Safe and reliable hair drier

Abstract

The utility model discloses a safe and reliable hair drier which comprises a shell, a stepless adjusting assembly and a control panel, the stepless adjusting assembly and the control panel are arranged on the shell, the stepless adjusting assembly comprises an encoder and an adjusting roller arranged on a rotating shaft of the encoder in a sleeving mode, and the encoder is used for detecting a rotating signal of the adjusting roller and sending a signal to the control panel; the air speed and / or the heating temperature of the blower are / is adjusted in a stepless mode, a mounting opening is formed in the shell, the adjusting roller partially protrudes out of the mounting opening, an assembling gap is formed between the mounting opening and the adjusting roller, and a flexible sealing piece is arranged in the assembling gap to prevent external dirt from entering the shell through the assembling gap. According to the blower, the flexible sealing piece is additionally arranged in the assembling gap between the adjusting roller and the mounting opening, the problem that external dirt enters the shell through the assembling gap to damage internal electronic elements can be effectively solved, dustproof and waterproof protection can be achieved, it is ensured that the blower can be normally used, and the service life of the blower can be prolonged.

Description

Technical Field

[0001] The utility model relates to the field of hair dryers, in particular to a safe and reliable hair dryer. Background Art

[0002] Existing hair dryers have limited control functions, with only three temperature settings: high, medium, and cold, and only two or three speed settings. These limitations make temperature and speed adjustments difficult to meet user styling needs beyond daily hair drying. To address this issue, a new hair dryer has emerged on the market that offers stepless temperature and speed adjustments, increasing the variety of operating modes, meeting more user needs, and enhancing the user experience.

[0003] Hair dryers with stepless adjustment are generally implemented with a roller in conjunction with an encoder. Since a portion of the roller is exposed for the user to turn, there is a gap at the installation position of the roller. When in use, external moisture, dust, etc. can easily enter the interior of the machine with the rotation of the roller, making it easy for external moisture and dust to be brought into the machine and reach the control panel, which may cause the control panel to fail and affect the normal function of the machine. For example, patent CN116636686A discloses a hair dryer that provides an installation method for a roller assembly and a control panel. Specifically, a sinking groove is provided at the handle, and a storage compartment with an open top is formed in the sinking groove. The roller assembly and control panel are arranged in the storage compartment. Since the roller is a rotating component, there must be a matching gap between the exposed portion of the roller and the handle shell. This solution does not involve waterproof and dustproof protection. There is a problem that external moisture, dust, etc. can easily enter the interior of the machine with the rotation of the roller and damage the control panel, which urgently needs to be solved. Utility Model Content

[0004] In order to solve the technical problem in the prior art that external dirt can easily enter the interior of the shell through the fitting gap between the roller and the hair dryer shell and damage the electronic components inside the shell, the utility model provides a safe and reliable hair dryer, which prevents external dirt from entering the interior of the shell through the assembly gap by strengthening the seal of the adjustment roller installation position.

[0005] The utility model discloses a safe and reliable hair dryer, comprising a shell and a stepless adjustment component and a control panel arranged on the shell, the stepless adjustment component comprising an encoder and an adjustment roller sleeved on a rotating shaft of the encoder, the encoder being used to detect a rotation signal of the adjustment roller and send a signal to the control panel to steplessly adjust the wind speed and / or heating temperature of the hair dryer, a mounting opening being provided on the shell, the adjustment roller partially protruding from the mounting opening, an assembly gap being provided between the mounting opening and the adjustment roller, and a flexible sealing member being provided in the assembly gap to prevent external dirt from entering the interior of the shell through the assembly gap.

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

[0007] The inner peripheral wall of the installation opening is provided with a convex rib, and the outer peripheral wall of the flexible sealing component is provided with a mounting groove which is plugged and matched with the convex rib.

[0008] The inner wall of the housing is provided with a first supporting wall extending inward from the mounting opening for supporting the adjusting roller, and the first supporting wall is arranged to be inclined downward from the inside to the outside.

[0009] An air duct is provided in the shell, and a protective cover is provided in the air duct. The protective cover and the shell are combined to form a protective cavity surrounding the adjusting roller.

[0010] An air inlet is provided at the lower end of the shell, and the protective cover is provided with an arc-shaped air guide surface extending upward from the bottom wall of the protective cover.

[0011] The protective cover is arranged in an arc shape around the adjusting roller.

