Plug assembly and system

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 has become increasingly high, and the weight of the corresponding charger plugs has also become increasingly heavy. Even for high-quality wall sockets, when a charger is plugged into the wall socket for charging, there is a risk that the charger body may tilt or fall. In the related technical field, for wall sockets with poor quality or those that have been used for a long time, during charging of the charger, the pins of the charger and the leaf springs of the wall socket are not firmly clamped, resulting in phenomena such as the charger tilting or falling from the wall socket.

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 enhancing 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 a socket, it can abut against the socket.

[0005] According to the retaining device of the embodiment of the present invention, when a plug is inserted into an outlet, the plug is subjected to its own gravity, and the pins of the plug are subjected to the frictional force of the plug bush inside the outlet. The torque point is the point on the contact surface between the plug and the outlet that is furthest from the pins and located below the pins. The gravity of the plug generates a moment that tries to pull the plug out of the outlet, and the moment generated by the frictional force between the plug and the outlet is in the opposite direction to the moment generated by the plug, thus preventing the plug from coming out of the outlet. When the retaining device is fitted onto the outer circumferential surface of one end of the plug body near the pins, and the plug is inserted into an outlet, the retaining device can come into contact with the outlet. As a result, the distance from the contour line of the contact surface between the retaining device and the outlet 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 outlet to the centroid of the plug. Thus, a new torque point formed by the plug and the retaining device working together moves below the torque point between the plug and the outlet. Based on the moment calculation formula M=lf, the position vector of the plug from the new torque point due to gravity remains unchanged; that is, the moment generated by the weight of the plug does not change in either magnitude or direction. The position vector of the frictional force between the plug and the outlet increases from the new torque point; that is, the moment generated by the frictional force between the plug and the outlet increases in magnitude but does not change in direction. In this way, the probability of the plug escaping from the outlet is reduced, and the connection stability between the plug and the outlet is strengthened.

[0006] In some embodiments of the present invention, when the plug is inserted into an outlet, the plug retention device contacts the outlet so as to be attracted by negative pressure.

[0007] According to the above embodiment, the plug retention device contacts the outlet so as to be attracted by negative pressure, and the direction of the attractive force between the retention device and the outlet is the same as the direction of the frictional force between the plug and the outlet. Furthermore, a new torque point formed by the plug and the retention device working together is moved below the torque point between the plug and the outlet. As a result, the moment generated by the attractive force prevents the plug from escaping from the outlet, and increases the moment generated by the frictional force between the plug and the outlet. In this way, the connection stability between the retention device and the outlet is further improved, and the probability of the plug escaping from the outlet is further reduced.

[0008] In some embodiments of the present application, the retaining device is entirely a suction cup, and when the plug is inserted into the outlet, the retaining device is attracted to the outlet, or The retaining device is an elastic fitting member, and has a plurality of suction grooves on its surface that contacts the outlet, and is attracted to the outlet by the plurality of suction grooves.

[0009] According to the above embodiment, the retaining device is entirely a suction cup. In this way, when the plug is inserted into the outlet, the retaining device is directly attracted to the outlet, enhancing the connection stability between the retaining device and the outlet, and further reducing the probability of the plug coming loose from the outlet. The retaining device is an elastic fitting member. When the elastic fitting member comes into contact with the outlet and is pressed, it deforms to expel air from the suction groove, and further suctions the elastic fitting member to the outlet, thereby strengthening the connection stability between the retaining device and the outlet, and further reducing the probability of the plug coming out of the outlet.

[0010] In some embodiments of the present application, the retaining device is A fitting member fitted to the outer circumferential surface of at least one end of the plug body near the pin, The fitting member includes a suction member connected to the fitting member, which, when the plug is inserted into the outlet, is attracted to the outlet, and the fitting member is either in contact with the outlet or provided at a distance from the outlet.

