hair dryer

Abstract

To provide a hair dryer allowing a user to thin a bent part.SOLUTION: A hair dryer 10 including a body part 30 and a grip part 40, where the grip part 40 is bent into a folded state and an unfolded state by rotating it around a shaft 27 orthogonal to a slide surface 16 formed toward the body part 30. A bent part 24 of the hair dryer 10 includes a first member 50 fixed to a housing of one of the body part 30 and the grip part 40 and having a protrusion 52, and a second member 60 fixed to a housing of the other of the body part 30 and the grip part 40 and having a recess 62. The first member 50 and the second member 60 are disposed one on top of the other in a direction orthogonal to the slide surface 16, at least one of the first member 50 and the second member 60 is elastically deformed when transitioning between the folded state and the unfolded state, and the protrusion 52 and the recess 62 are fitted in the folded state and the unfolded state to regulate the rotation of the grip part 40.SELECTED DRAWING: Figure 5

Description

【Technical Field】 【0001】 The present invention relates to a hair dryer. 【Background Art】 【0002】 Conventionally, there is known a hair dryer that bends a connecting portion between a main body portion and a grip portion to fold it compactly (for example, described in Patent Document 1 below). 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2011-67315 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In the hair dryer as described above, there has been a desire to make the bent portion thinner. 【0005】 The present invention has been completed based on the above circumstances, and an object thereof is to provide a hair dryer capable of making the bent portion thinner. 【Means for Solving the Problems】 <D 【0006】 The present invention provides a hair dryer comprising a main body and a grip, wherein the grip rotates around an axis perpendicular to a sliding surface formed between the grip and the main body, thereby bending between a folded state and an open state, the bending portion of the hair dryer comprising a first member fixed to one housing of the main body and the grip and having a convex portion, and a second member fixed to the other housing of the main body and the grip and having a concave portion, the first member and the second member being arranged in a direction perpendicular to the sliding surface, at least one of the first member and the second member being elastically deformed when transitioning between the folded state and the open state, the convex portion and the concave portion fitting together in the folded state and the open state, and restricting the rotation of the grip. [Effects of the Invention] 【0007】 According to the present invention, since the first member and the second member are arranged in a direction perpendicular to the sliding surface, the bent portion of the hair dryer can be made thinner. [Brief explanation of the drawing] 【0008】 [Figure 1] A side view of the hair dryer in Example 1, showing it in the open position. [Figure 2] A side view of a hair dryer in its folded state. [Figure 3] Front view showing a hair dryer in the open position. [Figure 4] Cross-sectional view of a hair dryer [Figure 5] Cross-sectional view showing the bent section in the open state. [Figure 6] Cross-sectional view showing the first and second members removed from the bent section in the open position. [Figure 7] Exploded perspective view showing the relationship between the first component, the second component, the main housing, and the grip housing. [Figure 8] A cross-sectional view showing the bent portion in an open state, corresponding to the cross-section at position AA in Figure 5. [Figure 9] Side view showing the first and second members in the fitted state [Figure 10] Side view showing the first and second members in the fitted state, as viewed from a direction orthogonal to Fig. 9 [Figure 11] Plan view showing the first and second members in the fitted state [Figure 12] Bottom view showing the first and second members in the fitted state [Figure 13] Cross-sectional view showing the bent portion in the open state, corresponding to the cross-section at the B-B position in Fig. 5 [Figure 14] Cross-sectional view showing the second member, corresponding to the cross-section at the C-C position in Fig. 12 [Figure 15] Side view showing the first and second members of the hair dryer in Example 2 [Figure 16] Bottom view showing the second member [Figure 17] Side view showing the first and second members of the hair dryer in Example 3 [Figure 18] Side view showing the first and second members of the hair dryer in Example 4 [Figure 19] Bottom view showing the second member​​​​​​​​​​​​​​​​​​​​​Furthermore, in the hair dryer of the present invention, both the first member and the second member may be ring-shaped, and the central parts of the first member and the second member may penetrate in a direction perpendicular to the sliding surface. With such a configuration, since the wires can be routed on the inner circumference side of the first member and the second member, the bent portion of the hair dryer can be made thinner than when the wires are routed on the outer circumference side of the first member and the second member. 【0012】 Furthermore, in the first member of the hair dryer of the present invention, the position of the protrusion and the position of the convex fixing portion fixed to one of the housings may be offset in the circumferential direction around the axis. With such a configuration, the force applied to the first member can be distributed, thereby improving the durability of the first member. 【0013】 Furthermore, in the hair dryer of the present invention, the second member may have a displacement portion that is elastically displaced by contact with the convex portion and a concave fixing portion that is fixed to the other housing, and the concave fixing portion may be provided on both sides of the displacement portion in the circumferential direction with respect to the axis. With such a configuration, the displacement portion is supported at both ends by the concave fixing portion, so that the torque can be increased while ensuring the strength of the first member and the second member. 【0014】 Furthermore, in the hair dryer of the present invention, the other housing may have a base portion that supports the displacement portion. With such a configuration, since the displacement portion is supported by the base portion of the housing, the durability of the member having the recess can be improved and the torque can be increased. 【0015】 Furthermore, in the hair dryer of the present invention, the recess may have an inclined surface that is inclined in the circumferential direction with respect to the axis. With such a configuration, the convex portion moves along the inclined surface, allowing the grip portion to rotate smoothly. 【0016】 Furthermore, in the hair dryer of the present invention, the second member may have a second inclined surface adjacent to the inclined surface, and the inclination angle of the inclined surface relative to the sliding surface may be steeper than the inclination angle of the second inclined surface relative to the sliding surface. With such a configuration, the torque required to release the folded or open state is greater than the torque required to put it into the folded or open state. Therefore, it is difficult to unintentionally release the folded or open state. 【0017】 Furthermore, the hair dryer of the present invention moves from the folded state to the open state by rotating the grip portion in a first direction, and moves from the open state to the folded state by rotating it in a second direction opposite to the first direction. The housing of the main body portion and the housing of the grip portion may have a first stopper portion that restricts rotation from the open state to the first direction, and a second stopper portion that restricts rotation from the folded state to the second direction. With such a configuration, the range of rotation of the grip portion can be restricted, making it easier to use. Because the range of rotation of the housing of the main body portion and the housing of the grip portion can be restricted, it is possible to prevent the internal wiring from becoming excessively twisted, which can lead to the wiring coming loose or breaking. 