A self-shorting aviation plug
By introducing T-shaped protrusions and epoxy resin layers into the self-short circuit aerial insert, the problems of insufficient creepage distance and poor sealing are solved, and higher safety and convenient disassembly and assembly effects are achieved.
Patent Information
- Application Number
- CN202011041423.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-09-28
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2040-09-28
AI Technical Summary
The creepage distance between adjacent pins in existing self-short circuit plugs is insufficient, resulting in potential leakage current paths and poor sealing effect.
The structural design with T-shaped protrusions on the insulating seat increases creepage distance and is sealed by an epoxy resin layer. The rotating part and torsion spring design are easy to disassemble and assemble, and the sealing is improved using annular fixing part and elastic seal.
It effectively increases the creepage distance between adjacent pins, improves the sealing effect, facilitates the disassembly and assembly and maintenance of the aircraft plug, and enhances the safety and sealing of the equipment.
Smart Images
Figure CN112332181B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a self - short - circuiting aviation plug with good sealing performance and belongs to the field of aviation plugs.
Background Art
[0002] The self - short - circuiting aviation plug is used in a ring - main unit box and includes a plug and a socket. The plug and the socket need to be connected to cables to conduct electricity and transmit signals to the outside world. The plug and the socket used in the self - short - circuiting aviation plug are collectively called self - short - circuiting aviation plug electrical connectors.
[0003] The creepage distance is the shortest path measured along the insulating surface between two conductive components or between a conductive component and the equipment protection interface. That is, in different usage scenarios, due to the polarization of the insulating material around the conductor, the insulating material exhibits a charged phenomenon.
[0004] Generally, there are multiple pins in the plug or the socket, and the distance between adjacent pins is relatively close. When the creepage distance between adjacent pins is small, a leakage current path will be formed on the surface of the insulating material. When these leakage current paths form a conductive path, surface flashover or breakdown phenomena will occur.
Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a self - short - circuiting aviation plug with good sealing performance, so as to increase the creepage distance between adjacent pins.
[0006] To solve the above technical problems, the self-shorting aviation plug of the present invention includes a first core and a second core for plugging with the first core. A plug tube is provided inside the first core, and a plug pin for being inserted into the plug tube is provided inside the second core. The self-shorting aviation plug further includes an insulating seat, a mounting shell, an outer shell, a rotating member and a torsion spring. The insulating seat is inserted into the second core. A through hole for inserting the plug tube and the plug pin is provided on the insulating seat. Along the length direction of the insulating seat, there are multiple through holes, and a protrusion for increasing the creepage distance is provided between each adjacent two through holes. The protrusion includes a T-shaped protrusion. The mounting shell is an annular mounting shell. An annular mounting plate is provided on the inner surface of the mounting shell in the circumferential direction. A peripheral edge is provided outside the first core, and the connection between the peripheral edge and the mounting plate is detachable. The second core is fixed inside the outer shell. One side of the mounting shell along its axial direction is connected to the first core, and the other side is fixedly connected to the outer shell. An epoxy resin layer for sealing is filled between the outer surface of the plug tube and the inner surface of the first core. The self-shorting aviation plug seals the gap between the plug tube and the inner surface of the first core through the epoxy resin layer to prevent gas from flowing out of the gap between the plug tube and the inner surface of the first core. A positioning groove is provided on the rotating member. One of the mounting shell and the outer shell is rotatably connected to the rotating member, and a clamping protrusion for engaging with the positioning groove is provided on the other. One end of the torsion spring is relatively fixed to the mounting shell or the outer shell, and the other end is relatively fixed to the rotating member. When the rotating member is forced to rotate, the torsion spring is deformed by the force, the positioning groove moves away from the clamping protrusion, and the outer shell is separated from the mounting shell. When the rotating member is not forced, the rotating member rotates under the elastic action of the torsion spring, and the positioning groove engages with the clamping protrusion.
[0007] In the prior art, the creepage distance refers to the shortest path measured along the insulating surface between two conductive components or between a conductive component and the equipment protection interface. After adding the protrusion, the path of the creepage distance between two adjacent plug pins needs to pass through the surface of the insulating seat and the surface of the protrusion, thereby increasing the path length and further increasing the creepage distance to prevent equipment damage and danger.
