Retention device and plug assembly

Abstract

The present application discloses a retaining device and a plug assembly. The retaining device is fitted with a plug including a plug body and a pin connected to the plug body, and can be fitted on at least an outer peripheral surface of one end of the plug body close to the pin. When the plug is inserted into a socket, it can abut against the socket, and by strengthening the connection stability between the plug and the socket, the probability of the plug escaping from the socket can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of electrical components, and particularly to a retaining device and a plug assembly.

Background Art

[0002] With the development of the times, the power of chargers is becoming increasingly high, and the weight of the corresponding charger plugs is also becoming increasingly heavy. Even for high-quality wall sockets, when the charger is plugged into the wall socket for charging, there is a risk that the charger body may tilt or fall. In related technical fields, for wall sockets with poor quality or those that have been used for a long time, during the charging of the charger, since the pins of the charger and the leaf springs of the wall socket are not firmly clamped, phenomena such as the charger tilting or falling from the wall socket may occur.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Embodiments of this application provide a retaining device and a plug assembly that can reduce the probability of the plug escaping from the socket by strengthening the connection stability between the plug and the socket.

Means for Solving the Problems

[0004] In a first aspect, the retaining device according to an embodiment of this application is fitted with a plug including a plug body and pins connected to the plug body, and can be fitted on at least the outer peripheral surface of one end of the plug body close to the pins. When the plug is inserted into the socket, it can abut against the socket.

[0005] According to the anti-loosening device of the embodiment of the present application, when the plug is inserted into the socket, the plug receives its own gravity, the pins of the plug receive the frictional force of the plug bush in the socket, and at the contact surface between the plug and the socket, the point farthest from the pins and located below the pins becomes the torque point. A moment is generated to try to pull the plug out of the socket by the gravity of the plug, and the moment generated by the frictional force between the plug and the socket is in the opposite direction to the moment generated by the plug, preventing the plug from coming out of the socket. The anti-loosening device is fitted on the outer peripheral surface of one end of the plug body close to the pins. When the plug is inserted into the socket, the anti-loosening device can abut against the socket. Therefore, the distance from the contour line of the contact surface between the anti-loosening device and the socket to the centroid of the plug is greater than the distance from the contour line of the contact surface between the plug body and the socket to the centroid of the plug. In this way, the new torque point formed by the integration of the plug and the anti-loosening device moves downward compared to the torque point between the plug and the socket. Based on the moment calculation formula M = lf, the position vector from the new torque point of the gravity of the plug remains unchanged, that is, the moment generated by the weight of the plug does not change in magnitude or direction. The position vector from the new torque point of the frictional force between the plug and the socket increases, that is, the moment generated by the frictional force between the plug and the socket increases in magnitude and does not change in direction. In this way, the probability of the plug coming out of the socket is reduced, and the connection stability between the plug and the socket is enhanced.

[0006] In some embodiments of the present application, when the plug is inserted into the socket, the anti-loosening device of the plug abuts against the socket so as to be adsorbed by negative pressure.

[0007] According to the above embodiments, the plug retention device abuts against the socket so as to be adsorbed by negative pressure, the direction of the adsorption force between the retention device and the socket is the same as the direction of the frictional force between the plug and the socket, and a new torque point formed integrally by the plug and the retention device moves downward from the torque point between the plug and the socket. Thereby, the moment generated by the adsorption force prevents the plug from escaping from the socket and increases the moment generated by the frictional force between the plug and the socket. In this way, the connection stability between the retention device and the socket is further improved, and the probability of the plug escaping from the socket is further reduced.

[0008] In some embodiments of the present application, the retention device is generally a suction cup. When the plug is inserted into the socket, the retention device is adsorbed to the socket, or the retention device is an elastic fitting member, has a plurality of adsorption grooves on the surface in contact with the socket, and is adsorbed to the socket by the plurality of adsorption grooves.

[0009] According to the above embodiments, the retention device is generally a suction cup. In this way, when the plug is inserted into the socket, the retention device is directly adsorbed to the socket, strengthening the connection stability between the retention device and the socket, and further reducing the probability of the plug escaping from the socket. The retention device is an elastic fitting member. When the elastic fitting member abuts against and is pressed by the socket, it deforms to discharge the air in the adsorption groove, and further adsorbs the elastic fitting member to the socket, thereby strengthening the connection stability between the retention device and the socket, and further reducing the probability of the plug escaping from the socket.

