JPS6253718B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to an electric fan that causes the head to vibrate and move upward and upward.

<Prior art> There have been electric fans that vibrate the head from side to side, but recently, in addition to this vibration movement from side to side, fans have also been able to perform complex three-dimensional vibration movements by vertically tilting the head up and down. An electric fan has been devised to (For example, see Utility Model Publication No. 55-92098 and Utility Model Publication No. 36-15450.) In addition to the oscillation mechanism that causes the head to vibrate from side to side, this type of electric fan also allows the head to be lifted up and down in the vertical direction. )
The device is equipped with a tilting angle adjustment mechanism, and by performing the tilting motion simultaneously with the neck vibration motion, a complex three-dimensional neck vibration motion is performed.

The elevation angle adjustment mechanism described above uses, for example, a small motor with a built-in reduction gear mechanism as its drive source, and the output shaft of this small motor is supported by a crank and a rod, and the head is supported by a spindle. It is connected to the lower end of the connecting piece.

Such an elevation angle adjustment mechanism transmits the rotational driving force of a small motor to the neck piece via the crank and rod, thereby adjusting the neck piece.
The neck piece is swung around a support shaft that is pivotally supported on a stand, and as a result, the head, which is supported by the neck piece with a spindle, moves up and down around the support shaft.

Now, in a fan equipped with such an elevation angle adjustment mechanism, when the head is moved up and down, the head is supported by the support shaft, so the eccentric torque of the center of gravity is transferred to the support shaft due to the elevation movement. It occurs around the time.

In other words, for example, if we define a case in which the head rotates downward, the center of gravity of the head moves forward from its original position, causing a force that tends to cause it to fall forward, and the force due to this movement of the center of gravity acts on the eccentric center of gravity. Torque is generated around the support shaft.

The eccentric center of gravity torque generated in this way acts as a load on the small motor that performs the elevation movement, so in order to reduce this load, an elastic member (such as a spring) that biases the head in a direction that cancels out this eccentric center of gravity torque is used. is provided in conventional electric fans.

However, in conventional electric fans, the spindle that connects the head and the neck piece is
It was installed in front of the neck piece and was located on the axis of this spindle.
Even if the head is in a horizontal state, at this time there is already a horizontal distance This torque would further increase if the was rotated forward.

Moreover, in conventional electric fans of this type, the elevation angle adjustment mechanism was provided inside the neck piece, so the neck piece itself became heavy.
The eccentric center of gravity torque applied to the shaft supporting portion of the neck piece with the stand, together with the eccentric center of gravity torque due to the position of the head, has become extremely large. For this reason, the head and the neck piece tend to fall forward with a large force, making it extremely difficult to provide firm support at the shaft support portion of the neck piece, and it is particularly difficult to perform elevation and elevation angle movements at the shaft support portion of the neck piece. It was hot.

<Means for solving the problem> An elevation angle adjustment mechanism is provided in the stand. This elevation angle adjustment mechanism includes a motor and a mechanism that converts the rotational movement of the motor into the elevational movement of the neckpiece.

On the other hand, the center of gravity of the head is placed on the axis of the spindle, and the spindle is placed at a position where the axis of the spindle is orthogonal to the axis branch line of the neck piece.

<Function> When the elevation angle adjustment mechanism moves the neck piece up and down, the head fixed to the neck piece with a spindle moves up and down. Therefore, the elevation angle of the head can be adjusted by this elevation angle adjustment mechanism. If the head vibration motion and the elevation angle motion are performed continuously, a so-called three-dimensional head vibration motion will be performed.

Since this elevation angle adjustment mechanism is placed inside the stand, the neck piece is extremely lightweight compared to those that house the mechanism in the neck piece.
Almost no eccentric center of gravity torque occurs on the shaft support portion. Furthermore, the center of gravity of the head supported by this neck piece is placed on the axis branch line of the spindle, and the axis branch line of the spindle where the center of gravity of this head is located is also the axis branch line of the neck piece to which this spindle is fixed. Since the spindle is arranged at a position perpendicular to the axis, the center of gravity of the head also coincides with a position perpendicular to the axis branch line of the neck piece. Therefore, there is no eccentric center of gravity torque due to the weight of the head around the axis branch line of the neck piece.

