JPH04112424A - Electric warm wind blower - Google Patents

Abstract

PURPOSE:To provide an electric warm wind blower whose safety switch operates stably regardless of the condition of floor surface, etc., by mounting a switch button slidably in vertical direction with the aid of an elasticity means. CONSTITUTION:A safety switch 20 is to shut the current feed in the event of a tumble. A switch case 23 is provided accommodating a contact 21 and a movable contact piece 22, and the underside of this switch case 23 is equipped with a boss 24 protruding cylindrically, and a switch button 25 is furnished on the inside of this boss 24. As this safety switch 20 has a stroke consisting in the sum of the standard stroke S3 of the switch button 25 and the stroke S4 of the safety switch itself 20, the switching operation can be made without obstruction even with ordinary recess.

Description

[Detailed Description of the Invention] Lord! FIELD OF THE INVENTION The present invention relates to an electric hot air fan equipped with a safety switch that shuts off electricity in the event of a fall, for example.

A safety switch is generally attached to electric hot air fans to ensure safety in the event of a fall.

Conventionally, the structures shown in FIGS. 6 and 7 are known for this safety installation.

The safety switch shown in FIG. 6 has a contact 53 and a movable contact piece 54 attached to an insulating plate 52 provided inside the bottom 51 of the main body case of the electric hot air fan, and a switch button 55 below the movable contact piece 54. is provided so that it can be slid up and down. The lower part of the switch button 55 is connected to the foot of the main body case (
(not shown) is projected from the lowest end (-dotted chain line) by the standard stroke S1. This standard stroke S1 is determined so that the switch will operate when the electric hot air fan is normally installed on a flat floor surface, etc., and is slightly larger than the separation distance between the movable contact piece 54 and the contact point 53. .

Therefore, when the electric hot air fan is placed in a normal state, the switch button 55 slides upward due to the floor or the like, the movable contact piece 54 is pushed up and comes into contact with the contact 53, and becomes energized, and the electric hot air fan When it falls over or is lifted up, the movable contact piece 54 and the contact point 53 are separated and the current supply is cut off.

On the other hand, in the safety switch shown in FIG. 7, a contact 63 and a movable contact piece 64 are attached to an insulating plate 62 provided inside the bottom part 61 of the main body case, and a part of the safety switch from the bottom part 61 is attached below the movable contact piece 64. The structure includes a switch button 65 consisting of a bottomed cylindrical body 66 that protrudes downward, a spring 67 placed inside the body, and a push-up piece 68 placed on top of the spring 67. When O65 is pressed, the push-up piece 68 rises to turn on the movable contact piece 64, and then the bottomed cylinder 66 rises against the spring 67, and the switch button 6 is turned on.
When 5 is in the non-pressed state, the bottomed cylindrical body 66 descends to turn off the current supply in the reverse operation. The standard stroke in this case is
The length S2 is the length protruding from the lowermost end (-dotted chain line) determined by the legs of the main body case.

However, in either case, the standard strokes SL and S2 for which the switch buttons can move are short, so depending on the condition of the floor, the safety switch may not turn on even if the electric hot air fan is placed normally. Specifically, when the floor surface is uneven and the switch button is located in the recessed part, or the foot of the main body case is located in the convex part, or If the surface is made of carpet with long piles or a soft surface and the switch button is difficult to press,
Even if the electric hot air fan was placed properly, the safety switch would not turn on and the power would not be turned on.

In order to solve the above problem, the standard stroke of the safety switch can be made sufficiently large, but in this case, when the floor surface is flat, the movable contact piece will be pushed more than necessary and the movable Another problem is that the contact piece may become sagging, causing problems with durability, or that the strength of the safety switch itself may be compromised.

The present invention has been made in view of the above circumstances, and provides an electric hot air fan whose safety switch operates stably when placed in a normal state, regardless of the state of the floor surface, etc. The purpose is to

i 7 The present invention is an electric hot air fan in which a safety switch for turning on and off electricity is provided at the bottom of the main body case, and the safety switch includes a switch button that turns electricity on and off by sliding, This safety switch is characterized in that the switch button faces downward and is slidable in the vertical direction via elastic means.

In the present invention, the safety switch itself, which is equipped with a switch button that turns on and off electricity by sliding, is mounted so that it can slide up and down via elastic means, so that the safety switch The stroke range plus the standard stroke of the switch button is the range in which the safety switch can turn on and off electricity.

EXAMPLE 1 The present invention will be described below with reference to the drawings. FIG. 3 is an external perspective view showing an embodiment of the electric hot air fan according to the present invention, FIG. 1 is a vertical sectional view of the electric hot air fan, and FIG. 2 is a side sectional view of the electric hot air fan. In the figure, 1 is the main body case, which consists of a front case la and a rear case ■b. A fan casing 2 is fixed to the rear case 1b with screws inside the main body case 1, and an electric motor 3 is screwed onto the outside of the fan casing 2. The rotating shaft 3a of the electric motor 3 is inserted into the fan casing 2, and a blower fan 4 is fixed to the inserted portion.

