JP2549307Y2 - Manually operated pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manually operated pump used for discharging a liquid such as a mist or a water column or a cream.

[0002]

2. Description of the Related Art A large number of manually operated pumps of this type have been conventionally provided and are well known. FIG. 2 shows an example of a recently applied liquid injector for a tube container (Japanese Utility Model Application No. 2-85).
No. 208) and the manually operated pump is described as the dispenser body.

In the figure, 31 is a cylinder, 32 is this cylinder
A cylindrical piston 33 internally fitted in 31, a lower stem fixed to the cylindrical piston 32 and a stem raised upward and outward, 34
Is a push-down head that projects the nozzle tube 35 to one side and communicates with the upper end of the stem 33, and 36 is built in the cylinder 31, and pushes up the movable parts of the tubular piston 32, the stem 33, and the push-down head 34 upward. A return spring to be urged, 37 and 38 are ball-shaped suction and discharge valves, and 39 is a rod member fixed to the axis of the cylinder 31 and defines the upper limit position of the movable part and the upper limit position of the suction valve 37. Numeral 40 denotes a screw member for locking operation to prevent erroneous pressing. That is, by screwing the screw 41 on the back surface of the press-down head 34 into the female screw member 40 to the position shown below the normal press-down position, the careless press-down operation during the distribution process is prevented. it can. The figure shows this locked state. 42 is a screw cap for mounting.

[0004] With this configuration, the pressing head 34 is connected to the return spring 36.
A cylindrical piston that descends to the same body when pressed down against
Since the liquid in the cylinder 31 is pressurized by the cylinder 32, the pressurized liquid pushes up the discharge valve 38, opens the valve, and is discharged from the nozzle pipe 35 to the outside. When the pouring is completed, the movable parts of the cylindrical piston 32, the stem 33, and the pressing head 34 return upward by the return spring 36,
With this return, the pressure inside the cylinder 31 becomes negative, so the suction valve 37
Is opened to suck up the liquid from the inside of the container 43, and in response to this sucking, a part of the container body is crushed to respond to the sucking. In addition,
When the container body 43 is a rigid bottle, a suction pipe 44 is required as shown by a chain line.

[0005]

One of the problems of this type of manually operated pump is that the number of parts is large and the cost is high. In the above example, even if the screw member 40 is omitted, the cylinder 31, the cylindrical piston 32, the stem 33, the push-down head 34, the return spring 36, the suction valve 37, the discharge valve 38, the rod member 39, the screw cap 42, and the suction It is configured using 10 parts of the tube 44.

An object of the present invention is to provide a manually operated pump which is constituted by as few parts as possible and is intended to reduce the cost.

[0007]

A manually operated pump according to the present invention has a fixed side guide cylinder 7 erected from the periphery of an opening of a mounting screw cap 6 having a large opening at the center of a top plate, and a middle abdomen. A vertically extending cylinder 9 having a vent hole 8 formed therein is vertically suspended from a fixing member 1 and a cylindrical piston 10 slidingly contacting the inner surface of the lower half of the cylinder 9 to raise a stem 11 upward and outward. A movable member having a nozzle tube 12 which is bent to the side and a bent top portion serving as a pressing head 13, and a movable guide tube 14 slidably in contact with the fixed guide tube 7 from the back of the pressing head 13. 2, a return spring 3 which is housed in the cylinder 9 and constantly urges the movable member 2 up to the upper limit, and a predetermined stroke vertical movement to a shaft center from the bottom of the cylinder 9 to the middle abdomen of the stem 11. The valve shaft 15 is installed as possible, The lower end of the valve shaft 15 is a suction valve 17 that can close the suction port 16 at the bottom of the cylinder 9, the upper end is formed as a reverse skirt-shaped discharge valve 18 that resiliently contacts the inner surface of the stem 11, and the lower side from the suction port 16. And a suction pipe 5 which is communicated with the suction pipe 5.

[0008]

FIG. 1 shows a state where the movable portion 2 is pushed up to the upper limit by the return spring 3, the valve member 4 is at the lower limit position, and the suction valve body 17 closes the suction port 16. I have.

At the time of pouring, the movable part 2 is moved by the pressing head 13.
Down. Then the stem 11, which descends to the same body,
Since the cylindrical piston 10 pressurizes the liquid in the cylinder 9, the pressurized liquid is forced to open the discharge valve 18 and is discharged from the stem 11 through the nozzle pipe 12 to the outside.

After the liquid is dispensed, when the pressing is stopped, the movable portion 2 is returned to the upper limit position by the return spring 3, and the pressure in the cylinder 9 is reduced by this return, so that the valve member 4 floats upward and the suction port is lifted. 16 is opened, the liquid in the container (not shown) is sucked into the cylinder 9 by the suction pipe 5, and after this suction, the valve member 4 is lowered to the original position, and each part returns to the old state.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The manually operated pump of the present invention is composed of five members: a fixed member 1, a movable member 2, a return spring 3, a valve member 4, and a suction pipe 5, and the components other than the return spring 3 are formed and formed of a synthetic resin material. You.

The fixing member 1 has a fixed portion formed by one piece, and a fixed side guide cylinder 7 is erected from the periphery of the opening of the mounting screw cap 6 having a large opening at the center of the top plate.
In order to extend the guide cylinder 7 downward, a vertical cylinder 9 whose diameter is reduced in two steps from the periphery of the opening is suspended.

