Discharge container
This discharge container is a discharge container provided with a container main body, a discharge pump and a fixing cap, in which the discharge pump is provided with a cylinder member made of a large-diameter cylinder and a small-diameter cylinder, a piston member mounted on the cylinder member and a nozzle head. The piston member is provided with a piston, a poppet valve, a piston guide, an air piston, an air piston valve and a stem. The air piston is provided with an inner tube portion engaged with the outer circumference of the piston guide, an upper wall portion having an air hole, and a sliding tube portion engaged with the large-diameter cylinder internally so as to slide freely. The stem is provided with a lower tube portion engaged with the upper part of the piston guide to form a gas-liquid mixing chamber including a ball valve internally at the upper part of the piston guide and also engaged with the upper inner tube of the inner tube portion so as to slide freely and a mesh ring mounted on the upper inner circumference of the air piston. The nozzle head is mounted on the outer circumference of the stem.
1. A discharge container, comprising a container main body, a discharge pump for discharging a contained liquid from a nozzle, and a fixing cap, wherein
the discharge pump comprises a cylinder member made of a large-diameter cylinder and a small-diameter cylinder having an inlet pipe at a lower end, a piston member mounted on the cylinder member, and a nozzle head,
the piston member comprises:
a piston that is engaged with the small-diameter cylinder internally so as to slide freely and includes a tube portion and a first engaging flange installed on an upper outer circumference of the tube portion;
a poppet valve engaged with the piston;
a piston guide that is engaged with an upper end of the piston, and includes an outer tube portion, a partition plate disposed on an inner circumference of the outer tube portion and an inner tube portion installed vertically from a lower face of the partition plate;
an air piston that is provided with an inner tube portion engaged with an outer circumference of the piston guide, an upper wall portion having an air hole, and a sliding tube portion engaged with the large-diameter cylinder internally so as to slide freely, thus forming an air chamber inside the large-diameter cylinder;
an air piston valve engaged with a lower external circumference of the inner tube portion to open and close the air hole of the air piston; and
a stem that is provided with a lower tube portion engaged with an upper part of the piston guide to form a gas-liquid mixing chamber including a ball valve inside the upper part of the piston guide and also engaged with an upper inner tube of the inner tube portion so as to slide freely and a mesh ring mounted on an upper inner circumference; further wherein
the outer tube portion of the piston guide is provided with an upper tube portion, a diameter-expanding tube portion, a lower tube portion, and a second engaging flange in descending order,
an inner circumference of the lower tube portion is engaged with the upper outer circumference of the tube portion of the piston,
the second engaging flange is installed at a lower end of the diameter-expanding tube portion and engaged with an upper face of the first engaging flange of the piston,
an outer circumference of the inner tube portion is engaged with the inner circumference of the lower tube portion at the outer tube portion and is engaged with an upper part of an inner circumference of the tube portion of the piston, thereby the piston guide is fitted and attached to the upper part of the piston,
the nozzle head is mounted on an outer circumference of the stem, and
a vent hole is drilled in a circumference wall of the large-diameter cylinder, and the vent hole is opened or closed by vertical movement of the sliding tube portion, thereby preventing the container main body from being made negative in pressure by a suction of the contained liquid thereinside.
2. The discharge container according to claim 1 , wherein
an engaging portion is formed at an upper end of an inner circumference on the circumference wall of the large-diameter cylinder, and an inner lid having an upper plate and an engaging tube is fitted and attached to the engaging portion.
3. The discharge container according to claim 1 , further comprising:
a valve member installed at a lower-end opening portion inside the cylinder member so as to be separated from the lower-end opening portion;
a first elastic member arranged between the piston and the valve member inside the cylinder member so as to urge the piston upward;
a second elastic member for urging the nozzle head upwardly to the stem which is installed between the nozzle head and the stem.
