JP2004357763A - Hair dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply hot air with well adjusted temperature and humidity by regulating an inflow rate of outside air and to separately operate a hair dryer by gripping a nozzle even right after continuously using it in a hot air mode. <P>SOLUTION: An outlet 12 of a body case 1 is provided with a nozzle 2 converging an air flow. The nozzle 2 is provided with a pair of left/right convergence walls 45 inclined into a tapered state from an entrance side toward an exit side and a curved wall 46 smoothly connecting the upper/lower parts of the both convergence walls 45. The curved wall 46 comprises a front curved wall 46a smoothly connecting the front upper/lower parts of the both convergence walls 45 and a rear curved wall 46b smoothly connecting the rest upper/lower parts of the both convergence walls 45. The interval between the upper/lower parts of the front curved wall 46a is set larger than the upper/lower interval of the rear curved wall 46b so as to form a step part between both the curved walls 46a and 46b. An air inlet 47 is provided in the step part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hair dryer having a nozzle for converging airflow and having an air inlet for taking in surrounding air into a peripheral wall of the nozzle.
[0002]
[Prior art]
2. Description of the Related Art In a hair dryer, a nozzle is known which uses an airflow blown out of a main body case to take in ambient air into the interior (see Patent Document 1). Here, the nozzle is constituted by a nozzle body attached to the main body case and an outlet tube fixed to the front end of the nozzle body. The front end of the nozzle body is formed in a vertically elongated flat cylindrical shape with a pair of left and right throttle walls and a curved wall that connects the upper and lower sides of both throttle walls smoothly, and is fitted to the left and right throttle walls and the throttle wall. An air inlet is formed between the outlet cylinder and the outlet cylinder. The nozzle is press-fitted to the main body case.
[0003]
[Patent Document 1]
Registered Utility Model No. 3014299 (Paragraph No. 0017, FIG. 1)
[0004]
[Problems to be solved by the invention]
In Patent Literature 1, since the air introduction ports are opened on the left and right throttle walls, the surroundings of the flattened hot air can be wrapped with external air to supply hot air whose temperature and humidity are adjusted. However, since the air inlet is provided at the left and right positions of the throttle wall that narrows the air flow flat, that is, at the point where the flow velocity is high and the pressure is the lowest compared to other parts, the inflow of external air is large, and the secondary There is a tendency that the ratio of the outside air contained in the blowing wind is too large. The large opening area of the air inlet also contributes to an increase in the proportion of external air.
[0005]
When the hair dryer is used continuously in the hot air mode, the nozzle is heated and becomes hot, but the throttle wall can be cooled with room temperature air introduced into the nozzle, so hold the throttle wall by hand even immediately after use. Can be separated from the main body case. However, when removing the nozzle from the main body case, it is easy to grasp and apply force, so the upper and lower curved walls are often gripped and separated to operate. become. This is because the curved wall is hardly cooled by the air introduced into the nozzle, is thicker than the throttle wall, has a large heat storage amount, and is hardly cooled.
[0006]
An object of the present invention is to regulate the inflow of external air to supply hot air whose temperature and humidity are appropriately adjusted, and to perform a separation operation by squeezing the nozzle immediately after the hair dryer is continuously used in the hot air mode. There is a hair dryer available.
[0007]
[Means for Solving the Problems]
In the hair dryer of the present invention, the nozzle 2 that converges the air flow is provided at the outlet 12 of the main body case 1. The nozzle 2 includes a pair of left and right converging walls 45 that incline in a tapered shape from the inlet side to the outlet side, and a curved wall 46 that connects the upper and lower sides of both converging walls 45 smoothly. An air inlet 47 is opened on the peripheral surface of the wall 46 near the outlet so as to communicate the inner and outer surfaces of the nozzle 2 (claim 1).
