JP4475498B2 - Blower - Google Patents

Description

  The present invention relates to a blower represented by a hair dryer.

  For example, in a hair dryer, a plurality of types of series products may be prepared that have the same appearance and specifications, but have different appearances such as colors and patterns. In order to save the manufacturing cost of this kind of series products, simply place the decorative sheet inside the body case made of transparent plastic material, change the decorative sheet with different color and pattern, A hair dryer that can freely change the pattern is known (see Patent Document 1). In this case, the main body case is colored milky white to be translucent so that a deep colored state similar to that of the colored main body case can be exhibited.

JP 2001-61536 A (paragraph number 0022, FIG. 1)

  The decorative sheet is made of a soft polycarbonate sheet punched into a predetermined developed shape, and one side thereof is colored with fluorescent ink, or a pattern is printed on the sheet surface. This type of decorative sheet is wound around and fixed to a structure inside a main body case, for example, a heater cover, and the main body case is fitted on the outer surface of the decorative sheet. Therefore, depending on the structure of the main body case and the peripheral surface structure of the structure around which the decorative sheet is wound, a gap is formed between the decorative sheet and the main body case, and the apparent color in the gap portion is different from other parts. May appear. In particular, when the main body case is colored milky white, the apparent hue (saturation) differs between when the decorative sheet is in close contact with the main body case and when the decorative sheet is separated from the main body case by a gap.

  In hair dryers, the main body case is often tapered in a tapered shape from the inlet to the outlet, but in such cases, the decorative sheet can be developed into a fan shape to create a decorative sheet. Can be adapted to the inner shape of the body case. However, due to the need for external design, if the entire wall surface of the main body case is formed with a three-dimensional flat surface such as a gentle concave surface or convex surface, the inner surface of the case becomes concave or convex as well as the outer surface of the case. Cannot be brought into close contact with the main body case.

  In other words, when the case wall surface is a two-dimensional plane, the decorative sheet can be in close contact with the case wall. However, when the case wall surface becomes a three-dimensional plane, the decorative sheet cannot be in close contact with the case wall, and as a result, the decorative sheet is presented. Unevenness in the color state is inevitable. Therefore, you can choose either to construct the main body case with a simple two-dimensional plane that does not include concave or convex surfaces, or to give up a case design that includes a three-dimensional plane and abandon the product series using decorative sheets. There is a problem in that it must be done.

  The object of the present invention is to realize a series of products using a decorative sheet while enabling a case design including a three-dimensional plane, thus improving the degree of freedom in designing the outer shape design and the case structure. It is providing the air blower which can be manufactured at low cost. The object of the present invention can be made uniform in a uniform state of the colored state of the decorative sheet without being influenced by the difference in the structure of the structure provided inside the main body case or the peripheral surface structure of the main body case. It is providing the air blower provided with the decoration sheet.

In the blower of the present invention, a fan 7 and a motor 8 for driving a fan are provided in a main body case 1 made of a transparent or translucent plastic molded product. The main body case 1 includes a transparent cylindrical air guide case 1A that occupies most of the main body case 1 and a fan case 1B that is attached to the rear end opening of the air guide case 1A. A decorative sheet 70 is disposed on the inner surface of the air guide case 1A. The outer wall surface 72a of the air guide case 1A is formed in a tapered shape in which the outer diameter dimension gradually decreases from the suction port toward the outlet 12. The inner wall surface 72b of the air guide case 1A is formed in a straight line shape in a cross-sectional view, and the inner wall surface 72b is formed in a pre-constricted taper shape in which the inner diameter dimension gradually decreases from the inlet port toward the outlet port 12. Yes. The outer wall surface 72a of the wind guide case 1A is formed in a curved concave shape in cross-sectional view, and the thickness of the wind guide case 1A is thick at the front and rear ends, and a thin portion 74 is formed near the front end. The motor holder 14 that supports the motor 8 is integrally provided with a boss 15 that fits around the motor 8, a cylindrical wall 16 that surrounds the periphery of the fan blade, and a blade piece 17 that connects the two. The front end surface of the presser rib 82 provided with the rear surface of the flange wall 80 on the inner surface of the fan case 1B in a state where the flange wall 80 protruding from the peripheral surface of the cylindrical wall 16 contacts the rear end wall 81 of the air guide case 1A. The motor holder 14 attached to the air guide case 1A is fixedly supported by the fan case 1B so as not to be movable.

