Hair dryer

Abstract

To provide a hair drier capable of easily attaching and detaching a mesh filter.SOLUTION: The hair dryer includes a first mesh filter that covers the air inlet, a rear cover that is positioned on an outer diameter side of the first mesh filter and on an upstream side of an airflow generated by the blower, at least a part of the first mesh filter and the rear cover is a magnetic body, the main body housing includes a first tapered inner peripheral surface that positions the first mesh filter, a second tapered inner peripheral surface that positions the rear cover, and a first magnet that attracts the first mesh filter positioned by the first tapered inner peripheral surface and detachably fixes the first mesh filter to the main body housing, and a second magnet that attracts the rear cover positioned by the second tapered inner peripheral surface and detachably fixes the rear cover to the main body housing.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hair dryer. [Background technology]

[0002] Conventionally, there has been known a hair dryer that uses a blower to suck air through an air intake port and then expels it as an air current (see, for example, Patent Document 1). The hair dryer described in Patent Document 1 includes a mesh filter that prevents dust from entering the air intake port and a rear cover that supports the mesh filter, and the mesh filter and rear cover are fixed to the main body housing by engaging a recess provided on the inner peripheral wall of the main body housing with a protrusion formed on the rear cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3239420 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the hair dryer described in Patent Document 1, a recess on the inner wall of the main body housing engages with a protrusion on the rear cover, making it difficult to attach and detach the mesh filter from the rear cover. Furthermore, because the air blower draws air through the air intake, dust and hair tend to adhere to the mesh filter. It is extremely troublesome to disengage the recess from the protrusion every time in order to remove these particles from the mesh filter.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hair dryer in which a mesh filter can be easily attached and detached. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the present invention is a hair dryer having a cylindrical main housing with an air outlet on the front side and an air intake on the rear side, and a blower device arranged within the main housing, and is characterized in that it is equipped with a first mesh filter covering the air intake, and a rear cover having an outer diameter larger than that of the first mesh filter and positioned upstream of the first mesh filter in the airflow generated by the blower, at least a portion of the first mesh filter and the rear cover being made of magnetic material, and the main housing is equipped with a first tapered inner surface whose inner diameter decreases from the upstream side to the downstream side of the airflow and positions the first mesh filter, a second tapered inner surface which is positioned radially outward from the first tapered inner surface and whose inner diameter decreases from the upstream side to the downstream side of the airflow and positions the rear cover, a first magnet which attracts the first mesh filter positioned by the first tapered inner surface and detachably fixes it to the main housing, and a second magnet which attracts the rear cover positioned by the second tapered inner surface and detachably fixes it to the main housing. [Effects of the Invention]

[0007] According to the present invention, a hair dryer in which a mesh filter can be easily attached and detached can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a hair dryer according to an embodiment of the present invention, as viewed from the front. [Figure 2] FIG. 2 is a perspective view of the hair dryer as viewed from the rear. [Figure 3] FIG. 2 is a cross-sectional view of the hair dryer. [Figure 4] FIG. 2 is a perspective view of a front cover, an outer cylinder, an inner cylinder, a heater, a motor housing, etc. [Figure 5] FIG. 2 is an exploded perspective view of the hair dryer. [Figure 6] FIG. 2 is a rear view of the hair dryer with the grill cover and the first mesh filter removed. [Figure 7] FIG. [Figure 8] FIG. 8 is a cross-sectional view of a main part taken along line VIII-VIII in FIG. [Figure 9] FIG. 2 is a perspective view of a motor housing, a first magnet, and a second mesh filter. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] FIG. 1 is a perspective view of a hair dryer 1 according to an embodiment as seen from the front, FIG. 2 is a perspective view of the hair dryer 1 as seen from the rear, and FIG.

[0011] [Overall configuration of Hair Dryer 1] As shown in Figures 1 to 3, the hair dryer 1 according to this embodiment mainly comprises a cylindrical main body housing 2, a handle portion 3 connected to the main body housing 2, a blower fan 4 arranged within the main body housing 2, and a motor 5 that drives the fan 4.

[0012] The main body housing 2 has, at both opposing ends, an air intake 21 and an air outlet 22. The air intake 21 is provided on the rear end side of the main body housing 2, and air is drawn into the main body housing 2 through the air intake 21.

