Reliable hair dryer

Abstract

The reliable hair drier comprises a machine head and a handle, the machine head comprises a shell, an air duct assembly arranged in the shell and an air inlet protection part fixedly connected to the rear end of the shell, one end of the air duct assembly abuts against the front end of the shell, and the other end of the air duct assembly is fixedly connected with the air inlet protection part in a sleeving mode; a first damping part is arranged between the air duct assembly and the air inlet protection part, the first damping part comprises a radial part and an axial part, the radial part is arranged between the fixed end face of the air duct assembly and the front end face of the air inlet protection part, and the axial part is arranged between the outer peripheral wall of the air duct assembly and the inner peripheral wall of the air inlet protection part. According to the blower, the first damping part is arranged between the air duct assembly and the air inlet protection part, damping between the air duct assembly and the air inlet protection part in the radial direction and the axial direction can be achieved, the structure is simple, meanwhile, the good damping effect is achieved, and meanwhile the buckling stress generated by cold and hot size changes of the air duct assembly can be reduced; buckle breakage is avoided, and the service life of the air inlet protection piece is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hair dryer, concretely relates to a reliable hair dryer. BACKGROUND

[0002] The common hair dryer is internally provided with an air duct assembly, and a heating element is arranged inside the air duct assembly. The heating element generates heat to heat the airflow flowing through the air duct during the operation of the hair dryer, so as to meet the blowing demand of the user. At the same time, the heating element also heats the air duct assembly, which causes the air duct assembly to expand due to heat. The front end and the rear end of the air duct assembly are respectively fixed with a shell assembly and a protective cover. When the air duct assembly expands due to heat, the axial dimension of the air duct assembly increases, which causes the buckle of the protective cover and the shell assembly to generate stress. After a long time of cold and hot cycle, the buckle may be broken, which affects the service life of the hair dryer.

[0003] In the related art, the existing patent CN201811525571.1 discloses a hair dryer, which is provided with a damping structure between the motor cylinder and the shell, so as to reduce the vibration generated by the motor and transmitted to the shell, thereby improving the comfort of the user when holding the hair dryer. The patent can only improve the damping between the motor cylinder and the shell, and the vibration is still transmitted between the motor cylinder and the protective cover. Moreover, the patent cannot solve the problem of damage to the mounting structure of the protective cover caused by the stress generated by the expansion of the air duct assembly due to heat or the impact of the air duct assembly on the protective cover when the hair dryer falls. UTILITY MODEL CONTENT

[0004] The utility model provides a reliable hair dryer, which aims to improve the installation between the air duct assembly and the air inlet protective piece and improve the damping performance of the machine.

[0005] The utility model discloses a reliable hair dryer, which comprises a handle and a head, the head comprises a shell, an air duct assembly arranged in the shell and an air inlet protective piece fixedly connected to the rear end of the shell, one end of the air duct assembly abuts against the front end of the shell, and the other end is fixedly connected to the air inlet protective piece, a first damping piece is arranged between the air duct assembly and the air inlet protective piece, the first damping piece comprises a radial part and an axial part, the radial part is arranged between the fixed end surface of the air duct assembly and the front end surface of the air inlet protective piece, and the axial part is arranged between the outer peripheral wall of the air duct assembly and the inner peripheral wall of the air inlet protective piece.

[0006] The reliable hair dryer of the utility model also has the following additional technical features:

[0007] The axial part extends from the inner peripheral wall of the annular radial part to a direction away from the radial part, and the axial part and the radial part are integrally formed.

[0008] The inner circumferential wall of the air inlet protection piece is provided with a step portion extending inwardly, a gap is formed between the front end face of the air duct assembly and the step portion, and the rear end portion of the axial portion is arranged in the gap to make the air inlet protection piece and the air duct assembly in interference fit.

[0009] The outer circumferential wall of the air duct assembly extends radially to form a fixed end face, and the fixed end face is provided with a screw column, and the air inlet protection piece is provided with a screw hole matched with the screw column.

[0010] The radial portion is provided with a notch avoiding the screw column.

[0011] The air duct assembly is provided with a second damping piece at the front end of the shell.

[0012] The hardness of the second damping piece is greater than that of the first damping piece.

