Multifunctional hairdressing rod

Abstract

The utility model discloses a multifunctional hairdressing stick which comprises an upper portion unit, a lower portion unit and a tail portion unit which are sequentially arranged from top to bottom, and the upper portion unit and the lower portion unit are vertically communicated and rotatably connected. When the upper unit rotates by a certain angle, the upper unit and the lower unit are in a bent state. The multifunctional hairdressing rod designed by the utility model can be butted with hairdressing accessories for hairdressing in a direct connection state; in the bending state, the hair dryer can be changed into a hair dryer for blowing hair; the rotating angle during bending can be limited through the limiting structure, so that the wire body winding damage caused by multi-circle rotation is avoided; and unlocking and locking can be achieved by arranging a pull button, switching between direct connection and bending is facilitated, the functions are comprehensive, and the device is suitable for popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric hair dryer, specifically relates to a multifunctional hair styling rod. BACKGROUND

[0002] With the improvement of life quality, people's aesthetic requirements are improved accordingly. The hair styling rod is a hair care auxiliary appliance frequently used in people's daily life, and is mainly used for helping people to make various hair styles.

[0003] The existing hair styling rod has single function, is only used for hair shaping after being matched with hair accessories, and most of them do not have a hair drying function. Even if the hair styling rod has a hair drying function, it is not very convenient to use due to the limitation of the rod structure itself, and consumers still choose hair dryers when blowing hair. Therefore, a multifunctional hair styling rod is designed to solve the above problems.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the utility model, and for the convenience of understanding by the person skilled in the art. The above technical scheme cannot be considered as known by the person skilled in the art only because it is described in the background art part of the utility model. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a multifunctional hair styling rod.

[0006] In order to achieve the above purpose and other related purposes, the technical scheme provided by the utility model is: a multifunctional hair styling rod, comprising an upper unit, a lower unit and a tail unit arranged in sequence from top to bottom, the upper unit is in communication with the lower unit and rotatably connected therebetween; when the upper unit is turned through a certain angle, the upper unit and the lower unit are in a bent state.

[0007] Further, the upper unit comprises an upper outer cylinder, an upper inner cylinder is arranged in the upper outer cylinder, a heating body and a protective net are arranged in the upper inner cylinder, and the protective net is located on the outer side of the heating body; the lower unit comprises a lower outer cylinder, a lower inner cylinder is arranged in the lower outer cylinder, a motor, a rectifier and a control mainboard are arranged in the lower inner cylinder from top to bottom; the tail unit comprises an outer net cylinder, an air inlet cylinder is arranged in the outer net cylinder, and a power cord is arranged at the end of the air inlet cylinder. In this scheme, the hair styling rod drives the air blowing device through the motor, realizes air inlet through the air inlet cylinder of the tail, and blows out the cold air as hot air through the protective net after being heated by the heating body.

[0008] Further, the side of the lower outer cylinder is provided with a blowing button, a heating button and a power button, the blowing button and the heating button are electrically connected with a PCB, the power button is electrically connected with the control mainboard, and the PCB is arranged between the lower outer cylinder and the lower inner cylinder. In the scheme, the control buttons are arranged on the side of the lower outer cylinder, the operation is convenient, the blowing button and the heating button are arranged on the PCB, and the circuit installation is more convenient.

[0009] Further, the upper end of the upper outer cylinder is provided with an upper mounting ring, the outer wall of the upper outer cylinder body is provided with an upper dismounting button which can move up and down, the inner wall of the upper mounting ring is provided with a plurality of clamping protrusions in the circumferential direction, one side of the clamping protrusions is provided with a movable baffle, and the baffle is connected with the upper dismounting button. In the scheme, when the upper unit and the lower unit are directly connected, the docking hairdressing accessories can be arranged on the upper mounting ring to be used as a hairdressing rod, when the baffle is driven to move up by the upper dismounting button, the baffle clamps the docking accessories, when the docking accessories need to be dismounted, the baffle is driven to move down by the upper dismounting button, and the docking accessories are rotated out.

