Cover body structure of liquid reservoir

Abstract

A cover body structure of a liquid reservoir comprises a cover body, a connecting port and a limiting piece. The connecting port is formed in the top of the cover body; the limiting piece is arranged on the side wall of the connecting opening, and when a screwing part arranged on the connecting component of the connector is screwed into the lower side of the limiting piece, the limiting piece limits the connector to move in the axial direction of the cover body; a seepage channel is formed in the limiting piece, so that paint adhered to the side wall of the connecting port passes through the limiting piece through the seepage channel. According to the technical scheme, the seepage channel allowing the paint to penetrate through is formed in the limiting piece, when the liquid reservoir is placed on the table top and the connecting opening faces upwards, the paint is prevented from being left or solidified on the outer wall of the connecting opening in the upper side of the limiting piece, and therefore the problems that the liquid reservoir is difficult to install and chippings fall into a spray gun are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of spray painting equipment, and in particular relates to a cover structure for a liquid reservoir. Background Technology

[0002] A reservoir generally refers to a paint cup, which is used to store paint. When in use, it is connected to a spray gun to spray out the paint inside.

[0003] Patent No. 201921120639.8, entitled "A Storage Cap, Nut and Spray Gun Storage Connecting Mechanism", discloses a storage cap with a locking protrusion protruding from the nozzle of the cap body. The transverse stop arm of the locking protrusion provides a stop surface, thereby limiting the axial displacement of the nut installed on the spray gun relative to the cap.

[0004] However, during spray painting operations, the reservoir cap is often removed from the spray gun when changing paint types. When the reservoir is placed with the nozzle facing upwards, the paint adhering to the nozzle seeps down the outer wall of the nozzle and is blocked by a locking protrusion, thus solidifying on the outer wall of the nozzle above the locking protrusion. When the reservoir is reinstalled on the spray gun, the solidified paint causes the outer diameter of that part of the nozzle to increase, making it difficult to insert the nozzle into the spray gun. If the nozzle is forcibly inserted, the solidified paint will break off into particles under the external force, entering the spray gun and causing blockages. Spray guns are expensive, and if the paint particles blocking the spray gun cannot be removed, the spray gun will be completely unusable, resulting in huge economic losses. Even if the paint particles can be removed, not only is the cleaning difficult, but the cleaning process will also cause the painting operation to be stopped, extending the construction cycle. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cap structure for a liquid reservoir, which solves the problem that the current reservoir cap easily traps and solidifies the adhering paint on the upper outer wall of the locking protrusion, making it difficult to reinstall the reservoir into the spray gun and causing the spray gun to become blocked if it is forcibly installed.

[0006] This utility model provides a cover structure for a liquid reservoir, comprising:

[0007] Cover;

[0008] The connection port is located on the top of the cover;

[0009] A limiting element is provided on the side wall of the connection port. When the screw-in part of the connecting member of the connector is screwed into the lower side of the limiting element, the limiting element restricts the connector from moving axially in the cover.

[0010] The limiting component has a seepage channel to allow paint adhering to the side wall of the connection to pass through the limiting component via the seepage channel.

[0011] This technical solution incorporates a seepage channel on the limiting component that allows paint to pass through. When the reservoir is placed on the table with the connection port facing upwards, it prevents paint from remaining or solidifying on the outer wall of the connection port on the upper side of the limiting component, thereby eliminating the difficulties in installing the reservoir and the problem of debris falling into the spray gun.

[0012] In some embodiments, the limiting member has a protrusion that restricts the rotation of the connector on the cover by engaging with the connecting member of the connector.

[0013] This technical solution uses a protrusion to limit the rotation of the connector, preventing the connector from rotating excessively and detaching from the connection and fixing area below the limiting component.

[0014] In some embodiments, the upper surface of the limiting member is located on a plane perpendicular to the axis of the cover;

[0015] The connecting component is set on the end face of the connector. When the upper surface of the limiting component is attached to the end face of the connector, the screw-in part is aligned with the space below the limiting component.