[0008]
The curved wall 46 is composed of a front curved wall 46a that smoothly connects the front and lower portions of the two converging walls 45 and a rear curved wall 46b that smoothly connects the remaining upper and lower portions of the both converging walls 45. The vertical interval of the front curved wall 46a is set to be larger than the vertical interval of the rear curved wall 46b, and a step portion is formed between the front curved wall 46a and the rear curved wall 46b. The air inlet 47 is open (Claim 2).
[0009]
A guide recess 48 that is recessed from the surrounding wall is formed on a wall surface extending from the entrance side of the rear curved wall 46b to the air inlet 47. A projection 50 for cooling promotion is formed in the guide recess 48 (claim 3). The projection may be a rib 50 that is long in the front and rear directions substantially parallel to the air flow inside the nozzle (claim 4).
[0010]
The rib 50 can be formed so as to be inclined upward from the inner bottom wall of the guide recess 48 toward the front curved wall 46a. The rib 50 connects the rear edge of the front curved wall 46a and the front edge of the rear curved wall 46b at the left and right center of the air inlet 47, thereby integrating the curved walls 46a and 46b. ).
[0011]
The nozzle 2 is composed of a connecting cylinder 35 on the inlet side and a transparent or translucent nozzle main body 36 fitted and fixed to the connecting cylinder 35 externally. A decorative sheet T1 is interposed between the connecting cylinder 35 and the nozzle main body 36. (Claim 7).
[0012]
Effects of the Invention
In the hair dryer according to the present invention, the nozzle 2 includes a pair of left and right converging walls 45 inclined in a tapered shape toward the outlet side, and a curved wall 46 that connects the upper and lower sides of both converging walls 45 smoothly. Since the air inlet 47 is open on the peripheral surface of the curved wall 46 near the outlet, the air blow-out is converged in a non-circular shape while the primary air blown out from the air outlet 12 is converged into a non-circular shape, similarly to the conventional nozzle. The amount of air flowing from the port 47 can be suppressed. This is because the flow velocity of the air on the inner surface of the curved wall 46 is slower than the flow velocity of the air on the inner surface of the converging wall 45, and the pressure drop is correspondingly smaller. Therefore, according to the present invention, it is possible to supply hot air whose temperature and humidity are appropriately adjusted by regulating the amount of external air flowing into the nozzle.
[0013]
As shown in FIG. 9, when the nozzle 2 is removed from the main body case 1 by squeezing the upper and lower curved walls 46, the curved wall 46 around the air inlet 47 is cooled by room temperature air flowing into the nozzle 2. Therefore, even immediately after the hair dryer is continuously used in the hot air mode, the nozzle 2 can be securely gripped and tightened to easily perform the separating operation (claim 1).
[0014]
The curved wall 46 is formed by the front curved wall 46a and the rear curved wall 46b, and the vertical interval of the front curved wall 46a is set to be larger than the vertical interval of the rear curved wall 46b, so that the front and rear curved walls 46a and 46b can be arranged. According to the nozzle 2 in which a step portion is formed and the air inlet 47 is opened in the step portion, the rear curved wall 46b does not need to be formed in a tapered shape, and the air inlet 47 is formed in the rear curved wall 46b. Since it can be formed on the outer surface of the front end, the negative pressure acting on the air inlet 47 can be reduced, and the inflow of external air can be moderately suppressed accordingly. There is also an advantage that molding of the nozzle 2 is facilitated. When grasping the upper and lower curved walls 46, the fingertip can be hooked on the front curved wall 46a as shown in FIG. 9, so that the nozzle 2 can be easily removed (claim 2).
[0015]
According to the nozzle 2 in which the guide recess 48 is formed from the inlet side of the rear curved wall 46b to the air inlet 47 and the protrusion 50 is formed in the guide recess 48, the protrusion 50 is formed by the normal temperature airflow flowing toward the air inlet 47. Can be cooled, so that the cooling of the guide concave portion 48 can be promoted and the temperature can be kept low. Therefore, when the upper and lower curved walls 46 are squeezed to remove the nozzle 2, there is no need to think hot (claim 3).
