CN219679983U - Air duct rear cover assembly and blower - Google Patents

Abstract

The utility model discloses a rear cover component of an air duct, which is applied to an air blower and comprises a tail cover, an air guide ring and a luminous light source, wherein the luminous light source is arranged towards the air guide ring, the air guide ring is used for receiving and transmitting light signals emitted by the luminous light source, the light transmittance of the tail cover is smaller than that of the air guide ring, an installation position penetrating through the tail cover is arranged on the tail cover, the air guide ring is arranged in the installation position, and at least part of the air guide ring is exposed to the outer surface of the rear cover component of the air duct through the installation position and is used for transmitting the light signals outwards. In the above arrangement, the air outlet temperature of the blower can be displayed more clearly through the air guide ring, and the structural compactness of the blower is improved.

Description

Air duct rear cover assembly and blower

Technical Field

The utility model relates to the field of blowers, in particular to a rear cover assembly of a blower and the blower.

Background

The hair drier is a haircut tool, mainly used for drying and shaping hair, but also can be used for local drying, heating and physiotherapy in the aspects of laboratory, physiotherapy room, industrial production, art designing and the like. The hair-dryer all provides the different temperatures of blowing of different gears usually, but the temperature display structure of current hair-dryer sets up temperature gear sign usually on the handle, and the user distinguishes through observing the temperature gear, but because gear sign arranges compactly, easily distinguishes easily with the eye, brings the inconvenience for the user.

Disclosure of Invention

Accordingly, the present utility model is directed to a rear cover assembly for a dryer, which can improve the compactness of the dryer while clearly displaying the temperature of the air discharged from the dryer.

In a first aspect of the present utility model, there is provided a dryer back cover assembly for a hair dryer, the dryer back cover assembly comprising a tail cover, an aperture, and a light source;

the luminous light source is arranged towards the light guide ring, and the light guide ring is used for receiving and transmitting light signals emitted by the luminous light source;

the light transmittance of the tail cover is smaller than that of the light guide ring, the tail cover is provided with a mounting position penetrating through the tail cover, the light guide ring is arranged in the mounting position, and at least part of the light guide ring is exposed to the outer surface of the air duct rear cover assembly through the mounting position and used for conducting the light signals outwards.

Further, the air duct rear cover assembly further comprises a tail cover plate, and the tail cover plate covers one end of the diaphragm, which is exposed through the installation position;

the light transmittance of the tail end cover plate is smaller than that of the light guide ring.

Further, the light guide ring is made of a light-transmitting material or a light guide material;

the tail cover and the tail cover plate are made of opaque materials, or the surfaces of the tail cover and the tail cover plate are provided with opaque coatings.

Further, the air duct rear cover assembly further comprises a light guide cover, the light guide cover is made of light-transmitting materials, the light guide ring is fixedly arranged on the light guide cover, the tail cover comprises a tail cover end face and a tail cover side wall, the installation position is arranged on the tail cover end face, the tail cover side wall surrounds the periphery of the light guide cover, the tail cover side wall and the tail cover end face enclose an accommodating space, and the light guide cover is located in the accommodating space.

Further, the tail cover side wall extends from the outer edge of the tail cover end face to the direction pointing to the luminous light source;

the tail cover end face is sunken towards the extending direction of the tail cover side wall, the installation position is arranged at the deepest sunken position of the tail cover end face, the installation position is sleeved on the light guide ring, and the light guide ring extends out from the installation position towards the direction far away from the luminous light source.

Further, the plane of the tail cover plate coincides with the plane of the outer edge of the tail cover end face.

Further, the air duct rear cover assembly further comprises a circuit control board, the circuit control board is fixedly connected with the light guide cover, the luminous light source is fixedly arranged on the circuit control board, and the luminous light source abuts against the light guide ring, or the luminous light source faces the light guide ring and is arranged with the light guide ring at intervals.

In a second aspect of the present utility model, there is provided a hair dryer comprising a dryer housing and a dryer back cover assembly according to the first aspect of the present utility model, the dryer housing comprising a front end and a rear end, the front end of the dryer housing being adapted to form an air outlet of the hair dryer, the dryer back cover assembly being fixedly connected to the dryer housing rear end.

