JP2006141490A - Hair dryer - Google Patents

Abstract

To provide a hair dryer capable of reliably preventing inhalation of hair while allowing outside air to be mixed into dry air heated by a heater.
A main body case 1 houses a fan 9, a motor 10, a heater unit 11, and the like. The main body case 1 is configured in a double cylinder shape by an inner case 1A and an outer case 1B that is externally fitted to the inner case 1A. An outside air introduction passage 25 is formed between both cases 1A and 1B. The outside air introduction passage 25 includes an inner groove 26 formed on the peripheral surface of the inner case 1 </ b> A and an outer groove 27 that is bulged and covers the outer surface of the inner groove 26. An outlet 32 of the outside air introduction passage 25 opens around the outlet 7. The inlet 31 of the outside air introduction passage 25 is sufficiently separated from the suction port 6 by a predetermined distance L between the central portion in the front-rear direction of the main body case 1 and the suction port 6, that is, sufficiently away from the blowout port 7. Moreover, it is provided at a position where the suction port 6 is not affected by the suction air.
[Selection] Figure 2

Description

  The present invention relates to a hair dryer in which outside air can be introduced by a venturi action utilizing dry air, and more particularly, to a hair dryer in which an outside air intake is provided around a main body case that also serves as a wind tunnel tube.

  As this type of hair dryer, there is a type in which an outside air intake port is opened in the vicinity of the blowout grill (Patent Documents 1 and 2). There, a plurality of outside air intakes are opened in the cylindrical wall of the main body case facing the blow grill, and outside air is introduced by the venturi action of dry air. As described above, when the outside air intake port is opened near the blow grill, the hair can be dried while the outside air having a high relative humidity is mixed with the drying air heated by the heater and the hair is moderately humidified. .

Japanese Utility Model Publication No. 51-110789 (2nd page, Fig. 2) Japanese Utility Model Publication No. 63-83104 (2nd page, Fig. 1 (c))

  According to the hair dryer having the outside air intake in the vicinity of the blowout grill, the outside air can be blown onto the hair together with the dry air. However, since the outside air intake port exists in the vicinity of the blowout grill, a part of the hair is sucked into the main body case from the outside air intake port when the hair is dried, and the hair tip may be heated to damage the hair. When the outside air intake is blocked with hair, or when the hair is dried by grasping the main body case, the outside air intake may be blocked with a fingertip or a palm and the outside air may not be sufficiently introduced.

  In order to eliminate the above problems, it is possible to prevent the hair from being sucked in by providing the outside air intake at a position sufficiently away from the blowout grill, but it is actually difficult. In order to mix the outside air into the dry air heated by the heater, it is necessary to provide an outside air intake on the peripheral wall of the case between the heater unit and the blow grill, but in many cases the blow grill near the end of the heater unit Therefore, the outside air intake cannot be provided at a position sufficiently away from the blowout grill. For example, although it is easy to provide an outside air intake on the outer surface of the middle part of the heater unit, in that case, the sucked outside air is heated and the relative humidity is lowered, so that moisture cannot be replenished.

  An object of the present invention is to provide an easy-to-use hair dryer that can reliably prevent the inhalation of hair while allowing outside air to be mixed into the dry air heated by a heater. An object of the present invention is to improve the structural strength of the main body case and provide a hair dryer that is sturdy and not easily broken.

  The hair dryer of the present invention includes a cylindrical main body case 1 having a suction port 6 opened at one end and a blowout port 7 opened at the other end, and a fan 9 and a fan drive are provided therein. Motor 10 and heater unit 11 are arranged. An outside air introduction passage 25 is provided on the outer surface of the main body case 1 to introduce outside air by the venturi action of the dry air generated by the fan 9. An outlet 32 of the outside air introduction passage 25 opens around the outlet 7. As shown in FIG. 2, the inlet 31 of the outside air introduction passage 25 opens at a position at least a predetermined distance L forward from the suction port 6 between the front-rear direction center portion of the main body case 1 and the suction port 6. ing. Between the outside air introduction passage 25 and the suction port 6, suction interference prevention means for preventing suction interference between the two is provided.

  Specifically, the suction interference prevention means is a wind blown out from the main body case 1.