[0016] This technical solution uses a flush upper limiting component to engage with the end face of the connector, thereby limiting the axial installation of the reservoir and the spray gun. This allows the screw-in part to quickly align with the connection and fixing area and screw in, ensuring smooth connection and installation.

[0017] In some embodiments, the lower surface of the limiting member has a guide surface for sliding contact with the screw-in portion, and the guide surface is inclined downward.

[0018] This technical solution improves the firmness of the connection between the cover structure and the joint by setting an inclined surface on the lower side of the limiting component to guide the screw-in of the screw-in part and make the limiting component press down on it.

[0019] In some embodiments, the connecting member has a boss, and a screw-on portion is disposed on the boss; the outer surface of the limiting member is attached to the inner surface of the boss and is interference-fitted therewith.

[0020] This technical solution improves the robustness of the connection between the cover structure and the joint by ensuring that the limiting part and the connecting component are in close contact in the radial direction.

[0021] In some embodiments, the limiting member includes at least two limiting posts, and the seepage channel is located between two adjacent limiting posts.

[0022] This technical solution uses multiple spaced limiting posts to limit the joint screw connection and form a seepage channel, resulting in a simple structure that is easy to process and manufacture.

[0023] In some embodiments, the limiting post is divided into a stop post and a guide post.

[0024] The connecting member has a boss, one side of which is connected to the end face of the connector, and the other side is connected to the screw joint.

[0025] When the stop post abuts against the end face of the boss and / or the end face of the screw joint, it restricts the rotation of the joint on the cover.

[0026] This technical solution uses a limiting post as a stop post to limit the screwing in of the rotating joint.

[0027] In some embodiments, the stop post is raised relative to the guide post in the radial and / or axial direction of the cover.

[0028] This technical solution simplifies the design of the limiting structure by using a more prominent limiting post in the axial or radial direction of the cover as a stop post.

[0029] In some embodiments, the lower surface of the limiting member has a guide surface for sliding contact with the screw-in portion, the guide surface is inclined downward, and at least two guide posts arranged in succession constitute the guide surface.

[0030] This technical solution utilizes continuously arranged guide posts to form a guide surface, which not only achieves the tightening of the screw joint after it is screwed in, but also provides tactile feedback of progressive tightening during the screwing process. This allows users to ensure that the liquid reservoir is installed in place and securely by means of tactile feedback when installing it onto the nozzle connector.

[0031] In some embodiments, the lower surface of the guide post is an arc surface, a curved surface, or a spherical surface.

[0032] This technical solution sets the surface of the guide post to a smooth surface, ensuring that the guide post will not jam the screw joint when it forms a guiding surface, allowing the screw joint to smoothly pass through multiple guide posts to reach the fully screwed-in position.

[0033] In some embodiments, the stop post is located in the middle or at one end of the limiting member.

[0034] This technical solution allows the screw joint to be screwed in from one side or in both directions, improving the flexibility of connection and installation.

[0035] In some embodiments, when the stop post is located at one end of the limiting member, the side wall of the stop post away from the guide post is provided with a tangent parallel to the axis of the cover.

[0036] In this technical solution, the stop post at one end allows the screw-in part to be screwed in only in one direction, and the tangential surface of the stop post allows the screw-in part to be smoothly pulled off the cover when it comes into contact with the stop post in the opposite direction.

[0037] In some embodiments, the cross-section of the limiting post is circular, elliptical, or triangular.

[0038] This technical solution not only facilitates the molding of the limiting post, but also allows for a larger opening at the top of the seepage channel, ensuring that the paint passes through the limiting component.

[0039] In some embodiments, the upper surface of the limiting post is an arc surface or a curved surface.

[0040] This technical solution allows for a larger opening at the top of the seepage channel, ensuring that the paint passes through the limiting component.

[0041] In some embodiments, the limiting posts are arranged parallel to each other on a plane perpendicular to the axis of the cover.

[0042] This technical solution ensures smooth demolding of the limiting posts during thermoplastic processing by arranging them in parallel.

