Dry powder spray bottle

Abstract

A dry powder spray bottle includes a bottle body, an upper cap, and a nozzle. The bottle body comprises an outer bottle and an inner bottle, with the inner bottle disposed inside the outer bottle. A piston and a large one-way air inlet valve are sequentially arranged between the lower end of the inner bottle and the inner wall of the outer bottle. A powder storage chamber is formed above the piston. An air bladder structure is formed between the lower end of the large one-way air inlet valve and the inner wall of the outer bottle. A rotating powder stirring mechanism is provided between the lower end of the inner bottle and the bottom of the outer bottle. The rotating powder stirring mechanism includes a stirring mechanism and a rotating mechanism. The upper end of the stirring mechanism is sealed through the large one-way air inlet valve, and the piston is disposed in the inner bottle. A small one-way valve is provided within the stirring mechanism. When the nozzle is pressed, the small one-way valve opens, and the gas in the air bladder structure is delivered to the inner bottle through the small one-way valve and sprayed out from the nozzle along with the dry powder. A sealing mechanism is provided between the nozzle and the inner bottle to close the powder outlet channel. This invention has a reasonable structure, ensuring smooth powder dispensing, stable powder output, good sealing performance, and convenient use.

Description

Technical Field

[0001] The invention relates to a container for containing dry powder, in particular to a dry powder spray bottle. Background Art

[0002] At present, there are many powder products on the market, such as prickly heat powder, talcum powder, medicinal powder, gold powder, etc., which are generally squeezed out for use, or many small holes are opened on the bottle cap to pour out the powder for use. Although the above two methods are more convenient, they have the disadvantages of difficult control of the powder output and easy clogging of the small holes.

[0003] Spray bottles are often used to hold cosmetic liquids, etc. When in use, the cosmetic liquid is sprayed by pressing the head cap. However, dry powder does not have the same fluidity as liquid. In order to make dry powder also be used in a spray manner like liquid, many dry powder sprayers have now appeared.

[0004] After investigation, the existing Chinese patent number CN201210140679.5 "A Spray Bottle" includes: a bottle body containing dry powder; characterized by: a hollow delivery pipe, the upper end of which is connected to the nozzle of the head cap, and the lower end is fixed to the column of the pump body and connected to the center hole; a connector, the upper end of which is sealed and docked with the lower end of the pump body, the middle of which is provided with a powder outlet channel coaxially connected to the delivery pipe, the bottom of the powder outlet channel is provided with a base for mixing powder and airflow, the side of the base is provided with a powder inlet connected to the inner cavity of the bottle body, a group of manipulators are arranged on the side of the connector, the upper end of which is rotatably mounted on the connector, and the lower end is adapted to the powder inlet of the base, a push rod, which is movably inserted into the inner hole of the delivery pipe, the upper end is connected to the piston, and the lower end passes through the center hole of the pump body and is placed in the powder outlet channel of the connector, and the push rod drives the manipulator to push the dry powder in the bottle body into the base. The spray bottle is convenient and quick to use and not easy to be blocked. However, dry powder is easily affected by moisture, and a hole will appear after each spray, affecting the spray effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a dry powder spray bottle with a reasonable structure and a stable and controllable powder output in view of the above technical status quo.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a dry powder spray bottle, including a bottle body, an upper cover and a head cap with a spray port, characterized in that: the bottle body includes an outer bottle and an inner bottle, the inner bottle is arranged in the outer bottle, a piston and a large one-way air inlet valve are arranged in sequence between the lower end of the inner bottle and the inner wall of the outer bottle, a powder storage chamber is formed above the piston, an air bag structure is formed between the lower end of the large one-way air inlet valve and the inner wall of the outer bottle, a rotating powder stirring mechanism is arranged between the lower end of the inner bottle and the bottom of the outer bottle, the rotating powder stirring mechanism includes a powder stirring mechanism and a rotating mechanism, wherein the upper end of the powder stirring mechanism is sealed and arranged in the inner bottle after passing through the large one-way air inlet valve and the piston, a small one-way valve is arranged in the powder stirring mechanism, when the head cap is pressed, the small one-way valve is opened, and the gas in the air bag structure is transported to the inner bottle through the small one-way valve and sprayed from the head cap together with the dry powder, and a sealing mechanism that can close the powder outlet channel is provided between the head cap and the inner bottle.