[0012] A fixing portion for fixing the button and a wire groove for accommodating wires are provided on a side of the protective cover facing away from the installation opening.

[0013] The regulating roller includes a first roller for regulating temperature and a second roller for regulating wind speed, and the first roller and the second roller are arranged at intervals.

[0014] The first roller and the second roller are arranged in sequence from top to bottom. The rotating shaft of the encoder includes an outer shaft and an inner shaft arranged concentrically. The outer shaft is fixedly connected to the second roller, and the inner shaft is fixedly connected to the first roller.

[0015] A protective cover is provided in the shell corresponding to the adjusting roller, and the inner wall of the protective cover is provided with a first extension wall located at the top of the protective cover and extending toward the installation port, and a second extension wall located at the bottom of the protective cover, the first extension wall is provided with a first hole for the inner shaft to pass through, and the second extension wall is provided with a second hole for the outer shaft to pass through, and the inner diameter of the first hole is smaller than the inner diameter of the second hole.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The safe and reliable hair dryer of the utility model can effectively solve the problem of external dirt entering the shell through the assembly gap and damaging the internal electronic components by adding a flexible seal in the assembly gap between the adjusting roller and the mounting port, and can achieve dustproof and waterproof protection, ensure that the hair dryer can be used normally, and extend its service life; the flexible seal can adaptively deform when the adjusting roller rotates, which will not affect the normal use of the adjusting roller and has a certain reliability.

[0018] 2. As a preferred embodiment, the inner circumferential wall of the mounting opening is provided with a rib, and the outer circumferential wall of the flexible seal is provided with a mounting groove that engages with the rib. The rib and mounting groove cooperate to facilitate installation of the flexible seal and improve its secure fixation, preventing the flexible seal from falling out of the mounting opening and affecting the sealing effect.

[0019] 3. As a preferred embodiment, the inner wall of the housing is provided with a first support wall extending inward from the mounting opening to support the adjusting roller. The first support wall is arranged downwardly and slanted from the inside outward. The portion of the adjusting roller located within the housing is supported by the first support wall, which stabilizes the rotation of the adjusting roller and restricts its upward and downward movement. The first support wall is arranged downwardly and slanted from the inside outward, allowing any dirt that accidentally enters to flow outward along the first support wall, thereby preventing the dirt from entering deeper into the housing and improving the protective effect.

[0020] 4. As a preferred embodiment, the housing includes an air duct, which is equipped with a protective cover. The protective cover and the housing together form a protective cavity surrounding the adjustment wheel. This protective cavity, together with the flexible seal, provides dual protection. Even if a small amount of dirt enters, it is trapped in the protective cavity, preventing it from entering the air duct and damaging the electronic components within, thus enhancing the protective effect. Furthermore, the protective cover prevents the airflow in the air duct from escaping from the mounting opening and circulating there, which could result in poor heat dissipation.

[0021] As a preferred embodiment of this embodiment, the housing is provided with an air inlet at the lower end, and the protective cover is provided with a curved air guide surface extending upward from the bottom wall of the protective cover. The curved air guide surface facilitates smoother airflow, reduces wind resistance, and improves air circulation efficiency when air flows through the protective cover.

[0022] As a preferred embodiment of this embodiment, the protective cover is arranged in an arc shape around the adjustment roller. This solution can form a larger airflow space outside the protective cover, making the air flow in the air duct smoother and improving the heat dissipation effect of the component.

[0023] As a preferred embodiment of this embodiment, the side of the protective cover facing away from the mounting opening is provided with a fixing portion for securing the button and a wire trough for accommodating the wires. In addition to isolating the adjustment wheel from the internal electrical components, the protective cover also provides a mounting structure for the button, facilitating a compact design. The wire trough, used to guide and secure the wires, prevents air flow during operation from disturbing the wires and causing noise and potential safety hazards.

[0024] 5. As a preferred embodiment, the adjustment rollers include a first roller for adjusting temperature and a second roller for adjusting air speed, with the first and second rollers spaced apart. This solution enables stepless adjustment of temperature and air speed. Users can adjust the corresponding rollers according to their needs to achieve a variety of combined effects, enriching the use of the hair dryer. The spacing between the first and second rollers ensures a compact structural layout without causing interference, facilitating independent operation.

