A tail turning device

Abstract

This application provides a tail-turning device, in which multiple conductive electrodes are disposed on a columnar portion; the tail-turning assembly and the power cord assembly are rotatably coupled; the tail-turning assembly includes conductive parts that respectively engage with the multiple conductive electrodes, and the conductive parts are fixedly connected to the tail-turning bracket; the number of conductive parts is the same as the number of conductive electrodes; the radial dimension of the columnar portion decreases along the axial direction of the tail-turning device, and the multiple conductive electrodes are spaced apart along the axial direction; each conductive part includes a first part and a second part that are interconnected, the first part is fixedly connected to the tail-turning bracket and is used for electrical connection with a energized object, the second part rotatably engages with the conductive electrode, and the multiple second parts are spaced apart along the axial direction within the internal space of the tail-turning bracket, the dimension of the internal space decreasing stepwise along the axial direction. This allows the power cord to carry a large current and rotate freely 360° while reducing the size of the tail-turning device, reducing the internal space occupied, and improving ventilation.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, and in particular relates to a tail-turning device. Background Technology

[0002] Existing swivel devices are used in most small household appliances, such as hair dryers and curling irons with airflow channels. In order to prevent the power cord from curling during use and improve the user experience, small household appliances usually use swivel devices to allow the power cord to rotate freely 360°.

[0003] Furthermore, for some hair dryers and curling irons with complex functions, these products usually have an air inlet at the location of the power cord to allow airflow to enter the product and then be discharged to achieve the corresponding function. This requires the power cord to carry a large current while being able to rotate freely 360°. However, the existing tail-turning device is relatively bulky, occupies a large internal space, and easily obstructs the ventilation channel at the tail of the small appliance, resulting in poor ventilation channel smoothness. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a tail-turning device that allows the power cord to carry a large current while rotating freely 360°, while simultaneously reducing the size of the tail-turning device, minimizing internal space occupation, and improving ventilation.

[0005] A tail-turning device includes a power cord assembly, the power cord assembly including a columnar portion, on which a plurality of conductive electrodes are disposed;

[0006] A tail-turning assembly, which is rotatably engaged with the power cord assembly;

[0007] The tail-turning assembly includes a tail-turning bracket and conductive parts that respectively cooperate with multiple conductive electrodes. The conductive parts are fixedly connected to the tail-turning bracket. The number of conductive parts is the same as the number of conductive electrodes.

[0008] The radial dimension of the columnar portion decreases along the axial direction of the rotating tail device, and the plurality of conductive electrodes are arranged at intervals along the axial direction.

[0009] Each of the conductive parts includes a first part and a second part that are connected to each other. The first part is fixedly connected to the rotating tail bracket and is used for electrical connection with a energized object. The second part is rotatably engaged with the conductive electrode. A plurality of the second parts are arranged at intervals along the axial direction within the internal space of the rotating tail bracket. The size of the internal space decreases in a stepwise manner along the axial direction.

[0010] The advantages are that the internal space dimensions of the rotating tail bracket decrease in a stepped manner along the axial direction, resulting in a smaller size of the rotating tail bracket, which reduces the space occupied during assembly and improves the ventilation of the product. By setting multiple conductive electrodes on the columnar part and reducing the radial dimension of the columnar part along the axial direction of the rotating tail device, and arranging the multiple conductive electrodes at intervals along the axial direction, the first part of the conductive part is electrically connected to the energized object, and the second part of the conductive part rotates and engages with the conductive electrodes. This fully utilizes the internal space of the rotating tail bracket, making the structure of the rotating tail device compact. It can both pass high current to meet the power supply requirements of the complex functions of the whole product and realize 360° rotation of the power cord, while also reducing the size and weight, reducing the space occupied by the whole product, and integrating some electronic components into the rotating tail device to improve assembly efficiency.

[0011] Preferably, the second part includes an arc-shaped portion, the conductive electrode is columnar and fixedly connected to the columnar portion, the arc-shaped portion is arranged around the conductive electrode and contacts and cooperates with the conductive electrode to achieve electrical connection, the internal space is divided into multiple sub-spaces along the axial direction, the radial dimension of the conductive electrode decreases stepwise along the axial direction and the dimensions of the multiple sub-spaces decrease stepwise, and multiple second parts are respectively arranged in multiple sub-spaces.

[0012] The advantage is that the second part is positioned within the tail-turning bracket in a reasonable manner, making the tail-turning device structure compact.

