Cup cover assembling device and adapter

Abstract

The utility model provides a cup lid assembly device and adapter, including lid body and adapter, the liquid outlet of lid body is provided with first connection feature, the inlet area of adapter is provided with second connection feature, first connection feature and second connection feature wedge combination makes lid body and adapter link, and the adapter is connected with the lid body. The liquid outlet of the cover body and the inlet of the adapter are matched with a two-way limiting mechanism, the first connecting feature and the second connecting feature are combined to be in a locking state, the two-way limiting mechanism is stopped at the locking limiting point, the first connecting feature and the second connecting feature are separated from each other, and the two-way limiting mechanism is stopped at the splitting limiting point. According to the connecting system, wedge-shaped locking matching is adopted, specifically, a two-way limiting mechanism is additionally arranged, and a wedge-shaped locking point position and a limiting stop point position are separated, so that stress areas are differentiated, stress concentration is eliminated, fatigue damage caused by connecting characteristics is avoided, it is guaranteed that the cover and the adapter are assembled in place, the mounting precision, tightness and firmness can be kept, and the service life of the cover and the adapter is prolonged. The service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to spraying equipment technical field relates to a connection structure of spraying cup and spray gun, especially a cup cover assembly device and adapter. BACKGROUND

[0002] The current spray gun mainly adopts the pneumatic mode to atomize paint and then sprays, so paint needs to be provided to the spray gun. At present, a common way is to connect a paint supply cup to the spray gun. This way can ensure that the supply cup and the spray gun move simultaneously and that paint is continuously pressed into the spray gun by gravity and then sprayed out after being atomized by compressed gas. The liquid outlet of the paint supply cup is connected to the spray gun through a connecting nut (or adapter), so it can be seen that ensuring good cooperation between the paint supply cup and the connecting nut (or adapter) is an important prerequisite for effective paint supply. In addition, the convenient disassembly and assembly of the paint supply cup and the connecting nut (or adapter) are also one of the considerations of the qualification standard.

[0003] For example, the wide-mouth fluid connector for a handheld spray gun, spray gun reservoir connector system is disclosed in Chinese patent document AU2017207357B2. The system includes a reservoir cap, a spray gun inlet, and complementary first and second connector formats. The first and second connector formats are equipped with one of the cap or the spray gun inlet. The first format includes a plurality of retention structures, each defining a capture region. The retention structures are collectively arranged in a circular pattern. The second format includes a plurality of locking structures, each including a grommet body configured to selectively engage with the capture regions. The connector formats are configured to provide a wedge-shaped engagement between the locking structures and the corresponding retention structures as the spray gun inlet is rotated relative to the cap. The cap can include a spray opening. The retention and locking structures are radially spaced apart outside the spray opening, and the spray opening can have an inner diameter of no less than 22 mm.

[0004] In the above technical solution, the reservoir cap and the adapter are matched through the complementary first and second connector formats, and the first and second connector formats form a locking assembly through wedge-shaped engagement. As shown in its accompanying Figure 10 And 11 The locking structure as the connector format is disclosed in the specification, which has a wedge-shaped locking surface. The expansion height of the end 336 of the locking structure to the second end 338, i.e., the position of the second end 338 is low in the wedge angle to form a locking position, and the position of the end 336 is high in the wedge angle to form a disengagement position. The stopper 334 is arranged at the second end 338 (locking position). When the first and second connector formats are wedge-shaped locked, the stopper 334 at the locking position is limited to stop the screwing action in the locking direction.

[0005] As shown in its accompanying Figure 10Obviously, the wedge-shaped body 362 of the support body 360 can correspond to the gasket body 332 entering the locking structure, when one end of the wedge-shaped body 362 is screwed to the locking position, and at the same time, the end of the wedge-shaped body 362 presses the stop body 334 to form a stop, because the adapter is usually made of steel metal, and the locking structure on the liquid reservoir cover is integrally injection molded by plastic, the second end 338 of the locking structure is subjected to wedge extrusion and limiting pressure at the same time, after repeated cooperation for a long time, the locking and positioning stress can easily cause the second end 338 to be damaged due to fatigue, resulting in problems such as wear, deformation and the like, and then the cooperation is misaligned, and problems such as tightness and firmness of the connection are reduced. Content of the Utility Model

[0006] The utility model aims at the above-mentioned problems existing in the prior art, and provides a cup cover assembling device and an adapter.

[0007] The utility model discloses a cup cover assembling device, including the cover body and the adapter, the first connecting feature is set up on the liquid outlet of the cover body, the second connecting feature is set up in the import area of the adapter, the first connecting feature and the second connecting feature wedge-shaped combination makes the cover body and the adapter be connected, the liquid outlet of the cover body and the import of the adapter are equipped with two-way limiting mechanism, the first connecting feature and the second connecting feature are combined to the locking state, the two-way limiting mechanism is stopped in the locking limiting point, the first connecting feature and the second connecting feature are separated from each other, and the two-way limiting mechanism is stopped in the split limiting point.

