Connector capable of being provided with protective tube, and cable assembly

Abstract

The present application relates to the technical field of electrical connecting members, and provides a connector capable of being provided with a protective tube, and a cable assembly. By means of the coaxial collinear design of a contact pin, an insulator and a casing after cooperation, the electrical performance of the cable assembly is ensured; by means of the design of a protective tube matching a sleeve, the design of the element structures and connecting and matching structures of a pressing tube, the sleeve, the protective tube and a tail tube, and the design of reserving a gap in an inner cavity of the connector, it is ensured that the protective tube is not in rigid connection with the connector, so that the integrated structure of the sleeve and the protective tube of the connector can rotate in the tail tube without affecting the firm connection of the tail tube and the casing, thereby achieving good anti-torsion and anti-rotation capabilities; a multi-layer waterproof structure is designed, improving the waterproof performance of the connector; in addition, the connector and the cable assembly of the present application have good stability and reliability.

Description

Connector and cable assembly capable of being installed with a protective tube Technical Field

[0001] The present application relates to the technical field of electrical connectors, and in particular to a connector and a cable assembly capable of being installed with a protective tube. Background Art

[0002] With the development of the communications industry, RF cable assemblies are widely used. For example, during the construction of subways, tunnels, and mine systems, the laid cable assemblies are inevitably subject to falling stones and people stepping on them, which inevitably damage the cables and affect their electrical performance. As a bridge for the interconnection and transmission of RF signals between devices, in order to ensure that the cable assemblies can ensure that the cables are intact and work normally in harsh and severe environments, they need to be protected by protective tubes of a certain strength. The existing RF coaxial cable assembly connection protection mechanism has the following deficiencies: the existing protection tube and connector are connected by crimping, which is easy to loosen during the use of the cable assembly and even cause the cable to fall off, and requires special crimping tools. When the crimping force is unstable, the product consistency is poor; the existing protection tube and connector use heat shrink tube for waterproof protection. In some harsh operating environments, when the coaxial cable needs to be bent multiple times, the tail of the heat shrink tube is prone to damage after the cable has been bent multiple times; when the existing protection tube and connector are assembled, a threaded hard connection is adopted. When the armor is rotated under force, the connector is twisted, and the connection between the armor and the connector is prone to loosening, causing the tail of the cable assembly to swing and the protection to fail. At the same time, the cable inside the protective tube is subjected to torque, which may cause the cable to twist and deform, resulting in unstable indicators, poor reliability and durability, and even the risk of failure.

[0003] Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a connector that can be installed with a protective tube, including a shell, a pin arranged in the shell, and an insulator arranged between the shell and the pin, the central axes of the shell, the pin and the insulator are collinear, the shell is divided into a front connecting part, a middle connecting part and a rear connecting part, the diameter of the middle connecting part is larger than the diameter of the rear connecting part; it also includes a pressing tube, a sleeve, a protective tube and a tail tube, the pressing tube can press the outer conductor of the coaxial cable onto the rear connecting part, the sleeve is fixed on the front outer side wall of the protective tube, the protective tube is used to be sleeved on the coaxial cable, the tail The tube is fixedly connected to the middle connecting part, and the front end of the protective tube and the sleeve are both located between the pressure tube and the tail tube; the interior of the tail tube is a hollow cavity, and the hollow cavity is provided with a first step, a second step and a third step with gradually increasing heights from the front end to the rear end, the first step is fixedly connected to the middle connecting part, the second step is used to accommodate the sleeve, and the third step is used to limit the sleeve to an internal cavity formed between the third step and the middle connecting part of the shell after the tail tube and the shell are fixedly connected, and the distance of the internal cavity along the length direction of the connector is greater than the length of the sleeve.

[0005] In some embodiments, a fourth step is provided at the rear end of the third step of the tail pipe, and the height of the fourth step is lower than that of the third step. A first sealing ring and a pressure ring are provided on the fourth step, and the pressure ring can press the first sealing ring to seal between the tail pipe and the protective tube.

