Electronic cigarette with self-cleaning structure

Abstract

The invention belongs to the technical field of electronic cigarettes, and discloses an electronic cigarette with a self-cleaning structure. The electronic cigarette with the self-cleaning structure comprises a machine shell, an oil storage bottle, an air storage bottle, a cigarette outlet mechanism, an atomization mechanism and a self-cleaning mechanism. According to the electronic cigarette with the self-cleaning structure, through the design of the self-cleaning mechanism, a smoke channel in the electronic cigarette can be flushed through compressed gas, dirt deposited in the smoke channel can be washed away and removed through gas flowing at a high speed, and the adverse effect of the deposited dirt on work of the electronic cigarette can be effectively reduced; the problems proposed in the background technology are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarettes, and in particular to an electronic cigarette with a self-cleaning structure. Background Art

[0002] The basic working principle of electronic cigarettes in the prior art is: using an atomizer to heat the e-liquid to atomize the e-liquid, and the e-liquid vapor passes through the atomization channel to reach the mouthpiece for the user to inhale; however, after the electronic cigarette has been used for many times, the atomized e-liquid vapor and water vapor in the atomization channel will be deposited on the surface of the channel, which will reduce the channel aperture, making it difficult to inhale when used again, making it difficult for the atomizer to dissipate heat and cause malfunctions, and the deposited dirt will bring odors, affecting the user experience. Therefore, we propose an electronic cigarette with a self-cleaning structure. Summary of the invention

[0003] The object of the present invention is to provide an electronic cigarette with a self-cleaning structure, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electronic cigarette with a self-cleaning structure, including a housing, an oil storage bottle, a gas storage bottle, a smoke outlet mechanism, an atomization mechanism and a self-cleaning mechanism.

[0005] The oil storage bottle is arranged in the casing, and the bottle mouth of the oil storage bottle is located on the side wall of the casing and is provided with a sealing cover for sealing the bottle mouth of the oil storage bottle.

[0006] The gas storage bottle is arranged in the casing for storing compressed gas, and the bottle mouth of the oil storage bottle is located on the side wall of the casing and is provided with a charging valve.

[0007] The smoke outlet mechanism is arranged on the casing for smoke circulation.

[0008] The atomizing mechanism is installed on the oil storage bottle and is connected with the smoke outlet mechanism, and is used for atomizing the smoke oil to enter the smoke outlet mechanism.

[0009] The self-cleaning mechanism is arranged inside and connected with the gas cylinder. The compressed gas in the gas cylinder is blown into the smoke outlet mechanism through the self-cleaning mechanism to remove dirt. The self-cleaning mechanism is also connected with the smoke outlet mechanism to provide a channel for air inlet and outlet.

[0010] Preferably, the smoke outlet mechanism includes a mixing shell, an adjusting tube, a limiting ring 1, a limiting ring 2, a smoke pipe, a positioning magnetic ring and a connecting hose, the mixing shell is fixedly connected to the inner wall of the casing, the adjusting tube is movably connected to the top wall of the mixing shell, and one end of the adjusting tube away from the mixing shell passes through the top wall of the casing to its outside, the limiting ring 1 is fixedly connected to the top end of the inner wall of the adjusting tube, the limiting ring 2 is fixedly connected to the lower side of the inner wall of the adjusting tube, the smoke pipe is inserted in the adjusting tube, the positioning magnetic ring is fixedly sleeved on the outer wall of the smoke pipe and is between the limiting ring 1 and the limiting ring 2, the top end of the connecting hose is fixedly connected to the bottom end of the smoke pipe, the bottom end of the connecting hose is fixedly connected to the bottom end of the inner wall of the smoke pipe, and pressing the smoke pipe downward can cause the connecting hose to flip and sleeve on the outside of the smoke pipe, the self-cleaning mechanism is connected to the inside of the mixing shell, and the atomizing mechanism is connected to the inside of the mixing shell.

[0011] Preferably, the atomization mechanism includes an atomization shell, a spiral heating wire and oil-absorbing cotton. The atomization shell is fixedly connected to the side wall of the oil storage bottle, the spiral heating wire is fixedly installed on the inner wall of the atomization shell, the oil-absorbing cotton is arranged in the atomization shell, and the oil-absorbing cotton partially passes through the spiral heating wire, and the oil-absorbing cotton also partially passes through the side wall of the oil storage bottle to the inside thereof, and the atomization shell is also connected to the mixing shell.

