Cup cover assembling device and adapter

Abstract

The invention provides a cup cover assembling device and an adapter, the cup cover assembling device comprises a cover body and the adapter, a liquid outlet of the cover body is provided with a first connecting feature, an inlet area of the adapter is provided with a second connecting feature, and the first connecting feature and the second connecting feature are in wedge-shaped combination, so that the cover body is connected with the adapter; 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 invention belongs to the technical field of spraying equipment, and relates to a connection structure between a spray cup and a spray gun, in particular to a cup cover assembly device and an adapter. Background Art

[0002] At present, the spray gun mainly uses pneumatic method to atomize the paint for spraying, so it is necessary to supply paint to the spray gun. The more common method is to connect a paint supply cup to the spray gun. This method can ensure that the supply cup and the spray gun move at the same time, and the paint is continuously pressed into the spray gun by gravity, and sprayed out after being atomized by compressed gas. The liquid outlet of the paint supply cup is connected to the spray gun through the connecting nut (or adapter). It can be seen that ensuring the good cooperation between the paint supply cup and the connecting nut (or adapter) is an important prerequisite for ensuring the effective supply of paint; in addition, the convenient disassembly and assembly of the paint supply cup and the connecting nut (or adapter) is also one of the considerations of the qualified standard.

[0003] For example, Chinese patent document AU2017207357B2 discloses a wide-mouth fluid connector for a handheld spray gun, a spray gun reservoir connector system. The system includes a reservoir cap, a spray gun inlet, and complementary first and second connector forms. The first and second connector forms are equipped with one of the cap or the spray gun inlet. The first format includes a plurality of retention structures, each of which defines a capture area. The retention structures are arranged together in a circular pattern. The second format includes a plurality of locking structures, each of which includes a gasket body configured to selectively engage with the capture area. The connector form is configured to provide a wedge engagement between the locking structure and the corresponding retaining structure when the spray gun inlet is rotated relative to the cap. The cap may include a nozzle. The retaining and locking structures are radially spaced apart on the outside of the nozzle, and the nozzle may have an inner diameter of not less than 22 mm.

[0004] In the above technical solution, the reservoir cover and the adapter are matched by complementary first and second connector forms, and the first and second connector forms are specifically formed into a locking assembly by wedge-shaped engagement. Fig.10 and 11 In combination with the locking structure disclosed in the specification as a connector form, the locking structure has a wedge-shaped locking surface, and the extension height of the end 336 of the locking structure toward the second end 338 indicates that the second end 338 is at a low position in the wedge angle to form a locking position, and the end 336 is at a high position in the wedge angle to form a disengagement position. A stop body 334 is provided at the second end 338 (locking position). When the first and second connector forms are wedge-locked, the stop body 334 at the locking position is used to limit the position and stop the screwing action in the locking direction.

[0005] As attached Fig.10Obviously, the wedge body 362 of the support body 360 can correspond to the gasket body 332 entering the locking structure. When one end of the wedge body 362 is screwed to the locking position, the end of the wedge 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 reservoir cover is made of plastic integral injection molding, the second end 338 of the locking structure is subjected to both wedge extrusion and limited top pressure. After a long period of repeated cooperation, the locking and positioning stresses can easily cause fatigue damage to the second end 338, causing problems such as wear and deformation, and then misalignment of the cooperation occurs, and the tightness and firmness of the connection are reduced. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems in the prior art and to provide a cup cover assembly device and an adapter.

[0007] The objective of the present invention can be achieved through the following technical solutions: A cup cover assembly device, comprising a cover body and an adapter, a first connection feature is arranged on the liquid outlet of the cover body, a second connection feature is arranged on the inlet area of ​​the adapter, the first connection feature and the second connection feature are wedge-shaped combined to connect the cover body and the adapter, the liquid outlet of the cover body and the inlet of the adapter are matched with a two-way limiting mechanism, the first connection feature and the second connection feature are combined into a locking state, the two-way limiting mechanism stops at a locking limit point, the first connection feature and the second connection feature are separated from each other, and the two-way limiting mechanism stops at a split limit point.