[0006] In some embodiments, a glue injection hole is provided on the sleeve, and glue is injected between the sleeve and the protective tube.

[0007] In some embodiments, a second sealing ring is provided between the inner side wall of the pressure pipe and the rear connecting portion, and a third sealing ring is provided between the first step of the tail pipe and the middle connecting portion of the outer shell.

[0008] In some embodiments, the front connecting portion is connected to a threaded sleeve via a clamping ring, and a sealing gasket is provided between the front connecting portion and the threaded sleeve.

[0009] In some embodiments, wrench flats are provided on both the housing and the tail pipe.

[0010] In the second aspect, an embodiment of the present application provides a connector that can be installed with a protective tube, comprising a shell, a pin arranged in the shell, and an insulator arranged between the shell and the pin, the central axes of the shell, the pin, and the insulator are collinear, and the shell is divided into a front connecting part, a middle connecting part, and a rear connecting part, the diameter of the middle connecting part is larger than the diameter of the rear connecting part; it also includes a pressing tube, a sleeve, a protective tube and a tail tube, the pressing tube can press the outer conductor of the coaxial cable onto the rear connecting part, the protective tube is used to cover the coaxial cable, the tail tube is fixed on the middle connecting part, the sleeve includes a protruding end and a connecting end, the connecting end is fixed inside the front end of the protective tube, the protruding end is located outside the front end of the protective tube, the diameter of the protruding end is larger than the diameter of the protective tube, and the protruding end is located between the pressing tube and the between the tail pipes; the interior of the tail pipe is a hollow cavity, and a first step, a second step and a third step with gradually increasing heights are sequentially provided in the hollow cavity from the front end to the rear end, the first step is fixedly connected to the middle connecting portion, the second step is used to accommodate the protruding end of the sleeve, and the third step is used to limit the protruding end of the sleeve between the third step and the middle connecting portion of the shell in the internal cavity formed after the tail pipe and the shell are fixedly connected, and the distance of the internal cavity along the length direction of the connector is greater than the length of the protruding end of the sleeve.

[0011] In some embodiments, a fourth step is provided at the rear end of the third step of the tail pipe, and the height of the fourth step is lower than that of the third step. A first sealing ring and a pressure ring are provided on the fourth step, and the pressure ring can compress the first sealing ring to seal the tail pipe and the protective tube; a second sealing ring is provided between the inner side wall of the pressure tube and the rear connecting part; a third sealing ring is provided between the first step of the tail pipe and the middle connecting part of the outer shell; a threaded sleeve is connected to the front connecting part, and a sealing gasket is provided between the front connecting part and the threaded sleeve.

[0012] In some embodiments, a first internal thread is formed on the first step, and the first internal thread cooperates with a first external thread at the rear end of the middle connecting portion to fixedly connect the tail pipe to the outer shell.

[0013] In a third aspect, an embodiment of the present application provides a cable assembly, comprising a coaxial cable and a connector in any of the above embodiments that can be installed with a protective tube, the inner conductor of the coaxial cable being inserted into the pin and fixedly connected, the pressing tube pressing the outer conductor of the coaxial cable onto the rear connection portion of the outer shell and electrically connecting it to the outer shell, and the protective tube being sleeved on the coaxial cable.

[0014] The beneficial effects that this application can achieve.

[0015] The present application provides a connector and cable assembly that can be installed with a protective tube. The electrical performance of the cable assembly is ensured by the colinear design of the axes after the pin, insulator and shell are matched. The protective tube is matched with the sleeve design, as well as the element structure and connection matching structure of the pressure tube, sleeve, protective tube and tail tube are designed, and a gap design is left in the internal cavity of the connector to ensure that the protective tube is not rigidly connected to the connector, so that the integrated structure of the sleeve and protective tube of the connector can rotate in the tail tube without affecting the firm connection between the tail tube and the shell, and has good anti-torsion and anti-rotation capabilities. A multi-layer waterproof structure is designed, such as the waterproof design between the tail tube and the protective tube relying on the pressure block and the first sealing ring, the second sealing ring is set between the rear connection part of the pressure tube and the shell, the third sealing ring is set between the tail tube and the middle connection part of the shell, and the sealing gasket is set between the screw sleeve and the shell, thereby improving the waterproof performance of the connector. At the same time, the connector and cable assembly of the present application have good stability and reliability.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] FIG1 is a schematic cross-sectional view of a connector to which a protective tube can be installed according to the present invention;