Therefore, the eccentric center of gravity torque generated around the shaft support portion of the neck piece when performing the above-mentioned elevation angle adjustment and three-dimensional swing motion is minimized. For this reason,
The force applied to the balance spring, which counteracts the eccentric torque of the head's center of gravity that occurs as the head moves up and down, also becomes smaller.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view of FIG.

In FIGS. 1 and 2, 1 is a stand that is hung on a wall, pillar, etc., 2 is a neck piece that is supported by the stand 1 so as to be able to move vertically (upward and downward), and 3 is a spindle 31 attached to the neck piece 2. The fan head 4 is supported so as to be rotatable left and right, and is connected to a lead wire suspended from a stand 40, and is a switch box in which switches are housed.

As shown in FIG. 3, which is a cross-sectional view taken along line A-A in FIG. There are stepped through holes 6 on both side walls of the
6 is drilled.

On the other hand, in the above-mentioned neck piece 2, a through hole 7 is drilled that passes through the vertical direction, and screw holes 8, 8 that pass through the horizontal direction are drilled, and the axis of the through hole 7 and the screw hole 8 A through hole and a screw hole 8 are formed such that the axis thereof is perpendicular to the axis of the screw hole 8 in the neck piece 2.

This neck piece 2 is placed between both walls of the neck holder part 5 and is attached to the stand 1 up and down by bolts 9, 9 inserted through through holes 6, 6 and screwed into the screw holes 8, 8. It is supported so that it can move (up and down) freely.

Further, the spindle 31 is inserted into the through hole 7, and by inserting the spindle 31 into the through hole 7, the head 3 is supported by the neck piece 2 with the spindle 31.

This head 3 has a spindle 31 fixedly attached thereto so that its center of gravity is located on the axis of the spindle 31 supporting the head 3, and the spindle 31 is inserted into the through hole 7. Network piece 2
By supporting the head 3, the center of gravity of the head is placed at a position perpendicular to the axis of the screw hole 8, and as a result, the bolt 9, which is the support shaft that pivotally supports the neck piece 2, , 9 is perpendicular to the axis.

Reference numeral 10 denotes an elevation angle adjustment mechanism provided within the stand 1 between the stand 1 and the neck piece 2.

This elevation angle adjustment mechanism 10 includes screws 13, screws 13, and bosses 11 and 12 that are integrally provided on the inner wall of the stand 1.
13, a mounting angle 14 fixed to the angle 14, an elevation angle changing motor 15 consisting of a small low-speed motor fixed to the angle 14, a crank 16 fixed to the shaft of the motor 15, and one side edge of the lower end of the neck piece 2. a tongue piece 17 provided with a protruding shaft portion 17';
The rod 18 is rotatably supported at one end by a crank 16 and at the other end by a shaft portion 17'.As shown in FIG. The neck piece 2 is reciprocated up and down by swinging.

The balance spring 19 is interposed between the stand 1 and the neck piece 2, and expands and contracts as the elevation angle of the fan head 3 changes, thereby exerting a force to counteract the eccentric center of gravity torque of the head 3. As shown in FIG. 5, the protrusions 20 integrally protrude from the stand 1, and the other ends thereof are respectively engaged with bolts 22 that penetrate through one side wall of the stand 1 and are screwed into screw holes 21 on the other inner surface. ing. Thus, the balance spring 19 keeps the load applied to the elevation angle changing motor 15 constant during the elevation angle changing operation so that the changing operation can be performed smoothly, and also allows the use of a motor with a small output as the elevation angle changing motor 15. This is what I did.

The back opening of the stand 1 is closed by a back cover 24 attached to the stand 1 with screws 23, 23. Note that 25 indicates a boss integrally provided on the inner surface of the stand 1.

