9PIN connector

Abstract

The utility model belongs to the technical field of connectors, and particularly provides a 9PIN connector which comprises a plug and a socket, the plug comprises a plug shell, a first waterproof pad, a waterproof ring arranged on the outer wall face of the plug shell in a sleeving mode and nine plug terminals arranged in the plug shell, and the first waterproof pad is used for connecting the plug shell and a shell of first equipment. The socket comprises a socket shell, a second waterproof pad and nine socket terminals arranged in the socket shell, the second waterproof pad is used for connecting the socket shell and a shell of a second device, when the plug shell is inserted into the socket shell, the waterproof ring abuts against the inner wall face of the socket shell, and the nine plug terminals are connected with the nine socket terminals in a one-to-one correspondence mode. According to the 9PIN connector provided by the invention, after the plug and the socket are plugged, the waterproof requirements between the plug and the socket, between the plug and the first equipment and between the socket and the second equipment can be met.

Description

Technical Field

[0001] The present application belongs to the technical field of connectors, and in particular, relates to a 9PIN connector. Background Art

[0002] The 9-pin connector consists of a plug with 9 plug terminals and a socket with 9 socket terminals. When the plug and the socket are plugged in, the 9 plug terminals are connected one by one with the 9 socket terminals. However, the 9-pin connectors currently on the market often do not have a waterproof function, and external liquids can easily enter the connector and the device where the connector is installed. Utility Model Content

[0003] The purpose of the present application is to provide a 9PIN connector, aiming to solve the technical problem that the 9PIN connector in the prior art does not have a waterproof function and external liquids can easily enter the connector and the equipment in which the connector is installed.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a 9PIN connector, including a plug and a socket, the plug including a plug shell, a first waterproof pad, a waterproof ring sleeved on the outer wall surface of the plug shell and nine plug terminals arranged in the plug shell, the first waterproof pad is used to connect the plug shell and the shell of the first device, the socket includes a socket shell, a second waterproof pad and nine socket terminals arranged in the socket shell, the second waterproof pad is used to connect the socket shell and the shell of the second device, when the plug shell is inserted into the socket shell, the waterproof ring abuts against the inner wall surface of the socket shell, and the nine plug terminals are connected one by one with the nine socket terminals.

[0005] Furthermore, the plug housing includes a plug-in portion and a first annular mounting portion, the plug-in portion is used to be inserted into the socket housing, the waterproof ring is sleeved on the outer wall surface of the plug-in portion, the first annular mounting portion is connected to the outer wall surface of the plug-in portion, and the first waterproof pad is arranged on the side of the first annular mounting portion facing away from the socket.

[0006] Furthermore, a first mounting groove is provided on a side of the first annular mounting portion facing away from the socket, and the first waterproof pad is arranged in the first mounting groove.

[0007] Furthermore, the plug housing also includes a built-in portion, which is connected to a side of the first annular mounting portion facing away from the socket and is used to be inserted into the first device. The first waterproof pad has a first connecting hole, and the built-in portion is provided with the first connecting hole.

[0008] Furthermore, the socket housing includes a socket portion and a second annular mounting portion, the plug housing is used to be inserted into the socket portion, the second annular mounting portion is connected to the outer wall surface of the socket portion, and the second waterproof pad is arranged on the second annular mounting portion.

[0009] Furthermore, the second annular mounting portion is provided with a second mounting groove, and the second waterproof pad is arranged in the second mounting groove.

[0010] Furthermore, a second waterproof pad is arranged on a side of the second annular mounting portion facing the plug, the second waterproof pad is provided with a second connecting hole, the sleeve portion protrudes from a side of the second annular mounting portion facing the plug, and is penetrated by the second connecting hole.

[0011] Furthermore, the nine plug terminals are respectively two plug power terminals, six plug signal terminals and one plug low current terminal, and the nine socket terminals are respectively two socket power terminals, six socket signal terminals and one socket low current terminal. The two plug power terminals are plugged into the two socket power terminals one-to-one, the six plug signal terminals are plugged into the six socket signal terminals one-to-one, and the plug low current terminal is plugged into the socket low current terminal.

