Hair dryer

Abstract

To provide a hair dryer in which rotation of a grip part is reliably regulated and durability can be improved.SOLUTION: A hair dryer includes a body housing, a grip part, a rotation mechanism that can be switched between a grip extension state and a grip folded state with respect to the body housing, and a circuit board. The rotation mechanism includes a first cylindrical part fixed to the body housing, a second cylindrical part fixed to an exterior cover of the grip part, and a fixation member that fixes the second cylindrical part to the exterior cover. The fixation member fixes the circuit board inside the exterior cover. The first cylindrical part and the second cylindrical part include a slide surface, a projection part projecting from the slide surface, and a recess part recessed with respect to the slide surface. In the grip extension state and the grip folded state, the projection part and the recess part engage with each other. When the state transitions from the grip extension state to the grip folded state, at least one of the first cylindrical part and the second cylindrical part elastically deforms and the engagement of the projection part and the recess part is released.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Conventionally, there are known hair dryers that can be switched between an extended grip state in which the grip portion is extended relative to the main body housing and a folded grip state in which the grip portion is folded (see, for example, Patent Document 1). In such hair dryers, the grip portion is rotated around a rotation axis that is perpendicular to the sliding surface formed between the grip portion and the main body housing. This allows the hair dryer to be switched between the extended grip state and the folded grip state.

[0003] Some such hair dryers have a convex portion on one side of the main housing or the grip portion and a concave portion on the other, and are equipped with a mechanism in which the convex portion and the concave portion engage with each other to restrict rotation of the grip portion when the grip is extended or folded. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2024-17312 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the convex and concave portions that restrict the rotation of the grip portion are provided on the sliding surfaces of the main body housing and the grip portion. Since the gap between the main body housing and the grip portion must be small on such sliding surfaces, the convex and concave portions are constantly under stress. The convex and concave portions that are under stress are prone to wear, which reduces the durability of the hair dryer.

[0006] 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 that can reliably restrict rotation of the grip portion and improve durability. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a grip device comprising: a main body housing; a grip portion; a rotation mechanism that rotates the grip portion around a rotation axis that intersects with the extending direction of the grip portion, thereby enabling switching between a grip extended state in which the grip portion is extended relative to the main body housing and a grip folded state in which the grip portion is folded; and a circuit board housed in an exterior cover of the grip portion, wherein the rotation mechanism comprises a first cylindrical portion fixed to the main body housing and centered on the rotation axis; a second cylindrical portion fixed to the exterior cover and centered on the rotation axis; and a circuit board that connects the second cylindrical portion to the exterior cover. and a fixing member for fixing the circuit board inside the exterior cover, the fixing member engaging with the circuit board to fix the circuit board inside the exterior cover, the first cylindrical portion and the second cylindrical portion having an inner peripheral surface that slides against an outer peripheral surface of the other, and having a convex portion that protrudes from the outer peripheral surface or the inner peripheral surface and a concave portion that is recessed into the inner peripheral surface or the outer peripheral surface, the convex portion and the concave portion engage with each other when in the grip extended state and the grip folded state, and when transitioning from the grip extended state to the grip folded state, at least one of the first cylindrical portion and the second cylindrical portion elastically deforms, disengaging the convex portion and the concave portion. [Effects of the Invention]

[0008] According to the present invention, it is possible to reliably restrict rotation of the grip portion and improve durability. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a hair dryer. [Figure 2] FIG. 2 is a vertical cross-sectional view of the hair dryer. [Figure 3] 1A is a side view showing the grip of the hair dryer in an extended state and in a folded state; FIG. [Figure 4]FIG. 2 is a cross-sectional view of a main part around a rotation mechanism. [Figure 5] FIG. 2 is an exploded perspective view of a rotation mechanism, a circuit board, and an exterior cover. [Figure 6] FIG. 2 is a cross-sectional view of the periphery of a fixing member. [Figure 7] FIG. 10 is a perspective view of the grip portion before the exterior covers are fastened together. [Figure 8] 1A and 1B are explanatory diagrams showing the operating states of the rotation mechanism, when the rotation mechanism is in the grip extended state (A), when the rotation mechanism is in the grip folded state (B), and when the rotation mechanism is in the grip folded state (C). DETAILED DESCRIPTION OF THE INVENTION

[0010] A hair dryer 1 according to an embodiment will be described below with reference to the drawings. Note that the embodiment of the present invention described below is an example of how the present invention can be realized, and the scope of the present invention is not limited to the scope of the described embodiment. Therefore, the present invention can be implemented by adding various modifications to the embodiment.

