JPH065555Y2 - Movable plate drive mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention is, for example, in a damper device, a movable plate such as a flap plate that automatically opens and closes a passage in a desired state according to a ventilation temperature is automatically and reversely moved. The present invention relates to a drive mechanism for rotating.

"Prior Art" As a conventional movable plate driving mechanism, for example, the actual opening 6
1-98256 exists.

Although not specifically shown, the conventional drive mechanism rotatably supports a movable plate on a bearing through its own rotation shaft, and at the same time, a tension coil-shaped shape memory alloy is provided at an appropriate position of the movable plate. A spring and a bias spring are mounted respectively, and when the shape memory alloy spring overcomes the spring pressure of the bias spring due to a temperature change, the movable plate is rotated in one desired direction via the rotation shaft, On the other hand, when the bias spring overcomes the spring pressure of the shape memory alloy spring, the movable plate is rotated in the other direction this time.

"Problems to be solved by the invention" However, in the above conventional drive mechanism, the movable plate is normally or reversely moved in the desired direction only by the difference in spring pressure between the shape memory alloy spring and the bias spring due to temperature change. Since it rotates, it is necessary not only to use a high output spring with a large diameter and a long size for each spring depending on the weight and size of the movable plate, but also for each spring to use the spring pressure of the other side. Since it has to be extended or contracted until it is completely overcome, a space for allowing this expansion and contraction stroke is also required, and there is a big problem that the mechanism itself becomes unnecessarily large.

"Means for Solving Problems" The present invention was developed in order to effectively solve the problems of such a conventional drive mechanism, and the movable plate is rotated by itself in response to temperature changes. Assuming a drive mechanism that rotates in the forward and reverse directions via a moving shaft, the rotating shaft of the movable plate is provided with one arm that deforms in accordance with a temperature change and another arm that is simply linear. A first spring member that projects in the opposite direction and is provided with a turning force in one direction is attached to the tip of one arm, and a turning force in the opposite direction is given to the tip of another arm. A configuration is adopted in which the second spring members are mounted respectively and the spring pressures of the first spring member and the second spring member are relatively changed by the deformation of one arm body according to the temperature change.

According to the “action”, according to the present invention, one arm provided on the rotary shaft of the movable plate is attached to the one arm by being deformed into a desired shape according to the temperature change. The spring pressure of the first spring member and the second spring member attached to another arm relatively changes, and the spring force of the spring member, which has won by the change, causes the movable plate to automatically move. It is possible to rotate in the forward and reverse directions.

[Embodiment] Hereinafter, the present invention will be described in detail based on an illustrated embodiment, and each of the illustrated embodiments is applied to a drive mechanism of a flap plate in a damper device and according to a temperature change. It is premised that the movable plate (flap plate) is rotated in the forward and reverse directions via its own rotation shaft. The characteristic feature is the following structure.

That is, in the drive mechanism according to the first embodiment, as shown in FIG. 1, the rotary shaft 2 integrally formed on both sides of the movable plate 1.
The one arm 3 that can be deformed according to the temperature change and the other linear arm 4 that is deformed in accordance with the temperature change are placed in at least one of the two directions so as to be opposite to each other and parallel to the movable plate 1. A protruding coil-shaped first spring member 5 that applies a turning force in one direction is attached to the tip end portion 3a of one arm body 3 while protruding, and the tip end portion 4a of the other arm body 4 is The second spring members 6 each having a tension coil shape for imparting a turning force in a direction opposite to the first spring member 5 are mounted, and the one arm 3 is deformed according to a temperature change, whereby the first spring member 5 is deformed. 5, the spring pressure of the second spring member 6 is relatively changed, and the movable plate 1 is rotated by the spring member having the higher spring pressure.

In the present embodiment, only the one arm 3 is formed of a plate or rod made of a shape memory alloy, and extends linearly at high temperature, and the first arm 3 at low temperature. Although the one that is heat-treated so as to bend toward the spring member 5 side is used, it is not only optional to use one made of a material such as bimetal having the same deformation characteristics depending on the implementation, but conversely, at the time of high temperature. It is also possible to use a material which is curved and heat-treated so as to linearly expand at low temperatures.

Therefore, the drive mechanism having such a structure is installed in the ventilation passage 7 of the damper device, and the low temperature port 7a of the passage 7 is set in accordance with the ventilation temperature.
When the high temperature port 7b is opened and closed and the ventilation air supplied to the passage 7 is at a low temperature, the one shape memory alloy arm 3 is completely curved downward as shown in FIG. 2A. First spring member 5
As a result of dampening the tension spring pressure, the spring pressure of the second spring member 6 mounted on the other linear arm body 4 overcomes, so that the movable plate 1 itself uses the spring pressure of the second spring member 6. The upper and lower ends are rotated counterclockwise in the figure to open the low temperature port 7a and close the high temperature port 7b until the passage 7 comes into contact with the wall surface, thus allowing passage of low temperature ventilation. .

