Self-locking mechanism, cable reel and charging cable

Abstract

The present invention relates to a self-locking mechanism, a cable reel and a charging cable. The self-locking mechanism includes: a base, a gear plate, a toggle member, a rotary wheel cover, and a magnetic attraction component; the gear plate is rotatably connected to the base, and the gear plate is provided with a plurality of adjacent and spaced first tooth grooves and second tooth grooves; the magnetic attraction component includes a first magnetic attraction member fixed to a mounting portion, and a second magnetic attraction member fixed to the base and attracted to the first magnetic attraction member, and the first magnetic attraction member and the second magnetic attraction member are spaced apart. By fixing the first magnetic attraction member to the mounting portion and fixing the second magnetic attraction member to the base, the technical problem of the toggle member always being in close contact with the rotary wheel cover is overcome. Since the first magnetic attraction member and the second magnetic attraction member rely on the magnetic field for attraction, they will not fail to be in close contact with the rotary wheel cover due to the high frequency of the self-locking mechanism, thereby achieving the technical effect of accurate self-locking and long service life.

Description

Technical Field

[0001] The invention relates to the field of digital products, and in particular to a self-locking mechanism, a cable reel and a charging cable. Background Art

[0002] With the continuous development of digital technology, the variety of digital products is becoming more and more diversified. Although the functions and effects of various products are different, they all cannot avoid the problem of charging. Wireless charging designs have also appeared on the market, but the vast majority of digital products still use wired charging, mainly because wired charging is reliable. Therefore, there are also various charging cables on the market, and the length of the charging cable is also selected according to the actual needs of the user. Although a longer charging cable can solve a lot of conveniences, it also has the problem of inconvenient collection. At present, there are also products that use a reel to recycle data cables, such as a reel and a charging cable disclosed in Patent No.: 201320624168.0 The device controls the length of the data cable through the self-locking mechanism in the reel. The elastic device is mainly used to control the connection rod to fit with the outer edge of the reel cover, so as to solve the problem of adjusting the connection rod angle when the reel cover is in different rotation states, and then complete the self-locking of the reel. However, there is a problem: how to select the elastic coefficient of the spring. If the elastic coefficient of the selected spring is large, the connection rod and the reel cover fit tightly, and a large force is required to pull out the data cable. If the elastic coefficient is small, it is easy to deform after frequent stretching, and then the connection rod cannot fit closely with the reel cover, resulting in the reel cover being unable to drive the connection rod to rotate during the rotation process, and thus the reel cannot self-lock. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a self-locking mechanism, a cable reel and a charging cable to solve the problem that the self-locking mechanism in the cable reel cannot ensure accurate self-locking under high frequency of use.

[0004] In order to solve the above technical problems, an embodiment of the present invention proposes a self-locking mechanism, including: a base, a gear plate, a toggle member, a wheel cover, and a magnetic attraction component; the gear plate is rotatably connected to the base, and the gear plate is provided with a plurality of first tooth grooves and second tooth grooves that are adjacent and spaced apart; the toggle member is rotatably connected to the base, and the toggle member includes a body, a mounting portion, a first protrusion, a second protrusion, and a third protrusion provided on the body; the wheel cover is rotatably connected to the base, and the wheel cover is provided with a plurality of slots; the magnetic attraction component includes a fixed portion on the mounting portion A first magnetic member, and a second magnetic member fixed to the base and attracted to the first magnetic member, the first magnetic member and the second magnetic member are arranged at an interval; the gear plate is also provided with a first step portion located in the first tooth groove; when the second protrusion is inserted into the second tooth groove, the second protrusion presses the outer wall of the first step portion; when the wheel cover rotates, the second magnetic member attracts the first magnetic member, so that the third protrusion of the toggle member is close to the wheel cover; when the first protrusion is inserted into the first tooth groove or the second tooth groove, the first protrusion drives the gear plate to rotate.

[0005] Further, the first magnetic attraction member is a magnet / iron block, and the second magnetic attraction member is an iron block / magnet; or, the first magnetic attraction member and the second magnetic attraction member are magnets.

[0006] Furthermore, the rotation center of the toggle member is located at an end away from the third protrusion, and the rotation center of the toggle member is located outside the first protrusion and the second protrusion.

[0007] Furthermore, the mounting portion is arranged outside the rotation center of the toggle member and is located at an end away from the third protrusion.

[0008] Furthermore, the mounting portion is provided with a first mounting groove for fixing the first magnetic attraction component; and the base is provided with a second mounting groove for fixing the second magnetic attraction component.