[0019] FIG2 shows an exploded view of the assembly of components of a connector capable of being installed with a protective tube according to the present application;

[0020] FIG3 is a schematic structural diagram of a housing of a connector capable of being installed with a protective tube according to the present invention;

[0021] FIG4 is a schematic diagram showing an enlarged partial structure of an internal cavity of a connector capable of installing a protective tube according to the present application;

[0022] FIG5 is a schematic structural diagram of a tail pipe of a connector capable of installing a protective tube according to the present invention;

[0023] FIG6 is a schematic structural diagram of a sleeve inserted into a connector capable of installing a protective tube according to the present invention;

[0024] FIG7 is a schematic structural diagram of a connector that can be installed with a protective tube and adopts an inner sleeve structure according to the present application.

[0025] Among them: 1- shell, 101- front connection part, 102- middle connection part, 103- rear connection part, 2- pin, 3- insulator, 4- pressure tube, 5- sleeve, 6- protective tube, 7- tail pipe, 8- first step, 9- second step, 10- third step, 11- fourth step, 12- internal cavity, 13- first sealing ring, 14- pressure ring, 15- first internal thread, 16- first external thread, 19- second sealing ring, 20- screw sleeve, 21- retaining ring, 22- sealing gasket, 23- wrench surface, 24- coaxial cable, 25- first groove, 26- first protrusion, 27- limiting step, 28- limiting protrusion, 29- second groove, 30- third groove, 31- glue injection hole, 33- third sealing ring, 34- protruding end, 35- connecting end. DETAILED DESCRIPTION

[0026] The term "comprising" in the specification, claims, and drawings of this application is synonymous with "including," "containing," or "characterized by," and is inclusive or open-ended and does not exclude additional unrecited elements or method steps. "Comprising" is a technical term used in claim language to mean that the recited elements are present, but other elements may be added and still form a structure or method within the scope of the claim.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and are not to be understood as indicating or implying relative importance. The term "about" in this application is meant to include slight variations (up to + / - 10%) from the stated value.

[0028] With the development of modern science and technology, equipment is becoming more and more complex, and functional requirements are becoming more and more diverse. As a connector that bridges cables and equipment, people have put forward newer and higher requirements for its reliability. In this application, it has been found that the existing RF coaxial cable assembly connection protection mechanism has the following deficiencies: 1. The existing protection tube and connector are connected by crimping, which is easy to loosen during the use of the cable assembly, and even cause the cable to fall off, and requires a special crimping tool. When the crimping force is unstable, the product consistency is poor; 2. The existing protection tube and connector use heat shrink tubing for waterproof protection. In some harsh operating environments, when the coaxial cable needs to be bent multiple times, the tail of the heat shrink tubing is prone to damage after the cable has been bent multiple times; 3. When the existing protection tube and connector are assembled, a threaded hard connection is adopted. When the armor is rotated under force, the connector is twisted, and the connection between the armor and the connector is prone to loosening, causing the tail of the cable assembly to swing and the protection to fail. At the same time, the cable inside the protection tube is subjected to torque, which causes the cable to be twisted and deformed, resulting in unstable indicators, poor reliability and durability, and even the risk of failure.

