hair dryer

Abstract

The present invention provides a hair dryer. The hair dryer utilizes technology capable of reducing noise generated by an accessory portion of the hair dryer. The hair dryer comprises: an operating lever extending in a front-to-rear direction; a rear housing provided at the rear of the operating lever and housing a prime mover; and an accessory portion detachably mounted to the front of the operating lever. The accessory portion comprises: an air supply duct housing a fan driven by the prime mover; an air intake duct provided at the rear of the air supply duct; and a nozzle provided at the front of the air supply duct. Sound-absorbing material is provided on the inner circumferential surface of the air intake duct.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a hair dryer. Background Art

[0002] Patent Document 1 discloses a hair dryer comprising: an operating lever extending in a front-to-rear direction; a rear housing located behind the operating lever and housing a prime mover; and an accessory unit detachably mounted to the front of the operating lever. The accessory unit comprises an air supply duct housing a fan driven by the prime mover; an air intake duct located at the rear of the air supply duct; and a nozzle located at the front of the air supply duct.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: U.S. Patent No. 6105206 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] It is generally desired to reduce the noise generated by a hair dryer. In the hair dryer of Patent Document 1, no consideration is given to reducing the noise generated by the attachment. In this specification, a technology is provided that can reduce the noise generated by the attachment of a hair dryer.

[0008] Solutions for solving problems

[0009] It can be that the hair dryer disclosed in this specification has: an operating rod extending in the front-to-back direction; a rear shell, which is arranged at the rear of the operating rod and accommodates the prime mover; and an accessory part, which is installed at the front of the operating rod in a detachable manner, and the accessory part has: an air supply duct, in which a fan driven by the prime mover is accommodated; an air intake duct, which is arranged at the rear of the air supply duct; and a nozzle, which is arranged at the front of the air supply duct, and a sound-absorbing material is provided on the inner circumferential surface of the air intake duct.

[0010] According to the above structure, the sound-absorbing material is provided on the inner circumference of the air intake duct. With this structure, the sound-absorbing material provided on the inner circumference of the air intake duct absorbs the noise generated by the air passing through the air intake duct. Therefore, the noise generated by the accessories of the hair dryer can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a left side view of the hair dryer 2 of this embodiment as viewed from the left side.

[0012] Figure 2 It is an exploded view of the hair dryer 2 of this embodiment.

[0013] Figure 3 It is an exploded view of the attachment portion 12 of this embodiment.

[0014] Figure 4 This is a perspective view of the air supply duct 100 of this embodiment as viewed from the left rear.

[0015] Figure 5 This is a perspective view of the air intake duct 150 of this embodiment as viewed from the left front.

[0016] Figure 6 This is a rear view of the intake duct 150 of this embodiment as viewed from the rear.

[0017] Figure 7 This is a rear view of the first cover 160 of this embodiment as seen from the rear.

[0018] Figure 8 This is a cross-sectional view of the hair dryer 2 according to the present embodiment as viewed from the left side.

[0019] Figure 9 1 is a diagram showing the electrical configuration of the hair dryer 2 according to this embodiment.

[0020] Figure 10 This is a left side view of the hair dryer 2 with the second cover 170 attached, as seen from the left side in this embodiment.

[0021] Description of Reference Numerals

[0022] 2. Hair dryer; 10. Main body; 12. Accessory; 20. Locking unit; 22. Connecting unit; 24. Locking lever; 26. Lock release button; 30. Operating lever; 32. First transmission shaft; 40. Ring handle; 50. Grip unit; 52. Grip rear housing; 54. Rod; 56. Operating unit; 58. Display unit; 60. Trigger; 70. Rear housing; 72. Motor; 74. Control board; 90. Nozzle; 100. Air supply pipe; 102. Adapter; 104. Cylindrical tube; 106. Front cylindrical tube; 108. Middle cylindrical tube; 110. Rear cylindrical tube Tube; 112, connecting rod fixing portion; 114, protrusion; 120, connecting rod; 120a, threaded hole; 122, second transmission shaft; 124, third transmission shaft; 130, front stationary blade; 134, fan cover; 136, rear stationary blade; 138, front moving blade; 140, rear moving blade; 142, fan; 150, intake duct; 152, slide groove; 154, protrusion; 156, sound-absorbing material; 160, first cover; 162, intake hole; 164, threaded hole; 166, connecting rod fixing portion; 166a, through hole; 168, threaded hole; 170, second cover. DETAILED DESCRIPTION

[0023] Representative and non-limiting examples of the present invention are described in detail below with reference to the accompanying drawings. This detailed description is intended only to provide those skilled in the art with details of preferred embodiments for implementing the present invention and is not intended to limit the scope of the present invention. Furthermore, the disclosed additional features and technical solutions can be used separately or in conjunction with other features and technical solutions to provide further improved hair dryers.