[0025] As a preferred embodiment of this embodiment, the first and second rollers are arranged sequentially from top to bottom, and the encoder's rotating shaft includes a concentrically arranged outer shaft and inner shaft, the outer shaft being fixedly connected to the second roller, and the inner shaft being fixedly connected to the first roller. This solution utilizes an integrated dual-stage encoder structure, which simplifies the structural configuration and promotes a compact structure. It also avoids the need for a larger housing space when the first and second rollers are arranged laterally, which would increase the size of the hair dryer, and the need to use two encoders, which would complicate the structure.

[0026] Furthermore, a protective cover is provided within the housing corresponding to the adjustment roller. The inner wall of the protective cover is provided with a first extension wall at the top of the protective cover, extending toward the mounting opening, and a second extension wall at the bottom of the protective cover. The first extension wall is provided with a first hole for the inner shaft to pass through, and the second extension wall is provided with a second hole for the outer shaft to pass through. The inner diameter of the first hole is smaller than the inner diameter of the second hole. The provision of the protective cover further prevents dirt from entering the air duct of the housing and damaging the internal electronic components. The first and second holes have different inner diameters to accommodate encoder shafts of different diameters, forming a fool-proof design to prevent incorrect installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 This is a structural schematic diagram of a shell having a mounting port provided with a flexible seal according to one embodiment of the present application.

[0029] Figure 2 for Figure 1 Schematic diagram of the inside of the shell.

[0030] Figure 3 This is a structural schematic diagram of the installation port under one embodiment of the present application.

[0031] Figure 4This is a schematic structural diagram of a flexible seal according to one embodiment of the present application.

[0032] Figure 5 This is a structural schematic diagram of a shell provided with a first supporting wall in one embodiment of the present application.

[0033] Figure 6 This is a structural schematic diagram of a protective cover provided with a second supporting wall in one embodiment of the present application.

[0034] Figure 7 This is a schematic cross-sectional view of the internal structure of a hair dryer according to one embodiment of the present application.

[0035] Figure 8 for Figure 7 A magnified schematic diagram of the structure at center A.

[0036] Figure 9 This is a schematic diagram of the air inlet path of a hair dryer under one embodiment of the present application.

[0037] Figure 10 This is a schematic structural diagram of one side of a protective cover in one embodiment of the present application.

[0038] Figure 11 for Figure 10 Schematic diagram of the structure on the other side of the protective cover.

[0039] Figure 12 This is a schematic diagram of an embodiment of the present application in which a protective cover surrounds an adjusting wheel in an arc shape.

[0040] Figure 13 This is a schematic diagram of a square protective cover surrounding an adjustment wheel in one embodiment of the present application.

[0041] Reference numerals:

[0042] 10. Housing; 11. Encoder; 111. Outer shaft; 112. Inner shaft; 12. Control panel; 13. Mounting port; 131. Raised rib; 14. Flexible seal; 141. Mounting slot; 15. Machine head; 16. Handle; 161. Handle rear shell; 162. Handle front shell; 17. First support wall; 18. Protective cover; 181. Second support wall; 182. Arc-shaped air guide surface; 183. Fixing portion; 184. Wire trough; 185. First extension wall; 186. Second extension wall; 187. First hole position; 188. Second hole position; 19. Air duct; 20. Air inlet; 21. First roller; 22. Second roller; 23. Third extension wall; 24. Fourth extension wall. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0044] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0045] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0046] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0048] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or an interaction between two components. However, the phrase "direct connection" indicates that the two connected entities are not connected through a transition structure, but are connected solely through a connecting structure to form a single entity. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] like Figures 1 to 13 As shown, the present application provides a safe and reliable hair dryer, including a shell 10 and a stepless adjustment component and a control panel 12 arranged on the shell 10. The stepless adjustment component includes an encoder 11 and an adjustment roller mounted on the rotating shaft of the encoder 11. The encoder 11 is used to detect the rotation signal of the adjustment roller and send a signal to the control panel 12 to steplessly adjust the wind speed and / or heating temperature of the hair dryer. A mounting opening 13 is provided on the shell 10, and the adjustment roller partially protrudes from the mounting opening 13. An assembly gap is provided between the mounting opening 13 and the adjustment roller, and a flexible seal 14 is provided in the assembly gap to prevent external dirt from entering the interior of the shell 10 through the assembly gap.