[0008] In the above-mentioned cup lid assembly 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 the locking end, and the other end of the locking area is the separation end, one end of the limiting area is the locking limit point, and the other end of the limiting area is the splitting limit point; the locking end of the locking area corresponds to the splitting limit point of the limiting area, and the separation end of the locking area corresponds to the locking limit point of the limiting area.

[0009] In the above-mentioned cup lid assembly device, the first connection feature is a wedge-shaped segment arranged on the outer periphery of the liquid outlet, and the surface of the wedge-shaped segment facing the cover body is a wedge-shaped surface, and 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 connection feature is a hook arranged in the inlet area of ​​the adapter, and the hook has a hook body bent toward the central axis of the adapter, and the surface of the hook body facing the inlet direction of the adapter is a snap-fit ​​surface, and the snap-fit ​​surface is specifically a plane or an inclined surface, and the hook is combined with the wedge-shaped surface of the wedge-shaped segment through the snap-fit ​​surface.

[0010] In the above-mentioned cup lid assembly device, the bidirectional limit mechanism includes a limit block set on the adapter, the limit block is arranged in the inlet area of ​​the adapter, a locking stop surface is set on one side of the limit block, and a split stop surface is set on the other side of the limit block, the wedge-shaped surface gradually moves away from the cover body to the high end point to form a locking limit point, and the wedge-shaped surface gradually approaches the cover body to the low end point to form a split limit point, the locking stop surface of the limit block contacts the locking limit point to form a locking stop state, and the split stop surface of the limit block contacts the split limit point to form a split stop state.

[0011] In the above-mentioned cup cover assembly device, the first connection feature has an assembly stroke longer than the length of the second connection feature, the second connection feature is spaced apart from the two-way limiting mechanism by a positioning spacing, and in the wedge-shaped engagement state, part of the body of the first connection feature extends out of the second connection feature and is located in the positioning spacing.

[0012] In the above-mentioned cup cover assembly device, a first connecting structure protrudes from the outer periphery of the inlet of the adapter, a second connecting structure is arranged on the outer wall of the cover body, the inlet of the adapter is sleeved on the liquid outlet of the cover body and rotates, and the first connecting structure and the second connecting structure form an axial limit.

[0013] In the above-mentioned cup lid assembly device, the first connecting structure is a platform arranged around the inlet, the top surface of the platform is limiting surface one, the second connecting feature and the two-way 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 supporting body, the top end of the supporting body protrudes a claw head toward the liquid outlet, the bottom surface of the claw head facing the cover body is limiting surface two, the inlet of the adapter is connected to the liquid outlet of the cover body, and the limiting surface two forms a stop fit with the limiting surface one.

[0014] In the above-mentioned cup cover assembly device, a notch is arranged between the second connection feature and the bidirectional limiting mechanism on the platform, and the claw head cooperates with the notch to be introduced into the limiting surface 1 of the platform.

[0015] An adapter, one end of the adapter is an inlet, and the other end is an outlet, the inlet area of ​​the adapter is provided with a second connection feature and a two-way limit mechanism, the second connection feature cooperates with the first connection feature of the cover body, the first connection feature and the second connection feature are combined into a locking state, the two-way limit mechanism stops at a locking limit point, the first connection feature and the second connection feature are separated from each other, and the two-way limit mechanism stops at a split limit point.

[0016] In the above-mentioned adapter, the second connection feature is separated from the two-way limiting mechanism by a positioning distance, and the second connection feature is a 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 two-way limiting mechanism includes a limit block, one side of the limit block is provided with a locking stop surface, and the other side of the limit block is provided with a splitting 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 adapter have the following beneficial effects:

[0018] 1. This connection system adopts wedge-shaped locking cooperation. Specifically, by adding a two-way limit mechanism, the wedge-shaped locking point and the limit stop point are separated, thereby differentiating the force-bearing area, eliminating stress concentration, and avoiding fatigue damage to the connection features. It not only ensures that the cover and the adapter are assembled in place, but also maintains the accuracy, tightness and firmness of the installation, effectively extending the service life of the cover, ensuring continuous and stable paint supply, and maintaining a good painting operation.

