Wire end elbow connector

Abstract

The utility model discloses a wire end elbow connector, include: casing, terminal sleeve, lid, clamping unit, connect and clamping post, clamping post connecting groove and spacing unit, the through accommodation cavity that casing is along the direction of plug -in is provided with, the installation mouth that communicates the accommodation cavity is formed to the back side of casing, the terminal sleeve is inserted and is installed in the accommodation cavity, and the terminal sleeve is connected with cable conductor welding, the lid is covered in the casing to close the installation mouth, the clamping unit includes respectively setting in the first clamping part and the second clamping part of the shell side wall of casing and the cover side of lid is matched, and the lid is separated from the casing through the clamping unit along the axial direction, the spacing unit includes the first spacing part and the second spacing part, and the lid is moved relative to the third shell side wall through the spacing unit, the clamping post is fixed in the casing and is close to the position of cable outlet, the corresponding clamping post connecting groove is set up on the lid, and the clamping of clamping post and clamping post connecting groove is used to restrict the lid to be raised relative to the casing.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a wire end elbow connector. Background Technology

[0002] In the field of electrical connector technology, bend-end connectors are widely used due to their ability to adapt to complex spatial layouts and optimize cable routing. Currently, bend-end connectors typically employ a split-shell structure, where an upper cover and lower shell are assembled to encapsulate and protect the internal conductive terminals and cables. The snap-fit ​​connection method between the upper and lower shells directly determines the connector's assembly efficiency, production cost, and long-term mechanical reliability.

[0003] Currently, a common practice is to use a hinge shaft at one end of the top cover and the bottom shell, and a snap-fit ​​structure at the other end for quick engagement. However, this common engagement method has gradually revealed significant problems in practical applications and mass production. First, the assembly process is cumbersome, and on mass production lines, improper assembly can easily lead to loose connections or damage to the snap-fit ​​due to improper assembly techniques. Furthermore, this unidirectional snap-fit ​​connection is highly susceptible to detachment from the engagement point under external force, causing connector failure and posing a safety hazard. Second, an unreasonable snap-fit ​​layout results in a wider span between the engagement points, leading to a lack of effective constraint and support in the middle of the top cover. When the top cover is inserted or removed, or subjected to lateral forces, it is prone to warping and deformation around two widely spaced engagement points. Long-term use can cause snap-fit ​​fatigue or even breakage, ultimately resulting in a flip-top appearance, severely impacting the product's lifespan and reliability. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a wire end elbow connector that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: As one aspect of this utility model, a wire end elbow connector is provided, comprising: The housing has a through cavity along the insertion direction, and an installation port communicating with the cavity is formed on the back side of the housing; a first housing sidewall, a second housing sidewall, a third housing sidewall and a fourth housing sidewall are formed in sequence around the cavity on the housing, and the first housing sidewall is provided with a cable outlet for leading out the cable conductor. A terminal sleeve is inserted into the receiving cavity, and the terminal sleeve is welded to the cable conductor; A cover is fitted onto the housing to seal the mounting opening; The snap-fit ​​unit includes a first snap-fit ​​part and a second snap-fit ​​part respectively disposed on the shell sidewall of the housing and the cover side of the cover, the second shell sidewall and the fourth shell sidewall are respectively provided with the first snap-fit ​​part, and the cover side of the cover is correspondingly provided with the second snap-fit ​​part; the snap-fit ​​unit restricts the cover from detaching from the housing in the axial direction; The limiting unit includes a first limiting part and a second limiting part. The first limiting part is provided on the third shell sidewall of the housing, and the second limiting part is correspondingly provided on the cover side of the cover. The limiting unit restricts the movement of the cover relative to the third shell sidewall. A connecting pin is fixed inside the housing near the cable outlet. A corresponding connecting pin groove is provided on the cover. The connecting pin engages with the connecting pin groove to prevent the cover from tilting relative to the housing.