[0012] Furthermore, an anti-contact cap is provided at the end of the plug power terminal close to the socket power terminal.

[0013] Furthermore, one of the plug housing and the socket housing is provided with a guide column, and the other of the plug housing and the socket housing is provided with a guide hole, and the guide column is plug-fitted with the guide hole.

[0014] Compared with the prior art, the beneficial effect of the 9PIN connector provided by the present application is that: the plug housing is connected to the housing of the first device through the first waterproof pad, which can prevent external liquid from entering the first device from the gap between the plug housing and the housing of the first device; the socket housing is connected to the housing of the second device through the second waterproof pad, which can prevent external liquid from entering the second device from the gap between the socket housing and the housing of the second device; when the plug housing is inserted into the socket housing, the nine plug terminals are connected one by one with the nine socket terminals to achieve the electrical connection between the plug and the socket, and the waterproof ring mounted on the outer wall of the plug housing abuts against the inner wall of the socket housing, thereby preventing external liquid from entering the 9PIN connector, and thus avoiding external liquid from passing through the 9PIN connector and entering the first device and the second device. The 9PIN connector provided by the present application can meet the waterproof requirements between the plug and the socket, the plug and the first device, and the socket and the second device after the plug and the socket are plugged in. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of a 9-pin connector provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 The structural breakdown of the plug of the 9-pin connector shown Figure 1 ;

[0018] Figure 3 for Figure 1 The structural breakdown of the plug of the 9-pin connector shown Figure 2 ;

[0019] Figure 4 for Figure 1 The structural exploded view of the socket of the 9-pin connector is shown.

[0020] Among them, the reference numerals in the figure are:

[0021] 10. Plug; 11. Plug housing; 111. Plug-in portion; 1111. Annular groove; 112. First annular mounting portion; 1121. First mounting groove; 1122. First mounting hole; 113. Built-in portion; 12. First waterproof pad; 121. First through hole; 122. First connecting hole; 13. Waterproof ring; 141. Plug power terminal; 142. Plug signal terminal; 143. Plug low current terminal; 15. Anti-touch cap; 16. Guide hole;

[0022] 20. Socket; 21. Socket housing; 211. Socket connection portion; 212. Second annular mounting portion; 2121. Second mounting groove; 2122. Second mounting hole; 22. Second waterproof pad; 221. Second through hole; 222. Second connecting hole; 231. Socket power terminal; 232. Socket signal terminal; 233. Socket low current terminal; 24. Guide column. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0024] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] like Figure 1 As shown, an embodiment of the present application provides a 9PIN connector, including a plug 10 and a socket 20, the plug 10 includes a plug housing 11, a first waterproof pad 12, a waterproof ring 13 mounted on the outer wall surface of the plug housing 11, and nine plug terminals arranged in the plug housing 11, the first waterproof pad 12 is used to connect the plug housing 11 and the housing of a first device, the socket 20 includes a socket housing 21, a second waterproof pad 22 and nine socket terminals arranged in the socket housing 21, the second waterproof pad 22 is used to connect the socket housing 21 and the housing of a second device, when the plug housing 11 is inserted into the socket housing 21, the waterproof ring 13 abuts against the inner wall surface of the socket housing 21, and the nine plug terminals are connected one-to-one with the nine socket terminals.

[0028] The plug housing 11 is connected to the housing of the first device through the first waterproof pad 12, which can prevent external liquid from entering the first device through the gap between the plug housing 11 and the housing of the first device; the socket housing 21 is connected to the housing of the second device through the second waterproof pad 22, which can prevent external liquid from entering the second device through the gap between the socket housing 21 and the housing of the second device; when the plug housing 11 is inserted into the socket housing 21, the nine plug terminals are connected one by one with the nine socket terminals to achieve the electrical connection between the plug 10 and the socket 20, and the waterproof ring 13 mounted on the outer wall of the plug housing 11 abuts against the inner wall of the socket housing 21, thereby preventing external liquid from entering the 9PIN connector, and thus preventing external liquid from passing through the 9PIN connector and entering the first device and the second device. The 9PIN connector provided in the present application can meet the waterproof requirements between the plug 10 and the socket 20, the plug 10 and the first device, and the socket 20 and the second device after the plug 10 and the socket 20 are plugged in.

