Industrial network plug and socket structure

Abstract

The invention discloses an industrial network plug and socket structure, which relates to the technical field of network connectors. The invention comprises a plug and a socket. The socket is provided with a self-locking device. The self-locking device comprises a top plate, a driving cylinder, a self-locking cylinder and a self-locking circuit for transmitting pressure between the driving cylinder and the self-locking cylinder. The top plate is arranged below the socket terminal. The top plate is connected to the self-locking cylinder so as to be driven to move up and down. When the plug is inserted into the socket, the front end surface of the plug contacts and pushes the driving cylinder. The self-locking circuit transmits pressure to the self-locking cylinder. The self-locking cylinder drives the top plate to move up and press against the socket terminal, so that the socket terminal cannot jump and maintains close contact with the plug terminal, thereby preventing the plug and the socket from sliding relative to each other in the gap due to vibration, thereby avoiding the phenomenon of loose connection and poor contact between the plug and the socket due to vibration.

Description

Technical Field

[0001] The invention relates to the technical field of network connectors, and in particular to an industrial network plug and socket structure. Background Art

[0002] As the most widely used network interface, the RJ45 interface is widely used and has good compatibility. Its standardized design makes it flexible and easy to use, which provides great convenience for network connection matching between different devices. The RJ45 interface includes a plug and a socket. The plug is usually fixed with the socket by a plug-in spring. It can be pulled out of the socket by pressing the plug-in spring. The plug and the socket are respectively provided with a plug terminal and a socket terminal. After the plug is inserted into the socket, the plug terminal and the socket terminal contact each other, thereby realizing data transmission. In order to facilitate the plug-in and the plug-out, the tolerance range allowed by the plug and the socket is relatively large. After the plug is inserted into the socket, there is a gap between the plug and the socket, and the plug still has a certain range of movement. At the same time, the socket terminal is usually full of elasticity and has a certain range of movement. In a static or slightly dynamically changing environment, this gap and range of movement have little effect on data transmission and will not cause obvious problems. However, in industrial application scenarios, such as manufacturing production lines, the production lines often contain many motors, cylinders and other various equipment. When these devices are in operation, they will cause continuous vibration and impact to the plugs and sockets. The gap between the plugs and sockets may cause their connection to loosen, and the elastic socket terminals may jump, causing continuous jumping and disconnection with the plug terminals, which in turn causes network signal interruption, data packet loss and even a significant decrease in connection stability. Summary of the invention

[0003] In view of this, the present invention provides an industrial network plug and socket structure, wherein after the plug is inserted into the socket, the plug terminal and the socket terminal can stably contact each other, and the connection stability is better.

[0004] To achieve the above objectives, the present invention provides the following technical solutions.

[0005] An industrial network plug and socket structure includes a plug and a socket, wherein the plug and the socket are respectively provided with a plug terminal and a socket terminal. After the plug is inserted into the socket, the plug terminal and the socket terminal contact each other to transmit data. The socket is provided with a self-locking device, which includes a top plate, a drive cylinder, a self-locking cylinder and a self-locking circuit for transmitting pressure between the drive cylinder and the self-locking cylinder. The top plate is arranged below the socket terminal, and the top plate is connected to the self-locking cylinder to be driven to move up and down. When the plug is inserted into the socket, the front end surface of the plug contacts and pushes the drive cylinder, and the self-locking circuit transmits pressure to the self-locking cylinder. The self-locking cylinder drives the top plate to move up and press against the socket terminal, so that the socket terminal cannot jump and maintains close contact with the plug terminal.

[0006] After the plug is inserted into the socket, the driving cylinder, the self-locking cylinder and the self-locking circuit always maintain a certain pressure under the restriction of the plug, so that the top plate can also always press against the socket terminal. The socket terminal is under the pressure of the top plate and keeps in close contact with the plug terminal and cannot jump. At the same time, the top plate also keeps close contact between the plug and the socket, avoiding relative sliding of the plug and the socket in the gap due to vibration, thereby avoiding loose connection and poor contact between the plug and the socket due to vibration. The plug terminal and the socket terminal can be in stable contact, and the connection stability is better.

