JP2001173589A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency when the product of an electric fan using a cushion body for a grounding part is assembled. SOLUTION: A press fit part 26 into which a cushion body 25 is pressed is formed in the peripheral part of the rear surface side of a stand base part 11 for supporting a blowing part. After the cushion body 25 is pressed into the press fit part 26 and temporarily fixed, a part (recessed part 25b) of the temporarily fixed cushion body 25 is pressed by a bottom plate fixed by a screw so as to fix the cushion body 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan having a stand base.

[0002]

2. Description of the Related Art In this type of electric fan, generally, P
A grounding portion projecting from the stand base portion made of P (polypropylene) resin or the like is integrally formed on the rear surface side outer peripheral portion of the stand base portion at an interval.

However, in this case, when the electric fan placed on the installation surface such as a tatami mat or a flooring floor is moved while being dragged, the grounding portion integrally formed of resin rubs the installation surface, and Surface, flooring floor, etc.

Therefore, the bottom plate fixing screw is inserted into a ring-shaped cushion body in which the screw head is buried, and fastened together with the bottom plate to the screw fixing point on the outer peripheral edge of the bottom plate of the stand base. The grounding portion of the base portion is formed of a cushion body so as to prevent the tatami surface or the flooring floor from being damaged.

[0005]

However, in such a conventional fan, the bottom plate must be screwed by inserting a bottom plate fixing screw through the annular cushion body during product assembly. Generally, the bottom plate of the stand base is screwed with an automatic machine.However, with the above-mentioned products, the cushion body cannot be temporarily fixed to the bottom plate side. Therefore, an automatic machine could not be used and the efficiency of the product assembling work was very poor.

If the grounding portion is formed of a cushion body, it is possible to prevent the tatami surface and the flooring floor from being damaged, but the stability of the fan having a high center of gravity is reduced, so that the body of a child or the like touches the fan. When tilted, it becomes easy to fall down.

Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to improve the efficiency of assembling products of a fan using a cushion body in a ground contact portion.

It is another object of the present invention to provide an electric fan which does not easily fall down even when a cushion body is used for a ground contact portion.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cushion body which is provided at an outer peripheral portion of a stand base portion supporting a blower portion on a rear surface side with a space therebetween. In the electric fan having the grounding portion, a press-fit portion for press-fitting the cushion body is formed on the outer peripheral portion on the rear surface side of the stand base portion, and the cushion body is press-fitted into the press-fit portion and temporarily fixed, and then fixed with screws. The cushion body is fixed by pressing a part of the cushion body temporarily fixed with a bottom plate.

Further, the press-fitting portion is formed outside a bottom plate mounting boss for screwing an outer peripheral edge of the bottom plate.

[0011] On the other hand, in a fan having a grounding portion formed by a cushion body protrudingly arranged at an interval on an outer peripheral portion on a back surface side of a stand base portion supporting a blower portion, An auxiliary grounding portion having a shorter protruding length than the cushion body is formed between the cushion bodies.

Further, an auxiliary holding portion having a shorter protruding length than the cushion body is formed on the outer peripheral portion on the rear surface side of the stand base portion so as to correspond to each cushion body.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 7, a fan to which the invention of the present application is applied has a stand base 12 detachably mounted on a stand base 11 of a fan main body 1 and a slide pipe attached to the stand support 12. 13 is inserted so as to be able to move up and down, and the upper end thereof has a blade 1 rotatably driven by a motor 14.
An air blower 17, which is covered by a guard 16, is attached to be swingable in the left-right direction.

The stand base portion 11 is made of PP (polypropylene) resin, and on the upper surface thereof, a main body side operation panel 18 is provided in front of the stand support portion 12, and a remote control 100 which can be remotely operated is provided in front of the operation panel. A remote control storage section 19 for storing is formed.

FIG. 1 is a view showing the back side of the stand base portion 11 and shows a state before the bottom plate 20 shown in FIG. 3 is attached, and FIG. 2 is an enlarged view of a main part after the bottom plate 20 is attached. .