[0011] [Hair Dryer 1 Configuration] Fig. 1 is a perspective view of a hair dryer 1. Fig. 2 is a vertical cross-sectional view of the hair dryer 1. Fig. 3 is a side view of the hair dryer 1.

[0012] As shown in FIGS. 1 to 3, hair dryer 1 mainly includes a main body housing 11, an air collecting hood 12, a grip portion 13, an air blowing fan 14, a motor 15, and a heater 16. Fan 14, motor 15, and heater 16 are provided inside cylindrical main body housing 11. Motor 15 and heater 16 are controlled by a control portion, which will be described later. Under the control of the control portion, motor 15 drives and rotates air blowing fan 14.

[0013] The fan 14 and motor 15 constitute a blower 17 that outputs air drawn in through the air intake 11a as an airflow toward the air outlet 11b. The blower 17 is disposed on the central axis CL0 (see FIG. 2) of the main body housing 11 with the fan 14 facing the air outlet 11b. A heater 16 is disposed inside the main body housing 11 to heat the airflow generated by the blower 17 and turn it into hot air. The hair dryer 1 can blow various types of air, such as hot air and cold air, by adjusting the speed of the air blown by the blower 17 and the temperature of the heater 16.

[0014] The wind collecting hood 12 is detachably attached to the front end of the main body housing 11, and is connected to the air outlet 11b by snap-fitting it to the front end of the main body housing 11. As a result, air generated by the blower 17 passes through the wind collecting hood 12 from the air outlet 11b and is discharged forward.

[0015] Hereinafter, when the hair dryer 1 blows air horizontally, i.e., when the central axis CL0 of the main body housing 11 extends horizontally, the direction of the central axis CL0 (left-right direction on the plane of FIG. 2) is defined as the "front-rear direction," the extension direction of the grip portion 13 perpendicular to this (up-down direction on the plane of FIG. 2) is defined as the up-down direction, and the direction perpendicular to the front-rear direction and the up-down direction (direction perpendicular to the plane of FIG. 2) is defined as the "left-right direction." Furthermore, in the up-down direction, the side from the grip portion 13 toward the main body housing 11 is defined as "upward," and the opposite side is defined as "downward." Furthermore, in the front-rear direction, the side toward which air flows toward an object is defined as "forward," and the opposite side is defined as "rearward."

[0016] [Grip section 13 configuration] The grip portion 13 includes a push switch device 21, a slide switch device 22, a power cord 23, a circuit board 24, exterior covers 25A and 25B, and a rotation mechanism 26. The power cord 23 is connected to the circuit board 24 and is led out from the lower end of the grip portion 13. The power cord 23 is connected to a power source (not shown) and supplies electricity to the motor 15, heater 16, and circuit board 24.

[0017] As shown in FIGS. 4 and 5 , the grip portion 13 extends in the vertical direction and can be rotated clockwise and counterclockwise by the rotation mechanism 26 around a rotation axis CL1 perpendicular to the sliding surfaces P1 and P2. For convenience of explanation, the sliding surface on the main body housing 11 side is referred to as P1, and the sliding surface on the grip portion 13 side is referred to as P2. The rotation axis CL1 intersects with the vertical direction, which is the extension direction of the grip portion 13. Specifically, the rotation axis CL1 is inclined at an inclination angle α of 45° with respect to the vertical direction. This allows the hair dryer 1 to be switched between a grip-extended state (shown in FIG. 3A ) in which the grip portion 13 is extended relative to the main body housing 11, and a grip-folded state (shown in FIG. 3B ) in which the grip portion 13 is folded. The rotation mechanism 26 also includes a mechanism for restricting the rotation of the grip portion 13 in the grip-extended state and the grip-folded state.