  The wind is configured to blow out from the vicinity of the inlet 31 in the outside air introduction passage 25.

  The suction interference preventing means is a rib 52 that is long in a direction intersecting with the front-rear direction of the main body case 1.

  The main body case 1 is formed in a double cylinder shape by an inner case 1A and an outer case 1B that is externally fitted to the inner case 1A, and an outside air introduction passage 25 is formed between the inner case 1A and the outer case 1B. can do.

  On the peripheral surface of the inner case 1A formed in a tapered shape toward the blowout port 7, an inner groove 26 in which the depth of the recess increases toward the outlet 32 is formed. From the inlet 31 to the vicinity of the outlet 32, An outer groove 27 covering the outer surface of the inner groove 26 is formed to bulge in the outer case 1B, and the cross-sectional area of the outside air introduction passage 25 from the inlet 31 to the outlet 32 can be set to be substantially the same.

  A transparent outer case 1B can be externally fitted to the inner case 1A, and a decorative sheet 37 can be interposed on the fitting surface between the inner case 1A and the outer case 1B. A plurality of ribs 30 for receiving the inner surface of the outer groove 27 are formed at the inlet 31 of the outside air introduction passage 25. The plurality of ribs 30 can each be formed of a plate wall that is long in the front-rear direction, and can be arranged in multiple upper and lower stages.

  In the hair dryer of the present invention, the outside air introduction passage 25 is provided on the outer surface of the main body case 1 that accommodates the fan 9, the motor 10, the heater unit 11, and the outlet 32 is open around the outlet 7. The outside air continuously introduced from the outside air introduction passage 25 can be sent and supplied together with the drying air by the venturi action of the drying air generated by the fan 9. Since the outside air introduced at this time has a higher relative humidity than that of the overheated drying air, the hair can be dried and hair-styled while applying appropriate moisture to the hair.

  Further, the inlet 31 of the outside air introduction passage 25 opens at a position at least a predetermined distance L forward from the suction port 6 between the front-rear direction center portion of the main body case 1 and the suction port 6. Is provided at a position sufficiently away from the air outlet 7, for example, it is possible to prevent well that a part of the hair covers the outer surface of the main body case 1 and closes the inlet 31 when the hair is dried. Even when the hair dryer is used while holding the peripheral surface of the main body case 1 with one hand, the entrance 31 can be prevented from being blocked by the palm or fingertip.

  Since the outside air introduction passage 25 is formed on the outer surface of the main body case 1 as a separate section from the passage of the dry air, the inside of the outside air introduction passage 25 can always be maintained at a low temperature. Therefore, even if a part of long hair is sucked into the outside air introduction passage 25, the hair can be reliably prevented from being heated and damaged.

  By providing a suction interference prevention means between the outside air introduction passage 25 and the suction port 6 to prevent suction interference between the two, the flow of air sucked from the inlet 31 by the flow of air sucked from the suction port 6 is increased. Since it is not obstructed, the suction efficiency of the air sucked from the inlet 31 is improved. Alternatively, the flow of air sucked from the suction port 6 does not reverse the air in the outside air introduction passage 25 and the venturi action (suction action) near the outlet 32 of the outside air introduction passage 25 is not hindered. In this case, the efficiency of inhaling air attracted by the venturi action is improved. As a result, the inlet 31 of the outside air introduction passage 25 can be brought closer to the suction port 6 side, and the design is not restricted. If the inlet 31 of the outside air introduction passage 25 is brought closer to the suction port 6 without providing the suction interference prevention means, the suction force of the air sucked from the suction port 6 is larger. In the worst case, the air flows backward from the front of the main body case 1 to the rear in the outside air introduction passage 25 and the venturi action (suction action) near the outlet 32 of the outside air introduction passage 25 occurs. Will never happen.

