Contact and its intermediate conductor

Abstract

The present invention relates to the field of connector technology, and in particular to a contact piece and its intermediate conductor. The intermediate conductor of the contact piece includes a tubular body, with plug-in contact sections extending from both ends of the tubular body. The inner cavity of the tubular body is an installation cavity for installing an inner conductor and an inner insulation. A resistor avoidance window is provided on the middle wall of the tubular body for avoiding a lead-type bypass resistor so that one end of the lead can extend into the installation cavity and connect to the inner conductor. In the axial direction, one end edge of the resistor avoidance window has a lead connection structure for connecting to the other end lead of the lead-type bypass resistor. The intermediate conductor no longer uses a switching method, which makes the structure simpler and improves reliability. Moreover, one end lead of the lead-type bypass resistor extends into the inner cavity of the intermediate conductor and is welded to the inner conductor, and the other end lead is connected to the edge of the resistor avoidance window of the intermediate conductor, which makes welding more convenient and can effectively avoid short circuits between the two lead ends.

Description

Technical Field

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

[0002] Contacts are an important component of connectors. The overall structure of existing MIL-STD-1553B contacts without resistance is as follows: Figure 1 As shown, it consists of an inner conductor 101, a left middle conductor 103, a right middle conductor 108, a left outer conductor 105, a right outer conductor 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 isolate the inner conductor 101 from the middle conductor, while the left outer insulator 102 and the right outer insulator 109 isolate the middle conductor from the outer conductor. Electrical signal transmission is primarily accomplished by the inner and middle conductors. The middle conductors consist of two parts: the left middle conductor 103 and the right middle conductor 108. The right end of the left middle conductor 103 is a pin end, while the left end of the right middle conductor 108 is a socket end. The pin end and the socket end mate to form an electrical connection.

[0003] Due to a specific purpose, a resistor with a certain resistance value needs to be connected in parallel between the inner conductor and the middle conductor, which is called a "bypass resistor". At the same time, the outer dimensions must not change, and the outer conductor must not have "windows". The current technical solution mainly considers volume limitations and chooses a chip resistor 110, such as Figure 2-3 As shown, the two lead ends of the chip resistor 110 are respectively welded to the left middle conductor 103 and the inner conductor part 101, that is, connected in parallel between the middle conductor and the inner conductor to realize the "bypass function". Since the middle conductor is transferred by two parts, the internal pin end and the socket end are plugged together to realize it, which introduces a one-time transfer, so the structure is slightly complicated and the reliability is slightly low. Moreover, since the chip resistor is very small, its two lead ends are difficult to assemble when they are welded to the middle conductor and the inner conductor respectively, and it is very easy to cause a short circuit between the two lead ends. In addition, when the middle conductor and the inner conductor are plugged together, they are subject to external force and there will be a certain amount of axial movement. The strength of the chip resistor is relatively low, which can easily cause the chip resistor itself to crack and be damaged, or cause the solder joint to become detached. Even if glue is used to fix it, it cannot be completely avoided. Summary of the Invention

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

[0005] The intermediate conductor of the contact piece of the present invention adopts the following technical solution:

[0006] The intermediate conductor of the contact piece includes a tubular body, with plug-in contact sections extending from both ends of the tubular body. The inner cavity of the tubular body is an installation cavity for installing the inner conductor and inner insulation. A resistor avoidance window is opened on the middle wall of the tubular body for avoiding the lead-type bypass resistor so that one end of the lead can extend into the installation cavity and connect to the inner conductor. In the axial direction, one end of the resistor avoidance window has a lead connection structure for connecting to the other end of the lead of the lead-type bypass resistor.

[0007] Furthermore, the lead connection structure is a wire-accommodating welding groove provided at the edge of the resistor avoidance window for the other end lead of the lead-type bypass resistor to extend into and be welded.

[0008] Furthermore, an axial stopping inner boss for axially stopping the inner insulation is provided on the cavity wall at one end of the installation cavity, and a welding hole for welding the inner insulation fixing ring is provided on the cavity wall at the other end of the installation cavity.

[0009] Furthermore, an axial stopping step surface is provided on the outer peripheral surface of the tubular body for axially stopping and limiting the external insulation.

