A plug housing assembly, a plug and a fast charging connector

Abstract

The application provides a plug shell assembly, a plug and a fast charging connector, and belongs to the technical field of connectors. The plug shell assembly comprises a plug shell and a cover hinged to the plug shell. One of the plug shell and the cover is fixedly connected with a hinge shaft, and the other is provided with a mounting groove for mounting the hinge shaft and rotationally matched with the hinge shaft, and a anti-extraction protrusion for preventing the hinge shaft from being extracted. The size of the anti-extraction protrusion satisfies that the hinge shaft can be forcedly mounted into the mounting groove beyond the anti-extraction protrusion. The component provided with the mounting groove is further provided with a cantilevered locking arm. One of the hinge shaft and the locking arm is provided with a clamping groove, and the other is provided with a locking protrusion clamped into the clamping groove when the cover is opened to a certain extent to lock the position of the cover. When assembled, the hinge shaft only needs to be clamped into the mounting groove, and no separate assembly of parts such as a rotating shaft, a pin and a torsional spring is needed, so that the assembly is more convenient and the assembly efficiency can be greatly improved.

Description

Technical Field

[0001] This invention relates to a plug housing assembly, a plug, and a fast-charging connector, belonging to the field of connector technology. Background Technology

[0002] In fast charging connectors, the power conductors in the plug and socket are typically connected by bolts. To facilitate bolt tightening, the plug housing usually has an openable cover that provides a sealing protection function. Existing technologies employ various methods for installing the cover. For example, Chinese invention patent application CN110611199A discloses a wiring connector in which the cover is bolted to the base (i.e., the plug housing). This method requires the removal and installation of multiple bolts when opening and closing the cover, which is cumbersome, and the cover is easily lost after detaching from the plug housing.

[0003] For example, Chinese invention patent application CN115084876A discloses a wiring connector in which one end of the top cover is hinged to the plug housing, and the other end is fixed to the plug housing with screws. This method requires fewer screws for disassembly and assembly, and the top cover is attached to the plug housing, making it less likely to be lost. In other prior art, one end of the top cover is hinged to the plug housing, and the other end is fixed to the plug housing with a clip. This method is even simpler to operate when opening and closing the top cover. However, because the top cover is flexibly mounted on the plug housing, in some applications, when the top cover is not facing upwards but horizontally or even downwards, it cannot be maintained at a specific angle after being opened, causing inconvenience for the operator when tightening the screws.

[0004] In response, Chinese utility model patent CN220628313U discloses a convenient high-current metal busbar connector. One end of the top cover is hinged to the plug housing via a pivot, and the other end is fixed to the plug housing with bolts. A plug cover spring (i.e., a torsion spring) is fitted on the pivot to press the top cover firmly, allowing the top cover to remain open for wiring operations. However, in practical applications, to prevent the pivot from dislodging, pins are needed to fix the pivot to the plug housing. This results in a large number of components requiring assembly, including the pivot, pins, and torsion spring, making plug assembly cumbersome and inefficient. Summary of the Invention

[0005] The purpose of this invention is to provide a plug housing assembly to solve the problem of cumbersome and inefficient assembly caused by the need to install multiple components such as pivots, pins, and torsion springs when assembling the top cover onto the plug housing in the prior art; the purpose of this invention is also to provide a plug and a fast charging connector to solve the above problems.

[0006] To achieve the above objectives, the plug housing assembly of the present invention adopts the following technical solution: A plug housing assembly includes a plug housing and a top cover hinged to the plug housing. A hinge pin is fixedly connected to one component of the plug housing and the top cover. The other component has a mounting groove for inserting and rotating the hinge pin, and an anti-disengagement protrusion to prevent the hinge pin from disengaging. The size of the anti-disengagement protrusion is such that the hinge pin can be forcibly inserted into the mounting groove by passing over the anti-disengagement protrusion. One of the mounting groove wall and the hinge pin has a slot, and the other has a locking protrusion that engages with the slot to lock the position of the top cover when the top cover is opened to a certain extent. And / or, the component with the mounting groove also has a cantilevered locking arm. One of the locking arm and the hinge pin has a slot, and the other has a locking protrusion that engages with the slot to lock the position of the top cover when the top cover is opened to a certain extent.

[0007] The beneficial effects of the above technical solution are as follows: This invention is an improved invention. Specifically, the hinge is directly fixed to one of the components of the plug housing and the top cover. The other component of the plug housing and the top cover is provided with a mounting groove for the hinge shaft to be inserted and rotated with the hinge shaft, as well as an anti-detachment protrusion to prevent the hinge shaft from coming out. The size of the anti-detachment protrusion is sufficient to allow the hinge shaft to pass over the anti-detachment protrusion and be forcibly inserted into the mounting groove. In this way, when assembling the top cover, the hinge shaft can be directly forcibly inserted into the mounting groove to achieve the hinge between the top cover and the plug housing. There is no need to separately assemble parts such as rotating shafts and pins, making assembly more convenient.

[0008] Meanwhile, one of the mounting groove walls and hinge pins is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. Alternatively, the component with the mounting groove is also provided with a cantilevered locking arm. One of the locking arm and hinge pin is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. Therefore, as long as the top cover is opened to a certain extent, the locking protrusion can engage with the slot to lock the position of the top cover, keeping it in the open state for easy bolt tightening. Since the locking protrusion and slot are directly provided on the mounting groove walls and hinge pins, and / or the locking arm and hinge pins, only the hinge connection between the top cover and the plug housing needs to be achieved; no additional torsion spring is required. During assembly, only the hinge pin needs to be engaged in the mounting groove, making assembly very convenient and greatly improving assembly efficiency.

[0009] Furthermore, the mounting groove includes two end mounting grooves that mate with both ends of the hinge shaft and a middle mounting groove that mates with the middle of the hinge shaft.

[0010] The beneficial effects of the above technical solution are: the two ends and the middle part work together, which not only makes the structure simple, but also makes the hinge shaft bear the force evenly.

[0011] Furthermore, there are two central mounting slots arranged at intervals, and the locking arm is located between the two central mounting slots.

[0012] The advantages of the above technical solution are: the locking arm is set in the center, only one is needed, the locking force is in the center, and the load is balanced.

[0013] Furthermore, the top surface of the plug housing is provided with two end plate structures and two middle plate structures. The end plate structures are provided with the end mounting grooves, and the middle plate structures are provided with the middle mounting grooves. The upper cover includes a cover body and two connecting parts connected to the edge of the cover body and arranged at intervals. The hinge shaft is fixedly connected to the two connecting parts and the two ends of the hinge shaft are respectively suspended. The middle part of the hinge shaft, together with the cover body and the two connecting parts, forms a clearance hole for avoiding the two middle plate structures and the locking arm.