[0007] Among them, the socket also includes a seat body, a base and a pressurizing device. The seat body is used to connect with the plug, and the base is slidably connected to the seat body. The pressurizing device includes a pressurizing cylinder and a pressurizing circuit for transmitting pressure between the pressurizing cylinder and the self-locking cylinder. When the seat body moves backward relative to the base, the rear end face of the seat body contacts and pushes the pressurizing cylinder, and the pressurizing circuit transmits the pressure to the self-locking cylinder, and the self-locking cylinder drives the top plate to move up and tighten the socket terminal.

[0008] Among them, the self-locking cylinder is also connected to a relay cavity, and the self-locking circuit and the pressurizing circuit are respectively connected to the relay cavity to transmit pressure to the self-locking cylinder. A relay piston for transmitting the pressure of the pressurizing device is provided in the relay cavity. When the pressurizing cylinder is pushed backward by the seat body, the pressure is transmitted through the pressurizing circuit to push the relay piston to move in the relay cavity. The relay piston moves in the relay cavity and transmits pressure to the self-locking cylinder, and blocks the interface between the self-locking circuit and the relay cavity to prevent the self-locking cylinder from being depressurized by the self-locking circuit.

[0009] Among them, the socket is also provided with a pressure relief device, which includes a pressure relief circuit and a pressure relief switch mechanism for switching the pressure relief circuit. The pressure relief circuit is connected to the self-locking cylinder. When the pressure relief switch mechanism is triggered to open the pressure relief circuit, the self-locking cylinder is depressurized by the pressure relief circuit, so that the top plate drops and breaks contact with the socket terminal, making it easier to pull the plug out of the socket.

[0010] Among them, the plug is provided with a pressing assembly and a plug-in spring for limiting the position with the socket card, the pressure relief switch mechanism includes a switch slider and a reset spring, the reset spring is connected to the switch slider to push the switch slider to move and reset to close the pressure relief circuit, the switch slider is provided with a pressure relief port, the pressing assembly includes a trigger cylinder, a trigger circuit and a trigger push rod, the trigger cylinder is arranged under the plug-in spring, the trigger circuit is respectively connected to the trigger push rod and the trigger cylinder to transfer pressure therebetween, when the plug-in spring is pressed downward, the plug-in spring presses the trigger cylinder downward, and the pressure transmitted through the trigger circuit pushes the trigger push rod to move to contact and push the switch slider to move, so that the pressure relief port is aligned with the pressure relief circuit to open the pressure relief circuit.

[0011] Among them, the trigger push rod includes a push rod body and a rotating rod for contacting and pushing the switch slider. The rotating rod is rotationally connected to the push rod body and is provided with a reset torsion spring. The rotating axis of the rotating rod is parallel to the moving direction of the switch slider so that it can be deflected to avoid the switch slider. The reset torsion spring is used to reset the rotating rod to align with the switch slider after avoiding the switch slider.

[0012] Among them, the pressure relief device also includes a pressure relief cylinder, which is provided with a back-pressure piston and a back-pressure spring. When the pressure relief circuit is opened, the pressure relief circuit is connected to the pressure relief cylinder, so that the transmission medium in the self-locking cylinder enters the pressure relief cylinder and pushes the back-pressure piston to move. After the plug is pulled out from the socket, the back-pressure spring drives the back-pressure piston to move and reset, so as to push the transmission medium in the pressure relief cylinder back into the self-locking cylinder via the pressure relief circuit.

[0013] Among them, the pressure relief device also includes a telescopic stop pin for engaging with the plug-in spring piece. The telescopic stop pin is fixedly connected to the back-pressure piston and extends out of the pressure relief cylinder to clamp and limit the plug-in spring piece. When the pressure relief circuit is opened, the telescopic stop pin moves with the back-pressure piston and disengages from the plug-in spring piece to release the limitation of the plug-in spring piece.