[0043] In some embodiments, the limiting member is a stop bar, and the seepage channel is a through hole or guide groove formed on the stop bar.

[0044] This technical solution creates seepage channels by opening holes or cutting grooves in the strip, providing more structural options for the cover and avoiding problems caused by paint residue or concrete buildup.

[0045] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0046] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0047] Figure 1 This is a three-dimensional structural diagram of the cover structure of the reservoir according to the embodiments of this application when the cross-section of the limiting post is circular;

[0048] Figure 2 This is a side view of the cover structure of the reservoir according to an embodiment of this application when the cross-section of the limiting post is circular;

[0049] Figure 3 This is a top view of the cover structure of the reservoir according to an embodiment of this application when the cross-section of the limiting post is circular;

[0050] Figure 4 for Figure 2 A magnified view of a portion of the image;

[0051] Figure 5 This is a schematic diagram of the connector structure according to an embodiment of this application;

[0052] Figure 6This is a side view of the cover structure of the reservoir according to an embodiment of this application when the cross-section of the limiting post is triangular;

[0053] Figure 7 This is a side view of the cover structure of the reservoir according to the embodiments of this application when the upper surface of the limiting post is an arc surface;

[0054] Figure 8 This is a side view of the cover structure of the reservoir according to the embodiment of this application with the stop bar in place of the limiting member;

[0055] In the picture:

[0056] 1. Cover; 2. Connection port;

[0057] 3. Limiting component; 30. Connecting and fixing area; 301. Protrusion; 302. Guide surface; 303. Limiting post; 3031. Stop post; 3032. Guide post; 304. Cut surface;

[0058] 4. Joint; 40. Connecting component; 401. Screw-in joint; 402. Boss;

[0059] 5. Seepage channels. Detailed Implementation

[0060] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0061] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0062] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0063] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0064] In this application, the spray gun for spray painting has a connector 4, which is integrally connected to the spray gun or detachably installed on the spray gun. The connector 4 is used to connect a liquid reservoir, thereby fixing the liquid reservoir to the spray gun and supplying the paint stored in the liquid reservoir to the spray gun, so that the paint is sprayed out through the spray gun to realize the spray painting operation.

[0065] like Figures 1 to 8 As shown in an illustrative embodiment of the liquid reservoir cover structure of this utility model, the liquid reservoir cover structure includes a cover 1, a connecting port 2, and a limiting member 3. The connecting port 2 is located on the top of the cover 1, and the limiting member 3 is located on the side wall of the connecting port 2, with at least one limiting member 3 provided.

[0066] The reservoir has a reservoir cup for holding paint. A cover 1 is installed on the reservoir cup to seal the mouth of the reservoir cup. The connection port 2 on the cover 1 is the only channel for connecting the reservoir cup to the external space. When the reservoir is installed on the spray gun, the connection port 2 is inserted into the connector 4 of the spray gun, and the connecting member 40 on the connector 4 fixes the reservoir to the connector 4.

[0067] To facilitate the installation and disassembly of the liquid reservoir, the connector 4 is screwed in to achieve a fixed connection with the liquid reservoir. More specifically, the connecting member 40 of the connector 4 has a screw-in portion 401. After the connector 4 is inserted into the connecting port 2 of the cover 1, the liquid reservoir or the connector 4 is rotated, causing the screw-in portion 401 to rotate relative to the connecting port 2. This screws the screw-in portion 401 into the lower part of the limiting member 3, causing the limiting member 3 to lock the screw-in portion 401, thereby preventing the screw-in portion 401 from moving axially in the cover 1, thus ensuring that the connector 4 is stably connected to the connecting port 2 of the cover 1.

[0068] When the paint needs to be changed during the spraying operation, the current reservoir needs to be removed. By rotating the spray gun or the reservoir, the screw-on part 401 is rotated relative to the cover 1, so that the screw-on part is spun out of the space below the limiting member 3, eliminating the restriction of the limiting member 3 on the axial movement of the screw-on part 401, so that the screw-on part 401 is axially disengaged from the connection port 2 of the cover 1, and the reservoir is disengaged from the connector 4.