[0013] The fan 4 and motor 5 constitute the blower 7, which outputs air drawn in through the air intake 21 as an airflow toward the air outlet 22. The motor 5 is a small motor such as a DC motor. The blower 7 is disposed on the central axis O (see FIG. 3) of the main body housing 2, with the fan 4 facing the air intake 21. Hereinafter, the upstream side of the airflow generated by the blower 7 (the side where the air intake 21 is located relative to the blower 7) will be referred to simply as the "upstream side," and the downstream side of the airflow (the side where the air outlet 22 is located relative to the blower 7) will be referred to simply as the "downstream side." A heater 8 is disposed inside the main body housing 2 to heat the airflow generated by the blower 7 to generate warm air.

[0014] The handle 3 is provided with a push switch 9 for turning the power on and off, a slide switch 10 for adjusting the airflow rate, and a push switch 11 for switching between hot and cold air modes. The handle 3 also houses a first circuit board 12 for a control circuit that controls the entire hair dryer 1, and electronic components such as switches and sensors are also mounted on this first circuit board 12. A power cord 13 is connected to the first circuit board 12, and this power cord 13 is led out from the bottom end of the handle 3.

[0015] The inside of air intake 21 is covered with a first mesh filter 23, a second mesh filter 24, and a grill cover 25 (rear cover). The second mesh filter 24 is fixed to the main body housing 2. The first mesh filter 23 is located upstream of the second mesh filter 24. The first mesh filter 23 has smaller mesh holes than the second mesh filter 24. This makes it difficult for foreign matter such as dust and hair to enter the main body housing 2.

[0016] Grill cover 25 has a plurality of ribs 25a (see FIG. 2). Grill cover 25 allows air to pass through vent holes defined by ribs 25a. Grill cover 25 is located upstream of first mesh filter 23. This allows grill cover 25 to protect first mesh filter 23. This prevents damage to first mesh filter 23, which has a small mesh size.

[0017] An inner cylindrical body 31, a motor housing 32 (cylindrical housing), a connection part 33, a high-voltage generator 27, and positive and negative ion generating electrodes (not shown) are provided inside the main body housing 2. The inner cylindrical body 31 is disposed along the direction of the central axis O of the main body housing 2.

[0018] The main housing 2 has an outer cylinder 35 that defines an air passage 34 together with the inner cylinder 31, a front cover 36 that covers the downstream side of the air passage 34, an outer cover 37, and a fixing ring 38.

[0019] The outer cover 37 is disposed on the outer peripheral surface of the main housing 2. An attachment portion 39 is integrally formed with the outer cover 37. The first mesh filter 23 and the grill cover 25 are detachably attached to the attachment portion 39.

[0020] The outer cylinder 35 is a cylindrical member fixed to the inner circumferential surface of the outer cover 37. However, this is not limiting, and the outer cylinder 35 and the outer cover 37 may be formed integrally. The air passage 34 is an annular space defined by the inner cylinder 31 and the outer cylinder 35. The downstream end face of the outer cylinder 35 is connected to the front cover 36. The outer cylinder 35 also has a narrowed portion 35a at its downstream end, the radial dimension of which narrows toward the front cover 36.

[0021] The front cover 36 is a disk-shaped member that fits onto the inner circumferential surface of the outer cover 37. The front cover 36 is formed integrally with the outer cylindrical body 35. The front cover 36 has a second partition wall 40 that closes the downstream side of the inner cylindrical body 31, and a plurality of air outlets 22 formed around the second partition wall 40. The second partition wall 40 is formed in a concave shape that is concave from the downstream side to the upstream side.

[0022] The fixed ring 38 is located at the downstream end of the main body housing 2 and is an annular member that fits onto the inner circumferential surface of the outer cover 37. The fixed ring 38 has a plurality of first locking holes 38a (see FIG. 4). The first locking holes 38a are through holes that penetrate the fixed ring 38 in the radial direction. The inner circumferential surface of the outer cover 37 is formed with first locking claws 37a (see FIG. 4) that protrude radially inward. The first locking holes 38a are locked by the first locking claws 37a. This secures the fixed ring 38 to the outer cover 37. The fixed ring 38 abuts against the front cover 36.

