JP5099600B2 - Blower - Google Patents

Description

  The present invention relates to a blower provided with a drive unit that drives a blower, and more particularly to a blower such as a fan having a handle that can be held by hand during transportation.

  Conventionally, a fan, which is a type of blower, has been used for the purpose of obtaining a cool feeling when the temperature is high and the heat is felt like in summer. However, in recent years, it has been used for the purpose of circulating room air. For example, when using air-conditioning equipment such as an air conditioner, the room temperature may vary depending on the shape and size of the room, but if the air in the room is circulated with a fan, the room temperature can be made uniform. it can. Thus, since it is used also as an air circulator regardless of summer and winter, the use period of the electric fan is longer than before.

A conventional electric fan is disclosed in Patent Document 1. FIG. 4 shows a part of such a conventional electric fan. In the figure, reference numeral 21 denotes a blower constituting the main part of the electric fan. Reference numeral 1 denotes a blade formed of a thermoplastic resin such as plastic, for example, and is covered with a guard portion 2 in which linear members are connected in a hook shape. Reference numeral 3 denotes a motor as a drive unit that rotationally drives the blade 1, and is covered with an outer member 10 formed by a back plate 4 and a rear case 5 constituting the guard unit 2. Reference numeral 6 denotes a handle portion in which a similar linear member is attached to the guard portion 2 made of a linear member covering the blade 1 by spot welding or the like. When carrying the electric fan main body, it is lifted by putting a finger on the handle portion 6 and applying a force.
JP 2001-12382 A

  However, in the conventional electric fan, when carrying the electric fan main body, the handle portion 6 is hung with a finger and lifted, but the handle portion 6 is formed of a linear member that can only be a finger hook, so it bites into the finger, There was a problem that portability was bad, such as becoming unstable during transportation.

  In view of the above problems, an object of the present invention is to provide a blower that does not shake like a pendulum when a handle is gripped and lifted.

According to claim 1 of the present invention, in a blower device including a blower unit, a drive unit that drives the blower unit, a member that covers the drive unit, and a handle unit, the handle unit is a predetermined part of the member. The driving part is fixed to the upper part of the member from the inside by a fixing tool, and the predetermined part and the upper part of the member are substantially collinear with the gravity vector acting on the center of gravity of the blower .

  Since the present invention is as described above, the following effects can be obtained.

  According to the air blower of claim 1 of the present invention, when the handle portion is gripped and lifted, a lifting force substantially opposite to the gravity vector acts on the gravity center of the air blower, and the gravity center is substantially linear. Because it will exercise, it will not shake like a pendulum.

Furthermore, by fixing the member and the drive unit, it is possible to eliminate the concern that the member will be deformed when a large force acts on the handle portion when lifting the blower. Further, a member and the drive unit, by fixing at the top of the member comprising a vector and substantially collinear gravity acting on the center of gravity of the blower, forces acting on the fastener is the gravitational vector direction, the fastener is bent And other problems can be prevented.

Furthermore, by fixing the member and the drive unit inside the member with the fixing tool, stress concentration can be made difficult to occur at the portion that contacts the edge of the fixing tool of the member.

  Hereinafter, preferred embodiments of a fan as a blower in the present invention will be described with reference to the accompanying drawings. In the embodiment, the same parts as those in the conventional example are denoted by the same reference numerals, and the description of the common parts will be omitted as much as possible.

  FIG. 1 is a vertical cross-sectional view of a main part viewed from the right side of the electric fan in the present embodiment. In the figure, reference numeral 20 denotes an electric fan main body as a main body of a blower device, which includes a blower 21, a motor support 22 that swingably supports the blower 21, and a pole having the motor support 22 attached to the upper part. 23, a support column 24 that holds the pole 23 together with the blower 21 and the motor support 22 so as to be movable up and down, and a base unit 25 that holds the support column 24 upright. The pole 23 may not be movable but may be fixed, and the column portion 24 may be integrated with the base portion 25. An operation unit 26 is provided in front of the upper surface of the base unit 25, and the start and end of blowing and the strength of blowing are performed by pushing or rotating a switch (not shown) provided on the operation unit 26. Adjustments can be made.