[0010] In some embodiments of the present application, the retention device is a fitting member fitted on at least the outer peripheral surface of one end of the plug body close to the pin, and An adsorption member connected to the fitting member, which is adsorbed to the socket when the plug is inserted into the socket, and includes an adsorption member that is provided in contact with the socket or at a distance from the socket.

[0011] According to the above embodiment, after the plug is inserted into the socket, the adsorption member is adsorbed to the socket. At this time, the moment generated by the adsorption force between the adsorption member and the socket has the same direction as the frictional force between the plug and the socket, and a new torque point formed by the integration of the plug and the retaining device moves downward from the torque point between the plug and the socket. Thereby, the moment generated by the adsorption force prevents the plug from escaping from the socket and increases the moment generated by the frictional force between the plug and the socket. In this way, the moment generated by the adsorption force between the adsorption member and the socket prevents the plug from escaping from the socket and further reduces the probability of the plug escaping from the socket. After the plug is inserted into the socket and the adsorption member is adsorbed to the socket and the fitting member abuts against the socket, at this time, the moment generated by the adsorption force between the adsorption member and the socket has the same direction as the frictional force between the plug and the socket, and the fitting member increases the distance from the new torque point of the frictional force between the plug and the socket (the distance from the new torque point when the fitting member abuts against the socket to the frictional force between the plug and the socket is larger than when the adsorption member is adsorbed to the socket). In this way, the moment generated by the adsorption force between the adsorption member and the socket prevents the plug from escaping from the socket, and a new torque point formed by the integration of the plug and the retaining device moves downward from the torque point between the plug and the socket. Thereby, the moment generated by the adsorption force prevents the plug from escaping from the socket and increases the moment generated by the frictional force between the plug and the socket, and reduces the probability of the plug escaping from the socket.

[0012] In some embodiments of the present application, the fitting member has a first opposing surface that aligns with the socket, the first opposing surface has a receiving groove, a part of the suction member is provided in the receiving groove, is connected to the groove wall of the receiving groove, and can deform and at least partially retract into the receiving groove when adsorbed to the socket.

[0013] According to the above embodiment, after a receiving groove is formed on the first opposing surface of the fitting member and a part of the suction member is provided in the receiving groove, when the plug is inserted into the socket, the suction member deforms and at least partially contracts into the receiving groove. When a part of the suction member contracts into the receiving groove, a new torque point is formed between the suction member and the socket. When all of the suction member contracts into the receiving groove, the first opposing surface of the fitting member can abut against the socket, and a new torque point is formed between the receiving groove and the socket.

[0014] In some embodiments of the present application, a plurality of suction members are distributed along the circumferential direction of the fitting member. When the fitting member is fitted into the plug body, the plurality of suction members are circumferentially arranged around the pin.

[0015] According to the above embodiment, the connection stability between the anti-loosening device and the socket is enhanced by the plurality of suction members, and the probability of the plug escaping from the socket is further reduced.

[0016] In some embodiments of the present application, the anti-loosening device includes a rigid housing provided in an annular shape, and an elastic liner provided in the rigid housing, capable of elastic deformation, and fitted on the outer peripheral surface of one end of the plug body close to the pin.

[0017] According to the above embodiments, the rigid housing makes it easy for the user to fit the retaining device onto the plug body. The elastic liner makes it easy for the retaining device to fit onto the plug body. After the plug is inserted into the elastic liner, the elastic liner strengthens the frictional force between the retaining device and the plug body by the elastic force due to its own elastic recovery deformation, and further strengthens the connection stability between the retaining device and the plug body. Since the elastic liner can deform to a certain extent, the retaining device can be applied to plug bodies of different sizes, strengthening the applicability of the retaining device.

[0018] In some embodiments of the present application, the fitting member has a first opposing surface that aligns with the socket, and the retaining device has a second opposing surface that abuts against the socket. After the retaining device is fitted onto the plug body, the distance between the first opposing surface and the second opposing surface in the insertion direction of the plug is 0 mm or more and 10 mm or less.

[0019] According to the above embodiments, within this range, even if there is sufficient space for the deformation of the retaining device, when the retaining device is a suction cup or a suction cavity is provided, the air in the suction cup or the suction cavity can be discharged, ensuring that the retaining device can be adsorbed to the socket after deformation, and preventing the second opposing surface from being unable to abut against the socket after the retaining device is deformed.