[0014] Among them, the pressure relief switch mechanism also includes a switch cavity, an air vent and a valve core. The switch slider is arranged in the switch cavity and can slide. The valve core is arranged in the air vent and can slide. The inner end and the outer end of the air vent are respectively connected to the switch cavity and the outside. The valve core is provided with a normally open air port and a one-way air port which can be blocked by the inner end of the air vent. When the trigger push rod pushes the switch slider to move and opens the pressure relief circuit, the switch slider pushes the air in the switch cavity to be discharged through the air vent, and the valve core is pushed by the airflow to be close to the outer end of the air vent, and the normally open air port and the one-way air port are both opened, and the air is discharged from the normally open air port and the one-way air port. When the return pressure spring pushes the switch slider to move and reset to close the pressure relief circuit, the switch slider draws external air into the switch cavity from the air vent, and the valve core is pushed by the airflow to be close to the inner end of the air vent, the one-way air port is blocked, and air is drawn in from the normally open air port. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the plug and socket structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the plug after it is inserted into the socket.

[0017] Figure 3 For some pressure relief devices along Figure 2 Cross-sectional view along the AA direction.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the pressing component.

[0019] Figure 5 A cross-sectional view of the trigger push rod and the trigger circuit.

[0020] Figure 6 Exploded view of the back-pressure piston, telescopic stop pin, switch slider and pressure relief cylinder.

[0021] Figure 7 It is a cross-sectional view of the pressure relief switch mechanism and the pressure relief cylinder.

[0022] Figure 8 for Figure 7 Enlarged schematic diagram at point A in the middle.

[0023] Fig. 9 It is a schematic diagram of the three-dimensional structure of the valve core.

[0024] Reference numerals include:

[0025] Plug 1, pressing assembly 11, trigger cylinder 111, trigger circuit 112, trigger push rod 113, push rod body 1131, rotating rod 1132, trigger spring 114, plug-in spring 12;

[0026] Socket 2, driving cylinder 21, driving spring 211, self-locking cylinder 22, self-locking circuit 221, top plate 23, pressurizing cylinder 24, pressurizing circuit 241, pressurizing spring 242, relay cavity 25, relay piston 251, socket terminal 26, seat body 27, base 28;

[0027] Pressure relief cylinder 3, pressure relief circuit 31, switch slider 32, pressure relief port 321, switch cavity 33, reset spring 331, vent hole 332, valve core 333, normally open air port 3331, one-way air port 3332, back pressure piston 34, back pressure spring 341, telescopic stop pin 35, opening 36 of pressure relief cylinder. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with specific embodiments.

[0029] like Figure 1 and 2As shown, the industrial network plug and socket structure of this embodiment includes a plug 1 and a socket 2, wherein the plug 1 and the socket 2 are respectively provided with a plug terminal and a socket terminal 26, the plug 1 is provided with a plug spring 12, after the plug 1 is inserted into the socket 2, the plug spring 12 engages with the socket, thereby locking the plug in the socket, the plug terminal and the socket terminal 26 contact each other, the socket 2 is provided with a self-locking device, the self-locking device includes a top plate 23, a driving cylinder 21, a self-locking cylinder 22 and a self-locking circuit 221, the self-locking circuit 221 is filled with gas or liquid as a transmission medium for transmitting the driving cylinder The pressure between the drive cylinder 21 and the self-locking cylinder 22 is used to realize the transmission between them. A drive spring 211 is also provided for resetting the drive cylinder 21. The top plate 23 is arranged below the socket terminal 26. The top plate 23 is connected to the self-locking cylinder 22. The self-locking cylinder 22 drives the top plate 23 to move up and down. When the plug 1 is inserted into the socket 2, the front end surface of the plug 1 contacts and pushes the drive cylinder 21. The drive spring 211 is compressed and driven by the self-locking circuit 221. The self-locking cylinder 22 drives the top plate 23 to move up and press against the socket terminal 26. The socket terminal 26 cannot jump and maintains close contact with the plug terminal. After the plug 1 is pulled out, the drive spring 211 pushes the drive cylinder 21 to reset. Through the self-locking circuit 221, the self-locking cylinder 22 drives the top plate 23 to drop and disengage from the socket terminal. After the plug 1 is inserted into the socket 2, the driving cylinder 21, the self-locking cylinder 22 and the self-locking circuit 221 always maintain a certain pressure under the restriction of the plug 1, so that the top plate 23 can also always press against the socket terminal 26. The socket terminal 26 is subjected to the pressure of the top plate 23 and thus maintains close contact with the plug terminal and cannot jump. At the same time, the top plate 23 also maintains close contact between the plug 1 and the socket 2, avoiding relative sliding between the plug 1 and the socket 2 in the gap due to vibration, thereby avoiding loose connection and poor contact between the plug 1 and the socket 2 due to vibration. The plug terminal and the socket terminal 26 can be in stable contact, and the connection stability is better.