Decorative sheet 70 includes a plastic sheet 70a, and a printing layer 70b formed by printing on one surface of the plastic sheet 70a. The printing layer 70b is formed a surface which is a surface opposite to fine uneven surface 70d is formed on the opposite surface of the plastic sheet 70a that faces the inner surface of the main body case 1. And it is made to prevent that the said opposing surface of the plastic sheet 70a closely_contact | adheres to the inner surface of the wind guide case 1A with this micro uneven surface.

In the air blower according to the present invention, in the air guide case 1A in which the outer wall surface 72a is formed in a tapered shape in which the outer diameter dimension gradually decreases from the inlet port toward the outlet port 12 , the inner wall surface 72b is The inner wall surface 72b is formed in a straight tapered shape in a cross-sectional view from the suction port toward the blowout port 12, so that, for example, the main body case is formed from the necessity of the outer shape design. as a whole 1 wall surface had been formed in a gentle concave surface, the decorative sheet 70 can be arranged without problems in the inner surface of the main body case 1. Therefore, according to the blowing device of the present invention, even if the main body case 1 had been designed including a concave surface, it can be realized series of forms of products to choose using a plurality of kinds of decorative sheet 70. That is, it is possible to provide a blower that can manufacture series products at a low cost while improving the degree of freedom in designing the outer shape design and the case structure.

Since the decorative sheet 70 is arranged on the inner surface of the main body case 1, there is no room for creating a gap between the decorative sheet 70 and the main body case 1, and accordingly, the structure of the structure provided inside the main body case 1 is different. Even if the peripheral structure of the main body case 1 changes, the coloration state of the decorative sheet 70 displayed through the main body case 1 is always made uniform and non-uniform so that the series products are configured. it can. Since see through the decorative sheet 70 via the main body case 1, can express a deep shade, while realizing a variety of body case 1, Ru can improve the design of the appearance.

When the inner wall surface 72b of the main body case 1 is formed with a tapered tapered two-dimensional plane from the suction port toward the air outlet 12, the main body case 1 is tapered toward the air outlet 12 from the air inlet. even had been formed on Jo, since the decorative sheet 70 can be disposed along the inner surface of the main body case 1 without problems, Ru can further improve the degree of freedom in designing the outer shape design and case structure of the main body case 12.

The main body case 1 is composed of a transparent cylindrical air guide case 1A that occupies most of the main body case 1 and a fan case 1B that is attached to the rear end opening of the air guide case 1A, and is decorated on the inner surface of the air guide case 1A. According to the blower device in which the sheet 70 is closely arranged, the appearance of the main body case 1 can be further diversified by combining the color and shape of the fan case 1B with the decorative sheet 70 having a different color and pattern. Ru advantageous der in that it can expand the width of the user's choice at the time of purchase.

The outer wall surface 72a of the wind guide case 1A is formed in a curved concave shape in a cross-sectional view, the thickness of the wind guide case 1A is formed thick at the front and rear ends, and the thin portion 74 is formed near the front end . With the flange wall 80 projecting from the peripheral surface in contact with the rear end wall 81 of the air guide case 1A, the rear surface of the flange wall 80 is pressed and fixed by the front end surface of the presser rib 82 provided on the inner surface of the fan case 1B. Thus , according to the main body case 1 in which the motor holder 14 attached to the air guide case 1A is fixedly supported by the fan case 1B so as not to move freely , the thick air guide case 1A and the fan case 1B Since the motor holder 14 can be firmly fixed and held in cooperation, it is possible to reliably prevent the motor holder 14 from vibrating due to the driving reaction force of the motor 8. Further, since the case thickness of the front end portion is increased, the nozzle 2 can be firmly connected to the air guide case 1A without wobbling, and the thin portion 74 is formed near the front end of the main body case 1, so that the entire main body case 1 is formed. as compared with the case of the thick form, Ru mower advantage of lighter of the main body case 1 while ensuring case strength.

