fastening device

Abstract

The fixed device claimed in the application comprises a fixing support, a first inserting buckle, a second inserting buckle and a box cover. The fixing support is formed with a receiving groove, a first fixing part and a second fixing part. The receiving groove is used for receiving and fixing the connector. The first inserting buckle is arranged at the position of the first fixing part and is connected with the second fixing part as a whole, and is used for clamping the body panel. The second inserting buckle is arranged at the position of the second fixing part and is independently arranged relative to the second fixing part, and is used for clamping the body panel. The second inserting buckle can be translated relative to the second fixing part in the first direction to change the distance between the second inserting buckle and the first inserting buckle. The box cover is arranged at the position of the second fixing part and is detachably connected with the second fixing part. When the second inserting buckle clamps the body panel, the box cover and / or the second fixing part can abut against the second inserting buckle to limit the position of the second inserting buckle, so as to lock the second inserting buckle. Thus, the problem of installation difficulty caused by the manufacturing tolerance of the body panel can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of connector fixing, and in particular relates to a fixing device. Background Technology

[0002] As the number of automotive electrical devices continues to increase, so does the number of wiring harnesses and their connectors. To ensure reliable connections and prevent abnormal noises, wiring harness connectors need to be fixed to the body panels using dedicated brackets. However, since the vehicle body is composed of multiple welded sheet metal parts, manufacturing tolerances and layout limitations mean that when the two fixing points of the bracket are located on different sheet metal parts, there may be significant positional deviations between the pre-machined positioning holes. This makes it difficult to accurately install the bracket onto the two different sheet metal parts. Utility Model Content

[0003] In view of this, it is necessary to provide a fixing device for solving the above-mentioned technical problems.

[0004] A fixing device for securing a connector to a vehicle body sheet metal; the fixing device includes:

[0005] A fixed bracket is formed with a receiving groove, a first fixing part and a second fixing part. The receiving groove is disposed between the first fixing part and the second fixing part and is used to receive and fix the connector.

[0006] The first buckle is located at the position of the first fixing part and is integrated with the first fixing part to snap onto the body sheet metal.

[0007] The second buckle is disposed at the position of the second fixing part and is independently disposed relative to the second fixing part, and is used to snap the body sheet metal; and the second buckle can be translated relative to the second fixing part in a first direction to change the distance between the second buckle and the first buckle;

[0008] The lid is located at the position of the second fixing part and is detachably connected to the second fixing part;

[0009] When the second buckle is engaged with the body sheet metal, the cover and / or the second fixing part can abut and limit the second buckle to lock the second buckle.

[0010] Understandably, by adjusting the second buckle on the second fixing part, the distance between it and the first buckle can be flexibly changed, allowing the fixing bracket to adapt to the actual positional deviation of the two fixing points on the body sheet metal. This ensures that the fixing device can stably install the connector onto the body sheet metal, and the translation of the second buckle will not affect the reliability of its engagement with the body sheet metal, so that the entire fixing bracket remains stable after assembly on the body sheet metal, effectively solving the installation difficulties caused by the manufacturing tolerances of the body sheet metal.

[0011] In one embodiment, a toothed pressure plate is formed on the lid and / or the second fixing part;

[0012] The second buckle has a plurality of spring pieces formed thereon, which are disposed on two opposite sides of the second buckle in the first direction, and the plurality of spring pieces can simultaneously abut against and limit the toothed pressure plate.

[0013] Understandably, the spring pieces arranged on both opposite sides of the second buckle abut against the toothed pressure plate to limit the movement, thus achieving bidirectional locking of the second buckle and ensuring its stable locking after adjustment.

[0014] In one embodiment, both the lid and the second fixing part are formed with toothed pressure plates;

[0015] The two toothed pressure plates are disposed on two opposite sides of the second buckle in a second direction, wherein the second direction is perpendicular to the first direction.

[0016] Understandably, using two symmetrical toothed pressure plates to lock multiple second buckles can further improve the stability of locking the second buckles.

