A connector

Abstract

This application relates to a connector, which includes a fixed end piece, an intermediate connector piece, and a movable end piece, wherein the movable end piece is detachably connected to the fixed end piece; a conductive male pin is provided on the fixed end piece, one end of the fixed end piece is provided with a plug hole for one end of the intermediate connector piece to be inserted into, and a conductive female pin for cooperating with the conductive male pin is provided inside the intermediate connector piece, and one end of the conductive female pin away from the fixed end piece is for the male pin of an electrical device to be inserted into. This application has the effect of facilitating installation.

Description

Technical Field

[0001] The present application relates to the field of wiring structures, and more particularly to a connector. Background Art

[0002] A connector is a device used to connect electrical appliances (such as LED lights) and power supply lines, and can also be divided into waterproof connectors, three-proof connectors, detachable connectors, etc. according to different uses.

[0003] Existing connectors include a fixed end piece and a movable end piece. The fixed end piece is connected to the power supply line, and according to the actual situation, the fixed end piece can also be installed on a wall, ceiling or other carriers for installing subsequent electrical appliances on the carrier; the fixed end piece has female pins, and according to the situation, a plurality of conductive female pins can be provided to respectively correspond to the neutral wire, live wire and ground wire.

[0004] During use, the male pin of the electrical appliance is inserted into the corresponding female pin of the fixed end piece, and then the movable end piece is installed on the fixed end piece. At this time, the movable end piece is sleeved outside the electrical appliance to reinforce the connection between the electrical appliance and the fixed end piece and play a certain role in waterproofing and dustproofing.

[0005] When the fixed end piece needs to be installed on a carrier that is difficult to directly install, such as a ceiling, it is difficult to install the electrical appliance and the fixed end piece, and the situation of unstable installation is likely to occur. Summary of the Invention

[0006] In order to facilitate installation, the present application provides a connector.

[0007] A connector provided by the present application adopts the following technical solutions:

[0008] A connector includes a fixed end piece, an intermediate connector and a movable end piece, wherein the movable end piece is detachably connected to the fixed end piece; the fixed end piece is provided with conductive male pins, one end of the fixed end piece is provided with a plug hole for inserting one end of the intermediate connector, and the intermediate connector is provided with conductive female pins for cooperating with the conductive male pins, and the end of the conductive female pin away from the fixed end piece is for inserting the male pin of the electrical appliance.

[0009] By adopting the above technical solutions, during use, the fixed end piece is pre-installed on a carrier, such as a ceiling, and then the male pin of the electrical appliance is inserted into the conductive female pin at one end of the intermediate connector to complete the installation of the electrical appliance and the intermediate connector. Then, climb to a height to insert the other end of the intermediate connector into the plug hole on the fixed end piece. At this time, the mating area between the two is large and the connection is relatively stable, and the form of large shaft hole alignment is relatively convenient. Finally, the movable end piece is installed on the fixed end piece to protect the electrical appliance.

[0010] In summary, the more difficult installation method of the male and female needles is to set them on the ground in advance, and then the easier and more stable large shaft holes are set at a high place to complete it, which is convenient and quick.

[0011] Optionally, the peripheral surface of the middle connector or the hole wall of the plug-in hole is provided with an anti-foolproof protrusion, which extends along the plug-in direction of the middle connector and the plug-in hole, and the hole wall of the plug-in hole or the peripheral surface of the middle connector is provided with an anti-foolproof groove for cooperating with the anti-foolproof protrusion.

[0012] By adopting the above technical solution, by setting the cooperation of the anti-foolproof protrusion and the anti-foolproof groove, when the middle connector is matched with the plug hole and the conductive male pin is not matched with the conductive female pin, the middle connector can be adjusted circumferentially to facilitate the alignment between the conductive female pin and the conductive male pin, thereby further improving the convenience and accuracy of installation.

[0013] Optionally, the circumferential surface of the middle connector is provided with accommodating grooves corresponding to the conductive female pins one by one, the conductive female pins are installed in the accommodating grooves, the accommodating grooves are evenly arranged along the virtual axis circumference of the middle connector, and the opening direction of the accommodating grooves is tangent to the virtual circle enclosed by the conductive female pins.

