JPH09313999A - Trigger type ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a coil spring, etc., which are set in a cylinder by using an elastic diaphragm as a return spring and to surely eliminate negative pressure in a container by installing an air valve which is opened mechanically and forcibly. SOLUTION: In a trigger type ejector in which a trigger 5 is set movably in an ejector main body 1 having a plunger pump 2 in which a plunger 4 is inserted freely insertably/extractably into a cylinder 3, and the trigger 5 and the plunger 4 are linked together mechanically, the outside end part of the cylinder 3 of the pump 2 and a right place of the plunger 4 are installed in parallel through an elastic diaphragm 6. An outside air introduction route 8 which is formed adjacent to the cylinder 3 and is opened into a container is installed, an air valve 9, which is closed usually, is attached to an appropriate place of the route 8, and a mechanical valve opening means 10 is provided which opens the air valve 9 forcibly associated with the operation in which the trigger 5 is pulled to an appropriate place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trigger type ejector. Here, the trigger type ejector is
It refers to a trigger type sprayer, sprayer, foamer and the like.

[0002]

2. Description of the Related Art This type of trigger type ejector made of synthetic resin is already well known (for example, Japanese Utility Model Laid-Open No. 62-170168).
This type of trigger-type ejector has a plunger movably attached to an appropriate position of an ejector main body having a plunger type pump, and the trigger and the plunger of the plunger type pump are mechanically connected to each other, and the plunger is operated by operating the trigger. The liquid is jetted out by operating the pump by moving in and out.

[0003]

However, the conventional trigger type ejector of this type has a coil spring inside the cylinder in the plunger type pump, and the coil spring urges the plunger in the outgoing direction. Since the plunger pushed in by the trigger is returned, the substantial volume of the cylinder is reduced by the coil spring, so that the cylinder becomes large to secure a predetermined substantial volume, resulting in poor efficiency. The flow of liquid in the cylinder is obstructed by the coil spring. The assembly is not easy because the elasticity of the coil spring acts in a direction against the insertion of the plunger that is airtightly and watertightly inserted into the cylinder. The cost is high. There are problems such as. In order to prevent negative pressure in the container, a check valve for introducing outside air is provided.This check valve opens when the difference in atmospheric pressure between the outside air and the container exceeds the normally closed mechanical load. Since the valve is opened, the inside of the container tends to have a negative pressure, but there is also a problem that the suction efficiency is deteriorated. In the case where the plunger is equipped with a piston, the piston is also used as a sliding valve, and when the piston is pushed in, the ventilation path (which leads to the inside of the container) formed in the cylinder at an appropriate position is mechanically opened. It is also possible to provide such an outside air introduction means. In this case, such a tendency of negative pressure in the container body does not occur, but in the case of not having a piston, such a mechanical outside air introduction means is adopted. It is not possible. In view of the above, the present invention provides the cylinder of the plunger type pump with the outer end portion of the cylinder and the appropriate portion of the plunger continuously connected via an elastic diaphragm, and the elastic diaphragm is also used as a return spring to be installed in the cylinder. Coil springs, etc. are also removed, and in addition, the piston is discharged by also functioning as a piston, and the check valve is removed by providing an air valve that mechanically forcibly opens the valve. It is something to solve.

In view of such a viewpoint, the invention of claim 1 movably mounts the trigger 5 on the ejector main body 1 having the plunger type pump 2 in which the plunger 4 is inserted in and out of the cylinder 3, and the trigger 5 and In the trigger type ejector mechanically linked to the plunger 4, the outer end portion of the cylinder 3 of the plunger type pump 2 and an appropriate position of the plunger 4 are connected to each other via an elastic diaphragm 6. .

According to the second aspect of the present invention, the trigger 5 is movably mounted on the ejector main body 1 having the plunger type pump 2 in which the plunger 4 is inserted into and removed from the cylinder 3, and the trigger 5 and the plunger 4 are attached. In a mechanically linked trigger type ejector, a cylinder receiving cylinder 7 for the plunger type pump 2 is provided at an appropriate position of the ejector main body 1, and the cylinder 3 is fitted inside the receiving cylinder 7. Let
Further, the outer end of the cylinder 3 and the proper position of the plunger 4 are integrally connected to each other through an annular elastic diaphragm 6 whose middle portion bulges outward outward in a uniform manner. Characterize.