[0030] In industrial application scenarios, there may be relative movement between devices connected to the network. During the movement, their connection lines may be accidentally pulled. In addition, the movement of people and the handling of goods in the factory may cause the network cable to be pulled. Plug 1 may be accidentally pulled after being inserted into socket 2. In these cases, since the self-locking device relies on the front end of plug 1 to push the drive cylinder 21, when it is accidentally pulled, plug 1 will move back slightly, and drive cylinder 21 will also reset slightly. The pressure on top plate 23 will decrease, making it impossible to tighten the socket terminal 26 and plug 1, which may cause the self-locking device to fail, affecting the stability of the signal connection between the plug and the socket, and even causing the stuck plug spring 12 to be damaged, and plug 1 to be pulled out of socket 2. Figure 1-Figure 2As shown, the socket 2 includes a seat body 27, a base 28 and a pressurizing device. The seat body 27 is used to connect with the plug 1. The base 28 is slidably connected to the seat body 27 and has a certain sliding freedom. The pressurizing device includes a pressurizing cylinder 24, a pressurizing spring 242 and a pressurizing circuit 241. The pressurizing circuit 241 connects the pressurizing cylinder 24 and the self-locking cylinder 22. The pressurizing circuit 241 is filled with gas or liquid as a transmission medium to transfer the pressure between the pressurizing cylinder 24 and the self-locking cylinder 22 to achieve transmission between them. The pressurizing spring 242 is used to reset the pressurizing cylinder 24. When the seat body 27 moves backward relative to the base 28, the rear end face of the seat body 27 contacts and pushes the pressurizing cylinder 24. Through the transmission of the pressurizing circuit 241, the self-locking cylinder 22 drives the top plate 23 to move up and tighten the socket terminal 26. When the plug 1 is accidentally pulled, the seat body 27 can be driven to move backward, and the seat body 27 can then drive the pressure-applying device to further apply pressure to the self-locking cylinder 22, thereby increasing the pressure of the top plate 23 to press the socket terminal 26 and the plug 1 upward, thereby achieving the effect that the greater the pulling force on the plug 1, the tighter the connection between the plug 1 and the socket 2, thereby avoiding affecting the stability of the signal connection between the plug 1 and the socket 2 due to accidental pulling, and making it more difficult for the plug 1 to be pulled out of the socket 2.

[0031] When the seat 27 moves backward to push the pressurizing cylinder 24, the driving cylinder 21 is reset. Since the pressurizing circuit 241 and the self-locking circuit 221 are both connected to the self-locking cylinder 22, the gas or liquid transmitted by the pressurizing circuit 241 may be dispersed to the self-locking circuit 221 and even the driving cylinder 21, so that the pressurizing effect of the pressurizing device is reduced. Figure 2 As shown, further, the self-locking cylinder 22 of the present embodiment is also connected to the relay cavity 25, the self-locking circuit 221 and the pressurizing circuit 241 are respectively connected to the relay cavity 25 and transmit pressure to the self-locking cylinder 22 through the relay cavity 25, and a relay piston 251 for transmitting the pressure of the pressurizing device is provided in the relay cavity 25. When the pressurizing cylinder 24 is pushed backward by the seat body 27, the pressure is transmitted through the pressurizing circuit 241 to push the relay piston 251 to move in the relay cavity 25, and the relay piston 251 moves in the relay cavity 25 to transmit pressure to the self-locking cylinder 22, and blocks the interface between the self-locking circuit 221 and the relay cavity 25, so that when the pressurizing device pressurizes the top plate 23, the pressure cannot be dispersed by the self-locking circuit 221, thereby ensuring the pressing strength of the top plate 23 on the socket terminal 26.