[0029] In view of this, an embodiment of the present application provides a connector that can be installed with a protective tube, including a shell, a pin arranged in the shell, and an insulator arranged between the shell and the pin, the central axes of the shell, the pin, and the insulator are collinear, and the shell is divided into a front connecting part, a middle connecting part, and a rear connecting part, and the diameter of the middle connecting part is larger than the diameter of the rear connecting part; it also includes a pressing tube, a sleeve, a protective tube, and a tail tube, the pressing tube can press the outer conductor of the coaxial cable onto the rear connecting part, the sleeve is fixed on the front outer side wall of the protective tube, the protective tube is used to be sleeved on the coaxial cable, and the tail tube The sleeve is fixedly connected to the middle connecting part, and the front end of the protective tube and the sleeve are both located between the pressure tube and the tail tube; the interior of the tail tube is a hollow cavity, and the first step, the second step and the third step with gradually increasing heights are sequentially provided in the hollow cavity from the front end to the rear end, the first step is fixedly connected to the middle connecting part, the second step is used to accommodate the sleeve, and the third step is used to limit the sleeve to an internal cavity formed between the third step and the middle connecting part of the shell after the tail tube and the shell are fixedly connected, and the distance of the internal cavity along the length direction of the connector is greater than the length of the sleeve.

[0030] In some embodiments of the present application, a fourth step is provided at the rear end of the third step of the tail pipe, the height of the fourth step being lower than the third step, and a first sealing ring and a pressure ring are provided on the fourth step, the pressure ring being able to compress the first sealing ring to seal the tail pipe and the protective tube. A second sealing ring is provided between the inner side wall of the pressure tube and the rear connecting portion. A third sealing ring is provided between the first step of the tail pipe and the middle connecting portion of the housing. A threaded sleeve is connected to the front connecting portion, and a sealing gasket is provided between the front connecting portion and the threaded sleeve.

[0031] A connector in the above-mentioned embodiment of the present application that can be installed with a protective tube ensures the electrical performance of the cable assembly through the colinear design of the axes after the pin, insulator and shell are matched; through the design of the protective tube matching the sleeve, as well as the design of the component structure and connection matching structure of the pressure tube, sleeve, protective tube and tail tube, and the design of a gap in the internal cavity of the connector, it is ensured that the protective tube is not rigidly connected to the connector, so that the integrated structure of the sleeve and protective tube of the connector can rotate in the tail tube without affecting the firm connection between the tail tube and the shell, and has good anti-twisting and anti-rotation capabilities; and a multi-layer waterproof structure is designed to improve the waterproof performance of the connector. At the same time, the connector and cable assembly of the present application have good stability and reliability.

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] Example 1

[0035] In this application, it has been found that the existing RF coaxial cable assembly connection protection mechanism has the following deficiencies: the existing protection tube and connector are connected by crimping, which is easy to loosen during the use of the cable assembly and even cause the cable to fall off, and requires special crimping tools. When the crimping force is unstable, the product consistency is poor; the existing protection tube and connector use heat shrink tube for waterproof protection. In some harsh operating environments, when the coaxial cable needs to be bent multiple times, the tail of the heat shrink tube is prone to damage after the cable has been bent multiple times; when the existing protection tube and connector are assembled, a threaded hard connection is adopted. When the armor is rotated under force, the connector is twisted, and the connection between the armor and the connector is prone to loosening, causing the tail of the cable assembly to swing and the protection to fail. At the same time, the cable inside the protective tube is subjected to torque, which may cause the cable to twist and deform, resulting in unstable indicators, poor reliability and durability, and even the risk of failure.