[0008] Based on the above structure, since the conductive part of the plug tube is inside and the conductive part of the plug pin is outside, it is easy for the plug pin to leak electricity. The insulating seat is inserted into the lower shell and wraps the plug pin inside, which can reduce the interference between adjacent plug pins that can be located in the through hole. The protrusion can increase the creepage distance of the part of the plug pin that is not located inside the through hole, further reducing the interference between adjacent plug pins.
[0009] Based on the above structure, when the protrusion is T-shaped, it can block along the length direction of the insulating base to increase the creepage distance, and can also block along the width direction of the insulating base to increase the creepage distance. This can prevent the situation where when there is only a protrusion blocking along the length direction of the insulating base, the path length from one pin to another through the two ends of the protrusion is less than the path when passing through the surface of the protrusion, resulting in a smaller increase in the creepage distance. At the same time, it can prevent the situation where when the length of the protrusion along the width direction of the insulating base is short due to position limitations, it will further reduce the degree of increase in the creepage distance.
[0010] Based on the above structure, in the prior art, the commonly used sealing structure is to directly use a sealant for sealing, and the sealing effect is poor. With the above structure, the aviation plug is sealed by the epoxy resin layer filled between the outer surface of the insertion tube and the inner surface of the first insert core, which can prevent inert gas from flowing out of the socket, thereby improving the sealing effect of the aviation plug.
[0011] Based on the above structure, in the prior art, the socket part of the aviation plug is fixed inside an object. With the above structure, when the aviation plug is disassembled, the first insert core can be located inside the object, and the second insert core can be disassembled and assembled relative to the first insert core. After the first insert core is disassembled, the first insert core can block the gas flow through the epoxy resin layer, enabling the second insert core to be freely disassembled and assembled without gas flowing out, making it very convenient for the staff to install and repair the aviation plug.
[0012] Based on the above structure, during disassembly, the user applies a force to the rotating part to control the rotating part to rotate outward with the rotating protrusion as the axis, and the engaging protrusion is separated from the positioning groove, and the torsion spring is deformed by the force. During installation, the user releases the rotating part and does not apply a force to the rotating part. The rotating part rotates in the reverse direction under the action of the torsion spring, and the engaging protrusion is re-engaged and fixed with the positioning groove, enabling the user to disassemble and assemble the housing more conveniently.
[0013] Preferably, the first insert core is provided with a wire fixing hole, the surface of the epoxy resin layer is higher than the wire fixing hole and lower than the surface of the peripheral edge close to the mounting shell.
[0014] Preferably, a fixing part is provided between the first insert core and the mounting shell. The fixing part is annular, and an annular groove is provided on its inner part. The opening direction of the groove faces the center of the ring. The peripheral edge is located in the groove, and the peripheral edge, the fixing part and the mounting plate are connected by screws.
[0015] Preferably, the fixing part is an elastic part, and an interference fit is provided between the surface of the peripheral edge along its circumferential direction and the bottom surface of the groove along its circumferential direction.
[0016] Preferably, there is an interference fit between the two surfaces perpendicular to the axis of the groove and the two surfaces perpendicular to the axis of the peripheral edge, and there is an interference fit between the surface perpendicular to the axis of the fixing member and the surface of the mounting plate.
[0017] Preferably, an elastic seal is provided between the outer shell and the mounting shell.
[0018] Preferably, multiple rows of pins are provided along the width direction of the lower shell. The distance between adjacent two rows is greater than the creepage distance between adjacent two through holes in each row. The total number of pins in each row is greater than the total number of rows of pins. The T-shaped protrusion includes a transverse protrusion along the length direction of the lower shell and a longitudinal protrusion along the width direction of the lower shell. The longitudinal protrusion is located between adjacent two through holes, and the transverse protrusion is connected to the longitudinal protrusion and is located on the side of the longitudinal protrusion close to the outside of the insulating base.