[0014] By adopting the above technical solution and setting the accommodating groove, the concealed installation of the conductive female pin can be realized, and by setting the arrangement position and method of the conductive female pin relative to the middle connector, the influence of the volume of the conductive female pin on the diameter of the middle connector can be reduced. It can be seen that the volume of the conductive female pin can be set larger inside the middle connector with the same diameter or external size, which is beneficial to lower current loss and improve the plug-in stability of the male and female pins.

[0015] Optionally, a bolt is threadedly connected to the conductive female pin, and the bolt is located on a side of the conductive female pin away from the fixed end piece. The axis of the bolt is tangent to a virtual circle formed by the conductive female pins; one end of the bolt extends into the inner cavity of the conductive female pin.

[0016] By adopting the above technical solution, when the male pin of the electrical device is inserted into the conductive female pin on the intermediate connector, the bolt can be tightened so that the end of the bolt is pressed tightly against the male pin of the electrical device located in the conductive female pin, that is, the male pin of the electrical device is reinforced for the second time, thereby improving the connection strength between the conductive female pin and the male pin of the electrical device; secondly, the bolt as a fastening structure has a simple structure and good effect, and ground reinforcement can also greatly reduce the impact of the long time and tedious operation of tightening the bolt.

[0017] Optionally, the intermediate connector includes a plug-in body and an end cover installed on an end of the plug-in body away from the fixed end piece, the plug-in body is provided with a groove on its circumferential surface, the groove surface of the groove and the end surface of the end cover facing the plug-in body together form the accommodating groove, the end surface of the end cover is penetrated by through holes corresponding to the conductive female pins one by one, and the through holes are connected to the accommodating groove; the end surface of the end cover facing the plug-in body is provided with an anti-slip sheet, and the anti-slip sheet is used to limit the conductive female pin from detaching from the notch of the accommodating groove.

[0018] By adopting the above technical solution, the installation of the conductive female pin is achieved through the cooperation between the plug-in body and the end cover.

[0019] Optionally, a bolt is threadedly connected to the conductive female pin, and the bolt is located on a side of the conductive female pin away from the fixed end piece, and the axis of the bolt is tangent to a virtual circle formed by the conductive female pins; one end of the bolt extends into the inner cavity of the conductive female pin; the screw head of the bolt abuts against the surface of the anti-slip plate away from the conductive female pin.

[0020] By adopting the above technical solution, the bolts are tightened to compress the anti-slip sheet, so that the connection between the conductive female pin, the end cover and the plug body is reinforced again to reduce the occurrence of loosening.

[0021] Optionally, an annular groove is provided on the hole wall of the through hole, a sealing belt is provided in the annular groove, one end of the sealing belt is fixedly connected to the end cover, and the other end of the sealing belt is a free end, and the sealing belt is arranged around the axis of the through hole; the anti-slip plate is slidably arranged with the end cover, the sliding direction of the anti-slip plate is tangential to the through hole, and the anti-slip plate is fixedly connected to the free end of the sealing belt.

[0022] By adopting the above technical solution, when the male pin of the electrical device is inserted into the conductive female pin of the intermediate connector through the through hole, the bolt is tightened at this time, and the screw head of the bolt presses down the anti-slip plate to drive the anti-slip plate to slide, and the anti-slip plate is fixedly connected to the free end of the sealing belt, thereby driving the free end of the sealing belt to move along the tangential direction of the through hole, thereby forcing the surrounding part of the sealing belt to shrink so as to tightly cover the male pin of the electrical device. In this way, the sealing belt can block the gap between the through hole of the end cover and the male pin of the electrical device, thereby reducing the entry of external water vapor or dust into the matching position between the conductive female pin and the male pin of the electrical device to reduce the occurrence of short circuit.

[0023] At the same time, the elastic reaction force of the sealing tape will be applied to the bolt through the anti-slip sheet to reduce the thread gap between the bolt and the conductive female pin to reduce the loosening of the bolt.

[0024] Optionally, the cross section of the sealing belt is an isosceles trapezoid, the narrow side surface of the sealing belt is arranged toward the axis of the through hole, and the cross section of the annular groove is adapted to the cross section of the sealing belt.