[0011] According to the above embodiment, after the plug is inserted into the outlet, the suction member is attracted to the outlet. At this time, the moment generated by the suction force between the suction member and the outlet is in the same direction as the frictional force between the plug and the outlet, and a new torque point formed by the plug and the retaining device working together moves below the torque point between the plug and the outlet. As a result, the moment generated by the suction force prevents the plug from escaping from the outlet and increases the moment generated by the frictional force between the plug and the outlet. Thus, the moment generated by the suction force between the suction member and the outlet prevents the plug from escaping from the outlet and further reduces the probability of the plug escaping from the outlet. When the plug is inserted into the outlet, and the suction member is attracted to the outlet and the fitting member comes into contact with the outlet, the moment generated by the suction force between the suction member and the outlet is in the same direction as the frictional force between the plug and the outlet. The fitting member increases the distance from the new torque point of the frictional force between the plug and the outlet (the distance from the new torque point when the fitting member comes into contact with the outlet to the frictional force between the plug and the outlet is greater when the fitting member comes into contact with the outlet than when the suction member is attracted to the outlet). In this way, the moment generated by the suction force between the suction member and the outlet prevents the plug from coming out of the outlet, and the new torque point formed by the plug and the retaining device together moves below the torque point between the plug and the outlet. As a result, the moment generated by the suction force prevents the plug from coming out of the outlet, and increases the moment generated by the frictional force between the plug and the outlet, reducing the probability of the plug coming out of the outlet.

[0012] In some embodiments of the present application, the fitting member has a first opposing surface that is in contact with the outlet, the first opposing surface has a housing groove, and the suction member is partially provided in the housing groove and connected to the groove wall of the housing groove, and when suctioned to the outlet, it can deform so that at least a portion of it retracts into the housing groove.

[0013] According to the above embodiment, a accommodating groove is formed on the first opposing surface of the fitting member, and a part of the suction member is placed in the accommodating groove. After the plug is inserted into the outlet, the suction member deforms and at least a part of it contracts into the accommodating groove. When a part of the suction member contracts into the accommodating groove, a new torque point is formed between the suction member and the outlet. When the entire suction member contracts into the accommodating groove, the first opposing surface of the fitting member can contact the outlet, and a new torque point is formed between the accommodating groove and the outlet.

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

[0015] According to the above embodiment, the connection stability between the retaining device and the outlet is enhanced by the use of multiple suction members, further reducing the probability of the plug coming out of the outlet.

[0016] In some embodiments of the present application, the retaining device is A rigid housing arranged in an annular shape, The device includes an elastic liner provided within the rigid housing, which is elastically deformable and fitted onto the outer circumferential surface of one end of the plug body near the pin.

[0017] According to the above embodiment, the rigid housing makes it easier for the user to fit the retaining device onto the plug body, the elastic liner makes it easier for the retaining device to fit onto the plug body, and after the plug is inserted into the elastic liner, the elastic liner strengthens the frictional force between the retaining device and the plug body due to its elastic recovery deformation, further strengthening the connection stability between the retaining device and the plug body, and because the elastic liner can deform to some extent, the retaining device can be applied to plug bodies of different sizes, thereby enhancing the applicability of the retaining device.

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

[0019] According to the above embodiment, even if there is sufficient space for deformation of the retaining device within this range, if the retaining device is a suction cup or has an adsorption cavity, the air inside the suction cup or adsorption cavity can be discharged, ensuring that the retaining device can be adsorbed to the outlet after deformation, and preventing the second opposing surface from contacting the outlet after deformation.

[0020] In a second embodiment, the plug assembly according to the embodiment of the present application is A plug including a plug body and a pin provided at one end of the plug body, The device includes, at least, a retaining device that can be fitted onto the outer circumferential surface of one end of the plug body closest to the pin.

[0021] According to the above embodiments, after the plug is inserted into the socket, the plug and the retaining device are integrated, and the retaining device can increase the moment generated by the frictional force between the plug and the socket. Furthermore, the probability that the plug escapes from the socket can be reduced, and the connection stability between the plug and the socket is 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 retaining device has a second position limiting structure. After the retaining 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 retaining device and the plug body to be in an interference fit, and the retaining device can only be detached from the plug body in the insertion direction of the plug.

[0023] According to the above embodiments, after the plug body is connected to the retaining 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 retaining device. Also, since the retaining device can only be detached from the plug body in the insertion direction of the plug, when the user inserts the plug into the socket and applies a thrust to the plug, the plug can transmit the thrust to the retaining device to abut or adsorb the retaining device against the socket. When removing the plug, only the plug can be removed, and the retaining device can be constantly connected to the socket, reducing the number of deformations of the retaining device and extending the service life of the retaining 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 bears its own gravity, the pins of the plug bear 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 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 larger 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] It is a schematic diagram of the structure in which the anti-loosening device in an embodiment of the present application is fitted on the plug. [Figure 2] This diagram shows the force applied after connection of the retaining device, plug, and outlet of the present invention. [Figure 3] This is a schematic diagram of the retaining device in another embodiment of the present invention. [Figure 4] This is an exploded view of the structure shown in Figure 1 after it has been cut along section A-A. [Modes for carrying out the invention]

[0027] To further clarify the purpose, technical means, and advantages of this application, the application will be described in more detail below with reference to the drawings and embodiments. It will be understood that the specific embodiments described herein are illustrative of the application and not limiting.

