A flexible wire elbow

Abstract

This application relates to the field of retractable cord technology, and more particularly to a retractable elbow cord. The retractable elbow cord includes a housing, a cord, a charging head, and a winding structure. The housing has a receiving cavity and a through hole communicating with the receiving cavity. The charging head includes a connector and a socket, with the connector perpendicular to the socket. The end of the connector away from the socket is connected to a first end of the cord. The winding structure is disposed in the receiving cavity, and the cord is connected to the winding structure. The winding structure is used to extend the cord out of the housing or retract it into the housing. When the cord is retracted into the housing, the connector portion is housed in the receiving cavity through the through hole. The socket portion is located outside the housing and abuts against the outer contour of the housing.

Description

Technical Field

[0001] This application relates to the field of telescopic cable technology, and more particularly to a bend telescopic cable. Background Technology

[0002] In today's society, with the widespread use of smart devices such as smartphones, laptops, and tablets, people often need to charge their mobile devices when they go out. As a result, retractable cables have emerged. When the retractable cable is in a retracted state, the socket part of the charging head needs to be located on the outside of the retractable cable for the user's next use.

[0003] The problem with the aforementioned retractable cable is that it requires an additional fixing structure between the charging head and the housing, such as a magnetic structure, which makes the retractable cable's structure more complex. Utility Model Content

[0004] To address the aforementioned issues, this application provides a retractable elbow cable that eliminates the need for an additional fixing structure between the charging head and the housing. This optimizes the structure of the retractable elbow cable, making it simpler.

[0005] This application provides a retractable elbow cable, which includes a housing, a cable, a charging head, and a winding structure. The housing has a receiving cavity and a through hole communicating with the receiving cavity. The charging head includes a connector and a socket. The connector and the socket are perpendicular. The end of the connector away from the socket is connected to the first end of the cable. The winding structure is disposed in the receiving cavity. The cable and the winding structure are connected. The winding structure is used to drive the cable out of the housing or retract it into the housing. When the cable is retracted into the housing, the connector portion is housed in the receiving cavity through the through hole. The socket portion is located outside the housing and abuts against the outer contour of the housing.

[0006] The retractable elbow cable provided in this application includes a connector and a socket. The end of the connector away from the socket is connected to the first end of the cable, while the socket can be plugged into a mobile device to charge it. The connector and socket are perpendicular, making the charging head resemble a bend. When the cable is retracted into the housing, the connector is housed in the receiving cavity through a through-hole. However, since the connector and socket are perpendicular and extend in different directions, the socket cannot be housed in the receiving cavity through the through-hole. Thus, the socket is located outside the housing for easy access next time. Furthermore, when the cable is wound back into the housing, the connector is housed in the receiving cavity through the through-hole, and the socket is located outside the housing and abuts against its outer contour. No additional fixing structure is needed between the housing and the charging head; simply by setting the connector and socket perpendicularly, the housing and charging head can be positioned correctly. This optimizes the structure of the retractable elbow cable, making it simpler. Compared to related technologies, which require additional fixing structures such as magnetic structures between the charging head and the housing, resulting in a complex structure for the retractable cable, this application achieves a solution by vertically aligning the connector and the socket, eliminating the need for additional fixing structures between the charging head and the housing. This optimizes the structure of the retractable cable and simplifies its design.

[0007] In one possible implementation provided in this application, the outer contour of the housing includes a recessed relief portion that is recessed inward along the direction of the receiving cavity. When the wire is recycled into the housing, a portion of the connector portion passes through the through hole and is received in the receiving cavity, while the socket portion is located outside the housing and abuts against the recessed relief portion.

[0008] In one possible implementation provided in this application, when the socket portion is located outside the housing and abuts against the clearance recess, the socket portion is not higher than the clearance recess.

[0009] In one possible implementation provided in this application, the socket portion extends along a first direction, and along the first direction, the size of the avoidance recess is larger than the size of the socket portion.

[0010] In one possible implementation provided in this application, the connector extends along a second direction, and along a third direction, the size of the recess is larger than the size of the connector; wherein, the first direction is perpendicular to the second direction, and the third direction is perpendicular to both the first and second directions.

[0011] In one possible implementation provided in this application, the connector is provided with an action part, which is used to be held so that the winding structure can drive the wire out of the housing.

[0012] In one possible implementation provided in this application, the functional part is a functional protrusion provided in the joint.

[0013] In one possible implementation provided in this application, there are two active parts, which are symmetrically distributed on both sides of the connector along a third direction.

[0014] In one possible implementation provided in this application, the inner contour of the recessed area is a smooth surface.