[0023] Next, the configuration of the inner cylinder 31, heater 8, motor housing 32, connection portion 33, etc. will be described with reference to Figures 3 and 4. Figure 4 is a perspective view of the front cover 36, outer cylinder 35, inner cylinder 31, heater 8, motor housing 32, etc.

[0024] [Configuration of inner cylinder 31] 3 and 4, the inner cylinder 31 is located inside the outer cylinder 35 and has a first partition wall 41 that closes the upstream side. A through hole 41a is formed in the first partition wall 41. The through hole 41a penetrates the first partition wall 41 parallel to the central axis O.

[0025] The inner cylinder 31 has a first tapered outer peripheral surface 42, a constant diameter outer peripheral surface 43, and a second tapered outer peripheral surface 44. The first tapered outer peripheral surface 42 is formed on the outer peripheral surface of the first partition wall 41 and is a tapered outer peripheral surface whose outer diameter increases from the upstream side to the downstream side. The constant diameter outer peripheral surface 43 is an outer peripheral surface that extends with a constant diameter from the first tapered outer peripheral surface 42 along the direction of the central axis O. The second tapered outer peripheral surface 44 is a tapered outer peripheral surface whose outer diameter increases from the constant diameter outer peripheral surface 43 toward the second partition wall 40 of the front cover 36.

[0026] [Heater 8 Configuration] The heater 8 is disposed inside the air passage 34. Specifically, the heater 8 is supported by a heater support plate 45 disposed inside the air passage 34. The heater support plates 45 are erected on the uniform outer peripheral surface 43 of the inner cylindrical body 31 at intervals in the circumferential direction of the inner cylindrical body 31. In the example shown in FIG. 4 , six heater support plates 45 are provided on the uniform outer peripheral surface 43 and are disposed at equal angular intervals of 60°. The heater 8 is, for example, a bent electric heating wire that is spirally wound around the outer edge of the heater support plate 45. Power is supplied to the heater 8 under the control of a control circuit, and the temperature thereof increases. As a result, the airflow W1 blown from the blower 7 is heated inside the air passage 34, and the heated air is discharged from the air outlet 22.

[0027] [Configuration of rectifying fin 46] A plurality of rectifying fins 46 are provided upright on the first tapered outer peripheral surface 42. The plurality of rectifying fins 46 are arranged at intervals in the circumferential direction of the inner cylindrical body 31. More specifically, the plurality of rectifying fins 46 are integrally formed inside the connecting portion 33, and the rectifying fins 46 are arranged so as to surround the first tapered outer peripheral surface 42 by connecting and integrating the inner cylindrical body 31 and the connecting portion 33. The rectifying fins 46 are arranged at positions different from the heater support plate 45 in the circumferential direction of the inner cylindrical body 31. As a result, the airflow W1 blown from the blower 7 is dispersed by the rectifying fins 46 and sent into the air passage 34.

[0028] [Configuration of air outlet 22] The air passage 34 communicates with a plurality of air outlets 22 formed in the front cover 36. The air outlets 22 are arranged in the circumferential direction around the inner cylinder 31 and the second partition wall 40. More specifically, the air outlets 22 are formed in the shape of arc slits centered on the central axis O. As described above, the inner cylinder 31 has the second tapered outer peripheral surface 44, and the outer cylinder 35 has the narrowed portion 35a, so that the air passage 34 has a shape that tapers toward the air outlets 22.

[0029] [Configuration of motor housing 32] The motor housing 32 holds the blower 7 therein and is formed in a cylindrical shape with an inner diameter smaller than the air passage 34. More specifically, the motor 5 is coaxially fixed to the motor housing 32 along the central axis O. The motor housing 32 is disposed upstream of the inner cylindrical body 31. The upstream end of the motor housing 32 is connected to the upstream end of the main housing 2.

[0030] A high-voltage generator 27 is also disposed on the outer peripheral surface of the motor housing 32. The high-voltage generator 27 supplies positive and negative high-voltage pulse voltages to a positive ion generating electrode and a negative ion generating electrode (not shown), respectively. The positive ion generating electrode and the negative ion generating electrode are disposed symmetrically with respect to the central axis O, and at least a portion of each electrode protrudes into the air passage 34. The positive and negative high voltages supplied from the high-voltage generator 27 cause positive and negative ions to be emitted from the tips of the positive ion generating electrode and the negative ion generating electrode, respectively.