[0051] The safe and reliable hair dryer of this application, such as Figure 1 and Figure 2 As shown, by adding a flexible seal 14 in the assembly gap between the adjusting roller and the mounting port 13, the problem of external dirt entering the housing 10 through the assembly gap and damaging the internal electronic components can be effectively solved, dust and waterproof protection can be achieved, ensuring that the hair dryer can be used normally and extending its service life; the flexible seal 14 can adaptively deform when the adjusting roller rotates, and will not affect the normal use of the adjusting roller, and has a certain reliability.

[0052] The hair dryer of the present application can realize stepless adjustment of the wind speed and / or heating temperature of the hair dryer. Preferably, the wind speed and temperature can be adjusted steplessly. A variety of operating modes can be selected, such as high temperature and high speed, high temperature and low speed, low temperature and low speed, and low temperature and high speed, etc., to meet the various usage needs of users and increase the flexibility of use of the hair dryer. The hair dryer, for example, includes a head 15 and a handle 16 connected to the bottom of the head 15. The stepless adjustment component can be arranged at the position of the handle 16, so that the user can operate the adjustment roller with one hand when holding the handle 16, thereby improving the convenience of operation. The control panel 12 can be arranged in the handle 16, for example, below the adjustment roller. By blocking external dirt from entering the interior of the housing 10 through the assembly gap, it can prevent external dirt from entering the interior of the housing 10 and reaching the control panel 12, causing the control panel 12 to fail, thereby ensuring the performance and life of the control panel 12.

[0053] As a preferred embodiment, the inner peripheral wall of the installation opening 13 is provided with a convex rib 131 , and the outer peripheral wall of the flexible sealing member 14 is provided with a mounting groove 141 that is plugged into and fits with the convex rib 131 .

[0054] like Figure 3 and Figure 4 As shown, the use of ribs 131 and mounting grooves 141 not only facilitates the installation of the flexible seal 14, but also improves the secure fixation of the flexible seal 14, preventing the flexible seal 14 from slipping out of the mounting opening 13 and affecting the sealing effect. The mounting opening 13 and the flexible seal 14 are, for example, long strips in shape. The ribs 131 are arranged along the inner circumferential wall of the mounting opening 13, and the corresponding mounting grooves 141 are arranged along the outer circumferential wall of the flexible seal 14. This provides a larger mating area between the ribs 131 and the mounting grooves 141, thereby enhancing circumferential positioning. The flexible seal 14 is elastic, and during installation, a slight squeeze is applied to the flexible seal 14 to insert the ribs 131 into the mounting grooves 141.

[0055] It is understood that the installation of the flexible seal 14 is not limited to Figure 3 and Figure 4 Alternatively, a slot may be provided on the inner peripheral wall of the mounting opening 13, and a rib may be provided on the outer peripheral wall of the flexible sealing member 14, and the flexible sealing member 14 may be fixed by the rib cooperating with the slot.

[0056] As a preferred embodiment, the inner wall of the housing 10 is provided with a first supporting wall 17 extending inward from the mounting opening 13 to support the adjusting roller. The first supporting wall 17 is arranged to be inclined downward from the inside to the outside.

[0057] like Figure 5As shown, the portion of the adjustment roller located within the housing 10 is supported by a first support wall 17, which stabilizes the adjustment roller during rotation and limits its upward and downward movement. The first support wall 17 is tilted downward from the inside outward, allowing any dirt that accidentally enters to flow outward along the first support wall 17, thereby preventing the dirt from entering deeper into the housing 10 and improving the protective effect. Specifically, the first support wall 17 supports at least a portion of the adjustment roller and is provided with a through-hole for the rotating shaft of the encoder 11 to pass through.

[0058] In one embodiment, the adjusting roller is supported only by the first supporting wall 17 .

[0059] In another embodiment, Figure 6 As shown, a protective cover 18 is provided in the housing 10, and the protective cover 18 is provided with a second support wall 181 that is docked with the first support wall 17. The adjusting roller is supported by the first support wall 17 and the second support wall 181. After the first support wall 17 and the second support wall 181 are docked, an axial hole is formed for the rotating shaft of the encoder 11 to pass through. Figure 8 As shown, the protective cover 18 cooperates with the housing 10 to confine the adjusting roller within a limited space, which can prevent the roller from getting stuck due to improper user operation during use of the adjusting roller, thereby ensuring the reliability of the use of the adjusting roller.

[0060] In yet another embodiment, a protective cover 18 is provided in the housing 10 . The protective cover 18 is provided with a second supporting wall 181 extending toward the installation opening 13 . The adjusting roller is supported only by the second supporting wall 181 .

