A plug-in device for power supply

Abstract

The present invention relates to the technical field of power supply plug-in, and discloses a power supply plug-in device, including a first seal installed on the outer wall of a first joint, a second seal installed on the outer wall of a second joint, and after the first joint and the second joint are limitedly connected, the first seal and the second seal are tightly attached to each other for sealing. The present invention arranges the first seal and the second seal, and when the first joint and the second joint are plugged into each other, the second sealing ring is plugged into the interior of the inner cavity, and the tension of the first spring props up the first sealing ring, so that the groove of the first sealing ring and the convex ring of the second sealing ring fit tightly to each other, and when the outer ring of the second groove ring cavity is plugged into the interior of the outer cavity, the annular rubber wraps the outer ring wall of the second groove ring cavity, and the second groove ring cavity squeezes the annular rubber, and the outer walls of the two fit tightly to each other, thereby achieving better sealing.

Description

Technical Field

[0001] The invention relates to the technical field of power supply plugging equipment, in particular to a power supply plugging device. Background Art

[0002] A power plug device is a mechanical device used to connect a power source and an electrical device, which allows electrical energy to be transferred from the power source to the device and ensures the safety and reliability of the electrical connection. This device usually includes a plug and a socket, which realize electrical connection through physical connection and may contain additional functions for protecting the circuit, indicating the connection status or providing a mechanical locking mechanism.

[0003] Chinese Patent: The application number is CN202010966869.7, which discloses a plug-in device for power supply, including a first connector and a second connector, a fixing part is installed in the first connector, a mounting groove is opened on the inner wall of the first connector, a first spring and a first connector are installed inside the mounting groove, one end of the first spring is fixedly installed on the inner wall of the mounting groove, and the other end is fixed on the first connector, and a plug-in part, a connecting mechanism and a pushing mechanism are installed inside the second connector. The connection between the first connector and the second connector of the present invention ensures normal power supply, the setting of the first spring can ensure that the first connector and the second connector are always in a connected state, the cooperation between the plug-in part and the fixing part ensures the stability of the device, so that the electrical appliance is always in a powered-on state, ensuring the safety of household appliances, and the setting of the second connector and the pushing mechanism facilitates the separation of the first connector and the second connector, and facilitates power off, which greatly ensures the safety of electricity use;

[0004] Although such a setting ensures the stability of the device, so that the electrical appliance is always powered on, ensuring the safety of household appliances, and the setting of the second connecting piece and the pushing mechanism makes it convenient to separate the first connector and the second connector, and convenient to cut off the power, which greatly ensures the safety of electricity use, but the above-mentioned setting does not provide a corresponding sealing structure for the connection between the first connector and the second connector. Considering the environmental adaptability of the power supply plug device, there may be a certain gap at the connection between the first connector and the second connector. External dust and water flow may penetrate into the interior of the connection between the first connector and the second connector through the gap to a certain extent, thereby causing hidden dangers to the plugging of the first connector and the second connector. Summary of the invention

[0005] The object of the present invention is to provide a plug device for power supply to solve the problems raised in the above background technology.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a plug-in device for power supply, comprising a first connector and a second connector, the first connector and the second connector are plugged into each other, a T-shaped cross-section column is installed on the inner wall of the first connector, a first stopper is installed on the top of the T-shaped cross-section column, and two second stoppers are installed on one end of the second connector close to the first connector;

[0008] The first limiting member of the first joint and the second limiting member of the second joint are mutually limited and matched;

[0009] A plurality of fourth springs are installed on the inner wall of the first joint, and a movable ring is installed at one end of the fourth spring away from the first joint. The movable ring is slidably connected to the inner wall of the first joint. When the first joint is not connected to the second joint, the movable ring closes the port of the first joint;

[0010] A first sealing member is installed on the outer wall of the first joint, and a second sealing member is installed on the outer wall of the second joint. After the first joint and the second joint are connected in a limited position, the first sealing member and the second sealing member are tightly attached to each other for sealing.

