JP2000110784A - Fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan which will not damage a finger or a fin itself in case where a finger or the like hits the fin. SOLUTION: A fan motor shaft 3 is axially supported by a central shaft secured to an external frame 9 to allow free rotation, and is driven for rotation by a built-in motor. The fan motor shaft 3 is equipped with a plurality of fins 1 and air is blown by the fins 1 rotating together with the fan motor shaft 3 in the direction shown by the arrow. Each foot of the fins 1 is equipped with a spring 2 which tilts the fin 1 in the direction shown by the arrow when a certain or greater external force is exerted on the fin 1, and returns it to the original position when the external force is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan, and more particularly to a fan motor in which a motor as a driving source and fins (blades) for blowing air are incorporated.

[0002]

2. Description of the Related Art In a conventional fan motor, fins are fixed to a fan motor shaft that is rotationally driven by the motor.

[0003]

In the conventional fan motor, since the fin and the fan motor shaft are fixed, a finger is inserted into the rotating portion of the fin by any chance during rotation of the fan motor. In such a case, there is a disadvantage that the fin is damaged or the fin is damaged.

[0004]

According to the present invention, a fin (1 in FIG. 1) is provided on an outer periphery of a fan motor shaft (3 in FIG. 1), and the fan motor shaft rotates in a first direction when blowing air. Wherein the fin is swingable about its root, and a torque means (2 in FIG. 1) for urging the fin to apply the torque in the first direction, and the fin receiving the torque by the torque means stands upright. (4, 12 in FIG. 4) when the external force against the torque by the torque means is received and the fin is tilted in a second direction opposite to the first direction. And

According to the present invention, a fin (1 in FIG. 1) is provided on the outer periphery of a fan motor shaft (3 in FIG. 1), and the fan motor shaft rotates in a first direction during blowing air. An elastic body (2 in FIG. 1) that can swing around the fin and biases the fin in the first direction, and holds the fin that has received the torque by the elastic body in an upright state; A stopper (4, 12 in FIG. 4) is provided which causes the fin to fall down in a second direction opposite to the first direction when an external force against the torque by the elastic body is received.

According to the present invention, a fin (1 in FIG. 1) is provided on the outer periphery of a fan motor shaft (3 in FIG. 1). In the fan in which the fan motor shaft rotates in a first direction at the time of blowing air, the fin is a root. A spring (2 in FIG. 1) that can swing around the fin and applies the torque in the first direction to the fin, and holds the fin that has received the torque by the spring in an upright state; And a stopper (4, 12 in FIG. 4) for tilting the fin in a second direction opposite to the first direction when receiving an external force against the torque of the fin.

According to the present invention, a fin (1 in FIG. 1) is provided on an outer periphery of a fan motor shaft (3 in FIG. 1). In the fan in which the fan motor shaft rotates in a first direction at the time of blowing air, the fin is a root. A leaf spring that is swingable around and biases the fin in the first direction, and the fin that has received the torque by the leaf spring is held in an upright state. A stopper (4, 12 in FIG. 4) is provided to cause the fins to fall in a second direction opposite to the first direction when receiving an opposing external force.

According to the present invention, a fin (1 in FIG. 1) is provided on the outer periphery of a fan motor shaft (3 in FIG. 1), and the fan motor shaft rotates in a first direction during blowing air. And a magnet that oscillates about the fin and applies a torque in the first direction to the fin, and an external force that resists the torque by the magnet by holding the fin that has received the torque by the magnet in an upright state. And a stopper (4, 12 in FIG. 4) for causing the fin to fall in a second direction opposite to the first direction when the fin is received.

The present invention relates to a fan motor shaft (3 in FIG. 1) which rotates in a first direction at the time of air blowing, and fins (FIG. 1) provided on the outer periphery of the fan motor shaft and capable of swinging around a root. 1), torque means (2 in FIG. 1) for urging the fins in the first direction, and the fins receiving the torque by the torque means are held in an upright state, and A method of using a fan, comprising: a stopper (4, 12 in FIG. 4) for tilting the fin in a second direction opposite to the first direction when subjected to an external force against torque. The magnitude of the torque of the torque means is changed according to the required blowing capacity, and when a large blowing capacity is required, the torque of the torque means is increased to keep the fins in an upright state during blowing. And small blast When a force only require, the fins when air blowing by reducing the torque of the torque means, characterized in that to fall in the second direction.