[0029] It should be noted that when the plug housing 11 is installed on the shell of the first device, the interior of the plug housing 11 is connected to the interior of the first device, and an opening is provided in the shell of the first device at a position corresponding to the plug housing 11, so that the plug terminals in the plug housing 11 can be electrically connected to the electronic components in the first device. The first waterproof pad 12 is arranged around the opening of the shell of the first device to prevent external liquid from entering the first device through the opening of the shell of the first device. When the plug 10 is plugged into the socket 20, the waterproof ring 13 can prevent external liquid from entering the interior of the plug housing 11, thereby preventing external liquid from passing through the plug housing 11 and entering the first device. When the socket housing 21 is installed on the outer shell of the second device, the interior of the socket housing 21 is connected with the interior of the second device, that is, an opening is provided in the outer shell of the second device at a position corresponding to the socket housing 21, so that the socket terminals inside the socket housing 21 can be electrically connected to the electronic components in the second device. The second waterproof pad 22 is arranged around the opening of the outer shell of the second device to prevent external liquid from entering the second device through the opening of the outer shell of the second device. When the plug 10 is plugged into the socket 20, the waterproof ring 13 can prevent external liquid from entering the interior of the socket housing 21, thereby preventing external liquid from passing through the socket housing 21 and entering the second device.

[0030] In one embodiment, Figure 2As shown, the plug housing 11 includes a plug-in portion 111 and a first annular mounting portion 112. The plug-in portion 111 is used to be inserted into the socket housing 21. The waterproof ring 13 is sleeved on the outer wall surface of the plug-in portion 111. The first annular mounting portion 112 is connected to the outer wall surface of the plug-in portion 111. The first waterproof pad 12 is arranged on the side of the first annular mounting portion 112 facing away from the socket 20. First, the first annular mounting portion 112 is set to be annular, which can fully contact the first waterproof pad 12, thereby enhancing the waterproof effect between the plug 10 and the first device; secondly, the interior of the plug-in portion 111 is connected to the interior of the first device, and the first annular mounting portion 112 is connected to the outer wall surface of the plug-in portion 111 to avoid occupying the internal space of the plug-in portion 111, thereby facilitating the connection between the plug terminals in the plug-in portion 111 and the electronic components in the first device; in addition, the first waterproof pad 12 is arranged on the side of the first annular mounting portion 112 facing away from the socket 20, that is, the first annular mounting portion 112 is connected to the outer wall surface of the outer shell of the first device through the first waterproof pad 12, that is, the first annular mounting portion 112 is installed on the outside of the first device, thereby avoiding the outer shell of the first device from interfering with the plug-in connection between the plug-in portion 111 and the socket shell 21.

[0031] In one embodiment, Figure 2 As shown, an annular groove 1111 is provided on the outer wall surface of the plug-in portion 111, and the waterproof ring 13 is arranged in the annular groove 1111. By providing the annular groove 1111 on the outer wall surface of the plug-in portion 111 and arranging the waterproof ring 13 in the annular groove 1111, on the one hand, it is convenient to install the waterproof ring 13, and on the other hand, it can play a fixing role on the waterproof ring 13 to prevent the waterproof ring 13 from shifting, thereby ensuring the waterproof effect between the plug 10 and the socket 20. Specifically, the thickness of the waterproof ring 13 is greater than the depth of the annular groove 1111, that is, the waterproof ring 13 protrudes out of the annular groove 1111 to abut against the inner wall surface of the socket housing 21.

