Shielding assembly for a connector and connector

Abstract

This application discloses a shielding assembly for a connector and a connector. The shielding assembly includes a first shielding cover, an adapter, a support, and an elastic member. The first shielding cover is used for the connector's leads to pass through and has a first protrusion. The adapter is sleeved on the outer periphery of the first shielding cover and has an elastic portion. The support is sleeved on the outer periphery of the elastic portion and applies radial pressure to the elastic portion so that the elastic portion abuts against the first shielding cover. The elastic member is sleeved on the outer periphery of the first shielding cover. The outer diameter of both the first protrusion and the outer diameter of the adapter are larger than the inner diameter of the elastic member, thereby confining the elastic member between the adapter and the first protrusion. The elastic member is used to elastically contact the external device when the connector is installed on an external device. The shielding assembly of this application not only ensures the stability and reliability of the contact between the elastic member and the external device but also reduces the risk of the elastic member scratching the external device.

Description

Technical Field

[0001] This application relates to the field of connector technology, specifically to a shielding component and a connector. Background Technology

[0002] With the development of new energy vehicles, the number of devices installed on these vehicles is also increasing, requiring a large number of connectors to achieve high-speed data transmission and reliable electrical connections between these devices. When automotive high-voltage systems (such as batteries and motors) are operating, they generate interference signals. The shielding components on the connectors are connected to the shielding layers of the controller cylinder and leads, respectively, and the interference signals are discharged through the shielding layers of the leads.

[0003] To ensure a stable connection between the shielding assembly and the controller cylinder, the shielding assembly includes shielding springs. The shielding springs and the controller cylinder are in radial contact. However, during assembly, the shielding springs can easily scratch the cylinder, causing metal debris to be generated inside the cylinder. This metal debris can enter the controller and cause risks such as short circuits. Utility Model Content

[0004] This application provides a shielding component and connector for a connector, which can reduce the risk of elastic elements scratching external devices.

[0005] This application provides a shielding component for a connector, the shielding component comprising:

[0006] The first shielding cover is used for the connector leads to pass through, and the first shielding cover is provided with a first protrusion;

[0007] The adapter is fitted around the outer periphery of the first shielding cover and has an elastic part.

[0008] A support member is sleeved on the outer periphery of the elastic part and applies radial pressure to the elastic part so that the elastic part abuts against the first shielding cover;

[0009] The elastic element is sleeved on the outer periphery of the first shield. The outer diameter of the first protrusion and the outer diameter of the adapter are both larger than the inner diameter of the elastic element, so as to restrict the elastic element between the adapter and the first protrusion. The elastic element is used to elastically contact the external device when the connector is installed on the external device.

[0010] This application also provides a connector including a shielding component, a housing, terminals, and leads as described above, wherein the terminals are electrically connected to the leads, the leads have a shielding layer, the housing has a cavity and opposing first and second ends, the shielding component is partially housed in the cavity, an elastic element protrudes from the first end of the housing, and the shielding layer is electrically connected to the shielding component.

[0011] Beneficial effects: Compared with the prior art, the shielding assembly and connector provided in this application embodiment include a first shielding cover, an adapter, a support, and an elastic element. The elastic element is used to elastically contact the external device when the connector is installed on the external device, realizing axial contact between the elastic element and the external device, that is, the end face of the elastic element and the end face of the external device are in contact with each other. This not only ensures the stability and reliability of the contact between the elastic element and the external device, but also, compared with radial contact, avoids the generation of metal debris by scraping between the elastic element and the external device when the connector is installed on the external device. This reduces the risk of the elastic element scratching the external device, thereby ensuring the safety and stability of the external device operation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the connector of this application;

[0014] Figure 2 yes Figure 1 An exploded view of the connector shown.

[0015] Figure 3 This is a three-dimensional structural schematic diagram of an embodiment of the shielding component of this application;

[0016] Figure 4 yes Figure 3 An exploded view of the shielding assembly shown.

