JP3580964B2 - Trigger type ejector - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a trigger type ejector.
Here, the trigger type ejector means a trigger type sprayer, an ejector, a foamer, and the like.
[0002]
[Prior art]
A trigger type ejector made of synthetic resin provided with a plunger type pump operated by a trigger is already well known (for example, Japanese Utility Model Application Laid-Open No. Sho 62-170168).
In this type of trigger type ejector, a trigger is movably mounted at an appropriate position of an ejector body having a plunger type pump, and the trigger is mechanically connected to the plunger of the plunger type pump. The pump is actuated by letting in and out to obtain a jet of liquid.
[0003]
[Problems to be solved by the invention]
However, this type of conventional trigger type ejector has a plunger type pump in which a coil spring is provided inside a cylinder, and the coil spring urges the plunger in an outward direction to return the plunger pushed by the trigger. In addition, since the suction valve and the discharge valve of separate members are attached to the suction path and the discharge path of the ejector body separately from these,
{Circle around (1)} Since the substantial volume of the cylinder is reduced by the coil spring, the cylinder becomes large in order to secure a predetermined substantial volume, and the efficiency becomes poor.
{Circle around (2)} The flow of liquid in the cylinder is hindered by the coil spring.
{Circle around (3)} The elasticity of the coil spring acts on the plunger that is airtightly and watertightly fitted into the cylinder in the direction opposite to the insertion, so that assembly is not easy.
{Circle around (4)} It is necessary to assemble the suction valve and the discharge valve individually, which increases the number of members and takes time and effort to assemble.
(5) In general, the cost is considerably high.
There are problems such as.
In view of the above, the present invention replaces the plunger type pump with a bellows type pump and also uses the elastic force of the elastic bellows as the return spring, thereby eliminating the return coil spring and the like, and providing the elastic bellows with the same. An object of the present invention is to solve the above-mentioned problems by reducing the number of members and simplifying the assembly by integrally attaching the valve bodies of the suction valve and the discharge valve in a predetermined form.
[0004]
In view of such a viewpoint, the invention of claim 1 is directed to an ejector body 1 having a suction flow path 3 having a suction pipe 2 suspended at an upstream end and a discharge flow path 5 having a nozzle 4 attached at a downstream end. , A trigger type ejector equipped with a bellows type pump 6 and a trigger 8 for compressing an elastic bellows 7 of the bellows type pump 6, wherein the bellows type pump 6 has An annular bellows fitting portion 9 is provided behind the trigger 8 so as to face the trigger 8, and inside the bellows fitting portion 9, the valve seat 11 and the valve hole 12 of the suction valve 10 and the discharge valve 13 are provided. A valve seat 14 and a valve hole 15 are provided, and the valve hole 12 of the suction valve 10 communicates with the suction passage 3, and the valve hole 15 of the discharge valve 13 communicates with the discharge passage 5. Bellows 7 has a proximal end A base fitting tube 17 is integrally protruded from the base 16, the base fitting tube 17 is fitted to the bellows fitting portion 9 in a watertight manner, and further, the suction valve is provided inside the base end portion 16. The ten valve elements 18 and the valve element 19 of the discharge valve 13 are integrally provided, and these valve elements 18 and 19 are seated on the valve seats 11 and 14, respectively.
[0005]
According to a second aspect of the present invention, there is provided the invention of the first aspect, wherein the ejector main body 1 is provided with a cylinder 20 surrounding the elastic bellows 7, and a slider 21 pressed by the trigger 8 in the cylinder 20. Is movably mounted to communicate with the tip of the elastic bellows 7, and the slider 7 is provided with ventilation means 22 in the front-rear direction on the outer peripheral surface, and hermetically slides with the inner periphery of the cylinder 20 at the rear end. A skirt 23 to be freely fitted is provided around, and a ventilation groove 24 for breaking the airtightness of the skirt 23 is formed at the rear end portion of the inner peripheral surface of the cylinder 20. An air passage 25 communicating with the inside of the container body is formed at an appropriate position of the container body 1.
