Candle pop and aromatherapy device

Abstract

The application relates to a candle pop. The candle pop comprises a shell, a wax base, a wick and a driving mechanism. The shell is provided with a containing cavity. The wax base is arranged in the containing cavity. The wick is arranged in the wax base and is used for burning the wax base. The wick has a burning section exposed outside the wax base and used for burning. The driving mechanism is arranged on the shell and drives the wax base to slide in the containing cavity, so that the distance between the free end of the burning section and the open mouth of the containing cavity and the wax base is within a set range. Thus, the position of the free end of the burning section in the containing cavity is basically kept constant, so that the position of the flame in the containing cavity is basically kept constant, that is, the height of the flame is basically kept unchanged. In the case that the height of the flame is basically kept unchanged, the user can observe the flame through a basically constant visual angle without frequently changing the visual angle to adapt to the flame with a great change in height. Thus, the flame generated by the burning section has a reasonable observation visual angle, so that the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of candle fragrance technology, and in particular to a candle cartridge and a fragrance device containing the candle cartridge. Background Technology

[0002] Aromatherapy candle cartridges consist of a wax base and a wick. The wax base contains aromatic substances. When the wax base burns through the wick, the aromatic substances evaporate under the heat. The evaporated aromatic molecules diffuse into the external space, thus purifying the air, improving mood, and creating ambiance. However, with traditional candle cartridges, the flame from the wick can obstruct the user's field of vision, thereby affecting the user experience. Utility Model Content

[0003] One of the technical problems addressed by this application is how to ensure that the flame produced by the candle wick has a reasonable viewing angle.

[0004] A candle bomb, comprising:

[0005] The outer casing has a receiving cavity;

[0006] Wax base, wherein the wax base is disposed within the accommodating cavity;

[0007] A candle wick, wherein the wick is inserted into the wax base and used to burn the wax base, the wick having a burning section exposed outside the wax base for combustion, the distance between the free end of the burning section and the opening of the receiving cavity being within a predetermined range; and

[0008] A driving mechanism is disposed on the housing, which drives the wax base to slide within the accommodating cavity so that the distance between the free end of the combustion section and the opening of the accommodating cavity and the wax base is within a set range.

[0009] In one embodiment, the wick is made of a porous ceramic material.

[0010] In one embodiment, the device further includes a support platform located within the accommodating cavity, on which the wax base is supported. Both the support platform and the wax base can slide relative to the inner wall of the accommodating cavity. The wax base has a melting surface located away from the support platform. The driving mechanism drives the support platform to slide so that the distance between the free end of the combustion section and the melting surface is within a set range.

[0011] In one embodiment, the drive mechanism includes a drive shaft for driving by a motor, the drive shaft being a sliding shaft connected to the motor and fixedly connected to the support platform; or the drive shaft being a lead screw shaft connected to the rotation shaft of the motor and threadedly connected to the support platform.

[0012] In one embodiment, the drive mechanism includes a drive elastic element that abuts between the housing and the support platform. The drive elastic element is capable of elongation when energized and maintains a constant length when de-energized.

[0013] In one embodiment, the elongation of the driving elastic element is greater than or equal to the thickness of the wax base; or the driving elastic element is made of titanium-nickel alloy; or the phase transition temperature of the driving elastic element is 30°C to 90°C; or the resistance of the driving elastic element is 0.1Ω to 5Ω.

[0014] In one embodiment, a sensor is also included located within the accommodating cavity and connected to the outer shell or the wick. The sensor and the free end of the wick exposed in the burning section are maintained at a set distance along the axial direction of the wick. When the wax base is consumed and the sensor is gradually exposed from the melted surface, the sensor feeds back a signal, and the wax base moves to conceal the sensor within the wax base.

[0015] In one embodiment, at least one of the following schemes is also included:

[0016] The sensor is mounted on the candle wick;

[0017] The sensor is a temperature switch, a hot surface resistor, or a thermocouple.

[0018] In one embodiment, the device further includes a support tube and a seal, the support tube being inserted into the wax base and connected to the outer shell, the wax base being slidably connected to the support tube, the wick being inserted into the support tube, and the seal abutting between the support tube and the wick.

[0019] An aromatherapy device includes a main unit and a candle cartridge as described above, wherein the housing is connected to the main unit.