According to a third aspect of the present invention, in the first and second aspects of the present invention, an outside air introducing passage 8 is provided adjacent to the cylinder 3 and opened to the inside of the container body. A normally closed air valve 9 is provided at a proper position, and a mechanical valve opening means 10 for forcibly opening the air valve 9 according to a pulling operation is provided at a proper position of the trigger 5.

A fourth aspect of the invention is the invention of the second aspect, in which a space 11 is provided between the outer end of the receiving cylinder 7 and the outer end of the cylinder 3, and the receiving cylinder 7 is provided. The outside air introduction passage 8 for opening the inside of the container through the space 11 is provided in the lower part of the
A skirt 12 that extends to 11 and closes the space 11 is integrally projectingly provided to provide a normally closed air valve 9 that closes the outside air introduction passage 8, and the trigger 5 is pulled to a proper position in accordance with a pulling operation. A mechanical valve opening means 10 for forcibly opening the air valve 9 is provided by projecting a projecting piece 13 for pushing open the skirt 12.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of a trigger type ejector according to the inventions of claims 1 to 4. In the figure, A is a trigger type ejector, 1 is an ejector body of the trigger type ejector, 2 is a plunger type pump included in the ejector body, 3 is a cylinder of the plunger type pump, 4 is Plunger type pump plunger,
Reference numeral 5 denotes a trigger that is movably attached to an appropriate position of the ejector body 1 and is mechanically connected to the plunger 4, and 6 is an elastic diaphragm that integrally connects the outer end portion of the cylinder 3 and the appropriate position of the plunger 4, Reference numeral 7 denotes a cylinder receiving cylinder provided at an appropriate position of the ejector body 1 for fitting the cylinder 3 therein, and 8 denotes
An outside air introduction passage opened to the inside of the container provided adjacent to the cylinder 3, a normally closed air valve 9 provided at a proper position of the outside air introduction passage, and a pulling operation of the trigger at a proper position of the trigger 5. The mechanical valve opening means is provided so as to forcibly open the air valve 9 in accordance with the above, and all are made of synthetic resin molding members.

The ejector main body 1 has an inverted L-shaped pistol shape projecting forward and has a suction passage 14 standing upright on the base side.
, And also has a discharge flow path 15 that faces forward on the front side,
A mounting cylinder that is screwed into the mouth and neck of the container body at the lower end of its base
A suction pipe 16 is provided so as to be loosely inserted into the mounting cylinder 16, a suction pipe 17 is fitted and hung from the suction flow passage 14, and a nozzle 18 is mounted at the front end so as to communicate with the discharge flow passage 15. The nozzle 18 is
Depending on the application, it is optional such as spraying, jetting, foaming, or a switchable type thereof.

The pump 2 is provided with a cylinder receiving cylinder 7 toward the front at a portion corresponding to the inner corner of the L-shaped body of the ejector body 1.
Is provided, the cylinder 3 is fitted inside the receiving cylinder 7, and a short fitting inner cylinder 19 is also provided inside the cylinder 3 in the ejector body 1, and the outer circumference of the fitting inner cylinder 19 is provided. The inner circumference of the inner end portion of the cylinder 3 is fitted and fixed to. Also, the fitting inner cylinder
A suction valve 20 and a discharge valve 21 are provided inside the cylinder 19
Is communicated with the suction flow passage 14 through the suction valve 20 and with the discharge flow passage 15 through the discharge valve 21. Then, a plunger 4 is loosely inserted into and out of the cylinder 3 from the front, and the outer end portion of the cylinder 3 and the middle portion of the plunger 4 bulge outward in a uniform manner at an intermediate portion. Are continuously connected via a ring-shaped elastic diaphragm 6, and a curved concave surface 22 for trigger contact is formed on the outer end surface of the plunger 4. Note that these are integrally molded of synthetic resin.

