Female contact pin assembly for radio frequency coaxial device and radio frequency coaxial device

Abstract

The utility model discloses a female contact pin assembly used for a radio frequency coaxial device and the radio frequency coaxial device. The female contact pin assembly comprises a first contact pin and a locking member. The first pin is of a split-groove-free structure, a containing hole is formed in the middle of the first pin, and the locking piece is contained in the hole to lock the pin male head of the external coaxial device. The characteristic impedance of the female contact pin assembly provided by the utility model is only influenced by the inner diameter of the outer conductor and the outer diameter of the pin and is irrelevant to the inner diameter of the pin, so that the expansion or gap of the locking piece does not influence the characteristic impedance, and the outer diameter of the pin can be kept stable by arranging the locking piece in the first pin and realizing a split groove-free design; and impedance mismatching caused by external diameter expansion is avoided. Meanwhile, the split groove-free structure eliminates gaps generated by the traditional split groove design, ensures the uniformity of the medium, and avoids signal attenuation and leakage caused by local dielectric constant change.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency coaxial, and particularly relates to a female pin assembly for radio frequency coaxial devices and a radio frequency coaxial device, in which the outer diameter of the female pin is closer to the design value and the medium uniformity is better. Background Art

[0002] Radio frequency coaxial devices refer to a class of devices used to transmit radio frequency signals, including radio frequency coaxial connectors, radio frequency coaxial cables, radio frequency coaxial loads, etc. They usually include pins, dielectric layers, and outer conductors, and maintain the integrity and stability of signals through a coaxial structure, and are widely used in fields such as communication, radar, and measurement.

[0003] The pin is the core component in radio frequency coaxial devices, located at the center of the device and responsible for transmitting radio frequency signals. The pin is usually made of copper or other highly conductive materials to ensure low loss and high efficiency of signal transmission. The diameter and material selection of the pin directly affect the characteristics and performance of the signal.

[0004] The importance of the pin lies in that it directly affects the transmission quality of the signal. As the main channel of the signal, the geometric dimensions, material properties, and surface finish of the pin are all related to the attenuation, reflection, and interference of radio frequency signals. High-quality pins can ensure the stable transmission of radio frequency signals, reduce energy loss, and improve the overall performance of radio frequency coaxial devices.

[0005] The invention patent application with the publication number of CN111725672A discloses a joint connection component and an Omega joint connection operation method. As Figure 1 shown, the pin used has a female head at one end and a male head at the other end. The female head is provided with a plurality of split grooves at intervals at the port to form a plurality of clamping claws, so that when the male head of the externally connected coaxial device is inserted, the clamping claws can expand outwards, and then the male head is clamped elastically by the clamping claws, improving the connection stability between the joint connection component and the externally connected coaxial device.

[0006] Similarly, the utility model patent with the authorization announcement number of CN219180801U discloses a novel inner conductor anti-rotation structure. As Figure 2 shown, the female head end of its pin is also provided with a split groove jack, and the split groove also makes a plurality of clamping claws formed at the end of the female head.

[0007] The female heads of the pins disclosed in the above two patent applications adopt the same structure. Although it can bring certain convenience to the connection of externally connected coaxial devices, according to the characteristic impedance formula (where: Z0 is the characteristic impedance, unit is ohm (Ω); ε r($\epsilon_r$ is the relative dielectric constant of the dielectric in the coaxial device, D is the inner diameter of the outer conductor, and d is the outer diameter of the pin), it can be seen that the outer diameter of the pin is crucial for impedance. However, on the one hand, the split groove and the claw cause the outer diameter of the claw to deviate from the designed value after expansion, that is, the outer diameter of the pin here changes, resulting in mismatched characteristic impedance, which in turn causes signal reflection and reduces the quality and efficiency of signal transmission. On the other hand, the split groove will inevitably form a gap between the claws, affecting the uniformity of the dielectric, thus causing local changes in the dielectric constant, resulting in signal attenuation or leakage during transmission, further affecting the signal stability and the overall performance of the radio frequency coaxial device.