[0024] In addition, the combinations of features and steps disclosed in the following detailed description are not necessarily required to practice the present invention in the broadest sense, but are described only to specifically illustrate representative embodiments of the present invention. Furthermore, to provide additional and useful embodiments of the present invention, the various features of the following representative embodiments and the various features described in the claims do not necessarily need to be combined in the order in which they are described or enumerated herein.

[0025] All features described in this specification and / or claims are intended to be disclosed separately from the features described in the examples and / or claims as limitations of the disclosure of the original application and the specific matters described in the claims, and are disclosed individually and independently of each other. Furthermore, all numerical ranges and references to organizations or groups are intended to disclose intermediate structures therebetween as limitations of the disclosure of the original application and the specific matters described in the claims.

[0026] In one or more embodiments, the hair dryer may include: an operating rod extending in the front-to-back direction; a rear shell provided at the rear of the operating rod to accommodate the prime mover; and an accessory part installed at the front of the operating rod in a detachable manner, the accessory part including: an air supply duct in which a fan driven by the prime mover is accommodated; an air intake duct provided at the rear of the air supply duct; and a nozzle provided at the front of the air supply duct, wherein a sound-absorbing material is provided on the inner circumferential surface of the air intake duct.

[0027] In one or more embodiments, the sound absorbing material may extend along the axis of the operating rod on the inner circumferential surface of the air intake duct, and the axial length of the sound absorbing material may be in the range of 50 mm to 150 mm.

[0028] If the axial length of the sound-absorbing material is too short, the noise reduction effect of the material will be insufficient. On the other hand, if the axial length of the sound-absorbing material is too long, the axial length of the air intake pipe must also be long. In this case, the attachment becomes heavy, making it difficult for the user to operate. When the axial length of the sound-absorbing material is within the range of 50 mm to 150 mm, the noise reduction effect of the sound-absorbing material can be fully achieved while suppressing the weight of the attachment. This improves the user's convenience when using the hair dryer.

[0029] In one or more embodiments, the ratio of the diameter of the air intake duct to the axial length of the sound absorbing material may be in the range of 1.0 to 2.0.

[0030] According to the above structure, the noise generated by the air passing through the air intake duct can be effectively absorbed by the sound absorbing material, thereby further reducing the noise generated by the attachment part of the hair dryer.

[0031] In one or more embodiments, the intake duct may be detachably mounted on the air supply duct, and a first cover may be mounted on the rear portion of the intake duct. Alternatively, a second cover may be mounted on the rear portion of the air supply duct in place of the intake duct.

[0032] With this structure, users who wish to reduce the noise generated by the hair dryer's accessories can attach the intake duct to the rear of the air supply duct. On the other hand, users who prefer a lighter accessory can attach the second cover to the rear of the air supply duct instead of the intake duct. This allows users to choose whether to attach the intake duct to the rear of the air supply duct, thereby improving user convenience when using the hair dryer.

[0033] In one or more embodiments, the prime mover may be an electrically driven motor.

[0034] When the prime mover is an engine, the noise generated by the engine is relatively loud. In this case, even if the accessories generate noise, it will not significantly affect the noise generated by the hair dryer. On the other hand, when the prime mover is a motor, the noise generated by the motor is relatively low. In this case, if the noise generated by the accessories is relatively loud, it will have a significant impact on the noise generated by the hair dryer. According to the above structure, when the prime mover is a motor, the noise generated by the hair dryer can be reduced.

[0035] In one or more embodiments, the hair dryer may further include a battery pack that is detachably mounted on the rear housing and supplies power to the motor.

[0036] According to the above structure, the hair dryer may not have a power cord for obtaining power from the outside. Therefore, when the user uses the hair dryer, the power cord will not be an obstacle. Therefore, the user's operability of using the hair dryer can be improved.

[0037] In one or more embodiments, the thickness of the sound absorbing material may be in the range of 10 mm to 25 mm.

