Hair dryer back cover assembly and hair dryer

Abstract

This invention provides a back cover assembly for a hair dryer and the hair dryer itself. The back cover assembly has a connecting end for connecting to the barrel of the hair dryer, and includes a light-emitting element, a light-diffusing element for softening the light emitted by the light-emitting element, and a housing. The housing is disposed outside the light-diffusing element to project the light processed by the light-diffusing element outward. The light emitted by the light-emitting element is directed radially inward toward the back cover assembly or toward the side closer to the connecting end. This invention's back cover assembly and hair dryer prevent light leakage from the connecting part.

Description

Technical Field

[0001] This utility model relates to the field of electrical appliances, and in particular to a back cover assembly for a hair dryer and the hair dryer itself. Background Technology

[0002] In daily life, people usually blow-dry their hair after washing it; especially in cold winter weather, wet hair is even more difficult to dry completely. Hair dryers have solved this problem. However, a type of hair dryer currently on the market has a light panel and diffuser inside the nozzle. However, the current light panel is positioned perpendicular to the central axis of the nozzle, and the LEDs on the panel emit light towards the rear of the nozzle. This easily results in a noticeable grainy effect in the light displayed on the outer casing at the rear of the nozzle. Furthermore, because the light shines directly backward, the LEDs are visible, and light leaks out from the connection points.

[0003] Therefore, it is necessary to improve the existing hair dryer's back cover assembly and the hair dryer itself to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a back cover assembly and a hair dryer that can prevent light from leaking outwards from the connection part.

[0005] To achieve the above objectives, this utility model provides a back cover assembly for a hair dryer, which has a connecting end for connecting to the barrel of the hair dryer, and includes a light-emitting element, a light-diffusing element for softening the light emitted by the light-emitting element, and a housing. The housing is disposed outside the light-diffusing element to project the light processed by the light-diffusing element outward. The light emitted by the light-emitting element is directed toward the radially inner side of the back cover assembly or toward the side close to the connecting end.

[0006] In this way, the light emitted by the light-emitting element shines radially inward toward the rear cover assembly or toward the side closer to the connection end, rather than directly toward the rear of the rear cover assembly. This prevents the light emitted by the light-emitting element from being directly seen and shining into the user's eyes, avoiding glare and preventing light leakage from the connection point. In addition, after the light emitted by the light-emitting element is homogenized and softened by the light-diffusing element, the "glaring" or "grainy" light spots caused by point light sources can be eliminated, resulting in softer light and thus allowing the rear cover assembly to present a better visual effect.

[0007] As a further improvement of this utility model, the light-diffusing component is provided with a receiving groove, which is formed by recessing from the side of the light-diffusing component near the connecting end toward the direction away from the connecting end, and the light-emitting component is received in the receiving groove.

[0008] In this way, the receiving groove provides installation space for the light-emitting component, and the physical constraint of the groove wall ensures the radial and axial position of the light-emitting component, eliminating the need for additional support and positioning structures, preventing the light-emitting component from loosening due to vibration during the operation of the blower, and improving the reliability of long-term use; at the same time, the enclosing structure of the receiving groove can also form a physical barrier between the light-emitting component and the external environment, reducing the direct contact of dust / moisture with the light source or circuit, thereby extending the service life of the light-emitting component.

[0009] As a further improvement of this utility model, the light-emitting element has a carrier and a light source disposed on the carrier. The light source is disposed on the radial inner side of the carrier or on the side near the connecting end. The light-emitting element is provided with a plurality of light sources arranged in a circumferential direction.

[0010] Thus, by placing the light source on the carrier, it facilitates the integration and installation of the light source with other electronic devices. By placing the light source on the radially inner side of the carrier or on the side close to the connection end, the light emitted by the light source is mainly directed towards the internal radial center or axial depth of the rear cover assembly, that is, towards the inside of the cylinder. This prevents the light from shining directly into the user's eyes from the rear end or side of the rear cover assembly, avoiding glare and improving safety and visual comfort. At the same time, it can more effectively utilize the light guiding, scattering and uniform light characteristics of the light-diffusing component to convert the point / line light source into a uniform surface light source, which is then projected out through the outer shell.