[0036] In view of this, an embodiment of the present application provides a connector capable of being installed with a protective tube, as shown in the schematic diagram of the structure in Figure 1 and the schematic diagram of the assembled structure in Figure 2. The connector comprises a housing 1, a pin 2 disposed within the housing 1, and an insulator 3 disposed between the housing 1 and the pin 2. The central axes of the housing 1, the pin 2, and the insulator 3 are collinear. The housing 1 is cylindrical, with a first groove 25 disposed on its inner sidewall and a circle of first protrusions 26 disposed on the outer sidewall of the insulator 3. The first grooves 25 and the first protrusions 26 mate with each other to limit and secure the insulator 3. The insulator 3 is hollow and has a retaining step 27 disposed therein. The retaining step 27 mates with a retaining protrusion 28 on the pin 2 to limit and secure the pin 2. An interference fit can be provided between the pin 2 and the insulator 3, as well as between the insulator 3 and the housing 1, to securely hold the pin 2 and the insulator 3 within the housing 1. In some embodiments, the limiting protrusion 28 of the pin 2 is further provided with barbs to make the fixation of the pin 2 and the insulator 3 more secure.

[0037] As shown in the structural schematic diagram of the shell 1 in Figure 3, the shell 1 is divided into a front connecting part 101, a middle connecting part 102, and a rear connecting part 103. The diameter of the middle connecting part 102 is larger than the diameter of the rear connecting part 103. The middle connecting part 102 is provided with a wrench surface 23 and a first external thread 16, and the first external thread 16 is provided on the rear end outer wall of the middle connecting part 102. The front connecting part 101 is connected to the screw sleeve 20 through a retaining ring 21. As shown in the assembly structure schematic diagram of Figure 2 and Figure 3, a second groove 29 is provided on the front connecting part 101, and a third groove 30 is provided on the inner side wall of the screw sleeve 20. The retaining ring 21 is provided in the second groove 29 and the third groove 30 to movably connect the screw sleeve 20 to the shell 1. A sealing gasket 22 is also provided between the front connecting part 101 and the screw sleeve 20. The tail pipe 7 is threadedly connected to the middle connecting part 102.

[0038] As shown in Figures 1 and 4, the connector described in the present application also includes a pressure tube 4, a sleeve 5, a protective tube 6, and a tail tube 7. The protective tube 6 is used to cover the outside of the coaxial cable to provide protection. The pressure tube 4 can press the outer conductor of the coaxial cable 24 onto the rear connecting portion 103. The sleeve 5 is fixed to the front end of the protective tube 6, and the front end of the protective tube 6 and the sleeve 5 are both located between the pressure tube 4 and the tail tube 7. A glue injection hole 31 is provided on the sleeve 5. After the sleeve 5 and the protective tube 6 are connected, glue is injected through the glue injection hole 31 to firmly connect the protective tube 6 and the sleeve 5. After the glue is cured, the ends of the sleeve and the protective tube are ground flat to remove burrs.

[0039] As shown in Figures 1 and 5 , the interior of the tail pipe 7 is a hollow cavity. This cavity comprises four steps from the front to the rear: a first step 8, a second step 9, a third step 10, and a fourth step 11. The first step 8, the second step 9, and the third step 10 gradually increase in height, with the fourth step 11 being lower than the third step 10. The first step 8 is provided with a first internal thread 15, which cooperates with a first external thread 16 at the rear end of the middle connection portion 102 to securely connect the tail pipe 7 to the outer shell 1. The second and third steps 9, 10 at the rear end of the tail pipe 7 are smooth and unthreaded. The second step 9 is used to accommodate the sleeve 5. The third step 10 serves to position the sleeve 5, confining it within the internal cavity 12 formed between the third step 10 and the middle connection portion 102 of the outer shell 1 after the tail pipe 7 and the outer shell 1 are securely connected.

[0040] In the embodiment of the present application, in order to facilitate tightening the tail pipe 7, a wrench surface 23 is also provided on the tail pipe 7 to facilitate tightening with a wrench.

[0041] As shown in Figures 1 and 2, the connector described in the present application further includes a first sealing ring 13 and a pressure ring 14. A fourth step 11 is provided at the rear end of the third step 10 of the tail tube 7. The height of the fourth step 11 is lower than that of the third step 10. The first sealing ring 13 and the pressure ring 14 are provided on the fourth step 11. The pressure ring 14 can press the first sealing ring 13 to seal the tail tube 7 and the protective tube 6. In this embodiment, considering that the existing protective tubes and connectors use heat shrink tubes for waterproof protection, and the tail of the heat shrink tube is easily damaged, the first sealing ring 13 and the pressure ring 14 are provided at the tail of the connector tail tube 7. The pressure ring 14 is pressed into the fourth step 11 in the tail tube 7, so that the first sealing ring 13 is squeezed and deformed, wrapping the protective tube 6, playing a waterproof role, and not easily damaged.

