Bolt assembly

Abstract

The utility model provides a bolt assembly which comprises a shell, the shell comprises a shell body and a connecting sleeve which are connected with each other, a protective cavity and a plug port communicated with the protective cavity are defined by the shell body, and the connecting sleeve is arranged at the plug port and located in the protective cavity; the inserting strip comprises an inserting section and an inserting section which are connected with each other, the inserting section is inserted into the connecting sleeve, and the inserting section extends out of the shell; wherein at least part of the shell and the connecting sleeve are of an integrated injection molding structure, and the inserting strip is fixed in the connecting sleeve through integrated injection molding. According to the technical scheme, the technical problem that in the prior art, the structural stability of a plug pin assembly is poor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of latch assemblies, and in particular to a latch assembly. Background Art

[0002] Currently, the latch assembly in the prior art generally includes a housing and an inserting bar, wherein the inserting bar passes through the housing and is fixed by screws inside the housing.

[0003] However, the screws of the above-mentioned latch assembly are prone to loosening during use, which in turn causes the insert to loosen, thereby making the structure of the latch assembly unstable and even causing a safety hazard in use. Utility Model Content

[0004] The main purpose of the utility model is to provide a latch assembly to solve the technical problem of poor structural stability of the latch assembly in the prior art.

[0005] In order to achieve the above object, the utility model provides a latch assembly, comprising:

[0006] The housing includes a shell and a connecting sleeve connected to each other, the shell enclosing a protective cavity and a plug interface connected to the protective cavity, and the connecting sleeve is arranged at the plug interface and located in the protective cavity;

[0007] The inserting strip includes a plug-in section and an inserting section connected to each other, the plug-in section is inserted into the connecting sleeve, and the inserting section extends out of the housing;

[0008] Wherein, at least a portion of the shell and the connecting sleeve are an integral injection-molded structure, and the insert is fixed in the connecting sleeve by integral injection molding.

[0009] Furthermore, there are multiple plug interfaces and multiple connecting sleeves, and the multiple connecting sleeves are arranged in a one-to-one correspondence with the multiple plug interfaces, and each connecting sleeve is arranged at the corresponding plug interface; there are multiple inserting strips, and the multiple inserting strips are arranged in a one-to-one correspondence with the multiple connecting sleeves, and the multiple inserting strips are all fixed in the corresponding connecting sleeves through integral injection molding.

[0010] Furthermore, a first positioning portion is provided on the insert, and a second positioning portion adapted to the first positioning portion is provided in the connecting sleeve;

[0011] Wherein, one of the first positioning portion and the second positioning portion is a positioning protrusion, and the other of the first positioning portion and the second positioning portion is a positioning groove.

[0012] Furthermore, the insertion strip also includes a connecting section connected to one end of the plug-in section away from the insertion section, the connecting section extends out of the connecting sleeve and is located in the protective cavity; the latch assembly also includes a circuit board, the circuit board is fixed in the protective cavity, and the connecting section is welded to the circuit board.

[0013] Furthermore, the shell includes a first mounting shell and a second mounting shell, the first mounting shell and the second mounting shell are spliced ​​to form a protective cavity, the first mounting shell is provided with an insertion port and a connecting sleeve, and the connecting sleeve and the first mounting shell are an integral injection molding structure.

[0014] Furthermore, the latch assembly further includes a circuit board, which is fixed to the second mounting shell, and the insertion strip further includes a connecting section connected to an end of the plug section away from the insertion section, and the connecting section is welded to the circuit board; and / or,

[0015] The first mounting shell is provided with a first clamping portion, and the second mounting shell is provided with a second clamping portion adapted to the first clamping portion, and the first clamping portion is clamped and matched with the second clamping portion.

[0016] Furthermore, the shell is provided with a mounting port spaced apart from the plug interface, the mounting port is communicated with the protective cavity, and the latch assembly further includes a button, which is movably mounted at the mounting port.

[0017] Furthermore, the latch assembly further comprises:

[0018] The mounting bracket is fixedly mounted on the shell and located in the protective cavity. The mounting bracket is provided with a limiting hole adapted to at least a portion of the button, and the button is movably mounted at the limiting hole.

