CN117042651A - Diffuser - Google Patents

Abstract

The present invention can properly output air toward the hair or head. In the diffuser, as an output portion for outputting air, a plurality of blow-out holes 17 are provided in the blow-out surface portion 15, 1 or 2 side holes 18 are provided in the plurality of protrusions 16, the plurality of protrusions 16 are arranged on the 1 st annular line M1 and the 2 nd annular line M2 surrounding the reference point P in front side view, and the blow-out holes 17b provided in a region near the 1 st protrusion 16a in front side view are formed by truncated cone-shaped holes, whereas the blow-out holes 17a provided in another region farther from the reference point P than the region are formed by making the shapes different by columnar hole shapes.

Description

Diffuser

Technical Field

The present invention relates to a diffuser that can be used as an accessory part of a blower.

Background

Conventionally, as an accessory component of a blower, a diffuser attached to an outlet portion of air is known. By outputting air from the blower through the diffuser, air that is widely diffused can be blown to the hair. As this diffuser, a diffuser in which an air outlet is provided in a baffle plate as a main body portion, a grill as a blowout face portion, and a protruding portion protruding from the grill has been proposed (for example, refer to patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2017-6664.

Disclosure of Invention

Problems to be solved by the invention

However, there is still a possibility of improvement in the structure for outputting air from the blower through the diffuser.

The present invention has been made to solve the above-mentioned problems. That is, it is intended to provide a diffuser capable of appropriately outputting air toward hair or the head.

Means for solving the problems

The diffuser (10) according to claim 1, which is attached to an output portion for outputting air from a blower (11), and which is capable of diffusing and outputting air output from the blower (11), is characterized by comprising:

an inlet (13) for inputting air output from the blower (11);

a tubular main body (14) that forms an internal space in which the inlet (13) is formed at one end and the inner diameter gradually increases toward the output (12) formed at the other end;

a blowout surface portion (15) formed in a surface shape that blocks the other end side of the main body portion (14), and provided with a plurality of blowout holes (17) along the 1 st direction from the inlet portion (13) toward the output portion (12); and

a plurality of protrusions (16) protruding from the outer surface side of the blowout surface portion (15) toward the 1 st direction side,

in the plurality of protrusions (16),

a side hole (18) formed by opening from the inner surface side of the blow-out surface portion (15) to at least the 2 nd direction side crossing the 1 st direction continuously through an inner passage (19) inside each protrusion (16),

the plurality of protrusions (16) have:

a1 st protrusion (16 a) disposed on a1 st annular line (M1) surrounding a predetermined reference point when viewed from a predetermined front side of the blowout face (15) in the 1 st direction; and

a2 nd protrusion (16 b) disposed on a virtual 2 nd annular line (M2) which is separated from the predetermined reference point to a greater extent than the 1 st annular line (M1) and surrounds the predetermined reference point,

at least one of the shapes and the sizes of the blow-out holes (17) or at least one of the side holes (18) provided in a2 nd region farther from the predetermined reference point than the 1 st region is formed differently from at least one of the blow-out holes (17) or the side holes (18) provided in the 1 st region close to the 1 st protrusion (16 a) when viewed from the front side.

The diffuser (10) according to claim 2 is characterized in that, as the blowout holes (17), a plurality of kinds of blowout holes (17) having different minimum areas through which air can pass are provided, and a plurality of blowout holes (17) having a large minimum area are provided in another area (A3) distant from the predetermined reference point with respect to the blowout holes (17) provided in the predetermined area (A1) close to the predetermined reference point, the diffuser (10) according to claim 1.

In the diffuser (10) according to claim 3, the diffuser (10) according to claim 1 or 2 is characterized in that, as the predetermined region (B1) in which the plurality of air outlet holes (17) are provided at positions close to the predetermined reference point, a region in which the ratio of the areas of the air outlet holes (17) into which air enters from the internal space surrounded by the main body (14) is smaller than the other region (B2) distant from the predetermined reference point is provided.

The diffuser (10) according to claim 4 is characterized in that, as the predetermined region (C3) in which the blowout hole (17) is provided, a region having a wide hole pitch is provided between 2 regions (C1, C2) having a narrow hole pitch in the circumferential direction with respect to the predetermined reference point when viewed from the predetermined front side, in the diffuser (10) according to any one of claims 1 to 3.