[0007] As an improvement, the sealing mechanism is a rotary sealing mechanism, including a switch, which is arranged at the upper opening position of the inner bottle, a through hole is opened in the middle of the switch, the lower end of the switch is connected to the conveying pipe, the upper end of the switch is provided with a switch seat, and a powder outlet is opened at the upper end of the switch seat. The head cap is rotatably arranged on the switch, and a plug that can close the powder outlet is convexly provided on the inner wall of the lower end surface of the head cap. When the head cap is rotated into place, the plug just seals the powder outlet, and the outer side of the head cap is provided with a three-dimensional rotating arrow mark for closing and opening.

[0008] Furthermore, the lower end surface of the switch is formed with a cylindrical socket around the through hole for the upper end of the conveying tube to be inserted, the switch has a circular outer edge that abuts against the upper end of the inner bottle, the upper end of the switch is provided with an annular groove for the lower end of the head cap to be inserted and rotated, the inner wall of the annular groove is provided with a circle of annular convex ribs, the lower end of the head cap is convexly provided with a cylindrical structure that cooperates with the annular groove, and the inner wall of the cylindrical structure is concavely provided with an annular concave rib that cooperates with the annular convex rib.

[0009] A further improvement is that the upper end of the inner bottle is a reduced diameter external thread section, a screw coil is threadedly connected to the upper end of the inner bottle, the upper end of the screw coil is formed with an annular groove for the lower end of the head cap to be placed in, the upper end of the screw coil is provided with an annular inner edge, the switch is arranged on the inner bottle and is positioned by the annular inner edge of the screw coil and the circular outer edge of the switch, and a gasket is lined between the circular outer edge of the switch and the upper end surface of the inner bottle.

[0010] Furthermore, the upper part of the piston abuts against the inner wall of the lower end of the inner bottle, the lower part of the piston abuts against the inner wall of the outer bottle, a large one-way air intake valve is arranged at the lower end of the piston, the large one-way air intake valve is a cover ring-shaped structure with an opening in the middle, a slot is provided at the lower end of the piston for inserting the outer ring of the large one-way air intake valve, the outer ring of the large one-way air intake valve is inserted in the slot, the inner ring of the large one-way air intake valve abuts against the lower inner wall of the piston, and a spring is supported between the lower end of the piston and the bottom of the outer bottle.

[0011] Furthermore, the spring can be a metal spring or a plastic spring, and the upper end surface of the piston is provided with a reduced diameter opening for positioning the powder stirring mechanism. The powder stirring mechanism includes a hollow cylinder, and a plurality of powder stirring blocks are provided outward from the upper end of the cylinder. A V-shaped rotating block is convexly provided on one side of the lower end of the cylinder. The rotating mechanism includes a rotating outer cylinder and a rotating inner cylinder. The height of the rotating outer cylinder is greater than that of the rotating inner cylinder. The inner wall of the rotating outer cylinder and the wall of the rotating inner cylinder are provided with rotating teeth that cooperate with the rotating blocks to rotate the powder stirring mechanism.

[0012] Furthermore, the number of the rotating teeth is 2 to 6 and is evenly spaced, and the rotation angle of the powder stirring mechanism after the head cap is pressed once is determined according to the number of the rotating teeth.

[0013] Furthermore, a positioning groove is formed at the bottom of the outer bottle for the lower end of the rotating mechanism to be placed in, the lower end of the rotating outer cylinder is arranged in the positioning groove, and the rotating inner cylinder is arranged in the rotating outer cylinder.

[0014] Furthermore, the conveying pipe is a straight pipe, and a quantity control cover which can control the powder output is installed at the lower end of the conveying pipe. The upper end of the quantity control cover is sleeved and fixed with the lower end of the conveying pipe, and a bell mouth is provided at the lower end of the quantity control cover.

[0015] Finally, an internal threaded opening is provided at the upper end of the outer bottle, and the position of the inner bottle corresponding to the internal threaded opening is a reduced diameter section. The lower end of the shoulder sleeve has an external thread corresponding to the internal threaded opening of the outer bottle. The shoulder sleeve is threadedly connected to the upper end of the outer bottle, and the lower end of the shoulder sleeve is against the step of the inner bottle. There is a certain gap between the shoulder sleeve and the inner bottle, and between the inner bottle and the outer bottle for air flow to pass through. A channel connecting the gap and the airbag structure is arranged between the piston and the large one-way air intake valve, and the channel is also controlled by the closing of the large one-way air intake valve.