[0019] Furthermore, the mounting bracket includes a main body, and a limiting hole is provided on the main body; the mounting bracket also includes:

[0020] A first mounting arm is provided on one side of the main body, the first mounting arm is a bent structure and is bent to form a first bending groove, a first limiting protrusion adapted to the first bending groove is provided on the inner wall of the shell, and the first mounting arm is hung on the first limiting protrusion; and / or,

[0021] The second mounting arm is arranged on the other side of the main body. The second mounting arm is a bent structure and is bent to form a second bending groove. A second limiting protrusion adapted to the second bending groove is provided on the inner wall of the shell, and the second mounting arm is hung on the second limiting protrusion.

[0022] Furthermore, the total length of the cutting is L0, 35 mm ≤ L0 ≤ 50 mm; and / or,

[0023] There are multiple plug-in strips, including a neutral plug-in strip, a live plug-in strip and a grounding plug-in strip. The length of the plug-in section of the neutral plug-in strip is equal to the length of the plug-in section of the live plug-in strip, and the length of the plug-in section of the grounding plug-in strip is greater than the length of the plug-in section of the neutral plug-in strip.

[0024] Furthermore, the latch assembly further comprises:

[0025] A protective cover is fixedly arranged on the inner wall of the shell;

[0026] The light guide is installed in the protective cavity, the light guide is spaced apart from the insert, and the protective sleeve is sleeved on at least a portion of the light guide to position the light guide.

[0027] By applying the technical solution of the present invention, the structural stability of the insertion strip can be improved through an integrated molding setting, the connection stability between the insertion strip and the shell can be ensured, and the loosening of the insertion strip caused by repeated plugging and unplugging can be avoided, thereby better ensuring the safety of the use of the latch assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A schematic structural diagram of a first mounting housing provided in accordance with an embodiment of the present utility model from one viewing angle is shown;

[0030] Figure 2 Shown Figure 1 AA section view in the figure;

[0031] Figure 3 A schematic structural diagram of a first mounting housing provided in another perspective according to an embodiment of the present utility model is shown;

[0032] Figure 4 Shown Figure 3 BB section view in the figure;

[0033] Figure 5 A structural schematic diagram of a second mounting housing provided in accordance with an embodiment of the present utility model from one viewing angle is shown;

[0034] Figure 6 A structural schematic diagram showing another perspective of the second mounting housing provided according to an embodiment of the present utility model is shown;

[0035] Figure 7 shows a cross-sectional view of a second mounting housing provided according to an embodiment of the present utility model;

[0036] Figure 8 A schematic structural diagram of a mounting bracket according to an embodiment of the present invention is shown;

[0037] Figure 9 A schematic structural diagram of a mounting bracket and a button provided according to an embodiment of the present utility model is shown;

[0038] Figure 10A schematic structural diagram of a protective cover provided in accordance with an embodiment of the present utility model from one viewing angle is shown;

[0039] Figure 11 A schematic structural diagram of a protective cover provided in accordance with an embodiment of the present utility model from another perspective is shown;

[0040] Figure 12 A schematic structural diagram of a light guide member provided according to an embodiment of the present utility model is shown.

[0041] The above drawings include the following reference numerals:

[0042] 10. Shell;

[0043] 11. Housing; 111. First mounting housing; 1111. First clamping portion; 112. Second mounting housing; 1121. Second clamping portion;

[0044] 12. Connecting sleeve; 121. Second positioning portion;

[0045] 20. Insertion strip; 21. Insertion section; 22. Insertion section; 23. First positioning portion; 24. Connecting section;

[0046] 30. Button;

[0047] 40. Mounting bracket; 41. Positioning hole; 42. Main body; 43. First mounting arm; 44. Second mounting arm;

[0048] 50. Protective sleeve; 51. Sleeve cavity;

[0049] 60. Light guide. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] like Figures 1 to 12 As shown, an embodiment of the present invention provides a latch assembly comprising a housing 10 and an insert 20. The housing 10 comprises a shell 11 and a connecting sleeve 12, which are interconnected. The shell 11 defines a protective cavity and an insertion port communicating with the protective cavity. The connecting sleeve 12 is disposed at the insertion port and is located within the protective cavity. The insert 20 comprises an interconnected plug section 21 and an insertion section 22. The plug section 21 is inserted into the connecting sleeve 12, and the insertion section 22 extends beyond the housing 10. At least a portion of the housing 11 and the connecting sleeve 12 are integrally injection-molded, and the insert 20 is fixed within the connecting sleeve 12 by integral injection molding.

[0052] The latch assembly provided in this embodiment can improve the structural stability of the insertion strip 20 through an integrally formed arrangement, thereby avoiding the loosening of the insertion strip 20 caused by repeated insertion and removal, thereby better ensuring the safety of the latch assembly and increasing the service life of the latch assembly.