[0069] The removed reservoir is placed on the work surface with the connector 2 facing upwards to prevent paint spillage. However, when the reservoir is installed on the spray gun for painting, paint from the reservoir enters the connector 4 through connector 2. Some of the paint seeps into the gap between the connector 4 and connector 2, adhering to the side wall of connector 2 when the reservoir is removed. When the reservoir is placed on the work surface with connector 2 facing upwards, the adhered paint flows down the side wall of connector 2 and falls onto the protruding limiting member 3. If the paint solidifies on the upper side of limiting member 3, the solidified paint will cause the outer diameter of that part of connector 2 to become thicker, making it difficult to insert connector 2 into connector 4. Even if connector 2 is forcibly inserted, the solidified paint will turn into debris and enter the connector 4, subsequently entering the spray gun and causing it to become clogged.

[0070] The limiting member 3 of this application has a seepage channel 5. The seepage channel 5 passes through the limiting member 3. When the reservoir is placed on the table with the connection port 2 facing upward, the adhering paint flows down the side wall of the connection port 2 to the limiting member 3. The paint will then pass through the seepage channel 5 and flow to the lower side of the limiting member 3, preventing the paint from staying on the connection port 2 on the upper side of the limiting member 3. This avoids the connection port 2 becoming too thick and difficult to insert, and prevents debris from entering the spray gun and causing it to become blocked if it is forcibly inserted into the connector 4.

[0071] The lower side of the limiting member 3 forms a connection and fixing area 30. After the screw part 401 of the connector 4 is screwed into the connection and fixing area 30 from one end, if the movement stroke of the screw part 401 cannot be precisely controlled, the screw part 401 may be screwed out of the connection and fixing area 30 from the other end, which will cause the limiting member 3 to be unable to effectively limit and fix the screw part 401, and thus cause the liquid reservoir to be unable to be effectively fixed on the connector 4 of the spray gun.

[0072] Therefore, in some embodiments, such as Figures 1 to 4 and Figure 8 As shown, the limiting member 3 has a protrusion 301. After the screw-in part 401 of the connector 4 is screwed into the connection fixing area 30 from one end, the screw-in part 401 on the connecting member 40 or other parts of the connecting member 40 will be stuck in the protrusion 301. The protrusion 301 blocks the movement of the connecting member 40, thereby restricting the screw-in part 401 within the connection fixing area 30 and preventing the screw-in part 401 from being screwed out from the other end of the connection fixing area 30. This ensures that the limiting member 3 effectively limits and fixes the screw-in part 401, thereby keeping the liquid reservoir effectively fixed on the connector 4 of the spray gun.

[0073] In some embodiments, such as Figure 2 , Figure 4 and Figure 8As shown, the upper surface of the limiting member 3 is located on a plane perpendicular to the axis of the cover 1. The connecting member 40 is disposed on the end face of the connector 4. When the upper surface of the limiting member 3 is attached to the end face of the connector 4, the screw-in part 401 is aligned with the space below the limiting member 3, so that the screw-in part 401 can be smoothly screwed into the connection fixing area 30 below the limiting member 3.

[0074] By engaging the upper surface of the limiting member 3 with the end face of the connector 4, the connection port 2 is positioned to fit into the connector 4, so that the screw-on part 401 is aligned with the connection fixing area 30 and screwed in. This eliminates the need for the connecting member 40 of the connector 4 to push downward against the end face of the cover 1. The limiting member 3 can move further away from the end face of the cover 1, and the screw-on part 401 can move closer to the end face of the connector 4, reducing the axial thickness of the connecting member 40 and making the structure of the connector 4 more compact.

[0075] In some embodiments, such as Figure 4 and Figure 8 As shown, the lower surface of the limiting member 3 has a guide surface 302, which is inclined downward.

