A quick-plug radio frequency coaxial connector

Abstract

The application relates to the technical field of radio frequency signal transmission, in particular to a fast-plug type radio frequency coaxial connector which comprises an inner conductor and an outer conductor, the inner conductor is composed of a first inner conductor and a second inner conductor which are axially inserted and matched, the outer conductor is composed of a first outer conductor and a second outer conductor which are axially inserted and matched, the first inner conductor and the first outer conductor and the second inner conductor and the second outer conductor are respectively connected with a first insulating support and a second insulating support, meanwhile, a sealed cavity is formed between the first insulating support, the second insulating support and the inner wall of the outer conductor, and the inserted end of the inner conductor is located in the sealed cavity. The application achieves the technical effects of improving the connection stability and reliability of the connector, optimizing the radio frequency transmission performance and facilitating the connection and positioning with other components.

Description

Technical Field

[0001] This application relates to the field of radio frequency signal transmission technology, and in particular to a quick-connect radio frequency coaxial connector. Background Technology

[0002] In the field of communication technology, the transmission of high-power radio frequency (RF) signals is crucial. It is widely used in various communication devices and systems, playing a key role in ensuring the stability and efficiency of communication. With the continuous development of communication technology, the demand for high-power RF signal transmission is also increasing, bringing significant value and positive impact in improving communication quality and expanding communication coverage. In some large communication base stations and broadcast transmission equipment systems, stable transmission of high-power RF signals is the foundation for achieving high-quality communication and broadcasting. At the same time, with the increasing integration of equipment, higher requirements are placed on the performance and ease of installation and maintenance of high-power RF signal transmission connectors.

[0003] When transmitting high-power radio frequency signals between two power combiners, there are generally two common connection methods. One method involves connecting the input and output ports of the two power combiners using cables or coaxial hard-feed connections. This method is common in many communication devices and can achieve a certain degree of stable signal transmission. The other method involves directly mating the input and output ports of the two power combiners, with the inner conductors of the two ports connected by plugs, and the outer conductors connected by clamps and then secured with hose clamps. For a long time, these two methods were the main means of solving the signal transmission connection problem between power combiners and were widely used in the communications industry.

[0004] However, the two connection methods mentioned above for transmitting high-power signals have significant drawbacks. When designing the overall layout, prerequisites for installation and maintenance must be reserved within the chassis, such as the space required for the movement path of maintenance tools when installing or removing the connection ports, and the space required for personnel to move their body parts when using tools to install and maintain the connection ports. Furthermore, the installation and removal at the two ports takes a relatively long time, increasing the difficulty of electrical design. In addition, the overall design layout imposes stringent requirements on the positional distances between synthesizers and power amplifiers, and between synthesizers themselves; in compact chassis, the above connection methods cannot meet these design requirements. Moreover, in the aforementioned traditional connection methods, especially the direct-plug structure, the contact parts of the inner and outer conductors are usually directly exposed to the internal environment of the equipment. In humid, dusty, or corrosive environments, the contact points are prone to oxidation or contamination, leading to increased contact resistance and intensified signal reflection, severely affecting the transmission quality of high-power RF signals and the long-term reliability of the connection. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides a quick-connect RF coaxial connector, which forms a sealed cavity between the first insulating support, the second insulating support, and the inner wall of the outer conductor, and places the inner conductor plug end therein. The purpose is to effectively isolate the external environment and prevent moisture and dust from entering the contact area, which can significantly improve the environmental resistance of the connector, ensure the stability and reliability of RF signal transmission, and simplify the plugging and unplugging operation.

[0006] This application is achieved through the following technical solution: A quick-connect radio frequency coaxial connector includes an inner conductor and an outer conductor. The inner conductor includes a first inner conductor and a second inner conductor that are axially mated together. The outer conductor includes a first outer conductor and a second outer conductor that are axially mated together. A first insulating support is connected between the first inner conductor and the first outer conductor. A second insulating support is connected between the second inner conductor and the second outer conductor. A sealed cavity is formed between the first insulating support, the second insulating support, and the inner wall of the outer conductor. The insertion end of the inner conductor is located within the sealed cavity.