[0025] By adopting the above technical scheme, when the sealing tape is gathered around the part to tightly cover the male pin of the electrical device, due to the cross-sectional setting of the sealing tape, an interference fit will occur between the sealing tape and the notch of the annular groove. On the one hand, the sealing effect can be improved to reduce the occurrence of external water vapor entering the conductive female pin through the notch gap of the annular groove; on the other hand, since the notch of the annular groove is a narrowing structure, and as the sealing tape is gathered, the volume of the sealing tape passing through the notch of the annular groove gradually increases, the narrowed notch will be embedded in the sealing tape to form a self-locking, which can greatly improve the wrapping effect and stability of the sealing tape.

[0026] Optionally, a sealing strip is embedded in the notch of the accommodating groove, and when one end of the plug-in body is inserted into the plug-in hole, the side surface of the sealing strip presses against the hole wall of the plug-in hole.

[0027] By adopting the above technical solution, a sealing strip is set to seal the notch of the receiving groove to reduce the intrusion of external water vapor into the receiving groove, and the sealing strip and the plug-in hole are fitted with an interference fit, which can improve the installation stability between the intermediate connector and the plug-in hole.

[0028] Optionally, a spring sheet is embedded in the outer surface of the sealing strip, and the spring sheet is arranged along the length direction of the sealing strip. The spring sheet is provided with a plurality of long holes extending along its own length direction, and the long holes are arranged at intervals along the width direction of the spring sheet, and part of the structure of the outer surface of the sealing strip is embedded in the long holes; the length direction of the sealing strip is inclined relative to the axial direction of the plug-in body, and the shortest distance between the sealing strip and the axis of the plug-in body gradually increases from the direction away from the fixed end piece; a protrusion is fixed to the side of the anti-slip sheet, and the end of the sealing strip away from the fixed end piece is an arc end, and the arc end simultaneously abuts against the end face of the end cover and the surface of the protrusion.

[0029] By adopting the above technical solution, when the plug-in body is inserted into the plug-in hole, the edge of the hole opening of the plug-in hole will squeeze the inclined spring sheet, thereby being able to more easily force the sealing strip to move along the axial direction close to the plug-in body. At this time, the arc end of the sealing strip squeezes the protrusion on the anti-slip sheet, thereby driving the anti-slip sheet to slide, so as to further force the tightening of the sealing belt, thereby further strengthening the wrapping effect.

[0030] Furthermore, since part of the structure of the outer surface of the sealing strip is embedded in the long hole, part of the structure of the sealing strip can be exposed to directly elastically contact with the edge of the hole of the plug hole, thereby ensuring the tightness of the contact and the installation stability of the plug body.

[0031] Moreover, the arrangement of the elastic piece also makes the sealing strip more tightly clamped at the notch of the receiving groove.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. By providing the middle connector, which can be inserted and cooperated with the fixed end piece, the difficult installation method of the male and female pins is set to be completed in advance on the ground, while the relatively easy and stable large shaft hole can be set to be completed at a high place, which is convenient and fast;

[0034] 2. By setting the arrangement position and method of the conductive female pins relative to the middle connector, the influence of the volume of the conductive female pins on the diameter of the middle connector can be reduced, which is beneficial to lower power loss of the current and improve the insertion stability of the male and female pins;

[0035] 3. By providing the sealing belt that is linked and cooperated with the bolt, and tightly covering the male pin of the electrical device with the sealing belt, the sealing belt can block the gap between the through hole of the end cover and the male pin of the electrical device, so as to reduce the entry of external moisture or dust into the mating position between the conductive female pin and the male pin of the electrical device, thereby reducing the occurrence of short circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of Embodiment 1.

[0037] Figure 2 is an exploded view of the overall structure of Embodiment 1.

[0038] Figure 3 is a schematic diagram of the structure of the conductive male pin of Embodiment 1.

[0039] Figure 4 is an exploded view of the structure of the middle connector of Embodiment 1.

[0040] Figure 5 is an exploded view of Embodiment 1 for showing the cooperation relationship between the conductive female pin and the plugging main body.

