Cable connecting piece

Abstract

The invention relates to a cable connecting piece, and provides the following scheme aiming at the problem that a signal wire cable at the tail end of a connecting piece in the prior art is easy to damage due to bending: the cable connecting piece comprises a connecting piece main body which is made by cutting a metal material; the first outer threaded pipe and the second outer threaded pipe are fixed to the two ends of the outer hexagonal section, are coaxial and are of a tubular structure, the inner diameter of the first outer threaded pipe is equal to the outer diameter of the second outer threaded pipe, and a fastening plug is slidably inserted into the circumferential inner wall of the end, close to the first outer threaded pipe, of the connecting piece body. When the anti-bending protection spring is used, a to-be-bent wire can be protected to a certain degree, the bending amplitude of the wire is greatly reduced compared with the protection without the anti-bending protection spring, and the anti-bending protection spring has the elastic recovery capacity and can automatically recover to the linear state under the action of small bending force.

Description

Technical Field

[0001] The present invention relates to the field of cable connectors, and particularly to a cable connector. Background Art

[0002] Cable connectors are electrical connection devices widely used in fields such as electric power, communication, automobiles, aviation, and industrial equipment. Their main function is to connect different cables together to ensure the smooth transmission of current and electrical signals. The design and selection of connectors are crucial because they directly affect the stability, safety, and long-term operation reliability of the system.

[0003] After retrieval, most of the existing cable connectors only focus on the tightness at the joint, but ignore another factor affecting the service life of the connector, that is, a part of the cable at the end of the connector will, during use, due to frequent plugging and unplugging and shaking, cause stress concentration at the junction with the connector body, and then skin breakage will occur from here, and even the core wire will break, until the cable completely fails. Therefore, we propose a new type of connector with anti-bending effect. Summary of the Invention

[0004] The present invention aims at the technical problems existing in the prior art and provides a cable connector.

[0005] The technical solution for the present invention to solve the above technical problems is as follows: A cable connector includes a connector body, the connector body is made by cutting a metal material, the connector body includes an external hexagonal section and external threaded pipes I and II which are coaxially fixed at both ends of the external hexagonal section and are in a tubular structure. The inner diameter of the external threaded pipe I is equal to the outer diameter of the external threaded pipe II, and the outer diameter of the external threaded pipe I is greater than the outer diameter of the external threaded pipe II. A fastening plug is slidably inserted into the circumferential inner wall of the connector body near the end of the external threaded pipe I. The fastening plug is in an overall stepped tubular structure, and the fastening plug is provided with an inner through-hole coaxial with the external threaded pipe II; the aperture of the inner through-hole is larger than the aperture of the external threaded pipe II; a self-locking thread is reserved on the circumferential outer wall of the external threaded pipe I, and a clamping nut is screwed on the circumferential outer wall of the external threaded pipe I; a tail vertebral tube is reserved at the end of the clamping nut away from the connector body, and the inner aperture of the tail vertebral tube is smaller than the aperture of the inner through-hole of the fastening plug. A bending-resistant protection spring is inserted into the inner hole of the tail vertebral tube. One end of the bending-resistant protection spring near the tail vertebral tube passes through the tail vertebral tube and is provided with an expanded diameter section whose diameter is larger than the aperture of the tail vertebral tube to ensure that the bending-resistant protection spring will not fall off when pulled from the outside; the inner diameter of the bending-resistant protection spring is equal to the aperture of the fastening plug; it can provide a certain protection for the wire about to be bent during use, greatly reducing the bending amplitude of the wire compared with the protection without the bending-resistant protection spring, and the bending-resistant protection spring itself has elastic recovery ability and can automatically return to a straight state under the action of a generally small bending force. A further setting of the present invention is that the circumferential inner walls of the first external thread pipe and the second external thread pipe are polished, and chamfers are provided at the circumferential inner edges of the pipe orifice at the junction of the first external thread pipe and the second external thread pipe. The outer edge diameter of the chamfer is larger than the aperture of the inner perforation, which facilitates the smooth passing of the wire passing through the fastening plug when threading.

[0006] A further setting of the present invention is that an internal thread groove adapted to the self-locking thread is reserved on the circumferential inner wall of the clamping nut, and a raw tape is wound around the circumferential outer wall of the first external thread pipe; this can achieve an anti-dropping effect. The circumferential inner wall of the second external thread pipe extends all the way to the junction with the circumferential inner wall of the first external thread pipe, and axial heat dissipation grooves are opened on the circumferential inner wall of the second external thread pipe. The number of axial heat dissipation grooves is less than four, and all the axial heat dissipation grooves are centrally symmetrically distributed; a plurality of radiation holes communicating with the outside are opened at the bottom of the axial heat dissipation grooves, and the axis lines of the radiation holes intersect on the axis line of the second external thread pipe. This can not only separately guide out the core wire of the signal wire and firmly fix it at the required position, but also leave a gap between the outer wall of the core wire and the inner wall of the second external thread pipe, improving the heat dissipation effect of the core wire.

