Water sprayer

Abstract

The utility model relates to a water sprayer which is provided with a storage device, and when a cover body is assembled at a first end, a shell can be completely shielded, so that the shell and the cover body can share a space required by storage during storage, namely, the shell and the cover body are prevented from occupying the storage space respectively, and the whole water sprayer is more compact in size and more convenient to use. The carrying is convenient; meanwhile, if the first end is covered with the cover body, the liquid spraying hole can be shielded through the cover body, and the liquid spraying hole is prevented from being polluted by foreign matter. And secondly, when the cover body is assembled at the second end, the cover body and the base can jointly define the liquid storage cavity, so that a special liquid storage container does not need to be additionally arranged, the production cost of the product is reduced, the space required for storage of the special liquid storage container is further omitted, and the compactness of the product is further effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical appliances, and more particularly to water sprayers. Background Technology

[0002] Water sprayers, as a convenient cleaning tool, are widely used in various fields such as homes, agriculture, and gardening. However, existing portable water sprayers still have some shortcomings in practical use, mainly in the following aspects:

[0003] First, most portable sprinklers on the market are equipped with a relatively large dedicated water storage device to achieve a large water volume. While this setup meets users' needs for water volume, the water storage device requires extra space when not in use, increasing the overall size of the device and reducing its portability.

[0004] Secondly, when the sprinkler is not in operation, its nozzles are often directly exposed, making it susceptible to contamination from the external environment, such as dust, sand, and other fine particles. Over time, these contaminants can not only affect the normal operation of the sprinkler but also shorten its lifespan and even damage its internal structure. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a water sprayer that can solve the problems of poor portability and easy contamination of the spraying part by pollutants.

[0006] This utility model provides a water sprayer, which includes:

[0007] A storage device includes a base, a housing, and a cover. The base has a first end and a second end. The housing is disposed on the first end and has a spray nozzle. The cover is configured to be detachably connected to either the first end or the second end.

[0008] A liquid spraying device includes a liquid pump and a liquid spraying channel. The liquid pump is connected to the liquid spraying channel. One end of the liquid spraying channel is exposed at a second end. The other end of the liquid spraying channel is connected to the liquid spraying hole. The liquid pump draws liquid from the second end through the liquid spraying channel and sprays it out through the liquid spraying hole.

[0009] When the cover is assembled at the first end, the cover and the base together shield the housing; when the cover is assembled at the second end, the cover and the base together define a liquid storage cavity, which is connected to the liquid spraying channel.

[0010] Preferably, a mounting ring is provided on the second end, and the inner wall of the mounting ring is provided with mounting threads, with the end of the spray channel exposed inside the mounting ring; or

[0011] The second end is provided with an installation groove, and the groove wall is provided with installation threads. The end of the liquid spraying channel is exposed in the installation groove.

[0012] Preferably, the liquid spraying channel includes a liquid guide column, a liquid guide tube, and a liquid guide channel. The liquid guide column is disposed on the base, one end of the liquid guide column is exposed at the second end, the other end of the liquid guide column is exposed at the first end and connected to the liquid guide tube, the liquid guide tube is connected to the input end of the liquid pump, the output end of the liquid pump is connected to the liquid guide channel, and the liquid guide channel is connected to the liquid spraying hole.

[0013] Preferably, the spray channel further includes a spray column, which is disposed on the inner sidewall of the housing. The liquid guiding channel extends through the spray column along its length. One end of the spray column is connected to the spray hole, and the other end of the spray column is connected to the liquid pump.

[0014] Preferably, the spray channel further includes a pump-out sealing ring, which is disposed on the spray column and is used to seal the spray column and the output end.

[0015] Preferably, the inner wall of the spray column is provided with a corner position, and the corner position is connected to the spray hole.

[0016] Preferably, a mounting groove is provided on the outer side wall of the housing, and the spray hole is located in the mounting groove;

[0017] The storage device further includes a spray guiding assembly, which includes a spray sealing ring, a spray element, and a holding ring. The spray sealing ring is inserted into the spray hole, and the spray element is disposed in the mounting groove and partially inserted into the spray sealing ring. The holding ring is detachably snapped onto the groove wall of the mounting groove, thereby limiting the holding ring and the spray element to be located within the mounting groove. The spray element is used to receive and guide the liquid flowing out of the spray hole.

[0018] Preferably, the first end is provided with a plug-in ring groove and a buckle, the housing is inserted into the plug-in ring groove, and each of the buckles is respectively snapped onto the inner side wall of the cover.