The electric fan head 3 includes a fan (not shown), a fan guard 26, a fan motor 27, and a motor cover 28.
A spindle 31 is fixed to the outer peripheral surface of the fan motor 27 via a mounting angle 30. The spindle 31
is positioned so that the center of gravity of the fan head 3 is located on its axis. Therefore, the fan head 3
is supported rotatably left and right by inserting the spindle 31 into the through hole 7 of the neck piece 2,
The head oscillation mechanism 29 causes the head to oscillate from side to side around the spindle 31.

The swinging mechanism 29 includes a mounting board 32 fixed to the rear end surface of the fan motor 27, a swinging motor 33 fixed to the board 32 with its shaft facing downward, and comprising, for example, a reversible synchronous motor, and a shaft of the motor 33. A crank 34 fixed to the neck piece 2, a boss 35 integrally protruding from the upper surface of the neck piece 2, and one end attached to the crank 34.
and a rod 36 whose other end is rotatably supported on a boss 35. The rod 36 is oscillated by a oscillation motor 33, and the oscillation causes the fan head 3 to vibrate from side to side. .

The switch box 4 houses an air volume adjustment switch 37 that sets the rotation speed of the fan motor 27, an elevation angle change switch 38 that controls the operation of the elevation angle change motor 15, and a swing switch 39 that controls the operation of the swing motor 33. These switches 3
7, 38, 39 and each motor 27, 15, 33, etc., are suspended below the stand 1 with lead wires 40 that electrically connect them.

In a wall-mounted electric fan configured as described above, if the stand 1 is hung on a high place such as a wall or a pillar, and the switch box 4 is suspended and supported in a low place, the air volume can be adjusted, the elevation angle can be changed, and the neck can be easily adjusted. Switches 37, 38, 39 in switch box 4 with vibration operation nearby
The electric fan can be controlled by operation, is easy to operate, and by significantly improving the operability, each function of the electric fan can be fully demonstrated and can be used effectively.

That is, by operating the air volume adjustment switch 37, for example, a switch terminal for speed adjustment of the fan motor is switched to control the speed of the fan motor, thereby controlling the air volume blown by the fan. or,
By operating the elevation angle changing switch 38, the elevation angle changing motor 15 is driven. As a result, the rotational motion of the motor 15 is converted into a swinging motion (upward and downward movement) of the neck piece 2, and the swinging motion (upward movement) of the neckpiece 2 causes the head 3 to rise and fall (up and down). In this way, the elevation (up, down) angle adjustment of the head 3 is performed. Further, the swing motor 33 is driven by operating the swing switch 39. As a result, the rotational motion of the swinging motor 33 is converted into a swinging (left-right) motion of the head by a well-known swinging mechanism, and the left-right direction of the head is adjusted.

Now, by adjusting the elevation angle at the same time as the neck vibration motion, the electric fan can perform a three-dimensional motion by adding vertical motion to the left and right motion.

In the electric fan having the above configuration, the center of gravity of the head 3 is on the axis of the spindle 31, and the axis of the spindle 31 is inserted into the screw hole 8, which is the vertical rotation center of the head. Since it is perpendicular to the axes of the bolts 9, 9, when the head 3 is in a horizontal position as shown in Figure 1, the rotational moment around the axis of the bolt 9 is 0, and no eccentric center of gravity torque occurs. Even when the neck piece 2 and the head 3 are rotated downward by the motor 15, the eccentric torque around the shaft is considerably smaller than that of the conventional one, and as a result, the motor 1
As the load applied to the balance spring 5 becomes smaller and the eccentric center of gravity torque to be canceled becomes smaller, a balance spring 19 with a small spring force becomes sufficient.

Therefore, since a smaller motor with low torque can be used as the motor 15, the spring 1
Together with the miniaturization of the mechanism 9, the elevation angle adjustment mechanism 10 itself can be made small, and the stand 1 that houses this mechanism 10 and, by extension, the electric fan can be made small.