[0006]
According to a third aspect of the present invention, in the first aspect of the present invention, a distal end fitting tube 26 is provided to project from the distal end of the elastic bellows 7 and the trigger 8 corresponding to the distal end fitting tube 26 is provided at an appropriate position. An annular bellows connecting portion 27 is provided so as to be fitted and connected to each other in a watertight manner. Further, a short cylinder 28 surrounding the base end 16 of the elastic bellows 7 is provided on the ejector main body 1, and the elastic bellows 7 A skirt 29 is provided around the outer periphery of the base end portion 16 and is airtightly fitted to the short cylinder 28 to form a normally-closed outside air introduction air valve 30. A protruding piece 31 for pushing the skirt 29 open at an appropriate position of the trigger 8 and forcibly opening the outside air introduction air valve 30 with a pull operation is provided, and further communicates with the outside air introduction air valve 30. Then, it is passed into the container inside the proper place of the ejector body 1 By forming a vent passage 32.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Part 1.
1 and 2 show an embodiment of a trigger type ejector according to the first and second aspects of the present invention.
In the figure, reference numeral 1 denotes an ejector main body having a suction flow path 3 having a suction pipe 2 suspended at an upstream end and a discharge flow path 5 having a nozzle 4 attached at a downstream end, and 6 denotes an ejector main body. The bellows type pump 8 mounted on 1 is a trigger mounted on the ejector main body 1 so that the elastic bellows 7 of the bellows type pump 6 can be compressed, and all are made of a synthetic resin molded member.
[0008]
The ejector main body 1 has an inverted L-shaped pistol shape protruding forward, has a suction passage 3 standing upright on the base side, and a discharge passage 5 heading forward on the front side. At the lower end of the base, there is provided a mounting cylinder 33 screwed into the mouth and neck of the container body. The suction pipe 2 is loosely inserted into the mounting cylinder 33 to fit the suction pipe 2 from the suction channel 3 vertically. The nozzle 4 is mounted in communication with the discharge channel 5. The trigger 8 is pivotally mounted at the front part, and is vertically suspended to be swingable in the front-rear direction. The nozzle 4 is optional, such as a nozzle for spraying, a nozzle for jetting, a nozzle for foaming, or a nozzle capable of switching among them, depending on the application.
[0009]
The bellows type pump 6 is provided with an annular bellows fitting portion 9 facing the trigger 8 at a portion corresponding to the L-shaped inner corner of the ejector main body 1 and behind the trigger 8. 9, a valve seat 11 and a valve hole 12 of a suction valve 10 and a valve seat 14 and a valve hole 15 of a discharge valve 13 are provided, and the valve hole 12 of the suction valve 10 is provided in the suction flow path 3 and the discharge thereof. The valve hole 15 of the valve 13 communicates with the discharge flow path 5, and the elastic bellows 7 is integrally provided with a base fitting tube 17 protruding from a base portion 16. The valve body 18 of the suction valve 10 and the valve body 19 of the discharge valve 13 are integrally provided inside the base end portion 16 in a watertight manner. 19 is seated on each of the valve seats 11 and 14.
Further, a cylinder 20 surrounding the elastic bellows 7 is provided in the ejector main body 1, and a slider 21 pressed by a trigger 8 is movably provided in the cylinder 20 so as to be linked with the tip of the elastic bellows 7. Is provided with a ventilating means 22 in the front-rear direction on the outer peripheral surface, and at the rear end, a skirt 23 is fitted around the inner periphery of the cylinder 20 so as to be slidable in an airtight manner, and a rear end portion of the inner peripheral surface of the cylinder 20 is provided. A vent groove 24 for breaking the airtightness of the skirt 23 is formed, and a vent passage 25 leading to the inside of the container body is formed at an appropriate position of the ejector main body 1 to communicate with the vent groove 24.
[0010]
The bellows fitting portion 9 is formed between the two cylinders by projecting the inner and outer double cylinders 34 and 35 forward, and the cylinder 20 is integrally connected to the tip of the outer cylinder 35. Therefore, the valve seat 11 and the valve hole 12 of the suction valve 10 and the valve seat 14 and the valve hole 15 of the discharge valve 13 are formed in the inner cylinder 34.