[0019] Preferably, in two adjacent through holes, when going from one through hole to the other, the length of the shortest path passing through the surface of the insulating base and the surface of the longitudinal protrusion is greater than or equal to the length of the shortest path passing through the surface of the insulating base and the end of the longitudinal protrusion far from the transverse protrusion, and is greater than or equal to the length of the shortest path passing through the surface of the insulating base and the surface of the transverse protrusion.
[0020] Preferably, the protrusion further includes an annular protrusion, and the through hole is located inside the annular protrusion and is coaxial with the annular protrusion.
[0021] Preferably, in the end of the insulating base close to the second plug core, a slot is provided between adjacent two rows of through holes. The annular protrusion is located at the end of the insulating base close to the second plug core, and the T-shaped protrusion is located at the end of the insulating base close to the first plug core.
[0022] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The following further describes the present invention in detail with reference to the drawings, where:
[0024] Figure 1 is an exploded view of the self-shorting aviation plug of the present invention;
[0025] Figure 2 is a schematic view of the self-shorting aviation plug of the present invention;
[0026] Figure 3 is a schematic view of the second plug core in the self-shorting aviation plug of the present invention;
[0027] Figure 4 is a reverse schematic view of the second plug core in the self-shorting aviation plug of the present invention;
[0028] Figure 5 This is a reverse schematic view of the first core in the self-shorting aviation plug of the present invention;
[0029] Figure 6 This is a schematic view of the insulating seat in the self-shorting aviation plug of the present invention;
[0030] Figure 7 This is a reverse schematic view of the insulating seat in the self-shorting aviation plug of the present invention;
[0031] Figure 8 This is a schematic view of the fixing member in the self-shorting aviation plug of the present invention;
[0032] Figure 9 This is a schematic view of the mounting shell in the self-shorting aviation plug of the present invention;
[0033] Figure 10 This is a schematic view of the elastic seal in the self-shorting aviation plug of the present invention;
[0034] Figure 11 This is a schematic view of the rotating member in the self-shorting aviation plug of the present invention.
Detailed Implementation Modes
[0035] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention and not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.
[0036] In the following description, terms such as "inner", "outer", "upper", "lower", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be construed as a limitation to the present invention.
[0037] Such as Figures 1 to 11As shown in the figure, the preferred structure of the self-short-circuiting aviation plug with good sealing performance in this embodiment includes a first pin 1 and a second pin 2 for plugging with the first pin 1. A plug tube 3 is provided inside the first pin 1, and a pin 4 for plugging inside the plug tube 3 is provided inside the second pin 2. The self-short-circuiting aviation plug further includes an insulating seat 5, a mounting shell 6, an outer shell 7, a rotating member 8, and a torsion spring 9. The insulating seat 5 is plugged inside the second pin 2. The insulating seat 5 is provided with through holes for inserting the plug tube 3 and the pin 4. Along the length direction of the insulating seat 5, there are multiple through holes, and a protrusion for increasing the creepage distance is provided between each adjacent two through holes. The protrusion includes a T-shaped protrusion 10. The mounting shell 6 is an annular mounting shell 6. The mounting shell 6 is provided with an annular mounting plate on its inner surface in the circumferential direction. A peripheral edge is provided outside the first pin 1, and the connection between the peripheral edge and the mounting plate is detachable. The second pin 2 is fixed inside the outer shell 7. One side of the mounting shell 6 along its axis is connected to the first pin 1, and the other side is fixedly connected to the outer shell 7. An epoxy resin layer for sealing is filled between the outer surface of the plug tube 3 and the inner surface of the first pin 1. The self-short-circuiting aviation plug seals the gap between the plug tube 3 and the inner surface of the first pin 1 through the epoxy resin layer to prevent gas from flowing out of the gap between the plug tube 3 and the inner surface of the first pin 1. The rotating member 8 is provided with a positioning groove 13. One of the mounting shell 6 and the outer shell 7 is rotatably connected to the rotating member 8, and the other is provided with a latching protrusion 14 for latching with the positioning groove 13. One end of the torsion spring 9 is relatively fixed to the mounting shell 6 or the outer shell 7, and the other end is relatively fixed to the rotating member 8. When the rotating member 8 is forced to rotate, the torsion spring 9 is deformed under force, the positioning groove 13 moves away from the latching protrusion 14, and the outer shell 7 is separated from the mounting shell 6. When the rotating member 8 is not under force, the rotating member 8 rotates under the elastic action of the torsion spring 9, and the positioning groove 13 is latched with the latching protrusion 14.