[0031] [Configuration of connection part 33] The connecting portion 33 connects the air passage 34 and the motor housing 32, and is formed in a truncated cone shape with an inner diameter that increases from the upstream side to the downstream side. This allows the airflow W1 generated by the blower 7 to pass through the connecting portion 33 and be sent into the air passage 34.

[0032] The connecting portion 33 is integrally formed with the aforementioned rectifying fin 46 and abutment portion 47. The abutment portion 47 is a disk-shaped member located at the center of the connecting portion 33 and has a female screw hole in its center. The rectifying fin 46 connects the outer peripheral surface of the abutment portion 47 to the inner peripheral surface of the connecting portion 33. In other words, the abutment portion 47 is connected to the connecting portion 33 via the rectifying fin 46. The connecting portion 33 has a plurality of second engaging holes 33a. The second engaging holes 33a are through holes that penetrate the connecting portion 33 in the radial direction. Second engaging claws 35b that protrude radially outward are formed on the outer peripheral surface of the outer cylindrical body 35. The second engaging holes 33a are engaged with the second engaging claws 35b. This connects the connecting portion 33 to the outer cylindrical body 35.

[0033] The abutting portion 47 is fastened to the first partition wall 41 by threading a screw 48 (see FIG. 3) inserted into the through hole 41a of the first partition wall 41 into the female screw hole. In other words, fastening the first partition wall 41 to the abutting portion 47 connects the inner cylinder body 31 to the connecting portion 33 and the motor housing 32.

[0034] As described above, the outer cylinder 35, front cover 36, inner cylinder 31, motor housing 32, and connecting portion 33 are arranged in an integrated state inside the main housing 2. The base end of the motor housing 32 abuts against the downstream side of the attachment portion 39, and the front cover 36 abuts against the upstream side of the fixed ring 38. This prevents the outer cylinder 35, front cover 36, inner cylinder 31, motor housing 32, and connecting portion 33 from coming off the main housing 2 in the axial direction.

[0035] A second circuit board 49 is disposed in the space defined between the motor housing 32 and the main housing 2. The second circuit board 49 is connected to the motor 5 and the first circuit board 12 via wiring (not shown). A temperature sensor (not shown) provided inside the air passage 34 is also connected to the second circuit board 49.

[0036] As described above, second circuit board 49 is connected to first circuit board 12, and first circuit board 12 controls the power supplied to each component in response to the user's operation of switches 9 to 11. Second circuit board 49 controls motor 5 and heater 8 in response to control signals from first circuit board 12 and temperature detection signals from the temperature sensor. Specifically, second circuit board 49 controls motor 5 and heater 8 in response to temperature measurement values ​​corresponding to the temperature detection signals and the selection states of switches 9 to 11.

[0037] Furthermore, the second circuit board 49 controls the high-voltage generator 27 in response to a temperature detection signal from the temperature sensor. This allows ions to be emitted from the ion generating electrode in accordance with the temperature conditions of the outside air and the airflow W1, and the ions to be mixed into the airflow W1 discharged from the air outlet 22. Thus, an appropriate amount of ions can be constantly emitted in accordance with the usage environment of the hair dryer 1.

[0038] A fitting tubular portion 32A (see FIG. 9) is integrally formed with the motor housing 32. The fitting tubular portion 32A is disposed along the central axis O and is a cylindrical protrusion that protrudes upstream from the upstream end of the motor housing 32. A locking groove 32B is formed on the outer circumferential surface of the fitting tubular portion 32A. The locking groove 32B is a groove that extends in the direction of the central axis O.

[0039] The motor housing 32 also has first magnet fixing portions 32C and 32D (see FIG. 9). The first magnet fixing portions 32C and 32D are located radially outward of the fitting cylindrical portion 32A. The first magnet fixing portions 32C and 32D are formed in a frame shape with an open upstream side. The first magnet fixing portions 32C and 32D hold a first magnet 61, which will be described later.

