Wire end connector and shell thereof

Abstract

A wire end connector comprises a shell and a terminal. The shell comprises a mounting channel and a guide structure located in the mounting channel. The terminal is configured to be inserted into the mounting channel and comprises two corresponding fixing arms, the guide structure is configured to guide at least one of the two fixing arms to elastically deform, and at least one of the two fixing arms is configured to elastically recover after passing through the guide structure and be fixed in the mounting channel. Through the optimized cooperation of the guide structure and the terminal fixing arm, the wire end connector ensures the convenience of terminal assembly and the reliability of fixing the terminal on the shell.

Description

Technical Field

[0001] This disclosure relates to a connector and its housing, and more particularly to a wire-end connector and its housing. Background Technology

[0002] In existing wire-end connector designs, terminals are prone to detaching due to cable pulling, causing the connector to fail to perform its original function and even leading to safety issues such as short circuits.

[0003] To address these issues, some connectors are equipped with a Terminal Position Assurance (TPA) to ensure that the terminals remain securely inside the connector when the cable is under stress. However, equipping a TPA not only increases component costs but also requires additional installation steps, thus increasing assembly complexity.

[0004] Therefore, how to provide a wire-end connector that can be easily and reliably coupled to other components has become an important issue. Summary of the Invention

[0005] In view of this, the present disclosure provides a wire-end connector including a housing and terminals. The housing includes a mounting channel and a guide structure located within the mounting channel. The terminals are configured to be inserted into the mounting channel and include two corresponding retaining arms, wherein the guide structure is configured to guide at least one of the two retaining arms to elastically deform, and at least one of the two retaining arms is configured to be elastically restored and fixed to the mounting channel after passing through the guide structure.

[0006] In some embodiments disclosed herein, the guiding structure includes a guide groove configured to allow at least one of the two fixed arms to pass through.

[0007] In some embodiments disclosed herein, the guide structure has an offset section, the mounting channel extends axially, and the offset section is inclined to the axial direction.

[0008] In some embodiments disclosed herein, the two fixed arms extend parallel to each other.

[0009] In some embodiments disclosed herein, the mounting channel includes a stop configured to abut against at least one of the two fixed arms after elastic recovery.

[0010] In some embodiments disclosed herein, the mounting channel includes a protrusion configured to be clamped after elastic recovery by at least one of the two retaining arms.

[0011] In some embodiments disclosed herein, the width of the protrusion is less than the maximum distance between the two fixed arms when they elastically deform due to the guide structure.

[0012] In some embodiments disclosed herein, the terminal further includes a barbed spring, and the mounting channel includes a converging portion, wherein the barbed spring is configured to elastically deform as it passes through the converging portion.

[0013] In some embodiments disclosed herein, the barbed spring and the two fixing arms are located on different sides of the terminal.

[0014] In some embodiments disclosed herein, the housing includes a recess disposed in the mounting channel and configured to receive a barbed spring passing through the constriction portion.

[0015] In some embodiments disclosed herein, the terminal includes a contact portion, the mounting channel includes a first channel portion and a second channel portion that are interconnected, the width of the second channel portion being greater than the width of the first channel portion, and wherein the contact portion is configured to pass through the first channel portion first and then be received in the second channel portion.

[0016] This disclosure further provides a wire-end connector housing, including a body, at least one mating portion, and at least one mounting channel. The mating portion extends from the side of the body. The mounting channel passes through the body and the mating portion, with one end of the mounting channel forming a mounting opening in the body and the other end forming a mating opening in the mating portion. The mounting channel is internally provided with a guide structure and a positioning structure. The guide structure has a guide groove and an offset section. The guide groove extends along the mounting direction, and the offset section forms an acute angle with the mounting direction. The positioning structure connects to the offset section.

[0017] In some embodiments disclosed herein, the positioning structure includes a positioning surface, wherein the distance between the side of the positioning surface away from the offset segment and the mounting opening is equal to or less than the distance between the other side of the positioning surface near the offset segment and the mounting opening.

[0018] In some embodiments disclosed herein, the body has windows on its side to expose the positioning surface.

[0019] In some embodiments disclosed herein, the offset segment is an inclined groove that communicates with the guide groove.