  1 to 10 show an embodiment in which the air blower according to the present invention is applied to a hair dryer. In FIG. 2, the hair dryer includes a horizontally long main body case 1, a nozzle 2 that is detachably attached to the front end thereof, and a grip 3 provided on the rear side of the lower surface of the main body case 1.

  On the front surface of the grip 3, there are provided a switch knob 4 that can slide up and down and a push button type switching knob 5. By switching the switch knob 4, the air volume and heater temperature can be controlled and the energization state of the ion generator can be turned on / off. When the switching knob 5 is pushed in, energization to the heater is stopped and the hot air supply state can be switched to the cold air supply state. The grip 3 accommodates the switch knob 4 and the switches 4a and 5a which are switched by the switching knob 5. As indicated by an imaginary line in FIG. 2, the grip 3 is connected to the main body case 1 so as to be foldable about the shaft 6.

  The main body case 1 includes a cylindrical air guide case 1A that occupies most of the main body 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, the main body case 1 contains 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, and an ion generator. It is. 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 is blown out from a circular 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 blower outlet 12 is flattened by the nozzle 2 and blown out together with the ambient air sucked into the nozzle to form a secondary blown air. Reference numeral 13 denotes an outlet grill that covers the outlet 12.

In FIG. 3, the motor 8 is supported by a motor holder 14 fitted in the air guide case 1A. The motor holder 14 is made of a plastic molded product integrally provided with a central boss 15 that is externally fitted to the motor 8, a long cylindrical wall 16 that surrounds the periphery of the fan blade, and six wing pieces 17 that connect the two. Become. The wing piece 17 rectifies the air flow twisted by the fan blade.

As shown in FIG. 9, the motor holder 14 attached to the air guide case 1A is fixed and held by the fan case 1B so as not to move freely. Specifically, with the flange wall 80 protruding from the peripheral surface of the cylindrical wall 16 in contact with the rear end wall 81 of the air guide case 1A, the presser rib 82 provided with the rear surface of the flange wall 80 on the inner surface of the fan case 1B. Press and fix with. The fan case 1B is integrated with the air guide case 1A by engaging the engaging groove 83 provided on the inner surface of the front end thereof with the engaging rib 84 projecting from the peripheral surface of the rear end of the air guide case 1A. Therefore, the motor holder 14 can be firmly fixed and held.

The heater 9 is wound around the heater holder 18 and covered with a cylindrical insulating cover 19 and a heater cover 20 made of a metal plate. As shown in FIG. 4, the heater holder 18 includes a holding cylinder 21 having a circular cross section that is fitted to the motor 8 adjacent to the front end of the motor holder 14 , and a radial engagement along the circumferential surface of the holding cylinder 21. The three insulating plates 22 are configured.

  The holding cylinder 21 is formed of a plastic material excellent in heat insulation and electrical insulation, and loading grooves 21a for inserting the insulating plates 22 are formed at regular intervals at six locations around the cylinder wall. The heater unit H referred to in the present invention is a concept including the heater 9, the heater holder 18, and electric parts such as a thermostat and a fuse that are mounted on the heater holder 18 to control the temperature of the heater 9.

  The insulating plate 22 is formed by forming powder mica into a plate shape, punching it into an H shape, and forming a connecting groove 22a for assembling the insulating plate 22 in a US shape on the central plate surface. By inserting and engaging the three insulating plates 22 into the holding cylinder 21 in order, the peripheral space of the holding cylinder 21 can be equally divided into six. A discharge current adjusting unit 24 and a discharge unit 25, which will be described later, are arranged by using the hollowed portion 22b on the rear side of the insulating plate 22.

  By configuring the heater holder 18 with the holding cylinder 21 and the insulating plate 22, six fan-shaped air passages are defined between the holding cylinder 21 and the insulating cover 19 (see FIG. 8). The air flow to be flow-guided in the respective air passages is stabilized, and the air flow passing through the air passages is stabilized, so that air heating by the heater 9 can be performed evenly.