  Since the suction interference prevention means uses the air blown out from the main body case 1, it is possible to prevent the venturi action (suction action) near the outlet 32 of the outside air introduction passage 25 from being lowered without significantly destroying the design. When the position of the blowing air is set between the inlet 31 and the suction port 6, it is possible to prevent the suction interference between the both due to the flow of the inlet 31 and the flow of the suction port 6. The wind blown from the main body case 1 becomes an air curtain, thereby preventing the flow of the suction port 6 from obstructing the flow of air sucked from the inlet 31. However, if the opening 53 formed in the main body case 1 is made too large, the momentum of the air blown from the opening 53 is increased, and the air sucked from the inlet 31 is adversely affected. Therefore, the opening 53 is appropriately sized so as not to have an adverse effect. Set. In order to form an air curtain, the openings 53 are formed side by side in a direction intersecting with the front-rear direction of the main body case 1 as shown in FIG. To do. The wind blown out uses the wind generated by the fan 9.

  Further, since the opening 53 is formed so as to blow the air from the vicinity of the inlet 31 in the outside air introduction passage 25, the wind generated by the fan 9 can be forcibly sent to the vicinity of the inlet 31, so the inlet 31 is sucked. Even if it is brought close to the mouth 6, the reverse flow of the wind does not occur, that is, the venturi action (suction action) near the outlet 32 of the outside air introduction passage 25 is not inhibited. By assisting the venturi action, even if the inlet 31 is brought closer to the suction port 6, the amount of air blown from the outlet 32 of the outside air introduction passage 25 is not reduced. At this time, if the opening 53 is made too large, the wind blown out from the opening 53 may flow backward and the wind may blow out from the inlet 31. Even if the inlet 31 becomes the outlet in this way, the venturi action near the outlet 32 is caused. Anything that can be maintained is included in the technical idea of the present invention. Moreover, it is preferable that the opening 53 is a through hole facing forward. That is, since the momentum blown out from the opening can be used, the auxiliary effect of the venturi action is further enhanced.

  Since the suction interference preventing means is the rib 52 that is long in the direction intersecting the front-rear direction of the main body case 1, the space between the inlet 31 and the inlet 6 is partitioned, and the air around the inlet 31 is separated. Can be prevented from being rubbed from the suction port 6, and a reduction in suction force from the inlet 31 can be prevented as much as possible. That is, the suction interference between the two due to the flow of the inlet 31 and the flow of the suction port 6 can be prevented.

  When the main case 1 is constituted by the inner case 1A and the outer case 1B fitted and fitted to the inner case 1A, and the outside air introduction passage 25 is formed between the two cases 1A and 1B, a double cylindrical main case Since 1 can exhibit a higher degree of heat insulation, there is an advantage that the safety during use can be improved or the heat load of the hair dryer can be improved. Since the ambient wall of the passage and its peripheral wall can be maintained at a low temperature by ambient air passing through the outside air introduction passage 25 formed between the cases 1A and 1B, the hair dryer can be used while holding the peripheral surface of the main body case 1. Even when used, the user does not feel hot. According to the double cylindrical main body case 1, the structural strength is improved, and a hair dryer that is tough and hard to break can be provided.

  An outside air introduction passage 25 is formed by an inner groove 26 formed in a recess on the peripheral surface of the inner case 1A, and an outer groove 27 formed in the outer case 1B so as to cover the outer surface of the inner groove 26. The depth is increased toward the outlet 32, and the outer groove 27 is formed to bulge from the inlet 31 to the vicinity of the outlet 32 so that the cross-sectional area of the outside air introduction passage 25 from the inlet 31 to the outlet 32 is set to be substantially the same. According to the above-described passage structure, the flow resistance of the outside air inside the outside air introduction passage 25 can be reduced, so that the outside air can be introduced more effectively even though the outside air is introduced only by the venturi action of the dry air. In addition, since the bulging range of the outer groove 27 is limited to the vicinity of the outlet 32 from the inlet 31, the front cross section of the outer case 1B can be formed in a circle, thereby the blowout that is an accessory of the hair dryer. The nozzle 34 can be easily externally fitted to the front end of the outer case 1B, and the blowing nozzle 34 can be rotated as it is attached to easily change the direction of convergence of the drying air.

  According to the hair dryer in which the decorative sheet 37 is interposed on the fitting surface between the inner case 1A and the transparent outer case 1B, the decorative sheet 37 can be seen through the transparent outer case 1B. Compared to the case where 1B is formed of a colored plastic molded product or the case where the decorative sheet 37 is arranged on the outer surface of the case, a deep colored state is obtained, and the design effect by the decorative sheet 37 is improved. improves. If several decorative sheets 37 having different colors and patterns are prepared, there is an advantage that a plurality of types of hair dryers having different design impressions can be easily made into a series.

