JPH0793890B2 - Hair dryer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hair dryer, particularly a portable hair dryer.

[Background Art] Portable hair dryers are strongly demanded to be miniaturized from the viewpoint of portability, but the air volume and heater capacity are reduced as they are miniaturized, and the original drying capability is poor. Becomes

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is that it is excellent in storability and portability, and has a large air volume and a large heater capacity and a high drying capacity during use. To provide hair dryers.

DISCLOSURE OF THE INVENTION The present invention, however, provides a hair dryer in which a heater and a fan are housed in a housing, in which the housing is expandable and contractible in the thickness direction, and the rotation axis direction is the thickness direction of the housing. Along with the expansion and contraction of the housing, the housing is made expandable and contractible in the axial direction, and the heater divided into a plurality of parts is arranged in association with the expansion and contraction of the housing. , It is assumed that the shape of the fan and the heater change according to the expansion and contraction according to the thickness of the housing, and although it is compact at the time of storage, the fan and the heater are deployed in conjunction with the housing at the time of use, The feature is that a large amount of air and high temperature hot air can be sent out.

The present invention will be described in detail below with reference to the illustrated embodiments.
FIG. 13 to FIG. 13 show an embodiment of the present invention, which is a flat box-shaped housing and is provided with suction portions 15 and 15 on both sides.
As shown in FIG. 6, a pin 65 and a cylinder shaft 66 with which the pin 65 is fitted are provided at one of the four corners, and the handle is provided around the cylinder shaft 66. 2 is rotatably attached, and at other three corners, as shown in FIG. 7 and FIG. 8, a connecting pin 60 is inserted and at the same time, it is between both housings 11 and 12. An elastic spring 61 is provided. The housing 1 is expandable and contractable in the thickness direction. In addition, since the joint wells 18 and 18 that overlap each other are provided on the inner surfaces of the housings 11 and 12, respectively,
Fan block 3 and heater 4 which will be described later
A and 4B are not exposed to the outside. Also, the housing 1
A power switch (not shown) is turned on and off in accordance with expansion and contraction of the. Reference numeral 7 in the drawing denotes a switch handle of a switch 70 for switching between hot air and cold air.

The fan block 3 driven to rotate by the motor 30 is
Of the two housings 11 and 12, the fan block 3 mounted on the inner surface of the housing 12 is formed as a multi-blade centrifugal fan (sirocco fan).
Is composed of a first fan 31 and a second fan 32. As shown in FIGS. 11 and 12, the first fan 31, to which the second fan 32 is axially connected by the coil spring 33, has a support portion that supports one edge of the blade 31a. Wings 3
2a is provided with a fitting groove 31b, and when the second fan 32 is axially pressed against the first fan 31, the blades 31a are fitted between the blades 32a, so that the fan block 3 has an axial direction. Is reduced and released, the second fan 32 projects axially from the first fan 31 by the force of the coil spring 33,
The state shown in FIG. 11 is obtained. The first fan 31 is the motor 30.
Is press-fitted and fixed to the output shaft of the second fan 32, and the second fan 32
Thus, the rotational force is transmitted from the first fan 31. Reference numerals 31c and 32c in FIG. 11 are joint reinforcing ribs.

On the inner surface of the housing 11, the heater 4A is
Although the heater 4B is attached to the inner surface of the heater 12, both heaters 4A and 4B are provided at positions displaced from each other, as is apparent from FIGS. 3 and 5. Further, a voltage dividing resistor 40, a thermoswitch 41, etc. are attached to the inner surface of the housing 12. Discharge grids 16 and 17 are provided in the discharge part where the air from the fan block 3 is discharged. The discharge grid 16 provided in the housing 11 and the discharge grid 17 provided in the housing 12 are arranged in the front and rear. It is formed to intersect with.

Of the circular suction portions 15 and 15 provided in the housings 11 and 12 and having a large number of suction holes formed in the peripheral portion, the suction portion 15 on the housing 12 side is apparent from FIGS. 2 and 3. As described above, although the suction portion 15 on the housing 11 side is formed integrally with the housing 12, it is formed as a separate member rotatable with respect to the housing 11, and is locked toward the other housing 12 side. Ribs 14 are provided so as to project. By rotating the suction portion 15 and engaging the locking rib 14 with the locking piece 13 formed on the inner surface of the housing 12, the housing 1 can be held in a contracted state.