[0010] Further, the upper unit and the lower unit are connected through a bending structure to realize bending movement, the bending structure comprises an upper docking cylinder below the upper inner cylinder and the lower inner cylinder; the lower end of the upper docking cylinder is provided with an upper docking disc which is arranged obliquely relative to the central axis of the upper inner cylinder, the middle part of the upper docking disc is provided with an upper connecting hole, and the two sides of the upper connecting hole are respectively provided with a first clamping groove and a second clamping groove; the upper end of the lower inner cylinder is provided with a lower docking disc which is arranged obliquely relative to the central axis of the lower inner cylinder, the middle part of the lower docking disc is provided with a lower connecting hole, a convex ring is arranged at the lower connecting hole, the outer diameter of the convex ring is greater than the diameter of the upper connecting hole, the inner diameter of the convex ring is less than the diameter of the upper connecting hole, the convex ring is clamped into the upper connecting hole and can be arranged to rotate in the upper connecting hole; the side of the lower outer cylinder is provided with a sliding groove, a lower dismounting button which can move up and down is arranged in the sliding groove, the lower dismounting button is connected with a clamping plate, a return spring is arranged between the clamping plate and the sliding groove; the positions of the clamping plate, the first clamping groove and the second clamping groove are correspondingly arranged, when the upper unit and the lower unit are directly connected, the clamping plate is clamped into the second clamping groove, and when the upper unit and the lower unit are in the bending state, the clamping plate is clamped into the first clamping groove.

[0011] Further, the bending structure is provided with a limiting structure, the limiting structure comprises a limiting block arranged on the convex ring and a ring groove arranged in the upper butt joint cylinder, a step is arranged in the ring groove, the step accounts for half of the ring groove, and the limiting block is arranged correspondingly with the ring groove and movably arranged in the ring groove.In this scheme, the rotating area is limited to half a circle through the sliding of the limiting block in the ring groove, the limiting block can only move in the half ring groove, and the limiting effect is achieved, and the wire body is prevented from being damaged due to winding for multiple turns.

[0012] Further, the angle between the upper unit and the lower unit after being bent is 90°, and the inclination angles of the upper butt joint disc and the lower butt joint disc are both 45°.In this scheme, the upper unit and the lower unit become a 90° angle after being bent, compared with the traditional hair dryer with an angle less than 90°, the hair dryer is more comfortable to use and has a better experience.

[0013] Further, the upper butt joint cylinder and the lower inner cylinder are each formed by splicing two half shells, the lower end of the upper butt joint cylinder is clamped in an upper decorative ring, and the upper end of the lower inner cylinder is clamped in a lower decorative ring.In this scheme, the upper butt joint cylinder and the lower inner cylinder both adopt a splicing structure, which is convenient to disassemble and assemble and facilitates the installation of internal structures, and the decorative ring can stabilize the structure.

[0014] Further, the outer part of the convex ring is provided with a sealing ring.In this scheme, the sealing ring ensures the sealing property of the bending structure, prevents air leakage, and guarantees product quality.

[0015] Further, the structure of the heating body comprises an external cylinder and a plurality of heating plates arranged in the cylinder, and the heating plates are uniformly arranged around the central axis of the cylinder.In this scheme, the structure of the heating body is convenient to install and ventilate.

[0016] Thanks to the application of the above technical scheme, the hair dryer has the following beneficial effects compared with the prior art:

[0017] The multifunctional hair styling rod can be connected to hair styling accessories for hair styling in a straight connection state, and can become a hair dryer for blow-drying in a bent state, the rotating angle during bending can be limited through the limiting structure, so that the wire body is prevented from being damaged due to winding for multiple turns, the unlocking and locking can be realized through the setting of the pulling button, the switching between the straight connection and the bending is facilitated, the functions are comprehensive, and the multifunctional hair styling rod is suitable for promotion. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the hair dryer of the utility model (in a straight connection state);

[0019] Figure 2The utility model discloses a hairdressing stick section structure schematic diagram (directly connected state) for the utility model discloses a hairdressing stick section structure schematic diagram (directly connected state).

[0020] Figure 3 The utility model discloses a hairdressing stick internal structure schematic diagram (directly connected state) for the utility model discloses a hairdressing stick internal structure schematic diagram (directly connected state).

[0021] Figure 4 The utility model discloses an upper butt joint cylinder and related structure schematic diagram for the utility model discloses an upper butt joint cylinder and related structure schematic diagram.

[0022] Figure 5 The utility model discloses a lower inner cylinder and related structure schematic diagram for the utility model discloses a lower inner cylinder and related structure schematic diagram.

[0023] Figure 6 The utility model discloses a heating body structure schematic diagram for the utility model discloses a heating body structure schematic diagram.

[0024] Figure 7 The utility model discloses a hairdressing stick three -dimensional structure schematic diagram (bending state) for the utility model discloses a hairdressing stick three -dimensional structure schematic diagram (bending state).

[0025] Figure 8 The utility model discloses a hairdressing stick part structure section structure schematic diagram (bending state) for the utility model discloses a hairdressing stick part structure section structure schematic diagram (bending state).

