Separate double-material mixing dropper bottle and assembly method

Abstract

The present invention discloses a separable double-material mixing dropper bottle, which is composed of a first finished product and a second finished product, wherein the first finished product is composed of a bottle cap and a bottle body; the bottle cap includes: a piston structure, material body A is sealed in the inner liner of the piston structure, and the outlet of the piston is connected to a one-way valve; a screw cap, the circular step of the inner liner is connected to the screw cap as a whole through a first buckle position; material body B is in the bottle body; the bottle cap is screwed onto the bottle body; the second finished product includes a dropper. The present invention also discloses an assembly method for a separable double-material mixing dropper bottle; the present invention provides two finished products for customers to mix and assemble, with a rigorous structure and simple operation; the material bodies A and B in the first finished product are stored separately, mixed when used, and then assembled with the second finished product to form a final finished product. The present invention has a good user experience and is easy to assemble, and the separate packaging can well maintain the activity of the product.

Description

Technical Field

[0001] The invention relates to a cosmetic dropper bottle, in particular to a separate double-material mixing dropper bottle and an assembly method thereof. Background Art

[0002] With the development of society and people's pursuit of a better life, the types of cosmetics are becoming more and more abundant. In order to increase user participation and experience, the cosmetics industry has invested a lot of R&D expenses to develop a variety of aesthetic cosmetic packaging, while separating the two liquid materials, and mixing them during use can also maintain the activity of the materials. However, in the current mixed cosmetics, most of them put multiple materials with different ingredients in different bottles, and then the users mix them manually. Although this achieves the purpose of improving customer participation, the user experience is not good: because there are too many bottles and the operation is complicated, or the bottles may be accidentally spilled, making the entire cosmetics unusable, causing losses. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a separate double-material mixing dropper bottle and an assembly method. The cosmetic dropper bottle is composed of two separate finished products, which solves the problem of maintaining the activity of the finished products and the complicated operation due to too many bottles.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] A separate double-material mixing dropper bottle is composed of a first finished product and a second finished product;

[0006] Among them, the first finished product consists of a bottle cap and a bottle body;

[0007] The bottle cap comprises:

[0008] A piston structure, the material body A is sealed in the inner tank of the piston structure, and the outlet of the piston is connected to a one-way valve;

[0009] A screw cap, wherein the circular step of the inner container is connected to the screw cap as a whole through a first buckle point;

[0010] Material B is in the bottle;

[0011] The bottle cap is screwed onto the bottle body;

[0012] The second finished product includes a dropper.

[0013] Preferably, the piston structure comprises: a push rod, a push rod plug, a push rod lock, an inner liner, a screw cap, a first tightening plate, a second tightening plate, a valve plate pressure cap, a silicone valve plate, and an inner liner screw cap, one end of the push rod is a pressing portion, and the other end is a protruding portion, a fixing member is provided between the pressing portion and the protruding portion; the protruding portion is connected and fixed to the push rod plug, the end end of the inner liner is provided with a circular step, the front end of the inner liner is provided with a threaded opening, the silicone valve plate, the valve plate pressure cap and the second tightening plate are fixed in the inner liner screw cap to form a screw cap body, and the screw cap body is screwed on the threaded opening of the inner liner to form a one-way valve; an exhaust hole is provided on the upper part of the inner liner, which is sealed by the push rod plug, and the push rod lock is clamped on the push rod and locks the push rod so that the push rod plug is limited to the exhaust hole.

[0014] Preferably, the second finished product comprises: an outer cover, a pressure cover, an inner cover, a rubber head, a third tightening piece, an inner plug and a dropper, the top of the outer cover is provided with a first circular hole step, the lower end of the pressure cover is provided with a second circular hole step, the pressure cover is sleeved in the outer cover, the inner diameter of the circular hole of the first circular hole step is smaller than the outer diameter of the second circular hole step, the interior of the outer cover is provided with a third circular hole step, the top of the inner cover is fitted with the third circular hole step, the lower part of the inner cover is fixed to the outer cover through a third buckle point, the dropper is connected to the rubber head, the head of the rubber head is a cylindrical cavity structure, the top of the inner cover is provided with a fourth circular hole step, and the rubber head is connected to the inner cover; the inner side of the inner cover is provided with a thread and a second buckle point, the second buckle point is used to clamp the inner plug, the inner plug is hollow, and a third tightening piece is provided between the top of the inner plug and the annular baffle.

