JP2535556Y2 - Liquid injector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a manually operated small liquid ejector.

`` Prior art '' As is well known, this type of liquid ejector is provided with a press-down head with a nozzle tube communicated with the upper end of a stem rising upward and outward from a liquid pressurizing cylinder installed in the mouth of the container body, The liquid in the cylinder is pressurized by the cylindrical piston at the lower end of the stem by operating the press-down head against a return spring installed in the cylinder, and the pressurized liquid is used to open the discharge valve of the stem. Is ejected outward from the nozzle tube.

When the liquid injection is completed, the movable parts of the stem, piston, and push-down head return upward by the return spring, and the pressure inside the cylinder is reduced by this return. The cylinder liquid is sucked up from the inside of the container through the pipe.

"Problem to be solved by the invention" In this type of injector, a floating ball valve is used as a discharge valve,
As a suction valve, a plate-like valve with a tongue-shaped valve section cut out from an elastic plate is often used.However, in the case of these ball valves and elastic plate-like valves, the response becomes unstable when handling highly viscous liquids. However, the operation of the on-off valve tends to lack certainty.

The present invention provides a liquid ejector which has a structure in which a discharge valve and a suction valve are mechanically opened / closed in response to pushing and returning of a movable portion, so that the opening / closing operation of these two valves can be reliably performed.

[Means for Solving the Problems] The liquid ejector of the present invention is provided with a vertically long guide tube 7 that is vertically penetrated in the center of the container 1 and the top plate 6.
A valve seat 9 for a suction valve 8 is formed on the lower inner surface of the container body, and a suction pipe 10 hanging down from the guide cylinder 7 below the valve seat 9 into the container body 1 is vertically provided. A screw cap 2 attached to the screw cap 2 and an elastically deformable bounce-shaped base 11 airtightly attached to the upper surface of the top plate 6 of the screw cap 2 for a pressurizing chamber for airtightly circumscribing the guide cylinder 7. A vertically operating cylinder 3 is provided to penetrate the cylinder 12, and a lowering operation member 3 integrally provided by connecting a lowering head 14 having a nozzle pipe 13 on one side to an upper end of the cylinder 12 through a discharge hole 15, Hole
A flat valve plate 17 that forms a discharge valve 16 by closing 15 from above
A discharge valve body 4 having a valve shaft 18 hung downward through a discharge hole 15 and the guide cylinder 7 are inserted through a gap, and an upper end opening is inserted into and engaged with the valve shaft 18, and a closed lower part is the valve. It comprises a hollow elevating body 5 formed in a valve body 19 joined to the seat 9 to form the suction valve 8.

FIG. 1 shows a state in a steady state. In this state, the liquid is filled in the cylinder 12, and the push-down operation member 3 is extended upward by the elasticity of the base 11. Therefore, the discharge valve 16 is closed and the suction valve 8 is closed.
Is open.

Here, when ejecting the liquid, the press-down head 14 is pushed downward. Then, the base 12 is deformed and the cylinder 12 is lowered downward in the same manner, so that the discharge valve 16 is opened, and at the same time, the internal volume of the cylinder 12 is reduced, so that the liquid in the cylinder 12 is pressurized. As a result, the pressurized liquid path from the discharge hole 15 to the nozzle pipe 13 is opened, and the elevating body 5 is pushed downward to close the suction valve 8, so that the pressurized liquid is ejected from the nozzle pipe 13 to the outside. You. FIG. 2 shows the final point of the pressing stroke.

When the pushing is stopped, the push-down operation member 3 of the movable portion attempts to return upward by the accumulating force of the base 11, and first, the discharge valve 16 is closed to make the inside of the cylinder 12 a negative pressure, and at the same time the elevating body 5 rises. Since the suction valve 8 is opened, the liquid in the container 1 is sucked into the cylinder 12 from the suction valve 8 through the suction pipe 10 and returns to the state shown in FIG.

In this operation, the discharge valve 16 and the suction valve 8 are mechanically opened and closed in connection with the depression and return of the depression operation member 3, so that the operation is reliable.

[Embodiment] Hereinafter, an embodiment will be described with reference to the drawings. A liquid ejector according to the present invention includes a container body 1, a screw cap 2, a push-down operation member 3, a discharge valve body 4, and an elevating body 5. Make up.

 The container body 1 has a screw formed on the outer surface of the mouth and neck.

The screw cap 2 is provided with a vertically long cylindrical guide tube 7 penetrating up and down in the center of the top plate 6, and a suction valve 8 having a lower inner surface of the guide tube 7, the upper surface of which is formed as a slanted surface in an oblique inner and lower direction.
And a suction hole 20 is formed in the center of the valve seat 9. A suction pipe 10 communicates with the container 1 from directly below the valve seat 9. A ventilation groove 21 is provided vertically above one side, and furthermore, an engagement peripheral wall 22 extends from the periphery of the top plate 6.
And is screwed to the mouth and neck of the container body 1 by a mounting peripheral wall. 23 is an air hole.