[0038] If the thickness of the sound-absorbing material is reduced, the noise reduction effect of the material will be insufficient. On the other hand, if the thickness of the sound-absorbing material is increased, the air supply path in the intake duct will become narrower, and the amount of air drawn into the intake duct will decrease. When the thickness of the sound-absorbing material is within the range of 10 mm to 25 mm, the noise reduction effect of the sound-absorbing material can be fully achieved, and the amount of air drawn into the intake duct can be kept appropriate.

[0039] (Example)

[0040] Reference Figures 1 to 9 , explain hair dryer 2. Figure 1 As shown, the hair dryer 2 includes a main body 10 and an attachment 12. Figure 1 、 Figure 2 As shown, the accessory 12 is detachably mounted on the main body 10. In addition, a different type of accessory from the accessory 12, for example, an accessory for a lawn mower, can be mounted on the main body 10.

[0041] like Figure 1 As shown, the main body 10 has a locking unit 20, an operating rod 30, a ring handle 40, a grip unit 50 and a rear housing 70. In the following description, the longitudinal direction of the operating rod 30 is referred to as the front-to-back direction. Figure 1 The up-down direction of the image is called the up-down direction, and the direction perpendicular to the front-back direction and the up-down direction is called the left-right direction.

[0042] The operating rod 30 has a hollow tubular shape and extends in a straight line. A locking unit 20 is provided at the front of the operating rod 30, and a grip unit 50 and a rear housing 70 are provided at the rear of the operating rod 30. A first transmission shaft 32 (see FIG. 1 ) is rotatably housed inside the operating rod 30. Figure 8 In the operating rod 30, a ring handle 40 for the operator to hold is provided between the locking unit 20 and the grip unit 50. The ring handle 40 is a hollow tube shape, formed in a ring shape that bulges upward and laterally from the operating rod 30.

[0043] The locking unit 20 includes a connecting portion 22, a locking lever 24, and a lock release button 26. An operating lever 30 is inserted into the connecting portion 22. The locking lever 24 is rotatably mounted on the connecting portion 22. The lock release button 26 is provided on the upper surface of the connecting portion 22. The user can attach or detach the accessory portion 12 relative to the operating lever 30 by operating the locking lever 24 and the lock release button 26. When the locking lever 24 is pulled up substantially perpendicularly to the operating lever 30 (see FIG. 2 ), the user can detach the accessory portion 12 relative to the operating lever 30. Figure 2 ) , the attachment portion 12 is mounted on the connecting portion 22, and then, when the locking lever 24 is pushed down substantially parallel to the operating lever 30 (refer to Figure 1 ), the accessory portion 12 is fixed relative to the operating rod 30.

[0044] The grip unit 50 has a grip shell 52. The grip shell 52 is made of a resin material formed into a shape covering the outer peripheral surface of the operating rod 30. The operating rod 30 passes through the grip shell 52. A rod 54 is provided on the upper surface of the grip shell 52. On the upper surface of the grip shell 52, an operating portion 56 and a display portion 58 are provided at a position forward of the rod 54. The display portion 58 displays the operating status of the hair dryer 2, etc. The operating portion 56 is provided with a power switch for switching the on state and the off state of the hair dryer 2, etc. A trigger 60 is provided at the lower part of the grip shell 52. The trigger 60 is used by the operator to operate the motor 72 (see Figure 9 ) is a component for the on-off action of the operator. When the rod 54 is not pressed in by the operator, the operator is prohibited from pressing the trigger 60. On the other hand, when the operator presses the rod 54 in, the operator is allowed to press the trigger 60. The operator presses the rod 54 in with the palm of one hand and presses the trigger 60 with the fingers of the same hand, thereby enabling the operator to drive the motor 72 described later (see Figure 9 ) operation.

[0045] The two battery packs B1 and B2 are detachably mounted on the rear portion of the rear housing 70. The rear housing 70 houses a motor 72 (see Figure 9 ) and a control board 74 for controlling the driving of the motor 72 (see Figure 9 The control board 74 controls the operation of the motor 72 by controlling the power supplied from the battery packs B1 and B2 to the motor 72 .