[0010] Beneficial Effects: The intermediate conductor of the contact piece of the present invention is a groundbreaking invention. The intermediate conductor comprises a tubular body with plug-in contact sections extending from each end. The inner cavity of the tubular body is used to mount an inner conductor and inner insulation. A resistor avoidance window is provided on the central wall of the tubular body, which allows a lead-type bypass resistor to be inserted into the inner cavity of the tubular body and connected to the inner conductor. The other lead of the lead-type bypass resistor can be directly connected to the lead connection structure at the edge of the resistor avoidance window. The intermediate conductor no longer requires a transfer method, which simplifies the structure and improves reliability. Moreover, one lead of the lead-type bypass resistor can be inserted into the inner cavity of the intermediate conductor through the resistor avoidance window and welded to the inner conductor, while the other lead is located outside the intermediate conductor and directly connected to the edge of the resistor avoidance window of the intermediate conductor. The two lead ends are relatively far apart, making welding and assembly more convenient and effectively preventing short circuits between the two lead ends.

[0011] The contact element of the present invention adopts the following technical solution:

[0012] The contact piece includes a lead-type bypass resistor and an inner conductor, an inner insulation, an intermediate conductor, an outer insulation, and an outer conductor arranged radially from the inside to the outside. The intermediate conductor includes a tubular body, and plug-in contact sections extend from both ends of the tubular body. Resistor avoidance windows for avoiding the lead-type bypass resistor are opened on the middle tube wall of the tubular body and on the inner insulation. The lead-type bypass resistor is axially arranged at the resistor avoidance window, and one end of the lead is connected to the intermediate conductor, and the other end of the lead is connected to the inner conductor.

[0013] Furthermore, a wire-accommodating welding groove is provided at the edge of the resistor avoidance window on the middle wall of the tubular body, for one end of the lead-type bypass resistor to be inserted into and welded to, and a wire-inserting welding groove with an opening radially outward is provided on the inner conductor, for the other end of the lead-type bypass resistor to be inserted into and welded to.

[0014] Furthermore, the inner insulation is an axially split and interlocked sleeve structure, and the inner conductor is interlocked inside to achieve axial limitation of the inner conductor. The inner cavity of the tubular body is an installation cavity for installing the inner conductor and the inner insulation. One end of the installation cavity has an axial stopping inner boss to axially stop one end of the inner insulation. The other end of the installation cavity is installed with an inner insulation fixing ring to axially stop the other end of the inner insulation. The inner insulation fixing ring is fixedly connected to the tubular body.

[0015] Furthermore, an avoidance groove is provided on the inner conductor at a position corresponding to the resistor avoidance window to provide an accommodation space for accommodating the lead-type bypass resistor.

[0016] Furthermore, an escape cavity is provided on the outer insulation at a position corresponding to the resistor escape window to provide an accommodation space for accommodating the lead-type bypass resistor.

[0017] Furthermore, the outer insulation is an axially split and interlocked sleeve structure with the intermediate conductor interlocked therein, and an axial stop step surface is provided on the outer peripheral surface of the intermediate conductor to axially stop and limit the outer insulation.

[0018] Beneficial Effects: The contact piece of the present invention is a groundbreaking invention. The intermediate conductor itself is a single component, with resistance avoidance windows provided on both the intermediate conductor and the inner insulation. The lead-type bypass resistor is axially arranged in the resistance avoidance window, with one end of the lead connected to the intermediate conductor and the other end connected to the inner conductor. The intermediate conductor no longer uses a switching method, resulting in a simpler structure and improved signal transmission reliability. Furthermore, the lead-type bypass resistor is axially arranged along the intermediate conductor, with one end of the lead located outside the intermediate conductor and connected to the intermediate conductor, while the other end of the lead extends through the resistance avoidance window into the inner cavity of the intermediate conductor and connects to the inner conductor. The two lead ends are relatively far apart, making welding and assembly more convenient and effectively preventing short circuits between the two lead ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an existing MIL-STD-1553B contact without resistance;

[0020] Figure 2 This is a schematic diagram of the structure of the existing MIL-STD-1553B contact with built-in chip resistors;

[0021] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0022] Figure 4 Schematic diagram of the structure of a lead-type shunt resistor in an embodiment of a contact member of the present invention;

[0023] Figure 5 A schematic structural diagram of an intermediate conductor in an embodiment of a contact element of the present invention from a first perspective;

[0024] Figure 6 A schematic structural diagram of the intermediate conductor in an embodiment of the contact element of the present invention from a second perspective;

[0025] Figure 7 2 is a schematic structural diagram of the intermediate conductor in an embodiment of the contact element of the present invention from a third perspective;