[0008] In the cup cover assembling device, the outer circumference of the liquid outlet of the cover body is divided into a locking area and a limiting area, one end of the locking area is a locking end, the other end of the locking area is a separation end, one end of the limiting area is the locking limiting point, and the other end of the limiting area is the split limiting point; the locking end of the locking area corresponds to the split limiting point of the limiting area, and the separation end of the locking area corresponds to the locking limiting point of the limiting area.

[0009] In the cup cover assembling device, the first connecting feature is a wedge-shaped section provided on the outer circumference of the liquid outlet, the surface of the wedge-shaped section towards the cover body is a wedge-shaped surface, the wedge-shaped surface gradually approaches the cover body to a low end point to form a locking end, and the wedge-shaped surface gradually moves away from the cover body to a high end point to form a separation end; the second connecting feature is a hook provided in the import area of the adapter, the hook has a hook body bent towards the central axis of the adapter, the surface of the hook body towards the import direction of the adapter is a clamping surface, and the clamping surface is specifically a plane or an inclined plane; and the hook is combined with the wedge-shaped surface of the wedge-shaped section through the clamping surface.

[0010] In the cup cover assembly device, the bidirectional limiting mechanism comprises a limiting block arranged on the adapter, the limiting block is arranged at the inlet area of the adapter, one side of the limiting block is provided with a locking stop surface, the other side of the limiting block is provided with a disassembly stop surface, the wedge surface gradually moves away from the cover body to the high end point to form a locking limiting point, the wedge surface gradually approaches the cover body to the low end point to form a disassembly limiting point, the locking stop surface of the limiting block contacts the locking limiting point to form a locking stop state, and the disassembly stop surface of the limiting block contacts the disassembly limiting point to form a disassembly stop state.

[0011] In the cup cover assembly device, the first connecting feature has an assembly stroke greater than the length of the second connecting feature, and the second connecting feature is spaced from the bidirectional limiting mechanism by a positioning distance. In the wedge combination state, part of the body of the first connecting feature protrudes from the second connecting feature and is located in the positioning distance.

[0012] In the cup cover assembly device, the inlet of the adapter is provided with a first connecting structure, the outer wall of the cover body is provided with a second connecting structure, the inlet of the adapter is sleeved with the liquid outlet of the cover body and rotates, and the first connecting structure and the second connecting structure form axial limiting.

[0013] In the cup cover assembly device, the first connecting structure is a platform arranged around the inlet, the top surface of the platform is a limiting surface one, the bottom surface of the platform is provided with the second connecting feature and the bidirectional limiting mechanism, the second connecting structure is a claw arranged around the liquid outlet, the claw has a support body, the top end of the support body protrudes a claw head towards the liquid outlet, the claw head towards the bottom surface of the cover body is a limiting surface two, the inlet of the adapter is butted with the liquid outlet of the cover body, and the limiting surface two and the limiting surface one form a stop cooperation.

[0014] In the cup cover assembly device, the platform is provided with a notch between the second connecting feature and the bidirectional limiting mechanism, and the claw head cooperates with the notch to guide into the limiting surface one of the platform.

[0015] An adapter, one end of the adapter is an inlet, the other end is an outlet, the inlet area of the adapter is provided with a second connecting feature and a bidirectional limiting mechanism, the second connecting feature cooperates with a first connecting feature of a cover body, the first connecting feature and the second connecting feature are combined to a locking state, the bidirectional limiting mechanism is stopped at a locking limiting point, the first connecting feature and the second connecting feature are separated from each other, and the bidirectional limiting mechanism is stopped at a disassembly limiting point.

[0016] In the adapter described above, the second connecting feature is spaced apart from the bidirectional limiting mechanism by a positioning distance, the second connecting feature is a clasp with a clamping surface, one end of the clamping surface is a locking point, and the other end of the clamping surface is a separation point; the bidirectional limiting mechanism includes a limiting block, one side of the limiting block is provided with a locking stop surface, and the other side of the limiting block is provided with a separation stop surface; the positioning distance is arranged between the separation point and the locking stop surface.

[0017] Compared with the prior art, the cup cover assembly device and the adapter have the following beneficial effects:

[0018] 1. The connection system adopts wedge-shaped locking cooperation, specifically by adding a bidirectional limiting mechanism, the wedge-shaped locking point and the limiting stop point are separated, thereby differentiating the stress area, eliminating stress concentration, avoiding fatigue damage of the connecting feature, ensuring that the cover and the adapter are assembled in place, and maintaining the accuracy, tightness and firmness of the installation, effectively prolonging the service life of the cover, ensuring continuous and stable paint supply effect, and maintaining good paint spraying operation.