[0032] In one embodiment, Figure 3 As shown, a first mounting groove 1121 is provided on the side of the first annular mounting portion 112 facing away from the socket 20, and the first waterproof pad 12 is arranged in the first mounting groove 1121. By providing the first mounting groove 1121 on the first annular mounting portion 112 and arranging the first waterproof pad 12 in the first mounting groove 1121, on the one hand, the installation of the first waterproof pad 12 is facilitated, and on the other hand, the first waterproof pad 12 can be fixed to avoid displacement of the first waterproof pad 12, thereby ensuring the waterproof effect between the plug 10 and the first device. Specifically, the thickness of the first waterproof pad 12 is greater than the depth of the first mounting groove 1121, that is, the first waterproof pad 12 protrudes out of the first mounting groove 1121 to abut against the housing of the first device.

[0033] In one embodiment, Figure 3As shown, the first annular mounting portion 112 is provided with a first mounting hole 1122, and the first mounting hole 1122 penetrates the first annular mounting portion 112. The first mounting hole 1122 is used for threaded fasteners to pass through, and a threaded hole is provided at a position corresponding to the first mounting hole 1122 on the housing of the first device. During installation, a threaded fastener such as a screw is passed through the first mounting hole 1122 and then threadedly connected with the threaded hole on the housing of the first device, thereby fixing the plug 10 on the housing of the first device. Specifically, a first through hole 121 is provided at a position corresponding to the first mounting hole 1122 on the first waterproof pad 12, and the threaded fastener is threadedly connected with the threaded hole on the housing of the first device after passing through the first mounting hole 1122 and the first through hole 121 in sequence.

[0034] In one embodiment, Figure 3 As shown, the plug 10 also includes a built-in part 113, which is connected to the side of the first annular mounting part 112 facing away from the socket 20 and is used to be inserted into the first device. The first waterproof pad 12 is provided with a first connection hole 122, and the built-in part 113 is penetrated with the first connection hole 122. On the one hand, by inserting the built-in part 113 into the first device, the plug 10 can be pre-fixed, which is convenient for the subsequent fixing of the first annular mounting part 112 on the housing of the first device. On the other hand, the first waterproof pad 12 is sleeved on the built-in part 113 through the first connection hole 122, which is convenient for the installation of the first waterproof pad 12, and can enhance the fixing effect of the first waterproof pad 12, avoid the displacement of the first waterproof pad 12, thereby ensuring the waterproof effect between the plug 10 and the first device. It should be noted that the interior of the built-in part 113 is connected with the interior of the plug-in part 111 and the interior of the first device, so that the plug terminal in the plug-in part 111 can be connected with the electronic components in the first device. Specifically, during installation, first, the first waterproof pad 12 is put on the built-in part 113, and the first waterproof pad 12 is pushed into the first installation groove 1121 of the first annular mounting part 112, and then the built-in part 113 is inserted into the first device from the opening of the outer shell of the first device, so that the side of the first waterproof pad 12 facing away from the first annular mounting part 112 abuts against the outer wall surface of the outer shell of the first device, and finally, the first annular mounting part 112 is fixed to the outer shell of the first device by threaded fasteners.

[0035] In one embodiment, Figure 4As shown, the socket housing 21 includes a socket portion 211 and a second annular mounting portion 212, the plug housing 11 is used to be inserted into the socket portion 211, the second annular mounting portion 212 is connected to the outer wall surface of the socket portion 211, and the second waterproof pad 22 is arranged on the second annular mounting portion 212. First, the second annular mounting portion 212 is arranged in an annular shape, which can fully contact with the second waterproof pad 22, thereby enhancing the waterproof effect between the socket 20 and the second device; secondly, the interior of the socket portion 211 is connected to the interior of the second device, and the second annular mounting portion 212 is connected to the outer wall surface of the socket portion 211 to avoid occupying the internal space of the socket portion 211, thereby facilitating the connection of the socket terminal in the socket portion 211 with the electronic components in the second device. Specifically, the socket portion 211 is plugged into the plug portion 111 of the plug housing 11. The second waterproof pad 22 can be arranged on the side of the second annular mounting portion 212 facing the plug 10, and can also be arranged on the side of the second annular mounting portion 212 facing away from the plug 10. When the second waterproof pad 22 is arranged on the side of the second annular mounting portion 212 facing the plug 10, the second annular mounting portion 212 is connected to the inner wall surface of the outer shell of the second device through the second waterproof pad 22, that is, the second annular mounting portion 212 is installed inside the second device; when the second waterproof pad 22 is arranged on the side of the second annular mounting portion 212 facing away from the plug 10, the second annular mounting portion 212 is connected to the outer wall surface of the outer shell of the second device through the second waterproof pad 22, that is, the second annular mounting portion 212 is installed outside the second device.