[0041] Figure 6 is a schematic diagram of the middle connector of Embodiment 2.

[0042] Figure 7 is a partial cross-sectional view of the end cover of Embodiment 2.

[0043] Figure 8 is a cross-sectional view of Embodiment 2 for showing the cooperation relationship between the sealing belt and the annular groove.

[0044] Figure 9 is an exploded view of Embodiment 3 for showing the cooperation relationship between the sealing strip and the plugging main body.

[0045] Description of reference numerals: 1. Fixed end piece; 2. Movable end piece; 3. Intermediate connecting piece; 10. Insertion hole; 11. Intermediate partition; 12. First threaded tube; 13. Second threaded tube; 14. Conductive male pin; 141. Avoidance groove; 15. Anti-fooling protrusion; 21. Protective housing; 22. Screw cap; 23. Third threaded tube; 24. Deformable clamping jaw; 25. Rubber ring; 26. Inclined surface; 31. Insertion main body; 311. Female clamping part; 312. Accommodation groove; 313. Anti-fooling groove; 32. End cover; 321. Male clamping part; 322. Anti-disengagement piece; 323. Through hole; 324. Slide groove; 325. Ring groove; 326. Connecting rod; 327. Protruding part; 33. Conductive female pin; 34. Bolt; 35. Sealing strip; 36. Sealing strip; 361. Arc end; 37. Elastic piece; 371. Long hole; 372. Tooth groove. Detailed implementation mode

[0046] The following further elaborates on this application in conjunction with the attached Figures 1-9 drawings for a more detailed description.

[0047] Embodiment 1 of this application discloses a connector.

[0048] Referring to Figure 1 and Figure 2 , the connector includes a fixed end piece 1, an intermediate connecting piece 3 and a movable end piece 2. The fixed end piece 1 can be installed on a wall, ceiling or other carrier for installing subsequent electrical appliances on the carrier; the intermediate connecting piece 3 is used to be pre-connected with the electrical appliance first, and then through the cooperation of the intermediate connecting piece 3 and the fixed end piece 1, the connection between the electrical appliance and the fixed end piece 1 is realized; then the movable end piece 2 is installed on the fixed end piece 1 to protect and reinforce the electrical appliance.

[0049] As Figure 2 and Figure 3 shown, the fixed end piece 1 includes an intermediate partition 11. On both sides of the intermediate partition 11, a first threaded tube 12 and a second threaded tube 13 are integrally formed along the axial direction. The first threaded section is used to be fixed to the pre-installed connection structure in the carrier, and the connection structure can be a nut or the like to install the fixed end piece 1 on the carrier.

[0050] The inner cavity of the second threaded tube 13 is set as an insertion hole 10. A plurality of conductive male pins 14 are provided on the intermediate partition 11. In this embodiment, three conductive male pins 14 are provided, corresponding to the neutral wire, live wire and ground wire respectively; both ends of the conductive male pin 14 extend into the inner cavities of the first threaded tube 12 and the second threaded tube 13 respectively. The end of the conductive male pin 14 located in the first threaded tube 12 can be fixedly connected to the corresponding wire. An avoidance groove 141 is formed at the end of the conductive male pin 14 located in the second threaded tube 13. The avoidance groove 141 extends along the axial direction of the conductive male pin 14, so that this end has deformability for subsequent interference fit.

[0051] like Figure 4 , Figure 5 As shown, the middle connector 3 includes a plug body 31 and an end cover 32. The plug body 31 is a columnar body. The plug body 31 is provided with conductive female pins 33 corresponding to the conductive male pins 14. One side of the conductive female pins 33 is a plane, and the other side of the conductive female pins 33 is a semicircular arc surface. The circumferential surface of the plug body 31 is provided with grooves corresponding to the conductive female pins 33. One end of the groove passes through the axial direction of the plug body 31 to the end surface of the plug body 31. The conductive female pins 33 are located in the grooves, and the plane side of the conductive female pins 33 is exposed at the notch of the groove.