[0018] The exterior cover 25 holds the push switch device 21, the slide switch device 22, and the power cord 23. The circuit board 24 is fixed by a fixing member 53 of the rotation mechanism 26, which will be described later. Fixing of the circuit board 24 by the fixing member 53 will be described later. The exterior cover 25 is formed in a substantially cylindrical shape and is divided into two in the left-right direction. Specifically, the exterior cover 25 is made up of an exterior cover 25A located on the left side and an exterior cover 25B located on the right side. When the grip is extended, the exterior cover 25 extends in the vertical direction.

[0019] The exterior covers 25A and 25B are formed with an exposure opening 25C, a fitting groove 25D, a guide groove 25E, and a through hole 25F. The exposure opening 25C is an opening that exposes the push switch device 21. In the example shown in FIG. 5, the exposure opening 25C, the fitting groove 25D, the guide groove 25E, and the through hole 25F are formed at a position that intersects with a dividing surface 25G of the exterior covers 25A and 25B. The through hole 25F is formed to match the position and dimensions of a first cylindrical portion 51, which will be described later. The first cylindrical portion 51, which is fixed to the main body housing 11, is positioned inside the exterior covers 25A and 25B through the through hole 25F.

[0020] The fitting groove 25D is disposed at a position that connects with the exposed opening 25C. The fitting groove 25D extends outward in the up-down direction from the exposed opening 25C. The fitting groove 25D fits with a flange portion 42 of the holding member 35, which will be described later.

[0021] In the grip extended state, the guide groove 25E is located below the exposed opening 25C. The guide groove 25E guides the operating member 34 of the slide switch device 22, which will be described later. The circuit board 24 is fixed inside the exterior cover 25, behind the exposed opening 25C and the guide groove 25E.

[0022] An engagement hole 25H is formed in one exterior cover 25A. However, no engagement hole 25H is formed in the other exterior cover 25B. The engagement hole 25H is provided near the through hole 25F and engages with an engagement claw 52A of the second cylindrical portion 52, which will be described later.

[0023] A switch 31, a plurality of LEDs 32, and a slide switch 33 are mounted on the circuit board 24. The switch 31 and the LEDs 32 constitute a part of the push switch device 21. The slide switch 33 constitutes a part of the slide switch device 22. A control unit (not shown) is provided on the circuit board 24. The control unit is, for example, a computing means such as a CPU. The circuit board 24 is also connected to the motor 15 and the heater 16 by wiring cables (not shown).

[0024] The slide switch device 22 includes a slide switch 33 and an operating member 34. In this embodiment, the slide switch device 22 is a mode changeover switch. The slide switch 33 is, for example, a contact switch. The operating member 34 is held so as to be slidable up and down relative to the exterior cover 25. An engagement claw 34A is integrally formed on the rear side of the operating member 34, i.e., on the inner side of the exterior cover 25. The engagement claw 34A engages with a knob 33A of the slide switch 33. The knob 33A moves up and down in response to the sliding operation of the operating member 34. The slide switch 33 transmits a switching signal to the control unit according to the position of the knob 33A. The control unit switches the mode of the hair dryer 1 in response to the switching signal.

[0025] The control unit of circuit board 24 controls motor 15 and heater 16 in response to the switching signal. As a result, hair dryer 1 has, for example, a hot air mode in which hot air is blown, a cold air mode in which cold air is blown, a glossing mode in which hot air and cold air are blown randomly (irregularly), and a cold / hot air mode in which hot air and cold air are switched at regular intervals. The control unit can selectively execute these modes.

[0026] The push switch device 21 includes a switch 31, a holding member 35, an operating member 36, and a spring 38. In this embodiment, the push switch device 21 is a power switch that switches the power ON / OFF state. The switch 31 is, for example, a microswitch that switches the power ON / OFF state when pressed.

[0027] The holding member 35 is fixed to the exterior cover 25. The holding member 35 is integrally formed with a cylindrical portion 41 and a flange portion 42. The cylindrical portion 41 is formed in a cylindrical shape. The cylindrical portion 41 holds the operating member 36 and the spring 38 on the radially inner side.