[0036] In one embodiment, Figure 4 As shown, the second annular mounting portion 212 is provided with a second mounting groove 2121, and the second waterproof pad 22 is arranged in the second mounting groove 2121. By providing the second mounting groove 2121 on the second annular mounting portion 212 and arranging the second waterproof pad 22 in the second mounting groove 2121, on the one hand, it is convenient to install the second waterproof pad 22, and on the other hand, it can play a fixing role on the second waterproof pad 22 to prevent the second waterproof pad 22 from shifting, thereby ensuring the waterproof effect between the socket 20 and the second device. Specifically, the thickness of the second waterproof pad 22 is greater than the depth of the second mounting groove 2121, that is, the second waterproof pad 22 protrudes out of the second mounting groove 2121 to abut against the shell of the second device.

[0037] In one embodiment, Figure 4As shown, the second annular mounting portion 212 is provided with a second mounting hole 2122, and the second mounting hole 2122 runs through the second annular mounting portion 212. The second mounting hole 2122 is used for threaded fasteners to pass through. Specifically, when the second annular mounting portion 212 is installed inside the second device, the second mounting hole 2122 is a threaded hole, and a through hole is provided at a position corresponding to the second mounting hole 2122 on the outer shell of the second device. During installation, a threaded fastener such as a screw is passed through the through hole of the outer shell of the second device and then threadedly connected to the second mounting hole 2122, thereby fixing the socket 20 on the outer shell of the second device. Specifically, the second waterproof pad 22 is provided with a second through hole 221 at a position corresponding to the second mounting hole 2122, and the threaded fastener passes through the through hole and the second through hole 221 on the outer shell of the second device in sequence and then threadedly connected to the second mounting hole 2122.

[0038] In one embodiment, Figure 4 As shown, the second waterproof pad 22 is arranged on the side of the second annular mounting portion 212 facing the plug 10, and the second waterproof pad 22 is provided with a second connection hole 222. The sleeve portion 211 protrudes from the side of the second annular mounting portion 212 facing the plug 10, and is penetrated by the second connection hole 222. The second waterproof pad 22 is sleeved on the sleeve portion 211 through the second connection hole 222, which, on the one hand, facilitates the installation of the second waterproof pad 22, and on the other hand, can enhance the fixing effect of the second waterproof pad 22, avoid the displacement of the second waterproof pad 22, thereby ensuring the waterproof effect between the socket 20 and the second device. Specifically, during installation, first, put the second waterproof pad 22 on the sleeve part 211, and push the second waterproof pad 22 into the second installation groove 2121 of the second annular mounting part 212, and then extend the sleeve part 211 out of the second device from the opening of the shell of the second device to facilitate plugging with the plug-in part 111, so that the side of the second waterproof pad 22 facing away from the second annular mounting part 212 abuts against the inner wall surface of the shell of the second device, and finally fix the second annular mounting part 212 to the shell of the second device by threaded fasteners.

[0039] In one embodiment, in combination Figure 2 and Figure 4 As shown, the nine plug terminals are respectively two plug power terminals 141, six plug signal terminals 142 and one plug low current terminal 143, and the nine socket terminals are respectively two socket power terminals 231, six socket signal terminals 232 and one socket low current terminal 233. The plug power terminals 141 are plugged in one-to-one with the two socket power terminals 231 to realize the transmission of electric energy, the six plug signal terminals 142 are plugged in one-to-one with the six socket signal terminals 232 to realize the transmission of signals, and the plug low current terminal 143 is plugged in with the socket low current terminal 233 to realize the transmission of current.