[0009] Furthermore, the body is an annular hollow structure; the first protrusion, the second protrusion and the third protrusion are respectively located on the inner side wall of the body; the second protrusion extends from the end face of the gear plate to the outside of the end face of the body.

[0010] Furthermore, the first protrusion and the second protrusion are wedge-shaped structures, and the top ends of the first protrusion and the second protrusion away from the main body are provided with arc portions for transition between the two wedge-shaped surfaces; the tooth portion of the gear plate is provided with a first inclined surface; the first inclined surface matches the wedge-shaped surface of the first protrusion on one side close to the gear plate; the outer side wall of the first step portion is provided with a second inclined surface; the second inclined surface matches the wedge-shaped surface of the second protrusion on one side close to the gear plate; the inclination directions of the first inclined surface and the second inclined surface are consistent.

[0011] Correspondingly, an embodiment of the present invention also provides a cable reel, comprising a cable reel rotatably connected to the base, and a clockwork spring; the wheel cover is fixed to the end surface of the cable reel close to the toggle member; the cable reel is provided with a cavity for installing the clockwork spring.

[0012] Correspondingly, an embodiment of the present invention also provides a charging data cable, which includes the above-mentioned cable reel, a shell for installing the cable reel, an output wire, an input wire, a first circuit board, and a second circuit board; the output wire is wound on the cable reel; the shell includes the base; the head end of the output wire is electrically connected to the first circuit board; the first circuit board is fixed to the end surface of the cable reel and is located at the end away from the rotor cover, and the first circuit board is provided with a brush group; the brush group includes a plurality of conductive terminals arranged radially; the end of the input wire is electrically connected to the second circuit board; the second circuit board is provided with a plurality of annular conductive rings that are concentrically arranged and in sliding contact with the conductive terminals.

[0013] Furthermore, the end of the output wire is connected to a magnetic female connector and a magnetic male connector that engages with the magnetic female connector; the head end of the input wire is connected to a USB interface.

[0014] The embodiment of the present invention proposes a self-locking mechanism, wherein the magnetic attraction component includes a first magnetic attraction member fixed to the mounting portion, and a second magnetic attraction member fixed to the base and attracted to the first magnetic attraction member. When the rotary wheel cover is rotated by an external force, the first protrusion is inserted into the first tooth groove and drives the gear plate to rotate, the second protrusion is away from the gear plate, and the third protrusion is separated from the slot without affecting the rotation of the rotary wheel cover. Since the first magnetic attraction member and the second magnetic attraction member on the base attract each other, the third protrusion is always in close contact with the rotary wheel cover. Therefore, when the rotary wheel cover rotates, the third protrusion will drive the toggle member to rotate in the opposite direction under the drive of the rotary wheel cover, and the toggle member will rotate in the opposite direction. After the moving part rotates to a certain angle, the second protrusion is inserted into the first tooth groove and presses against the outer wall of the first step portion, and the first protrusion is away from the gear plate. Due to the limiting effect of the first step portion, the third protrusion cannot be separated from the slot and locks the rotation of the wheel cover, thereby achieving the purpose of self-locking. When unlocking, the wheel cover is rotated again by external force, and the wheel cover will also drive the third protrusion to rotate, and the toggle member also deflects at an angle, and the second protrusion is away from the first tooth groove. The first protrusion is inserted into the second tooth groove and drives the gear plate to rotate. When the external force disappears, the wheel cover rotates, the second protrusion is inserted into the second tooth groove, and the third protrusion is separated from the slot. By fixing the first magnetic attraction member on the mounting part and fixing the second magnetic attraction member on the base, the technical problem of the toggle member always being close to the wheel cover is overcome. Since the first magnetic attraction member and the second magnetic attraction member rely on the magnetic field for attraction, they will not be unable to be close to the wheel cover due to the high frequency of the self-locking mechanism, thereby achieving the technical effect of accurate self-locking and high service life.

[0015] Furthermore, the main body is an annular hollow structure, and the first protrusion, the second protrusion and the third protrusion are respectively located on the inner wall of the main body. The distance between the third protrusion and the first protrusion and the second protrusion is increased by the hollow annular structure, so as to achieve a self-locking effect when the toggle member is rotated at a smaller angle. When the toggle member is rotated at a smaller angle, the attraction between the first magnetic suction member and the second magnetic suction member is more obvious.