[0007] A further setting of the present invention is that an annular washer groove is opened on the side of the external hexagonal section away from the first external thread pipe, and the center of the annular washer groove falls on the axis line of the first external thread pipe. An O-ring washer is sleeved on the circumferential outer wall of the second external thread pipe near the external hexagonal section, and the inner diameter of the O-ring washer is adapted to the diameter of the annular washer groove; multiple inclined cut grooves are provided on the circumferential outer wall of the O-ring washer, so as to increase the anti-slip and anti-dropping effects when tightened to the end, that is, when the O-ring washer contacts the surface of the fastening female part.

[0008] A further setting of the present invention is that an annular wire storage groove is opened on the side of the external hexagonal section close to the second external thread pipe, and a plurality of externally perforated holes symmetrically distributed around the center are opened at the end of the second external thread pipe near the first external thread pipe, and the outlet of the externally perforated hole faces the bottom of the wire storage groove; thus, when in use, the wire outside the core wire of the signal wire cable can be passed out through the corresponding externally perforated hole, and then with the pressing of the clamping nut, the signal transmission can be formed.

[0009] The present invention is further provided with that the overall shape of the clamping nut is a hexagonal prism structure, and two opposite side surfaces of the clamping nut are respectively provided with wire pressing mechanisms which are centrally symmetrically distributed with each other; the clamping nut is provided with anti-slip grooves on the side surfaces of the wire pressing mechanism, and the extension direction of the anti-slip grooves is parallel to the axis of the external threaded tube, and the anti-slip grooves are provided with a plug-in outlet at one end close to the external hexagonal section, and the wire pressing mechanism includes an anti-twist push rod slidably connected to the anti-slip groove, the anti-twist push rod is fixed with a tightening spring at one end away from the external hexagonal section, and the anti-twist push rod is fixed with an arc-shaped pressure plate which can be extended into the wire hiding groove at one end close to the external hexagonal section, and the arc-shaped pressure plate can move freely in the wire hiding groove with the axial movement of the anti-twist push rod and the overall rotation, that is, it can press objects at any position; and the arc-shaped pressure plate The center angle of the pressure plate is equal to 90 degrees; the arc-shaped pressure plate is made of metal material; and the inner diameter of the arc-shaped pressure plate is larger than the outer diameter of the external threaded tube one, ensuring that the arc-shaped pressure plate can be freely screwed on the outer wall of the external threaded tube one along with the clamping nut; the arc-shaped pressure plate is provided with a plurality of staggered anti-slip prongs on the side close to the bottom of the wire-hiding groove, which can increase the electrical contact strength between the wires extending from the external through-holes and reduce the poor contact; the anti-twist top rod is provided with a rib plate near the middle on the side away from the bottom of the groove, and a toggle ball is fixed on the end of the rib plate away from the anti-twist top rod, which not only does not affect the clamping of the outer wall of the clamping nut during screwing, but also can press the external wire tightly against the metal connector body, and the pre-tightening thrust generated by the clamping spring can continuously generate pressure to ensure that the electrical contact is continuously good.

[0010] A further arrangement of the present invention is that the fastening plug includes a thin tube section and a thick tube section. The circumferential outer wall of the thin tube section forms a sliding fit with the circumferential inner wall of the first external thread tube. The outer diameter of the thick tube section is equal to the root circle diameter of the first external thread tube to ensure that the fastening plug can be normally inserted. The length of the thin tube section is less than or equal to the length of the first external thread tube. Three axial rectangular grooves are formed on the circumferential inner wall of the inner perforation of the fastening plug, and the multiple rectangular grooves are symmetrically distributed about the center. A retaining rack is fixed to the bottom of the groove at the end of the rectangular groove away from the connecting piece body. The width of the retaining rack is less than the width of the rectangular groove. The whole of the retaining rack is in an L-shaped structure, and a section of the retaining rack away from its fixed end is a retaining flat bar. A right-angled top tooth is reserved on the side of the retaining flat bar away from the bottom of the rectangular groove. The extending direction of the retaining flat bar is parallel to the axis of the fastening plug, and a gap is left between the retaining flat bar and the bottom of the groove. The diameter of the circle formed by all the right-angled top teeth is less than the aperture of the second external thread tube, that is, the outer skin of the signal line cable can be tightly bitten. A tensioning gasket is slidably inserted between the retaining flat bar of the retaining rack and the bottom of the rectangular groove at its position. A pull ring is reserved at one end of the tensioning gasket away from the fixed end of the retaining rack. The thickness of one end of the tensioning gasket away from the pull ring is greater than the thickness of other positions of its own body. Thus, after the signal line cable passes through the fastening plug, the tensioning gasket can be pulled out a certain distance until its thickened end is located at the right-angled top tooth, and then the extra section is cut off. At this time, the right-angled top tooth can be pressed more tightly against the outer surface of the signal line cable, greatly improving the anti-detachment effect.