Further, at least a portion of the diaphragm is exposed to an outer surface of the blower when the rear duct cover assembly is secured to the blower housing.

Further, a sealing piece is arranged at the joint of the air duct shell and the air duct rear cover assembly.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

in the arrangement, the air-permeable ring is arranged on the air duct rear cover assembly, different air outlet temperatures of the blower are displayed through the light transmission of the light-permeable ring, so that a user can observe the air outlet temperatures conveniently, and the observation is facilitated due to the large range of the ring; and the diaphragm is arranged on the rear cover component of the air duct, and the structure is utilized to have the functions of the diaphragm and the rear cover component, so that the compactness of the structure of the air blower is improved.

Drawings

Fig. 1 is a schematic perspective view of a rear cover assembly of a wind turbine in this embodiment.

Fig. 2 is an exploded view of the rear cap assembly of the cartridge in this embodiment.

Fig. 3 is a schematic view of the structure of the blower in this embodiment.

Fig. 4 is a schematic perspective view of the blower in this embodiment.

Fig. 5 is a schematic view of the structure of the tail cap in the present embodiment.

Description of the reference numerals

Blower 10, duct rear cover assembly 100, rear cover 110, aperture 120, aperture rear end 121, light source 130, mounting location 111, rear cover plate 140, light guide cover 150, rear cover end 112, rear cover side wall 113, circuit control board 160, duct housing 200, front end 210, rear end 220, air outlet 230, first seal 301, second seal 302, pressure ring 151, first annular groove 1121, second annular groove 1122.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The manner described in the following exemplary embodiments does not represent all manners consistent with the present utility model. Rather, they are merely examples of apparatus consistent with aspects of the utility model as detailed in the accompanying claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and the terms "a" and "an" are used individually. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

The normal hair-dryer can set up different switch gears when the during operation to make different gears correspond different air-out temperatures respectively, want to know air-out temperature when the user is in use, can only observe the gear of hair-dryer usually, thereby judge what kind of temperature that the current gear corresponds. In this case, even if the indication lamp is provided at the position of the gear adjustment for the convenience of the user's observation, the indication lamp has a small indication range, and the user cannot clearly observe the specific light display during the use, thereby causing inconvenience to the user.

In view of this, the present embodiment discloses a rear cover assembly for a blower, and referring to fig. 1 and 2, the rear cover assembly 100 includes a tail cover 110, a light guide ring 120, and a light emitting source 130, the light emitting source 130 is disposed toward the light guide ring 120, and the light guide ring 120 is capable of receiving and transmitting a light signal emitted from the light emitting source 130. Wherein, the transmittance of the tail cover 110 is smaller than that of the light guide ring 120, the tail cover 110 is provided with a mounting position 111 penetrating through the tail cover 110, the light guide ring 120 is arranged in the mounting position 111, and at least part of the light guide ring 120 can be exposed to the outer surface of the air duct rear cover assembly 100 through the mounting position 111 for conducting light signals outwards.

In this embodiment, the light guide ring can transmit or conduct the light emitted by the light source 130, and specifically, the light guide ring 120 is made of a light-transmitting material, or the light guide ring 120 is made of a light-guiding material. The light-transmitting material may be any transparent or semitransparent material, and only needs to enable light to transmit through the light guide ring 120, and the light guide ring 120 can be observed on the side far away from the light source; the light guide material is a material having a relatively high refractive index and not absorbing light, such as a light guide plate, which is capable of transmitting the characteristics of the material itself, conducting the light source to the outer surface by reflection or refraction away, and emitting light as uniformly as possible on the outer surface thereof. In the present utility model, there is no limitation on the material of the diaphragm 120, but the transmittance of the tail cover 110 is smaller than that of the diaphragm 120, so that even if the tail cover 110 can project light outward, the brightness thereof is smaller than that of the diaphragm 120. By the arrangement, the light guide ring 120 can emit light more obviously relative to the tail cover 110, so that a user can observe the light emitting condition more clearly.

And, the specific implementation manner of the installation position 111 provided on the tail cover 110 in this embodiment is: a through hole is provided in the center of the tail cover 110 as the mounting location 111 of the diaphragm 120, and the diaphragm 120 passes through the through hole, and the diaphragm 120 is exposed to the outer surface of the duct rear cover assembly 100 through the portion of the tail cover 110 protruding from the mounting location 111.