  Along with the air flow generated by the fan 7, an ion generator is provided to blow negative ions onto the hair. This ion generator is composed of a discharge current adjusting unit 24 and a discharge unit 25 which are disposed adjacent to a hollow portion 22a at the center of the rear part of the heater holder 18. In FIG. 5, a discharge current adjustment unit 24 includes an ion generation circuit composed of a rectification circuit 26, a pulse generation circuit 27, etc., a transformer 28, a diode 29, and the like enclosed in a resin mold as one unit component. It is formed in a cylindrical block shape.

  The discharge unit 25 includes a container-shaped electrode holder 32 having an open rear surface, a needle-shaped discharge electrode 33 assembled to the electrode holder 32, a ring-shaped counter electrode (ground electrode) 34 surrounding the discharge electrode 33, A dielectric cylinder 35 that insulates and cuts off between the electrodes 33 and 34 is formed. Both electrodes 33 and 34 and the transformer 28 are connected by connection leads 36 and 37.

  In FIG. 6, the electrode holder 32 is made of a plastic molded product in which a front tapered taper-shaped cover 40 and an electrode support 41 provided at the center of the cover 40 are integrally formed. The electrode support 41 has a boss protruding inward and outward of the cover 40, the dielectric cylinder 35 and the counter electrode 34 are disposed inside and outside of the boss 42 protruding on the front surface of the cover 40, and a discharge electrode is provided at the center of the boss 42. 33 is arranged. A connection portion between the discharge electrode 33 and the connection lead 37 is sealed with a sealing material 43 having insulating properties. A step 44 is formed on the peripheral surface of the rear opening of the cover 40.

  As shown in FIG. 3, the electrode holder 32 is mounted in a state where the rear portion of the discharge current adjustment unit 24 is fitted into the holding cylinder 21 and the opening surface of the cover 40 is adjacent to the front end of the discharge current adjustment unit 24. The step 44 is received by the engaging projection 45 of the insulating plate 22 (see FIG. 6) by being fitted into the hollow portion 22b from the front, and both the discharge current adjusting unit 24 and the discharge unit 25 are attached to the insulating plate 22. On the other hand, it is fixed inseparable. That is, the units 24 and 25 are fixed to the heater holder 18 by an engagement structure including the step portion 44 and the engagement protrusion 45.

  In the assembled state, the electrode holder 32 is within the outline of the discharge current adjusting unit 24 as shown in FIG. 8, and both the electrodes 33 and 34 and the dielectric cylinder 35 are opposed to the blowing grill 13 (FIG. 6). reference). Further, the outer surfaces of the connection leads 36 and 37 are covered with a cover 40. Therefore, the connection leads 36 and 37 do not come into contact with the air flow to generate wind noise. Further, the radiant heat of the heater 9 can be blocked by the cover 40 to prevent the connection leads 36 and 37 from being heated. The dust carried by the airflow does not enter and accumulate in the cover 40. Both the discharge current adjusting unit 24 and the discharge unit 25 are assembled in a state where they are bonded and fixed in advance with a heat-resistant adhesive tape. In this case, the periphery of the bonded portion is sealed with the adhesive tape. It can prevent more reliably that 37 is heated. In addition, dust that enters between the discharge current adjusting unit 24 and the discharge unit 25 can be further prevented.

  The air flow that flows along the peripheral surfaces of the holding cylinder 21 and the discharge current adjusting unit 24 blows away negative ions floating around the discharge portion while flowing along the peripheral surface of the cover 40, Ion retention can be prevented. Usually, when negative ions stay in the ambient air of the electrode holder 32, the potential difference between the ambient air and the discharge electrode 33 is reduced, so that the generation of the negative ions is suppressed. Since the air flow is actively guided to the discharge electrode 33 side by the cover 40 having a constricted taper shape (a frustoconical cylinder shape), the retention of negative ions can be eliminated, so that negative ions can be generated effectively. By discharging electrons from the discharge electrode 33 toward the counter electrode 34, oxygen in the air can be negatively charged and negatively ionized, and negative ions in which minute moisture is bound to the negatively charged oxygen It can penetrate deeply. In other words, moisture can be penetrated into the hair to increase the moisture content, so that the hair is moisturized while drying the hair. The size of negative ions is about 0.003 μm.