[0013] Preferably, the second portion has an opening, the size of which is smaller than the radial dimension of the arcuate portion, the adjacent openings are in different directions, and the radial dimension of the arcuate portion is the same as the radial dimension of the conductive electrode.

[0014] The advantage is that it effectively utilizes the internal space of the tail support, improving space utilization. The radial dimension of the arc-shaped part is the same as the radial dimension of the conductive electrode, improving the reliability of the fit between the arc-shaped part and the conductive electrode.

[0015] Preferably, the tail bracket has a circular hole for cooperating with the power cord assembly; a plurality of the conductive electrodes pass through the circular hole, and the tail bracket has a baffle inside, the baffle is located on the side of the circular hole, and the width of the baffle extending from the inner wall of the tail bracket toward the circular hole in a direction perpendicular to the axis is L, 0.5mm≤L≤1mm.

[0016] The advantages are that when the power cord assembly passes through the circular hole, it facilitates the cooperation between the power cord assembly and the tail bracket, making it easier to control the swaying amplitude of the power cord assembly, thereby improving the reliability of the cooperation between the conductive electrode and the conductive part. The baffle ribs limit the outward deformation of the second part, thus preventing poor conductivity. A value of 0.5mm ≤ L ≤ 1mm improves conductivity reliability by limiting the deformation of the second part and preventing poor conductivity. When L < 0.5mm, the baffle ribs cannot limit excessive deformation of the second part; excessive outward deformation of the second part will lead to poor conductivity. When L > 1mm, the baffle ribs occupy a large internal space, which will increase the size of the tail bracket to some extent.

[0017] Preferably, the tail support is provided with multiple support platforms, the support platforms and the side walls of the tail support define the internal space, the support platforms extend from the outside towards the axis, the tail support is provided with at least one first through hole, the first through hole penetrates the support platform, and the first part passes through the first through hole so that part of the first part extends out of the internal space.

[0018] The advantage is that the first through hole is located on the periphery of the rotating tail bracket, which allows the side wall of the rotating tail bracket to fix the conductive part. At the same time, the first part passing through the first through hole can also realize the electrical connection between the first part and other components.

[0019] Preferably, the first part includes a connection terminal for electrical connection with an energized object and a connection portion detachably connected to the connection terminal. The connection portion is integrally connected to the second part. One of the connection terminal and the connection portion is provided with a positioning hole along the axial direction, and the other is provided with a positioning post that cooperates with the positioning hole. The connection terminal passes through the first through hole so that a portion of the connection terminal protrudes out of the internal space.

[0020] The advantages are that by making the connecting terminal detachably connected to the second part, the materials, dimensions, and thicknesses of the connecting terminal and the second part can be selected according to different design requirements, improving design flexibility and structural reliability. Furthermore, the use of positioning holes and positioning posts helps reduce assembly difficulty and improve assembly efficiency.

[0021] Preferably, the distance between the second part and the retaining rib in the direction perpendicular to the axis is X, where 0.2mm≤X≤0.5mm.

[0022] The advantage is that it allows for smooth assembly of the power cord assembly while limiting excessive deformation of the second part, which could lead to poor conductivity. If X < 0.2 mm, it can easily affect the assembly of the tail-turning device and the power cord assembly, causing friction between the conductive part and the conductive electrode during assembly, thus affecting conductivity. If X > 0.5 mm, if the second part undergoes excessive deformation during assembly, it may be difficult to restore its original shape, resulting in poor conductivity due to difficulty in proper contact between the conductive part and the conductive electrode.

[0023] Preferably, the thickness of the connecting terminal is greater than the thickness of the second part, and the ratio of the thickness of the connecting terminal to the thickness of the second part is 2:1.

[0024] The advantages are that it satisfies the requirement of the conductive part to carry a large current while also meeting the need for the power cord assembly to rotate 360°, and reduces wear during rotation. If the second part is too thick, it will result in insufficient elasticity, causing greater wear on the power cord assembly during rotation and making processing difficult. If the second part is too thin, it will be prone to deformation, leading to poor conductivity. If the thickness of the connecting terminals is too thick, it will increase material usage and thus increase costs. If the thickness of the connecting terminals is too thin, it will not be able to meet the requirement of the conductive part to carry a large current, making it unsuitable for products that require high current to meet corresponding functional requirements.

[0025] Preferably, the first part is provided with a first locking part, which is located on the part of the first part that extends out of the first through hole, and the first locking part abuts against the support platform.