[0038] In the prior art, the creepage distance refers to the shortest path measured along the insulating surface between two conductive components or between a conductive component and the equipment protection interface. After adding the protrusion, the path of the creepage distance between two adjacent pins 4 needs to pass through the surface of the insulating seat 5 and the surface of the protrusion, thereby increasing the path length and further increasing the creepage distance to prevent equipment damage and danger.
[0039] Based on the above structure, since the conductive part of the plug tube 3 is inside and the conductive part of the pin 4 is outside, it is easy for the pin 4 to leak electricity. The insulating seat 5 is plugged inside the lower shell and wraps the pin 4 inside, which can reduce the interference between adjacent pins 4 that can be located inside the through holes. The protrusion can increase the creepage distance of the part of the pin 4 that is not located inside the through hole, further reducing the interference between adjacent pins 4.
[0040] Based on the above structure, when the protrusion is T-shaped, it can block along the length direction of the insulating base 5 to increase the creepage distance, and can also block along the width direction of the insulating base 5 to increase the creepage distance. This can prevent the situation where when there is only a protrusion blocking along the length direction of the insulating base 5, the path length from one pin 4 to another pin 4 passing through both ends of the protrusion is less than the path when passing through the surface of the protrusion, resulting in a relatively small increase in the creepage distance. At the same time, it can prevent the situation where when the length of the protrusion along the width direction of the insulating base 5 is relatively short due to position limitations, it will further reduce the degree of increase in the creepage distance.
[0041] Based on the above structure, in the prior art, the commonly used sealing structure is to directly use a sealant for sealing, and the sealing effect is poor. With the above structure, the aviation plug is sealed by the epoxy resin layer filled between the outer surface of the socket tube 3 and the inner surface of the first insert core 1, which can prevent inert gas from flowing out of the socket, thereby improving the sealing effect of the aviation plug.
[0042] Based on the above structure, in the prior art, the socket part of the aviation plug is fixed inside an object. With the above structure, when the aviation plug is disassembled, the first insert core 1 can be located inside the object, and the second insert core 2 can be disassembled and assembled relative to the first insert core 1. After the first insert core 1 is disassembled, the first insert core 1 can prevent gas from flowing out through the epoxy resin layer, enabling the second insert core 2 to be freely disassembled and assembled without gas flowing out, making it very convenient for the staff to install and repair the aviation plug.
[0043] Based on the above structure, during disassembly, the user applies a force to the rotating member 8 to control the rotating member 8 to rotate outward with the rotating protrusion as the axis, and the engaging protrusion 14 is separated from the positioning groove 13, and the torsion spring 9 is deformed by the force. During installation, the user releases the rotating member 8 without applying a force to the rotating member 8, and the rotating member 8 rotates in the reverse direction under the action of the torsion spring 9, and the engaging protrusion 14 is re-engaged and fixed with the positioning groove 13, enabling the user to disassemble and assemble the outer shell 7 more conveniently.
[0044] In order to further optimize the position of the epoxy resin layer, in this embodiment, it is preferably provided that the first insert core 1 is provided with a wire fixing hole, the surface of the epoxy resin layer is higher than the wire fixing hole and lower than the surface of the peripheral edge close to the mounting shell 6. The surface of the epoxy resin layer being higher than the wire fixing hole can prevent external gas from flowing into the first insert core 1 through the wire fixing hole when the epoxy resin layer is relatively low and then flowing out from the inside of the aviation plug. And the surface of the epoxy resin layer being lower than the surface of the peripheral edge close to the mounting shell 6 can prevent the epoxy resin from overflowing when the second insert core 2 is inserted into the first insert core 1.
