JP2000070783A - Triggered liquid jetting pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the excellent liq. jetting pump of simple structure capable of preventing the mixing of the outside air introduced by the triggering when the pump is inverted and used into a jetted liq. through a pipe. SOLUTION: This pump has a cap main body 8 with a cylinder 6 projected from the intermediate part of a vertical cylinder 5 erected from the upper end of a mounting cap 4 to be engaged with the mouth neck 3 of a vessel and a jetting cylinder 7 from the upper part, the lower end of a first pipe 11 with the upper end connected to the vertical cylinder is connected to the lower end of a second pipe 16 through a switching valve 13-provided connecting member 14, a first suction port 12 as the suction port when the pump is erected is bored in the connecting member communicated with the first pipe, the upper opening of the second pipe opened at the upper part in the vessel is formed as the second suction port 15 when inverted, and a liq. is jetted by the pump when erected and inverted, and one end of the outside air inlet path A with the other end opened in the cylinder 6 and communicating with the inside of the vessel is opened below the second suction port 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trigger type liquid ejection pump, and more particularly, to a trigger type liquid ejection pump capable of ejecting liquid in both upright and inverted states.

[0002]

2. Description of the Related Art As a trigger type liquid ejection pump, for example, a mounting cap fitted to the mouth and neck of a container body, and a cylinder fitted and fixed above the cap and from the middle of a vertical cylinder rising from the upper end of the mounting cap, are used. A pump body protruding forward from each of the injection cylinders from above,
The upper end is connected to the lower end of the vertical cylinder, and a trigger that is vertically slidable from the front position of the injection cylinder and is linked to the front end of the plunger fitted in the cylinder in a forward biased state so that it can be pushed. A first pipe that hangs down in the container body and has a first suction port opened in a lower part of the container body communicates with a lower end part inside the lower end of the first pipe above the first suction port and a second lower part inside the container body. 2. Description of the Related Art There is known a trigger type liquid ejection pump which includes a second pipe having an opening at a suction port and a forward / inverting switching valve for closing a first suction port at the time of inversion, and capable of ejecting liquid in both forward and inverted states. ing.

[0003]

A conventional pump of this type has an outside air introduction passage which is open at one end in a cylinder and communicates with the inside of the container. Although it is configured such that outside air is introduced into the container body from this outside air introduction path, there is no problem with the conventional pump when the liquid is ejected at the time of erecting, but when the liquid is ejected by turning the container upside down, In addition, the air introduced from the outside air introduction passage enters through the second suction port, and as a result, there is a possibility that the inconvenience that air is mixed into the ejected liquid every time the trigger operation is performed.

That is, in a conventional pump, for example, a flange protruding from the outer periphery of a cylindrical fitting cylinder having a lower end opening is pressed against the mouth and neck by means of a flange-like top plate of a mounting cap, and the pump is brought into a container body. It is fixed, and, while projecting through the lower end of the vertical cylinder at the rear of the top plate of the fitting cylinder and projecting, the cylinder is horizontally provided on the fitting cylinder top plate in front of the vertical cylinder, and this top plate portion, An outside air introduction passage is formed by forming a through-hole penetrating through the cylinder. Therefore, the other end opening of the outside air introduction passage is located considerably above the second suction port. Therefore, when the air intake passage is inverted, an opening of the outside air introduction passage exists below the second suction opening, and the outside air introduced by the trigger operation is prevented from flowing. There was a possibility that the liquid would rise and be mixed in from the second suction port.

The present invention has been made in view of the above points, and it is possible to prevent outside air introduced by a trigger operation during inversion use from being mixed into a jet liquid through a pipe, and to have a simple structure. And an excellent trigger type liquid ejection pump.

