Terminal assembly, receptacle mechanism, plug mechanism, and round connector using the same

Abstract

To provide a round connector which reduces assembly costs, has a large assembly space for a terminal body on an insulator, has a small terminal assembly size, and has a wider range of applications.SOLUTION: A terminal assembly includes an insulator 11 and a terminal body 12 provided on the outer peripheral wall thereof.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to the technical field of connectors, and more particularly to a terminal assembly, a receptacle mechanism, a plug mechanism, and a circular connector using them. [Background technology]

[0002] Circular connectors are extremely important connectors, named for their cylindrical basic structure and circular mating surfaces. They are used to connect and transmit power, signals, and data to various devices and systems, and are widely used in industries and applications such as military engineering, aviation, medical care, and manufacturing. The terminal assemblies used in existing circular connectors on the market all have cylindrical terminal body arrays drilled into an insulator. These cylindrical terminal bodies can only be manufactured by turning, which increases manufacturing costs. Furthermore, the assembly space on the insulator is limited during assembly, causing interference between terminal bodies, making assembly even more difficult. Machine assembly is prone to damaging the surface of the terminal body, resulting in significant wear and tear. Manual assembly results in low production efficiency and high terminal body assembly costs, which keeps the selling price of circular connectors high. Furthermore, due to limitations in the turning process, the terminal bodies manufactured by turning are large in size, which limits the size of the terminal assemblies and circular connectors, limiting their use. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Utility Model No. 208955306 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a terminal assembly, a receptacle mechanism, a plug mechanism, and a circular connector using the same, which solve the problems of conventional terminal assemblies, such as high production and assembly costs, large size, and limited use.

[0005] To achieve the above object, a first technical solution of the present invention is realized as a terminal assembly including an insulator and a terminal body provided on an outer peripheral wall of the insulator.

[0006] Furthermore, a restricting groove that fits the terminal body is provided on the outer peripheral wall of the insulator, and the terminal body is positioned within the restricting groove.

[0007] Furthermore, the extension direction of the terminal body is parallel to the axis of the insulator.

[0008] The terminal assembly further includes a coaxial assembly disposed within the insulator along the axis of the insulator.

[0009] Furthermore, the end of the terminal body is flat, or the end of the terminal body has a bent portion formed so as to extend along the radial direction of the insulator, or a protrusion portion is formed on the end of the terminal body.

[0010] Furthermore, there are at least two terminal bodies, and the at least two terminal bodies are provided at an interval on the outer peripheral wall of the insulator.

[0011] A second technical solution of the present invention is realized as a receptacle mechanism including a receptacle shell assembly and the above-mentioned terminal assembly provided in the receptacle shell assembly.

[0012] Furthermore, the receptacle shell assembly includes a receptacle shell and a fixing member provided within the receptacle shell, and the terminal assembly is connected to the receptacle shell via the fixing member.

[0013] Furthermore, one end of the fixing member extends into the receptacle shell and is connected to the terminal assembly, and the other end has a bent portion formed thereon, the bent portion being connected to an end of the receptacle shell, and the end of the receptacle shell being engaged within the bent portion.

[0014] Furthermore, the bent portion is U-shaped, is attached to the end of the receptacle shell by an interference fit, and is ultrasonically bonded or glued to the receptacle shell.

[0015] Furthermore, the fixing member and the receptacle shell are engaged, the fixing member is provided with a locking block and the receptacle shell is provided with a locking groove that engages with the locking block, or the receptacle shell is provided with a locking block and the fixing member is provided with a locking groove that engages with the locking block.

[0016] Furthermore, the receptacle shell is further provided with a protective member, The protective member includes an outer protective ring and an inner protective ring, the outer protective ring being provided on the outer wall of the receptacle shell, and the inner protective ring being provided on the inner wall of the receptacle shell.

[0017] Furthermore, a nut is threadably connected to the outer wall of the receptacle shell.