[0019] 2. The two-way limiter is used to quickly achieve locking and positioning, avoid excessive force causing over-fitting and dislocation and disengagement, and improve assembly safety; it can also accurately reach the separation position to achieve rapid separation of the cover and the adapter. This allows for convenient and precise installation and rapid separation to optimize disassembly and assembly operations, improve disassembly and assembly efficiency, and enhance the operating experience. The clear rotation direction and locking and disassembly instructions enable users to quickly understand the assembly and disassembly steps during use, reducing operational complexity and suitable for a wide range of user groups.

[0020] 3. The wedge-shaped segment has two end points, and the adapter's limit block is used to separately determine the locking limit point and the split limit point, forming a two-way limit design. The traditional structure of the cover does not need to be improved, which makes it easier to open the mold for injection molding, reducing production costs and difficulty; and the same adapter can be used with various types of covers, expanding the scope of use and increasing the flexibility of application.

[0021] 4. Through the corresponding cooperation between the hook and the wedge-shaped segment, the corresponding cooperation between the claw and the platform, multiple cooperation points are distributed around the circumference of the liquid outlet of the cover body, so as to achieve the locking effect of the cover body and the adapter in multiple different directions. When an external force is applied in a certain direction, the coaxiality of the assembly can be maintained, which enhances the stability and firmness of the connection and avoids loosening or falling off due to external force.

[0022] 5. The notches and claws in the design allow the fingers to apply force better during the screwing process to avoid slipping; the design takes the user's operating habits into consideration, and through reasonable notches and finger force positions, the operation is more natural and smooth, improving the user's comfort during operation.

[0023] 6. Through reasonable spacing design and structural layout, material waste is reduced, and lightweight design is achieved while ensuring strength. This structure not only improves production efficiency, but also helps to reduce production costs. The structural design of the device can be applied to various types of cup lids and adapters for docking, with strong versatility and flexibility, and can meet different market needs.

[0024] In summary, the cup lid assembly device has significant advantages in accuracy, reliability, convenience, functionality, safety, user experience, etc., and has good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an exploded three-dimensional structural diagram of the first embodiment of the cup cover assembly device.

[0026] Figure 2 This is a three-dimensional structural diagram of the locking position of the first embodiment of the cup cover assembly device.

[0027] Figure 3 The three-dimensional assembly structure of the disassembly position of the first embodiment of the cup cover assembly device Figure 1 .

[0028] Figure 4 The three-dimensional assembly structure of the disassembly position of the first embodiment of the cup cover assembly device Figure 2 .

[0029] Figure 5 It is a three-dimensional structural diagram of the adapter in the cup cover assembly device.

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

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

[0032] Figure 8 This is an exploded three-dimensional structural diagram of the second embodiment of the cup cover assembly device.

[0033] Fig. 9 This is a three-dimensional structural diagram of the locking position of the second embodiment of the cup cover assembly device.

[0034] Fig.10 The assembly three-dimensional structure of the disassembly position of the second embodiment of the cup cover assembly device Figure 1 .

[0035] Fig.11 The assembly three-dimensional structure of the disassembly position of the second embodiment of the cup cover assembly device Figure 2 .

[0036] Fig.12 This is a three-dimensional structural diagram of the assembly of the supply cup connection system.

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

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0039] like Figures 1 to 11 As shown, the cup cover assembly device includes a cover body 1 and an adapter 6, a first connection feature is arranged on the liquid outlet 2 of the cover body 1, a second connection feature is arranged in the inlet 6a area of ​​the adapter 6, the first connection feature and the second connection 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 two-way limiting mechanism, the first connection feature and the second connection feature are combined into a locking state, the two-way limiting mechanism stops at the locking limit point 3d, the first connection feature and the second connection feature are separated from each other, and the two-way limiting mechanism stops at the splitting limit point 3e.