[0020] In some embodiments disclosed herein, the wire-end connector housing further includes a snap-fit ​​structure that connects to the body and extends along the mounting direction, wherein the width of the snap-fit ​​structure at the end furthest from the mating portion is greater than the width at the other end closest to the mating portion.

[0021] In summary, this disclosure utilizes an internal guide structure and a corresponding fixing arm design on the terminal. During terminal insertion into the mounting channel, the guide structure guides at least one fixing arm to elastically deform and move outward. After passing through the guide structure, the fixing arm elastically returns to its original position, thus firmly securing the terminal within the mounting channel without the need for additional locking parts or complex assembly steps. If the terminal further includes a barbed spring and the mounting channel has a convergence portion, the barbed spring will elastically deform as it passes through the convergence portion during terminal insertion. Once past the convergence portion, the barbed spring elastically returns to its original position and engages behind the convergence portion, forming a second securing mechanism. This further enhances the terminal's securing strength and reliability within the mounting channel, preventing accidental loosening. Attached Figure Description

[0022] To gain a more complete understanding of the embodiments and their advantages, the following description is made in conjunction with the accompanying drawings.

[0023] Figure 1 This invention discloses a perspective view of the wire-end connector in some embodiments.

[0024] Figure 2 for Figure 1 The image shows a three-dimensional schematic diagram of the terminals of a wire connector.

[0025] Figure 3 for Figure 1 The image shows a front view of the wire connector's terminals being inserted into the housing.

[0026] Figure 4 for Figure 1 The diagram shows the back of the housing where the terminals of the wire connector are inserted.

[0027] Figure 5 It is based on Figure 1 The cross-sectional view of the wire-end connector is drawn by the secant line A in the figure.

[0028] Figure 6 It is based on Figure 1 The cross-sectional view of the wire-end connector is drawn by secant line A in the figure, where Figure 5 and Figure 6 The wire connectors are in different states.

[0029] Figure 7 It is based on Figure 1 The cross-sectional view of the wire-end connector is drawn using the secant line B in the diagram.

[0030] Figure 8 It is based on Figure 1 The cross-sectional view of the wire-end connector is drawn using the secant line C.

[0031] Figure 9 It is based on Figure 1The cross-sectional view of the wire-end connector is drawn by the secant line C in the figure. Figure 8 and Figure 9 They are in different states.

[0032] Figure label:

[0033] 100: Wire connector

[0034] 110: Shell

[0035] 111: Installation Channel

[0036] 111a: Convergence

[0037] 111b: First passage section

[0038] 111c: Second Channel Section

[0039] 112:Ontology

[0040] 113: Guiding Structure

[0041] 113a: Guide groove

[0042] 113b: Offset segment

[0043] 113c: Positioning Structure

[0044] 113d: Positioning surface

[0045] 113e: Protrusion

[0046] 114: Docking Section

[0047] 115: Groove

[0048] 116: Window

[0049] 117: Front and side views

[0050] 118: Snap-fit ​​structure

[0051] 119: Rear side

[0052] 130:Terminal

[0053] 131: Fixed arm

[0054] 131a: Abutment surface

[0055] 132:Contact Department

[0056] 133: Barbed Shrapnel

[0057] 134: Cable connection part

[0058] 200: Cable

[0059] A, B, C: Cutting lines

[0060] D 1: Width

[0061] D 2: Spacing

[0062] H: Height

[0063] W1, W2: Width

[0064] X, Y, Z: Axial axes

[0065] X 1: Installation direction Detailed Implementation

[0066] The embodiments disclosed herein will now be discussed in detail. However, it will be understood that the embodiments provide many applicable concepts that can be implemented in a wide variety of specific contexts. The discussed and disclosed embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0067] Please also refer to Figures 1 to 8 . Figure 1 This is a perspective view of the wire connector 100 disclosed herein. Figure 2 for Figure 1 A three-dimensional schematic diagram of terminal 130 of the center line connector 100. Figure 3 for Figure 1 A front view of the center line connector 100 with its terminal 130 inserted into the housing 110. Figure 4 for Figure 1 A schematic diagram of the back of the housing 110 where the terminal 130 of the center line connector 100 is inserted. Figure 5 It is based on Figure 1 A cross-sectional view of the wire connector 100 with terminal 130 inserted into housing 110, drawn by line A in the middle. Figure 6 It is based on Figure 1 The cross-sectional view of the wire connector 100, drawn by line A, shows the insertion of terminal 130 into housing 110. Figure 5 and Figure 6 The center line connector 100 is in different states. Figure 7 It is based on Figure 1 The cross-sectional view of the wire connector 100 is shown by line B. The wire connector 100 mainly includes a housing 110 and at least one terminal 130 (there may be multiple terminals 130), wherein the terminal 130 can connect a cable 200 and be assembled into the housing 110 for electrical connection to other components. Furthermore, for ease of description, axes X, Y, and Z are defined here, wherein axes X, Y, and Z are mutually perpendicular and serve as a reference for describing the relative positions, arrangement relationships, and directions of forces of the components.