In addition, regarding the diffuser (10) described in claim 5, the diffuser (10) described in any one of claims 1 to 4 is characterized in that, in the protrusion (16), the protrusion (16) provided with 1 side hole (18) and the protrusion (16) provided with 2 side holes (18) are formed of a shape in which a portion corresponding to the side hole (18) is cut out with respect to substantially the same basic shape, and the side hole (18) of the protrusion (16) provided with 2 side holes (18) is formed of a shape in which a concave portion of an area smaller than that of the side hole (18) of the protrusion (16) provided with 1 side hole (18) is cut out or a shape in which a concave portion of an acute V-shape is cut out in the front side view.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the diffuser (10) of the present invention, the ease with which air passes through the 1 st region near the predetermined reference point and the 2 nd region distant from the predetermined reference point can be made different, and therefore even if the distance from the predetermined reference point changes, the wind force (or wind velocity) of the air output from at least either the blowout hole (17) of the blowout face (15) or the side surface hole (18) of the protrusion (16) can be made nearly uniform. Accordingly, the air output to the hair or the head can be made to be nearly uniform over a wide range, and drying of the hair, massaging of the head, and the like can be easily performed.

Drawings

Fig. 1 (a) is a perspective view of the diffuser of the present invention, fig. 1 (b) is a schematic view showing a state in which the diffuser is mounted to a blower, and fig. 1 (c) is a view of the diffuser from the back side.

Fig. 2 (a) is a front view of the diffuser, and fig. 2 (b) is a view showing an inner surface side of the blowout face portion.

Fig. 3 is a sectional view on the Sb-Sb line of fig. 2 (a), and fig. 3 (b) is a sectional view on the Sa-Sa line of fig. 2 (a).

Fig. 4 (a) is a view of the blowout face portion viewed from the outer surface side, and fig. 4 (b) is a view of the blowout face portion viewed from the inner surface side.

Fig. 5 (a) is a partially enlarged view of the blow-out face portion viewed from the outer surface side, and fig. 5 (b) is a partially enlarged view of the blow-out face portion viewed from the inner surface side.

Fig. 6 is a view of the blown-out face portion as seen from the outer surface side.

Fig. 7 is a schematic view for explaining the shape of the protrusion.

Detailed Description

The diffuser 10 of the present invention is configured so that air output toward hair or the head can be brought into a nearly uniform state over a wide range. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

< basic constitution of diffuser 10 >

Fig. 1 (a) is a perspective view of the diffuser 10 of the present invention, fig. 1 (b) is a schematic view showing a state in which the diffuser 10 is attached to the blower 11, and fig. 1 (c) is a view of the diffuser 10 from the back side. In addition, in fig. 1 and thereafter, when the protrusion 16, the blowout hole 17, and the side surface hole 18 are provided in a plurality of locations, only a part of the numbers are given, and a part of the numbers are omitted. In addition, in fig. 1 (b), for reference, a blower 11 capable of mounting one example of the diffuser 10 is illustrated with a thin line.

As shown in fig. 1 (b), the diffuser 10 is an accessory part of the blower 11, which is capable of diffusing the air output from the blower 11 and outputting from the output portion 12 by being attached to the output portion from which the air is output from the blower 11.

The diffuser 10 includes: an inlet portion 13 for inputting air output from the blower 11; a main body 14 having an inlet 13 formed at one end (the rear end in the air blowing direction); and an output unit 12 provided on the other end side (front end side in the air blowing direction) of the main body unit 14. The output unit 12 is provided with a blowout face 15 formed in a face shape that blocks the other end side of the main body 14, and a plurality of protrusions 16 protruding from the blowout face 15, and hole portions provided in the blowout face 15 and the protrusions 16 function as the output unit 12 that outputs air. In the following, a side of the main body 14 where the blowout surface 15 is provided is referred to as a front side, and a side where the inlet 13 is provided is referred to as a rear side.

The main body 14 is a cylindrical portion forming an internal space as follows: the inner diameter dimension is gradually increased toward the front side where the output portion 12 is formed with respect to the rear side where the inlet portion 13 is formed. By gradually expanding the internal space of the main body 14, air can be ejected from the entire blowout surface portion 15 having an area larger than the area of the inlet portion 13. The diffusion angle D1 at which the internal space is enlarged is set to be substantially 45 degrees or more on both sides with respect to the air traveling direction Y1, and the relative angle (diffusion angle D1) of the wall that is the inner side of the main body 14 is set to be substantially 90 degrees or more (108 degrees in the present embodiment).

Although it is preferable that the diffuser 10 be made smaller as the diffusion angle D1 is set larger, if the diffusion angle D1 is set larger, a difference in the air output (wind force) tends to occur between the central portion and the end portion of the blowout face portion 15. In contrast, in the diffuser 10 of the present invention, the shapes of the air outlet hole 17 provided in the air outlet surface portion 15 and the side surface hole 18 provided in the protrusion 16 are set to a plurality of different shapes, and thus the air can be output by nearly uniform wind power over a wide range in the output portion 12 while setting the diffusion angle D1 to be large.