[0045] In order to enhance the sealing effect between the first ferrule 1 and the installation shell 6, in this embodiment, it is preferably provided that there is a fixing member 11 between the first ferrule 1 and the installation shell 6. The fixing member 11 is annular, and an annular groove is provided inside it. The opening direction of the groove faces the center of the ring. The peripheral edge is located in the groove. The peripheral edge, the fixing member 11 and the mounting plate are connected by screws. First, the peripheral edge of the first ferrule 1 is installed in the annular groove of the fixing member 11, and then the first ferrule 1 and the fixing member 11 are placed on the mounting plate. The first ferrule 1 and the fixing member 11 are fixed by screws passing through the fixing member 11, the peripheral edge and the mounting plate at the same time, so that the first ferrule 1 can be in contact with multiple surfaces of the fixing member 11, preventing the sealing effect from being poor due to the unevenness of the surface when only one surface is in contact. Contact through multiple surfaces can be complementary. When one surface is uneven, it can be sealed by other surfaces, thereby increasing the sealing effect between the first ferrule 1 and the installation shell 6. Secondly, since the peripheral edge of the first ferrule 1 is usually a plastic part and has a relatively large surface roughness when contacting the mounting plate, and the fixing member 11 can be set as a metal part with a relatively small surface roughness, so that when the surface of the fixing member 11 contacts the surface of the mounting plate, a better sealing effect can be achieved.
[0046] Wherein, the fixing member 11 can be provided with a plurality of screw holes for screw fixation in the circumferential direction. Fixing is carried out through a plurality of screws, so that multiple positions of the fixing member 11 in the circumferential direction can be fixed to the mounting plate, preventing the fixing member 11 from moving due to insecure fixation and causing a gap between the fixing member 11 and the mounting plate, which affects the sealing effect.
[0047] In order to enable the surface of the peripheral edge parallel to the axis of the peripheral edge to be in close contact with the surface of the groove, in this embodiment, it is preferably provided that the fixing member 11 is an elastic member. There is an interference fit between the surface of the peripheral edge in its circumferential direction and the bottom surface of the groove in its circumferential direction. Since the opening direction of the groove faces the center of the ring, the bottom surface of the groove refers to the surface parallel to the axis of the annular groove, that is, the surface opposite to the groove opening. And the fixing member 11 is an elastic member, and there is an interference fit between the surface of the peripheral edge in its circumferential direction and the bottom surface of the groove in its circumferential direction, so that the fixing member 11 can be sleeved on the peripheral edge through elastic deformation and be in close contact with the surface of the peripheral edge parallel to the axis of the peripheral edge, thereby further increasing the sealing effect between the first ferrule 1 and the installation shell 6.
[0048] In order to enable the surfaces perpendicular to the peripheral edge axis on the peripheral edge to be in close contact with the groove surfaces, in this embodiment, it is preferably that there is an interference fit between the two surfaces perpendicular to its axis on the groove and the two surfaces perpendicular to its axis on the peripheral edge, and there is an interference fit between the surface perpendicular to its axis of the fixing member 11 and the surface of the mounting plate. By tightening the screw, the elastic fixing member 11 undergoes elastic deformation and contacts the peripheral edge and the mounting plate, so that the surfaces perpendicular to the peripheral edge axis on the peripheral edge can be in close contact with the groove surfaces, and at the same time, the surface perpendicular to its axis of the fixing member 11 can be in close contact with the surface of the mounting plate, thereby further increasing the sealing effect between the first plug core 1 and the mounting shell 6.