[0016]
When the protrusion 50 is formed of a long rib in the front and rear directions substantially parallel to the air flow inside the nozzle, the flow direction of the external air flowing toward the air inlet 47 is regulated by the rib 50, Therefore, the external air can be mixed without disturbing the flow of the primary blown air throttled by the nozzle 2. There is also an advantage that the direction of the outlet can be easily changed around the central axis of the main body case 1 by rotating the nozzle 2 with the fingertip applied to the rib 50 (claim 4).
[0017]
If the rib 50 is formed so as to be inclined upward from the inner bottom wall of the guide concave portion 48 toward the front curved wall 46a, the temperature is lower than that of the rib 50 when the upper and lower curved walls 46 are gripped and the nozzle 2 is removed. The fingertip can be prevented from touching the inner bottom wall of the high guide recess 48 as much as possible, and the rib 2 and the front curved wall 46a bite into the fingertip, so that the nozzle 2 can be more easily removed (claim 5).
[0018]
When the rear edge of the front curved wall 46a and the front edge of the rear curved wall 46b are connected by a rib 50 at the left and right center of the air inlet 47, and the curved walls 46a and 46b are integrated, the air inlet 47 is faced. The structural strength of the curved walls 46a and 46b is improved, and damage due to a drop impact or the like can be well prevented.
[0019]
When the nozzle 2 is composed of the connecting cylinder 35 and the transparent or translucent nozzle main body 36 fitted and fixed to the connecting cylinder 35, the heat insulating effect on the inlet-side cylindrical wall of the nozzle 2 is improved. Can be maintained at a lower temperature state. By interposing the decorative sheet T1 between the connecting cylinder 35 and the nozzle main body 36, the decorative sheet T1 can be visually recognized through the transparent or translucent nozzle main body 36, so that the nozzle 2 is used as a design element to improve the appearance of the hair dryer. Can be improved (claim 7).
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 9 show an embodiment of a hair dryer according to the present invention. In FIG. 2, the hair dryer includes a horizontally long cylindrical main body case 1, a nozzle 2 removably attached to a front end thereof, and a grip 3 provided on a lower surface rear side of the main body case 1.
[0021]
A switch knob 4 that can slide up and down is provided on the front surface of the grip 3. By switching the switch knob 4, it is possible to control the air volume and the heater temperature and to turn on / off the power supply to the ion generator. A switch or the like operated by the switch knob 4 is housed inside the grip 3. As shown by the imaginary line in FIG. 2, the grip 3 is foldably connected to the main body case 1 around the shaft 5.
[0022]
The main body case 1 is composed of a cylindrical air guide case 1A that occupies most of the main case 1, and a fan case 1B that is press-fitted to the rear end opening of the air guide case 1A. 2 and 3, an axial flow fan 7, a motor 8 for driving the fan, a heater 9 for heating the air flow generated by the fan 7, an ion generator, and the like are housed inside the main body case 1. I have. The air flow generated by the fan 7 is introduced from a suction grill 11 provided at the rear end of the main body case 1 and blows out from an outlet 12 having a circular cross section opened at the front end of the main body case 1. The primary blown air blown out from the outlet 12 is converged flat by the nozzle 2 and blows out together with the surrounding air sucked into the nozzle to form a secondary blown air. Reference numeral 13 denotes an outlet grill.
[0023]
In FIG. 3, the motor 8 is supported by a motor holder 15, and the motor holder 15 is fitted inside the wind guide case 1A and fixed by the fan case 1B. The motor holder 15 is provided radially with six blade pieces 16 for rectifying the air flow twisted by the fan 7.
[0024]
The heater 9 is wound and mounted around a heater holder 18, and its outer surface is covered with a cylindrical insulating cover 19 and a heater cover 20 made of a metal plate. The heater holder 18 includes a cylindrical body 21 fitted to the motor 8 adjacent to the front end of the motor holder 15, and six insulating plates 22 radially engaged and mounted along the peripheral surface of the cylindrical body 21. It consists of. The cylindrical body 21 is formed of a plastic material having excellent heat insulating properties and electric insulating properties. The insulating plate 21 is formed by pressing powdered mica into a plate shape and then punching it into a predetermined shape.