[0019] Preferably, both the periphery of the first end and the periphery of the second end are provided with mating surfaces, and each mating surface is provided with at least one raised profile.

[0020] The end of the cover is provided with a contoured surface, which is configured to align and fit onto the mating surface under the action of the cover.

[0021] Preferably, the second end is provided with a mating boss, and the end of the liquid spraying channel is exposed at the bottom of the mating boss;

[0022] The storage device also includes an annular sealing ring, which is disposed on the peripheral side wall of the mating boss. The mating boss is configured to be inserted into the cover body, so that the annular sealing ring seals against the inner wall of the cover body.

[0023] The following are the beneficial effects of implementing this utility model:

[0024] This utility model relates to a water sprayer, which is equipped with a storage device. When the cover is assembled at the first end, it can completely cover the shell, so that the shell and the cover can share the storage space when stored. That is, it avoids the shell and the cover occupying storage space separately, thus making the entire water sprayer more compact and easy to carry. At the same time, if the cover is placed on the first end, it can also cover the spray hole to prevent foreign objects from contaminating the spray hole.

[0025] Secondly, when the cover is assembled at the second end, the cover and the base can define the liquid storage chamber together, so there is no need to set up a special liquid storage container. This reduces the production cost of the product and further eliminates the space required for the storage of a special liquid storage container, thereby improving the compactness of the product. Attached Figure Description

[0026] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0027] Figure 1 This is a structural schematic diagram of the water sprayer in a certain state in some embodiments of this utility model;

[0028] Figure 2 This is an exploded view of the water sprayer in some embodiments of this utility model;

[0029] Figure 3 This is a schematic diagram of the internal structure of the water sprayer in another state in some embodiments of this utility model;

[0030] Figure 4 yes Figure 1 A schematic diagram of the internal structure of the water sprayer shown.

[0031] Figure 5 yes Figure 1 A schematic diagram of the internal structure of the water sprayer from another angle;

[0032] Figure 6 yes Figure 5 The enlarged view of the water sprayer at point A is shown. Detailed Implementation

[0033] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0034] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Figure 1 A water sprayer 10 is shown in some embodiments of the present invention. The water sprayer 10 is used to pressurize and pump liquid out.

[0038] like Figure 1 and Figure 2 As shown, the water sprayer 10 includes a receiving device 1 and a spraying device 2, with the spraying device 2 housed within the receiving device 1. Understandably, the receiving device 1 is used to receive the spraying device 2, and the spraying device 2 is used to pressurize and pump the liquid, allowing it to be sprayed out.

[0039] like Figures 1 to 5 As shown, the storage device 1 includes a base 11, a housing 12 and a cover 13. The base 11 is provided with a first end 111 and a second end 112. The housing 12 is disposed on the first end 111 and has a spray hole 121. The cover 13 is configured to be detachably connected to either the first end 111 or the second end 112.

[0040] The liquid spraying device 2 includes a liquid pump 21 and a liquid spraying channel 22. The liquid pump 21 is connected to the liquid spraying channel 22. One end of the liquid spraying channel 22 is exposed at the second end 112, and the other end of the liquid spraying channel 22 is connected to the liquid spraying hole 121. The liquid pump 21 draws liquid from the second end 112 through the liquid spraying channel 22 and sprays it out through the liquid spraying hole 121. When the cover 13 is assembled at the first end 111, the cover 13 and the base 11 together cover the housing 12. When the cover 13 is assembled at the second end 112, the cover 13 and the base 11 together define the liquid storage chamber 20, which is connected to the liquid spraying channel 22.

[0041] Understandably, the base 11 serves to support the remaining components. The housing 12 and the base 11 together protect the internal components. The spray hole 121 allows liquid to be sprayed out. The cover 13 is configured to be detachably connected to either the first end 111 or the second end 112, meaning that the cover 13 can be selectively mounted on either the first end 111 or the second end 112 depending on the actual usage requirements. When mounted on the first end 11, the cover 13 protects the spray hole 121, and when mounted on the second end 112, it forms the liquid storage chamber 20.

[0042] The liquid pump 21 is used to draw liquid from the liquid storage chamber 20 and spray it out through the spray hole 121. The spray channel 22 is used to transfer liquid from the liquid storage chamber 20 to the spray hole 121.

[0043] It should be noted that when the water sprayer is not in use, the cover 13 is attached to the first end 111 of the base 11. At this time, the cover 13 and the base 11 together cover the housing 12, making the entire water sprayer more compact and easier to carry. At the same time, the cover 13 can also cover the spray nozzle 121 to prevent dust and other foreign objects from entering and keep the water sprayer clean.