[0015] In one possible implementation provided in this application, the elbow telescopic cable also includes a locking structure, which is used to lock the cable in place when the cable extends out of the housing. Attached Figure Description

[0016] Figure 1 A structural schematic diagram of the first state of the first type of elbow expansion joint provided in the embodiments of this application;

[0017] Figure 2 A front view of the first state of a first type of elbow expansion joint provided in an embodiment of this application;

[0018] Figure 3 A structural schematic diagram of the second state of the first type of elbow expansion joint provided in the embodiments of this application;

[0019] Figure 4 A top view of the second state of the first type of elbow telescopic line provided in the embodiments of this application;

[0020] Figure 5 This is a front view of the elbow expansion joint provided in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of the connection structure between the wire, charging head, and winding structure in the elbow telescopic cable provided in this embodiment of the application.

[0022] Figure 7 A front view of a structural schematic diagram of the first state of the second type of elbow expansion joint provided in the embodiments of this application;

[0023] Figure 8 A top view of the second state of the second type of elbow telescopic line provided in the embodiments of this application;

[0024] Figure 9 This is a front view of the second state of the second type of elbow telescopic line provided in the embodiments of this application.

[0025] Figure label:

[0026] 1-Elbow telescopic cable; 11-Housing; 111-Avoidance recess; 12-Wire; 121-First end; 13-Charging head; 131-Socket part; 132-Connector part; 1321-Actuating part; 14-Rolling structure; A-First direction; B-Second direction; C-Third direction. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0029] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0030] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0031] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0032] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 With the widespread adoption of smart devices such as smartphones, laptops, and tablets, the number of devices that power these mobile devices (e.g., a retractable elbow cord 1) will also increase. Therefore, this application provides a retractable elbow cord 1, which includes a housing 11, a wire 12, a charging head 13, and a winding structure 14. The housing 11 has a receiving cavity with a through hole communicating with the cavity. The charging head 13 includes a connector portion 132 and a socket portion 131, with the connector portion 132 perpendicular to the socket portion 131. One end of the connector portion 132 away from the socket portion 131 is connected to the first end 121 of the wire 12. The winding structure 14 is disposed in the receiving cavity, and the wire 12 is connected to the winding structure 14. The winding structure 14 is used to extend the wire 12 out of the housing 11 or retract it into the housing 11. When the wire 12 is retracted into the housing 11, a portion of the connector portion 132 is housed in the receiving cavity through the through hole. The socket portion 131 is located outside the housing 11 and abuts against the outer contour of the housing 11.

[0035] In this embodiment, the housing 11 has a receiving cavity. The shape of the receiving cavity can be a regular shape, for example, a cube or a cylinder; of course, the shape of the receiving cavity can also be irregular; this embodiment does not limit this. Similarly, the outer contour of the housing 11 can be a regular shape, for example, a cube or a cylinder; of course, the outer contour of the housing 11 can also be irregular; this embodiment also does not limit this.

[0036] In this embodiment, the housing 11 has a receiving cavity. The housing 11 can be integrally formed to form the receiving cavity; or the housing 11 can be separately formed to form the receiving cavity. This embodiment does not limit the specific form of the receiving cavity. In one possible implementation provided by this embodiment, the housing 11 includes an upper cover and a lower cover, which are fastened together to form the receiving cavity.

[0037] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Or, refer to Figure 7 , Figure 8 and Figure 9 In this embodiment, the housing 11 is further provided with a through hole communicating with the receiving cavity. This through hole can be located at any position on the housing 11. For example, if the housing 11 is a cuboid, the through hole can be located at any position on any face of the cuboid. This embodiment does not impose any restrictions on this. The two types of elbow telescopic cables 1 provided in this embodiment differ in the position of the through hole. The through hole of the first type of elbow telescopic cable 1 is not located at the edge, while the through hole of the second type of elbow telescopic cable 1 is located at the edge.

[0038] In this embodiment, the charging head 13 includes a connector portion 132 and a socket portion 131. The connector portion 132 is perpendicular to the socket portion 131. The end of the connector portion 132 away from the socket portion 131 is connected to the first end 121 of the cable 12. Here, the socket portion 131 is used to connect to a mobile device. The interface type of the socket portion 131 can be a USB Type-C interface; the interface type of the socket portion 131 can also be a Lightning interface; the interface type of the socket portion 131 can also be a Micro USB interface; this embodiment does not limit the specific type of the interface. In one possible implementation provided in this embodiment, the interface type of the socket portion 131 is a USB Type-C interface.