[0020] One technical advantage of one embodiment of this application is that, given that the driving mechanism drives the wax base to slide within the accommodating cavity, the distance between the free end of the combustion section and the opening of the accommodating cavity and the wax base is within a set range. This ensures that the position of the free end of the combustion section within the accommodating cavity remains substantially constant, thereby keeping the position of the flame within the accommodating cavity substantially constant, i.e., the flame height remains substantially constant. With the flame height remaining substantially constant, the user can observe the flame from a roughly constant viewing angle without frequently changing the viewing angle to adapt to flames with drastically varying heights. This provides a reasonable viewing angle for the flame produced by the combustion section, thereby improving the user experience. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an aromatherapy device provided in one embodiment.

[0022] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the aromatherapy device shown.

[0023] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the aromatherapy device shown.

[0024] Figure 4a This is a partial planar cross-sectional view of an aromatherapy device provided in one embodiment when the support platform is at its lowest position.

[0025] Figure 4b for Figure 4a The diagram shows a partial planar cross-sectional view of the aromatherapy device when the support platform is in the middle position.

[0026] Figure 4c for Figure 4a The diagram shows a partial planar cross-sectional view of the aromatherapy device when the support platform is at its highest position.

[0027] Reference numerals: Aromatherapy device 10, main unit 11, housing 101, open mouth 101a, control mechanism 102, candle cartridge 12, outer shell 110, receiving cavity 111, wax base 120, melting surface 121, candle wick 130, combustion section 131, free end 1311, support platform 210, drive mechanism 220, elastic element 221, sensor 300, support tube 410, sealing element 420. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figure 1 , Figure 2 and Figure 3 An aromatherapy device 10 provided in one embodiment of this application includes a main unit 11 and a candle cartridge 12. The candle cartridge 12 is used in conjunction with the main unit 11 and can be detachably or non-detachably connected to the main unit 11. The main unit 11 includes a housing 101, a control mechanism 102, and a power supply; the control mechanism 102 and the power supply are electrically connected to each other and are both located within the housing 101. The candle cartridge 12 includes a shell 110, a wax base 120, and a wick 130. The shell 110 has a receiving cavity 111, within which the wax base 120 is housed. The wax base 120 contains components such as candle and aromatherapy substances. The wick 130 has a burning section 131, which is exposed outside the wax base 120. When the combustion section 131 is burning, the flame generated by the combustion section 131 will melt the wax base 120. The melted liquid wax base 120 will be drawn into the combustion section 131 for combustion, thus realizing the combustion of the wax base 120 by the combustion section 131, and finally causing the aroma substances in the wax base 120 to evaporate.

[0035] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the housing 101 of the main unit 11 has an opening 101a, and the outer shell 110 is at least partially housed in the opening 101a. By providing the opening 101a, the candle bomb 12 can be housed and positioned effectively.

[0036] See Figure 1 ,Figure 2 and Figure 3 The distance H between the free end 1311 of the combustion section 131 and the opening of the receiving cavity 111 is within a set range. This ensures that the position of the free end 1311 of the combustion section 131 within the receiving cavity 111 remains essentially constant. For example, the fluctuation range of the position of the free end 1311 of the combustion section 131 within the receiving cavity 111 can be 1mm to 5mm, thus ensuring that the position of the flame within the receiving cavity 111 remains essentially constant, i.e., the flame height remains essentially constant. With the flame height remaining essentially constant, the user can observe the flame from a roughly constant viewing angle without frequently changing the viewing angle to adapt to flames with drastic height changes. This provides a reasonable viewing angle for the flame produced by the combustion section 131, thereby improving the user experience. Furthermore, the distance between the free end 1311 of the combustion section 131 and the opening of the receiving cavity 111 can remain completely constant, i.e., the position of the free end 1311 of the combustion section 131 within the receiving cavity 111 remains completely constant. This ensures that the flame height remains completely constant, further improving the user experience.

[0037] In some embodiments, the wick 130 can be made of a porous ceramic material. The porous ceramic wick 130 has numerous micropores inside, giving it a certain porosity. The pore size of the porous ceramic material can be from 10 μm to 100 μm, and the porosity can be from 10% to 60%. Therefore, the wick 130 will generate capillary action, allowing the liquid formed by the melting of the wax base 120 to flow into the wick 130, thus burning the liquid wax base 120 and evaporating the aromatherapy substances. Furthermore, during the combustion of the liquid wax base 120, the wick 130 will not burn and will not be consumed; that is, the length of the wick 130 remains constant. This avoids carbon buildup on the wick 130, preventing carbon buildup from reacting chemically with the wax base 120 during combustion, thereby improving the utilization rate of the wax base 120 and preventing the production of harmful substances from the carbon buildup during the chemical reaction, thus improving the environmental friendliness and safety of the aromatherapy device 10. Of course, in other embodiments, during the combustion of the liquid wax base 120, the wick 130 will be consumed, causing the length of the wick 130 to become shorter. In this case, the wick 130 can be made of cotton, fiber, or wood.