[0044] When the water sprayer is needed, the cover 13 is removed from the first end 111 and assembled to the second end 112 of the base 11. The cover 13 and the base 11 together define a liquid storage chamber 20, which is connected to the spray channel 22. The user can add liquid to the liquid storage chamber 20 and then start the liquid pump 21. The liquid will be drawn in through the spray channel 22 and sprayed out from the spray hole 121 to achieve the water spraying function.

[0045] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments of the water sprayer 10, a mounting ring 1121 is provided on the second end 112, and a mounting thread 1122 is provided on the inner wall of the mounting ring 1121, and the end of the spray channel 22 is exposed inside the mounting ring 1121.

[0046] Understandably, the mounting ring 1121 is ring-shaped and is used to fit the bottle opening of bottled water (such as bottled water commonly found in daily life). This allows the sprayer 10 to not only form the liquid storage chamber 20 required for spraying by assembling the cap 13, but also to directly insert the bottle opening of the bottled water into the mounting ring 1121 to directly use the liquid in the bottled water for spraying.

[0047] The mounting thread 1122 is used to screw into the thread at the neck of the bottled water to prevent the bottled water from coming off.

[0048] Furthermore, the mounting ring 1121 can be configured to be integrally formed on the base 11. It is understood that, through the embodiments of this utility model, the sealing between the mounting ring 1121 and the base 11 can be guaranteed, preventing liquid leakage through the gap between the mounting ring 1121 and the base 11.

[0049] In some embodiments of the water sprayer 10, a mounting groove is provided on the second end 112, and mounting threads are provided on the groove wall. The end of the spray channel 22 is exposed in the mounting groove 122.

[0050] Understandably, the mounting slot is for inserting the bottle neck of a bottled water container, and the mounting thread is also for screwing into the bottle neck of a bottled water container.

[0051] like Figures 2 to 6 As shown, in some embodiments of the water sprayer 10, the spray channel 22 includes a liquid guide column 221, a liquid guide pipe, and a liquid guide channel 222. The liquid guide column 221 is disposed on the base 11. One end of the liquid guide column 221 is exposed at the second end 112, and the other end of the liquid guide column 221 is exposed at the first end 111 and connected to the liquid guide pipe. The liquid guide pipe is connected to the input end 211 of the liquid pump 21, and the output end 212 of the liquid pump 21 is connected to the liquid guide channel 222. The liquid guide channel 222 is connected to the spray hole 121.

[0052] Understandably, the main function of the liquid guide column 221 is to serve as part of the liquid transfer path from the liquid storage chamber 20 to the liquid pump 21, ensuring that the liquid can smoothly enter the liquid pump 21. The function of the liquid guide tube is to guide the liquid from the liquid guide column 221 to the input end 211 of the liquid pump 21, ensuring that the liquid can be effectively drawn into the liquid pump 21. The main function of the liquid guide channel 222 is to transfer the liquid pumped out by the liquid pump 21 to the spray hole 121, and finally spray it out from the spray hole 121.

[0053] like Figures 4 to 6 As shown, in some embodiments of the water sprayer 10, the spray channel 22 further includes a spray column 223, which is disposed on the inner side wall of the housing 12. The liquid guiding channel extends along the length of the spray column, one end of the spray column 223 is connected to the spray hole 121, and the other end of the spray column 223 is connected to the liquid pump 21.

[0054] Understandably, the main function of the spray column 223 is to serve as a direct connection channel between the liquid pump 21 and the spray hole 121, ensuring that the liquid can be efficiently and stably transferred from the liquid pump 21 to the spray hole 121.

[0055] like Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments of the water sprayer 10, the spray channel 22 further includes a pump-out sealing ring 224, which is disposed on the spray column 223 and is used to seal the spray column 223 and the output end 212.

[0056] Understandably, the pump outlet seal 224 is mainly used to seal the connection between the liquid spray column 223 and the output end 212 of the liquid pump 21. The main function of the pump outlet seal 224 is to ensure that the liquid does not leak during transmission, thereby improving the reliability and safety of the water sprayer 10.

[0057] like Figure 6 As shown, in some embodiments of the water sprayer 10, a corner position 225 is provided on the inner wall of the spray column 223, and the corner position 225 is connected to the spray hole 121.

[0058] Understandably, the corner position 225 is designed to prevent the pumped liquid from directly impacting the spray hole 121, allowing the liquid to fill the spray column 223 first, and then be guided to the corner position 225 through the spray column 223. This ensures that the liquid can fill the spray hole 121 as much as possible, while also ensuring the continuity of the spray.