[0028] To solve the above technical problems, as shown in Figures 1 to 4, the retaining device 10 according to the first aspect of the present invention can reduce the probability of the plug 20 coming loose from the outlet 30, especially the wall outlet, by strengthening the connection stability between the plug 20 and the outlet 30, especially the wall outlet. In the following embodiments, the case in which the outlet 30 is a wall outlet will be described as an example, but please understand that the outlet 30 that mates with the plug 20 may be any type of outlet 30.

[0029] In the first embodiment, as shown in Figures 1 to 3, the retaining device 10 according to the embodiment of the present application is fitted to a plug 20 which includes a plug body 21 and pins 22 connected to the plug body 21, and can be fitted to at least the outer circumferential surface of one end of the plug body 21 closest to the pins 22, and of course the retaining device 10 may be fitted over the entire outer circumferential surface of the plug body 21, and when the plug 20 is inserted into an outlet 30, the retaining device 10 can come into contact with the outlet 30.

[0030] The plug 20 in the embodiments of the present application may be a 2-pin plug, a 3-pin plug, a standard plug, or an explosion-proof plug. The embodiments of the present application are not limited thereto, and the retaining device 10 can be applied to any external device, such as a wall outlet, that the plug 20 needs to be plugged into. For example, when the plug 20 is inserted into the outlet 30, the retaining device 10 will come into contact with the outlet 30, and when the plug 20 is inserted into an electrical device, the retaining device 10 will come into contact with the housing of the electrical device. In all cases, the retaining device 10 in the embodiments of the present application can reduce the probability of the plug 20 coming loose from the outlet 30 or the electrical device.

[0031] Based on the retaining device 10 of the embodiment of the present invention, when the plug 20 is inserted into an outlet 30, for example, a wall outlet, the plug 20 is subjected to its own gravity G, and the pins 22 of the plug 20 are subjected to the frictional force F of the plug bush inside the outlet 30. The torque point is the point on the contact surface between the plug 20 and the outlet 30 that is furthest from the pins 22 and located below the pins 22. The gravity G of the plug 20 generates a moment that attempts to pull the plug 20 out of the outlet 30, and the moment generated by the frictional force F between the plug 20 and the outlet 30 is in the opposite direction to the moment generated by the plug 20, thus preventing the plug 20 from escaping from the outlet 30. When the retaining device 10 is fitted onto the outer circumferential surface of one end of the plug body 21 closest to the pin 22, and the plug 20 is inserted into the outlet 30, the retaining device 10 can come into contact with the outlet 30. As a result, the distance from the contour line of the contact surface between the retaining device 10 and the outlet 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 outlet 30 to the centroid of the plug 20. Thus, a new torque point formed by the plug 20 and the retaining device 10 working together moves below the torque point between the plug 20 and the outlet 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 force's magnitude), the position vector of the gravitational force of the plug 20 from the new torque point remains unchanged, meaning that the magnitude and direction of the moment generated by the weight of the plug 20 do not change. The position vector of the frictional force between the plug 20 and the outlet 30 from the new torque point increases, meaning that the moment generated by the frictional force between the plug 20 and the outlet 30 increases in magnitude but does not change in direction. In this way, the probability of the plug 20 escaping from the outlet 30 is reduced, and the connection stability between the plug 20 and the outlet 30 is strengthened.Specifically, as shown in Figure 2, O is the torque point between the plug 20 and the outlet 30, O1 is the torque point between the retaining device 10 and the outlet 30, d is the position vector of gravity on the outlet 30 from the torque point O1, c is the position vector of the frictional force between the plug 20 and the outlet 30 from the torque point O, c1 is the position vector of the frictional force between the plug 20 and the outlet 30 from the torque point O1, G is the gravity on the plug, and F is the frictional force between the plug and the outlet 30. It is clear that the distance of gravity acting on the outlet 30 from the torque points O and O1 is both d, meaning that the magnitude of the moments generated at O ​​and O1 due to gravity is the same, and c1 is greater than c, meaning that after the retaining device 10 is fitted outside the outlet 30, the moment generated by the frictional force between the plug 20 and the outlet 30 increases. The moment generated by the frictional force F between the plug and the outlet 30 is in the opposite direction to the moment generated by the gravity G of the outlet 30 itself. The moment generated by the gravity G of the plug itself tends to rotate the outlet 30 counterclockwise around point O1 (see Figure 2), meaning the plug tends to detach from the outlet 30. The moment generated by the frictional force F between the plug and the outlet 30 tends to rotate the outlet 30 clockwise around point O1 (see Figure 2), meaning it tends to prevent the plug from detaching from the outlet 30. Therefore, the retaining device enhances the connection stability between the plug 20 and the outlet 30.