[0008] Thus, it can be seen that the existing technology still needs to be improved and perfected. Utility Model Content

[0009] In view of the above deficiencies of the existing technology, the purpose of the present utility model is to provide a female pin assembly for a radio frequency coaxial device and a radio frequency coaxial device, aiming to solve the problems that the existing pin female head structure causes local changes in the outer diameter of the pin, resulting in mismatched characteristic impedance, signal reflection, reduced signal transmission quality and efficiency, and the gap between the claws causes non-uniformity of the dielectric, resulting in local changes in the dielectric constant, resulting in signal attenuation or leakage during transmission.

[0010] The technical solution of the present utility model is as follows:

[0011] A female pin assembly for a radio frequency coaxial device, which includes a first pin and a locking member. The first pin has a non-split groove structure and a receiving hole is provided in the middle. The locking member is received in the receiving hole and is used to lock the male pin of an external coaxial device.

[0012] The effect of the above solution is that since the characteristic impedance is only related to the inner diameter of the outer conductor and the outer diameter of the pin, and has nothing to do with the inner diameter of the pin, whether the locking member inside the first pin expands outwards or leaves a gap, etc., does not affect the characteristic impedance. Therefore, the present utility model realizes a non-split groove design by arranging the locking member inside the first pin, keeping the outer diameter of the first pin stable when the male head is inserted, and avoiding the problem of mismatched characteristic impedance caused by outer diameter expansion. In addition, the non-split groove structure eliminates the gap caused by the traditional split groove design, thus ensuring the uniformity of the dielectric and avoiding signal attenuation and leakage caused by local changes in the dielectric constant.

[0013] Meanwhile, the pin sizes in RF coaxial devices usually vary according to the application scenarios and frequency requirements. The common pin diameter ranges from 0.5 mm to 5 mm, and the diameter of the micro pins is generally about 0.5 mm to 1 mm. The length of the pins also varies depending on different connector types, but generally they are relatively short, usually between a few millimeters and a few centimeters. At the same time, due to the characteristic impedance requirements of RF coaxial devices, the outer diameter of the pins must be maintained with high precision, and the machining error of the smallest pins can reach as small as ±0.01 mm. Therefore, in the present utility model, the locking member is placed as an independent structural member inside the first pin, so that its dimensional error does not affect the characteristic impedance, greatly reducing its precision requirements. During machining, only the dimensional accuracy of the first pin needs to be ensured, and the first pin adopts a non-split groove structure in the present utility model, so its machining difficulty is greatly reduced.

[0014] In a further preferred embodiment, the female pin assembly further includes a central dielectric, and the end face of the second end of the first pin is in contact with the end face of the first end of the central dielectric.

[0015] The effect of the above solution is as follows: The design that the end face of the second end of the first pin is in contact with the end face of the first end of the central dielectric ensures the stability of the characteristic impedance in this contact area; this contact structure makes the characteristic impedance on the first side of the central dielectric depend only on the inner diameter of the outer conductor and the outer diameter of the first pin, without being affected by other factors. Since the first pin adopts an integrally formed design, its outer diameter remains consistent throughout the length, avoiding the problem of inconsistent outer diameters that is prone to occur in the traditional split pin structure. This not only improves the machining precision and consistency, but also simplifies the manufacturing process and reduces the production cost. In addition, the contact design further enhances the stability of the RF signal transmission path, reducing signal attenuation and reflection that may be caused by gaps or uneven contacts. Compared with the traditional pin structure, the present utility model further improves the quality and efficiency of signal transmission by reducing mechanical stress concentration points and possible manufacturing errors.

[0016] In addition, at the central dielectric, the characteristic impedance of the RF coaxial device is determined by the relative dielectric constant, inner diameter (i.e., the diameter of the central hole), and outer diameter of the central dielectric. Since the relative dielectric constant of the central dielectric is greater than that of air, setting the inner diameter of the central dielectric to be smaller than the outer diameter of the first pin can compensate for the characteristic impedance. The present utility model utilizes this feature to make the first pin in contact with the central dielectric, on the one hand, ensuring the continuity of the characteristic impedance of the RF coaxial device at the transition between the first pin and the central dielectric, and on the other hand, ensuring the position stability of the first pin.

[0017] In a further preferred embodiment, the female pin assembly further includes a second pin, the first end of the second pin passes through the central hole of the central dielectric, and is inserted into the receiving hole and abuts against the locking member.

