conductor 103 and the inner conductor member 101, that is, connected in parallel between the intermediate conductor and the inner conductor to achieve the "bypass function". Since the intermediate conductor is realized by the connection of two parts, and the internal pin end and jack end are inserted into each other, one connection is introduced, so the structure is slightly complex and the reliability is slightly low. Moreover, since the chip resistor is very small, it is difficult to assemble when its two lead ends are respectively welded to the intermediate conductor and the inner conductor, and it is extremely easy to cause a short circuit between the two lead ends. In addition, when the intermediate conductor and the inner conductor are inserted and used, under the action of external force, there will be a certain amount of axial movement. The strength of the chip resistor is relatively low, which is extremely easy to cause cracks in the chip resistor itself and damage, or cause the solder joints to come off. Even if glue is used for fixing, it cannot be completely avoided. Summary of the Invention

[0004] The purpose of the present invention is to provide an intermediate conductor of a contact member to solve the problem that the intermediate conductor of the existing MIL-STD-1553B contact member is realized by the connection of two parts, with a complex structure and low reliability; the purpose of the present invention is also to provide a contact member to solve the problem that the signal transmission reliability of the contact member is reduced due to the complex structure and low reliability of the intermediate conductor of the existing MIL-STD-1553B contact member.

[0005] The following technical solution is adopted for the intermediate conductor of the contact of the present invention: The intermediate conductor of the contact includes a tubular main body. Plugging contact segments respectively extend from both ends of the tubular main body. The inner cavity of the tubular main body is an installation inner cavity for installing an inner conductor and inner insulation. A resistance avoidance window for avoiding a lead type bypass resistor is formed in the middle pipe wall of the tubular main body, so that one end lead of the resistor can extend into the installation inner cavity and be connected with the inner conductor. In the axial direction, one port edge of the resistance avoidance window has a lead connection structure for connecting with the other end lead of the lead type bypass resistor.

[0006] Further, the lead connection structure is a wire receiving and welding groove formed at the port edge of the resistance avoidance window for the other end lead of the lead type bypass resistor to extend into and be welded.

[0007] Further, an axial stop inner boss for axially stopping the inner insulation is provided on one end cavity wall of the installation inner cavity, and a welding hole for welding an inner insulation fixing ring is provided on the other end cavity wall of the installation inner cavity.

[0008] Further, an axial stop step surface for axially stopping and limiting the outer insulation is provided on the outer peripheral surface of the tubular main body.

[0009] Beneficial effects: The intermediate conductor of the contact of the present invention is a pioneering invention. The intermediate conductor includes a tubular main body. Plugging contact segments respectively extend from both ends of the tubular main body. The inner cavity of the tubular main body is used for installing an inner conductor and inner insulation. A resistance avoidance window is formed in the middle pipe wall of the tubular main body, which can avoid the lead type bypass resistor and allow one end lead of the resistor to extend into the inner cavity of the tubular main body and be connected with the inner conductor. The other end lead of the lead type bypass resistor can be directly connected to the lead connection structure at the port edge of the resistance avoidance window. The intermediate conductor no longer adopts a transfer mode, the structure is simpler, and the reliability is improved; moreover, one end lead of the lead type bypass resistor can extend into the inner cavity of the intermediate conductor through the resistance avoidance window and be welded to the inner conductor, and the other end lead is outside the intermediate conductor and is directly connected to the port edge of the resistance avoidance window of the intermediate conductor. The two lead ends are far apart, so the welding and assembly are more convenient, and the short circuit of the two lead ends can be effectively avoided.

[0010] The following technical solution is adopted for the contact of the present invention: The contact includes a lead type bypass resistor and an inner conductor, inner insulation, intermediate conductor, outer insulation, and outer conductor that are sequentially arranged from the inside to the outside in the radial direction. The intermediate conductor includes a tubular main body. Plugging contact segments respectively extend from both ends of the tubular main body. Resistance avoidance windows for avoiding the lead type bypass resistor are formed on both the middle pipe wall of the tubular main body and the inner insulation. The lead type bypass resistor is axially arranged at the resistance avoidance window, and one end lead is connected with the intermediate conductor, and the other end lead is connected with the inner conductor.