【0018】 <Example 1> Hereinafter, an embodiment of the present invention will be described in detail with reference to Figures 1 to 14, 20 and 21. The hair dryer 10 in this embodiment comprises a main body 30, a grip 40 and an operating unit 14, as shown in Figure 1. The grip 40 is thinner and easier to grip than the main body 30. An air outlet 11 is provided at the tip of the main body 30. Various nozzles 13 can be attached to and detached from the air outlet 11. Figures 1 to 3 show the hair dryer 10 with a nozzle 13 attached, and Figure 4 shows the hair dryer 10 without a nozzle 13 attached. 【0019】 An air intake port 12 is provided at the rear end of the main body 30. The air intake port 12 is covered by a mesh filter. The mesh filter has holes in the entire rear end surface of the main body 30 and the entire circumferential surface connected to the front side of the rear end surface, allowing air to be drawn in from a wide area. Because the mesh filter has a fine mesh structure, it is difficult for dust and hair to enter. 【0020】 The grip portion 40 rotates clockwise and counterclockwise around a rotation axis 27 (see Figures 5 and 6) perpendicular to the sliding surface 16. The hair dryer 10 can be in an open state (see Figure 1) or a folded state (see Figure 2) by the rotation of the grip portion 40. 【0021】 When the hair dryer 10 is open, the grip portion 40 extends away from the main body portion 30 (see Figure 2). When the hair dryer 10 is folded, the grip portion 40 extends approximately parallel to the main body portion 30. When the hair dryer 10 is folded, there is a space 17 between the main body portion 30 and the grip portion 40 that is approximately the same thickness as the grip portion 40. This space 17 is large enough for the user's fingers to be inserted, so the user can hook their hand into the U-shaped portion between the main body portion 30 and the grip portion 40 to use it. 【0022】 As shown in Figure 1, the sliding surface 16 intersects the extension direction of the grip portion 40 at an angle. In a side view, the sliding surface 16 is inclined downward from the front to the rear. 【0023】 In each figure, the direction perpendicular to the sliding surface 16 is indicated by the Y-axis, and the directions parallel to the sliding surface 16 are indicated by the X-axis and Z-axis. The positive direction of the X-axis is the front, the negative direction of the X-axis is the rear, the positive direction of the Y-axis is the top, the negative direction of the Y-axis is the bottom, the positive direction of the Z-axis is the left, and the negative direction of the Z-axis is the right. The Y-axis is parallel to the rotation axis 27. 【0024】 As shown in Figure 4, the main body 30 includes a blower unit 18, a heating unit 19, an ionizer (not shown), a first temperature sensor 28, a second temperature sensor 29, and a control unit 21, as well as a main body housing 32 that houses these components inside. 【0025】 The air blower unit 18 is located at the rear end of the main body housing 32. The air blower unit 18 has a small, lightweight brushless DC motor. The motor is driven at a high rotational speed of 100,000 rpm or more. This allows the air blower unit 18 to deliver a fast, high-pressure airflow. 【0026】 The heating unit 19 is positioned in front of the air blowing unit 18. The heating unit 19 heats the air blown from the air blowing unit 18. The heating unit 19 has an electric heating element, such as a nichrome wire. The maximum power consumption of the heating element is 1000W ± 5%, and the amount of heat generated by the heating element is proportional to the power consumption. 【0027】 The ionizer generates negative ions. These negative ions are carried by the airflow from the outlet 11 to the user's hair, suppressing static electricity in the hair. The outlet 11 is coated with ceramic that emits far-infrared rays. 【0028】 The first temperature sensor 28 and the second temperature sensor 29 are composed of, for example, NTC thermistors. The first temperature sensor 28 is positioned between the air blowing unit 18 and the heating unit 19. The first temperature sensor 28 is mounted on the control board 21S of the control unit 21. The first temperature sensor 28 measures the temperature of the air (outside temperature) drawn in from the air intake port 12. 【0029】 The second temperature sensor 29 is located at the front end of the main body 30. The second temperature sensor 29 measures the internal temperature at the front end of the main body 30. 【0030】 The main housing 32 has a wind tunnel section 38. The wind tunnel section 38 is fixed to the inside of the front end of the main housing 32. The wind tunnel section 38 is cylindrical in shape. The wind tunnel section 38 is tapered. The inner circumferential surface of the wind tunnel section 38 has an inclined surface that slopes gently inward toward the tip. The wind tunnel section 38 can increase the speed and pressure of the wind generated by the motor. 【0031】 A protrusion 31 is provided on the lower surface of the main body 30. The protrusion 31 is part of the main body 30 and protrudes downward. The base of the protrusion 31 is constricted (see Figures 1 and 3). 【0032】 As shown in Figure 4, the grip portion 40 has a grip housing 41 capable of accommodating the AC circuit board 22 and the like. The grip portion 40 is connected to the lower side of the protruding portion 31 by a connecting portion 25, which will be described later. The outer circumferential surface of the protruding portion 31 and the outer circumferential surface of the grip portion 40 are flush. 【0033】 The middle section of the grip portion 40 is slightly thicker than the upper and lower ends (see Figures 1 and 3). The power cord 15 extends from the lower end of the grip portion 40. 【0034】 Both the main body housing 32 and the grip housing 41 are made of synthetic resin, for example, molded from polycarbonate resin. As shown in Figure 3, the main body housing 32 has a left main body housing 32L and a right main body housing 32R. The grip housing 41 has a left grip housing 41L and a right grip housing 41R. The left main body housing 32L and the right main body housing 32R, as well as the left grip housing 41L and the right grip housing 41R, have a mating surface 23 at their center in the left-right direction. The left main body housing 32L and the right main body housing 32R, as well as the left grip housing 41L and the right grip housing 41R, are symmetrical with respect to the mating surface 23, except for the external design (presence or absence of the operating part 14, etc.). 【0035】 The control unit 14 includes a first control unit 14F, a second control unit 14S, and a third control unit 14T. By operating the control unit 14, the user can start and stop the hair dryer 10, adjust the airflow, adjust the air temperature, and switch between operating modes. 【0036】 The airflow of the hair dryer 10 can be switched between two levels: strong and weak. Specifically, the airflow of the hair dryer 10 can be switched between a "HIGH mode" that blows out a strong breeze and a "LOW mode" that blows out a weak breeze. The airflow is controlled by the power supplied to the motor of the air blower unit 18. In "HIGH mode", the airflow is 0.9 m³. 3 The wind speed is 20-26 m / s. In "LOW mode", the airflow is 0.6 m 3 The wind speed is 12-18 m / s. 【0037】 The air temperature of the hair dryer 10 can be switched between two levels: high and low. Specifically, the air temperature of the hair dryer 10 can be switched between a "HOT mode" that blows out hot air and a "COOL mode" that blows out cold air. The air temperature of the hair dryer 10 is controlled by the power supplied to the heating element of the heating unit 19. In "COOL mode," room temperature air is blown out from the outlet 11 without supplying power to the heating element. 