[0017] In one embodiment, the second buckle includes a buckle body, and a plurality of the spring pieces are disposed on two opposite sides of the buckle body in the first direction;

[0018] Each spring includes a first part, a second part, and a connecting part. The connecting part is inclined and connected to the first part and the second part respectively. The second part is arranged parallel to the first part and connected to the buckle body. Furthermore, the connection part between the first part and the connecting part can be inserted into the tooth groove of the toothed plate and abut against the toothed plate for limiting.

[0019] In one embodiment, the thickness of the first part is equal to the thickness of the connecting part, but less than the thickness of the second part.

[0020] It is understandable that by designing the thickness of the second fixing part to be greater than the thickness of the first fixing part and the connecting part, the elastic deformation capability of the spring can be enhanced, ensuring that the deformed spring can abut against and limit the tooth pressure plate.

[0021] In one embodiment, a sliding groove is provided on the second fixing part and / or the box cover, and the sliding groove extends along the first direction;

[0022] The second buckle has a protrusion formed thereon, the protrusion is correspondingly disposed with the slide groove, and the protrusion passes through the corresponding slide groove; and the protrusion is able to translate relative to the slide groove in the insertion direction when the second buckle is inserted into the body sheet metal.

[0023] Understandably, by utilizing the cooperative design between the protrusion and the slide, on the one hand, the translation of the second buckle on the second fixed part is linearly guided, avoiding deviation during the adjustment process; on the other hand, when the spring undergoes elastic deformation, the groove wall of the slide forms rigid support for the protrusion, thereby enhancing the spring's rebound holding force and enabling the adjusted second buckle to be quickly locked by the toothed pressure plate.

[0024] In one embodiment, the lid is snap-fitted to the second fixing part.

[0025] Understandably, the lid is attached to the second fixing part by a snap-fit ​​mechanism, which makes it easy to attach the lid to the second fixing part.

[0026] In one embodiment, the lid and the second fixing part are formed with a sliding fit structure in a second direction to guide the lid to be snapped onto the second fixing part; wherein the second direction is perpendicular to the first direction.

[0027] It is understandable that the sliding fit structure between the lid and the second fixing part is used to guide the installation of the lid. This facilitates the installation of the lid on the second fixing part and ensures the accuracy of the assembly position between the lid and the second fixing part.

[0028] In one embodiment, an abutment spring is formed on the second fixing part and / or the box cover;

[0029] When the second buckle engages with the body sheet metal, the abutment spring contacts and limits its position against the body sheet metal in a deformed manner.

[0030] Understandably, when the abutment spring is used to abut and limit the body sheet metal, the force between the two can, on the one hand, absorb assembly tolerances through the elastic deformation of the abutment spring itself, which is beneficial to the engagement between the second buckle and the body sheet metal; on the other hand, it can also keep the second fixing part in close contact with the body sheet metal at all times. This can prevent the second buckle from loosening after engagement, and can also effectively suppress vibration transmission through the distributed contact pressure of the abutment spring. Thus, while allowing a certain adjustment margin, it ensures the stability of the entire fixing bracket when it is installed on the body sheet metal for a long time.

[0031] In one embodiment, the abutment spring is formed on both the second fixing part and the box cover;

[0032] The two abutting springs are disposed on two opposite sides of the second buckle in a second direction, wherein the second direction is perpendicular to the first direction.

[0033] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0034] The fixing device claimed in this application utilizes the translational adjustment of the second buckle on the second fixing part to flexibly change the distance between it and the first buckle, so that the fixing bracket can adapt to the actual positional deviation of the two fixing points on the body sheet metal. This ensures that the fixing device can stably install the connector onto the body sheet metal, and the translational movement of the second buckle will not affect the reliability of its engagement with the body sheet metal, so that the entire fixing bracket remains stable after assembly on the body sheet metal, effectively solving the installation difficulties caused by the manufacturing tolerance of the body sheet metal. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the 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.

[0036] Figure 1 This is a schematic diagram of the fixing device provided in this application.

[0037] Figure 2 This is a structural schematic diagram of the fixing device provided in this application from another perspective.

[0038] Figure 3 An exploded view of the fixing device provided in this application.

[0039] Figure 4 for Figure 3 Enlarged view of section A.

[0040] Figure 5 This is a schematic diagram of the fixed bracket in this application.