[0012] Preferably, the self-cleaning mechanism includes a guide tube, an air pipe, a connecting tube 1, a linear motor, a strip hole, a push rod, a movable column, a connecting rod, a sealing cone, airway 1, airway 2, a connecting hole, a limit spring and a connecting tube 2. The guide tube is arranged in the casing and is on the lower side of the mixing shell. One end of the guide tube is connected with the gas storage bottle through the air pipe, and the other end of the guide tube is connected with the outside of the casing through the connecting tube 1. The movable column is inserted into the guide tube, and the linear motor is fixedly installed in the casing. The strip hole is opened at the bottom of the guide tube, one end of the push rod is fixedly connected to the output end of the linear motor, and the other end of the push rod is fixedly connected to the bottom of the movable column through the strip hole. The linear motor can drive the movable column in the guide tube through the push rod. The movable column extends its axial movement, one end of the movable column is fixedly connected to one end of a connecting rod, the other end of the connecting rod is fixedly connected to a sealing cone, the sealing cone is inserted in the air pipe for blocking, the other end of the movable column is movably connected to the inner wall of the guide tube through a limit spring, airway one and airway two are provided in the movable column, the two openings of airway one and the two openings of airway two are respectively located at the top of the movable column and the end surface of the movable column close to the connecting tube one, the connecting hole is provided at the top of the guide tube and is located on the movement trajectory of the openings of airway one and airway two, and the guide tube is also connected with the inside of the mixing shell through the connecting hole, the guide tube is also connected with the bottom wall of the atomizing shell through the connecting tube two, and the top of the atomizing shell is connected with the top end of the side wall of the mixing shell through the nozzle.

[0013] Preferably, an ultraviolet disinfection lamp is embedded in the groove at the top of the movable column, and the bottom wall of the mixing shell is made of transparent material.

[0014] Preferably, the oil storage bottle is connected to the connecting pipe 2 via a switch valve.

[0015] Preferably, a circuit board and a power supply are also provided in the housing for controlling and supplying power to the electronic components.

[0016] Preferably, the limit spring is a compression spring, and the second connecting pipe corresponds to the space where the connecting rod is located in the guide pipe.

[0017] Preferably, a guide strip is provided on the inner wall of the connecting hose, and the guide strip is spiral-shaped.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The electronic cigarette with a self-cleaning structure can use compressed gas to flush the smoke channel in the electronic cigarette through the design of the self-cleaning mechanism, and use high-speed flowing gas to disperse and clear the dirt deposited in the smoke channel, which can effectively reduce the adverse effects of the deposited dirt on the operation of the electronic cigarette and solve the problems raised in the background technology.

[0020] 2. The electronic cigarette with a self-cleaning structure can disinfect the inside of the mixing shell through the design of an ultraviolet disinfection lamp to prevent bacteria from growing inside it after long-term use. The compressed gas in the gas cylinder is used to supply a high-speed airflow. By opening the switch valve, smoke oil can be added to the high-speed airflow, and the smoke channel is flushed with a high-speed gas-liquid mixture, which can effectively improve the efficiency and effectiveness of self-cleaning. The switching of airway one and airway two can also prevent the backflow of dirt. The design of the smoke pipe and the connecting hose can make the connecting hose flip over to expose its inner wall for high-speed airflow flushing, thereby enhancing the flushing efficiency. The design of the guide strip makes the sediment generated when the smoke flows through the connecting hose concentrated between the guide strips, and the sediment is more easily flushed off after the connecting hose is flipped. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 For the present invention Figure 1 The enlarged view of point B in the middle;

[0024] Figure 4 It is a schematic structural diagram of the connecting hose of the present invention.