[0032] In some embodiments of the present invention, when the plug 20 is inserted into the outlet 30, the retaining device for the plug 20 contacts the outlet 30 so as to be attracted by negative pressure.

[0033] According to the above technical means, the plug retaining device 10 for the plug 20 contacts the outlet 30 so as to be attracted by negative pressure, and the direction of the attractive force between the retaining device 10 and the outlet 30 is the same as the direction of the frictional force between the plug 20 and the outlet 30. Furthermore, a new torque point formed by the plug 20 and the retaining device 10 working together is moved below the torque point between the plug 20 and the outlet 30. As a result, the moment generated by the attractive force prevents the plug 20 from escaping from the outlet 30 and increases the moment generated by the frictional force between the plug 20 and the outlet 30. In this way, the connection stability between the retaining device 10 and the outlet 30 is further improved, and the probability of the plug 20 escaping from the outlet 30 is further reduced.

[0034] In order to ensure that the retaining device 10 is attracted to the outlet 30, in some embodiments of the present invention, the retaining device 10 is entirely a suction cup, and when the plug 20 is inserted into the outlet 30, the retaining device 10 is attracted to the outlet 30.

[0035] According to the above embodiment, the retaining device 10 is entirely a suction cup, and in this way, when the plug 20 is inserted into the outlet 30, the retaining device 10 is directly attracted to the outlet 30, thereby strengthening the connection stability between the retaining device 10 and the outlet 30, and further reducing the probability of the plug 20 coming out of the outlet 30.

[0036] In order to ensure that the retaining device 10 is attracted to the outlet 30, as shown in Figure 1, in another embodiment of the present invention, the retaining device 10 is an elastic fitting member, and there are a plurality of suction grooves 11 on the surface of the retaining device 10 that contacts the outlet 30, and the retaining device 10 is attracted to the outlet 30 by the plurality of suction grooves 11.

[0037] According to the above technical means, when the elastic fitting member comes into contact with and is pressed against the outlet 30, it deforms to expel the air in the suction groove 11, and further suction the elastic fitting member to the outlet 30, thereby strengthening the connection stability between the retaining device 10 and the outlet 30, and further reducing the probability of the plug 20 coming out of the outlet 30. In the embodiments of the present application, the shape, size, and material of the elastic fitting member and the suction groove 11 are not limited, and in some embodiments of the present application, the suction groove 11 may be a cylindrical cavity, and in other embodiments of the present application, the suction groove 11 may be a trumpet-shaped cavity, and regarding the material of the elastic fitting member, in some embodiments of the present application, the elastic fitting member is made of rubber, and in some other embodiments of the present application, the elastic fitting member is made of silicone rubber.

[0038] In order to ensure that the retaining device 10 is attracted to the outlet 30, as shown in Figure 3, in yet another embodiment of the present invention, the retaining device 10 includes a fitting member 12 fitted to the outer circumferential surface of at least one end of the plug body 21 near the pins 22, and an adsorption member 13, wherein the adsorption member 13 is connected to the fitting member 12, and when the plug 20 is inserted into the outlet 30, the adsorption member 13 is attracted to the outlet 30, and the fitting member 12 is provided at a distance from the outlet 30.