  According to the passage structure in which a plurality of ribs 30 are provided at the inlet 31 of the outside air introduction passage 25 and the inner surface of the outer groove 27 is received by these ribs 30, the impact when the outer groove 27 collides with another object is as follows: Since the inner case 1A can also be burdened via the rib 30, it is possible to reliably prevent the outer groove 27 bulged and formed in the outer case 1B, particularly the peripheral wall portion of the inlet 31 from being damaged. Since the opening of the inlet 31 is divided into a plurality of portions by the plurality of ribs 30, there is also an advantage that the ribs 30 can restrict foreign substances from entering the outside air introduction passage 25.

  According to the passage structure in which the plurality of ribs 30 are each formed of a plate wall that is long in the front-rear direction and is arranged in the upper and lower stages, the flow direction of the outside air sucked into the outside air introduction passage 25 is set along the wall surface of the rib 30. Since the air can be rectified, the flow of the outside air in the outside air introduction passage 25 can be smoothed, and the effect of attracting the outside air by the venturi action of the dry air can be enhanced.

First Embodiment FIGS. 1 to 6 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 with front and rear ends opened, and a grip 2 provided on the back side of the lower surface thereof.

  On the front and rear surfaces of the grip 2 are provided switch knobs 3 and 4 that are slidable up and down. By switching the front switch knob 3, the air volume and temperature of the drying air can be controlled, and the switch knob 4 on the rear side. Can be switched on / off. The grip 2 is connected to the main body case 1 through a shaft 5 and can be folded along the main body case 1 around the shaft 5 as indicated by an imaginary line in FIG.

  In FIG. 3, the main body case 1 is formed in a double cylinder shape by an inner case 1A that also serves as a wind tunnel for dry air and an outer case 1B that is externally fitted to the inner case 1A, and a suction port 6 is formed at the rear end thereof. It opens and the blower outlet 7 is opening in the front end. The blowout nozzle 34, which is an accessory of the hair dryer, is detachably fitted to the front end of the outer case 1B. When the outlet side of the wind of the blow nozzle 34 is mounted as shown in FIG. 2, the outlet nozzle 34 is configured to be gradually throttled from the left-right direction, that is, the outlet nozzle 34 has an elliptical shape that is long in the vertical direction. It has become.

  The inner case 1A is formed of a tapered cylindrical body that is tapered toward the outlet 7 side, and a connecting frame 28 for the grip 2 is integrally formed at the rear surface of the lower surface of the cylindrical body. The outer case 1B is formed of a tapered cylindrical body made of a transparent plastic material, which is formed in a tapered shape toward the outlet 7 as in the case of the inner case 1A.

  In FIG. 4, the main body case 1 has an axial flow type fan 9, a motor 10 that drives the fan 9, a heater unit 11, and an ion generator 12, from the suction port 6 toward the blowout port 7. And are arranged. Reference numeral 13 denotes a motor holder, in which a motor 10 and a transformer unit 12b of the ion generator 12 are accommodated in a cylindrical case provided at the center thereof.

  The suction port 6 is covered with a suction grill 16 formed of punching metal, and the blowout port 7 is covered with a press-molded blowout grill 17. The electrode unit 12a of the ion generator 12 is mounted in the center of the electrode holder 18 assembled to the inner surface of the blowout grill 17. The heater unit 11 includes six insulating frames 21 arranged and fixed around the motor holder 13, a heater wire 22 wound around the periphery of the motor frame 13, and a cylindrical cover 23 covering the outer surface of the heater wire 22. It is.

  In order to mix the dry air heated by the heater unit 11 with external air having a relative humidity higher than that of the dry air, two external air introduction passages 25 are provided on the left and right sides of the outer surface of the main body case 1. Specifically, as shown in FIG. 3 and FIG. 4, the inner groove 26 is formed on the left and right sides of the inner case 1 </ b> A, and the outer groove 27 covering the outer surface of the inner groove 26 is bulged and formed on the outer case 1 </ b> B. An outside air introduction passage 25 is formed by both the grooves 26 and 27.