[0068] The housing 110 is made of an insulating material and includes at least one mounting channel 111 (there may be multiple mounting channels 111) for receiving terminals 130. Specifically, the mounting channel 111 is an elongated channel extending along the axial direction X (a first direction), and the terminals 130 can enter the housing 110 along the mounting direction X1 (insertion direction) (the mounting direction X1 is a linear direction along the axial direction X). More specifically, the mounting channel 111 penetrates the housing 110 and extends from the front end to the rear end of the housing 110, forming a insertion opening on the front side 117 and a mounting opening on the rear side 119 of the housing 110. A guide structure 113 is provided inside the mounting channel 111 (e.g., on its side or top wall), wherein the guide structure 113 is located on the path of the terminals 130 inserted into the mounting channel 111 along the mounting direction X1. In this embodiment, the guide structure 113 includes a guide groove 113a that extends generally along the mounting direction X1. In this embodiment, the housing 110 includes a body 112 and at least one mating portion 114, which is configured to be inserted into a mating connector. The mating portion 114 has a cylindrical structure and extends forward from one side of the body 112. A mounting channel 111 passes through the body 112 and the mating portion 114, while a mounting opening is formed on the other side of the body 112, and an insertion opening is formed at the front end of the mating portion 114. The housing 110 also has a snap-fit ​​structure 118 located at the top of the body 112. The snap-fit ​​structure 118 connects to the body 112 and extends along the axial direction X, wherein the snap-fit ​​structure 118 is configured to engage with the mating connector to stabilize the mating state of the wire connector 100 and the mating connector. The width of the rear end (the end away from the mating portion 114) of the snap-fit ​​structure 118 is greater than the width of the front end (the other end near the mating portion 114), which facilitates user operation.

[0069] Terminal 130 is made of metal, alloy (e.g., copper alloy), or elastic alloy by stamping, cutting, or other machining processes. Terminal 130 includes a retaining arm 131 for engaging mounting channel 111, a contact portion 132 on the front side, and a cable connection portion 134 on the rear side, wherein the contact portion 132 is used for electrical contact with additional components, and the cable connection portion 134 is used for crimping cable 200. Specifically, the retaining arm 131 is an elastic body extending outward from the same side of the body of terminal 130 and has an abutment surface 131a located on one side of the retaining arm 131 (the side closer to cable connection portion 134) and parallel to a second direction. In this embodiment, the second direction is axial Z, therefore the abutment surface 131a is perpendicular to the mounting direction X1. In its natural state (e.g.) Figure 1As shown, the two fixing arms 131 are straight arms that extend roughly parallel to each other, and there is a preset distance between the two fixing arms 131. This design helps to position the terminal 130 when it is inserted into the mounting channel 111.

[0070] Next, please refer to the following: Figure 6 and Figure 7 . Figure 6 and Figure 7 The process of assembling terminal 130 into housing 110 is described. When terminal 130 is pushed into mounting channel 111, two retaining arms 131 travel to the position of guide structure 113 and advance along guide groove 113a. The end of guide structure 113 has offset section 113b, which connects to guide groove 113a. Due to the guiding effect of offset section 113b, at least one or both of the two retaining arms 131 are subjected to a force that deflects them, causing elastic deformation of the retaining arms 131, resulting in the two retaining arms 131 temporarily moving away from each other (e.g., expanding axially in the Y direction), so that the two retaining arms 131 deform sufficiently to allow the retaining arms 131 to pass over offset section 113b. In this deformed state (the process of passing over offset section 113b), the extension directions of the two retaining arms 131 are no longer parallel to each other. In this embodiment, the offset segment 113b is an oblique groove that communicates with the guide groove 113a, and the main extension direction of the oblique groove and the main extension direction of the guide groove 113a (approximately equivalent to the installation direction X1) have an acute angle.