So set up, set up the air guide ring 120 on the dryer back cover subassembly 100 of hair-dryer 10 to set up to wear out from the centre of tail cap 110, when need not to increase the volume of hair-dryer 10 and add this structure, realized letting the user clearly observe the function of air-out temperature condition behind the dryer back cover subassembly 100 outside, also promoted the compactification of structure of this dryer back cover subassembly 100.

The light guide ring 120 is adopted to transmit light outwards, so that the light emitting range is large, the observation of a user is convenient, and the light emitting component for displaying the air outlet temperature is combined with the air duct rear cover component 100 of the blower 10, so that the volume of the original structure of the blower 10 is not increased, and the structural compactness of the blower 10 is improved.

Since the light source generally adopts a plurality of individual light-emitting sources 130, for example, in this embodiment, the light-emitting sources 130 adopt light-emitting diodes, and the light signal emitted by the light-emitting sources 130 is transmitted by the light-guiding ring 120, on one hand, compared with the plurality of individual light-emitting sources 130, the light is transmitted through the light-guiding ring 120, so that the light scattering is more uniform, on the other hand, the light-emitting range is also wider, and the user can observe the light-emitting condition more easily.

In addition, as shown in fig. 3 and 4, the present embodiment further discloses a blower 10, where the blower 10 includes an air outlet 230, a blower housing 200, and the blower rear cover assembly 100, the blower housing 200 includes a front end 210 and a rear end 220, and the air outlet 230 is connected to the front end 210 of the blower housing 200, and the blower rear cover assembly 100 is connected to the rear end 220 of the blower housing 200.

Therefore, when the air duct rear cover assembly 100 is mounted on the blower 10, the air duct rear cover assembly 100 is buckled at the rear end 220 of the air duct housing 200 to form the rear end 220 of the air duct housing 200 of the blower 10, at this time, the diaphragm 120 on the air duct rear cover assembly 100 can be observed from the outside of the blower 10 by a user when the blower 10 is in normal use, the light source 130 in the blower 10 can be controlled by the circuit to emit light with different colors, at this time, the diaphragm 120 can emit light with different colors, so as to be used for indicating different air outlet temperatures of the blower 10, and the user can know the current air outlet temperature of the blower 10 by only observing the color of the diaphragm 120, so that the user can use the air duct more conveniently.

With continued reference to fig. 2, the rear duct cover assembly 100 further includes a rear cover 140, wherein the rear cover 140 covers an end of the diaphragm 120 exposed through the mounting portion 111, and a light transmittance of the rear cover 140 is less than a light transmittance of the diaphragm 120. That is, the tail cover 140 covers the end of the diaphragm 120 protruding from the mounting location 111 of the tail cover 110 and exposed to the outer surface side of the duct rear cover assembly 100, and thus it can block the light-transmitting ray of the diaphragm rear end surface 121 of the diaphragm 120 protruding from the mounting location 111 and away from one end of the mounting location 111.

In summary, the portion of the diaphragm 120 exposed outside the duct rear cover assembly 100 extends from the mounting location 111 to the junction with the tail cover 140. In this embodiment, the transmittance of the tail cover plate 140 is smaller than that of the diaphragm 120, so the light transmitted by the rear end face 121 of the diaphragm is blocked by the tail cover plate 140, and the transmittance is smaller than that of the diaphragm 120 itself, i.e. the range of the diaphragm 120 capable of transmitting light to the outside of the rear cover assembly 100 is also: from where it extends from the mounting location 111 to where it engages the trailing cover plate 140.

The light-emitting area of the diaphragm 120 is limited, and the two sides of the diaphragm 120 are made of opaque materials, so that the light-emitting part of the diaphragm 120 is more obvious and is convenient to observe; and, the end of the diaphragm 120 extending out of the mounting position 111 is closed by the tail cover 140, so that the tail end of the whole air duct rear cover assembly 100 is closed, and the air flow in the air blower 10 is not leaked when the air duct rear cover assembly is mounted on the air blower 10.