[0017] Figure 5 This is a schematic diagram of a planar structure of one embodiment of the connector of this application;

[0018] Figure 6 It is along Figure 5 Schematic diagram of the cross section of line AA in the middle;

[0019] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle.

[0020] Explanation of reference numerals in the attached drawings: 100, connector; 1, shielding assembly; 11, first shielding cover; 111, first protrusion; 112, first limiting part; 12, adapter; 121, elastic part; 122, second protrusion; 123, first snap-fit ​​part; 13, support member; 131, second snap-fit ​​part; 132, second limiting part; 133, third protrusion; 134, guide groove; 14, elastic member; 141, axial contact; 2, outer shell; 21, cavity; 22, first end; 23, second end; 24, mounting panel; 25, mounting hole; 26, bushing; 27, positioning part; 28, first fixing part; 3, terminal; 4, lead wire; 41, shielding layer; 5, second shielding cover; 6, first seal; 7, second seal; 8, tail clip; 81, second fixing part; 200, external device; 210, insertion hole; 220, step part. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0022] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] This application provides a shielding component for a connector and a connector, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0024] Reference Figure 1 and Figure 2One embodiment of this application provides a connector 100, including a shielding component 1, a housing 2, terminals 3, and leads 4. The terminals 3 are made of conductive material and can be electrically connected to the leads 4. The housing 2 has a cavity 21 and opposing first ends 22 and second ends 23. The shielding component 1 is partially housed in the cavity 21 and can protrude from the first end 22 of the housing 2. When the connector 100 is connected to an external device 200 (such as a controller device cylinder), one end of the shielding component 1 can abut against the external device 200.

[0025] Please refer to the details as well. Figure 3 and Figure 4 The shielding assembly 1 may include a first shielding cover 11, an adapter 12, a support 13, and an elastic element 14. The first shielding cover 11 may be cylindrical in shape and may be made of metal, such as stainless steel. The first shielding cover 11 may be formed by stamping and stretching. The first shielding cover 11 is used for the lead wire 4 of the connector 100 to pass through. The first shielding cover 11 is provided with a first protrusion 111, which may be provided at the first end 22 of the first shielding cover 11 near the outer shell 2. The first protrusion 111 may extend radially outward from the first shielding cover 11, and the first protrusion 111 may be annular or a part of an annular shape.

[0026] Reference Figure 3 and Figure 4 The adapter 12 can be made of metal and is fitted around the outer periphery of the first shielding cover 11. The adapter 12 is provided with an elastic part 121, which can elastically deform under force. The elastic part 121 is, for example, a long strip-shaped spring. Preferably, there are multiple elastic parts 121, which are evenly distributed along the circumference of the adapter 12. Preferably, there is an interference fit between the multiple elastic parts 121 and the first shielding cover 11. The elastic parts 121 can abut against the outer peripheral surface of the first shielding cover 11 to ensure the stability of the connection between the elastic parts 121 and the first shielding cover 11.

[0027] Reference Figure 3 and Figure 4 The support member 13 can be made of a non-metallic material, such as plastic. The outer diameter of the elastic part 121 when it is not under stress is larger than the inner diameter of the support member 13, so that the support member 13 is fitted around the outer periphery of the elastic part 121 and applies radial pressure to the elastic part 121, so that the elastic part 121 abuts against the first shield 11. This can further ensure the stability of the connection between the elastic part 121 and the first shield 11.

[0028] Reference Figure 3 and Figure 4The adapter 12 may be provided with a first engaging portion 123, such as a claw, and the support member 13 may be provided with a second engaging portion 131, such as a slot. The first engaging portion 123 and the second engaging portion 131 cooperate with each other to connect the adapter 12 and the support member 13. The first engaging portion 123 may have a barbed structure and is fixed to the support member 13 by an interference fit to further improve the stability of the connection between the adapter 12 and the support member 13. The number of first engaging portions 123 and second engaging portions 131 may be one or more. In this embodiment, the number of first engaging portions 123 and second engaging portions 131 is four, and the four first engaging portions 123 are evenly distributed along the circumference of the adapter 12.

