JP3677754B2 - Trigger type liquid ejector discharge valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a discharge valve of a trigger type liquid ejector.
[0002]
[Prior art]
A general trigger-type liquid ejector that is attached to the mouth and neck of a liquid container that contains liquid is equipped with a plunger-type pump that is mechanically actuated by a trigger on the liquid ejector body. By pushing, the liquid in the pump is pressurized and ejected from the nozzle at the tip of the liquid ejector body, and the trigger is released and the trigger and plunger are returned by a spring built in the pump, so that the liquid in the container Is sucked into the pump.
Incidentally, this type of trigger type liquid ejector is disclosed in Japanese Utility Model Laid-Open No. 4-178558. In this case, the plunger type pump has a discharge valve built in a tip portion near the nozzle in the liquid ejector main body, and the discharge valve presses and seats the valve body on the valve seat with a predetermined elasticity. . In other words, in this discharge valve, when the pressure of the liquid pressurized by pushing the plunger exceeds the valve closing force of the spring, the pressurized liquid opens the valve body, and therefore, the pressure exceeds the predetermined pressure. Only liquid can be ejected and dripping can be reduced.
[0003]
[Problems to be solved by the invention]
However, in this case as well, the pressurized liquid that has passed through the discharge valve is further ejected from the nozzle hole via the flow path in the nozzle, so that the following problems still remain.
{Circle around (1)} At the beginning of pulling of the trigger, that is, at the beginning of pushing in of the plunger, while the leading pressurized liquid flows down the flow path in the nozzle, the efficiency is lowered with time delay or pressure loss. If the previously supplied liquid remains in the nozzle flow path and the nozzle hole, the residual liquid is pushed below a predetermined hydraulic pressure until the leading pressurized liquid reaches the nozzle hole. As a result, good jetting may not be obtained, and liquid dripping may occur from the nozzle hole due to the residual liquid.
(2) At the end of pulling of the trigger, that is, at the end of pushing of the plunger, with the closing of the discharge valve, the liquid in the nozzle passage and nozzle hole is still pressed by the closing valve body, and this nozzle passage and nozzle The liquid pressure in the hole does not drop rapidly, and therefore, the liquid breakage when the ejection stops stops and dripping may occur from the nozzle hole.
The present invention is intended to solve these problems.
[0004]
[Means for Solving the Problems]
From this point of view, the invention of claim 1 connects a nozzle 5 having a nozzle hole 4 in the center to a nozzle connecting cylinder 3 projecting from the discharge side end 2 of the liquid ejector body 1, and the nozzle A valve chamber 7 communicating with the nozzle hole 4 is formed inside the nozzle connecting cylinder 3, and a valve seat 8 and a valve hole 9 facing the front behind the nozzle hole 4 are provided in the valve chamber. The valve chamber 7 communicates with the discharge flow path 6 of the liquid ejector body 1 through these valve seats and valve holes, and liquid can be passed through the valve chamber 7 in correspondence with the valve seat 8. A valve body guide cylinder 10 is provided, a sliding valve body 11 seated on the valve seat 8 is movably mounted in the valve body guide cylinder 10, and a coil spring 12 is mounted in the valve chamber 7. The sliding valve element 11 is pressed and seated on the valve seat 8 by the coil spring.
[0005]
The invention according to claim 2 is the discharge valve of the trigger type liquid ejector according to claim 1, wherein the valve element guide tube 10 is moved forward from around the valve seat 8 to the front end side of the nozzle connecting tube 3. And a fluid passage groove 13 is formed in the cylindrical direction on the inner surface of the valve body guide cylinder, and the sliding valve body 11 is formed in a cup shape so that it can slide within the valve body guide cylinder 10 The tip of the coil spring 12 is inserted into the cup-shaped sliding valve body 11, and the base end is fitted and supported by a protrusion 33 projecting from an appropriate position on the inner surface of the nozzle 5. It consists of
[0006]
The invention according to claim 3 is the discharge valve of the trigger type liquid ejector according to claim 1, wherein the valve chamber 7 projects forward from around the valve seat 8 on the base end side of the nozzle connecting cylinder 3. The valve body guide cylinder 10 is formed by projecting from the appropriate position on the inner surface of the nozzle 5 to the nozzle hole 4 and fitting into the valve chamber formation cylinder 14. The sliding valve body 11 is formed in a cup shape, and a liquid passage window 16 is formed in the proximal end portion of the peripheral wall 15, and the sliding valve body 11 is slid into the valve body guide cylinder 10. The cup-shaped sliding valve body ridges 17 and 18 that are fitted together freely and abut against the inner edge of the valve body guide cylinder 10 and the outer edge 15 of the peripheral wall 15 of the cup-shaped sliding valve body 11 A plurality of supporting protrusions 19 and 20 are provided around the inner periphery of the peripheral wall 15 of the cup-shaped sliding valve body 11 and the inner periphery of the base end portion of the valve body guide tube 10, respectively. Above Comprising respectively is fitted and supported at both ends of the Le spring 12.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Part 1.