An intake ring 46 for suppressing noise from the fan 7 is incorporated in the suction grill 11. The intake ring 46 integrally includes a ring-shaped tube base 47 that is engaged with the fan case 1B and a bell mouth structure air guide tube 48 that projects from the rear end of the tube base 47 in a constricted shape. A group of intake ports 49 are opened along the peripheral surface of the air guide tube 48 on the tube base 47 side. By engaging engagement claws 50 provided at several locations on the inner surface of the cylinder base portion 47 with the circumferential step portion 30 of the fan case 1B from the rear side, the intake ring 46 can be integrated with the fan case 1B. Thereafter, the entire suction ring 46 can be covered with the suction grill 11 by welding the cylindrical peripheral wall 11a of the suction grill 11 to the fan case 1B. In this assembled state, the front opening of the air guide tube 48 is located in the rear opening of the tube wall 16 of the motor holder 14 , and an intake gap E is formed in a donut shape between the air guide tube 48 and the tube wall 16. Secured.

  Most of the air sucked in by the fan 7 is guided and accelerated by the inner wall of the air guide tube 48 having a bell mouth structure, and is sent to the front of the case while being twisted by the fan blade. Usually, in the vicinity of the tip of the fan blade, a vortex that reverses in the direction opposite to the air flow is generated. The vortex flow is caused by the fact that the front peripheral portion of the intake gap E becomes negative pressure due to the accelerating air flow guided by the inner wall of the air guide tube 48, and the air flows backward from the tip of the fan blade. In the embodiment, apart from the previous air flow (main flow path), a sub-flow path is formed between the intake port 49 and the intake gap E, and the air sucked from the intake port 49 passes through the sub-flow path. Therefore, it is possible to flow into the front peripheral portion of the intake gap E, so that the generation of a vortex between the fan blade tip portion and the intake gap E can be effectively suppressed. As a result, fan noise caused by eddy currents can be suppressed.

  Since the entire intake ring 46 is covered with the suction grill 11 and the intake port 49 is opened in the inner space of the suction grill 11, it is possible to well prevent the hair from being sucked into the intake gap E. Of course, the invasion of hair is also prevented in the main flow path formed on the inner wall of the air guide tube 48. Since the air intake port 49 is opened in the air guide tube 48 close to the air intake gap E, the air sucked from the air intake port 49 can flow without resistance along the outer wall of the air guide tube 48, and the intake efficiency correspondingly. Is good. Since the air flow in the auxiliary flow path that flows through the outer wall of the air guide tube 48 and the intake gap E is generated by the venturi action of the accelerated air flow that flows through the main flow path, the flow velocity of the air flow in the auxiliary flow path is the air flow in the main flow path. Slightly slower than the flow velocity.

  When negative ions come into contact with the surface of the blowing grill 13 and are negatively charged, the charged negative charges and negative ions repel each other, and the amount of negative ions released decreases. In order to eliminate the ion saturation accompanying the charging of the negative charge, the negative charge charged to the blow grill 13 is grounded through the user's body so that the amount of negative ions supplied can be increased.

  Specifically, as shown in FIG. 2, a grounding piece 51 having conductivity is provided on the outer surface of the grip 3, and the blowing grill 13 and the grounding piece 51 are conducted through a conductive path 52, and the blowing grille 13 is charged negatively. The electric charge is grounded to the human body through the ground piece 51. It should be noted that negative charges charged on the human body can be released through the floor, walls, and the like. The blow-out grill 13 is made of a press-molded product obtained by punching a metal plate material, and a ring-shaped ion emission port 53 is provided at the center thereof. The ion emission port 53 is made of a plastic molded product and also serves as a protective frame for the discharge electrode 33.