[0039] In this embodiment, the winding structure 14 may include a winding portion, a first positioning portion, and a second positioning portion. The winding portion is used to wind the wire 12, the first positioning portion is used to fix the second end of the wire 12, and the second positioning portion is used to fix the position of the winding structure 14 within the housing 11 and enable the winding structure 14 to rotate. The rotation of the winding structure 14 causes the wire 12 to extend or retract, thereby driving the wire 12 out of the housing 11 or retracting it into the housing 11.

[0040] Here, the first positioning part is used to fix the second end of the wire 12. The second end of the wire 12 can be non-removably fixed to the first positioning part; for example, the second end of the wire 12 can be glued to the first positioning part, or welded to the first positioning part. Alternatively, the second end of the wire 12 can be detachably fixed to the first positioning part; for example, the second end of the wire 12 can be snapped onto the first positioning part, or screwed onto the first positioning part. This embodiment does not limit the scope of this application. The second positioning part is used to position the winding structure 14 within the housing 11 and enables the winding structure 14 to rotate.

[0041] Based on this, the second positioning part for positioning the winding structure 14 within the housing 11 can be achieved by a shaft hole fit; the second positioning part for positioning the winding structure 14 within the housing 11 can be achieved by a hinge connection; in this respect, the embodiments of this application do not impose any limitations.

[0042] In this embodiment, the socket portion 131 is located outside the housing 11 and abuts against the outer contour of the housing 11. Here, the socket portion 131 abuts against the outer contour of the housing 11 in a point contact manner; the socket portion 131 abuts against the outer contour of the housing 11 in a line contact manner; or the socket portion 131 abuts against the outer contour of the housing 11 in a surface contact manner. This embodiment does not limit the scope of this embodiment.

[0043] The retractable cable 1 with a bend provided in this embodiment includes a charging head 13 comprising a connector portion 132 and a socket portion 131. The end of the connector portion 132 away from the socket portion 131 is connected to the first end 121 of the cable 12, while the socket portion 131 can be plugged into a mobile device to charge the device. Furthermore, the connector portion 132 is perpendicular to the socket portion 131, making the charging head 13 resemble a bend. Thus, when the cable 12 is retracted into the housing 11, a portion of the connector portion 132 is housed in the receiving cavity through a through-hole. Since the connector portion 132 is perpendicular to the socket portion 131, the connector portion 132 and the socket portion 131 have different extending directions. The socket portion 131 cannot be housed in the receiving cavity through the through hole. Thus, the socket portion 131 is located outside the housing 11 for easy access by the user next time. In addition, when the wire 12 is retracted into the housing 11, part of the connector portion 132 is housed in the receiving cavity through the through hole. The socket portion 131 is located outside the housing 11 and abuts against the outer contour of the housing 11. No additional fixing structure is required between the housing 11 and the charging head 13. The housing 11 and the charging head 13 can be limited simply by setting the connector portion 132 and the socket portion 131 perpendicularly. In this way, the structure of the elbow telescopic cable 1 can be optimized, making the structure of the elbow telescopic cable 1 simpler. Compared to related technologies, which require additional fixing structures, such as magnetic structures, between the charging head 13 and the housing 11, resulting in a more complex structure for the retractable cable, this application achieves a simpler structure by vertically arranging the connector 132 and the socket 131. This eliminates the need for additional fixing structures between the charging head 13 and the housing 11.

[0044] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5This application provides a bent telescopic cable 1. The outer contour of the housing 11 includes a recessed relief portion 111 that is recessed in the direction of the receiving cavity. When the cable 12 is retracted into the housing 11, a portion of the connector portion 132 passes through the through hole and is received in the receiving cavity. The socket portion 131 is located outside the housing 11 and abuts against the recessed relief portion 111.

[0045] In this embodiment, the outer contour of the housing 11 includes a recessed relief portion 111 that is recessed inward along the direction of the receiving cavity. Here, the inner contour shape of the relief portion 111 can be a regular structure, for example, the inner contour shape of the relief portion 111 is a cuboid structure, or for example, the inner contour shape of the relief portion 111 is a cylinder structure; of course, the inner contour shape of the relief portion 111 can be an irregular shape, and this embodiment does not limit it.