[0018] The effects of the above solution are as follows: The insertion of the second pin ensures the positioning and fixation of the locking part inside the first pin, avoiding the displacement of the locking part due to vibration or other external forces during operation, thus ensuring a stable connection with the male head of the external coaxial device. This design not only improves the reliability of the connection but also reduces the poor contact problem caused by the loosening of the locking part. Moreover, the presence of the second pin makes the axial alignment of the overall pin assembly more precise, thereby reducing the reflection and loss during the transmission of radio frequency signals. At the same time, the second pin penetrates the central medium and is inserted into the first pin, further strengthening the structural stability of the first pin, avoiding the force generated by the lever principle from prying the end of the first pin when the external device is frequently inserted into the first pin, and cooperating with the movable gap at the end of the locking part reserved inside the first pin to improve the durability of the female head pin assembly.

[0019] In a further preferred solution, a plurality of claws are provided at the first end of the locking part, and the second end is in a circular ring shape.

[0020] The effects of the above solution are as follows: The reason why the present utility model takes the locking part as an independent structural part instead of setting it as a whole with the first pin or the second pin is to reduce its processing difficulty. It can be understood that the locking part needs to be adapted to the male pin of the external coaxial device, so it needs to be set as a circular ring with a central hole, but the second pin does not need to be. Therefore, if the locking part and the second pin are set as one body, a non-through deep hole needs to be opened at one end of the second pin. Relatively speaking, for non-through deep holes of the same size compared with through holes, there are the following problems during processing: 1. The cutting cannot be discharged from the other end but is restricted at the bottom or the hole wall of the hole, which is easy to accumulate, resulting in an increase in cutting force, accelerated wear of the drill bit, a decrease in the surface quality of the hole, and even possible jamming or breakage of the drill bit in the hole; 2. The non-through deep hole requires precise control of the drilling depth to avoid scrapping the workpiece due to the drill bit going too deep; 3. Since the deep hole has a closed bottom, an increase in the ratio of the hole depth to the diameter will lead to an increased risk of deviation during the drilling process, making it difficult to maintain the straightness, roundness, and depth of the hole consistent; 4. The closed bottom of the non-through hole makes it difficult for the coolant to flow smoothly to the end of the hole, resulting in a local temperature rise and possible overheating at the bottom of the hole, thus affecting the machining accuracy and the surface quality of the hole; 5. Due to the need to repeatedly stop to clean the chips, adjust the feed rate, and perform cooling, the processing time of non-through deep holes is usually longer. Therefore, the above setting reduces the processing difficulty of the locking part and the second pin and ensures the overall strength of the female head pin assembly.

[0021] In a further preferred solution, the claws are contracted into an inclined structure through a special necking tooling, tapering from the second end to the first end.

[0022] The effects of the above solution are as follows: By using a dedicated necking tooling to shrink the jaws, the jaws present a tapered structure that narrows from the second end to the first end, enabling precise control of the clamping force distribution of the jaws. The inclined design effectively optimizes the stress state of the jaws. When locking the male pin of an external coaxial device, the jaws can gradually provide uniform pressure to achieve a stable locking effect. On the other hand, this tapered structure can reduce the contact area between the jaws and the male pin, while ensuring the locking force, reducing the risk of wear, and extending the service life of the component. In addition, the precise control of the necking tooling makes the processing more convenient, ensuring the dimensional consistency and structural integrity of the jaws, thereby improving the processing efficiency and product reliability of the entire locking component.

[0023] In a further preferred solution, a limit ring and a positioning hole are provided at the first end of the first pin. The limit ring is used to limit the locking component, and the positioning hole is located inside the limit ring and is adapted to the male pin of the external coaxial device.

[0024] The effects of the above solution are as follows: The setting of the limit ring effectively provides precise axial limitation to the locking component, avoiding displacement or loosening of the locking component during use due to the insertion and extraction of the external male pin, thereby ensuring the stability and reliability of the locking function. The limit ring restricts the movement space of the locking component through its structure, enabling the locking component to always remain in the preset position and closely cooperate with the male pin of the external coaxial device. In addition, the positioning hole is precisely matched with the size of the male pin, further improving the insertion positioning accuracy of the male pin, avoiding deviation or inclination during insertion, thereby reducing problems such as poor contact and unstable signal transmission. The design combining the positioning hole and the jaws forms a dual function of radial limitation and clamping on the male pin, enabling the locking component to automatically adjust the clamping force of the jaws when the male pin enters, ensuring close and stable contact, and improving the continuity and reliability of signal transmission. The mutual cooperation of the limit ring, positioning hole, and jaws not only optimizes the smoothness of the insertion and extraction process, but also reduces wear and stress concentration caused by mechanical friction, extends the service life of the pin assembly, and significantly reduces the loss during the RF signal transmission process, improving the overall transmission efficiency.