[0042] As shown in Figures 1 and 4, in this embodiment, no threads are provided at the third step 10, and the tail pipe 7 and the protective tube 6 are not fixed by threads. The internal cavity 12 formed between the third step 10 and the outer shell 1 after the tail pipe 7 is fixedly connected to the outer shell 1 is greater than the length of the sleeve 5 along the length direction of the connector, thereby leaving a certain gap. When the coaxial cable or the connector is subjected to a certain torsional force, the combination of the sleeve 5 and the protective tube 6 can rotate in the internal cavity 12. In this application, it is taken into consideration that the existing coaxial cable is prone to twisting during installation and use, causing the connector to loosen due to torque. Therefore, the length of the first internal thread 15 provided on the inner wall of the tail tube 7 is set to be smaller than the length of the first step 8, and a second step 9 is provided to accommodate the sleeve 5, and a third step 10 is provided to limit the sleeve 5, so that after the tail tube 7 and the connector shell 1 are tightened, the length of the internal cavity 12 provided between the tail tube 7 and the shell 1 is greater than the length of the sleeve 5, ensuring that a gap of more than 1 mm is left at both ends of the sleeve 5 in the internal cavity 12 of the connector, so that the protective cover can rotate inside the connector when subjected to external torque, thereby avoiding loosening between the connector tail tube and the shell.

[0043] As shown in Figures 1 and 4, in order to further improve the waterproof performance of the connector, a second sealing ring 19 is provided between the inner wall of the pressure tube 4 and the rear connecting part 103 in the embodiment of the present application. During the installation of the coaxial cable, the pressure tube 4 is squeezed by force to ensure waterproofness between the coaxial cable and the rear connecting part 103 of the connector housing 1.

[0044] As shown in Figure 1, in order to further improve the waterproof performance, in an embodiment of the present application, a third sealing ring 33 is provided between the front end of the tail pipe 7 and the outer shell 1. The third sealing ring 33 is provided between the first internal thread 15 of the first step 8 and the first external thread 16 of the rear end of the middle connecting portion 102, thereby improving the sealing and waterproof performance between the tail pipe 7 and the outer shell 1.

[0045] During the installation process of the connector that can be installed with a protective tube in this embodiment, referring to the assembly diagram in Figure 2, the insulator 3 is first pressed into the connector housing 1, and then the sealing gasket 22 is put on the head of the connector housing 1, and the screw sleeve 20 is connected to the housing 1 using the clamping ring 21. The inner conductor of the coaxial cable is stripped and inserted into the pin 2 and welded (or crimped). The coaxial cable with the pin 2 is inserted into the insulator 3 in the connector housing 1, and the outer conductor of the coaxial cable is pressed tightly against the connector housing 1 using the pressure tube 4. Sleeve 5 onto protective tube 6 and inject glue through glue injection hole 31 to prevent the sleeve from slipping. Slip first sealing ring 13 onto tail tube 7 and pre-press pressure ring 14 into the tail tube 7 to complete the tail tube 7. Then, insert the tail tube 7 into protective tube 6. Then, insert protective tube 6 onto the coaxial cable connected to the connector housing 1. Tighten the tail tube 7 and the housing 1 through the middle connection 102. Finally, press pressure ring 14 between tail tube 7 and protective tube 6 to squeeze and deform the first sealing ring 13, thereby achieving waterproofing. Use a wrench to tighten the connector housing 1 and the wrench flats 23 on the tail tube 7 to complete the connector assembly.