[0041] Figure 6 This is a schematic diagram of the structure of the second buckle in this application.

[0042] Figure 7 This is a schematic diagram of the structure of the box lid in this application.

[0043] Figure 8 This is a structural diagram showing the mounting device provided in this application for attaching the connector to the vehicle body sheet metal.

[0044] Reference numerals: 100, fixing device; 10, fixing bracket; 11, receiving groove; 111, buckle; 12, first fixing part; 13, second fixing part; 131, outer wall; 132, buckle; 133, protruding rib; 20, first snap buckle; 30, second snap buckle; 31, spring piece; 311, first part; 312, second part; 313, connecting part; 314, connecting part; 32, snap buckle body; 33, protruding piece; 40, box cover; 41, slot; 42, groove; 50, toothed pressure plate; 51, toothed groove; 60, sliding groove; 61, upper groove wall; 70, abutting spring piece; 101, sliding fit structure; 200, connector; 300, body sheet metal; 310, sheet metal; 301, positioning hole. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] like Figure 8 As shown, the fixing device 100 claimed in this application is used to fix the connector 200 to the body sheet metal 300 to achieve the assembly of the connector 200 on the body sheet metal 300. Here, the body sheet metal 300 can specifically be welded together from two sheet metal pieces 310, and the fixing device 100 forms at least one fixing point with each of the two sheet metal pieces 310. It should be noted that the aforementioned connector 200 is specifically a connector structure for a wiring harness in an automobile.

[0049] like Figures 1 to 8 As shown, the fixing device 100 provided in this application includes a fixing bracket 10, a first buckle 20, a second buckle 30, and a cover 40. The fixing bracket 10 has a receiving groove 11, a first fixing part 12, and a second fixing part 13. The receiving groove 11 is located between the first fixing part 12 and the second fixing part 13 and is used to receive and fix the connector 200. The first buckle 20 is located at the position of the first fixing part 12 and is connected to the second fixing part 13 as a whole, and is used to snap onto the body sheet metal 300. The second buckle 30 is located at the position of the second fixing part 12 and the second fixing part 13. The second buckle 30 is positioned at the location of the second fixing part 13 and is independently provided relative to the second fixing part 13 for engaging the body sheet metal 300; and the second buckle 30 can be translated relative to the second fixing part 13 in the first direction X to change the distance between the second buckle 30 and the first buckle 20; the cover 40 is provided at the location of the second fixing part 13 and is detachably connected to the second fixing part 13; when the second buckle 30 engages the body sheet metal 300, the cover 40 and / or the second fixing part 13 can abut and limit the second buckle 30 for locking the second buckle 30.

[0050] As can be seen from the above, the fixing device 100 of this application utilizes the translational adjustment of the second buckle 30 on the second fixing part 13 to flexibly change the distance between it and the first buckle 20, so that the fixing bracket 10 can adapt to the actual positional deviation of the two fixing points on the body sheet metal 300. This ensures that the fixing device 100 can stably install the connector 200 onto the body sheet metal 300. At the same time, the translational movement of the second buckle 30 will not affect the reliability of its engagement with the body sheet metal 300, so that the entire fixing bracket 10 remains stable after assembly on the body sheet metal 300, effectively solving the installation difficulty problem caused by the manufacturing tolerance of the body sheet metal 300.

[0051] It should be noted that the actual positional deviation of the two fixed points on the body sheet metal 300 is small. This is because the aforementioned positional deviation is caused by the assembly error during welding of the two sheet metal pieces 310 and the manufacturing precision error during the production of the two sheet metal pieces 310. Obviously, this application can meet the usage requirements of the second buckle 30 engaging with the positioning hole 301 with the positional deviation by using the method of translating the second buckle 30 in the first direction X and adjusting the angle of the second buckle 30 with the first buckle 20 as the rotation center point.

[0052] like Figure 1 As shown, in one embodiment, the fixing bracket 10 forms a limiting buckle 111 at the position of the receiving groove 11, and the connector 200 received in the receiving groove 11 can be specifically locked and limited by the limiting buckle 111, thereby realizing the assembly limitation of the connector 200 on the fixing bracket 10. Here, the groove opening direction of the receiving groove 11 is opposite to the insertion direction of the fixing bracket 10 when it is inserted into the body sheet metal 300 through the first buckle 20 and the second buckle 30. There are two receiving grooves 11, one receiving groove 11 is used to receive the connector 200, and the other receiving groove 11 is used to receive two connectors 200 at the same time.