[0018] A third technical solution of the present invention is realized as a plug mechanism including a plug shell assembly and the above-mentioned terminal assembly provided in the plug shell assembly.

[0019] Furthermore, the plug shell assembly includes an outer shell and an inner shell, the outer shell is fitted over the inner shell, and the terminal assembly is disposed within the inner shell.

[0020] Furthermore, the inner shell is provided with a guide member, and the outer shell is provided with a restriction hole that fits onto the guide member.

[0021] Furthermore, a restricting member is provided on the inner wall of the outer shell, and a restricting groove that fits into the restricting member is provided on the outer wall of the inner shell.

[0022] Additionally, the plug mechanism further includes a cable positioning assembly, one end of the cable positioning assembly being located within the outer shell and connected to the inner shell.

[0023] Furthermore, the cable positioning assembly includes an end cap and a cable clip provided within the end cap, one end of the end cap extending to the outside of the outer shell, an inner wall of the end cap tightening the cable clip toward the axial direction of the plug mechanism, and the other end connected to the inner shell.

[0024] A fourth technical solution of the present invention includes the above-mentioned receptacle mechanism and the above-mentioned plug mechanism, wherein the receptacle mechanism is realized as a circular connector that is compatible with the plug mechanism.

[0025] Furthermore, when the end of the terminal body in the receptacle mechanism is flat, it is fitted into and connected to a bent portion or a protruding portion of the end of the terminal body in the plug mechanism, and when it is a bent portion or a protruding portion, it is fitted into and connected to the flat end of the terminal body in the plug mechanism.

[0026] Furthermore, a positioning groove is provided in the receptacle shell assembly, and a positioning member that fits into the positioning groove is provided in the plug shell assembly.

[0027] Furthermore, a guide groove that fits onto the guide member is further provided within the receptacle shell assembly.

[0028] Compared with the prior art, the present invention has the following beneficial effects: In the terminal assembly described in the present invention, the terminal bodies are assembled on the outer wall of the insulator, which effectively avoids the drawback of the prior art that the installation space is limited when drilling an array of cylindrical terminal bodies into the insulator. Furthermore, the terminal assembly described in the present invention can be installed by machine, which does not cause wear on the terminal bodies, simplifies the assembly process, and reduces assembly costs. Furthermore, since the space on the outer wall of the insulator is large, the assembly space for the terminal bodies is correspondingly large. Furthermore, even when the same number of terminal bodies are assembled, the size of the terminal assembly is reduced, thereby expanding the range of use. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a structural perspective view of a conventional terminal assembly. [Figure 2] 1 is a structural perspective view of a terminal assembly provided in accordance with a first embodiment of the present invention; [Figure 3] 1 is a structural perspective view of a terminal body in a terminal assembly provided in accordance with a first embodiment of the present invention; [Figure 4] FIG. 10 is a structural perspective view of a receptacle mechanism provided by a second embodiment of the present invention. [Figure 5] FIG. 10 is an exploded view of a receptacle mechanism provided by a second embodiment of the present invention. [Figure 6] FIG. 10 is a structural perspective view of another receptacle mechanism provided by Example 2 of the present invention. [Figure 7] FIG. 10 is a cross-sectional view of another receptacle mechanism provided by Example 2 of the present invention. [Figure 8] FIG. 10 is a structural perspective view of a plug mechanism provided by a third embodiment of the present invention. [Figure 9] FIG. 10 is an exploded view of a plug mechanism provided by a third embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view of a plug mechanism provided by a third embodiment of the present invention. [Figure 11] FIG. 10 is a structural perspective view of a circular connector provided according to a fourth embodiment of the present invention. [Figure 12] FIG. 10 is a cross-sectional view of a circular connector provided according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in more detail below with reference to specific examples. It should be understood that the specific examples described herein are only for the purpose of illustrating the present invention, and are not intended to limit the present invention.