[0015] Preferably, the material of the rubber head is thermoplastic plastic, thermoplastic elastomer or thermosetting elastomer;

[0016] Preferably, the push rod lock is a C-shaped buckle, the C-shaped buckle is movably connected to the push rod, and the C-shaped buckle is provided with a handle.

[0017] Preferably, one end of the push rod is a pressing portion, and the other end is a convex portion, and a fixing portion is between the pressing portion and the convex portion (103), and the convex portion is connected and fixed to the push rod rubber plug (104).

[0018] Preferably, a groove and a circular baffle are provided at the lower end of the rubber head, and the third circular hole step is clamped in the groove.

[0019] Preferably, the push rod, push rod lock, screw cap, valve plate pressure cap and liner screw cap are made of PP; the liner material is PETG; the first tightening piece, the second tightening piece and the third tightening piece are made of PE; and the bottle body is made of glass.

[0020] Preferably, the material of the rubber head is thermoplastic plastic, thermoplastic elastomer or thermosetting elastomer.

[0021] Preferably, the fluidity of the thermoplastic elastomer or thermosetting elastomer is under a load of 2.16 kg and at a temperature of 190° C. or 260° C., the MFI fluidity of the material is >50 g / 10 min, and the associated elastic modulus is <300 MPa.

[0022] Preferably, the push rod is integrally formed.

[0023] Preferably, the rubber head is integrally formed.

[0024] Preferably, the outer cover is integrally formed.

[0025] Preferably, the inner cover is integrally formed.

[0026] The present invention also includes an assembly method of a separate type double-material mixing dropper bottle, and the assembly method of the separate type double-material mixing dropper bottle includes the following steps:

[0027] S1. Prefabrication of the first finished product

[0028] 1.1 First, the push rod and the push rod rubber plug form a piston, the inner liner is connected to the screw cap through the first buckle position, and then the push rod lock is clamped on the push rod to limit the position of the push rod, and the push rod of the piston is pushed into the inner liner to form a piston structure with the inner liner; when the push rod lock is clamped on the push rod, the push rod rubber plug just blocks the exhaust hole provided on the upper part of the inner liner and locks the push rod so that it cannot be pressed;

[0029] A first tightening sheet is provided inside the screw cap;

[0030] The silicone valve sheet, the valve sheet gland and the second tightening sheet are fixed in the inner tank screw cover to form a screw cover body;

[0031] Then, the inner container is filled with material A, and the screw cap is screwed onto the threaded opening of the inner container to form a one-way valve. The material A is sealed in the inner container, and the material A will not move downward without external force.

[0032] 1.2 Finally, tighten the screw cap onto the opening of the bottle filled with material B;

[0033] S2. Prefabricate the second finished product

[0034] 2.1 First, pass the inner cover downward from the top of the rubber head, and the fourth circular hole step on the inner cover is clamped in the groove of the rubber head;

[0035] 2.2 Put the gland on the rubber head, and then put the outer cover on the top of the gland;

[0036] 2.3 Fix the upper protrusion of the dropper into the rubber head;

[0037] 2.4 Insert the third tightening piece and the inner plug into the dropper in sequence, and fix the inner plug to the inner cover via the second buckle point arranged on the inner wall.

[0038] Preferably, the lower part of the inner cover is fixed to the outer cover via a third buckle point, and the first circular hole step fits with the second circular hole step; a gap is left between the top of the inner cover and the second circular hole step of the pressure cover, and the gap is the up and down travel space for the pressure cover to press.

[0039] Beneficial effects: The present invention provides two finished products for customers to mix and assemble, with rigorous structure and easy operation; the materials A and B in the first finished product are mixed, and then assembled with the second finished product to form the final finished product. The product has good user experience, is easy to assemble, and the separate packaging can well maintain the activity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of a separate double-material mixing dropper bottle of the present invention;

[0041] Figure 2 It is an exploded view of a first finished product of the separable double-material mixing dropper bottle of the present invention;

[0042] Figure 3 It is a cross-sectional view of a first finished product of the separable dual-material mixing dropper bottle of the present invention;

[0043] Figure 4 This is a partial enlarged view of the A portion of the first finished product of the split double-material mixing dropper bottle of the present invention;

[0044] Figure 5 It is a partial enlarged view of the B portion of the first finished product of the separable double-material mixing dropper bottle of the present invention;

[0045] Figure 6 This is a diagram showing the push rod lock 3 of the first finished product of the split double-material mixing dropper bottle of the present invention in an open state;

[0046] Figure 7 It is an exploded view of the second finished product of the separable double-material mixing dropper bottle of the present invention;