[0006]

According to a first aspect of the present invention, there is provided a pump comprising a mounting cap for fitting to a mouth and neck portion of a container, and a vertical cylinder rising from an upper end of the mounting cap. A pump body 8 which projects a cylinder 6 from an intermediate part and an injection cylinder 7 from the upper part forward,
A trigger 9 vertically swingably mounted in a forward biased state from a front position of the injection cylinder, and a plunger 10 fitted into the cylinder so as to be able to be pushed into the cylinder in a forward biased state and having a leading end linked to an upper part of the trigger; A first pipe 11 whose upper end is closely fitted to the lower end of the vertical cylinder and is suspended in the container body, and which is closely fitted to the lower end of the first pipe 11 and communicates with the inside of the first pipe to constitute a suction port at the time of erecting. Open the first suction port 12 at the lower end of the container body,
And, a connecting member 14 having a switching valve 13 for closing the first suction port when inverted, and a lower end portion communicating with the inside of the first pipe and closely fitting the lower end to the connecting member, and an upper end constituting the suction port when inverted. In a trigger type liquid ejection pump having a second suction port 15 provided with a second pipe 16 opened in the upper part of the inside of the container and capable of ejecting liquid in both normal and inverted states, one end of the cylinder 6 is provided. Open air introduction passage A that opens to communicate with the inside of the container
The other end is opened below the second suction port 15 to form a trigger type liquid ejection pump.

Further, in the pump according to the second aspect of the present invention, the pump body 8 penetrates a top plate 18a of a fitting tube 18 having a flange 17 mounted on the mouth and neck portion 3 protruding from the outer periphery thereof, thereby connecting the vertical tube 5 to the vertical tube 5. Attachment cap wall that is vertically attached and fitted around the mouth and neck
19 is a pump main body 8 in which the upper surface of the flange 17 is fixed to the container body by press-fixing the upper surface of the flange 17 by a flange portion 20 extending from the upper end edge. A cylindrical part with one end opened to a horizontal plate 28 fitted and closed
A defining space A4 defined by a partition wall member 27 having the other end of the lower end of the second suction port 15 provided below the second suction port 15, a cylinder 6, and a fitting cylinder top plate.
The liquid ejection pump according to claim 1, which is an outside air introduction passage A constituted by a through hole penetrating through 18a.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The trigger type liquid jet pump 1 of the present invention includes a mounting cap 4 fitted to the mouth and neck 3 of the container body 2, a cylinder 6 from an intermediate portion of a vertical cylinder 5 rising from the upper end of the mounting cap, and an injection cylinder from above. A pump body 8 protruding forward from the front of the injection cylinder, a trigger 9 oscillatingly suspended from a front position of the injection cylinder in a forward biased state, and a push-fittable pushable state in the cylinder in a forward biased state. , Plunger 10 with tip linked to upper part of trigger
And a first pipe 11 whose upper end is closely fitted to the lower end of the vertical cylinder and is hung down into the container body, and which is closely fitted to the lower end of the first pipe 11 and communicates with the inside of the first pipe to form a suction port at the time of erecting. A connecting member 14 having a switching valve 13 that opens the first suction port 12 to be formed at the lower end of the container body and closes the first suction port when the container is inverted.
And a second pipe 16 communicating with the inside of the first pipe and closely fitting a lower end portion to the connecting member, and opening a second suction port 15 at an upper end, which constitutes a suction port when inverted, to an upper part of the container body. The liquid can be ejected in both the normal and inverted states.

According to the present invention, this type of pump has a structure in which one end is opened in the cylinder 6 and the other end of the outside air introduction passage A communicating with the inside of the container is opened below the second suction port 15. . By providing such an outside air introduction path A,
When the liquid is ejected by being inverted, outside air introduced every time the trigger operation is performed is prevented from entering through the second suction port 15.

In the illustrated example, a top plate 18 of a fitting tube 18 having a flange 17 mounted on the upper surface of the neck 3 of the container body is provided vertically below the outer periphery.
a The lower end of the vertical cylinder 5 penetrates through the rear part,
The pump 1 is fixed to the container body 2 by pressing and fixing the upper surface of the flange 17 by the flange portion 20 extending inward from the upper end edge of the peripheral wall 19 of the mounting cap 4 screwed to the outer periphery of the mouth and neck portion 3. .

