JP2013185561A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the strength of abutting parts of a front cover and a rear cover of a motor cover provided with a handhold in a simple structure.SOLUTION: An electric fan includes a motor cover 20 with a front cover 2 and a rear cover 6 of bottomed cylinder shape separably connected in the abutting state of the mutual opening side ends, and a handhold 5 provided at the motor cover 20. One of abutting parts of the front cover 2 and rear cover 6 is formed with a cylindrical flange 7 projected to the outside so that the other opening side end 4 can be fitted therein. The end face of the cylindrical flange 7 is formed with a taper 7a that makes the inside edge of a cylinder acute-angled. The other of the abutting parts of the front cover 2 and rear cover 6 is formed with a flange 3 projected to the outside so that the end of the cylindrical flange 7 can abut thereon, and the end face, on which the end of the cylindrical flange 7 can abut, of the flange 3 is provided with a tapered groove 3a coinciding with the taper 7a of the cylindrical flange 7.

Description

  The present invention relates to a fan that is portable and used on a floor.

  In recent years, universal design has come to be regarded as important in home appliances. Among household appliances, electric fans are becoming more versatile in terms of ease of use, design, and functions.

  Concerning ease of use, fans having a complex shape with many opportunities to move are becoming mainstream with large handles so that even elderly people can easily carry them.

  In addition, the position where the handle is provided is rational and easy to use because it can be designed in a shape that is easy to hold and is located on the top of the product. Well common.

  The motor cover is generally formed of two members, a front cover and a rear cover, each having a bottomed cylindrical shape (hereinafter referred to as a “bottomed cylindrical shape”) that is open on one side. The motor is covered from both ends in the direction and covered with each other to cover the motor. The handle is generally provided on the front cover side that mainly supports the product load. Furthermore, the handle is provided in the vicinity of the opening end of the front cover, that is, in the vicinity of the attachment portion of the front and rear covers, so that the fingers of the hand do not hit the blade guard in order to realize ease of holding. . It is reasonable to divide the front and rear covers at the end of the handle from the viewpoint of optimizing the dividing position of the molding die.

  As described above, the handle has come to be provided at a position that is most effective in terms of both user usability and manufacturing rationality, that is, at a position near the front-rear cover attaching portion in the front cover (for example, , See Patent Document 1).

Japanese Patent Laying-Open No. 2009-36211 (FIG. 2)

  In recent years, a fan having a handle on an electric motor cover is provided with a handle in the vicinity of the front cover front and rear cover attachment portion as in Patent Document 1, so that the load of the front cover is increased by the load when the product is lifted. In the worst case, the attachment part of the front and rear covers may come off. For this reason, in the electric fan which has a handle in an electric motor cover, ensuring the intensity | strength of the attaching part of the front-and-back cover is a subject.

  In addition, even when the product falls, there is a possibility that deformation or displacement occurs in the attached portion of the front and rear covers due to an impact, and the product may come off.

  Furthermore, the front and rear covers have a bottomed cylindrical shape, and are connected to an accompanying structure such as an electric motor or a gear box (swing mechanism) at the surface portions at both ends. And since the vicinity of the attaching part where the handle is provided is away from the electric motor or the accompanying structure, it is necessary to secure the strength near the handle with the strength of the resin forming the front and rear covers.

  On the other hand, in order to ensure the strength, when the structure is mechanically fixed to an electric motor or gear box (swing mechanism) etc. in the vicinity of the attachment part of the front and rear covers, Since one side is a closed bottomed cylindrical shape, a fixing structure with a built-in object is formed on the opening side of the front and rear cover. For this reason, the mold structure becomes complicated or a complicated shape design is required, and new problems such as an increase in mold cost and component cost occur. In addition, since the assembly is fixed at the portion closed by the cover, complicated work is required and the productivity is also deteriorated.

  The present invention has been made to solve the above-described problems, and makes it possible to secure the strength of the attachment portion between the front cover and the rear cover of the motor cover provided with a handle with a simple structure. For the purpose.

  An electric fan according to the present invention includes a motor cover in which a bottomed cylindrical front cover and a rear cover are detachably coupled in a state where the opening side end portions are attached to each other, and a handle provided on the motor cover. A fan with which a front flange and a rear cover are attached to each other is formed with a cylindrical flange projecting outwardly into the other opening side end, and is formed on the end surface of the cylindrical flange. The inner edge of the cylinder has a taper with an acute angle, and the other end of the front cover and the rear cover is formed with a flange projecting outward from which the end of the cylindrical flange can abut. In addition, a taper groove that matches the taper of the cylindrical flange is provided on an end surface of the flange that can contact the end of the cylindrical flange.