[0059] like Figure 2 and Figure 5As shown, in some embodiments of the water sprayer 10, a mounting groove 122 is provided on the outer side wall of the housing 12, and the spray hole 121 is located in the mounting groove 122; the mounting groove 122 is used to install the spray guide assembly 14.

[0060] The storage device 1 also includes a spray guide assembly 14, which includes a spray sealing ring 141, a spray element 142, and a retaining ring 143. The spray sealing ring 141 is inserted into the spray hole 121, the spray element 142 is disposed in the mounting groove 122 and partially inserted into the spray sealing ring 141, and the retaining ring 143 is detachably snapped onto the groove wall of the mounting groove 122, thereby limiting the retaining ring 143 and the spray element 142 to be located in the mounting groove 122. The spray element 142 is used to receive the liquid flowing out of the spray hole 121 and guide it to be sprayed out.

[0061] Understandably, the spray sealing ring 141 is inserted into the spray hole 121, and its main function is to ensure the seal between the spray hole 121 and the spray element 142 to prevent liquid leakage. The spray element 142 is disposed in the mounting groove 122 and partially inserted into the spray sealing ring 141. The main function of the spray element 142 is to receive the liquid flowing out of the spray hole 121 and guide it out, ensuring the concentration and directionality of the liquid spray. The retaining ring 143 is detachably snapped onto the groove wall of the mounting groove 122, and the retaining ring 143 confines the spray element 142 within the mounting groove 122. The retaining ring 143 makes the installation and removal of the spray element 142 more convenient, and facilitates maintenance and replacement.

[0062] like Figure 2 and Figure 4 As shown, in some embodiments of the water sprayer 10, the first end 111 is provided with a plug-in ring groove 1111 and a buckle 1112, the housing 12 is inserted into the plug-in ring groove 1111, and each buckle 1112 is respectively snapped onto the inner side wall of the cover 13.

[0063] Understandably, the insertion groove 1111 allows the housing 12 to be securely fixed to the first end 111 of the base 11, ensuring a tight connection between the housing 12 and the base 11 and preventing loosening or detachment during use. The snap fastener 1112 allows the cover 13 to be securely fixed to the first end 111, ensuring a tight connection between the cover 13 and the base 11 and preventing accidental opening during carrying or use.

[0064] like Figure 2 As shown, in some embodiments of the water sprayer 10, the periphery of the first end 111 and the periphery of the second end 112 are provided with mating surfaces 1113, and each mating surface 1113 is provided with at least one protruding profile 1114; the end of the cover 13 is provided with a contoured surface 133, which is configured to align and fit onto the mating surface 1113 under the action of the cover 13.

[0065] Understandably, the mating surface 1113 is designed to ensure that the cover 13 fits tightly against the surface of the base 11 when assembled to the first end 111 or the second end 112, thereby improving sealing and stability. The main function of the raised profile 1114 is to provide positioning and guidance, ensuring that the cover 13 is accurately aligned during assembly and preventing misalignment. In addition, the raised profile 1114 can increase the friction of the contact surfaces, further improving the tightness of the connection between the cover 13 and the base 11.

[0066] like Figure 2 As shown, in some embodiments of the water sprayer 10, the second end 112 is provided with a mating boss 1123, and the end of the spray channel 22 is exposed at the bottom of the mating boss 1123.

[0067] The storage device 1 also includes an annular sealing ring 15, which is disposed on the peripheral side wall of the mating boss 1123. The mating boss 1123 is configured to be inserted into the cover 13, so that the annular sealing ring 15 seals against the inner wall of the cover 13.

[0068] Understandably, the design of the mating boss 1123 allows for better positioning and protection of the end of the liquid spray channel 22, while also providing a convenient interface for the assembly of the cover 13. The main function of the annular sealing ring 15 is to seal against the inner wall of the cover 13 when the mating boss 1123 is inserted into it, ensuring that liquid does not leak from the gap between the mating boss 1123 and the cover 13.

[0069] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments of the water sprayer 10, the water sprayer 10 also includes a support device 3, which includes a base 31 and a bottom shell 32. The bottom shell 32 is configured to be detachably mounted on the second end 112 and can be placed on the base 31.

[0070] Understandably, the bottom shell 32 is smaller than the cover 13, so the bottom shell 32 cannot be fitted onto the first end 111. When the bottom shell 32 is assembled onto the second end 112, the storage device 1 can be fixed by placing the bottom shell 32 onto the base 31.