【0038】 The Hair Dryer 10's "HOT mode" allows you to switch between different operating modes. Specifically, the Hair Dryer 10's operating modes can be switched between "Standard Mode," "Mode 1," and "Mode 2." "Standard Mode" blows out hot air at 80°C to 90°C. "Mode 1" blows out hot air at or below the first set temperature. "Mode 2" blows out hot air at or below the second set temperature. The first and second set temperatures are lower than the air temperature in "Standard Mode." The first and second set temperatures are different from each other. For example, the first set temperature is the temperature assumed to result in a surface temperature of 50°C for the user's hair. "Mode 1" is suitable for drying the scalp and hair roots. The second set temperature is the temperature assumed to result in a surface temperature of 60°C for the user's hair. "Mode 2" is suitable for drying the ends of the hair. 【0039】 The first control unit 14F is located on the grip section 40. By operating the first control unit 14F, the hair dryer 10 can be started, stopped, and switched between hot and cold air modes. Specifically, by operating the first control unit 14F, the mode is switched sequentially from "Power OFF" to "COOL mode" to "HOT mode". When the hair dryer 10 is open, the first control unit 14F is located on the front of the grip section 40, and when the hair dryer 10 is folded, it is located on the underside of the grip section 40 (see Figures 1 and 2). 【0040】 The second control unit 14S and the third control unit 14T are provided on the main body 30. The airflow of the hair dryer 10 can be adjusted by operating the second control unit 14S. Specifically, by operating the second control unit 14S, the settings are switched sequentially from "HIGH mode" to "LOW mode". 【0041】 The operating mode of the hair dryer 10 can be switched by operating the third operating unit 14T. Specifically, by operating the third operating unit 14T, the mode switches sequentially from "standard mode" to "first mode" to "second mode". The second operating unit 14S and the third operating unit 14T are located on the right side of the main body 30. 【0042】 The hair dryer 10 bends at the bending section 24, allowing it to be in an open state and a folded state. As shown in Figures 5 and 6, the bending section 24 has a sliding surface 16, a connecting section 25, a stopper section 26, a first member 50, and a second member 60. 【0043】 As shown in Figure 5, the sliding surface 16 is composed of a main body-side sliding portion 33 and a grip-side sliding portion 42. The main body-side sliding portion 33 is a wall that closes the lower end of the protruding portion 31. The grip-side sliding portion 42 is a wall that closes the upper end of the grip housing 41. 【0044】 The connecting portion 25 is composed of a main body-side connecting portion 34 and a grip-side connecting portion 43. The main body-side connecting portion 34 protrudes downward from the main body-side sliding portion 33. The inner and outer circumferential surfaces of the main body-side connecting portion 34 are cylindrical in shape around the rotation axis 27. A flange portion 35 protruding outward is provided at the lower end of the main body-side connecting portion 34. 【0045】 The grip-side connecting portion 43 is provided on the grip-side sliding portion 42. A connecting hole 44 is formed in the grip-side sliding portion 42. The connecting hole 44 is circular in shape with respect to the rotation axis 27. The main body-side connecting portion 34 fits into the connecting hole 44, and the flange portion 35 hooks onto the periphery of the connecting hole 44 from below. The periphery of the connecting hole 44 on the grip-side sliding portion 42 is the grip-side connecting portion 43. In this way, the grip portion 40 and the main body portion 30 are connected so that they can rotate relative to each other. 【0046】 As shown in Figure 5, the first member 50 and the second member 60 are arranged overlapping in the Y-axis direction. The first member 50 and the second member 60 are housed at the upper end of the grip portion 40. The first member 50 is fixed to the main body housing 32. The second member 60 is fixed to the grip housing 41. 【0047】 The first member 50 and the second member 60 are both made of synthetic resin, molded from polyacetal resin or the like. Both the first member 50 and the second member 60 are ring-shaped (see Figure 7). The centers of the first member 50 and the second member 60 penetrate in the Y-axis direction. An electric wire W is placed in the center of the first member 50 and the second member 60 (see Figure 5). The electric wire W extends through the centers of the first member 50 and the second member 60 to the main body 30 side and the grip 40 side. 【0048】 The first member 50 is fixed to the main body side connecting portion 34 (see Figure 7). A main body side fixing portion 36 for fixing the first member 50 is provided on the lower surface of the main body side connecting portion 34. The main body side fixing portion 36 is recessed upward on the lower surface of the main body side connecting portion 34. Two main body side fixing portions 36 are provided on both the left main body housing 32L and the right main body housing 32R. Figure 7 shows only the left main body housing 32L. 【0049】 The second member 60 is fixed to the upper end of the grip portion 40. The upper end of the grip portion 40 is provided with a grip-side fixing portion 45 for fixing the second member 60. As shown in Figure 6, the grip-side fixing portion 45 has a pair of front and rear side walls 46 and a bottom wall 47. The side walls 46 and the bottom wall 47 protrude from the inner wall surface of the grip housing 41. The grip-side fixing portion 45 is provided on both the left grip housing 41L and the right grip housing 41R (see Figure 13). 【0050】 As shown in Figure 8, the hair dryer 10 can be opened from a folded state by rotating the grip portion 40 in the first direction R1, and opened from the open state by rotating it in the second direction R2, which is opposite to the first direction R1. The first direction R1 is clockwise when viewed from below. The second direction R2 is counterclockwise when viewed from below. The rotation of the grip portion 40 is limited to a maximum of 180 degrees by the stopper portion 26. 【0051】 The stopper portion 26 has a body-side stopper portion 37 and a grip-side stopper portion 48. One body-side stopper portion 37 is provided on the body-side connecting portion 34. The body-side stopper portion 37 is provided on the outer circumferential surface of the flange portion 35 and protrudes outward. 【0052】 The grip-side stopper portion 48 is provided at the upper end of the grip portion 40 (see Figure 6). As shown in Figure 8, the grip-side stopper portion 48 is provided on both the left grip housing 41L and the right grip housing 41R. When the hair dryer 10 is open, the rotation of the grip portion 40 in the first direction R1 is restricted by the contact between the main body-side stopper portion 37 and the grip-side stopper portion 48 of the left grip housing 41L. When the hair dryer 10 is folded, the rotation of the grip portion 40 in the second direction R2 is restricted by the contact between the main body-side stopper portion 37 and the grip-side stopper portion 48 of the right grip housing 41R. The main body-side stopper portion 37 and the grip-side stopper portion 48 of the left grip housing 41L constitute the first stopper portion. The main body-side stopper portion 37 and the grip-side stopper portion 48 of the right grip housing 41R constitute the second stopper portion. 【0053】 As shown in Figures 9 and 10, the first member 50 has an annular portion 51, a protruding portion 52, and a protruding side fixing portion 53. The thickness dimension of the annular portion 51 is approximately constant. The upper and lower surfaces of the annular portion 51 are approximately parallel. 【0054】 The protrusions 52 are provided on the lower surface of the annular portion 51 and protrude downward. There are two protrusions 52. The two protrusions 52 are located 180 degrees opposite each other with respect to the rotation axis 27 (see Figure 11). The two protrusions 52 have a symmetrical shape with respect to the rotation axis 27. 