[0040] Through the screw-in action, the first connection feature and the second connection feature gradually transition from the clearance fit area to the locking fit area, and the screw-in stop is performed by the two-way limit mechanism to prevent the misalignment and disengagement caused by excessive screw-in force, which effectively protects the connection features. Through the screw-out action, the first connection feature and the second connection feature gradually transition from the locking fit area to the clearance fit area, and finally the two are completely separated, and the screw-out stop is performed by the two-way limit mechanism, thereby achieving precise positioning, so that two opposite forces can be directly applied to quickly separate the two, thereby improving the splitting efficiency.

[0041] like Figure 1 and 8As shown, preferably, the outer circumference of the liquid outlet 2 of the cover body 1 is divided into a locking area 2a and a limiting area 2b, one end of the locking area 2a is a locking end 3b, the other end of the locking area 2a is a separation end 3c, one end of the limiting area 2b is a locking limit point 3d, and the other end of the limiting area 2b is a splitting limit point 3e; the locking end 3b of the locking area 2a corresponds to the splitting limit point 3e of the limiting area 2b, and the separation end 3c of the locking area 2a corresponds to the locking limit point 3d of the limiting area 2b.

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

[0043] The locking area 2a and the limiting area 2b are arranged alternately, that is, one limiting area 2b is spaced between two locking areas 2a, and one locking area 2a is spaced between two limiting areas 2b. When the first connection feature and the second connection feature are screwed in or out, the first connection feature rotates relative to each other, and the two-way limiting mechanism rotates synchronously, so that when the first connection feature and the second connection feature are locked in place, the two-way limiting mechanism cooperates with the locking limit point 3d at the same time; when the first connection feature and the second connection feature are separated in place, the two-way limiting mechanism cooperates with the separation limit point 3e at the same time.

[0044] like Figure 1 and 8 As shown, preferably, the first connection feature is a wedge-shaped segment 3 arranged on the outer periphery of the liquid outlet 2, the surface of the wedge-shaped segment 3 facing the cover body 1 is a wedge-shaped surface 3a, the wedge-shaped surface 3a gradually approaches the cover body 1 to a low end point to form a locking end 3b, and the wedge-shaped surface 3a gradually moves away from the cover body 1 to a high end point to form a separation end 3c; the liquid outlet 2 is a circular tube interface, and two arc-shaped convex strips are centrally symmetrically distributed on the outer peripheral wall of the circular tube interface to form a wedge-shaped segment 3, the lower surface of the wedge-shaped segment 3 is inclined at a certain angle to form a wedge-shaped surface 3a, the area between the wedge surface 3a and the cover body 1 is a locking area 2a, and the outer wall of the liquid outlet 2 between two adjacent wedge-shaped segments 3 forms a limiting area 2b.

[0045] like Figures 5 to 7 As shown, the second connection feature is a hook 8 provided at the inlet region of the adapter 6, and the hook 8 is engaged with the wedge surface 3a of the wedge segment 3 via a clamping surface 8a. A platform 7 is provided on the inlet 6a of the adapter 6, and two hooks 8 protrude from the bottom surface of the platform 7, and the two hooks 8 are arranged symmetrically with respect to the center.

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

[0047] like Figures 1 to 7 As shown, preferably, the bidirectional limit mechanism includes a limit block 9 provided on the adapter 6, the limit block 9 is arranged in the inlet area of ​​the adapter 6, a locking stop surface 9a is provided on one side of the limit block 9, and a splitting stop surface 9b is provided on the other side of the limit block 9, the wedge surface 3a gradually moves away from the cover body 1 to the high end point to form a locking limit point 3d, and the wedge surface 3a gradually approaches the cover body 1 to the low end point to form a splitting limit point 3e, the locking stop surface 9a of the limit block 9 contacts the locking limit point 3d to form a locking stop state, and the splitting stop surface 9b of the limit block 9 contacts the splitting limit point 3e to form a splitting stop state.

[0048] like Figure 2 and 9 As shown, the first connection feature has an assembly stroke longer than the second connection feature, the second connection feature is separated from the two-way limit mechanism by a positioning spacing 6c, and in the wedge-shaped engagement state, part of the body of the first connection feature extends out of the second connection feature and is located in the positioning spacing 6c.