[0026] The advantage is that it can restrict the movement of the first part, prevent the first part from detaching from the first through hole, and make the structure more stable.

[0027] Preferably, the conductive electrodes are four in number: a live wire electrode, a protection plate positive electrode, a negative power supply and signal electrode, and a neutral wire electrode. The four electrodes are arranged sequentially along the axial direction. The neutral wire electrode is a solid column that penetrates the interior of the column. The live wire electrode, the protection plate positive electrode, the negative power supply and signal electrode are hollow columns that are fitted onto the outside of the column.

[0028] The advantage is that integrating multiple conductive electrodes onto the tail-turning device reduces the number of charging and discharging electronic components inside the machine using the tail-turning device, thus improving assembly efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the tail-turning device described in this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the tail-turning component of the tail-turning device described in this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the conductive electrode and conductive part of the tail-turning device described in this utility model;

[0032] Figure 4 This is a schematic diagram of the power cord assembly of the tail-turning device described in this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the tail-turning bracket of the tail-turning device described in this utility model;

[0034] Figure 6 yes Figure 5 A schematic diagram of the tail-turning bracket of the tail-turning device shown from another perspective;

[0035] Figure 7 This is an exploded view of the tail-turning component of the tail-turning device described in this utility model;

[0036] Figure 8 This is a schematic diagram of the conductive part of the tail-turning device described in this utility model;

[0037] Figure 9 This is a schematic diagram of the connection terminals of the tail-turning device described in this utility model;

[0038] Figure 10 This is a schematic diagram of the conductive part of the tail-turning device described in this utility model;

[0039] Figure 11 This is a cross-sectional view of the tail-turning device described in this utility model in a direction parallel to the axis.

[0040] Figure 12 This is a cross-sectional view of the tail-turning bracket of the tail-turning device described in this utility model;

[0041] Figure 13 This is a cross-sectional view of the tail-turning device described in this utility model in the direction perpendicular to the axis.

[0042] The names of the components shown in the diagram are as follows:

[0043] 10. Power cord assembly; 20. Tail-turning assembly; 1. Columnar part; 101. Conductive electrode; 2. Tail-turning bracket; 201. Internal space; 2011. Subspace; 3. Conductive part; 301. First part; 3011. Connecting terminal; 3012. Connecting part; 302. Second part; 3021. Arc-shaped part; 3022. Opening; 202. Bearing platform; 5. Circular hole; 6. Retaining rib; 701. First through hole; 702. Positioning hole; 8. First locking part; 901. Positioning post; 1011. Live wire electrode; 1012. Positive electrode of protection plate; 1013. Negative power supply and signal electrode; 1014. Neutral wire electrode; 4. Axial direction. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] like Figure 1-13 As shown, a tail-turning device includes a power cord assembly 10, the power cord assembly 10 including a columnar portion 1, and a plurality of conductive electrodes 101 disposed on the columnar portion 1;

[0048] Tail-turning assembly 20, which is rotatably engaged with the power cord assembly 10;

[0049] The tail-turning assembly 20 includes a tail-turning bracket 2 and conductive parts 3 that respectively cooperate with a plurality of conductive electrodes 101. The conductive parts 3 are fixedly connected to the tail-turning bracket 2, and the number of conductive parts 3 is the same as the number of conductive electrodes 101.

[0050] The radial dimension of the columnar portion 1 decreases along the axial direction 4 of the rotating tail device, and the plurality of conductive electrodes 101 are arranged at intervals along the axial direction 4.

[0051] Each of the conductive parts 3 includes a first part 301 and a second part 302 that are connected to each other. The first part 301 is fixedly connected to the rotating tail bracket 2 and is used to electrically connect to a energized object. The second part 302 is rotatably engaged with the conductive electrode 101. A plurality of the second parts 302 are arranged at intervals along the axial direction 4 in the internal space 201 of the rotating tail bracket 2. The size of the internal space 201 decreases in a stepwise manner along the axial direction 4.