  The ground piece 51 is made of a leaf-shaped plastic molded product that is long in the vertical direction, and the entire surface thereof is coated with a plating layer in order to impart conductivity. As shown in FIG. 6, the ground piece 51 and the blowout grill 13 are electrically connected via a heater cover 20 that contacts the blowout grill 13 and a lead wire 54 (see FIG. 3) that connects the heater cover 20 and the ground piece 51. Connect to. That is, the previous conductive path 52 is constituted by the heater cover 20 and the lead wire 54. In this way, when the blower grill 13 is connected to the ground piece 51 using the heater cover 20, there is no need to wire the lead wire 54 in the air guide case 1A, and the winding length can be shortened. It is possible to save the trouble of assembling the apparatus.

  In FIG. 2, the nozzle 2 is composed of a connecting cylinder 57 that is fitted into the air outlet 12 and a nozzle main body 58 that is externally fixed to the connecting cylinder 57. The nozzle body 58 is formed in a tapered shape from the inlet side to the outlet side of the nozzle 2, and the front cross section thereof has a vertically long oval shape. An air introduction port 60 for taking in ambient air is opened on the peripheral surfaces near the outlets of the upper and lower curved walls. Due to the opening of the air introduction port 60, fresh outside air with a large amount of water flows into the air flow heated and dried by the heater 9 passing through the nozzle body 58, and thus the air is excessively dried when the hair is dried. Can be prevented. The connecting cylinder 57 is provided with an inner cylinder 59 having a long elliptical cross section at the front and rear, and its rear end opening faces the ion emission port 53 of the blowing grill 13. Further, the inner cylinder 59 is substantially concentric with the nozzle body 58. The air flow generated by the fan 7 passes through the air guide case 1 </ b> A, then flows into the nozzle body 58 and the inner cylinder 59 and blows out from the opening (blowout portion) at the tip of the nozzle 2.

  In order to prevent negative ions from adhering to at least the ion passages through which negative ions pass (the inner wall of the inner cylinder 59 and the entire surface of the ion discharge port 53), a water repellent coat is applied. The water repellent coat is formed, for example, by coating a fluorine resin typified by Teflon (registered trademark) or by coating with a silicon paint. By applying the water repellent coating to the ion passage, the minute water adhering to the ion passage can be easily blown off by the air flow generated by the fan 7, so that negative ions do not adhere to the minute moisture. That is, the negative ions that are blown out together with the air flow from the blow-out portion are less likely to adhere to the inner wall of the passage while passing through the ion passage, and the amount of negative ions can be prevented from decreasing accordingly. Even after the minute moisture is blown off, the negative ions containing the minute moisture hardly adhere to the wall surface of the ion passage due to the influence of the water repellent coating, and the effect is continuous.

  The above water-repellent structure is not limited to being applied to a hair dryer with an ion generator built-in as in this embodiment, but a fan or tube with a built-in ion generator and a blower fan in a cylindrical body case. It can also be applied to an ion generator in which an ion generator and a blower fan are built in the main body case. In the ion generator, the blower fan may be omitted if it is a type that generates ion wind. In short, it is effective if the ion passage is water-repellent. In this case, the ion passage becomes the main body case 1 itself, and by applying a water-repellent coating to the entire inner wall of the main body case 1 through which negative ions pass, it is possible to suppress a decrease in the amount of negative ions blown from the main body case 1. When the inner cylinder 59 is provided as described above, an air flow containing a lot of negative ions can be flow-guided by the inner cylinder 59, and the outside thereof can be wrapped with a donut-shaped air flow, so The amount of negative ions reaching the hair can be increased by preventing the negative ions from diffusing in the next blowing wind. Negative ions can also be expected to refresh the mind and body.

In order to save the manufacturing cost of series products with different visual impressions such as colors and patterns, the main body case 1 is formed of a transparent plastic material, and the decorative sheet 70 is disposed in close contact with the inner surface thereof. Specifically, as shown in FIG. 1, the air guide case 1A that covers most of the heater cover 20 and the cylindrical wall 16 is formed of a transparent plastic material, and the decorative sheet 70 disposed on the inner surface is changed. By doing so, the apparent color and pattern of the main body case 1 can be freely changed.