[0032] Because the top plate 23 will keep pressing against the socket terminal 26 under the action of the self-locking device, when the plug 1 is pulled out, the friction between the plug 1 and the socket 2 will cause the plug 1 to drive the seat body 27 to move backward and push the pressure device, so that the top plate 23 is pressed against the socket terminal 26 more tightly, making it difficult to pull out the plug 1. Figure 2-Figure 5As shown, the socket 2 is also provided with a pressure relief device, which includes a pressure relief circuit 31 and a pressure relief switch mechanism for switching the pressure relief circuit 31. The pressure relief circuit 31 is connected to the self-locking cylinder 22 (because the pressure relief circuit 31 is bent, the connection between the pressure relief circuit and the self-locking cylinder 22 cannot be shown in the attached figure). When the pressure relief switch mechanism is triggered to open the pressure relief circuit 31, the self-locking cylinder 22 is depressurized by the pressure relief circuit 31, and the top plate 23 descends and disengages from the socket terminal 26, so that the plug 1 can be smoothly pulled out of the socket 2.

[0033] In the existing RJ45 connector, the plug 1 and the socket 2 are usually locked together by a plug spring 12 on the plug 1. When the plug 1 is pulled out, the plug 1 and the socket 2 can be unlocked by pressing the spring. Figure 2-Figure 5 The plug 1 of this embodiment is provided with a pressing component 11, and the pressure relief switch mechanism includes a switch slider 32 and a reset spring 331. The reset spring 331 is connected to the switch slider 32 to push the switch slider 32 to move and reset to close the pressure relief circuit 31. The switch slider 32 is provided with a pressure relief port 321. The pressing component 11 includes a trigger cylinder 111, a trigger spring 114, a trigger circuit 112 and a trigger push rod 113. The trigger spring 114 is used to reset the trigger cylinder 111. The trigger cylinder 111 is arranged below the plug-in spring piece 12. The trigger circuit 112 is respectively connected to the trigger push rod 113 and the trigger cylinder 111 to transfer the pressure therebetween. When the plug-in spring piece 12 is pressed downward, the plug-in spring piece 12 presses the trigger cylinder 111 downward, and the pressure transmitted through the trigger circuit 112 pushes the trigger push rod 113 to move to contact and push the switch slider 32 to move. The pressure relief port 321 moves with the switch slider 32 to align with the pressure relief circuit 31, thereby opening the pressure relief circuit 31. A pressing assembly 11 is provided on the plug 1, so that the pressure relief switch mechanism can be triggered when the plug spring 12 is pressed, thereby opening the pressure relief circuit 31 to release pressure, and the plug 1 can be smoothly unplugged without changing the original operating habit of unplugging the plug 1.

