JPS6259322A - Ventilating fan - Google Patents

Abstract

PURPOSE:To provide a ventilating fan which has a simple and small sized open and close mechanism for a shutter and is trouble-free, thin type, and stable in quality by installing a connecting rod connecting shutter plates, a lock plate joined to this rod, a Y-shape cam releasing locking, and a displacement member swinging this Y- shape cam. CONSTITUTION:When electricity flows in cords 13, a heater 11 is heated and a pipe 10 comes to high temp. and a shape memory alloy 12 placed in the pipe 10 shrinks, pulls a Y-shape cam toward itself, and pushes a projection 4a upward; then, a locking part 4b is released from a lock pin 5 to release locking. By winding pressure of a ventilating fan starting rotation at the same time, shutter plates 2 are opened so as to make support points 8 as rotation centers and at that opened condition of the shutter plates 2 a shutter mechanism is locked after the lock-pin slips into the lock part 4b. Then, when the power source of the ventilating fan is cut off, the Y-shape cam 6 is inversely rotated by the spring action of the shape remembering alloy compared to rotation at the conduction and as a result, the projection 4b of the lock plate 4 is raised up to release locking and under decreased wind pressure of the ventilating fan the shutter plates 2 are quietly closed so as to make support points 8 as rotating centers.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ventilation fan that ventilates dirty indoor air and freshens the indoor air.

BACKGROUND OF THE INVENTION Conventionally, there has been a demand for an electric ventilation fan that is mounted on a wall and that uses a switch to turn on and off the power, stop the electric motor, and open and close a shutter. For this reason, conventional ventilation fans have configurations as shown in FIGS. 3 and 4, for example. That is, the shutter plate 102 is attached to the ventilation fan main body 1o1 by a fulcrum pin 103 that serves as a fulcrum for opening and closing, and the connecting rod 104 and the shutter plate 102 are connected by a connecting pin 105 so that the three shutter plates 102 move in a series. , connecting rod 10
4 is connected to a solenoid 109 having a latch 108 which can be connected to and connected to the clutch A 107, and a limit switch 110 which is connected and disconnected by the projection 107a on the clutch A. The wire 111 wound around the hoisting motor 106 is connected to the hoisting motor 10
6 is energized, the wire 111 is wound up, the connecting rod 1104 is pulled down, and the shutter 102 is changed from the closed state to the open state. At this time, the protrusion 10 on the clutch A107
7a turns on limit switch 110, energizes solenoid 109, and clutch AI07 and clutch B1.
08 and keep the shutter 102 open,
The hoisting motor 106 is de-energized. Then, when the solenoids 109 and 106 are de-energized, the return spring 1
12 and the shutter 102 were brought into a closed state by their own weight.

(For example, Japanese Utility Model Publication No. 57-112621) Problems to be Solved by the Invention However, in the electric ventilation fan configured as described above, the hoisting motor 106. IJ Mituto Switch 110 Clutch A
107, clutch 1o8. Since it includes the solenoid 109, it cannot be made smaller, and this has been an obstacle when trying to make the ventilation fan thinner.

Further, as mentioned above, the complicated mechanism causes a problem of failure.

The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to simplify and downsize the shutter opening/closing mechanism, and at the same time, provide a thin, stable-quality ventilation fan that is less likely to malfunction.

Means for Solving the Problem In order to solve this problem, the present invention provides a plurality of shutter plates rotatably disposed in the opening of a ventilation fan main body having an opening in the front and back direction, and A connecting rod that connects the shutter plate, a lock plate that has two protrusions at both ends of an L-shaped hole that is rotatably connected, and a lock plate that is rotatably attached to the main body within this L-shaped hole. lock pin and 2
Y where the legs of the book rotate and alternately contact the two actual notes.
It is provided with a Y-shaped cam and a displacement body connected to this Y-shaped cam.

With this configuration, when the heater connected to the power supply in parallel with the motor is energized, the displacement body contracts and the Y-shaped cam pushes up the lock plate to release the lock, and at the same time, the wind pressure causes the shutter to open. It becomes locked again. When the power is turned off, the Y-shaped cam pushes up the lock plate due to the spring action of the displacement body and releases the lock, and the shutter closes quietly due to the attenuation of wind pressure and is locked in the closed state.