  The decorative sheet 70 is made of a transparent plastic sheet 70a excellent in heat resistance, for example, a soft polycarbonate sheet, printed on one side using colored ink, and a protective layer 70c is coated on the outer surface of the printed layer 70b. As shown in FIG. 10 (a), it is formed by generally punching in a fan shape. Notches 75 for avoiding contact interference with the fan case 1B are formed at both ends in the circumferential direction of the decorative sheet 70, respectively. Several types of decorative sheets 70 with different colors are prepared, and these decorative sheets 70 are rolled up into a cylindrical shape as shown in FIG. 10 (b) and loaded on the inner surface of the air guide case 1A and bonded and fixed. Thus, it is possible to obtain the wind guide case 1A having different coloration states.

  When the decorative sheet 70 is mounted on the inner surface of the main body case 1 and the mirror-like surface of the decorative sheet 70 is in close contact with the inner surface of the main body case 1, a pattern that is wet with water is locally generated. There is a risk of uneven coloring. In order to prevent the occurrence of such a water pattern, as shown in FIG. 10B, the surface of the plastic sheet 70a on the opposite side of the printed layer 70b is formed with a satin-like micro uneven surface 70d, and the plastic This prevents the surface of the sheet 70 a from being in close contact with the inner surface of the main body case 1. The print layer 70b can be formed by applying a single color or a plurality of colors on the entire surface of the sheet, and can be formed by printing a picture or a pattern alone or on a ground color.

  The air guide case 1 </ b> A integrally includes a wind guide tube 72 formed in a conical shape from the inlet side toward the air outlet 12, and a connecting arm 73 projecting from the rear surface of the bottom surface of the wind guide tube 72. I have. As shown in FIG. 1, the outer wall surface 72a of the air guide tube 72 is formed by a curved concave three-dimensional plane, whereas the inner wall surface 72b of the air guide tube 72 has a tapered tapered shape. Form with a dimensional plane.

  In this way, by forming the inner and outer wall surfaces 72a and 72b of the air guide tube 72 by two types of planes, the thin portion 74 is formed in the front and rear midway portions while increasing the thickness of the air guide tube 72 at the front and rear ends. can do. In this embodiment, the thin portion 74 is positioned closer to the front end than the front and rear center of the air guide case 1A so that the thickness at the rear end side of the case is the thickest and the thickness at the front end of the case is thicker than the thin portion 74. .

  Increasing the thickness on the rear end side of the case allows the motor holder 14 to be firmly fixed and held in cooperation with the air guide case 1A and the fan case 1B, so that the motor holder 14 vibrates due to the driving reaction force of the motor 8. It can be surely prevented. Further, since the case thickness of the front end portion is increased, the nozzle 2 can be connected to the air guide case 1A without wobbling. In addition, although the cross-sectional shape in the arbitrary cross-sections of the air guide tube 72 is circular, it can be formed in an elliptical shape only on the outer wall surface 72a.

  The assembly of the main body case 1 and the structure housed therein is performed as follows. First, the decorative sheet 70 is rolled into the air guide case 1A from the back of the case. At this time, since the decorative sheet 70 tries to return to the developed shape by its own elasticity, it can be brought into close contact with the inner surface of the main body case 1 without adjusting the shape, but the minute uneven surface 70d contacts the inner surface of the case, so Generation of patterns can be prevented. Next, an operation unit in which the ion generator, the heater unit H, the motor 8 and the motor holder 14 incorporating the fan 7 are electrically connected to each other is inserted into the air guide case 1A from the rear of the case, as shown in FIG. In this way, the flange wall 80 of the motor holder 14 is brought into contact with the rear end wall 81 of the air guide case 1A. In this state, the fan case 1B is press-fitted to the air guide case 1A, so that the engaging rib 84 is lowered and engaged with the engaging groove 83 so as to integrate both 1A and 1B. The rib 82 is pressed and fixed. The flange wall 80 also serves to receive the rear end of the decorative sheet 70 and restrict the decorative sheet 70 from moving back and forth.