[0011] In this embodiment, the purpose of the above arrangement is that when the first connector and the second connector are plugged in, the middle of the first connector and the middle of the second connector are aligned, the first limiter pushes the two second limiters, and after the head of the first limiter passes through the two second limiters, the two second limiters are reset, and the movable ring is pushed by the tension of the fourth spring, so that the second connector is limited by the movable ring and the head of the first limiter;

[0012] The second seal is inserted into the interior of the first seal, and the second seal pushes and squeezes the interior of the first seal, so that the first seal and the second seal are pressed and fitted against each other, thereby filling and sealing the connection gap between the first joint and the second joint, and achieving a dustproof and waterproof sealing effect after the first joint and the second joint are plugged in;

[0013] When the first connector is not connected to the second connector, the movable ring closes the port of the first connector. A circular hole is provided in the middle of the movable ring, and the diameter of the circular hole is equal to the diameter of the ring body in the first limiting member, so that the port of the first connector can be closed and the interior of the first connector can be protected when not in use.

[0014] Further, the first position-limiting member comprises a vertical rod, a sliding groove is formed on the outer wall of the vertical rod, a sliding ring is slidably connected to the sliding groove of the vertical rod, a ring body is installed at one end of the vertical rod, the vertical rod sliding groove extends to the inside of the ring body, a second spring is connected between the outer wall of the sliding ring and the ring body, and the second spring is inside the vertical rod sliding groove;

[0015] The edges of the sliding ring and the ring body are both provided with chamfers.

[0016] In this embodiment, the purpose of the above-mentioned setting is that the second spring props up the sliding ring, maintains a distance between the sliding ring and the ring body, and is used to reset the sliding ring. The edges of the sliding ring and the ring body are both chamfered to fit with the inclined surface set at the bottom of the limit rod.

[0017] Further, the second limit member includes a limit rod, a movable groove is provided at the port of the second joint near the first joint, the limit rod passes through the movable groove of the second joint and extends to the outside and is slidably connected, a third spring is installed between the bottom of the limit rod and the inner wall of the movable groove, and the bottom of the limit rod is set as an inclined surface, which is respectively matched with the chamfered edges of the sliding ring and the ring body.

[0018] In this embodiment, the purpose of the above-mentioned setting is that when the chamfered edges of the ring body squeeze and push the inclined surface of the limit rod, the limit rod moves toward the outside of the second joint and squeezes the third spring, and at the same time the second joint pushes the outer wall of the movable ring, and the movable ring squeezes the fourth spring. After the ring body passes through the two limit rods, the tension of the third spring props up the limit rod, and the ring body blocks the return path of the two limit rods. At the same time, the tension of the fourth spring props up the movable ring, keeps the limit of the second joint taut, and prevents the second joint from loosening when inserted.

[0019] Further, the first sealing member includes a first groove ring cavity, the first groove ring cavity is installed on the outer wall of the first joint, the first groove ring cavity is provided with an inner cavity and an outer cavity, a first spring is installed inside the inner cavity, a first sealing ring is slidably connected to the inner wall of the inner cavity, the first sealing ring is connected to the first spring, and a groove is provided on the outer wall of the first sealing ring.

[0020] In this embodiment, the purpose of the above arrangement is that the tension of the first spring props up the first sealing ring so that the groove of the first sealing ring and the convex ring of the second sealing ring fit closely to each other.

[0021] Further, the second sealing member includes a second groove ring cavity, the second groove ring cavity is installed on the outer wall of the second joint, a second sealing ring is installed on the inner wall of the second groove ring cavity, the second sealing ring extends to the port of the second groove ring cavity, a convex ring is installed on the outer wall of the second sealing ring, and the convex ring of the second sealing ring fits with the groove of the first sealing ring.

[0022] In this embodiment, the purpose of the above-mentioned setting is that when the first joint and the second joint are plugged into each other, the second sealing ring is plugged into the inner cavity, and the tension of the first spring props up the first sealing ring, so that the groove of the first sealing ring and the convex ring of the second sealing ring fit tightly against each other.

[0023] Furthermore, an annular rubber is installed on the inner wall of the outer cavity, the outer ring of the second groove ring cavity is inserted into the inner part of the outer cavity, and the annular rubber wraps the outer ring wall of the second groove ring cavity.

[0024] In this embodiment, the purpose of the above-mentioned setting is that when the first joint and the second joint are plugged into each other, the second sealing ring is plugged into the interior of the inner cavity, and the annular rubber is inclined against the interior of the outer cavity. When the outer ring of the second groove ring cavity is plugged into the interior of the outer cavity, the annular rubber wraps the outer ring wall of the second groove ring cavity, and the second groove ring cavity squeezes the annular rubber, and the outer walls of the two fit tightly against each other, thereby achieving better sealing.

[0025] Furthermore, a through hole is provided inside the second joint, the first limiting member is inserted into the through hole, and the chamfered edges of the ring body push the limiting rod.