[0029] Reference Figure 3 and Figure 4 The first shielding cover 11 may be provided with a first limiting part 112, such as a through hole. The support member 13 may be provided with a second limiting part 132, such as a protrusion. The first limiting part 112 and the second limiting part 132 cooperate with each other to connect the first shielding cover 11 and the support member 13. The number of the first limiting part 112 and the second limiting part 132 may be one or more. In this embodiment, there are two first limiting parts 112 and two limiting parts 132, and the two first limiting parts 112 are evenly distributed along the circumference of the first shielding cover 11.

[0030] Reference Figure 2 and Figure 4 The elastic element 14 can be made of metal and can be fitted onto the first shield 11. The elastic element 14 is located on the side of the first protrusion 111 facing the second end 23 of the outer shell 2. The outer diameter of the first protrusion 111 and the outer diameter of the adapter 12 are both larger than the inner diameter of the elastic element 14, so as to restrict the elastic element 14 between the adapter 12 and the first protrusion 111. The outer diameter of the first protrusion 111 is smaller than the outer diameter of the elastic element 14. The elastic element 14 is used to elastically contact the external device 200 when the connector 100 is disposed on the external device 200. The elastic element 14 contacts the external device 200 in an interference fit manner. The elastic element 14 is subjected to axial pressure and deforms to make the elastic element 14 elastic, thereby improving the stability of the connection between the elastic element 14 and the external device 200. When the elastic element 14 is not under force, in the axial direction, the total thickness of the elastic element 14 is preferably greater than the distance between the adapter 12 and the first protrusion 111, so that the adapter 12 and the first protrusion 111 have a clamping force on the elastic element 14, thereby ensuring the stability of the position of the elastic element 14, and thus ensuring that each position of the elastic element 14 can contact the external device 200 at the same time.

[0031] Reference Figure 2 and Figure 4The elastic element 14 can be a wave-shaped spring or a spring, or of course, other types of components. (See reference...) Figure 2 and Figure 4 When the elastic element 14 is a wave-shaped spring, the crest of the elastic element 14 forms an axial contact 141. Axial contacts 141 are formed on both the side of the elastic element 14 facing the adapter 12 and the side of the elastic element 14 facing the external device 200. In the axial direction, the distance between the axial contacts 141 on both sides is equal to the total thickness of the elastic element 14, meaning the distance between the axial contacts 141 on both sides is greater than the distance between the adapter 12 and the first protrusion 111. Having multiple axial contacts 141 can improve the reliability of the connection between the elastic element 14 and the external device 200.

[0032] In this application, the elastic element 14 is disposed on the end face of the shielding assembly 1 to achieve axial contact between the elastic element 14 and the external device 200, that is, the end face of the elastic element 14 and the end face of the external device 200 are in contact with each other. This not only ensures the stability and reliability of the contact between the elastic element 14 and the external device 200, but also, compared with radial contact, avoids the generation of metal fragments by rubbing between the elastic element 14 and the external device 200 when the connector 100 is installed on the external device 200. This reduces the risk of the elastic element 14 scratching the external device 200, thereby ensuring the safety and stability of the operation of the external device 200.

[0033] In some embodiments, a structural component (not shown) axially contacts an external device 200. This structural component includes an integrally formed wave spring and a support body. The wave spring is disposed at the end of the support body facing the external device 200. The wave spring and the support body can respectively adopt structures similar to the elastic element 14 and the first shield 11 in this application. Although the wave spring of the structural component can axially contact the external device 200, the structural component needs to be manufactured using CNC technology, which has a long processing time, resulting in high cost and significantly increasing the overall cost of the connector. In contrast, the first shield 11, adapter 12, and elastic element 14 in this application are separate assembly structures, all of which can be formed by stamping and stretching. After processing, the first shield 11, adapter 12, and elastic element 14 are independent parts, which are then assembled together to form the shielding assembly 1. The shielding assembly 1 in this application is simpler to process, reduces processing difficulty, shortens processing time, and lowers cost, thereby reducing the production cost of the connector 100 and improving the production efficiency and yield of the connector 100.