[0026] Figure 8 A perspective view of an embodiment of a contact element of the present invention;

[0027] Figure 9 A front view of an embodiment of a contact member of the present invention;

[0028] Figure 10 for Figure 9 Cross-sectional view at AA in the middle;

[0029] Figure 11 for Figure 10 Cross-sectional view at the middle BB;

[0030] Figure 12 for Figure 10 Cross-sectional view at CC;

[0031] Figure 13 This is a schematic diagram of the structure where the inner conductor, inner insulation, and intermediate conductor are assembled together;

[0032] Figure 14 A cross-sectional view of the inner conductor, inner insulation, and intermediate conductor assembled together;

[0033] Figure 15 This is a schematic diagram of the structure in which a lead-type shunt resistor is assembled with an intermediate conductor, inner insulation, and inner conductor;

[0034] Figure 16A cross-sectional view of a lead-type shunt resistor assembled with an intermediate conductor, inner insulation, and inner conductor;

[0035] Figure 1-3 Center: 101, inner conductor; 102, left outer insulator; 103, left middle conductor; 104, left inner insulator; 105, left outer conductor; 106, right outer conductor; 107, right inner insulator; 108, right middle conductor; 109, right outer insulator; 110, chip resistor;

[0036] Figure 4-16 Center: 1. Left outer conductor; 2. Left outer insulation; 3. Middle conductor; 3-1. Tubular body; 3-2. Plug-in contact section; 3-3. Splitting groove; 3-4. Middle tube wall; 3-5. Wire-holding welding groove; 3-6. Axial stopping inner boss; 4. Left inner insulation; 5. Inner conductor; 5-1. Wire-holding welding groove; 5-2. Avoidance groove; 6. Lead-type bypass resistor; 6-1. Resistor base; 6-2. Lead end; 7. Right inner insulation; 8. Inner insulation fixing ring; 8-1. Stopping boss; 9. Right outer insulation; 10. Right outer conductor; 11. Welding hole; 12. Resistor avoidance window; 13. Avoidance cavity. DETAILED DESCRIPTION

[0037] The intermediate conductor of the existing MIL-STD-1553B contact with a built-in chip resistor is realized by switching between two parts. Due to the introduction of one switching, the structure is complicated and the transmission reliability is reduced. In addition, when the two lead ends of the chip resistor are respectively welded to the intermediate conductor and the inner conductor, assembly is difficult and it is very easy to cause a short circuit between the two lead ends. The present invention provides a contact, specifically a MIL-STD-1553B contact, the basic inventive concept of which is that the intermediate conductor itself is a single part, no longer using a switching method, which simplifies the structure and improves transmission reliability. The intermediate conductor has a resistance avoidance window for avoiding a lead-type bypass resistor, so that one end lead of the lead-type bypass resistor is connected to the intermediate conductor, and the other end lead can extend into the inner cavity of the intermediate conductor through the resistance avoidance window and be welded to the inner conductor. The two lead ends are far apart, making welding and assembly more convenient and effectively avoiding the short circuit between the two lead ends.

[0038] Based on the above inventive concept, the embodiments of the present invention are described in detail below.

[0039] Embodiments of the contact element of the present invention:

[0040] like Figure 8-10 As shown, the contact element of the present invention includes a lead-type shunt resistor 6 and an inner conductor 5, an inner insulation, an intermediate conductor 3, an outer insulation, and an outer conductor arranged in sequence from the inside to the outside in radial direction.

[0041] The structure of the lead-type shunt resistor 6 is as follows: Figure 4As shown, a commonly used lead-type metal film resistor includes a resistor base 6-1 and two lead ends 6-2 arranged at both axial ends of the resistor base 6-1, one of the lead ends 6-2 is cut to retain a certain length, and the other lead end 6-2 is cut to retain a certain length and bent into 90°.