[0006] Preferably, the first snap-fit ​​portion disposed on the side wall of the second shell and the first snap-fit ​​portion disposed on the side wall of the fourth shell are aligned with each other; or, The first snap-fit ​​portion disposed on the side wall of the second shell is offset from the first snap-fit ​​portion disposed on the side wall of the fourth shell; or... The portion of the first latching part disposed on the second shell sidewall and the portion of the first latching part disposed on the fourth shell sidewall are aligned with each other, and the portion of the first latching part disposed on the second shell sidewall and the portion of the first latching part disposed on the fourth shell sidewall are misaligned with each other.

[0007] Preferably, the first snap-fit ​​part is a snap-fit ​​arm connecting groove, which is disposed on the second shell side wall and the fourth shell side wall of the housing; the second snap-fit ​​part is a connecting snap-fit ​​arm, which is disposed on the second cover side and the fourth cover side and snap-fits with the snap-fit ​​arm connecting groove.

[0008] Preferably, the connecting end of the connecting arm faces the outer wall surface of the housing; and / or, The connecting end of the connecting arm faces the inner wall of the housing.

[0009] Preferably, the first limiting part is a limiting protrusion, which is disposed at the upper end of the third shell sidewall; the second limiting part is a limiting groove, which is disposed at the lower end of the third cover sidewall and engages with the limiting protrusion to restrict the movement of the cover relative to the third shell sidewall; or, The first limiting part is a limiting groove, which is disposed at the upper end of the third shell sidewall; the second limiting part is a limiting protrusion, which is disposed at the lower end of the third cover sidewall and engages with the limiting groove to restrict the cover from moving relative to the third shell sidewall.

[0010] Preferably, the connecting pin is integrally formed with the housing.

[0011] Preferably, there are two accommodating cavities, which are arranged diagonally across the cross-section of the housing.

[0012] Preferably, a terminal spring is installed inside the terminal sleeve.

[0013] Preferably, the terminal spring has a ring-shaped structure and a C-shaped cross-section.

[0014] Preferably, a bearing boss is provided on the side of the accommodating cavity away from the mounting port, and the two ends of the terminal sleeve abut against the bearing boss and the cover respectively.

[0015] The beneficial effects of this utility model are as follows: In this invention, the snap-fit ​​units distributed at corresponding positions on the second and fourth sides provide lateral locking force. The connecting pins and pin connecting grooves form a central anchor point near the first side, providing axial locking force to resist pull-out. The limiting unit forms an end stop on the third side to prevent movement on that side. In this invention, the snap-fit ​​units, connecting pins, pin connecting grooves, and limiting units work together to achieve comprehensive and reliable constraint around the joint surface between the shell and the cover. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] Figure 1 A schematic diagram of the structure of the wire end elbow connector provided in this embodiment of the utility model; Figure 2 for Figure 1 A schematic diagram of the exploded structure; Figure 3 for Figure 1 Schematic diagram of the middle cover structure; Figure 4 for Figure 1 Schematic diagram of the middle shell structure; Figure 5 for Figure 1 A schematic diagram of the structure viewed from below; Figure 6 for Figure 5 A schematic diagram of the three-dimensional sectional structure of AA; Figure 7This is a schematic diagram of the terminal spring.

[0018] In the picture: 100. Housing; 101. First housing sidewall; 102. Second housing sidewall; 103. Third housing sidewall; 104. Fourth housing sidewall; 105. Cable outlet; 106. Receiving cavity; 161. Supporting boss; 200. Terminal sleeve; 300. Cover body; 301. First cover side; 302. Second cover side; 303. Third cover side; 304. Fourth cover side; 400, Snap-fit ​​unit; 401, Connecting snap-fit ​​arm; 402, Snap-fit ​​arm connecting slot; 501. Connecting pin; 502. Pin connecting slot; 600, Limiting unit; 601, Limiting protrusion; 602, Limiting groove; 700, Terminal spring. Detailed Implementation

[0019] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model are further described in detail below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Figure 1 A schematic diagram of the structure of the wire end elbow connector provided in this embodiment of the utility model; Figure 2 for Figure 1 A schematic diagram of the exploded structure; Figure 3 for Figure 1 Schematic diagram of the middle cover structure; Figure 4 for Figure 1 Schematic diagram of the middle shell structure; Figure 5 for Figure 1 A schematic diagram of the structure viewed from below; Figure 6 for Figure 1 A three-dimensional sectional view of the AA connector is shown. The X-axis is defined as the length of the connector, coinciding with the direction of the cable lead-out. The Y-axis is defined as the width of the connector, perpendicular to the X-axis. The cross-section of the housing 100 described in the text represents the plane containing both the X and Y axes. The Z-axis is defined as the height of the connector, and the axial direction of the housing described in the text represents the Z-axis. The Z-axis is perpendicular to the plane containing both the X and Y axes.