[0034] When the plug 1 is inserted into the socket 2, the plug spring 12 will be engaged with the socket 2, and the plug spring 12 will be pressed to a certain extent by the socket 2. At the same time, the operator may also press the plug spring 12, causing the plug spring 12 to press the trigger cylinder 111, so that the trigger push rod 113 is pushed out in advance when it is not needed, and the switch slider 32 remains extended under the action of the return spring 331, which will cause the side of the switch slider 32 to have a hard contact with the trigger push rod 113, resulting in the situation that the plug 1 is blocked and cannot be inserted into the socket 2, such as Figure 2-Figure 4As shown, the trigger push rod 113 of this embodiment includes a push rod body 1131 and a rotating rod 1132 for contacting and pushing the switch slider 32. The rotating rod 1132 is rotatably connected to the push rod body 1131 and is provided with a reset torsion spring. The rotation axis of the rotating rod 1132 is parallel to the moving direction of the switch slider 32. When the trigger push rod 113 is extended in advance and collides with the switch slider 32, the rotating rod 1132 can deflect around the rotation axis to avoid the switch slider 32, thereby preventing the plug 1 from being unable to be inserted into the socket 2 due to the blocking of the trigger push rod 113 and the switch slider 32. When the plug-in spring 12 is released, the trigger cylinder 111 is reset, the trigger push rod 113 is retracted, and after the rotating rod 1132 is out of contact with the switch slider 32, the rotating rod 1132 is reset to align with the switch slider 32 under the action of the reset torsion spring. By providing the trigger push rod 113 including the rotating rod 1132, when the trigger push rod 113 extended in advance contacts the side of the switch slider 32, the rotating rod 1132 can deflect to avoid the switch slider 32, so as to prevent the trigger push rod 113 from being stuck by the switch slider 32, thereby allowing the plug 1 to be inserted into the socket 2. After the plug 1 is inserted into the socket 2, the plug spring 12 is reset and no longer presses the trigger cylinder 111, the trigger push rod 113 retracts and resets, and the rotating rod 1132 is reset to align with the switch slider 32 under the action of the reset torsion spring. When the plug 1 needs to be unplugged, the push rod body 1131 drives the rotating rod 1132 to move to contact and push the switch slider 32.

[0035] Combination Figure 3 , Figure 6 and Figure 7 In this embodiment, the pressure relief device also includes a pressure relief cylinder 3, in which a back pressure piston 34 and a back pressure spring 341 are arranged. When the pressure relief circuit 31 is opened, the opening 36 of the pressure relief cylinder 3 is aligned with the pressure relief port 321, and the pressure relief circuit 31 is connected to the pressure relief cylinder 3. The transmission medium in the self-locking cylinder 22 enters the pressure relief cylinder 3 through the pressure relief circuit 31 and pushes the back pressure piston 34 to move. After the plug 1 is pulled out from the socket 2, the back pressure spring 341 drives the back pressure piston 34 to move and reset, and pushes the transmission medium in the pressure relief cylinder 3 back into the self-locking cylinder 22 through the pressure relief circuit 31. The pressure relief circuit 31 is connected to the pressure relief cylinder 3 to form a closed pipeline, and the transmission medium used by the self-locking device and the pressurizing device can be recycled and does not need to be connected to the outside world. When gas is selected as the transmission medium, dust can be prevented from clogging the air outlet and other interference factors can be avoided. Liquid can also be selected as the transmission medium to make the tightening effect and transmission effect of the self-locking device and the pressurizing device more stable.

[0036] Combination Figure 6-Figure 7The pressure relief device is also provided with a telescopic stop pin 35 for engaging with the plug-in spring piece 12. The telescopic stop pin 35 is fixedly connected to the back pressure piston 34 and extends out of the pressure relief cylinder 3. The telescopic stop pin 35 can clamp and limit the plug-in spring piece 12. When the pressure relief circuit 31 is opened, the telescopic stop pin 35 moves with the back pressure piston 34 and disengages from the plug-in spring piece 12, thereby releasing the limit on the plug-in spring piece 12. After the plug 1 is inserted into the socket 2, the plug-in spring piece 12 of the plug 1 cooperates with the telescopic stop pin 35 to engage, so that the plug 1 is clamped and limited by the telescopic stop pin 35 and cannot be pulled out. The telescopic stop pin 35 is linked with the pressure relief device. When the plug-in spring piece 12 is pressed to trigger the pressure relief device, the pressure released by the pressure relief circuit 31 is used to push the telescopic stop pin 35 back at the same time, so that the telescopic stop pin 35 is disengaged from the plug-in spring piece 12, and the limit on the plug 1 is released.