The push-down operation member 3 is an elastically deformable bowl-shaped base.
A vertical cylinder 12 penetrates vertically from the top of the cylinder 11, and a pressing head 14 having a nozzle tube 13 protruding laterally on one side is integrally provided on the top of the cylinder 12, and a pressing head 14 and a cylinder 12 are provided between the pressing head 14 and the cylinder 12. A discharge hole 15 is opened in the partition wall, and the cylinder 12 and the pressing head 14 are communicated with each other.
11 The lower peripheral edge is fixedly engaged with the engaging peripheral wall 22, and the cylinder 12 is provided with two upper and lower engaging projections 24, 25 provided on the inner surface thereof.
And is externally slidably and vertically slidably attached to the guide cylinder 7 via an airtight seal. 26 indicates an air hole.

The discharge valve element 4 allows the valve shaft 8 to pass through the discharge hole 15 from the center of the rear surface of a flat disk-shaped valve plate 17 which is in the liquid path of the press-down head 14 and closes the discharge hole 15 from above. The valve rod 18 has a shape that hangs downward, and an engagement protrusion is provided on the outer surface of the lower end of the valve shaft 18.

The elevating body 5 has a hollow shape, that is, an elongated tubular shape having a lower part closed, and an engaging ridge provided on the inner surface of the upper end is engaged with the engaging ridge to connect the upper end opening to the valve shaft 18. A shaft 27 of the lower closing portion is formed as a thin shaft 27 through which the suction hole 20 passes.
At the lower end, there is provided a radial locking piece 28 for locking to the valve seat 9 to prevent it from coming out upward, and the lower surface is joined to the upper surface of the valve seat 9 to form the same inclined surface forming the suction valve 8. The lower closing portion is inserted as a valve body 19 into the guide cylinder 7 via a gap so as to be able to move up and down.

In this embodiment, while the discharge valve 16 is always closed in FIG.
As the cylinder 12 descends downward by deforming the cylinder 11, the discharge valve 16 is opened, and at the same time, the internal volume of the cylinder 12 is reduced and the liquid in the cylinder 12 is pressurized.
The pressurized liquid passage from 15 to the nozzle pipe 13 is opened, and
Is pushed downward, and the suction valve 8 is closed, so that the pressurized liquid is ejected from the nozzle pipe 13 to the outside. At this time, outside air flows through the air holes 26, the ventilation grooves 21 and the air holes 23 as shown in FIG. After that, the air is sucked into the container body 1 and gas-liquid exchange is performed.

When the pushing is stopped, the push-down operation member 3 of the movable portion attempts to return upward by the accumulating force of the base 11, and first, the discharge valve 16 closes to make the inside of the cylinder 12 a negative pressure, and at the same time the elevating body 15 rises. Then, the suction valve 8 is opened, so that the liquid in the container 1 is sucked into the cylinder 12 from the suction valve 8 through the suction pipe 10 and returns to the original state shown in FIG.

[Effects of the Invention] As described above, in the present invention, both the suction valve 8 and the discharge valve 16 have a structure in which a hard valve element is opened and closed by being brought into contact with and separated from a hard valve seat, respectively. Since the valve is mechanically opened / closed in connection with the pushing and returning operations of the liquid ejecting apparatus, it is possible to provide a liquid ejector capable of reliably performing the opening / closing valve operation regardless of the viscosity of the liquid to be handled.

[Brief description of the drawings]

1 and 2 are longitudinal sectional views of one embodiment of the liquid ejector of the present invention. FIG. 1 is a view at all times, and FIG. 2 is a view at the time of a pressing operation. DESCRIPTION OF SYMBOLS 1 ... Container body, 2 ... Screw cap 3 ... Push-down operation member, 4 ... Discharge valve body 5 ... Lifting body

Claims (1)

(57) [Scope of request for utility model registration] 1. A vertically elongated guide cylinder 7 is provided vertically through the center of a top plate 6 and a container body 1, and a valve seat 9 for a suction valve 8 is formed in the lower inner surface of the guide cylinder 7. A screw cap 2 attached to an opening of the container body 1 with a suction pipe 10 hanging down from the guide cylinder 7 below the seat 9 into the container body 1;
A vertical cylinder 12 for a pressure chamber, which is airtightly circumscribed to the guide cylinder 7, is erected from the top of an elastically deformable broom-shaped base 11 airtightly attached to the top plate 6 of the screw cap 2, At the upper end of the cylinder 12, a pressing head 14 provided with a nozzle tube 13 on one side is communicated with a discharging hole 15, and a pressing operation member 3 provided integrally therewith, and the discharging valve is closed by closing the discharging hole 15 from the upper surface. A discharge valve body 4 having a valve shaft 18 suspended downward from a flat valve plate 17 forming a discharge hole 15 through a discharge hole 15, and inserted into the guide cylinder 7 through a gap.
And a hollow elevating body 5 formed in a valve body 19 which forms a suction valve 8 by joining a closed lower part to the valve seat 9 to form a suction valve 8.