[0042] The structure of the intermediate conductor 3 is as follows Figure 5-7 As shown, the tubular body 3-1 comprises a tubular main body 3-1, with plug-in contact sections 3-2 extending from each end. The plug-in contact sections 3-2 are provided with a plurality of slots 3-3 spaced circumferentially and extending axially. The inner cavity of the tubular body 3-1 serves as an installation cavity for mounting the inner conductor 5 and inner insulation. A resistor escape window 12 is provided in the central wall 3-4 of the tubular body 3-1 for accommodating the lead-type shunt resistor 6. One end of the lead-type shunt resistor 6 can pass through the resistor escape window 12 into the installation cavity and connect to the inner conductor 5. A wire-accommodating welding groove 3-5 is provided at one end edge of the resistor escape window 12 for inserting and welding the other end of the lead-type shunt resistor 6, thereby achieving connection to the intermediate conductor 3. The wire-accommodating welding groove 3-5 constitutes a lead connection structure for connecting to the other end of the lead-type shunt resistor 6. A wire-accommodating welding groove 3-5 is provided at one end of the resistor avoidance window 12. This outwardly open groove facilitates welding the leads of the lead-type bypass resistor 6, providing greater convenience and reliability. The tubular body 3-1 also has a plurality of welding holes 11, evenly spaced circumferentially. These holes 11 are used for welding the inner insulating retaining ring 8, which is fixedly mounted within the inner cavity of the tubular body 3-1 to axially secure the inner insulation.

[0043] like Figure 10-12 As shown, the inner insulation separates the inner conductor 5 from the intermediate conductor 3. A resistor relief window 12 is also provided on the inner insulation to accommodate the lead-type shunt resistor 6. One end of the lead-type shunt resistor 6 is connected to the inner conductor 5 through the intermediate conductor 3 and the resistor relief window 12 on the inner insulation. The inner conductor 5 is provided with a wire insertion welding groove 5-1, which opens radially outward. One end of the lead-type shunt resistor 6 extends into the wire insertion welding groove 5-1 and is welded to the inner conductor 5. The lead and the wire insertion welding groove 5-1 have a large circumferential welding area, ensuring a secure and reliable weld. A relief recess 5-2 is provided on the inner conductor 5 at a position corresponding to the resistor relief window 12 to provide space for the lead-type shunt resistor 6, preventing the lead-type shunt resistor 6 from occupying additional space within the contact and increasing the contact size.

[0044] The inner insulation is a sleeve-like structure that is axially split and interlocked, comprising a left inner insulation 4 and a right inner insulation 7. The left and right inner insulations 4 and 7 interlock together to enclose the inner conductor 5 and provide axial restraint for the inner conductor 5. The inner wall of the left inner insulation 4 has a rightward-facing step surface to restrain the inner conductor 5 from the left, while the inner wall of the right inner insulation 7 has a leftward-facing step surface to restrain the inner conductor 5 from the right, thereby ensuring axial restraint for the inner conductor 5.

[0045] The left end wall of the inner cavity of the intermediate conductor 3 has an axial stop inner boss 3-6, with the stop surface facing right, used to axially stop the left inner insulator 4 from the left end. An inner insulating retaining ring 8 is fixedly installed at the right end of the inner cavity of the intermediate conductor 3. A welding hole 11 is provided in the right end wall of the intermediate conductor 3, through which the inner insulating retaining ring 8 is welded to the right end wall of the inner cavity of the intermediate conductor 3. The inner cavity wall of the inner insulating retaining ring 8 has a stop boss 8-1, with the stop surface facing left, used to axially stop the right inner insulator 7 from the right end. The axial stopping inner boss 3-6 on the left end 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, and the inner insulation fixing ring 8 is welded to the intermediate conductor 3, thereby firmly fixing the positions of the inner conductor 5, inner insulation and various parts of the intermediate conductor 3, and no movement occurs.

[0046] The outer insulation is isolated between the outer conductor and the middle conductor 3. A avoidance cavity 13 is provided on the outer insulation at a position corresponding to the resistor avoidance window 12 to provide space for accommodating the lead-type bypass resistor 6, thereby preventing the lead-type bypass resistor 6 from occupying additional space inside the contact and causing the contact to increase in size. The outer insulation is an axially split, interlocking sleeve 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 interlocked and interlock the middle conductor 3 inside. The outer diameter of the middle pipe section of the middle conductor 3 is larger than the outer diameter of the pipe sections at both ends, and axial stop step surfaces facing left and right are formed at the transition connection between the middle pipe section and the pipe sections at both ends, respectively. The left axial stop step surface is used to axially limit the left outer insulation 2, and the right axial stop step surface is used to axially limit the right outer insulation 9.