[0023] like Figures 1 to 6As shown, this embodiment provides a wire end elbow connector, including: a housing 100, a terminal sleeve 200, a cover 300, a snap-fit ​​unit 400, a limiting unit 600, a connecting snap post 501, and a snap post connecting groove 502. The housing 100 has a through cavity 106 along the insertion direction, and an installation port communicating with the cavity 106 is formed on the back side of the housing 100; a first housing sidewall 101, a second housing sidewall 102, a third housing sidewall 103, and a fourth housing sidewall 104 are formed sequentially adjacent to the cavity 106 on the housing 100, and the first housing sidewall 101 is provided with a cable outlet 105 for leading out a cable conductor; a terminal sleeve 200 is inserted into the cavity 106, and the terminal sleeve 200 is welded to the cable conductor; a cover 300 is fitted onto the housing 100 to close the installation port; the snap-fit ​​unit 400 includes a first snap-fit ​​part and a second snap-fit ​​part respectively disposed on the shell sidewall of the housing 100 and the cover side of the cover 300 to match, and the second housing... The sidewall and the fourth shell sidewall are respectively provided with the first snap-fit ​​portion, and the cover side of the cover 300 is correspondingly provided with the second snap-fit ​​portion; the snap-fit ​​unit restricts the cover from detaching from the shell in the axial direction; the limiting unit 600 includes a first limiting portion and a second limiting portion, the third shell sidewall 103 of the shell 100 is provided with the first limiting portion, and the cover side of the cover 300 is correspondingly provided with the second limiting portion; the limiting unit restricts the cover from moving relative to the third shell sidewall; the connecting pin 501 is fixed inside the shell 100 near the cable outlet 105, and the cover 300 is correspondingly provided with a pin connecting groove, and the snap-fit ​​of the connecting pin 501 with the pin connecting groove restricts the cover from tilting relative to the shell.

[0024] Here, the back side of housing 100 refers to the side away from the insertion interface of the wire end elbow connector, i.e. Figure 4 The upper end of the housing 100 shown.

[0025] It should also be noted that, such as Figure 3 As shown, a first cover side portion 301, a second cover side portion 302, a third cover side portion 303, and a fourth cover side portion 304 are sequentially arranged along the circumference of the cover body 300, and are sequentially connected to the first shell side wall 101, the second shell side wall 102, the third shell side wall 103, and the fourth shell side wall 104 of the shell 100. That is, the first cover side portion 301 of the cover body 300 is connected to the first shell side wall 101 of the shell 100, the second cover side portion 302 of the cover body 300 is connected to the second shell side wall 102 of the shell 100, the third cover side portion 303 of the cover body 300 is connected to the third shell side wall 103 of the shell 100, and the fourth cover side portion 304 of the cover body 300 is connected to the fourth shell side wall 104 of the shell 100.

[0026] In this embodiment, the snap-fit ​​units distributed at corresponding positions on the second and fourth sides provide lateral locking force. The connecting pins and pin connecting grooves form a central anchor point near the first side, providing axial locking force against pull-out. The limiting unit forms an end stop on the third side to prevent movement on that side. In this utility model, the snap-fit ​​units, connecting pins, pin connecting grooves, and limiting units work together to form a stable closed constraint loop in the planes containing the X and Y axes. This significantly enhances the overall rigidity and stability of the shell and cover after they are combined, effectively eliminating the problem of cover warping and deformation caused by the large span of the snap-fit ​​unit 400's engagement point and insufficient central support, thereby improving the mechanical reliability and service life of the wire end elbow connector.