[0010]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 are a perspective view of an entire fan motor and a perspective view of a fin 1 according to an embodiment of the present invention, respectively.

The fan motor shaft 3 is rotatably supported by a center fixed shaft (not shown) fixed to the outer frame 9 and is rotationally driven by a built-in motor (not shown). A plurality of fins 1 are attached to the fan motor shaft 3, and the fins 1 rotate together with the fan motor shaft 3 in the direction of arrow 6 to blow air.

At the base of each fin 1, when an external force exceeding a certain level is applied to the fin 1 in the direction of the arrow 8, the fin 1 is caused to fall in the direction of the arrow 8, and when the external force is removed, the fin 1 returns to its original state. A spring 2 is provided which can be operated.

FIG. 3 is a view taken in the direction of the arrow A showing details of a mounting portion of the spring 2, and FIG. 4 is a side view of FIG.

A shaft 5 is fixed to a fixed fin 4 fixed to the outer peripheral surface of the fan motor shaft 3, and the fin 1 is rotatably supported on the shaft 5. The protrusions 22 provided at both ends of the coiled spring 2 provided on the shaft 5 abut against the fixed fins 4, and the protrusions 21 provided at the center of the spring 2 correspond to the fins 1.
And presses the lower part 12 against the fixed fin 4 to apply a torque to the fin 1 in the direction of arrow 7 opposite to the direction of arrow 8. The torque applied to the fin 1 by the spring 2 is set so as to be sufficiently larger than the torque applied to the fin 1 at the time of blowing air, but not larger than necessary. When a finger is mistakenly inserted into the outer frame 9 of the rotating fan motor and the finger hits the fin 1, the external force received by the fin 1 from the finger receives the fin 1 from the air during normal air blowing. The spring force of the spring 2 is set so as to be larger than the external force, and so that the fin 1 falls down greatly with the external force received when the finger hits.

Next, the operation of the fan motor according to the embodiment of the present invention will be described with reference to the drawings.

When the fan motor is stopped or when air is normally blown, the fin 1 is held in a normal upright state by the spring 2. When a finger hits the fin 1 of the fan motor, the spring 2 at the root of the fin 1 absorbs the force at the time of the collision, and the fin 1 largely falls in the direction opposite to the rotation direction (arrow 6) (arrow 8). When the external force by the finger disappears, the fin 1 can return to the normal state again by the action of the spring 2.

As described above, even if a finger or the like hits the fin 1, the fin 1 escapes, so that no injury is caused to the fingertip and the fin 1 is not damaged.

Next, a method of using a fan motor according to another embodiment of the present invention will be described with reference to the drawings.

The fan motor used in this embodiment is
The structure is the same as that shown in FIGS.
4 will be described with reference to FIG. 4). According to the required blowing capacity, the strength of the spring 2 is changed and set to reduce the blowing capacity. In addition, the spring force of the spring 2 is reduced according to the blowing capacity so that the lower the blowing capacity, the larger the angle at which the fin 1 falls.

FIG. 5 is a view showing a state of the fin 1 when a fan motor in which the spring force of the spring 2 is relatively increased in accordance with the required large air blowing capacity is rotationally driven.
Is a fan motor shaft 3 driven by a motor in an upright state.
A large wind force is generated according to the rotation of.

FIG. 6 corresponds to the fact that only a small air blowing capacity is required. In response to the fact that the fan motor using the spring 2 having a relatively weak spring force is driven to rotate, the fins 1 snap by the force of air. It is a figure showing the state where it fell in the direction of. When the fin 1 falls down, the blowing capacity is reduced.

Each of the fan motors shown in FIGS. 5 and 6 has a motor having the same capacity as a drive source and has fins 1 of the same shape. By changing only the strength of the spring 2 as described above, it is possible to make a difference in the air blowing capacity, so that parts other than the spring 2 can be shared, which contributes to an increase in the efficiency and cost of the fan motor. It has the effect of being able to.

The fan of the present invention uses a metal leaf spring or a rubber or the like having elasticity instead of the coil spring shown in FIGS. You can also. Further, a magnet may be provided on the fixed fin 4 and the lower portion 12 of the fin 1 shown in FIGS.