[0016] A cable reel provided by an embodiment of the present invention pays out the line under the action of an external force, and self-locks through a self-locking mechanism after the line is paid out, thereby achieving the problem of locking the line-paying length. After the cable reel is unlocked, the cable reel rotates to reel in the line under the action of a clockwork spring, and the self-locking mechanism does not limit the cable reel, and therefore, does not affect the reeling action of the cable reel. Since there is a magnetic attraction force between the first magnetic attraction member and the second magnetic attraction member, when the cable reel is reeled in, the toggle member will automatically return to a balanced state.

[0017] A charging data cable provided by an embodiment of the present invention adopts the above-mentioned cable reel. Since the self-locking mechanism in the cable reel is accurate in self-locking and has a long service life, the problem that the existing charging data cable cannot self-lock due to frequent use is solved.

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the self-locking mechanism of the present invention at a balanced position;

[0020] Figure 2 It is a front view of the self-locking mechanism of the present invention in the first state of rotation under external force;

[0021] Figure 3 It is a front view of the self-locking position of the self-locking mechanism of the present invention;

[0022] Figure 4 It is a front view of the self-locking mechanism of the present invention in the second state of rotation by external force;

[0023] Figure 5 It is a front view of the unlocking position of the self-locking mechanism of the present invention;

[0024] Figure 6 FIG. 1 is an installation diagram of a cable reel of the cable reel of the present invention;

[0025] Figure 7 is a cross-sectional view of the charging data cable of the present invention;

[0026] Figure 8 This is an exploded view of the charging data cable of the present invention.

[0027] Description of Figure Numbers:

[0028] 10 Self-locking mechanism 20 Cable reel

[0029] 30 Charging data cable 1 Gear plate

[0030] 11 First tooth groove 12 Second tooth groove

[0031] 13 First step 2 Toggle member

[0032] 21 body 211 first protrusion

[0033] 212 second protrusion 213 third protrusion

[0034] 22 mounting portion 221 first mounting groove

[0035] 3 Wheel cover 31 Card slot

[0036] 4 Magnetic attraction component 41 first magnetic attraction component

[0037] 42 second magnetic attraction member 51 cavity

[0038] 5 Reel 6 Spring

[0039] 7 Output wire 71 Female connector

[0040] 8 Input wire 81 USB interface

[0041] 91 first circuit board 92 second circuit board

[0042] 93 brush set 94 conductive ring. DETAILED DESCRIPTION

[0043] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated below in conjunction with schematic diagrams, but is not limited thereto.

[0044] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back, etc.), they are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0046] A self-locking mechanism includes: a base, a gear plate, a toggle, a wheel cover, and a magnetic component. The gear plate is rotatably connected to the base, and the gear plate is provided with a plurality of first tooth grooves and second tooth grooves that are adjacent and spaced apart. The toggle is rotatably connected to the base, and the toggle includes a body, a mounting portion, a first protrusion, a second protrusion, and a third protrusion that are provided on the body. The wheel cover is rotatably connected to the base, and the wheel cover is provided with a plurality of slots; the magnetic component includes a first magnetic component fixed to the mounting portion, and a second magnetic component fixed to the base and attracted to the first magnetic component, and the first magnetic component and the second magnetic component are spaced apart. The gear plate is also provided with a first step portion located in the first tooth groove. When the second protrusion is inserted into the second tooth groove, the second protrusion presses against the outer wall of the first step portion. When the wheel cover rotates, the second magnetic component attracts the first magnetic component, so that the third protrusion of the toggle member is close to the wheel cover; when the first protrusion is inserted into the first tooth groove or the second tooth groove, the first protrusion drives the gear plate to rotate.

[0047] When the wheel cover is rotated by external force, the first protrusion is inserted into the first tooth groove / second tooth groove and drives the gear plate to rotate, the second protrusion is away from the gear plate, and the third protrusion is separated from the slot without affecting the rotation of the wheel cover. Since the first magnetic attraction member and the second magnetic attraction member on the base attract each other, the third protrusion is always close to the wheel cover. Therefore, when the wheel cover rotates, the third protrusion will drive the toggle member to rotate in the opposite direction under the drive of the wheel cover. After the toggle member rotates to a certain angle, the second protrusion is inserted into the first tooth groove and presses the outer wall of the first step portion. The first protrusion is away from the gear plate. Due to the limiting effect of the first step portion, the third protrusion cannot be separated from the slot and locks the rotation of the wheel cover, thereby achieving the purpose of self-locking. When unlocking, the wheel cover is rotated again by external force, and the wheel cover will also drive the third protrusion to rotate. The toggle member also deflects an angle, and the second protrusion is away from the first tooth groove. The first protrusion is inserted into the second tooth groove / first tooth groove again and drives the gear plate to rotate. When the external force disappears, the wheel cover rotates, the second protrusion is inserted into the second tooth groove, and the third protrusion is separated from the slot.