[0011] By arranging several light sources circumferentially, the light sources form continuous or nearly continuous light-emitting points in the circumferential direction. After the light emitted is diffused by the light-diffusing component, a uniform light band without dark areas or bright spots can be formed, thereby avoiding local over-brightness or uneven brightness, and enhancing the high-end feel and visual consistency of the product.

[0012] As a further improvement of this utility model, the light-diffusing component has a first wall and a second wall at one end near the connecting end. The first wall and the second wall are spaced apart in the radial direction to form the receiving groove. The light source is disposed on the side of the carrier away from the first wall so that the light emitted is directed toward the second wall.

[0013] Thus, by forming a receiving groove by setting the first and second walls at intervals in the radial direction, a double-sided mechanical constraint is formed on the light-emitting element, reducing the possibility of displacement of the light-emitting element in the radial direction due to vibration or assembly stress. At the same time, it can eliminate the need for an independent support and fixing structure and reduce the assembly of additional parts. Moreover, the double-wall labyrinth sealing structure formed by the first and second walls can also significantly increase the difficulty of foreign objects entering the receiving groove, thereby improving the dustproof and waterproof effect. By setting the light source on the side of the carrier away from the first wall, the light emitted away from the first wall accounts for only a very small portion of the total light, and this back-emitted light can be effectively absorbed by the low-transmittance first wall, thereby minimizing stray light directly emitted outward.

[0014] As a further improvement of this utility model, the light-diffusing component is further provided with a main body, the first wall portion and the second wall portion extend from the main body portion in the same direction, and the first wall portion is located radially outside the second wall portion, and the light transmittance of the first wall portion is less than the light transmittance of the main body portion and the second wall portion.

[0015] In this way, the first wall absorbs or blocks the strong light from the light source directly hitting the outer shell, forming an absorption barrier on the radially outer side, capturing the residual light that tries to directly hit the outer shell, thereby reducing "light pollution" caused by light leakage on the radially outer side; the second wall and the main body serve as light transmission channels, which can efficiently conduct the light emitted by the light source and ensure the maximization of light flux in the light path.

[0016] As a further improvement of this utility model, the carrier is fixed in the receiving groove, and the thickness of the carrier in the radial direction is less than its extension length in the axial direction of the rear cover assembly.

[0017] In this way, the light-emitting element is fixed in the receiving groove by the carrier. By setting the carrier as a thin sheet structure that extends in the axial direction, its space occupied by the receiving groove is reduced, the volume of the light-emitting element in the radial direction is reduced, thereby miniaturizing the radial dimension of the back cover assembly.

[0018] As a further improvement of this utility model, the carrier is an annular strip structure, the receiving groove is annular, and the radial outer surface of the carrier is adhered to the first wall portion.

[0019] In this way, the light source can be arranged reasonably through the ring-shaped strip carrier, and the installation steps can be simplified; by adhering the radial outer surface of the carrier to the first wall, the assembly efficiency can be improved and the assembly difficulty can be reduced.

[0020] As a further improvement of this utility model, the outer shell is semi-transparent and is arranged around the radial outer side of the light-diffusing component. The outer shell has a buckle portion and a limiting portion for detachably connecting with the cylinder. The limiting portion is open in the direction close to the connecting end to restrict the movement of the outer shell in the circumferential direction, and the buckle portion is used to restrict the movement of the outer shell in the axial direction.

[0021] In this way, the light emitted by the light-emitting component passes through the light-diffusing component and then shines out through the outer shell. The semi-transparent outer shell serves as the final light outlet, further ensuring that the light is emitted evenly and softly over a large area, forming a "halo" effect, thereby enhancing the visual aesthetics and technological feel.