[0016] Compared with the prior art, the advantages of the present invention are as follows: a switch and a switch seat are added between the inner bottle and the head cap, and a corresponding plug is provided at the lower end of the head cap. The switch seat can be closed by rotating the head cap, effectively preventing the powder from getting damp; a rotating powder stirring mechanism is provided between the bottom of the inner bottle and the bottom of the outer bottle. Every time the head cap is pressed, the powder stirring mechanism can rotate a certain angle to make the powder in the inner bottle uniform and avoid the generation of voids; an airbag structure is provided between the lower end of the large one-way air inlet valve and the inner wall of the outer bottle. When the head cap is pressed, the airflow in the airbag enters the inner bottle through the small one-way valve, and the dry powder is sprayed out of the head cap through the conveying pipe; a quantity control hood is provided at the lower end of the conveying pipe to control the powder output. The present invention has a reasonable structure, not only the powder output is smooth and the powder output is stable, but also the sealing performance is good, and it is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention in an initial state;

[0018] Figure 2 for Figure 1Schematic diagram of the structure after removing the upper cover and rotating the head cap;

[0019] Figure 3 for Figure 2 Schematic diagram of the structure for pressing the head cap to spray powder;

[0020] Figure 4 This is a schematic diagram of the structure after a powder spraying is completed and the head cap is loosened;

[0021] Figure 5 It is a schematic diagram of the structure after closing the head cap;

[0022] Figure 6 It is a schematic diagram of the structure using a plastic spring;

[0023] Figure 7 for Figure 1 Exploded diagram of

[0024] Figure 8 It is a cross-sectional view of another embodiment 2. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, a dry powder spray bottle comprises a bottle body, an upper cover 20, a head cap 3 with a spray port and a bottom cover 30. The bottle body comprises an outer bottle 1 and an inner bottle 2. The inner bottle 2 is arranged in the outer bottle 1. The upper end of the inner bottle 2 is connected to the outer bottle 1 through a shoulder sleeve 10. A piston 6 and a large one-way air inlet valve 9 are arranged between the lower end of the inner bottle 2 and the inner wall of the outer bottle 1. The inner bottle cavity above the piston 6 forms a powder storage cavity B. An air bag structure A is formed between the lower end of the large one-way air inlet valve 9 and the inner wall of the outer bottle 1. The lower end of the inner bottle 2 and the bottom of the outer bottle 1 are connected. A rotating powder stirring mechanism 8 is provided between the parts, and the rotating powder stirring mechanism 8 includes a powder stirring mechanism 81 and a rotating mechanism 84, wherein the upper end seal of the powder stirring mechanism 81 passes through a large one-way air inlet valve 9, and the piston 6 is arranged in the inner bottle 2, and a small one-way valve 80 is provided in the powder stirring mechanism 81. When the head cap 3 is pressed, the small one-way valve 80 opens, and the gas in the airbag structure A is transported to the inner bottle 2 through the small one-way valve 80 and is sprayed from the head cap 3 together with the dry powder. A sealing mechanism that can close the powder outlet channel is provided between the head cap 3 and the inner bottle 2.

[0028] The sealing mechanism is preferably a rotary sealing mechanism, which includes a switch 4, which is arranged at the upper opening position of the inner bottle 2, a through hole is opened in the middle of the switch 4, the lower end of the switch 4 is connected to the conveying pipe 7, and the upper end of the switch 4 is provided with a switch seat 40, and a powder outlet 401 is opened at the upper end of the switch seat 40. The head cap 3 is rotatably arranged on the switch 4, and a plug 31 for closing the powder outlet 401 is convexly provided on the inner wall of the lower end surface of the head cap 3. When the head cap 3 is rotated into place, the plug 31 just seals the powder outlet 401, and the outer side of the head cap 3 is provided with a three-dimensional rotating arrow mark for closing and opening. The lower end surface of the switch 4 is formed with a cylindrical socket around the through hole for the upper end of the conveying tube 7 to be inserted. The switch 4 has a circular outer edge that abuts against the upper end of the inner bottle 2. The upper end of the switch 4 is provided with an annular groove 41 for the lower end of the head cap 3 to be inserted and rotated. A circle of annular convex ribs 42 are provided on the inner wall of the annular groove 41. The lower end of the head cap 3 is convexly provided with a cylindrical structure that cooperates with the annular groove, and the inner wall of the cylindrical structure is concavely provided with an annular concave rib 32 that cooperates with the annular convex rib.