[0011] A further arrangement of the present invention is that a combined gasket is fixed to one end of the bending-resistant protection spring close to the diameter-expanded section. The combined gasket includes an ordinary annular gasket and L-shaped clamping pieces symmetrically distributed on its surface. The inner and outer diameters of the combined gasket are adapted to the end face size of the thick tube of the fastening plug, and the outer diameter of the combined gasket is greater than the aperture of the inner hole of the tail spinal canal. The lengths of the L-shaped clamping pieces are in a stepped shape in turn to ensure that each L-shaped clamping piece can tightly fix the diameter-expanded section on the surface of the combined gasket. An inner-ring protruding hook plate is reserved at one end of the L-shaped clamping piece away from the fixed end, which can enhance the fixing effect on the bending-resistant protection spring.

[0012] A further arrangement of the present invention is that the circumferential outer wall of the tail spinal canal is arranged in a conical structure, and multiple circles of parallel anti-slip grooves are formed on the circumferential outer wall of the tail spinal canal. An insulating tape is wound on the anti-slip grooves. The initial end of the insulating tape is fixed on the circumferential outer wall of the tail spinal canal, and then it is spirally wound until the bending-resistant protection spring is wound. By setting the insulating tape wound on the outer walls of the tail spinal canal and the bending-resistant protection spring, the anti-bending effect of the bending-resistant protection spring near the connecting piece body can be increased.

[0013] A further configuration of the present invention is that two centrally symmetrically distributed spacer inserts are fixed to the circumferential inner wall of the coccyx tube, and the spacer inserts are in a quarter-segment spiral structure as a whole, the pitch of the spacer inserts is equal to the pitch of the anti-bending protection spring when no force is applied, and the thickness of the spacer inserts is equal to the spacing of the anti-bending protection spring when no force is applied; and the spacer inserts are inserted into the anti-bending protection spring, and through the set spacer inserts, traction and fixation of the anti-bending protection spring can be formed again at the coccyx tube, thereby reducing the risk of the anti-bending protection spring falling off.

[0014] The beneficial effects of the present invention are: 1. By setting an anti-bending protection spring with an expanded diameter section that is clamped between the fastening plug and the coccyx tube, it can provide a certain degree of protection for the wire that is about to bend during use. Compared with the case without the protection of the anti-bending protection spring, the bending amplitude of the wire is greatly reduced. In addition, the anti-bending protection spring itself has elastic recovery ability and can automatically return to a straight state under the action of a relatively small bending force. 2. By providing the second external threaded tube with axial heat dissipation grooves and radial holes, not only can the core wire of the signal line be guided out separately and firmly fixed in the required position, but also a gap is left between the outer wall of the core wire and the inner wall of the second external threaded tube, thereby improving the heat dissipation effect of the core wire; 3. By providing a wire pressing mechanism on opposite sides of the clamping nut and an anti-twist push rod with a toggle ball to control sliding and squeezing, it can be used without affecting the clamping of the outer wall of the clamping nut during screwing. In addition, the external wire can be tightly pressed against the metal connector body, and the pre-tightening thrust generated by the clamping spring can continuously generate pressure to ensure that the electrical contact is continuously good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is the main view after the present invention is installed; Figure 3 is a three-dimensional schematic diagram of the connecting member body in the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the clamping nut in the present invention; Figure 5 A partial cross-sectional view of the connector body of the present invention; Figure 6 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along line AA; Figure 7 This is a schematic diagram of a half-section structure of the anti-bending protection spring after installation in the present invention; Figure 8 Schematic diagram of the assembly structure of the fastening plug in the present invention; Figure 9 Schematic diagram of the assembly structure of the tensioning gasket strip in the present invention; Figure 10 Schematic diagram of the assembly structure of the wire pressing mechanism in the present invention; Figure 11 Assembly drawing of the bending-resistant protection spring and the combined gasket in the present invention.