[0025] In the figure: 1. casing; 2. oil storage bottle; 3. gas storage bottle; 4. smoke outlet mechanism; 41. mixing shell; 42. regulating tube; 43. limit ring 1; 44. limit ring 2; 45. smoke pipe; 46. positioning magnetic ring; 47. connecting hose; 5. atomization mechanism; 51. atomization shell; 52. spiral heating wire; 53. oil-absorbing cotton; 6. self-cleaning mechanism; 61. guide tube; 62. air pipe; 63. connecting pipe 1; 64. linear motor; 65. strip hole; 66. push rod; 67. movable column; 68. connecting rod; 69. sealing cone; 610. airway 1; 611. airway 2; 612. connecting hole; 613. limit spring; 614. connecting pipe 2; 7. nozzle; 8. ultraviolet disinfection lamp; 9. switch valve; 10. circuit board; 11. power supply; 12. guide strip; 13. cover. DETAILED DESCRIPTION

[0026] See also Figure 1-4 The present invention provides a technical solution: an electronic cigarette with a self-cleaning structure, comprising a housing 1, an oil storage bottle 2, a gas storage bottle 3, a smoke outlet mechanism 4, an atomization mechanism 5 and a self-cleaning mechanism 6. A circuit board 10 and a power supply 11 are also provided in the housing 1 for controlling and powering electronic components, and necessary self-cleaning switch buttons should also be designed on the housing 1 of the electronic cigarette. After being turned on, the electronic components in the electronic cigarette can work according to the preset conditions. The specific design of the power supply 11 and the circuit board 10 is a well-known technology and will not be described in detail.

[0027] The oil storage bottle 2 is arranged in the casing 1, and the bottle mouth of the oil storage bottle 2 is on the side wall of the casing 1 and is provided with a cover 13 for sealing the bottle mouth of the oil storage bottle 2. The so-called oil storage bottle 2 is used to store the smoke oil. After the smoke oil is consumed, the cover 13 can be opened to replenish the smoke oil.

[0028] The gas cylinder 3 is arranged in the casing 1 for storing compressed gas, and the bottle mouth of the oil storage bottle 2 is located on the side wall of the casing 1 and is provided with an inflation valve. The gas cylinder 3 is used to store compressed gas, mainly carbon dioxide gas, and is inflated using a carbon dioxide cylinder. Small carbon dioxide cylinders are widely used in the fields of inflating bicycle tires and inflating life jackets.

[0029] The smoke outlet mechanism 4 is arranged on the housing 1 for smoke circulation.

[0030] The smoke outlet mechanism 4 includes a mixing shell 41, an adjusting tube 42, a limiting ring 1 43, a limiting ring 2 44, a smoke tube 45, a positioning magnetic ring 46 and a connecting hose 47. The mixing shell 41 is fixedly connected to the inner wall of the casing 1, the adjusting tube 42 is movably connected to the top wall of the mixing shell 41, and the end of the adjusting tube 42 away from the mixing shell 41 passes through the top wall of the casing 1 to the outside thereof, the limiting ring 1 43 is fixedly connected to the top of the inner wall of the adjusting tube 42, the limiting ring 2 44 is fixedly connected to the lower side of the inner wall of the adjusting tube 42, the smoke tube 45 is inserted into the adjusting tube 42, and the positioning magnetic ring 46 is fixedly sleeved on the outside of the smoke tube 45 The wall is located between the limit ring 1 43 and the limit ring 2 44. The limit ring 1 43 and the limit ring 2 44 are both iron rings. The inner diameter of the limit ring 2 44 is larger than the outer diameter of the connecting hose 47, and the difference between the two should be sufficient for the connecting hose 47 to be turned over into the mixing shell 41 following the pressing of the smoke pipe 45. The top end of the connecting hose 47 is fixedly connected to the bottom end of the smoke pipe 45, and the bottom end of the connecting hose 47 is fixedly connected to the bottom end of the inner wall of the smoke pipe 45. Pressing the smoke pipe 45 downward can make the connecting hose 47 turn over and sleeve on the outside of the smoke pipe 45. The self-cleaning mechanism 6 is connected to the inside of the mixing shell 41, and the atomizing mechanism 5 is connected to the inside of the mixing shell 41.

[0031] The atomizing mechanism 5 is installed on the oil storage bottle 2 and is connected to the smoke outlet mechanism 4 , and is used for atomizing the smoke oil to enter the smoke outlet mechanism 4 .