[0020] In a second aspect, the plug assembly according to the embodiments of the present application includes a plug including a plug body and a pin provided at one end of the plug body, and the above-described retaining device that can be fitted onto at least the outer peripheral surface of one end of the plug body near the pin.

[0021] According to the above embodiments, after the plug is inserted into the socket, the plug and the anti-disconnection device are integrated, and the anti-disconnection device can increase the moment generated by the frictional force between the plug and the socket. Furthermore, the probability of the plug escaping from the socket can be reduced, and the connection stability between the plug and the socket can be enhanced.

[0022] In some embodiments of the present application, one end of the plug body close to the pin has a first position-limiting structure, and the inner surface of the anti-disconnection device has a second position-limiting structure. After the anti-disconnection device is fitted onto the plug body, the first position-limiting structure and the second position-limiting structure limit each other's positions, causing the anti-disconnection device and the plug body to be press-fitted, and the anti-disconnection device can only be detached from the plug body in the plug insertion direction.

[0023] According to the above embodiments, after the plug body is connected to the anti-disconnection device, the first position-limiting structure and the second position-limiting structure limit each other's positions, realizing the positioning of the plug body within the anti-disconnection device. Also, since the anti-disconnection device can only be detached from the plug body in the plug insertion direction, when the user inserts the plug into the socket and applies a thrust to the plug, the plug can transmit the thrust to the anti-disconnection device to abut or adsorb the anti-disconnection device against the socket. When removing the plug, only the plug can be removed, and the anti-disconnection device can be kept connected to the socket at all times, reducing the number of deformations of the anti-disconnection device and extending the service life of the anti-disconnection device.

[0024] Based on the anti-loosening device of the embodiment of the present application, when the plug is inserted into the socket, the plug receives its own gravity, the pins of the plug receive the frictional force of the plug bush in the socket, and at the contact surface between the plug and the socket, the point farthest from the pins and located below the pins becomes the torque point. A moment is generated by the gravity of the plug to try to escape the plug from the socket, and the moment generated by the frictional force between the plug and the socket is in the opposite direction to the moment generated by the plug, preventing the plug from escaping from the socket. The anti-loosening device is fitted on the outer peripheral surface of one end of the plug body close to the pins. When the plug is inserted into the socket, the anti-loosening device can contact the socket. Therefore, the distance from the contour line of the contact surface between the anti-loosening device and the socket to the centroid of the plug is greater than the distance from the contour line of the contact surface between the plug body and the socket to the centroid of the plug. In this way, the new torque point formed by the integration of the plug and the anti-loosening device moves downward compared to the torque point between the plug and the socket. Based on M = lf, the position vector from the new torque point of the gravity of the plug remains unchanged, that is, neither the magnitude nor the direction of the moment generated by the weight of the plug changes. The position vector from the new torque point of the frictional force between the plug and the socket increases, that is, the moment generated by the frictional force between the plug and the socket increases in magnitude and does not change in direction. In this way, the probability of the plug escaping from the socket is reduced, and the connection stability between the plug and the socket is enhanced.

Brief Description of the Drawings

[0025] To more clearly illustrate the technical means in the embodiments or the prior art of the present application, the drawings necessary for the description of the embodiments or the prior art will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0027] To make the object, technical means, and advantages of the present application clearer, the present application will be described in more detail below with reference to the drawings and embodiments. It will be understood that the specific embodiments described in this specification are only for explaining the present application and do not limit the present application.

[0028] In order to solve the above technical problems, as shown in FIGS. 1 to 4, the anti-disengagement device 10 according to the first aspect of the present application strengthens the connection stability between the plug 20 and the socket 30, particularly the wall socket, so that the probability of the plug 20 escaping from the socket 30, particularly the wall socket, can be reduced. In the following embodiments, the case where the socket 30 is a wall socket will be described as an example, but it should be understood that the socket 30 that fits with the plug 20 can be any type of socket 30.

[0029] In the first aspect, as shown in FIGS. 1 to 3, the anti-disengagement device 10 according to the embodiment of the present application is fitted with the plug 20 including the plug body 21 and the pins 22 connected to the plug body 21, and can be fitted on at least the outer peripheral surface of one end of the plug body 21 close to the pins 22. Naturally, the anti-disengagement device 10 may be fitted over the entire outer peripheral surface of the plug body 21. When the plug 20 is inserted into the socket 30, the anti-disengagement device 10 can abut against the socket 30.