[0016] In the accompanying drawings, the list of components represented by each reference numeral is as follows: 1. Connector body; 101. Outer perforation; 102. Hidden wire groove; 103. Outer hexagonal section; 104. Annular washer groove; 105. First outer threaded tube; 106. Second outer threaded tube; 107. Axial heat dissipation groove; 2. O-ring gasket; 3. Arc-shaped pressing plate; 301. Anti-slip tip; 4. Anti-twist ejector rod; 5. Dialing ball; 6. Tightening spring; 7. Clamping nut; 701. Tail vertebral tube; 702. Anti-detachment chute; 703. Inner threaded groove; 8. Bending-resistant protection spring; 801. Diameter-expanded section; 9. Fastening plug; 901. Rectangular groove; 10. Combined gasket; 11. L-shaped clamping part; 1101. Protruding hook plate; 12. Partition inserting piece; 13. Tensioning gasket strip; 1301. Pulling ring; 14. Anti-backlash rack. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0018] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0019] In the description of the present application, the term "for example" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "for example" in the present application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0020] Embodiment 1 Please refer to Figures 1-11 , including a connector body 1 with a cylindrical tubular structure at both ends and a hexagonal disc-shaped structure in the middle. The connector body 1 is made by cutting a metal material. The connector body 1 includes an external hexagonal section 103, and external threaded tubes 105 and 106 with a coaxial tubular structure fixed at both ends of the external hexagonal section 103. The inner diameter of the external threaded tube 105 is equal to the outer diameter of the external threaded tube 106, and the outer diameter of the external threaded tube 105 is greater than the outer diameter of the external threaded tube 106. A fastening plug 9 is slidably inserted into the circumferential inner wall of one end of the connector body 1 close to the external threaded tube 105. The fastening plug 9 has an overall stepped tubular structure, and an inner perforation coaxial with the external threaded tube 106 is reserved in the fastening plug 9; the aperture of the inner perforation is larger than the aperture of the external threaded tube 106; a self-locking thread is reserved on the circumferential outer wall of the external threaded tube 105, and a clamping nut 7 is screwed on the circumferential outer wall of the external threaded tube 105; a tail spinal canal 701 is reserved at one end of the clamping nut 7 away from the connector body 1, and the inner aperture of the tail spinal canal 701 is smaller than the aperture of the inner perforation of the fastening plug 9. A bending resistance protection spring 8 is inserted into the inner hole of the tail spinal canal 701. One end of the bending resistance protection spring 8 close to the tail spinal canal 701 passes through the tail spinal canal 701 and has an expanded diameter section 801. The diameter of the expanded diameter section 801 is larger than the aperture of the tail spinal canal 701 to ensure that the bending resistance protection spring 8 will not fall off when pulled from the outside; the inner diameter of the bending resistance protection spring 8 is equal to the aperture of the fastening plug 9; Specifically, by providing a bending resistance protection spring 8 with an expanded diameter section 801 clamped between the fastening plug 9 and the tail spinal canal 701, it can provide a certain protection to the wire about to be bent during use, greatly reducing the bending amplitude of the wire compared to the case without the protection of the bending resistance protection spring 8. Moreover, the bending resistance protection spring 8 itself has an elastic recovery ability and can automatically return to a straight state under the action of a generally small bending force.

[0021] Embodiment 2 Please refer to Figure 3, the circumferential inner walls of the first external thread tube 105 and the second external thread tube 106 are polished, and chamfers are provided at the circumferential inner edges of the junction ends of the first external thread tube 105 and the second external thread tube 106. The outer edge diameter of the chamfer is larger than the aperture of the inner perforation, facilitating the smooth passage of the wire passing through the fastening plug 9 during wire threading.

[0022] Referring to Fig. 4, an internal thread groove 703 adapted to the self-locking thread is reserved on the circumferential inner wall of the clamping nut 7, and a sealing tape is wound around the circumferential outer wall of the first external thread tube 105, which can achieve an anti-dropping effect. The circumferential inner wall of the second external thread tube 106 extends to the junction with the circumferential inner wall of the first external thread tube 105, and an axially penetrating heat dissipation groove 107 is formed on the circumferential inner wall of the second external thread tube 106. The number of axially penetrating heat dissipation grooves 107 is less than four, and all the axially penetrating heat dissipation grooves 107 are centrally symmetrically distributed. A plurality of radiation holes communicating with the outside are formed at the bottom of the axially penetrating heat dissipation groove 107, and the axial center lines of the radiation holes intersect on the axial center line of the second external thread tube 106. By providing the second external thread tube 106 with axially penetrating heat dissipation grooves 107 and radiation holes, not only can the core wire of the signal wire be separately guided out and firmly fixed at the required position, but also a gap is left between the outer wall of the core wire and the inner wall of the second external thread tube 106, improving the heat dissipation effect of the core wire.