[0046] Example 2

[0047] The connector for mounting a protective tube in Example 2 differs from that in Example 1 in the design of the fixing method for the sleeve and the protective tube. Specifically, in Example 2, as shown in Figures 6 and 7, the sleeve 5 includes a protruding end 34 and a connecting end 35. The connecting end 35 is fixed to the front end of the protective tube 6. The outer wall of the connecting end 35 is provided with an external thread with the same pitch as the internal thread of the protective tube 6. The sleeve 5 is fixed to the interior of the protective tube 6 through threaded engagement. The protruding end 34 is located outside the front end of the protective tube 6, has a diameter greater than that of the protective tube 6, and is located between the pressure tube 4 and the tail tube 7. In this embodiment, the length of the protruding end 34 of the sleeve 5 is smaller than the length of the internal cavity 12 formed within the connector. Specifically, the distance between the third step 10 and the housing 1 along the connector length direction, which forms the internal cavity 12 after the tail pipe 7 is fixedly connected to the middle connecting portion 102, is greater than the length of the protruding end 34 of the sleeve 5. The third step 10 limits the protruding end 34 of the sleeve 5 and ensures that rotation due to torsional force does not cause relative rotation between the connector tail pipe 7 and the housing 1, thereby preventing thread loosening. The remaining components and connection relationships are similar to those in Example 1 and are not further described here.

[0048] Example 3

[0049] This embodiment provides a cable assembly, as shown in Figures 1 and 2 , comprising a coaxial cable 24 and a connector capable of being installed with a protective tube 6 as described in any of the above embodiments. The inner conductor of the coaxial cable 24 is inserted into the pin 2 and fixedly connected (e.g., by welding, crimping, or other fixing methods). The crimping tube 4 presses the outer conductor of the coaxial cable 24 against the rear connection portion 103 of the housing 1 to electrically connect the housing 1. The protective tube 6 is sleeved over the coaxial cable 24. For the remaining details, refer to the description of Examples 1 and 2 and will not be repeated here.

[0050] The application relates to a connector and cable assembly that can be installed with a protective tube. The electrical performance of the cable assembly is ensured by the colinear design of the axes after the pins, insulators and shells are matched; the protective tube is matched with the sleeve design, and a gap design is left in the internal cavity of the connector to ensure that the protective tube is not rigidly connected to the connector so that it has a certain resistance to torsion and rotation; a multi-layer waterproof structure is designed, such as the waterproof design between the tail tube and the protective tube relying on the pressure block and the first sealing ring, the second sealing ring is set between the pressure tube and the rear connection part 103 of the shell 1, the third sealing ring 33 is set between the tail tube and the middle connection part 102 of the shell 1, and the sealing gasket 22 is set between the screw sleeve 20 and the shell 1, etc. Waterproof sealing design improves the waterproof performance, stability, and reliability of the connector.

[0051] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A connector capable of installing a protective tube, comprising a housing, a pin disposed in the housing, and an insulator disposed between the housing and the pin, wherein the central axes of the housing, the pin, and the insulator are coaxial and collinear, and characterized in that: The shell is divided into a front connecting part, a middle connecting part and a rear connecting part, and the diameter of the middle connecting part is larger than the diameter of the rear connecting part; The cable connector further comprises a pressure tube, a sleeve, a protective tube and a tail tube, wherein the pressure tube can press the outer conductor of the coaxial cable onto the rear connecting portion, the sleeve is fixed on the front outer side wall of the protective tube, the protective tube is used to be sleeved on the coaxial cable, the tail tube is fixedly connected to the middle connecting portion, the front end of the protective tube and the sleeve are both located between the pressure tube and the tail tube; the interior of the tail tube is a hollow cavity, and the interior of the hollow cavity is provided with a first step, a second step and a third step with gradually increasing heights from the front end to the rear end, the first step is fixedly connected to the middle connecting portion, the second step is used to accommodate the sleeve, and the third step is used to limit the sleeve to an internal cavity formed between the third step and the middle connecting portion of the outer shell after the tail tube and the outer shell are fixedly connected, and the distance of the internal cavity along the length direction of the connector is greater than the length of the sleeve.