[0028] The flange portion 42 protrudes radially outward from the outer circumferential surface of the cylindrical portion 41. The flange portion 42 fits into the fitting groove 25D of the exterior cover 25. This positions the holding member 35 in the radial and circumferential directions. Furthermore, the base end of the cylindrical portion 41 of the holding member 35 is supported by the circuit board 24. This positions the holding member 35 in the axial direction. The holding member 35 is fixed to the exterior cover 25 after being positioned in the radial, circumferential, and axial directions.

[0029] The operating member 36 is housed in the holding member 35. The operating member 36 includes an exposed portion 36A and a pressing portion 36B. The tip surface of the exposed portion 36A is exposed from the exposed opening 25C. The exposed portion 36A is formed in a cylindrical shape. The exposed portion 36A is movable forward and backward relative to the holding member 35.

[0030] The pressing portion 36B protrudes from the base end of the exposed portion 36A toward the base end (toward the circuit board 24). The pressing portion 36B is formed in a cylindrical shape with an outer diameter smaller than that of the exposed portion 36A, and is disposed coaxially with the exposed portion 36A. The switch 31 is located on the base end side of the pressing portion 36B.

[0031] The switch 31 is pressed by the pressing portion 36B when the operating member 36 is pressed (moved forward or backward). By receiving pressure from the pressing portion 36B, the switch 31 switches the power ON / OFF state. The base end side of the exposed portion 36A abuts against the tip of the spring 38. The pressing portion 36B is inserted inside the spring 38. The spring 38 biases the operating member 36 toward the tip in the axial direction. When the operating member 36 is pressed and moves toward the base end in the axial direction, it returns to its original position due to the bias of the spring 38.

[0032] [Configuration of rotation mechanism 26] Rotation mechanism 26 includes a first cylindrical portion 51, a second cylindrical portion 52, and a fixed member 53. Rotation mechanism 26 is provided on sliding surfaces P1 and P2 between main body housing 11 and grip portion 13. For convenience of explanation, the sliding surface on the main body housing 11 side will be referred to as P1, and the sliding surface on the grip portion 13 side will be referred to as P2 below.

[0033] [Configuration of first cylindrical portion 51] The first cylindrical portion 51 is fixed to the main body housing 11 by, for example, screwing. The first cylindrical portion 51 is provided at a position protruding from the slide surface P1. The first cylindrical portion 51 has a cylindrical shape centered on the rotation axis CL1 and is made of, for example, resin. The first cylindrical portion 51 has a plurality of recesses 51B formed on its inner circumferential surface 51A. The recesses 51B are semicircular recesses that are recessed radially inward relative to the inner circumferential surface 51A. In this embodiment, the first cylindrical portion 51 has two recesses 51B provided at equal angular intervals of 180° around the rotation axis CL1 (see FIGS. 8(A) to 8(C)).

[0034] [Configuration of second cylindrical portion 52] The second cylindrical portion 52 is fixed to the exterior cover 25A by a fixing member 53. As will be described in detail later, the second cylindrical portion 52 is arranged inside the exterior cover 25 with respect to the slide surface P2. The second cylindrical portion 52 is integrally formed with a plurality of engagement claws 52A, 52B and a plurality of protrusions 52C. The second cylindrical portion 52 has a cylindrical shape centered on the rotation axis CL1. The second cylindrical portion 52 is made of a material softer than the first cylindrical portion 51, for example, a soft resin.

[0035] The protrusions 52C are formed on an outer peripheral surface 52D of the second cylindrical portion 52 (see FIGS. 8(A) to 8(C)). The protrusions 52C are semicircular protrusions that protrude radially outward relative to the outer peripheral surface 52D. The protrusions 52C are located at positions corresponding to the recesses 51B of the first cylindrical portion 51. In this embodiment, the second cylindrical portion 52 is provided with two protrusions 52C at equal angular intervals of 180° around the rotation axis CL1. The engagement claws 52A and 52B are located at one end of the second cylindrical portion 52, on the side opposite to the main body housing 11.

[0036] As will be described later, in the grip extended state and the grip folded state, the recessed portion 51B of the first cylindrical portion 51 fits into the protruding portion 52C of the second cylindrical portion 52. When transitioning from the grip extended state to the grip folded state, the second cylindrical portion 52 elastically deforms, and the engagement between the recessed portion 51B and the protruding portion 52C is released.