[0029] The upper end of the inner bottle 2 is a reduced diameter external thread section, and a screw ring 5 is threadedly connected to the upper end of the inner bottle 2. The upper end of the screw ring 5 is formed with an annular groove 51 for the lower end of the head cap 3 to be placed in. The upper end of the screw ring 5 is provided with an annular inner edge 52. The switch 4 is arranged on the inner bottle 2 and is positioned by the annular inner edge 52 of the screw ring 5 and the circular outer edge 43 of the switch 4. A gasket 50 is lined between the circular outer edge 43 of the switch 4 and the upper end surface of the inner bottle 2.

[0030] The upper part of the piston 6 abuts against the inner wall of the lower end of the inner bottle 2, and the lower part of the piston 6 abuts against the inner wall of the outer bottle 1, which is usually a movable seal. A large one-way air intake valve 9 is arranged at the lower end of the piston 6. The large one-way air intake valve 9 is a cover ring-shaped structure with an opening in the middle. A slot 61 is provided at the lower end of the piston 6 for inserting the outer ring of the large one-way air intake valve 9. The outer ring of the large one-way air intake valve 9 is inserted in the slot 61. The inner ring 91 of the large one-way air intake valve 9 abuts against the lower inner wall of the piston 6, which is usually a movable seal. A spring 60 is supported between the lower end of the piston 6 and the bottom of the outer bottle 1, so that the piston 6 has a tendency to always move upward. The spring 60 may be a metal spring or a plastic spring. The upper end surface of the piston 6 is provided with a positioning reduced diameter opening 62 for inserting the stirring mechanism 81. The stirring mechanism 81 includes a hollow cylinder 8a. The upper end of the cylinder 8a is provided with a plurality of stirring blocks 8b, which are usually evenly distributed around the circumference. A V-shaped rotating block 8c is convexly provided on one side of the lower end of the cylinder 8a. The rotating mechanism 84 includes a rotating outer cylinder 82 and a rotating inner cylinder 83. The height of the rotating outer cylinder 82 is greater than that of the rotating inner cylinder 83. The inner wall of the rotating outer cylinder 82 and the wall of the rotating inner cylinder 83 are provided with rotating teeth 831 that cooperate with the rotating block 8c to rotate the stirring mechanism 81. The rotating teeth 831 are evenly spaced 2 to 6. After pressing the head cap 3 once, the rotation angle of the stirring mechanism 81 is determined according to the number of rotating teeth 831. In this embodiment, there are four rotating teeth 831, and the stirring mechanism 81 rotates 90° after pressing the head cap 3 once. The bottom of the outer bottle 1 is formed with a positioning groove 11 for the lower end of the rotating mechanism to be placed in. The lower end of the rotating outer cylinder 82 is set in the positioning groove 11, and the rotating inner cylinder 83 is set in the rotating outer cylinder 82. The bottoms of the two are flush. Similar rotating mechanisms can also refer to the rotating color-changing mechanism of the ballpoint pen core.

[0031] The conveying pipe 7 is a straight pipe, and a quantity control cover 70 for controlling the powder output is installed at the lower end of the conveying pipe 7. The upper end of the quantity control cover 70 is sleeved and fixed with the lower end of the conveying pipe 7, and the lower end of the quantity control cover 70 is provided with a bell mouth.

[0032] The upper end of the outer bottle 1 is provided with a circle of convex ribs, and the corresponding position of the inner bottle 2 is a reduced diameter section. The lower end of the shoulder sleeve 10 has an inner concave rib corresponding to the convex rib of the outer bottle 1. The shoulder sleeve 10 is clamped on the upper end of the outer bottle 1, and the lower end of the shoulder sleeve 10 is against the step of the inner bottle 2. There is a certain gap 100 between the shoulder sleeve 10 and the inner bottle 2, and between the inner bottle 2 and the outer bottle 1 for air flow to pass through. A channel 200 is arranged between the piston 6 and the large one-way air intake valve 9 to connect the gap 100 between the inner bottle 2 and the outer bottle 1 and the airbag structure A, and the channel 200 is also controlled by the closing of the large one-way air intake valve 9. The arrangement of the channel 200 can be flexibly arranged and is not limited to the example diagram of this embodiment. The upper cover 20 is a transparent cover, which is arranged outside the shoulder sleeve 10 and flush with the bottle body. The upper end of the outer bottle 1 is provided with a reduced diameter external threaded connection section, and the bottom cover 30 is fixed to the lower end of the outer bottle 1 by clamping the convex ribs and the concave ribs.