According to the hair dryer configured as described above, even if the outer wall surface 72a of the air guide case 1A is formed as a curved concave three-dimensional plane, the decorative sheet 70 is in close contact with the inner surface of the air guide tube 72 without hindrance. Since it can arrange | position, the decoration sheet 70 incorporated in the wind guide case 1A can be changed and the series goods from which a color and a pattern differ can be manufactured at low cost, implement | achieving the case design of the main body case 1 including a three-dimensional plane. Since the decorative sheet 70 is incorporated in close contact with the inner wall surface 72b of the two-dimensional plane of the wind guide case 1A, there is no room for a gap between the decorative sheet 70 and the wind guide case 1A, and the coloring is always uniform. The state can be demonstrated. Even when the heater cover 20 and the peripheral surface of the cylinder wall 16 of the motor holder 14 are not flush with each other, a uniform color state can be obtained regardless of these structures.

  Other than the above embodiment, the main body case 1 does not have to have a two-piece structure of the air guide case 1A and the fan case 1B. The one-piece structure in which the air guide case 1A also serves as the fan case 1B, or the air guide case 1A. Further, a multi-piece structure may be used. The outer wall surface 72a of the air guide case 1A can be formed of a curved convex three-dimensional plane or a three-dimensional plane including a curved convex surface. The air guide case 1A may be formed to be translucent by coloring the entire case milky white or roughening the outer surface of the case. The decorative sheet 70 can be formed of cloth cloth, leather, metal sheet, or the like other than the plastic sheet. The blower is not limited to a hair dryer, and includes a hand dryer, a fan, an ion generator, and the like.

It is an exploded sectional view showing the relational structure of a wind guide case, a decoration sheet, and a heater unit. It is a vertical side view of a hair dryer. It is a vertical side view of a main body case. It is a disassembled perspective view of a heater holder. It is explanatory drawing which shows schematic structure of an ion generator. It is a vertical side view which shows the discharge unit of an ion generator. It is a disassembled perspective view of a discharge unit. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the detailed structure of an intake ring. FIG. 10A is a development view of the decorative sheet, and FIG. 10B is a perspective view of the decorative sheet rolled into a mounted state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 1A Air guide case 1B Fan case 7 Fan 8 Motor 12 Air outlet 70 Decoration sheet 72a Outer wall surface 72b of main body case Inner wall surface 74 of main body case Thin wall part

Claims (2)

A blower in which a fan (7) and a motor (8) for driving a fan are provided in a body case (1) made of a transparent or translucent plastic molded article,
The main body case (1) is composed of a transparent cylindrical air guide case (1A) that occupies most of the main body case (1) , and a fan case (1B) attached to the rear end opening of the air guide case (1A).
A decorative sheet (70) is arranged on the inner surface of the wind guide case (1A),
The outer wall surface (72a) of the wind guide case (1A) is formed in a tapered shape in which the outer diameter dimension gradually decreases from the suction port toward the blowout port (12).
The inner wall surface (72b) of the wind guide case (1A) is formed in a straight line shape in a cross-sectional view, and the inner wall surface (72b) is before the inner diameter dimension gradually decreases from the suction port toward the air outlet (12). It is formed in a tapered shape,
The outer wall surface (72a) of the wind guide case (1A) is formed in a curved concave shape in a cross-sectional view, and the wall thickness of the wind guide case (1A) is thick at the front and rear ends, and the thin portion (74) near the front end. Is formed,
The motor holder (14) that supports the motor (8) includes a boss (15) that fits around the motor (8), a cylindrical wall (16) that surrounds the fan blade, and a blade piece (17) that connects the two. With
With the flange wall (80) protruding from the peripheral surface of the cylindrical wall (16) contacting the rear end wall (81) of the air guide case (1A), the rear surface of the flange wall (80) is placed on the fan case (1B). ), The motor holder (14) attached to the air guide case (1A) is fixedly supported by the fan case (1B) so that it cannot move freely. A blower characterized by that. Decorative sheet (70) comprises a plastic sheet (70a), said plastic sheet (70a) of the strip surface to the printing form print layer and (70b),
A micro uneven surface (70d) is formed on the facing surface of the plastic sheet (70a) facing the inner surface of the main body case (1), which is the surface opposite to the surface on which the printed layer (70b) is formed , The air blower according to claim 1, wherein the minute uneven surface prevents the facing surface of the plastic sheet (70a) from coming into close contact with the inner surface of the air guide case (1A).

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