The blowout surface portion 15 is formed in a planar shape having a thickness along the air traveling direction so as to block the front side of the main body portion 14. The blowout surface portion 15 is provided with a plurality of blowout holes 17 along the air traveling direction (1 st direction) from the inlet portion 13 toward the output portion 12. The plurality of blowout holes 17 are set to a plurality of types of shapes corresponding to the arrangement positions, and details will be described later with reference to fig. 3.

The plurality of protrusions 16 are provided so as to protrude from the outer surface side of the blowout surface portion 15 along the air traveling direction Y1. The plurality of protrusions 16 are provided with internal passages 19 (see fig. 3) passing from the inner surface side of the blowout surface 15 to the inner side of each protrusion, and side holes 18 capable of outputting air are provided as part of the output section 12 on the side crossing the traveling direction of the air.

As shown in fig. 1 (c), the inlet portion 13 is formed in a slightly laterally long oval shape when viewed from the rear side. The outer shape of the inlet portion 13 is formed in substantially the same shape as the inner wall of the air output portion of the blower 11. By inserting the inlet portion 13 of the diffuser 10 into the blower 11, the diffuser 10 is mounted so as not to be rotatable relative to the blower 11.

Here, the diffuser 10 may be formed by molding the blowout surface portion 15 and the main body portion 14 from synthetic resin and fixing them by adhesion or the like. The diffuser 10 is described in a structure in which no other member is present in the internal space of the main body 14, but other structures such as a fan for diffusing air into the internal space, a structure including a cylindrical portion having two or more layers, and the like may be combined.

< constitution of blow-out hole 17 and side hole 18 of protrusion 16 >

Next, the configuration of the blow-out hole 17 of the blow-out surface portion 15 and the side surface hole 18 of the protrusion 16, which are the output portion 12, will be described with reference to fig. 2 and 3.

Fig. 2 (a) is a front view of the diffuser 10, showing the outer surface side of the blowout surface portion 15, and fig. 2 (b) is a view showing the inner surface side of the blowout surface portion 15. In addition, fig. 3 (a) is a sectional view on the Sb-Sb line of fig. 2 (a), and fig. 3 (b) is a sectional view on the Sa-Sa line of fig. 2 (a). In fig. 3 (a) and 3 (b), a part of the diffuser 10 is omitted.

As shown in fig. 2 (a), the blowout holes 17 are provided so as to be spaced apart from each other in the circumferential direction so as to be arranged at substantially constant intervals (pitch) on a concentric circle centered on the reference point P. The blowout holes 17 are also arranged at substantially constant intervals (pitch) in the direction of separation from the reference point P (radial direction). Here, the reference point P is a virtual point set as a point at which the reference axis PL passing through the center or near the center of the inlet 13 and continuing in the traveling direction Y1 in which the air output from the blower 11 travels, and the blowing holes 17 are arranged in the circumferential direction and the radial direction around the reference point P, and the point intersects the blowing face 15.

As shown in fig. 2 (a) and 2 (b), the blowout hole 17 is provided with: a blowout hole 17a formed of a columnar hole having a shape substantially matching that of the inner surface as viewed from the outer surface; and a blowout hole 17b formed by a truncated cone-shaped hole formed smaller on the inner surface side than on the outer surface side. As shown in fig. 3 (a) and 3 (b), the truncated cone-shaped blowout hole 17b is provided at a position close to the reference axis PL passing through the reference point P, and the cylindrical blowout hole 17a is provided at a position further away from the reference axis PL than the truncated cone-shaped blowout hole 17b. Since the small hole portion is opened in the inner space of the main body 14, the air traveling straight from the inlet 13 rarely passes outward through the truncated cone-shaped blowout hole 17b, and accordingly, the pressure of the portion where the truncated cone-shaped blowout hole 17b is provided can be easily increased. This makes it possible to facilitate the air to travel to the side (the direction side of arrow Y2) away from the reference axis PL where the columnar blowout hole 17a is provided.

The air entering the truncated cone-shaped blowout hole 17b is output over a wide range by expanding the inner diameter of the passage as it approaches the outer surface as compared with the cylindrical blowout hole 17a (see the arrow in fig. 3 b). This can reduce the velocity (wind speed) of the air output from the truncated cone-shaped air outlet 17b, and can suppress the wind power of the air output from a position close to the reference axis PL to be low.