【0055】 The convex fixing portion 53 is provided on the upper surface of the annular portion 51 and protrudes upward. There are four convex fixing portions 53 (see Figure 11). Each convex fixing portion 53 is prism-shaped. The convex fixing portion 53 fits into the main body fixing portion 36. As a result, the movement of the first member 50 in a direction parallel to the sliding surface 16 is restricted. 【0056】 As shown in Figure 11, the positions of the protrusion 52 and the convex-side fixing portion 53 are offset in the circumferential direction (hereinafter simply referred to as the circumferential direction) with respect to the rotation axis 27. The protrusion 52 and the convex-side fixing portion 53 are arranged at equal angular intervals in the circumferential direction. The protrusion 52 and the convex-side fixing portion 53 are positioned closer to the center in the radial direction (hereinafter simply referred to as the radial direction) with respect to the rotation axis 27 within the annular portion 51. 【0057】 As shown in Figures 9 and 10, the second member 60 has an annular portion 61, a recess 62, a displacement portion 63, and a recessed fixing portion 64. In plan view, the annular portion 61 forms an annular shape centered on the rotation axis 27 (see Figure 11). The outer diameter of the annular portion 61 is smaller than the outer diameter of the annular portion 51 of the first member 50. The inner diameter of the annular portion 61 is larger than the inner diameter of the annular portion 51. In plan view, the entire annular portion 61 overlaps with the annular portion 51. The width dimension 61W of the annular portion 61 is smaller than the width dimension 51W of the annular portion 51 (see Figure 12). Both the width dimension 61W of the annular portion 61 and the width dimension 51W of the annular portion 51 are radial dimensions. 【0058】 There are two recesses 62. The recesses 62 are formed between two circumferentially aligned peaks 65. Each recess 62 has an inclined surface 67 that slopes from the top 66 of the adjacent peak 65 toward the lowest point of the recess 62. The inclined surfaces 67 on both sides of the lowest point of the recess 62 are symmetrical with respect to the lowest point of the recess 62 and have equal inclination angles. The depth dimension of the recess 62 is equivalent to the projection dimension of the convex portion 52. The two recesses 62 are located in positions corresponding to the two convex portions 52. The two recesses 62 are located 180 degrees opposite each other with respect to the axis of rotation 27 (see Figure 13). The two recesses 62 have a symmetrical shape with respect to the axis of rotation 27. In plan view, the circumferential dimension of the recess 62 gradually decreases from the outer circumference toward the inner circumference. 【0059】 In the state where the convex portion 52 and the concave portion 62 are fitted together (referred to as the fitted state), the relative rotation of the first member 50 and the second member 60 is restricted. In the fitted state, both circumferential ends of the convex portion 52 and the concave portion 62 are in contact simultaneously. This prevents circumferential play between the convex portion 52 and the concave portion 62 in the fitted state. Two convex portions 52 and two concave portions 62 are provided in the rotational direction of the first member 50 and the second member 60. This allows for a large torque around the rotation axis 27. Specifically, for example, the magnitude of the torque is preferably 500 to 1500 Nmm, and more preferably 600 to 1200 Nmm. 【0060】 The displacement portion 63 is the portion of the annular portion 61 excluding the recess 62 and the recessed fixing portion 64. When the displacement portion 63 transitions between the folded state and the open state (referred to as the transition state), it elastically displaces downward due to contact with the convex portion 52. As shown in Figure 10, the displacement portion 63 is supported and fixed at both ends in the circumferential direction by the recessed fixing portion 64. The displacement portion 63 has a curved shape that gently slopes downward from both ends in the circumferential direction toward the center. Both ends of the displacement portion 63 in the circumferential direction are composed of peaks 65. The displacement portion 63 has a second inclined surface 68 adjacent to the inclined surface 67. The inclination angle of the inclined surface 67 with respect to the sliding surface 16 is steeper than the inclination angle of the second inclined surface 68 with respect to the sliding surface 16. 【0061】 A projection 69 is provided at the lowest point of the displacement portion 63, as shown in Figure 10. The projection 69 protrudes outward (see Figure 12). The tip of the projection 69 is located inward from the outer surface of the annular portion 51 of the first member 50. Both the upper and lower surfaces of the lowest point of the displacement portion 63, including the projection 69, are parallel to the sliding surface 16 (see Figure 9). The projection 69 is supported by a base portion 49 provided on the grip housing 41 (see Figures 5 and 13). 【0062】 As shown in Figures 5 and 13, the base portion 49 protrudes from the inner wall surface of the grip housing 41 and extends in the left-right direction. The base portion 49 is provided on the front and rear sides, corresponding to the two projections 69. Both the front and rear base portions 49 extend from and are connected to both the left grip housing 41L and the right grip housing 41R (see Figure 13). By providing the base portion 49, the second member 60 deforms radially while being supported by the base portion 49. Since the second member 60 is supported at both ends, the force applied when the second member 60 deforms is distributed to two points, thereby improving the durability of the second member 60 while ensuring a large torque. 【0063】 As shown in Figure 5, the front base portion 49 extends from the front to the rear of the grip housing 41. The front base portion 49 is wall-shaped with a wall surface parallel to the sliding surface 16. The rear base portion 49 rises upward. The rear base portion 49 is wall-shaped with a wall surface parallel to the rotation axis 27. Both the front and rear base portions 49 are thin. This prevents the corresponding portion of the grip housing 41 from becoming thick and prevents the occurrence of sink marks. 【0064】 As shown in Figure 10, the recessed fixing portion 64 is provided on both sides of the displacement portion 63 in the circumferential direction. Each recessed fixing portion 64 has a shape that protrudes outward. The recessed fixing portion 64 is located directly below the recess 62 (see Figure 9). The recessed fixing portion 64 is block-shaped and longer in the vertical direction than in the circumferential direction. Both sides of the recessed fixing portion 64 in the circumferential direction are parallel. As shown in Figure 13, the recessed fixing portion 64 fits between the side walls 46 of the grip-side fixing portion 45. This restricts the movement of the second member 60 in the direction parallel to the sliding surface 16. 【0065】 As shown in Figure 14, the second member 60 has an inclined surface 71 that slopes downward from the radial outer circumference towards the inner circumference. The inclined surface 71 is provided around the entire circumference of the upper surface of the second member 60. The inclination angle of the inclined surface 71 with respect to the sliding surface 16 changes in the circumferential direction. The inclination angle of the inclined surface 71 is greatest at the position of the peak 66 of the peak 65. By providing the inclined surface 71, the torque can be increased. 