[0052] Three snap-fit ​​sub-components 321 are provided on the outer periphery of the end cover 32, and a corresponding snap-fit ​​mother component 311 is provided at the outer edge of the end of the plug-in body 31. Through the snap-fit ​​cooperation between the snap-fit ​​sub-components 321 and the snap-fit ​​mother component 311, the end cover 32 can be installed and fixed to one end of the plug-in body 31. At this time, the end face of the end cover 32 blocks one end of the groove, that is, the groove surface of the groove and the end face of the end cover 32 facing the plug-in body 31 jointly form a receiving groove 312 to accommodate the conductive female pin 33; and an anti-slip sheet 322 is provided on the plug-in body 31 and / or the end cover 32. The anti-slip sheet 322 is located at the notch of the receiving groove 312 to limit the conductive female pin 33 from detaching from the receiving groove 312.

[0053] like Figure 5 As shown, the receiving grooves 312 are evenly arranged along the virtual axis of the middle connector 3 , and the opening direction of the receiving grooves 312 is tangent to the virtual circle formed by the conductive female pins 33 , so as to reasonably utilize the space of the plug body 31 .

[0054] The plug body 31 is provided with a hole axially therethrough, which is connected to the inner cavity of the conductive female pin 33. The end surface of the end cover 32 is provided with a through hole 323 corresponding to the conductive female pin 33, so that the external male pin can cooperate with the conductive female pin 33 through the hole and the through hole 323.

[0055] The male pin of the electrical component can pass through the through hole 323 and cooperate with the conductive female pin 33 , thereby achieving installation between the electrical component and the intermediate connector 3 .

[0056] A bolt 34 is also threadedly connected to the conductive female pin 33. The bolt 34 is located on the side of the conductive female pin 33 away from the fixed end piece 1. The axis of the bolt 34 is tangent to the virtual circle formed by the conductive female pins 33. When the male pin of the electrical component passes through the through hole 323 and cooperates with the conductive female pin 33, one end of the bolt 34 extends into the inner cavity of the conductive female pin 33 and abuts against the male pin of the electrical component to limit the male pin of the electrical component by friction.

[0057] One end of the insertion main body 31 away from the end cover 32 can be inserted into the insertion hole 10. During this process, the conductive male pin 14 also passes through the hole on the insertion main body 31 and is inserted into the conductive female pin 33, so as to realize the direct installation between the middle connection part 3 and the fixed end part 1, and the indirect installation between the electrical appliance part and the fixed end part 1.

[0058] In order to improve the alignment accuracy, as Figure 2 、 Figure 5 shown, the inner wall of the insertion hole 10 is convexly provided with an anti-fooling protrusion 15. The anti-fooling protrusion 15 is arranged along the axial direction of the insertion hole 10. The end of the anti-fooling protrusion 15 is relatively close to the orifice of the insertion hole 10 compared with the end of the conductive male pin 14. The circumferential surface of the insertion main body 31 is provided with an anti-fooling groove 313. By setting the cooperation of the anti-fooling protrusion 15 and the anti-fooling groove 313, the middle connection part 3 can be adjusted circumferentially, so as to facilitate the alignment between the conductive female pin 33 and the conductive male pin 14, and further improve the installation convenience and accuracy.

[0059] As Figure 2 shown, the movable end part 2 includes a protective housing 21 and a rotary cover 22. The protective housing 21 is a hollow tubular structure. The inner wall of one end of the protective housing 21 is provided with an internal thread, and this internal thread can cooperate with the second threaded pipe 13 to realize the installation of the protective housing 21 and the fixed end part 1. At this time, the protective housing 21 is sleeved outside the electrical appliance part to protect the electrical appliance part.

[0060] One end of the protective housing 21 away from the fixed end part 1 is integrally formed with a third threaded pipe 23. The rotary cover 22 can be threadedly connected with the third threaded pipe 23, and the rotary cover 22 can further protect the electrical appliance part to reduce the situation that external water vapor invades from one end of the protective housing 21.