[0019] 2. The bidirectional limiting cooperation mode can quickly achieve locking positioning, avoid excessive force leading to misalignment and tripping due to excessive cooperation, improve assembly safety, and accurately reach the separation position to quickly separate the cover and the adapter. Thus, convenient and accurate installation and rapid separation are achieved to optimize disassembly operation, improve disassembly efficiency, and improve operation experience. The clear rotation direction and locking and separation instructions enable users to quickly understand the assembly and disassembly steps during use, reducing operation complexity and being suitable for a wide range of users.

[0020] 3. The wedge-shaped segment itself has a structure with two endpoints, cooperates with the limiting block of the adapter, separates the locking limiting point and the separation limiting point, and forms a bidirectional limiting design. The traditional structure of the cover does not need to be improved, thereby facilitating injection mold opening, reducing production cost and difficulty, and enabling the same adapter to cooperate with multiple forms of covers to expand the use range and increase flexibility.

[0021] 4. The clasp cooperates with the wedge-shaped segment, the pawl cooperates with the platform, and multiple cooperation points are distributed around the liquid outlet of the cover, thereby achieving multiple locking effects of the cover and the adapter in different directions. In the case of applying external force in a certain direction, the coaxiality of the assembly is maintained, the stability and firmness of the connection are enhanced, and loosening or falling caused by external force is avoided.

[0022] 5. The layout of the notch and the pawl in the design enables better force application during rotation, avoiding slipping; the design takes into account the user's operation habit, and through reasonable notch and finger force application position, the operation is more natural and smooth, improving the user's comfort during operation.

[0023] 6、Through reasonable spacing design and structure arrangement, the waste of materials is reduced, and lightweight design is realized under the premise of ensuring strength. Such structure not only improves production efficiency, but also helps to reduce production cost. The structural design of the device can be applied to various types of cup covers and adapters for docking, has strong universality and flexibility, and can meet different market demands.

[0024] In summary, the cup cover assembly device has remarkable superiority in precision, reliability, convenience, functionality, safety, user experience and other aspects, and has good market application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an exploded perspective structural view of the first embodiment of the cup cover assembly device.

[0026] Figure 2 It is an assembly perspective structural view of the locking position of the first embodiment of the cup cover assembly device.

[0027] Figure 3 It is an assembly perspective structural view of the split position of the first embodiment of the cup cover assembly device Figure 1 .

[0028] Figure 4 It is an assembly perspective structural view of the split position of the first embodiment of the cup cover assembly device Figure 2 .

[0029] Figure 5 It is a perspective structural view of the adapter in the cup cover assembly device.

[0030] Figure 6 It is a front view structural view of the adapter in the cup cover assembly device.

[0031] Figure 7 It is a bottom view structural view of the adapter in the cup cover assembly device.

[0032] Figure 8 It is an exploded perspective structural view of the second embodiment of the cup cover assembly device.

[0033] Figure 9 It is an assembly perspective structural view of the locking position of the second embodiment of the cup cover assembly device.

[0034] Figure 10 It is an assembly perspective structural view of the split position of the second embodiment of the cup cover assembly device Figure 1 .

[0035] Figure 11 It is an assembly perspective structural view of the split position of the second embodiment of the cup cover assembly deviceFigure 2 .

[0036] Figure 12 Assembled perspective view of the cup connection system.

[0037] In the figure, 1, cover body; 2, liquid outlet; 2a, locking area; 2b, limiting area; 3, wedge-shaped section; 3a, wedge surface; 3b, locking end; 3c, separation end; 3d, locking limiting point; 3e, disassembly limiting point; 4, clamping jaw; 4a, support body; 4b, jaw head; 4c, limiting surface two; 5, connecting ring; 6, adapter; 6a, inlet; 6b, outlet; 6c, positioning interval; 7, platform; 7a, limiting surface one; 7b, notch; 8, clamping hook; 8a, clamping surface; 8b, locking point; 8c, separation point; 9, limiting block; 9a, locking stop surface; 9b, disassembly stop surface; 10, threaded section; 11, rigid outer cup; 12, outer clamping ring; 13, spray gun. DETAILED DESCRIPTION

[0038] The following is a specific embodiment of the present application and further describes the technical solution of the present application in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0039] As Figures 1 to 11 shown, the cup cover assembly device comprises a cover body 1 and an adapter 6, a first connecting feature is arranged on the liquid outlet 2 of the cover body 1, a second connecting feature is arranged in the inlet 6a area of the adapter 6, the first connecting feature and the second connecting feature are wedge-shaped combined to connect the cover body 1 and the adapter 6, the liquid outlet 2 of the cover body 1 and the inlet 6a of the adapter 6 are matched with a bidirectional limiting mechanism, the first connecting feature and the second connecting feature are combined to a locked state, the bidirectional limiting mechanism is stopped at the locking limiting point 3d, the first connecting feature and the second connecting feature are separated from each other, and the bidirectional limiting mechanism is stopped at the disassembly limiting point 3e.