Further, a handle 2 rotatably attached to the housing 1 includes a thin base portion 20 as shown in FIG. 13 and a holding portion 21 having a U-shaped cross section and a large thickness. Are formed from. Although the base portion 20 has a thickness that can be accommodated between the housings 11 and 12 in a contracted state, the holding portion 21 has a thickness that can be put on the outer surfaces of the housings 11 and 12 in a contracted state, By rotating the housing 1 to cover the holding portion 21, the locking rib 14 and the locking piece 13 are engaged with each other, and the housing 1 is rotated.
Hold in a reduced state.

Then, from the contracted state shown in FIGS. 1 to 3, the handle 2 is rotated to remove the holding portion 21 from the housing 1, and the suction portion 15 on the housing 11 side is rotated so that the locking rib 14 is released. If removed from the locking piece 13, both housings 11,1
The housing 61 and 12 are expanded by the spring 61 that is located between the two and springs them out, and the fan block 3 also expands to the state shown in FIGS. 4 and 5, and the first fan 31 in the fan block 3 blows air. Heater 4B in front of direction
However, the heater 4A is located in front of the second fan 32 in the blowing direction.

After use, if the housing 1 is compressed in its thickness direction, the fan block 3 will also be collapsed. After that, the handle 2 is rotated to cover the holding portion 21 on the housing 1 and engage with the locking ribs 14. By engaging the stop piece 13, the thickness can be reduced to about half of that during use. Further, since the discharge portion is covered by the handle 2, invasion of dust or the like can be prevented.

14 to 18 show another embodiment. Here, the heaters 4A and 4B, which are divided into two to be attached to the inner surfaces of the housings 11 and 12, respectively, are configured by arranging a plurality of rows of heater wires bent in a zigzag shape, and at the same time, on the inner surface of the housing When the row of the heater wires of the attached heater 4A faces between the rows of the heater wires of the heater 4B attached to the inner surface of the housing 12, when the housing 1 is reduced in its thickness direction, the heater 4A, Each 4B heater wire is first
As is clear from Fig. 8, these are designed to intersect. As compared with the case of the above-mentioned embodiment, the space required for arranging the heaters 4A and 4B is reduced, so that it can be made more compact. Since the power switch is automatically turned off when the heater is reduced, the insulation distance between the heaters 4A and 4B does not pose a problem.

19 to 27 show still another embodiment. As shown in FIGS. 20 and 21, the handle 2 has a U-shaped cross section, and has a widest first opening 22a, and a second widest opening 22b. It has three of the narrowest third openings 22c,
The openings 22a, 22b, 22c are connected by inclined edges. The handle 2 slides in the slide groove 23 formed on the outer surface of the housing 1,
It is possible to switch from the state of covering the discharge portion to the state of protruding downward as shown in FIG.

As shown in FIG. 23, a pair of protrusions 73 and 74 are provided on the inner surface of the housing 11, and the power switch 71, the air volume and the heater are provided on the inner surface of the housing 12 at a position facing the both protrusions 73 and 74. A changeover switch 72 for changing the capacity is installed as shown in FIG.

Now, the handle 2 protrudes downward and the slide groove 23 has the first
When the opening 22a is engaged, the housing 1 is in the state where the thickness thereof is widest, the power switch 71 is in the on state, and the changeover switch 72 is in a large air volume as shown in FIG. Moreover, the heater capacity is being increased. However, if the handle 2 is slid slightly to bring the second opening 22b into engagement with the slide groove 23, the housing 1 is made slightly thinner, and the housing 25
As shown in the figure, the changeover switch 72 is switched by the protrusion 74. Therefore, at this time, the operation is performed with a small air volume and a small heater capacity. If the handle 2 is further slid to bring the third opening 22c into engagement with the slide groove 23, the discharge portion will be covered with the handle 2 and the housing 1 will be at the thinnest state. Further, the protrusion 73 turns off the power switch 71. FIG. 27 shows a circuit diagram. The protrusion 19 provided on the inner surface of the housing 11 is provided at the center of rotation of the second fan 32 so that the rotation of the fan block 3 in the state shown in FIG. 25 does not hinder the contact with the inner surface of the housing 11. They are in contact with each other, and the tip has an arc shape.

28 to 31 show an embodiment in which the housing 1 is divided into three parts in the thickness direction. A pair of housings 11 and 12 forming both side surfaces, and an intermediate frame 1 that connects the housings 11 and 12 in the middle of the pair.
The housing 1 is composed of 0, and the thickness of the housing 1 changes as the housings 11 and 12 slide with respect to the middle frame 10. The middle frame 10 here is
As shown in FIG. 30, a blowout port 80 is provided on the front surface, and locking ribs 85 for engaging the projections 86 on the opening edges of the housings 11 and 12 at both side ends of the upper and lower surfaces to regulate the sliding amount of the housings 11 and 12. , 85
When the housing 1 is unfolded, the outlet 80 is aligned with the outlets 81 and 82 provided on the front surfaces of the housings 11 and 12, respectively.