[0061] Moreover, one end of the third threaded pipe 23 away from the protective housing 21 is integrally formed with a plurality of deformation clamping claws 24. The deformation clamping claws 24 are arranged at equal intervals along the circumferential direction of the third threaded pipe 23. A rubber ring 25 is coaxially placed within the circular area formed by enclosing the deformation clamping claws 24. The inner wall of one end of the rotary cover 22 away from the protective housing 21 is provided with an inclined surface 26. When the rotary cover 22 is screwed tightly, the inclined surface 26 uniformly abuts against each deformation clamping claw 24, so as to force the deformation clamping claws 24 to deflect towards the axis direction of the third threaded pipe 23, so as to jointly force the rubber ring 25 to tighten. The tightened rubber ring 25 is more tightly fastened to the electrical appliance part to prevent external water vapor from invading the inside of the protective housing 21 through the gap between the electrical appliance part and the protective housing 21.

[0062] The implementation principle of Example 1 is as follows: when in use, the fixed end piece 1 is pre-installed on a carrier, such as a ceiling, and then when it is on the ground or in a low place, the male pin of the electrical device (such as an LED lamp) is inserted into one end of the conductive female pin 33 at one end of the middle connector 3 to complete the installation of the electrical device and the middle connector 3, and then climb up to insert the other end of the middle connector 3 into the plug hole 10 on the fixed end piece 1. At this time, the end of the conductive female pin 33 of the middle connector 3 away from the male pin of the electrical device cooperates with the conductive male pin 14 on the fixed end piece 1, and finally the protective shell 21 and the screw cover 22 are installed on the fixed end piece 1 in sequence to achieve a protective effect.

[0063] Compared with the prior art, this embodiment is completed in advance by arranging the male and female pins that are more difficult to install (the male pin of the electrical device (such as an LED lamp) is inserted into one end of the conductive female pin 33 at one end of the middle connector 3) on the ground, and then arranging the relatively easy and stable large shaft hole (the other end of the middle connector 3 is inserted into the plug hole 10 on the fixed end piece 1, and the matching area of ​​the two is larger) at a high place, which is convenient and quick.

[0064] Example 2, based on Example 1, the following settings are made: Figure 6 As shown, a slide groove 324 is provided on the end face of the end cover 32 facing the plug-in body 31, and the opening direction of the slide groove 324 is tangent to the through hole 323. The anti-slip sheet 322 slides in cooperation with the slide groove 324, and the screw head of the bolt 34 abuts against the surface of the anti-slip sheet 322 away from the conductive female pin 33, that is, the anti-slip sheet 322 can be driven to slide by tightening the bolt 34.

[0065] like Figure 7 , Figure 8 As shown, the hole wall of the through hole 323 is provided with an annular groove 325 arranged around the axis of the through hole 323, and a sealing belt 35 is arranged in the annular groove 325. The sealing belt 35 is made of rubber, and the cross-section of the sealing belt 35 is an isosceles trapezoid. The narrow side of the sealing belt 35 is arranged toward the axis of the through hole 323, and the cross-section of the annular groove 325 is adapted to the cross-section of the sealing belt 35, that is, the inner diameter portion of the sealing belt 35 can extend into the through hole 323 through the annular groove 325.

[0066] The sealing belt 35 is arranged around the axis of the through hole 323, wherein one end of the sealing belt 35 is fixedly connected to the end cover 32, and the other end of the sealing belt 35 is a free end. The anti-slip sheet 322 is fixedly connected to the free end of the sealing belt 35 through a connecting rod 326. Figure 7 It can be known that the fixed end and the free end of the sealing belt 35 are disposed apart from each other along the tangential direction of the through hole 323 , so when the anti-slip sheet 322 drives the free end of the sealing belt 35 to move, the sealing belt 35 can be tightened.

[0067] The implementation principle of Example 2 is as follows: when the male pin of the electrical device is inserted into the conductive female pin 33 of the intermediate connector 3 through the through hole 323, the bolt 34 is tightened at this time, and the screw head of the bolt 34 presses down the anti-slip sheet 322 to drive the anti-slip sheet 322 to slide. Since the anti-slip sheet 322 is fixedly connected to the free end of the sealing belt 35, the free end of the sealing belt 35 will be driven to move along the tangential direction of the through hole 323, thereby forcing the surrounding part of the sealing belt 35 to shrink so as to tightly cover the male pin of the electrical device. In this way, the sealing belt 35 can block the gap between the through hole 323 of the end cover 32 and the male pin of the electrical device, thereby reducing the entry of external water vapor or dust into the matching position between the conductive female pin 33 and the male pin of the electrical device to reduce the occurrence of short circuit.