[0025] In a further preferred solution, the female pin assembly further includes a second pin and a central medium. The second pin is cylindrical, and there are two first pins and two locking components. One first pin and one locking component form a female head locking structure, and the two female head locking structures are respectively arranged on both sides of the central medium.

[0026] The effects of the above solution are as follows: By arranging two female head locking structures on both sides of the central medium respectively, the pin assembly can obtain a more stable locking effect when connecting to an external coaxial device. The second pin is cylindrical, passes through the central medium and supports the two female head locking structures, providing stable structural support, ensuring the synchronous locking of the two locking parts with the male pin of the external coaxial device, effectively improving the alignment degree and connection stability between the plug and the socket, and avoiding the axial offset problem caused by unilateral locking. In addition, the central medium provides electrical isolation and mechanical support between the female head locking structures on both sides, further optimizing the radio frequency characteristics and structural stability, thereby improving the reliability and service life of the overall assembly.

[0027] In a further preferred solution, the female head pin assembly further includes a second pin and a central medium. The middle part and the first end of the second pin are cylindrical, and the second end adopts a male pin structure for docking with the female pin of an external coaxial device.

[0028] The effects of the above solution are as follows: The RF coaxial device with this structure is a male-to-female adapter. The middle part and the first end of the second pin are set to be cylindrical, which can provide uniform mechanical support, ensure the precise docking of the pin with the female head of the coaxial device, and reduce the displacement and inclination phenomena during the insertion process; moreover, the whole second pin does not need to be drilled, and the processing difficulty is greatly reduced. For the whole adapter, only the machining accuracy of the outer diameter and the smooth continuity of the outer surface of the first pin and the second pin need to be ensured, and no groove needs to be opened, so the characteristic impedance can be well guaranteed, improving the signal transmission performance of the adapter.

[0029] In a further preferred solution, the female head pin assembly further includes a second pin and a central medium. The middle part and the first end of the second pin are cylindrical; when the RF coaxial device is a calibration load, a resistance receiving groove is opened at the second end of the second pin to dock with the resistance of the calibration load; when the RF coaxial device is a calibration short circuit, the second end of the second pin is attached to or integrally provided with the outer conductor of the calibration short circuit; when the RF coaxial device is a calibration open circuit, the second end of the second pin is set to be suspended.

[0030] The effects of the above solution are as follows: When the RF coaxial device is used as a calibration load, a resistor receiving groove is provided at the second end of the second pin. This setting allows the resistor of the calibration load to be precisely docked with the pin assembly, ensuring that the resistor can be firmly fixed in the pin and effectively achieving calibration; the setting of the resistor receiving groove improves the contact consistency and stability, thereby optimizing the accuracy of the calibration process. For the application of calibration short circuit, the second end of the second pin is in contact or integrally provided with the outer conductor of the calibration short circuit, ensuring good electrical connection under the short circuit state, reducing reflection and interference in signal transmission, and improving the accuracy and reliability of the short circuit test. When the RF coaxial device needs to be calibrated for open circuit, the second end of the second pin is set to be suspended, so that the pin does not contact any conductor under the open circuit calibration state, thereby simulating the real open circuit state and effectively performing relevant tests. Obviously, the female pin assembly provided by the present utility model only needs to replace the second pin to be applicable to different types of RF coaxial devices, improving the versatility and flexibility of use of the female pin assembly, reducing the production cost of enterprises, and reducing the difficulty of inventory management.

[0031] An RF coaxial device includes the female pin assembly for RF coaxial devices as described above. The RF coaxial device includes all the technical features of the above-mentioned female pin assembly for RF coaxial devices, so it also includes all the technical effects of the above-mentioned female pin assembly for RF coaxial devices, which will not be elaborated here.