[0046] like Figure 3 As shown, the accessory part 12 includes a nozzle 90, an air supply pipe 100, an air intake pipe 150, and a first cover 160. The nozzle 90 is detachably mounted on the front portion of the air supply pipe 100. The air intake pipe 150 and the first cover 160 are detachably mounted on the rear portion of the air supply pipe 100. In addition, the rear portion of the air supply pipe 100 is configured so that a second cover 170 (see FIG. 170 ) can be provided instead of the air intake pipe 150. Figure 10The first cover 160 and the second cover 170 prevent the user's hands from entering the accessory portion 12.

[0047] The air supply duct 100 includes an adapter portion 102, a cylindrical tube 104, and a connecting rod 120. The cylindrical tube 104 includes a front cylindrical tube 106, an intermediate cylindrical tube 108, and a rear cylindrical tube 110. The front cylindrical tube 106 and the intermediate cylindrical tube 108 are fixed by screws S. The intermediate cylindrical tube 108 and the rear cylindrical tube 110 are fixed by screws S. A connecting rod fixing portion 112 is provided at the rear of the rear cylindrical tube 110. Figure 4 As shown, the rear cylindrical tube 110 is provided with a protrusion 114 that protrudes toward the outside of the rear cylindrical tube 110. The protrusion 114 extends in the front-rear direction.

[0048] like Figure 8 As shown, the connecting rod 120 has a hollow tube shape and extends in a straight line. Figure 3 As shown, a threaded hole 120a is provided in the connecting rod 120. The front portion of the connecting rod 120 is inserted into the connecting rod fixing portion 112 of the rear cylindrical tube 110. Figure 8 As shown, the second transmission shaft 122 is rotatably housed inside the connecting rod 120. The rear portion of the second transmission shaft 122 is attached to the first transmission shaft 32 inside the operating rod 30. The front portion of the second transmission shaft 122 is attached to the third transmission shaft 124 housed inside the cylindrical tube 104.

[0049] The front cylindrical tube 106 has front stator blades 130. A fan cover 134 is attached to the front portion of the front cylindrical tube 106. Furthermore, the third transmission shaft 124 is rotatably attached to the front cylindrical tube 106. The intermediate cylindrical tube 108 has rear stator blades 136. Front moving blades 138 are provided between the front stator blades 130 and the rear stator blades 136 within the cylindrical tube 104. Rear moving blades 140 are provided behind the rear stator blades 136. The front moving blades 138 and the rear moving blades 140 are fixed to the third transmission shaft 124. The front stator blades 130, the rear stator blades 136, the front moving blades 138, and the rear moving blades 140 constitute a fan 142.

[0050] The air intake pipe 150 has a cylindrical shape. The outer circumferential surface and the inner circumferential surface of the air intake pipe 150 are inclined so that the front side approaches the central axis of the operating rod 30. Figure 5 As shown, two chute 152 are provided on the left and right sides of the front portion of the air intake pipe 150. The chute 152 has a protrusion 114 (refer to FIG. Figure 4 ) corresponding shape. By embedding the protrusion 114 in the slide groove 152, the rotation of the air intake pipe 150 relative to the air supply pipe 100 is restricted. Figure 6As shown, three protrusions 154 are provided at the rear of the intake pipe 150. A sound absorbing material 156 is provided on the inner peripheral wall of the intake pipe 150. The sound absorbing material 156 is bonded to the inner peripheral wall of the intake pipe 150 by an adhesive. The sound absorbing material 156 is a sponge with a surface coating. Compared with a structure in which no coating is formed on the surface of the sponge, by forming a coating on the surface of the sponge, the effect of reducing noise by the sound absorbing material 156 can be improved. The diameter D1 of the rearmost side of the intake pipe 150 is, for example, 180 mm. Figure 8 As shown, the thickness t1 of the sound absorbing material 156 is constant in the front-to-back direction. The thickness t1 of the sound absorbing material 156 is, for example, 10 mm to 25 mm, and the thickness of the coating is, for example, 100 μm or less. The length L1 of the sound absorbing material 156 in the front-to-back direction is, for example, 100 mm. The ratio of the diameter D1 of the intake duct 150 to the length L1 of the sound absorbing material 156 is, for example, 1.8.

[0051] like Figure 7 As shown, the first cover 160 has an air intake hole 162, three threaded holes 164 provided on the outside of the air intake hole 162, and a connecting rod fixing portion 166 provided on the inside of the air intake hole 162. The three threaded holes 164 are provided on the three protrusions 154 (see FIG. Figure 6 ) corresponding position. The connecting rod fixing portion 166 is provided with a through hole 166a that penetrates the connecting rod fixing portion 166 in the front-to-back direction. Figure 3 As shown, a threaded hole 168 is provided in the connecting rod fixing portion 166. The threaded hole 168 is provided at a position corresponding to the threaded hole 120a of the connecting rod 120.