[0052] The radial dimension of the columnar portion 1 decreases along the axial direction 4 of the rotating tail device, and the internal space 201 of the rotating tail bracket 2 decreases in a stepped manner along the axial direction 4. This arrangement reduces the volume of the rotating tail bracket 2, thereby reducing the space occupied in assembly and improving the ventilation of the product. By setting multiple conductive electrodes 101 on the columnar portion 1 with the radial dimension of the columnar portion 1 decreasing along the axial direction 4 of the rotating tail device, and by arranging the multiple conductive electrodes 101 at intervals along the axial direction 4, the first part 301 of the conductive portion 3 is electrically connected to the energized object, and the second part 302 of the conductive portion 3 is rotatably engaged with the conductive electrodes 101. This fully utilizes the internal space 201 of the rotating tail bracket 2, making the rotating tail device compact. It can both pass high current to meet the power requirements of the complex functions of the whole product and achieve 360° rotation of the power cord, while also reducing the size and weight, reducing the space occupied by the whole product, and integrating some electronic components into the rotating tail device to improve assembly efficiency.

[0053] like Figure 3 , 4 As shown in Figures 6, 8, 10, 11, and 12, the second part 302 includes an arc-shaped portion 3021. The conductive electrode 101 is columnar and fixedly connected to the columnar portion 1. The arc-shaped portion 3021 is arranged around the conductive electrode 101 and contacts and engages with the conductive electrode 101 to achieve electrical connection. The internal space 201 is divided into multiple sub-spaces 2011 along the axial direction. The radial dimension of the conductive electrode 101 decreases in a stepwise manner along the axial direction, and the dimensions of the multiple sub-spaces also decrease in a stepwise manner. Multiple second parts 302 are respectively arranged in multiple sub-spaces 2011. This arrangement rationally positions the second parts 302 within the tail-turning bracket 2, making the tail-turning device structure compact.

[0054] Furthermore, the second portion 302 has an opening 3022, the size of which is smaller than the radial dimension of the arcuate portion 3021, the directions of adjacent openings 3022 are different, and the radial dimension of the arcuate portion 302 is the same as the radial dimension of the conductive electrode 101.

[0055] This design effectively utilizes the internal space 201 of the tail support 2, improving space utilization. The radial dimension of the arc-shaped portion 3021 is the same as the radial dimension of the conductive electrode 101, enhancing the reliability of the fit between the arc-shaped portion 3021 and the conductive electrode 101.

[0056] like Figure 2 , 5 As shown in Figures 6, 7, 12, and 13, the tail-turning bracket 2 has a circular hole 5 for cooperating with the power cord assembly 10; multiple conductive electrodes 1 pass through the circular hole 5. The tail-turning bracket 2 has a baffle 6 inside, located on the side of the circular hole 5. The baffle 6 extends from the inner wall of the tail-turning bracket 2 toward the circular hole 5 in a direction perpendicular to the axis with a width L, 0.5mm ≤ L ≤ 1mm.

[0057] This configuration facilitates the cooperation between the power cord assembly 10 and the tail support 2 when the power cord assembly 10 passes through the circular hole 5, making it easier to control the swaying amplitude of the power cord assembly 10 and thus improving the reliability of the cooperation between the conductive electrode 1 and the conductive part. The baffle 6 limits the outward deformation of the second part 302, preventing poor conductivity. A value of 0.5mm ≤ L ≤ 1mm improves conductivity reliability by limiting the deformation of the second part 302 with the baffle 6, preventing poor conductivity. When L < 0.5mm, the baffle 6 cannot limit excessive deformation of the second part 302, leading to poor conductivity. When L ≥ 1mm, the baffle 6 occupies a large internal space 201, which may increase the size of the tail device. In this embodiment, L = 0.83mm. This configuration prevents the second part 302 from deforming outward and causing poor conductivity while also preventing the baffle 6 from occupying a large internal space 201.

[0058] Understandably, the baffle 6 can be integrally formed with the tail support 2, which simplifies the production process and reduces costs.

[0059] Furthermore, such as Figure 13 As shown, the distance X between the second part 302 and the baffle 6 in the direction perpendicular to the axis 4 is 0.2mm ≤ X ≤ 0.5mm. This ensures smooth assembly of the power cord assembly while limiting excessive deformation of the second part 3021, which could lead to poor conductivity. If X < 0.2mm, it can easily affect the assembly of the tail-turning device and the power cord assembly, causing friction between the conductive part 3 and the conductive electrode 101 during assembly, affecting conductivity. If X > 0.5mm, if the second part 302 undergoes significant deformation during assembly, it may be difficult to restore its original shape, resulting in poor conductivity due to difficulty in proper contact between the conductive part 3 and the conductive electrode 101. In this embodiment, X = 0.4mm, which reduces friction and prevents deformation from becoming difficult to restore during the assembly of the conductive part 3 and the conductive electrode 101.