[0013] The air inlet protection piece comprises a first connecting portion in the shape of a ring and a second connecting portion surrounding the outside of the first connecting portion, the air duct assembly is fixedly sleeved with the first connecting portion, and the shell is buckle-fixed with the second connecting portion.

[0014] The air duct assembly comprises a motor cylinder, the motor cylinder is provided with a motor, and a third damping piece is arranged between the motor and the motor cylinder.

[0015] The outer wall of the third damping piece is provided with a first convex rib, the inner wall of the motor cylinder is provided with a second convex rib, and the second convex rib abuts against the first convex rib; and / or, an air sandwich layer is formed between the motor cylinder and the third damping piece.

[0016] Thanks to the above technical scheme, the utility model has the following beneficial effects:

[0017] 1. The reliable hair dryer of the utility model can realize radial and axial damping between the air duct assembly and the air inlet protection piece by arranging the first damping piece therebetween, has simple structure and good damping effect, can reduce the buckle stress of the air duct assembly caused by cold and hot size change, avoids buckle fracture, prolongs the service life of the air inlet protection piece, clamps the radial portion and the axial portion by different parts of the air duct assembly and the air inlet protection piece respectively, has simple installation mode and can guarantee installation effect, the first damping piece can provide axial and radial support for the air duct assembly, can reduce the radial and axial impact of the motor inside the air duct assembly when the hair dryer falls, reduces the impact force of the motor, and prolongs the service life of the motor.

[0018] 2. In order to simplify the structure configuration and installation, the axial part and the radial part are integrally formed, that is, two directions of shock absorption can be realized by using one shock absorbing piece, the use of shock absorbing pieces can be saved, and the installation process is simplified; wherein the axial part extends from the inner circumferential wall of the annular radial part to the direction away from the radial part, or it can be understood that the radial part is formed by folding outward from the front end of the axial part, which is convenient for processing and has low cost.

[0019] 3. In order to realize reliable installation of the air inlet protection piece and the air duct assembly, the inner circumferential wall of the air inlet protection piece is provided with a stepped portion extending inwardly, a gap is formed between the front end face of the air duct assembly and the stepped portion, and the rear end portion of the axial part is arranged in the gap, so that the air inlet protection piece and the air duct assembly are in interference fit. By forming the gap, when the air duct assembly is impacted or axially enlarged due to cold and hot changes, the axial part at the gap can provide shock absorption, and damage to the air inlet protection piece can be avoided.

[0020] 4. The air inlet protection piece and the air duct assembly can be fixed by screws. For example, the outer circumferential wall of the air duct assembly extends radially to form a fixing end face, the fixing end face is provided with a screw column, the air inlet protection piece is provided with a screw hole matched with the screw column, and the screw fixing of the two can not only ensure the firmness of the installation, but also can strengthen the limiting of the air inlet protection piece to the air duct assembly. Axial shaking of the air duct assembly in the shell can cause unstable structure and use and abnormal noise and increase noise.

[0021] Further, the radial part is provided with a notch avoiding the screw column, which can prevent the first shock absorbing piece from interfering with the screw column during installation, affecting the installation effect of the radial part and further affecting the shock absorption effect.

[0022] 5. In order to improve the shock absorption effect, the front end of the air duct assembly abutting the shell is provided with a second shock absorbing piece, and two-stage shock absorption structure can provide multiple shock absorption when the hair dryer falls, which can further reduce the impact force on the motor, so that the motor is not easy to be damaged and has a longer service life.

[0023] Further, the hardness of the second shock absorbing piece is greater than the hardness of the first shock absorbing piece, the hardness of the second shock absorbing piece is greater, which can ensure reliable fixation of the air duct assembly and will not produce large displacement during normal work; and since the rear end of the hair dryer is buckled, when the hair dryer accidentally falls and the rear end lands, the first shock absorbing piece is relatively soft, which can weaken the backward impact force of the air duct assembly and reduce the risk of damage to the buckle.

[0024] 6. The air inlet protection piece is fixed with the air duct assembly and the shell, in order to simplify the installation, the air inlet protection piece comprises a first connecting part and a second connecting part which surrounds the outside of the first connecting part, the air duct assembly is sleeved and fixed with the first connecting part, and the shell is buckled and fixed with the second connecting part, that is, the air inlet protection piece and the shell adopt the buckling connection mode, the structure is relatively simple, and in the case that the air inlet protection piece has been connected with the air duct assembly, the air inlet protection piece is easy to be installed with the shell, and the installation difficulty can be reduced.