[0033] The working principle of the present invention is: using the principle of using air to carry dry powder to spray out the head cap 3, since dry powder is easily affected by moisture, a rotary sealing mechanism is provided at the head cap 3. Since dry powder does not have good fluidity, a cavity will appear after each spraying, so a rotary powder stirring mechanism 8 is provided at the lower end of the inner bottle 2, so that each time the head cap 3 is pressed, the powder stirring action can be performed; a quantity control cover 70 is provided below the conveying pipe 7, which can well control the powder output, and the powder output can also be controlled by adjusting the size of the bell mouth of the quantity control cover 70.

[0034] The specific operation process is as follows:

[0035] 1. Initial state, such as Figure 1 The plug 31 at the lower end of the head cap 3 abuts against the powder outlet 401 of the switch seat 40, so that the dry powder in the inner bottle 2 is isolated from the outside and will not be affected by moisture, and always remains dry;

[0036] 2. Remove the upper cover 20 and rotate the head cap 3 to open the powder outlet 401 of the switch seat 40. Figure 2 As shown, the dry powder forms a passage with the outside world, which allows the powder to be discharged smoothly;

[0037] 3. Press the head cap 3, the inner bottle 2 moves down, and the small one-way valve 80 opens. Figure 3 As shown, the airbag structure A is continuously reduced, and the airflow passes through the small one-way valve 80, and the dry powder is carried through the conveying pipe 7 and sprayed out of the head cap opening. At the same time, the powder stirring mechanism 81 stirs the dry powder while rotating 90°.

[0038] Fourth, loosen the head cap 3, and under the action of the spring 60, the inner bottle 2 and the head cap 3 move upward, such as Figure 4 As shown, the small one-way valve 80 is closed to prevent dry powder from being sucked into the airbag A, while the large one-way air inlet valve 9 is opened to allow air to enter the airbag A. During the process of loosening the head cap 3, the powder stirring mechanism 81 rotates again to prepare for the next powder spraying;

[0039] Fifth, after use, turn the head cap 3 to close the powder outlet 401 to prevent the dry powder from getting wet.

[0040] Example 2

[0041] See also Figure 8 The head cap 3 is arranged on the switch 4, and a one-way valve seat 33 is convexly provided on the inner wall of the lower end surface of the top of the head cap 3. A spring 35 and a sealing bead 34 are arranged in the one-way valve seat 33, so that the sealing bead 34 and the powder outlet 401 cooperate to realize the closed one-way valve, so that a sealing mechanism that can close the powder outlet channel is provided between the head cap 3 and the inner bottle 2; the rest is similar to embodiment 1.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dry powder spray bottle, comprising a bottle body, an upper cover and a head cap with a spray port, characterized in that: The bottle body comprises an outer bottle and an inner bottle, the inner bottle is arranged in the outer bottle, a piston and a large one-way air inlet valve are arranged in sequence between the lower end of the inner bottle and the inner wall of the outer bottle, a powder storage chamber is formed above the piston, an air bag structure is formed between the lower end of the large one-way air inlet valve and the inner wall of the outer bottle, a rotating powder stirring mechanism is arranged between the lower end of the inner bottle and the bottom of the outer bottle, the rotating powder stirring mechanism comprises a powder stirring mechanism and a rotating mechanism, wherein the upper end of the powder stirring mechanism is sealed through the large one-way air inlet valve and the piston and then arranged in the inner bottle, a small one-way valve is arranged in the powder stirring mechanism, when the head cap is pressed, the small one-way valve is opened, and the gas in the air bag structure is transported to the inner bottle through the small one-way valve and sprayed out from the head cap together with the dry powder, and a sealing mechanism that can close the powder outlet channel is arranged between the head cap and the inner bottle; The sealing mechanism is a rotary sealing mechanism, including a switch, which is arranged at the upper opening position of the inner bottle, a through hole is opened in the middle of the switch, a conveying pipe is connected to the lower end of the switch, a switch seat is arranged at the upper end of the switch, a powder outlet is opened at the upper end of the switch seat, a head cap is rotatably arranged on the switch, a plug which can close the powder outlet is convexly provided on the inner wall of the lower end surface of the head cap, when the head cap is rotated into place, the plug just seals the powder outlet, and a three-dimensional rotating arrow mark for closing and opening is provided on the outer side of the head cap; The lower end surface of the switch is formed with a cylindrical socket around the through hole for the upper end of the conveying tube to be inserted. The switch has a circular outer edge that abuts against the upper end of the inner bottle. The upper end of the switch is provided with an annular groove for the lower end of the head cap to be inserted and rotated. A circle of annular convex ribs is provided on the inner wall of the annular groove. The lower end of the head cap is convexly provided with a cylindrical structure that cooperates with the annular groove, and the inner wall of the cylindrical structure is concavely provided with an annular concave rib that cooperates with the annular convex rib.