[0030] The plug 20 in the embodiment of the present application may be a two-pin plug, a three-pin plug, an ordinary plug, or an explosion-proof plug. The embodiment of the present application does not limit this. If the plug 20 needs to be fitted to any external device, such as a wall socket, it can be applied to the anti-disconnection device 10. For example, when the plug 20 is inserted into the socket 30, the anti-disconnection device 10 abuts against the socket 30, and when the plug 20 is inserted into an electrical device, the anti-disconnection device 10 abuts against the housing of the electrical device, etc. Any of the anti-disconnection devices 10 in the embodiment of the present application can reduce the probability of the plug 20 escaping from the socket 30 or the electrical device.

[0031] Based on the anti-loosening device 10 of the embodiment of the present application, when the plug 20 is inserted into the socket 30, for example, a wall socket, the plug 20 is subject to the action of its own gravity G, and the pins 22 of the plug 20 are subject to the frictional force F of the plug bush in the socket 30. At the contact surface between the plug 20 and the socket 30, the point farthest from the pins 22 and located below the pins 22 becomes the torque point. A moment is generated to try to escape the plug 20 from the socket 30 by the gravity G of the plug 20, and the moment generated by the frictional force F between the plug 20 and the socket 30 is in the opposite direction to the moment generated by the plug 20, preventing the plug 20 from escaping from the socket 30. The anti-loosening device 10 is fitted on the outer peripheral surface of one end of the plug body 21 close to the pins 22. When the plug 20 is inserted into the socket 30, the anti-loosening device 10 can abut against the socket 30. Therefore, the distance from the contour line of the contact surface between the anti-loosening device 10 and the socket 30 to the centroid of the plug 20 is greater than the distance from the contour line of the contact surface between the plug body 21 and the socket 30 to the centroid of the plug 20. In this way, the new torque point formed by the integration of the plug 20 and the anti-loosening device 10 moves downward compared to the torque point between the plug 20 and the socket 30. Based on M = lf (where M is the moment, l is the position vector from the force to the torque point, and f is the direction of the magnitude of the force), the position vector from the new torque point of the gravity of the plug 20 remains unchanged, that is, neither the magnitude nor the direction of the moment generated by the weight of the plug 20 changes. The position vector from the new torque point of the frictional force between the plug 20 and the socket 30 increases, that is, the moment generated by the frictional force between the plug 20 and the socket 30 increases in magnitude and does not change in direction. In this way, the probability of the plug 20 escaping from the socket 30 is reduced, and the connection stability between the plug 20 and the socket 30 is enhanced.Specifically, as shown in FIG. 2, O is the torque point between the plug 20 and the socket 30, O1 is the torque point between the retaining device 10 and the socket 30, d is the position vector from the torque point O1 of the gravity of the socket 30, c is the position vector from the torque point O of the frictional force between the plug 20 and the socket 30, c1 is the position vector from the torque point O1 of the frictional force between the plug 20 and the socket 30, G is the gravity of the plug, and F is the frictional force between the plug and the socket 30. As can be clearly seen, the distances from the torque points O and O1 of the gravity received by the socket 30 are both d, that is, the magnitudes of the moments generated at O and O1 before and after by gravity are the same, c1 is larger than c, that is, after the retaining device 10 is fitted outside the socket 30, the moment generated by the frictional force between the plug 20 and the socket 30 increases. The moment generated by the frictional force F between the plug and the socket 30 is in the opposite direction to the moment generated by the gravity G of the socket 30 itself, and the moment generated by the gravity G of the plug itself has a tendency to rotate the socket 30 counterclockwise (see FIG. 2) around the point O1, that is, the plug has a tendency to escape from the socket 30, and the moment generated by the frictional force F between the plug and the socket 30 has a tendency to rotate the socket 30 clockwise (see FIG. 2) around the point O1, that is, it has a tendency to prevent the plug from escaping from the socket 30. Therefore, the retaining device strengthens the connection stability between the plug 20 and the socket 30.

[0032] In some embodiments of the present application, when the plug 20 is inserted into the socket 30, the retaining device of the plug 20 abuts against the socket 30 so as to be adsorbed by negative pressure.

