Motion control device and automobile door

Abstract

The aim of the invention is to provide a motion control device with a reduced size and simplified structure. A motion control device has a pressing member for pressing fluid and a fluid control mechanism (130) for controlling movement of the fluid pressed by the pressing member. When an external force on a movable body, or an object to be controlled, in a motion stop state is equal to or below a predetermined value, the fluid control mechanism (130) closes a first flow path (123), through which the fluid pressed by the pressing member passes, by a valve body (132) to prevent movement of the fluid, and when the external force on the movable body exceeds the predetermined value, the fluid control mechanism opens the first flow path (123) to enable movement of the fluid. After the fluid starts to move, even if the external force is reduced to the predetermined value or less, the fluid control mechanism is capable of opening the first flow path (123) to allow the fluid to continue flowing, and is capable of maintaining a motion stop state of the movable body by using the resistance of fluid produced when the pressing member presses the fluid. Further, after the movable body starts its motion, the fluid control mechanism (130) can allow the movable body to continue the motion by an external force smaller than that used when the movable body starts the motion. The motion control device is characterized in that the pressing member presses the fluid by its rotating motion.

Description

technical field [0001] The present invention relates to a motion control device capable of maintaining a motion-stopped state of a movable body to be controlled, and after the movable body starts moving, even if the external force acting on the movable body is lower than that at the start of the motion, The movement of the movable body can be continued. [0002] The present invention also relates to an automobile door constituted by the above-mentioned motion control device. Background technique [0003] Conventionally, there is known a motion control device that includes a pressing member that presses a fluid, and a fluid control mechanism that controls the movement of the fluid pressed by the pressing member. The fluid resistance generated by pushing can keep the motion stop state of the movable body as the control object, and further, after the movable body starts to move, the fluid control mechanism can continue the movable body with a smaller external force than when t...

AI Technical Summary

Problems solved by technology

That is, in order to ensure the moving area of ​​the pressing member, the axial length of the device inevitably becomes long anyway.

In addition, in order to ensure the arrangement space of the fluid control mechanism, the axial length of the device is further increased, so there is a problem that the overall size of the device is likely to be increased.

In addition, in order to ensure the flow path of the fluid, the structure tends to become complicated, and there is a problem that the number of parts tends to increase.

[0005] In addition, in the conventional motion control device, there is a problem that the spring pressure is always applied to the valve body constituting the fluid control mechanism, so when the movement speed of the movable body to be controlled is slow, the movement of the movable body will be affected. Will become intermittent, i.e., between the start of movement and the stop of the movable body, the motion continuation state and the motion stop state (or a state close to the motion stop state) will repeatedly appear in a short cycle

[0006] In addition, in the conventional motion control device, there is also a problem that the movable body starts to move with a strong momentum after the motion stop state of the movable body to be controlled is released.

What is particularly problematic here is that even when the doors are opened and closed at a slow speed, the fluid resistance decreases dramatically as when the doors are opened and closed at a faster speed, so that the doors are opened and closed at an undesired speed.

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