[0071] After the fixed arm 131 passes the offset section 113b, it will quickly return to a position close to its original state due to the elasticity of its material. During or after this elastic recovery process, the two fixed arms 131 approach each other along the Y-axis and return to a nearly parallel state, and the two fixed arms 131 engage in the mounting channel 111 (see reference). Figure 6 This effectively prevents the terminal 130 from being pulled out of the housing 110. Specifically, the mounting channel 111 has a positioning structure 113c, and the two fixing arms 131 that cross the offset section 113b are engaged with the positioning structure 113c. In this embodiment, the positioning structure 113c is connected to the offset section 113b, and the positioning structure 113c has a positioning surface 113d (or stop). The positioning surface 113d and the abutment surface 131a of the fixing arm 131 face each other and abut against each other when the terminal 130 is subjected to tension, thereby offsetting the tension and preventing the terminal 130 from being pulled out. The positioning surface 113d has a remote side and a proximal side. The remote side is farther away from the offset section 113b than the proximal side, and the distance between the remote side and the rear side surface 119 (the location of the mounting opening) is approximately equal to or less than the distance between the proximal side and the rear side surface 119. See also... Figure 4The positioning structure 113c forms a window 116 on one side of the housing 110 (e.g., the side where the mating portion 114 extends from the body 112) to expose the positioning surface 113d. In this embodiment, the window 116 is aligned with the positioning surface 113d in the axial direction X (installation direction X1). The user can check through the window 116 whether the fixing arm 131 has reached the positioning surface 113d, and thus confirm whether the terminal 130 has been installed.

[0072] It should be noted that the specific forms of the guide structure 113 and the fixing arm 131 can vary. For example, the guide structure 113 can be unilateral, causing only one fixing arm 131 to elastically deform. However, the guide structure 113 can also be unilateral, causing both fixing arms 131 to elastically deform; this disclosure is not limited to this. In summary, the wire connector 100 provided by this disclosure, through the ingenious combination of the guide structure 113 and the fixing arm 131 of the terminal 130, enables the terminal 130 to be conveniently inserted into the housing 110 and reliably fixed to the housing 110.

[0073] Please also refer to Figure 5 and Figure 6 In this embodiment, each offset segment 113b includes two sidewalls that gradually diverge outwards along the mounting direction X1. In other words, the spacing between the two sidewalls gradually increases along the mounting direction X1. When the terminal 130 is inserted into the housing 110, the two fixing arms 131 respectively enter the offset segment 113b and move along the surface of the two sidewalls. The two sidewalls cause the two fixing arms 131 to elastically deform and move away from each other along the axial direction Y. When the two fixing arms 131 enter the positioning structure 113c through the two sidewalls, they will effectively elastically expand and reach a predetermined position where they can elastically recover.

[0074] Please refer to Figures 1 to 8In another embodiment, a protrusion 113e may be provided inside the mounting channel 111, wherein the protrusion 113e is adjacent to the two positioning surfaces 113d. The protrusion 113e may be a rib structure extending from the bottom or top wall of the mounting channel 111, and the position of the protrusion 113e is usually next to the position after the two fixing arms 131 have passed through the guide structure 113 and elastically recovered. When one or both of the two fixing arms 131 elastically recover and move towards each other along the axial direction Y, the distance between the two fixing arms 131 decreases, at which point the two fixing arms 131 will clamp the protrusion 113e and abut against the two positioning surfaces 113d respectively. This clamping action not only provides additional holding force, but also helps to limit the movement or rotation of the terminal 130 along the axial directions X and Y within the mounting channel 111, thereby increasing the stability of the terminal 130 assembled in the housing 110. To ensure that the fixing arm 131 can smoothly clamp the protrusion 113e and abut against the positioning surface 113d, the width D1 of the protrusion 113e is approximately equal to the distance between the two positioning surfaces 113d, and the width D1 of the protrusion 113e is less than the distance D2 formed by the two fixing arms 131 during elastic deformation through the guide structure 113 (e.g., the maximum distance D2 reached by the two fixing arms 131 during elastic deformation through the offset section 113b), so that after the two fixing arms 131 pass over the guide structure 113 and elastically recover, they can effectively further clamp the protrusion 113e and abut against the two positioning surfaces 113d respectively, so that the terminal 130 can be securely locked to the housing 110.