[0034] In one specific implementation, refer to Figures 2 to 4The adapter 12 has a second protrusion 122 at one end near the first protrusion 111. The elastic part 121, the first snap-fit ​​part 123, and the second protrusion 122 of the adapter 12 can be integrally formed. The elastic member 14 is located between the second protrusion 122 and the first protrusion 111. When the elastic member 14 abuts against the external device 200 and deforms, the side of the elastic member 14 facing away from the external device 200 abuts against the second protrusion 122. Preferably, the outer diameter of the second protrusion 122 is greater than or equal to the outer diameter of the elastic member 14, so that the second protrusion 122 can provide more stable support for the elastic member 14.

[0035] Reference Figure 2 , Figures 5 to 7 The support member 13 has a third protrusion 133 near the first protrusion 111. The outer diameter of the third protrusion 133 is larger than the inner diameter of the first end 22 of the outer shell 2. The third protrusion 133 protrudes from the cavity 21 of the outer shell 2 and can abut against the first end 22 of the outer shell 2, thereby ensuring that one end of the shielding component 1 can be exposed from the outer shell 2. This prevents the shielding component 1 from retracting into the cavity 21 of the outer shell 2 when subjected to axial pressure, and thus ensures stable contact between the elastic member 14 and the external device 200. A guide groove 134 can be provided on the side of the third protrusion 133 facing away from the external device 200. The first end 22 of the outer shell 2 can be engaged with the guide groove 134. This not only facilitates the installation of the shielding component 1 on the outer shell 2, but also improves the coaxiality between the shielding component 1 and the outer shell 2.

[0036] Reference Figure 2 and Figure 4 The second snap-fit ​​portion 131 can be disposed on the third protrusion 133, and the first snap-fit ​​portion 123 of the adapter 12 can snap onto the first snap-fit ​​portion 123, so that the second protrusion 122 and the third protrusion 133 come into contact with each other. The outer diameter of the third protrusion 133 is preferably greater than or equal to the outer diameter of the second protrusion 122, so that the third protrusion 133 can provide more stable support for the second protrusion 122.

[0037] In one specific implementation, refer to Figure 3 , Figure 6 and Figure 7 The lead wire 4 has a shielding layer 41, and the elastic element 14 protrudes from the first end 22 of the outer casing 2. The shielding layer 41 of the lead wire 4 can be electrically connected to the shielding assembly 1. For example, the shielding layer 41 of the lead wire 4 can be electrically connected to the first shielding cover 11 by means of welding, crimping, etc. When the elastic element 14 is connected to the external device 200, the side of the elastic element 14 facing away from the external device 200 is connected to the adapter 12. The elastic part 121 of the adapter 12 is connected to the first shielding cover 11, and the first shielding cover 11 is connected to the shielding layer 41 of the lead wire 4, thereby forming a connection of the entire shielding circuit.

[0038] Reference Figure 6 and Figure 7 The external device 200 is provided with a plug-in hole 210. When the connector 100 is connected to the external device 200, at least a portion of the shielding assembly 1 can be inserted into the plug-in hole 210. A step portion 220 is provided inside the plug-in hole 210. The diameter of the plug-in hole 210 at the step portion 220 is smaller than the outer diameter of the elastic member 14, and the diameter of the plug-in hole 210 at the step portion 220 is larger than the outer diameter of the first protrusion 111 of the first shielding cover 11, so that the first protrusion 111 can pass through the step portion 220, and the elastic member 14 can abut against the step portion 220.