[0025]
When the heater holder 18 is composed of the cylindrical body 21 and the insulating plate 22, a cylindrical air passage S is defined between the cylindrical body 21 and the insulating cover 19, and most of the heater 16 is formed in the cylindrical body. 21 can be faced. That is, the air flow sent from the fan 7 is flow-guided by the insulating cover 19, the cylindrical body 21 and the insulating plate 21 to stabilize the air flow passing through the air passage S, so that the air heating by the heater 16 is evenly performed. I can do it. In order to increase the front-rear length of the air passage S as much as possible and stabilize the airflow, the front-rear length of the tubular body 21 is set to be slightly more than 60% of the front-rear length of the air guide case 1A, and the front end of the insulating plate 22 is formed. It faces the vicinity of the outlet grill 13.
[0026]
An ion generator for blowing negative ions to the hair together with the air flow generated by the fan 7 is provided. The ion generator includes an electrode unit 25 supported by an electrode holder 24 disposed on the inner surface of the blowout grill 13 and a resin mold 30 disposed inside the cylindrical body 21. In the resin mold 22, an ion generating circuit including a rectifying circuit, a pulse generating circuit, and the like, a transformer, and the like are enclosed as one unit component. In FIG. 1, an electrode unit 25 insulates and blocks a plastic holder 26, a center electrode 27 fixed to the holder 26, a ring-shaped peripheral electrode (ground electrode) 28, and a space between the electrodes 27. And a dielectric cylinder 29 or the like.
[0027]
According to the above-described ion generator, oxygen in the air can be negatively charged to be negatively ionized, and moisture combined with the negatively ionized oxygen can be permeated into hair to increase the moisture content. That is, the hair can be moisturized while drying the hair.
[0028]
When negative ions come into contact with the surfaces of the blowout grill 13 and the electrode holder 24 and become negatively charged, the charged negative charges and the negative ions repel each other, so that the amount of the negative ions emitted from the hair dryer decreases.
[0029]
In order to eliminate such negative charge, as shown in FIG. 2, a grounding piece 31 having conductivity is provided on the outer surface of the grip 3, and the blowing grill 13 and the grounding piece 31 are electrically connected via a conductive path. The negative charge charged to the blowout grill 13 and the electrode holder 24 can be grounded via the earth piece 31 and the human body. In addition, the negative charge charged on the human body can be released via a floor or a wall.
[0030]
The ground piece 31 is made of a leaf-shaped plastic molded product having a long tree shape in the vertical direction, and the entire surface thereof is coated with a plating layer to impart conductivity. The ground piece 31 is fixed to a decorative cover 32 which is detachably engaged with the grip 3. The ground piece 31 and the outlet grill 13 are electrically connected to each other through a heater cover 20 that contacts the outlet grill 13 and a lead wire 33 (see FIG. 3) that connects the heater cover 20 and the ground strip 31. As described above, when the outlet grill 13 is connected to the grounding piece 31 using the heater cover 18, it is not necessary to wire the lead wire 33 in the air guide case 1A, and the length of the lead wire 33 can be shortened. The trouble of assembling the dryer can be saved.
[0031]
4 to 8, the nozzle 2 is interposed between a connection cylinder 35 fitted and mounted on the outlet 12, a nozzle body 36 externally fitted and fixed to the connection cylinder 35, and a fitting surface between the two 35. And a decorative sheet T1. The connecting cylinder 35 and the nozzle body 36 are each formed of a transparent or translucent plastic material. The connecting cylinder 35 integrally includes an outer cylinder 37 having a circular section with a short front-rear length, an inner cylinder 38 having an elliptical cross-section with a long front and rear, and four radiation ribs 39 connecting the two 37.