[0037] The pair of engagement claws 52A, 52B protrude in the left-right direction from the outer circumferential surface of the second cylindrical portion 52. The engagement claws 52A, 52B have a cross section formed in the shape of a square pillar. One engagement claw 52A engages with the engagement hole 25H of the exterior cover 25A, and the other engagement claw 52B engages with the engagement hole 53B of the fixing member 53.

[0038] [Configuration of fixing member 53] 6, fixing member 53 has an arc-shaped cross section perpendicular to the up-down direction. Fixing member 53 has an outer diameter smaller than the inner diameter of exterior covers 25A and 25B. Fixing member 53 has notches 53A and engagement holes 53B (see FIGS. 5 and 7).

[0039] As shown in Fig. 7, the notch 53A extends in the vertical direction from the lower end of the fixing member 53. The notch 53A engages with the upper end of the circuit board 24. This allows the fixing member 53 to fix the circuit board 24 inside the exterior covers 25A and 25B. The engagement hole 53B penetrates the fixing member 53 from the inner circumferential surface side to the outer circumferential surface side. The engagement hole 53B engages with the engagement claw 52B of the second cylindrical portion 52.

[0040] The fixing member 53 is fastened to one exterior cover 25A with a screw 54 (see FIG. 5). The fixing member 53 fastened to the exterior cover 25A is located inside the other exterior cover 25B (see FIG. 6).

[0041] [Assembly process of grip part 13] When assembling the grip portion 13, the first cylindrical portion 51 is fixed to the main body housing 11, and the switch 31, slide switch 33, etc. are mounted on the circuit board 24. The worker first fits the inner circumferential surface 51A of the first cylindrical portion 51 to the outer circumferential surface 52D of the second cylindrical portion 52, and then fits the convex portion 52C of the second cylindrical portion 52 to the concave portion 51B of the first cylindrical portion 51. This causes the first cylindrical portion 51 and the second cylindrical portion 52 to be integrated.

[0042] After the first cylindrical portion 51 and the second cylindrical portion 52 are integrated, the engaging claw 52A is engaged with the engaging hole 25H of the exterior cover 25A, and the engaging claw 52B is engaged with the engaging hole 53B of the fixing member 53. As a result, the second cylindrical portion 52 is sandwiched between the exterior cover 25A and the fixing member 53, and the first cylindrical portion 51 and the second cylindrical portion 52 are disposed inside the exterior cover 25A. Then, while maintaining the second cylindrical portion 52 sandwiched between the exterior cover 25A and the fixing member 53, the worker fastens the fixing member 53 to the exterior cover 25A with the screw 54. The second cylindrical portion 52 is fixed to the exterior cover 25A by the fastening portion between the exterior cover 25A and the fixing member 53. At this time, signal cables (not shown) connecting to the motor 15, heater 16, etc. inside the main body housing 11 are routed through the inside of the first cylindrical portion 51 and the second cylindrical portion 52 and into the interior of the exterior cover 25A.

[0043] After the second cylindrical portion 52 is fixed to the exterior cover 25A by the fixing member 53, the upper end of the circuit board 24 is engaged with the notch 53A of the fixing member 53 (the state shown in FIG. 7). At this time, the circuit board 24 is pushed all the way into the interior (left) of the exterior cover 25A. As a result, the circuit board 24 is fixed to the fixing member 53 inside the exterior cover 25A. After the circuit board 24 is fixed to the fixing member 53, the push switch device 21, the slide switch device 22, the power cord 23, etc. are attached to the exterior cover 25A. Also, the signal cable is connected to the circuit board 24. Then, the exterior cover 25A and the exterior cover 25B are fastened together by screws or the like. As a result, the first cylindrical portion 51, the second cylindrical portion 52, and the circuit board 24 are housed inside the exterior covers 25A and 25B, and assembly of the grip unit 13 is completed.