[0027] In one embodiment, the first snap-fit ​​portion disposed on the second shell sidewall 102 and the first snap-fit ​​portion disposed on the fourth shell sidewall 104 are aligned with each other. Correspondingly, the second snap-fit ​​portion disposed on the second cover side 302 and the second snap-fit ​​portion disposed on the fourth cover side 304 are also aligned with each other. When the cover 300 is mounted on the shell 100, each first snap-fit ​​portion on the shell and each second snap-fit ​​portion on the cover are snap-fitted together in a one-to-one manner.

[0028] like Figure 2 As shown, in one specific embodiment, two first snap-fit ​​portions provided on the second shell sidewall 102 and two first snap-fit ​​portions provided on the fourth shell sidewall 104 are aligned with each other. Correspondingly, two second snap-fit ​​portions provided on the second cover side 302 and two second snap-fit ​​portions provided on the fourth cover side 304 are aligned with each other. At the same time, when the cover 300 is installed on the shell 100, the four first snap-fit ​​portions on the shell 100 and the four second snap-fit ​​portions on the cover 300 are snap-fitted together one by one.

[0029] It should be noted that the number of snap-fit ​​units 400 provided on the second cover side 302 and the second shell side wall 102 is not limited to two; it can be three, four, etc. These will not be listed here, and the specific number can be set according to actual needs. Similarly, the number of snap-fit ​​units 400 provided on the fourth cover side 304 and the fourth shell side wall 104 is not limited to two; it can be three, four, etc. These will not be listed here, and the specific number can be set according to actual needs. However, it should be noted that in this embodiment, the number of snap-fit ​​units 400 provided on the second cover side 302 and the second shell side wall 102 should generally be the same as the number of snap-fit ​​units 400 provided on the fourth cover side 304 and the fourth shell side wall 104, thereby achieving mutual alignment.

[0030] In one embodiment, the first snap-fit ​​portion disposed on the second shell sidewall 102 and the first snap-fit ​​portion disposed on the fourth shell sidewall 104 are offset from each other. Correspondingly, the second snap-fit ​​portion disposed on the second cover side 302 and the second snap-fit ​​portion disposed on the fourth cover side 304 are also offset from each other. At the same time, when the cover 300 is mounted on the shell 100, each first snap-fit ​​portion on the shell 100 and each second snap-fit ​​portion on the cover 300 are snap-fitted and connected one-to-one.

[0031] It should be noted that the number of snap-fit ​​units 400 provided on the second cover side 302 and the second shell side wall 102 is not limited to two; it can be three, four, etc. These will not be listed here; the specific number can be set according to actual needs. Similarly, the number of snap-fit ​​units 400 provided on the fourth cover side 304 and the fourth shell side wall 104 is not limited to two; it can be three, four, etc. These will not be listed here; the specific number can be set according to actual needs. However, it should be noted that the number of snap-fit ​​units 400 provided on the second cover side 302 and the second shell side wall 102 may differ from the number of snap-fit ​​units 400 provided on the fourth cover side 304 and the fourth shell side wall 104.

[0032] In one embodiment, a portion of the first latching portion disposed on the second shell sidewall 102 and a portion of the first latching portion disposed on the fourth shell sidewall 104 are aligned with each other, and a portion of the first latching portion disposed on the second shell sidewall 102 and a portion of the first latching portion disposed on the fourth shell sidewall 104 are staggered with each other. Correspondingly, a portion of the second latching portion disposed on the second cover side 302 and a portion of the second latching portion disposed on the fourth cover side 304 are aligned with each other, and a portion of the second latching portion disposed on the second cover side 302 and a portion of the second latching portion disposed on the fourth cover side 304 are staggered with each other. When the cover 300 is mounted on the shell 100, each first latching portion on the shell 100 and each second latching portion on the cover 300 are latched and connected in a one-to-one manner.

[0033] In one embodiment, the first snap-fit ​​part is a snap-fit ​​arm connecting groove 402, which is disposed on the second shell sidewall 102 and the fourth shell sidewall 104 of the housing 100; the second snap-fit ​​part is a connecting snap-fit ​​arm 401, which is disposed on the second cover side 302 and the fourth cover side 304 and snap-fitted to the snap-fit ​​arm connecting groove 402.