[0040] Through the screwing action, the first connecting feature and the second connecting feature are gradually transitioned from the gap matching area to the locking matching area, and the bidirectional limiting mechanism is exactly stopped for screwing in to prevent misalignment and tripping caused by excessive force during screwing in, thereby effectively protecting the connecting features. Through the unscrewing action, the first connecting feature and the second connecting feature are gradually transitioned from the locking matching area to the gap matching area, and finally the two are completely separated, and the bidirectional limiting mechanism is exactly stopped for unscrewing, thereby achieving precise positioning to directly implement two opposite forces to quickly separate the two, thereby improving the disassembly efficiency.

[0041] As Figure 1 and 8As shown, preferably, the outer circumference of the outlet 2 of the cover 1 is divided into locking areas 2a and limiting areas 2b. One end of the locking area 2a is a locking end 3b, and the other end of the locking area 2a is a separation end 3c. One end of the limiting area 2b is a locking limiting point 3d, and the other end of the limiting area 2b is a disassembly limiting point 3e. The locking end 3b of the locking area 2a corresponds to the disassembly limiting point 3e of the limiting area 2b, and the separation end 3c of the locking area 2a corresponds to the locking limiting point 3d of the limiting area 2b.

[0042] The locking end 3b of the locking area 2a corresponds to the disassembly limiting point 3e of the limiting area 2b, specifically, the two different functional features of the locking end 3b and the disassembly limiting point 3e are located at the same position. The separation end 3c of the locking area 2a corresponds to the locking limiting point 3d of the limiting area 2b, specifically, the two different functional features of the separation end 3c and the locking limiting point 3d are located at the same position.

[0043] The locking area 2a and the limiting area 2b are alternately arranged, that is, one limiting area 2b is arranged between two locking areas 2a, and one locking area 2a is arranged between two limiting areas 2b. When the rotation-in or rotation-out action is performed, the first connecting feature and the second connecting feature rotate relative to each other, synchronously driving the bidirectional limiting mechanism to rotate, so that when the first connecting feature and the second connecting feature are locked in place, the bidirectional limiting mechanism is matched to the locking limiting point 3d at the same time; when the first connecting feature and the second connecting feature are separated, the bidirectional limiting mechanism is matched to the disassembly limiting point 3e at the same time.

[0044] As shown in Figure 1 and 8 As shown, preferably, the first connecting feature is a wedge-shaped section 3 arranged on the outer circumference of the outlet 2. The surface of the wedge-shaped section 3 facing the surface of the cover 1 is a wedge-shaped surface 3a. The wedge-shaped surface 3a gradually approaches the cover 1 to form a locking end 3b at the low end point, and gradually moves away from the cover 1 to form a separation end 3c at the high end point. The outlet 2 is a circular pipe interface. Two arc-shaped protrusions are symmetrically distributed on the outer circumferential wall of the circular pipe interface to form the wedge-shaped section 3. The lower surface of the wedge-shaped section 3 is inclined at a certain angle to form the wedge-shaped surface 3a. The area between the wedge-shaped surface 3a and the cover 1 is the locking area 2a. The outer wall of the outlet 2 between the two adjacent wedge-shaped sections 3 forms the limiting area 2b.

[0045] As shown in Figures 5 to 7 The second connecting feature is a hook 8 arranged on the inlet area of the adapter 6. The hook 8 is combined with the wedge-shaped surface 3a of the wedge-shaped section 3 through a clamping surface 8a. A platform 7 is arranged on the inlet 6a of the adapter 6. Two hooks 8 are protruded on the bottom surface of the platform 7, and the two hooks 8 are centrally symmetrically arranged.

[0046] Preferably, the hook 8 has a hook body bent towards the central axis of the adapter 6, and the surface of the hook body towards the inlet direction of the adapter 6 is a clamping surface 8a, which is specifically a flat surface or an inclined surface. The clamping surface 8a can be provided as a flat surface, which forms a wedge-shaped locking with the wedge surface 3a through point contact; or the clamping surface 8a can be provided as an inclined surface, which forms a wedge-shaped locking with the wedge surface 3a through surface contact, so that the locking strength of surface contact is greater.