The trigger 5 has a pair of left and right standing protrusions at the upper end.
23, having a pair of cantilevered shafts 24 projecting from both upstanding projections, pivotally attached to both sides of the front portion of the ejector body 1 by the both cantilevered shafts 24, and mounted so as to be swingable in the front-back direction are doing. In addition, on the upper part of the inner surface (rear surface) of the trigger 5, the plunger pressing protrusion 25
Is provided and the protrusion 25 is abutted against the curved concave surface 22 of the plunger 4, so that the plunger 4 can be mechanically pushed in by pulling the trigger 5. In addition,
Reference numeral 26 is a rib provided in the middle portion of the inner surface (rear surface) of the trigger 5.

The outside air introducing passage 8 has a space 11 formed around the outer end portion between the receiving cylinder 7 and the cylinder 3 by enlarging the inner diameter of the outer end portion of the cylinder receiving cylinder 7.
A through hole 27 communicating with the space 11 is formed at an appropriate position below the receiving cylinder 7, and a ventilation groove 28 and a ventilation hole 29 are provided at appropriate positions of the mounting cylinder 16 so as to communicate with the through hole 27. I am trying to open it to the inside.

The air valve 9 is formed by integrally projecting a skirt 12 from the outer edge of the cylinder 3 and extending it into the space 11 to close the outside air introducing passage 8. Further, the mechanical valve opening means 10 of the air valve 9 is provided with a projecting piece 13 for pushing and opening the skirt 12 in accordance with the pulling operation from a proper position on the rear surface of the middle portion of the trigger 5, from the rib 26 in the figure. Then, the air valve 9 is mechanically forcibly opened by pulling the trigger 5.

The above-mentioned structure and the trigger type ejector A
Is mounted on the mouth and neck of the container containing the liquid by the mounting cylinder 16, and the trigger 5 is released to follow the plunger 4 to operate the pump 2 to suck up the liquid in the container and draw up the pipe 17. Nozzle 18
When the trigger 5 is pulled in this operation, the elastic diaphragm 6 between the cylinder 3 and the plunger 4 plays a role like a piston and a return spring. . Therefore, pump 2
In the cylinder 3, neither a coil spring for returning nor a piston is required.

[0015]

According to the inventions of claim 1, claim 2, claim 3 and claim 4, the cylinder 3 of the plunger type pump 2 is provided.
The elastic diaphragm 6 between the outer end of the
Since they are connected to each other via the, the following effects can be obtained. Since the elastic diaphragm 6 can also serve as a return spring, no coil spring for return is required inside the cylinder 3 of the pump 2. Since a coil spring or the like is not required in the cylinder 3, the substantial volume of the cylinder is not reduced by the coil spring or the like, and the substantial volume of the cylinder 3 can be expanded.
You can improve efficiency. Since a coil spring or the like is not required in the cylinder 3, the liquid flow in the cylinder 3 is not obstructed by the coil spring or the like, and a smooth flow can be obtained. The elastic diaphragm 6 can also serve as a piston, and the plunger 4 does not need a piston. Since the coil spring for return and the like are not required in the cylinder 3 and the piston is not required for the plunger 4, the pump 2 can be easily assembled and the labor of assembly can be reduced. Overall, the cost can be reduced.

In addition, according to the invention of claims 2 and 4, a cylinder receiving cylinder 7 for the plunger type pump 2 is provided at an appropriate position of the ejector main body 1, and the cylinder 3 is accommodated in the receiving cylinder 7. Since the cylinder 3 is internally fitted, the cylinder 3 can be easily fitted and stably mounted, and the outer end of the cylinder 3 and the proper position of the plunger 4 can be evenly arranged at the intermediate portion. Since the elastic diaphragm 6 is integrally connected through the annular elastic diaphragm 6 that bulges outward in a folded shape, the elastic diaphragm 6 can generate a strong bending bending force with a margin. It is possible to secure a sufficient stroke of the plunger 4.

According to the third and fourth aspects of the invention, an outside air introducing passage 8 is provided adjacent to the cylinder 3 to open the inside of the container body, and a normally closed air is provided at a proper position in the outside air introducing passage 8. Since the valve 9 is provided, and the mechanical valve opening means 10 for forcibly opening the air valve 9 in accordance with the pulling operation is provided at a proper position of the trigger 5, the inside of the container body is provided as in the case where the check valve is provided. There is no negative pressure tendency, and the suction efficiency can be improved.