A second pipe 16 is arranged in a double cylindrical shape around the outer periphery of the first pipe 11, and the lower ends of the pipes are connected by a connecting member 14. This connecting member 14 fits the inner periphery of the upper part of the peripheral wall 21 to the lower end of the outer periphery of the first pipe 11 and
A flange 22 protruding from the inner periphery of the first pipe 21 is brought into contact with and engaged with the lower surface of the first pipe 11, the lower surface of which is formed in a tapered valve seat 23, and a first suction port 12 is formed in a lower portion of the peripheral wall. At the same time, the ball valve 25 is placed in a concave portion provided on the upper surface of the bottom wall 24, and the switching valve 13 is configured by the ball valve 25 and the valve seat 23. Also, a plurality of concave grooves 26 communicating from the upper surface of the flange 22 to the inner surface of the peripheral wall 21 are provided in the circumferential direction, and the inside of the first pipe 11 and the inside of the second pipe are connected. The lower end of the second pipe 16 is closely fitted to the upper part of the outer peripheral wall of the connecting member peripheral wall 21 and is erected in the outer periphery of the first pipe 11 in a double cylindrical shape. It opens right below.

The outside air introduction passage A has a first through hole A1 having one end opened at a sliding portion of the plunger 10 at the rear lower portion inside the cylinder 6, and a concave portion A2 formed in the upper surface of the fitting cylinder top plate 18a and extending in the front-rear direction. And a second through-hole A3 having an upper end opened at the rear of the recess.
And a defining space A4 defined by the partition member 27 fitted to the lower end portion of the fitting cylinder 18. The partition member 27
In the illustrated example, a cylindrical portion 29 having an open end is vertically provided below the second suction port 15 in a horizontal plate 28 fitted and closed at the lower end of the fitting cylinder 18 around the lower end of the vertical cylinder 5. An outer peripheral wall 30 closely fitted to the inner surface of the fitting cylinder 18; an inner peripheral wall 31 partially shared with the outer peripheral wall 30 and closely fitted to the outer peripheral lower end of the vertical cylinder 5; A partition member 27 is composed of a horizontal plate 28 that closes an opening at the lower end of the joint tube 18 and a cylindrical portion 29 that is partially open at the front of the horizontal plate 28 and vertically extends downward.

The other parts of the pump in the illustrated example will be described. The interior of the vertical cylinder 5 and the cylinder 6 and the interior of the vertical cylinder 5 and the interior of the injection cylinder 7 are communicated with each other. A discharge valve 33 is provided in the vertical cylinder 5 downstream of the cylinder, and a discharge nozzle 34 is fitted to the tip of the injection cylinder 7. In the case of using the container having such a configuration, the plunger 10 is retracted by pulling the trigger 9 at the time of erecting, and the cylinder 6 is retracted.
The internal liquid is pressurized to open the discharge valve 33 and is ejected from the injection cylinder 7 through the ejection port of the ejection nozzle 34. Next, when the trigger 9 is released, the plunger 10 moves forward due to the forward bias of the spring, and the suction valve 32 is opened into the cylinder 6 under negative pressure to introduce the liquid in the container body 2. On this occasion,
The liquid in the container 2 passes through the first pipe 11 from the first suction port 12 and is introduced into the cylinder 6 via the suction valve 32. In addition, outside air is introduced through a outside air introduction passage A into the container body which is reduced in pressure as the liquid is introduced into the cylinder 6.

Next, a description will be given of the ejection of the liquid at the time of inversion. In the inverted state, the ball valve 25 falls on the valve seat 23, the switching valve is closed, and the first suction port 12 and the first pipe 11 are closed. Communication with is interrupted. In this state, when the trigger 9 is pulled, the liquid is ejected in the same manner. Next, when the plunger 10 moves forward, the liquid is introduced into the cylinder from the second suction port 15 through the second pipe 16 and the respective concave grooves 26 through the first pipe 11 and the outside air is introduced. Outside air is introduced into the container via the path A, floats in the storage liquid, and is introduced into the upper container body bottom.

The embodiment shown in FIG. 2 is the same as the above embodiment except for the structure of the member fitted to the lower end of the vertical cylinder such as the first pipe fitted to the lower end of the vertical cylinder 5. Are denoted by the same reference numerals and description thereof is omitted.