[0031] In the description of the present invention, it should be made clear that orientations or positional relationships indicated by terms such as "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "horizontal," etc. are based on the drawings and are merely intended to facilitate explanation of the present invention. The described devices or elements do not necessarily have a specific orientation or position, and should not be construed as limiting the present invention. In the description of the present invention, it should be made clear that, unless otherwise clearly specified or limited, the terms "attach," "couple," and "connect" should be understood broadly, for example, to mean fixedly connected, detachably connected, integrally connected, directly connected, or indirectly connected via an intermediate medium. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0032] Example 1 As shown in Figure 1, conventional terminal assemblies 1 are produced using a turning process to manufacture cylindrical terminal bodies 12 one by one. This process results in high production costs and low production efficiency for the terminal bodies 12, and limitations of the turning process result in large terminal body sizes. Furthermore, during assembly, an array of terminal bodies 12 is drilled into an insulator 11, but this process requires mechanical operation, which can easily damage and cause significant wear to the terminal bodies 12. Manual operation reduces assembly efficiency, and the large size of the terminal bodies 12 increases the overall size of the insulator 11 and the terminal assembly 1, limiting its range of application.

[0033] Furthermore, when using the terminal body 12, wire must be welded to the end, but because the terminal bodies 12 are assembled closely together, space limitations mean that the welding operation must be performed manually, further reducing assembly efficiency.

[0034] The terminal assembly provided in this embodiment has a structure as shown in FIG. 2, and includes an insulator 11 and a terminal body 12 provided on the outer peripheral wall thereof.

[0035] Based on the above structure, the terminal assembly 1 has the terminal bodies 12 assembled to the outer wall of the insulator 11, thereby effectively avoiding the drawback of the prior art that installation space is limited when drilling an array of cylindrical terminal bodies 12 into the insulator 11. Machine installation can be achieved without causing wear to the terminal bodies 12, simplifying the assembly process and reducing assembly costs. In addition, because the outer wall of the insulator 11 has a large space, the assembly space for the terminal bodies 12 is correspondingly larger, so that the size of the terminal assembly 1 assembled with the same number of terminal bodies 12 is smaller than that of a typical assembly, thereby broadening the range of uses.

[0036] In some embodiments of the present application, a restriction groove 13 that fits into the terminal body 12 is provided on the outer peripheral wall of the insulator 11, and the terminal body 12 is positioned within the restriction groove 13. The restriction groove 13 improves the stability of the connection between the terminal body 12 and the insulator 11.

[0037] In some embodiments of the present application, the terminal assembly 1 further includes a coaxial assembly 14 disposed within the insulator 11. Specifically, the coaxial assembly 14 is disposed along the axis of the insulator 11.

[0038] The number of coaxial assemblies 14 to be arranged is determined according to the needs of the user, and may be one set or two sets.

[0039] In this embodiment, the coaxial assembly 14 is provided to ensure that when the terminal assembly 1 is used in a high-frequency device, the terminal assembly 1 and the high-frequency device have sufficient impedance matching, and the use effect is good.

[0040] In some embodiments of the present application, the terminal body 12 has a flat strip-like structure, which avoids the problem that conventional cylindrical terminal bodies can only be manufactured by a turning process. The terminal body 12 described in the present invention is manufactured by press forming, which reduces production costs and is not limited in size by the manufacturing process, allowing the size of the terminal body 12 to be further reduced, thereby reducing the size of the entire terminal assembly 1 and expanding the range of use.

[0041] 3, in some embodiments of the present application, the end of the terminal body 12 is flat, or the end of the terminal body 12 is formed with a bent portion 121 extending radially along the insulator 11, or a protrusion 122 is formed on the end of the terminal body 12. In use, the terminal body 12 having the flat end is mounted in a receptacle mechanism, and the terminal body 12 having the bent portion 121 or the protrusion 122 is mounted in a plug mechanism. Alternatively, the terminal body 12 having the flat end is mounted in a plug mechanism, and the terminal body 12 having the bent portion 121 or the protrusion 122 is mounted in a receptacle mechanism.