However, in such a state, when hot air is supplied to the passage 7, the arm 3 made of shape memory alloy senses the temperature as shown in FIG. Since it linearly extends, the spring pressure of the first spring member 5 starts to gradually overcome the spring pressure of the second spring member 6 in response to this.
The movable plate 1 is rotated clockwise.

Then, when the first arm 3 is completely extended, the first
Since the spring member 5 completely overcomes the spring pressure of the second spring member 6, the movable plate 1 rotates until its upper and lower ends contact the wall surface of the passage 7, and as shown in FIG. This time, the high temperature port 7b is opened and the low temperature port 7a is closed to allow passage of high temperature ventilation.

Further, even when the high temperature ventilation state is changed to the low temperature ventilation state, the one arm 5 is similarly curved and the spring pressure of the first spring member 5 is attenuated, so that the first spring member 5 and the second spring Since the spring pressure of the member 6 is relatively changed, the movable plate 1 is rotated by the spring pressure of the second spring member 6 to open the low temperature port 7a and open the high temperature port 7b.
Needless to say, it will be blocked.

In the above embodiment, the normal tension coil spring is used for the first spring member 5 and the second spring member 6, but it is mounted on the side of the one arm 3 made of shape memory alloy. If a shape memory alloy coil spring that is heat-treated so as to expand at low temperature and contract at high temperature is used as the first spring member 5
Since the mechanism is made more compact and a large rotational force can be obtained, reliable and quick rotation of the movable plate 1 is guaranteed.

Next, the drive mechanism according to the second embodiment will be explained. This embodiment is based on the first embodiment as it is, but the difference is that it is made of a shape memory alloy as shown in FIG. The one arm 3 stores a shape that is curved in a direction opposite to that at a low temperature when the temperature is high.

Therefore, even in the second embodiment, when the airflow supplied to the passage 7 is low, as shown in FIG. 3A, the one shape memory alloy arm 3 is completely curved downward. Then, the tension spring pressure of the first spring member 5 is attenuated, and the movable plate 1 is rotated counterclockwise in the figure by the spring pressure of the second spring member 6 attached to the other arm body 4. Then, when the low temperature port 7a is opened and the high temperature port 7b is closed, and conversely high temperature ventilation is supplied to the passage 7, the temperature is detected by one arm 3 made of a shape memory alloy as shown in FIG. Then, since it bends largely upward, this time the first spring member 5
The spring pressure of # 1 overcomes the spring pressure of the second spring member 6 to rotate the movable plate 1 clockwise in the drawing to open the high temperature port 7b and close the low temperature port 7a. It is the same.

However, in the present embodiment, the one arm 3 bends in the opposite direction not only when the temperature is low but also when the temperature is high, so that there is an advantage that the rotation angle of the movable plate 1 can be made as large as possible.

Although each of the above embodiments is applied to a damper device, the present invention is not limited to this, and it is necessary to rotate the movable plate in the forward and reverse directions according to temperature changes. Needless to say, it can be easily implemented and applied to the above device.

[Advantages of the Invention] As described above, according to the present invention, one arm that deforms in response to temperature changes and another mere linear arm are provided on the rotary shaft of the movable plate in opposite directions. A first spring member that imparts a turning force in one direction is attached to the tip of one arm, and a second spring member that imparts a turning force in the opposite direction is attached to the tip of the other arm. The spring pressures of the first spring member and the second spring member are relatively changed by the deformation of the one arm according to the temperature change. The movable plate can automatically rotate in the forward and reverse directions simply by deforming one arm provided on the rotary shaft of the movable plate into a desired shape.

Moreover, by relatively changing the spring pressures of the first spring member and the second spring member by the deformation of one arm, it is possible to increase the rotational force of the movable plate without using a high-output spring for each spring member. Therefore, the mechanism itself can be greatly contributed to miniaturization, and the movable plate can be rotated at an arbitrary angle by the deformed shape of one arm.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part showing a drive mechanism according to a first embodiment of the present invention, FIGS. 2A to 2C are cross-sectional views of the main part showing an operating state of the drive mechanism, and FIGS. It is a principal part sectional view which shows the drive mechanism which concerns on 2nd Example, and its operating state. 1 ... Movable plate, 2 ... Rotation axis, 3 ... One arm, 3a ...
... Tip part of one arm, 4 ... Other arm, 4a ... Tip part of other arm, 5 ... First spring member, 6 ... Second spring member.

Claims (1)

[Scope of utility model registration request] 1. A drive mechanism for rotating a movable plate in forward and reverse directions via its own rotating shaft in response to a temperature change, wherein the rotating shaft of the movable plate deforms in response to a temperature change. The arm and the other arm that is just straight are projected in opposite directions,
Also, a first spring member that applies a turning force in one direction is attached to the tip of one arm, and a second spring member that applies a turning force in the opposite direction is attached to the tip of the other arm. Then, the first spring member and the second spring member are deformed by the deformation of the one arm body according to the temperature change.
A movable plate driving mechanism, characterized in that the spring pressure of a spring member is relatively changed.