[0047] As shown in Figures 1 to 7 Preferably, the bidirectional limiting mechanism includes a limiting block 9 provided on the adapter 6, the limiting block 9 is arranged in the inlet area of the adapter 6, one side of the limiting block 9 is provided with a locking stop surface 9a, and the other side of the limiting block 9 is provided with a disassembly stop surface 9b, the wedge surface 3a gradually forms a locking limiting point 3d away from the cover body 1 to the high position end point, and the wedge surface 3a gradually forms a disassembly limiting point 3e close to the cover body 1 to the low position end point, the locking stop surface 9a of the limiting block 9 contacts the locking limiting point 3d to form a locking stop state, and the disassembly stop surface 9b of the limiting block 9 contacts the disassembly limiting point 3e to form a disassembly stop state.

[0048] As shown in Figure 2 and 9 The first connecting feature has an assembly stroke greater than the length of the second connecting feature, and the second connecting feature is spaced apart from the bidirectional limiting mechanism by a positioning distance 6c. In the wedge-shaped combined state, part of the body of the first connecting feature extends out of the second connecting feature and is located in the positioning distance 6c.

[0049] The second connecting feature is designed to be separated from the bidirectional limiting mechanism, so that the bidirectional limiting mechanism can provide two different direction limiting features. The length of the first connecting feature is the length of the assembly stroke, and the total length of the second connecting feature connecting the positioning distance is equal to the length of the assembly stroke, so that when the first connecting feature reaches the locking end, the bidirectional limiting mechanism just reaches the locking limiting point.

[0050] As shown in Figures 5 to 7 The platform 7 is provided on the inlet 6a of the adapter 6, two limiting blocks 9 are protruded on the bottom surface of the platform 7, the two limiting blocks 9 are arranged in central symmetry, one hook 8 cooperates with one limiting block 9 to form a group, and the hook 8 and the limiting block 9 are arranged alternately. Figures 1 to 4As shown, a reasonable distance is set between the hook 8 and the limiting block 9 in each group. When the cover 1 and the adapter 6 are connected and rotated clockwise, the hook 8 rotates along the locking area 2a, simultaneously causing the limiting block 9 to rotate forward within the limiting area 2b, until the locking stop surface 9a of the limiting block 9 contacts the locking limit point 3d of the wedge segment 3, stopping the adapter 6 from continuing to rotate clockwise. The hook surface 8a of the hook 8 and the wedge surface 3a of the wedge segment 3 are just locked in place. When the connected cover 1 and adapter 6 are rotated counterclockwise, the hook 8 rotates in the opposite direction along the locking area 2a, simultaneously causing the limiting block 9 to rotate within the limiting area 2b, until the split stop surface 9b of the limiting block 9 contacts the split limit point 3e of the wedge segment 3, stopping the adapter 6 from continuing to rotate counterclockwise. The hook surface 8a of the hook 8 and the wedge surface 3a of the wedge segment 3 are completely disengaged, and the adapter 6 is pulled off the cover 1.

[0051] like Figures 8 to 11 As shown, in a further optimized implementation, the inlet 6a of the adapter 6 protrudes from the outer periphery of the first connecting structure, and a second connecting structure is provided on the outer wall of the cover 1. The inlet 6a of the adapter 6 is sleeved onto the outlet 2 of the cover 1 and rotates, and the first connecting structure and the second connecting structure form an axial limit.

[0052] Preferably, the first connecting structure is a platform 7 arranged around the inlet 6a. The top surface of the platform 7 is a limiting surface 7a. The bottom surface of the platform 7 is provided with a second connecting feature and a bidirectional limiting mechanism. The second connecting structure is a claw 4 arranged around the outlet 2. The claw 4 has a support body 4a. The top of the support body 4a protrudes into the claw head 4b towards the outlet 2. The bottom surface of the claw head 4b facing the cover 1 is a limiting surface 4c. The inlet 6a of the adapter 6 is connected to the outlet 2 of the cover 1. The limiting surface 4c and the limiting surface 7a form a stop fit.

[0053] The platform 7 protruding from the outer periphery of the adapter 6 inlet 6a resembles a flange structure and is roughly an annular plate. Platform 7 provides space for the arrangement of the hooks 8 and the limiting blocks 9, and also provides a stop surface for the claws 4. There are two claws 4, symmetrically arranged on both sides of the outlet 2. The limiting surface 4c of the claw 4 can be either a plane or an inclined plane; when the limiting surface 4c is a plane, a clearance fit is formed between the planar limiting surface 4c and the limiting surface 7a when the adapter 6 and the cover 1 rotate relative to each other; when the limiting surface 4c is an inclined plane, the inclined limiting surface 4c and the limiting surface 7a gradually press together to form an interference fit after the relative rotation of the adapter 6 and the cover 1.