  Hereinafter, details of the blower 21 will be described. In FIG. 2, 1 is a blade | wing as a ventilation part formed with the thermoplastic resin, and is covered with the guard part 2 which connected the linear member in hook shape. The guard portion 2 is configured by a rear guard 2A having a back plate 4 attached to the central portion, and a front guard 2B provided in front of the rear guard 2A. Reference numeral 3 denotes a motor as a drive unit that rotationally drives the blade 1, and the blade 1 is attached and fixed to a rotating shaft 3 </ b> A protruding from the front side of the motor 3. Reference numeral 15 denotes a swing mechanism unit including a mechanism for swinging the blower 21 in a swing state. Both the motor 3 and the swing mechanism portion 15 are covered with an outer member 10 formed by the front case 30 and the rear case 5. The front case 30 and the rear case 5 constituting the outer member 10 are both made of thermoplastic resin, but the front case 30 serving as a motor case has the motor 3 housed in a recess 31 that opens rearward. The guard portion 2 is attached and fixed to the front case 30 by screwing a cap 32 onto the front portion of the motor 3 protruding from the rotating shaft 3a with the back plate 4 being sandwiched. Further, the cup-like rear case 5 that fits in the rear opening of the front case 30 has the swing mechanism portion 15 housed and fixed therein. As will be described later, the front case 30 and the motor 3 are fixed from the upper inner side of the front case 30 by a fixing tool 35 such as a screw. The guard part 2 and the outer member 10 are connected as described above.

  Reference numeral 6 denotes a grip portion for applying a force to lift the electric fan body 20 and supporting the grip portion 6a and the grip portion 6a for gripping by hand during transportation as shown in FIGS. And a support connecting portion 6b connected to the side peripheral surface of the front case 30. Of course, the handle portion 6 may be formed integrally with the front case 30. The grip portion 6a and thus the handle portion 6 are formed wide and wide enough to be gripped with a hand so as to be stable when transported, and are located at the upper portion of the front case 30. Preferably, as in this embodiment, the position of the handle portion 6 should be substantially collinear with the gravity vector 40 acting on the center of gravity of the electric fan body 20 as will be described later. It is preferable that an arbitrary distance is separated from the rear guard 2a and the outer member 10 constituting the back surface of the guard portion 2 so as not to become an obstacle when inserting and gripping. Furthermore, in order to make it easy to hold the handle portion 6, it is preferable that the surface of the grip portion 6 is a smooth curved surface in accordance with the shape when the hand is held.

  On the inner wall surface of the front case 30, a step portion 33 is provided that contacts a flange 3 b formed on the outer periphery of the motor 3. The step portion 33 is provided with a screw hole (not shown) into which the fixing tool 35 can be screwed, and the motor 3 is fixed with screws with the flange 3 abutting against the step portion 33.

  Next, the effect | action of a present Example is demonstrated with a manufacturing method.

  The blade 1 is manufactured by molding a thermoplastic resin such as plastic into a predetermined blade shape. At that time, an antistatic resin such as a styrene resin as an antistatic body is mixed with the resin material forming the blades. By mixing the antistatic resin, the blade 1 having antistatic properties is formed. Antistatic materials such as olefin resins, polyester resins, polycarbonate resins, polyamide resins, and other antistatic materials such as nonionic polymers, anionic polymers, cationic polymers, and surfactants. There is an agent. Since such an antistatic body can obtain an antistatic effect by adding a small amount, the influence on the base material on which the blade 1 is formed and the influence on the moldability are small.