[0048] like Figure 1 As shown, a self-locking mechanism 10 includes: a base, a gear plate 1, a toggle member 2, a rotating wheel cover 3, and a magnetic attraction component 4.

[0049] The gear plate 1 is rotatably connected to a base (not shown in the figure). The gear plate 1 is provided with three adjacent and spaced first tooth grooves 11 and second tooth grooves 12 . The gear plate 1 is also provided with a first step portion 13 located in the first tooth groove 11 .

[0050] The toggle member 2 is rotatably connected to the base (not shown in the figure), and the toggle member 2 includes a body 21, a mounting portion 22, and a first protrusion 211, a second protrusion 212, and a third protrusion 213 provided on the body 21. The rotation center of the toggle member 2 is located at an end away from the third protrusion 213, and the rotation center of the toggle member 2 is located outside the first protrusion 211 and the second protrusion 212. The mounting portion 22 is provided outside the rotation center of the toggle member 2 and at an end away from the third protrusion 213.

[0051] The main body 21 is an annular hollow structure, and the first protrusion 211, the second protrusion 212 and the third protrusion 213 are respectively located on the inner wall of the main body 21. The second protrusion 212 extends to the outside of the end face of the main body 21 close to the end face of the gear plate 1. When the second protrusion 212 is inserted into the first tooth groove 11, it will press the outer wall of the first step portion 13, while the second protrusion 212 will not press the outer wall of the first step portion 13.

[0052] The first protrusion 211 and the second protrusion 212 are wedge-shaped structures, and the top ends of the first protrusion 211 and the second protrusion 212 away from the body 21 are provided with arc portions for transition between the two wedge-shaped surfaces. The tooth portion of the gear plate 1 is provided with a first inclined surface, and the first inclined surface matches the wedge-shaped surface of the first protrusion 211 on the side of the gear plate 1. The outer wall of the first step portion 13 is provided with a second inclined surface, and the second inclined surface matches the wedge-shaped surface of the second protrusion 212 on the side of the gear plate 1. The inclination directions of the first inclined surface and the second inclined surface are consistent, so when the first protrusion 211 and the second protrusion 212 are inserted into the first tooth groove 11 and the second tooth groove 12 from the outer edge of the gear plate 1, the gear plate 1 will be driven to rotate.

[0053] The wheel cover 3 is rotatably connected to the base, and the wheel cover 3 is provided with four slots 31 .

[0054] The magnetic component 4 includes a first magnetic member 41 fixed to the mounting portion 22, and a second magnetic member 42 fixed to the base and attracted to the first magnetic member 41. The first magnetic member 41 and the second magnetic member 42 are spaced apart to ensure that the toggle member 2 has the necessary rotation space. The first magnetic member 41 and the second magnetic member 42 are magnets. The mounting portion 22 is provided with a first mounting groove 221 for fixing the first magnetic member 41, and the base (not shown in the figure) is provided with a second mounting groove for fixing the second magnetic member 42.

[0055] Due to the magnetic attraction between the first magnetic component 41 and the second magnetic component 42, when the wheel cover 3 is in the equilibrium position, the distance between the first magnetic component 41 and the second magnetic component 42 on the shifting member 2 is the shortest, and the first protrusion 211 and the second protrusion 212 are not inserted into the first tooth groove 11 and the second tooth groove 12 of the gear plate 1.

[0056] like Figure 2As shown, when the wheel cover 3 rotates clockwise due to external force, the third protrusion 213 is pressed by the inner wall of the slot 31 and also rotates clockwise. The first protrusion 211 is inserted into the first tooth groove 11 and drives the gear plate 1 to rotate, and the second protrusion 212 is away from the gear plate 1. The third protrusion 213 is separated from the slot 31 without affecting the rotation of the wheel cover 3. Due to the magnetic attraction between the first magnetic member 41 and the second magnetic member 42, the third protrusion 213 is always close to the wheel cover 3. Therefore, when the external force on the wheel cover 3 disappears, when the wheel cover 3 rotates counterclockwise, the third protrusion 213 will be inserted into the slot 31 again and pressed by the inner wall of the slot 31, so that the toggle member 2 rotates counterclockwise.