[0011] Further, a wire - receiving welding groove is provided at the edge of the resistance - avoiding window on the middle wall of the tubular body for one end lead of the lead - type bypass resistor to extend into and be welded, and an insertion - wire welding groove with an opening radially outward is provided on the inner conductor for the other end lead of the lead - type bypass resistor to extend into and be welded.

[0012] Further, the inner insulation is an axially - split and butted sleeve - like structure that butts the inner conductor inside and realizes axial limitation of the inner conductor. The inner cavity of the tubular body is an installation inner cavity for installing the inner conductor and the inner insulation. One end of the installation inner cavity has an axially - stopping inner boss to axially stop one end of the inner insulation, and an inner - insulation fixing ring is installed at the other end of the installation inner cavity to axially stop the other end of the inner insulation. The inner - insulation fixing ring is fixedly connected to the tubular body.

[0013] Further, an avoidance sink is provided on the inner conductor at a position corresponding to the resistance - avoiding window to provide a receiving space for the lead - type bypass resistor.

[0014] Further, an avoidance cavity is provided on the outer insulation at a position corresponding to the resistance - avoiding window to provide a receiving space for the lead - type bypass resistor.

[0015] Further, the outer insulation is an axially - split and butted sleeve - like structure that butts the intermediate conductor inside. An axially - stopping step surface is provided on the outer peripheral surface of the intermediate conductor to axially stop and limit the outer insulation.

[0016] Beneficial effects: The contact of the present invention is a pioneering invention. The intermediate conductor is itself a part. Resistance - avoiding windows are provided on both the intermediate conductor and the inner insulation. The lead - type bypass resistor is axially arranged at the resistance - avoiding window, and one end lead is connected to the intermediate conductor, and the other end lead is connected to the inner conductor. The intermediate conductor no longer adopts a transfer method, the structure is simpler, and the signal transmission reliability is improved; moreover, the lead - type bypass resistor is axially arranged along the intermediate conductor, one end lead is outside the intermediate conductor and is connected to the intermediate conductor, and the other end lead extends into the inner cavity of the intermediate conductor through the resistance - avoiding window and is connected to the inner conductor. The two lead ends are far apart, so the welding and assembly are more convenient, and the short - circuit situation between the two lead ends can be effectively avoided. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an existing MIL - STD - 1553B contact without a resistor; Figure 2 It is a schematic structural diagram of an existing MIL - STD - 1553B contact with an embedded chip resistor; Figure 3 For Figure 2 The cross - sectional view taken along A - A in Figure 4Schematic structural diagram of the lead-type bypass resistor in the embodiment of the contact of the present invention; Figure 5 Schematic structural diagram of the middle conductor from the first perspective in the embodiment of the contact of the present invention; Figure 6 Schematic structural diagram of the middle conductor from the second perspective in the embodiment of the contact of the present invention; Figure 7 Schematic structural diagram of the middle conductor from the third perspective in the embodiment of the contact of the present invention; Figure 8 Stereogram of the embodiment of the contact of the present invention; Figure 9 Front view of the embodiment of the contact of the present invention; Figure 10 is Figure 9 Cross-sectional view taken along line A-A in Figure 11 is Figure 10 Cross-sectional view taken along line B-B in Figure 12 is Figure 10 Cross-sectional view taken along line C-C in Figure 13 Schematic structural diagram of the inner conductor, inner insulation, and middle conductor assembled together; Figure 14 Cross-sectional view of the inner conductor, inner insulation, and middle conductor assembled together; Figure 15 Schematic structural diagram of the lead-type bypass resistor assembled with the middle conductor, inner insulation, and inner conductor; Figure 16 Cross-sectional view of the lead-type bypass resistor assembled with the middle conductor, inner insulation, and inner conductor; Figures 1-3 In which: 101, inner conductor part; 102, left outer insulator; 103, left middle conductor; 104, left inner insulator; 105, left outer conductor part; 106, right outer conductor part; 107, right inner insulator; 108, right middle conductor; 109, right outer insulator; 110, chip resistor; Figures 4-16 In which: 1, left outer conductor; 2, left outer insulation; 3, middle conductor; 3-1, tubular main body; 3-2, plug-in contact section; 3-3, split groove; 3-4, middle tube wall; 3-5, wire-receiving welding groove; 3-6, axial stop inner boss; 4, left inner insulation; 5, inner conductor; 5-1, wire-inserting welding groove; 5-2, avoidance sink; 6, lead-type bypass resistor; 6-1, resistor matrix; 6-2, lead end; 7, right inner insulation; 8, inner insulation fixing ring; 8-1, stop boss; 9, right outer insulation; 10, right outer conductor; 11, welding hole; 12, resistor avoidance window; 13, avoidance cavity. Detailed implementation manners