In this embodiment, the first pipe 11 and the second pipe 11
16 are connected in parallel with the lower end of each pipe by a connecting member 14. The connecting member 14 in this embodiment has an auxiliary cylinder 36 connected to the upper front part of a main cylinder 35 whose upper part is closely fitted to the lower end of the outer periphery of the first pipe 11. A plurality of locking ribs 38 are provided in the circumferential direction in the main cylinder 35 and the auxiliary cylinder 36 at the same level as the through hole 37. In addition, a downward valve seat 39 is protruded immediately below the through hole 37 in the main cylinder 35,
The first suction port 12 is bored in the main cylinder wall below the valve seat 39, and the ball valve 41 is mounted on the main cylinder bottom wall 40. The switching valve 13 is switched between the ball valve 41 and the valve seat 39. Make up. In this embodiment, the connecting member
14 is composed of two members. The upper end second suction port 15 of the second pipe 16 whose lower end is closely fitted in the auxiliary cylinder 36 is connected to the vertical cylinder 5.
It opens right below.

The operation of this embodiment is substantially the same as that of the above-described embodiment, and will not be described. Each of the above members is mainly formed of a synthetic resin.

[0018]

As described above, the pump of the present invention has one end opened in the cylinder and the other end of the outside air introduction passage communicating with the inside of the container is opened below the second suction port. At the time of jetting of air, there is no inconvenience that air introduced from the outside air introduction hole is mixed into the pipe,
A good liquid can be ejected.

Further, according to the second aspect of the present invention, the above-mentioned effect can be exerted only by fitting a partition member having an extremely simple structure, and has the advantages of being easy to manufacture and being inexpensive. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment of the present invention.

[Explanation of symbols]

2 ... container body, 3 ... mouth and neck, 4 ... mounting cap, 5 ... vertical cylinder, 6 ... cylinder, 7 ... injection cylinder, 8 ... pump body, 9 ...
Trigger, 10 ... plunger, 11 ... first pipe, 12 ... first
Suction port, 13 switching valve, 14 connecting member, 15 second suction valve, 16 second pipe, 17 flange, 18 fitting tube, 18a
… Top plate, 19… Surface of mounting cap, 20… Flange, 22…
Flange, 27 ... Partition wall member, 28 ... Horizontal plate, 29 ... Cylindrical part, A ... Outside air introduction path, A4 ... Definition space

Claims (2)

[Claims] 1. A mounting cap 4 fitted to the mouth and neck portion 3 of a container body 2, a cylinder 6 protrudes forward from an intermediate portion of a vertical cylinder 5 rising from the upper end of the mounting cap, and an injection cylinder 7 protrudes from the upper part. A pump body 8 comprising: a pump body 8;
A plunger that is fitted into the cylinder so that it can be pushed in the forward biased state, and the tip is linked to the upper part of the trigger.
10, a first pipe 11 whose upper end is closely fitted to the lower end of the vertical cylinder and which is suspended in the container body, and which is closely fitted to the lower end of the first pipe 11 and which communicates with the inside of the first pipe and is a suction port at the time of erecting A connection member 14 having a switching valve 13 that opens a first suction port 12 at the lower end of the container body and that closes the first suction port when the container is inverted.
And a second pipe 16 communicating with the inside of the first pipe and closely fitting a lower end portion to the connecting member, and opening a second suction port 15 at an upper end, which constitutes a suction port when inverted, to an upper part of the container body. In the trigger type liquid ejection pump capable of ejecting the liquid in both the normal and inverted states, the other end of the outside air introduction path A having one end opened in the cylinder 6 and communicating with the inside of the container is connected to the second end. A trigger type liquid ejection pump characterized by being opened below the suction port 15. 2. The vertical body 5 is suspended from the pump body 8 through a top plate 18a of a fitting tube 18 having a flange 17 mounted on the mouth and neck 3 projecting from the outer periphery thereof. Flange extending from the upper edge of the mounting cap peripheral wall 19 fitted to the
The pump body 8 is formed by fixing the upper surface of the flange 17 by pressure contact with the container 20 and fixing the same to the container body. Board28
A space A4 defined by a partition wall member 27 having the other end of the cylindrical portion 29 having one end opened below the second suction port 15 and a through hole penetrating the cylinder 6 and the fitting cylinder top plate 18a. 2. The liquid jet pump according to claim 1, wherein the liquid jet pump is an external air introduction path A.