[0034] Alternatively, the connecting end of the connecting arm 401 faces the outer wall surface of the housing 100.

[0035] Alternatively, the connecting end of the connecting arm 401 faces the inner wall surface of the housing 100.

[0036] refer to Figure 2 As shown, two connecting arms 401 are provided on the second cover side 302, with the connecting ends of the two connecting arms 401 facing the outer wall surface and the inner wall surface of the housing 100, respectively. Two connecting arms are provided on the fourth cover side 304, with the connecting ends of the two connecting arms 401 both facing the outer wall surface of the housing 100.

[0037] The structure of the limiting unit 600 is described below. For example... Figure 4 and Figure 6 As shown, the first limiting part is a limiting groove 602, which is disposed at the upper end of the third shell sidewall 103; the second limiting part is a limiting protrusion 601, which is disposed at the lower end of the third cover sidewall 303 and engages with the limiting groove 602 to restrict the cover from moving relative to the third shell sidewall.

[0038] As an optional embodiment (not shown in the figure), the first limiting part is a limiting protrusion 601, which is disposed at the upper end of the third shell sidewall 103; the second limiting part is a limiting groove 602, which is disposed at the lower end of the third cover sidewall 303 and engages with the limiting protrusion 601 to restrict the movement of the cover relative to the third shell sidewall.

[0039] In one embodiment, the connecting pin 501 is integrally formed with the housing 100, fundamentally eliminating the risk of the connecting pin becoming loose. This provides higher mechanical strength, enabling it to withstand greater insertion and extraction forces and impacts, ensuring the long-term effectiveness of the locking function. Furthermore, this eliminates the need for separate installation of the connecting pin 501, simplifying the assembly process, improving production efficiency, avoiding assembly errors, and ensuring consistency.

[0040] In one embodiment, two accommodating cavities 106 are provided, and the two accommodating cavities 106 are arranged diagonally across the cross-section of the housing 100. This diagonal arrangement of the two accommodating cavities 106 near the first housing sidewall 101 where the cable outlet 105 is located creates a valuable reserved space to facilitate the arrangement of the connecting pin 501, achieving a high degree of integration of the internal structure. Simultaneously, the two diagonally arranged accommodating cavities 106, together with the connecting pin 501, form a stable triangular support, dispersing external stress, enhancing the housing's resistance to torsion and deformation, and improving mechanical reliability.

[0041] In one embodiment, a terminal spring 700 is installed inside the terminal sleeve 200. Further, as... Figure 7 As shown, the terminal spring 700 has a ring-shaped structure and a C-shaped cross-section.

[0042] In this embodiment, the wire end elbow connector requires the terminal sleeve 200 to be ultrasonically welded to the cable conductor during assembly. Then, the terminal spring 700 is nested within the terminal sleeve 200 to which the cable conductor is welded, and the assembly is installed into the housing cavity. Finally, the cover is installed. It should be noted that although the cable conductor is not shown in the figure, the terminal spring 700 must be installed within the terminal sleeve 200 to which the cable conductor has already been welded.

[0043] In one embodiment, a support boss 161 is provided at the bottom of the accommodating cavity 106, and both ends of the terminal sleeve 200 abut against the support boss 161 and the cover 300, respectively. In this embodiment, the support boss 161 acts as a reliable mechanical stop, ensuring that all terminal sleeves 200 are installed at a consistent depth within the housing, preventing over-insertion, and guaranteeing assembly consistency and internal structural safety. Simultaneously, the support boss 161 also provides a large area of ​​structural support for the terminal sleeves 200, enabling them to withstand greater axial insertion and extraction forces and impact vibrations, effectively protecting the solder joints at the terminal tail and extending the mechanical life of the wire-end elbow connector.