In the electric fan according to the present invention, when the front cover and the rear cover are attached and joined together, the taper of the end of the cylindrical flange is fitted into the taper groove of the flange of the other cover, and this It is sandwiched and restrained between the flange of the other cover and the opening side end portion, and the abutting portion of the front cover and the rear cover is integrated. For this reason, when the product is lifted by the handle provided on the motor cover, the opening end of the cover on the side fitted in the cylindrical flange, for example, is deformed upward, that is, in the lifting direction. Even so, the cylindrical flange is also pushed upward along with it, and these are integrally deformed, so that it is possible to prevent the attachment part from being displaced or coming off.
In addition, since one cylindrical flange and the other flange of the attachment part are formed so as to protrude outward from the corresponding covers, the thickness in the direction in which the attachment part is deformed (the radial direction of the cylinder) increases. As a result, the strength can be increased with a simple structure, and the deformation itself can be kept small. In addition, since the deformation of the attachment portion is suppressed to a small level, the strength of the handle, that is, the deformation of the handle when the product is lifted by the handle can be suppressed to a small level, and complicated means such as screw fixing should be used. In addition, the strength of the handle can be secured.

It is sectional drawing which shows the structure of the whole electric motor part of the electric fan which concerns on embodiment of this invention. It is a side view which shows the whole structure of the electric fan which concerns on embodiment of this invention. It is a perspective sectional view expanding and showing an attachment part of a front cover and a back cover of an electric motor cover of an electric fan concerning an embodiment of the present invention. It is a disassembled perspective sectional view which expands and shows the attachment part of the front cover and rear cover of the electric motor cover of the electric fan which concerns on embodiment of this invention.

FIG. 1 is a cross-sectional view showing the overall configuration of an electric motor part of a fan according to an embodiment of the present invention. FIG. 2 is a side view showing the overall configuration of the electric fan according to the embodiment of the present invention.
In the electric fan 100 according to the embodiment of the present invention, as shown in FIGS. 1 and 2, an electric motor cover 20 that covers the electric motor 1 is formed by a bottomed cylindrical front cover 2 and a rear cover 6. The rear cover 6 is detachably coupled in a state where the opening side ends of the rear covers 6 are attached to each other. That is, the front cover 2 and the rear cover 6 each have a surface shape opposite to the abutting portion. On these surfaces, the front cover 2 is the motor 1 and the rear cover 6 is the gear box (swing mechanism portion). ) 8 are fixed by a front cover fixing screw 9 and a rear cover fixing screw 10, respectively. Further, the front cover 2 is provided with a handle 5, and an abutting portion between the front cover 2 and the rear cover 6 is covered with the handle 5 in a plan view. Further, a blade 12 is disposed outside (front) the surface of the front cover 2, and a protective guard 11 is provided so as to surround the blade 12.

Next, details of the abutting portion between the front cover 2 and the rear cover 6 will be described with reference to FIGS. FIG. 3 is an enlarged perspective cross-sectional view showing an attachment portion between the front cover and the rear cover of the electric motor cover of the electric fan according to the embodiment of the present invention. FIG. 4 is an exploded perspective sectional view showing, in an enlarged manner, an attachment portion between the front cover and the rear cover of the electric motor cover of the electric fan according to the embodiment of the present invention.
As shown in FIGS. 3 and 4, the opening side end 4 of the front cover 2 can be fitted into one of the abutting portions of the front cover 2 and the rear cover 6 (here, the abutting portion of the rear cover 6). A cylindrical flange 7 is formed so as to protrude outward, and a taper 7 a having an acute angle at the inner edge of the cylinder is formed on the end surface of the cylindrical flange 7. Further, a flange 3 with which the end of the cylindrical flange 7 can come into contact with the rear cover 6 of the front cover 2 is formed to protrude outward. The end of the cylindrical flange 7 of the flange 3 is formed. A taper groove 3a that matches the taper 7a of the cylindrical flange 7 is provided on the end face on which can be contacted.