[0076] When the connecting and fixing area 30 is formed between the limiting member 3 and the end face of the cover 1, the downwardly inclined guide surface 302 causes the width of the connecting and fixing area 30 to gradually narrow along the screw-in direction provided by the screw-in part 401. When the screw-in part 401 is screwed into the connecting and fixing area 30, as the number of screw-in parts gradually increases, the limiting member 3 and the end face of the cover 1 firmly clamp the screw-in part 401, thereby improving the stability of the limiting and fixing of the screw-in part 401 and enhancing the stability of the liquid reservoir installed on the spray gun connector 4.

[0077] When the contact engagement between the end face of the connector 4 and the limiting member 3 is achieved to limit the screw-in part 401 so that it is aligned with the connection fixing area 30, as the screw-in part 401 enters the connection fixing area 30 along the provided screw-in direction, the screw-in part 401 will slide along the downwardly inclined guide surface 302, so that the limiting member 3 gradually presses down on the screw-in part 401 through the guide surface 302, firmly pressing the end face of the connector 4 onto the limiting member 3, which can also improve the stability of the liquid reservoir installed on the spray gun connector 4.

[0078] In some embodiments, such as Figure 5 As shown, the connecting member 40 on the connector 4 has a boss 402, and the screw-on part 401 is provided on the boss 402. When the upper part of the connecting port 2 is inserted into the connector 4, the boss 402 is located on the outer side of the lower part of the connecting port 2, so that the limiting member 3 is located on the inner side of the boss 402.

[0079] The outer surface of the limiting member 3 is attached to the inner surface of the boss 402, so that the limiting member 3 and the boss 402 are interference fit. Together with the screw-in part 401, they are screwed into the connection and fixing area 30 on the lower side of the limiting member 3, so as to achieve a stable connection between the liquid reservoir and the connector 4 and improve the stability of the liquid reservoir after installation.

[0080] In some embodiments, such as Figures 1 to 4 As shown, the limiting member 3 includes at least two limiting posts 303, which are arranged along the screw-in direction provided by the screw joint 401, and the interval between two adjacent limiting posts 303 forms a seepage channel 5.

[0081] Compared to setting the limiting member 3 as a strip component and forming the seepage channel 5 by opening holes or slots in the strip component, using the limiting posts 303 arranged in sequence to form the limiting member 3 requires less material, has lower cost, and can be processed by thermoplastic molding to form the limiting posts 303 and form the seepage channel 5, making production and manufacturing easier.

[0082] Furthermore, such as Figures 1 to 4 As shown, the limiting post 303 is divided into a stop post 3031 and a guide post 3032. The connecting member 40 has a boss 402, one side of which is connected to the end face of the connector 4, and the other side is connected to the screw joint 401.

[0083] When the limiting member 3 has a protrusion 301 to limit the rotation of the connector 4 on the cover 1, the protrusion 301 is formed on the stop post 3031. The screw-in part 401 screws into the connection fixing area 30 on the lower side of the limiting member 3. When the end face of the boss 402 and / or the end face of the screw-in part 401 contacts the stop post 3031, the stop post 3031 abuts against either of them to limit the rotation of the connector 4 on the cover 1, that is, to prevent further movement of the screw-in part 401, and to prevent the screw-in part 401 from moving too far out of the connection fixing area 30. This allows the limiting member 3 to stably limit and fix the screw-in part 401, that is, to keep the liquid reservoir stably installed on the connector 4.

[0084] like Figure 3 As shown, when the outer surface of the limiting member 3 is interference-fitted with the inner surface of the boss 402, the outer end faces of the guide post 3032 are all located on the same circumference centered on the axis of the cover 1.