  The inner groove 26 has a groove bottom wall having a partially arc-shaped cross section, and is formed from the rear end side of the inner case 1A to the front end of the case. The vertical width of the inner groove 26 is set to be large on the rear side of the groove and smaller as it approaches the front end of the groove. Similarly, the recess depth of the inner groove 26 is shallow on the rear side of the groove, and is formed deeper as it approaches the front end of the groove. Near the rear end of the inner groove 26, five ribs 30 are integrally formed in an upper and lower multi-stage shape. Each rib 30 is formed of a horizontal plate wall that is long in the front-rear direction and protrudes in parallel.

  The front and rear length of the outer case 1B is shorter than the front and rear length of the inner case 1A. Therefore, in a state where the outer case 1B is externally fitted to the inner case 1A, the inclined rear end of the outer groove 27 intersects the rear end of the rib 30 and constitutes the inlet 31 of the outer air introduction passage 25. By receiving the inner surface of the inlet 31 with the rib 30, it is possible to effectively prevent the outer groove 27 from being damaged due to a drop impact or the like by restricting the outer groove 27 from being bent inward by the rib 30. The ribs 30 prevent foreign matters from entering the outside air introduction passage 25 and exert an effect of rectifying the outside air entering the outside air introduction passage 25.

  As shown in FIG. 4 or 5, an opening 53 is formed in the inner case 1 </ b> A in the vicinity of the inlet 31 in the outside air introduction passage 25 so as to penetrate inside and outside. As shown in FIGS. 2 and 5, the openings 53 are formed between the ribs 30 side by side in a direction intersecting the front-rear direction of the main body case 1. Accordingly, a part of the wind generated by the fan 9 used for drying can be blown out from the opening 53 to the vicinity of the inlet 31 of the outside air introduction passage 25 (see arrow A). A plurality of the openings 53 may be formed as one slit that is long in a direction intersecting with the front-rear direction of the main body case 1 without forming a plurality.

  If the inlet 31 of the outside air introduction passage 25 is brought closer to the suction port 6 without providing the suction interference prevention means, the suction force of the air sucked from the suction port 6 is larger. In the worst case, the air flows backward from the front of the main body case 1 to the rear in the outside air introduction passage 25 and the venturi action (suction action) near the outlet 32 of the outside air introduction passage 25 occurs. May not occur at all. Therefore, as in the present embodiment, the opening 53 is formed so as to blow the air from the vicinity of the inlet 31 in the outside air introduction passage 25, so that the wind generated by the fan 9 and not passing through the heater unit 11 is generated. Since a large amount of wind can be forcibly sent to the vicinity of the inlet 31, even if the inlet 31 is brought close to the suction port 6, no reverse flow of the wind occurs, that is, a venturi near the outlet 32 of the outside air introduction passage 25. The action (suction action) is not inhibited. As the venturi action assists in this way, even if the inlet 31 is brought closer to the suction port 6, the amount of air blown from the outlet 32 of the outside air introduction passage 25 is not reduced, and the design of the hair dryer is expanded. You can have it. At this time, if each of the openings 53 is made too large, there is a possibility that the wind blown out from the openings 53 will flow backward and blow out from the inlet 31. Any device that can maintain the action is included in the technical idea of the present invention. In the present embodiment, as shown in FIG. 4, the opening 53 is a through-hole directed forward. Thereby, since the momentum of the wind blown from the opening 53 can be used, the auxiliary effect of the venturi action is further enhanced. In this case, air is sucked from the inlet 31.

  In particular, in the state where the blowing nozzle 34 is mounted on the blowing port 7 of the main body case 1, the blowing nozzle 34 itself becomes a resistance of the wind blown from the blowing port 7, and the venturi action (suction action) tends to decrease. In this embodiment, such a problem can be solved.

  As described above, the air blown from the vicinity of the inlet (31) in the outside air introduction passage (25) between the outside air introduction passage (25) and the suction port (6) is suction interference prevention means for preventing suction interference.