[0040] Next, the configurations of the mounting portion 39, first mesh filter 23, second mesh filter 24, and grill cover 25 will be described with reference to Fig. 5 to Fig. 8. Fig. 5 is an exploded perspective view of the hair dryer 1, Fig. 6 is a rear view of the hair dryer 1 with the grill cover 25 and first mesh filter 23 removed, Fig. 7 is a perspective view of the grill cover 25 as seen from the downstream side, and Fig. 8 is a cross-sectional view of the main parts taken along line VIII-VIII in Fig. 3.

[0041] [Configuration of mounting portion 39] 5 and 6, the mounting portion 39 is formed integrally with the outer cover 37. The mounting portion 39 is a ring-shaped portion located on the inner circumferential surface of the outer cover 37, at the upstream end. The mounting portion 39 has a first mounting portion 51 to which the first mesh filter 23 is attached, and a second mounting portion 52 to which the grill cover 25 is attached. A first magnet 61 (see FIG. 3) and a second magnet 62 (see FIG. 8) are provided inside (downstream side of) the mounting portion 39.

[0042] The first mounting portion 51 has a first tapered inner circumferential surface 51A and an abutting surface 51B. The first tapered inner circumferential surface 51A is a tapered surface whose inner diameter decreases from the upstream side to the downstream side along the central axis O. The abutting surface 51B connects to the downstream end of the first tapered inner circumferential surface 51A. The abutting surface 51B is a flat surface that is perpendicular to the central axis O and continues in the circumferential direction.

[0043] The second mounting portion 52 has a second tapered inner circumferential surface 52A, a constant diameter inner circumferential surface 52B, an abutting surface 52C, and a fitting groove 52D. The second mounting portion 52 is located radially outward and upstream of the first mounting portion 51. The second tapered inner circumferential surface 52A is a tapered surface whose inner diameter decreases from the upstream side to the downstream side along the central axis O. The constant diameter inner circumferential surface 52B connects to the downstream end of the second tapered inner circumferential surface 52A. The constant diameter inner circumferential surface 52B is an inner circumferential surface that extends with a constant diameter from the second tapered inner circumferential surface 52A along the direction of the central axis O. The abutting surface 52C connects to the downstream end of the constant diameter inner circumferential surface 52B and the upstream end of the first tapered inner circumferential surface 51A. The abutting surface 52C is a flat surface that is perpendicular to the central axis O and continues in the circumferential direction.

[0044] The fitting groove 52D is a groove that is recessed radially from the second tapered inner circumferential surface 52A to the abutting surface 52C and extends along the central axis O. In this embodiment, the second attachment portion 52 has two fitting grooves 52D. The fitting grooves 52D are arranged at equal angular intervals of 180° in the circumferential direction.

[0045] Second magnet fixing portions 55A and 55B (see FIG. 8) are provided inside (downstream side) of mounting portion 39. Second magnet fixing portions 55A and 55B are positioned radially outward of first magnet fixing portions 32C and 32D. Second magnet fixing portions 55A and 55B are formed in a frame shape with an open downstream side. Second magnet fixing portions 55A and 55B hold a second magnet 62, which will be described later.

[0046] [Configuration of first mesh filter 23] As shown in FIG. 5, the first mesh filter 23 has a cylindrical portion 23A and a flat portion 23B. The first mesh filter 23 is coaxially arranged in the main housing 2 along the central axis O. The flat portion 23B closes the upstream end of the cylindrical portion 23A. The cylindrical portion 23A and the flat portion 23B have meshes formed throughout that are smaller than those of the second mesh filter 24. The meshes of the first mesh filter 23 and the second mesh filter 24 are formed by weaving wires together, and include those with gaps between the wires as well as those with multiple fine holes. At least a portion of the cylindrical portion 23A and the flat portion 23B is magnetic, and in this embodiment, the entire portion is formed from a metal such as iron.

[0047] The mesh sizes of the flat plate portion 23B and the cylindrical portion 23A of the first mesh filter 23 may be different. This allows the speeds of the air drawn in from the flat plate portion 23B and the cylindrical portion 23A to be different, dispersing foreign matter such as dust and reducing clogging of the mesh. Furthermore, this difference in the speeds of the air drawn in can reduce the intake noise and sound frequencies generated by the first mesh filter 23.