[0085] Furthermore, such as Figures 1 to 3As shown, the stop post 3031 protrudes relative to the guide post 3032 in the radial and / or axial direction of the cover 1. More specifically, the stop post 3031 protrudes outward in the radial direction of the cover 1 relative to the guide post 3032. When the screw-in part 401 is screwed into the connection fixing area 30, the guide post 3032 moves inside the boss 402, and the outer end of the protruding stop post 3031 is locked on the end of the boss 402, thereby restricting the rotation of the connector 4 on the cover 1 and limiting the screw-in part 401 in the connection fixing area 30 below the limiting member 3. The stop post 3031 protrudes axially relative to the guide post 3032 in the cover 1, so that the stop post 3031 extends further into the connection fixing area 30 than the guide post 3032. When the screw-in part 401 is screwed into the connection fixing area 30, the lower side of the stop post 3031 is locked on the end of the screw-in part 401, thereby restricting the rotation of the connector 4 on the cover 1 and limiting the screw-in part 401 in the connection fixing area 30 below the limiting member 3.

[0086] By employing at least one of the two protrusion methods mentioned above, the stop post 3031 can effectively limit the rotation of the joint 4. That is, by simply expanding the shape of the stop post 3031 in any direction of the axial and radial directions of the cover 1, the rotation of the joint 4 can be effectively limited. The implementation method is simple and easy to manufacture. The stop post 3031, which is larger in size than the guide post 3032, can be produced by thermoplastic molding.

[0087] Furthermore, such as Figure 4 As shown, when the lower surface of the limiting member 3 has a downwardly inclined guide surface 302, at least two consecutively arranged guide posts 3032 constitute the guide surface 302. The guide posts 3032 can be arranged with their outer diameters increasing sequentially along the screw-in direction provided by the screw-in part 401, or with the same outer diameter, the guide posts 3032 can be arranged sequentially along the screw-in direction provided by the screw-in part 401 at an inclined angle. Ultimately, the line connecting the lowest points of each guide post 3032 is inclined downward relative to the plane perpendicular to the axis of the cover 1. Even if the lower surfaces of the sequentially arranged guide posts 3032 combine to form the guide surface 302, the screw-in part 401 will be clamped firmly as the space gradually decreases during the screwing into the connection and fixing area 30. Alternatively, the guide posts 3032 will pass through each other sequentially and exert pressure on the screw-in part 401. This will improve the stability of the liquid reservoir installed on the spray gun connector 4 by setting the inclined guide surface 302 on the lower surface of the limiting member 3.

[0088] Furthermore, the lower surface of the guide post 3032 is an arc surface, a curved surface, or a spherical surface, making the lower plane of the guide post 3032 a smooth surface. This allows the screw-in part 401 to slide to the lower side of the guide post 3032 under the guidance of the smooth surface after it makes lateral contact with the guide post 3032, and then move to the next adjacent guide post 3032. This avoids the sharp corners on the lower surface of the guide post 3032 from hindering the screw-in movement of the screw-in part 401.

[0089] In some embodiments, the stop post 3031 is located in the middle or at one end of the limiting member 3.

[0090] When the stop post 3031 is located in the middle of the limiting member 3, guide posts 3032 are arranged on both sides of the stop post 3031, thereby forming two connection and fixing areas 30 on the lower side of the limiting member 3, respectively located on both sides of the stop post 3031. The screw joint 401 can be screwed into the corresponding connection and fixing area 30 from the lower side of both ends of the limiting member 3 through two rotation directions, realizing the bidirectional torsional connection between the connector 4 and the liquid reservoir, and improving the flexibility of the connection and installation of the liquid reservoir.

[0091] When the stop post 3031 is located at one end of the limiting member 3, the screw-in part 401 can only be screwed into the connection fixing area 30 through the end of the limiting member 3 away from the stop post 3031. When it is necessary to remove the reservoir, the screw-in part 401 rotates in the opposite direction of the screwing-in direction, and the screw-in part 401 abuts against the side of the stop post 3031 away from the guide post 3032, so as to prevent the screw-in part 401 from entering the connection fixing area 30 again and being limited and fixed when it rotates in the opposite direction, thereby ensuring that the reservoir can be smoothly removed.

[0092] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, when the stop post 3031 is located at one end of the limiting member 3, a tangent 304 parallel to the axis of the cover 1 is provided on the side wall of the stop post 3031 away from the guide post 3032.