[0047] Figure 8 It is a structural schematic diagram of a second finished product of the separable double-material mixing dropper bottle of the present invention;

[0048] Fig. 9 This is a schematic diagram of a second finished product of the separate dual-material mixing dropper bottle of the present invention;

[0049] Fig.10 It is a partial enlarged view of the C portion of the second finished product of the split type double-material mixing dropper bottle of the present invention;

[0050] Fig.11The method of using the present invention is shown in FIG. Figure 1 ;

[0051] Fig.12 The method of using the present invention is shown in FIG. Figure 2 ;

[0052] Fig.13 The method of using the present invention is shown in FIG. Figure 3 . DETAILED DESCRIPTION

[0053] The positional relationships used in the present invention, such as "upper, lower, front, back", etc., are only to better facilitate ordinary technicians in the field to understand the technical solution of the present invention, and do not limit the technical solution of the present invention.

[0054] like Figure 1 As shown, the present invention relates to a dropper bottle, which consists of a first finished product 1 and a second finished product 2. The first finished product 1 consists of a bottle cap 100 and a bottle body 200. The bottle cap 100 includes a piston and a screw cap, and a one-way valve is provided under the piston. The dropper bottle is mainly used for packaging two materials, which can be mixed manually. Material A is loaded into the inner liner of the piston, and material B is loaded into the bottle body 200. The bottle cap 100 and the bottle body 200 are fixed and sealed to maintain the activity of the two materials.

[0055] like Figure 2-3 As shown, the bottle cap 100 includes: a push rod 101, a push rod plug 104, a push rod lock 300, an inner liner 107, a screw cap 105, a first tightening plate 109, a second tightening plate 110, a valve plate gland 111, a silicone valve plate 112, and an inner liner screw cap 113. One end of the push rod 101 is a pressing portion, and the other end is a protruding portion 103. A fixing portion 102 is between the pressing portion and the protruding portion 103. The fixing portion 102 mainly serves to stabilize the push rod 101; the protruding portion 103 at the front end of the push rod 101 is connected and fixed to the push rod plug 104, the push rod 101 and the inner liner 107 form a piston structure, the end head of the inner liner 107 is provided with a circular step 106, and the inner liner 107 The front end of the liner is provided with a threaded opening 108, and the inner part of the inner liner screw cover 103 is provided with a silicone valve sheet 112, a valve sheet pressure cover 111 and a second tightening sheet 110 in sequence to form a screw cover body.

[0056] like Figure 4As shown, the push rod plug 104 and the inner wall of the inner liner 105 are provided with sliding airtight points; preferably, an exhaust hole 122 is provided on the upper part of the inner liner 107, which is sealed by the push rod plug 104; the push rod lock 300 is movably connected to the push rod 101 and locks the push rod 101, that is, the pushing stroke of the push rod 101 is limited; the push rod lock 300 is preferably a U-shaped buckle and has a handle 301 for easy carding. When the push rod lock 300 is clamped on the push rod 101, it limits the push rod 101 and positions the push rod plug 104 at the position of the closed exhaust hole 122; the push rod plug 104 has a hollow cylindrical structure, and the outer surface of the push rod plug 104 is radially spaced with a concave ring 121 and a convex ring 123, and the convex ring 123 can block the exhaust hole 122; when the push rod 101 is pressed, the convex ring 123 of the push rod plug 104 is misaligned with the exhaust hole 122, the exhaust hole 122 is opened, and air is left in the space inside the concave ring 121, which can prevent the push rod plug 104 from sticking to the inner wall of the liner 107. The number of concave rings 121 and convex rings 123 can be set according to needs, and generally two concave rings 121 and three convex rings 123 can be set; the threaded opening 108 is connected to the screw cap body; the liner 107 is connected to the screw cap 113 through the first buckle position 114 The screw cap 105 is provided with a first tightening piece 109, the opening 201 of the bottle body 200 is provided with a thread, the screw cap 105 is screwed with the opening 201 of the bottle body 200, one end of the push rod 101 is a pressing part, the other end is a convex part 103, between the pressing part and the convex head 103 is a fixing part 102, the convex part (103) is connected and fixed with the push rod rubber plug (104). The one-way valve is generally in a sealed state, and it will open when there is an air pressure shock. This valve is an opening in one or more closed states, preferably a cross structure, a straight structure or an arc structure, and the above structures can also be combined.