[0039] In some embodiments, refer to Figure 2 and Figure 6 The connector 100 may further include a second shielding cover 5. The second shielding cover 5 may be cylindrical in shape and may be made of metal, such as stainless steel. The second shielding cover 5 may be formed by stamping and stretching. The second shielding cover 5 may be disposed in the cavity 21 of the housing 2. The first shielding cover 11 and the second shielding cover 5 are nested together with a gap, and the shielding layer 41 is held in the gap by the first shielding cover 11 and the second shielding cover 5. The outer diameter of the end of the first shielding cover 11 away from the first protrusion 111 is smaller than the inner diameter of the second shielding cover 5. The second shielding cover 5 may be fitted onto the outer periphery of the first shielding cover 11. The shielding layer 41 of the lead wire 4 may be fixed between the first shielding cover 11 and the second shielding cover 5 by a crimping process, so that the shielding layer 41 of the lead wire 4 is electrically connected to the first shielding cover 11. In another embodiment, the inner diameter of the end of the first shielding cover 11 away from the first protrusion 111 can be larger than the outer diameter of the second shielding cover 5. The first shielding cover 11 can be fitted onto the outer periphery of the second shielding cover 5. Similarly, the shielding layer 41 of the lead wire 4 can be fixed between the first shielding cover 11 and the second shielding cover 5 by a crimping process, so that the shielding layer 41 of the lead wire 4 is electrically connected to the first shielding cover 11.

[0040] Reference Figure 2 The outer casing 2 is provided with mounting holes 25 for fixing the outer casing 2 to the external device 200. In this embodiment, a mounting panel 24 may be provided on the outer casing 2, and the mounting panel 24 and the outer casing 2 may be integrally formed. The mounting holes 25 may be provided on the mounting panel 24, and the connector 100 may be installed onto the external device 200 through the mounting holes 25, for example, by screwing the connector 100 onto the external device 200 through the mounting holes 25. The number of mounting holes 25 may be one or more, and when there are multiple mounting holes 25, the multiple mounting holes 25 are evenly distributed on the mounting panel 24.

[0041] Reference Figure 2A bushing 26 may also be provided inside the mounting hole 25. The bushing 26 may be annular in shape and may be made of metal or non-metal. In this embodiment, the bushing 26 is made of metal. The metal bushing 26 can distribute the tightening force of the screw and prevent the outer shell 2 made of plastic or soft material from cracking or deforming due to excessive force.

[0042] Reference Figure 2 The first end 22 of the housing 2 is provided with a first seal 6. The first seal 6 can be located between the mounting panel 24 and the third protrusion 133 of the support member 13. When the connector 100 is installed on the external device 200, the first seal 6 enters the insertion hole 210 along with the housing 2. The first seal 6 is located between the housing 2 and the external device 200, and can ensure a sealed connection between the connector 100 and the external device 200. The first seal 6 can be made of an elastic material, such as silicone, to improve the sealing effect of the first seal 6.

[0043] Reference Figure 2 The second end 23 of the outer shell 2 may be provided with a second seal 7 and a tail clip 8. The second seal 7 may be sleeved on the outer periphery of the lead wire 4, and at least a portion of the second seal 7 may be located in the cavity 21 of the outer shell 2, so that the second seal 7 is located between the lead wire 4 and the outer shell 2. The second seal 7 is used to seal the gap between the lead wire 4 and the outer shell 2. The tail clip 8 may be sleeved on the outer periphery of both the lead wire 4 and the outer periphery of the outer shell 2. The outer shell 2 is provided with a first fixing part 28, which may be, for example, a protrusion. The tail clip 8 is provided with a second fixing part 81 corresponding to the first fixing part 28, which may be, for example, a claw. The first fixing part 28 and the second fixing part 81 cooperate with each other to fix the tail clip 8 to the outer shell 2. The second seal 7 improves the sealing performance of the connector 100. The tail clip 8 may be located on the outside of the second seal 7 and engage with the outer shell 2. The tail clip 8 can ensure the stability of the position of the second seal 7 and prevent the second seal 7 from falling off the outer shell 2.

[0044] Reference Figure 2 The second end 23 of the outer casing 2 is also provided with a positioning part 27. The positioning part 27 can be cylindrical in shape and extends toward the external device 200. The external device 200 can be provided with a positioning hole (not shown) corresponding to the positioning part 27. The positioning part 27 and the positioning hole have both positioning and guiding functions to ensure more accurate installation between the connector 100 and the external device 200.