The blower fan 4 is driven by the electric motor 3 to rotate, and this rotation leads external air into the fan casing 2 through the intake port 5 formed in the rear case 1b and the return hole 2a formed in the fan casing 2. .

An opening 2b is formed in the lower part of the fan casing 2, and both ends of a cylindrical guide 8 are attached to the opening 2b and an exhaust lower formed in the lower part of the front case 1a. A heater 9 such as a ceramic heater is disposed in the middle of this guide 8. Therefore, the air inside the fan casing 2 is guided to the heater 9 through the guide 8, heated there, and then discharged as warm air from the exhaust lower. During this discharge, the wind direction can be changed by a looper 7a formed in the exhaust lower.

By the way, 10 in the figure is a filter frame that covers the intake port 5 formed in the rear case 1b, for example, and is detachably mounted in a recess 5a formed around the intake port 5. Note that the filter frame 10 may be formed separately from the rear case 1b. The filter frame 10 is formed in a lattice shape with ribs, and has an opening 10a at the top for inserting a buri-filter, and a buri-filter body 11 integrally molded from resin is accommodated through this opening 10a. There is.

The brisfilter body 11 is a bristle filter having a mesh formed integrally with resin, for example, and has a handle portion 11a projecting from its upper resin portion. Further, near the opening 10a in the filter frame 10, a dust removal rib 10b is formed which always comes into contact with the surface of the filter body 11.

In addition, a humidifying unit (B) is arranged near the warm air unit (B). This humidifying unit B transfers water supplied from the tank 13 to the water tank 12.
Steam is generated using an ultrasonic vibrator 12a provided in the. Further, a fan 15 driven by an electric motor 14 is provided below the water tank 12 . This fan 15 sucks air and introduces the sucked air into a cylinder 16 that is integrally formed above the water tank 12 and whose upper part is above the water surface via piping (not shown), Guide it to the top of the water tank 12. Then, the guided air is accompanied by steam,
A guide cylinder 1 located above the cylinder 16 and covering the cylinder 16
7, the lid 18 attached to the upper opening of the guide cylinder 17
The steam is discharged from a steam outlet 18a formed in the steam outlet 18a.

A safety switch 20, which is an important part of the present invention, is provided on the bottom 1c of the main body case 1 of the electric hot air fan configured as described above. This safety switch 20 is for cutting off electricity in the event of a fall, etc., and is configured as shown in FIG. 4.

That is, a switch case 23 is provided which has a contact 21 and a movable contact piece 22 inside, and a cylindrical boss part 24 is formed protruding from the lower side of the switch case 23.
A switch button 25 is provided on the inside of 4. The switch button 25 includes a bottomed cylindrical body 26 whose lower end opening is closed, a spring 27 wound in a coil shape for pressing mounted inside the bottomed cylindrical body 26, and a lower part inside the spring 27. The push-up piece 28 is attached. The bottomed cylindrical body 26 is in such a state that its lower portion does not fall off from the boss portion 24 on the lower side of the switch case 23.

The operation of the switch button 25 is such that when the switch button 25 is pressed, the push-up piece 28 rises to turn on the movable contact piece 22, and then the bottomed cylindrical body 26 rises against the spring 27. When the switch button 25 is not pressed, the switch button 25 moves down due to the reverse operation, and the contact 21
The movable contact piece 22 is separated from the main body, and becomes in a non-energized state. In addition,
The standard stroke S3 of this switch button 25 is almost the same as the standard stroke S2 in FIG.

Moreover, the safety switch 20 itself having such a structure,
It is designed to be slidable. Specifically, a safety swing 20 is provided in a guide rib 30 integrally formed inside the case bottom IC so as to surround the upper part of the through hole 1d, with the switch button 25 facing downward. The lower part of the boss portion 24 passes through a through hole 1d formed in the bottom IC of the main body case l and is exposed to the lower side. The guide ribs 30 include guide ribs 30a, 30b, and 30c provided on the left, right, and rear sides of the safety switch 20. Therefore, in addition to the above-mentioned switch button 25 sliding, the safety switch 20 itself also slides.

The lower limit of the stroke range S4 in which the safety switch 20 itself slides is a position where the lower surface of the switch case 23 contacts the inner surface of the case bottom 1c, and the upper limit is a rib provided at the bottom of the fan casing 2 that projects downward. 31
This is the position where the upper surface of the switch case 23 comes into contact with the lower end of the switch case 23 (the position indicated by diagonal lines in FIG. 1). Note that the lower limit position can be changed, for example, by providing a protrusion at a predetermined height on the inner surface of the guide rib 30.

and the slideable safety switch 20 as described above.
is pressed downward by a spring TJ ring 32 provided between the rib 31 and the upper surface of the switch case 23.