The valve seat 11 and the valve hole 12 of the suction valve 10 are formed by projecting a small-diameter valve seat cylinder 36 forward in the center of the inner cylinder 34 and concentrically with the inner cylinder. The valve seat 14 and the valve hole 15 of the discharge valve 13 are provided in the inner cylinder 34 in the middle of the inner cylinder 34 and the small-diameter valve seat cylinder 36 and concentrically with the large-diameter valve seat 36. By providing the diameter valve seat cylinder 37, the outer periphery of the large diameter valve seat cylinder 37 is used as the valve seat 14, and the space between the inner cylinder 34 and the large diameter valve seat cylinder 37 is used as the valve hole 15. 12 and 15 are connected to the suction flow path 3 and the discharge flow path 5 through through holes 38 and 39 formed in the ejector main body 1, respectively.
The valve element 18 of the suction valve 10 includes a spherical elastic piece 40 bulging rearward from the base end 16 of the elastic bellows 7, and a guide rod 41 projecting rearward from the center of the rear surface of the elastic piece 40. Are formed by integral molding, the guide rod 41 is loosely inserted into the valve hole 12, the intermediate portion of the elastic piece 40 is pressed against the valve seat 11 by its own elasticity, and the elastic piece 40 A plurality of liquid passage holes 42 are formed in the vicinity of the intermediate portion, and the valve is opened by creating a negative pressure in the elastic bellows 7, and the liquid from the suction passage 3 is passed through the liquid passage hole 42 so that the elastic bellows 7 can be opened. It is supplied inside.
The valve body 19 of the discharge valve 13 is formed by integrally projecting an inward skirt 43 around the valve body 18 of the suction valve 10 from the base end portion 16 of the elastic bellows 7 to the rear. A valve 43 is fitted to the valve seat 14, the valve is opened by the pressurized liquid sent out from the inside of the elastic bellows 7 through the liquid passage 42, and this pressurized liquid is supplied to the discharge channel 5.
[0011]
At the tip of the elastic bellows 7, a tip fitting tube 44 is protruded, and the slider 21 is formed in a laterally cup-like shape having a small diameter in three steps toward the front, and the front end face is formed into a concave surface 45. Then, a pressing projection 46 provided at an appropriate position on the rear surface of the trigger 8 abuts against the concave surface 45, and an annular bellows connecting portion 47 facing rearward is provided inside the bellows connecting portion 47. 7 are fitted and connected in a watertight manner.
Further, the slider 21 has ventilation means 22 in the front-rear direction on the outer periphery of a large-diameter rear end 48 having a skirt 23 formed at the rear end. The inner diameter of the cylinder 20 is made slightly smaller, and a plurality of guide ridges in the cylinder direction are juxtaposed on the outer peripheral surface thereof so as to be opened to the outside.
The trigger 8 has a pair of left and right upright projections 49 at the upper end, and a pair of cantilever shafts 50 protrudingly provided on both upright projections 49, and is provided on both sides of the front part of the ejector main body 1 by the two cantilever shafts 50. It is attached pivotally and swingably in the front-rear direction.
A ventilation path 25 that leads from the ventilation groove 24 that breaks the airtightness of the skirt 23 to the inside of the container is opened from the inside of the cylinder 20 to the inside of the mounting cylinder 33 at the rear end of the cylinder 20.
[0012]
In use, the elastic bellows 7 is mounted on the mouth and neck of the container body containing the liquid by the mounting cylinder 33, and the trigger 8 is released to compress the elastic bellows 7 via the slider 21 so that the bellows type is used. The pump 6 is operated to suck up the liquid in the container via the suction pipe 2 and pressurize it to eject it from the nozzle 4 (spraying, jetting, foaming, etc.). In this operation, the trigger 8 is pulled and compressed. The elastic bellows 7 extended by its own elasticity returns the slider 21 and the trigger 8. The slider 21 restricts the elastic bellows 7 to extend and contract in the straight direction by sliding in the cylinder 20.