[0018] The middle conductor of the existing MIL-STD-1553B contact with built-in chip resistors is realized by transferring two parts. Due to the introduction of one transfer, the structure is complex, the transmission reliability is reduced, and when the two lead ends of the chip resistor are welded to the middle conductor and the inner conductor respectively, the assembly is difficult and it is extremely easy to cause a short circuit between the two lead ends. The present invention provides a contact, specifically an MIL-STD-1553B contact. The basic inventive concept is that the middle conductor itself is a single part, and the transfer method is no longer adopted, which simplifies the structure and improves the transmission reliability. Moreover, the middle conductor has a resistance avoidance window for avoiding the lead type bypass resistor, so that one lead of one end of the lead type bypass resistor is connected to the middle conductor, and the other lead can extend into the inner cavity of the middle conductor through the resistance avoidance window and be welded to the inner conductor. The two lead ends are far apart, making the welding assembly more convenient and effectively avoiding the short circuit between the two lead ends.

[0019] Based on the above inventive concept, the embodiments of the present invention are introduced in detail below.

[0020] Embodiment of the contact of the present invention: As Figures 8-10 shown, the contact of the present invention includes a lead type bypass resistor 6 and an inner conductor 5, an inner insulation, a middle conductor 3, an outer insulation, and an outer conductor that are sequentially arranged radially from the inside out.

[0021] Among them, the structure of the lead type bypass resistor 6 is as Figure 4 shown, which is a common lead type metal film resistor, including a resistor substrate 6-1 and two lead ends 6-2 arranged at both axial ends of the resistor substrate 6-1. One of the lead ends 6-2 is cut and reserved with a certain length, and the other lead end 6-2 is cut and reserved with a certain length and bent at 90°.

[0022] The structure of the middle conductor 3 is as Figures 5-7As shown in the figure, it includes a tubular body 3-1. Plugging contact segments 3-2 extend from both ends of the tubular body 3-1 respectively. A plurality of split grooves 3-3 are arranged at intervals in the circumferential direction and extend axially on the plugging contact segments 3-2. The inner cavity of the tubular body 3-1 is an installation inner cavity for installing an inner conductor 5 and inner insulation. A resistance avoidance window 12 for avoiding a leaded bypass resistor 6 is formed in the middle tube wall 3-4 of the tubular body 3-1. One end lead of the leaded bypass resistor 6 can extend into the installation inner cavity through the resistance avoidance window 12 and be connected to the inner conductor 5. In the axial direction, a wire receiving and welding groove 3-5 is formed at one port edge of the resistance avoidance window 12 for the other end lead of the leaded bypass resistor 6 to extend into and be welded, so as to realize the connection with the intermediate conductor 3. The wire receiving and welding groove 3-5 constitutes a lead connection structure for connecting with the other end lead of the leaded bypass resistor 6. The wire receiving and welding groove 3-5 is formed at one port edge of the resistance avoidance window 12. The wire receiving and welding groove 3-5 is an outwardly open groove with the groove opening facing outwards, which can make the welding of the lead of the leaded bypass resistor 6 easier, the operation more convenient, and the welding reliable. A plurality of welding holes 11 are also provided on the tube wall of the tubular body 3-1. The plurality of welding holes 11 are evenly distributed at intervals in the circumferential direction. The welding holes 11 are used for welding an inner insulation fixing ring 8. The inner insulation fixing ring 8 is fixedly installed in the inner cavity of the tubular body 3-1 to axially fix the inner insulation.