The inclination angle (angle of draft taper) of the inner surface of the truncated cone-shaped blowout hole 17b may be set in a range of approximately 5 degrees to approximately 20 degrees, and is preferably set in a range of approximately 10 degrees to approximately 15 degrees, and in this embodiment, approximately 12 degrees is exemplified. The inclination angle of the inner surface of the cylindrical blowout hole 17a is preferably set to be very small, and may be substantially 5 degrees or less, and preferably substantially 3 degrees or less.

The protrusion 16 is disposed so as to be located on virtual annular lines M1 and M2 surrounding the reference point P when viewed from the front side of the visually recognized blowout face 15. Specifically, the 1 st protrusion 16a is disposed on the 1 st circular line M1 having a small circular shape, and the 2 nd protrusion 16b is disposed on the 2 nd circular line M2 having a large circular shape. The 1 st projection 16a and the 2 nd projection 16b are disposed on the respective annular lines M1, M2 at regular intervals in the circumferential direction.

Each of the protrusions 16 is formed in a substantially truncated cone shape having a hemispherical front end portion and a gradually enlarged shaft portion. As shown in fig. 3 (a), the shape of the blowout surface portion 15 provided with the protrusion 16 is formed to be recessed closer to the reference axis PL, and the 2 nd protrusion 16b is disposed at a position protruding more than the 1 st protrusion 16a in accordance with the recess.

The protrusion 16 is formed as follows: the 1 st protrusion 16a disposed on the 1 st annular line M1 and the 2 nd protrusion 16b disposed on the 2 nd annular line M2 have side holes 18 of different shapes and sizes. As shown in fig. 3 (a), the 1 st projection 16a has 2 side holes 18a, and the 2 nd projection 16b has 1 side hole 18b.

Inside the plurality of protrusions 16, there are provided internal passages 19 continuous from the inner surface side of the blowout surface portion 15 to the front side via the inner sides of the respective protrusions 16. As shown in fig. 3 (a) and 3 (b), the internal passage 19 is provided continuously to a side hole 18 formed so as to open to a direction side intersecting the front side (horizontal direction side in fig. 3 (a)). By providing the side surface hole 18, the air of the blower 11 can be outputted toward the side intersecting the traveling direction Y1 of the air outputted from the blow hole 17.

As shown in fig. 2 (a), the side surface hole 18b of the 2 nd protrusion 16b is provided so as to face the center side where the reference point P and the 1 st protrusion 16a are provided. The 2 side holes 18a provided in the 1 st protrusion 16a are provided so as to face the center side where the reference point P and the 1 st protrusion 16a are provided and the outside (the 2 nd protrusion 16b side) which is the opposite side. In the present embodiment, the case where the 1 st projection 16a and the 2 nd projection 16b are oriented in the radial direction around the reference point P is exemplified, but the projection 16 having the side surface 18 opened widely from the radial direction to the front side may be included, the projection 16 having the side surface 18 oriented in the circumferential direction around the reference point P may be included, and the projection 16 oriented in other directions may be included, such as the projection 16 oriented in the oblique direction between the radial direction and the circumferential direction.

As shown in fig. 2 (a), the side hole 18a of the 1 st projection 16a is formed to have a smaller opening width (gap width) than the side hole 18b of the 2 nd projection 16b. The differences in the shape of the side holes 18a, 18b are explained hereinafter with reference to fig. 7.

< positions where blow-out holes 17 having different shapes and sizes are arranged >

Next, a configuration related to the arrangement position of the blowout hole 17 will be described mainly with reference to fig. 4 to 6. Fig. 4 (a) is a view of the blowout face 15 viewed from the outer surface side, and fig. 4 (b) is a view of the blowout face viewed from the inner surface side. Fig. 5 (a) is a partially enlarged view of the blowout surface portion 15 when viewed from the outer surface side, and fig. 5 (b) is a partially enlarged view of the blowout surface portion 15 when viewed from the inner surface side. Fig. 6 is a view of the blowout surface portion 15 as seen from the outer surface side.

As shown in fig. 3 a and 3 b, the blowout surface portion 15 is formed in a disk shape recessed toward the center side of the reference point P (reference axis PL) toward the inlet portion 13 side. The blowout hole 17 is formed so as to have a shape in which a portion having a substantially cylindrical shape or a substantially truncated cone shape in which the same direction as the reference axis PL is the axial direction is removed from the blowout surface portion 15. Therefore, the blowout hole 17 is not precisely a cylindrical or truncated cone hole, but is a shape that is nearly cylindrical or truncated cone because the recess of the blowout surface portion 15 toward the center side is slightly nearly planar, and is therefore called a cylindrical hole or a truncated cone hole.