[0042] After the plug mechanism and the receptacle mechanism are inserted, the flat end of one terminal body 12 is tightly fitted into the bent portion 121 and the protrusion 122 at the end of the other terminal body 12, ensuring the stability of the connection.

[0043] In some embodiments of the present application, there are at least two terminal bodies 12, and the at least two terminal bodies 12 are spaced apart on the outer peripheral wall of the insulator 11, and the extension direction of the terminal bodies 12 is parallel to the axis of the insulator 11.

[0044] In this embodiment, the assembly space of the terminal body 12 is the outer wall of the insulator 11, and since this area is large, the number of assembled terminal bodies 12 is not limited by the assembly space and assembly process, but can be set according to the user's needs.

[0045] The manufacturing process of the terminal assembly provided in this embodiment is specifically as follows.

[0046] A plate material of an appropriate size is cut out, and terminal bodies 12 are manufactured on one side of the plate material by press forming. Multiple terminal bodies 12 are connected via the other side of the plate material. During assembly, the plate material is moved while rotating the insulator 11, and the terminal bodies 12 are then moved again, and assembled into the regulating grooves 13 on the outer wall of the insulator 11. In the present invention, press forming is used to manufacture the terminal bodies 12, thereby reducing manufacturing costs and reducing the size of the terminal bodies 12. Furthermore, assembling the terminal bodies 12 on the outer wall of the insulator 11 increases the assembly space and eliminates the limitation on the number of assemblies. Furthermore, drilling an array of multiple terminal bodies 12 within the insulator 11 avoids the narrowing of the operating space. The terminal bodies 12 and the wire can be welded by automatic welding. Furthermore, the present invention assembles the terminal bodies 12 and the insulator 11 using the above-mentioned machine process, thereby improving the assembly efficiency of the terminal bodies 12 and the insulator 11 and reducing wear.

[0047] Example 2 The receptacle mechanism provided by this embodiment includes a receptacle shell assembly 2 and the terminal assembly 1 described in the first embodiment, as shown in FIGS.

[0048] In this embodiment, a receptacle shell assembly 2 is provided to fix the terminal assembly 1 and to facilitate mating of the receptacle mechanism with the plug mechanism.

[0049] In some embodiments of the present application, the receptacle shell assembly 2 includes a receptacle shell 21 and a fixing member 22 provided in the receptacle shell 21 , and the terminal assembly 1 is connected to the receptacle shell 21 via the fixing member 22 .

[0050] Specifically, one end of fixing member 22 extends into receptacle shell 21 and is connected to terminal assembly 1, and the other end is formed with a bent portion 221 that is connected to an end of receptacle shell 21. Bent portion 221 increases the connection strength between fixing member 22 and receptacle shell 21.

[0051] In some embodiments of the present application, the end of receptacle shell 21 is engaged within bent portion 221. Specifically, bent portion 221 is U-shaped and is engaged with receptacle shell 21 by interference fit, that is, the size of receptacle shell 21 inserted into bent portion 221 is slightly larger than the size of the opening of bent portion 221, so that fixing member 22 and receptacle shell 21 are not easily separated by external force.

[0052] In this embodiment, the fixing member 22 is provided to position and protect the terminal assembly 1, and when connecting the fixing member 22 and the receptacle shell 21, the end of the receptacle shell 21 is inserted into the U-shaped bent portion 221, and then the receptacle shell 21 and the bent portion 221 are bonded together by ultrasonic welding or adhesive, thereby stabilizing the connection between the fixing member 22 and the receptacle shell 21.

[0053] 6 and 7 , in some embodiments of the present application, fixing member 22 and receptacle shell 21 are locked together. Fixing member 22 is provided with locking blocks 222, and receptacle shell 21 is provided with locking grooves 211 that engage with locking blocks 222. Alternatively, receptacle shell 21 is provided with locking blocks 222, and fixing member 22 is provided with locking grooves 211 that engage with locking blocks 222. During assembly, terminal assembly 1 is drilled into fixing member 22, and fixing member 22 is inserted into receptacle shell 21 to a specific position until locking blocks 222 engage with locking grooves 211, thereby achieving a stable connection between fixing member 22 and receptacle shell 21, and further achieving a stable connection between terminal assembly 1 and receptacle shell 21.