[0007] By adopting the above technical solution, the inner conductor of the quick-connect RF coaxial connector is axially connected by a first inner conductor and a second inner conductor, while the outer conductor is axially connected by a first outer conductor and a second outer conductor, facilitating quick plug-in and unplugging connections. A first insulating support connects the first inner conductor and the first outer conductor, and a second insulating support connects the second inner conductor and the second outer conductor, ensuring insulation between the inner and outer conductors and preventing current leakage. The first insulating support, the second insulating support, and the inner wall of the outer conductor form a sealed cavity, with the plug-in end of the inner conductor located within this cavity. This effectively prevents external dust and moisture from entering, improving the connector's stability and reliability, extending its service life, and making it suitable for various complex working environments.

[0008] Optionally, a flexible reinforcing sheet is provided between the plug-in end of the first outer conductor and the plug-in end of the second outer conductor; and / or a flexible reinforcing sheet is provided between the plug-in end of the first inner conductor and the plug-in end of the second inner conductor.

[0009] By employing the above technical solution, a flexible and continuous radial or axial pressure can be provided at the mating interface of the inner or outer conductor. This reinforcing piece acts as a spring element, supplementing or enhancing the contact force generated by the conductor's own mating, ensuring a tight and reliable fit after insertion, especially after repeated insertions and removals or vibrations. The continuous contact pressure effectively reduces contact resistance, ensuring low-loss transmission of RF signals and good grounding continuity. The flexible reinforcing piece can compensate for manufacturing tolerances and wear caused by long-term use, giving the connector better vibration and shock resistance, and ensuring excellent connection performance even after repeated insertions and removals, thus improving product durability and reliability.

[0010] Optionally, the cross-section of the flexible reinforcing sheet has an arc-shaped structure.

[0011] By employing the above technical solution, the elastic deformation of the material is used to generate and maintain a stable supporting or clamping force. When the connector is mated, the arc-shaped structure is compressed or expanded, and its tendency to recover its deformation is converted into a continuous positive pressure on the mating conductor, acting like a ring spring, uniformly on the contact surface. The arc-shaped structure is simple to design and highly effective. It provides a more evenly distributed and durable contact pressure, ensuring reliable contact throughout the entire circumference. Compared to simple point or line contacts, this elastic support under surface contact can better adapt to minute dimensional changes, resulting in better electrical performance and mechanical stability of the connection, especially in high-frequency applications where it better suppresses signal reflection.

[0012] Optionally, the flexible reinforcing sheet is made of beryllium bronze.

[0013] By employing the above technical solution, the excellent physical properties of the alloy are utilized. Beryllium bronze is a high-performance elastic material that combines high conductivity, high strength, high hardness, high elastic limit, and excellent fatigue resistance. It also possesses good corrosion resistance and wear resistance, making it an ideal choice for manufacturing precision springs and electrical contact components. Using beryllium bronze to create flexible reinforcing sheets ensures that the component maintains its original elasticity and contact force even after long-term, repeated use, and is not prone to plastic deformation or fracture, exhibiting excellent fatigue resistance. Simultaneously, its high conductivity ensures that it will not adversely affect the radio frequency signal transmission path. This material selection significantly enhances the connector's lifespan, mating cycles, and long-term operational reliability under harsh conditions.

[0014] Optionally, the plug-in ends of the first inner conductor and the plug-in ends of the second inner conductor are electroplated with a silver layer.

[0015] By employing the above technical solution, a layer of highly conductive silver is coated onto the critical path of signal transmission—the inner conductor insertion surface. Silver has the highest conductivity of all metals, and its oxide (silver sulfide) still possesses a certain degree of conductivity, which is crucial for maintaining low contact resistance. Surface silver plating significantly reduces contact resistance, minimizing energy loss and signal distortion at the connection point, especially for high-power or high-frequency applications. Simultaneously, silver's relatively stable chemical properties effectively prevent oxidation of the base metal (such as copper), improving the long-term reliability of the connection. Even after slight oxidation, the degradation in signal transmission performance is far less than that of copper or brass materials, ensuring stable signal quality.

[0016] Optionally, the second inner conductor has a deformation hole at its end near the first inner conductor.