[0032]
On the inner surface of the inner cylinder 38, the decorative sheet T2 and the holding cylinder 41 are assembled inseparably. Above and below the rear end peripheral surface of the outer cylinder 37, arc-shaped rib-shaped projections 43 that engage with the locking step portions 42 provided on the air outlet 12 are formed. The inside of the nozzle 2 is divided into inner and outer portions, and an inner cylinder 38 is provided to wrap around negative ions generated by the ion generator with an air flow.
[0033]
The nozzle body 36 has a pair of left and right converging walls 45 that are inclined in a tapered shape from the inlet side to the outlet side of the nozzle 2, and a curved wall 46 that connects the upper and lower sides of both converging walls 45 smoothly. An air inlet 47 for taking in surrounding air is opened on the peripheral surface of the curved wall 46 near the outlet.
[0034]
The curved wall 46 is composed of a front curved wall 46a that smoothly connects the front and lower portions of the two converging walls 45 and a rear curved wall 46b that smoothly connects the remaining upper and lower portions of the both converging walls 45. The vertical distance between the front curved walls 46a is set to be larger than the vertical distance between the rear curved walls 46b, so that a step is formed between the front and rear curved walls 46a and 46b, and the air inlet 47 is opened at the step. are doing. As shown in FIG. 5, the front curved wall 46a is formed in a vertically long elliptical shape, and the rear curved wall 46b is formed in a circular shape at the rear end and is formed in a vertically long elliptical shape at the front end. It is formed so as to smoothly change from a circle to an ellipse.
[0035]
As described above, when the primary blowing wind converges in a vertically elliptical shape at the nozzle 2, the flow velocity of the air flow near the outlet increases, and the pressure decreases accordingly. Therefore, the air near the air inlet 47 flows into the nozzle from the air inlet 47 and blows out from the outlet together with the primary blown air. In order to make the inflow of the external air smooth, the wall surface from the inlet side of the rear curved wall 46b to the air inlet 47 is recessed from the surrounding wall to form the guide recess 48.
[0036]
In FIG. 1, the guide concave portion 48 is formed so as to be gently downwardly inclined toward the air introduction port 47, and a rib (projection) 50 is formed at the left and right center thereof.
[0037]
As shown in FIG. 4, the rib 50 extends from the rear end of the guide recess 48 to the front curved wall 46a so as to be parallel to the flow of air inside the nozzle. The rib 50 seen from the side surface is inclined upward from the inner bottom wall of the guide recess 48 toward the front curved wall 46a. The front portion of the rib 50 connects the rear edge of the front curved wall 46a and the front edge of the rear curved wall 46b to integrate the two curved walls 46a and 46b, thereby helping to increase the structural strength.
[0038]
When removing the nozzle 2 from the main body case 1, as shown in FIG. 9, the upper and lower curved walls 46 are squeezed up and down with the thumb and forefinger, and the nozzle 2 is pulled in the direction away from the air guide case 1A (the direction of arrow P). If any of the upper and lower sides are depressed, the engagement between the locking step portion 42 and the projection 43 is released, and the nozzle 2 can be separated from the outlet 12. At this time, since the curved wall 46 around the air inlet 47 is cooled by the normal temperature air flowing into the nozzle 2, even immediately after using the hair dryer continuously in the hot air mode, the nozzle 2 is firmly gripped and tightened. It can be easily separated.
[0039]
When the nozzle 2 is mounted on the outlet 12, the entire nozzle 2 is moved in the direction opposite to the arrow P toward the main body case 1 with the rear end side wall of the connecting cylinder 35 applied to the outlet 12. By the pushing operation, the projection 43 gets over the locking step 42 and engages with the snap. In this mounting state, since the locking step portion 42 is formed in a circular shape, the nozzle 2 can be freely rotated around the central axis of the main body case 1 and can hold an arbitrary rotational position.