[0057] like Figure 7-10As shown, the second finished product 2 comprises: an outer cover 21, a pressure cover 22, an inner cover 23, a rubber head 24, a third tightening piece 25, an inner plug 26 and a dropper 27, the top of the outer cover 21 is provided with a first circular hole step 29, the lower end of the pressure cover 22 is provided with a second circular hole step 30, the outer cover 21 is sleeved outside the pressure cover 22, the inner diameter of the circular hole of the first circular hole step 29 is smaller than the outer diameter of the second circular hole step 30, and the inner part of the outer cover (21) is provided with a third circular hole step 30. The top of the inner cover (23) is fitted with the third circular hole step (32), and the lower part of the inner cover (23) is fixed to the outer cover (21) through the third buckle point (33); the top of the inner cover 23 is stuck in the groove below the rubber head 24, the outer cover 21 is sleeved outside the inner cover 23, the inner cover 23 and the outer cover 21 are fixed through the third buckle point 33, the dropper 27 is connected to the rubber head 24, and the rubber head 24 The head 240 is cylindrical and has a cavity, the body 241 of the rubber head 24 is a ladder column type, the diameter of the head of the rubber head 24 is smaller than the diameter of the body 241 of the rubber head 24, but the cavity of the head is larger than the diameter of the body, there is a gap H between the top of the inner cover 23 and the second circular hole step 30 of the pressure cover 22, and the gap H is the up and down travel space of the pressure cover 22 when pressing, when the pressure cover 22 is pressed, the rubber head 24 is compressed and deformed, the air in the rubber head 24 is discharged, and a negative pressure is formed in the dropper 27 to absorb the material in the bottle, and when there is no external force, the rubber head 24 returns to its original state (i.e., rebounds back to its original state), and the pressure cover 22 rebounds to an unpressed state; the inner side of the inner cover 23 is provided with a thread and a second buckle point 28, and the second buckle point 28 It is used to clamp the inner plug 26, which is hollow for the dropper 27 to pass through; the lower end of the rubber head 24 is provided with a groove 242 and a circular baffle 243, the fourth circular hole step 31 is clamped in the groove 242, and a third tightening piece 25 is provided between the top of the inner plug 26 and the circular baffle 243.

[0058] like Figure 11-13 As shown, when the first finished product is used, the piston is pushed to the bottom, and the material A enters the bottle body 200 through the one-way valve. Then the bottle cap is discarded, and the second finished product 2 is connected to the bottle body 200 to form a dropper bottle 3. When the opening 201 of the bottle body 200 is connected to the second finished product 2, the inner plug 26 is sealed with the opening 201, and the friction between the inner plug 26 and the inner wall of the opening 201 is greater than the friction between the inner plug 26 and the inner cover 23. At this time, the inner plug 26 remains in the bottle body 200.

[0059] The push rod lock 300 is a C-shaped buckle, and the C-shaped buckle is clamped on the push rod 101;

[0060] The outer cover 21, the inner cover 22, the rubber head 24, and the push rod lock 300 are integrally formed;

[0061] The material of the rubber head 24 is thermoplastic plastic or thermoplastic elastomer or thermosetting elastomer;

[0062] The fluidity of the thermoplastic elastomer or thermosetting elastomer is under a load of 2.16 kg and at a temperature of 190° C. or 260° C., the MFI fluidity of the material is >50 g / 10 min, and the associated elastic modulus is <300 MPa.

[0063] A method for assembling a detachable double-material mixing dropper bottle, based on the assembling method of the detachable double-material mixing dropper bottle, comprises the following steps:

[0064] S1. Prefabricated first finished product 1

[0065] 1.1 First, the push rod 101 and the push rod rubber plug 104 form a piston, and the inner liner 107 is connected to the screw cap 105 through the first buckle position 114, and then the push rod lock 300 is clamped on the push rod 101 to limit the position of the push rod 101, and the push rod 101 of the piston is pushed into the inner liner 107 to form a piston structure with the inner liner 107; when the push rod lock 300 is clamped on the push rod 101, the push rod rubber plug 104 just blocks the exhaust hole 122 provided on the upper part of the inner liner 107 and locks the push rod 101;

[0066] The silicone valve sheet 112, the valve sheet gland 111 and the second tightening sheet 110 are fixed in the inner tank screw cover 113 to form a screw cover body;

[0067] A first tightening sheet 109 is provided inside the rotary cover 105;

[0068] Then, the inner container 107 is filled with material A, and the screw cap is screwed onto the threaded opening 108 of the inner container 105 to form a one-way valve. The material A is sealed in the inner container 107, and the material A will not move downward without external force.