[0044] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0047] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A wire end elbow connector, characterized in that, include: The housing (100) has a through cavity (106) along the insertion direction, and an installation port communicating with the cavity (106) is formed on the back side of the housing (100); a first housing sidewall (101), a second housing sidewall (102), a third housing sidewall (103) and a fourth housing sidewall (104) are formed in sequence around the cavity (106) on the housing (100), and the first housing sidewall (101) is provided with a cable outlet (105) for leading out the cable conductor. A terminal sleeve (200) is inserted into the receiving cavity (106), and the terminal sleeve (200) is welded to the cable conductor; A cover (300) is fitted onto the housing (100) to close the mounting opening; The snap-fit ​​unit (400) includes a first snap-fit ​​part and a second snap-fit ​​part respectively disposed on the shell sidewall of the housing (100) and the cover side of the cover (300). The second shell sidewall (102) and the fourth shell sidewall (104) are respectively provided with the first snap-fit ​​part, and the cover side of the cover (300) is correspondingly provided with the second snap-fit ​​part; the snap-fit ​​unit (400) restricts the cover (300) from detaching from the housing (100) in the axial direction. The limiting unit (600) includes a first limiting part and a second limiting part. The first limiting part is provided on the third shell sidewall (103) of the housing (100), and the second limiting part is correspondingly provided on the cover side of the cover (300). The limiting unit (600) restricts the movement of the cover (300) relative to the third shell sidewall (103). A connecting pin (501) is fixed inside the housing (100) near the cable outlet (105). A corresponding connecting pin groove (502) is provided on the cover (300). The connecting pin (501) and the connecting pin groove (502) are engaged to restrict the cover (300) from tilting relative to the housing (100).

2. The wire end elbow connector according to claim 1, characterized in that, The first snap-fit ​​portion disposed on the second shell sidewall (102) is aligned with the first snap-fit ​​portion disposed on the fourth shell sidewall (104); or, The first snap-fit ​​portion disposed on the second shell sidewall (102) and the first snap-fit ​​portion disposed on the fourth shell sidewall (104) are offset from each other; or, The portion of the first snap-fit ​​portion disposed on the second shell sidewall (102) and the portion of the first snap-fit ​​portion disposed on the fourth shell sidewall (104) are aligned with each other, and the portion of the first snap-fit ​​portion disposed on the second shell sidewall (102) and the portion of the first snap-fit ​​portion disposed on the fourth shell sidewall (104) are offset from each other.

3. The wire end elbow connector according to claim 1, characterized in that, The first snap-fit ​​part is a snap-fit ​​arm connecting groove (402), which is disposed on the second shell sidewall (102) and the fourth shell sidewall (104) of the housing (100); the second snap-fit ​​part is a connecting snap-fit ​​arm (401), which is disposed on the cover side and snap-fitted to the snap-fit ​​arm connecting groove (402).

4. The wire end elbow connector according to claim 3, characterized in that, The connecting end of the connecting arm (401) faces the outer wall surface of the housing (100); and / or, The connecting end of the connecting arm (401) faces the inner wall of the housing (100).

5. The wire end elbow connector according to claim 1, characterized in that, The first limiting part is a limiting protrusion (601), which is disposed at the upper end of the third shell sidewall (103); the second limiting part is a limiting groove (602), which is correspondingly disposed at the lower end of the cover side and engages with the limiting protrusion (601) to restrict the movement of the cover (300) relative to the third shell sidewall (103); or, The first limiting part is a limiting groove (602), which is disposed at the upper end of the third shell sidewall (103); the second limiting part is a limiting protrusion (601), which is disposed at the lower end of the cover side and engages with the limiting groove (602) to restrict the cover (300) from moving relative to the third shell sidewall (103).

6. The wire end elbow connector according to claim 1, characterized in that, The connecting pin (501) is integrally formed with the housing (100).

7. The wire end elbow connector according to claim 1, characterized in that, There are two accommodating cavities (106), which are arranged diagonally on the cross-section of the housing (100).

8. The wire end elbow connector according to claim 1, characterized in that, Terminal springs (700) are installed inside the terminal sleeve (200).

9. The wire end elbow connector according to claim 8, characterized in that, The terminal spring (700) has a ring-shaped structure and a C-shaped cross-section.

10. The wire end elbow connector according to any one of claims 1 to 9, characterized in that, A bearing boss (161) is provided on the side of the accommodating cavity (106) away from the mounting port, and the two ends of the terminal sleeve (200) abut against the bearing boss (161) and the cover (300) respectively.

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