Preferably, in the present embodiment, the light guide ring 120 is made of a light-transmitting material or a light-guiding material, and the tail cover 110 and the tail cover plate 140 are made of a light-impermeable material, or the surfaces of the tail cover 110 and the tail cover plate 140 are provided with a light-impermeable coating. In this way, no matter the light guide ring 120 is made of a light-transmitting material or a light-guiding material, the light can be projected outwards, and the tail cover 110 or the tail cover plate 140 is made of a light-proof material or is provided with a light-proof coating, so that the light cannot be projected outwards, and the brightness difference between the light guide ring and the light guide ring 120 is larger, so that the user can more obviously observe the light projected by the light guide ring 120.

In this embodiment, the air duct rear cover assembly 100 further includes a light guide cover 150, the light guide ring 120 is disposed on the light guide cover 150, the tail cover 110 includes a tail cover end surface 112 and a tail cover side wall 113, the mounting position 111 of the light guide ring 120 is disposed on the tail cover end surface 112, the tail cover side wall 113 and the tail cover end surface 112 enclose an accommodating space, and the light guide cover 150 is disposed in the accommodating space.

Preferably, the light guide cover 150 and the light guide ring 120 may be integrally formed and each may be made of a light guide material or a light transmitting material, wherein the light guide cover 150 is substantially planar, and the light guide ring 120 is disposed vertically on the plane of the light guide cover 150. The light guide cover 150 is approximately parallel to the outer edge of the tail cover end face 112, the tail end side wall surrounds the mounting plane and is surrounded by the tail cover side wall 113 of the tail cover 110, the light guide cover 150 is located in the accommodating space surrounded by the tail cover side wall 113 and the tail cover end face 112 and abuts against the tail cover end face 112, and the light guide ring 120 is fixed with the light guide cover 150 and is located in the mounting position 111 formed on the tail cover 110.

So set up, light guide cover 150 and light guide aperture 120 integrated into one piece can be convenient for install, simplify the installation flow to make the structure simplify more. In addition, the light guide cover 150 abutting against the end face 112 of the tail cover can fix the position of the light guide ring 120, and meanwhile, the light guide cover has the functions of connection and positioning, and the structure is further simplified.

Specifically, the tail cap side wall 113 is formed to extend from the outer edge of the tail cap end face 112 toward the direction toward the light emitting source 130, the tail cap end face 112 is recessed toward the extending direction of the tail cap side wall 113, and the mounting position 111 for mounting the diaphragm 120 is provided at the deepest of the recess of the tail cap end face 112 and is fitted over the diaphragm 120, and the diaphragm 120 protrudes from the mounting position 111 toward the direction away from the light emitting source 130.

In this embodiment, since the light guide ring 120 is vertically disposed on the light guide cover 150, and the outer edge of the end face 112 of the tail cover is substantially parallel to the light guide cover 150, the light guide ring 120 is also substantially perpendicular to the outer edge of the end face 112 of the tail cover, and extends from the mounting position 111 formed on the end face 112 of the tail cover, and the portion of the light guide ring 120 extending from the mounting position 111 is located outside the accommodation space surrounded by the side wall 113 of the tail cover and the end face 112 of the tail cover. Therefore, since the light guide cover 150 is located in the accommodating space of the tail cover 110, and the light guide degree of the tail cover side wall 113 is lower than that of the light guide cover 150 which is not blocked out of the tail cover 110, even if the light guide cover 150 is made of a light-transmitting material like the light guide aperture 120, the light transmitted by the light guide cover 150 is blocked by the tail cover side wall 113, the light transmitted by the light guide aperture 120 is not affected, and the light emission of the light guide aperture 120 can be clearly observed.

When the rear cover assembly 100 is mounted to the blower 10, the rear cover assembly 100 is integrally mounted to the rear end 220 of the blower case 200 of the blower 10, but the light-emitting source 130 is positioned closer to the front end 210 of the blower case 200 of the blower 10 than the rear cover end 112, and when the rear cover assembly 100 is mounted to the blower 10, the rear cover end 112 serves as the rear end of the blower case 200 of the blower 10. Wherein the diaphragm 120 protrudes from the mounting location 111 in the middle of the end face 112 of the tail cap, and the protruding portion extends away from the light source 130, i.e. away from the front end 210 of the duct housing 200. Thus, when the air duct rear cover assembly 100 is fixed to the air duct housing 200, at least a portion of the diaphragm 120 is exposed to the outer surface of the air blower 10, i.e., the portion of the diaphragm 120 exposed to the outer surface of the air duct rear cover assembly 100, and when the air duct rear cover assembly 100 is mounted to the air blower 10, it is still exposed to the outer surface of the air blower 10, so that the user can observe the light emission of the diaphragm 120 from the outside of the air blower 10.