The blowout hole 17 is configured by setting a region in which the shape and size of the hole are combined with the arrangement position so that the air inputted from the inlet portion 13 is not concentrated on the central portion of the blowout face portion 15. Specifically, the same air outlet 17 or the same kind of air outlet 17 is arranged so that the air outlet surface 15 is located in each of the areas divided into the plurality of areas. The plurality of regions are divided into circular or annular regions with reference to the reference point P, and are divided into a region A1, a region A2, a region A3, and a region A4 in this order from the region near the reference point P, and at least one of the blow-out holes 17 having different shapes or sizes is arranged in each region.

First, in the region A1, a blowout hole 17b having a truncated cone-shaped hole is arranged based on the shape. On the other hand, in the other areas A2, A3, A4 than the area A1, there are provided blow-out holes 17a made of cylindrical holes having a small inclination angle or blow-out holes 17c made of oblong holes having a small inclination angle. The size of the blowout hole 17 is set smaller in the passage size (the hole size on the inner surface side of the blowout hole 17 as the smallest portion in which the cross-sectional area of the hole varies) of the blowout hole 17b arranged in the area A1 to allow air to pass through than in the plurality of blowout holes 17a provided in the area A2 or the area A3. This can suppress the output of a large amount of air from the center portion of the blowout face 15 in the region A1 near the reference point P.

In the case of the size, a plurality of shapes are set as the blowout hole 17 in the area A1. Specifically, as shown in fig. 5 a and 5 b, the passage size of the blowout hole 17 (blowout hole 17 e) provided in a range apart from the reference point P by a predetermined amount or more is set to be large with respect to the blowout hole 17 (blowout hole 17 d) near the center of the reference point P. In this way, in the region A1 near the center, a large amount of air can be suppressed from being output from the portion near the center (reference point P) of the blow-out face 15.

Here, the 2 types of blow-out holes 17d, 17e provided in the area A1 are formed as follows: the size of the outer surface side (the inner diameter of the largest portion) of the blowout surface portion 15 is made uniform, and the size of the inner surface side (the inner diameter of the smallest portion) is made different by making the inclination angle different (see fig. 5 a and 5 b). Therefore, many sites of the same shape can be arranged side by side when viewed from the outer surface side, and the aesthetic appearance of the diffuser 10 can be improved.

In the region near the boundary portion between the region A1 and the region A2, a region in which the blowout hole 17 is not arranged is provided. This region is a portion along the 1 st annular line M1 on the inner peripheral side, and is set as a portion for ensuring strength against breakage when an impact force or a constant load is input by the head portion coming into contact with the 1 st protrusion 16a on the inner peripheral side. By setting the region where the blowout hole 17 is not provided in a ring shape with a certain width on the 1 st annular line M1 where the 1 st protrusion 16a is located, the impact force or the certain load to the 1 st protrusion 16a can be easily dispersed over a wide range of the blowout face 15, and breakage of the blowout face 15 can be prevented.

In the region A2, 2 of the following blow-out holes 17 are provided side by side in the radial direction around the reference point P: the inner diameter is smaller and the passage size is smaller than the blowout hole 17 arranged in the region A3. The inner diameter of the blowout hole 17 provided in the region A2 is set to be small near the center side of the reference point P. The region A2 is a portion near the 1 st protrusion 16a on the inner peripheral side, and by providing the small blowout hole 17 in the region A2, it is possible to prevent the occurrence of a crack starting from the blowout hole 17. Further, since the blowout hole 17 of the area A2 is formed of a columnar hole, air directed toward the front side is not widely dispersed. Therefore, the air can be output to the front side easily by a constant wind force, and the situation where the user feels weak by providing the portion with the small number of the blowout holes 17 between the area A1 and the area A3 can be easily avoided.

In the region A3, the blowout holes 17 are provided at substantially constant intervals in the circumferential direction and the radial direction around the reference point P. In the region A3, the blowout holes 17 having a larger passage size than the regions A1 and A2 are provided, whereby a large amount of air can be outputted forward even at a position distant from the reference axis PL.

In the region A4, a blowout hole 17 composed of not only a cylindrical hole but also an oblong hole is provided. As shown in fig. 3 (a) and 3 (b), a flange portion 21 protruding forward in a circular shape is provided around the blowout surface portion 15, and a2 nd protrusion 16b provided on the outer peripheral side of a position close to the flange portion 21 is provided. Therefore, even if the user's head is in contact with the 2 nd protrusion 16b and inputs an impact force or the like, the force is easily transmitted to the flange portion 21 side, and the possibility of breakage on the blowout face portion 15 side can be reduced. Therefore, even if the blowout hole 17 having a slightly larger passage size is provided in the vicinity of the 2 nd protrusion 16b, the possibility of breakage can be reduced, and the ease of passage of air in a portion farther from the reference point P can be improved, and air can be output to the front side in a nearly uniform state over a wide range of the blowout surface portion 15.