[0071] When it is necessary to assemble the cover 13 onto the second end 112, the bottom shell 32 can be removed (the bottom shell 32 can be left on the base 31 to prevent loss), and then the cover can be assembled onto the second end 112 accordingly.

[0072] The following are the beneficial effects of implementing this utility model:

[0073] This utility model relates to a water sprayer, which is equipped with a storage device. When the cover is assembled at the first end, it can completely cover the shell, so that the shell and the cover can share the storage space when stored. That is, it avoids the shell and the cover occupying storage space separately, thus making the entire water sprayer more compact and easy to carry. At the same time, if the cover is placed on the first end, it can also cover the spray hole to prevent foreign objects from contaminating the spray hole.

[0074] Secondly, when the cover is assembled at the second end, the cover and the base can define the liquid storage chamber together, so there is no need to set up a special liquid storage container. This reduces the production cost of the product and further eliminates the space required for the storage of a special liquid storage container, thereby improving the compactness of the product.

[0075] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the modules in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0076] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A water sprayer, characterized in that, include: A storage device includes a base, a housing, and a cover. The base is provided with a first end and a second end. The housing is disposed on the first end and has a spray hole. The cover is configured to be detachably connected to either the first end or the second end. and A liquid spraying device includes a liquid pump and a liquid spraying channel. The liquid pump is connected to the liquid spraying channel. One end of the liquid spraying channel is exposed at a second end. The other end of the liquid spraying channel is connected to the liquid spraying hole. The liquid pump draws liquid from the second end through the liquid spraying channel and sprays it out through the liquid spraying hole. When the cover is assembled at the first end, the cover and the base together shield the housing; when the cover is assembled at the second end, the cover and the base together define a liquid storage cavity, which is connected to the liquid spraying channel.

2. The water sprayer according to claim 1, characterized in that, A mounting ring is provided on the second end, and a mounting thread is provided on the inner wall of the mounting ring. The end of the liquid spray channel is exposed inside the mounting ring; or The second end is provided with an installation groove, and the groove wall is provided with installation threads. The end of the liquid spraying channel is exposed in the installation groove.

3. The water sprayer according to claim 1 or 2, characterized in that, The liquid spraying channel includes a liquid guide column, a liquid guide tube, and a liquid guide channel. The liquid guide column is disposed on the base, with one end of the liquid guide column exposed at the second end and the other end of the liquid guide column exposed at the first end and connected to the liquid guide tube. The liquid guide tube is connected to the input end of the liquid pump, the output end of the liquid pump is connected to the liquid guide channel, and the liquid guide channel is connected to the liquid spraying hole.

4. The water sprayer according to claim 3, characterized in that, The spray channel also includes a spray column, which is disposed on the inner side wall of the housing. The liquid guiding channel extends through the spray column along its length. One end of the spray column is connected to the spray hole, and the other end of the spray column is connected to the liquid pump.

5. The water sprayer according to claim 4, characterized in that, The spray channel also includes a pump-out sealing ring, which is disposed on the spray column and is used to seal the spray column and the output end.

6. The water sprayer according to claim 4, characterized in that, The inner wall of the spray column is provided with a corner position, which is connected to the spray hole.

7. The water sprayer according to claim 1, characterized in that, An installation groove is provided on the outer side wall of the housing, and the liquid spraying hole is located in the installation groove; The storage device further includes a spray guiding assembly, which includes a spray sealing ring, a spray element, and a holding ring. The spray sealing ring is inserted into the spray hole, and the spray element is disposed in the mounting groove and partially inserted into the spray sealing ring. The holding ring is detachably snapped onto the groove wall of the mounting groove, thereby limiting the holding ring and the spray element to be located within the mounting groove. The spray element is used to receive and guide the liquid flowing out of the spray hole.

8. The water sprayer according to claim 1, characterized in that, The first end is provided with a plug-in ring groove and a buckle. The housing is inserted into the plug-in ring groove, and each of the buckles is respectively snapped onto the inner side wall of the cover.

9. The water sprayer according to claim 1, characterized in that, Both the periphery of the first end and the periphery of the second end are provided with mating surfaces, and each of the mating surfaces is provided with at least one raised profile. The end of the cover is provided with a contoured surface, which is configured to align and fit onto the mating surface under the action of the cover.

10. The water sprayer according to claim 1, characterized in that, The second end is provided with a mating boss, and the end of the liquid spraying channel is exposed at the bottom of the mating boss; The storage device also includes an annular sealing ring, which is disposed on the peripheral side wall of the mating boss. The mating boss is configured to be inserted into the cover body, so that the annular sealing ring seals against the inner wall of the cover body.

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