[0014] The advantages of the above technical solution are: it facilitates manufacturing and installation, and also makes it easy for the top cover to be completely closed.

[0015] Furthermore, the anti-detachment protrusions are provided in the groove areas of the two end mounting slots respectively.

[0016] The beneficial effect of the above technical solution is that the anti-detachment protrusions are located at both ends, resulting in a better limiting effect.

[0017] Furthermore, the upper side wall of the two end mounting slots is connected to an extension wall extending in opposite directions, and each end of the two extension walls is provided with an anti-detachment protrusion.

[0018] The beneficial effect of the above technical solution is that the deformation of the extension wall facilitates the hinge shaft to pass over the anti-detachment protrusion and be forcibly installed into the mounting groove.

[0019] Furthermore, the ends of the two mounting slots that are far apart from each other are respectively provided with closed sidewalls to cover the end face of the hinge shaft and prevent the hinge shaft from moving axially.

[0020] The beneficial effect of the above technical solution is that it prevents the top cover from moving axially along the hinge shaft, thus ensuring the closing effect of the top cover.

[0021] Furthermore, the mounting groove is provided on the plug housing and the mounting groove has an arc-shaped groove wall that fits in contact with the outer peripheral surface of the hinge shaft. The plug housing assembly also includes a tail cap that snaps onto the tail of the plug housing. The end of the tail cap facing the mounting groove has an arc-shaped surface for fitting in contact with the outer peripheral surface of the hinge shaft.

[0022] The beneficial effects of the above technical solution are as follows: the stop and limit of the tail cover can further prevent the hinge shaft from coming out of the mounting groove, while the arc-shaped surface on the tail cover and the arc-shaped groove wall of the mounting groove facilitate the rotation of the hinge shaft.

[0023] Furthermore, the top of the tail cap has stop portions formed at both ends and in the middle, and each stop portion has the aforementioned arc-shaped surface.

[0024] The advantages of the above technical solution are: by forming multiple stop parts to set the arc surface, the structure is simple and easy to manufacture and form, and the stop parts are distributed at both ends and the middle, so the limiting effect is better.

[0025] Furthermore, the mounting groove is provided on the top of the plug housing, and the anti-detachment protrusion is provided on the top surface of the plug housing. The mounting groove has an arc-shaped groove wall that fits and contacts the outer peripheral surface of the hinge shaft. The side of the anti-detachment protrusion facing the mounting groove has an arc-shaped surface for fitting and contacting the outer peripheral surface of the hinge shaft. The side of the anti-detachment protrusion facing away from the mounting groove has a guide slope for guiding the hinge shaft past the anti-detachment protrusion to be forcibly inserted into the mounting groove.

[0026] The beneficial effects of the above technical solution are as follows: the anti-detachment protrusion and the mounting groove cooperate to restrict the hinge shaft between the two, and the arc-shaped surface on the anti-detachment protrusion and the arc-shaped groove wall of the mounting groove facilitate the rotation of the hinge shaft. At the same time, the guide slope on the anti-detachment protrusion facilitates the hinge shaft to pass over the anti-detachment protrusion, which facilitates the assembly of the hinge shaft.

[0027] Furthermore, there are two or more anti-detachment protrusions, and each anti-detachment protrusion is staggered from the mounting groove in the axial direction of the hinge shaft.

[0028] The beneficial effect of the above technical solution is that the force on the hinge shaft is more dispersed.

[0029] Furthermore, the locking arm is provided with the locking protrusion, and the hinge shaft is provided with the slot. The hinge shaft includes a locking part that cooperates with the locking arm. The locking part includes a concentric large-diameter arc surface and a small-diameter arc surface. One circumferential end of the small-diameter arc surface and one circumferential end of the large-diameter arc surface are connected by an arc-shaped groove. The other circumferential end of the small-diameter arc surface is provided with a pressing protrusion. The pressing protrusion and the other circumferential end of the large-diameter arc surface form the slot. When the top cover is closed, the locking protrusion fits into the arc-shaped groove. During the opening of the top cover, the locking protrusion slides into the small-diameter arc surface until the pressing protrusion presses against the locking protrusion, causing the locking arm to deform so that the pressing protrusion passes over the locking protrusion and the locking protrusion is engaged in the slot.

[0030] The beneficial effects of the above technical solution are as follows: During the opening and closing of the cover, the locking protrusion slides and engages with the small-diameter arc surface most of the time, and the locking arm does not deform. Therefore, the resistance to opening and closing the cover is small, making it easy to operate. Only when the cover is opened to a certain extent will the top-pressing protrusion press against the locking protrusion, causing the locking arm to deform. This allows the top-pressing protrusion to pass over the locking protrusion while the locking protrusion engages in the slot. In other words, only when the cover is about to be locked does it need to overcome a certain opening resistance, which also provides a signal that the cover is about to be opened to its limit. When the cover is completely closed, the locking protrusion fits into the arc groove, which can serve as an auxiliary limit.

[0031] To achieve the above objectives, the plug in this invention adopts the following technical solution: A plug includes a housing assembly, which includes a plug housing and a top cover hinged to the plug housing. A hinge pin is fixedly connected to one component of the plug housing and the top cover, and the other component has a mounting groove for inserting and rotating the hinge pin, and an anti-disengagement protrusion to prevent the hinge pin from disengaging. The anti-disengagement protrusion is sized such that the hinge pin can be forcibly inserted into the mounting groove by passing over the anti-disengagement protrusion. One of the mounting groove wall and the hinge pin has a slot, and the other has a locking protrusion that engages with the slot to lock the position of the top cover when the top cover is opened to a certain extent. And / or, the component with the mounting groove also has a cantilevered locking arm, and one of the locking arm and the hinge pin has a slot, and the other has a locking protrusion that engages with the slot to lock the position of the top cover when the top cover is opened to a certain extent.

[0032] The beneficial effects of the above technical solution are as follows: This invention is an improved invention. Specifically, the hinge is directly fixed to one of the components of the plug housing and the top cover. The other component of the plug housing and the top cover is provided with a mounting groove for the hinge shaft to be inserted and rotated with the hinge shaft, as well as an anti-detachment protrusion to prevent the hinge shaft from coming out. The size of the anti-detachment protrusion is sufficient to allow the hinge shaft to pass over the anti-detachment protrusion and be forcibly inserted into the mounting groove. In this way, when assembling the top cover, the hinge shaft can be directly forcibly inserted into the mounting groove to achieve the hinge between the top cover and the plug housing. There is no need to separately assemble parts such as rotating shafts and pins, making assembly more convenient.