[0023] Referring to Figure 3 and Figure 5 , an annular washer groove 104 is formed on the side of the external hexagonal section 103 away from the first external thread tube 105, and the center of the annular washer groove 104 lies on the axial center line of the first external thread tube 105. An O-ring 2 is sleeved on the circumferential outer wall of the second external thread tube 106 near the external hexagonal section 103, and the inner diameter of the O-ring 2 is adapted to the diameter of the annular washer groove 104. A plurality of inclined cutting grooves are provided on the circumferential outer wall of the O-ring 2, so as to increase the anti-slip and anti-dropping effects when tightened to the end, that is, when the O-ring 2 contacts the surface of the fastening parent part.

[0024] Referring to Figure 5 , a wire storage groove 102 with an annular structure is formed on the side of the external hexagonal section 103 close to the second external thread tube 106, and a plurality of externally perforated holes 101 distributed in a centrally symmetric manner are formed at the end of the second external thread tube 106 near the first external thread tube 105. The outlets of the externally perforated holes 101 are opposite to the bottom of the wire storage groove 102. Thus, during use, the wires outside the core wire of the signal wire cable can be passed through the corresponding externally perforated holes 101, and then with the pressing of the clamping nut 7, the signal transmission can be formed.

[0025] Embodiment 3 Please refer to Figure 1 , Figure 4 , Figures 6-8The overall shape of the clamping nut 7 is a hexagonal prism structure, and two of the opposite sides of the clamping nut 7 are respectively provided with a wire pressing mechanism that is symmetrically distributed with respect to the center; the clamping nut 7 is provided with an anti-slip groove 702 on the side of the wire pressing mechanism, and the extension direction of the anti-slip groove 702 is parallel to the axis of the external threaded tube 105, and the anti-slip groove 702 is close to the end of the external hexagonal section 103 with a plug-in outlet reserved, and the wire pressing mechanism includes a sliding connection in the anti-slip groove 702. The anti-twist push rod 4 inside, the end of the anti-twist push rod 4 away from the outer hexagonal section 103 is fixed with a tightening spring 6, and the end of the anti-twist push rod 4 close to the outer hexagonal section 103 is fixed with a curved pressure plate 3 that can extend into the hidden wire groove 102, the curved pressure plate 3 can move freely in the hidden wire groove 102 with the axial movement of the anti-twist push rod 4 and the overall rotation, that is, it can press objects at any position; and the center angle of the curved pressure plate 3 is less than 180 degrees; the curved pressure plate 3 is made of metal The cam 3 is made of a material; and the inner diameter of the arc pressure plate 3 is larger than the outer diameter of the external threaded tube 105, ensuring that the arc pressure plate 3 can be freely screwed on the outer wall of the external threaded tube 105 as the clamping nut 7; the arc pressure plate 3 is provided with a plurality of staggered anti-slip prongs 301 on the side close to the bottom of the wire-hiding groove 102, which can increase the electrical contact strength between the wires extending from the outer through-hole 101 and reduce the poor contact; the anti-twist rod 4 is provided with a rib plate near the middle on the side away from the bottom of the groove, and a toggle ball 5 is fixed on the end of the rib plate away from the anti-twist rod 4. By means of the wire pressing mechanism provided on the opposite sides of the clamping nut 7 and the anti-twist rod 4 with the toggle ball 5 to control the sliding extrusion, it can be used without affecting the clamping of the outer wall of the clamping nut 7 during screwing, and the wire passing outside can be tightly pressed against the metal connector body 1, and the pre-tightening thrust generated by the tightening spring 6 can continuously generate pressure to ensure that the electrical contact is continuously good.