[0069] 1.2 Finally, the screw cap 105 is screwed onto the opening 201 of the bottle 200 filled with the material B;

[0070] S2. Prefabricate the second finished product 2

[0071] 2.1 First, the inner cover 23 is passed downward from the top of the rubber head 24, and the fourth circular hole step 31 on the inner cover 23 is clamped in the groove 242 of the rubber head 24;

[0072] 2.2 Then put the pressure cover 22 on the rubber head 24, and then put the outer cover 21 on the top of the pressure cover 22;

[0073] 2.3 Fix the upper protrusion 270 of the dropper 27 into the rubber head 24;

[0074] 2.4 Insert the third tightening piece 25 and the inner plug 26 into the dropper 27 in sequence, and fix the inner plug 26 to the inner cover 23 via the second buckle point 28 arranged on the inner wall.

[0075] The lower part of the inner cover 23 is fixed to the outer cover 21 via the third buckle point 33, and the first circular hole step 29 fits with the second circular hole step 30; a gap H is left between the top of the inner cover 23 and the second circular hole step 30 of the pressure cover 22, and the gap H is the up and down travel space of the pressure cover 22.

[0076] Steps for use:

[0077] 1. First finished product mixing

[0078] Pull out the push rod lock 300, press the push rod 101 to the bottom, so that the material A passes through the silicone valve sheet 112 on the inner liner and enters the bottle body 200 to mix with the material B; when using, shake it to mix the material A and the material B evenly;

[0079] 2. Keep the bottle body

[0080] After mixing, unscrew the cover 100, discard the cover 100, and only keep the bottle body 200;

[0081] 3. The second finished product is assembled on the bottle body

[0082] The second finished product 2 is screwed onto the bottle body 200 to form a final product 3 , and the inner plug 26 remains in the bottle body 200 .

[0083] The final product after the material A and the material B are mixed in the present invention can be cosmetics, creams, perfumes, water solvents, and emulsions.

[0084] The push rod 101, the push rod lock 300, the screw cap 105, the valve cover 111, and the inner liner screw cap 113 are made of PP, the inner liner 107 is made of PETG, the first tightening piece 109, the second tightening piece 110, and the third tightening piece 25 are made of PE, and the bottle body is made of glass.

Claims

1. A separate double-material mixing dropper bottle, comprising a first finished product (1) and a second finished product (2), characterized in that: The first finished product (1) is composed of a bottle cap (100) and a bottle body (200); The bottle cap (100) comprises: A piston structure and a rotary cover (105); The piston structure comprises: a push rod (101), a push rod rubber plug (104), a push rod lock (300), an inner liner (107), a first tightening plate (109), a second tightening plate (110), a valve plate pressure cover (111), a silicone valve plate (112), and an inner liner screw cover (113); the end of the inner liner (107) is provided with a circular step (106); the front end of the inner liner (107) is provided with a threaded opening (108); the silicone valve plate (112), the valve plate pressure cover (111) and the second tightening plate (110) are fixed in the inner liner screw cover (113) to form a screw cover body; the screw cover body is screwed onto the threaded opening (108) of the inner liner (107) to form a one-way valve; The material body A is sealed in the inner container (107) of the piston structure; The circular step (106) of the inner container (107) is connected to the screw cap (105) as a whole via a first buckle point (114); An exhaust hole (122) is provided at the upper portion of the inner container (107); One end of the push rod (101) is a pressing portion, and the other end is a convex portion (103). A fixing portion (102) is located between the pressing portion and the convex portion (103). The convex portion (103) is connected and fixed to the push rod rubber plug (104). The push rod rubber plug (104) is a hollow cylindrical structure. A concave ring (121) and a convex ring (123) are radially spaced apart on the outer surface of the push rod rubber plug (104). The convex ring (123) is used to block the exhaust hole (122). The push rod lock (300) is clamped on the push rod (101) and locks the push rod (101) so that the convex ring (123) of the push rod rubber plug (104) is limited to the exhaust hole (122); and when the push rod (101) is pressed, the convex ring (123) is misaligned with the exhaust hole (122), so that the exhaust hole (122) is opened; The material body B is in the bottle body (200); The bottle cap (100) is screwed onto the bottle body (200); The second finished product (2) comprises a dropper (27).