[0075] Please refer to Figures 1 to 9 . Figure 8 It is based on Figure 1 The cross-sectional view of the wire connector 100 is drawn with the cleavage line C in the figure. Figure 9 It is based on Figure 1 The cross-sectional view of the wire connector 100 is drawn with the secant line C in the figure. Figure 8 and Figure 9 These are different states during the installation of terminal 130. To further enhance the holding force and stability of terminal 130 within housing 110, terminal 130 may further include barbed spring 133. Barbed spring 133 is typically an integrally formed structure manufactured from the metal body of terminal 130 through stamping or cutting processes. Barbed spring 133 is a cantilever structure that protrudes outward and backward from terminal 130 and has good elasticity.

[0076] In some embodiments of this disclosure, the two fixing arms 131 and the barbed spring 133 are respectively located on different sides of the terminal 130. This allows the two fixing arms 131 and the barbed spring 133 to elastically recover and be fixed in the mounting channel 111, preventing the terminal 130 from rotating about the Y-axis within the mounting channel 111. For example, the fixing arm 131 may be located on the left or right side of the terminal 130, while the barbed spring 133 may be located on the top or bottom side of the terminal 130; this disclosure is not limited thereto. In a specific embodiment of this disclosure, the two fixing arms 131 and the barbed spring 133 are respectively located on opposite sides of the terminal 130, with the fixing arm 131 located on the top side of the terminal 130 and the barbed spring 133 located on the bottom side of the terminal 130, thereby enhancing the stability of the terminal 130 fixed in the housing 110.

[0077] In some embodiments disclosed herein, the mounting channel 111 includes a constriction portion 111a to engage with a barbed spring 133 on the terminal 130 to achieve a locking function. The constriction portion 111a is located on the path of the terminal 130 inserted into the mounting channel 111 and abuts against the barbed spring 133. Specifically, the constriction portion 111a includes a height H that gradually decreases along the mounting direction X1 to guide the barbed spring 133 to elastically compress along the axial direction Z within the mounting channel 111. In practical applications, when the terminal 130 is inserted into the mounting channel 111, its barbed spring 133 contacts the constriction portion 111a. Due to the space limitation of the constriction portion 111a, the barbed spring 133 is subjected to pressure and undergoes elastic deformation along the axial direction Z. When the barbed spring 133 passes over the constriction portion 111a, it quickly recovers using its own elasticity to further secure itself to the mounting channel 111. Specifically, the converging portion 111a may include one or more inclined or curved surfaces that are inclined to the mounting direction X1, thereby achieving the effect of gradually elastically compressing the barbed spring 133 along the mounting direction X1.

[0078] In addition, the mounting channel 111 includes a groove 115 on its inner wall. The groove 115 accommodates the barbed spring 133 after it has passed through the constriction portion 111a and elastically recovered. The groove 115 is recessed along the axial direction Z into the inner wall of the mounting channel 111 and serves to limit the barbed spring 133 in the axial direction X, preventing the terminal 130 from moving backward or rotating around the axial direction X. Thus, the design of the barbed spring 133 and the groove 115 provides additional locking force, enhancing the reliability of the connection between the housing 110 and the terminal 130.

[0079] Please refer to Figures 1 to 9 (in particular Figure 7The mounting channel 111 further includes a first channel portion 111b and a second channel portion 111c communicating with the receiving portion 111a, wherein the first channel portion 111b communicates between the receiving portion 111a and the second channel portion 111c. Furthermore, the first channel portion 111b and the second channel portion 111c are configured to allow passage and reception of the contact portion 132 of the terminal 130, wherein the width W1 of the first channel portion 111b is approximately the same as the width of the contact portion 132, while the width W2 of the second channel portion 111c is greater than the width W1 of the first channel portion 111b. Since the width W1 of the first channel portion 111b is slightly greater than or approximately equal to the width of the contact portion 132, when the contact portion 132 is inserted into the first channel portion 111b, the first channel portion 111b provides initial guidance and alignment for the contact portion 132, ensuring that the contact portion 132 is further correctly inserted into the second channel portion 111c along the mounting direction X1. As terminal 130 continues to advance until contact portion 132 enters the wider second channel portion 111c, the second channel portion 111c provides additional insertion space for contact portion 132, allowing contact portion 132 to freely and reliably mate with another component. In summary, contact portion 132 is configured to first pass through the first channel portion 111b and then enter and be accommodated in the second channel portion 111c. This narrow-to-wide channel design, combined with the function of the constriction portion 111a, not only facilitates precise alignment when terminal 130 is inserted but also provides sufficient space and flexibility for the mating of contact portion 132, ensuring reliable connection.