[0033] According to the above technical means, the retaining device 10 of the plug 20 abuts against the socket 30 so as to be adsorbed by negative pressure. The direction of the adsorption force between the retaining device 10 and the socket 30 is the same as the direction of the frictional force between the plug 20 and the socket 30. Moreover, a new torque point formed by the integration of the plug 20 and the retaining device 10 moves downward from the torque point between the plug 20 and the socket 30. Thereby, the moment generated by the adsorption force prevents the plug 20 from escaping from the socket 30 and increases the moment generated by the frictional force between the plug 20 and the socket 30. In this way, the connection stability between the retaining device 10 and the socket 30 is further improved, and furthermore, the probability of the plug 20 escaping from the socket 30 is further reduced.

[0034] In order to realize that the retaining device 10 is adsorbed by the socket 30, in some embodiments of the present application, the retaining device 10 is an overall suction cup. When the plug 20 is inserted into the socket 30, the retaining device 10 is adsorbed by the socket 30.

[0035] According to the above embodiment, the retaining device 10 is an overall suction cup. In this way, when the plug 20 is inserted into the socket 30, the retaining device 10 is directly adsorbed by the socket 30, strengthening the connection stability between the retaining device 10 and the socket 30, and furthermore, the probability of the plug 20 escaping from the socket 30 can be reduced.

[0036] In order to realize that the retaining device 10 is adsorbed by the socket 30, as shown in FIG. 1, in other embodiments of the present application, the retaining device 10 is an elastic fitting member, and there are a plurality of adsorption grooves 11 on the surface of the retaining device 10 that abuts against the socket 30. The retaining device 10 is adsorbed by the socket 30 through the plurality of adsorption grooves 11.

[0037] According to the above technical means, when the elastic fitting member abuts against and is pressed by the socket 30, it deforms to discharge the air in the suction groove 11, and further adsorbs the elastic fitting member to the socket 30, thereby enhancing the connection stability between the anti-disconnection device 10 and the socket 30, and further reducing the probability of the plug 20 escaping from the socket 30. In the embodiments of the present application, there are no limitations on the shape, size of the elastic fitting member and the suction groove 11, and the material of the elastic fitting member. In some embodiments of the present application, the suction groove 11 may be a cylindrical cavity. In other embodiments of the present application, the suction groove 11 may be a trumpet-shaped cavity. Regarding the material of the elastic fitting member, in some embodiments of the present application, the elastic fitting member is made of rubber. In some other embodiments of the present application, the elastic fitting member is made of silicone rubber.

[0038] To realize the adsorption of the anti-disconnection device 10 to the socket 30, as shown in FIG. 3, in still another embodiment of the present application, the anti-disconnection device 10 includes a fitting member 12 fitted on the outer peripheral surface of at least one end of the plug body 21 close to the pin 22, and a suction member 13. The suction member 13 is connected to the fitting member 12. When the plug 20 is inserted into the socket 30, the suction member 13 is adsorbed to the socket 30, and the fitting member 12 is provided at a distance from the socket 30.

[0039] The fitting member 12 is fitted to the main body of the plug 20 and abuts against the socket 30 when the plug 20 is inserted into the socket 30. In the embodiments of the present application, there are no limitations on the material, shape, size, etc. of the fitting member 12, as long as the fitting member 12 can be fitted to the main body of the plug 20 and abut against the socket 30 when the plug 20 is inserted into the socket 30. Regarding the material of the fitting member 12, in the embodiments of the present application, since the suction member 13 is adsorbed to the socket 30, in some embodiments of the present application, the fitting member 12 is made of a rigid material. In some other embodiments of the present application, the fitting member 12 is partly made of a rigid material and partly made of an elastic material. The suction member 13 is connected to the rigid part of the fitting member 12 so that when an external force is applied to the fitting member 12, the suction member 13 is more likely to deform, that is, the suction member 13 is more likely to be adsorbed by the socket 30.

[0040] The suction member 13 is adsorbed to the socket 30 when the plug 20 is inserted into the socket 30. In some embodiments of the present application, the suction member 13 may be a suction cup. In some other embodiments of the present application, the suction member 13 may be a magnetic attraction device. The magnetic force generated by the magnetic attraction device generates a magnetic attraction force on the magnetic body in the socket 30, or a magnetic body, such as a product made of iron, cobalt, nickel or a magnet, may be provided in the socket 30. The embodiments of the present application do not limit this.