[0052] Next, the installation steps of the air intake duct 150 and the first cover 160 to the air supply duct 100 will be described. Figure 3 As shown, the protrusion 114 of the air supply pipe 100 and the slide groove 152 of the air intake pipe 150 are aligned, and the air intake pipe 150 is moved forward relative to the air supply pipe 100. As a result, the protrusion 114 is embedded in the slide groove 152. Next, the screw is screwed into the three protrusions 154 of the air intake pipe 150 (see Figure 6 ) and the three threaded holes 164 of the first cover 160 (see Figure 7 ), thereby fixing the air intake pipe 150 and the first cover 160 together. Next, screw the screw into the threaded hole 168 of the first cover 160 (see Figure 3 ) and the threaded hole 120a of the connecting rod 120 (see Figure 3 ), thereby fixing the first cover 160 and the connecting rod 120 together. This fixes the air intake duct 150 and the first cover 160 to the air supply duct 100. The air intake duct 150 and the first cover 160 can be removed from the air supply duct 100 by performing the steps reverse to the installation steps.

[0053] As shown above, Figures 1 to 9 As shown, a hair dryer 2 according to one embodiment includes an operating lever 30 extending in the front-to-back direction, a rear housing 70 provided at the rear of the operating lever 30 and housing a motor 72, and an accessory portion 12 detachably mounted to the front of the operating lever 30. The accessory portion 12 includes an air supply duct 100 housing a fan 142 driven by the motor 72, an air intake duct 150 provided at the rear of the air supply duct 100, and a nozzle 90 provided at the front of the air supply duct 100. A sound-absorbing material 156 is provided on the inner circumferential surface of the air intake duct 150. According to the above-mentioned structure, the sound-absorbing material 156 provided on the inner circumferential surface of the air intake duct 150 absorbs the noise generated by the air passing through the air intake duct 150. Therefore, the noise generated by the accessory portion 12 of the hair dryer 2 can be reduced.

[0054] like Figure 8 As shown, in one embodiment, the sound-absorbing material 156 extends along the inner circumference of the air intake pipe 150 in the axial direction of the operating rod 30, and the axial length of the sound-absorbing material 156 is in the range of 50 mm to 150 mm. If the axial length of the sound-absorbing material 156 is set to be short, the noise reduction effect of the sound-absorbing material 156 is insufficient. On the other hand, if the axial length of the sound-absorbing material 156 is set to be long, the axial length of the air intake pipe 150 must also be set to be long. In this case, the accessory part 12 becomes heavy and difficult for the user to operate. When the axial length of the sound-absorbing material 156 is in the range of 50 mm to 150 mm, the noise reduction effect of the sound-absorbing material 156 can be fully achieved, and the weight of the accessory part 12 can be suppressed. Therefore, the convenience of using the hair dryer 2 for the user can be improved.

[0055] In the hair dryer 2 of one embodiment, as Figure 6 、 Figure 8 As shown, the ratio of the diameter D1 of the air intake duct 150 to the length L1 of the sound absorbing material 156 in the axial direction (in this embodiment, the front-to-back direction) is in the range of 1.0 to 2.0. With this configuration, the sound absorbing material 156 can effectively absorb the noise generated by the air passing through the air intake duct 150. Consequently, the noise generated by the attachment 12 of the hair dryer 2 can be further reduced.

[0056] The air intake pipe 150 of one embodiment is as follows Figure 3As shown, the intake duct 150 is detachably mounted on the air supply duct 100, and a first cover 160 is mounted on the rear portion of the intake duct 150. The second cover 170 is mounted on the rear portion of the air supply duct 100 in place of the intake duct 150. According to the above structure, a user who wishes to reduce the noise generated by the accessory portion 12 of the hair dryer 2 can mount the intake duct 150 on the rear portion of the air supply duct 100. On the other hand, a user who desires a lighter accessory portion 12 can mount the second cover 170 on the rear portion of the air supply duct 100 in place of the intake duct 150. In this way, the user can choose whether to mount the intake duct 150 on the rear portion of the air supply duct 100. Therefore, the convenience for the user in using the hair dryer 2 can be improved.