[0040]
When the nozzle 2 is constituted by the connecting cylinder 35 and the nozzle main body 36, and the decorative sheet T1 is interposed between the two 35 and 36, the structure of the nozzle 2 near the outlet 12 is made into a three-layer structure, and the heat insulating effect is obtained. Since the height can be further increased, the user does not feel hot when removing the nozzle 2.
[0041]
In addition to the above embodiment, the nozzle body 36 and the connecting cylinder 35 can be formed integrally. In the case of a hair dryer without an ion generator, the inner tube 38 of the connecting tube 35 can be omitted. The projection 50 for promoting cooling provided in the guide recess 48 can be formed by a rib orthogonal to the flow of air inside the nozzle as shown in FIG. Further, as shown in FIG. 10B, the projections 50 are formed by a plurality of projection groups, and the front curved wall 46a and the guide recess 48 can be integrated by the front and rear short ribs 50a.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view showing a structure of a nozzle and a peripheral portion thereof.
FIG. 2 is a side view of the hair dryer.
FIG. 3 is a vertical sectional side view of a main body case.
FIG. 4 is an exploded perspective view of a nozzle.
FIG. 5 is a front view of a nozzle.
FIG. 6 is a partially cutaway side view of the nozzle.
FIG. 7 is a sectional view taken along line AA in FIG.
FIG. 8 is a sectional view taken along line BB in FIG. 6;
FIG. 9 is a side view showing the procedure for separating the nozzles.
FIG. 10 is a plan view of a nozzle showing a modified example of a projection.
[Explanation of symbols]
1 Body Case 2 Nozzle 12 Outlet 35 Connecting Tube 36 Nozzle Body 45 Converging Wall 46 Curved Wall 46a Front Curved Wall 46b Back Curved Wall 47 Air Inlet 48 Guide Recess 50 Rib T1 Decorative Sheet

Claims (7)

A hair dryer provided with a nozzle 2 for converging an air flow at an outlet 12 of a main body case 1;
The nozzle 2 includes a pair of left and right convergence walls 45 that incline in a tapered shape from the inlet side to the outlet side, and a curved wall 46 that connects the upper and lower sides of both convergence walls 45 smoothly.
A hair dryer in which an air inlet 47 is opened on a peripheral surface of the curved wall 46 near the outlet so as to communicate the inner and outer surfaces of the nozzle 2. The curved wall 46 is composed of a front curved wall 46a for smoothly connecting the upper and lower portions of the front portions of the two converging walls 45, and a rear curved wall 46b for smoothly connecting the remaining upper and lower portions of the both converging walls 45,
The vertical interval of the front curved wall 46a is set to be larger than the vertical interval of the rear curved wall 46b, and a step portion is formed between the front curved wall 46a and the rear curved wall 46b,
The hair dryer according to claim 1, wherein an air inlet (47) is opened at the step. A guide recess 48 recessed from the surrounding wall is formed on a wall surface from the entrance side of the rear curved wall 46b to the air introduction port 47,
The hair dryer according to claim 2, wherein a projection (50) for promoting cooling is formed in the guide recess (48). 4. The hair dryer according to claim 3, wherein the protrusion is a longitudinally extending rib 50 substantially parallel to an air flow inside the nozzle. The hair dryer according to claim 4, wherein the rib (50) is formed to be inclined upward from the inner bottom wall of the guide recess (48) toward the front curved wall (46a). The rib (50) according to claim 4 or 5, wherein the rib (50) connects the rear edge of the front curved wall (46a) and the front edge of the rear curved wall (46b) at the left and right center of the air inlet (47) to integrate the curved walls (46a, 46b). Hair dryer. The nozzle 2 includes a connection cylinder 35 on the inlet side, and a transparent or translucent nozzle body 36 that is externally fitted and fixed to the connection cylinder 35,
The hair dryer according to claim 1, wherein a decorative sheet (T1) is interposed between the connecting cylinder (35) and the nozzle body (36).

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