[0026] In this embodiment, the purpose of the above-mentioned setting is that when the chamfered edges of the ring body squeeze and push the inclined surface of the limit rod, the limit rod moves toward the outside of the second joint and squeezes the third spring, and at the same time the second joint pushes the outer wall of the movable ring, and the movable ring squeezes the fourth spring. After the ring body passes through the two limit rods, the tension of the third spring props up the limit rod, and the two limit rods block the return path of the ring body.

[0027] The present invention has the following beneficial effects:

[0028] (1) The present invention provides a first sealing member and a second sealing member. When the first joint and the second joint are plugged into each other, the second sealing ring is plugged into the interior of the inner cavity. The tension of the first spring props up the first sealing ring, so that the groove of the first sealing ring and the convex ring of the second sealing ring fit closely to each other. When the first joint and the second joint are plugged into each other, the second sealing ring is plugged into the interior of the inner cavity. The annular rubber is inclined toward the interior of the outer cavity. When the outer ring of the second groove ring cavity is plugged into the interior of the outer cavity, the annular rubber wraps the outer ring wall of the second groove ring cavity. The second groove ring cavity squeezes the annular rubber. The outer walls of the two fit closely to each other, thereby achieving better sealing. This solves the problem that there may be a certain gap at the connection between the first joint and the second joint. External dust and water flow may penetrate into the interior of the connection between the first joint and the second joint through the gap to a certain extent, thereby causing hidden dangers to the plugging of the first joint and the second joint.

[0029] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a cross-sectional view of the overall internal structure of the present invention;

[0033] Figure 3 It is a cross-sectional view of the first joint structure of the present invention;

[0034] Figure 4 It is a cross-sectional view of the first joint and the second joint structure of the present invention;

[0035] Figure 5 For the present invention Figure 4 The structural diagram at A in the middle;

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] In the figure: 1. first joint; 10. first sealing member; 101. first groove ring cavity; 102. annular rubber; 103. first spring; 104. first sealing ring; 11. first limiting member; 111. vertical rod; 112. sliding ring; 113. second spring; 114. ring body; 2. second joint; 20. second sealing member; 201. second groove ring cavity; 202. second sealing ring; 21. second limiting member; 211. limiting rod; 212. third spring; 3. fourth spring; 4. movable ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention is a plug-in device for power supply, such as Figure 1 - Figure 5 As shown, it includes a first connector 1 and a second connector 2, the first connector 1 and the second connector 2 are plugged into each other, a T-shaped cross-section column is installed on the inner wall of the first connector 1, a first stopper 11 is installed on the top of the T-shaped cross-section column, and two second stoppers 21 are installed at one end of the second connector 2 close to the first connector 1;

[0040] The first limiting member 11 of the first joint 1 and the second limiting member 21 of the second joint 2 are mutually limited and matched;

[0041] A plurality of fourth springs 3 are installed on the inner wall of the first joint 1, and a movable ring 4 is installed at one end of the fourth spring 3 away from the first joint 1. The movable ring 4 is slidably connected to the inner wall of the first joint 1. When the first joint 1 is not connected to the second joint 2, the movable ring 4 closes the port of the first joint 1;

[0042] A first seal 10 is installed on the outer wall of the first joint 1, and a second seal 20 is installed on the outer wall of the second joint 2. After the first joint 1 and the second joint 2 are connected in a limited position, the first seal 10 and the second seal 20 are tightly attached to each other for sealing.

[0043] In this embodiment, the purpose of the above arrangement is that when the first connector 1 and the second connector 2 are plugged in, the middle of the first connector 1 and the middle of the second connector 2 are aligned, the first stopper 11 pushes the two second stoppers 21, and after the head of the first stopper 11 passes through the two second stoppers 21, the two second stoppers 21 are reset, and the movable ring 4 is pushed by the tension of the fourth spring 3, so that the second connector 2 is limited by the movable ring 4 and the head of the first stopper 11;

[0044] The second seal 20 is inserted into the interior of the first seal 10, and the second seal 20 pushes and squeezes the interior of the first seal 10, so that the first seal 10 and the second seal 20 are pressed and fitted against each other, thereby filling and sealing the connection gap between the first joint 1 and the second joint 2, and achieving a dustproof and waterproof sealing effect after the first joint 1 and the second joint 2 are plugged in;

[0045] When the first joint 1 is not connected to the second joint 2, the movable ring 4 closes the port of the first joint 1. A circular hole is provided in the middle of the movable ring 4. The diameter of the circular hole is equal to the diameter of the ring body 114 in the first stopper 11 (combined with Figure 4 ), so that the port of the first connector 1 can be closed and the interior of the first connector 1 can be protected when not in use.