[0068] Furthermore, since the notch of the annular groove 325 is a narrowing structure, as the sealing belt 35 is contracted, the volume of the notch of the annular groove 325 through which the sealing belt 35 passes gradually increases, and thus the narrowed notch will be embedded in the sealing belt 35 to form a self-locking structure, thereby greatly improving the wrapping effect and stability of the sealing belt 35.

[0069] Example 3, based on Example 2, the following settings are made: Figure 9 As shown, a sealing strip 36 is embedded in the notch of the receiving groove 312. The sealing strip 36 is made of rubber and has a fan-shaped cross-section. The sealing strip 36 can be radially inserted into the notch of the receiving groove 312 along the plug-in body 31 to strengthen the seal and reduce the infiltration of external water vapor from the notch of the receiving groove 312.

[0070] The length direction of the sealing strip 36 is inclined relative to the axial direction of the plug-in body 31, and the shortest distance between the sealing strip 36 and the axis of the plug-in body 31 gradually increases from the direction away from the fixed end piece 1; a protrusion 327 is fixed to the side of the anti-slip sheet 322, and the end of the sealing strip 36 away from the fixed end piece 1 is set as an arc end 361, and the arc end 361 abuts against the end face of the end cover 32 and the surface of the protrusion 327 at the same time.

[0071] The outer surface of the sealing strip 36 is bonded and covered with a spring sheet 37, which is made of stainless steel. The spring sheet 37 is provided with a plurality of long holes 371 extending along the length direction of the sealing strip 36, and the long holes 371 are arranged at intervals along the width direction of the spring sheet 37. The long sides of the long holes 371 are provided with a plurality of tooth grooves 372 penetrating therethrough, and the tooth grooves 372 are arranged at intervals along the length direction of the long holes 371. Part of the structure of the outer surface of the sealing strip 36 is embedded in the long holes 371 and the tooth grooves 372.

[0072] The implementation principle of Embodiment 3 is as follows: When the plugging main body 31 is inserted into the plugging hole 10 to realize the cooperation between the middle connecting piece 3 and the fixed end piece 1, during the insertion of the plugging main body 31, the edge of the orifice of the plugging hole 10 will continuously squeeze the elastic piece 37 arranged obliquely along with the sealing strip 36. Thus, it is relatively easy to squeeze the sealing strip 36 and make it move and deform along the direction close to the axis of the plugging main body 31, so that the sealing strip 36 is more tightly embedded in the receiving groove 312 to improve the sealing performance. And with the deformation of the sealing strip 36, the arc end 361 of the sealing strip 36 will squeeze the protruding part 327 on the anti-disengagement piece 322, thereby driving the anti-disengagement piece 322 to continue to slide, so as to further force the tightening of the sealing belt 35, achieving the effect of further strengthening the wrapping.

[0073] Moreover, since part of the structure on the outer surface of the sealing strip 36 is embedded in the long hole 371, therefore, part of the structure of the sealing strip 36 can be exposed to make direct elastic contact with the edge of the orifice of the plugging hole 10. This elastic contact has a self-locking damping effect to more firmly hold the orifice of the plugging hole 10, so as to strengthen the installation stability of the plugging main body 31 and the fixed end piece 1.