【0066】 As shown in Figure 4, the control unit 21 comprises a control board 21S and a plurality of electronic components mounted on the control board 21S. The control board 21S is fixed to the main body housing 32. The electronic components include memory components such as EEPROM and RAM, and a microcomputer. The memory components store computer programs and various parameters for performing various operating modes. The microcomputer controls the blower unit 18 and the heating unit 19 in accordance with various operating modes by executing the computer programs stored in the memory components. The control unit 21 measures the internal temperature of the front end of the main body 30 using the second temperature sensor 29, and if the temperature becomes high (for example, 105°C or higher), it determines that the temperature is abnormal and stops the power supply to the heating unit 19. 【0067】 As shown in Figures 20 and 21, the control unit 21 appropriately executes the first control and the second control in "HOT mode". The first control and the second control are programmed according to the ambient temperature T, airflow rate, and operating mode, respectively. The ambient temperature T is measured by the first temperature sensor 28. The airflow rate and operating mode are selected by the user. The first control and the second control are controlled based on temperatures T1 and T2. Temperatures T1 and T2 are set lower when the airflow rate is low than when it is high. Specifically, in "LOW mode", T1=20℃ and T2=35℃, and in "HIGH mode", T1=25℃ and T2=40℃. In "HIGH mode", the airflow rate is high, so the time the air is heated by the heating unit 19 is short. In "LOW mode", the airflow rate is slow, so the time the air is heated by the heating unit 19 is long. Taking these into consideration, the reference temperatures for "HIGH mode" and "LOW mode" are set to different temperatures. 【0068】 The first control controls the output of the heating element. The first control changes the output of the heating element according to the on-duty ratio (referred to as Duty). Duty is the ratio of the on-period τ to one on / off cycle of energizing the heating element. Duty is pre-stored corresponding to the ambient temperature T and airflow. In each operating mode, Duty is set to be larger when the ambient temperature T is lower than when it is higher, with temperature T1 as the boundary. 【0069】 The Duty Cycle is high when the airflow is large (strong) and low when the airflow is small (weak). When the airflow is large, the air sent from the blower unit 18 passes through the heating unit 19 in a short time. By increasing the Duty Cycle, the temperature of the air can be raised to the target temperature for each operating mode. When the airflow is small, it takes a long time for the air sent from the blower unit 18 to pass through the heating unit 19. By decreasing the Duty Cycle, it is possible to prevent the temperature of the hot air from becoming too high. 【0070】 The second control switches between the warm air operation and the cold air operation. The second control switches between the warm air operation and the cold air operation according to the warm air operation time Th and the cold air operation time Tc. The switching between the warm air operation and the cold air operation is repeated. The warm air operation time Th and the cold air operation time Tc are stored in advance corresponding to the outside air temperature T and the air volume. 【0071】 The warm air operation time Th and the cold air operation time Tc are different with the temperature T2 as the boundary in each use mode. When the outside air temperature T is lower than the temperature T2 in each use mode, the warm air operation time Th is longer than the cold air operation time Tc. When the outside air temperature T is higher than the temperature T2, the warm air operation time Th and the cold air operation time Tc are equal. 【0072】 An example of the control in each use mode will be described. In the "standard mode", the control unit 21 executes the first control and does not execute the second control. When the air volume is in the "LOW mode", Duty = 2 / 3. When the air volume is in the "HIGH mode", Duty = 1. 【0073】 In the "first mode" suitable for drying the scalp and the roots of the hair, the control unit 21 executes the first control and the second control. When the air volume is in the "LOW mode", Duty = 1 / 2, Th = 2s, Tc = 1s when T < T1; Duty = 1 / 3, Th = 2s, Tc = 1s when T1 < T < T2; Duty = 1 / 3, Th = 2s, Tc = 2s when T2 < T. When the air volume is in the "HIGH mode", Duty = 2 / 3, Th = 2s, Tc = 1s when T < T1; Duty = 1 / 2, Th = 2s, Tc = 1s when T1 < T < T2; Duty = 1 / 2, Th = 2s, Tc = 2s when T2 < T. 【0074】 In the "second mode" suitable for drying hair first, the control unit 21 executes the first control and the second control. When the air volume is in the "LOW mode", Duty = 2 / 3, Th = 2s, Tc = 1s when T < T1, Duty = 1 / 2, Th = 2s, Tc = 1s when T1 < T < T2, and Duty = 1 / 2, Th = 2s, Tc = 2s when T2 < T. When the air volume is in the "HIGH mode", Duty = 1, Th = 2s, Tc = 1s when T < T1, Duty = 3 / 4, Th = 2s, Tc = 1s when T1 < T < T2, and Duty = 3 / 4, Th = 2s, Tc = 2s when T2 < T. 【0075】 It is desirable to set the denominator of Duty to 4 or less. This can make it difficult to generate the flicker phenomenon. 【0076】 Next, an example of the usage method of the hair dryer 10 in this embodiment will be described. When changing the hair dryer 10 from the folded state to the unfolded state, rotate the grip portion 40 in the first direction R1. Due to the rotational force applied to the grip portion 40, the inclined surface 67 of the recess 62 and the convex portion 52 strongly hit each other. Since the inclination angle of the inclined surface 67 is relatively tight, a large torque is required to release the fitting state. As the torque increases, the recess 62 detaches from the convex portion 52, and the displacement portion 63 elastically displaces downward by hitting the convex portion 52. The protruding piece 69 hits the pedestal portion 49 and is supported. In a state where the second inclined surface 68 and the convex portion 52 are in contact, the second member 60 rotates. Since the inclination of the second inclined surface 68 is relatively gentle, the second member 60 rotates smoothly. Immediately before the hair dryer 10 reaches the unfolded state, the mountain portion 65 hits the convex portion 52, the elastic displacement amount of the displacement portion 63 increases, and the protruding piece 69 is supported by the pedestal portion 49. Thereafter, the mountain portion 65 gets over the convex portion 52, the recess 62 reaches the position of the convex portion 52, the displacement portion 63 elastically returns, and the fitting state is achieved. At the same time, the hair dryer 10 becomes the unfolded state and is held in that state. Here, when trying to further rotate the grip portion 40 in the first direction R1, as shown in FIG. 8, the grip-side stopper portion 48 of the left grip housing 41L hits the main body-side stopper portion 37, restricting further rotation. 【0077】 When the hair dryer 10 is moved from the open position to the folded position, the grip portion 40 is rotated in the second direction R2. The second member 60 undergoes elastic displacement during the transition, similar to when moving from the folded position to the open position. The convex portion 52 and concave portion 62 engage when the dryer is folded, stopping the rotation of the grip portion 40. If the grip portion 40 is to be rotated further in the second direction R2, the grip-side stopper portion 48 of the right-side grip housing 41R contacts the main body-side stopper portion 37, limiting further rotation. 【0078】 Because the folded hair dryer 10 is compact, it can be easily stored. Also, using the folded hair dryer 10 makes it easier to direct the airflow to a desired spot. Specifically, you can put your hand into the space 17 of the folded hair dryer 10 and grasp the main body 30. By grasping it near the air outlet 11, you can precisely direct the air outlet 11 to your desired direction. 