[0049] The second connection feature is separated from the bidirectional limit mechanism so that the bidirectional limit mechanism can provide limit features in two different directions. The length of the first connection feature is the length of the assembly stroke, and the total length of the second connection feature connecting the positioning interval is equal to the length of the assembly stroke, so when the first connection feature reaches the locking end, the bidirectional limit mechanism just reaches the locking limit point.

[0050] like Figures 5 to 7 As shown, a platform 7 is provided on the inlet 6a of the adapter 6, and two limit blocks 9 protrude from the bottom surface of the platform 7. The two limit blocks 9 are arranged symmetrically with respect to the center. One hook 8 and one limit block 9 cooperate to form a set, and the hooks 8 and limit blocks 9 are arranged alternately. Figures 1 to 4As shown, a reasonable spacing is set between the hook 8 and the limit block 9 of each group. When the cover body 1 and the adapter 6 are docked and rotated clockwise, the hook 8 rotates along the locking area 2a, and the limit block 9 is synchronously rotated in the limit area 2b until the locking stop surface 9a of the limit block 9 contacts the locking limit point 3d of the wedge segment 3, stopping the adapter 6 from continuing to rotate clockwise, and the engaging surface 8a of the hook 8 and the wedge surface 3a of the wedge segment 3 are just locked in place. The docked cover body 1 and the adapter 6 are rotated counterclockwise, and the hook 8 rotates in the opposite direction along the locking area 2a, and the limit block 9 is synchronously rotated in the limit area 2b, until the split stop surface 9b of the limit block 9 contacts the split limit point 3e of the wedge segment 3, stopping the adapter 6 from continuing to rotate counterclockwise, and the engaging surface 8a of the hook 8 and the wedge surface 3a of the wedge segment 3 are completely separated, and the adapter 6 is pulled off the cover body 1.

[0051] like Figures 8 to 11 As shown, in a further optimized implementation scheme, a first connecting structure protrudes from the outer periphery of the inlet 6a of the adapter 6, and a second connecting structure is arranged on the outer wall of the cover body 1. The inlet 6a of the adapter 6 is sleeved on the liquid outlet 2 of the cover body 1 and rotated, 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, and the second connecting feature and a two-way limiting mechanism are arranged on the bottom surface of the platform 7. The second connecting structure is a claw 4 arranged around the liquid outlet 2, the claw 4 has a supporting body 4a, and the top of the supporting body 4a protrudes a claw head 4b toward the liquid outlet 2, and the bottom surface of the claw head 4b facing the cover body 1 is a limiting surface 2 4c, the inlet 6a of the adapter 6 is connected to the liquid outlet 2 of the cover body 1, and the limiting surface 2 4c forms a stop fit with the limiting surface 1 7a.

[0053] The platform 7 protruding from the outer periphery of the inlet 6a of the adapter 6 is similar to a flange structure, and is roughly an annular sheet. The platform 7 provides space for arranging the hook 8 and the limit block 9, and at the same time provides a stop surface for the claw 4. There are two claws 4, which are symmetrically arranged on both sides of the liquid outlet 2. The limit surface 4c of the claw 4 can be a plane or an inclined surface; when the limit surface 4c is a plane, when the adapter 6 and the cover body 1 rotate relative to each other, a clearance fit is formed between the plane limit surface 4c and the limit surface 1 7a; when the limit surface 4c is an inclined surface, after the relative rotation of the adapter 6 and the cover body 1, the inclined limit surface 4c and the limit surface 1 7a are gradually pressed to form an interference fit.