  Since the electric fan 100 according to the embodiment of the present invention is configured as described above, when the front cover 2 and the rear cover 6 are combined and joined together, the end of the cylindrical flange 7 of the rear cover 6 is combined. The front taper 7a is inserted into the taper groove 3a of the flange 3 of the front cover 2 and is sandwiched and restrained between the flange 3 of the front cover 2 and the opening-side end 4 so that the front cover 2 and the rear cover 6 is integrated. For this reason, when the product is lifted by the handle 5 provided on the motor cover 20, the opening side end portion 4 of the front cover 2 fitted in the cylindrical flange 7 is lifted upward, that is, lifted by the load. Even if it is deformed in the direction, the cylindrical flange 7 is also pushed upward along with it, and these are deformed as a unit, and it is possible to prevent the attachment part from being displaced or coming off. .

  Further, one cylindrical flange 7 and the other flange 3 of the attachment portion are formed so as to protrude outward from the corresponding rear cover 6 and front cover 2, respectively, and therefore the direction in which the attachment portion is deformed (tubular) ) In the radial direction), thereby increasing the strength and suppressing the deformation itself. Further, this effect is combined with the restraining effect of the taper 7a of the cylindrical flange 7 by the taper groove 3a of the flange 3 described above to increase the strength of the handle 5 and to hold the product when the handle 5 is lifted. The deformation of the hand 5 can also be suppressed small. For this reason, it becomes possible to ensure the strength without screwing the vicinity of the handle 5 to the built-in object. Furthermore, since the cylindrical flange 7 and the flange 3 that protrude outward are covered with the handle 5 in a plan view and become inconspicuous, the strength can be ensured without impairing the design, and the degree of freedom in design Will also increase.

  In addition, when the product falls backward, an impact is generated in which the rear cover 6 is strongly pressed against the front cover 2 side, but as described above, the taper 7a at the end of the cylindrical flange 7 of the rear cover 6 is The rear cover 6 is inserted into the tapered groove 3a of the flange 3 of the front cover 2 and is sandwiched and restrained between the flange 3 of the front cover 2 and the opening side end portion 4, so that the rear cover 6 is located inside the front cover 2. The rear cover 6 is prevented from entering the front cover 2 or coming out of the front cover 2.

  A similar effect can be obtained by mechanically fixing to the electric motor 1 or the gear box (swing mechanism portion) 8 or the like housed in the vicinity of the joint portion of the front and rear covers 2 and 6. Then, as described above, it is necessary to form a fixing structure on the opening side of the bottomed cylindrical front cover 2 and rear cover 6 having a closed surface on one side. Productivity deteriorates with increased cost, complex assembly, and increased component costs. On the other hand, in the electric fan 100 according to the embodiment of the present invention, since it is configured as described above, there is no need to form a fixing structure on the opening side of the bottomed cylindrical front cover 2 and the rear cover 6, Strength can be secured after realizing the same cost and assembling performance as before.

  Here, the cylindrical flange 7 having the taper 7a at the end is disposed on the rear cover 6 side, and the flange 3 having the taper groove 3a and the opening side end 4 are disposed on the front cover 2 side as an example. However, it goes without saying that these positional relationships may be reversed.

  1 Electric motor, 2 Front cover, 3 Flange, 3a Tapered groove, 4 Open end, 5 Handle, 6 Rear cover, 7 Cylindrical flange, 7a Taper, 8 Gear box, 9 Front cover fixing screw, 10 Rear cover fixing Screw, 11 protective guard, 12 blades, 20 motor cover, 100 electric fan.

Claims (2)

An electric fan comprising: a motor cover in which a bottomed cylindrical front cover and a rear cover are detachably coupled in a state where the opening side ends of each other are attached to each other; and a handle provided on the motor cover. ,
One of the attachment portions of the front cover and the rear cover is formed with a cylindrical flange projecting outwardly into which the other opening side end portion can be fitted. A taper with sharp edges is formed,
On the other side of the abutting portion between the front cover and the rear cover, a flange that can contact the end of the cylindrical flange protrudes outward, and the end of the cylindrical flange of the flange contacts the end. The electric fan characterized by the taper groove | channel which agree | coincides with the taper of the said cylindrical flange being provided in the end surface which can contact.   The said handle is fixed to the said front cover, The attaching part of the said front cover and the said back cover is covered with the said handle in planar view. Electric fan.

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