[0053] like Figure 3 As shown, in one embodiment, the first fixing part 12 is disposed on the part of the receiving groove 11 on the fixed bracket 10 on one side of the second direction Y, and the second fixing part 13 is disposed on the part of the receiving groove 11 on the fixed bracket 10 on one side of the first direction X. Specifically, the first fixing part 12 and the second fixing part 13 can protrude relative to the part of the receiving groove 11 on the fixed bracket 10 so that the fixed bracket 10 can be snapped onto the body sheet metal 300 by the first buckle 20 and the second buckle 30.

[0054] like Figures 3 to 5 , Figure 7 As shown, in one embodiment, a toothed pressure plate 50 is formed on the lid 40 and / or the second fixing part 13; a plurality of spring pieces 31 are formed on the second buckle 30, and the plurality of spring pieces 31 are disposed on two opposite sides of the second buckle 30 in the first direction X, and the plurality of spring pieces 31 can simultaneously abut and limit the toothed pressure plate 50. That is to say, in this embodiment, the second buckle 30 can be limited by the abutment between the spring pieces 31 on the two opposite sides and the toothed pressure plate 50, so as to achieve bidirectional locking of the second buckle 30, thereby ensuring the stable locking of the second buckle 30 after adjustment. Here, the number of spring pieces 31 is set to two. It can be understood that in other embodiments, the number of spring pieces 31 may also be four or even more in an even number.

[0055] like Figures 3 to 5 , Figure 7As shown, in this embodiment, both the lid 40 and the second fixing part 13 are provided with toothed pressure plates 50; the two toothed pressure plates 50 are disposed on two opposite sides of the second buckle 30 in the second direction Y, wherein the second direction Y is perpendicular to the first direction X. That is to say, this embodiment uses two symmetrical toothed pressure plates 50 to lock the multiple spring pieces 31 on the multiple second buckles 30 respectively, which can further improve the stability when locking the second buckles 30.

[0056] like Figure 6 As shown, in this embodiment, the second buckle 30 includes a buckle body 32, and a plurality of spring pieces 31 are disposed on two opposite sides of the buckle body 32 in the first direction X; wherein, each spring piece 31 includes a first part 311, a second part 312 and a connecting part 313, the connecting part 313 is inclined and is connected to the first part 311 and the second part 312 respectively, the second part 312 is arranged parallel to the first part 311 and is connected to the buckle body 32; and the connecting part 314 between the first part 311 and the connecting part 313 can be inserted into the tooth groove 51 of the tooth pressure plate 50 and abut against and limit the tooth pressure plate 50.

[0057] like Figure 6 As shown, in this embodiment, the thickness of the first part 311 is equal to the thickness of the connecting part 313 and less than the thickness of the second part 312. This enhances the elastic deformation capability of the spring piece 31 and ensures that the deformed spring piece 31 can abut against and limit the toothed pressure plate 50.

[0058] like Figure 4 , Figure 5 and Figure 7 As shown, in one embodiment, a groove 60 is provided on the second fixing part 13 and / or the cover 40, and the groove 60 extends along the first direction X; correspondingly, a protrusion 33 is formed on the second buckle 30, the protrusion 33 is correspondingly provided with the groove 60, and the protrusion 33 passes through the corresponding groove 60; furthermore, the protrusion 33 can be translated relative to the groove 60 in the insertion direction when the second buckle 30 is inserted into the body sheet metal 300. This provides linear guidance for the translation of the second buckle 30 on the second fixing part 13, avoiding deviation during adjustment; on the other hand, when the spring 31 undergoes elastic deformation, the upper groove wall 61 of the groove 60 forms rigid support for the protrusion 33, thereby enhancing the rebound holding force of the spring 31, so that the adjusted second buckle 30 can be quickly locked by the toothed pressure plate 50.