[0026] In the above drawing, 1, upper outer cylinder;2, upper inner cylinder;3, heating body;301, cylinder body;302, heating plate;4, protective net;5, lower outer cylinder;6, lower inner cylinder;7, motor;8, rectifier;9, control mainboard;10, outer net cylinder;11, air inlet cylinder;12, power cord;13, blow button;14, heating button;15, power button;16, PCB board;17, upper mounting ring;18, upper dismounting button;19, clamping convex;20, baffle;21, upper butt joint cylinder;22, upper butt joint disc;23, upper connecting hole;24, first clamping slot;25, second clamping slot;26, lower butt joint disc;27, lower connecting hole;28, convex ring;29, sliding slot;30, lower dismounting button;31, clamping plate;32, limiting block;33, ring groove;34, step;35, upper decorative ring;36, lower decorative ring;37, sealing ring. DETAILED DESCRIPTION

[0027] The following specific embodiments illustrate the embodiments of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in the specification.

[0028] It should be understood that, in the description of the utility model, it needs to be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0031] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0032] Embodiment:

[0033] Reference is made to the drawings Figure 1As shown in the drawings, the present embodiment provides a multifunctional hair styling rod, which comprises an upper unit, a lower unit and a tail unit arranged in sequence from top to bottom, the upper unit is in communication with the lower unit and the two are rotatably connected. Figure 7 As shown in the drawings, when the upper unit is turned through a certain angle, the upper unit and the lower unit are in a bent state. Figure 2 and Figure 3 As shown in the drawings, the upper unit comprises an upper outer cylinder 1, the inside of the upper outer cylinder 1 is provided with an upper inner cylinder 2, the inside of the upper inner cylinder 2 is provided with a heating body 3 and a protective screen 4, the protective screen 4 is located on the outside of the heating body 3; the lower unit comprises a lower outer cylinder 5, the inside of the lower outer cylinder 5 is provided with a lower inner cylinder 6, the lower inner cylinder 6 is sequentially provided with a motor 7, a rectifier 8 and a control mainboard 9 from top to bottom; the tail unit comprises an outer screen cylinder 10, the inside of the outer screen cylinder 10 is provided with an air inlet cylinder 11, the end of the air inlet cylinder 11 is provided with a power cord 12. The hair styling rod drives the air blowing device by the motor 7, realizes air inlet through the air inlet cylinder 11 of the tail, and blows out the cold air as hot air from the protective screen 4 through the heating body 3.

[0034] As shown in the drawings, Figure 2 and Figure 3 As shown in the drawings, the side of the lower outer cylinder 5 is provided with a blowing button 13, a heating button 14 and a power button 15, the blowing button 13 and the heating button 14 are electrically connected with a PCB board 16, the power button 15 is electrically connected with the control mainboard 9, and the PCB board 16 is arranged between the lower outer cylinder 5 and the lower inner cylinder 6. The control button is arranged on the side of the lower outer cylinder 5, which is convenient to operate, and the blowing button 13 and the heating button 14 are separately arranged on the PCB board 16, which is more convenient for circuit installation.

[0035] As shown in the drawings, Figure 3 As shown in the drawings, the upper end of the upper outer cylinder 1 is provided with an upper mounting ring 17, the outer wall of the upper outer cylinder 1 body is provided with an upper dismounting button 18 which can move up and down, the inner wall of the upper mounting ring 17 is provided with a plurality of clamping protrusions 19 in the circumferential direction, one side of the clamping protrusions 19 is provided with a movable baffle 20, and the baffle 20 is connected with the upper dismounting button 18. When the upper unit and the lower unit are directly connected, the docking hair styling accessory can be arranged in the position of the upper mounting ring 17 through the clamping protrusions 19 to be used as a hair styling rod, when the upper dismounting button 18 drives the baffle 20 to move upwards, the baffle 20 clamps the docking accessory, when it is needed to dismount the docking accessory, the baffle 20 is driven by the upper dismounting button 18 to move downwards to rotate out the docking accessory.