1 and 2 show an embodiment of a discharge valve of a trigger type liquid ejector in a valve closing state and a valve opening state according to the inventions of claims 1 and 2.
In the figure, 1 is a liquid ejector body in a trigger type liquid ejector, 2 is a discharge side end portion of the liquid ejector body, and the discharge side end portion is composed of a fitting horizontal cylinder heading forward.
Reference numeral 3 denotes a nozzle connecting cylinder projecting from the discharge side end 2, and the nozzle connecting cylinder has a vertical piece 21 covering the discharge side end 2 at the base end, and is fitted backward from the vertical piece. A horizontal tube 22 is provided so that the fitting horizontal tube is fixedly and watertightly fitted to the outer periphery of the fitting horizontal tube serving as the discharge side end 2, and the nozzle connecting tube 3 surrounds the vertical piece 21. A tapered valve seat 8 and a valve hole 9 facing forward are provided in the inner central portion formed, and these valve seat and valve hole are opened to the discharge flow path 6 of the liquid ejector body 1. Further, an engaging protrusion 23 is provided around the outer periphery of the nozzle connecting cylinder 3.
Reference numeral 5 denotes a cap-shaped nozzle having a nozzle hole 4 in the center. The fitting peripheral wall 24 is fitted to the outer periphery of the nozzle connecting cylinder 3, and an engagement groove 25 is provided in the inner periphery of the fitting peripheral wall 24. Then, the engaging groove is engaged with the engaging protrusion 23 of the nozzle connecting cylinder 3. Further, a short fitting inner cylinder 26 is provided inside the fitting peripheral wall 24, and the fitting inner cylinder is fitted into the inner circumference of the nozzle connecting cylinder 3 in a watertight manner.
The nozzle hole 4 has an annular deep groove 27 around the outer surface of the central portion of the nozzle 5, a small cap-shaped nozzle piece 28 is fitted into the annular deep groove, and a spray spin groove at the center of the nozzle piece. The nozzle guide 29 is provided, and the liquid guide groove 30 is opened along the annular deep groove 27 from the nozzle slot with the spin groove into the nozzle 5. In the illustrated nozzle hole 4, the nozzle hole 29 is provided with a spin groove for spraying, but it may be used for straight injection or foaming.
[0008]
Reference numeral 7 denotes a valve chamber formed inside the nozzle 5 to the nozzle connecting cylinder 3, and the valve chamber communicates with the discharge flow path 6 of the liquid ejector main body 1 through the valve seat 8 and the valve hole 9. .
In the valve chamber 7, a valve body guide tube 10 protrudes forward from around the valve seat 8 of the vertical piece 21, and a liquid flow groove 13 is formed in the tubular direction on the inner surface of the valve body guide tube, A sliding valve body 11 formed in a cup shape in the valve body guide cylinder 10 is slidably mounted.
In addition, a coil spring 12 is housed in the valve chamber 7 so that the tip of the coil spring 12 is fitted into the cup-shaped sliding valve body 11 and the base end is placed at an appropriate position on the inner surface of the nozzle 5. The sliding valve element 11 is pressed and seated on the valve seat 8 by the elasticity of the coil spring.
Reference numeral 31 denotes a nozzle hole cover plate disposed on the front surface of the nozzle 5 and pivotally attached to the upper portion of the nozzle 32 so as to be opened and closed, and is opened upward when liquid is ejected.
[0009]
With the above configuration, when the valve is closed as shown in FIG. 1, a pressurized liquid having a hydraulic pressure that exceeds the elasticity of the coil spring 12 from the liquid ejector body 1 through the discharge flow path 6 by pulling the trigger and pushing the plunger. As shown in FIG. 2, the pressurized liquid causes the sliding valve body 11 to move away from the valve seat 8 against the coil spring 12 through the valve hole 9 of the vertical piece 21, and Open the valve. Then, the pressurized liquid enters the valve chamber 7 through the liquid passage groove 13, and further passes through the liquid guide groove 30 and is ejected as mist from the nozzle hole 4, that is, the nozzle hole 29 with the spin groove. That is, only a pressurized liquid having a fluid pressure equal to or higher than a predetermined value is sprayed well, and no dripping occurs.