[0022] The limiting part achieves initial positioning between the outer shell and the cylinder to restrict the movement of the outer shell in the circumferential direction; the snap-fit ​​part achieves interlocking and fixing between the outer shell and the cylinder to restrict the displacement of the outer shell along the axis of the blower and prevent the outer shell from loosening or falling off; at the same time, the "detachable" snap-fit ​​design enables quick disassembly and convenient maintenance.

[0023] As a further improvement of this utility model, the rear cover assembly also has a flow guide connected to the light-diffusing component and an air inlet located radially inside the light-diffusing component. The flow guide has a connecting wall and a connecting wall connected to each other. The connecting wall is located on the side of the light-diffusing component near the connecting end and covers the opening end of the receiving groove. The connecting wall is located radially inside the light-diffusing component to be connected to the air inlet.

[0024] In this way, by using the guide to cover the opening of the receiving slot, external interference is isolated, preventing external dust / moisture from entering the interior of the light homogenizer, especially affecting optical components such as the light source; at the same time, it can force light to emerge only from the preset light-transmitting surface of the light homogenizer, ensuring ideal light path output and avoiding stray light from affecting the uniformity of light.

[0025] This utility model also provides a hair dryer, which includes a cylindrical body with an air outlet end and the aforementioned rear cover assembly, wherein the rear cover assembly is connected to the side of the cylindrical body away from the air outlet end.

[0026] In this way, the light emitted by the light-emitting element inside the back cover assembly shines into the interior of the back cover assembly, rather than directly towards the rear of the back cover assembly. This prevents the light from being directly seen into the user's eyes and avoids glare. At the same time, it also prevents light from leaking out from the connection points, thus allowing the hair dryer to present a better visual effect.

[0027] The beneficial effects of this utility model are as follows: The back cover assembly and the hair dryer of this utility model direct the light emitted by the light-emitting element towards the radially inward side of the back cover assembly or towards the side near the connecting end, rather than directly towards the rear of the back cover assembly. This prevents the light emitted by the light-emitting element from being directly seen and shining into the user's eyes, avoiding glare and preventing light leakage from the connecting part. In addition, after the light emitted by the light-emitting element is homogenized and softened by the light-diffusing component, the "glaring" or "grainy" light spots caused by point light sources can be eliminated, resulting in softer light and thus allowing the back cover assembly to present a better visual effect. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the hair dryer of this utility model; Figure 2 yes Figure 1 A partially exploded view of the hair dryer shown. Figure 3 yes Figure 2 The hair dryer shown is viewed from another angle; Figure 4 yes Figure 1 A 3D assembly diagram of the back cover assembly of the hair dryer shown. Figure 5 yes Figure 2 The diagram shows the assembly of the light-emitting component and the light-diffusing component of the hair dryer. Figure 6 It is along Figure 5 A cross-sectional view of the centerline AA; Figure 7 yes Figure 1 The image shows a cross-sectional view of the hair dryer along line BB after the handle has been removed.

[0029] In the picture: 1000, Hair dryer; 100. Rear cover assembly; 101. Connecting end; 12. Light-emitting component; 121. Carrier; 123. Light source; 13. Beam leveling component; 130. Receiving groove; 131. First wall portion; 132. Second wall portion; 134. Main body portion; 14. Outer shell; 141. Buckling part; 142. Limiting part; 15. Flow guide; 151. Connecting wall; 152. Joint wall; 16. Air inlet components; 17. Sunshade; 200. Cylinder body; 201. Air outlet; 202. Protrusion; 203. Snap-on protrusion. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0031] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0032] Figures 1 to 7 The diagram shows an embodiment of the rear cover assembly 100 and the hair dryer 1000 of this utility model. In this utility model, the rear cover assembly 100 of the hair dryer has a connecting end 101 for connecting to the barrel 200 of the hair dryer 1000, and includes a light-emitting element 12, a light-diffusing element 13 for softening the light emitted by the light-emitting element 12, and a housing 14. In this embodiment, the housing 14 is disposed outside the light-diffusing element 13 to project the light processed by the light-diffusing element 13 outward.