【0079】 Next, the operation and effects of the embodiment configured as described above will be explained. The hair dryer 10 comprises a main body 30 and a grip portion 40. The grip portion 40 is rotatable about a rotation axis 27 perpendicular to the sliding surface 16. The hair dryer 10 bends between a folded state and an open state by the rotation of the grip portion 40. The bend portion 24 of the hair dryer 10 has a first member 50 and a second member 60. The first member 50 is fixed to the main body housing 32 and has a protrusion 52. The second member 60 is fixed to the grip housing 41 and has a recess 62. The first member 50 and the second member 60 are arranged overlapping in a direction perpendicular to the sliding surface 16. At least one of the first member 50 and the second member 60 elastically deforms when transitioning between the folded state and the open state. The protrusion 52 and the recess 62 fit together in the folded state and the open state, restricting the rotation of the grip portion 40. 【0080】 In this configuration, the first member 50 and the second member 60 are arranged in a direction perpendicular to the sliding surface 16. Here, for example, if two ring-shaped members are arranged radially on the inside and outside, the radial dimension of the bent portion tends to be large. However, since the first member 50 and the second member 60 of the hair dryer 10 are arranged in a direction perpendicular to the sliding surface 16, the radial dimension of the bent portion 24 can be reduced, thereby making the bent portion 24 of the hair dryer 10 thinner. 【0081】 Furthermore, the sliding surface 16 intersects diagonally in the direction of extension of the grip portion 40. With this configuration, the user can hook their hand into the U-shaped portion between the main body portion 30 and the grip portion 40. 【0082】 Furthermore, both the first member 50 and the second member 60 are ring-shaped. The central parts of the first member 50 and the second member 60 penetrate in a direction perpendicular to the sliding surface 16. With this configuration, the electric wire W can be routed on the inner circumference side of the first member 50 and the second member 60, so the bent portion 24 of the hair dryer 10 can be made thinner than when the electric wire W is routed on the outer circumference side of the first member 50 and the second member 60. 【0083】 Furthermore, in the first member 50, the position of the protrusion 52 and the position of the protrusion-side fixing portion 53 are offset in the circumferential direction around the rotation axis 27. With this configuration, the force applied to the first member 50 can be distributed, thereby improving the durability of the first member 50. 【0084】 Furthermore, the second member 60 has a displacement portion 63 and a recessed fixing portion 64. The recessed fixing portion 64 is provided on both sides of the displacement portion 63 in the circumferential direction centered on the rotation axis 27. With this configuration, since the displacement portion 63 is supported at both ends by the recessed fixing portion 64, the torque can be increased while ensuring the strength of the second member 60. 【0085】 Furthermore, the grip housing 41 has a base portion 49 that supports the displacement portion 63. With this configuration, since the displacement portion 63 is supported by the base portion 49 of the housing, the durability of the member having the recess 62 can be improved and the torque can be increased. 【0086】 Furthermore, the recess 62 has an inclined surface 67 that is inclined in the circumferential direction with respect to the rotation axis 27. With this configuration, the protrusion 52 moves along the inclined surface 67, allowing the grip portion 40 to rotate smoothly. 【0087】 Furthermore, the second member 60 has a second inclined surface 68 adjacent to the inclined surface 67. The inclination angle of the inclined surface 67 with respect to the sliding surface 16 is steeper than the inclination angle of the second inclined surface 68 with respect to the sliding surface 16. With this configuration, the torque required to release the folded or open state is greater than the torque required to put it into the folded or open state. Therefore, it is difficult to unintentionally release the folded or open state. 【0088】 Furthermore, the hair dryer 10 can be opened from a folded state by rotating the grip portion 40 in a first direction R1, and opened from an open state by rotating it in a second direction R2 opposite to the first direction R1. The main body housing 32 and the grip housing 41 have a first stopper portion (grip-side stopper portion 48 and main body-side stopper portion 37 of the left grip housing 41L) that restricts rotation from the open state to the first direction R1, and a second stopper portion (grip-side stopper portion 48 and main body-side stopper portion 37 of the right grip housing 41R) that restricts rotation from the folded state to the second direction R2. With this configuration, the rotation range of the grip portion 40 can be restricted, making it easier to use. In addition, since the rotation range of the main body housing 32 and the grip housing 41 can be restricted, excessive twisting of the internal wire W can be prevented, preventing the wire W from coming loose or breaking. 【0089】 Furthermore, the control unit 21 of the hair dryer 10 controls the temperature of the target object (scalp, hair roots, hair tips, etc.) by combining first and second controls based on the ambient temperature T and airflow rate. The first control controls the output of the heating element according to the duty cycle. The second control switches between hot air operation and cold air operation. With this configuration, the temperature of the target object can be set within a narrow temperature range. When the ambient temperature T is high, the temperature of the hair tends to rise rapidly, and when the ambient temperature T is low, the hair temperature is also cold and it takes time for the temperature to rise. Therefore, it is important to consider the ambient temperature T in order to bring the target object to the desired temperature. Also, when the airflow rate is high, the air sent from the blower unit 18 passes through the heating unit 19 in a short time, so the temperature of the air does not rise easily. When the airflow rate is low, the air sent from the blower unit 18 takes a long time to pass through the heating unit 19, so the temperature of the hot air rises easily. Therefore, it is important to consider the airflow rate in order to bring the target object to the desired temperature. 【0090】 When temperature control is performed solely by the first control, it is possible to precisely control the target object's set temperature. However, in order to precisely control the output of the heating element using the Duty cycle, the denominator of the Duty cycle needs to be large. This makes flicker more likely to occur, so fine control of the target object's set temperature using the Duty cycle is undesirable. 【0091】 When temperature control is performed solely by the second control system, there is a problem in that it is difficult to maintain a constant temperature for the object. This is because if hot air operation is continued without changing the duty cycle, the temperature of the object tends to rise rapidly. In order to maintain a constant temperature for the object, it is necessary to extend the time of cold air operation. This results in a large fluctuation in the temperature of the air, causing a large deviation from the target temperature of the object, which negatively impacts the user's experience. 【0092】 However, the control unit 21 combines a first control that controls the output of the heating element according to the duty cycle, and a second control that switches between hot air operation and cold air operation. This allows for precise temperature setting of the object without negatively impacting the user experience while suppressing the occurrence of flicker. Specifically, the control unit 21 can set the temperature of the object within a narrow temperature range, specifically within ±5°C of the target temperature value. Furthermore, to quickly return the object to the target temperature when it deviates from the target temperature, the control unit can use the first control to rapidly increase the temperature and the second control to rapidly decrease the temperature. 