A locking ridge is provided on the inner periphery of the upper end of the fixed-side guide cylinder 7.
19, ventilation holes 8, 8 are opened on both sides of the middle part of the cylinder 9, and a suction port 16 is formed in the center of the bottom of the cylinder 9 to be inclined obliquely inward and downward.
A small-diameter connection cylinder 20 is vertically provided from the lower peripheral edge of the lower surface 16, and several spring receiving pieces 21 are provided on the bottom upper surface so as to surround the suction port 16 in a circumferentially discrete manner.

The movable member 2 is formed by molding the movable portion as one part. The thin valve portion at the lower end is inwardly thickened from the cylindrical piston 10 which is in elastic contact with the inner surface of the small diameter portion of the lower half of the cylinder 9. The stem 11 having the same outer diameter is raised upward and outward, and the upper end of the stem 11 is bent to one side to form a nozzle tube 12, and the bent top is formed on a pressing head 13,
Further, from the back surface of the pressing head 13,
The movable side guide cylinder 14 which is in sliding contact with the inside is vertically provided.

On the outer periphery of the lower end of the movable side guide cylinder 14, there is provided a locking ridge 22 for engaging with the locking ridge 19 to define the upper limit position of the movable portion 2 and to prevent the movable portion 2 from coming off.
A skirt-shaped ventilation elastic valve 23 is provided on the outer surface of the lower portion of the cylinder 11 so as to elastically contact the inner surface of the large-diameter portion in the upper half of the cylinder 9.

The return spring 3 has a coil shape and is housed in the cylinder 9 and is interposed between the spring receiving piece 21 and the downward step of the lower end of the stem 11 to push the movable part 2 up to the upper limit.

The valve member 4 is provided with a round shaft-shaped valve shaft 15 at the shaft center from the bottom of the cylinder 9 to the middle of the stem 11, and the lower end of the valve shaft 15 has a shape corresponding to the suction port 16. A suction valve 17 for closing the suction port 16 is formed,
In addition, the discharge valve 18 is formed by an elastic valve that opens in an inverted skirt shape at the upper end and elastically contacts the inner surface of the stem 11.
At the lower part, several engaging pieces 24 are provided between the spring receiving pieces 21 in the radial direction, and the engaging pieces 24 are lifted from the illustrated position until they are locked to the end faces of the lower end of the return spring 3. It is arranged to be able to move up and down during a stroke.

The upper end of the suction pipe 5 is fitted to the connection pipe 20 and communicated with the cylinder 9, and is suspended below the inside of the container (not shown).

In this embodiment, when the movable portion 2 is pushed down from the constant position in the figure via the push-down head 13, the stem 11 and the cylindrical piston 10 descending into the same body pressurize the liquid in the cylinder 9. The liquid forcibly opens the discharge valve 18 to open the stem 1
1. It is poured out through the nozzle tube 12.

When the push-down operation is stopped by discharging the liquid, the movable portion 2 is returned to the upper limit position by the return spring 3, and the pressure in the cylinder 9 is reduced by this return, so that the valve member 4 floats upward and sucks. The port 16 is opened, and the liquid in the container (not shown) is sucked into the cylinder 9 by the suction pipe 5, and after this suction, the valve member 4 is lowered to the original position, and each part returns to the old state.

In the above embodiment, when the container is a tube container or a bag-like container, the suction pipe 5 is not required. In addition, when the movable portion 2 is not only pushed down but also the return of the movable portion 2 is manually operated, the return spring 3 is not required, and in these cases, only three parts are required.

[0022]

As described above, in the manually operated pump of the present invention, the screw cap 6, the fixed side guide cylinder 7, and the cylinder 9 which are the fixed parts are formed as one part as the fixed member 1, and the movable part is formed by the movable part. A certain cylindrical piston 10, stem 11, push-down head 13, and movable-side guide cylinder 14 are formed as a single member as a movable member 2, and a suction valve 17 and a discharge valve 18 are provided at the upper and lower ends of a long valve shaft 15. Since the valve member 4 is formed of one part, the valve member 4 can be formed of a maximum of five parts, and in some cases, a small number of three parts, and thus has the effect of greatly reducing the cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment.

FIG. 2 is a half vertical sectional side view of a liquid discharging container showing an example of a conventional manually operated pump.

[Explanation of symbols]

 Reference Signs List 1 fixed member 2 movable member 3 return spring 4 valve member 5 suction pipe

Claims (1)

(57) [Scope of request for utility model registration] 1. A fixed-side guide cylinder 7 is erected from the peripheral edge of a mounting screw cap 6 having a large opening at the center of a top plate, and a vertical cylinder 9 having a vent hole 8 opened at the middle abdomen.
A stem 11 is raised upwardly and outwardly from a fixed member 1 having a vertical portion and a cylindrical piston 10 slidably contacting the inner surface of the lower half of the cylinder 9, and the upper end of the stem 11 is bent to one side to form a nozzle tube 12. The bent top portion is used as a pressing head 13, and a movable member 2 having a movable side guide tube 14 slidably contacting the fixed side guide tube 7 from the back portion of the pressing head 13 is provided vertically inside the cylinder 9. A return spring 3 which constantly pushes and urges the movable member 2 up to the upper limit, and a valve shaft 15 which is capable of moving up and down by a predetermined stroke at a shaft center portion from the bottom of the cylinder 9 to the middle abdomen of the stem 11 are provided. The lower end of the shaft 15 communicates with a suction valve 17 that can close the suction port 16 at the bottom of the cylinder 9, the upper end communicates with the valve member 4 formed as an inverted skirt-shaped discharge valve 18 that resiliently contacts the inner surface of the stem 11, and communicates downward from the suction port 16. With the suspended suction pipe 5 Pump manually-operated.