[0046] As an implementation method, Figure 3 As shown, further:

[0047] The first position-limiting member 11 comprises a vertical rod 111, a sliding groove is formed on the outer wall of the vertical rod 111, a sliding ring 112 is slidably connected to the sliding groove of the vertical rod 111, a ring body 114 is installed at one end of the vertical rod 111, the sliding groove of the vertical rod 111 extends to the inside of the ring body 114, a second spring 113 is connected between the outer wall of the sliding ring 112 and the ring body 114, and the second spring 113 is inside the sliding groove of the vertical rod 111;

[0048] The edges of the sliding ring 112 and the ring body 114 are both provided with chamfers.

[0049] In this embodiment, the purpose of the above-mentioned setting is that the second spring 113 props up the sliding ring 112, maintains a distance between the sliding ring 112 and the ring body 114, and is used to reset the sliding ring 112. The edges of the sliding ring 112 and the ring body 114 are both chamfered to fit with the inclined surface set at the bottom of the limiting rod 211.

[0050] As an implementation method, Figure 3 , Figure 4 and Figure 5 As shown, further:

[0051] The second limiting member 21 includes a limiting rod 211. A moving groove is provided at the port of the second joint 2 near the first joint 1. The limiting rod 211 penetrates the moving groove of the second joint 2 and extends to the outside for sliding connection. A third spring 212 is installed between the bottom of the limiting rod 211 and the inner wall of the moving groove. The bottom of the limiting rod 211 is set as an inclined surface, which fits with the chamfered edges of the sliding ring 112 and the ring body 114 respectively.

[0052] In this embodiment, the purpose of the above-mentioned setting is that when the chamfered edges of the ring body 114 squeeze and push the inclined surface of the limit rod 211, the limit rod 211 moves toward the outside of the second joint 2 and squeezes the third spring 212, and at the same time, the second joint 2 pushes the outer wall of the movable ring 4, and the movable ring 4 squeezes the fourth spring 3. After the ring body 114 passes through the two limit rods 211, the tension of the third spring 212 props up the limit rod 211, and the ring body 114 blocks the return path of the two limit rods 211. At the same time, the tension of the fourth spring 3 props up the movable ring 4, keeps the limit of the second joint 2 taut, and prevents the second joint 2 from loosening when plugged in.

[0053] As an implementation method, Figure 3 and Figure 4 As shown, further:

[0054] The first sealing member 10 comprises a first groove ring cavity 101, which is mounted on the outer wall of the first joint 1, and is provided with an inner cavity and an outer cavity, a first spring 103 is installed inside the inner cavity, a first sealing ring 104 is slidably connected to the inner wall of the inner cavity, the first sealing ring 104 is connected to the first spring 103, and a groove is provided on the outer wall of the first sealing ring 104,

[0055] In this embodiment, the purpose of the above arrangement is that the tension of the first spring 103 props up the first sealing ring 104 so that the groove of the first sealing ring 104 and the convex ring of the second sealing ring 202 fit closely to each other.

[0056] As an implementation method, Figure 3 and Figure 4 As shown, further:

[0057] The second sealing member 20 comprises a second groove ring cavity 201, which is mounted on the outer wall of the second joint 2, a second sealing ring 202 is mounted on the inner wall of the second groove ring cavity 201, the second sealing ring 202 extends to the port of the second groove ring cavity 201, a convex ring is mounted on the outer wall of the second sealing ring 202, and the convex ring of the second sealing ring 202 fits with the groove of the first sealing ring 104.

[0058] In this embodiment, the purpose of the above-mentioned setting is that when the first joint 1 and the second joint 2 are plugged into each other, the second sealing ring 202 is plugged into the inner cavity, and the tension of the first spring 103 props up the first sealing ring 104, so that the groove of the first sealing ring 104 and the convex ring of the second sealing ring 202 fit closely with each other.

[0059] As an implementation method, Figure 1 - Figure 4 As shown, further:

[0060] An annular rubber 102 is installed on the inner wall of the outer cavity, and the outer ring of the second groove ring cavity 201 is inserted into the inner part of the outer cavity. The annular rubber 102 wraps the outer ring wall of the second groove ring cavity 201.