[0054] like Figures 5 to 11As shown, preferably, a notch 7b is provided between the second connection feature and the bidirectional limiting mechanism on the platform 7, and the claw head 4b cooperates with the notch 7b to be introduced into the limiting surface 1 7a of the platform 7. Two groups of hooks 8 and limiting blocks 9 are centrally symmetrically provided on the bottom surface of the platform 7, and the portion of the platform 7 between each group of hooks 8 and limiting blocks 9 forms a notch 7b, and each notch 7b corresponds to a claw 4. The notch 7b achieves two functions: first, the depth of the notch 7b corresponds to the elongated portion of the claw head 4b, and the notch 7b is aligned with the claw 4 one by one during docking, and the notch 7b provides a clearance space for the claw 4, so that the claw 4 passes through the notch 7b to reach the top of the platform 7, and then through rotation, the claw 4 is misaligned with the notch 7b, and the limiting surface 2 4c of the claw 4 enters the limiting surface 1 7a of the platform 7 to form a stop fit. Second, the recess 7b forms a concave structure on the circumferential contour of the platform 7. When manually screwing the adapter 6 and the cover body 1, fingers can be embedded in the recess 7b to apply screwing force, thereby avoiding slipping, reducing locking force, and ensuring the locking effect.

[0055] like Figure 8 As shown, preferably, with the axis of the liquid outlet 2 as the center, there is an angle between the central arrangement point of the claw 4 and the central arrangement point of the first connection feature. Around the axis of the liquid outlet 2, the two wedge segments 3 are 180° apart, the two claws 4 are 180° apart, and the adjacent wedge segments 3 and claws 4 are 90° apart. The two wedge segments 3 and the two 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 axial locking action points at different points are formed. Even if the adapter 6 is bent in an inclined direction, the coaxiality of the adapter 6 and the liquid outlet 2 can be ensured, thereby improving the stability and firmness of the connection between the adapter 6 and the cover body 1.

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

[0057] A second connection feature and a two-way limiting mechanism are provided in the inlet 6a area of ​​the adapter 6, the second connection feature cooperates with the first connection feature of the cover body 1, the first connection feature and the second connection feature are combined into a locking state, the two-way limiting mechanism stops at the locking limit point 3d, the first connection feature and the second connection feature are separated from each other, and the two-way limiting mechanism stops at the splitting limit point 3e.

[0058] The second connection feature is separated from the bidirectional limiting mechanism by a positioning spacing 6c. The second connection feature is a hook 8 having a clamping surface 8a. One end of the clamping surface 8a is a locking point 8b, and the other end of the clamping surface is a separation point 8c. The bidirectional limiting mechanism includes 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 splitting stop surface 9b. Figures 5 to 7 As shown, the positioning distance 6c is arranged between the separation point 8c and the locking stop surface 9a.

[0059] There are two groups of hooks 8 and two groups of limit blocks 9 on the adapter 6, each group of hooks 8 has two centrally symmetrical hooks 8, and each group of limit blocks 9 has two centrally symmetrical limit blocks 9. The two hooks 8 and the two limit blocks 9 are alternately arranged around the inlet 6a of the adapter 6, so that the locking point 8b of the clamping surface 8a is opposite to the splitting stop surface 9b of the adjacent limit block 9, and the separation point 8c of the clamping surface 8a is opposite to the locking stop surface 9a of the adjacent limit block 9. Therefore, when the adapter 6 and the cover body 1 are locked together, the engaging surface 8a of the hook 8 is gradually rotated into the locking area 2a of the liquid outlet 2 of the cover body 1, so that the engaging surface 8a and the wedge surface 3a are gradually wedge-shaped, and then the locking point 8b and the locking stop surface 9a are synchronously rotated clockwise to the stop position; when the adapter 6 and the cover body 1 are loosened, the engaging surface 8a of the hook 8 is gradually rotated out of the locking area 2a of the liquid outlet 2 of the cover body 1, and after the engaging surface 8a is completely separated from the wedge surface 3a, until the split stop surface 9b is rotated counterclockwise to the stop position.

[0060] Assembly method of the cup cover assembly device:

[0061] like Figure 8 As shown, 1. Keep the adapter 6 and the liquid outlet 2 of the cover body 1 on the same axis and align the two angles, that is, the two recesses 7b correspond to the two claws 4 one by one, each set of hooks 8 and limit blocks 9 corresponds to a limit area 2b, and connect the liquid outlet 2 of the cover body 1 with the inlet 6a of the adapter 6, and the claws 4 pass through the recesses 7b to reach the top of the platform 7.