[0017] By adopting the above technical solution, the deformation hole facilitates smoother inner conductor insertion and generates a stable and reliable clamping force after mating. This not only ensures good electrical contact but also improves the connector's vibration resistance and mating / removal durability. It allows for tight fit within certain tolerances, reduces the extreme requirements for component machining precision, and thus helps control manufacturing costs and improve product assembly yield while ensuring performance.

[0018] Optionally, the interior of the first outer conductor and the second outer conductor are respectively provided with a first annular groove for accommodating and positioning the first insulating support and the second insulating support; the outer walls of the first inner conductor and the second inner conductor are respectively provided with a second annular groove for accommodating and positioning the first insulating support and the second insulating support.

[0019] By employing the above technical solution, matching annular grooves are machined on the inner and outer conductors, providing a precise mounting reference and axial and radial limits for the insulating support. The insulating support is firmly "locked" within these grooves, thus achieving its precise positioning and maintaining the coaxiality between the inner and outer conductors. This groove positioning structure ensures the accuracy and consistency of the coaxiality between the inner and outer conductors, which is crucial for ensuring the stability of the characteristic impedance of the RF connector and reducing signal reflection. It greatly enhances the structural stability and dimensional accuracy of the connector, preventing displacement of the insulating components during assembly, use, or impact, thereby guaranteeing the overall electrical performance and mechanical reliability of the connector.

[0020] Optionally, a first connecting hole is provided on the side of the first inner conductor away from the second inner conductor, and a second connecting hole is provided on the side of the second inner conductor away from the first inner conductor. The first connecting hole and the second connecting hole are used to connect with the suspension wire.

[0021] By adopting the above technical solution, connection holes for soldering or crimping "suspension lines" are provided at both ends of the connector. This defines the application scenario of the connector, namely, as a "board-to-board" or "module-to-module" connection bridge between two RF modules or circuit boards using a suspension line transmission structure. This design provides an efficient and reliable transition solution from coaxial structure to planar transmission line structure. It allows the connector to be easily integrated into modern RF systems, such as power dividers and modular combiner devices. Through optimized connection hole design, good impedance matching with the suspension line can be achieved, reducing signal reflection and loss at the transition point, ensuring the integrity and high performance of the entire signal link.

[0022] Optionally, the side of the first outer conductor away from the second outer conductor is connected to the rear panel of the preamp synthesizer, and the side of the second outer conductor away from the first outer conductor is connected to the front panel of the final synthesizer.

[0023] By adopting the above technical solution, the on-site installation, commissioning, and maintenance of the equipment are greatly simplified. Operators no longer need to individually plug and unplug RF cables; they only need to push the two modules into the rack or connect their panels to automatically complete the interconnection of RF signals. This significantly improves assembly efficiency, reduces the risk of human error, and makes the system layout neater and more compact.

[0024] Optionally, both the rear panel of the pre-stage synthesizer and the front panel of the final stage synthesizer are provided with a number of positioning holes, which are used to cooperate with externally installed equipment to install the connector in a designated position.

[0025] By employing the above technical solution, positioning holes are provided on the two device panels on which the connectors are mounted. These positioning holes mate with positioning pins or other external devices on the rack, guide rail, or another panel. Before the male and female connectors make contact, these positioning structures engage, guiding the two panels into precise relative positions. The positioning holes (pins) enable a high-precision "blind mating" function. This ensures that the RF coaxial connectors maintain strict axial alignment throughout the mating process, effectively avoiding serious problems such as pin bending, socket damage, or poor contact caused by misalignment. This is crucial for protecting expensive RF connectors, improving the success rate of large-scale assembly, and ensuring long-term connection reliability, especially in scenarios with limited operating space or automated assembly.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This application uses an axial plug-in connection between the inner and outer conductors, eliminating the need for hose clamp locking tools, simplifying the installation and disassembly process, shortening operation time, and reducing the requirements for internal maintenance space of the equipment. It is particularly suitable for compact chassis designs. 2. By constructing a sealed cavity inside the connector, this application isolates the electrical contact parts of the inner and outer conductors from the external environment, effectively preventing the intrusion of moisture, dust and contaminants, significantly improving connection reliability and environmental adaptability, and ensuring the long-term stability of radio frequency signal transmission; 3. This application provides a first annular groove inside the first outer conductor and the second outer conductor, and a second annular groove on the outer wall of the first inner conductor and the second inner conductor, respectively, for accommodating and positioning the first insulating support and the second insulating support, so that the insulating support is installed more securely and further ensures stable signal transmission. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the positioning hole described in Embodiment 1; Figure 2 This is a schematic diagram of the structure of the first inner conductor in Embodiment 1; Figure 3 This is a schematic diagram of the structure of the first annular groove in Embodiment 1.