[0057] like Figure 3 As shown, after the toggle member 2 and the wheel cover 3 rotate counterclockwise and exceed the equilibrium position, the second protrusion 212 is inserted into the first tooth groove 11 and presses against the outer wall of the first step portion 13. Due to the limiting effect of the first step portion 13 on the toggle member 2, the third protrusion 213 of the toggle member 2 cannot be separated from the slot 31 and lock the rotation of the wheel cover 3, thereby achieving the purpose of self-locking.

[0058] like Figure 4 As shown, when the wheel cover 3 is unlocked, it also needs to rotate clockwise under the action of external force and exceed the equilibrium position. The third protrusion 213 is pressed by the inner wall of the slot 31 and rotates clockwise. The second protrusion 212 is away from the first tooth groove 11. The first protrusion 211 is inserted into the second tooth groove 12 and drives the gear plate 1 to rotate. Due to the magnetic attraction between the first magnetic attraction member 41 and the second magnetic attraction member 42, the third protrusion 213 is always close to the wheel cover 3. Therefore, when the external force on the wheel cover 3 disappears, when the wheel cover 3 rotates counterclockwise, the third protrusion 213 will be inserted into the slot 31 again and pressed by the inner wall of the slot 31, so that the toggle member 2 rotates counterclockwise.

[0059] like Figure 5 As shown, after the toggle member 2 and the wheel cover 3 rotate counterclockwise and exceed the equilibrium position, the second protrusion 212 is inserted into the second tooth groove 12, and the third protrusion 213 is separated from the slot 31. Due to the magnetic attraction between the first magnetic member 41 and the second magnetic member 42, the third protrusion 213 is always in close contact with the wheel cover 3. Therefore, when the wheel cover 3 completes the rotation, the magnetic attraction between the first magnetic member 41 and the second magnetic member 42 will cause the toggle member 2 and the wheel cover 3 to rotate clockwise to the equilibrium position.

[0060] Since the self-locking mechanism 10 needs to change multiple rotation angles during one rotation, and the third protrusion 213 of the toggle member 2 is closely attached to the wheel cover 3 by relying on the magnetic attraction between the first magnetic member 41 and the second magnetic member 42, fatigue and weakening of the magnetic attraction will not occur even in the case of frequent use, and the service life is long. In addition, the main body 21 is an annular hollow structure, and the first protrusion 211, the second protrusion 212 and the third protrusion 213 are respectively located on the inner side wall of the main body 21. The distance between the third protrusion 213 and the first protrusion 211 and the second protrusion 212 is increased by the hollow annular structure, so as to achieve the self-locking effect of the toggle member 2 at a smaller rotation angle, and the attraction between the first magnetic member 41 and the second magnetic member 42 is more obvious when the toggle member 2 is at a smaller rotation angle.

[0061] like Figure 6 As shown, the cable reel 20 comprises the above-mentioned self-locking mechanism (not shown in the figure), a cable reel 5 rotatably connected to the base, and a spring 6. A rotary cover (not shown in the figure) is fixed to the end surface of the cable reel 5 close to the toggle member (not shown in the figure), and the cable reel 5 is provided with a cavity 51 for mounting the spring 6.

[0062] like Figure 7 and Figure 8 As shown, the charging data cable 30 includes the above-mentioned reel (not shown), a housing for mounting the reel, an output wire 7, an input wire 8, a first circuit board 91, and a second circuit board 92. The housing includes an upper shell 951 and a lower shell 952.

[0063] The output wire 7 is wound on the winding reel 5. In this embodiment, the base of the self-locking mechanism (not shown in the figure) is the shell. The head end of the output wire 7 is electrically connected to the first circuit board 91. The first circuit board 91 is fixed to the end surface of the winding reel 5 and is located at the end away from the rotary cover 3. The first circuit board 91 is provided with a brush group 93. The brush group 93 includes two groups of conductive terminals arranged radially, and the number of conductive terminals in each group is 4. The end of the input wire 8 is electrically connected to the second circuit board 92. The second circuit board 92 is provided with four annular conductive rings 94 that are concentrically arranged and in sliding contact with the conductive terminals.

[0064] The end of the output wire 7 is connected to a magnetic female connector 71 and a magnetic male connector (not shown in the figure) that engages with the magnetic female connector 71 , and the head end of the input wire 8 is connected to a USB interface 81 .

[0065] As an implementation mode, the first magnetic attraction member is a magnet / iron block, and the second magnetic attraction member is an iron block / magnet, that is, one of the two is a magnet and the other is an iron block.