Therefore, the electric hot air fan according to the present invention includes a safety switch 20 that slides in two stages and has a sliding amount equal to the standard stroke S3 plus the stroke range S4. Therefore, in the hot air fan of the present invention, electricity can be turned on and off without being affected by the state of the floor surface.

That is, by making the pressing force of the spring 32 that presses the safety switch 20 larger than the elastic force of the movable contact piece 22 provided inside the switch, the electric hot air fan can be placed on a flat floor or the like in a normal state. When the safety switch 20 is installed, the switch button 25 of the safety switch 20 is first pushed in by a standard stroke of 53 minutes. Also, if the floor surface is uneven and the switch button 25 is located on the convex part, the switch! D25 enters the limit and the movable contact piece 22
Even if the movable contact piece 22 is pressed more than necessary, causing a problem in the durability of the movable contact piece 22, the safety switch 20 itself is pushed upward after the switch button 25 is pushed to the limit, so the movable contact piece 22 An excessive pressing force is not applied to the movable contact piece 22, and the durability of the movable contact piece 22 can be improved.

Conversely, even if the switch button 25 is located in a recess on the floor,
Since this safety switch 20 has a stroke equal to the length of the standard stroke S3 of the switch button 25 plus the stroke range S4 of the safety switch 20, the switch operation can be performed without any problem even in a normal recess.

Furthermore, even if the floor surface is soft, such as carpet, the sliding amount of the safety switch 20 is equal to the standard stroke S3 plus the stroke range S4, so there is no problem in the operation of the switch.

Note that the structure of the safety switch 20 is not limited to the one described above, and other structures may be used. In short,
Any structure may be used as long as it has a switch button that turns on and off electricity by sliding.

Furthermore, the structure for mounting the safety switch is not limited to the above-mentioned structure, and may be other structures.

For example, it is also possible to attach a spring to pull the safety switch downward.

Furthermore, in the case of the above embodiment, the dust removal rib 10b is provided so as to always come into contact with the filter body 11 disposed outside the intake port 5 as described above.
It has the following effects.

That is, when removing the Buri filter 11 from the opening 10a,
If there is dust on the surface of the filter, remove the rib 1 above.
0b removes dust from the surface of the buri filter 11,
This means that large amounts of dust can be removed by scraping it to the bottom. By repeating this sliding up and down several times, dust is removed and the brifilter 11 becomes clean. Therefore, with such a configuration, there is no need to remove the filter body 11 and the filter frame 10 and remove dust.

Further, even if it is desired to remove the filter body 11 and clean the surface more, the effort is reduced because large dust particles have already been removed.

Furthermore, in the past, the brifilter was attached to the outside of the intake port 5, and the filter frame was attached on top of it, so in order to remove the brifilter, first remove the outer filter frame, and then remove the inner filter frame. It was necessary to remove the filter, which was cumbersome, but there is an advantage in that it can be easily installed and removed by simply holding the handle 11a and sliding it.

Note that the ribs 10b do not need to be formed integrally with the filter frame 10, and may be made of an elastic material such as rubber made of a material different from that of the filter frame 10, or a brush body to improve the dust removal effect. I can help.

Further, the position of the opening 10a provided in the filter frame 10 is not limited to the above-mentioned upper part, but may be provided at the lower part or at a position 4 degrees left and right.

As detailed above, in the case of the present invention, the stroke range of the safety switch plus the standard stroke of the switch button is the range in which the safety switch can turn on and off electricity. The power can be turned on and off without being affected by the unevenness of the floor surface or the material of the floor surface such as carpet, allowing for greater flexibility in where the electric hot air fan can be installed, and a safety switch. Since it is attached via an elastic means such as a spring, it is possible to relieve the strong stress applied to the safety switch itself when the main body is installed or dropped, and has the excellent effect of improving the durability of the safety switch.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the electric hot-air fan according to the present invention, FIG. 2 is a side cross-sectional view of the electric hot-air fan, FIG. 3 is an external perspective view of the electric hot-air fan, and FIG. The figure is a longitudinal sectional view showing the safety switch itself, FIG. 5 is an external perspective view showing the vicinity of the filter frame 10, and FIGS. 6 and 7 are sectional views showing the structure of a conventional safety switch installation. . 1... Main body case, 1c... Bottom, 20... Safety switch, 25... Switch button, 32... Spring. Patent applicant: Sanyo Electric Co., Ltd. Agent: Patent attorney Shiro Nakajima Figure 2 Figure 4 Figure 3 Figure 5

Claims (1)

[Claims] (1) In an electric hot air fan that is equipped with a safety switch that turns on and off electricity at the bottom of the main body case, the safety switch has a switch button that turns electricity on and off by sliding, and this safety switch
An electric hot air fan characterized in that the switch button is directed downward and is slidable in the vertical direction via elastic means.