[0025] 7. In order to realize the shock absorption of the air duct assembly, the air duct assembly comprises a motor cylinder, a motor is arranged in the motor cylinder, and a third damping piece is arranged between the motor and the motor cylinder, so that the vibration generated by the operation of the motor is less transmitted to the motor cylinder and then to the shell, thereby improving the comfort of the user when holding the hair dryer; and when the hair dryer falls accidentally, the third damping piece can reduce the impact force on the motor, thereby prolonging the service life of the motor.

[0026] Further, the outer wall of the third damping piece is provided with a first convex rib, the inner wall of the motor cylinder is provided with a second convex rib, the second convex rib abuts against the first convex rib, and the limiting between the convex ribs can enhance the limiting of the motor cylinder on the third damping piece and the motor as a whole, and the contact area of the motor cylinder and the motor is reduced, thereby reducing the vibration transmission.

[0027] Further, an air layer is formed between the motor cylinder and the third damping piece, the air layer can absorb the noise of the motor, and is beneficial to reduce the noise of the hair dryer. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 It is an explosion schematic view of the hair dryer head structure under an embodiment of the present application.

[0030] Figure 2 It is a sectional view of the hair dryer under an embodiment of the present application.

[0031] Figure 3 It is Figure 2 It is an enlarged schematic view of the structure in A.

[0032] Figure 4 It is Figure 2 It is an enlarged schematic view of the structure in B.

[0033] Figure 5A structure schematic view of a first damping member in an embodiment of the present application.

[0034] Figure 6 A structure schematic view of a second damping member in an embodiment of the present application.

[0035] Figure 7 An installation position schematic view of the air duct assembly, the axial part and the air inlet protection member in an embodiment of the present application.

[0036] Figure 8 An installation structure schematic view of the motor and the motor cylinder in an embodiment of the present application.

[0037] Reference signs:

[0038] 10, head; 11, handle; 12, shell; 121, opening; 122, buckle; 13, air duct assembly; 131, fixed end surface; 132, screw column; 14, air inlet protection member; 141, step part; 142, first connecting part; 143, second connecting part; 144, clamping groove; 15, first damping member; 151, radial part; 152, axial part; 153, notch; 16, second damping member; 17, gap; 18, motor cylinder; 181, second convex rib; 19, heat insulation cylinder; 20, motor; 21, third damping member; 211, first convex rib; 22, air sandwich. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail in an exemplary manner combined with the drawings of the specification.

[0040] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail in an exemplary manner combined with the drawings of the specification.

[0041] It should be noted that in the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0042] In addition, in the description of the utility model, need understanding is, the term "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the utility model.

[0043] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated features. Thus, a feature defined with a "first", "second", etc. can include one or more of the features implicitly or explicitly.

[0044] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements. However, it is noted that direct connection means that the connection between the two main bodies does not build a connection relationship through a transition structure, but is connected to form a whole only through a connecting structure. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] As Figures 1 to 8As shown, the application provides a reliable hair dryer, including a head 10 and a handle 11, the head 10 includes a shell 12, a wind tunnel assembly 13 arranged in the shell 12, and an air inlet protection piece 14 fixedly connected to the rear end of the shell 12, one end of the wind tunnel assembly 13 abuts the front end of the shell 12, and the other end is fixedly sleeved with the air inlet protection piece 14, and a first damping piece 15 is arranged between the wind tunnel assembly 13 and the air inlet protection piece 14, the first damping piece 15 includes a radial part 151 and an axial part 152, the radial part 151 is arranged between the fixed end surface 131 of the wind tunnel assembly 13 and the front end surface of the air inlet protection piece 14, and the axial part 152 is arranged between the outer peripheral wall of the wind tunnel assembly 13 and the inner peripheral wall of the air inlet protection piece 14.