[0054] like Figures 5 to 11As shown, preferably, the platform 7 is provided with a notch 7b between the second connecting feature and the bidirectional limiting mechanism, and the claw head 4b is matched with the notch 7b to guide the limiting surface one 7a of the platform 7. The bottom surface of the platform 7 is centrally symmetrically provided with two groups of clamping hooks 8 and limiting blocks 9, and the part of the platform 7 between each group of clamping hooks 8 and limiting blocks 9 forms a notch 7b, and each notch 7b corresponds to a clamping claw 4. Two effects are achieved through the notch 7b: first, the depth of the notch 7b corresponds to the elongated part of the claw head 4b, and the notch 7b is aligned with the clamping claw 4 during docking, and the notch 7b provides a space for the clamping claw 4 to allow the clamping claw 4 to pass through the notch 7b to the upper side of the platform 7, and then through the rotating movement, the clamping claw 4 is dislocated with the notch 7b, and the limiting surface two 4c of the clamping claw 4 enters the limiting surface one 7a of the platform 7 to form a stop cooperation. Second, the notch 7b forms a recess structure on the circumferential contour of the platform 7, and when the adapter 6 and the cover body 1 are manually screwed, the fingers can be embedded in the notch 7b to perform screwing force, thereby avoiding slipping, reducing locking force, and ensuring the locking effect.

[0055] As shown in the drawings, Figure 8 Preferably, the center arrangement point of the clamping claw 4 and the center arrangement point of the first connecting feature have an included angle with the axis of the liquid outlet 2 as the center. Around the axis of the liquid outlet 2, the two wedge-shaped segments 3 are separated by 180°, the two clamping claws 4 are separated by 180°, and the adjacent wedge-shaped segment 3 and the clamping claw 4 are separated by 90°. The two wedge-shaped segments 3 and the two clamping claws 4 form a cross point around the liquid outlet 2, so that after the cover body 1 and the adapter 6 are docked and locked, four different point axial locking points are formed. Even if the adapter 6 is moved in an inclined direction, the coaxiality of the adapter 6 and the liquid outlet 2 can be ensured, and the stability and firmness of the connection between the adapter 6 and the cover body 1 are improved.

[0056] As shown in the drawings, Figures 5 to 7 An adapter, one end of the adapter 6 is an inlet 6a, and the other end is an outlet 6b. The inlet 6a is a port for liquid to flow in, and the outlet 6b is a port for liquid to flow out. The inlet 6a is connected with the liquid outlet 2 of the cover body 1, and the outlet 6b is connected with the liquid supply port of the spray gun 13.

[0057] The inlet 6a region of the adapter 6 is provided with a second connecting feature and a bidirectional limiting mechanism. The second connecting feature is matched with the first connecting feature of the cover body 1. The first connecting feature and the second connecting feature are combined to a locked state. The bidirectional limiting mechanism is stopped at a locking limiting point 3d. The first connecting feature and the second connecting feature are separated from each other, and the bidirectional limiting mechanism is stopped at a disassembly limiting point 3e.

[0058] The second connecting feature is spaced apart from the bidirectional limiting mechanism by a positioning distance 6c, the second connecting feature is a clamping hook 8 with a clamping surface 8a, one end of the clamping surface 8a is a locking point 8b, and the other end of the clamping surface 8a is a separation point 8c; the bidirectional limiting mechanism comprises a limiting block 9, one side of the limiting block 9 is provided with a locking stop surface 9a, and the other side of the limiting block 9 is provided with a disassembly stop surface 9b; as shown in Figures 5 to 7 The positioning distance 6c is arranged between the separation point 8c and the locking stop surface 9a.

[0059] The adapter 6 is provided with two groups of clamping hooks 8 and two groups of limiting blocks 9, each group of clamping hooks 8 has two center-symmetrical clamping hooks 8, each group of limiting blocks 9 has two center-symmetrical limiting blocks 9, the two clamping hooks 8 and the two limiting blocks 9 are alternately arranged around the inlet 6a of the adapter 6, the locking point 8b of the clamping surface 8a is opposite to the disassembly stop surface 9b of the adjacent limiting block 9, and the separation point 8c of the clamping surface 8a is opposite to the locking stop surface 9a of the adjacent limiting block 9. Thus, when the adapter 6 is locked and matched with the cover body 1, the clamping surface 8a of the clamping hook 8 is gradually rotated into the locking area 2a of the liquid outlet 2 of the cover body 1, the clamping surface 8a is gradually wedge-shapedly combined with the wedge surface 3a, and then the locking point 8b is synchronously rotated clockwise to the stop position with the locking stop surface 9a; when the adapter 6 is disengaged from the cover body 1, the clamping surface 8a of the clamping hook 8 is gradually rotated out of the locking area 2a of the liquid outlet 2 of the cover body 1, and after the clamping surface 8a is completely separated from the wedge surface 3a, the disassembly stop surface 9b is rotated counterclockwise to the stop position.