[0040] In one embodiment, Figure 2 As shown, the end of the plug power terminal 141 close to the socket power terminal 231 is provided with an anti-touch cap 15. By providing the insulating anti-touch cap 15 at the end of the plug power terminal 141 close to the socket power terminal 231, it is possible to prevent the user's hand from directly touching the plug power terminal 141, thereby avoiding the occurrence of accidental electric shock accidents and improving safety.

[0041] In one embodiment, in combination Figure 2 and Figure 4 As shown, the plug housing 11 is provided with a guide hole 16, and the socket housing 21 is provided with a guide column 24, and the guide column 24 is plugged and matched with the guide hole 16. Through the cooperation between the guide column 24 and the guide hole 16, the plug 10 and the socket 20 are accurately connected. Of course, in some other embodiments, the guide hole 16 can be reversely provided on the socket housing 21, and the guide column 24 can be reversely provided on the plug housing 11.

[0042] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A 9PIN connector, characterized in that: It comprises a plug and a socket, wherein the plug comprises a plug housing, a first waterproof pad, a waterproof ring sleeved on the outer wall surface of the plug housing, and nine plug terminals arranged in the plug housing, wherein the first waterproof pad is used to connect the plug housing and the housing of a first device; the socket comprises a socket housing, a second waterproof pad, and nine socket terminals arranged in the socket housing, wherein the second waterproof pad is used to connect the socket housing and the housing of a second device, and when the plug housing is inserted into the socket housing, the waterproof ring abuts against the inner wall surface of the socket housing, and the nine plug terminals are connected with the nine socket terminals in a one-to-one correspondence.

2. The 9-pin connector according to claim 1, characterized in that: The plug housing includes a plug-in portion and a first annular mounting portion, the plug-in portion is used to be inserted into the socket housing, the waterproof ring is sleeved on the outer wall surface of the plug-in portion, the first annular mounting portion is connected to the outer wall surface of the plug-in portion, and the first waterproof pad is arranged on the side of the first annular mounting portion facing away from the socket.

3. The 9-pin connector according to claim 2, characterized in that: A first mounting groove is provided on a side of the first annular mounting portion facing away from the socket, and the first waterproof pad is arranged in the first mounting groove.

4. The 9-pin connector according to claim 2, characterized in that: The plug housing further comprises a built-in portion, which is connected to a side of the first annular mounting portion facing away from the socket and is used for being inserted into the first device. The first waterproof pad has a first connecting hole, and the built-in portion is provided with the first connecting hole.

5. The 9-pin connector according to claim 1, characterized in that: The socket housing comprises a sleeve portion and a second annular mounting portion, the plug housing is used to be inserted into the sleeve portion, the second annular mounting portion is connected to the outer wall surface of the sleeve portion, and the second waterproof pad is arranged on the second annular mounting portion.

6. The 9-pin connector according to claim 5, characterized in that: The second annular mounting portion is provided with a second mounting groove, and the second waterproof pad is arranged in the second mounting groove.

7. The 9-pin connector according to claim 5, characterized in that: The second waterproof pad is arranged on the side of the second annular mounting portion facing the plug, the second waterproof pad is provided with a second connecting hole, the sleeve portion protrudes from the side of the second annular mounting portion facing the plug, and is penetrated by the second connecting hole.

8. The 9-pin connector according to any one of claims 1 to 7, characterized in that: The nine plug terminals are respectively two plug power terminals, six plug signal terminals and one plug low current terminal, and the nine socket terminals are respectively two socket power terminals, six socket signal terminals and one socket low current terminal. The two plug power terminals are plugged into the two socket power terminals in a one-to-one correspondence, the six plug signal terminals are plugged into the six socket signal terminals in a one-to-one correspondence, and the plug low current terminal is plugged into the socket low current terminal.

9. The 9-pin connector according to claim 8, characterized in that: An anti-contact cap is provided at the end of the plug power terminal close to the socket power terminal.

10. The 9-pin connector according to any one of claims 1 to 7, characterized in that: One of the plug housing and the socket housing is provided with a guide column, and the other of the plug housing and the socket housing is provided with a guide hole, and the guide column is plug-fitted with the guide hole.

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