Since the diaphragm 120 protrudes from the mounting position 111 of the end wall of the tail cover in the extending direction parallel to the extending direction of the side wall 113 of the tail cover and the extending direction of the side wall 113 of the tail cover is parallel to the axial direction of the blower case 200 of the blower 10, the extending direction of the diaphragm 120 is parallel to the axial direction of the blower case 200 of the blower 10. By this arrangement, the diaphragm 120 protrudes relative to the end face 112 of the tail cover, so that the diaphragm 120 protrudes toward the rear end 220 of the blower 10 along the axial direction of the blower housing 200 at the rear end 220 of the blower housing 200, which increases the volume of the blower 10 and is not beneficial to the realization of the compactness of the blower 10. Therefore, in the present embodiment, the end face 112 of the tail cover is recessed from the edge toward the center, and the recessed direction faces the direction in which the light-emitting source 130 is located, so that since the diaphragm 120 extends from the end face 112 of the tail cover to the deepest portion of the recess of the end face 112 of the tail cover, there is a superposition portion between the diaphragm 120 and the projection of the end face 112 of the tail cover in the vertical direction, not only the diaphragm 120 can be exposed to the outer surface of the blower 10, but also the dimension of the diaphragm 120 in the axial direction of the blower 10 along the blower housing 200 can be compressed, which is beneficial to the compactness of the structure of the blower 10.

Further, the plane of the tail cover plate 140 coincides with the plane of the outer edge of the tail cover end 112, so that the tail cover end 112 does not protrude toward the rear end 220 of the air duct housing 200 relative to the outer edge of the tail cover end 112 in the axial direction of the air duct housing 200, and therefore the diaphragm 120 protrudes from the deepest recess of the tail cover end 112, but the protruding portions are still in the space formed by the recess of the tail cover end 112. So arranged, the diaphragm 120 does not increase in size in the axial direction of the blower housing 200, resulting in a compact structure of the blower 10; on the other hand, the plane of the tail cover 140 coincides with the plane of the outer edge of the tail cover end face 112, and the plane serves as the plane of the rear end 220 of the blower housing 200 of the blower 10, which can also facilitate placement and storage of the blower 10.

Specifically, the air duct rear cover assembly 100 further includes a circuit control board 160, the circuit control board 160 is fixedly connected with the light guide cover 150, the light emitting source 130 is fixedly disposed on the circuit control board 160, and the light emitting source 130 abuts against the light guide ring 120, or the light emitting source 130 is disposed towards the light guide ring 120 and is spaced from the light guide ring 120. When the light-emitting source 130 abuts against the diaphragm 120, the loss of light emitted by the light-emitting source 130 can be reduced due to direct contact between the two, so that the light-emitting source 130 can be projected to the outside of the blower 10 by the diaphragm 120 as much as possible, and on the other hand, the volume of the blower 10 can be reduced, so that the overall structure is more compact; however, if the light-emitting source 130 is spaced from the aperture 120, the light emitted from the light-emitting source 130 can still be projected to the outside by the aperture 120 because the light-emitting source 130 is disposed towards the aperture 120, and the light-emitting source 130 is usually configured as a light-emitting diode and the like and is required to be soldered on the circuit board 160, and the soldering precision is usually difficult to ensure, so that when a certain spacing is kept between the light-emitting source 130 and the aperture 120, a certain tolerance is left for soldering of the light-emitting source 130, the requirement for precision of the soldering process is reduced, and rigid contact is avoided when the light-emitting source 130 abuts against the aperture 120 due to different heights of the light-emitting source 130 caused by soldering.