[0033] The light emitted by the light-emitting element 12 is directed toward the radially inner side of the rear cover assembly 100 or toward the side close to the connection end 101.

[0034] In this way, the light emitted by the light-emitting element 12 is directed towards the radially inward side of the back cover assembly 100 or towards the side closer to the connection end 101, rather than directly towards the rear of the back cover assembly 100. This ensures that the light emitted by the light-emitting element 12 is directed towards the internal space of the back cover assembly, preventing it from being directly seen and shining into the user's eyes, thus avoiding glare and preventing light leakage from the connection point. In addition, after the light emitted by the light-emitting element 12 is homogenized and softened by the light-diffusing element 13, the "glaring" or "grainy" light spots caused by point light sources can be eliminated, resulting in softer light and allowing the back cover assembly 100 to present a better visual effect.

[0035] In the illustrated embodiment, the light emitted by the light-emitting element 12 is directed toward the radially inner side of the rear cover assembly 100; in other embodiments, the light emitted by the light-emitting element 12 may also be directed toward the side near the connecting end 101, that is, toward the air outlet end of the barrel 200 near the hair dryer 1000, which may be parallel to the axial direction of the barrel 200 or at an angle to the axial direction of the barrel 200.

[0036] In this embodiment, the light-emitting element 12 has a carrier 121 and a light source 123 disposed on the carrier 121. The light source 123 is disposed on the radially inner side of the carrier 121 or on the side close to the connecting end 101.

[0037] Thus, by placing the light source 123 on the carrier 121, it facilitates the integration and installation of the light source 123 with other electronic devices. By placing the light source 123 on the radially inner side of the carrier 121 or on the side close to the connection end 101, the light emitted by the light source 123 is mainly directed towards the internal radial center or axial depth of the rear cover assembly 100, that is, towards the inside of the cylinder 200. This prevents the light from directly shining into the user's eyes from the rear end or side of the rear cover assembly 100, avoiding glare and improving safety and visual comfort. At the same time, it can more effectively utilize the light guiding, scattering and uniform light characteristics of the light-diffusing component 13 to convert the point / line light source into a uniform surface light source, which is then projected out through the outer casing 14.

[0038] In the illustrated embodiment, the light source 123 is disposed radially inside the carrier 121. At this time, depending on the installation angle of the light source 123 relative to the carrier 121, the light emitted by the light source 123 can be directed towards the radially inside the rear cover assembly 100, or it can be at an angle to the radial direction of the rear cover assembly 100, that is, towards the side close to the connection end 101 of the rear cover assembly 100.

[0039] In other embodiments, the light source 123 may also be disposed on the side of the carrier 121 near the connection end 101, so that the light emitted is directed toward the side near the connection end 101 of the rear cover assembly 100 or toward the radially inner side of the rear cover assembly 100.

[0040] In this embodiment, the light-emitting element 12 is provided with a plurality of light sources 123 arranged in the circumferential direction.

[0041] In this way, by arranging several light sources 123 in the circumferential direction, the light sources 123 form continuous or nearly continuous light-emitting points in the circumferential direction. After the light emitted by them is diffused by the light-diffusing component 13, a uniform light band without dark areas or bright spots can be formed, thereby avoiding local over-brightness or uneven brightness, so as to enhance the high-end feel and visual consistency of the product.

[0042] In this embodiment, the light-diffusing element 13 is provided with a receiving groove 130. The receiving groove 130 is formed by recessing from the side of the light-diffusing element 13 near the connecting end 101 toward the direction away from the connecting end 101, and the light-emitting element 12 is received in the receiving groove 130.