[0033] Meanwhile, one of the mounting groove walls and hinge pins is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. Alternatively, the component with the mounting groove is also provided with a cantilevered locking arm. One of the locking arm and hinge pin is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. Therefore, as long as the top cover is opened to a certain extent, the locking protrusion can engage with the slot to lock the position of the top cover, keeping it in the open state for easy bolt tightening. Since the locking protrusion and slot are directly provided on the mounting groove walls and hinge pins, and / or the locking arm and hinge pins, only the hinge connection between the top cover and the plug housing needs to be achieved; no additional torsion spring is required. During assembly, only the hinge pin needs to be engaged in the mounting groove, making assembly very convenient and greatly improving assembly efficiency.

[0034] Furthermore, the mounting groove includes two end mounting grooves that mate with both ends of the hinge shaft and a middle mounting groove that mates with the middle of the hinge shaft.

[0035] The beneficial effects of the above technical solution are: the two ends and the middle part work together, which not only makes the structure simple, but also makes the hinge shaft bear the force evenly.

[0036] Furthermore, there are two central mounting slots arranged at intervals, and the locking arm is located between the two central mounting slots.

[0037] The advantages of the above technical solution are: the locking arm is set in the center, only one is needed, the locking force is in the center, and the load is balanced.

[0038] Furthermore, the top surface of the plug housing is provided with two end plate structures and two middle plate structures. The end plate structures are provided with the end mounting grooves, and the middle plate structures are provided with the middle mounting grooves. The upper cover includes a cover body and two connecting parts connected to the edge of the cover body and arranged at intervals. The hinge shaft is fixedly connected to the two connecting parts and the two ends of the hinge shaft are respectively suspended. The middle part of the hinge shaft, together with the cover body and the two connecting parts, forms a clearance hole for avoiding the two middle plate structures and the locking arm.

[0039] The advantages of the above technical solution are: it facilitates manufacturing and installation, and also makes it easy for the top cover to be completely closed.

[0040] Furthermore, the anti-detachment protrusions are provided in the groove areas of the two end mounting slots respectively.

[0041] The beneficial effect of the above technical solution is that the anti-detachment protrusions are located at both ends, resulting in a better limiting effect.

[0042] Furthermore, the upper side wall of the two end mounting slots is connected to an extension wall extending in opposite directions, and each end of the two extension walls is provided with an anti-detachment protrusion.

[0043] The beneficial effect of the above technical solution is that the deformation of the extension wall facilitates the hinge shaft to pass over the anti-detachment protrusion and be forcibly installed into the mounting groove.

[0044] Furthermore, the ends of the two mounting slots that are far apart from each other are respectively provided with closed sidewalls to cover the end face of the hinge shaft and prevent the hinge shaft from moving axially.

[0045] The beneficial effect of the above technical solution is that it prevents the top cover from moving axially along the hinge shaft, thus ensuring the closing effect of the top cover.

[0046] Furthermore, the mounting groove is provided on the plug housing and the mounting groove has an arc-shaped groove wall that fits in contact with the outer peripheral surface of the hinge shaft. The housing assembly also includes a tail cap that snaps onto the tail of the plug housing. The end of the tail cap facing the mounting groove has an arc-shaped surface for fitting in contact with the outer peripheral surface of the hinge shaft.

[0047] The beneficial effects of the above technical solution are as follows: the stop and limit of the tail cover can further prevent the hinge shaft from coming out of the mounting groove, while the arc-shaped surface on the tail cover and the arc-shaped groove wall of the mounting groove facilitate the rotation of the hinge shaft.

[0048] Furthermore, the top of the tail cap has stop portions formed at both ends and in the middle, and each stop portion has the aforementioned arc-shaped surface.

[0049] The advantages of the above technical solution are: by forming multiple stop parts to set the arc surface, the structure is simple and easy to manufacture and form, and the stop parts are distributed at both ends and the middle, so the limiting effect is better.

[0050] Furthermore, the mounting groove is provided on the top of the plug housing, and the anti-detachment protrusion is provided on the top surface of the plug housing. The mounting groove has an arc-shaped groove wall that fits and contacts the outer peripheral surface of the hinge shaft. The side of the anti-detachment protrusion facing the mounting groove has an arc-shaped surface for fitting and contacting the outer peripheral surface of the hinge shaft. The side of the anti-detachment protrusion facing away from the mounting groove has a guide slope for guiding the hinge shaft past the anti-detachment protrusion to be forcibly inserted into the mounting groove.

[0051] The beneficial effects of the above technical solution are as follows: the anti-detachment protrusion and the mounting groove cooperate to restrict the hinge shaft between the two, and the arc-shaped surface on the anti-detachment protrusion and the arc-shaped groove wall of the mounting groove facilitate the rotation of the hinge shaft. At the same time, the guide slope on the anti-detachment protrusion facilitates the hinge shaft to pass over the anti-detachment protrusion, which facilitates the assembly of the hinge shaft.

[0052] Furthermore, there are two or more anti-detachment protrusions, and each anti-detachment protrusion is staggered from the mounting groove in the axial direction of the hinge shaft.

[0053] The beneficial effect of the above technical solution is that the force on the hinge shaft is more dispersed.

[0054] Furthermore, the locking arm is provided with the locking protrusion, and the hinge shaft is provided with the slot. The hinge shaft includes a locking part that cooperates with the locking arm. The locking part includes a concentric large-diameter arc surface and a small-diameter arc surface. One circumferential end of the small-diameter arc surface and one circumferential end of the large-diameter arc surface are connected by an arc-shaped groove. The other circumferential end of the small-diameter arc surface is provided with a pressing protrusion. The pressing protrusion and the other circumferential end of the large-diameter arc surface form the slot. When the top cover is closed, the locking protrusion fits into the arc-shaped groove. During the opening of the top cover, the locking protrusion slides into the small-diameter arc surface until the pressing protrusion presses against the locking protrusion, causing the locking arm to deform so that the pressing protrusion passes over the locking protrusion and the locking protrusion is engaged in the slot.

[0055] The beneficial effects of the above technical solution are as follows: During the opening and closing of the cover, the locking protrusion slides and engages with the small-diameter arc surface most of the time, and the locking arm does not deform. Therefore, the resistance to opening and closing the cover is small, making it easy to operate. Only when the cover is opened to a certain extent will the top-pressing protrusion press against the locking protrusion, causing the locking arm to deform. This allows the top-pressing protrusion to pass over the locking protrusion while the locking protrusion engages in the slot. In other words, only when the cover is about to be locked does it need to overcome a certain opening resistance, which also provides a signal that the cover is about to be opened to its limit. When the cover is completely closed, the locking protrusion fits into the arc groove, which can serve as an auxiliary limit.

[0056] To achieve the above objectives, the fast charging connector in this invention adopts the following technical solution: A fast charging connector includes a plug and a socket. The plug includes a housing assembly, which includes a plug housing and a top cover hinged to the plug housing. A hinge pin is fixed to one component of the plug housing and the top cover. The other component has a mounting groove for inserting and rotating the hinge pin, and an anti-disengagement protrusion to prevent the hinge pin from disengaging. The anti-disengagement protrusion is sized such that the hinge pin can be forcibly inserted into the mounting groove by passing over the anti-disengagement protrusion. One of the mounting groove wall and the hinge pin has a slot, and the other has a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. And / or, the component with the mounting groove also has a cantilevered locking arm, and one of the locking arm and the hinge pin has a slot, and the other has a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent.