[0039] The fitting member 12 is fitted onto the plug body 20 and contacts the outlet 30 when the plug 20 is inserted into the outlet 30. In the embodiments of this application, there are no limitations on the material, shape, and size of the fitting member 12, as long as the fitting member 12 can be fitted onto the plug body 20 and contacts the outlet 30 when the plug 20 is inserted into the outlet 30. Regarding the material of the fitting member 12, in the embodiments of this application, since the suction member 13 is attracted to the outlet 30, in some embodiments of this application the fitting member 12 is made of a rigid material, and in some other embodiments of this application the fitting member 12 is made of a rigid material in part and an elastic material in part, and the suction member 13 is connected to the rigid part of the fitting member 12 so that the suction member 13 is more easily deformed when an external force is applied to the fitting member 12, that is, so that the suction member 13 is more easily attracted to the outlet 30.

[0040] The suction member 13 is attracted to the outlet 30 when the plug 20 is inserted into the outlet 30. In some embodiments of the present application, the suction member 13 may be a suction cup, and 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 material inside the outlet 30, or a magnetic material, such as iron, cobalt, nickel products, or a magnet, may be provided inside the outlet 30, and the embodiments of the present application are not limited thereto.

[0041] According to the above embodiment, after the plug 20 is inserted into the outlet 30, the suction member 13 is attracted to the outlet 30. At this time, the moment generated by the suction force between the suction member 13 and the outlet 30 is in the same direction as the frictional force between the plug 20 and the outlet 30. Furthermore, the new torque point formed by the plug 20 and the retaining device 10 working together moves below the torque point between the plug 20 and the outlet 30. As a result, the moment generated by the suction force prevents the plug 20 from escaping from the outlet 30 and increases the moment generated by the frictional force between the plug 20 and the outlet 30. Thus, the moment generated by the suction force between the suction member 13 and the outlet 30 prevents the plug 20 from escaping from the outlet 30 and further reduces the probability of the plug 20 escaping from the outlet 30.

[0042] In another embodiment of the present invention, when the plug 20 is inserted into the outlet 30, the fitting member 12 comes into contact with the outlet 30. At this time, the moment generated by the suction force between the suction member 13 and the outlet 30 is in the same direction as the frictional force between the plug 20 and the outlet 30. The fitting member 12 increases the distance from the frictional force between the plug 20 and the outlet 30 to the new torque point (to a greater distance than the distance from the frictional force between the plug 20 and the outlet 30 at the new torque point when the suction member 13 is attracted to the outlet 30 and the fitting member 12 comes into contact with the outlet 30). In this way, the moment generated by the suction force between the suction member 13 and the outlet 30 prevents the plug 20 from escaping from the outlet 30, and the new torque point formed by the plug 20 and the retaining device 10 working together moves below the torque point between the plug 20 and the outlet 30. As a result, the moment generated by the suction force prevents the plug 20 from escaping from the outlet 30, and also increases the moment generated by the frictional force between the plug 20 and the outlet 30, reducing the probability that the plug 20 will escaping from the outlet 30.

[0043] As shown in Figure 4, in some embodiments of the present invention, the fitting member 12 has a first opposing surface 121 that joins to the outlet 30, the first opposing surface 121 has a housing groove 122, and a portion of the suction member 13 is provided in the housing groove 122 and connected to the groove wall of the housing groove 122, and when the suction member 13 is attracted to the outlet 30, it deforms so that at least a portion of it can be retracted into the housing groove 122.

[0044] According to the above embodiment, a housing groove 122 is formed on the first opposing surface 121 of the fitting member 12, a part of the suction member 13 is provided in the housing groove 122, and when the plug 20 is inserted into the outlet 30, the suction member 13 deforms and at least a part of it contracts into the housing groove 122. When a part of the suction member 13 contracts into the housing groove 122, a new torque point is formed between the suction member 13 and the outlet 30. When the entire suction member 13 contracts into the housing groove 122, the first opposing surface 121 of the fitting member 12 can come into contact with the outlet 30, and a new torque point is formed between the housing groove 122 and the outlet 30.

[0045] As shown in Figure 3, in some embodiments of the present invention, the multiple suction members 13 are distributed along the circumferential direction of the fitting member 12, and when the fitting member 12 is fitted into the plug body 21, the multiple suction members 13 are arranged around the pin 22. The multiple suction members 13 enhance the connection stability between the retaining device 10 and the outlet 30, further reducing the probability of the plug 20 coming out of the outlet 30. Specifically, in some embodiments of the present invention, the multiple suction members 13 are distributed at equal intervals along the circumferential direction of the fitting member 12.

