SOLENOID VALVE AND ELECTRONIC BLOOD PRESSURE MONITOR EQUIPPED WITH THE SAME

摘要

In a solenoid valve, a bobbin and a solenoid coil are accommodated in a casing. A rod-shaped plunger is slidably inserted into the bobbin. A core provided with a flow port through which a fluid flows is disposed on one side of the casing. A valve body is attached to one end opposing the flow port of the plunger. In a non-operating period during which a solenoid coil is in a non-energized state, the valve body moves away from the flow port due to the biasing force applied by the biasing portion and another end of the plunger protrudes outward from the casing through the through hole, abuts against lock portions disposed outside of the casing, and is thereby locked. The lock portions can be elastically deformed by an external force such that separation of the plunger and the valve body from the casing is allowed.

主权项

1. A solenoid valve capable of variably controlling a flow amount of a fluid, comprising:
a casing; a bobbin accommodated in the casing; a solenoid coil wound around the bobbin; a rod-shaped plunger slidably inserted in the bobbin; a core that is provided with a flow port through which a fluid flows and is disposed on a side of the casing opposing one end of the plunger; a valve body that is provided on the one end of the plunger and is disposed so as to oppose the flow port; and a biasing portion that biases the plunger in a direction of moving away from the core, wherein, in a non-operating period, during which the solenoid coil is in a non-energized state, the valve body provided on the one end of the plunger moves away from the flow port and another end opposite to the one end of the plunger protrudes outward from the casing through a through hole, abuts against a lock portion disposed outside of the casing, and is thereby locked, wherein in a working period during which the solenoid coil is in an energized state, the flow amount of the fluid flowing through the flow port is adjusted due to the plunger and the valve body being moved inside the bobbin against the biasing force applied by the biasing portion, due to a magnetic force generated by the solenoid coil, and wherein the lock portion can deform elastically due to an external force such that separation of the plunger and the valve body from the casing is allowed.