[0057] The beneficial effects of the above technical solution are as follows: This invention is an improved invention. Specifically, the hinge is directly fixed to one of the components of the plug housing and the top cover. The other component of the plug housing and the top cover is provided with a mounting groove for the hinge shaft to be inserted and rotated with the hinge shaft, as well as an anti-detachment protrusion to prevent the hinge shaft from coming out. The size of the anti-detachment protrusion is sufficient to allow the hinge shaft to pass over the anti-detachment protrusion and be forcibly inserted into the mounting groove. In this way, when assembling the top cover, the hinge shaft can be directly forcibly inserted into the mounting groove to achieve the hinge between the top cover and the plug housing. There is no need to separately assemble parts such as rotating shafts and pins, making assembly more convenient.

[0058] Meanwhile, one of the mounting groove walls and hinge pins is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. Alternatively, the component with the mounting groove is also provided with a cantilevered locking arm. One of the locking arm and hinge pin is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the top cover when it is opened to a certain extent. Therefore, as long as the top cover is opened to a certain extent, the locking protrusion can engage with the slot to lock the position of the top cover, keeping it in the open state for easy bolt tightening. Since the locking protrusion and slot are directly provided on the mounting groove walls and hinge pins, and / or the locking arm and hinge pins, only the hinge connection between the top cover and the plug housing needs to be achieved; no additional torsion spring is required. During assembly, only the hinge pin needs to be engaged in the mounting groove, making assembly very convenient and greatly improving assembly efficiency.

[0059] Furthermore, the mounting groove includes two end mounting grooves that mate with both ends of the hinge shaft and a middle mounting groove that mates with the middle of the hinge shaft.

[0060] The beneficial effects of the above technical solution are: the two ends and the middle part work together, which not only makes the structure simple, but also makes the hinge shaft bear the force evenly.

[0061] Furthermore, there are two central mounting slots arranged at intervals, and the locking arm is located between the two central mounting slots.

[0062] The advantages of the above technical solution are: the locking arm is set in the center, only one is needed, the locking force is in the center, and the load is balanced.

[0063] Furthermore, the top surface of the plug housing is provided with two end plate structures and two middle plate structures. The end plate structures are provided with the end mounting grooves, and the middle plate structures are provided with the middle mounting grooves. The upper cover includes a cover body and two connecting parts connected to the edge of the cover body and arranged at intervals. The hinge shaft is fixedly connected to the two connecting parts and the two ends of the hinge shaft are respectively suspended. The middle part of the hinge shaft, together with the cover body and the two connecting parts, forms a clearance hole for avoiding the two middle plate structures and the locking arm.

[0064] The advantages of the above technical solution are: it facilitates manufacturing and installation, and also makes it easy for the top cover to be completely closed.

[0065] Furthermore, the anti-detachment protrusions are provided in the groove areas of the two end mounting slots respectively.

[0066] The beneficial effect of the above technical solution is that the anti-detachment protrusions are located at both ends, resulting in a better limiting effect.

[0067] Furthermore, the upper side wall of the two end mounting slots is connected to an extension wall extending in opposite directions, and each end of the two extension walls is provided with an anti-detachment protrusion.

[0068] The beneficial effect of the above technical solution is that the deformation of the extension wall facilitates the hinge shaft to pass over the anti-detachment protrusion and be forcibly installed into the mounting groove.

[0069] Furthermore, the ends of the two mounting slots that are far apart from each other are respectively provided with closed sidewalls to cover the end face of the hinge shaft and prevent the hinge shaft from moving axially.

[0070] The beneficial effect of the above technical solution is that it prevents the top cover from moving axially along the hinge shaft, thus ensuring the closing effect of the top cover.

[0071] Furthermore, the mounting groove is provided on the plug housing and the mounting groove has an arc-shaped groove wall that fits in contact with the outer peripheral surface of the hinge shaft. The housing assembly also includes a tail cap that snaps onto the tail of the plug housing. The end of the tail cap facing the mounting groove has an arc-shaped surface for fitting in contact with the outer peripheral surface of the hinge shaft.

[0072] The beneficial effects of the above technical solution are as follows: the stop and limit of the tail cover can further prevent the hinge shaft from coming out of the mounting groove, while the arc-shaped surface on the tail cover and the arc-shaped groove wall of the mounting groove facilitate the rotation of the hinge shaft.

[0073] Furthermore, the top of the tail cap has stop portions formed at both ends and in the middle, and each stop portion has the aforementioned arc-shaped surface.

[0074] The advantages of the above technical solution are: by forming multiple stop parts to set the arc surface, the structure is simple and easy to manufacture and form, and the stop parts are distributed at both ends and the middle, so the limiting effect is better.

[0075] Furthermore, the mounting groove is provided on the top of the plug housing, and the anti-detachment protrusion is provided on the top surface of the plug housing. The mounting groove has an arc-shaped groove wall that fits and contacts the outer peripheral surface of the hinge shaft. The side of the anti-detachment protrusion facing the mounting groove has an arc-shaped surface for fitting and contacting the outer peripheral surface of the hinge shaft. The side of the anti-detachment protrusion facing away from the mounting groove has a guide slope for guiding the hinge shaft past the anti-detachment protrusion to be forcibly inserted into the mounting groove.

[0076] The beneficial effects of the above technical solution are as follows: the anti-detachment protrusion and the mounting groove cooperate to restrict the hinge shaft between the two, and the arc-shaped surface on the anti-detachment protrusion and the arc-shaped groove wall of the mounting groove facilitate the rotation of the hinge shaft. At the same time, the guide slope on the anti-detachment protrusion facilitates the hinge shaft to pass over the anti-detachment protrusion, which facilitates the assembly of the hinge shaft.

[0077] Furthermore, there are two or more anti-detachment protrusions, and each anti-detachment protrusion is staggered from the mounting groove in the axial direction of the hinge shaft.

[0078] The beneficial effect of the above technical solution is that the force on the hinge shaft is more dispersed.

[0079] Furthermore, the locking arm is provided with the locking protrusion, and the hinge shaft is provided with the slot. The hinge shaft includes a locking part that cooperates with the locking arm. The locking part includes a concentric large-diameter arc surface and a small-diameter arc surface. One circumferential end of the small-diameter arc surface and one circumferential end of the large-diameter arc surface are connected by an arc-shaped groove. The other circumferential end of the small-diameter arc surface is provided with a pressing protrusion. The pressing protrusion and the other circumferential end of the large-diameter arc surface form the slot. When the top cover is closed, the locking protrusion fits into the arc-shaped groove. During the opening of the top cover, the locking protrusion slides into the small-diameter arc surface until the pressing protrusion presses against the locking protrusion, causing the locking arm to deform so that the pressing protrusion passes over the locking protrusion and the locking protrusion is engaged in the slot.