[0043] Thus, the receiving groove 130 provides installation space for the light-emitting element 12, and the physical constraint of the groove wall of the receiving groove 130 ensures the radial and axial position of the light-emitting element 12, eliminating the need for additional support and positioning structures, preventing the light-emitting element 12 from loosening due to vibration during the operation of the blower 1000, and improving the reliability of long-term use; at the same time, the enclosing structure of the receiving groove 130 can also form a physical barrier between the light-emitting element 12 and the external environment, reducing the direct contact of dust / moisture with the light source or circuit, thereby extending the service life of the light-emitting element 12.

[0044] The light-diffusing component 13 has a first wall portion 131 and a second wall portion 132 at one end away from the air inlet end 101. The first wall portion 131 and the second wall portion 132 are arranged at intervals in the radial direction to form the receiving groove 130.

[0045] Thus, by forming the receiving groove 130 by the first wall portion 131 and the second wall portion 132 spaced apart in the radial direction, a double-sided mechanical constraint is formed on the light-emitting element 12, which reduces the possibility of displacement of the light-emitting element 12 in the radial direction due to vibration or assembly stress. At the same time, it can eliminate the need for an independent support and fixing structure and reduce the assembly of additional parts. Moreover, the double-wall labyrinth sealing structure formed by the first and second wall portions 131 and 132 can also greatly increase the difficulty of foreign objects entering the receiving groove 130, thereby improving the dustproof and waterproof effect.

[0046] The light-diffusing component 13 is further provided with a main body portion 134, the first wall portion 131 and the second wall portion 132 extend from the main body portion 134 in the same direction, and the first wall portion 131 is located radially outside the second wall portion 132, and the light transmittance of the first wall portion 131 is less than the light transmittance of the main body portion 134 and the second wall portion 132.

[0047] Thus, the first wall portion 131 absorbs or blocks the strong light from the light source 123 directly hitting the outer casing 14, forming an absorption barrier on the radially outer side, capturing the residual light that attempts to directly hit the outer casing 14, thereby reducing "light pollution" caused by light leakage on the radially outer side; the second wall portion 132 and the main body portion 134 serve as light transmission channels, which can efficiently conduct the light emitted from the light source 123, ensuring the maximization of light flux in the light path.

[0048] In this embodiment, the radial thickness of the first wall portion 131 is smaller than the radial thickness of the second wall portion 132. Thus, the larger radial thickness of the second wall portion 132 increases the number of total internal reflections within the second wall portion 132, improving axial light guiding efficiency, while simultaneously widening the light diffusion angle, making the light entering the main body portion 134 more uniform; the smaller radial thickness of the first wall portion 131 reduces the obstruction of light at the edges of the main body portion 134, thereby improving edge brightness.

[0049] In this embodiment, the light source 123 is disposed on the side of the carrier 121 away from the first wall portion 131, so that the light emitted by it is directed toward the second wall portion 132.

[0050] Thus, by placing the light source 123 on the side of the carrier 121 away from the first wall portion 131, only a very small portion of the total light is emitted away from the first wall portion 131, and these back-emitted light rays can be effectively absorbed by the low-transmittance first wall portion 131, thereby minimizing stray light from being emitted directly outward.

[0051] The carrier 121 is fixed inside the receiving groove 130, and the thickness of the carrier 121 in the radial direction is less than its extension length in the axial direction of the rear cover assembly 100.

[0052] Thus, the light-emitting element 12 is fixed in the receiving groove 130 by the carrier 121. By setting the carrier 121 as a thin sheet structure extending in the axial direction, its space occupation in the receiving groove 130 is reduced, the volume of the light-emitting element 12 in the radial direction is reduced, thereby miniaturizing the radial dimension of the back cover assembly 100.

[0053] The carrier 121 is an annular strip structure, the receiving groove 130 is annular, and the radial outer surface of the carrier 121 is adhered to the first wall portion 131. This ensures that the extending direction of the carrier 121 is parallel to the axial direction of the rear cover assembly 100.