When the trigger 8 is pulled, the skirt 23 of the slider 7 reaches the ventilation groove 24 and the airtightness of the skirt 23 is broken. To prevent negative pressure due to a decrease in liquid in the container.
[0013]
Part 2.
FIG. 3 shows an embodiment of the trigger type ejector according to the first and third aspects of the present invention.
In this case, 1. In the elastic bellows 7, a tip fitting tube 26 is protruded at the tip end, and an annular bellows connecting portion composed of inner and outer double tubes 51, 52 is provided on the upper rear surface of the trigger 8 corresponding to the tip fitting tube 26. 27, the jetting device main body 1 is provided with a short cylinder 28 surrounding the base end 16 of the elastic bellows 7, and the ejector body 1 is provided with a short tube 28 surrounding the base end 16 of the elastic bellows 7. An outwardly facing skirt 29 is provided around the outer periphery, and the skirt 29 is airtightly fitted to the inner peripheral surface of the short cylinder 28 to form a normally closed outside air introducing air valve 30. A protrusion 31 is provided at an appropriate position on the rear surface of the trigger 8 corresponding to a part of the opening to push open the skirt 29 and forcibly open the outside air introduction air valve 30 with a pulling operation. The above-mentioned injection Place the container body of the vessel main body 1 that is to form the air passage 32 leading into the hollow mounting 33.
Others are described in 1. It is almost the same as that of 1. The description is omitted here.
[0014]
Because of the above configuration, In this case, when the trigger 8 is pulled, the protrusion 31 on the trigger 8 causes the protruding piece 31 on the trigger 8 to be turned on. To open the outside air introduction air valve 30 mechanically forcibly, and to allow outside air to flow into the container through the ventilation path 32, thereby preventing the negative pressure due to the decrease in the liquid in the container.
[0015]
【The invention's effect】
According to the first, second and third aspects of the present invention, the following effects are achieved by the above-described configuration.
{Circle around (1)} The elastic bellows 7 can also serve as a return spring, and no return coil spring or the like is required inside the pump.
{Circle around (2)} Since no coil spring or the like is required in the pump, the substantial volume of the pump is not reduced by the coil spring or the like, and the substantial volume of the pump can be enlarged and the efficiency can be improved.
(3) Since a coil spring or the like is not required in the pump, the flow of liquid in the pump is not hindered by the coil spring or the like, and a smooth flow can be obtained.
(4) The elastic bellows 7 eliminates the need for a plunger and a piston.
(5) No return coil spring or the like is required in the pump, no plunger or piston is required, and the valve body 18 of the suction valve 10 and the valve body 19 of the discharge valve 13 are connected to the elastic bellows 7. Since the pump can be integrally provided, the assembly of the elastic bellows 7 and the assembly of the suction valve 10 and the discharge valve 13 can be performed at one time, so that the pump can be easily assembled and the labor of the assembly can be greatly reduced.
(6) Overall, costs can be reduced.
[0016]
In addition, according to the second and third aspects of the present invention, the valve mechanism for introducing outside air into the container body is mechanically forcibly opened even with the bellows type pump 6 by the above-described configuration. Therefore, unlike the case where a check valve is used, the inside of the container does not have a negative pressure tendency, and the efficiency of the pump can be improved.
[0017]
According to the third aspect of the present invention, the skirt 29 of the outside air introduction air valve 30 can be provided integrally with the elastic bellows 7, and the outside air introduction air valve 30 can be assembled at once by assembling the elastic bellows 7. It is not necessary to assemble the outside air introducing air valve 30.
[Brief description of the drawings]
FIG. 1 is a cutaway side view showing an embodiment of a trigger type ejector according to the first and second aspects of the present invention.
FIG. 2 is a cutaway side view of a main part showing an operation in the embodiment.