[0047] Specifically, as shown in the drawings, Figure 1 The front end of the shell 12 is closed, and the rear end is provided with an opening 121, the wind tunnel assembly 13 is installed in the shell 12 from the opening 121, the front end of the wind tunnel assembly 13 is limited by abutting the front end of the shell 12, the rear end of the wind tunnel assembly 13 is fixedly sleeved with the air inlet protection piece 14, and the air inlet protection piece 14 is fixedly connected to the rear end of the shell 12 to block the opening 121, which can limit the rear end of the wind tunnel assembly 13, thereby the two ends of the wind tunnel assembly 13 will not move axially under the limiting action during the working process of the hair dryer, which can improve the structural stability and use reliability. Generally, the outer side of the air inlet protection piece 14 is also provided with a filter screen and an outer cover sleeved outside the filter screen, and the outer cover and the filter screen are detachable structures, so that the filter screen can be disassembled and cleaned or replaced after a period of use to ensure the filtering effect and avoid the filter screen being blocked to cause poor air intake. The outer cover and the air inlet protection piece 14 are both provided with air inlet holes to meet the air intake requirement.

[0048] Based on the above structure, as shown in the drawings, Figure 2 and Figure 3 By arranging the first damping piece 15 between the wind tunnel assembly 13 and the air inlet protection piece 14, the radial and axial damping between the two can be achieved, which is simple in structure and has good damping effect, and can also reduce the stress of the buckle 122 caused by the size change of the cold and hot wind tunnel assembly 13, thereby avoiding the breakage of the buckle 122 and prolonging the service life of the air inlet protection piece 14. The different parts of the wind tunnel assembly 13 and the air inlet protection piece 14 respectively clamp the radial part 151 and the axial part 152, which is simple in installation method and can ensure the installation effect. Moreover, the first damping piece 15 can provide axial and radial support for the wind tunnel assembly 13, which can reduce the radial and axial impact on the motor 20 inside the wind tunnel assembly 13 when the hair dryer falls, reduce the impact force on the motor 20, and thereby prolong the service life of the motor 20.

[0049] The first damping piece 15 achieves the damping of the rear end of the wind tunnel assembly 13, and on this basis, preferably, the front end of the wind tunnel assembly 13 abutting the shell 12 is provided with a second damping piece 16. As shown in the drawings, Figures 2 to 4As shown, the second damping member 16 and the first damping member 15 respectively provide damping at the front and rear ends of the air duct assembly 13, and the two-stage damping structure can provide multiple damping when the hair dryer falls, so as to further reduce the impact force on the motor 20, thereby preventing the motor 20 from being damaged and prolonging the service life.

[0050] Specifically, as shown in Figure 5 and Figure 6 , the second damping member 16 and the first damping member 15 are both L-shaped structures, which can provide axial and radial support for the front end of the air duct assembly 13, and further prevent the air duct assembly 13 from moving axially along the shell 12, so that the overall structure of the hair dryer head 10 is compact and stable.

[0051] Further, the hardness of the second damping member 16 is greater than that of the first damping member 15.

[0052] It can be understood that the second damping member 16 has a greater hardness, which can ensure reliable fixation of the air duct assembly 13 and prevent large displacement during normal operation. Moreover, since the rear end of the hair dryer is connected by the buckle 122, when the hair dryer falls accidentally and the rear end touches the ground, the first damping member 15 is relatively soft, which can weaken the impact force of the air duct assembly 13 in the rear direction and reduce the risk of damage to the buckle 122.

[0053] In order to simplify the structure configuration and installation, the axial portion 152 and the radial portion 151 are integrally formed, that is, one damping member can realize damping in two directions, which can save the use of damping members and simplify the installation process. The axial portion 152 extends from the inner circumferential wall of the annular radial portion 151 in a direction away from the radial portion 151, or it can be understood that the radial portion 151 is folded outward from the front end of the axial portion 152, which is convenient for processing and has low cost.

[0054] As shown in Figure 1 , the outer circumferential wall of the air duct assembly 13 is formed with a fixed end surface 131 extending radially. When installing the first damping member 15, the first damping member 15 is first sleeved on the outer circumferential wall of the air duct assembly 13, so that the radial portion 151 abuts against the fixed end surface 131 of the air duct assembly 13, and then the air inlet protection member 14 is sleeved, so that the inner circumferential wall of the air inlet protection member 14 abuts against the outer side of the axial portion 152 and the front end surface of the air inlet protection member 14 abuts against the outer side of the radial portion 151. When the air inlet protection member 14 is fixed with the air duct assembly 13, the first damping member 15 can be clamped therebetween, without the need for additional installation steps, thereby improving the installation efficiency.