[0046] In this embodiment, the outer contour of the housing 11 includes a recessed relief portion 111 that is recessed inward along the direction of the receiving cavity. Here, the inner contour of the relief portion 111 can be a smooth surface. In this way, when the wire 12 is retracted into the housing 11, the portion of the connector portion 132 passes through the through hole and is received in the receiving cavity, and the socket portion 131 is located outside the housing 11 and abuts against the relief portion 111, which can reduce the possibility of the inner contour of the relief portion 111 scratching the socket portion 131. Of course, the inner contour of the relief portion 111 can also be a non-smooth surface. In this way, when the wire 12 is retracted into the housing 11, the portion of the connector portion 132 passes through the through hole and is received in the receiving cavity, and the socket portion 131 is located outside the housing 11 and abuts against the relief portion 111, which can increase the friction between the inner contour of the relief portion 111 and the socket portion 131. This embodiment does not limit the scope of this embodiment.

[0047] In this embodiment, when the wire 12 is retracted into the housing 11, part of the connector 132 passes through the through hole and is housed in the receiving cavity, and the socket 131 is located outside the housing 11 and abuts against the relief recess 111. Here, the socket 131 may be higher than the relief recess 111; of course, the socket 131 may not be higher than the relief recess 111; this embodiment does not limit this.

[0048] The elbow telescopic cable 1 provided in this application embodiment has a recessed relief portion 111 on the outer contour of the housing 11 along the direction of the receiving cavity. When the cable 12 is retracted into the housing 11, part of the connector portion 132 passes through the through hole and is housed in the receiving cavity, and the socket portion 131 is located outside the housing 11 and abuts against the relief relief portion 111. In this way, the size of the outer contour of the housing 11 along the direction of the receiving cavity can be shortened, which is beneficial to the miniaturized structural design of the elbow telescopic cable 1.

[0049] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a bent telescopic cable 1 in which the socket portion 131 is located outside the housing 11 and abuts against the avoidance recess 111, and the socket portion 131 is not higher than the avoidance recess 111.

[0050] In this embodiment of the application, when the socket portion 131 is located outside the housing 11 and abuts against the relief recess 111, the socket portion 131 is not higher than the relief recess 111. It can be that the socket portion 131 is flush with the relief recess 111, or the socket portion 131 is lower than the relief recess 111. This embodiment of the application does not limit this.

[0051] The elbow telescopic cable 1 provided in this application embodiment, since the socket portion 131 is located outside the housing 11 and abuts against the avoidance recess 111, the socket portion 131 is not higher than the avoidance recess 111. In this way, the socket portion 131 can be prevented from being exposed, so as to protect the socket portion 131.

[0052] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a bent telescopic cable 1, with a socket portion 131 extending along a first direction A, and along the first direction A, the size of the avoidance recess 111 is larger than the size of the socket portion 131.

[0053] The elbow telescopic cable 1 provided in this application embodiment has a socket portion 131 extending along a first direction A. Along the first direction A, the size of the avoidance recess 111 is larger than the size of the socket portion 131, so that when the user uses the socket portion 131 again, the avoidance recess 111 can provide the user with operating space along the first direction A.

[0054] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a flexible extension cord 1 with a joint portion 132 extending along a second direction B and along a third direction C, with the size of the avoidance recess 111 being larger than the size of the joint portion 132; wherein, the first direction A is perpendicular to the second direction B, and the third direction C is perpendicular to the first direction A and the second direction B respectively.

[0055] The elbow telescopic cable 1 provided in this application embodiment has a connector 132 extending along the second direction B and along the third direction C. The size of the avoidance recess 111 is larger than the size of the connector 132, so that when the user uses the socket 131 next time, the avoidance recess 111 can provide the user with operating space along the third direction C.

[0056] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a bent telescopic cable 1, with an action part 1321 provided on the connector 132. The action part 1321 is used to be held so that the winding structure 14 drives the wire 12 to extend out of the housing 11.

[0057] In this embodiment of the application, the connector 132 is provided with a function part 1321, which is used to be gripped. Here, the function part 1321 can be a function protrusion provided in the connector 132; the function part 1321 can be a function handle provided in the connector 132; the function part 1321 can be a function coil provided in the connector 132. This embodiment of the application does not limit the scope of the application.

[0058] The elbow telescopic cable 1 provided in this application embodiment has an action part 1321 on the connector, which is used to be held, so as to save the time of the winding structure 14 driving the wire 12 to extend out of the housing 11.

[0059] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a flexible extension cord 1 with a bend, wherein the functional part 1321 is a functional protrusion provided in the connector part 132.

[0060] In this application embodiment, there may be one or more functional protrusions; this application embodiment does not impose any limitation on this. In one possible implementation provided in this application embodiment, there are multiple functional protrusions.

[0061] The elbow telescopic cable 1 provided in this application embodiment has the technical effect of simple structure and easy implementation by setting the working part 1321 as a working protrusion in the joint part 132.