[0026] Example 4 Please refer to Figure 6 、 Figures 8-9, the fastening plug 9 includes a thin tube section and a thick tube section. The circumferential outer wall of the thin tube section forms a sliding fit with the circumferential inner wall of the first external threaded tube 105. The outer diameter of the thick tube section is equal to the root circle diameter of the first external threaded tube 105 to ensure that the fastening plug 9 can be normally inserted. The length of the thin tube section is less than or equal to the length of the first external threaded tube 105. Three axial rectangular grooves 901 are opened on the circumferential inner wall of the inner perforation of the fastening plug 9, and the multiple rectangular grooves 901 are symmetrically distributed about the center. A retaining rack 14 is fixed to the bottom of the groove at the end of the rectangular groove 901 away from the connecting piece body 1. The width of the retaining rack 14 is less than the groove width of the rectangular groove 9C1. The whole of the retaining rack 14 is in an L-shaped structure, and a section of the retaining rack 14 away from its fixed end is a retaining flat bar. A right-angled top tooth is reserved on the side of the retaining flat bar away from the bottom of the rectangular groove 901. The extending direction of the retaining flat bar is parallel to the axis line of the fastening plug 9, and there is a gap between the retaining flat bar and the bottom of the groove. The diameter of the circle formed by all the right-angled top teeth is less than the aperture of the second external threaded tube 106, that is, the outer skin of the signal line cable can be tightly bitten. A tensioning gasket strip 13 is slidably inserted between the retaining flat bar of the retaining rack 14 and the bottom of the rectangular groove 901 at the position where it is located. A pull ring 1301 is reserved at one end of the tensioning gasket strip 13 away from the fixed end of the retaining rack 14. The thickness of one end of the tensioning gasket strip 13 away from the pull ring 1301 is greater than the thickness of other positions of its own body. Thus, after the signal line cable passes through the fastening plug 9, the tensioning gasket strip 13 can be pulled out a certain distance until its thickened end is located at the right-angled top tooth, and then the extra section is cut off. At this time, the right-angled top tooth can be pressed more tightly against the outer surface of the signal line cable, greatly improving the anti-detachment effect; One end of the bending-resistant protection spring 8 close to the expanded diameter section 801 is fixed with a combined gasket 10. The combined gasket 10 includes an ordinary annular gasket and L-shaped clamping parts 11 fixed on its surface and symmetrically distributed about the center. The inner and outer diameters of the combined gasket 10 are adapted to the dimensions of the end face of the thick tube of the fastening plug 9, and the outer diameter of the combined gasket 10 is greater than the aperture of the inner hole of the tail vertebral tube 701. The lengths of the L-shaped clamping parts 11 are in a stepped shape in turn to ensure that each L-shaped clamping part 11 can firmly fix the expanded diameter section 801 on the surface of the combined gasket 10. An inner convex hook plate 1101 is reserved at one end of the L-shaped clamping part 11 away from the fixed end, which can enhance the fixing effect on the bending-resistant protection spring 8.

[0027] Referring to Figures 10-11 , the circumferential outer wall of the tail vertebral tube 701 is arranged in a conical structure, and multiple parallel anti-slip grooves are opened on the circumferential outer wall of the tail vertebral tube 701, and an insulating tape is wound on the anti-slip grooves. The initial end of the insulating tape is fixed on the circumferential outer wall of the tail vertebral tube 701, and then it is helically wound until the bending-resistant protection spring 8 is wound. By providing the insulating tape wound on the outer walls of the tail vertebral tube 701 and the bending-resistant protection spring 8, the anti-bending effect of the bending-resistant protection spring 8 near the connecting piece body 1 can be increased.

[0028] Reference Figures 10-11 As shown in Figures 10-11 , two partition inserts 12 that are centrosymmetrically distributed are fixed on the inner circumferential wall of the caudal spinal canal 701. The overall shape of the partition insert 12 is a quarter-segment spiral structure. The pitch of the partition insert 12 is equal to the pitch of the bending-resistant protection spring 8 under the condition of no force, and the thickness of the partition insert 12 is equal to the spacing of the bending-resistant protection spring 8 under the condition of no force. The partition insert 12 is inserted into the bending-resistant protection spring 8. By setting the partition insert 12, the traction and fixation of the bending-resistant protection spring 8 can be formed again at the caudal spinal canal 701, thereby reducing the detachment of the bending-resistant protection spring 8.

[0029] Working principle: When installing this device, first rotate and fix the combined gasket 10 at the end of the enlarged diameter section of the bending-resistant protection spring 8, and then pass the bending-resistant protection spring 8 sleeved with the combined gasket 10 through the caudal spinal canal 701 from the large opening end of the clamping nut 7 for later use; then flatten the head of the signal line cable to be threaded for easy passage, and then insert the signal line cable into the bending-resistant protection spring 8 from the end far away from the combined gasket 10, and then pass through the fastening plug 9; when passing through the fastening plug 9, pull out the tensioning strip 13 for a certain distance until the thickened end of its body is located at the right-angle top tooth, and then cut off the extra section. At this time, the right-angle top tooth can press more tightly on the outer surface of the signal line cable, greatly improving the anti-detachment effect; finally, strip the signal line cable to expose the core wire, and pass the wire on the outer layer of the core wire of the signal line cable through the corresponding outer through hole 101, and then cooperate with the wire pressing mechanism on the outer wall of the clamping nut 7 to press tightly to form the transmission of the signal. Finally, pass the core wire through the inner holes of the first external threaded tube 105 and the second external threaded tube 106 in sequence, and then screw and fix the connecting piece body 1, the fastening plug 9 and the clamping nut 7 with the bending-resistant protection spring 8 together.