[0038] See Figure 3 , Figures 4a to 4cIn some embodiments, the candle cartridge 12 further includes a support platform 210 and a drive mechanism 220, which are located within a receiving cavity 111. Both the support platform 210 and the wax base 120 are slidably connected to the outer shell 110. The wax base 120 is supported on the support platform 210 and has a melting surface 121 located away from the support platform 210. The wax base 120 on this melting surface 121 melts to form a liquid state, and a burning section 131 protrudes from the melting surface 121. The drive mechanism 220 drives the support platform 210 to slide, ensuring that the protruding length of the wick 130 relative to the melting surface 121 is within a set range, and also ensuring that the distance between the free end 1311 of the burning section 131 and the melting surface 121 is within a set range.

[0039] If the wick 130 is made of porous ceramic material and the wax base 120 cannot rise, the burning section 131 and the entire wick 130 will not burn or be consumed, keeping the length of the wick 130 constant. As the wax base 120 continues to burn and be consumed, its thickness decreases, and the melting surface 121 continues to descend. Since the wick 130 has limited liquid absorption capacity, there will not be enough liquid wax base 120 near the free end 1311 of the burning section 131, causing the flame height to decrease or even extinguish. If the wick 130 is made of cotton, fiber, or wood and the wax base 120 cannot rise, as the wax base 120 continues to burn and be consumed, its thickness decreases, and the melting surface 121 continues to descend. The wick 130 also melts and descends synchronously, causing the flame height to continuously decrease.

[0040] Regarding the candle cartridge 12 in the above embodiment, when the wick 130 is made of porous ceramic material, given that the drive mechanism 220 drives the support platform 210 to slide, when the melting surface 121 of the wax base 120 is lower than a set value, the drive mechanism 220 will drive the support platform 210 and the wax base 120 to move upward, thereby causing the melting surface 121 to move upward, ensuring that the distance between the free end 1311 of the combustion section 131 and the melting surface 121 is within the set range. This ensures that the free end 1311 of the combustion section 131 can absorb enough liquid wax base 120, thereby ensuring that the position of the flame in the receiving cavity 111 remains constant, that is, the height of the flame remains unchanged. With the flame height remaining constant, the user can observe the flame from a constant viewing angle without frequently changing the viewing angle to adapt to the continuously decreasing flame height, thus improving the user experience.

[0041] In other embodiments, for example, the wick 130 can be made of porous ceramic material to ensure that the free end 1311 of the combustion section 131 remains constant within the accommodating cavity 111. In this case, the support platform 210 can be omitted to drive the wax base 120 upwards. As the wax base 120 is gradually consumed, the melting surface 121 gradually descends. To ensure that the free end 1311 of the combustion section 131 can absorb enough liquid wax base 120 to maintain a constant flame height, a liquid-absorbing element can be provided between the wax base 120 and the free end 1311 of the combustion section 131. The liquid-absorbing element's conductivity over the liquid wax base 120 is much greater than that of the wick 130. Therefore, even as the melting surface 121 gradually descends, the liquid-absorbing element can promptly transfer the liquid wax base 120 on the melting surface 121 to the free end 1311 of the combustion section 131, thereby ensuring a constant flame height. For example, if the wick 130 is a cotton, fiber, or wood wick that shortens during combustion, a support platform 210 can be provided to drive the wax base 120 upwards, and a power mechanism can be provided to drive the wick 130 upwards relative to the wax base 120. As the melting surface 121 gradually descends and the wax base 120 is gradually consumed, the wax base 120 can move upwards relative to the outer shell 110, and the wick 130 can also move upwards relative to the wax base 120. This ensures that the free end 1311 of the burning section 131 remains constant within the receiving cavity 111, thereby keeping the flame height within the receiving cavity 111 constant.