[0023] As Figures 10-12 shown in the figure, the inner insulation is isolated between the inner conductor 5 and the intermediate conductor 3. A resistance avoidance window 12 for avoiding the leaded bypass resistor 6 is also formed on the inner insulation. One end lead of the leaded bypass resistor 6 is connected to the inner conductor 5 through the resistance avoidance windows 12 on the intermediate conductor 3 and the inner insulation. An insertion wire welding groove 5-1 with an opening facing radially outwards is provided on the inner conductor 5. One end lead of the leaded bypass resistor 6 extends into the insertion wire welding groove 5-1 and is welded. The lead and the insertion wire welding groove 5-1 have a large welding area in the circumferential direction, and the welding is firm and reliable. An avoidance sink 5-2 is provided on the inner conductor 5 at a position corresponding to the resistance avoidance window 12 to provide a receiving space for the leaded bypass resistor 6, so as to prevent the leaded bypass resistor 6 from additionally occupying the internal space of the contact part and causing the volume of the contact part to increase.

[0024] The inner insulation is an axially split and snap-fitting sleeve structure, including a left inner insulation 4 and a right inner insulation 7. The left inner insulation 4 and the right inner insulation 7 are snap-fitted to snap-fit the inner conductor 5 inside and realize the axial limit of the inner conductor 5. A limiting step surface facing right is provided on the inner cavity wall of the left inner insulation 4 to form a limit on the inner conductor 5 from the left side. A limiting step surface facing left is provided on the inner cavity wall of the right inner insulation 7 to form a limit on the inner conductor 5 from the right side, so as to realize the axial limit of the inner conductor 5.

[0025] On the left end cavity wall of the inner cavity of the intermediate conductor 3, there is an axially stopping inner boss 3-6. The stopping surface of the axially stopping inner boss 3-6 faces rightward and is used to axially stop the left inner insulation 4 from the left end. An inner insulation fixing ring 8 is fixedly installed at the right end in the inner cavity of the intermediate conductor 3. A welding hole 11 is provided on the right end pipe wall of the intermediate conductor 3, and the inner insulation fixing ring 8 is welded and fixed on the right end cavity wall of the inner cavity of the intermediate conductor 3 through the welding hole 11. On the inner cavity wall of the inner insulation fixing ring 8, there is a stopping boss 8-1. The stopping surface of the stopping boss 8-1 faces leftward and is used to axially stop the right inner insulation 7 from the right end. The axially stopping inner boss 3-6 on the left end cavity wall of the inner cavity of the intermediate conductor 3 axially stops the inner insulation from the left end, and the inner insulation fixing ring 8 axially stops the inner insulation from the right end. Moreover, the inner insulation fixing ring 8 is welded to the intermediate conductor 3, thereby firmly fixing the positions of the inner conductor 5, the inner insulation, and each part of the intermediate conductor 3, and preventing them from moving.

[0026] The outer insulation is isolated between the outer conductor and the intermediate conductor 3. An avoidance cavity 13 is provided on the outer insulation at the position corresponding to the resistance avoidance window 12 to provide a accommodating space for the lead type bypass resistor 6, and to prevent the lead type bypass resistor 6 from additionally occupying the internal space of the contact and causing the volume of the contact to increase. The outer insulation is an axially split and buckled sleeve-like structure, including a left outer insulation 2 and a right outer insulation 9. The left outer insulation 2 and the right outer insulation 9 are buckled and buckle the intermediate conductor 3 inside. The outer diameter of the middle pipe section of the intermediate conductor 3 is larger than the outer diameters of the two end pipe sections, and axially stopping step surfaces facing left and right are respectively formed at the transition joints between the middle pipe section and the two end pipe sections. Among them, the axially stopping step surface facing left is used to axially limit the left outer insulation 2, and the axially stopping step surface facing right is used to axially limit the right outer insulation 9.

[0027] The outer conductor is an axially split and buckled sleeve-like structure, including a left outer conductor 1 and a right outer conductor 10. The left outer conductor 1 and the right outer conductor 10 are buckled and buckle the outer insulation inside. The left outer conductor 1 is buckled outside the left outer insulation 2. There is a step surface facing right on the inner cavity wall of the left outer insulation 2 to axially limit the left outer insulation 2 from the left side. This step surface cooperates with the axially stopping step surface facing left on the intermediate conductor 3 to achieve axial limiting of the left outer insulation 2 inside the outer conductor. The right outer conductor 10 is buckled outside the right outer insulation 9, and the left end of the right outer insulation 9 extends into the right end inner cavity of the left outer conductor 1. The left end of the right outer conductor 10 has a continuous step surface facing left to axially limit the right outer insulation 9 from the right side. This continuous step surface cooperates with the axially stopping step surface facing right on the intermediate conductor 3 to achieve axial limiting of the right outer insulation 9 inside the outer conductor. The right outer conductor 10 is inserted into the right end inside of the left outer conductor 1. Four welding holes 11 are provided at intervals in the circumferential direction on the left outer conductor 1 to weld the left outer conductor 1 and the right outer conductor 10 together.