[0045] The shielding component and connector of the connector provided in this application have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A shielding assembly for a connector, characterized in that, The shielding component (1) includes: A first shield (11) is provided for the lead wire (4) of the connector (100) to pass through. The first shield (11) is provided with a first protrusion (111). The adapter (12) is sleeved on the outer periphery of the first shield (11), and the adapter (12) is provided with an elastic part (121); A support member (13) is sleeved on the outer periphery of the elastic part (121) and applies radial pressure to the elastic part (121) so that the elastic part (121) abuts against the first shield (11); An elastic element (14) is sleeved on the outer periphery of the first shield (11). The outer diameter of the first protrusion (111) and the outer diameter of the adapter (12) are both larger than the inner diameter of the elastic element (14) to restrict the elastic element (14) between the adapter (12) and the first protrusion (111). The elastic element (14) is used to elastically contact the external device (200) when the connector is disposed on the external device (200).

2. The shielding assembly of the connector according to claim 1, characterized in that, The elastic element (14) is a wave-shaped sheet or a spring. When the elastic element (14) is a wave-shaped sheet, the crest of the elastic element (14) forms an axial contact point (141).

3. The shielding assembly of the connector according to claim 1, characterized in that, The adapter (12) has a second protrusion (122) at one end near the first protrusion (111), and the elastic member (14) is located between the second protrusion (122) and the first protrusion (111).

4. The shielding assembly of the connector according to claim 1, characterized in that, The adapter (12) is provided with a first snap-fit ​​part (123), and the support member (13) is provided with a second snap-fit ​​part (131). The first snap-fit ​​part (123) and the second snap-fit ​​part (131) cooperate with each other to connect the adapter (12) and the support member (13).

5. The shielding assembly of the connector according to claim 1, characterized in that, The first shield (11) is provided with a first limiting part (112), and the support member (13) is provided with a second limiting part (132). The first limiting part (112) and the second limiting part (132) cooperate with each other so that the first shield (11) and the support member (13) are connected to each other.

6. A connector, characterized in that, The device includes a shielding assembly (1) as described in any one of claims 1-5, a housing (2), a terminal (3) and a lead (4), wherein the terminal (3) is electrically connected to the lead (4), the lead (4) has a shielding layer (41), the housing (2) has a cavity (21) and opposing first end (22) and second end (23), the shielding assembly (1) is partially housed in the cavity (21), the elastic element (14) protrudes from the first end (22) of the housing (2), and the shielding layer (41) is electrically connected to the shielding assembly (1).

7. The connector according to claim 6, characterized in that, The connector (100) further includes a second shield (5), the first shield (11) and the second shield (5) are nested together with a gap, and the shielding layer (41) is held in the gap by the first shield (11) and the second shield (5).

8. The connector according to claim 6, characterized in that, The support member (13) has a third protrusion (133) at one end near the first protrusion (111), and the third protrusion (133) abuts against the first end (22) of the outer shell (2); The third protrusion (133) is provided with a guide groove (134), and the first end (22) of the outer shell (2) is engaged with the guide groove (134).

9. The connector according to claim 6, characterized in that, The housing (2) is provided with mounting holes (25) for fixing the housing (2) to the external device (200); and / or, The first end (22) of the housing (2) is provided with a first seal (6). When the connector (100) is installed on the external device (200), the first seal (6) is located between the housing (2) and the external device (200).

10. The connector according to claim 6, characterized in that, The second end (23) of the outer shell (2) is provided with a second sealing member (7) and a tail clip (8). The second sealing member (7) is used to seal the gap between the lead wire (4) and the outer shell (2). The tail clip (8) is simultaneously sleeved on the outer periphery of the lead wire (4) and the outer periphery of the outer shell (2). The outer shell (2) is provided with a first fixing part (28). The tail clip (8) is provided with a second fixing part (81) corresponding to the first fixing part (28). The first fixing part (28) and the second fixing part (81) cooperate with each other to fix the tail clip (8) to the outer shell (2).

Images