[0093] When the reservoir needs to be removed, the screw-in part 401 rotates in the opposite direction to the screw-in direction and abuts against the side of the stop post 3031 away from the guide post 3032. The stop post 3031 has a cut surface 304 on this side, so that the screw-in part 401 can slide smoothly along the cut surface 304 and then disengage from the limiting member 3, so that the connector 4 can be smoothly removed from the reservoir. This avoids the surface of the stop post 3031 away from the guide post 3032 from protruding and causing obstruction to the axial disengagement of the screw-in part 401.

[0094] In addition, the cut surface 304 can reduce the smoothness of the surface of the stop post 3031, that is, a relatively sharp corner is formed at the upper and lower edges of the cut surface 304. When the screw-in part 401 rotates in the opposite direction of the screw-in direction and abuts against the stop post 3031, the corner formed by the cut surface 304 can lock the screw-in part 401 and prevent the screw-in part 401 from sliding to the lower surface of the stop post 3031, thereby preventing the screw-in part 401 from being screwed into the connection and fixing area under the limiting member again, thus avoiding the difficulty of pulling the connector 4 out of the reservoir.

[0095] In some embodiments, the cross-section of the limiting post 303 is circular, elliptical, or triangular.

[0096] like Figures 1 to 4 As shown, when the limiting post 303 is circular or elliptical, it is not only easy to thermoform, but the flow channel 5 is hourglass-shaped with an upward-expanding top, which increases the opening at the top of the flow channel 5, making it easier for the paint to flow into the flow channel 5 and accelerating the speed at which the paint passes through the limiting member 3, thus preventing the paint from solidifying on the upper side of the limiting member 3. Secondly, the circular or elliptical cross-section of the limiting post 303 makes its upper surface smooth, which has a better effect on the flow of the paint, making it easier for the paint to slide into the flow channel 5 after contacting the limiting post 303, and less likely to remain on the surface of the limiting post 303. In addition, when the limiting member 3 needs to be provided with an inclined guide surface 302, the circular or elliptical cross-section of the limiting post 303 can directly ensure the smooth screwing of the screw-in part 401 without causing jamming of the screwing part. Figure 6 As shown, when the limiting post 303 adopts a triangle, one corner is at the top and the other two corners are at the bottom, forming a V-shaped seepage channel 5. This can also increase the opening at the top of the seepage channel 5, making it easier for the paint to flow into the seepage channel 5.

[0097] In some embodiments, the upper surface of the limiting post 303 is an arc surface or a curved surface. More specifically, as shown in the figure... Figure 7 As shown, the limiting post 303 can adopt a cross-sectional shape with only the upper surface being smooth, so that the top of the seepage channel 5 is flared from bottom to top, increasing the opening at the top of the seepage channel 5, making it easier for the paint to flow into the seepage channel 5; in addition, making the upper surface of the limiting post 303 smooth has a better guiding effect on the paint, making it easier for the paint to slide into the seepage channel 5 after contacting the limiting post 303, and less likely to remain on the surface of the limiting post 303.

[0098] In some embodiments, such as Figure 3 As shown, the limiting posts 303 are all arranged in parallel on a plane perpendicular to the axis of the cover 1.

[0099] To facilitate manufacturing, the cover body 1 structure is produced using thermoplastic molding. During processing, two molds move towards each other, clamping the blank in the middle from both sides. The inner surface of the molds has molding grooves; air is injected into the blank, causing it to expand and fill the molding grooves, thus shaping the blank into the cover body 1 structure with the predetermined outline. The two molds then move away from the formed cover body 1 structure, completing the demolding of the cover body 1 structure. To achieve the mold movement, the molds are generally driven by hydraulic cylinders, with the two molds moving towards or away from each other along the same straight line.

[0100] The limiting posts 303 are all arranged in parallel, that is, parallel to the moving direction of the two molds. This ensures that during demolding, the limiting posts 303 can directly disengage from the corresponding forming grooves on the mold, preventing deformation of the limiting posts 303 and improving manufacturing accuracy. Furthermore, when a limiting post 303 needs to become a stop post 3031 with a relatively larger external dimension, only the width and / or depth of the corresponding forming groove needs to be increased. This allows the machined stop post 3031 to protrude in either the radial or axial direction of the cover 1, abutting against the connecting member 40 to achieve rotational limiting.