When the housing 1 is configured by three divisions including the middle frame 10 as described above, the space d ₁ between the outer circumference of the first fan 31 and the inner surface of the housing 1 in the fan block 3 is defined by the outer circumference of the second fan 32 and the housing 1. It can be the same as the space d ₂ between the inner surface and the inner surface, and compared to the case where the housing 1 is divided into two parts as shown in FIG. It is possible to make the wind velocity distribution uniform in the parts, and prevent variations in wind temperature and overheating of the heaters 4A and 4B.

In the embodiment shown in FIGS. 33 to 35, the handle 2 is attachable to and detachable from the housing 1, and the handle 2 having a U-shaped cross section is folded into a state in which the housing 1 is expanded and is made smaller in size. The handle 2 can be used as both a lock in two states, and in the folded state, the handle 2 is engaged by engaging with the slide groove 23 formed on the outer surface of the housing 1. This state is maintained and the ejection portion is covered. When the housing 1 is opened for use, the handle 2 is pulled out, and one end of the handle 2 is fitted into the fitting grooves 88, 88 formed on the lower surfaces of the housings 11 and 12, so that the handle 2 can be housed. At the same time, the housings 11 and 12 are prevented from being shrunk at the same time that the housings 11 and 12 are made to protrude. In this case, the thickness required for the handle 2 can be made substantially equal to the thickness of the housing 1 in the reduced state, so that the storability and portability are further improved. In the figure, 5 is a power cord bush, and 89 is a relief groove for this power cord bush.

FIGS. 36 and 37 show that the power cord bush 5 is formed as a connector 50 so that it can be attached to and detached from the housing 1, and at the same time, the connector 55 is provided with the terminal pins 56, 56 on the housing 1 side to insert the connector 55. When the housing 1 is folded, it will be covered by both the housings 11 and 12. If the connector 50 is inserted into the exposed jack 55 by unfolding the housing 1 for use, the housing 1 will be covered by the connector 50. It is designed so that it cannot be reduced. When connecting the connector 50, the housing 1 must be fully opened, and since the connector 50 must be pulled out before storing, there is a locking effect in the fully opened state, and at the same time safety It has been improved.

FIG. 38 shows another structure of the discharge part when the housing 1 is divided into two in the thickness direction. Here, it is assumed that the discharge grid 16 in the housing 11 and the discharge grid 17 in the housing 12 alternately project, and these discharge grids 16, 17
When the housing 1 is shrunk so that the width of the discharge passage becomes substantially equal to the width of the opening between the other discharge grids 17 and 16, the discharge portion is fully closed as shown in FIG. Prevents dust from entering inside.

FIG. 39 shows another embodiment of the fan block 3.
Although the first fan 31 and the second fan 32 and the coil spring 33 connecting both of them in the axial direction are the same as those in the above-described embodiment, the blade 32 of the second fan 32 is used here.
The difference is that a protrusion 32d for retaining is provided at one end of a so as to be engaged with the support portion of the blade 31a of the first fan 31. First
The axial protrusion amount of the second fan 32 from the fan 31 is the protrusion 32d.
Since the coil spring 33 is restricted by the first fan 31 and the second fan 32, the coil spring 33 may be simply sandwiched between the first fan 31 and the second fan 32.
Since it is not necessary to press-fit and fix the fan 31 and the second fan 32, the assemblability and reliability are improved, and the first fan 31 and the second fan 32 are coupled at a position close to the outer peripheral portion. The holding strength is also increased, and the reliability of rotation of the fan block 3 is also increased.