[0048] The maximum outer diameter of first mesh filter 23 (maximum outer diameter of tubular portion 23A) is formed to match the minimum inner diameter of first tapered inner circumferential surface 51A. As a result, first mesh filter 23 is positioned in the radial direction by first tapered inner circumferential surface 51A. Guided by first tapered inner circumferential surface 51A, first mesh filter 23 is pushed downstream and comes into contact with abutment surface 51B. As a result, first mesh filter 23 is positioned in the axial direction.

[0049] [Grill Cover 25 Configuration] As shown in FIG. 7, the grill cover 25 has a frame body 53, ribs 25a, and a fitting protrusion 54. The frame body 53 is a ring-shaped portion having an outer diameter larger than that of the first mesh filter 23. The grill cover 25 is arranged coaxially with the main housing 2 along the central axis O. The ribs 25a are provided inside the frame body 53 and are arranged parallel to each other at equal intervals. The frame body 53 has a positioning tapered outer peripheral surface 53A, a positioning constant diameter outer peripheral surface 53B, and a positioning end surface 53C.

[0050] The positioning tapered outer peripheral surface 53A is a tapered surface whose outer diameter decreases from the upstream side to the downstream side along the central axis O. The positioning constant diameter outer peripheral surface 53B is connected to the downstream end of the positioning tapered outer peripheral surface 53A. The positioning constant diameter outer peripheral surface 53B is an outer surface that extends with a constant diameter from the positioning tapered outer peripheral surface 53A along the direction of the central axis O. The positioning end face 53C is connected to the downstream end of the positioning constant diameter outer peripheral surface 53B. The positioning end face 53C is a flat surface that is perpendicular to the central axis O and continues in the circumferential direction. The fitting protrusions 54 are protrusions that protrude radially from the positioning tapered outer peripheral surface 53A to the positioning end face 53C and extend along the central axis O. The fitting protrusions 54 are arranged at equal angular intervals of 180° in the circumferential direction.

[0051] The minimum inner diameter and inclination angle of the positioning tapered outer peripheral surface 53A are formed to match the second tapered inner peripheral surface 52A. As a result, the grill cover 25 is positioned radially by the second tapered inner peripheral surface 52A. Furthermore, as the grill cover 25 is pushed downstream by the guidance of the second tapered inner peripheral surface 52A, the positioning constant diameter outer peripheral surface 53B fits into the constant diameter inner peripheral surface 52B, and the positioning end surface 53C abuts against the abutment surface 52C. This positions the grill cover 25 radially and axially. Furthermore, the fitting protrusion 54 fits into the fitting groove 52D of the second mounting portion 52. As a result, the grill cover 25 is positioned circumferentially about the central axis O.

[0052] A magnetic ring 56 is integrally provided with the grill cover 25. The magnetic ring 56 is a ring-shaped magnetic body that is placed on the positioning end surface 53C of the grill cover 25. In other words, the grill cover 25 is partially made of a magnetic body. In this embodiment, the magnetic ring 56 is made of a metal such as iron. However, this is not limiting, and the entire grill cover 25 may be made of a magnetic body.

[0053] [Configuration of second mesh filter 24] As shown in Figure 9, the second mesh filter 24 has a cylindrical portion 24A, a curved portion 24B, and a locking piece 24C. The second mesh filter 24 is arranged coaxially with the main housing 2 along the central axis O. The curved portion 24B closes the upstream end of the cylindrical portion 24A. The curved portion 24B has a curved shape that is convex toward the upstream side, and a mesh is formed all over the curved portion.

[0054] The second mesh filter 24 is attached to the motor housing 32. More specifically, the inner circumferential surface of the cylindrical portion 24A is fitted onto the outer circumferential surface of the fitting cylindrical portion 32A, thereby fixing the second mesh filter 24 to the motor housing 32. The interlocking piece 24C is also interlocked with the interlocking groove 32B of the fitting cylindrical portion 32A. This positions the second mesh filter 24 circumferentially relative to the motor housing 32.