An annular rib 22 is formed on the back side of the stand base portion 11 inside the outer peripheral edge 21 of the stand base portion 11, and is arranged at substantially equal intervals integrally with the annular rib 22. A plurality of (here, five) bottom plate mounting bosses 23 for screwing and fixing the bottom plate are formed.

On the outer side of the bottom plate mounting boss 23, a cushion mounting rib 24 is formed which extends from the annular rib 22 to the stand base outer peripheral edge 21 in a trapezoidal shape. These annular rib 22, bottom plate mounting boss 23, cushion body mounting rib 24, and stand base outer peripheral edge 21
, A press-fit portion 26 into which the cushion body 25 of the same shape is press-fitted is formed, and the cushion body 25 is press-fitted and temporarily fixed as shown in FIG.

The cushion body 25 of the present embodiment is made of an elastomer resin, which is a rubber-like elastic body, and has a projecting portion 25a formed on the outside of the trapezoid, and a projection screw hole 27 for the bottom plate 20 formed on the inside. Recess 25 corresponding to portion 28
b is formed. Therefore, when the bottom cover 20 is fixed with the screws 29 as shown in FIG.
As a result, the concave portion 25b of the cushion body 25 is pressed down and is firmly fixed.

Outside the cushion body press-fitting portion 26, a cushion body 25 is attached to the outer peripheral edge 21 of the stand base portion.
An auxiliary holding portion 30 having a shorter protruding length than the protruding portion 25a is formed. Further, the auxiliary grounding portion 31 which is located at a substantially central portion between the cushion bodies 25 (the angle formed with each cushion body 25 is equal angle a °) and has a shorter protruding length than the protruding portion 25a of the cushion body 25 is provided. Is formed.

FIG. 4A is a longitudinal sectional view of a portion where the cushion body 25 and the auxiliary holding portion 30 are provided, FIG. 4B is a longitudinal sectional view of a portion where the grounding portion is not provided, and FIG. FIG. 3 is a longitudinal sectional view of a portion where a grounding section 31 is provided. As shown in the figure, the protruding portion 25a of the cushion body 25 protrudes most and is grounded to the fan installation surface B, and the auxiliary holding portion 30 and the auxiliary grounding portion 31 integrally formed with the outer peripheral edge 21 of the stand base are (b) Outer edge 21 of the stand base shown in FIG.
Although it protrudes below the lower end, it is formed shorter than the protruding portion 25 a of the cushion body 25. Therefore, the auxiliary holding portion 30 and the auxiliary grounding portion 31 do not damage the tatami mat surface, the flooring floor, and the like.

With the above configuration, the cushion body 25 can be press-fitted into the press-fitting portion 26 of the stand base portion 11 and temporarily fixed, so that the cushion body 25 can be assembled to the stand base portion 11 in advance. In this state, since the bottom plate 20 can be screwed by an automatic machine, the product assembling efficiency is improved.

The cushion body press-fitting portion 26 is
Since the bottom plate 20 is formed outside of the bottom plate mounting boss 23 for screwing the outer peripheral edge of the bottom plate 20, the cushion body 25 near the bottom plate 20 can be firmly fixed by screwing the bottom plate 20.

Further, by forming the auxiliary holding portion 30 having a shorter protruding length than the cushion body 25 outside each cushion body 25, the holding force of the cushion body 25 can be improved and the auxiliary holding portion 30 can be used. It is possible to prevent the tatami surface and the flooring floor from being damaged.

The cushion body 25 is located at a substantially central portion between the cushion bodies 25 where the inclination is most likely to occur.
By forming the auxiliary grounding portion 31 having a shorter protruding length, even if the fan main body 1 is tilted in a direction without the cushion body 25, the auxiliary grounding portion 31 formed between the cushion bodies 25 is formed.
Can be prevented from falling to the ground.

On the other hand, in this embodiment, the slide mechanism between the stand support 12 and the slide pipe 13 is also improved, and this will be described with reference to FIGS.