[0036] As shown in the drawings, Figure 4 , the drawings, Figure 5 and Figure 8As shown, the upper unit and the lower unit are folded by the folding structure, which comprises the upper butt cylinder 21 below the upper inner cylinder 2 and the lower inner cylinder 6. The lower end of the upper butt cylinder 21 is provided with an upper butt disc 22, which is inclined relative to the central axis of the upper inner cylinder 2. The middle part of the upper butt disc 22 is provided with an upper connecting hole 23, and the two sides of the upper connecting hole 23 are respectively provided with a first clamping groove 24 and a second clamping groove 25. The upper end of the lower inner cylinder 6 is provided with a lower butt disc 26, which is inclined relative to the central axis of the lower inner cylinder 6. The middle part of the lower butt disc 26 is provided with a lower connecting hole 27, and a convex ring 28 is arranged at the lower connecting hole 27. The outer diameter of the convex ring 28 is greater than the diameter of the upper connecting hole 23, and the inner diameter of the convex ring 28 is less than the diameter of the upper connecting hole 23. The convex ring 28 is clamped into the upper connecting hole 23 and can be rotatably arranged in the upper connecting hole 23. The side of the lower outer cylinder 5 is provided with a sliding groove 29, and the sliding groove 29 is provided with a lower disassembly button 30 which can move up and down. The lower disassembly button 30 is connected with a clamping plate 31, and a return spring is arranged between the clamping plate 31 and the sliding groove 29. The positions of the clamping plate 31 and the first clamping groove 24 and the second clamping groove 25 are correspondingly arranged. When the upper unit and the lower unit are in a straight connection state, the clamping plate 31 is clamped into the second clamping groove 25. When the upper unit and the lower unit are in a folded state, the clamping plate 31 is clamped into the first clamping groove 24. When folding is needed, the lower disassembly button 30 is pulled down to unlock, and the upper unit is rotated to the limit position and automatically locked. The return spring is reset. When folding is needed, the lower disassembly button 30 is pulled down again to unlock, and the upper unit is rotated in the opposite direction to restore the straight connection state.

[0037] Referring to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 As shown, the folding structure is provided with a limiting structure, which comprises a limiting block 32 arranged on the convex ring 28 and a ring groove 33 arranged in the upper butt cylinder 21. A step 34 is arranged in the ring groove 33, and the step 34 occupies half of the ring groove 33. The limiting block 32 is correspondingly arranged with the ring groove 33 and movably arranged in the ring groove 33. By sliding the limiting block 32 in the ring groove 33, the rotating area is limited to half a circle. The limiting block 32 can only move in half a circle of the ring groove 33, which plays a limiting role and prevents multiple turns from causing wire winding.

[0038] Referring to the accompanying drawings Figure 1 and the accompanying drawings Figure 7 As shown, the angle between the upper unit and the lower unit after being folded is 90°, and the inclination angles of the upper butt disc 22 and the lower butt disc 26 are both 45°. After being folded, the upper unit and the lower unit become a 90° angle, which is more comfortable and better experienced than the traditional hair dryer with an angle less than 90°.

[0039] Referring to the accompanying drawings Figure 3 and the accompanying drawings Figure 8As shown, both the upper connecting cylinder 21 and the lower inner cylinder 6 are formed by splicing two halves of the shell. The lower end of the upper connecting cylinder 21 is engaged in an upper decorative ring 35, and the upper end of the lower inner cylinder 6 is engaged in a lower decorative ring 36. Both the upper connecting cylinder 21 and the lower inner cylinder 6 adopt a splicing structure, which is convenient for disassembly and assembly, and facilitates the installation of the internal structure. The design of the decorative ring can play a role in stabilizing the structure.

[0040] See appendix Figure 5 As shown, a sealing ring 37 is provided on the outside of the convex ring 28. The design of the sealing ring 37 ensures the sealing performance of the bent structure, prevents air leakage, and guarantees product quality.

[0041] See appendix Figure 6 As shown, the structure of the heating element 3 includes an external cylinder 301 and several heating plates 302 disposed inside the cylinder 301. The heating plates 302 are evenly distributed around the central axis of the cylinder 301. The structure of the heating element 3 is convenient for both installation and ventilation.

[0042] This utility model designs a multi-functional hair styling stick that can be used with hair styling accessories in its straight-connected state; it can also be used as a hair dryer in its bent state; the rotation angle during bending can be limited by a limiting structure to avoid damage to the cord caused by excessive rotation; and it can also be unlocked and locked by a pull button, making it easy to switch between straight-connected and bent modes. It has comprehensive functions and is suitable for widespread application.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-functional hair styling wand characterized in that, The utility model relates to a hair dryer, including upper unit, lower unit and tail unit from top to bottom are sequentially arranged, the upper unit with lower unit upper and lower intercommunication and rotatablely link between two, when the upper unit turns through certain angle, the upper unit with lower unit is the bending state.