[0054] In some embodiments of the present application, the receptacle shell 21 is further provided with a protective member 4, which includes an outer protective ring 41 and an inner protective ring 42, the outer protective ring 41 being provided on the outer wall of the receptacle shell 21, and the inner protective ring 42 being provided on the inner wall of the receptacle shell 21.

[0055] When the receptacle mechanism and the plug mechanism are inserted, the plug mechanism abuts against the inner protective ring 42 to form a seal structure, preventing rainwater and dust from entering the connector through the connecting portion between the two.

[0056] Specifically, an annular protrusion is provided on the outer wall of receptacle shell 21, and outer protective ring 41 is provided near the annular protrusion. When receptacle shell 21 penetrates the case wall of the equipment and is connected to the equipment, outer protective ring 41 near the annular protrusion abuts against the equipment, forming a seal at the connection between the two, preventing rainwater and dust from entering the equipment through the connection, and ensuring the waterproof and dustproof effects of the receptacle mechanism.

[0057] In some embodiments of the present application, nuts 212 are threadedly connected to the outer wall of receptacle shell 21. When receptacle shell 21 penetrates the case wall of the equipment, the annular protrusion and outer protective ring 41 in its vicinity abut on one side of the case wall of the equipment, and nut 212, which is threadedly connected to the outer wall of receptacle shell 21, abuts on the other side, thereby preventing separation of receptacle shell 21 and the equipment due to vibrations during use, etc.

[0058] Example 3 The plug mechanism provided by this embodiment includes a plug shell assembly 3 and the terminal assembly 1 described in the first embodiment, as shown in FIGS. 8 and 9, and the terminal assembly 1 is provided in the plug shell assembly 3.

[0059] In this embodiment, the plug shell assembly 3 is provided to protect the terminal assembly 1 and prevent damage to the terminal assembly 1 due to an external force collision, etc. Furthermore, by inserting the plug shell assembly 3 into the receptacle shell assembly 2, the plug mechanism and the receptacle mechanism can be mated.

[0060] In some embodiments of the present application, the plug shell assembly 3 includes an outer shell 31 and an inner shell 32 , the outer shell 31 is fitted over the inner shell 32 , and the terminal assembly 1 is disposed within the inner shell 32 .

[0061] In this embodiment, the terminal assembly 1 is fixed within the inner shell 32, which protects the terminal assembly 1, and the position of the outer shell 31 is restricted so that the outer shell 31 can move on the inner shell 32 along the axis of the plug mechanism, thereby realizing insertion and separation of the plug mechanism and the receptacle mechanism.

[0062] In some embodiments of the present application, the inner shell 32 is provided with a guide member 321, and the outer shell 31 is provided with a restriction hole 311 that fits into the guide member 321. Specifically, the guide member 321 is located within the restriction hole 311, and when the outer shell 31 is moved relative to the inner shell 32 along the axis of the plug mechanism, the guide member 321 restricts the movement direction of the restriction hole 311, thereby restricting the outer shell 31 and preventing rotation of the outer shell 31 relative to the inner shell 32.

[0063] 10 , in some embodiments of the present application, a restricting member 312 is provided on the inner wall of the outer shell 31, and a restricting groove 322 that fits into the restricting member 312 is provided on the outer wall of the inner shell 32, thereby restricting the position of the outer shell 31 and ensuring the relative position of the inner shell 32 and the terminal assembly 1 in the axial direction of the plug mechanism. When the plug mechanism and the receptacle mechanism are inserted, the outer shell 31 is pressed against the inner shell 32 in the axial direction of the plug mechanism, ensuring that the outer shell 31 and the terminal assembly 1 are simultaneously stably connected to the receptacle mechanism, and avoiding a decrease in insertion stability due to the outer shell 31 and the receptacle being inserted too tightly or too loosely.