[0032] Compared with the prior art, the female pin assembly for RF coaxial devices provided by the present utility model includes a first pin and a locking member. The first pin adopts a non-slotted structure, and a receiving hole is provided in the middle. The locking member is received in the hole to lock the male pin of the external coaxial device. The characteristic impedance of the female pin assembly provided by the present utility model is only affected by the inner diameter of the outer conductor and the outer diameter of the pin, and has nothing to do with the inner diameter of the pin. Therefore, the expansion or gap of the locking member will not affect the characteristic impedance. By setting the locking member inside the first pin and implementing a non-slotted design, the outer diameter of the pin can be kept stable, avoiding impedance mismatch caused by outer diameter expansion. At the same time, the non-slotted structure eliminates the gaps generated by the traditional slotted design, ensuring the medium uniformity and avoiding signal attenuation and leakage caused by local dielectric constant changes. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of a 3.5 mm microwave coaxial matching load published in 200920255147X.

[0034] Figure 2 is a schematic structural diagram of a millimeter-wave calibration load published in 2020210517424.

[0035] Figure 3It is a cross-sectional view of a preferred embodiment of the female pin assembly provided by the present utility model.

[0036] Figure 4 It is a perspective view of a preferred embodiment of the female pin assembly provided by the present utility model.

[0037] Figure 5 It is a perspective view of the locking member used in a preferred embodiment of the female pin assembly provided by the present utility model.

[0038] Figure 6 It is a perspective view of the first pin used in a preferred embodiment of the female pin assembly provided by the present utility model. Detailed implementation manners

[0039] The present utility model provides a female pin assembly for radio frequency coaxial devices and a radio frequency coaxial device. To make the purpose, technical solution and effects of the present utility model clearer and more definite, the following further elaborates on the present utility model with reference to the accompanying drawings and by way of examples.

[0040] The present utility model provides a female pin assembly for radio frequency coaxial devices, as Figure 3 and Figure 4 shown, which includes a first pin 100 and a locking member; wherein, the first pin 100 adopts a non-split groove structure, and a receiving hole is provided in the middle, and the locking member is received in the hole to lock the male pin of an external coaxial device.

[0041] The locking member can adopt the following structures: 1. Claw structure, that is, the locking member is provided with a plurality of elastic claws. These claws spring open when the male pin is inserted and return to their original positions after the male pin is fully inserted, tightly clamping the male pin (this structure can provide reliable mechanical locking to prevent the male pin from shifting due to vibration or external force); 2. Spring structure, using a clamping structure with a built-in spring. The spring is compressed when the male pin is inserted, and when the male pin is fully inserted, the spring returns to its original state and clamps the male pin (this structure can provide an automatically adjustable locking force to adapt to the minor dimensional changes of the male pin); 3. Elastic ring structure, using an annular locking member made of elastic material, which can elastically deform when the male pin is inserted and return to its original state after the male pin is fully inserted, tightly fixing the male pin (this structure can provide a uniform locking force and is suitable for occasions with higher precision requirements for the male pin); 4. Wedge structure, achieving locking through the inclined surface acting force when the male pin is inserted (this structure can provide a strong clamping force and is suitable for high-vibration environments); 5. Friction locking structure, the inner surface of the locking member is coated with a high-friction material, and the male pin is locked by using the frictional force (the friction locking structure is simple and can achieve reliable locking without increasing mechanical complexity). It can be understood that the present utility model cannot list all possible alternative structures one by one. The above examples are only used to illustrate a part of the specific implementation manners of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0042] In addition, the basic solution provided by the present utility model only requires the outer diameter size and shape of the first pin to ensure the characteristic impedance at the corresponding position, and does not require the inner diameter of the first pin to be consistent, nor is there a high-precision requirement, which reduces the processing difficulty. At the same time, there are also many specific implementation manners that can be adopted. For example, the accommodation hole of the first pin can be a smooth round hole, or a round hole with a lower smoothness, or a wavy or other-shaped protrusions can be provided. The present utility model does not make specific requirements on this.

[0043] It can be understood that the above female pin assembly can be applied to radio frequency coaxial adapters, calibration kits (through, short, open, and load), radio frequency coaxial cables, radio frequency power dividers, radio frequency coaxial isolators (or circulators), radio frequency filters, and radio frequency coaxial attenuators, etc. The present utility model cannot list them one by one, but it should be understood that the protection scope of the present utility model is not limited to the above examples.