[0028] When assembling the contact of the present invention, in the first step, asFigures 13-14 As shown, the inner conductor 5, the left inner insulator 4, the right inner insulator 7, the inner insulator fixing ring 8 and the intermediate conductor 3 are assembled together, and the inner insulator fixing ring 8 is welded and fixed to the intermediate conductor 3, thereby realizing the assembly and fixation of these parts. The positions of all parts are firmly fixed and there will be no displacement.

[0029] The second step, as Figures 15-16 shown, the two leads at both ends of the lead-type bypass resistor 6 are respectively welded to the intermediate conductor 3 and the inner conductor 5. The operation is convenient, the welding is easy, and the welding is firm and reliable.

[0030] The third step, as Figure 10 shown, the left outer conductor 1, the left outer insulator 2, the right outer insulator 9, and the right outer conductor 10 are combined, and the left outer conductor 1 and the right outer conductor 10 are welded together. The welding is firm and reliable. Thus, the assembly of all parts is completed.

[0031] The intermediate conductor 3 of the contact of the present invention is an integrated structure composed of one part itself, and the transfer method is no longer adopted, so the structure is simpler and the transmission reliability is improved. A resistor avoidance window 12 is provided on the intermediate conductor 3. The lead-type bypass resistor 6 is axially arranged at the resistor avoidance port. One end lead thereof is welded and connected to the intermediate conductor 3, and the other end lead can extend into the inner cavity of the intermediate conductor 3 through the resistor avoidance window 12 and is welded and connected to the inner conductor 5. The welding of the two end leads is easy and the distance between them is far, making the welding and assembly more convenient and effectively avoiding the short circuit of the two lead ends 6-2. In addition, the positions of all parts of the contact are firmly fixed. When the intermediate conductor 3 and the inner conductor 5 are used in butt joint, there will be no axial displacement, thus ensuring that the solder joints of the lead-type bypass resistor 6 with the intermediate conductor 3 and the inner conductor 5 are not easily disconnected and ensuring the stable and reliable "bypass function".

[0032] Of course, the contact of the present invention is not limited to the implementation manners in the above embodiments.

[0033] For example, in another implementation manner, an axially extending wire insertion welding hole is opened at one port edge of the resistor avoidance window of the intermediate conductor for one end lead of the lead-type bypass resistor to extend into and be welded and connected. At this time, the wire insertion welding hole constitutes the lead connection structure of the intermediate conductor; or, one end lead of the lead-type bypass resistor is directly welded at the port edge of the resistor avoidance window. Similarly, the inner conductor may not be provided with a wire insertion welding groove, and the other end lead of the lead-type bypass resistor is directly welded on the outer side surface of the inner conductor.

[0034] For example, in another implementation manner, an inner insulator fixing ring is welded and fixed at both the left and right ends in the installation inner cavity of the intermediate conductor to axially block the inner insulator from both ends and prevent the intermediate conductor and the inner conductor from having axial displacement.

[0035] For example, in another embodiment, there is no relief groove provided on the inner conductor. In this case, to accommodate the lead type bypass resistor, more installation space needs to be reserved inside the contact, and the overall size of the contact will increase slightly.

[0036] For example, in another embodiment, there is no relief cavity provided on the outer insulation for accommodating the lead type bypass resistor. In this case, to accommodate the lead type bypass resistor, the radial dimension of the outer insulation will increase, and the overall size of the contact will increase slightly.

[0037] For example, in another embodiment, there is no axial stop step surface on the outer peripheral surface of the intermediate conductor. Instead, a limit ring is fixedly sleeved outside the intermediate conductor, and the outer insulation is axially stopped and limited by the limit ring.