[0061] In this embodiment, the purpose of the above-mentioned setting is that when the first joint 1 and the second joint 2 are plugged into each other, the second sealing ring 202 is plugged into the interior of the inner cavity, and the annular rubber 102 is inclined toward the interior of the outer cavity. When the outer ring of the second groove ring cavity 201 is plugged into the interior of the outer cavity, the annular rubber 102 wraps the outer ring wall of the second groove ring cavity 201, and the second groove ring cavity 201 squeezes the annular rubber 102, and the outer walls of the two fit closely to each other, thereby achieving better sealing.

[0062] As an implementation method, Figure 4 As shown, further:

[0063] The second joint 2 is provided with a through hole inside, and the first stopper 11 is inserted into the through hole. The chamfered edges of the ring body 114 push the stopper rod 211.

[0064] In this embodiment, the purpose of the above-mentioned setting is that when the chamfered edges of the ring body 114 squeeze and push the inclined surface of the limit rod 211, the limit rod 211 moves to the outside of the second joint 2 and squeezes the third spring 212. At the same time, the second joint 2 pushes the outer wall of the movable ring 4, and the movable ring 4 squeezes the fourth spring 3. After the ring body 114 passes through the two limit rods 211, the tension of the third spring 212 props up the limit rod 211, and the two limit rods 211 block the return path of the ring body 114.

[0065] Working principle: When the chamfered edges of the ring body 114 squeeze and push the inclined surface of the limiting rod 211, the limiting rod 211 moves to the outside of the second joint 2 and squeezes the third spring 212, and at the same time, the second joint 2 pushes the outer wall of the movable ring 4, and the movable ring 4 squeezes the fourth spring 3. After the ring body 114 passes through the two limiting rods 211, the tension of the third spring 212 props up the limiting rod 211, and the ring body 114 blocks the return path of the two limiting rods 211. At the same time, the tension of the fourth spring 3 props up the movable ring 4, keeps the limit of the second joint 2 tight, and prevents the second joint 2 from being loosened when plugged in;

[0066] When the first joint 1 and the second joint 2 are plugged into each other, the second sealing ring 202 is plugged into the inner cavity, and the tension of the first spring 103 props up the first sealing ring 104, so that the groove of the first sealing ring 104 and the convex ring of the second sealing ring 202 fit closely with each other;

[0067] When the first joint 1 and the second joint 2 are plugged into each other, the second sealing ring 202 is plugged into the inner cavity, and the annular rubber 102 is inclined against the inner part of the outer cavity. When the outer ring of the second groove ring cavity 201 is plugged into the inner part of the outer cavity, the annular rubber 102 wraps the outer ring wall of the second groove ring cavity 201, and the second groove ring cavity 201 squeezes the annular rubber 102, and the outer walls of the two are closely attached to each other, thereby achieving better sealing performance;

[0068] When disassembly is required, Figure 1 - Figure 4 , continue to press the second joint 2, the second joint 2 continues to move toward the inside of the first joint 1, the sliding ring 112 squeezes and pushes the two limit rods 211, the limit rods 211 squeeze the third spring 212, the limit rods 211 retract, and after the two limit rods 211 pass through the sliding ring 112, the third spring 212 resets the limit rods 211;

[0069] Then the second joint 2 is moved out from the inside of the first joint 1, the inclined surfaces of the two limiting rods 211 fit with the chamfered edges of the sliding ring 112, the tension of the third spring 212 is greater than the tension of the second spring 113, and when the two limiting rods 211 push the sliding ring 112, the second spring 113 is squeezed, and the two limiting rods 211 will not reversely squeeze the third spring 212, so that the sliding ring 112 is close to the ring body 114, and the second spring 113 is squeezed and contracted to the inside of the ring body 114, and at this time, the sliding ring 112 and the ring body 114 are close to each other;

[0070] Continue to move the second joint 2, the pulling force on the second joint 2 is greater than the tension of the third spring 212, the bottom of the limit rod 211 will be reversely squeezed by the sliding ring 112, the limit rod 211 retracts to the inside of the second joint 2, and the limit rod 211 passes through the sliding ring 112 and the ring body 114, thereby realizing the separation and disassembly of the first joint 1 and the second joint 2;