[0049] In addition, in order to achieve further sealing, in this embodiment, it is preferably that a limiting plate 12 for sealing is sleeved outside the second plug core 2. Along the axis direction of the mounting shell 6, the limiting plate 12 can seal again to further prevent gas from flowing out of the aviation plug. The limiting plate 12 is fixed inside the outer shell 7. The limiting plate 12 is provided with an annular positioning plate, and the outer surface of the annular positioning plate is provided with fixing protrusions. There is an interference fit between the surface of the fixing protrusions and the inner surface of the mounting shell 6. The fixing protrusions are provided with guiding inclined surfaces for convenient installation. The limiting plate 12 can contact the inner surface of the mounting shell 6 through the annular positioning plate, thereby further restricting the flow of epoxy resin and preventing the epoxy resin from flowing out of the gap between the outer shell 7 and the mounting shell 6. At the same time, during installation, positioning can be carried out through the annular positioning plate, making the installation of the limiting plate 12 more convenient. Through the fixing protrusions, the limiting plate 12 can deform during installation, making it fixed more firmly. Through the guiding inclined surfaces, the limiting plate 12 can be more easily installed on the mounting shell 6.
[0050] In order to increase the sealing effect between the outer shell 7 and the mounting shell 6, in this embodiment, it is preferably that an elastic sealing member 15 is provided between the outer shell 7 and the mounting shell 6. Through the elastic sealing member 15, the sealing effect between the outer shell 7 and the mounting shell 6 can be increased, further increasing the sealing effect of the aviation plug, and at the same time, it can prevent the epoxy resin from flowing into the gap between the outer shell 7 and the mounting shell 6 or flowing out of the gap between the outer shell 7 and the mounting shell 6.
[0051] Wherein, the mounting shell 6 is provided with a limiting protrusion for limiting the elastic sealing member 15, and the elastic sealing member 15 is provided with a limiting groove for engaging with the limiting protrusion. The opening direction of the limiting groove faces the axis direction of the mounting shell 6. By engaging the limiting protrusion with the limiting groove, the elastic sealing member 15 can be more stably installed on the mounting shell 6, preventing the elastic sealing member 15 from slipping off, and further making the fixing between the outer shell 7 and the mounting shell 6 more firm.
[0052] To optimize the structure of the insulating base 5, in this embodiment, it is preferred that the pins 4 are provided in multiple rows along the width direction of the lower case. The distance between two adjacent rows is greater than the creepage distance between two adjacent through holes in each row. The total number of pins 4 in each row is greater than the total number of rows of pins 4. To increase the number of pins 4, usually the number of rows of pins 4 is increased along the width direction of the lower case. To prevent interference between the pins 4 in two adjacent rows, the width of the insulating base 5 can be increased, so that the distance between every two rows of through holes can be increased, thereby increasing the creepage distance. Since the number of rows is small, the increase in the width of the insulating base 5 is small, and there are many pins 4 in each row. If the distance between the pins 4 is increased to increase the creepage distance, it will result in a long length of the insulating base 5, which is not convenient for production, processing, and use. By providing the protrusions, the creepage distance between two adjacent pins 4 in each row can be increased, and the length of the insulating base 5 will not be too large, which is convenient for production and processing. At the same time, no protrusions need to be provided between each row, which can reduce the processing difficulty.
[0053] Among them, the difference between the total number of pins 4 in each row and the total number of rows of pins 4 is at least 8, that is, the difference between the total number of through holes in each row and the total number of rows of through holes is at least. At this time, if the distance between the pins 4 is increased to increase the creepage distance, it will result in a long length of the insulating base 5, wasting materials and being not convenient for production and processing.
[0054] To optimize the position of the T-shaped protrusion 10, in this embodiment, it is preferred that the T-shaped protrusion 10 includes a transverse protrusion along the length direction of the lower case and a longitudinal protrusion along the width direction of the lower case. The longitudinal protrusion is located between two adjacent through holes. The transverse protrusion is connected to the longitudinal protrusion and is located on the side of the longitudinal protrusion close to the outside of the insulating base 5. To increase the creepage distance between two adjacent rows, usually the width of the insulating base 5 can be increased, so that there will be a certain distance between each row of through holes on the insulating base 5. When there are only two rows of through holes, each row of through holes is located on both sides of the insulating base 5 along the width direction respectively to ensure that there is enough distance between the two rows of through holes. At this time, although there are protrusions between two adjacent through holes in each row, since the through holes are close to the edge, the path of the creepage distance will pass through one end of the protrusion close to the outside of the insulating base 5 and cannot pass through the surface of the protrusion, resulting in the protrusion being ineffective. The transverse protrusion of the T-shaped protrusion 10 can block the edge of the through hole, so that when the creepage distance needs to reach the adjacent through hole through the outer edge of the insulating base 5, it needs to pass through the surface of the transverse protrusion first, thereby increasing the path length and preventing the path for calculating the creepage distance from being the path passing through the outer edge of the insulating base 5 to reach the adjacent through hole.