[0041] According to the above embodiment, after the plug 20 is inserted into the socket 30, the adsorption member 13 is adsorbed to the socket 30. At this time, the moment generated by the adsorption force between the adsorption member 13 and the socket 30 has the same direction as the frictional force between the plug 20 and the socket 30, and the new torque point formed by the integration of the plug 20 and the retaining device 10 moves downward from the torque point between the plug 20 and the socket 30. Thereby, the moment generated by the adsorption force prevents the plug 20 from escaping from the socket 30 and increases the moment generated by the frictional force between the plug 20 and the socket 30. In this way, the moment generated by the adsorption force between the adsorption member 13 and the socket 30 prevents the plug 20 from escaping from the socket 30 and further reduces the probability of the plug 20 escaping from the socket 30.

[0042] In another embodiment of the present application, when the plug 20 is inserted into the socket 30, the fitting member 12 abuts against the socket 30. At this time, the moment generated by the adsorption force between the adsorption member 13 and the socket 30 has the same direction as the frictional force between the plug 20 and the socket 30, and the fitting member 12 increases the distance from the frictional force between the plug 20 and the socket 30 to the new torque point (greater than the distance from the frictional force between the plug 20 and the socket 30 to the new torque point when the adsorption member 13 is adsorbed to the socket 30 and the fitting member 12 abuts against the socket 30). In this way, the moment generated by the adsorption force between the adsorption member 13 and the socket 30 prevents the plug 20 from escaping from the socket 30, and the new torque point formed by the integration of the plug 20 and the retaining device 10 moves downward from the torque point between the plug 20 and the socket 30. Thereby, the moment generated by the adsorption force prevents the plug 20 from escaping from the socket 30 and increases the moment generated by the frictional force between the plug 20 and the socket 30, reducing the probability of the plug 20 escaping from the socket 30.

[0043] As shown in FIG. 4, in some embodiments of the present application, the fitting member 12 has a first opposing surface 121 that joins to the socket 30. The first opposing surface 121 has a receiving groove 122. The suction member 13 has a part provided in the receiving groove 122 and is connected to the groove wall of the receiving groove 122. When the suction member 13 is adsorbed to the socket 30, it can deform and at least a part thereof can retract into the receiving groove 122.

[0044] According to the above embodiment, the receiving groove 122 is formed in the first opposing surface 121 of the fitting member 12, and a part of the suction member 13 is provided in the receiving groove 122. When the plug 20 is inserted into the socket 30, the suction member 13 deforms and at least a part thereof contracts into the receiving groove 122. When a part of the suction member 13 contracts into the receiving groove 122, a new torque point is formed between the suction member 13 and the socket 30. When all of the suction member 13 contracts into the receiving groove 122, the first opposing surface 121 of the fitting member 12 can abut against the socket 30, and a new torque point is formed between the receiving groove 122 and the socket 30.

[0045] As shown in FIG. 3, in some embodiments of the present application, the plurality of suction members 13 are distributed along the circumferential direction of the fitting member 12. When the fitting member 12 is fitted into the plug body 21, the plurality of suction members 13 are provided around the pin 22. The plurality of suction members 13 enhance the connection stability between the anti - detachment device 10 and the socket 30 and further reduce the probability of the plug 20 escaping from the socket 30. Specifically, in some embodiments of the present application, the plurality of suction members 13 are evenly distributed along the circumferential direction of the fitting member 12.

[0046] As shown in FIG. 4, in some embodiments of the present application, the anti - detachment device 10 includes a rigid housing 14 provided in an annular shape and an elastic liner 15 provided in the rigid housing, provided in an annular shape and being elastically deformable, and fitted on the outer peripheral surface of one end of the plug body 21 close to the pin 22. It should be understood that the elastic liner 15 may be a plurality of elastic parts provided in contact with and spaced apart from the outer peripheral surface of the main body 21 of the socket 30.

[0047] The rigid housing 14 makes it easier for the user to fit the retaining device 10 onto the plug body 21, that is, it is easier for the user to hold the retaining device 10 and apply an external force to the retaining device 10. In the embodiments of the present application, the material, shape, size, etc. of the rigid housing 14 are not limited. In the case of the material of the rigid housing 14, in order to ensure the safety of the user, in some embodiments of the present application, the rigid housing 14 is made of an insulating material, for example, rigid plastic, rigid silicone rubber or wood material. Regarding the shape of the rigid housing 14, in order to reduce the material of the rigid housing 14, in some embodiments of the present application, the rigid housing 14 includes a smooth portion and an enlarged portion connected to the smooth portion, and the outer diameter of the end portion enlarged along the insertion direction of the plug 20 gradually increases. The size of the rigid housing 14 should be set according to the sizes of the socket 30 and the plug 20.