[0044] In a radio frequency coaxial adapter (female to female), the female pin assembly further includes a second pin and a central dielectric. The second pin is cylindrical. There are two first pins and two locking members. One first pin and one locking member form a female head locking structure, and the two female head locking structures are respectively arranged on both sides of the central dielectric. In a radio frequency coaxial adapter (male to female), the female pin assembly further includes a second pin and a central dielectric. The middle part and the first end of the second pin are cylindrical, and the second end adopts a male pin structure for docking with the female pin of an external coaxial device. It can be understood that the through-structure in the calibration component is similar to the adapter and can also adopt the above structure, which will not be elaborated here.

[0045] In the short circuit, open circuit, and load of the calibration kit, the female pin assembly further includes a second pin and a central dielectric. The middle part and the first end of the second pin are cylindrical; when the radio frequency coaxial device is a calibration load, a resistance receiving groove is provided at the second end of the second pin to dock with the resistance of the calibration load, and the other end of the resistance is connected to the outer conductor of the radio frequency coaxial device; when the radio frequency coaxial device is a calibration short circuit, the second end of the second pin is in contact with or integrally provided with the outer conductor of the calibration short circuit; when the radio frequency coaxial device is a calibration open circuit, the second end of the second pin is set to be suspended.

[0046] In a radio frequency coaxial cable, the female pin assembly further includes a wiring terminal for connecting the radio frequency coaxial cable. The wiring terminal is electrically connected to the second pin by crimping or welding. The second end of the second pin is used to connect to the inner conductor of the radio frequency coaxial cable to ensure the stability of signal transmission. The outer shell of the female pin assembly is electrically connected to the outer conductor of the radio frequency coaxial cable to provide a stable signal shielding effect.

[0047] In a radio frequency power divider, the female pin assembly further includes a branch structure for radio frequency power distribution. The first pin is respectively combined with a plurality of locking members to form a plurality of female head locking structures, which are respectively used to connect a plurality of external coaxial devices. The second pin is used to access the main signal source to ensure that the main signal is evenly distributed to each output port through the branch.

[0048] In a radio frequency coaxial isolator (or circulator), the female pin assembly further includes a third pin. The first pin and the second pin are respectively arranged at different ports of the female pin assembly and are used to access different modules of external coaxial devices or radio frequency systems respectively. The third pin is used to isolate or guide the radio frequency signals between different ports, so that the radio frequency signals can only be transmitted on a specific path, thereby realizing the isolation or circulation function.

[0049] In a radio frequency filter, the female pin assembly further includes a filtering element disposed in a central medium. The filtering element is electrically connected to the second pin and is used to perform frequency-selective filtering on the passing radio frequency signal to ensure that only the radio frequency signals in the required frequency band are transmitted while attenuating other frequency bands.

[0050] In a radio frequency coaxial attenuator, the female pin assembly further includes a resistance element for attenuating radio frequency signals. The resistance element is disposed at the second end of the second pin. The second pin is connected to the male pin of an external coaxial device through the resistance element to attenuate the passing radio frequency signal and ensure that the output power meets the predetermined requirements.

[0051] In a further preferred embodiment of the present invention, the female pin assembly further includes a central medium 300, as Figure 3 and Figure 4 shown, the end face of the second end of the first pin 100 is in contact with the end face of the first end of the central medium 300.

[0052] When the first pin 100 is attached to the central medium 300, both need to be fixed separately. In order to perform dimensional compensation on the characteristic impedance at the central medium 300, the inner diameter of the central medium 300 is usually smaller than the outer diameter of the first pin 100, and the outer diameter of the central medium 300 is usually larger than the inner diameter of the outer conductor. Therefore, the outer ring part of the central medium 300 can be fixed by the outer conductor of the radio frequency coaxial device, and the inner side is preferably fixed by the pins on both sides. The first pin 100 is preferably fixed by providing a second pin 400, inserting the first end of the second pin 400 into the receiving hole of the first pin 100, and then bonding the two pins together with glue.

[0053] Therefore, further, the female pin assembly further includes a second pin 400, as Figure 3 shown, the first end of the second pin 400 passes through the central hole of the central medium 300, and is inserted into the receiving hole and abuts against the locking member 200. It should be noted that the length of the receiving hole of the first pin 100 can be greater than the sum of the insertion length of the second pin 400 and the length of the locking member 200. That is, after installation, the locking member 200 can move back and forth in the receiving hole. Since the locking member 200 does not affect the characteristic impedance at the first pin 100, its back-and-forth movement does not affect the performance of the radio frequency coaxial device, and it can provide a certain amount of movement allowance for the locking member 200 when the male pin of the external coaxial device is inserted to prevent rigid collision from damaging the pins; the same is true when the male pin is pulled out.

