JPS598726B2 - Kankisen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to simplify the structure of a ventilation fan that opens and closes a shutter by a fan motor.

As a method of automatically opening the shutter when the ventilation fan is operating,
There are methods that use the wind pressure of a fan, or methods that use a small motor that is different from a fan motor, but methods that use wind pressure to open the shirt door are difficult to open if the shirt door is dirty with oil and dust, etc. The method of using a small motor has the disadvantage of high cost.

In order to solve this problem, there are some devices that use a fan motor to wind up the drawstring for opening and closing the shirtter to open the shirtter, but when the shirtter is fully opened, the connection between the fan motor and the drawstring needs to be broken and the drawstring needs to be fixed at the same time. This had the disadvantage that the clutch mechanism and gear mechanism were extremely complicated.

In the present invention, the fan is rotated by a motor whose rotor and stator rotate together, and the shirt starter is opened at the same time, and there is no need to interrupt the connection between the motor and the shirt starter even when the shirt starter is fully opened. The structure is simplified.

The present invention will be described below with reference to the drawings. Reference numeral 1 denotes a ventilation fan, which faces the indoor opening and is equipped with a fan motor 3 for driving the ventilation fan 2, and which faces the outdoor opening and is equipped with a fan motor 3 for driving the ventilation fan 2. It is equipped with

Reference numeral 5 denotes an interlocking plate connecting each shirt stopper, and the interlocking plate is pulled up by a tension spring 6 to hold the above-mentioned shirt stops 4, 4, 4 in a closed state.
This interlocking plate 5 is connected to the fan motor 3 via.

This fan motor 3 is attached to a metal rear bracket 10 fixed to the ventilation fan main body 1 via support legs 9, 9.
A cylindrical portion 11 is integrally protruded from the cylindrical portion, and a metal rod 12 is press-fitted into the cylindrical portion to form a central fixed shaft 13.

Reference numeral 14 denotes a front bracket of the motor, which has a bifurcated inner peripheral edge to house an oil-impregnated felt 15, and a bearing metal 16.
This bearing metal is rotatably fitted onto the metal rod 12, and is prevented from moving forward and backward by washers 11 and 17.

Then, the outer rotor 18 of the motor is press-fitted into this front bracket 14, and this outer rotor is attached to the central fixed shaft 13.
The boss portion 19 of the blower fan 2 is crimped onto the front bracket 14 so that the blower fan 2 is rotated by the rotation of the outer rotor 18.

Reference numeral 20 denotes an inner stator having a winding 21, which is rotatably attached to the cylindrical portion 11 via a bearing metal 22 press-fitted into the iron core.

23 is a cylindrical gear attached to the inner stator 20;
@24 carved on the opening periphery of the cylindrical gear is meshed with the first reduction gear 25, the second reduction gear 26 meshed with the first reduction gear 25 winds up the drawstring 8, and the interlocking plate 5 is lowered. The shirt cap 4 is opened by pulling it.

A slip ring 27.27 for power reception is provided inside the cylindrical gear 23, and contacts 29, 29 are protruded from the terminal board 28 fixed to the cylindrical portion 11 to connect the slip ring 27.27. 27K sliding contact is made, and power is supplied to the winding 21 of the inner stator.

30 is a lead set pulled out from the terminal board 28.

On the other hand, the first and second deceleration trucks 25 and 26 are rotatably attached to the support plates 31 and 31Vc attached to the rear bracket 10.

Among them, the first deceleration truck 25 in particular is attached so as to be slidable in its axial direction, and is normally moved upward by a compression spring 32 and disengaged from the cylindrical gear 23. , when the member 34 is attracted by the rich magnet 33 which is energized at the same time as power is supplied to the winding 21, the lever 34 pushes down and moves downward to engage with the cylindrical gear 23. There is.

In the above configuration, from the lead wire 30 to the contact point 29 of the terminal board
When alternating current is supplied to the winding 21 through the slip ring 27, a rotating magnetic field is generated, the outer rotor 18 rotates, and the blower fan 2 is rotated.

However, since the inner stator 20 is also rotatably attached to the central fixed shaft 13K, the inner stator 20 rotates in the opposite direction to the outer rotor 18.

On the other hand, since the electromagnet 33 is also energized at the same time as the power is supplied to the wire 21, the lever 34 is attracted, and the first reduction gear 25 is pushed down against the spring 32Vc, so that the cylindrical gear 23
K meshes.

Therefore, 200 rotations of the inner stator are transmitted to the first reduction gear 25K via the cylindrical gear 23, and further to the second reduction gear 25K.
6, the drawstring 8 is wound up, the interlocking plate 5 is pulled down, and the shirt ties 4, 4.4 are released.

When the drawstring 8 is pulled until the shirt is fully open,
The stopper 35 attached to the drawstring hits the end of the tube 36 protecting the drawstring 8 and prevents the drawstring 8 from moving any further, so that the inner stator 20 is held in a locked state.

Therefore, in this state, only the outer rotor 18 rotates at a high speed, and indoor air is discharged.

When the power supply to the winding 21 is stopped in order to stop the ventilation operation, the blower fan 2 is stopped.

At this time, the power supply to the electromagnet 33 is also stopped, so the lever 3
4 moves upward by its own elasticity, and the first reduction gear 25
is pulled upward to disengage the gear and the cylindrical gear 23.

Therefore, there is no longer any force holding the drawstring 8 in the wound state, and the tension spring 6 pulls up the interlocking plate 5, closing the shirt flaps 4, 4.4.

FIG. 3 shows another embodiment, in which the second reduction gear 26 is omitted and the mechanism for disengaging the first reduction @ table 25 and the cylindrical gear 23 is omitted.

In this embodiment, since the reduction ratio is small, as long as the current to the winding 21 is cut off, the pull string 8 can be pulled back by the tension spring 6 without disengaging the cylindrical gear 23 and the first reduction gear 26. The shutters 4, 4.4 can be closed.

As described above, the present invention enables not only the rotor of the motor but also the stator having windings to rotate, and the rotational force of the stator to wind the drawstring connected to the shirt starter via the interlocking plate. Since there are no connections, a single fan motor can rotate the ventilation fan and open and close the shutter, which is economical.

Moreover, since the drawstring is wound to open and close the shirt, it requires less torque than those that operate via a rod, allowing for a smaller motor, and because the drawstring can be easily deformed, there are restrictions on the location of the motor. The design and manufacturing process can be simplified because there are fewer defects and strict dimensional accuracy is not required.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the ventilation fan of the present invention, FIG. 2 is a longitudinal sectional view of the fan motor, and FIG. 3 is a longitudinal sectional view of main parts showing another embodiment. 18...Outer rotor, 21...Winding,
20...Inner stator, 13...Center fixed shaft, 2...Blower fan, 4...Shaft star.

Claims (1)

[Claims] 1. A rotor and a stator of the motor are rotatably supported by the main body, and a drawstring connected to the shirt starter via an interlocking plate is arranged in a winding relationship by the rotational force of the stator. ventilation fan.