  The electric fan main body 20 starts operation in accordance with the operation of the operation unit 26 provided in the base unit 25 and rotates the blade 1 by the driving force of the motor 3. When the blades 1 are rotated, air is sucked from the back surface of the guard part 2, and air is exhausted from the front surface of the guard part 2. Then, air is blown from the front of the air blower 21. At this time, dust floating in the air is also sucked into the guard portion 2 together with the air. However, since the blade 1 has antistatic properties as described above, static electricity is generated on the blade surface due to rotational friction and the like. Can be prevented, and dust adhesion can be significantly reduced.

  As described above, the handle portion 6 includes the grip portion 6 a and the support connection portion 6 b connected to the side peripheral surface of the front case 30. When the electric fan main body 20 is transported, it is possible to transport the base 25 by leaving the mounting surface by grasping the grip portion 6a of the handle portion 6 with a hand and lifting it with a force against gravity. Become. At that time, a force (hereinafter referred to as a reaction force) having the same magnitude as the force lifted from the grip portion 6a is applied to the lifting hand (finger) according to the law of action and reaction. Therefore, when the grip portion 6a is formed of a linear member as in the conventional example, the reaction force is concentrated on the portion where the finger and the grip portion 6a abut, and the grip portion 6a bites into the finger. . However, since the grip portion 6a in the present embodiment is wide enough to be gripped by the hand, the lifting force is distributed over the entire bottom surface of the grip portion 6a when the electric fan body 20 is lifted. It will be received. Naturally, since the reaction force is also dispersed, the grip portion 6a does not bite into the finger. Further, since the gripping portion 6 is provided not in the guard portion 2 but in the front case 30, the guard portion 2 does not get in the way when the hand is inserted into the gripping portion 6 and the grip portion 6a has another shape. Since the grip portion 6a can be firmly gripped by the hand, the gripping force by the hand is distributed and acts on the entire grip portion 6a. Therefore, the gripping force becomes a binding force, and shaking during transportation can be reduced.

  Here, assuming that the center of gravity of the electric fan body 20 is a point G, the grip 6a and the handle 6 are located above the front cover 30 that is substantially collinear with the gravity vector 40 acting on the gravity center G of the electric fan body 20. Note that there is. The center of gravity G varies depending on the weight and mounting state of the constituent members of the electric fan body 20. When lifting in the same manner as described above, the lifting force acting in a substantially opposite direction to the gravity vector 40 acts on the center of gravity G of the electric fan body 20, and the center of gravity G moves substantially linearly. It does not shake like.

  By the way, when raising the electric fan main body 20, there exists a concern that the front case 30 will deform | transform because a big force acts on the support connection part 6b of the handle part 6. FIG. However, in this embodiment, the above-mentioned concern is eliminated by fixing the front case 30 and the heavy motor 3 from the upper inner side of the front case 30 by the fixing tool 35. That is, the front case 30 is not deformed because a force that resists the deformation force (the force necessary to be deformed) accompanying lifting is exerted from the fixing tool 35 and the motor 3. However, if the fixing is performed from the outside of the front case 30 with a fixing tool, for example, stress concentration may occur at a portion that contacts the edge of the fixing tool such as a screw head, and the front case 30 may be damaged. It is preferable to be fixed in the vicinity of the front case 30 that is located in the vicinity and is less likely to cause stress concentration. Further, when a fixing tool is provided on the front surface of the front case 30, stress concentration occurs at the corner where the front surface of the front case 30 and the side peripheral surface are connected, and the front case 30 may be damaged. For this reason, it is preferable that the front case 30 is fixed on the side peripheral surface in the vicinity of the connecting portion between the handle portion 6 on which the deformation force acts. In particular, as in the fixing tool 35 of the present embodiment, when the fixing is performed on the upper part of the side peripheral surface of the front cover 30 that is substantially collinear with the gravity vector 40 acting on the center of gravity G of the electric fan body 20, the force acting on the fixing tool 35 It is possible to prevent problems such as bending of the fixing tool 35 due to the gravity vector direction.

  As described above, in this embodiment, in the air blower including the blade 1 as the air blowing unit and the motor 3 as the driving unit that rotationally drives the blade 1, the blade 1 is made of a material to which an antistatic body is added. Forming.