  The vertical width of the outer groove 27 is the largest in the vicinity of the inlet 31, is set to the same width as the previous inner groove 26, and converges in a parabolic shape at a position away from the front end of the outer case 1B. Similarly, the bulging dimension of the outer groove 27 is the largest in the vicinity of the inlet 31 and is zero at a position away from the front end of the outer case 1B by a certain distance, and is melted into the other cylindrical wall.

  In FIG. 2, the inlet 31 of the outside air introduction passage 25 opens at a position at least a predetermined distance L forward from the suction port 6 between the front-rear direction center portion (a dimension position) of the main body case 1 and the suction port 6. To do. The predetermined distance L means a distance at which the outside air that tries to enter the outside air introduction passage 25 is not attracted by the flow of air sucked from the suction port 6 by the fan 9.

  As described above, by restricting the bulging range of the outer groove 27 to the rear from the front end of the outer case 1B, the front cylindrical wall of the outer case 1B can be circular in cross section. 34 (see FIG. 2) can be easily fitted on the front end of the outer case 1B. The convergence direction of the drying air can be changed by rotating the blowing nozzle 34 in the mounted state.

  As shown in FIGS. 4 and 6, the outlet 32 of the outside air introduction passage 25 is opened on the left and right sides of the outer peripheral surface of the blow-out grill 17, and the periphery of the outlet 32 is an outer portion slightly protruding from the front end of the inner case 1 </ b> A. It is surrounded by the cylindrical wall of case 1B.

  An outside air introduction passage 25 is formed between the inner case 1A and the outer case 1B, the recess depth of the inner groove 26 is gradually increased toward the outlet 32, and the bulging dimension of the outer groove 27 is increased toward the side closer to the inlet 31. In this case, the cross-sectional area of the outside air introduction passage 25 from the inlet 31 to the outlet 32 can be substantially equalized, so that the flow of outside air in the outside air introduction passage 25 can be smoothed.

  When the inner grooves 26 are formed on the left and right sides of the inner case 1 </ b> A, the inner surfaces of the groove walls protrude into the arrangement space of the heater wires 22. However, as shown in FIG. 5, the heater wire 22 is positioned closer to the center of the case than the other portion at the portion corresponding to the groove wall inner surface, so that the heater wire 22 does not interfere with the groove wall inner surface.

  The main body case 1 is composed of an inner case 1A and an outer case 1B, and the inner case and the outer case 1B are configured in a double-sided manner. By utilizing this, a decorative sheet 37 is arranged between the cases 1A and 1B to improve the decorativeness of the appearance. Yes. The decorative sheet 37 is formed of a colored sheet made of a soft resin cut into a trapezoidal shape, and is interposed on a fitting surface between the inner case 1A and the outer case 1B excluding the outside air introduction passage 25.

  As described above, since the outer case 1B is formed of a transparent plastic material, a deep colored state can be obtained by looking at the decorative sheet 37 through the outer case 1B. By preparing the decorative sheet 37 having different colors and patterns as required, a plurality of types of hair dryers having different design impressions can be commercialized in series.

  When the decorative sheet 37 is formed of a soft resin sheet, the fitting gap between the inner case 1A and the outer case 1B can be closed by the decorative sheet 37, so that the flow of outside air in the outside air introduction passage 25 is ordered. Thus, the outside air can be effectively mixed with the dry air.

  In the use state, the dry air generated by the fan 9 is heated by the heater unit 11 to be warmed and blown out from the outlet 7 while being squeezed by the inner case 1A. At this time, the air near the outlet 32 of the outside air introduction passage 25 is attracted by the venturi action of the dry air. When the air in the vicinity of the outlet 32 is attracted by the dry air, the pressure in the outside air introduction passage 25 decreases, so that outside air flows from the inlet 31. As described above, the outside air is supplied in a state of being mixed in the dry air by the venturi action using the dry air, and replenishes the hair with moisture. When the ion generator 12 is operated at the same time to release negative ions from the electrode unit 12a, since the outside air containing a lot of moisture is introduced from the outside air introduction passage 25, the negative ions are attached to the moisture and the hair is attached. The hair can be trimmed while giving moderate moisture.