[0037] After the plug 1 is pulled out, the pressure relief cylinder 3 and the self-locking device must be reset to prepare for the next working cycle. If the pressure relief circuit 31 is closed immediately after the plug 1 is pulled out, the transmission medium will not be able to return from the pressure relief cylinder 3 to the self-locking cylinder 22, and the pressure relief cylinder 3 and the self-locking device will not be able to reset, resulting in the next time the plug 1 is inserted, the telescopic stop pin 35 cannot be extended, and the self-locking device fails. Figure 7-Figure 9 The pressure relief switch mechanism of the present embodiment further comprises a switch cavity 33, an air vent 332 and a valve core 333. The valve core 333 is in a cone shape. The switch slider 32 is arranged in the switch cavity 33 and can slide. The valve core 333 is arranged in the air vent 332 and can slide. The inner end and the outer end of the air vent 332 are connected to the switch cavity 33 and the outside respectively. The valve core 333 is provided with a normally open air port 3331 and a one-way air port 3332. The normally open air port 3331 is arranged in the center of the valve core 333. The one-way air port 3332 is provided with four ports, which are evenly distributed around the valve core 333. The inner end shape of the air vent 332 corresponds to the cone-shaped valve core 333. When the valve core 333 is close to the inner end of the air vent 332, the one-way air port 3331 around the valve core 333 can be blocked. 32. When the trigger push rod 113 pushes the switch slider 32 to move and open the pressure relief circuit 31, the switch slider 32 pushes the air in the switch cavity 33 to be discharged through the vent 332, and the valve core 333 is pushed by the air flow to fit the outer end of the vent 332. The normally open air port 3331 and the one-way air port 3332 are both opened, and the air is discharged from the normally open air port 3331 and the one-way air port 3332. When the return pressure spring 341 pushes the switch slider 32 to move and reset and close the pressure relief circuit 31, the switch slider 32 draws external air into the switch cavity 33 from the vent 332, and the valve core 333 is pushed by the air flow to fit the inner end of the vent 332. The one-way air port 3332 is blocked, and air is only drawn in from the normally open air port 3331. The vent hole 332 has the characteristics of fast air outlet and slow air intake, so that the switch slider 32 can only be reset slowly, and the pressure relief circuit 31 is slowly closed, so that the pressure relief device and the self-locking device have enough time to complete the reset.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An industrial network plug and socket structure, comprising a plug and a socket, wherein the plug and the socket are provided with a plug terminal and a socket terminal respectively, and after the plug is inserted into the socket, the plug terminal and the socket terminal contact each other to transmit data, characterized in that: The socket is provided with a self-locking device, which includes a top plate, a driving cylinder, a self-locking cylinder and a self-locking circuit for transmitting the pressure between the driving cylinder and the self-locking cylinder. The top plate is arranged below the socket terminal, and is connected to the self-locking cylinder so as to be driven to move up and down. When the plug is inserted into the socket, the front end surface of the plug contacts and pushes the driving cylinder, and the self-locking circuit transmits the pressure to the self-locking cylinder, and the self-locking cylinder drives the top plate to move up and press against the socket terminal, so that the socket terminal cannot jump and maintains close contact with the plug terminal. The socket also includes a seat body, a base and a pressurizing device. The seat body is used to connect with the plug, and the base is slidably connected with the seat body. The pressurizing device includes a pressurizing cylinder and a pressurizing circuit for transmitting the pressure between the pressurizing cylinder and the self-locking cylinder. When the seat body moves backward relative to the base, the rear end surface of the seat body contacts and pushes the pressurizing cylinder, and the pressurizing circuit transmits the pressure to the self-locking cylinder, and the self-locking cylinder drives the top plate to move up and press the socket terminal tightly. The self-locking cylinder is also connected to a relay cavity. The self-locking circuit and the pressurizing circuit are respectively connected to the relay cavity to transfer pressure to the self-locking cylinder. A relay piston for transferring the pressure of the pressurizing device is provided in the relay cavity. When the pressurizing cylinder is pushed backward by the seat body, the pressure is transmitted through the pressurizing circuit to push the relay piston to move in the relay cavity. The relay piston moves in the relay cavity to transfer pressure to the self-locking cylinder and blocks the interface between the self-locking circuit and the relay cavity to prevent the self-locking cylinder from being depressurized by the self-locking circuit.