[0046] As shown in Figure 4, in some embodiments of the present invention, the retaining device 10 includes an annular rigid housing 14 and an elastic liner 15 provided within the rigid housing, which is annular, elastically deformable, and fitted onto the outer circumferential surface of one end of the plug body 21 closest to the pins 22. It should be understood that the elastic liner 15 may be a plurality of spaced elastic parts that contact the outer circumferential surface of the body 21 of the outlet 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, makes it easier for the user to take the retaining device 10 and apply external force to it. The material, shape, and size of the rigid housing 14 are not limited in the embodiments of this application. Regarding the material of the rigid housing 14, in order to ensure user safety, in some embodiments of this application the rigid housing 14 is made of an insulating material, such as 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 this application the rigid housing 14 includes a smooth portion and an enlarged portion connected to the smooth portion, with the outer diameter of the enlarged end gradually increasing along the insertion direction of the plug 20, and the size of the rigid housing 14 should be set to match the size of the outlet 30 and the plug 20.

[0048] Because the elastic liner 15 is deformable, the retaining device 10 can be easily fitted into 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, further strengthening the connection stability between the retaining device 10 and the plug body 21. Because the elastic liner 15 can undergo a certain deformation, the retaining device 10 can be applied to plug bodies 21 of different sizes, thereby enhancing the applicability of the retaining device 10. In the embodiments of this application, the material, shape, and size of the elastic liner 15 are not limited. Regarding the material of the elastic liner 15, in some embodiments of this application, the elastic liner 15 may be made of silicone rubber, and in other embodiments of this application, the elastic liner 15 may be made of rubber.

[0049] As shown in Figure 3, in some embodiments of the present invention, the retaining device 10 has a first opposing surface 121 facing the outlet 30, and the plug 20 has a second opposing surface 212 facing the outlet 30. After the retaining device 10 is fitted into 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 also be the suction member 13) contacts the outlet 30 when the plug 20 is inserted into the outlet 30, thereby increasing the distance from the frictional force between the plug 20 and the outlet 30 to a new torque point. When the first opposing surface 121 contacts the outlet 30, the side of the fitting member 12 closer to the outlet 30 is the first opposing surface 121, and the side of the plug body 21 closer to the outlet 30 is the second opposing surface 212. If the fitting member 12 is made of a rigid material, the first opposing surface in the insertion direction of the plug 20... The distance between the facing surface 121 and the second opposing surface 212 is naturally 0, that is, the first opposing surface 121 and the second opposing surface 212 are flush, thereby ensuring that the first opposing surface 121 contacts the outlet 30 when the plug 20 is inserted into the outlet 30. If the fitting member 12 is made of 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 ensuring that there is sufficient space to generate a sufficient amount of deformation in the fitting member 12.

[0051] In a second embodiment, as shown in Figure 4, the plug 20 assembly according to the 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 retaining device 10, wherein the retaining device 10 can be fitted to at least the outer circumferential surface of one end of the plug body 21 closest to the pin 22.

[0052] According to the above embodiment, after the plug 20 is inserted into the outlet 30, the plug 20 and the retaining device 10 become one unit, and the retaining device 10 can increase the moment generated by the frictional force between the plug 20 and the outlet 30, further reducing the probability of the plug 20 coming out of the outlet 30 and strengthening the connection stability between the plug 20 and the outlet 30.

[0053] As shown in Figure 4, in some embodiments of the present invention, a first position limiting structure 211 is provided at one end of the plug body 21 near the pin 22, and a second position limiting structure 16 is provided on the inner surface of the retaining device 10. After the retaining device 10 is fitted into the plug body 21, the first position limiting structure 211 and the second position limiting structure 16 are mutually restricted in position, the retaining device 10 and the plug body 21 are tightly fitted together, and the retaining device 10 can only be detached from the plug body 21 in the insertion direction of the plug 20.