[0044] [Operation of rotation mechanism 26] The operation of the rotation mechanism 26 will be described with reference to Figures 8(A) to 8(C). Since Figures 8(A) to 8(C) only explain the operation of the rotation mechanism 26, exterior covers 25A and 25B and fixing member 53 are omitted. As described above, in the rotation mechanism 26, the inner circumferential surface 51A of the first cylindrical portion 51 and the outer circumferential surface 52D of the second cylindrical portion 52 slide against each other.

[0045] 8(A), when the hair dryer 1 is in the grip extended state, the recessed portion 51B of the first cylindrical portion 51 fits into the protruding portion 52C of the second cylindrical portion 52. This restricts the rotation of the grip portion 13 to which the second cylindrical portion 52 is fixed.

[0046] As shown in FIG. 8(B), the grip portion 13 is rotated counterclockwise from the grip extended state to transition to the grip folded state. In this case, the first cylindrical portion 51 is elastically deformed, and the convex portion 52C is released from the concave portion 51B. The outer diameter of the second cylindrical portion 52 in the normal state (when inelastically deformed) plus the amount of protrusion of the convex portion 52C is greater than the inner diameter of the first cylindrical portion 51. Therefore, when the convex portion 52C is released from the concave portion 51B, the second cylindrical portion 52 is subjected to stress from the inner circumferential surface 51A of the first cylindrical portion 51. As a result, the second cylindrical portion 52 is elastically deformed so as to bend toward the rotation axis CL1.

[0047] 8(C), when the grip portion 13 is further rotated counterclockwise, it transitions to the grip folded state, and the recessed portion 51B and the protruding portion 52C fit together. At this time, the second cylindrical portion 52 is released from the stress received from the first cylindrical portion 51 and returns to its original shape due to its elasticity. This restricts the rotation of the grip portion 13 to which the second cylindrical portion 52 is fixed.

[0048] [Effects of the embodiment] According to the above embodiment, the inner circumferential surface 51A of the first cylindrical portion 51 and the outer circumferential surface 52D of the second cylindrical portion 52 slide against each other, allowing the grip portion 13 to rotate stably relative to the main body housing 11. Furthermore, in the grip-extended and grip-folded states, the convex portion 52C protruding from the outer circumferential surface 52D engages with the concave portion 51B recessed relative to the inner circumferential surface 51A. When transitioning from the grip-extended state to the grip-folded state, the second cylindrical portion 52 elastically deforms, disengaging the convex portion 52C from the concave portion 51B. This reliably restricts rotation of the grip portion 13 in the grip-extended and grip-folded states. Furthermore, unlike conventional rotation mechanisms, the convex and concave portions are provided on the sliding surfaces, but rather on the inner circumferential surfaces 51A and 51D of the cylindrical portions 51 and 52. This reduces stress on the convex and concave portions 52C and concave portions 51B, preventing wear. This improves the durability of the hair dryer 1.

[0049] Furthermore, since the fixing member 53 that fixes the second cylindrical portion 52 is engaged with the circuit board 24, when the grip portion 13 rotates, the circuit board 24 rotates integrally with the second cylindrical portion 52. In other words, the ability of the circuit board 24 to follow the rotation of the grip portion 13 is improved. This makes it possible to prevent distortion of the circuit board 24.

[0050] Furthermore, during the assembly process of the grip portion 13, before the exterior covers 25A and 25B are fastened together, the circuit board 24 is engaged with the fixing member 53 and fixed inside the exterior cover 25A. This prevents the circuit board 24 from being displaced due to tension in the signal cables and power cord 23, etc. This eliminates the need to hold down the circuit board 24, simplifying the assembly process. This also improves the assembly precision of the circuit board 24, improving product quality. In other words, the ease of assembly of the hair dryer 1 can be improved.

[0051] Furthermore, since the circuit board 24 is fixed by engaging with the fixing member 53, stress on the circuit board 24 caused by pressing the push switch device 21, sliding the slide switch device 22, etc., can be suppressed, thereby preventing failure of the circuit board 24, etc.