[0054] In this way, the light source 123 is arranged reasonably through the annular strip carrier 121, and the installation steps are simplified; by adhering the radial outer surface of the carrier 121 to the first wall portion 131, the assembly efficiency is improved and the assembly difficulty is reduced.

[0055] In other embodiments of this utility model, the carrier 121 may also be a discontinuously arranged sheet structure. In this case, the light-diffusing component 13 is provided with a plurality of receiving slots 130 to correspondingly receive a plurality of the carriers 121.

[0056] In this embodiment, the outer shell 14 is semi-transparent and is arranged radially outside the light-diffusing element 13.

[0057] In this way, the light emitted by the light-emitting element 12 passes through the light-diffusing element 13 and then shines out through the outer shell 14. The semi-transparent outer shell 14 serves as the final light outlet, further ensuring that the light is emitted evenly and softly over a large area, forming a "halo" effect, thereby enhancing the visual aesthetics and technological feel.

[0058] In other embodiments, the outer shell 14 may also be disposed at one end of the rear cover assembly 100 in the axial direction, that is, at the end opposite to the connecting end 101 in the axial direction. In this case, the outer shell 14 is located on the outer side of the light-diffusing element 13 in the axial direction.

[0059] In this embodiment, the outer shell 14 has a snap-fit ​​portion 141 for detachably connecting to the cylindrical body 200 and a limiting portion 142. The limiting portion 142 is opened toward the connection end 101 to restrict the movement of the outer shell 14 in the circumferential direction, and the snap-fit ​​portion 141 is used to restrict the movement of the outer shell 14 in the axial direction.

[0060] Thus, the limiting part 142 achieves the initial positioning between the outer shell 14 and the cylindrical body 200, thereby limiting the movement of the outer shell 14 in the circumferential direction; the snap-fit ​​part 141 achieves the interlocking and fixing between the outer shell 14 and the cylindrical body 200, thereby limiting the displacement of the outer shell 14 along the axis of the blower 1000 and preventing the outer shell 14 from loosening or falling off; at the same time, the "detachable" snap-fit ​​design enables quick disassembly and convenient maintenance.

[0061] In this embodiment, the limiting part 142 is a groove-shaped structure formed by recessing from one end of the outer shell 14 near the connecting end 101 toward the direction away from the connecting end 101. It cooperates with the protrusion 202 provided inside the cylinder 200 to restrict the circumferential rotation of the outer shell 14 and prevent the outer shell 14 from deflecting due to motor vibration. The latching part 141 is a latching groove formed on the outer peripheral surface of the outer shell 14. It cooperates with the latching protrusion 203 provided inside the cylinder 200 to restrict the position of the outer shell 14 in the axial direction.

[0062] In some embodiments, the rear cover assembly 100 further includes a flow guide 15 connected to the light-diffusing element 13 and an air inlet 16 located radially inside the light-diffusing element 13. The flow guide 15 has a connecting wall 151 and a connecting wall 152 connected to each other. The connecting wall 151 is located on the side of the light-diffusing element 13 near the connecting end 101 and covers the opening end of the receiving groove 130. The connecting wall 152 is located radially inside the light-diffusing element 13 to be connected to the air inlet 16.

[0063] In this way, the guide member 15 covers the opening end of the receiving groove 130, thereby isolating external interference and preventing external dust / moisture from entering the interior of the light homogenizer 13, especially affecting optical components such as light sources; at the same time, it can force light to be emitted only from the preset light-transmitting surface of the light homogenizer 13, ensuring ideal light path output and avoiding stray light from affecting the uniformity of light.

[0064] In this embodiment, the rear cover assembly 100 also has a light shield 17 located radially inside the housing 14.

[0065] The hair dryer 1000 includes a cylindrical body 200 having an air outlet 201 and a rear cover assembly 100, the rear cover assembly 100 being connected to the side of the cylindrical body 200 away from the air outlet 201.