[0032] The atomizing mechanism 5 includes an atomizing shell 51, a spiral heating wire 52 and oil-absorbing cotton 53. The atomizing shell 51 is fixedly connected to the side wall of the oil storage bottle 2, the spiral heating wire 52 is fixedly installed on the inner wall of the atomizing shell 51, the oil-absorbing cotton 53 is arranged in the atomizing shell 51, and the oil-absorbing cotton 53 partially passes through the spiral heating wire 52, and the oil-absorbing cotton 53 also partially passes through the side wall of the oil storage bottle 2 to the inside thereof, and the atomizing shell 51 is also connected to the mixing shell 41.

[0033] The self-cleaning mechanism 6 is arranged inside and connected with the gas cylinder 3. The compressed gas in the gas cylinder 3 is blown into the smoke outlet mechanism 4 through the self-cleaning mechanism 6 to remove dirt. The self-cleaning mechanism 6 is also connected with the smoke outlet mechanism 4 to provide a channel for air inlet and outlet.

[0034] The self-cleaning mechanism 6 includes a guide tube 61, an air pipe 62, a connecting pipe 1 63, a linear motor 64, a bar hole 65, a push rod 66, a movable column 67, a connecting rod 68, a sealing cone 69, an air channel 1 610, an air channel 2 611, a connecting hole 612, a limit spring 613 and a connecting pipe 2 614. The guide tube 61 is arranged in the casing 1 and is located at the lower side of the mixing shell 41. One end of the guide tube 61 is connected to the gas storage bottle 3 through the air pipe 62, and the other end of the guide tube 61 is connected to the gas storage bottle 3 through the connecting hole 612. The through pipe 63 is connected to the outside of the housing 1, the movable column 67 is inserted into the guide tube 61, the linear motor 64 is fixedly installed in the housing 1, the strip hole 65 is opened at the bottom of the guide tube 61, one end of the push rod 66 is fixedly connected to the output end of the linear motor 64, and the other end of the push rod 66 passes through the strip hole 65 and is fixedly connected to the bottom of the movable column 67. The linear motor 64 can drive the movable column 67 to move axially in the guide tube 61 through the push rod 66. One end of the movable column 67 is fixed. One end of the connecting rod 68 is connected, and the other end of the connecting rod 68 is fixedly connected to the sealing cone 69. The sealing cone 69 is inserted into the air pipe 62 for blocking. The other end of the movable column 67 is movably connected to the inner wall of the guide tube 61 through a limit spring 613. An airway 1 610 and an airway 2 611 are opened in the movable column 67. The two openings of the airway 1 610 and the two openings of the airway 2 611 are respectively located at the top of the movable column 67 and the end surface of the movable column 67 close to the connecting pipe 1 63. The connecting hole 612 is opened at the top of the guide tube 61 and is on the movement trajectory of the openings of the air channel 1 610 and the air channel 2 611. The air channel 1 610 is used for air intake, and the air channel 2 611 is used for the discharge of compressed gas and dirt during the self-cleaning process. The guide tube 61 is also connected with the mixing shell 41 through the connecting hole 612. The guide tube 61 is also connected with the bottom wall of the atomizing shell 51 through the connecting tube 2 614. The top of the atomizing shell 51 is connected with the top of the side wall of the mixing shell 41 through the nozzle 7.

[0035] An ultraviolet disinfection lamp 8 is also embedded in the groove at the top of the movable column 67. The bottom wall of the mixing shell 41 is made of transparent material. The ultraviolet disinfection lamp 8 is pneumatically activated during the self-cleaning process to illuminate and disinfect the mixing shell 41, kill bacteria, and improve the cleanliness of the mixing shell 41.

[0036] The oil storage bottle 2 is connected to the connecting pipe 2 614 through the switch valve 9. The switch valve 9 can be a micro solenoid valve or a manual push-type switch valve. The micro solenoid valve is controlled by the circuit board 10. When using a manual push-type switch valve, its switch can be set on the surface of the electronic cigarette. When self-cleaning is performed, the user presses to open the switch valve 9 to release the smoke oil to participate in cleaning. In the early stage of cleaning, the smoke oil is opened to mix with the compressed gas to flush the mixing shell 41 and the atomization shell 51, thereby improving the cleaning efficiency and enhancing the cleaning effect.