[0047] The outer conductor is an axially split, interlocking sleeve-like structure, comprising a left outer conductor 1 and a right outer conductor 10. The left outer conductor 1 and the right outer conductor 10 are interlocked, and the outer insulation is interlocked inside. The left outer conductor 1 is buckled onto the outside of the left outer insulation 2. The inner cavity wall of the left outer insulation 2 has a right-facing step surface to axially limit the left outer insulation 2 from the left side. This step surface cooperates with the left-facing axial stop step surface on the intermediate conductor 3 to achieve axial limitation of the left outer insulation 2 within the outer conductor. The right outer conductor 10 is buckled onto the outside of the right outer insulation 9, and the left end of the right outer insulation 9 extends into the inner cavity of the right end of the left outer conductor 1. The left end of the right outer conductor 10 has a left-facing continuous step surface to axially limit the right outer insulation 9 from the right side. This continuous step surface cooperates with the right-facing axial stop step surface on the intermediate conductor 3 to achieve axial limitation of the right outer insulation 9 within the outer conductor. The right outer conductor 10 is inserted into the right end of the left outer conductor 1 . Four welding holes 11 are provided on the left outer conductor 1 at intervals along the circumferential direction to weld the left and right outer conductors 1 and 10 together.

[0048] When assembling the contact of the present invention, the first step is as follows: Figure 13-14 As shown, the inner conductor 5, the left inner insulation 4, the right inner insulation 7, the inner insulation fixing ring 8 and the intermediate conductor 3 are assembled together, and the inner insulation fixing ring 8 is welded and fixed to the intermediate conductor 3, thereby realizing the assembly and fixation of these parts. The positions of each part are firmly fixed and will not move.

[0049] The second step is Figure 15-16 As shown, the leads at both ends of the lead-type shunt resistor 6 are welded to the middle conductor 3 and the inner conductor 5 respectively. The operation is convenient, the welding is easy, and the welding is firm and reliable.

[0050] The third step, such as Figure 10 As shown, the left outer conductor 1, the left outer insulation 2, the right outer insulation 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, and the assembly of all parts is completed.

[0051] The intermediate conductor 3 of the contact of the present invention is an integrated structure composed of one part. It no longer uses a switching method, so the structure is simpler and the transmission reliability is improved. A resistance avoidance window 12 is provided on the intermediate conductor 3, and the lead-type bypass resistor 6 is arranged axially at the resistance avoidance port. One end of the lead is welded to the intermediate conductor 3, and the other end of the lead can be extended into the inner cavity of the intermediate conductor 3 through the resistance avoidance window 12 and welded to the inner conductor 5. The leads at both ends are easy to weld and are far apart, making welding and assembly more convenient and effectively avoiding the short circuit of the two lead ends 6-2. In addition, the positions of the various parts of the contact are firmly fixed, and the intermediate conductor 3 and the inner conductor 5 will not move axially when they are plugged in and used, thereby ensuring that the solder joints of the lead-type bypass resistor 6 and the intermediate conductor 3 and the inner conductor 5 are not easily detached, ensuring the stability and reliability of the "bypass function".

[0052] Of course, the contact element of the present invention is not limited to the implementation methods in the above embodiments.

[0053] For example, in another embodiment, an axially extending wire insertion welding hole is provided at one end of the resistor avoidance window of the intermediate conductor to allow one end of the lead of the lead-type shunt resistor to be inserted and welded. In this case, the wire insertion welding hole constitutes the lead connection structure of the intermediate conductor. Alternatively, one end of the lead-type shunt resistor can be directly welded to the edge of the resistor avoidance window. Similarly, the wire insertion welding groove can be omitted on the inner conductor, and the other end of the lead-type shunt resistor can be directly welded to the outer surface of the inner conductor.

[0054] For example, in another embodiment, an inner insulating fixing ring is welded and fixed at the left and right ends of the installation cavity of the intermediate conductor to axially block the inner insulation from both ends to prevent the intermediate conductor and the inner conductor from axial movement.

[0055] For example, in another embodiment, no avoidance groove is provided on the inner conductor. In this case, in order 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 be slightly increased.

[0056] For example, in another embodiment, no avoidance cavity for accommodating the lead-type bypass resistor is provided on the outer insulation. In this case, in order to accommodate the lead-type bypass resistor, the radial dimension of the outer insulation will increase, and the overall dimension of the contact will increase slightly.

[0057] For example, in another embodiment, there is no axial stopping step surface on the outer circumference of the intermediate conductor. Instead, a limiting ring is fixedly mounted on the outside of the intermediate conductor to provide axial stopping and limiting for the external insulation via the limiting ring.