[0066] In summary, the back cover assembly 100 and the hair dryer 100 of this utility model, by setting the light emitted by the light-emitting element 12 to face the radially inward side of the back cover assembly 100 or the side near its connecting end 101, and not directly towards the rear of the back cover assembly 100, ensure that the light emitted by the light-emitting element 12 is not directly seen and shines into the user's eyes, thus avoiding glare and preventing light leakage from the connecting part. In addition, after the light emitted by the light-emitting element 12 is homogenized and softened by the light-diffusing element 13, the "glaring" or "grainy" light spots caused by point light sources can be eliminated, thus becoming a softer light, thereby enabling the back cover assembly 100 to present a better visual effect.

[0067] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0068] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A rear cover assembly of a hair dryer having a connecting end to be connected to a barrel of the hair dryer, and comprising a light emitting member, a light homogenizing member for homogenizing light emitted from the light emitting member, and an outer housing provided outside the light homogenizing member to project the light homogenized by the light homogenizing member outwardly, characterized in that, The light emitted by the light-emitting element is directed towards the radially inner side of the rear cover assembly or towards the side closer to the connection end.

2. The back cover assembly of a hair dryer according to claim 1, wherein The light-diffusing element is provided with a receiving groove, which is formed by recessing from the side of the light-diffusing element near the connecting end toward the direction away from the connecting end, and the light-emitting element is received in the receiving groove.

3. The back cover assembly of a hair dryer according to claim 2, wherein The light-emitting element has a carrier and a light source disposed on the carrier. The light source is disposed on the radial inner side of the carrier or on the side near the connecting end. The light-emitting element has a plurality of light sources arranged in a circumferential direction.

4. The rear cover assembly of the hair dryer according to claim 3, characterized in that, The light-diffusing component has a first wall and a second wall at one end near the connecting end. The first wall and the second wall are spaced apart in the radial direction to form the receiving groove. The light source is located on the side of the carrier away from the first wall so that the light emitted is directed toward the second wall.

5. The back cover assembly of a hair dryer according to claim 4, wherein, The light-diffusing component also includes a main body, a first wall portion and a second wall portion extending from the main body in the same direction, and the first wall portion being located radially outside the second wall portion, and the light transmittance of the first wall portion being less than that of the main body portion and the second wall portion.

6. The back cover assembly of the hair dryer of claim 4, wherein, The carrier is fixed within the receiving groove, and the thickness of the carrier in the radial direction is less than its extension length in the axial direction of the rear cover assembly.

7. The back cover assembly of a hair dryer according to claim 6, wherein The carrier is a ring-shaped strip structure, the receiving groove is ring-shaped, and the radial outer surface of the carrier is adhered to the first wall portion.

8. The back cover assembly of a hair dryer according to claim 1, wherein, The outer shell is semi-transparent and surrounds the radially outer side of the light-diffusing component. The outer shell has a snap-fit ​​portion for detachably connecting to the cylindrical body and a limiting portion. The limiting portion is open towards the direction near the connecting end to restrict the movement of the outer shell in the circumferential direction, and the snap-fit ​​portion is used to restrict the movement of the outer shell in the axial direction.

9. The back cover assembly of a hair dryer according to claim 2, wherein, The rear cover assembly also has a flow guide connected to the light-diffusing element and an air inlet located radially inside the light-diffusing element. The flow guide has a connecting wall and a connecting wall connected to each other. The connecting wall is located on the side of the light-diffusing element near the connecting end and covers the opening end of the receiving groove. The connecting wall is located radially inside the light-diffusing element to be connected to the air inlet.

10. A hair dryer characterized by It includes a cylinder having an air outlet and a rear cover assembly according to any one of claims 1 to 9, the rear cover assembly being connected to the side of the cylinder away from the air outlet.

Images