[0062] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a flexible extension cord 1 with two working parts 1321, which are symmetrically distributed on both sides of the connector 132 along the third direction C.

[0063] The elbow telescopic cable 1 provided in this application embodiment has two working parts 1321, which are symmetrically distributed on both sides of the connector 132 along the third direction C, thus improving the stability of the grip.

[0064] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a curved telescopic line 1, in which the inner contour of the avoidance recess 111 is a smooth surface.

[0065] In this embodiment, the inner contour of the avoidance recess 111 is a smooth surface; here, the inner contour of the avoidance recess 111 can be a smooth arc surface, for example, a smooth convex surface, or for example, a smooth concave surface; of course, the inner contour of the avoidance recess 111 can also be a smooth plane; in this respect, this embodiment does not limit it.

[0066] The elbow extension cord 1 provided in this application embodiment reduces the possibility of the avoidance recess 111 scratching the socket part 131 when the socket part 131 abuts against the avoidance recess 111 by setting the inner contour of the avoidance recess 111 to a smooth surface.

[0067] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a bend telescopic cable 1, which also includes a locking structure. When the cable 12 extends out of the housing 11 to the target length, the locking structure is used to lock the cable 12.

[0068] In this embodiment, the locking structure is used to lock the wire 12 when the wire 12 extends from the housing 11 to the target length. In other words, when the wire 12 extends from the housing 11 to the target length, for example, when the wire 12 extends 10 cm from the housing 11, the locking structure can lock the wire 12 to this state. In addition, the locking structure can be a locking protrusion and a locking groove that are adapted to each other. For example, the locking structure can be a locking groove provided on the winding structure 14 and a locking protrusion provided on the wire 12. When the wire 12 extends from the housing 11 to the target length, the locking protrusion and the locking groove are adapted to each other. The locking structure can also include a locking protrusion provided in the receiving cavity and a locking track provided on the winding structure 14. The locking protrusion is located in the locking track and moves in the locking track. The locking track has a locking part. When the wire 12 extends from the housing 11 to the target length, the locking protrusion and the locking part are adapted to lock the wire 12.

[0069] The elbow telescopic cable 1 provided in this application embodiment has a locking structure. When the cable 12 extends out of the housing 11 to the target length, the locking structure is used to lock the cable 12, so as to facilitate user use.

[0070] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A type of elbow telescopic cable, characterized in that, include: The shell has a receiving cavity and a through hole communicating with the receiving cavity; Wire; A charging head includes a connector portion and a socket portion, the connector portion and the socket portion being perpendicular to each other, and the end of the connector portion away from the socket portion being connected to a first end of the cable; A winding structure is provided in the receiving cavity, the wire is connected to the winding structure, and the winding structure is used to drive the wire to extend out of the housing or retract into the housing; When the wire is retracted into the housing, a portion of the connector passes through the through hole and is housed in the receiving cavity, while the socket portion is located outside the housing and abuts against the outer contour of the housing.

2. The elbow telescopic line according to claim 1, characterized in that, The outer contour of the housing includes a recessed relief portion that is recessed inward along the direction of the receiving cavity. When the wire is retracted into the housing, a portion of the connector portion passes through the through hole and is received in the receiving cavity, and the socket portion is located outside the housing and abuts against the recessed relief portion.

3. The elbow telescopic line according to claim 2, characterized in that, When the socket portion is located outside the housing and abuts against the clearance recess, the socket portion is not higher than the clearance recess.

4. The elbow telescopic line according to claim 2, characterized in that, The socket portion extends along a first direction, and along the first direction, the size of the clearance recess is larger than the size of the socket portion.

5. The elbow expansion joint according to claim 4, characterized in that, The joint portion extends along a second direction and along a third direction, the size of the clearance recess is larger than the size of the joint portion; Wherein, the first direction is perpendicular to the second direction, and the third direction is perpendicular to both the first direction and the second direction.

6. The elbow expansion joint according to claim 5, characterized in that, The connector is provided with an action part, which is used to be gripped so that the winding structure can drive the wire out of the housing.

7. The elbow expansion joint according to claim 6, characterized in that, The functional part is a functional protrusion provided in the joint portion.

8. The elbow telescopic line according to claim 6, characterized in that, The functional part consists of two parts, which are symmetrically distributed on both sides of the joint part along the third direction.

9. The elbow expansion joint according to claim 2, characterized in that, The inner contour of the avoidance recess is a smooth surface.

10. The elbow expansion joint according to any one of claims 1 to 9, characterized in that, It also includes a locking structure for locking the wire when the wire extends out of the housing to a target length.

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