[0060] like Figure 2 , 5 As shown in Figures 6, 7, and 12, the rotating tail support 2 is provided with multiple supporting platforms 202. The supporting platforms 202 and the sidewalls of the rotating tail support 2 define the internal space 201. The supporting platforms extend from the outside towards the axis. The rotating tail support 2 is provided with at least one first through hole 701, which penetrates the supporting platform 202. The first part 301 passes through the first through hole 701, allowing a portion of the first part 301 to extend out of the internal space 201. With this arrangement, the first through hole 701 is located on the periphery of the rotating tail support 2, enabling the sidewalls of the rotating tail support 2 to fix the conductive part 3. At the same time, the first part 301 extending out of the first through hole 701 can achieve electrical connection between the first part 301 and other components.

[0061] Furthermore, such as Figure 2 , 7 8, 9, The first part 301 includes a connection terminal 3011 for electrical connection with an energized object and a connection part 3012 detachably connected to the connection terminal 3011. The connection part 3012 is integrally connected to the second part 302. The connection terminal 3011 passes through the first through hole 701 so that a portion of the connection terminal 3011 extends out of the internal space 201.

[0062] This configuration, by making the connecting terminal 3011 and the second part 302 detachably connected, allows for the selection of materials, dimensions, thicknesses, etc. of the connecting terminal 3011 and the second part 302 according to different design requirements, thereby improving design flexibility and enhancing structural reliability.

[0063] Furthermore, such as Figure 7-10 As shown, one of the connecting terminal 3011 and the connecting part 3012 is provided with a positioning hole 702 along the axial direction, and the other is provided with a positioning post 901 that mates with the positioning hole 702. This arrangement helps to reduce assembly difficulty and improve assembly efficiency.

[0064] Furthermore, such as Figure 2 , 3 As shown in Figures 8, 10, and 12, the first part 301 is provided with a first locking part 8, which is located on the part of the first part 301 that extends through the first through hole 701, and the first locking part 8 abuts against the bearing platform 202.

[0065] With this configuration, the first locking part 8 abuts against the bearing platform 202 of the rotating tail bracket 2, which can restrict the first part 301 and prevent the first part 301 from dislodging from the first through hole 701, making the structure more stable.

[0066] Furthermore, such as Figure 7-10 As shown, the thickness of the connecting terminal 3011 is greater than the thickness of the second part 302, and the thickness ratio of the connecting terminal 3011 to the second part 302 is 2:1. Furthermore, the thickness of the connecting part 3012, which is integrally connected to the second part 302, is the same as that of the second part 302. This configuration satisfies the requirement that the conductive part 3 can carry a large current while also allowing the power cord assembly 10 to rotate 360°; at the same time, it reduces wear during the rotational engagement process. If the second part 302 is too thick, it will result in insufficient elasticity, causing significant wear on the power cord assembly 10 during rotation and making processing difficult. If the second part 302 is too thin, it will be prone to deformation, leading to poor conductivity. If the connecting terminal 3011 is too thick, it will increase material usage and thus increase costs. If the connecting terminal 3011 is too thin, it will not be able to carry a large current, making it unsuitable for products that require high current to meet corresponding functional requirements. In this embodiment, the thickness of the connecting terminal 3011 is 0.8 mm, and the thickness of the second part 302 is 0.4 mm. This arrangement ensures its elasticity.

[0067] like Figure 3 , 4 As shown, the conductive electrode 101 comprises four electrodes: a live wire electrode 1011, a protection plate positive electrode 1012, a negative power supply and signal electrode 1013, and a neutral wire electrode 1014. These four electrodes are arranged sequentially along the axial direction. The neutral wire electrode 1014 is a solid column that penetrates the interior of the columnar portion 1. The live wire electrode 1011, the protection plate positive electrode 1012, and the negative power supply and signal electrode 1013 are hollow columns that fit around the columnar portion 1. This arrangement integrates multiple conductive electrodes 101 onto the tail-turning device, reducing the number of charging and discharging electronic components inside the machine using the tail-turning device and improving assembly efficiency.