[0062] like Fig. 9 As shown, 2. Rotate the adapter 6 clockwise, and the hook 8 is gradually introduced into the wedge segment 3, so that the engaging surface 8a and the wedge surface 3a gradually transition from the clearance fit area to the locking fit area. When the wedge is locked in place, the locking end 3b of the wedge segment 3 forms a wedge locking stress, and the locking stop surface 9a of the limit block 9 just contacts the locking limit point 3d (separation end 3c) of the wedge segment 3. The separation end 3c of the wedge segment 3 forms a positioning stress, which stops the adapter 6 from continuing to rotate clockwise and prevents it from disengaging.

[0063] The second limiting surface 4c of the synchronous claw 4 enters the first limiting surface 7a of the platform 7 to form a stop fit.

[0064] like Fig.10 and11 As shown, 3. rotate the adapter 6 counterclockwise, the hook 8 gradually leads out of the wedge segment 3, so that the engaging surface 8a and the wedge surface 3a gradually transition from the locking fit area to the clearance fit area. When the hook 8 is completely separated from the wedge segment 3, the splitting stop surface 9b of the limit block 9 just contacts the splitting limit point 3e (locking end 3b) of the wedge segment 3, preventing the adapter 6 from continuing to rotate counterclockwise.

[0065] The second limiting surface 4c of the synchronous clamping claw 4 is separated from the first limiting surface 7a of the platform 7, and the clamping claw 4 is reset to the notch 7b.

[0066] 4. Pull the adapter 6 and cover 1 apart.

[0067] In a further optimized embodiment, Fig.12 As shown, a supply cup connection system includes the above-mentioned cup cover assembly device, a connection ring 5 is arranged around the liquid inlet of the cover body 1, and the connection ring 5 is used to connect the cup assembly; an assembly structure is arranged on the outer wall of the adapter 6, and the assembly structure is used to connect the spray gun 13;

[0068] Paint is poured into the cup assembly, and the cover body 1 is sealed and assembled with the cup assembly, and the adapter 6 is sealed and assembled with the cover body 1, and then the liquid supply port of the spray gun 13 is sealed and connected through the adapter 6, so that the paint in the cup assembly is supplied to the spray gun 13. The assembly structure on the adapter 6 is similar to the structure of the threaded section 10, which is a conventional technical feature in the art, so it will not be described in detail here.

[0069] The cup assembly includes an inner liner, a rigid outer cup 11 and an outer clamping ring 12. The inner liner is accommodated in the rigid outer cup 11. The connecting ring 5 of the cover body 1 extends into the opening of the inner liner to form an interference fit. The outer clamping ring 12 fixes both the inner liner and the cover body 1 to the rigid outer cup 11.

[0070] The inner liner is a flexible cup body, and the cup cavity of the inner liner is filled with paint, 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 body 1 is buckled with the inner liner and the rigid outer cup 11, the outer clamping ring 12 is sleeved and screwed and locked. The inner edge of the outer clamping ring 12 is used to press the edge of the circumference of the cover body 1, and the inner thread set on the inner circumference of the outer clamping ring 12 is engaged with the outer thread on the rigid outer cup 11.

[0071] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the present invention or exceed the defined scope. Although the present invention is described and described in detail in the drawings and the foregoing description, such descriptions and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the present invention encompasses additional embodiments having any combination of features from the above-mentioned different embodiments. With respect to the use of the expression "generally" or "substantially", this patent application should be understood to disclose that these features and values ​​are also fully satisfied, i.e., there is no aforementioned characterization as "generally" or "substantially".

[0072] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A cup cover assembly device, comprising a cover body and an adapter, wherein a first connection feature is arranged on the liquid outlet of the cover body, and a second connection feature is arranged on the inlet area of ​​the adapter, wherein the first connection feature and the second connection feature are wedge-shapedly combined to connect the cover body and the adapter, wherein: The liquid outlet of the cover body and the inlet of the adapter are matched with a two-way limiting mechanism, the first connection feature and the second connection feature are combined into a locking state, the two-way limiting mechanism stops at the locking limit point, the first connection feature and the second connection feature are separated from each other, and the two-way limiting mechanism stops at the splitting limit point.