[0055] As a preferred embodiment, the inner circumferential wall of the air inlet protection member 14 is provided with a step portion 141 extending inwardly, a gap 17 is formed between the front end face of the air duct assembly 13 and the step portion 141, and the rear end portion of the axial portion 152 is arranged in the gap 17, so that the air inlet protection member 14 is in interference fit with the air duct assembly 13.

[0056] As shown in Figure 7 , by forming the gap 17, when the air duct assembly 13 is impacted or axially enlarged due to temperature change, the axial portion 152 at the gap 17 can be extruded to provide shock absorption, and damage to the air inlet protection member 14 can be avoided.

[0057] As a preferred embodiment, the outer circumferential wall of the air duct assembly 13 extends radially to form a fixed end face 131, the fixed end face 131 is provided with screw posts 132, and the air inlet protection member 14 is provided with screw holes matched with the screw posts 132.

[0058] As shown in Figure 1 , the air inlet protection member 14 and the air duct assembly 13 are fixed by screws, which can not only ensure the firmness of installation, but also strengthen the limiting of the air inlet protection member 14 on the air duct assembly 13, so as to prevent the air duct assembly 13 from axially shaking in the shell 12, causing unstable structure and use and abnormal noise and increasing noise. Specifically, the screw posts 132 are provided with four, two of which are arranged on the upper circumferences of the air duct assembly 13, and the other two are arranged on the lower circumferences of the air duct assembly 13, and correspondingly, the air inlet protection member 14 is provided with four corresponding screw holes.

[0059] Further, as shown in Figure 5 , the radial portion 151 is provided with a notch 153 avoiding the screw posts 132, which can prevent the first shock absorbing member 15 from interfering with the screw posts 132 during installation, affecting the installation effect of the radial portion 151 and further affecting the shock absorbing effect.

[0060] As a preferred embodiment, the air inlet protection member 14 includes a first connecting portion 142 in the shape of a ring and a second connecting portion 143 surrounding the outside of the first connecting portion 142, the air duct assembly 13 is fixedly sleeved with the first connecting portion 142, and the shell 12 is fixedly buckled with the second connecting portion 143.

[0061] Specifically, in the example shown in Figure 1 , the fixed end face 131 of the air duct assembly 13 is provided with screw posts 132, and the outer circumferential wall of the first connecting portion 142 is provided with screw holes, so as to realize the screw fixing of the air inlet protection member 14 and the air duct assembly 13. In the case where the air inlet protection member 14 has been connected with the air duct assembly 13, in order to facilitate the fixing of the air inlet protection member 14 with the shell 12 and reduce the installation difficulty, the two can be connected by buckling 122, as shown in Figure 1As shown, the inner peripheral wall of the housing 12 is provided with a buckle 122, and the second connecting part 143 is provided with a slot 144. During the process of installing the air inlet protective component 14 and the air duct assembly 13 into the housing 12, the buckle 122 and the slot 144 are engaged accordingly, making the operation relatively simple. Based on the setting of the first shock absorber 15 in this application, when the air duct assembly 13 is heated and expands, the first shock absorber 15 can undergo elastic deformation to absorb the dimensional change, which can reduce the stress at the fixing position of the buckle 122 of the housing 12 and extend the fatigue life of the blower.

[0062] Based on the above embodiment, the air duct assembly 13 includes a motor cylinder 18 and a heat insulation cylinder 19 arranged sequentially along the direction away from the air inlet protection member 14. The interiors of the motor cylinder 18 and the heat insulation cylinder 19 are connected to form an airflow duct, providing a path for the blower to blow air normally. The first shock absorber 15 is specifically disposed between the motor cylinder 18 and the air inlet protection member 14. Further, the second shock absorber 16 is disposed between the heat insulation cylinder 19 and the housing 12.

[0063] In a preferred embodiment, the air duct assembly 13 includes a motor cylinder 18, a motor 20 is provided inside the motor cylinder 18, and a third shock absorber 21 is provided between the motor 20 and the motor cylinder 18.