Referring to fig. 2 and 5, since the blower 10 needs to maintain an internal seal to avoid the generated air flow from leaking from the housing of the blower 10, a first seal 301 is disposed at the connection between the blower housing 200 and the blower rear cover assembly 100, and the specific mounting position 111 is that a first annular groove 1121 is disposed on the tail cover end surface 112, and the first seal 301 is disposed in the first annular groove 1121 and abuts against the blower housing 200. The first sealing member 301 is used for ensuring tightness between the air duct rear cover assembly 100 and the air duct housing 200 of the blower 10, and avoiding leakage of air flow from between the air duct housing 200 and the air duct rear cover assembly 100, thereby affecting normal air outlet of the air outlet 230 of the blower 10.

Further, a pressing ring 151 is vertically disposed on the light guide cover 150, and the pressing ring 151 is in the same extending direction as the light guide ring 120 and abuts against the end face 112 of the tail cover. Corresponding to the structure of the press ring 151, a second annular groove 1122 is provided on the end face 112 of the tail cap, and a second seal 302 is provided in the groove. The provision of the second sealing member 302 ensures tightness between the tail cover 110 and the light guide cover 150, further ensures tightness of the whole blower 10 when the rear cover assembly 100 of the air duct is assembled on the blower 10, and ensures that the blower 10 can normally discharge air.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the utility model.

Claims (10)

1. The air duct rear cover assembly is applied to the blower and is characterized by comprising a tail cover, an air guide ring and a luminous light source;

the luminous light source is arranged towards the light guide ring, and the light guide ring is used for receiving and transmitting light signals emitted by the luminous light source;

the light transmittance of the tail cover is smaller than that of the light guide ring, the tail cover is provided with a mounting position penetrating through the tail cover, the light guide ring is arranged in the mounting position, and at least part of the light guide ring is exposed to the outer surface of the air duct rear cover assembly through the mounting position and used for conducting the light signals outwards.

2. The duct rear cover assembly of claim 1, further comprising a tail cover plate covering an end of the diaphragm exposed by the mounting location;

the light transmittance of the tail end cover plate is smaller than that of the light guide ring.

3. The air duct rear cover assembly of claim 2, wherein the light guide ring is made of a light-transmitting material or a light-guiding material;

the tail cover and the tail cover plate are made of opaque materials, or the surfaces of the tail cover and the tail cover plate are provided with opaque coatings.

4. The air duct rear cover assembly of claim 3, further comprising a light guide cover made of a light-transmitting material, wherein the light guide ring is fixedly arranged on the light guide cover, the tail cover comprises a tail cover end face and a tail cover side wall, the mounting position is arranged on the tail cover end face, the tail cover side wall surrounds the periphery of the light guide cover, the tail cover side wall and the tail cover end face form an accommodating space, and the light guide cover is arranged in the accommodating space.

5. The duct rear cover assembly of claim 4, wherein the tail cover side wall extends from an outer edge of the tail cover end face in a direction toward the light emitting source;

the tail cover end face is sunken towards the extending direction of the tail cover side wall, the installation position is arranged at the deepest sunken position of the tail cover end face, the installation position is sleeved on the light guide ring, and the light guide ring extends out from the installation position towards the direction far away from the luminous light source.

6. The duct rear cover assembly of claim 5, wherein the plane of the tail cover plate coincides with the plane of the outer edge of the tail cover end face.

7. The air duct rear cover assembly of claim 4, further comprising a circuit control board fixedly connected to the light guide cover, wherein the light emitting source is fixedly disposed on the circuit control board and the light emitting source is abutted against the light guide ring, or wherein the light emitting source is disposed toward the light guide ring with a space therebetween.

8. A hair dryer, characterized in that the hair dryer comprises a dryer shell and a dryer back cover assembly according to any one of claims 1-7, wherein the dryer shell comprises a front end and a rear end, the front end of the dryer shell is used for forming an air outlet of the hair dryer, and the dryer back cover assembly is fixedly connected to the rear end of the dryer shell.

9. The blower of claim 8, wherein at least a portion of said diaphragm is exposed to an outer surface of said blower when said air duct rear cover assembly is secured to said air duct housing.

10. The blower of claim 8 wherein a seal is provided at the junction of said blower housing and said blower rear cover assembly.