2. The cup cover assembly device according to claim 1, characterized in that: 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 the locking end, and the other end of the locking area is the separation end, one end of the limiting area is the locking limit point, and the other end of the limiting area is the splitting limit point; the locking end of the locking area corresponds to the splitting limit point of the limiting area, and the separation end of the locking area corresponds to the locking limit point of the limiting area.

3. The cup cover assembly device according to claim 2, characterized in that: The first connection feature is a wedge-shaped segment arranged on the periphery of the liquid outlet, and the surface of the wedge-shaped segment facing the cover body is a wedge-shaped surface, and 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 connection feature is a hook arranged in the inlet area of ​​the adapter, and the hook has a hook body bent toward the central axis of the adapter, and the surface of the hook body facing the inlet direction of the adapter is a snap-fit ​​surface, and the snap-fit ​​surface is specifically a plane or an inclined surface, and the hook is combined with the wedge-shaped surface of the wedge-shaped segment through the snap-fit ​​surface.

4. The cup cover assembly device according to claim 3, characterized in that: The bidirectional limit mechanism includes a limit block provided on the adapter, the limit block is arranged in the inlet area of ​​the adapter, a locking stop surface is provided on one side of the limit block, and a splitting stop surface is provided on the other side of the limit block, the wedge-shaped surface gradually moves away from the cover body to a high end point to form a locking limit point, and the wedge-shaped surface gradually approaches the cover body to a low end point to form a splitting limit point, the locking stop surface of the limit block contacts the locking limit point to form a locking stop state, and the splitting stop surface of the limit block contacts the splitting limit point to form a splitting stop state.

5. The cup cover assembly device according to claim 1, characterized in that: The first connection feature has an assembly stroke longer than the second connection feature, the second connection feature is spaced apart from the bidirectional limiting mechanism by a positioning spacing, and in a wedge-shaped engagement state, part of the body of the first connection feature extends out of the second connection feature and is located in the positioning spacing.

6. The cup cover assembly device according to claim 1, characterized in that: A first connection structure protrudes from the outer periphery of the inlet of the adapter, a second connection structure is arranged on the outer wall of the cover body, the inlet of the adapter is sleeved on the liquid outlet of the cover body and rotates, and the first connection structure and the second connection structure form an axial limit.

7. The cup cover assembly device according to claim 6, characterized in that: The first connection structure is a platform arranged around the inlet, the top surface of the platform is limit surface one, the second connection feature and the bidirectional limit mechanism are arranged on the bottom surface of the platform, the second connection 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 toward the liquid outlet, the bottom surface of the claw head facing the cover body is limit surface two, the inlet of the adapter is connected to the liquid outlet of the cover body, and the limit surface two forms a stop fit with the limit surface one.

8. The cup cover assembly device according to claim 7, characterized in that: The platform is provided with a notch between the second connection feature and the bidirectional limiting mechanism, and the claw head cooperates with the notch to be introduced into the limiting surface 1 of the platform.

9. An adapter, one end of which is an inlet and the other end of which is an outlet, characterized in that: The import area of ​​the adapter is provided with a second connection feature and a bidirectional limiting mechanism, the second connection feature cooperates with the first connection feature of the cover body, the first connection feature and the second connection feature are combined into a locking state, the bidirectional limiting mechanism stops at the locking limit point, the first connection feature and the second connection feature are separated from each other, and the bidirectional limiting mechanism stops at the splitting limit point.

10. The adapter according to claim 9, characterized in that The second connection feature is separated from the two-way limiting mechanism by a positioning distance, and the second connection feature is a hook with a locking surface, one end of the locking surface is a locking point, and the other end of the locking surface is a separation point; the two-way limiting mechanism includes a limit block, one side of the limit block is provided with a locking stop surface, and the other side of the limit block is provided with a splitting stop surface; the positioning distance is arranged between the separation point and the locking stop surface.

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