[0064] like Figure 8 As shown, by providing the third shock absorber 21, less vibration generated by the motor 20 during operation can be transmitted to the motor barrel 18 and then to the housing 12, thereby improving the user's comfort when using the handheld hair dryer. Moreover, in the event of an accidental drop, the third shock absorber 21 can reduce the impact force on the motor 20, extending the service life of the motor 20. Preferably, the third shock absorber 21 covers the entire circumferential surface of the motor 20 to enhance the shock absorption effect.

[0065] Furthermore, the outer wall of the third shock absorber 21 is provided with a first rib 211, and the inner wall of the motor cylinder 18 is provided with a second rib 181, the second rib 181 abutting against the first rib 211. Figure 8 As shown, the limiting between the ribs can strengthen the limiting of the motor barrel 18 on the third damping component 21 and the motor 20 as a whole, while reducing the contact area between the motor barrel 18 and the motor 20, thereby reducing vibration transmission.

[0066] The third damping component 21 can be provided with one or more annular ribs to ensure soft contact between the motor cylinder 18 and the motor 20. In the area where the third damping component 21 is not provided with ribs, an air gap 22 is formed between it and the inner wall of the motor cylinder 18. The air gap 22 can absorb the noise of the motor 20, which helps to reduce the noise of the blower.

[0067] The technical scheme of the utility model is not limited to the above embodiment, it should be pointed out that the technical scheme of any one embodiment is combined with the technical scheme of one or more other embodiments, which is within the protection scope of the utility model. Although the utility model has been described in detail by general description and specific embodiments in the above, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model all belong to the range of the utility model required to be protected.

Claims

1.A reliable hair dryer, comprising a head and a handle, the head comprising a housing, an air duct assembly arranged in the housing, and an air inlet guard fixedly connected to a rear end of the housing, the air duct assembly abutting a front end of the housing at one end and being fixedly sleeved with the air inlet guard at the other end, characterized in that, a first damping member is arranged between the air duct assembly and the air inlet guard, the first damping member comprising a radial portion and an axial portion, the radial portion being arranged between a fixed end surface of the air duct assembly and a front end surface of the air inlet guard, and the axial portion being arranged between an outer peripheral wall of the air duct assembly and an inner peripheral wall of the air inlet guard. 2.The reliable hair dryer according to claim 1, characterized in that, the axial portion extends away from the radial portion from the inner peripheral wall of the annular radial portion, and the axial portion and the radial portion are integrally formed. 3.The reliable hair dryer according to claim 1, characterized in that, the inner peripheral wall of the air inlet guard is provided with a step portion extending inwardly, a gap is formed between the front end surface of the air duct assembly and the step portion, and a rear end portion of the axial portion is arranged in the gap to make the air inlet guard and the air duct assembly in interference fit. 4.The reliable hair dryer according to claim 1, characterized in that, the outer peripheral wall of the air duct assembly extends radially to form a fixed end surface, the fixed end surface is provided with a screw column, and the air inlet guard is provided with a screw hole matched with the screw column. 5.The reliable hair dryer according to claim 4, characterized in that, the radial portion is provided with a notch avoiding the screw column. 6.The reliable hair dryer according to claim 1, characterized in that, the air duct assembly is provided with a second damping member at the front end abutting the housing. 7.The reliable hair dryer according to claim 6, characterized in that, the hardness of the second damping member is greater than that of the first damping member. 8.The reliable hair dryer according to claim 1, characterized in that, the air inlet guard comprises an annular first connecting portion and a second connecting portion surrounding the outside of the first connecting portion, the air duct assembly is fixedly sleeved with the first connecting portion, and the housing is snap-fitted with the second connecting portion. 9.The reliable hair dryer according to claim 1, characterized in that, the air duct assembly comprises a motor cylinder, the motor cylinder is provided with a motor, and a third damping member is arranged between the motor and the motor cylinder. 10.The reliable hair dryer according to claim 9, characterized in that, an outer wall of the third damping member is provided with a first protruding rib, an inner wall of the motor cylinder is provided with a second protruding rib, and the second protruding rib abuts the first protruding rib; and / or, an air sandwich layer is formed between the motor cylinder and the third damping member. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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