[0054] According to another aspect of the present invention, as Figure 5As shown, multiple claws 220 are provided at the first end of the locking member 200, and the second end is in an annular shape 210. By providing multiple claws 220 at the first end of the locking member 200, it has the ability to effectively lock the male pin of an external coaxial device. The presence of multiple claws 220 enables the locking member 200 to automatically clamp the external male pin through elastic deformation after the male pin is inserted, providing a firm connection, preventing loosening, adapting to male pins of different specifications, making the insertion and extraction process of the male pin smoother, and ensuring a stable electrical connection under working conditions such as vibration and external force impact.

[0055] The second end of the locking member 200 is designed to be annular, which not only simplifies the processing technology but also improves the stability of its overall structure. The annular design provides a more uniform stress distribution for the locking member 200, enabling it to withstand greater mechanical stress without deformation or damage during operation. In addition, the annular structure also ensures the stable fit of the locking member 200 with the first pin 100, avoiding the offset or loosening of the locking member 200 during use and further enhancing the locking effect of the male pin.

[0056] The combination of the claws 220 and the annular structure of the locking member 200 provides good locking function and reliable mechanical connection. This design is applicable to various types of radio frequency coaxial devices, especially in scenarios that require frequent insertion and extraction or operate in harsh environments, ensuring the stable transmission of radio frequency signals and the reliable operation of the device.

[0057] Furthermore, the claws 220 are contracted into an inclined structure by a special necking tooling, narrowing from the second end to the first end (it can be clearly seen from Figure 5 the inclined structure and the inclined direction). The claws 220 are contracted into an inclined structure by a special necking tooling, making them have the characteristic of gradually narrowing from the second end to the first end. This design enables the claws 220 to smoothly guide the insertion when the male pin is inserted, and during the insertion process, gradually increasing locking force is provided through the elastic deformation of the claws 220. The inclined structure of the claws 220 not only reduces the friction during insertion and extraction, improving the smoothness of operation, but also ensures that the locking member 200 can achieve precise fit and reliable locking effect under male pins of different sizes.

[0058] Through the precise machining of the necking tooling, each part of the chuck 220 can achieve uniform deformation and stress, avoiding the situation of unstable locking or local overstress caused by uneven machining. The inclined shrinkage design also enhances the flexibility of the locking member 200. When the chuck 220 is locked, it can adapt to the size and shape of the male pin of the coaxial device, ensuring the compatibility and wide application of various coaxial devices. In addition, this shrinkage inclined structure also enables the chuck 220 to disperse external forces during operation, preventing mechanical fatigue caused by long-term use or high-frequency plugging and unplugging, thereby extending the service life of the locking member 200. The overall design enables the chuck 220 to not only provide an efficient locking effect, but also have high reliability and a low wear rate, and is particularly suitable for application in radio frequency coaxial devices with high requirements for connection stability and signal transmission accuracy.

[0059] Preferably, a limiting ring 110 and a positioning hole 120 are provided at the first end of the first pin 100, as Figure 6 shown. The limiting ring 110 is used to limit the locking member 200. The positioning hole 120 is located inside the limiting ring 110 and is adapted to the male pin of the external coaxial device. The first end of the first pin 100 is specially designed with a limiting ring 110 and a positioning hole 120 to improve the structural stability and performance of the entire pin assembly. The limiting ring 110 provides an accurate limiting function for the locking member 200 by being arranged outside the pin. During use, the locking member 200 can always be kept at a predetermined axial position under the restriction of the limiting ring 110, avoiding displacement or loosening of the locking member 200 caused by the plugging and unplugging actions of the external male pin. This accurate limiting function of the limiting ring 110 can ensure that the locking member 200 is always in close contact with the male pin of the external coaxial device, thereby enhancing the stability of the connection.