[Advantages of the Invention] As described above, in the present invention, since the housing is capable of expanding and contracting in the thickness direction thereof, the thickness can be reduced when it is stored and carried, which is excellent in storability and portability. In addition, since the fan expands and contracts in conjunction with the expansion and contraction of the housing and the shape of the heater changes, it is possible to use a shape that is thick and has a large amount of heat and a large amount of heat when used, and the drying capacity is high. In addition to being high, the flow of air and the heating by the heater can be prevented from becoming uneven.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a horizontal sectional view of the same, FIG. 3 is a vertical sectional view of the same, and FIGS. 4 and 5 are front and vertical sectional views in use. FIG. 6 is a cutaway bottom view in use, FIGS. 7 and 8 are partial sectional views, FIG. 9 is a front view showing the inner surface of one housing, and FIG. 10 is a front view showing the inner surface of the other housing. Figures, 11 and 12
FIG. 13 is a sectional view and a front view of a fan, FIG. 13 is a sectional view of a handle, FIGS. 14 and 15 are longitudinal sectional views of another embodiment, and FIG. 16 is a front view of one housing of the same. FIG. 17 is a front view of the other housing of the same as above, FIG. 18 is a front view showing a state in which heaters of the same are overlapped, FIG. 19 is a front view of still another embodiment, and FIG. A side view, FIGS. 21 (a), (b), and (c) are sectional views of the above handle, FIG. 22 is a front view of one of the above-mentioned housings, FIG. 23 is a front view of the other housing, and FIG. 26 to 26 are vertical sectional views,
FIG. 27 is a circuit diagram of the above, FIG. 28 is a perspective view of another embodiment,
FIG. 29 is a partial cross-sectional view of the same as above, FIG. 30 is a perspective view of the middle frame of the same, FIG. 31 is a partial cross-sectional view of the same as above, FIG. 32 is a partial cross-sectional view of a comparative example, and FIG. A front view of one housing of still another embodiment, FIGS. 34 and 35 are bottom views of the same, and FIG.
FIG. 37 is a front view of one housing of another embodiment, FIG. 37 is a bottom view of the same as above, FIGS. 38 (a) and 38 (b) are side views showing another example of the discharge part, and FIG. It is sectional drawing which shows another example, 1 is a housing, 2 is a handle, 3 is a fan block, 4A, 4B is a heater, 10 is a middle frame, 11 and 12 are housings, 13
Is a locking piece, 14 is a locking rib, and 15 is a suction part.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Koshiro Mikami 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References JP-A-50-42952 (JP, A) (JP, U) Actual development Sho 55-113107 (JP, U)

Claims (10)

[Claims] 1. A hair drier in which a heater and a fan are housed in a housing, wherein the housing is made expandable and contractible in the thickness direction thereof, and a fan whose rotational axis is in the thickness direction of the housing is interlocked with the expansion and contraction of the housing. The hair dryer is characterized in that it is axially expandable and contractible, and that the heater divided into a plurality of parts is arranged in association with the expansion and contraction of the housing. 2. A fan having a flat box shape and divided in the thickness direction thereof, which is formed as a multi-blade centrifugal type and whose axial direction is the thickness direction of the housing, has a shaft formed through a coil spring. The hair dryer according to claim 1, comprising a first fan and a second fan connected in a direction. 3. The housing according to claim 1, wherein the housing is formed in a flat box shape and is divided into two parts in the thickness direction, and heaters which are divided into inner surfaces of the two divided housings are attached to the respective housings. Hair dryer as described. 4. The housing has a flat box shape and is divided in the thickness direction thereof, and has a handle having a U-shaped cross section and having a lock portion for holding the contracted state of the housing so that the handle can be housed. The hair dryer according to claim 1, characterized in that 5. The housing has a flat box shape and is divided in its thickness direction, and one housing is rotatably provided with a suction portion having locking ribs protruding toward the other housing. The hair dryer according to claim 1, further comprising an engaging piece provided on the inner surface of the other housing to engage with the engaging rib and hold the housing in a contracted state. 6. The hair dryer according to claim 1, wherein the housing is provided with a power switch driving unit that turns on and off the power switch in conjunction with expansion and contraction of the housing. 7. The hair dryer according to claim 1, wherein the housing is provided with a changeover switch driving section for changing over the power consumption of the heater and the rotation speed of the fan in association with expansion and contraction of the housing. 8. A housing having a flat box shape, which is divided into three parts in a thickness direction thereof and is composed of a pair of housings and an inner frame connecting the two, to each other. The hair dryer according to the item. 9. The housing has a flat box shape and is divided in the thickness direction, and a handle mounting portion to which a handle having a U-shaped cross section is detachably mounted is provided between the housing outer surface and the divided housing. The hair dryer according to claim 1, wherein the hair dryer is provided at a location. 10. The heater is constructed by arranging a plurality of rows of heater wires bent in a zigzag shape, and the rows of the heater wires attached to the inner surface of one housing are attached to the inner surface of the other housing. The third aspect of the present invention is characterized in that the heater lines face each other between the rows of the attached heater wires.
The hair dryer according to the item.