[0080] The beneficial effects of the above technical solution are as follows: During the opening and closing of the cover, the locking protrusion slides and engages with the small-diameter arc surface most of the time, and the locking arm does not deform. Therefore, the resistance to opening and closing the cover is small, making it easy to operate. Only when the cover is opened to a certain extent will the top-pressing protrusion press against the locking protrusion, causing the locking arm to deform. This allows the top-pressing protrusion to pass over the locking protrusion while the locking protrusion engages in the slot. In other words, only when the cover is about to be locked does it need to overcome a certain opening resistance, which also provides a signal that the cover is about to be opened to its limit. When the cover is completely closed, the locking protrusion fits into the arc groove, which can serve as an auxiliary limit. Attached Figure Description

[0081] Figure 1This is a perspective view of Embodiment 1 of the plug housing assembly of the present invention; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 This is a partial perspective view of the plug housing in Embodiment 1 of the plug housing assembly of the present invention; Figure 4 This is a partial enlarged view of the plug housing in Embodiment 1 of the plug housing assembly of the present invention; Figure 5 This is a partial perspective view of the upper cover in Embodiment 1 of the plug housing assembly of the present invention; Figure 6 This is a partial perspective view of the upper cover in Embodiment 1 of the plug housing assembly of the present invention from another angle; Figure 7 This is a partial perspective view of Embodiment 2 of the plug housing assembly of the present invention; Figure 8 This is a partial perspective view of another embodiment 2 of the plug housing assembly of the present invention; Figure 9 This is a partial perspective sectional view of Embodiment 2 of the plug housing assembly of the present invention; Figure 10 This is a partial side sectional view of Embodiment 2 of the plug housing assembly of the present invention; Figure 11 This is a three-dimensional sectional view of the upper cover of the plug housing assembly of the present invention opened to a certain extent; Figure 12 This is a side sectional view of the plug housing assembly of the present invention with the top cover opened to a certain extent. Figure 13 This is a perspective cross-sectional view of the plug housing assembly of the present invention with the top cover fully open and locked in position. Figure 14 This is a side sectional view of the plug housing assembly of the present invention with the top cover fully open and locked in position. Figure 15 This is a perspective view of embodiment 3 of the plug housing assembly of the present invention; Figure 16 This is a partial perspective view of Embodiment 3 of the plug housing assembly of the present invention.

[0082] In the diagram: 1. Plug housing; 11. End clamping plate structure; 111. End mounting groove; 112. Extension wall; 113. Anti-detachment protrusion; 114. Closed side wall; 115. Fixing wall; 12. Middle clamping plate structure; 121. Middle mounting groove; 13. Locking arm; 131. Locking protrusion; 14. Connecting wall; 15. Snap-fit ​​protrusion; 16. Guide rib plate; 17. Anti-detachment protrusion; 2. Top cover; 21. Cover body; 22. Connecting part; 23. Hinge shaft; 231. Large diameter arc surface; 232. Small diameter arc surface; 233. Arc groove; 234. Top pressure protrusion; 235. Slot; 24. Clearance hole; 3. Tail cover; 31. End stop part; 311. End arc surface; 32. Middle stop part; 321. Middle arc surface; 4. Conductive bar. Detailed Implementation

[0083] To address the technical problems existing in the prior art, the basic concept of this invention is to directly and integrally mold the hinge shaft onto one of the components of the top cover and the plug housing. The other component has a mounting groove for the hinge shaft to be inserted and rotated within it. An anti-detachment protrusion is also provided to prevent the hinge shaft from coming out of the mounting groove. The size of the anti-detachment protrusion is such that the hinge shaft can be forced into the mounting groove through it. When assembling the top cover and the plug housing, only the hinge shaft needs to be inserted into the mounting groove; there are no other unnecessary parts, making assembly convenient and efficient. Furthermore, this invention also provides slots and locking protrusions on the mounting groove and the hinge shaft, and / or on the locking arm and the hinge shaft. This allows the locking protrusion to engage with the slot when the top cover is opened to a certain extent, locking the top cover in its open state without the need for a torsion spring. This facilitates bolt locking operations and reduces the number of parts required.

[0084] The features and performance of the present invention will be further described in detail below with reference to the embodiments.

[0085] Embodiments of the plug housing assembly in this invention: like Figure 1 As shown, the plug housing assembly includes a plug housing 1 and an upper cover 2 hinged to the plug housing 1. In this embodiment, a hinge shaft 23 is fixedly connected to the upper cover 2. The hinge shaft 23 and the upper cover 2 are integrally injection molded. In other embodiments, it can also be integrally molded by 3D printing, or the hinge shaft 23 can be separate and pre-bonded and fixed to the upper cover 2.

[0086] The plug housing 1 is provided with a mounting groove for inserting and rotating the hinge shaft 23, specifically in conjunction with... Figure 2 , Figure 3 , Figure 4 As shown, the top surface of the plug housing 1 is provided with two end retaining plate structures 11 and two middle retaining plate structures 12. Each retaining plate structure can be integrally formed with the plug housing 1, or it can be manufactured separately and then glued and fixed.

[0087] The aforementioned mounting grooves include an end mounting groove 111 provided on the end clamping plate structure 11 and a middle mounting groove 121 provided on the middle clamping plate structure 12. Obviously, there are two end mounting grooves 111, which cooperate with the two ends of the hinge shaft 23, and there are also two middle mounting grooves 121, which cooperate with the middle of the hinge shaft 23. Through multi-point support and limiting, the hinge shaft 23 can be subjected to more balanced force and rotate more stably.

[0088] In other embodiments, only one central clamping plate structure 12 may be provided, in which case there is only one central mounting slot 121 and two end mounting slots 111. In other embodiments, the central clamping plate structure 12 may not be provided, in which case there are only two end mounting slots 111. In other embodiments, the end clamping plate structure 11 may not be provided, and only two central clamping plate structures 12 may be provided, with the hinge shaft 23 being hinged through the two central mounting slots 121.

[0089] Furthermore, the plug housing 1 is also provided with an anti-detachment protrusion 113 to prevent the hinge shaft 23 from coming out of the mounting groove. Of course, the size of the anti-detachment protrusion 113 is sufficient to allow the hinge shaft 23 to pass over the anti-detachment protrusion 113 and be forcibly inserted into the mounting groove. In this way, when assembling the top cover 2, the hinge shaft 23 can be directly forcibly inserted into the mounting groove to achieve the hinge connection between the top cover 2 and the plug housing 1. There is no need to assemble the pivot, pin and other parts separately, making the assembly more convenient.