  When performing hair drying or hair styling, the hair may be blown off by a dry wind and may be covered with the outer surface of the main body case 1. Even in such a case, if the inlet 31 is located at the rear of the case close to the inlet 6 sufficiently away from the outlet 7, the hair can be well prevented from being sucked into the outside air introduction passage 25 from the inlet 31 by the hair. The entrance 31 is not blocked. Even if the hair tips are sucked into the outside air introduction passage 25, they are only exposed to the low temperature outside air passing through the passage, so that the hair is not altered by heat. It is possible to reliably prevent the hot air that has been blown from the outlet 7 and then reversed upon hitting the head from being sucked from the inlet 31.

  Hair drying may be performed by grasping the peripheral surface of the main body case 1 with one hand, but since the main body case 1 is composed of an inner case 1A and an outer case 1B, the inner case 1A and the outer case 1B are insulated. The effect can be exerted to reliably prevent the heat of the heater wire 22 from being transmitted to the outer case 1B, and the peripheral surface of the main body case 1 can be well prevented from becoming hot. In particular, since the bulging walls of the inner groove 26 and the outer groove 27 are cooled by the outside air passing through the outside air introduction passage 25, the inner groove 26 and the outer groove 27 are used by grasping the outer surface of the left and right outer grooves 27 and holding the peripheral surface of the main body case 1. Then, even when the hair dryer is continuously operated for a long time, there is an advantage that the bulging wall can function as a non-slip when the fingertip is put on the outer surface of the outer groove 27 without feeling heat.

Second Embodiment FIGS. 7 to 9 show another embodiment of the hair dryer according to the present invention. In this embodiment, unlike the first embodiment, the rib 52 is used as a suction interference prevention means.

  That is, without forming the opening 53 in the main body case 1, a long rib 52 is formed between the inlet 31 and the suction port 6 in a direction intersecting the front-rear direction of the main body case 1. As a result, the space between the inlet 31 and the suction port 6 is partitioned, and the air around the inlet 31 is less likely to be blown from the suction port 6 so that the suction force from the inlet 31 can be reduced. Can be prevented. That is, the suction interference between the two due to the flow at the inlet 31 (arrow B) and the flow at the suction port 6 (arrow C) can be prevented as much as possible. When the opening 53 is formed as in the first embodiment, a wind noise caused by the wind passing through the opening 53 is generated, but this can be prevented in this embodiment.

  As shown in FIG. 7, by setting the height dimension of the rib 52 to be higher than the height dimension (protrusion dimension) of the inlet 31, the suction interference is more reliably prevented. Further, as shown in FIG. 8, by setting the length of the rib 52 to be longer than the vertical length of the inlet 31, suction interference is more reliably prevented.

  The rib 52 may be anywhere between the inlet 31 and the suction port 6, and as shown by a dotted line in FIG. 4, a ring-shaped wall formed around the suction grill 16 is arranged on the rear side. You may make it protrude toward it. Alternatively, the inlet 31 may be completely closed with a wall, a through-hole is formed in the left-right direction, and this is used as the inlet 31. The other parts are the same as in the first embodiment, so the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

(3rd Example) FIG. 10: shows the further another Example of the hair dryer which concerns on this invention. This embodiment is different from the first embodiment in that the wind generated by the fan 9 is used, but the position of the blowout is different.

  That is, by forming the opening 53 in the inner case 1A between the inlet 31 of the outside air introduction passage 25 and the suction port 6, the air blown out from the main body case 1 becomes an air curtain, so that the flow of the suction port 6 is changed to the inlet. This prevents the air flow sucked from 31 from being obstructed. However, if each opening 53 formed in the main body case 1 is made too large, the momentum of the air blown out from the opening 53 is increased, and the air sucked from the inlet 31 is adversely affected. Set to In order to form an air curtain, the openings 53 are formed side by side in a direction intersecting with the front-rear direction of the main body case 1 as shown in FIG. To do. The wind blown out is a wind generated by the fan 9, and uses a humid wind that does not pass through the heater unit 11. The other parts are the same as in the first embodiment, so the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

  In any of the above embodiments, the outside air introduction passages 25 are provided on the left and right of the peripheral surface of the main body case 1, but the external air introduction passage 25 may be provided only at one place on the peripheral surface of the main body case 1. In this case, the outer case 1B can be formed in a semicircular cross section. If necessary, three or more outside air introduction passages 25 can be provided.