[0055] [Configuration of first magnet 61] As shown in FIG. 9 , the first magnet 61 is held by the first magnet fixing portions 32C and 32D of the motor housing 32. As described above, the motor housing 32 is fixed inside the main body housing 2. In other words, the first magnet 61 is fixed inside the main body housing 2 via the motor housing 32. In the assembly process of the hair dryer 1, the motor housing 32 can be stored inside the main body housing 2 with the first magnet 61 fixed to the first magnet fixing portions 32C and 32D. Note that the first magnet 61 is held in the first magnet fixing portions 32C and 32D by fitting the first magnet 61 into the first magnet fixing portions 32C and 32D, or by adhesively fixing the first magnet 61 to the first magnet fixing portions 32C and 32D.

[0056] The hair dryer 1 of this embodiment is equipped with two first magnets 61. The first magnets 61 have an arc-shaped outer shape. The first magnets 61 are arranged at equal angular intervals of 180° in the circumferential direction around the central axis O. The first magnets 61 held by the first magnet fixing portions 32C and 32D are located inside (downstream side of) the abutting surface 51B of the first attachment portion 51, and attract the first mesh filter 23 positioned by the first tapered inner circumferential surface 51A.

[0057] More specifically, the first magnet 61 is fixed to the motor housing 32 in a position aligned with the outer circumferential portion of the first mesh filter 23, which is positioned radially by the first tapered inner circumferential surface 51A. The first magnet 61 has a magnetic force that enables it to attract the first mesh filter 23 with the first mounting portion 51 therebetween and to detach the first mesh filter 23 from the first mounting portion 51 with the force of the user. In this way, the first magnet 61 detachably fixes the first mesh filter 23 to the main body housing 2.

[0058] The second magnet 62 is held by the second magnet fixing portions 55A and 55B of the mounting portion 39. In other words, the second magnet 62 is fixed inside the main body housing 2 via the mounting portion 39. The second magnet 62 is held by the second magnet fixing portions 55A and 55B by fitting the second magnet 62 into the second magnet fixing portions 55A and 55B, or by adhesively fixing the second magnet 62 to the second magnet fixing portions 55A and 55B.

[0059] The hair dryer 1 of this embodiment includes two second magnets 62. The second magnets 62 are formed into an arc-shaped outer shape. The second magnets 62 are arranged at equal angular intervals of 180° in the circumferential direction centered on the central axis O. Furthermore, the second magnets 62 are provided at positions different from the first magnets 61 in the circumferential direction centered on the central axis O. More specifically, the second magnets 62 are provided at positions spaced apart by an angular interval of 90° from the first magnets 61 in the circumferential direction centered on the central axis O.

[0060] The second magnet 62 held by the second magnet fixing portions 55A, 55B is positioned inside (downstream) the abutment surface 52C of the second mounting portion 52 and attracts the magnetic ring 56 of the grill cover 25 positioned by the second tapered inner surface 52A.

[0061] More specifically, the second magnet 62 is fixed to the main housing 2 in alignment with the magnetic ring 56 of the grill cover 25, which is positioned radially by the second tapered inner circumferential surface 52A and the constant diameter inner circumferential surface 52B. The second magnet 62 has a magnetic force that enables it to attract the grill cover 25 with the second mounting portion 52 sandwiched therebetween, and also enables the first mesh filter 23 to be detached from the second mounting portion 52 by the user's force. In this way, the second magnet 62 detachably fixes the grill cover 25 to the main housing 2.

[0062] [Effects of the embodiment] As described above, the hair dryer 1 according to this embodiment can achieve the following effects.

[0063] The main housing 2 has a first tapered inner circumferential surface 51A whose inner diameter decreases from the upstream side to the downstream side and which positions the first mesh filter 23, and a second tapered inner circumferential surface 52A located radially outward of the first tapered inner circumferential surface 51A and whose inner diameter decreases from the upstream side to the downstream side and which positions the grill cover 25. The first mesh filter 23, which is positioned by the first tapered inner circumferential surface 51A, is attracted and detachably fixed by a first magnet 61, and the grill cover 25, which is positioned by the second tapered inner circumferential surface 52A, is attracted and detachably fixed by a second magnet 62. This allows the user to easily attach and detach the first mesh filter 23 to and from the main housing 2. Furthermore, if dust and hair become attached to the first mesh filter 23, the first mesh filter 23 can be easily removed from the main housing 2 and cleaned.