Further, according to the invention of claim 4, there is a space between the outer end of the cylinder receiving cylinder 7 and the outer end of the cylinder 3.
11 is provided around, and an outside air introduction path 8 that opens to the inside of the container through the space 11 is provided in the lower part of the receiving cylinder 7,
Further, there is provided a normally closed air valve 9 for closing the outside air introduction passage 8 by integrally projecting a skirt 12 which extends from the outer end edge of the cylinder 3 into the space 11 and closes the space 11. The mechanical valve opening means 10 for forcibly opening the air valve 9 is provided by projecting the projecting piece 13 that pushes the skirt 12 open in accordance with the pulling operation at a proper position of the trigger 5, so that mechanically and fluidly. A reliable operation can be obtained, and the outside air introduction passage 8, the air valve 9 and the mechanical valve opening means 10 can be simply formed, and the assembly can be performed only by assembling the cylinder 3, the trigger 5 and the like. , No other special assembly is required, and no hassle.

[Brief description of drawings]

FIG. 1 is a cutaway side view showing an embodiment of a trigger type ejector according to the invention of claims 1 to 4. FIG.

FIG. 2 is a cutaway perspective view of a main part member in the same embodiment.

FIG. 3 is an enlarged cutaway side view showing an operating state of a main part in the same embodiment.

[Explanation of symbols]

 A ... Trigger type ejector 1 ... Ejector main body 2 ... Plunger type pump 3 ... Cylinder 4 ... Plunger 5 ... Trigger 6 ... Elastic diaphragm 7 ... Receiving cylinder 8 ... Outside air introduction path 9 ... Air valve 10 ... Mechanical valve opening means 11 … Space 12… Skirt 13… Projection 14… Suction flow path 15… Discharge flow path 16… Mounting tube 17… Suction pipe 18… Nozzle 19… Fitting inner tube 20… Suction valve 21… Discharge valve 22… Curved concave surface 23 … Standing protrusion 24… Cantilever shaft 25… Protrusion 26… Rib 27… Through hole 28… Vent groove 29… Vent hole

Claims (4)

[Claims] 1. A trigger 5 is movably attached to an ejector main body 1 having a plunger type pump 2 in which a plunger 4 is inserted into and out of a cylinder 3, and the trigger 5 and the plunger 4 are mechanically connected to each other. In the trigger type ejector, the trigger type ejector is characterized in that an outer end portion of the cylinder 3 of the plunger type pump 2 and an appropriate position of the plunger 4 are connected to each other through an elastic diaphragm 6. 2. A trigger 5 is movably mounted on an ejector main body 1 having a plunger type pump 2 in which a plunger 4 is inserted into and out of a cylinder 3, and the trigger 5 and the plunger 4 are mechanically connected to each other. In the trigger type ejector, a cylinder receiving cylinder 7 for the plunger type pump 2 is provided at an appropriate position of the ejector main body 1, and the receiving cylinder 7 is provided.
The cylinder 3 is fitted inside the cylinder 3, and the outer end of the cylinder 3 and an appropriate position of the plunger 4 are annular elastic diaphragms 6 in which an intermediate portion thereof bulges outward outward in a uniform manner. A trigger-type ejector characterized by being integrally connected through the. 3. An outside air introducing passage 8 is provided adjacent to the cylinder 3 to open to the inside of the container body, a normally closed air valve 9 is provided at an appropriate place of the outside air introducing passage 8, and an appropriate place of the trigger 5 is provided. The trigger type ejector according to claim 1 or 2, further comprising a mechanical valve opening means 10 for forcibly opening the air valve 9 in accordance with the pulling operation. 4. An outer end portion of the receiving cylinder 7 and the cylinder 3
A space 11 is provided around the outer end of the receiving tube 7 and
An outside air introducing passage 8 for opening the inside of the container through the space 11 is provided in the lower part of the skirt 12, and a skirt 12 that extends from the outer end edge of the cylinder 3 into the space 11 and closes the space 11.
Is provided with a normally closed air valve 9 for closing the outside air introduction passage 8, and a protrusion 13 for pushing the skirt 12 in accordance with a pulling operation is provided at an appropriate position of the trigger 5. Mechanical opening means 10 for forcibly opening the air valve 9
The trigger-type ejector according to claim 2, wherein