[0028] In the figure: 1. Inner conductor; 11. First inner conductor; 111. First connecting hole; 12. Second inner conductor; 121. Second connecting hole; 13. Silver layer; 14. Deformation hole; 15. Second annular groove; 2. Outer conductor; 21. First outer conductor; 211. Rear panel of pre-stage synthesizer; 2111. Positioning hole; 22. Second outer conductor; 221. Front panel of final stage synthesizer; 23. First annular groove; 3. First insulating support; 4. Second insulating support; 5. Sealing cavity; 6. Flexible reinforcing sheet; 61. Arc-shaped structure; 7. Suspension wire. Detailed Implementation

[0029] The following will be combined with the appendix Figure 1-3 The technical solutions of the various embodiments of this application have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Reference Figures 1-2This application discloses a quick-connect radio frequency coaxial connector, including an inner conductor 1 and an outer conductor 2. The inner conductor 1 includes a first inner conductor 11 and a second inner conductor 12 that are axially connected and interlocked. The outer conductor 2 includes a first outer conductor 21 and a second outer conductor 22 that are axially connected and interlocked. A first insulating support 3 is connected between the first inner conductor 11 and the first outer conductor 21. A second insulating support 4 is connected between the second inner conductor 12 and the second outer conductor 22. A sealing cavity 5 is formed between the first insulating support 3, the second insulating support 4, and the inner wall of the outer conductor 2. The insertion end of the inner conductor 1 is located in the sealing cavity 5.

[0031] Specifically, refer to Figures 2-3 The quick-connect RF coaxial connector consists of two pluggable parts. The left part includes a first inner conductor 11, a first outer conductor 21, and a first insulating support 3. The right part includes a second inner conductor 12, a second outer conductor 22, and a second insulating support 4. During assembly, the right part is pushed axially towards the left part. The plug end of the second inner conductor 12 is inserted into the socket of the first inner conductor 11, achieving tight electrical contact through the elastic clamping force provided by the deformation hole 14. Simultaneously, the second outer conductor 22 is sleeved on the outside of the first outer conductor 21. At this time, the end face of the first insulating support 3 abuts against the end face of the second insulating support 4, together forming a closed sealing cavity 5 with the inner wall of the outer conductor 2, completely covering the plug end of the inner conductor, thereby achieving isolation from the external environment.

[0032] Reference Figures 1-2 The first inner conductor 11 in the inner conductor 1 is a conductive component of a certain length, which can be made of copper, a metal with good conductivity. It is cylindrical in shape with a relatively smooth surface to reduce resistance when in contact with other components. The first inner conductor 11 can be replaced with silver alloys or other highly conductive materials. The second inner conductor 12 is also a cylindrical conductive component, also made of copper, and it is axially inserted into the first inner conductor 11. During insertion, the axes of both should be aligned as much as possible to ensure good conductivity. The second inner conductor 12 can also be replaced with aluminum, but this may result in differences in conductivity. The axial insertion of the first inner conductor 11 and the second inner conductor 12 forms a conductive path in the inner conductor 1, allowing current to be smoothly conducted from the first inner conductor 11 to the second inner conductor 12. This structure is simple and provides reliable conductivity.