[0052] [Other Examples] In the above embodiment, the inner peripheral surface 51A of the first cylindrical portion 51 fixed to the main body housing 11 slides against the outer peripheral surface 52D of the second cylindrical portion 52 fixed to the grip portion 13, but this is not limiting, and a configuration in which the outer peripheral surface of the first cylindrical portion 51 slides against the inner peripheral surface of the second cylindrical portion 52 is also possible. Furthermore, in the above embodiment, the convex portion 52C protruding from the outer peripheral surface 52D engages with the concave portion 51B recessed relative to the inner peripheral surface 51A to restrict the rotation of the grip portion 13, but this is not limiting, and a configuration in which the convex portion protruding from the inner peripheral surface of the first cylindrical portion 51 or the second cylindrical portion 52 engages with the concave portion recessed relative to the outer peripheral surface of the first cylindrical portion 51 or the second cylindrical portion 52 to restrict the rotation of the grip portion 13 is also possible.

[0053] In the above embodiment, when transitioning from the grip extended state to the grip folded state, the second cylindrical portion 52 elastically deforms to release the engagement between the convex portion and the concave portion, but this is not limiting and the configuration may be such that at least one of the first cylindrical portion 51 and the second cylindrical portion 52 elastically deforms to release the engagement. In this case, it is preferable that the elastically deforming portion of the first cylindrical portion 51 or the second cylindrical portion 52 is made of a softer material.

[0054] In addition, in the above embodiment, the push switch device 21 is a power switch and the slide switch device 22 is a mode changeover switch, but the functions of the switches are not limited to these. For example, the push switch device 21 may be a mode changeover switch and the slide switch device 22 may be a power switch. [Explanation of symbols]

[0055] 1...hair dryer, 11...main body housing, 12...air collecting hood, 13...grip portion, 14...fan, 15...motor, 16...heat generating device, 21...push switch device, 22...slide switch device, 23...power cord, 24...circuit board, 25, 25A, 25B...exterior cover, 25C...exposed opening, 25D...fitting groove, 25E...guide groove, 25F...through hole, 25G...partition surface, 25H...engagement hole, 26...rotation mechanism, 31...switch, 32...LED, 33...slide switch, 33A... knob portion, 34... operating member, 34A... engaging claw, 35... holding member, 36... operating member, 36A... exposed portion, 36B... pressing portion, 38... spring, 41... cylindrical portion, 42... flange portion, 51... first cylindrical portion, 51A... inner peripheral surface, 51B... recessed portion, 52... second cylindrical portion, 52A, 52B... engaging claw, 52C... convex portion, 52D... outer peripheral surface, 53... fixing member, 53A... notch, 54B... engaging hole, 54... screw, CL0... central axis, CL1... rotation axis, P1, P2... slide surface

Claims

1. A main body housing; A grip portion and a rotation mechanism that rotates the grip portion around a rotation axis that intersects with the extending direction of the grip portion, thereby enabling switching between a grip extended state in which the grip portion is extended and a grip folded state in which the grip portion is folded relative to the main body housing; a circuit board housed in an exterior cover of the grip portion, The rotation mechanism includes: a first cylindrical portion fixed to the main body housing and centered on the rotation axis; a second cylindrical portion fixed to the exterior cover and centered on the rotation axis; a fixing member that fixes the second cylindrical portion to the exterior cover, The fixing member is engaging the circuit board to secure the circuit board within the exterior cover; The first cylindrical portion and the second cylindrical portion are The inner peripheral surface of one side slides against the outer peripheral surface of the other side, a protrusion protruding from the outer peripheral surface or the inner peripheral surface, and a recess recessed relative to the inner peripheral surface or the outer peripheral surface, When the grip is in the extended grip state and the folded grip state, the convex portion and the concave portion are engaged with each other, When the hair dryer transitions from the grip extended state to the grip folded state, at least one of the first cylindrical portion and the second cylindrical portion elastically deforms, disengaging the convex portion from the concave portion.

2. The hair dryer according to claim 1, 10. A hair dryer according to claim 9, wherein one of the first cylindrical portion and the second cylindrical portion is made of a softer material than the other.

3. The hair dryer according to claim 1, An operating member that slides or advances and retreats relative to the grip portion, The hair dryer according to claim 1, wherein the circuit board is mounted with a switch device that is switched in response to a sliding or forward / backward operation of the operating member.

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