2. The industrial network plug and socket structure according to claim 1, characterized in that: The socket is also provided with a pressure relief device, which includes a pressure relief circuit and a pressure relief switch mechanism for switching the pressure relief circuit. The pressure relief circuit is connected to the self-locking cylinder. When the pressure relief switch mechanism is triggered to open the pressure relief circuit, the self-locking cylinder is depressurized by the pressure relief circuit, so that the top plate drops and breaks contact with the socket terminal, making it easier to pull the plug out of the socket.

3. The industrial network plug and socket structure according to claim 2, characterized in that: The plug is provided with a pressing assembly and a plug-in spring for limiting the position with the socket card, the pressure relief switch mechanism includes a switch slider and a reset spring, the reset spring is connected to the switch slider to push the switch slider to move and reset to close the pressure relief circuit, the switch slider is provided with a pressure relief port, the pressing assembly includes a trigger cylinder, a trigger circuit and a trigger push rod, the trigger cylinder is arranged under the plug-in spring, the trigger circuit is respectively connected to the trigger push rod and the trigger cylinder to transfer the pressure therebetween, when the plug-in spring is pressed downward, the plug-in spring presses the trigger cylinder downward, and the pressure transmitted through the trigger circuit pushes the trigger push rod to move to contact and push the switch slider to move, so that the pressure relief port is aligned with the pressure relief circuit to open the pressure relief circuit.

4. The industrial network plug and socket structure according to claim 3, characterized in that: The trigger push rod includes a push rod body and a rotating rod for contacting and pushing the switch slider. The rotating rod is rotationally connected to the push rod body and is provided with a reset torsion spring. The rotating axis of the rotating rod is parallel to the moving direction of the switch slider so that it can deflect to avoid the switch slider. The reset torsion spring is used to reset the rotating rod to align with the switch slider after avoiding the switch slider.

5. The industrial network plug and socket structure according to claim 3, characterized in that: The pressure relief device also includes a pressure relief cylinder, which is provided with a back-pressure piston and a back-pressure spring. When the pressure relief circuit is opened, the pressure relief circuit is connected to the pressure relief cylinder, so that the transmission medium in the self-locking cylinder enters the pressure relief cylinder and pushes the back-pressure piston to move. After the plug is pulled out of the socket, the back-pressure spring drives the back-pressure piston to move and reset, so as to push the transmission medium in the pressure relief cylinder back into the self-locking cylinder via the pressure relief circuit.

6. The industrial network plug and socket structure according to claim 5, characterized in that: The pressure relief device also includes a telescopic stop pin for engaging with the plug-in spring piece. The telescopic stop pin is fixedly connected to the back-pressure piston and extends out of the pressure relief cylinder to clamp and limit the plug-in spring piece. When the pressure relief circuit is opened, the telescopic stop pin moves with the back-pressure piston and disengages from the plug-in spring piece to release the limitation on the plug-in spring piece.

7. The industrial network plug and socket structure according to claim 5, characterized in that: The pressure relief switch mechanism also includes a switch cavity, an air vent and a valve core. The switch slider is arranged in the switch cavity and can slide. The valve core is arranged in the air vent and can slide. The inner end and the outer end of the air vent are connected to the switch cavity and the outside respectively. The valve core is provided with a normally open air port and a one-way air port which can be blocked by the inner end of the air vent. When the trigger push rod pushes the switch slider to move and opens the pressure relief circuit, the switch slider pushes the air in the switch cavity to be discharged through the air vent, and the valve core is pushed by the airflow to be close to the outer end of the air vent, and the normally open air port and the one-way air port are both opened, and the air is discharged from the normally open air port and the one-way air port. When the return pressure spring pushes the switch slider to move and reset to close the pressure relief circuit, the switch slider draws external air into the switch cavity from the air vent, and the valve core is pushed by the airflow to be close to the inner end of the air vent, the one-way air port is blocked, and air is drawn in from the normally open air port.

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