[0053] It should be noted that "at least part of the shell 11 and the connecting sleeve 12 are an integral injection-molded structure" can be understood as at least part of the shell 11 and the connecting sleeve 12 are an integral structure formed by injection molding through a mold, and at least part of the shell 11 and the connecting sleeve 12 can be made of the same material, which can be made of plastic material.

[0054] "The insert 20 is fixed within the connecting sleeve 12 via integral injection molding" can be understood as pre-placing the insert 20 at a predetermined position within the mold cavity. The insert 20 is then injection-molded into the mold cavity to form an integral structure with at least a portion of the housing 11 and the connecting sleeve 12. This integral injection molding process securely connects the insert 20 to the connecting sleeve 12. This process can also be understood as in-mold insert molding. Specifically, the insert 20 can be made of metal.

[0055] Specifically, there are multiple plug interfaces and multiple connecting sleeves 12, each corresponding to each of the plug interfaces. Each connecting sleeve 12 is positioned at a corresponding plug interface. There are multiple inserts 20, each corresponding to each of the connecting sleeves 12. Each insert 20 is fixed within the corresponding connecting sleeve 12 through integral injection molding. This ensures stable connection of the multiple inserts 20 and facilitates adapting to different requirements for the number of inserts 20, ensuring optimal connection.

[0056] Specifically, there may be three plug interfaces, corresponding to three plug strips 20 , two of the three plug strips 20 are used to connect the neutral wire and the live wire respectively, and the remaining one of the three plug strips 20 is used to connect the ground wire.

[0057] In this embodiment, the insert 20 is provided with a first positioning portion 23, and the connecting sleeve 12 is provided with a second positioning portion 121 that mates with the first positioning portion 23. One of the first positioning portion 23 and the second positioning portion 121 is a positioning protrusion, and the other is a positioning groove. This ensures better connection stability, reduces loosening, and allows for more frequent insertion and removal of the insert 20, thereby increasing the service life of the latch assembly.

[0058] Specifically, the insertion strip 20 includes a connecting section 24 connected to the end of the plug section 21 away from the insertion section 22. This section 24 extends beyond the connecting sleeve 12 and is located within the protective cavity. The latch assembly also includes a circuit board, which is secured within the protective cavity and to which the connecting section 24 is soldered. This structural arrangement changes the conventional wire-type connection method, improves the connection stability of the connecting section 24, and eliminates the risk of circuit aging that can occur with wire-type connections.

[0059] In this embodiment, the housing 11 includes a first mounting shell 111 and a second mounting shell 112, which are joined to form a protective cavity. The first mounting shell 111 is provided with an insertion port and a connecting sleeve 12, which are integrally injection-molded with the first mounting shell 111. This facilitates the integration of the insert 20 and the first mounting shell 111, improving the connection stability between the insert 20 and the first mounting shell 111 and facilitating assembly and disassembly of the first and second mounting shells 111, 112.

[0060] In this embodiment, the latch assembly also includes a circuit board, which is fixed to the second mounting shell 112. The insertion strip 20 also includes a connecting section 24 connected to the end of the plug-in section 21 away from the insertion section 22. The connecting section 24 is welded to the circuit board to ensure the connection stability of the connecting section 24 and the flexibility of disassembly and assembly of the first mounting shell 111 and the second mounting shell 112.

[0061] Specifically, the first mounting shell 111 is provided with a first clamping portion 1111, and the second mounting shell 112 is provided with a second clamping portion 1121 adapted to the first clamping portion 1111. The first clamping portion 1111 and the second clamping portion 1121 are clamped and matched. In this way, the first mounting shell 111 and the second mounting shell 112 can be easily disassembled and assembled.

[0062] In this embodiment, the housing 11 is provided with a mounting opening spaced apart from the insertion opening, which communicates with the protective cavity. The latch assembly further includes a button 30 movably mounted in the mounting opening. This facilitates adaptive operation and adjustment of corresponding operating components within the protective cavity via the button 30.

[0063] Specifically, the button 30 can be fixed in a snap-on manner, and the button 30 can be used to perform a communication function so as to determine whether to power on and whether to perform a power reduction operation.

[0064] Specifically, the latch assembly further includes a mounting bracket 40, which is fixedly mounted on the housing 11 and located within the protective cavity. The mounting bracket 40 is provided with a retaining hole 41 that mates with at least a portion of the button 30. The button 30 is movably mounted in the retaining hole 41. This structural arrangement can facilitate improved installation stability of the button 30.