[0033] The first outer conductor 21 in the outer conductor 2 is a hollow cylindrical component that fits over the first inner conductor 11 and is separated from it by the first insulating support 3. The first outer conductor 21 can be made of stainless steel, which provides strength and corrosion resistance. Its inner wall is relatively smooth to ensure good fit with other components. The first outer conductor 21 can also be replaced with aluminum alloy to reduce weight. The second outer conductor 22 is also a hollow cylinder that axially inserts into the first outer conductor 21; it can also be made of stainless steel. During insertion, the two conductors must fit tightly to prevent external interference. The second outer conductor 22 can also be replaced with copper alloy, but this may result in different performance in terms of cost and corrosion resistance. The combination of the first outer conductor 21 and the second outer conductor 22 forms the structure of the outer conductor 2, which not only conducts electricity but also shields against external interference, ensuring the stability of signal transmission.

[0034] The first insulating support 3 is a ring-shaped component located between the first inner conductor 11 and the first outer conductor 21, serving both insulating and supporting functions. The first insulating support 3 can be made of plastic or other insulating materials, and its shape must be adapted to the shapes of the first inner conductor 11 and the first outer conductor 21 for a tight connection. The first insulating support 3 can also be replaced with ceramic or other insulating materials; ceramic has better high-temperature resistance. The second insulating support 4 is similar to the first insulating support 3, located between the second inner conductor 12 and the second outer conductor 22, also serving both insulating and supporting functions. Its material and shape are similar to the first insulating support 3, and it can also be made of plastic or ceramic. The presence of the first insulating support 3 and the second insulating support 4 ensures the insulation between the inner conductor 1 and the outer conductor 2, preventing current leakage, and also supports the structure of the inner and outer conductors 2, making them more stable.

[0035] Reference Figure 3 The insertion terminals of the first inner conductor 11 and the second inner conductor 12 are electroplated with a silver layer 13. Silver has extremely high conductivity, and the electroplated silver layer 13 can reduce contact resistance, improve conductivity efficiency, and thus improve the quality of signal transmission.

[0036] Reference Figures 2-3 A deformation hole 14 is provided at the end of the second inner conductor 12 near the end of the first inner conductor 11. When the first inner conductor 11 is inserted into the second inner conductor 12, the deformation hole 14 can cause a certain deformation at the end of the second inner conductor 12, thereby better fitting with the first inner conductor 11 and enhancing the tightness of the connection.

[0037] Reference Figure 2A first connecting hole 111 is provided on the side of the first inner conductor 11 away from the second inner conductor 12, and a second connecting hole 121 is provided on the side of the second inner conductor 12 away from the first inner conductor 11. The first connecting hole 111 and the second connecting hole 121 are used to connect with the suspension cable 7. Through these two connecting holes, the connector can be easily connected to the suspension cable 7 to realize signal transmission.

[0038] Reference Figure 2 The first outer conductor 21 and the second outer conductor 22 are respectively provided with first annular grooves 23 for accommodating and positioning the first insulating support 3 and the second insulating support 4; the outer walls of the first inner conductor 11 and the second inner conductor 12 are respectively provided with second annular grooves 15 for accommodating and positioning the first insulating support 3 and the second insulating support 4. These annular grooves can ensure that the insulating supports are accurately installed in the corresponding positions, and guarantee the connection stability between the inner conductor, the outer conductor and the insulating supports.

[0039] Reference Figures 2-3 A flexible reinforcing sheet 6 is provided between the plug-in end of the first outer conductor 21 and the plug-in end of the second outer conductor 22; and / or a flexible reinforcing sheet 6 is provided between the plug-in end of the first inner conductor 11 and the plug-in end of the second inner conductor 12.

[0040] Reference Figure 3 The flexible reinforcing piece 6 has an arc-shaped cross-section 61. The arc-shaped flexible reinforcing piece 6 can act as a buffer and reinforcement during insertion, making the insertion of the inner and outer conductors tighter and further improving the stability and conductivity of the connector.

[0041] Reference Figure 3 The flexible reinforcing sheet 6 is made of beryllium bronze. Beryllium bronze has good elasticity and electrical conductivity. Reference Figures 1-2 The side of the first outer conductor 21 away from the second outer conductor 22 is connected to the rear panel 211 of the preamp synthesizer, and the side of the second outer conductor 22 away from the first outer conductor 21 is connected to the front panel 221 of the final synthesizer.