[0048] Since the elastic liner 15 can be deformed by itself, the retaining device 10 is easily fitted onto the plug body 21. After the plug 20 is inserted into the elastic liner 15, the elastic liner 15 strengthens the frictional force between the retaining device 10 and the plug body 21 by the elastic force generated by its own elastic recovery deformation, and further strengthens the connection stability between the retaining device 10 and the plug body 21. Since the elastic liner 15 can generate a certain amount of deformation by itself, the retaining device 10 can be applied to plug bodies 21 of different sizes, strengthening the applicability of the retaining device 10. In the embodiments of the present application, none of the material, shape, size, etc. of the elastic liner 15 are limited. Regarding the material of the elastic liner 15, in some embodiments of the present application, the elastic liner 15 may be made of silicone rubber, and in other embodiments of the present application, the elastic liner 15 may be made of rubber.

[0049] As shown in FIG. 3, in some embodiments of the present application, the anti-disengagement device 10 has a first opposing surface 121 facing the socket 30, the plug 20 has a second opposing surface 212 facing the socket 30, and after the anti-disengagement device 10 is fitted to the plug body 21, the distance between the first opposing surface 121 and the second opposing surface 212 in the insertion direction of the plug 20 is 0 mm or more and 10 mm or less.

[0050] The first opposing surface 121 (which may of course be the above-mentioned adsorption member 13) increases the distance from the frictional force between the plug 20 and the socket 30 to a new torque point by abutting against the socket 30 when the plug 20 is inserted into the socket 30. When the first opposing surface 121 abuts against the socket 30, the side of the fitting member 12 close to the socket 30 is the first opposing surface 121, and the side of the plug body 21 close to the socket 30 is the second opposing surface 212. When the fitting member 12 is a rigid material, the distance between the first opposing surface 121 and the second opposing surface 212 in the insertion direction of the plug 20 is naturally 0, that is, the first opposing surface 121 and the second opposing surface 212 are flush. Thereby, it is ensured that the first opposing surface 121 abuts against the socket 30 when the plug 20 is inserted into the socket 30. When the fitting member 12 is an elastic material, the distance between the first opposing surface 121 and the second opposing surface 212 in the insertion direction of the plug 20 is greater than 0 mm and 10 mm or less. Thereby, it is ensured that there is sufficient space to generate a sufficient amount of deformation in the fitting member 12.

[0051] In a second aspect, as shown in FIG. 4, the plug 20 assembly according to an embodiment of the present application includes a plug 20 including a plug body 21 and a pin 22 provided at one end of the plug body 21, and the anti-disengagement device 10, and the anti-disengagement device 10 can be fitted to at least the outer peripheral surface of one end of the plug body 21 close to the pin 22.

[0052] According to the above embodiments, after the plug 20 is inserted into the socket 30, the plug 20 and the anti - detachment device 10 are integrated, and the anti - detachment device 10 can increase the moment generated by the frictional force between the plug 20 and the socket 30. Furthermore, the probability of the plug 20 escaping from within the socket 30 is reduced, and the connection stability between the plug 20 and the socket 30 is enhanced.

[0053] As shown in FIG. 4, in some embodiments of the present application, at one end of the plug body 21 close to the pin 22, there is a first position - limiting structure 211, and on the inner surface of the anti - detachment device 10, there is a second position - limiting structure 16. After the anti - detachment device 10 is fitted onto the plug body 21, the first position - limiting structure 211 and the second position - limiting structure 16 limit each other's positions, the anti - detachment device 10 and the plug body 21 are interference - fitted, and the anti - detachment device 10 can only be detached from the plug body 21 in the insertion direction of the plug 20.

[0054] As shown in FIG. 4, in some embodiments of the present application, the first position - limiting structure 211 is an annular first position - limiting surface, and the radial dimension of the first position - limiting surface gradually decreases along the insertion direction of the plug 20. The second position - limiting structure 16 is an annular second position - limiting surface, and the cavity wall of the second position - limiting surface gradually decreases along the insertion direction of the plug 20. That is, the radial dimension of one end of the first position - limiting surface and the second position - limiting surface close to the socket 30 is small, and the radial dimension of one end far from the socket 30 is large. When the plug 20 is inserted into the socket 30, the first position - limiting surface is in close contact with the second position - limiting surface.