[0065] In this embodiment, the mounting bracket 40 includes a main body 42 with a limiting hole 41 defined therein. The mounting bracket 40 also includes a first mounting arm 43 disposed on one side of the main body 42. The first mounting arm 43 is a bent structure formed with a first bending groove. A first limiting protrusion that mates with the first bending groove is provided on the inner wall of the housing 11, and the first mounting arm 43 is mounted on the first limiting protrusion. This facilitates installation of the mounting bracket 40.

[0066] Specifically, the mounting bracket 40 further includes a second mounting arm 44 disposed on the other side of the main body 42. The second mounting arm 44 is a bent structure formed with a second bending groove. A second stopper protrusion that mates with the second bending groove is disposed on the inner wall of the housing 11, and the second mounting arm 44 is mounted on the second stopper protrusion. This facilitates installation of the mounting bracket 40 and improves its installation stability.

[0067] Specifically, the total length of the insert 20 is L0, 35mm≤L0≤50mm, so that the total length of the insert 20 can meet normal plugging requirements while avoiding the situation where the insert 20 is too long or too short, which causes inconvenience in plugging or poor plugging effect.

[0068] Specifically, in this embodiment, there are multiple plugs 20, including a neutral plug, a live plug, and a ground plug. The length of the neutral plug's insertion section 22 is equal to that of the live plug, while the length of the ground plug's insertion section 22 is greater than that of the neutral plug. This structural arrangement ensures the stability of the entire plug assembly and makes it easier to distinguish between the neutral, live, and ground plugs, making connection easier for the user.

[0069] Specifically, the total length of the neutral wire plug and the live wire plug can be between 35 mm and 40 mm (inclusive), and the total length of the grounding plug 20 can be between 40 mm and 50 mm (inclusive).

[0070] In this embodiment, the latch assembly further includes a light guide 60, which is mounted within the protective cavity of the housing 11 and spaced apart from the insert 20. This facilitates light guidance and focusing via the light guide 60. Specifically, the light guide 60 may be a light guide column, which converges the light within the protective cavity, enhancing the focusing effect.

[0071] In this embodiment, the latch assembly further includes a protective sleeve 50, which is fixedly mounted on the inner wall of the housing 11 and positioned within the protective cavity. A light guide 60 is mounted within the protective cavity, spaced apart from the insert 20. The protective sleeve 50 is positioned over at least a portion of the light guide 60 to maintain its position and enhance its stability.

[0072] Specifically, the light guide member 60 includes a main column and two light guide protrusions spaced apart on the main column. The two light guide protrusions protrude from the outer peripheral surface of the main column. The two light guide protrusions are relatively arranged on both sides of the main column. The main column is a cylindrical structure, one end of the main column is a plane, and the other end of the main column is a conical surface.

[0073] Specifically, the protective cover 50 has a sleeve cavity 51, and the light guide 60 is fixedly installed in the sleeve cavity 51. Specifically, the protective cover 50 also has a sleeve hole communicating with the sleeve cavity 51, and the edges of both sides of the sleeve hole abut against the two light guide protrusions to better abut and limit the light guide 60.

[0074] Specifically, the protective cover 50 can be fixed to the housing 11 by screws or other connecting structures.

[0075] Specifically, the protective cover 50 may be made of an insulating material, or the protective cover 50 may be made of a transparent material.

[0076] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: integrated welding design, saying goodbye to the previous circuit connection through wiring, eliminating line aging, integrated in-mold injection molding, saying goodbye to the previous fixation of the insert 20 by screws, eliminating the hidden dangers caused by loose screws.

[0077] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0078] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0079] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0080] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0081] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A latch assembly, characterized in that: include: A housing (10), the housing (10) comprising a shell (11) and a connecting sleeve (12) connected to each other, the shell (11) enclosing a protective cavity and an insertion port communicating with the protective cavity, the connecting sleeve (12) being arranged at the insertion port and located within the protective cavity; An inserting strip (20), the inserting strip (20) comprising an inserting section (21) and an inserting section (22) connected to each other, the inserting section (21) being inserted into the connecting sleeve (12), and the inserting section (22) being extended out of the housing (10); Wherein, at least a portion of the housing (11) and the connecting sleeve (12) are an integral injection-molded structure, and the inserting strip (20) is fixed in the connecting sleeve (12) by integral injection molding.