[0071] Combination Figure 2 and Figure 3 When the plug-in device is in the connected state, it also has the function of preventing accidental triggering and disassembly. The ring body 114 blocks the return path of the two limit rods 211. At the same time, the tension of the fourth spring 3 props up the movable ring 4, and keeps the limit of the second joint 2 tight to prevent the second joint 2 from being loosened when plugged in. In this way, a certain pressing force is required to press the second joint 2 close to the first joint 1, so that the second joint 2 is not easily triggered, thereby maintaining the stability of the connection between the first joint 1 and the second joint 2;

[0072] Combined with Figure 2 The limiting rod 211 is close to the outer wall of the ring body 114, and the tension of the second spring 113 keeps the sliding ring 112 propped up, so that the sliding ring 112 keeps a distance from the ring body 114. Therefore, when the pressing force on the second joint 2 is less than the tension of the fourth spring 3, the second joint 2 moves a smaller distance into the first joint 1. In this case, the first joint 1 and the second joint 2 cannot be disassembled, thereby preventing accidental triggering and disassembly.

Claims

1. A plug-in device for power supply, comprising a first connector (1) and a second connector (2), wherein the first connector (1) and the second connector (2) are plugged into each other, a T-shaped cross-section column is installed on the inner wall of the first connector (1), a first stopper (11) is installed on the top of the T-shaped cross-section column, and two second stoppers (21) are installed on one end of the second connector (2) close to the first connector (1); The first limiting member (11) of the first joint (1) and the second limiting member (21) of the second joint (2) cooperate with each other in limiting positions; A plurality of fourth springs (3) are mounted on the inner wall of the first joint (1); a movable ring (4) is mounted on one end of the fourth spring (3) away from the first joint (1); the movable ring (4) is slidably connected to the inner wall of the first joint (1); when the first joint (1) is not connected to the second joint (2), the movable ring (4) closes the port of the first joint (1); A first sealing member (10) is installed on the outer wall of the first joint (1), and a second sealing member (20) is installed on the outer wall of the second joint (2); after the first joint (1) and the second joint (2) are connected in a limited position, the first sealing member (10) and the second sealing member (20) are tightly attached to each other for sealing, and are characterized in that: The second sealing member (20) comprises a second groove ring cavity (201), the second groove ring cavity (201) being mounted on the outer wall of the second joint (2), a second sealing ring (202) being mounted on the inner wall of the second groove ring cavity (201), the second sealing ring (202) extending to the end of the second groove ring cavity (201), a convex ring being mounted on the outer wall of the second sealing ring (202), the convex ring of the second sealing ring (202) being fitted with the groove of the first sealing ring (104); The first sealing member (10) comprises a first groove ring cavity (101), the first groove ring cavity (101) being mounted on the outer wall of the first joint (1), the first groove ring cavity (101) being provided with an inner cavity and an outer cavity, a first spring (103) being mounted inside the inner cavity, a first sealing ring (104) being slidably connected to the inner wall of the inner cavity, the first sealing ring (104) being connected to the first spring (103), and a groove being provided on the outer wall of the first sealing ring (104); An annular rubber (102) is installed on the inner wall of the outer cavity, the outer ring of the second groove ring cavity (201) is inserted into the interior of the outer cavity, and the annular rubber (102) wraps the outer ring wall of the second groove ring cavity (201).

2. A power supply plug device according to claim 1, characterized in that: The first limiting member (11) comprises a vertical rod (111), a sliding groove is formed on the outer wall of the vertical rod (111), a sliding ring (112) is slidably connected to the sliding groove of the vertical rod (111), a ring body (114) is installed at one end of the vertical rod (111), the sliding groove of the vertical rod (111) extends to the inside of the ring body (114), a second spring (113) is connected between the outer wall of the sliding ring (112) and the ring body (114), and the second spring (113) is located inside the sliding groove of the vertical rod (111); The edges of the sliding ring (112) and the ring body (114) are both provided with chamfers.

3. A power supply plug device according to claim 2, characterized in that: The second limiting member (21) comprises a limiting rod (211); a movable groove is provided at the end of the second joint (2) close to the first joint (1); the limiting rod (211) passes through the movable groove of the second joint (2) and extends to the outside for sliding connection; a third spring (212) is installed between the bottom of the limiting rod (211) and the inner wall of the movable groove; the bottom of the limiting rod (211) is provided as an inclined surface, which respectively matches the chamfered edges of the sliding ring (112) and the ring body (114).

4. A power supply plug device according to claim 3, characterized in that: A through hole is provided inside the second joint (2), the first limiting member (11) is inserted into the through hole, and the chamfered edges of the ring body (114) push the limiting rod (211).

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