2. The multifunctional hair rod according to claim 1, wherein: The upper unit includes upper outer cylinder (1), the inside of upper outer cylinder (1) is provided with upper inner cylinder (2), the inside of upper inner cylinder (2) is provided with heating body (3) and protective screen (4), and the protective screen (4) is located on the outside of the heating body (3); The lower unit includes lower outer cylinder (5), the inside of lower outer cylinder (5) is provided with lower inner cylinder (6), and the lower inner cylinder (6) is sequentially provided with motor (7), rectifier (8) and control mainboard (9) from top to bottom; The tail unit includes outer screen cylinder (10), the inside of outer screen cylinder (10) is provided with air inlet cylinder (11), and the tail end of air inlet cylinder (11) is provided with power line (12).

3. A multi-functional hair stick according to claim 2, wherein: The side of lower outer cylinder (5) is provided with air blowing button (13), heating button (14) and power button (15), air blowing button (13) and heating button (14) are electrically connected with a PCB (16), power button (15) is electrically connected with control mainboard (9), and the PCB (16) is arranged between lower outer cylinder (5) and lower inner cylinder (6).

4. A multi-functional hair stick according to claim 2, wherein: The upper end of upper outer cylinder (1) is provided with upper mounting ring (17), the outer wall of the body of upper outer cylinder (1) is provided with upper dismounting button (18) that can move up and down, the inner wall of upper mounting ring (17) is provided with a plurality of clamping protrusions (19) in the circumferential direction, one side of clamping protrusion (19) is provided with movable baffle (20), and baffle (20) is connected with upper dismounting button (18).

5. A multi-functional hair stick according to claim 2, wherein: The upper unit and the lower unit are connected through a bending structure to realize bending movement, and the bending structure includes upper butt cylinder (21) below upper inner cylinder (2) and lower inner cylinder (6). The lower end of upper butt cylinder (21) is provided with upper butt disc (22), the center axis of upper butt disc (22) is inclinedly arranged relative to upper inner cylinder (2), the middle part of upper butt disc (22) is provided with upper connecting hole (23), and the two sides of upper connecting hole (23) are respectively provided with first clamping groove (24) and second clamping groove (25). The upper end of lower inner cylinder (6) is provided with lower butt disc (26), the center axis of lower butt disc (26) is inclinedly arranged relative to lower inner cylinder (6), the middle part of lower butt disc (26) is provided with lower connecting hole (27), and convex ring (28) is arranged at lower connecting hole (27), the outer diameter of convex ring (28) is greater than the diameter of upper connecting hole (23), the inner diameter of convex ring (28) is less than the diameter of upper connecting hole (23), convex ring (28) is clamped into upper connecting hole (23) and can be rotatably arranged in upper connecting hole (23). The side of the lower outer cylinder (5) is provided with a sliding groove (29), a lower disassembly button (30) movably arranged in the sliding groove (29) is connected with a clamping plate (31), and a reset spring is arranged between the clamping plate (31) and the sliding groove (29); The clamping plate (31) is arranged in position corresponding to the first clamping groove (24) and the second clamping groove (25), the clamping plate (31) is clamped into the second clamping groove (25) when the upper unit and the lower unit are in a straight connection state, and the clamping plate (31) is clamped into the first clamping groove (24) when the upper unit and the lower unit are in a bent state.

6. A multi-functional hair stick according to claim 5, wherein: The bent structure is provided with a limiting structure, the limiting structure comprises a limiting block (32) arranged on the convex ring (28) and a ring groove (33) formed in the upper butt joint cylinder (21), a step (34) is arranged in the ring groove (33), the step (34) occupies half of the ring groove (33), the limiting block (32) is arranged in position corresponding to the ring groove (33) and movably arranged in the ring groove (33).

7. A multi-functional hair stick according to claim 5, wherein: The angle between the upper unit and the lower unit after being rotated and bent is 90°, and the inclination angles of the upper butt joint disc (22) and the lower butt joint disc (26) are both 45°.

8. A multi-functional hair stick according to claim 5, wherein: The upper butt joint cylinder (21) and the lower inner cylinder (6) are each formed by splicing two half shells, the lower end of the upper butt joint cylinder (21) is clamped in an upper decorative ring (35), and the upper end of the lower inner cylinder (6) is clamped in a lower decorative ring (36).

9. A multi-functional hair stick according to claim 5, wherein: The outer part of the convex ring (28) is provided with a sealing ring (37).

10. A multi-functional hair stick according to claim 2, wherein: The structure of the heating body (3) comprises an external cylinder (301) and a plurality of heating plates (302) arranged in the cylinder (301), and the heating plates (302) are uniformly arranged around the central axis of the cylinder (301).

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