  The outside air introduction passage 25 does not need to be constituted by the inner groove 26 and the outer groove 27, and can be defined by one of the grooves and a wall that closes the groove opening. The outer groove 27 does not have to be formed by a partially arcuate wall that bulges outward, but can be formed by a U-shaped wall or a trapezoidal wall that is long in the vertical direction, and its bulge size can be reduced. Good. The outside air introduction passage 25 can be formed of a pipe, a duct body or the like with the main body case 1. The ribs 30 can be formed integrally with the outer case 1B. If necessary, the ribs 30 can be divided into the inner case 1A and the outer case 1B, and can be arranged adjacent to each other in a staggered manner.

It is a partially broken top view which shows the principle structure of the hair dryer of this invention. It is a side view of a hair dryer. It is a disassembled perspective view of a main body case. It is the sectional view on the AA line in FIG. FIG. 3 is a sectional view taken along line BB in FIG. 2. It is a front view of a hair dryer. It is a partially broken top view which shows the principle structure of the hair dryer which concerns on the other Example of this invention. It is a side view of the hair dryer which concerns on the other Example of this invention. It is a disassembled perspective view of the main body case of the hair dryer which concerns on the other Example of this invention. It is a side view of the hair dryer which concerns on the further another Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 1A Inner case 1B of main body case Outer case 6 of main body case Inlet 7 Outlet 9 Fan 10 Motor 11 Heater unit 25 Outside air introduction passage 26 Inner groove 27 Outer groove 31 Inlet 32 Outlet 52 Rib 53 Opening

Claims (9)

A fan (9), a fan driving motor (10), a heater inside a main body case (1) having an inlet (6) opened at one end and an outlet (7) opened at the other end A hair dryer in which the unit (11) is arranged,
An outside air introduction passage (25) for introducing outside air by venturi action of dry air generated by the fan (9) is provided on the outer surface of the main body case (1), and an outlet (32) of the outside air introduction passage (25) is an outlet. Open around (7),
The inlet (31) of the outside air introduction passage (25) is at least a predetermined distance (L) forward from the suction port (6) between the front-rear direction center portion of the main body case (1) and the suction port (6). Open to the position,
A hair dryer characterized in that a suction interference preventing means for preventing suction interference between the outside air introduction passage (25) and the suction port (6) is provided.   The hair dryer according to claim 1, wherein the suction interference preventing means is a wind blown out from the main body case (1).   The hair dryer according to claim 2, characterized in that the wind is blown from the vicinity of the inlet (31) in the outside air introduction passage (25).   The hair dryer according to claim 1, wherein the suction interference preventing means is a rib (52) that is long in a direction intersecting with the front-rear direction of the main body case (1). The main body case (1) is configured in a double cylinder shape by an inner case (1A) and an outer case (1B) that is externally fitted to the inner case (1A).
The hair dryer according to any one of claims 1 to 4, wherein an outside air introduction passage (25) is formed between the inner case (1A) and the outer case (1B). An inner groove (26) is formed on the peripheral surface of the inner case (1A) formed in a tapered shape toward the outlet (7), and the depth of the recess increases toward the outlet (32).
An outer groove (27) covering the outer surface of the inner groove (26) extends from the inlet (31) to the vicinity of the outlet (32) and bulges in the outer case (1B).
The hair dryer according to claim 5, wherein the cross-sectional area of the outside air introduction passage (25) from the inlet (31) to the outlet (32) is set to be substantially the same. A transparent outer case (1B) is externally fitted to the inner case (1A),
The hair dryer according to claim 5 or 6, wherein a decorative sheet (37) is interposed on a fitting surface between the inner case (1A) and the outer case (1B).   The hair dryer according to any one of claims 5 to 7, wherein a plurality of ribs (30) for receiving the inner surface of the outer groove (27) are formed at an inlet (31) of the outside air introduction passage (25).   The hair dryer according to claim 8, wherein the plurality of ribs (30) are each formed of a long plate wall in the front-rear direction and are arranged in a multistage shape.

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