[0061] As a preferred embodiment, an air duct 19 is provided in the housing 10 , and a protective cover 18 is provided in the air duct 19 . The protective cover 18 and the housing 10 are combined to form a protective cavity surrounding the adjusting roller.

[0062] like Figure 7 and Figure 8 As shown, by setting up a protective cavity, it forms a double protection with the flexible seal 14. Even if a small amount of dirt enters, it can only be blocked in the protective cavity, which can prevent the dirt from entering the air duct 19 and damaging the internal electronic components, thereby enhancing the protection effect. In addition, the blocking of the protective cover 18 can prevent the air flow in the air duct 19 from flowing out from the position of the installation port 13 and forming a circulation at this position, resulting in poor heat dissipation effect.

[0063] Specifically, the stepless adjustment assembly is located on the handle 16, the adjustment roller is located on the handle rear shell 161, and the protective cover 18 and the handle rear shell 161 enclose a protective cavity. As air enters the handle 16 from the lower end and flows upward, it can flow upward through the space between the protective cover 18 and the handle front shell 162 and ultimately flow into the handpiece 15. The protective cover 18 blocks the airflow from flowing out of the mounting opening 13, ensuring the hair dryer's efficient hot air output and heat dissipation efficiency within the air duct 19.

[0064] As a preferred embodiment of this embodiment, the lower end of the housing 10 is provided with an air inlet 20, and the protective cover 18 is provided with a curved air guide surface 182 extending upward from the bottom wall of the protective cover 18. As shown in Figure 9, when air flows through the protective cover 18, the curved air guide surface 182 helps guide the airflow more smoothly, reduces wind resistance, and improves air circulation efficiency.

[0065] As a preferred embodiment of this embodiment, the protective cover 18 is arranged in an arc shape around the adjustment roller. Figure 12 As shown, this solution can form a larger airflow space between the protective cover 18 and the handle front shell 162, so that the air flow in the air duct 19 is smoother, which can improve the heat dissipation effect of the components.

[0066] It is understood that in other embodiments, such as Figure 13 As shown, the protective cover 18 can also be arranged in a square shape around the adjusting roller.

[0067] As a preferred embodiment of the present embodiment, a fixing portion 183 for fixing the button and a wire groove 184 for accommodating wires are provided on a side of the protective cover 18 facing away from the installation opening 13 .

[0068] like Figure 11 As shown, the protective cover 18 is not only used to isolate the adjustment wheel from the internal electrical components, but also provides a button installation structure. It has multiple uses and can promote the compactness of the structural layout. The wire groove 184 is used to pass and fix the wires, which can prevent the air flowing during the operation of the hair dryer from disturbing the wires and causing abnormal noise and safety hazards.

[0069] As a preferred embodiment, the adjustment rollers include a first roller 21 for adjusting temperature and a second roller 22 for adjusting air speed, with the first roller 21 and the second roller 22 spaced apart. This solution allows for stepless adjustment of temperature and air speed, allowing users to adjust the corresponding rollers according to their needs to achieve a variety of combined effects, enriching the use of the hair dryer. The spacing of the first roller 21 and the second roller 22 ensures a compact structural layout without causing interference, facilitating independent operation of each.

[0070] As a preferred embodiment of the present embodiment, the first roller 21 and the second roller 22 are arranged in sequence from top to bottom, and the rotating shaft of the encoder 11 includes a concentrically arranged outer shaft 111 and an inner shaft 112, the outer shaft 111 is fixedly connected to the second roller 22, and the inner shaft 112 is fixedly connected to the first roller 21.

[0071] like Figure 8 As shown, this solution utilizes an integrated, dual-stage encoder 11, simplifying the structural configuration and promoting a compact layout. This avoids the need for a larger layout space within the housing 10, which would increase the size of the hair dryer, and the need to use two encoders 11, which would complicate the structure. The smaller spacing between the first and second rollers 21, 22 facilitates user switching between the two, improving the user experience.

[0072] Furthermore, a protective cover 18 is provided in the housing 10 corresponding to the adjusting roller. The inner wall of the protective cover 18 is provided with a first extension wall 185 located at the top of the protective cover 18 and extending toward the mounting port 13, and a second extension wall 186 located at the bottom of the protective cover 18. The first extension wall 185 is provided with a first hole 187 for the inner shaft 112 to pass through, and the second extension wall 186 is provided with a second hole 188 for the outer shaft 111 to pass through. The inner diameter of the first hole 187 is smaller than the inner diameter of the second hole 188.