[0025]

According to the fan of the present invention, when the finger inserted into the rotating fan hits the fin, the fin falls down so as to be largely inclined and escapes, so that the force received by the finger is reduced, This has the effect of preventing injuries and also has the effect of preventing breakage of the fins.

Also, by changing the magnitude of the torque of the torque means, there is also an effect that the blowing capacity can be adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fan according to an embodiment of the present invention.

FIG. 2 is a perspective view of a portion of a fin 1 in FIG.

FIG. 3 is a view as viewed in the direction of the arrow A shown in FIG. 2;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a perspective view of a fin 1 for explaining a method of using a fan according to another embodiment of the present invention, in which the spring force of a spring 2 is increased.

FIG. 6 is a perspective view of a portion of a fin 1 for explaining a method of using a fan according to another embodiment of the present invention, similar to FIG. 5, in a case where the spring force of a spring 2 is reduced. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fin 12 Lower part 2 Spring 21 Projection 22 Projection 3 Fan motor shaft 4 Fixed fin 5 Axis 9 Outer frame

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[Procedure amendment]

[Submission date] July 9, 1999 (July 7, 1999)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H021 AA01 BA28 CA03 DA17 3H033 AA02 BB02 BB08 BB20 CC02 DD02 DD20 DD24 DD28 DD30 EE05 EE11 EE15 EE16 EE18 EE19 5H607 AA02 BB01 CC01 CC03 CC05 FF04 JJ08

Claims (6)

[Claims] 1. A fin is provided on an outer periphery of a fan motor shaft,
A fan in which the fan motor shaft rotates in a first direction at the time of blowing air, wherein the fin is swingable about a root thereof, and a torque means for urging the fin with a torque in the first direction; Holding the fins in an upright state, and when receiving an external force against the torque by the torque means, the fins are tilted in a second direction opposite to the first direction. A fan including a stopper. 2. A fin is provided on an outer periphery of a fan motor shaft,
An elastic body for rotating the fan motor shaft in a first direction at the time of air blowing, wherein the fin is swingable about a root thereof, and biases the fin in the first direction; Holding the fins in an upright state and receiving the external force against the torque by the elastic body, the fins are tilted in a second direction opposite to the first direction. A fan including a stopper. 3. A fin is provided on an outer periphery of a fan motor shaft,
A fan in which the fan motor shaft rotates in a first direction at the time of blowing air, wherein the fin is swingable about a root thereof, and a spring for urging the fin with a torque in the first direction; And a stopper for holding the fins in an upright state, and tilting the fins in a second direction opposite to the first direction when subjected to an external force against torque by the spring. A fan characterized by including. 4. A fin is provided on an outer periphery of a fan motor shaft,
A fan spring in which the fan motor shaft rotates in a first direction at the time of blowing air, wherein the fin is swingable about a root, and a leaf spring biases the fin in the first direction; Holding the fins in an upright state and receiving the external force against the torque of the leaf spring, the fins are tilted in a second direction opposite to the first direction. A fan including a stopper. 5. A fin is provided on an outer periphery of a fan motor shaft,
A fan in which the fan motor shaft rotates in a first direction when blowing air, wherein the fin is swingable about a root thereof, and a magnet for urging the fin to apply a torque in the first direction; And a stopper for holding the fin in an upright state and tilting the fin in a second direction opposite to the first direction when an external force against torque by the magnet is received. A fan characterized by including. 6. A fan motor shaft that rotates in a first direction at the time of air blowing, a fin provided on an outer periphery of the fan motor shaft and swingable around a root, and a fin in the first direction. A torque means for urging a torque, and the fin receiving the torque by the torque means is held in an upright state, and when an external force against the torque by the torque means is received, the fin is moved in the first direction. In a method of using a fan having a stopper for tilting in the opposite second direction, when the magnitude of the torque of the torque means is changed according to the required blowing capacity, and when a large blowing capacity is required, By increasing the torque of the torque means so that the fins are kept in an upright state at the time of blowing, and when only a small blowing capacity is required, the torque of the torque means is reduced. When blowing, the fins
How to use a fan characterized by falling down in the direction of.