[0059] like Figure 5 , Figure 7 As shown, both the second fixing part 13 and the lid 40 are provided with sliding grooves 60, and when the lid 40 is connected to the second fixing part 13, the two sliding grooves 60 are arranged symmetrically. It can be understood that in other embodiments, the sliding grooves 60 may only be provided on the second fixing part 13 or the lid 40.

[0060] like Figure 3 , Figure 4 As shown, in one embodiment, the lid 40 is connected to the second fixing part 13 by a snap-fit ​​mechanism, which facilitates the assembly of the lid 40 onto the second fixing part 13. Here, when the lid 40 is snapped onto the second fixing part 13, it abuts against and limits the insertion depth of the lid 40 into the second fixing part 13 in the insertion direction. It is understood that in other embodiments, the lid 40 may also be fixed to the second fixing part 13 using screws or other connecting components.

[0061] like Figure 4 , Figure 5 and Figure 7 As shown, in this embodiment, two buckles 132 are formed on the outer wall 131 of the second fixing part 13; correspondingly, two slots 41 are provided on the lid 40, and the two slots 41 are corresponding to the two buckles 132. The lid 40 is engaged with the second fixing part 13 through the engagement between the slots 41 and the corresponding buckles 132.

[0062] like Figure 2 As shown, in this embodiment, the lid 40 and the second fixing part 13 are formed with a sliding fit structure 101 in the second direction Y, which is used to guide the lid 40 to be snapped onto the second fixing part 13. This facilitates the snapping of the lid 40 onto the second fixing part 13 and ensures the accuracy of the assembly position between the lid 40 and the second fixing part 13.

[0063] like Figure 4 , Figure 7 As shown, two protruding ribs 133 are formed on the second fixing part 13. Correspondingly, two grooves 42 are formed on the lid 40. The two grooves 42 are arranged one-to-one with the two protruding ribs 133, and the grooves 42 can be inserted into the corresponding protruding ribs 133 to form the aforementioned sliding fit structure 101. When the lid 40 is assembled onto the second fixing part 13, the grooves 42 on the lid 40 are aligned with the protruding ribs 133 on the second fixing part 13 and inserted until the slots 41 on the lid 40 engage with the latches 132 on the second fixing part 13.

[0064] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7As shown, in one embodiment, an abutment spring 70 is formed on the second fixing part 13 and / or the cover 40. When the second buckle 30 is engaged with the body sheet metal 300, the abutment spring 70 abuts and limits the body sheet metal 300 in a deformable manner. In this way, the action and reaction forces of the abutment spring 70 abutting and limiting the body sheet metal 300 can absorb assembly tolerances through the elastic deformation of the abutment spring 70 itself, which is beneficial to the engagement between the second buckle 30 and the body sheet metal 300. On the other hand, it can also keep the second fixing part 13 and the body sheet metal 300 in close contact at all times. This can prevent the second buckle 30 from loosening after engagement, and can also effectively suppress vibration transmission through the distributed contact pressure of the abutment spring 70. Thus, while allowing a certain adjustment margin, it ensures the stability of the entire fixing bracket 10 when it is installed on the body sheet metal 300 for a long time.

[0065] like Figure 4 As shown, in this embodiment, both the second fixing part 13 and the lid 40 have abutment springs 70 formed on them; the two abutment springs 70 are disposed on two opposite sides of the second buckle 30 in the second direction Y. Here, the abutment springs 70 and the lid 40 can be integrally injection molded from plastic.