[0073] When the protective cover 18 is provided, dirt can be further prevented from entering the air duct 19 of the shell 10 and damaging the internal electronic components; the first hole 187 and the second hole 188 adopt different inner diameters, which can adapt to the rotating shafts of different diameters of the encoder 11, and also constitute a fool-proof design to avoid incorrect installation.

[0074] In one example, if Figure 8 and Figure 10 As shown, the shell 10 is provided with a third extension wall 23 that is docked with the first extension wall 185 and a fourth extension wall 24 that is docked with the second extension wall 186, wherein the first hole 187 cooperates with the hole on the third extension wall 23 to form a circular hole for the inner shaft 112 to pass through; the second hole 188 cooperates with the hole on the fourth extension wall 24 to form a circular hole for the outer shaft 111 to pass through. In this example, the first hole 187 and the second hole 188 are both semicircular holes.

[0075] In another example, the first extension wall 185 and the second extension wall 186 may extend to abut against the inner wall of the housing 10 , and the first hole 187 and the second hole 188 are both circular holes.

[0076] The technical solutions protected by this utility model are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of this utility model. Although the above description of this utility model has been provided in detail using general instructions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on this utility model. Therefore, such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A safe and reliable hair dryer, comprising a housing, a stepless adjustment assembly and a control panel mounted on the housing, wherein the stepless adjustment assembly comprises an encoder and an adjustment roller mounted on a rotating shaft of the encoder, wherein the encoder is configured to detect a rotation signal of the adjustment roller and transmit a signal to the control panel to steplessly adjust the wind speed and / or heating temperature of the hair dryer, characterized in that: The shell is provided with a mounting opening, the adjusting roller partially protrudes from the mounting opening, an assembly gap is provided between the mounting opening and the adjusting roller, and a flexible sealing member is provided in the assembly gap to prevent external dirt from entering the shell through the assembly gap.

2. A safe and reliable hair dryer according to claim 1, characterized in that: The inner peripheral wall of the installation opening is provided with a convex rib, and the outer peripheral wall of the flexible sealing component is provided with a mounting groove which is plugged and matched with the convex rib.

3. A safe and reliable hair dryer according to claim 1, characterized in that: The inner wall of the housing is provided with a first supporting wall extending inward from the mounting opening for supporting the adjusting roller, and the first supporting wall is arranged to be inclined downward from the inside to the outside.

4. A safe and reliable hair dryer according to claim 1, characterized in that: An air duct is provided in the shell, and a protective cover is provided in the air duct. The protective cover and the shell are combined to form a protective cavity surrounding the adjusting roller.

5. A safe and reliable hair dryer according to claim 4, characterized in that: An air inlet is provided at the lower end of the shell, and the protective cover is provided with an arc-shaped air guide surface extending upward from the bottom wall of the protective cover.

6. A safe and reliable hair dryer according to claim 4, characterized in that: The protective cover is arranged in an arc shape around the adjusting roller.

7. A safe and reliable hair dryer according to claim 4, characterized in that: A fixing portion for fixing the button and a wire groove for accommodating wires are provided on a side of the protective cover facing away from the installation opening.

8. A safe and reliable hair dryer according to claim 1, characterized in that: The regulating roller includes a first roller for regulating temperature and a second roller for regulating wind speed, and the first roller and the second roller are arranged at intervals.

9. A safe and reliable hair dryer according to claim 8, characterized in that: The first roller and the second roller are arranged in sequence from top to bottom. The rotating shaft of the encoder includes an outer shaft and an inner shaft arranged concentrically. The outer shaft is fixedly connected to the second roller, and the inner shaft is fixedly connected to the first roller.

10. A safe and reliable hair dryer according to claim 9, characterized in that: A protective cover is provided in the shell corresponding to the adjusting roller, and the inner wall of the protective cover is provided with a first extension wall located at the top of the protective cover and extending toward the installation port, and a second extension wall located at the bottom of the protective cover, the first extension wall is provided with a first hole for the inner shaft to pass through, and the second extension wall is provided with a second hole for the outer shaft to pass through, and the inner diameter of the first hole is smaller than the inner diameter of the second hole.

Images