4. The discharge container according to claim 3 , wherein
the nozzle is made gradually smaller in passage-channel cross-section along a continuous hole from a leading-end opening portion.
5. The discharge container according to claim 3 , wherein
the second elastic member is smaller in urging force than the first elastic member.
6. The discharge container according to claim 4 , wherein
the second elastic member is smaller in urging force than the first elastic member.
7. The discharge container according to claim 3 , wherein
the cylinder member is a cylinder for contained liquid and the piston is a piston for contained liquid,
the discharge pump comprises the large-diameter cylinder at which the air piston is installed thereinside so as to slide freely;
a gas-liquid mixing chamber at which a contained liquid sent out from the cylinder for contained liquid is mixed with air sent out from the large-diameter cylinder;
a contained liquid discharge valve is installed on a valve seat provided at a contained liquid entrance of the gas-liquid mixing chamber so as to be separated from the valve seat; and
a bubble foaming member is installed between the nozzle and the gas-liquid mixing chamber, further wherein
the nozzle head is pushed down, by which a contained liquid inside the container main body is mixed with air inside the gas-liquid mixing chamber and the contained liquid mixed with air is bubbled in the course of passing through the bubble foaming member, thereby discharging the thus bubbled contained liquid from the nozzle.
8. The discharge container according to claim 4 , wherein
the cylinder member is a cylinder for contained liquid and the piston is a piston for contained liquid,
the discharge pump comprises the large-diameter cylinder at which the air piston is installed thereinside so as to slide freely;
a gas-liquid mixing chamber at which a contained liquid sent out from the cylinder for contained liquid is mixed with air sent out from the large-diameter cylinder;
a contained liquid discharge valve is installed on a valve seat provided at a contained liquid entrance of the gas-liquid mixing chamber so as to be separated from the valve seat; and
a bubble foaming member is installed between the nozzle and the gas-liquid mixing chamber, further wherein
the nozzle head is pushed down, by which a contained liquid inside the container main body is mixed with air inside the gas-liquid mixing chamber and the contained liquid mixed with air is bubbled in the course of passing through the bubble foaming member, thereby discharging the thus bubbled contained liquid from the nozzle.
9. The discharge container according to claim 5 , wherein
the cylinder member is a cylinder for contained liquid and the piston is a piston for contained liquid,
the discharge pump comprises the large-diameter cylinder at which the air piston is installed thereinside so as to slide freely;
a gas-liquid mixing chamber at which a contained liquid sent out from the cylinder for contained liquid is mixed with air sent out from the large-diameter cylinder;
a contained liquid discharge valve is installed on a valve seat provided at a contained liquid entrance of the gas-liquid mixing chamber so as to be separated from the valve seat; and
a bubble foaming member is installed between the nozzle and the gas-liquid mixing chamber, further wherein
the nozzle head is pushed down, by which a contained liquid inside the container main body is mixed with air inside the gas-liquid mixing chamber and the contained liquid mixed with air is bubbled in the course of passing through the bubble foaming member, thereby discharging the thus bubbled contained liquid from the nozzle.
10. The discharge container according to claim 6 , wherein
the cylinder member is a cylinder for contained liquid and the piston is a piston for contained liquid,
the discharge pump comprises the large-diameter cylinder at which the air piston is installed thereinside so as to slide freely;
a gas-liquid mixing chamber at which a contained liquid sent out from the cylinder for contained liquid is mixed with air sent out from the large-diameter cylinder;
a contained liquid discharge valve is installed on a valve seat provided at a contained liquid entrance of the gas-liquid mixing chamber so as to be separated from the valve seat; and
a bubble foaming member is installed between the nozzle and the gas-liquid mixing chamber, further wherein
the nozzle head is pushed down, by which a contained liquid inside the container main body is mixed with air inside the gas-liquid mixing chamber and the contained liquid mixed with air is bubbled in the course of passing through the bubble foaming member, thereby discharging the thus bubbled contained liquid from the nozzle.