[0064] In some embodiments of the present application, the plug mechanism further includes a cable positioning assembly 5 , one end of which is located within the outer shell 31 and fixedly connected to the inner shell 32 .

[0065] In conventional plug mechanisms, the cable and terminal assembly 1 are welded together, and the cable is easily separated from the terminal assembly 1 due to external forces, which affects the effectiveness of the plug mechanism. In this embodiment, during use, the cable passes through the cable positioning assembly 5 and is connected to the terminal assembly 1 in the inner shell 32. The cable is clamped by the cable positioning assembly 5 and is fixedly connected to the inner shell 32, which indirectly increases the strength of the connection between the cable and the terminal assembly 1 and prevents the cable from being pulled by external forces and being separated from the terminal assembly 1.

[0066] In some embodiments of the present application, the cable positioning assembly 5 includes an end cap 52 and a cable clip 51 disposed within the end cap 52, the end cap 52 having an inner wall at one end that fastens the cable clip 51 toward the axial direction of the plug mechanism and the other end that is fixedly connected to the inner shell 32.

[0067] Specifically, the other end of the end cap 52 is threadedly connected to the inner shell 32. During connection, the clamping end of the inner wall of the end cap 52 clamps the cable clip 51 toward the axis of the plug mechanism, so that the cable clip 51 clamps the cable inserted inside, thereby realizing an indirect connection between the cable and the inner shell 32.

[0068] In some embodiments of the present application, the clamping end of the inner wall of the end cap 52 extends to the outside of the outer shell 31, making it easier for the user to twist the end cap 52 to connect or disconnect the end cap 52 and the inner shell 32, and to tighten or loosen the cable by tightening or loosening the cable clip 51 toward the axis of the plug mechanism.

[0069] Example 4 As shown in FIG. 11, the circular connector provided by this embodiment includes the receptacle mechanism described in the second embodiment and the plug mechanism described in the third embodiment, and the receptacle mechanism and the plug mechanism are inserted into each other.

[0070] In some embodiments of the present application, when the end of the terminal body 12 in the receptacle mechanism is flat, it fits into and connects to the bent portion 121 or protrusion 122 at the end of the terminal body 12 in the plug mechanism, and when it is the bent portion 121 or the protrusion 122, it fits into and connects to the flat end of the terminal body 12 in the plug mechanism.

[0071] In this embodiment, one end of the two terminal bodies 12 in the receptacle mechanism and the plug mechanism is flat, and the other end is a bent portion 121 or a protrusion 122. When the receptacle mechanism and the plug mechanism are mated, the flat end is tightly fitted into the bent portion 121 or the protrusion 122, ensuring the stability of signal transmission.

[0072] As shown in FIG. 12, in some embodiments of the present application, a positioning groove 23 is provided in the receptacle shell assembly 2, and a positioning member 33 that fits into the positioning groove 23 is provided in the plug shell assembly 3.

[0073] Specifically, positioning groove 23 is provided on the inner wall of receptacle shell 21, and positioning member 33 is provided on outer shell 31 at one end thereof close to receptacle shell 21. During mating of the receptacle mechanism and the plug mechanism, outer shell 31 enters receptacle shell 21, causing positioning member 33 to engage within positioning groove 23. This prevents the receptacle mechanism and the plug mechanism from being mated too tightly or too loosely, improves the stability of the connection between them, ensures stable contact between each terminal body 12 on the receptacle mechanism and the plug mechanism, and improves the stability of signal transmission through the circular connector.

[0074] In some embodiments of the present application, a guide groove 213 that fits into the guide member 321 is further provided in the receptacle shell assembly 2 .

[0075] Specifically, guide groove 213 is provided on the inner wall of receptacle shell 21, and when the plug mechanism and receptacle mechanism are inserted, guide member 321 on inner shell 32 slides within guide groove 213, preventing incorrect insertion when inserting the cylindrical plug mechanism and receptacle mechanism and improving insertion efficiency.