[0030] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0031] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A cable connector, comprising a connector body (1), the connector body (1) being made by cutting a metal material, characterized in that, The connecting piece body (1) includes an external hexagonal section (103), and an external threaded pipe one (105) and an external threaded pipe two (106) which are coaxially fixed at both ends of the external hexagonal section (103) and are of a tubular structure. The inner diameter of the external threaded pipe one (105) is equal to the outer diameter of the external threaded pipe two (106). A fastening plug (9) is slidably inserted into the inner circumferential wall of the connecting piece body (1) near one end of the external threaded pipe one (105). The fastening plug (9) is integrally of a stepped tubular structure, and the fastening plug (9) is provided with an inner perforation coaxial with the external threaded pipe two (106); the aperture of the inner perforation is larger than the aperture of the external threaded pipe two (106); the outer circumferential wall of the external threaded pipe one (105) is provided with a self-locking thread, and a clamping nut (7) is screwed on the outer circumferential wall of the external threaded pipe one (105); a tail spinal canal (701) is reserved at one end of the clamping nut (7) away from the connecting piece body (1), and the inner aperture of the tail spinal canal (701) is smaller than the aperture of the inner perforation of the fastening plug (9). A bending-resistant protection spring (8) is inserted into the inner hole of the tail spinal canal (701). One end of the bending-resistant protection spring (8) near the tail spinal canal (701) passes through the tail spinal canal (701) and is provided with an expanded diameter section (801). The diameter of the expanded diameter section (801) is larger than the aperture of the tail spinal canal (701) to ensure that the bending-resistant protection spring (8) will not fall off when pulled from the outside; the inner diameter of the bending-resistant protection spring (8) is equal to the aperture of the fastening plug (9).

2. The cable connector according to claim 1, wherein The inner circumferential walls of the external threaded pipe one (105) and the external threaded pipe two (106) are polished, and chamfers are provided at the inner circumferential edges of the pipe orifice at the junction end of the external threaded pipe one (105) and the external threaded pipe two (106).

3. The cable connector according to claim 2, characterized in that, The inner circumferential wall of the clamping nut (7) is provided with an internal thread groove (703) adapted to the self-locking thread, and sealing tape is wound around the outer circumferential wall of the external threaded pipe one (105); the inner circumferential wall of the external threaded pipe two (106) extends all the way to the junction with the inner circumferential wall of the external threaded pipe one (105), and an axially extending heat dissipation groove (107) is opened in the inner circumferential wall of the external threaded pipe two (106). The number of the axially extending heat dissipation grooves (107) is less than four, and all the axially extending heat dissipation grooves (107) are symmetrically distributed about the center; a plurality of radial holes communicating with the outside are opened at the bottom of the axially extending heat dissipation groove (107), and the axial center lines of the radial holes intersect on the axial center line of the external threaded pipe two (106).

4. A cable connector according to claim 3, wherein, An annular washer groove (104) is opened on one side of the external hexagonal section (103) away from the external threaded pipe one (105), and the center of the annular washer groove (104) falls on the axial center line of the external threaded pipe one (105). An O-ring (2) is sleeved on the outer circumferential wall of the external threaded pipe two (106) near the external hexagonal section (103), and the inner diameter of the O-ring (2) is adapted to the diameter of the annular washer groove (104); a plurality of inclined cutting grooves are provided on the outer circumferential wall of the O-ring (2).

5. A cable connector according to claim 4, characterized in that, The outer hexagonal section (103) is provided with a ring-shaped wire-hiding groove (102) on one side close to the outer threaded tube 2 (106), and the end of the outer threaded tube 2 (106) is provided with a plurality of outer through-holes (101) distributed symmetrically in the center near the outer threaded tube 1 (105), and the outlets of the outer through-holes (101) are directly opposite to the bottom of the wire-hiding groove (102).