[0055] In some other embodiments of the present application, the first position limiting structure 211 is a guide rail, the guide rail is convexly provided on the peripheral wall of the plug body 21, the second position limiting structure 16 is a guide groove, the guide groove is formed in the retaining device 10 corresponding to the guide rail. When the retaining device 10 is an elastic fitting member, the guide groove is formed in the elastic fitting member and communicates with the cavity of the elastic fitting member. When the retaining device 10 is the fitting member 12 and the suction member 13, the guide groove is formed in the fitting member 12 and communicates with the cavity of the fitting member 12. In some embodiments of the present application, the axes of the guide groove and the guide rail are parallel to the insertion direction of the plug 20.

[0056] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar members. In the description of the present application, the orientation or positional relationship represented by terms such as "upper", "lower", "left", "right", etc. is the orientation or positional relationship based on the drawings. It is only for explaining the present application and simplifying the description, and it does not indicate or imply that the device or element mentioned must have a specific orientation and be configured and operated in a specific orientation. It should be understood that the terms for explaining the positional relationship in the drawings are only used for exemplary explanations and should not be understood as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0057] The above are only the preferred embodiments of the present application and do not limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the protection scope of the present application.

Description of Reference Numerals

[0058] 10, Retaining device 11, Suction groove 12, Fitting member 121, First opposing surface 122, Accommodating groove 13, Suction member 14, Rigid housing 15, Elastic liner 16, Second position limiting structure 20. Plug 21. Plug body 211. First position limiting structure 212. Second opposing surface 22. Pin 30. Socket a. Insertion direction of the plug

Claims

1. A plug that fits with a plug including a plug body and pins connected to the plug body, and can be fitted to at least an outer peripheral surface of one end close to the pins of the plug body. When the plug is inserted into an outlet, the anti-disconnection device is characterized in that it can abut against the outlet.

2. The anti-disconnection device of the plug, when the plug is inserted into an outlet, is characterized in that it abuts against the outlet so as to be adsorbed by negative pressure. The anti-disconnection device according to claim 1.

3. The anti-disconnection device is an overall suction cup. When the plug is inserted into an outlet, the anti-disconnection device is adsorbed to the outlet, or The anti-disconnection device is an elastic fitting member, and has a plurality of suction grooves on a surface that abuts against the outlet, and is adsorbed to the outlet by the plurality of suction grooves. The anti-disconnection device according to claim 2.

4. A fitting member fitted to at least an outer peripheral surface of one end close to the pins of the plug body, and A suction member connected to the fitting member, which is adsorbed to the outlet when the plug is inserted into the outlet, and the fitting member abuts against the outlet or is provided at a distance from the outlet. The anti-disconnection device according to claim 2.

5. The fitting member has a first opposing surface that matches the outlet, the first opposing surface has a receiving groove, a part of the suction member is provided in the receiving groove, is connected to a groove wall of the receiving groove, and when adsorbed to the outlet, can be deformed and at least partially retracted into the receiving groove. The anti-disconnection device according to claim 4.

6. The plurality of suction members are distributed along the circumferential direction of the fitting member. When the fitting member is fitted to the plug body, the plurality of suction members are provided around the pins. The anti-disconnection device according to claim 4.

7. A rigid housing provided in an annular shape, and An elastic liner provided in the rigid housing, provided in an annular shape and capable of elastic deformation, and fitted to an outer peripheral surface of one end close to the pins of the plug body. The anti-disconnection device according to claim 1.

8. The anti-disengagement device has a first opposing surface facing the socket, and the plug body has a second opposing surface facing the socket. After the anti-disengagement device is fitted onto the plug body, the distance between the first opposing surface and the second opposing surface in the insertion direction of the plug is 0 mm or more and 10 mm or less. The anti-disengagement device according to any one of claims 1 to 7, characterized in that.

9. A plug including a plug body and a pin provided at one end of the plug body, An anti-disengagement device according to any one of claims 1 to 8, which can be fitted onto at least the outer peripheral surface of one end of the plug body near the pin. A plug assembly, characterized in that it includes.

10. One end of the plug body near the pin has a first position-limiting structure, and the inner surface of the anti-disengagement device has a second position-limiting structure. After the anti-disengagement device is fitted onto the plug body, the first position-limiting structure and the second position-limiting structure limit each other's positions, and the anti-disengagement device and the plug body are interference-fitted, and the anti-disengagement device can only be detached from the plug body along the insertion direction of the plug. The plug assembly according to claim 9, characterized in that.

Images