FIG. 3 is a sectional side view showing an embodiment of the trigger type ejector according to the first and third aspects of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Ejector main body 2 ... Suction pipe 3 ... Suction flow path 4 ... Nozzle 5 ... Discharge flow path 6 ... Bellows type pump 7 ... Elastic bellows 8 ... Trigger 9 ... Bellows fitting part 10 ... Suction valve 11 ... Valve seat 12 ... valve hole 13 ... discharge valve 14 ... valve seat 15 ... valve hole 16 ... base end part 17 ... base end fitting cylinder 18 ... valve body 19 ... valve body 20 ... cylinder 21 ... slider 22 ... ventilation means 23 ... skirt 24 ... Vent groove 25 ... Vent path 26 ... Tip fitting cylinder 27 ... Bellows connection part 28 ... Short cylinder 29 ... Skirt 30 ... Air valve 31 for outside air introduction ... Protrusion piece 32 ... Vent path 33 ... Mounting cylinder 34 ... Inner cylinder 35 ... Outside Cylinder 36 ... Small diameter valve seat cylinder 37 ... Large diameter valve seat cylinder 38 ... Through hole 39 ... Through hole 40 ... Elastic piece 41 ... Guide rod 42 ... Liquid hole 43 ... Skirt 44 ... Tip fitting cylinder 45 ... Concave surface 46 ... Pressing Protrusion 47 ... Bellows connecting part 48 ... Rear end part 49 ... Standing up Piece 50 ... cantilever shaft 51 ... inner cylinder 52 ... outer cylinder

Claims (3)

An ejector body 1 having a suction flow path 3 having a suction pipe 2 vertically provided at an upstream end and a discharge flow path 5 having a nozzle 4 provided at a downstream end is equipped with a bellows type pump 6. A trigger type ejector equipped with a trigger 8 for compressing an elastic bellows 7 of a mold pump 6, wherein the bellows type pump 6 has the ejector body 1 attached to the trigger 8 behind the trigger 8. An annular bellows fitting portion 9 is provided to face each other, and a valve seat 11 and a valve hole 12 of a suction valve 10 and a valve seat 14 and a valve hole 15 of a discharge valve 13 are provided inside the bellows fitting portion 9. The valve hole 12 of the suction valve 10 communicates with the suction flow path 3, and the valve hole 15 of the discharge valve 13 communicates with the discharge flow path 5. Projecting fitting tube 17 integrally The base fitting tube 17 is fitted to the bellows fitting portion 9 in a watertight manner. Further, the valve body 18 of the suction valve 10 and the valve body 19 of the discharge valve 13 are fitted inside the base end 16. A trigger type ejector characterized in that the valve bodies 18 and 19 are respectively seated on the respective valve seats 11 and 14. The ejector main body 1 is provided with a cylinder 20 surrounding the elastic bellows 7, and a slider 21, which is pressed by the trigger 8, is movably provided in the cylinder 20 so as to be linked with the tip of the elastic bellows 7. The slider 7 is provided with a back-and-forth ventilating means 22 on the outer peripheral surface thereof, and a skirt 23 is provided at the rear end of the slider 7 so as to be slidably and airtightly slidable on the inner periphery of the cylinder 20. A vent groove 24 for breaking the airtightness of the skirt 23 is formed at the rear end of the inner peripheral surface, and a vent passage 25 communicating with the vent groove 24 is formed at an appropriate position of the ejector main body 1 to communicate with the inside of the container. Item 4. A trigger type ejector according to Item 1. A tip fitting tube 26 is protruded from the tip of the elastic bellows 7, and an annular bellows connecting portion 27 is provided at an appropriate position of the trigger 8 corresponding to the tip fitting tube 26 so as to be fitted and connected to each other in a watertight manner. In addition, a short tube 28 surrounding the base end portion 16 of the elastic bellows 7 is provided on the ejector main body 1, and a skirt 29 is provided around the outer periphery of the base end portion 16 of the elastic bellows 7 to form the short tube 28. To form a normally closed outside air introducing air valve 30 and push open the skirt 29 by pulling it in place on the trigger 8 corresponding to a part of the skirt 29 to introduce outside air. A protruding piece 31 for mechanically forcibly opening the air valve 30 is protrudingly provided, and is further connected to the outside air introduction air valve 30 so as to communicate with the outside air introduction valve 30 at an appropriate position of the ejector main body 1 and an air passage 32 communicating with the inside of the container. The trigger type according to claim 1, wherein a trigger is formed. Can.

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