[0060] The positioning hole 120 is arranged inside the limiting ring 110 and is designed to be precisely adapted to the male pin of the external coaxial device. The positioning hole 120 can ensure that when the male pin is inserted into the female pin assembly, it can quickly and accurately find the correct position and avoid deviation or inclination during the insertion process. Through the precisely matched design of the positioning hole 120, not only the insertion efficiency of the pin is improved, but also the friction generated during insertion is effectively reduced, thereby reducing the wear during the plugging and unplugging process and extending the service life of the radio frequency coaxial device.

[0061] In addition, the combined design of the limiting ring 110 and the positioning hole 120 can effectively prevent the concentration of mechanical stress, reducing the structural fatigue or damage of the external male pin caused by repeated plugging and unplugging. Whether in an operating environment with frequent plugging and unplugging or in a usage scenario with high-precision signal transmission, the design of the limiting ring 110 and the positioning hole 120 can maintain the connection reliability of the pin assembly and ensure low loss and high stability of the radio frequency signal. This design is particularly suitable for occasions with strict requirements for radio frequency signal transmission, such as communication equipment, precision instruments and other fields, and can significantly improve the overall performance of the radio frequency connector.

[0062] The present utility model also provides a radio frequency coaxial device, which includes the female pin assembly for the radio frequency coaxial device as described above. The radio frequency coaxial device includes all the technical features of the above-mentioned female pin assembly for the radio frequency coaxial device, so it also includes all the technical effects of the above-mentioned female pin assembly for the radio frequency coaxial device, which will not be elaborated here.

[0063] In addition, those skilled in the art can understand that although some of the embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present utility model and forms different embodiments; for example, any one of the claimed embodiments can be used in any combination.

[0064] It should be noted that the above embodiments illustrate the present utility model rather than limit the present utility model, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present utility model can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices can be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A female pin assembly for a radio frequency coaxial device, characterized in that: It includes a first pin and a locking piece. The first pin adopts a non-slotted structure and has a receiving hole in the middle. The locking piece is accommodated in the receiving hole and is used to lock the male pin of an external coaxial device.

2. The female connector pin assembly for a radio frequency coaxial device according to claim 1, characterized in that: The female pin assembly also includes a central medium, and the second end surface of the first pin is in contact with the first end surface of the central medium.

3. The female connector pin assembly for a radio frequency coaxial device according to claim 2, characterized in that: The female pin assembly also includes a second pin, a first end of which passes through the central hole of the central medium and is inserted into the accommodating hole to support the locking member.

4. The female connector pin assembly for a radio frequency coaxial device according to claim 1, characterized in that: The first end of the locking member is provided with a plurality of claws, and the second end is in a circular ring shape.

5. The female connector pin assembly for a radio frequency coaxial device according to claim 4, characterized in that: The clamping claw is shrunk into an inclined structure through a special shrinking tool, and gradually narrows from the second end to the first end.

6. The female connector pin assembly for a radio frequency coaxial device according to claim 5, characterized in that: A limiting ring and a positioning hole are provided at the first end of the first pin. The limiting ring is used to limit the locking member. The positioning hole is located on the inner side of the limiting ring and is adapted to the male pin of an external coaxial device.

7. The female connector pin assembly for a radio frequency coaxial device according to claim 1, characterized in that: The female pin assembly also includes a second pin and a central medium. The second pin is cylindrical. Two of the first pin and the locking piece are provided. A first pin and a locking piece are combined to form a female locking structure. The two female locking structures are respectively provided on both sides of the central medium.

8. The female connector pin assembly for a radio frequency coaxial device according to claim 1, characterized in that: The female pin assembly also includes a second pin and a central medium. The middle portion and the first end of the second pin are cylindrical, and the second end adopts a male pin structure for docking with the female pin of an external coaxial device.

9. The female connector pin assembly for a radio frequency coaxial device according to claim 1, characterized in that: The female pin assembly also includes a second pin and a center medium, the middle part and the first end of the second pin are cylindrical; when the RF coaxial device is a calibration load, a resistance accommodating groove is provided at the second end of the second pin to connect with the resistance of the calibration load; when the RF coaxial device is a calibration short circuit, the second end of the second pin is fitted with or integrally arranged with the outer conductor of the calibration short circuit; when the RF coaxial device is a calibration open circuit, the second end of the second pin is suspended.

10. A radio frequency coaxial device, characterized in that: The radio frequency coaxial device comprises a female connector pin assembly for a radio frequency coaxial device as claimed in any one of claims 1 to 9.

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