[0066] like Figure 2 , Figure 8 As shown, the fixing device 100 of this application has one first buckle 20, which can be made of plastic and integrally injection molded with the fixing bracket 10; and the second buckle 30 also has one, so that when the fixing bracket 10 of this application is assembled on the body sheet metal 300, the first buckle 20 on the fixing bracket 10 can be aligned and inserted into one of the sheet metal 310 of the body sheet metal 300. Then, based on the positioning hole 301 on the other sheet metal 310 of the body sheet metal 300 for the second buckle 30 to be inserted, the fixing bracket 10 is driven to adjust the angle with the first buckle 20 as the rotation center point, and the second buckle 30 is moved in the second fixing part 13 to adjust the position. Then, the cover 40 is locked to the second fixing part 13. Finally, the second buckle 30 is inserted into the positioning hole 301 on the sheet metal 310 by pressing the fixing bracket 10, so as to realize the snap-fit ​​between the second buckle 30 and the sheet metal 310.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A fixing device for fixing a connector (200) to a vehicle body sheet metal (300); characterized in that, The fixing device (100) includes: The fixed bracket (10) has a receiving groove (11), a first fixing part (12) and a second fixing part (13). The receiving groove (11) is located between the first fixing part (12) and the second fixing part (13) and is used to receive and fix the connector (200). The first buckle (20) is located at the position of the first fixing part (12) and is connected to the first fixing part (12) as a whole, and is used to snap the body sheet metal (300). The second buckle (30) is disposed at the position of the second fixing part (13) and is independently disposed relative to the second fixing part (13) for snapping the body sheet metal (300); and the second buckle (30) can be translated relative to the second fixing part (13) in a first direction to change the distance between the second buckle (30) and the first buckle (20); The lid (40) is located at the position of the second fixing part (13) and is detachably connected to the second fixing part (13); When the second buckle (30) engages with the body sheet metal (300), the cover (40) and / or the second fixing part (13) can abut and limit the second buckle (30) to lock the second buckle (30).

2. The fixing device according to claim 1, characterized in that, A toothed pressure plate (50) is formed on the lid (40) and / or the second fixing part (13); The second buckle (30) has a plurality of spring pieces (31) formed thereon. The plurality of spring pieces (31) are disposed on two opposite sides of the second buckle (30) in the first direction, and the plurality of spring pieces (31) can simultaneously abut against the toothed pressure plate (50) for limiting.

3. The fixing device according to claim 2, characterized in that, Both the box cover (40) and the second fixing part (13) are formed with toothed pressure plates (50); The two toothed pressure plates (50) are disposed on two opposite sides of the second buckle (30) in the second direction, wherein the second direction is perpendicular to the first direction.

4. The fixing device according to claim 2, characterized in that, The second buckle (30) includes a buckle body (32), and a plurality of the spring pieces (31) are disposed on two opposite sides of the buckle body (32) in the first direction; Each spring clip (31) includes a first part (311), a second part (312), and a connecting part (313). The connecting part (313) is inclined and connected to the first part (311) and the second part (312) respectively. The second part (312) is arranged parallel to the first part (311) and connected to the buckle body (32). Furthermore, the connection part (314) between the first part (311) and the connecting part (313) can be inserted into the tooth groove (51) of the tooth pressure plate (50) and abut against and limit the tooth pressure plate (50).

5. The fixing device according to claim 4, characterized in that, The thickness of the first part (311) is equal to the thickness of the connecting part (313) and less than the thickness of the second part (312).

6. The fixing device according to claim 1, characterized in that, The second fixing part (13) and / or the box cover (40) are provided with a sliding groove (60), which extends along the first direction; The second buckle (30) has a protrusion (33) formed on it. The protrusion (33) is correspondingly arranged with the slide groove (60) and the protrusion (33) passes through the corresponding slide groove (60). Furthermore, the protrusion (33) can be translated relative to the slide groove (60) in the insertion direction when the second buckle (30) is inserted into the body sheet metal (300).

7. The fixing device according to claim 1, characterized in that, The lid (40) is connected to the second fixing part (13) by a snap-fit.

8. The fixing device according to claim 7, characterized in that, The lid (40) and the second fixing part (13) are formed with a sliding fit structure (101) in the second direction, which is used to guide the lid (40) to be snapped onto the second fixing part (13); wherein the second direction is perpendicular to the first direction.

9. The fixing device according to claim 1, characterized in that, An abutment spring (70) is formed on the second fixing part (13) and / or the box cover (40). When the second buckle (30) engages with the body sheet metal (300), the abutment spring (70) abuts and limits the body sheet metal (300) in a deformable manner.

10. The fixing device according to claim 9, characterized in that, The second fixing part (13) and the box cover (40) are both provided with the abutting spring (70). Two abutment springs (70) are disposed on two opposite sides of the second buckle (30) in a second direction, wherein the second direction is perpendicular to the first direction.

Images