2. The dry powder spray bottle according to claim 1, characterized in that: The upper end of the inner bottle is an external threaded section with a reduced diameter, and a screw ring is threadedly connected to the upper end of the inner bottle. The upper end of the screw ring is formed with an annular groove for the lower end of the head cap to be placed in, and the upper end of the screw ring is provided with an annular inner edge. The switch is arranged on the inner bottle and positioned by the annular inner edge of the screw ring and the circular outer edge of the switch. A gasket is lined between the circular outer edge of the switch and the upper end surface of the inner bottle.

3. The dry powder spray bottle according to claim 2, characterized in that: The upper part of the piston abuts against the inner wall of the lower end of the inner bottle, and the lower part of the piston abuts against the inner wall of the outer bottle. A large one-way air intake valve is arranged at the lower end of the piston. The large one-way air intake valve is a cover ring-shaped structure with an opening in the middle. A slot is provided at the lower end of the piston for inserting the outer ring of the large one-way air intake valve. The outer ring of the large one-way air intake valve is inserted in the slot. The inner ring of the large one-way air intake valve abuts against the lower inner wall of the piston. A spring is supported between the lower end of the piston and the bottom of the outer bottle.

4. The dry powder spray bottle according to claim 3, characterized in that: The spring is a metal spring or a plastic spring, and the upper end surface of the piston is provided with a reduced diameter opening for positioning the powder stirring mechanism. The powder stirring mechanism includes a hollow cylinder, and a plurality of powder stirring blocks are provided outwardly from the upper end of the cylinder. A V-shaped rotating block is convexly provided on one side of the lower end of the cylinder. The rotating mechanism includes a rotating outer cylinder and a rotating inner cylinder. The height of the rotating outer cylinder is greater than that of the rotating inner cylinder. The inner wall of the rotating outer cylinder and the wall of the rotating inner cylinder are provided with rotating teeth that cooperate with the rotating blocks to rotate the powder stirring mechanism.

5. The dry powder spray bottle according to claim 4, characterized in that: The number of the rotating teeth is 2 to 6 and is evenly spaced. After the head cap is pressed once, the rotation angle of the powder stirring mechanism is determined according to the number of the rotating teeth.

6. The dry powder spray bottle according to claim 5, characterized in that: The bottom of the outer bottle is formed with a positioning groove for the lower end of the rotating mechanism to be placed in, the lower end of the rotating outer cylinder is arranged in the positioning groove, and the rotating inner cylinder is arranged in the rotating outer cylinder.

7. The dry powder spray bottle according to any one of claims 1 to 6, characterized in that: The conveying pipe is a straight pipe, and a quantity control cover capable of controlling the powder output is installed at the lower end of the conveying pipe. The upper end of the quantity control cover is sleeved and fixed with the lower end of the conveying pipe, and a bell mouth is arranged at the lower end of the quantity control cover.

8. The dry powder spray bottle according to any one of claims 1 to 6, characterized in that: The upper end of the outer bottle is provided with an internal threaded opening, and the position of the inner bottle corresponding to the internal threaded opening is a reduced diameter section. The lower end of the shoulder sleeve has an external thread corresponding to the internal threaded opening of the outer bottle. The shoulder sleeve is threadedly connected to the upper end of the outer bottle, and the lower end of the shoulder sleeve is abutted against the step of the inner bottle. There is a certain gap between the shoulder sleeve and the inner bottle, and between the inner bottle and the outer bottle for air flow to pass through. A channel connecting the gap and the airbag structure is arranged between the piston and the large one-way air intake valve, and the channel is also controlled by the closing of the large one-way air intake valve.

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