Next, with reference mainly to fig. 4 (b), the setting of the ratio of the area provided with the blowout hole 17 to the cross-sectional area of each region when the inner surface side of the blowout surface portion 15 is divided into a plurality of regions will be described. As shown in fig. 4 (B), a region B1 having a low ratio of the area of the blowout hole 17 into which the air enters is provided in a portion near the reference point P on the inner surface of the blowout surface 15. The other region B2 farther from the reference point P than the region B1 sets the ratio of the area where the blowout hole 17 is provided to be opened higher than the region B1.

Specifically, when viewed in the direction shown in fig. 4 (B) in which the inner surface side of the blowout surface portion 15 is visually recognized from the direction side along the air traveling direction Y1, the ratio of the area provided with the blowout hole 17 to the area of the area B1 is set to 10% or less, and the ratio of the area B2 is set to approximately 25%. In this way, by setting the region B1 in which the ratio of the area of the blowout hole 17 into which the air enters from the internal space surrounded by the main body 14 is small, based on the ratio of the area of the blowout hole 17, it is possible to suppress a large amount of air from being output from the portion of the blowout face 15 near the center (reference point P).

In the case of setting the areas B1 and B2, it is not always necessary to set all of the blow holes 17 to the same shape, and the blow holes 17 having different shapes may be provided in the area B1 or the area B2, or the blow holes 17 may be arranged in concentric circles centered on the reference point P at intervals other than a constant interval. In this case, by adjusting the ratio of the areas where the blowout holes 17 are provided, the air output from the blowout face 15 can be made nearly uniform without being concentrated near the center portion of the reference point P.

Next, with reference mainly to fig. 6, an arrangement interval (hole pitch) at which the blowout holes 17 are arranged so as to be separated in the circumferential direction R around the reference point P will be described. As shown in fig. 6, as the region where the blowout holes 17 are provided, annular regions C1 and C2 where the blowout holes 17 are provided at substantially the same hole pitch in the circumferential direction and the radial direction are provided, and between these regions C1 and C2, a region C3 where the hole pitch in the circumferential direction R is set wide is provided. The area C3 is set to be 5 times or more longer than the size (diameter) of the blowout hole 17, and a portion where air is strongly output can be provided locally on the front side. As shown in fig. 6, the blowout hole 17 of the region C3 is arranged so as to be located between the 2 nd protrusion 16b and the reference point P, and functions to change the traveling direction of the air output from the side hole 18b of the 2 nd protrusion 16b to the front side, so that the concentration of the air in the central portion of the blowout surface portion 15 can be suppressed.

Further, a plurality of blowout holes 17 having a long hole pitch in the circumferential direction are also provided between the 1 st protrusion 16a and the reference point P. Therefore, the traveling direction of the air output from the side surface hole 18 on the direction side of the 1 st protrusion 16a toward the reference point P can be changed to the front side, and the concentration of the air in the center portion of the blowout surface portion 15 can be suppressed.

The region in which the hole pitch of the blowout holes 17 in the circumferential direction is wide is provided so as to be located in the middle portion between the protrusion on the inner circumferential side and the protrusion on the outer circumferential side. If many blow-out holes 17 are provided, the strength of the blow-out face portion 15 is liable to be lowered, wherein in particular, bending moment acting on the blow-out face portion 15 through the protrusion 16 due to the contact of the head of the user with the protrusion 16 is liable to become large at the outer peripheral portion of the blow-out face portion 15 provided with the 2 nd protrusion 16b and the intermediate portion of the 1 st protrusion 16 a. Therefore, by enlarging the hole pitch of the blow-out holes 17, the strength of the intermediate portion can be improved, breakage of the blow-out face 15 can be suppressed, and concentration of air to the central portion of the blow-out face 15 can be suppressed.

< shape of side hole 18 of protrusion 16 >

Next, the shape of the side hole 18 of the protrusion 16 will be described mainly with reference to fig. 7. Fig. 7 is a schematic view for explaining the shape of the protrusion 16, in which fig. 7 (a) shows the outer shape and the cross-sectional shape as viewed from the front end side in parallel with the protrusion 16 without the side hole 18 as the protrusion 16z, in fig. 7 (b) shows the 1 st protrusion 16a, and in fig. 7 (c) shows the 2 nd protrusion 16b.