[0054] As shown in Figure 4, in some embodiments of the present invention, the first position limiting structure 211 is an annular first position limiting surface, the radial dimension of the first position limiting surface gradually decreases along the insertion direction of the plug 20, and the second position limiting structure 16 is an annular second position limiting surface, the cavity wall of the second position limiting surface gradually decreases along the insertion direction of the plug 20. That is, the first and second position limiting surfaces have a smaller radial dimension at one end closer to the outlet 30 and a larger radial dimension at the other end further from the outlet 30, and when the plug 20 is inserted into the outlet 30, the first position limiting surface comes into 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, which is a protrusion on the circumferential wall of the plug body 21; the second position limiting structure 16 is a guide groove, which 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 a fitting member 12 and a suction member 13, the guide groove is formed in the fitting member 12 and communicates with the cavity of the fitting member 12; and 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 components. In this description, directions or positional relationships expressed by terms such as "up," "down," "left," and "right" are directions or positional relationships based on the illustrations and are merely for the purpose of describing this application and simplifying the description. It should be understood that these do not indicate or suggest that the devices or elements mentioned have a specific direction, or that they must be configured and operated in a specific direction. Therefore, the terms used in the drawings to describe positional relationships are merely illustrative and should not be understood as limiting this patent. A person skilled in the art will be able to understand the specific meaning of these terms depending on the specific situation.

[0057] The foregoing are merely preferred embodiments of the present application and do not limit it. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should all be included within the scope of protection. [Explanation of symbols]

[0058] 10. Retaining device 11, Suction groove 12. Fitting member 121, First opposing surface 122, storage groove 13. Adsorption member 14. Hard 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. Outlet a. Direction of plug insertion

Claims

1. It is a plug assembly, A plug comprising a plug body and a pin positioned at one end of the plug body, A suction cup is attached in a sleeve-like manner to surround the outer circumference of the end of the plug body, A plug assembly equipped with the following features.

2. The plug assembly according to claim 1, wherein the suction cup is configured to contact the socket when the plug is inserted into the socket.

3. The suction cup has a first surface on the side opposite to the socket, The plug has a second surface on the opposite side of the socket, The plug assembly according to claim 2, wherein the distance between the first surface and the second surface in the insertion direction of the plug is 0 mm or more and 10 mm or less.

4. The plug assembly according to claim 1, wherein the suction cup comprises an adsorption cavity.

5. The plug assembly according to claim 2, wherein when the plug is inserted into the socket, the suction cup is configured to contact the socket by negative pressure suction.

6. The plug assembly according to claim 1, wherein the suction cup is a magnetic suction cup.

7. It is a plug assembly, A plug comprising a plug body and a pin positioned at one end of the plug body, An elastic sleeve on the circumferential surface of the end of the plug body, wherein the elastic sleeve has a plurality of suction grooves, Suction device and A plug assembly equipped with the following features.

8. The plug assembly according to claim 7, wherein the elastic sleeve is configured to contact the socket when the plug is inserted into the socket.

9. The plug assembly according to claim 8, wherein the elastic sleeve is provided with a housing groove, and the suction device is partially disposed within the housing groove.

10. The plug assembly according to claim 9, wherein the suction device is configured to deform when attracted to the socket and to be drawn at least partially into the housing groove.

11. The plug assembly according to claim 8, further comprising a plurality of suction devices distributed along the circumference of the elastic sleeve.

12. The elastic sleeve is A ring-shaped arrangement of hard shells, An elastic lining is arranged in a ring shape inside the hard shell and attached in a sleeve shape to the circumferential surface of the end of the plug body near the pin, The plug assembly according to claim 8, comprising:

13. It is a system, A plug comprising a plug body and a pin positioned at one end of the plug body, Socket and, A device is provided which is attached in a sleeve-like manner to surround the outer circumference of the end of the plug body, and which is configured to be attached to the socket when the plug is inserted into the socket, A system that includes these features.

14. The system according to claim 13, wherein the device comprises a suction cup.

15. The system according to claim 14, wherein the device comprises a sleeve spaced apart from the suction cup.

16. The system according to claim 14, wherein the suction cup is made of an elastic material.

17. The system according to claim 15, wherein the sleeve is provided with a plurality of suction grooves.

18. The system according to claim 15, wherein the apparatus comprises a plurality of suction devices distributed along the circumference of the sleeve.

19. The aforementioned device is A ring-shaped arrangement of hard shells, An elastic lining is arranged in a ring shape inside the hard shell and attached in a sleeve shape to the circumferential surface of the end of the plug body near the pin, The system according to claim 13, comprising:

20. The system according to claim 15, wherein the sleeve is made of rubber or silicone.

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