6. The cable connector according to claim 5, characterized in that, The overall shape of the clamping nut (7) is a hexagonal prism structure, and two opposite side surfaces of the clamping nut (7) are respectively provided with a pressing mechanism that is centrally symmetrically distributed with each other; the clamping nut (7) is provided with an anti-slip groove (702) on the side surface of the pressing mechanism, and the extension direction of the anti-slip groove (702) is parallel to the axis of the external threaded tube (105), and the anti-slip groove (702) is provided with a plug-in outlet at one end close to the external hexagonal section (103), and the pressing mechanism includes an anti-twist rod (4) slidably connected in the anti-slip groove (702), and the anti-twist rod (4) is fixed with a pressing spring (6) at one end away from the external hexagonal section (103), and the anti-twist rod (4) is provided with a pressing spring (6) at one end close to the external hexagonal section (103). An arc pressure plate (3) is fixed that can be inserted into the wire storage groove (102), and the arc pressure plate (3) can move freely in the wire storage groove (102) with the axial movement and overall rotation of the anti-twist push rod (4); and the center angle of the arc pressure plate (3) is less than 180 degrees; the arc pressure plate (3) is made of metal material; and the inner diameter of the arc pressure plate (3) is larger than the outer diameter of the external threaded tube (105); a plurality of staggered anti-slip tips (301) are reserved on one side of the arc pressure plate (3) close to the bottom of the wire storage groove (102) to reduce poor contact; a rib plate is reserved near the middle of the side of the anti-twist push rod (4) away from the bottom of the groove, and a toggle ball (5) is fixed on the end of the rib plate away from the anti-twist push rod (4).

7. A cable connector according to claim 6, characterized in that, The fastening plug (9) includes a thin tube section and a thick tube section. The circumferential outer wall of the thin tube section forms a sliding fit with the circumferential inner wall of the first external thread tube (105). The outer diameter of the thick tube section is equal to the root circle diameter of the first external thread tube (105). The length of the thin tube section is less than or equal to the length of the first external thread tube (105). Three axial rectangular grooves (901) are formed on the circumferential inner wall of the inner perforation of the fastening plug (9), and multiple rectangular grooves (901) are symmetrically distributed about the center. A retaining rack (14) is fixed to the bottom of the end of the rectangular groove (901) away from the connecting piece body (1). The width of the retaining rack (14) is less than the groove width of the rectangular groove (901). The whole of the retaining rack (14) is in an L-shaped structure. A section of the retaining rack (14) away from its fixed end is a retaining flat bar, and a right-angled top tooth is reserved on the side of the retaining flat bar away from the bottom of the rectangular groove (901). The extending direction of the retaining flat bar is parallel to the axis of the fastening plug (9), and a gap is left between the retaining flat bar and the bottom of the groove. The diameter of the circle formed by all the right-angled top teeth is less than the aperture of the second external thread tube (106). A tensioning gasket strip (13) is slidably inserted between the retaining flat bar of the retaining rack (14) and the bottom of the rectangular groove (901) at the position where the retaining rack (14) is located. A pull ring (1301) is reserved at one end of the tensioning gasket strip (13) away from the fixed end of the retaining rack (14). The thickness of one end of the tensioning gasket strip (13) away from the pull ring (1301) is greater than the thickness of other positions of the tensioning gasket strip (13) itself.

8. A cable connector according to claim 7, characterized in that, A combined gasket (10) is fixed to one end of the anti-bending protection spring (8) close to the diameter-expanding section (801). The combined gasket (10) includes an ordinary annular gasket and L-shaped clamping pieces (11) fixedly arranged on its surface in a centrally symmetric manner. The inner and outer diameters of the combined gasket (10) are adapted to the dimensions of the end face of the thick tube of the fastening plug (9), and the outer diameter of the combined gasket (10) is greater than the aperture of the inner hole of the tail spinal canal (701). The lengths of the L-shaped clamping pieces (11) are in a stepped shape in sequence. An inner-ring protruding hook plate (1101) is reserved at one end of the L-shaped clamping piece (11) away from the fixed end.

9. The cable connector according to claim 7, characterized in that, The circumferential outer wall of the tail spinal canal (701) is arranged in a conical structure. Multiple mutually parallel anti-slip grooves are formed on the circumferential outer wall of the tail spinal canal (701), and an insulating tape is wound around the anti-slip grooves. The initial end of the insulating tape is fixed to the circumferential outer wall of the tail spinal canal (701), and then it is helically wound until the anti-bending protection spring (8) is wound.

10. A cable connector according to claim 9, characterized in that, Two centrally symmetrically distributed partition inserting pieces (12) are fixed to the circumferential inner wall of the tail spinal canal (701). The whole of the partition inserting piece (12) is in a quarter-section spiral structure. The pitch of the partition inserting piece (12) is equal to the pitch of the anti-bending protection spring (8) under the condition of no force, and the thickness of the partition inserting piece (12) is equal to the spacing of the anti-bending protection spring (8) under the condition of no force. And the partition inserting piece (12) is inserted into the anti-bending protection spring (8).

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