As the protrusion 16, 2 kinds of 1 st protrusions 16a provided on the inner peripheral side of 2 side holes 18 and 2 nd protrusions 16b provided on the outer peripheral side of 1 side hole 18 are set. The basic shape of each protrusion 16 before cutting the portion constituting the side hole 18 is the same as that of the protrusion 16z, the tip portion is formed in a hemispherical shape, and the shaft portion is formed in a truncated conical shape.

The 1 st protrusion 16a is constituted as follows: the projection has a V-shaped portion cut with respect to the center portion of the projection as viewed from the front side corresponding to the front end side of the projection. The V-shaped opening angle G1 is set to be approximately 45 degrees with respect to the center portion of the protrusion. The side surface hole 18b of the 2 nd protrusion 16b is formed by cutting a V-shaped portion of the opening angle G2 wider than the 1 st protrusion 16 a. The V-shaped opening angle G2 is set to be substantially 90 degrees with respect to the center portion of the protrusion. Further, the case where the bottom portion (corner portion) cut into the V-shape is formed in a circular arc-like continuous manner is exemplified, but may be formed in a shape in which the V-shape bottom portion is tapered.

In this way, although the 1 st protrusion 16a is provided with 2 side holes 18, if compared with the 2 nd protrusion 16b, the 1 st side hole 18 is formed in a shape in which a small-area concave portion is cut out. Therefore, the strength of the shaft portion of the 1 st protrusion 16a can be made close to the 2 nd protrusion 16b provided with 1 side hole 18. In particular, since the side surface hole 18b of the 2 nd protrusion 16b is set to approximately 90 degrees approximately 2 times the size of the cut-out portion of the 1 st protrusion 16a, it is possible to form a plurality of protrusions having a uniform shape and good aesthetic feeling by forming a common basic shape, and at the same time, it is possible to form shaft portions having approximately the same cross-sectional area in all of the protrusions 16, thereby making it difficult to break them.

In addition, although the 1 st protrusion 16a near the inner periphery of the reference point P is provided with 2 side holes 18, the side holes 18 near the reference point P are formed small, so that the internal pressure in the internal space of the main body 14 near the center of the reference point P can be increased. This can enhance the output of air from the 2 nd protrusion 16b located on the outer peripheral side farther from the reference point P.

Here, in the 1 st protrusion 16a and the 2 nd protrusion 16b, as shown in fig. 7 (b) and 7 (c), the hole widths W1 and W2 of the side holes 18 in a cross-sectional view perpendicular to the continuous axial direction of the protrusions are preferably set to 1.5 times or more, and in the present embodiment, to approximately 1.8 times the hole width W1 of the 1 st protrusion 16 a. The hole width W1 of the 1 st protrusion 16a may be substantially 0.5 times or less as compared to the hole width W2 of the 2 nd protrusion 16b, and in this embodiment, is set to substantially 0.38 times. The side surface hole 18 is not necessarily formed so as to cut off the shaft portion in a substantially V shape when viewed from the front side, but may be formed so as to cut off the shaft portion in a U shape or a planar shape when viewed from the front side.

As described above, the diffuser 10 according to the present invention is formed such that the shape and the size of the blowout hole 17 provided in the other region away from the reference point P are different from the blowout hole 17 provided in the region near the 1 st protrusion 16a when viewed from the front side. The side hole 18b of the 1 st protrusion 16a provided in the other region away from the reference point P is formed to have a different shape and size from the side hole 18a of the 1 st protrusion 16a provided in the region close to the 1 st protrusion 16 a. Accordingly, since the ease with which air passes through the region near the reference point P and the region distant from the reference point P can be made different, even if the distance from the reference point P changes, the wind force (or the wind speed) of the air output from the blowout hole 17 of the blowout face 15 and the side surface hole 18 of the protrusion 16 can be made nearly uniform. Accordingly, the air output to the hair or the head can be made to be nearly uniform over a wide range, and drying of the hair, massaging of the head, and the like can be easily performed.

The present invention is not limited to the above-described embodiments of the invention, and can be modified to other embodiments that achieve the same effects as those described above.

In the above embodiment, the case where the virtual annular lines (the 1 st annular line M1 and the 2 nd annular line M2) in which the protrusions 16 are arranged at a constant interval are circular has been described, but the virtual annular lines are not limited to circular, and may be other shapes such as elliptical or oblong. The shape of the 1 st annular line M1 and the 2 nd annular line M2 does not necessarily have to be the same shape, and may be formed of different shapes such as a circular shape for the 1 st annular line M1 and an elliptical shape for the 2 nd annular line M2.