[0042] In some embodiments, the drive mechanism 220 includes a drive shaft, and the main unit 11 may further include a motor disposed within the housing 101. The drive shaft is connected to the support platform 210, and the drive shaft and motor are detachably or non-detachably connected. When the motor operates, the drive shaft can cause the support platform 210 to drive the wax base 120 to slide upward. For example, the drive shaft is a sliding shaft, which is fixedly connected to the support platform 210, allowing the sliding shaft and the support platform 210 to slide synchronously. The sliding shaft is connected to the output shaft of the motor. When the output shaft of the motor moves upward in the vertical direction, it will cause the sliding shaft to move upward, thereby causing the sliding shaft to drive the support platform 210 and the wax base 120 to move upward synchronously. For example, the drive shaft is a lead screw shaft, which is threadedly connected to the support platform 210 and connected to the output shaft of the motor. When the output shaft of the motor rotates, it causes the lead screw shaft to rotate. This rotation of the lead screw shaft is converted into sliding of the support platform 210 relative to the outer casing 110, thereby causing the lead screw shaft to drive the support platform 210 and the candle wick 130 to rise. It can be understood that placing the motor inside the main unit 11 avoids the motor being discarded as a disposable consumable along with the candle cartridge 12, thus reducing the operating cost of the aromatherapy device 10.

[0043] See Figure 3 ,Figures 4a to 4c In some embodiments, the drive mechanism 220 includes a drive elastic element 221, which is electrically connected to a power source within the main unit 11. The drive elastic element 221 can be a spring or a memory elastic element, meaning it is made of a memory alloy material, such as a titanium-nickel alloy. When energized, the drive elastic element 221 generates heat and elongates, maintaining a constant elongation after power is cut off. The drive elastic element 221 abuts against the housing 110 and the support platform 210. Therefore, the elongation of the drive elastic element 221 can push the support platform 210 and the wax base 120 to a designated position. The elongation of the drive elastic element 221 is greater than or equal to the thickness of the wax base 120, allowing sufficient stroke to drive the support platform 210 so that the wax base 120 is completely burned.

[0044] The phase transition temperature of the driving elastic element 221 can be from 30℃ to 90℃. When the temperature of the driving elastic element 221 reaches this phase transition temperature after being energized, the driving elastic element 221 will undergo elongation deformation. The resistance of the driving elastic element 221 can be from 0.1Ω to 5Ω. When the energization is stopped, the driving elastic element 221 will stop elongating and will not automatically return to its initial state. Under the condition of no external force or insufficient external force, the driving elastic element 221 will maintain a constant elongation length. Therefore, after the driving elastic element 221 deforms after being energized, it will push the wax base 120 upward through the support platform 210.

[0045] See Figure 3 In some embodiments, the candle cartridge 12 further includes a sensor 300 located within the receiving cavity 111. The sensor 300 and the free end 1311 of the burning section 131 are maintained at a set distance along the axial direction of the wick 130. The sensor 300 can be directly mounted on the wick 130 or the outer shell 110. When the wax base 120 is consumed, causing the sensor 300 to be gradually exposed from the melted surface 121, the sensor 300 sends a feedback signal. The drive mechanism 220 then drives the support platform 210 and the wax base 120 to move upwards based on this feedback signal. When the wax base 120 moves upwards to conceal the sensor 300 within the wax base 120, the drive mechanism 220 stops moving. In fact, the sensor 300 can detect the height of the melting surface 121. When the melting surface 121 is lower than a certain value, the sensor 300 will generate a feedback signal. The drive mechanism 220 will drive the support platform 210 and the wax base 120 to move upward according to the feedback signal, so as to ensure that the protrusion length of the wick 130 relative to the melting surface 121 is within the set range, and also ensure that the distance between the free end 1311 of the burning section 131 and the melting surface 121 is within the set range.

[0046] For example, sensor 300 can be a temperature switch. The temperature switch uses a bimetallic strip as the temperature sensing element. When the temperature switch is below the melting surface 121, the temperature of the temperature switch is relatively low, and the contacts are in a closed (open) state. As the wax base 120 is consumed, the temperature switch is gradually exposed from the melting surface 121. At this time, the temperature of the temperature switch gradually increases. When it rises to a critical value, the bimetallic strip generates internal stress due to heat and moves rapidly, causing the contacts to be in an open (closed-loop) state. Thus, the control mechanism 102 in the host 11 sends a feedback signal. The control mechanism 102 causes the drive mechanism 220 to drive the wax base 120 upward, the melting surface 121 gradually rises, and the temperature switch gradually hides inside the wax base 120, so that the melting surface 121 is once again above the temperature switch, and the temperature of the temperature switch gradually decreases. When the temperature drops to a critical value, the contacts are in a closed (open) state, and the drive mechanism 220 stops moving.