[0038] The present invention also provides an embodiment of the intermediate conductor of the contact. Its specific structure is the same as that of the intermediate conductor in the embodiment of the contact of the present invention described above, and will not be elaborated here.

[0039] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. All equivalent structural changes made by using the content of the specification and drawings of the present invention should, by the same token, be included in the protection scope of the present invention.

Claims

1. Intermediate conductor of a contact member, characterized in that: It includes a tubular body (3-1). Plugging contact sections (3-2) extend from both ends of the tubular body (3-1). The inner cavity of the tubular body (3-1) is an installation inner cavity for installing an inner conductor (5) and inner insulation. A resistance avoidance window (12) is formed on the middle pipe wall (3-4) of the tubular body (3-1) for avoiding a leaded bypass resistor (6) so that one end lead of the resistor can extend into the installation inner cavity and be connected to the inner conductor (5). In the axial direction, one port edge of the resistance avoidance window (12) has a lead connection structure for connecting to the other end lead of the leaded bypass resistor (6).

2. The intermediate conductor of the contact according to claim 1, characterized in that: The lead connection structure is a wire-receiving welding groove (3-5) formed at the edge of the resistance avoidance window (12) for the other end lead of the leaded bypass resistor (6) to extend into and be welded.

3. The intermediate conductor of the contact according to claim 1 or 2, characterized in that: An axial stop inner boss (3-6) for axially stopping the inner insulation is provided on one end wall of the installation inner cavity, and a welding hole (11) for welding an inner insulation fixing ring (8) is provided on the other end wall of the installation inner cavity.

4. The intermediate conductor of the contact according to claim 1 or 2, characterized in that: An axial stop step surface for axially stopping and limiting the outer insulation is provided on the outer peripheral surface of the tubular body (3-1).

5. Contact, characterized in that: It includes a leaded bypass resistor (6) and an inner conductor (5), inner insulation, an intermediate conductor (3), outer insulation, and an outer conductor that are sequentially arranged radially from the inside out. The intermediate conductor (3) includes a tubular body (3-1). Plugging contact sections (3-2) extend from both ends of the tubular body (3-1). Resistance avoidance windows (12) for avoiding the leaded bypass resistor (6) are formed on both the middle pipe wall (3-4) of the tubular body (3-1) and the inner insulation. The leaded bypass resistor (6) is axially arranged at the resistance avoidance window (12), and one end lead is connected to the intermediate conductor (3), and the other end lead is connected to the inner conductor (5).

6. The contact according to claim 5, characterized in that: A wire-receiving welding groove (3-5) is provided at the edge of the resistance avoidance window (12) on the middle pipe wall (3-4) of the tubular body (3-1) for the one end lead of the leaded bypass resistor (6) to extend into and be welded. An insertion wire welding groove (5-1) with an opening radially outward is provided on the inner conductor (5) for the other end lead of the leaded bypass resistor (6) to extend into and be welded.

7. The contact according to claim 5 or 6, characterized in that: The inner insulation is an axially split and snap-fitting sleeve structure that snap-fits the inner conductor (5) inside and realizes axial limitation of the inner conductor (5). The inner cavity of the tubular body (3-1) is an installation inner cavity for installing the inner conductor (5) and the inner insulation. One end of the installation inner cavity has an axial stop inner boss (3-6) to axially stop one end of the inner insulation, and an inner insulation fixing ring (8) is installed at the other end of the installation inner cavity to axially stop the other end of the inner insulation. The inner insulation fixing ring (8) is fixedly connected to the tubular body (3-1).

8. The contact according to claim 5 or 6, characterized in that: An avoidance sink (5-2) is provided on the inner conductor (5) at a position corresponding to the resistance avoidance window (12) to provide a accommodation space for the leaded bypass resistor (6).

9. The contact according to claim 5 or 6, characterized in that: An avoidance cavity (13) is provided on the outer insulation at a position corresponding to the resistance avoidance window (12) to provide a accommodation space for the leaded bypass resistor (6).

10. The contact according to claim 5 or 6, characterized in that: The outer insulation is a sleeve-like structure that is axially split and buckled, and buckles the intermediate conductor (3) inside. The outer circumferential surface of the intermediate conductor (3) has an axial stop step surface to axially stop and limit the outer insulation.

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