[0064] Furthermore, the first magnet 61 is fixed to the motor housing 32 in a position aligned with the outer periphery of the first mesh filter 23, which is positioned radially by the first tapered inner periphery surface 51A. Therefore, the first mesh filter 23 can be accurately positioned in the radial direction of the main body housing 2, and the first mesh filter 23 can be securely held by the attraction force of the first magnet 61. Furthermore, since the motor housing 32 is provided inside the main body housing 2 with the first magnet 61 fixed thereto, during the assembly process of the hair dryer 1, the motor housing 32 can be placed inside the main body housing 2 with the first magnet 61 fixed to the first magnet fixing portions 32C, 32D. This prevents the position of the first magnet 61 from shifting relative to the main body housing 2 and the first mounting portion 51, allowing the first mesh filter 23 to be positioned more accurately and securely held relative to the main body housing 2.

[0065] Furthermore, the first magnet 61 and the second magnet 62 are provided inside the main housing 2 and are provided at different positions in the circumferential direction of the main housing 2. Therefore, the magnetic force of the first magnet 61 and the magnetic force of the second magnet 62 do not affect each other, and the first mesh filter 23 and the grill cover 25 can be securely held, respectively. [Other Examples] In the above embodiment, one hair dryer 1 is provided with multiple first magnets 61, but the present invention is not limited to this, and a configuration with one first magnet 61 may be used. In this case, it is preferable that the first magnet 61 is formed in a ring shape and is arranged coaxially with the main body housing 2 along the central axis O. This makes it possible to reduce the number of parts in addition to achieving the same effects as the above embodiment. Similarly, the second magnet 62 may be formed in a single hair dryer 1. In this case, like the first magnet 61, it is preferable that the second magnet 62 is formed in a ring shape and is arranged coaxially with the main body housing 2 along the central axis O.

[0066] Furthermore, in the above embodiment, a grill cover 25 is provided as a rear cover, but the present invention is not limited to this, and any shape that can cover the upstream side of the first mesh filter 23 and protect the first mesh filter 23 may be used, for example, a mesh cover with larger mesh than the first mesh filter 23.

[0067] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention. The present invention covers all technical matters included in the technical ideas described in the claims. The above-described embodiments are preferred examples, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the appended claims. [Explanation of symbols]

[0068] 1 hair dryer 2 Main body housing 3 Handle 4 Fans 5 motors 7. Blower 8 Heater 21 Air intake 22 Air outlet 23 First mesh filter 24 Second mesh filter 25 Grill Cover 31 Inner cylinder 32 Motor housing 32C, 32D 1st magnet fixing part 33 Connection 34 Ventilation passage 35 outer cylinder 36 Front cover 37 Outer cover 38 Fixed ring 39 Mounting part 45 Heater support plate 51 First mounting part 51A First tapered inner surface 52 Second mounting part 52A Second tapered inner surface 55A, 55B Second magnet fixing part 61 First Magnet 62 Second Magnet

Claims

1. A hair dryer having a cylindrical main body housing having an air outlet on a front side and an air intake on a rear side, and a blower device disposed inside the main body housing, a first mesh filter covering the intake port; a rear cover having an outer diameter larger than that of the first mesh filter and located upstream of the first mesh filter in the airflow generated by the blower, At least a portion of the first mesh filter and the rear cover is made of a magnetic material, The main body housing includes: a first tapered inner circumferential surface whose inner diameter decreases from the upstream side to the downstream side of the airflow and which positions the first mesh filter; a second tapered inner circumferential surface that is located radially outward of the first tapered inner circumferential surface, the second tapered inner circumferential surface having an inner diameter that decreases from the upstream side to the downstream side of the airflow, and that positions the rear cover; a first magnet that attracts the first mesh filter positioned by the first tapered inner peripheral surface and removably fixes it to the main housing; a second magnet that attracts the rear cover positioned by the second tapered inner peripheral surface and detachably fixes it to the main body housing.

2. The hair dryer according to claim 1, a cylindrical housing provided inside the main body housing and holding the blower therein; a first magnet fixed to the cylindrical housing by being aligned with the outer peripheral portion of the first mesh filter, which is positioned radially by the first tapered inner peripheral surface;

3. The hair dryer according to claim 1, The hair dryer according to claim 1, wherein the first magnet and the second magnet are provided inside the main body housing and are provided at different positions in a circumferential direction of the main body housing.

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