【0093】 <Example 2> Next, the first member 100 and the second member 101 of the hair dryer according to Embodiment 2, which embodies the present invention, will be described with reference to Figures 15 and 16. Note that components similar to those in Embodiment 1 are denoted by the same reference numerals, and redundant explanations are omitted. 【0094】 The hair dryer according to this embodiment includes a main body 30 and a grip portion 40, similar to Embodiment 1. The grip portion 40 is rotatable about a rotation axis 27 perpendicular to the sliding surface 16, similar to Embodiment 1. 【0095】 The first member 100 and the second member 101 are arranged in a manner perpendicular to the sliding surface 16, as in Embodiment 1. Both the first member 100 and the second member 101 are ring-shaped, as in Embodiment 1. 【0096】 The first member 100 is fixed to the grip housing 41. The first member 100 has an annular portion 51, a protrusion 52, and a protrusion-side fixing portion 53. 【0097】 The protrusion 52 is provided on the upper surface of the annular portion 51 and protrudes one level upward. Two protrusions 52 are provided, as in Embodiment 1 (see Figure 16). In a plan view, the protrusion 52 has a vertex 102 that protrudes radially inward. In a plan view, the width dimension (circumferential dimension) of the protrusion 52 gradually decreases toward the vertex 102. In a plan view, the circumferential surface of the protrusion 52 is curved. 【0098】 The convex fixing portion 53 is provided on the lower surface of the annular portion 51 and protrudes downward. The position of the convex portion 52 and the position of the convex fixing portion 53 are offset in the circumferential direction, as in Embodiment 1. 【0099】 The second member 101 is fixed to the main housing 32. The second member 101 has an annular portion 61, a base portion 103, a recess 62, and a recessed fixing portion 64. The thickness dimension of the annular portion 61 is approximately constant. The base portion 103 is provided on the lower surface of the annular portion 61. The base portion 103 protrudes one level downward. Two base portions 103 are provided (see Figure 16). The two base portions 103 have a symmetrical shape around the rotation axis 27. 【0100】 The two recesses 62 are positioned in the same location as the two protrusions 52 as in Embodiment 1. One recess 62 is formed on the outer circumference of each of the two base portions 103. The recesses 62 have a shape that is recessed radially inward. The recesses 62 have two inclined surfaces 67, as in Embodiment 1. 【0101】 The outer circumferential surface of the base portion 103 has a guide surface 104 adjacent to the recess 62. The guide surface 104 is inclined to guide the convex portion 52 toward the recess 62. 【0102】 When the grip portion 40 is rotated in the first direction R1 or the second direction R2, the protrusion 52 and the base portion 103 come into contact, causing the first member 100 and the second member 101 to undergo elastic displacement, and the protrusion 52 and the recess 62 to engage or disengage. 【0103】 As described above, in this embodiment, similar to Embodiment 1, the first member 100 and the second member 101 are arranged to overlap in a direction perpendicular to the sliding surface 16, so the bent portion 24 of the hair dryer can be made thinner. 【0104】 <Example 3> Next, the first member 110 and the second member 111 of the hair dryer according to Embodiment 3, which embodies the present invention, will be described with reference to Figure 17. Note that components similar to those in Embodiment 1 are denoted by the same reference numerals, and redundant explanations are omitted. 【0105】 The hair dryer according to this embodiment includes a main body 30 and a grip portion 40, similar to Embodiment 1. The grip portion 40 is rotatable about a rotation axis 27 perpendicular to the sliding surface 16, similar to Embodiment 1. 【0106】 The first member 110 and the second member 111 are arranged in a manner perpendicular to the sliding surface 16, similar to the first embodiment. Both the first member 110 and the second member 111 are ring-shaped, similar to the first embodiment. 【0107】 The first member 110 is fixed to the grip housing 41. The first member 110 has an annular portion 51, a protrusion 52, and a protrusion-side fixing portion 53. The thickness dimension of the annular portion 51 is approximately constant. 【0108】 The protrusion 52 is provided on the upper surface of the annular portion 51 and protrudes one level upward. Similar to Embodiment 1, there are two protrusions 52. The upper surface of the protrusion 52 is curved in an arc shape when viewed from the side. 【0109】 The convex fixing portion 53 is provided on the lower surface of the annular portion 51 and protrudes downward. The position of the convex portion 52 and the position of the convex fixing portion 53 are offset in the circumferential direction, as in Embodiment 1. 【0110】 The second member 111 is fixed to the main body housing 32. The second member 111 has an annular portion 61, a recess 62, and a recessed fixing portion 64. The thickness dimension of the annular portion 61 is approximately constant. The recess 62 is provided on the lower surface of the annular portion 61. The recess 62 is formed between two peaks 65, similar to Embodiment 1. The recess 62 is recessed upward between the peaks 65. The recess 62 has two inclined surfaces 67, similar to Embodiment 1. The two inclined surfaces 67 have equal inclination angles, similar to Embodiment 1. The two recesses 62 are provided at positions corresponding to the two protrusions 52, similar to Embodiment 1. The peaks 65 have a second inclined surface 68 adjacent to the recess 62 in the circumferential direction, similar to Embodiment 1. The second inclined surface 68 has a gentler inclination angle than the inclined surface 67, similar to Embodiment 1. 【0111】 When the grip portion 40 is rotated in the first direction R1 or the second direction R2, the convex portion 52 and the ridge portion 65 come into contact with each other, causing the first member 110 and the second member 111 to undergo elastic displacement, and the convex portion 52 and the recessed portion 62 to engage or disengage. 【0112】 As described above, in this embodiment, similar to Embodiment 1, the first member 110 and the second member 111 are arranged in a direction perpendicular to the sliding surface 16, so that the bent portion 24 of the hair dryer can be made thinner. 【0113】 <Example 4> Next, the first member 120 and the second member 121 of the hair dryer according to Embodiment 4, which embodies the present invention, will be described with reference to Figures 18 and 19. Note that components similar to those in Embodiment 1 are denoted by the same reference numerals, and redundant explanations are omitted. 【0114】 The hair dryer according to this embodiment includes a main body 30 and a grip portion 40, similar to Embodiment 1. The grip portion 40 is rotatable about a rotation axis 27 perpendicular to the sliding surface 16, similar to Embodiment 1. 【0115】 The first member 120 and the second member 121 are arranged in a manner perpendicular to the sliding surface 16, as in Embodiment 1. Both the first member 120 and the second member 121 are ring-shaped, as in Embodiment 1. 【0116】 The first member 120 is fixed to the grip housing 41. The first member 120 has an annular portion 51, a protrusion 52, and a protrusion-side fixing portion 53. The thickness dimension of the annular portion 51 is approximately constant. 【0117】 The protrusion 52 is provided on the upper surface of the annular portion 51 and protrudes one level upward. As in Embodiment 1, there are two protrusions 52. The protrusion 52 has a hemispherical dome shape. In a side view, the upper surface of the protrusion 52 is curved in an arc shape. In a plan view, the protrusion 52 has a circular shape (see Figure 19). 