It goes without saying that the present invention is not limited to wall-mounted fans, but can also be applied to tabletop fans, fans with elevating supports, and the like. Further, the elevation angle adjusting mechanism 10 is not limited to the configuration of the embodiment, but can be adjusted as the elevation angle changing motor 15 rotates by combining the elevation angle changing motor 15 and a mechanism that converts rotational motion into reciprocating motion. Any device that allows the neck piece 2 to be rotated up and down will suffice. Further, the swinging mechanism 29 may use the fan motor 27 as a driving source.

<Effects> According to the present invention, in a device equipped with an elevation angle adjustment mechanism using a swinging mechanism and a motor as a driving source, the elevation angle adjustment means is provided in the stand, and the head on the axis of the spindle is provided. The center of gravity of the neck piece is located, and the axis of the spindle is placed on the axial branch line of the neck piece, so the rotational moment at the axial branch line of the neck piece, that is, the eccentric center of gravity torque, can be reduced without having to take the trouble of installing a balance weight on the head. It is possible to create a state of 0.

Therefore, because the conventional device has an elevation angle adjustment mechanism in the neck piece and the center of gravity of the head and the neck piece is located far forward of the neck piece's axis support, there is a very large amount of space around the neck piece's axis support. In contrast to the case where eccentric center of gravity torque was generated, in the electric fan of the present invention, the eccentric center of gravity torque is almost zero, so that the elevation angle of the head can be easily adjusted with a small force. In other words, if the eccentric torque around the support axis of the neck piece is large,
The force alone to support the head and neck piece is quite large, so a device with a large ability to maintain the elevation angle is required.In particular, when adjusting the head upward, it is necessary to overcome the eccentric center of gravity torque and direct it further upward. Therefore, a very large force is required, but if the eccentric torque of the center of gravity is 0 as in the present invention, the elevation angle can be maintained with a simple device and the elevation angle can be adjusted with a light operating force. In the case of the present invention, since the head is tilted by an elevation angle adjustment mechanism that is provided in the stand and consists of a motor and a conversion mechanism, the force applied to the mechanism is also reduced, so the elevation angle is adjusted using the motor as the drive source. In this case, the load applied to the motor that drives the neck piece is reduced compared to conventional ones, making it possible to use a smaller, lower-torque motor, and to reduce the unbalanced weight that occurs when adjusting the elevation angle. Since the center torque is also reduced, the spring force of the elastic member can be small due to the reduction of the eccentric center of gravity torque to be canceled, and a small and lightweight elastic member can be used.

Furthermore, by making the motor and the elastic member smaller and lighter, the storage space for the motor and the elastic member can be reduced, thereby making it possible to downsize the electric fan.

Furthermore, by reducing the load on the motor and the elastic member, it is possible to extend the life of the motor and the elastic member, and it is possible to reduce the risk of deformation of the supporting portions of the motor and the elastic member.

Further, since the spring force of the elastic member is reduced, it is possible to easily attach the elastic member, which is extremely difficult to assemble the electric fan.

[Brief explanation of the drawing]

Fig. 1 is an external side view of the electric fan of the present invention, Fig. 2 is a side sectional view of the essential parts of the same, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is an explanatory diagram of the operation of the elevation angle changing mechanism. , FIG. 5 is an explanatory view of the structure of the retaining structure of the balance spring, and FIG. 6 is an explanatory view of the structure of the head of the electric fan. 1: Stand, 2: Network piece, 3: Fan head, 10: Elevation angle adjustment mechanism, 15: Elevation angle changing motor, 27: Fan motor, 29: Swing mechanism, 31: Spindle.

Claims (1)

[Scope of Claims] 1. A fan head equipped with a fan and a fan motor; a neck piece that supports this head with a spindle; a stand that axially supports the neck piece to which this head is attached so that it can be raised and lowered; A tilting angle adjustment device that includes a swinging mechanism that causes the head to vibrate around a spindle, a motor and a mechanism that converts the rotational motion of the motor into a tilting motion of the neckpiece, which is placed within the stand. and a balance spring that cancels out the eccentric torque of the center of gravity of the head that occurs as the head moves up and down. An electric fan characterized by having a spindle placed perpendicular to the branch line.