[0068] The second portions 302 of the four conductive parts 3 are respectively disposed on the four conductive electrodes 101 along the axial direction and rotate in cooperation with them. The conductive parts 3 that rotate in cooperation with the neutral electrode 1014, the positive electrode 1012 of the protection board, the negative power supply electrode, and the signal electrode 1013 are connected to the PCB board inside the machine. The conductive parts 3 that rotate in cooperation with the live electrode 1011 are connected to the control switch of the machine. The PCB board and the conductive parts 3 that rotate in cooperation with the live electrode 1011 are connected through the control switch.

[0069] The present application has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present application based on these embodiments, all of which fall within the protection scope of the present application.

Claims

1. A tail-turning device, characterized in that, It includes a power cord assembly, the power cord assembly including a columnar portion, on which a plurality of conductive electrodes are disposed; A tail-turning assembly, which is rotatably engaged with the power cord assembly; The tail-turning assembly includes a tail-turning bracket and conductive parts that respectively cooperate with multiple conductive electrodes. The conductive parts are fixedly connected to the tail-turning bracket. The number of conductive parts is the same as the number of conductive electrodes. The radial dimension of the columnar portion decreases along the axial direction of the rotating tail device, and the plurality of conductive electrodes are arranged at intervals along the axial direction. Each of the conductive parts includes a first part and a second part that are connected to each other. The first part is fixedly connected to the rotating tail bracket and is used for electrical connection with a energized object. The second part is rotatably engaged with the conductive electrode. A plurality of the second parts are arranged at intervals along the axial direction within the internal space of the rotating tail bracket. The size of the internal space decreases in a stepwise manner along the axial direction.

2. The tail-turning device according to claim 1, characterized in that, The second part includes an arc-shaped portion, the conductive electrode is columnar and fixedly connected to the columnar portion, the arc-shaped portion is arranged around the conductive electrode and contacts and cooperates with the conductive electrode to achieve electrical connection, the internal space is divided into multiple sub-spaces along the axial direction, the radial dimension of the conductive electrode decreases stepwise along the axial direction and the dimensions of the multiple sub-spaces decrease stepwise, and multiple second parts are respectively arranged in multiple sub-spaces.

3. The tail-turning device according to claim 2, characterized in that, The second part has an opening, the size of which is smaller than the radial dimension of the arcuate portion, the adjacent openings are in different directions, and the radial dimension of the arcuate portion is the same as the radial dimension of the conductive electrode.

4. The tail-turning device according to claim 2, characterized in that, The tail bracket is provided with a circular hole for cooperating with the power cord assembly; a plurality of conductive electrodes pass through the circular hole, and the tail bracket is provided with a baffle inside, the baffle being located on the side of the circular hole, and the width of the baffle extending from the inner wall of the tail bracket toward the circular hole in a direction perpendicular to the axis is L, 0.5mm≤L≤1mm.

5. The tail-turning device according to claim 1, characterized in that, The tail-turning bracket is provided with multiple support platforms. The support platforms and the side walls of the tail-turning bracket define the internal space. The support platforms extend from the outside towards the axis. The tail-turning bracket is provided with at least one first through hole. The first through hole penetrates the support platform. The first part passes through the first through hole so that part of the first part extends out of the internal space.

6. The tail-turning device according to claim 5, characterized in that, The first part includes a connection terminal for electrical connection with an energized object and a connection portion detachably connected to the connection terminal. The connection portion is integrally connected to the second part. One of the connection terminal and the connection portion is provided with a positioning hole along the axial direction, and the other is provided with a positioning post that cooperates with the positioning hole. The connection terminal passes through the first through hole so that a portion of the connection terminal protrudes out of the internal space.

7. The tail-turning device according to claim 4, characterized in that, The distance between the second part and the retaining rib in the direction perpendicular to the axis is X, where 0.2mm≤X≤0.5mm.

8. A tail-turning device according to claim 6, characterized in that, The thickness of the connecting terminal is greater than the thickness of the second part, and the ratio of the thickness of the connecting terminal to the thickness of the second part is 2:

1.

9. A tail-turning device according to claim 5, characterized in that, The first part is provided with a first locking part, which is located on the part of the first part that extends out of the first through hole, and the first locking part abuts against the support platform.

10. A tail-turning device according to any one of claims 1-9, characterized in that, The conductive electrodes are four in number: a live wire electrode, a protection plate positive electrode, a negative power supply and signal electrode, and a neutral wire electrode. The four electrodes are arranged sequentially along the axis. The neutral wire electrode is a solid column that penetrates the interior of the column. The live wire electrode, the protection plate positive electrode, the negative power supply and signal electrode are hollow columns that are fitted onto the outside of the column.

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