[0060] The assembly method of the cup cover assembly device is as follows:

[0061] As shown in Figure 8 1, the adapter 6 and the liquid outlet 2 of the cover body 1 are kept on the same axis, and the angles of the two are aligned, that is, the two notches 7b and the two clamping jaws 4 are one-to-one corresponding, each group of clamping hooks 8 and limiting blocks 9 corresponds to a limiting area 2b, the liquid outlet 2 of the cover body 1 is butted against the inlet 6a of the adapter 6, and the clamping jaw 4 passes through the notch 7b to reach above the platform 7.

[0062] As shown in Figure 9 2, the adapter 6 is rotated clockwise, the clamping hook 8 is gradually introduced into the wedge section 3, the clamping surface 8a and the wedge surface 3a are gradually transitioned from the gap cooperation area to the locking cooperation area, when the wedge is locked in place, the locking end 3b of the wedge section 3 forms a wedge locking stress, the locking stop surface 9a of the limiting block 9 just contacts the locking limiting point 3d (separation end 3c) of the wedge section 3, and the separation end 3c of the wedge section 3 forms a positioning stress, preventing the adapter 6 from continuing to rotate clockwise and preventing tripping.

[0063] The limiting surface two 4c of the synchronous clamping jaw 4 enters the limiting surface one 7a of the platform 7 to form a stop cooperation.

[0064] As shown in Figure 10 and11 As shown, 3, counterclockwise rotation of the adapter 6, the hook 8 gradually lead out of the wedge-shaped section 3, so that the clamping surface 8a and wedge surface 3a from the locking fit zone gradually transition to clearance fit zone, when the hook 8 completely separated from the wedge-shaped section 3, the split stop surface 9b of the limiting block 9 just contact the split limiting point 3e (locking end 3b) of the wedge-shaped section 3, stop adapter 6 continue to rotate counterclockwise.

[0065] Synchronous card claw 4 limit surface two 4c off the limit surface one 7a of the platform 7, the card claw 4 reset to the notch 7b.

[0066] 4, the adapter 6 and the cover 1 pull out.

[0067] In further optimized embodiments, as shown, Figure 12 A cup connection system, comprising the cup cover assembly device described above, the liquid inlet periphery of the cover 1 is provided with a connection ring 5, the connection ring 5 is used to connect the cup assembly; the outer wall of the adapter 6 is provided with an assembly structure, the assembly structure is used to connect the spray gun 13;

[0068] Pour paint into the cup assembly, through the sealing assembly of the cover 1 and the cup assembly, the adapter 6 and the cover 1 form a sealing assembly, and then the adapter 6 is sealingly connected to the liquid inlet of the spray gun 13, realizing the function of supplying paint in the cup assembly to the spray gun 13. The assembly structure on the adapter 6 is similar to the threaded section 10 and other structures, which is a conventional technical feature in the art, so it is not described in detail here.

[0069] The cup assembly comprises an inner liner, a rigid outer cup 11 and an outer collar 12, the inner liner is contained in the rigid outer cup 11, the connection ring 5 of the cover 1 extends into the opening of the inner liner to form an interference fit, and the outer collar 12 fixes both the inner liner and the cover 1 to the rigid outer cup 11.

[0070] The inner liner is a flexible cup, paint is filled in the cup cavity of the inner liner, and the inner liner can collapse as the paint decreases. The rigid outer cup 11 is used to support the inner liner, after the cover 1 is buckled with the inner liner and the rigid outer cup 11, the outer collar 12 is sleeved and screwed tightly, the periphery of the cover 1 is pressed by the inner edge of the outer collar 12, and the inner thread provided on the inner periphery of the outer collar 12 is engaged with the outer thread on the rigid outer cup 11.

[0071] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the defined range. Although the present application is illustrated and described in detail in the accompanying drawings and the foregoing description, such illustration and description are considered to be illustrative or exemplary rather than limiting. It should be understood that changes and modifications can be made by those skilled in the art within the scope of the following claims. Specifically, the present application encompasses additional embodiments having any combination of features from the above different embodiments. In terms of the use of the expressions "generally" or "substantially", the present patent application should be understood to disclose the same full satisfaction of these characteristics and values, i.e. without the aforementioned characterization as "generally" or "substantially".