[0074] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A connector, characterized in that: It includes a fixed end piece (1), a middle connecting piece (3) and a movable end piece (2), wherein the movable end piece (2) is detachably connected to the fixed end piece (1); a conductive male pin (14) is provided on the fixed end piece (1), one end of the fixed end piece (1) is provided with a socket hole (10), the socket hole (10) is used for inserting one end of the middle connecting piece (3), and a conductive female pin (33) for cooperating with the conductive male pin (14) is provided in the middle connecting piece (3), and the end of the conductive female pin (33) far from the fixed end piece (1) is used for inserting the male pin of an electrical device; the middle connecting piece (3) includes a socket main body (31) and an end cover (32) installed at one end of the socket main body (31) far from the fixed end piece (1), a groove is formed on the circumferential surface of the socket main body (31), and the groove surface of the groove and the end surface of the end cover (32) facing the socket main body (31) jointly form a receiving groove (312), through holes (323) corresponding to the conductive female pins (33) one by one are formed through the end surface of the end cover (32), and the through holes (323) communicate with the receiving groove (312); a retaining piece (322) is provided on the end surface of the end cover (32) facing the socket main body (31), and the retaining piece (322) is used for restricting the conductive female pin (33) from detaching from the notch of the receiving groove (312); a bolt (34) is threadedly connected to the conductive female pin (33), the bolt (34) is located on the side of the conductive female pin (33) far from the fixed end piece (1), and the axis of the bolt (34) is tangent to the virtual circle formed by the enclosing of each conductive female pin (33); one end of the bolt (34) extends into the inner cavity of the conductive female pin (33); the screw head of the bolt (34) abuts against the surface of the retaining piece (322) far from the conductive female pin (33); an annular groove (325) is formed on the hole wall of the through hole (323), a sealing strip (35) is arranged in the annular groove (325), one end of the sealing strip (35) is fixedly connected to the end cover (32), the other end of the sealing strip (35) is a free end, and the sealing strip (35) is arranged around the axis of the through hole (323); the retaining piece (322) is slidably arranged with the end cover (32), the sliding direction of the retaining piece (322) is tangent to the through hole (323), and the retaining piece (322) is fixedly connected to the free end of the sealing strip (35).

2. The connector according to claim 1, characterized in that: An anti-fooling protrusion (15) is provided on the circumferential surface of the middle connecting piece (3) or the hole wall of the socket hole (10), the anti-fooling protrusion (15) extends along the insertion direction of the middle connecting piece (3) and the socket hole (10), and an anti-fooling groove (313) for cooperating with the anti-fooling protrusion (15) is provided on the hole wall of the socket hole (10) or the circumferential surface of the middle connecting piece (3).

3. The connector according to claim 1, characterized in that: The circumferential surface of the middle connector (3) is provided with receiving grooves (312) corresponding one by one to the conductive female pins (33). The conductive female pins (33) are installed in the receiving grooves (312). Each receiving groove (312) is arranged circumferentially and uniformly along the virtual axis of the middle connector (3), and the opening direction of the receiving groove (312) is tangent to the virtual circle formed by enclosing each conductive female pin (33).

4. The connector according to claim 1 or 3, characterized in that: A bolt (34) is threadedly connected to the conductive female pin (33). The bolt (34) is located on the side of the conductive female pin (33) away from the fixed end member (1). The axis of the bolt (34) is tangent to the virtual circle formed by enclosing each conductive female pin (33); one end of the bolt (34) extends into the inner cavity of the conductive female pin (33).

5. The connector according to claim 1, characterized in that: The cross-section of the sealing strip (35) is an isosceles trapezoid. The narrow side surface of the sealing strip (35) faces the axis of the through hole (323). The cross-section of the annular groove (325) is adapted to the cross-section of the sealing strip (35).

6. The connector according to claim 1, characterized in that: A sealing strip (36) is embedded at the notch of the receiving groove (312). When one end of the plugging main body (31) is inserted into the plugging hole (10), the side surface of the sealing strip (36) presses against the hole wall of the plugging hole (10).

7. The connector according to claim 6, characterized in that: Elastic pieces (37) are embedded on the outer surface of the sealing strip (36). The elastic pieces (37) are arranged along the length direction of the sealing strip (36). The elastic pieces (37) are provided with a plurality of long holes (371) extending along their own length directions. Each long hole (371) is arranged at intervals along the width direction of the elastic piece (37). Part of the structure on the outer surface of the sealing strip (36) is embedded in the long holes (371); the length direction of the sealing strip (36) is inclined relative to the axial direction of the plugging main body (31), and the shortest distance between the sealing strip (36) and the axis of the plugging main body (31) gradually increases from the direction away from the fixed end member (1); a protruding portion (327) is fixed on the side surface of the anti-disengagement piece (322). One end of the sealing strip (36) away from the fixed end member (1) is an arc end (361), and the arc end (361) abuts against both the end face of the end cover (32) and the surface of the protruding portion (327) at the same time.

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