Actuator for shutter

Abstract

The present invention provides a shutter opening and closing device which has a function of maintaining the shutter in an open state and a closed state, can save space, and can appropriately perform the shutter opening and closing operation by grasping the position of the shutter. It comprises: a shutter (18), which can be opened and closed on the opening (21) of the frame body (20), and uses its own weight to exert force in the closing direction; a deceleration mechanism (5) makes the shutter (18) overcome its own weight to operate The output of the stepping motor (4) for opening and closing operation is decelerated and transmitted to the shutter (18); and the one-way clutch (24), the shutter (18) is driven in the closing direction, and will finally abut against the opening (21). The closed position on the end face of ) serves as a blocking portion that blocks the shutter (18) from moving, and when the shutter (18) is blocked from moving by the blocking portion, the one-way clutch (24) cuts off the connection to the shutter (18).

Description

(1) Technical field [0001] The invention relates to a ventilating fan used for exchanging indoor air to keep the indoor air fresh, in particular to an opening and closing device of a louver of the ventilating fan. (2) Background technology [0002] The ventilating fan has a louver which opens the opening only when blowing and discharging the indoor air, and closes the opening at other times. There are many kinds proposed in the prior art about the opening and closing mechanism of this shutter (for example, patent document 1). [0003] In the opening and closing device for the shutter of a ventilation fan described in Patent Document 1, a reduction gear mechanism is provided between a motor shaft as a driving source and a drive shaft for driving the shutter, and a driving side and a driven side are arranged in the reduction gear mechanism. A side-connecting or disconnecting clutch is provided with a solenoid for actuating the clutch. And, when the switch of the ventilating ...

AI Technical Summary

Problems solved by technology

[0005] However, in the opening and closing device for the ventilator shutter described in the above-mentioned patent document, the number of parts increases due to the use of a solenoid, and a space for arranging the solenoid is required, resulting in a problem of increasing the size of the device.

In addition, in order to maintain the open state of the shutter, it is necessary to continuously energize the solenoid to maintain the connection of the clutch, and there is a problem of large power consumption.

Furthermore, there is a problem that a knocking sound caused by the plunger is generated when the solenoid is energized and when the energization is stopped.

There is also the problem of increasing the number of parts due to the use of a spring for keeping the shutter in the closed position

In addition, when the shutter is closed, it is necessary to have a brake device for slowing down the closing speed of the shutter against the self-weight of the shutter and the force of the spring, resulting in an increase in the number of parts. Space, there is a problem of increasing the size of the device

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