[0057] In one embodiment of the hair dryer 2, the prime mover is a motor 72 driven by electricity. When the prime mover is an engine, the noise generated by the engine is relatively large. In this case, even if noise is generated by the accessory part 12, it will not have a significant impact on the noise generated by the hair dryer 2. On the other hand, when the prime mover is a motor 72, the noise generated by the motor 72 is relatively small. In this case, when the noise generated by the accessory part 12 is relatively large, it will have a significant impact on the noise generated by the hair dryer 2. According to the above structure, when the prime mover is the motor 72, the noise generated by the hair dryer 2 can be reduced.

[0058] like Figure 1 As shown, a hair dryer 2 according to one embodiment includes battery packs B1 and B2, which are detachably mounted on a rear housing 70 and supply power to a motor 72. Due to the above configuration, the hair dryer 2 can be configured without a power cord for external power supply. Therefore, the power cord does not interfere with the user's use of the hair dryer 2, thereby improving the user's operability.

[0059] In the hair dryer 2 of one embodiment, as Figure 8 As shown, the thickness t1 of the sound absorbing material 156 is in the range of 10 mm to 25 mm. If the thickness of the sound absorbing material 156 is reduced, the noise reduction effect of the sound absorbing material 156 will be insufficient. On the other hand, if the thickness of the sound absorbing material 156 is increased, the air flow path within the intake duct 150 will be narrowed, and the amount of air drawn into the intake duct 150 will decrease. When the thickness of the sound absorbing material 156 is in the range of 10 mm to 25 mm, the noise reduction effect of the sound absorbing material 156 can be fully achieved, and the amount of air drawn into the intake duct 150 can be kept appropriate.

[0060] (First Modification) The axial length of the sound absorbing material 156 may be less than 50 mm or longer than 150 mm.

[0061] (Second Modification) The ratio of the diameter D1 of the air intake duct 150 to the axial length L1 of the sound absorbing material 156 may be smaller than 1.0 or larger than 2.0.

[0062] (Third Modification) A film may not be formed on the surface of the sound absorbing material 156. With this configuration, the air flow resistance in the air intake duct 150 can be reduced compared to a configuration in which a film is formed on the surface of the sound absorbing material 156.

[0063] (Fourth Modification) The air intake duct 150 and the air supply duct 100 may be formed integrally.

[0064] (Fifth Modification) The "prime mover" is not limited to the motor 72, but may also be an engine.

[0065] (Sixth Modification) The hair dryer 2 may not include the battery packs B1 and B2. In this modification, the hair dryer 2 may be configured to be connectable to an external power source via a power cord.

[0066] (Seventh Modification) The thickness t1 of the sound absorbing material 156 may be less than 10 mm or may be greater than 25 mm.

Claims

1. A hair dryer, wherein: This hair dryer features: an operating rod extending in a front-to-rear direction; a rear housing, which is provided at the rear of the operating lever and houses the prime mover; and an accessory portion, which is detachably mounted on the front portion of the operating lever, The attachment part has: an air supply duct in which a fan driven by the prime mover is housed; an air intake pipe, which is arranged at the rear of the air supply pipe; and A nozzle is provided at the front of the air supply pipe. A sound absorbing material is provided on the inner circumference of the air intake pipe. The sound absorbing material extends along the axis of the operating rod on the inner peripheral surface of the air intake pipe. A ratio of the diameter of the air intake duct to the length of the sound absorbing material in the axial direction is in a range of 1.0 to 2.

0.

2. The hair dryer according to claim 1, wherein The length of the sound absorbing material in the axial direction is in a range of 50 mm to 150 mm.

3. The hair dryer according to claim 1 or 2, wherein: The air intake pipe is detachably mounted on the air supply pipe. A first cover is installed at the rear of the intake pipe. Furthermore, the second cover is configured to be attachable to the rear portion of the air supply duct in place of the air intake duct.

4. The hair dryer according to claim 1 or 2, wherein: The prime mover is a motor driven by electricity.

5. The hair dryer according to claim 4, wherein The hair dryer further includes a battery pack that is detachably mounted on the rear housing and supplies power to the motor.

6. The hair dryer according to claim 1 or 2, wherein: The thickness of the sound absorbing material is in the range of 10 mm to 25 mm.

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