[0037] The limit spring 613 is a compression spring, and the second connecting pipe 614 corresponds to the space where the connecting rod 68 is located in the guide pipe 61.

[0038] The inner wall of the connecting hose 47 is provided with a guide strip 12, and the guide strip 12 is spiral. On the one hand, the guide strip 12 can guide the airflow, and on the other hand, when guiding the airflow, it can make the sediment concentrate in the depression formed between adjacent guide strips 12. Compared with the dirt on the guide strip 12, the dirt in the depression is thicker, and pressing the smoke pipe 45 makes it easier for the dirt to fall off after the connecting hose 47 is turned over.

[0039] When the device is working, the smoke tube 45 is pressed to make the positioning magnetic ring 46 separate from the limit ring 1 43 and adsorbed on the limit ring 2 44. At this time, the connecting hose 47 is turned over and enters the mixing shell 41, and the self-cleaning switch is turned on. The linear motor 64 pushes the movable column 67 through the push rod 66 to make the sealing cone 69 separate from the air pipe 62. The airway 2 611 is opposite to the connecting hole 612. The ultraviolet disinfection lamp 8 works to disinfect the ultraviolet rays emitted from the mixing shell 41 through the bottom wall of the mixing shell 41. The compressed gas in the gas storage bottle 3 enters the guide tube 61 through the air pipe 62, and then enters the atomization shell 51 through the connecting pipe 2 614. At the same time, the switch valve 9 is opened to release the smoke oil in the oil storage bottle 2 into the connecting pipe 2 614. The high-speed gas accompanies the smoke oil to the spiral heating wire 52 and the oil-absorbing cotton 53. The mixing shell 41 is flushed by the nozzle 7 and then flushed on the connecting hose 47 under the guidance of the guide strip 12 to flush the inner wall of the mixing shell 41. Then the airflow and dirt are discharged from the casing 1 through the airway 2 611. During the self-cleaning process, the switch valve 9 is only opened in the early stage to release a small amount of smoke oil to assist in self-cleaning. In the later stage, most of the dirt in the mixing shell 41 has been removed. At this time, after closing the switch valve 9, only the compressed gas is used to flush the mixing shell 41 and the connecting hose 47, which can also flush the residual smoke oil and avoid the residual smoke oil affecting the use effect. After completing a single self-cleaning, the self-cleaning switch is turned off, the movable column 67 is reset, the airway 1 610 is opposite to the connecting hole 612, the smoke tube 45 is pulled out, and toilet paper is inserted into the smoke tube 45 to simply clean the inner wall of the smoke tube 45.

[0040] Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electronic cigarette with a self-cleaning structure, characterized in that: It includes a casing, an oil storage bottle, a gas storage bottle, a smoke outlet mechanism, an atomization mechanism and a self-cleaning mechanism; The oil storage bottle is arranged in the housing, and the bottle mouth of the oil storage bottle is located on the side wall of the housing and is provided with a sealing cover for sealing the bottle mouth of the oil storage bottle; The gas storage bottle is arranged in the casing for storing compressed gas, and the bottle mouth of the oil storage bottle is located on the side wall of the casing and is provided with a charging valve; The smoke outlet mechanism is arranged on the casing for smoke circulation; The atomizing mechanism is installed on the oil storage bottle and is connected to the smoke outlet mechanism, and is used to atomize the smoke oil into the smoke outlet mechanism; The self-cleaning mechanism is arranged inside and connected with the gas cylinder. The compressed gas in the gas cylinder is blown into the smoke outlet mechanism through the self-cleaning mechanism to remove dirt. The self-cleaning mechanism is also connected with the smoke outlet mechanism to provide a channel for air inlet and outlet.