The stand support 12 and the slide pipe 13 of the present embodiment are provided at the upper end opening of the stand support 12.
An annular cover 40 having an inner diameter corresponding to the outer diameter of the slide pipe 13 is attached.
Insert and assemble. Therefore, the slide pipe 1
The stand support 12 and the slide pipe 13 can be assembled with the blower 17 still attached to the upper end of 3. The annular cover 40
As shown in FIG. 6, the locking claw 41 hanging down from the annular cover 40 is caught by the projection 42 formed on the inner wall of the stand support 12, and the slide pipe 13 is not disengaged as shown in FIG. The elastic piece 43 formed on the lower side is caught inside the annular cover 40 and does not come off.

The upper end of the stand post 12 of this embodiment is formed in a stepped shape with a step 44 formed on the outside.
2 is formed with an annular groove 45 in which the upper end of the stand support 12 is fitted.
It is configured to fit into. The stand support 12 is made of a general ABS (acrylonitrile butadiene styrene) resin, while the annular cover 40 is made of a POM (polyacetal) resin having excellent mechanical strength and abrasion resistance. I have.

Conventionally, as disclosed in Japanese Unexamined Patent Publication No. 9-264290 (F04D 25/08 306), it is fitted inside the upper end of the stand support so as to fill the gap between the stand support and the slide pipe. An annular cover was formed, and the upper end of the stand support was exposed. Therefore, when a lateral force is applied to a blower or the like attached to the upper end of the slide pipe, a gap is easily generated between the upper end of the stand support and the annular cover.

On the other hand, in the present embodiment, the upper end of the stand support 12 is covered and held by the annular cover 40 over the entire circumference. Thereby, even if a lateral force is applied to the upper part of the slide pipe 13, no gap is generated between the upper end of the stand support 12 and the annular cover 40. In addition, since the upper end of the stand support 12 where cracks and the like are likely to occur is held by the annular cover 40 all around, the strength is increased. In addition, even if a gate (gate) for molding is provided at the upper end of the stand support 12, there is an advantage that the gate mark does not appear on the surface.

The annular cover 40 is provided at one end with a push button 47 which is exposed from the rear opening 46 of the annular cover 40, and at the other end via the fulcrum 48 on the outer peripheral surface of the slide pipe 12. Hook part 49 urged toward
Is attached.

At the lower end of the slide pipe 13 is attached a spring housing 52 for housing a constant load spring 51 wound in a spring shape. This constant load spring 51
The end 51 a is attached to the rear side of the stand support 12, and is wound and housed in a spring housing 52 in a spring shape. The urging force for pressing the hook 49 of the rotating lever 50 toward the slide pipe 13 is obtained by the end 51a of the constant load spring 51 pressing the hook 49 of the rotating lever 50 from the back. The hook portion 49 is engaged with a concave portion (not shown) formed above the slide pipe 13 so that the slide pipe 13 is locked at that position.

Conventionally, as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-264290, in order to obtain the urging force of the rotating lever, the end of the constant load spring is used as in the present embodiment. However, the mounting position of the end portion of the constant load spring is on the back side of the rotating lever, and the spring end portion presses just below the fulcrum of the rotating lever. Therefore, the lock becomes loose, the operating force becomes heavy, and the outer diameter of the stand support part also becomes large.

On the other hand, in the embodiment, the hook portion 49 pressed by the end portion 51a of the constant load spring 51 is close to the point of application (far from the fulcrum 48), so that a reliable locking effect can be obtained. . Also, the end 51a of the constant load spring 51
Since the mounting position is below the rotating lever 50, it is not necessary to secure the mounting space as compared with the above-described prior art which is mounted on the back side of the rotating lever 50. Can be reduced, and the advantages of slimness of the stand support portion 12 and design can be obtained.