EXAMPLE Below, one embodiment of the present invention will be described based on FIGS. 1 and 2. In the figure, reference numeral 1 denotes a ventilation fan main body having a rectangular opening in the front-rear direction, and a plurality of shutter plates 2 are disposed in the rear opening of the ventilation fan main body 1 so as to be openable and closable using a fulcrum pin 8 as a fulcrum.

Each shutter plate 2 is made of a resin material through a connection bin a9.
It is rotatably connected to the connecting rod 3 by. A locking plate 4 is rotatably connected to the connecting rod 3 through a connecting pin b141/ic made of a resin material, and a locking portion 4d is provided on the opposite side of the connecting pin b14 on the locking plate 4. A lock hole 4c and two protrusions 4a, 4b
This is provided.

A cylindrical metal lock pin 5 fixed to the ventilation fan body 1 is inserted into the lock hole 4c. A Y-shaped cam e is attached to the ventilation fan body 1 by a metal cylindrical cam pin 7.
The figure 7 cam 6 is rotated to maintain a position where the two legs 6a and 6b alternately abut against the two protrusions 4a and 4b. Ventilation fan body 1
A pipe 1 made of copper or brass material is fixed to the holder, and a heater 1 made of nickel-chromium wire is attached to the outer periphery of the pipe 1 made of copper or brass material.
1 is wound, and a coiled shape memory alloy 12 made of Ni-Ti alloy is provided inside with one end fixed to the ventilation fan main body 1 and the other end connected to the Y-shaped cam. . Note that 13 in the figure is a power cord that connects the heater 11 and a motor (not shown) in parallel to a power source.

In the above configuration, when the power cord 13 is energized, the heater 11 is heated, and while the vibrator 1o is at a high temperature, the shape memory alloy 12 provided therein shrinks and attracts the Y-shaped cam e, and as a result, the lock plate 4 The protrusion 4a is pushed up and the lock part 4d is disengaged from the lock pin 5 to release the lock, and at the same time, the wind pressure of the ventilation fan starts rotating, and the shutter plate 2 is opened with the fulcrum pin 8 as the center of rotation and the lock pin 5 is moved to the lock part. 4d and the shutter is locked.

Next, when the ventilation fan is turned off, the spring action of the shape memory alloy 12 causes the figure 7 cam 6 to rotate in the opposite direction to that when energized, and as a result, the protrusion 4b of the lock plate 4 is pushed up and the lock is released.
As the ventilation fan wind pressure is attenuated, the shutter plate 2 closes quietly with the fulcrum pin 8 as the center of rotation.

In addition, in the example, shape memory alloy 1 was used for 6 rotations of the figure 7 cam.
2 was used by heating with a heater, but instead of heating the shape memory alloy 12 with electricity, or using an electromagnet or a solenoid, there will be no difference in the operation and effect.

Effects of the InventionAs is clear from the description of the embodiments above, the present invention consists of a connecting rod that connects shutter plates, a lock plate that connects to this connecting rod, a figure 7 cam that releases the lock, and a figure 7 cam that releases the lock. By providing a displacement body that swings the cam, the number of parts is reduced, and since the shutter plate can be opened and closed using a small and simple mechanism, the main body can be made thinner and failures can be reduced. .

Furthermore, since the shutter is opened and closed by wind pressure, it is possible to eliminate the collision noise between the shutter and the shutter or the ventilation fan body that occurs when the shutter is closed, which has a great practical effect.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing when the shutter of a ventilation fan according to an embodiment of the present invention is closed, FIG. 2 is a cross-sectional view showing when the shutter is open, and FIG. 3 is a cross-sectional view showing the conventional ventilation fan when the shutter is open. FIG. 4 is a sectional view showing the shutter when it is closed. 1... Ventilation fan body, 2... Shutter plate, 3... Connecting rod, 4... Lock plate,
6...Lock pin, 6...7 figure cam,
12...Shape memory alloy. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
Examination 111J book salary 2-・-Sima 7ta one book (5--Dv7 Jin 6・-Yt cam + 2'=lrltXK kidney Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] A plurality of shutter plates rotatably provided in the opening of a ventilation fan main body having an opening in the front-rear direction, a connecting rod connecting the plurality of shutter plates, and an L rotatably connected.
A lock plate having two protrusions provided at both ends of the L-shaped hole, a lock pin attached to the L-shaped hole so as to be rotatable with the main body, and two legs that rotate on the two protrusions. This ventilation fan is provided with a Y-shaped cam and a displacement body connected to the Y-shaped cam.