[0090] Specifically, in this embodiment, anti-detachment protrusions 113 are provided in the slot opening areas of the two end mounting slots 111, which limit the two ends of the hinge shaft 23, resulting in a better limiting effect. In other embodiments, in addition to the slot opening areas of the two end mounting slots 111, anti-detachment protrusions can also be provided in the slot opening areas of the two middle mounting slots 121. In this case, the resistance to the insertion of the hinge shaft 23 will increase, but the anti-detachment effect will be enhanced. In other embodiments, anti-detachment protrusions can also be provided only in the slot opening areas of the middle mounting slots 121.

[0091] Furthermore, in this embodiment, the two end plate structures 11 include opposing extension walls 112. The extension walls 112 are specifically connected to the upper groove wall of the end mounting groove 111. Each end of the two extension walls 112 is provided with an anti-detachment protrusion 113. That is, the anti-detachment protrusion 113 is not on the groove wall of the end mounting groove 111, but at a certain distance from the end mounting groove 111. In this way, through the deformation of the extension walls 112, the hinge shaft 23 can more easily push open the anti-detachment protrusion 113 and enter the mounting groove.

[0092] Furthermore, to ensure structural strength, a fixing wall 115 is fixedly connected between the extension wall 112 and the top surface of the plug housing 1. If the opening of the mounting groove is defined to face rearward, the fixing wall 115 is located at the front end of the extension wall 112, ensuring that the rear side is open so that the hinge pin 23 can be inserted. In other embodiments, the fixing wall 115 may not be provided, and the extension wall 112 can be extended as a whole. In other embodiments, the anti-detachment protrusion may also be provided on the groove wall of the mounting groove at the groove opening position, in which case the extension wall 112 is not required.

[0093] Furthermore, the ends of the two mounting slots 111 that are far apart from each other are respectively provided with closed sidewalls 114 to cover the end face of the hinge shaft 23 and prevent the hinge shaft 23 from moving axially, thus ensuring the closing effect of the upper cover 2. In other embodiments, the closed sidewalls 114 may not be provided, and other structures may be used to limit the axial movement of the hinge shaft 23. For example, a pair of flanges may be provided on the hinge shaft, and the pair of flanges may be locked on both sides of a clamping plate structure, which can also prevent the hinge shaft from moving.

[0094] As described above, the end plate structure 11 is relatively complex, while the middle plate structure 12 is simpler, essentially consisting of a mounting groove on a vertical plate. Furthermore, in this embodiment, both the end mounting groove 111 and the middle mounting groove 121 have arc-shaped groove walls that fit snugly against the outer circumferential surface of the hinge shaft 23, achieving surface-to-surface contact with the hinge shaft 23, increasing the contact area, facilitating smooth rotation of the hinge shaft 23, and reducing wear. In other embodiments, the mounting groove can be a U-shaped groove with the opening facing backwards, in which case the hinge shaft 23 has line contact with the two side walls and the bottom wall of the U-shaped groove.

[0095] Furthermore, such as Figure 3 and Figure 4 As shown, the plug housing 1 in this embodiment is also provided with a cantilevered locking arm 13. One of the locking arm 13 and the hinge pin 23 is provided with a slot, and the other is provided with a locking protrusion that engages with the slot to lock the position of the upper cover 2 when it is opened to a certain extent. Therefore, as long as the upper cover 2 is opened to a certain extent, the locking protrusion can engage with the slot to lock the position of the upper cover 2, keeping the upper cover 2 in the open state, which facilitates the bolt locking operation. Moreover, since the locking protrusion and the slot are structures directly provided on the locking arm and the hinge pin, it is only necessary to achieve the hinge connection between the upper cover and the plug housing. There is no need to install a torsion spring separately. That is, during assembly, it is only necessary to engage the hinge pin with the mounting groove, which is very convenient and can greatly improve the assembly efficiency.

[0096] Furthermore, the locking arm 13 is located between the two central locking plate structures 12, that is, the two central mounting slots 121 are arranged at intervals, and the locking arm 13 is located between the two central mounting slots 121. In this way, only one locking arm 13 needs to be set, and the locking part that cooperates with the locking arm 13 only needs to be set in the middle part of the hinge shaft 23. Other positions, especially the position that cooperates with the mounting slot, can be standard cylindrical surfaces, which simplifies the structure and applies the locking force in the middle, avoiding uneven force on the hinge shaft.

[0097] Specifically, the root (front end) of the locking arm 13 is connected to the middle retaining plate structure 12 on both sides, and a connecting wall 14 is fixed between the front end of the locking arm 13 and the top surface of the plug housing 1. Therefore, a groove is formed between the locking arm 13, the connecting wall 14, and the top surface of the plug housing 1. Figure 9 and Figure 10 (As shown).

[0098] In other embodiments, the connecting wall 14 may be omitted, and the locking arm 13 may be connected to the central retaining plate structures 12 on both sides only through its root. In other embodiments, the locking arm 13 may not be connected to the central retaining plate structures 12 on both sides, but may be fixed to the top surface of the plug housing 1 through the connecting wall 14. In other embodiments, a locking arm 13 may be provided on each of the left and right sides of the two central retaining plate structures 12.

[0099] Furthermore, combined Figure 5 and Figure 6 As shown, the upper cover 2 includes a cover body 21 and two connecting parts 22 arranged at intervals along the edge of the cover body 21. The hinge shaft 23 is fixedly connected to the two connecting parts 22, and both ends of the hinge shaft 23 extend outwards to facilitate the insertion of both ends of the hinge shaft 23 into the end mounting grooves 111. The middle part of the hinge shaft 23, together with the cover body 21 and the two connecting parts 22, forms a clearance hole 24 to avoid the two central locking plate structures 12 and the locking arm 13, ensuring that the upper cover 2 can be completely closed.

[0100] In other embodiments, if there are only end mounting slots and no middle mounting slots, that is, if there are no two middle locking plate structures 12 and the locking arms 13 are located in other positions, such as at both ends, then the clearance holes 24 no longer exist.

[0101] In this embodiment, combined with Figure 6 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14As shown, the locking arm 13 is provided with a locking protrusion 131, and the locking part of the hinge shaft 23 includes a concentric large-diameter arc surface 231 and a small-diameter arc surface 232. One circumferential end of the small-diameter arc surface 232 and one circumferential end of the large-diameter arc surface 231 are connected by an arc-shaped groove 233. The other circumferential end of the small-diameter arc surface 232 is provided with a pressing protrusion 234, and the pressing protrusion 234 and the other circumferential end of the large-diameter arc surface 231 form a retaining groove 235. The locking protrusion 131 is an arc-shaped protrusion, and the retaining groove 235 is an arc-shaped retaining groove that is adapted to it.