The case where the protrusions 16 are disposed on the 1 virtual annular lines M1 and M2 on the inner peripheral side and the outer peripheral side, respectively, has been described, but the protrusions 16 may be disposed on 2 or more virtual lines having different sizes on the inner peripheral side or the outer peripheral side. The blow-out hole 17 is described as being disposed on a virtual line of a circle centered on the reference point P, but may be disposed on a virtual line of another shape such as an ellipse or an oblong shape at a constant interval as in the case of the protrusion 16.

In the above embodiment, the description has been given of the case where the blow-out hole 17 and the side surface hole 18 of the protrusion 16 each have a plurality of types of shapes, but the blow-out hole 17 and the side surface hole 18 of the protrusion 16 may be set to have a plurality of types of shapes, and in this case, the wind power of the air outputted over a wide range of the blow-out surface 15 can be made nearly uniform.

Industrial applicability

The diffuser of the present invention can be utilized as an accessory part of a hair dryer.

Symbol description

10: diffuser

11: hair drier

12: output unit

13: entrance part

14: main body part

15: blow-out face

16: protrusion body

16a: 1 st protrusion

16b: 2 nd protrusion

17. 17a, 17b, 17c, 17d, 17e: blow-out hole

18. 18a, 18b: side hole

19: an internal passageway.

Claims (5)

1. A diffuser (10) which is attached to an output section for outputting air from a blower (11) and which can diffuse and output air outputted from the blower (11), the diffuser comprising:

an inlet (13) for inputting air output from the blower (11);

a tubular main body (14) that forms an internal space in which the inlet (13) is formed at one end and the inner diameter gradually increases toward the output (12) formed at the other end;

a blowout surface portion (15) formed in a surface shape that blocks the other end side of the main body portion (14), and provided with a plurality of blowout holes (17) along the 1 st direction from the inlet portion (13) toward the output portion (12); and

a plurality of protrusions (16) protruding from the outer surface side of the blowout surface portion (15) toward the 1 st direction side,

in the plurality of protrusions (16),

a side hole (18) formed by opening from the inner surface side of the blow-out surface portion (15) to at least the 2 nd direction side crossing the 1 st direction continuously through an inner passage (19) inside each protrusion (16),

the plurality of protrusions (16) have:

a1 st protrusion (16 a) that is disposed on a virtual 1 st annular line (M1) surrounding a predetermined reference point when viewed from a predetermined front side of the blowout surface portion (15) in the 1 st direction; and

a2 nd protrusion (16 b) disposed on a virtual 2 nd annular line (M2) which is separated from the predetermined reference point to a greater extent than the 1 st annular line (M1) and surrounds the predetermined reference point,

at least one of the blow-out hole (17) or the side hole (18) provided in a2 nd region farther from the predetermined reference point than the 1 st region is formed in a different shape or size from at least one of the blow-out hole (17) or the side hole (18) provided in the 1 st region near the 1 st protrusion (16 a) when viewed from the front side.

2. The diffuser (10) according to claim 1, wherein a plurality of types of blowout holes (17) having different minimum areas through which air can pass are provided as the blowout holes (17), and a plurality of blowout holes (17) having a large minimum area are provided in another area (A3) distant from the predetermined reference point with respect to the blowout holes (17) provided in the predetermined area (A1) close to the predetermined reference point.

3. A diffuser according to claim 1 or 2, wherein as the predetermined region (B1) in which the plurality of blowout holes (17) are provided at positions close to the predetermined reference point, a region is provided in which the ratio of the area of the blowout hole (17) in which the air is provided to enter from the internal space surrounded by the main body portion (14) is smaller than another region (B2) distant from the predetermined reference point.

4. A diffuser according to any one of claims 1 to 3, wherein, as a predetermined region (C3) in which the blowout holes (17) are provided, a region having a wide hole pitch is provided between 2 regions (C1, C2) having a narrow hole pitch in a circumferential direction with respect to the predetermined reference point, as viewed on the predetermined front side.

5. The diffuser according to any one of claims 1 to 4, characterized in that, in the protrusion (16), the protrusion (16) provided with 1 side hole (18) and the protrusion (16) provided with 2 side holes (18) are formed of a shape in which a portion corresponding to the side hole (18) is cut away with respect to substantially the same basic shape, and the side hole (18) of the protrusion (16) provided with 2 side holes (18) is formed in a shape in which a concave portion of a smaller area than the side hole (18) of the protrusion (16) provided with 1 side hole (18) is cut away or a shape in which a concave portion of an acute V-shape is cut away, as viewed from the front side.