2. The latch assembly according to claim 1, wherein: There are a plurality of plug interfaces, a plurality of connecting sleeves (12), and the plurality of connecting sleeves (12) are arranged in a one-to-one correspondence with the plurality of plug interfaces, and each connecting sleeve (12) is arranged at the corresponding plug interface; there are a plurality of inserting strips (20), and the plurality of inserting strips (20) are arranged in a one-to-one correspondence with the plurality of connecting sleeves (12), and the plurality of inserting strips (20) are all fixed in the corresponding connecting sleeves (12) through integral injection molding.

3. The latch assembly according to claim 1, wherein: A first positioning portion (23) is provided on the inserting strip (20), and a second positioning portion (121) adapted to the first positioning portion (23) is provided in the connecting sleeve (12); Wherein, one of the first positioning portion (23) and the second positioning portion (121) is a positioning protrusion, and the other of the first positioning portion (23) and the second positioning portion (121) is a positioning groove.

4. The latch assembly according to claim 1, wherein: The inserting strip (20) further comprises a connecting section (24) connected to one end of the plug-in section (21) away from the inserting section (22), the connecting section (24) extending out of the connecting sleeve (12) and located in the protective cavity; the latch assembly further comprises a circuit board, the circuit board is fixed in the protective cavity, and the connecting section (24) is welded to the circuit board.

5. The latch assembly according to claim 1, wherein: The housing (11) comprises a first mounting shell (111) and a second mounting shell (112); the first mounting shell (111) and the second mounting shell (112) are spliced ​​to enclose the protective cavity; the first mounting shell (111) is provided with the plug interface and the connecting sleeve (12); the connecting sleeve (12) and the first mounting shell (111) are an integral injection-molded structure.

6. The latch assembly according to claim 5, wherein: The latch assembly further comprises a circuit board, the circuit board being fixed on the second mounting shell (112), the insertion strip (20) further comprising a connecting section (24) connected to an end of the plug section (21) away from the insertion section (22), the connecting section (24) being welded to the circuit board; and / or, The first mounting shell (111) is provided with a first clamping portion (1111), and the second mounting shell (112) is provided with a second clamping portion (1121) adapted to the first clamping portion (1111), and the first clamping portion (1111) and the second clamping portion (1121) are clamped and matched.

7. The latch assembly according to claim 1, wherein: The housing (11) is provided with a mounting opening spaced apart from the plug interface, the mounting opening being in communication with the protective cavity, and the latch assembly further comprises a button (30) which is movably mounted at the mounting opening.

8. The latch assembly according to claim 7, wherein: The latch assembly further comprises: A mounting bracket (40) is fixedly mounted on the housing (11) and located in the protective cavity. A limiting hole (41) is provided on the mounting bracket (40) and is adapted to at least a portion of the button (30). The button (30) is movably mounted at the limiting hole (41).

9. The latch assembly according to claim 8, wherein: The mounting bracket (40) comprises a main body (42), and the limiting hole (41) is provided on the main body (42); the mounting bracket (40) further comprises: A first mounting arm (43) is provided on one side of the main body (42); the first mounting arm (43) is a bent structure and is bent to form a first bending groove; a first limiting protrusion adapted to the first bending groove is provided on the inner wall of the housing (11); the first mounting arm (43) is hung on the first limiting protrusion; and / or, The second mounting arm (44) is arranged on the other side of the main body (42), the second mounting arm (44) is a bent structure and is bent to form a second bending groove, a second limiting protrusion adapted to the second bending groove is provided on the inner wall of the shell (11), and the second mounting arm (44) is hung on the second limiting protrusion.

10. The latch assembly according to claim 1, wherein: The total length of the insert (20) is L0, 35mm≤L0≤50mm; and / or, There are a plurality of plug-in strips (20), and the plurality of plug-in strips (20) include a neutral wire plug-in strip, a live wire plug-in strip, and a grounding wire plug-in strip. The length of the plug-in section (22) of the neutral wire plug-in strip is equal to the length of the plug-in section (22) of the live wire plug-in strip, and the length of the plug-in section (22) of the grounding wire plug-in strip is greater than the length of the plug-in section (22) of the neutral wire plug-in strip.

11. The latch assembly according to any one of claims 1 to 10, characterized in that: The latch assembly further comprises: a protective cover (50), the protective cover (50) being fixedly arranged on the inner wall of the housing (11); A light guide (60) is installed in the protective cavity, the light guide (60) is spaced apart from the insert (20), and the protective cover (50) is sleeved on at least a portion of the light guide (60) to position the light guide (60).

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