[0055] To make the path for calculating the creepage distance be the path passing through the longitudinal protrusion surface, in this embodiment, it is preferred that in the adjacent two through holes, when going from one through hole to the other, the length of the shortest path passing through the surface of the insulating base 5 and the longitudinal protrusion surface is greater than or equal to the length of the shortest path passing through the surface of the insulating base 5 and the end of the longitudinal protrusion away from the transverse protrusion, and is greater than or equal to the length of the shortest path passing through the surface of the insulating base 5 and the transverse protrusion surface. Thus, the path length passing through the longitudinal protrusion surface is the shortest and can be used as the path for calculating the creepage distance, so that the protrusion can play the role of increasing the distance, and the increasing effect is better.
[0056] Among them, the distance between adjacent two through holes in each row is equal, and the center position of the transverse protrusion is connected to the longitudinal protrusion, so that the positions of the through holes and the shape of the T-shaped protrusion 10 are more regular and accurate, making it more convenient to process the insulating base 5.
[0057] To optimize the structure of the protrusion, in this embodiment, it is preferred that the protrusion further includes an annular protrusion 16, and the through hole is located inside the annular protrusion 16 and is coaxial with the annular protrusion 16. At this time, the creepage distance between two adjacent pins 4 must pass through the protrusion surface between the two pins 4, preventing the path for calculating the creepage distance from passing through the ends of the protrusion instead of the protrusion surface, resulting in a poor effect of increasing the creepage distance. At the same time, the creepage distance between two adjacent rows can also be increased through the annular protrusion 16, so that it is not necessary to increase the width of the insulating base 5 to increase the creepage distance, which causes inconvenience in production and processing.
[0058] To further optimize the position of the protrusion on the insulating base 5, in this embodiment, it is preferred that in the end of the insulating base 5 close to the second insert core 2, a slot 17 is provided between adjacent two rows of through holes. The annular protrusion 16 is located at the end of the insulating base 5 close to the second insert core 2, and the T-shaped protrusion 10 is located at the end of the insulating base 5 close to the first insert core 1. Due to the existence of the slot 17, when the T-shaped protrusion 10 is set, the length of the longitudinal protrusion is short, and it cannot be ensured that the path for calculating the creepage distance must pass through the surface of the longitudinal protrusion, so that when the path for calculating the creepage distance passes through the end of the longitudinal protrusion close to the inside of the insulating base 5, the effect of increasing the creepage distance is poor.
[0059] Among them, one of the insulating base 5 and the second insert core 2 is provided with a positioning protrusion, and the other is provided with a first positioning groove for engaging with the positioning protrusion. By the way of engaging the positioning protrusion and the first positioning groove, the insulating base 5 can be positioned relative to the second insert core 2. One of the insulating base 5 and the first insert core 1 is provided with a positioning block, and the other is provided with a second positioning groove for engaging with the positioning block. By the way of engaging the positioning block and the second positioning groove, the insulating base 5 can be positioned relative to the first insert core 1.
[0060] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.