[0080] In summary, the wire connector 100 disclosed herein, through the ingenious design of the elastic retaining arm 131 and the barbed spring 133 of the terminal 130, achieves quick, easy, and secure fixation of the terminal 130 to the housing 110 via structural interaction with the housing 110. This avoids the additional parts and cumbersome steps that may be required by traditional connectors, and in some embodiments, further enhances the reliability of the connection, ensuring that it is not easily loosened. Thus, the retaining arm 131 and the barbed spring 133 together form two fixing mechanisms, further improving the fixing strength and reliability of the terminal 130 within the mounting channel 111, preventing the terminal 130 from accidentally loosening from the housing 110.

Claims

1. A wire-end connector, characterized in that, include: The housing includes a mounting channel and a guide structure located within the mounting channel; as well as The terminal is configured to be inserted into the mounting channel and includes two fixing arms located on the same side, wherein the guide structure is configured to guide at least one of the two fixing arms to elastically deform, and the at least one of the two fixing arms is configured to be fixed to the mounting channel after elastic recovery through the guide structure.

2. The wire connector as described in claim 1, characterized in that, The guiding structure includes a guide groove configured to allow at least one of the two fixed arms to pass through.

3. The wire connector as described in claim 1, characterized in that, The guide structure has an offset section, the mounting channel extends axially, and the offset section is inclined to the axial direction.

4. The wire connector as described in claim 1, characterized in that, The two fixed arms extend parallel to each other.

5. The wire-end connector as described in claim 1, characterized in that, The installation channel includes a stop configured to abut against at least one of the two fixed arms after elastic recovery.

6. The wire connector as described in claim 1, characterized in that, The mounting channel includes a protrusion configured to be clamped after the elastic recovery of at least one of the two fixing arms.

7. The wire connector as described in claim 6, characterized in that, The width of the protrusion is less than the maximum distance between the two fixed arms when they elastically deform due to the guide structure.

8. The wire connector as described in claim 1, characterized in that, The terminal further includes a barbed spring, and the mounting channel includes a converging portion, wherein the barbed spring is configured to elastically deform when passing through the converging portion.

9. The wire connector as described in claim 8, characterized in that, The barbed spring and the two fixing arms are located on different sides of the terminal.

10. The wire-end connector as claimed in claim 8, characterized in that, The housing includes a groove disposed in the mounting channel and configured to receive the barbed spring passing through the constriction portion.

11. The wire connector as claimed in claim 1, characterized in that, The terminal includes a contact portion, the mounting channel includes a first channel portion and a second channel portion that are interconnected, the width of the second channel portion is greater than the width of the first channel portion, and the contact portion is configured to pass through the first channel portion first and then be received in the second channel portion.

12. A wire-end connector housing, characterized in that, include: ontology; At least one joint extends from the side of the body; as well as At least one mounting channel extends through the body and the at least one mating portion, with one end forming an mounting opening in the body and the other end forming a mating opening in the at least one mating portion; The at least one installation channel is provided with a guide structure and a positioning structure. The guide structure has a guide groove and an offset section. The guide groove extends along the installation direction. The offset section has an acute angle with the installation direction. The positioning structure is connected to the offset section.

13. The wire-end connector housing as described in claim 12, characterized in that, The positioning structure includes a positioning surface, the distance between the side of the positioning surface away from the offset segment and the mounting opening is equal to or less than the distance between the other side of the positioning surface near the offset segment and the mounting opening.

14. The wire-end connector housing as described in claim 13, characterized in that, The body has a window on this side to expose the positioning surface.

15. The wire-end connector housing as described in claim 12, characterized in that, The offset section is an inclined groove that connects to the guide groove.

16. The wire-end connector housing as claimed in claim 12, characterized in that, It also includes a snap-fit ​​structure that connects the body and extends along the installation direction, wherein the width of the snap-fit ​​structure at the end away from the mating part is greater than the width at the other end near the mating part.

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