[0058] The present invention further provides an embodiment of an intermediate conductor of a contact piece, the specific structure of which is the same as the structure of the intermediate conductor in the embodiment of the contact piece of the present invention described above, and will not be described in detail here.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A contact member, characterized by: The invention comprises a lead-type bypass resistor (6) and an inner conductor (5), an inner insulation, an intermediate conductor (3), an outer insulation, and an outer conductor arranged radially from the inside to the outside. The intermediate conductor (3) comprises a tubular body (3-1). The inner cavity of the tubular body (3-1) is an installation cavity for installing the inner conductor (5) and the inner insulation. Plug-in contact sections (3-2) extend from both ends of the tubular body (3-1). A resistor avoidance window (12) for avoiding the lead-type bypass resistor (6) is provided on the middle wall (3-4) of the tubular body (3-1) and the inner insulation. The lead-type bypass resistor (6) is axially arranged at the resistor avoidance window (12), and one end of the lead is connected to the intermediate conductor (3), and the other end of the lead is connected to the inner conductor (5). One end of the installation inner cavity is provided with an axially stopping inner boss (3-6) for axially stopping one end of the inner insulation, and the other end of the installation inner cavity is provided with an inner insulation fixing ring (8) for axially stopping the other end of the inner insulation, and the inner insulation fixing ring (8) is fixedly connected to the tubular body (3-1); or, an inner insulation fixing ring is respectively welded and fixed at the left and right ends of the installation inner cavity to axially stop the inner insulation from both ends.

2. The contact according to claim 1, wherein: A wire-accommodating welding groove (3-5) is provided at the edge of the resistance avoidance window (12) on the middle wall (3-4) of the tubular body (3-1), for inserting a lead wire of a lead-type bypass resistor (6) into and welding the lead wire into the groove, and a wire-inserting welding groove (5-1) with an opening radially outward is provided on the inner conductor (5), for inserting a lead wire of the other end of the lead-type bypass resistor (6) into and welding the lead wire into the groove.

3. The contact according to claim 1 or 2, characterized in that: The inner insulation is an axially split, interlocked sleeve-like structure, and the inner conductor (5) is interlocked therein to achieve axial positioning of the inner conductor (5).

4. The contact according to claim 1 or 2, characterized in that: An avoidance groove (5-2) is provided on the inner conductor (5) at a position corresponding to the resistor avoidance window (12) to provide an accommodation space for accommodating the lead-type bypass resistor (6).

5. The contact according to claim 1 or 2, characterized in that: A bypass cavity (13) is provided on the outer insulation at a position corresponding to the resistor bypass window (12) to provide an accommodation space for accommodating the lead-type bypass resistor (6).

6. The contact according to claim 1 or 2, characterized in that: The outer insulation is an axially split, interlocked sleeve-like structure with the intermediate conductor (3) interlocked therein, and an axial stop step surface is provided on the outer peripheral surface of the intermediate conductor (3) to axially stop and limit the outer insulation.

7. The intermediate conductor of the contact piece is characterized by: The invention comprises a tubular body (3-1), with plug-in contact sections (3-2) extending from both ends of the tubular body (3-1), an inner cavity of the tubular body (3-1) being an installation cavity for installing an inner conductor (5) and an inner insulation, a resistor avoidance window (12) for avoiding a lead-type bypass resistor (6) so that one end of the lead can extend into the installation cavity and be connected to the inner conductor (5) is provided on a middle wall (3-4) of the tubular body (3-1), and in an axial direction, a lead connection structure is provided along one end of the resistor avoidance window (12) for connecting to the other end of the lead-type bypass resistor (6).

8. The intermediate conductor of the contact according to claim 7, characterized in that: The lead connection structure is a wire-accommodating welding groove (3-5) provided at the edge of the resistor avoidance window (12) for the other end lead of the lead-type bypass resistor (6) to extend into and be welded.

9. The intermediate conductor of the contact according to claim 7 or 8, characterized in that: An axial stop inner boss (3-6) for axially stopping the inner insulation is provided on a cavity wall at one end of the installation cavity, and a welding hole (11) for welding the inner insulation fixing ring (8) is provided on a cavity wall at the other end of the installation cavity.

10. The intermediate conductor of the contact according to claim 7 or 8, characterized in that: An axial stop step surface is provided on the outer peripheral surface of the tubular body (3-1) for axially stopping and limiting external insulation.

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