[0102] like Figure 9 and Figure 10 As shown, when the top cover 2 is in the closed state, the locking protrusion 131 fits into the arc groove 233, which assists in limiting the closing limit position of the top cover 2. That is, there is also a locking effect between the locking protrusion 131 and the arc groove 233, which can prevent the top cover 2 from rotating further counterclockwise.

[0103] During the opening of the upper cover 2, the hinge 23 rotates clockwise, locking the protrusion 131 in sliding engagement with the small-diameter arc surface 232 until it reaches the position of pressing the protrusion 234, as shown. Figure 11 and Figure 12 As shown, when the upper cover 2 continues to open and the hinge 23 continues to rotate clockwise, the pressing protrusion 234 will press against the locking protrusion 131, thereby deforming the locking arm 13. This allows the pressing protrusion 234 to pass over the locking protrusion 131, while the locking protrusion 131 engages in the slot 235. Figure 13 and Figure 14 As shown, the position of the upper cover 2 is locked at this time, and the opening of the upper cover 2 reaches its maximum.

[0104] During the opening of the top cover 2, the locking protrusion 131 slides against the small-diameter arc surface 232 for most of the time, and the locking arm 13 does not deform. Therefore, the resistance to opening the top cover 2 is small, making it easy to operate. Only when the top cover 2 is opened to a certain extent will the pressing protrusion 234 press against the locking protrusion 131, causing the locking arm 13 to deform and thus pass over the locking protrusion 131 and engage the locking protrusion 131 in the slot 235. That is, only when the top cover 2 is about to be locked does it need to overcome a certain opening resistance, providing a signal that the top cover 2 is about to be opened to its limit. The closing process of the top cover 2 is the opposite. Only a slight force is needed at the beginning to rotate the top cover 2 counterclockwise, and the subsequent rotation process is very smooth.

[0105] It should be noted that one end of the top cover 2 is hinged to the plug housing 1 via a hinge pin 23, and the other end away from the hinge pin 23 is fixed to the plug housing 1 via screws or clips. The fixing method of this end is the same as that of the prior art, so this invention does not show it in detail.

[0106] In other embodiments, the locking part of the hinge 23 may be a slot provided on the outer circumferential surface of the complete cylinder. In this case, during the opening of the cover, the outer circumferential surface of the complete cylinder always presses against the locking protrusion 131, that is, the locking arm 13 is always in a deformed state, so there is a certain opening resistance. When the locking protrusion 131 is rotated into the slot, the locking arm 13 returns to its natural state.

[0107] In other embodiments, the locking part of the hinge 23 may be a locking protrusion protruding on the outer circumferential surface of the complete cylinder. In this case, the locking arm 13 is provided with a slot. During the opening of the cover, the locking protrusion on the outer circumferential surface of the complete cylinder will press against the locking arm 13 to deform it until the locking protrusion is inserted into the slot and the locking arm 13 returns to its natural state.

[0108] In this embodiment, the locking arm 13 extends straight out, with a locking protrusion 131 protruding only on the lower side. Compared with the end plate structure and the middle plate structure with arc-shaped mounting groove, the locking arm 13 has a smaller wall thickness and is easier to deform, thus reducing the resistance to opening and closing.

[0109] In other embodiments, in addition to the locking arm 13, a locking protrusion or a slot can also be provided on the wall of the mounting groove. In this case, a corresponding locking part is added to the hinge shaft 23, that is, a corresponding slot or locking protrusion is added. In other embodiments, the locking arm 13 may not be provided, and a locking protrusion or slot is only provided on the wall of the mounting groove to achieve locking of the top cover. In this case, a slot or locking protrusion is provided at the corresponding position of the hinge shaft 23.

[0110] Combination Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, the plug housing assembly in Embodiment 2 also includes a tail cap 3 that snaps onto the tail of the plug housing 1. A conductive bus 4 extends through the tail cap 3 into the interior of the plug housing 1 for wiring. The plug housing 1 is provided with a snap-fit ​​protrusion 15 for engaging with the tail cap 3 and a guide rib 16 for guiding the tail cap 3.

[0111] In fact, the plug housing assembly of Embodiment 1 also includes a tail cover. The difference between Embodiment 2 and Embodiment 1 is that the tail cover 3 of Embodiment 2 has an arc-shaped surface on the end facing the mounting groove for contacting the outer peripheral surface of the hinge shaft 23. The tail cover 3 can further prevent the hinge shaft 23 from coming out of the mounting groove by blocking and limiting it. That is, the anti-detachment protrusion 113 is only pre-positioned. On this basis, the arc-shaped surface of the tail cover 3 can block and limit it to ensure the installation stability of the upper cover 2.

[0112] Specifically, the top of the tail cap 3 has end stops 31 formed at both ends and a middle stop 32 formed in the middle. The end stops 31 have an end arc-shaped surface 311, and the middle stop 32 has a middle arc-shaped surface 321, resulting in a larger stopping area. The end stops 31 are narrower and are directly opposite the end mounting groove 111; the middle stop 32 is wider and is directly opposite both middle mounting grooves 121. In other embodiments, only two end stops 31, only one middle stop 32, or two middle stops 32 may be provided.

[0113] During assembly, first install the cover 2. After the hinge shaft 23 is inserted into the mounting groove, install the tail cover 3. The arc-shaped surface on the tail cover 3 effectively prevents the hinge shaft 23 from coming out. The top surface of the guide rib plate 16 gradually slopes downward from back to front. When installing the hinge shaft 23, if the hinge shaft 23 comes into contact with the guide rib plate 16, it can also play a guiding role.

[0114] In other embodiments, even if the tail cover 3 is present, it is not necessary to use the tail cover 3 for limiting the position. Instead, the anti-detachment protrusion in the mounting groove area is used for limiting and preventing detachment. That is, the tail cover 3 is no longer provided with a stop and an arc-shaped surface.

[0115] In other embodiments, such as Figure 15 and Figure 16 In the embodiment 3 shown, when the tail of the plug housing 1 is long, even if the tail cover is installed, the tail cover is too far from the hinge pin 23, and it is not suitable to set an arc surface on the tail cover. In this case, an anti-detachment protrusion 17 can be set on the top surface of the plug housing 1. The anti-detachment protrusion 17 is stronger than the anti-detachment protrusion 113 in embodiment 1. Therefore, it is not necessary to set an anti-detachment protrusion 113 on the end clamping plate structure 11. The anti-detachment protrusion 17 is sufficient. The anti-detachment protrusion 17 and the mounting groove cooperate to restrict the hinge pin 23 between the two.