Claims
1. A self-shorting aviation plug, comprising a first plug core and a second plug core for being inserted and installed with the first plug core. A plug tube is arranged inside the first plug core, and a plug pin for being inserted and installed inside the plug tube is arranged inside the second plug core. It is characterized in that: The self-shorting aviation plug further includes an insulating seat, a mounting shell, an outer shell, a rotating member, and a torsion spring. The insulating seat is inserted into the second core. The insulating seat is provided with through holes for inserting the plug tube and the pin. Along the length direction of the insulating seat, there are multiple through holes, and between each adjacent two through holes, there is a protrusion for increasing the creepage distance. The protrusion includes a T-shaped protrusion. The mounting shell is an annular mounting shell. The inner surface of the mounting shell is provided with an annular mounting plate in the circumferential direction. The outer part of the first core is provided with a peripheral edge, and the connection between the peripheral edge and the mounting plate is detachable. The second core is fixed inside the outer shell. One side of the mounting shell along its axial direction is connected to the first core, and the other side is fixedly connected to the outer shell. An epoxy resin layer for sealing is filled between the outer surface of the plug tube and the inner surface of the first core. The self-shorting aviation plug seals the gap between the plug tube and the inner surface of the first core through the epoxy resin layer to prevent gas from flowing out from the gap between the plug tube and the inner surface of the first core. The rotating member is provided with a positioning groove. One of the mounting shell and the outer shell is rotatably connected to the rotating member, and the other is provided with a engaging protrusion for engaging with the positioning groove. One end of the torsion spring is relatively fixed to the mounting shell or the outer shell, and the other end is relatively fixed to the rotating member. When the rotating member is forced to rotate, the torsion spring is deformed by the force, the positioning groove moves away from the engaging protrusion, and the outer shell separates from the mounting shell. When the rotating member is not stressed, the rotating member rotates under the elastic action of the torsion spring, and the positioning groove engages with the engaging protrusion.
2. The self-shorting aviation plug according to claim 1, characterized in that: The first core is provided with a wire fixing hole. The surface of the epoxy resin layer is higher than the wire fixing hole and lower than the surface of the peripheral edge near the mounting shell.
3. A self-shorting aviation plug according to claim 1, characterized in that: A fixing member is provided between the first core and the mounting shell. The fixing member is annular, and its inner part is provided with an annular groove. The opening direction of the groove faces the center of the ring. The peripheral edge is located in the groove, and the connection between the peripheral edge, the fixing member, and the mounting plate is by screws.
4. The self-shorting navigation plug according to claim 3, characterized in that: The fixing member is an elastic member, and there is an interference fit between the surface of the peripheral edge along its circumferential direction and the bottom surface of the groove along its circumferential direction.
5. The self-short-circuiting aviation plug according to claim 4, characterized in that: There is an interference fit between the two surfaces perpendicular to the axis of the groove and the two surfaces perpendicular to the axis of the peripheral edge, and there is an interference fit between the surface of the fixing member perpendicular to its axis and the surface of the mounting plate.
6. A self-shorting aviation plug according to claim 1, characterized in that: An elastic sealing member is provided between the outer shell and the mounting shell.
7. A self-shorting aviation plug according to claim 1, characterized in that: The pins are arranged in multiple rows along the width direction of the lower shell. The distance between adjacent two rows is greater than the creepage distance between adjacent two through holes in each row. The total number of pins in each row is greater than the total number of rows of pins. The T-shaped protrusion includes a transverse protrusion along the length direction of the lower shell and a longitudinal protrusion along the width direction of the lower shell. The longitudinal protrusion is located between adjacent two through holes, and the transverse protrusion is connected to the longitudinal protrusion and is located on the side of the longitudinal protrusion close to the outside of the insulating seat.
8. The self-shorting aviation plug according to claim 7, characterized in that: Among the two adjacent through holes, when going from one through hole to the other, the length of the shortest path passing through the surface of the insulating seat and the surface of the longitudinal protrusion is greater than or equal to the length of the shortest path passing through the surface of the insulating seat and the end of the longitudinal protrusion away from the transverse protrusion, and is greater than or equal to the length of the shortest path passing through the surface of the insulating seat and the surface of the transverse protrusion.
9. The self-shorting pin header according to claim 8, wherein: The protrusion further includes an annular protrusion, and the through hole is located inside the annular protrusion and is coaxial with the annular protrusion.
10. A self-shorting aviation plug according to claim 9, characterized in that: In one end of the insulating seat close to the second insert core, a slot is provided between two adjacent rows of through holes. The annular protrusion is located at one end of the insulating seat close to the second insert core, and the T-shaped protrusion is located at one end of the insulating seat close to the first insert core.
Citation Information
Patent Citations
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