[0101] In some embodiments, such as Figure 8 As shown, the limiting member 3 is a stop strip, and the seepage channel 5 is a through hole or guide groove opened on the stop strip, so that the paint can pass through the limiting member 3 through the seepage channel 5, and avoid the paint from being left on the upper side of the limiting member 3 and solidifying.

[0102] The flow of paint is achieved by opening holes or grooves in the stop strip. The solution for modifying the existing structure by opening holes or grooves can also be applied for. This provides more structural forms for the cover 1 structure, enabling smooth installation of the reservoir and avoiding spray gun blockage. It provides modification space and improves structural flexibility.

[0103] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0104] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A cap structure of a reservoir, characterized by, The utility model relates to a cover body, a connecting port arranged on the top of the cover body, a limiting piece arranged on the sidewall of the connecting port, a connecting member of a connector, a rotating part of the connecting member is screwed into the lower side of the limiting piece, the limiting piece limits the axial movement of the connector on the cover body, a seepage channel is arranged on the limiting piece, paint adhered to the sidewall of the connecting port passes through the seepage channel and the limiting piece. The limiting piece has a protruding part, the protruding part limits the rotation of the connector on the cover body by clamping the connecting member of the connector. The upper side surface of the limiting piece is located on a plane perpendicular to the axis of the cover body. The connecting member is arranged on the end surface of the connector, the upper side surface of the limiting piece is attached to the end surface of the connector, and the rotating part is aligned with the space below the limiting piece. The lower side surface of the limiting piece has a guide surface for sliding contact with the rotating part, and the guide surface is arranged downwardly inclined.

2. The cap structure of the reservoir according to claim 1, wherein The connecting member has a boss, the rotating part is arranged on the boss, the outer side surface of the limiting piece is attached to the inner side surface of the boss, and the outer side surface of the limiting piece is interference fit with the inner side surface of the boss.

3. The cap structure of the reservoir according to claim 1, wherein The limiting piece includes at least two limiting columns, and the seepage channel is located between adjacent two limiting columns. The limiting column is divided into a stop column and a guide column, 4. The cap structure for a reservoir according to claim 1, wherein The connecting member has a boss, one side of the boss is connected to the end surface of the connector, and the other side of the boss is connected to the rotating part.

5. The cap structure for a reservoir according to claim 1, wherein When the stop column abuts against the end surface of the boss and / or the end surface of the rotating part, the stop column limits the rotation of the connector on the cover body.

6. The cap structure of a reservoir according to any one of claims 1 to 5, wherein In the radial direction and / or axial direction of the cover body, the stop column is protruded relative to the guide column.

7. The cap structure for a reservoir according to claim 6, wherein The lower side surface of the guide column is an arc surface, a curved surface or a spherical surface. The stop column is located in the middle or one end of the limiting piece. When the stop column is located in one end of the limiting piece, a side wall away from the guide column of the stop column is provided with a tangent plane parallel to the axis of the cover body.

8. The cap structure for a reservoir according to claim 7, wherein The cross section of the limiting column is circular, elliptical or triangular.

9. The cap structure for a reservoir of claim 7, wherein, The upper side surface of the limiting column is an arc surface or a curved surface.

10. The cap structure for a reservoir of claim 7, wherein, The limiting columns are arranged in parallel on a plane perpendicular to the axis of the cover body.

11. The cap structure for a reservoir of claim 7, wherein, The limiting piece is a stop bar, and the seepage channel is a through hole or a flow guide groove arranged on the stop bar.

12. The cap structure for a reservoir of claim 6, wherein, ​ 13. The cap structure for a reservoir of claim 6, wherein, ​ 14. The cap structure for a reservoir of claim 6, wherein, ​ 15. The cap structure for a reservoir according to any one of claims 1 to 5, wherein ​

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