[0072] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A cup lid assembly comprising a lid body and an adapter, the lid body having a first connecting feature on a liquid outlet thereof, the adapter having a second connecting feature on an inlet region thereof, the first connecting feature and the second connecting feature being wedge-shapedly engaged to couple the lid body and the adapter, characterised in that, The liquid outlet of the cover body is matched with the inlet of the adapter by a bidirectional limiting mechanism, the first connecting feature is combined with the second connecting feature to a locked state, the bidirectional limiting mechanism is stopped at a locking limiting point, the first connecting feature and the second connecting feature are separated from each other, and the bidirectional limiting mechanism is stopped at a disassembly limiting point.

2. The cup lid assembly of claim 1, wherein, The outer circumference of the liquid outlet of the cover body is divided into a locking area and a limiting area, one end of the locking area is a locking end, the other end of the locking area is a separation end, one end of the limiting area is the locking limiting point, and the other end of the limiting area is the disassembly limiting point; the locking end of the locking area corresponds to the disassembly limiting point of the limiting area, and the separation end of the locking area corresponds to the locking limiting point of the limiting area.

3. The cup lid assembly of claim 2, wherein, The first connecting feature is a wedge-shaped section arranged on the outer circumference of the liquid outlet, the wedge-shaped section is a wedge-shaped surface facing the surface of the cover body, the wedge-shaped surface gradually approaches the cover body to a low-end point to form a locking end, and the wedge-shaped surface gradually moves away from the cover body to a high-end point to form a separation end; the second connecting feature is a hook arranged in the inlet area of the adapter, the hook has a hook body bent towards the central axis of the adapter, a surface of the hook body facing the inlet direction of the adapter is a clamping surface, and the clamping surface is a plane or an inclined surface; the hook is combined with the wedge-shaped surface of the wedge-shaped section through the clamping surface.

4. The cup lid assembly of claim 3, wherein, The bidirectional limiting mechanism comprises a limiting block arranged on the adapter, the limiting block is arranged in the inlet area of the adapter, one side of the limiting block is provided with a locking stop surface, the other side of the limiting block is provided with a disassembly stop surface, the wedge-shaped surface gradually moves away from the cover body to a high-end point to form a locking limiting point, and the wedge-shaped surface gradually approaches the cover body to a low-end point to form a disassembly limiting point; the locking stop surface of the limiting block contacts the locking limiting point to form a locking stop state, and the disassembly stop surface of the limiting block contacts the disassembly limiting point to form a disassembly stop state.

5. The cup lid assembly of claim 1, wherein, The first connecting feature has an assembly stroke greater than the length of the second connecting feature, and the second connecting feature is spaced apart from the bidirectional limiting mechanism by a positioning distance; in the wedge-shaped combined state, part of the body of the first connecting feature protrudes from the second connecting feature and is located in the positioning distance.

6. The cup lid assembly of claim 1, wherein, The inlet of the adapter protrudes a first connecting structure, a second connecting structure is arranged on the outer wall of the cover body, the inlet of the adapter is sleeved with the liquid outlet of the cover body and is rotated, and the first connecting structure and the second connecting structure form axial limiting.

7. The cup lid assembly of claim 6, wherein, The first connecting structure is a platform arranged around the inlet, the top surface of the platform is a limiting surface one, the second connecting feature and the bidirectional limiting mechanism are arranged on the bottom surface of the platform, the second connecting structure is a claw arranged around the liquid outlet, the claw has a support body, the top end of the support body protrudes a claw head towards the liquid outlet, the bottom surface of the claw head facing the cover body is a limiting surface two, the inlet of the adapter is connected with the liquid outlet of the cover body, and the limiting surface two and the limiting surface one form a stop cooperation.

8. The cup lid assembly of claim 7, wherein, The platform is provided with a notch between the second connecting feature and the bidirectional limiting mechanism, and the claw head cooperates with the notch to guide into the limiting surface one of the platform.

9. An adapter having an inlet end and an outlet end, characterized in that The inlet area of the adapter is provided with a second connecting feature and a bidirectional limiting mechanism, the second connecting feature is matched with the first connecting feature of the cover body, the first connecting feature and the second connecting feature are combined to a locked state, the bidirectional limiting mechanism is stopped at a locked limiting point, the first connecting feature and the second connecting feature are separated from each other, and the bidirectional limiting mechanism is stopped at a disassembly limiting point.

10. The adapter of claim 9, wherein, The second connecting feature and the bidirectional limiting mechanism are spaced apart by a positioning interval, the second connecting feature is a clamping hook with a clamping surface, one end of the clamping surface is a locking point, and the other end of the clamping surface is a separation point; the bidirectional limiting mechanism comprises a limiting block, one side of the limiting block is provided with a locking stop surface, and the other side of the limiting block is provided with a disassembly stop surface; and the positioning interval is arranged between the separation point and the locking stop surface.

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