【0118】 The convex fixing portion 53 is provided on the lower surface of the annular portion 51 and protrudes downward. The position of the convex portion 52 and the position of the convex fixing portion 53 are offset in the circumferential direction, as in Embodiment 1. 【0119】 The second member 121 is fixed to the main housing 32. The second member 121 has an annular portion 61, a recess 62, and a recessed fixing portion 64. The thickness dimension of the annular portion 61 is approximately constant. 【0120】 The recess 62 is provided on the lower surface of the annular portion 61. As shown in Figure 19, the recess 62 is formed on the inner circumference of two adjacent peaks 65. The two peaks 65 are provided on the outer peripheral edge of the annular portion 61. The recess 62 is recessed on the outer peripheral side. In plan view, the recess 62 is arc-shaped. The recess 62 has two inclined surfaces 67. The two inclined surfaces 67 are connected to form an arc. The two recesses 62 are positioned in a manner corresponding to the two protrusions 52, similar to Embodiment 1. The peaks 65 have a guide surface 122. The guide surface 122 is curved to guide the protrusions 52 into the recess 62. In plan view, the guide surface 122 is arc-shaped. 【0121】 When the grip portion 40 is rotated in the first direction R1 or the second direction R2, the protrusion 52 and the peak 65 come into contact with each other, causing the first member 120 and the second member 121 to undergo elastic displacement, and the protrusion 52 and the recess 62 to engage or disengage. 【0122】 As described above, in this embodiment, similar to Embodiment 1, the first member 120 and the second member 121 are arranged in a direction perpendicular to the sliding surface 16, so that the bent portion 24 of the hair dryer can be made thinner. 【0123】 <Other examples> The present invention is not limited to the embodiments described above and in the drawings, and the following embodiments, for example, are also included in the technical scope of the present invention. (1) In the above embodiment, the base portion 49 is integrally formed with the grip housing 41. However, the base portion may be formed separately from the grip housing and assembled to the grip housing. (2) In the above embodiment, the inclination angles of the two inclined surfaces 67 formed in one recess 62 are equal. However, the inclination angles of the two inclined surfaces formed in one recess may be different. In this case, the inclination angles of the inclined surfaces of two recesses that are arranged on a diagonal line passing through the axis of rotation in a plan view may be equal. (3) In the above embodiment, the rotation of the grip portion is limited to a maximum of 180 degrees. However, the rotation of the grip portion may be limited to an angle other than 180 degrees, or it may not be limited at all. (4) In the above embodiment, the annular portion 51 of the first member 50 and the annular portion 61 of the second member 60 are connected around their entire circumference. However, there may be a cut in a part of the circumferential direction of either the annular portion of the first member or the annular portion of the second member or both. In other words, a part of the circumferential direction of either annular portion may be cut, and the central part may be open in the radial direction. (5) In the above embodiment, the entire annular portion 61 overlaps with the annular portion 51. However, it is not limited to this, and a part of the annular portion of the second member does not have to overlap with the annular portion of the first member. Alternatively, the entire annular portion of the first member may overlap with the annular portion of the second member. (6) In the above embodiment, numerical values ​​related to airflow and air temperature were given as examples, but these may be changed as appropriate. (7) In the above embodiment, specific values ​​for Duty, hot air operation time Th, and cold air operation time Tc were given as examples, but these may be changed as appropriate. (8) In the above embodiment, the sliding surface 16 intersects the extension direction of the grip portion 40 at an oblique angle. However, the sliding surface may be parallel to the extension direction of the grip portion. Specifically, the sliding surface may be parallel to the XY plane, and the rotation axis of the grip portion may extend in the Z-axis direction. In this case, the first member and the second member may be arranged on either side of the central axis of the grip portion in an arrangement that overlaps in the extension direction of the rotation axis. [Explanation of symbols] 【0124】 R1…first direction R2…Second direction 10… Hair dryer 16…Sliding surface 24...Bend 27…Axis of rotation (axis) 30...Main body 37...Main body side stopper part 40…Grip section 48... Grip-side stopper part 49... Base 50, 100, 110, 120… First component 52…Convex part 53…Convex side fixing part 60, 101, 111, 121… Second component 62…recess 63...Displacement part 64…Concave side fixing part 67…Slope surface 68...Second inclined surface

Claims

[Claim 1] It consists of a main body and a grip, The grip portion of the hair dryer is a hair dryer that bends between a folded state and an open state by rotating around an axis perpendicular to the sliding surface formed between it and the main body, The bent portion of the hair dryer comprises a first member fixed to one of the housings of the main body and the grip portion and having a protrusion, and a second member fixed to the other housing of the main body and the grip portion and having a recess. The first and second members are arranged in a direction perpendicular to the sliding surface, and at least one of the first and second members elastically deforms when transitioning between the folded state and the open state, and the convex and concave portions fit together in the folded state and the open state, restricting the rotation of the grip portion. The recess has an inclined surface that is tilted in the circumferential direction with respect to the axis, in a hair dryer. [Claim 2] The hair dryer according to claim 1, wherein the sliding surface intersects the extension direction of the grip portion at an oblique angle. [Claim 3] The hair dryer according to claim 1, wherein both the first member and the second member are ring-shaped, and the central parts of the first member and the second member penetrate in a direction perpendicular to the sliding surface. [Claim 4] The hair dryer according to claim 1 or claim 2, wherein in the first member, the position of the protrusion and the position of the convex fixing portion fixed to one of the housings are offset in the circumferential direction with respect to the axis. [Claim 5] The second member has a displacement portion that undergoes elastic displacement upon contact with the convex portion, and a recessed fixing portion that is fixed to the other housing. The hair dryer according to claim 1 or claim 2, wherein the recessed fixing portion is provided on both sides of the displacement portion in the circumferential direction with respect to the axis. [Claim 6] The hair dryer according to claim 5, wherein the other housing has a base portion that supports the displacement portion. [Claim 7] The second member has a second inclined surface adjacent to the inclined surface, The hair dryer according to claim 1 or claim 2, wherein the inclination angle of the inclined surface with respect to the sliding surface is steeper than the inclination angle of the second inclined surface with respect to the sliding surface. [Claim 8] By rotating the grip portion in the first direction, it moves from the folded state to the open state, and by rotating it in the second direction opposite to the first direction, it moves from the open state to the folded state. The hair dryer according to claim 1 or claim 2, wherein the housing of the main body and the housing of the grip have a first stopper portion that restricts rotation in the first direction from the open state and a second stopper portion that restricts rotation in the second direction from the folded state.

Images