2. The electronic cigarette with a self-cleaning structure according to claim 1, characterized in that: The smoke outlet mechanism includes a mixing shell, an adjusting tube, a limiting ring 1, a limiting ring 2, a smoke pipe, a positioning magnetic ring and a connecting hose. The mixing shell is fixedly connected to the inner wall of the casing, the adjusting tube is movably connected to the top wall of the mixing shell, and one end of the adjusting tube away from the mixing shell passes through the top wall of the casing to its outside, the limiting ring 1 is fixedly connected to the top end of the inner wall of the adjusting tube, the limiting ring 2 is fixedly connected to the lower side of the inner wall of the adjusting tube, the smoke pipe is inserted in the adjusting tube, the positioning magnetic ring is fixedly sleeved on the outer wall of the smoke pipe and is between the limiting ring 1 and the limiting ring 2, the top end of the connecting hose is fixedly connected to the bottom end of the smoke pipe, the bottom end of the connecting hose is fixedly connected to the bottom end of the inner wall of the smoke pipe, and pressing the smoke pipe downward can cause the connecting hose to flip and sleeve on the outside of the smoke pipe, the self-cleaning mechanism is connected to the inside of the mixing shell, and the atomizing mechanism is connected to the inside of the mixing shell.

3. The electronic cigarette with a self-cleaning structure according to claim 2, characterized in that: The atomization mechanism includes an atomization shell, a spiral heating wire and oil-absorbing cotton. The atomization shell is fixedly connected to the side wall of the oil storage bottle, the spiral heating wire is fixedly installed on the inner wall of the atomization shell, the oil-absorbing cotton is arranged in the atomization shell, and the oil-absorbing cotton partially passes through the spiral heating wire, and the oil-absorbing cotton also partially passes through the side wall of the oil storage bottle to the inside thereof, and the atomization shell is also connected to the mixing shell.

4. The electronic cigarette with a self-cleaning structure according to claim 3, characterized in that: The self-cleaning mechanism includes a guide tube, an air pipe, a connecting tube 1, a linear motor, a strip hole, a push rod, a movable column, a connecting rod, a sealing cone, an airway 1, an airway 2, a connecting hole, a limit spring and a connecting tube 2. The guide tube is arranged in the casing and is on the lower side of the mixing shell. One end of the guide tube is connected with the inside of the gas storage bottle through the air pipe, and the other end of the guide tube is connected with the outside of the casing through the connecting tube 1. The movable column is inserted into the guide tube, and the linear motor is fixedly installed in the casing. The strip hole is provided at the bottom of the guide tube, one end of the push rod is fixedly connected with the output end of the linear motor, and the other end of the push rod is fixedly connected with the bottom of the movable column through the strip hole. The linear motor can drive the movable column to extend in the guide tube through the push rod. Its axial movement, one end of the movable column is fixedly connected to one end of the connecting rod, the other end of the connecting rod is fixedly connected to the sealing cone, the sealing cone is inserted in the air pipe for blocking, the other end of the movable column is movably connected to the inner wall of the guide tube through a limit spring, airway one and airway two are provided in the movable column, the two openings of airway one and the two openings of airway two are respectively located at the top of the movable column and the end surface of the movable column close to the connecting tube one, the connecting hole is provided at the top of the guide tube and is located on the movement trajectory of the openings of airway one and airway two, and the guide tube is also connected with the inside of the mixing shell through the connecting hole, the guide tube is also connected with the bottom wall of the atomizing shell through the connecting tube two, and the top of the atomizing shell is connected with the top end of the side wall of the mixing shell through the nozzle.

5. The electronic cigarette with a self-cleaning structure according to claim 4, characterized in that: An ultraviolet disinfection lamp is also embedded in the groove on the top of the movable column, and the bottom wall of the mixing shell is made of transparent material.

6. The electronic cigarette with a self-cleaning structure according to claim 4, characterized in that: The oil storage bottle is connected with the second connecting pipe through a switch valve.

7. The electronic cigarette with a self-cleaning structure according to claim 1, characterized in that: A circuit board and a power supply are also arranged in the casing for controlling and supplying power to the electronic components.

8. The electronic cigarette with a self-cleaning structure according to claim 4, characterized in that: The limit spring is a compression spring, and the second connecting pipe corresponds to the space where the connecting rod is located in the guide pipe.

9. The electronic cigarette with a self-cleaning structure according to claim 2, characterized in that: The inner wall of the connecting hose is provided with a guide strip, and the guide strip is spiral-shaped.

Images