2. The separate double-material mixing dropper bottle as claimed in claim 1, characterized in that: The second finished product (2) comprises: an outer cover (21), a pressure cover (22), an inner cover (23), a rubber head (24), a third tightening plate (25), an inner plug (26) and a dropper (27), wherein the top of the outer cover (21) is provided with a first circular hole step (29), the lower end of the pressure cover (22) is provided with a second circular hole step (30), the pressure cover (22) is sleeved in the outer cover (21), the inner diameter of the circular hole of the first circular hole step (29) is smaller than the outer diameter of the second circular hole step (30), the inner part of the outer cover (21) is provided with a third circular hole step (32), the top of the inner cover (23) is in contact with the third circular hole step (32), the lower part of the inner cover (23) is in contact with the outer cover (21), and the third circular hole step (32) is in contact with the inner cover (23). The cover (21) is fixed by a third buckle point (33), the dropper (27) is connected to the rubber head (24), the head of the rubber head (24) is a cylindrical cavity structure, the top of the inner cover (23) is provided with a fourth circular hole step (31), the rubber head (24) is connected to the inner cover (23), and the lower end of the rubber head (24) is provided with a groove (242) and a circular baffle (243); the inner side of the inner cover (23) is provided with a thread and a second buckle point (28), the second buckle point (28) is used to clamp the inner plug (26), the inner plug (26) is hollow, and a third tightening plate (25) is provided between the top (260) of the inner plug (26) and the circular baffle (243).

3. The separate double-material mixing dropper bottle as claimed in claim 1, characterized in that: The push rod lock (300) is a C-shaped buckle, which is movably connected to the push rod (101) and has a handle (301) on it.

4. The separate double-material mixing dropper bottle as claimed in claim 2, characterized in that: The fourth circular hole step (31) is snap-fitted into the groove (242).

5. The separate double-material mixing dropper bottle as claimed in claim 2, characterized in that: The material of the rubber head (24) is thermoplastic plastic, thermoplastic elastomer or thermosetting elastomer.

6. The separate double-material mixing dropper bottle as claimed in claim 2, characterized in that: The push rod (101), the push rod lock (300), the screw cap (105), the valve plate pressure cap (111), and the inner liner screw cap (113) are made of PP; the inner liner (107) is made of PETG; the first tightening plate (109), the second tightening plate (110), and the third tightening plate (25) are made of PE; and the bottle body (200) is made of glass.

7. A method for assembling a detachable double-material mixing dropper bottle, based on the detachable double-material mixing dropper bottle as claimed in claim 2, comprising the following steps: S1. Prefabricated first finished product (1) 1.1 First, the push rod (101) and the push rod rubber plug (104) form a piston, and the inner liner (107) is connected to the screw cap (105) through the first buckle point (114), and then the push rod lock (300) is clamped on the push rod (101) to limit the position of the push rod (101), and the push rod (101) of the piston is pushed into the inner liner (107) to form a piston structure with the inner liner (107); when the push rod lock (300) is clamped on the push rod (101), the push rod rubber plug (104) just blocks the exhaust hole (122) provided on the upper part of the inner liner (107) and locks the push rod (101); A first tightening sheet (109) is provided inside the rotary cover (105); The silicone valve sheet (112), the valve sheet pressure cover (111) and the second tightening sheet (110) are fixed in the inner tank rotary cover (113) to form a rotary cover body; The inner container (107) is then filled with material A, and the screw cap is screwed onto the threaded opening (108) of the inner container (107) to form a one-way valve, so that the material A is sealed in the inner container (107) and the material A will not move downward without external force; 1.2 Finally, the screw cap (105) is screwed onto the opening (201) of the bottle (200) filled with the material B; S2. Prefabricated second finished product (2) 2.1 First, the inner cover (23) is passed downward from the top of the rubber head (24), and the fourth circular hole step (31) on the inner cover (23) is clamped in the groove (242) of the rubber head (24); 2.2 Then put the gland (22) on the rubber head (24), and then put the outer cover (21) on the top of the gland (22); 2.3 Fix the upper protrusion (270) of the dropper (27) into the rubber head (24); 2.4 Insert the third tightening piece (25) and the inner plug (26) sequentially into the dropper (27), and fix the inner plug (26) to the inner cover (23) via the second buckle point (28) arranged on the inner wall.

8. The assembly method of the separate dual-material mixing dropper bottle according to claim 7, characterized in that: The lower part of the inner cover (23) is fixed to the outer cover (21) via a third buckle point (33), and the first circular hole step (29) fits with the second circular hole step (30); a gap (H) is left between the top of the inner cover (23) and the second circular hole step (30) of the pressure cover (22), and the gap (H) is the up and down travel space for the pressure cover (22) to be pressed.

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