  In this case, the blade 1 can be prevented from being charged by forming the blade 1 from the material to which the antistatic body is added, so that generation of static electricity on the surface of the blade 1 due to rotational friction or the like is prevented. Therefore, even if it is used for a long period of time, it is difficult for dust to adhere to it, and it becomes possible to reduce labor for cleaning the blades. In addition, since the effect of the antistatic body can be obtained by adding a small amount, it is possible to easily obtain the blade 1 having antistatic properties without worrying about the material and formability of the group forming the blade 1. .

  Further, in this embodiment, the blade 1 as a blower, the motor 3 as a driving unit that rotationally drives the blade 1, the outer member 10 that is a member that covers the motor 3, and the electric fan main body 20 that is a main body are conveyed. In the electric fan provided with the handle portion 6 on which the force acts, the handle portion 6 is provided on the outer member 10 and has, for example, a wide shape capable of lifting the electric fan main body 20 without being hooked, and the outer member. 10 is provided with a fixture 35 which is a fixed portion to the motor 3.

  If it does in this way, the force which acts at the time of conveyance can be disperse | distributed by making it the member of the width | variety shape which a finger | toe does not dig into when the handle part 6 is not a linear member but is held by hand. . In other words, by dispersing the lifting force, it is possible to suppress biting into the finger, and by dispersing the gripping force, it is possible to reduce and stabilize shaking during transportation, thereby improving portability. Is possible. Further, by fixing to the motor 3 inside the front case 30 constituting the outer member 10, the front case 30 constituting the outer member 10 can be prevented from being deformed or damaged due to stress concentration.

  Furthermore, in the present embodiment, the handle portion 6 is separated from the rear guard 2a constituting the back surface of the guard portion 2 and the outer member 10 so as not to become an obstacle when grasping.

  If it does in this way, since the finger | toe does not hit the back guard 2a and the outer shell member 10, it can make the handle part 6 easy to grasp.

  In the present embodiment, the handle portion 6 is positioned at an upper portion of the front cover 30 that is substantially collinear with the gravity vector 40 acting on the center of gravity G of the electric fan body 20.

  In this way, when the grip portion 6a of the handle portion 6 is gripped and lifted by hand, the lifting force in the direction substantially opposite to the gravity vector acts on the gravity center G of the electric fan body 20, and the gravity center G is approximately Because it moves linearly, it does not shake like a pendulum.

  Further, in this embodiment, the predetermined portion of the front cover 30 that is substantially collinear with the gravity vector 40 acting on the center of gravity G of the electric fan body 20 and the motor 3 with the side peripheral surface of the front case 30 constituting the outer member 10. It is fixed from the inside by the fixing tool 35 at the upper part of the peripheral side surface.

  In this way, it is possible to prevent problems such as bending of the fixing tool 35 due to the force acting on the fixing tool 35 being in the direction of the gravity vector.

  In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention. The electric fan main body 20 may be configured by only the air blower 21. Further, the outer member 10 is not limited to a cylindrical shape, and may be a prismatic shape or the like.

It is a principal part longitudinal cross-sectional view of the electric fan in one Example of this invention. It is a principal part longitudinal cross-sectional view of the air blower of a fan same as the above. It is a right side view of the air blower of a fan same as the above. It is a right view of the air blower of the electric fan in a prior art example.

1 blade (air blower)
3 Motor (drive unit)
6 Handle part
10 Outer shell member
20 Fan body (blower)
35 Fastener (fixed part)

Claims (1)

In the air blower including the air blowing unit, the driving unit that drives the air blowing unit, the member that covers the driving unit, and the handle unit,
The grip portion is provided at a predetermined portion of the member, the driving portion is fixed to the upper portion of the member from the inside by a fixing tool, and the predetermined portion and the upper portion of the member are gravity acting on the center of gravity of the blower. blower, characterized in that in the vector and substantially collinear.

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