[0042] Reference Figures 1-2 Both the rear panel 211 of the pre-stage synthesizer and the front panel 221 of the final stage synthesizer are provided with several positioning holes 2111. The positioning holes 2111 are used to mate with external equipment to install the connector in a designated position. This structure of positioning holes 2111 allows the connector to be accurately installed in the corresponding equipment, ensuring the stability and reliability of the entire system.

[0043] The implementation principle of this embodiment is as follows: This quick-connect RF coaxial connector achieves rapid insertion and removal through the axial mating of the inner and outer conductors, greatly simplifying the connection operation. The design of the sealed cavity 5 effectively prevents the influence of the external environment on the connection part, ensuring the stability of signal transmission. The flexible reinforcing sheet 6, the electroplated silver layer 13, and the deformation hole 14 structure further improve the conductivity and connection stability of the connector. Through the connection with the suspension cable 7 and the cooperation with the front and final stage synthesizer panels, the connector can be accurately installed in electronic equipment, providing a reliable guarantee for signal transmission. Compared with the traditional RF coaxial connector connection method, this embodiment has significantly improved in terms of ease of operation and signal transmission stability, solving the problems of cumbersome operation and susceptibility to external environmental influences in the traditional method, and providing better support for the development of the electronic communication field.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A quick-connect RF coaxial connector, characterized in that: The device includes an inner conductor (1) and an outer conductor (2). The inner conductor (1) includes a first inner conductor (11) and a second inner conductor (12) that are axially connected. The outer conductor (2) includes a first outer conductor (21) and a second outer conductor (22) that are axially connected. A first insulating support (3) is connected between the first inner conductor (11) and the first outer conductor (21). A second insulating support (4) is connected between the second inner conductor (12) and the second outer conductor (22). A sealed cavity (5) is formed between the first insulating support (3), the second insulating support (4), and the inner wall of the outer conductor (2). The insertion end of the inner conductor (1) is located in the sealed cavity (5).

2. The quick-connect RF coaxial connector according to claim 1, characterized in that: A flexible reinforcing sheet (6) is provided between the plug end of the first outer conductor (21) and the plug end of the second outer conductor (22); and / or a flexible reinforcing sheet (6) is provided between the plug end of the first inner conductor (11) and the plug end of the second inner conductor (12).

3. A quick-connect RF coaxial connector according to claim 2, characterized in that: The cross-section of the flexible reinforcing sheet (6) is an arc-shaped structure (61).

4. A quick-connect RF coaxial connector according to claim 2, characterized in that: The flexible reinforcing sheet (6) is made of beryllium bronze.

5. A quick-connect RF coaxial connector according to claim 1, characterized in that: The plug-in end of the first inner conductor (11) and the plug-in end of the second inner conductor (12) are electroplated with a silver layer (13).

6. A quick-connect RF coaxial connector according to claim 1, characterized in that: The second inner conductor (12) has a deformation hole (14) at the end near the first inner conductor (11).

7. A quick-connect RF coaxial connector according to claim 1, characterized in that: The first outer conductor (21) and the second outer conductor (22) are respectively provided with a first annular groove (23) for accommodating and positioning the first insulating support (3) and the second insulating support (4); the outer walls of the first inner conductor (11) and the second inner conductor (12) are respectively provided with a second annular groove (15) for accommodating and positioning the first insulating support (3) and the second insulating support (4).

8. A quick-connect RF coaxial connector according to claim 1, characterized in that: The first inner conductor (11) has a first connecting hole (111) on the side away from the second inner conductor (12), and the second inner conductor (12) has a second connecting hole (121) on the side away from the first inner conductor (11). The first connecting hole (111) and the second connecting hole (121) are used to connect with the suspension wire (7).

9. A quick-connect RF coaxial connector according to claim 1, characterized in that: The side of the first outer conductor (21) away from the second outer conductor (22) is connected to the rear panel (211) of the preamp synthesizer, and the side of the second outer conductor (22) away from the first outer conductor (21) is connected to the front panel (221) of the final synthesizer.

10. A quick-connect RF coaxial connector according to claim 9, characterized in that: Both the rear panel (211) of the pre-stage synthesizer and the front panel (221) of the final stage synthesizer are provided with a number of positioning holes (2111). The positioning holes (2111) are used to cooperate with external equipment to install the connector in a designated position.

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