[0047] In other embodiments, the sensor 300 may not be mounted on the wick 130, but the sensor 300 and the wick 130 are maintained at a predetermined distance. The sensor 300 can also be a thermistor or a thermocouple, etc. When the sensor 300 is a thermistor, the thermistor changes resistance when heated, and the control mechanism 102 of the host 11 determines the height of the melt surface 121 by detecting the resistance, thereby controlling the movement of the drive mechanism 220. When the sensor 300 is a thermocouple, the thermocouple is used to detect temperature, and the control mechanism 102 controls the movement of the drive mechanism 220 based on the temperature information.

[0048] See Figure 3 In some embodiments, the candle cartridge 12 further includes a support tube 410 and a seal 420. The support tube 410 surrounds the wick 130, with the wick 130 passing through it. The seal 420 abuts against the support tube 410 and the wick 130. The support platform 210 is slidably sleeved on the outside of the support tube 410. By providing the support tube 410, direct contact between the wax base 120 and the wick 130 can be avoided. During the upward movement of the wax base 120 and the support platform 210, the frictional resistance between the wax base 120 and the support tube 410 can be reduced, preventing damage to the wick 130 from the wax base 120 and the support platform 210. By providing the seal 420, liquid wax base 120 can be prevented from entering the gap between the support tube 410 and the wick 130, thus preventing liquid wax base 120 from entering this gap.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A candle-shaped cartridge, characterized in that, include: The outer casing has a receiving cavity; Wax base, wherein the wax base is disposed within the accommodating cavity; A candle wick, wherein the wick is inserted into the wax base and used for burning the wax base, the wick having a burning section exposed outside the wax base for combustion; and A driving mechanism is disposed on the housing, which drives the wax base to slide within the accommodating cavity so that the distance between the free end of the combustion section and the opening of the accommodating cavity and the wax base is within a set range.

2. The candle bomb according to claim 1, characterized in that, The candle wick is made of porous ceramic material.

3. The candle bomb according to claim 1, characterized in that, It also includes a support platform located within the accommodating cavity, on which the wax base is supported. Both the support platform and the wax base can slide relative to the inner wall of the accommodating cavity. The wax base has a melting surface located away from the support platform. The driving mechanism drives the support platform to slide so that the distance between the free end of the combustion section and the melting surface is within a set range.

4. The candle bomb according to claim 3, characterized in that, The drive mechanism includes a drive shaft for driving by a motor, the drive shaft being a sliding shaft connected to the motor and fixedly connected to the support platform; or the drive shaft being a lead screw shaft connected to the rotating shaft of the motor and threadedly connected to the support platform.

5. The candle bomb according to claim 3, characterized in that, The driving mechanism includes a driving elastic element that abuts between the housing and the support platform. The driving elastic element can elongate when energized and maintain a constant length when de-energized.

6. The candle bomb according to claim 5, characterized in that, The elongation of the driving elastic element is greater than or equal to the thickness of the wax base; or the driving elastic element is made of titanium-nickel alloy; or the phase transition temperature of the driving elastic element is 30°C to 90°C; or the resistance of the driving elastic element is 0.1Ω to 5Ω.

7. The candle bomb according to claim 3, characterized in that, It also includes a sensor located within the accommodating cavity and connected to the outer shell or the wick. The sensor and the wick are kept at a set distance along the axial direction of the wick at the free end exposed in the burning section. When the wax base is consumed, exposing the sensor from the melted surface, the sensor sends a feedback signal, and the wax base moves to conceal the sensor within the wax base.

8. The candle bomb according to claim 7, characterized in that, It also includes at least one of the following options: The sensor is mounted on the candle wick; The sensor is a temperature switch, a hot surface resistor, or a thermocouple.

9. The candle bomb according to claim 1, characterized in that, It also includes a support tube and a seal, the support tube being inserted into the wax base and connected to the outer shell, the wax base being slidably connected to the support tube, the wick being inserted into the support tube, and the seal abutting between the support tube and the wick.

10. An aromatherapy device, characterized in that, It includes a main unit and a candle cartridge according to any one of claims 1 to 9, wherein the outer casing is connected to the main unit.

Images