[0035]

As described above, according to the invention of the present application, in a fan having a grounding portion with a cushion body protrudingly arranged at an interval on an outer peripheral portion on the back surface side of a stand base portion supporting a blower portion, A press-fit portion for press-fitting the cushion body is formed on the outer peripheral portion on the back surface side of the base portion, the cushion body is press-fitted into the press-fit portion and temporarily fixed, and then one of the cushion bodies temporarily fixed with the bottom plate fixed by screws. With the configuration in which the cushion body is fixed by pressing the portion, the cushion body can be press-fitted into the press-fitting portion of the stand base in advance and temporarily fixed, and in this state, the bottom plate can be screwed with an automatic machine. Therefore, it is possible to improve the efficiency at the time of product assembly.

Further, since the press-fitting portion is formed outside the boss for attaching the bottom plate for screwing the outer peripheral edge of the bottom plate, the cushion body outside the boss is fixed by screwing the bottom plate. Can be fixed firmly.

On the other hand, an auxiliary grounding portion, which is located between the cushion members and has a shorter protruding length than the cushion members, is formed on the outer peripheral portion on the rear surface side of the stand base portion. Even if it is inclined in a direction where there is no gap, it is possible to prevent the auxiliary grounding portion formed between the cushion bodies from touching the ground and leading to falling.

Further, an auxiliary holding portion having a shorter protruding length than the cushion body corresponding to each cushion body is formed on the outer peripheral portion on the back surface side of the stand base portion, so that the tatami mat surface, the flooring floor and the like are not damaged. The holding force of the cushion body can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing the back side of a stand base of a fan according to an embodiment of the present invention, showing a state before a bottom plate is attached.

FIG. 2 is an enlarged view of a main part after the bottom plate is attached,
(A) is a bottom view, (b) is the AA sectional view.

FIG. 3 is a view showing the bottom plate.

FIG. 4 is a longitudinal sectional view of a main part of the stand base,
(A) is a vertical cross-sectional view of a portion provided with a cushion body and an auxiliary holding portion, (b) is a vertical cross-sectional view of a portion where a grounding portion is not provided, and (c) is provided with only an auxiliary grounding portion. FIG.

FIG. 5 is a longitudinal sectional view showing a slide mechanism of the stand support and the slide pipe in the embodiment.

FIG. 6 is a half sectional view showing a main part of FIG. 5;

FIG. 7 is an overall configuration diagram of a fan to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fan main body 11 Stand base part 12 Stand support part 13 Slide pipe 17 Blow part 20 Bottom plate 21 Stand base part outer peripheral edge 22 Annular rib 23 Bottom plate attaching boss 24 Cushion body mounting rib 25 Cushion body 25a Projecting part 25b recess 26 Press-fit part 28 Overhanging part 29 Bottom plate fixing screw 30 Auxiliary holding part 31 Auxiliary grounding part 40 Annular cover 44 Step part 45 Annular groove 47 Push button 48 Support point 49 Hook part 50 Rotating lever 51 Constant load spring 51a End of constant load spring

Claims (4)

[Claims] 1. A fan having a grounding portion formed by a cushion body protrudingly arranged at an interval on a rear surface side outer peripheral portion of a stand base portion supporting a blowing unit, wherein the stand base portion has a rear surface outer peripheral portion. A cushion body is formed by forming a press-fitting portion for press-fitting the cushion body, press-fitting the cushion body into the press-fitting portion and temporarily fixing the cushion body, and then pressing a part of the temporarily fixed cushion body with a bottom plate fixed with screws. An electric fan characterized in that it is configured to fix a fan. 2. The electric fan according to claim 1, wherein the press-fit portion is formed outside a bottom plate mounting boss for screwing an outer peripheral edge of the bottom plate. 3. A fan having a grounding portion formed by a cushion body protrudingly arranged at an interval on an outer peripheral portion on a rear surface side of a stand base portion supporting a blowing unit, wherein: An electric fan having an auxiliary grounding portion formed between the cushion bodies and having a shorter protruding length than the cushion bodies. 4. An electric fan according to claim 3, wherein an auxiliary holding portion having a shorter protruding length than the cushion body is formed on an outer peripheral portion on a back surface side of the stand base portion so as to correspond to each of the cushion bodies.