Valve type nozzle and liquid discharge apparatus
A valve type nozzle controls discharge of liquid by opening and closing an discharge port by a valve element, the discharge port being configured to discharge the liquid, and the valve element being formed movably by applying a predetermined voltage to a piezoelectric element, whereby when the predetermined voltage is applied to the piezoelectric element, the valve element moves in a direction where the moving mechanism opens the discharge port when the piezoelectric element extends. This allows the liquid to be discharged. Further, when the application of the voltage to the piezoelectric element is released, the moving mechanism returns to an original shape, by which the valve element closes the discharge port is closed to prevent the discharge of the liquid.
1. A valve type nozzle that controls discharge of a liquid, the valve nozzle comprising:
a nozzle body;
a discharge port configured to discharge the liquid;
an activation element;
a valve element that moves through activation of the activation element; and
an elastic member provided between the activation element and the valve element,
wherein the elastic member includes:
a deformable portion connected to an end of the valve element;
a fixed portion fixed to the nozzle body;
a guide portion connected to an end of the activation element; and
a bending portion connected to the fixed portion,
wherein, when the activation element deforms toward the discharge port side, the guide portion presses the bending portion, and the bending portion moves the deformable portion and the valve element to a side reverse to a side at which the discharge port is provided, and
wherein, when the activation element deforms toward the side reverse to the side at which the discharge port is provided, a force with which the guide portion presses the bending portion is reduced, and the bending portion moves the deformable portion and the valve element to the side at which the discharge port is provided.
2. The valve type nozzle according to claim 1 , wherein
the deformable portion has a trapezoidal shape when viewed from a direction intersecting with a liquid discharge direction.
3. The valve type nozzle according to claim 2 , wherein
when viewed from the direction intersecting with the liquid discharge direction, a side of the deformable portion at the valve element side is shorter than a side of the deformable portion at the bending portion side.
4. The valve type nozzle according to claim 1 , wherein
when viewed from a direction intersecting with a liquid discharge direction, the discharge port, the deformable portion, the bending portion, the fixed portion, the guide portion, and the activation element are arranged in the stated order.
5. The valve type nozzle according to claim 1 , further comprising
a sealing member provided between the nozzle body and the valve element.
6. The valve type nozzle according to claim 5 , wherein
when viewed from a direction intersecting with a liquid discharge direction, the sealing member is provided between the discharge port and the deformable portion.
7. The valve type nozzle according the claim 1 , wherein
a moving distance of the valve element is twice a moving distance of an end surface of the activation element.
8. The valve type nozzle according to claim 1 , wherein
an end of the activation element at a side reverse to a side at which the guide portion is connected is fixed to the nozzle body.
9. The valve type nozzle according to claim 1 , wherein
the activation element extends in a liquid discharge direction in response to a voltage being applied to the activation element.
10. The valve type nozzle according to claim 1 , wherein the activation element is an piezoelectric element, and the activation element is activated through the application of a predetermined voltage to the piezoelectric element.
11. A liquid discharge apparatus including the valve type nozzle according to claim 1 .