[0076] The above are merely preferred specific embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily thought of by a person skilled in the art within the technical scope described in the present invention are included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined according to the claims. [Explanation of symbols]

[0077] 1 terminal assembly 11 Insulators 12 Terminal body 121 Bend 122 Protrusion 13 Regulating groove 14 Coaxial Assembly 2 Receptacle shell assembly 21 Receptacle shell 211 Locking groove 212 Nut 213 Guide groove 22 Fixing member 221 Bending part 222 Locking Block 23 Positioning groove 3 Plug shell assembly 31 outer shell 311 Restriction hole 312 Regulatory components 32 inner shell 321 Guide member 322 Regulatory Groove 33 Positioning member 4 Protective materials 41 Outer protective ring 42 Inner protection ring 5 Cable Locating Assembly 51 Cable Clip 52 End cap

Claims

1. A terminal assembly comprising an insulator and a terminal body provided on an outer peripheral wall of the insulator.

2. 2. The terminal assembly according to claim 1, wherein the outer peripheral wall of the insulator is provided with a restriction groove that fits the terminal body, and the terminal body is positioned within the restriction groove.

3. 3. The terminal assembly according to claim 2, wherein the extension direction of said terminal body is parallel to the axis of said insulator.

4. 3. The terminal assembly of claim 2, further comprising a coaxial assembly disposed within said insulator along the axis of said insulator.

5. 5. The terminal assembly according to claim 4, wherein the end of the terminal body is flat, or the end of the terminal body has a bent portion formed so as to extend along the radial direction of the insulator, or the end of the terminal body has a protrusion formed thereon.

6. 6. The terminal assembly according to claim 5, wherein there are at least two said terminal bodies, and said at least two said terminal bodies are provided at intervals on the outer peripheral wall of said insulator.

7. A receptacle mechanism comprising: a receptacle shell assembly; and the terminal assembly according to any one of claims 1 to 6 provided within the receptacle shell assembly.

8. 8. The receptacle mechanism according to claim 7, wherein the receptacle shell assembly includes a receptacle shell and a fixing member provided within the receptacle shell, and the terminal assembly is connected to the receptacle shell via the fixing member.

9. 9. The receptacle mechanism according to claim 8, wherein one end of the fixing member extends into the receptacle shell and is connected to the terminal assembly, and the other end has a bent portion formed thereon, the bent portion being connected to an end of the receptacle shell, and the end of the receptacle shell being engaged within the bent portion.

10. 9. The receptacle mechanism of claim 8, wherein the fixing member and the receptacle shell are engaged with each other, the fixing member is provided with a locking block, and the receptacle shell is provided with a locking groove that engages with the locking block, or the receptacle shell is provided with a locking block, and the fixing member is provided with a locking groove that engages with the locking block.

11. A plug mechanism comprising: a plug shell assembly; and the terminal assembly according to any one of claims 1 to 6 provided within the plug shell assembly.

12. 12. The plug mechanism of claim 11, wherein the plug shell assembly includes an outer shell and an inner shell, the outer shell being fitted over the inner shell, and the terminal assembly being disposed within the inner shell.

13. 13. The plug mechanism according to claim 12, wherein the inner shell is provided with a guide member, and the outer shell is provided with a restriction hole that fits onto the guide member.

14. 13. The plug mechanism according to claim 12, wherein a restricting member is provided on the inner wall of the outer shell, and a restricting groove that fits onto the restricting member is provided on the outer wall of the inner shell.

15. 7. A circular connector comprising: a receptacle mechanism; a plug mechanism; and the terminal assembly according to claim 1, wherein the receptacle mechanism comprises a receptacle shell assembly, the plug mechanism comprises a plug shell assembly, the terminal assemblies are respectively provided within the receptacle shell assembly and the plug shell assembly, and the receptacle mechanism and the plug mechanism are compatible with each other.

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