[0116] Furthermore, the anti-detachment protrusion 17 has an arc-shaped surface on the side facing the mounting groove for contacting the outer peripheral surface of the hinge shaft 23, which, together with the arc-shaped groove wall of the mounting groove, facilitates the rotation of the hinge shaft 23. At the same time, the anti-detachment protrusion 17 has a guide slope on the side facing away from the mounting groove for guiding the hinge shaft 23 over the anti-detachment protrusion 17 to be forcibly inserted into the mounting groove, facilitating the assembly of the hinge shaft 23.

[0117] Furthermore, in Embodiment 3, there are two anti-detachment protrusions 17, and the two anti-detachment protrusions 17 are staggered from the mounting groove in the axial direction of the hinge shaft 23, so that the force on the hinge shaft 23 is more dispersed. In other embodiments, more than three anti-detachment protrusions 17 may be provided, or only one may be provided. When the number of anti-detachment protrusions is the same as the number of mounting grooves, each anti-detachment protrusion may be arranged directly opposite the mounting groove.

[0118] The plug in this invention is implemented as follows: the plug includes a housing assembly, and the specific structure of the housing assembly is the same as that of the plug housing assembly in any of the above embodiments, and will not be repeated here.

[0119] The fast charging connector of the present invention is implemented as follows: the fast charging connector includes a plug and a socket, the plug includes a housing assembly, and the specific structure of the housing assembly is the same as that of the plug housing assembly in any of the above embodiments, and will not be repeated here.

[0120] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A plug housing assembly, comprising a plug housing (1) and a top cover (2) hinged to the plug housing (1), characterized in that, A hinge (23) is fixedly connected to one of the components of the plug housing (1) and the top cover (2). The other component is provided with a mounting groove for the hinge (23) to be inserted and rotated with the hinge (23) and an anti-disengagement protrusion to prevent the hinge from disengaging. The size of the anti-disengagement protrusion is such that the hinge can be forced into the mounting groove by passing over the anti-disengagement protrusion. One of the mounting groove wall and the hinge (23) is provided with a slot, and the other is provided with a locking protrusion that is engaged in the slot to lock the position of the top cover when the top cover is opened to a certain extent. And / or, the component with the mounting groove is also provided with a cantilevered locking arm (13). One of the locking arm (13) and the hinge (23) is provided with a slot (235), and the other is provided with a locking protrusion (131) that is engaged in the slot (235) to lock the position of the top cover when the top cover is opened to a certain extent.

2. The plug housing assembly according to claim 1, characterized in that, The mounting slots include two end mounting slots (111) that mate with both ends of the hinge shaft (23) and a middle mounting slot (121) that mates with the middle of the hinge shaft (23).

3. The plug housing assembly according to claim 2, characterized in that, There are two central mounting slots (121) arranged at intervals, and the locking arm (13) is located between the two central mounting slots (121).

4. The plug housing assembly according to claim 3, characterized in that, The top surface of the plug housing (1) is provided with two end plate structures (11) and two middle plate structures (12). The end plate structures (11) are provided with the end mounting grooves (111), and the middle plate structures (12) are provided with the middle mounting grooves (121). The cover (2) includes a cover body (21) and two connecting parts (22) connected to the edge of the cover body (21) and arranged at intervals. The hinge shaft (23) is fixedly connected to the two connecting parts (22) and the two ends of the hinge shaft (23) are respectively suspended. The middle part of the hinge shaft (23), together with the cover body (21) and the two connecting parts (22), forms a clearance hole (24) for avoiding the two middle plate structures (12) and the locking arm (13).

5. The plug housing assembly according to any one of claims 2 to 4, characterized in that, The anti-detachment protrusions are provided in the slot areas of the two end mounting slots (111).

6. The plug housing assembly according to claim 5, characterized in that, The upper side of the two end mounting grooves (111) is connected to the extension walls (112) extending in opposite directions, and each end of the two extension walls (112) is provided with an anti-detachment protrusion.

7. The plug housing assembly according to any one of claims 2 to 4, characterized in that, The two end mounting slots (111) are respectively provided with closed sidewalls (114) at their far ends to cover the end face of the hinge shaft (23) and prevent the hinge shaft (23) from moving axially.

8. The plug housing assembly according to any one of claims 1 to 4, characterized in that, The mounting groove is provided on the plug housing (1) and the mounting groove has an arc-shaped groove wall that fits in contact with the outer peripheral surface of the hinge shaft (23). The plug housing assembly also includes a tail cap (3) that is snapped onto the tail of the plug housing (1). The end of the tail cap (3) facing the mounting groove has an arc-shaped surface for fitting in contact with the outer peripheral surface of the hinge shaft (23).

9. The plug housing assembly according to claim 8, characterized in that, The tail cap (3) has stop parts formed at both ends and in the middle of the top, and each stop part is provided with the aforementioned arc-shaped surface.

10. The plug housing assembly according to any one of claims 1 to 4, characterized in that, The mounting groove is located on the top of the plug housing (1), and the anti-detachment protrusion is located on the top surface of the plug housing (1). The mounting groove has an arc-shaped groove wall that fits and contacts the outer peripheral surface of the hinge shaft (23). The side of the anti-detachment protrusion facing the mounting groove has an arc-shaped surface for fitting and contacting the outer peripheral surface of the hinge shaft (23). The side of the anti-detachment protrusion facing away from the mounting groove has a guide slope for guiding the hinge shaft (23) past the anti-detachment protrusion to be forcibly inserted into the mounting groove.

11. The plug housing assembly according to claim 10, characterized in that, There are two or more anti-detachment protrusions, and each anti-detachment protrusion is staggered from the mounting groove in the axial direction of the hinge shaft (23).

12. The plug housing assembly according to any one of claims 1 to 4, characterized in that, The locking arm (13) is provided with the locking protrusion (131), and the hinge shaft (23) is provided with the slot (235). The hinge shaft (23) includes a locking part that cooperates with the locking arm (13). The locking part includes a concentric large-diameter arc surface (231) and a small-diameter arc surface (232). One circumferential end of the small-diameter arc surface (232) and one circumferential end of the large-diameter arc surface (231) are connected by an arc groove (233). The other circumferential end of the small-diameter arc surface (232) is provided with a pressing protrusion (234). The slot (235) is formed between the other end of the large-diameter arc surface (231) and the other end of the circumference; when the cover (2) is closed, the locking protrusion (131) fits into the arc groove (233); during the opening of the cover (2), the locking protrusion (131) slides into the small-diameter arc surface (232) until the top pressing protrusion (234) presses against the locking protrusion (131) to deform the locking arm (13) so that the top pressing protrusion (234) passes over the locking protrusion (131) and the locking protrusion (131) is engaged in the slot (235).

13. A plug, comprising a housing assembly, characterized in that, The housing assembly is the plug housing assembly as described in any one of claims 1 to 12.

14. A fast charging connector, comprising a plug and a socket, the plug including a housing assembly, characterized in that, The housing assembly is the plug housing assembly as described in any one of claims 1 to 12.

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