2. A connector capable of being installed with a protective tube according to claim 1, characterized in that: A fourth step is provided at the rear end of the third step of the tail pipe, the height of the fourth step is lower than the third step, a first sealing ring and a pressure ring are provided on the fourth step, and the pressure ring can press the first sealing ring to seal between the tail pipe and the protection tube.

3. A connector capable of being installed with a protective tube according to claim 1, characterized in that: The sleeve is provided with a glue injection hole, and glue is injected between the sleeve and the protection tube.

4. A connector capable of being installed with a protective tube according to claim 1, characterized in that: A second sealing ring is arranged between the inner side wall of the pressure pipe and the rear connecting portion, and a third sealing ring is arranged between the first step of the tail pipe and the middle connecting portion of the outer shell.

5. A connector capable of being installed with a protective tube according to claim 1, characterized in that: The front connecting part is connected with a threaded sleeve via a clamping ring, and a sealing gasket is arranged between the front connecting part and the threaded sleeve.

6. A connector capable of being installed with a protective tube according to claim 1, characterized in that: The housing and the tail pipe are both provided with wrench surfaces.

7. A connector capable of being installed with a protective tube, comprising a housing, a pin disposed in the housing, and an insulator disposed between the housing and the pin, wherein the central axes of the housing, the pin, and the insulator are collinear, and characterized in that: The shell is divided into a front connecting part, a middle connecting part and a rear connecting part, and the diameter of the middle connecting part is larger than the diameter of the rear connecting part; The connector also includes a pressing tube, a sleeve, a protective tube and a tail tube, wherein the pressing tube can press the outer conductor of the coaxial cable onto the rear connecting portion, the protective tube is used to cover the coaxial cable, the tail tube is fixed on the middle connecting portion, the sleeve includes a protruding end and a connecting end, the connecting end is fixed inside the front end of the protective tube, the protruding end is located outside the front end of the protective tube, the diameter of the protruding end is larger than the diameter of the protective tube, and the protruding end is located between the pressing tube and the tail tube; the interior of the tail tube is a hollow cavity, and the interior of the hollow cavity is provided with a first step, a second step and a third step with gradually increasing heights from the front end to the rear end, the first step is fixedly connected to the middle connecting portion, the second step is used to accommodate the protruding end of the sleeve, the third step is used to limit the protruding end of the sleeve between the third step and the middle connecting portion of the shell in the internal cavity formed after the tail tube and the shell are fixedly connected, and the distance of the internal cavity along the length direction of the connector is larger than the length of the protruding end of the sleeve.

8. A connector capable of being installed with a protective tube according to claim 7, characterized in that: A fourth step is arranged at the rear end of the third step of the tail pipe, and the height of the fourth step is lower than that of the third step. A first sealing ring and a pressure ring are arranged on the fourth step, and the pressure ring can compress the first sealing ring to seal the tail pipe and the protection tube; a second sealing ring is arranged between the inner side wall of the pressure tube and the rear connecting part; a third sealing ring is arranged between the first step of the tail pipe and the middle connecting part of the shell; a threaded sleeve is connected to the front connecting part, and a sealing gasket is arranged between the front connecting part and the threaded sleeve.

9. A connector capable of being installed with a protective tube according to claim 7, characterized in that: The first step is provided with a first internal thread, and the first internal thread cooperates with a first external thread at the rear end of the middle connecting portion to fixedly connect the tail pipe to the outer shell.

10. A cable assembly, comprising a coaxial cable and a connector capable of being installed with a protective tube as claimed in any one of claims 1 to 9, characterized in that: The inner conductor of the coaxial cable is inserted into the pin and fixedly connected, the pressing tube presses the outer conductor of the coaxial cable onto the rear connecting part of the shell and is electrically connected to the shell, and the protective tube is sleeved on the coaxial cable.

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