[0066] As an implementation mode, the number of the card slots on the rotating wheel cover is set according to the positioning and self-locking accuracy required for the stretched length of the data line. The more the card slots, the higher the positioning and self-locking accuracy.

[0067] As an implementation mode, the number of first tooth grooves and second tooth grooves on the gear plate is set according to the positioning self-locking accuracy required for the stretched length of the data line. The more the number of first tooth grooves and second tooth grooves is, the higher the positioning self-locking accuracy is.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Self-locking mechanism, characterized in that: include: A base, a gear plate, a toggle member, a wheel cover, and a magnetic attraction component; the gear plate is rotatably connected to the base, and the gear plate is provided with a plurality of first tooth grooves and second tooth grooves that are adjacent and spaced apart; the toggle member is rotatably connected to the base, and the toggle member includes a body, a mounting portion, a first protrusion, a second protrusion, and a third protrusion that are provided on the body; the wheel cover is rotatably connected to the base, and the wheel cover is provided with a plurality of slots; the magnetic attraction component includes a first magnetic attraction member fixed to the mounting portion, and a second magnetic attraction member fixed to the base and attracted to the first magnetic attraction member, and the first magnetic attraction member and the second magnetic attraction member are spaced apart; the gear plate is also provided with a first step portion located in the first tooth groove; The second protrusion extends from the end surface of the gear plate to the outside of the end surface of the body, and when the second protrusion is inserted into the first tooth groove, the second protrusion presses the outer side wall of the first step portion; The rotation center of the toggle member is located at an end away from the third protrusion, and the rotation center of the toggle member is located outside the first protrusion and the second protrusion. When the wheel cover rotates, the second magnetic member attracts the first magnetic member, so that the third protrusion of the toggle member is closely attached to the wheel cover. When the first protrusion is inserted into the first tooth groove or the second tooth groove, the first protrusion drives the gear plate to rotate.

2. The self-locking mechanism according to claim 1, characterized in that: The first magnetic attraction member is a magnet, and the second magnetic attraction member is an iron block; or The first magnetic attraction member is an iron block, and the second magnetic attraction member is a magnet; or The first magnetic attraction member and the second magnetic attraction member are both magnets.

3. The self-locking mechanism according to claim 1, characterized in that: The mounting portion is arranged outside the rotation center of the toggle member and is located at an end away from the third protrusion.

4. The self-locking mechanism according to claim 1, characterized in that: The mounting portion is provided with a first mounting groove for fixing the first magnetic attraction member; the base is provided with a second mounting groove for fixing the second magnetic attraction member.

5. The self-locking mechanism according to claim 1, characterized in that: The body is an annular hollow structure; the first protrusion, the second protrusion and the third protrusion are respectively located on the inner side wall of the body.

6. The self-locking mechanism according to claim 1, characterized in that: The first protrusion and the second protrusion are wedge-shaped structures, and the top ends of the first protrusion and the second protrusion away from the main body are provided with arc portions for transition between the two wedge-shaped surfaces; the tooth portion of the gear plate is provided with a first inclined surface; the first inclined surface matches the wedge-shaped surface of the first protrusion on one side close to the gear plate; the outer side wall of the first step portion is provided with a second inclined surface; the second inclined surface matches the wedge-shaped surface of the second protrusion on one side close to the gear plate; the inclination directions of the first inclined surface and the second inclined surface are consistent.

7. A cable reel, characterized in that: The cable reel comprises the self-locking mechanism described in any one of claims 1-6, a cable reel rotatably connected to the base, and a clockwork spring; the wheel cover is fixed to the end surface of the cable reel close to the toggle member; the cable reel is provided with a cavity for installing the clockwork spring.

8. Charging cable, characterized in that, The charging cable includes the cable reel described in claim 7, a shell for installing the cable reel, an output wire, an input wire, a first circuit board, and a second circuit board; the output wire is wound on the cable reel; the shell includes the base; the head end of the output wire is electrically connected to the first circuit board; the first circuit board is fixed to the end surface of the cable reel and is located at the end away from the rotor cover, and the first circuit board is provided with a brush group; the brush group includes a plurality of conductive terminals arranged radially; the end of the input wire is electrically connected to the second circuit board; the second circuit board is provided with a plurality of annular conductive rings which are concentrically arranged and in sliding contact with the conductive terminals.

9. The charging cable according to claim 8, characterized in that: The end of the output wire is connected with a magnetic female connector and a magnetic male connector that is attracted to the magnetic female connector; the head end of the input wire is connected with a USB interface.

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