The discharge valve is arranged behind the nozzle hole 4 and the flow path in the nozzle from the discharge valve to the nozzle hole 4 is extremely short and thin. At the beginning of pushing, there is little time delay or pressure loss while the first pressurized liquid flows down the flow path in the nozzle, and the efficiency is improved.
[0010]
Further, when the pressure of the supplied pressurized liquid becomes a predetermined value or less at the end of trigger pulling, that is, at the end of pushing of the plunger, the sliding valve body 11 is closed by the elasticity of the coil spring 12, and the sliding valve body Since the liquid in the valve chamber 7 is pulled by the sliding valve body 11 due to the rearward movement of 11 and flows backward, the liquid still in the valve chamber 7 or the nozzle hole 4 is instantaneously depressurized. Therefore, liquid breakage is good when ejection stops and liquid dripping from the nozzle hole does not occur.
[0011]
Part 2.
FIG. 3 shows an embodiment of the discharge valve of the trigger type liquid ejector in the valve closing state according to the inventions of claims 1 and 3.
In the discharge valve of the trigger type liquid ejector of FIGS. 1 and 2, the valve chamber 7 is formed by a valve chamber forming cylinder 14 projecting forward from around the valve seat 8 in the vertical piece 21; The valve body guide cylinder 10 is projected from an appropriate position on the inner surface of the nozzle 5 to the nozzle hole 4 and is inserted into the valve chamber forming cylinder 14 so that the sliding valve body 11 is cup-shaped. And a fluid passage window 16 is formed in the base end portion of the peripheral wall 15, and the sliding valve body 11 is slidably fitted into the valve body guide cylinder 10, and the valve body guide cylinder The cup-shaped sliding valve body retaining protrusions 17 and 18 are disposed around the inner edge of the cup-shaped sliding valve body 11 and the outer edge of the peripheral wall 15 of the cup-shaped sliding valve body 11. A plurality of support ridges 19 and 20 are provided in the inside of the peripheral wall 15 of the valve body 11 and the inner periphery of the base end portion of the valve body guide cylinder 10, and both ends of the coil spring 12 are respectively connected to these support ridges. It is fitted and supported.
In this case, in the assembly, the sliding valve body 11 and the coil spring 12 are pre-installed in the valve body guide cylinder 10 on the nozzle 5 side, and the nozzle 5 is fitted into the nozzle connecting cylinder 3 for easy discharge. Can assemble the valve.
Other configurations and operations are the same as those in the case of FIGS. 1 and 2, and thus the description thereof is omitted with the description of FIGS. 1 and 2.
[0012]
【The invention's effect】
According to the first, second, and third aspects of the invention, the following effects can be achieved by the above-described configuration.
(1) A pressure accumulation type discharge valve can be installed in the nozzle 5 so that only pressurized liquid having a fluid pressure of a predetermined value or more can be ejected from the nozzle hole 4, and good ejection without dripping is achieved. In addition to being able to obtain, the discharge valve can be arranged behind the nozzle hole 4 and the flow path in the nozzle from the discharge valve to the nozzle hole 4 can be made extremely short and thin. In the beginning of pulling of the trigger, that is, at the beginning of pushing of the plunger, the time delay and pressure loss while the first pressurized liquid flows down the flow path in the nozzle can be greatly reduced, and the efficiency can be improved.
(2) When the sliding valve element 11 is closed at the end of pulling of the trigger, that is, at the end of pushing of the plunger, the sliding valve element 11 moves the sliding valve element 11 backward to cause the liquid in the valve chamber 7 to move. The liquid in the nozzle hole 4 can be instantaneously reduced in pressure, and the liquid can be easily discharged when the ejection stops, and the liquid dripping from the nozzle hole 4 is eliminated. be able to.
[0013]
In addition, according to the invention of claim 3, when assembling the discharge valve, the sliding valve body 11 and the coil spring 12 are assembled in advance in the valve body guide cylinder 10 on the nozzle 5 side, and the nozzle Assembly can be facilitated by assembling the nozzle 5 to the connecting cylinder 3 at once.
[Brief description of the drawings]
FIG. 1 is a cut-away side view in a closed state showing an embodiment of the invention relating to a discharge valve of a trigger type liquid ejector according to claims 1 and 2;
FIG. 2 is a cut-away side view of the embodiment in a valve-open state.
FIG. 3 is a cut-away side view in a closed state showing an embodiment of the invention relating to the discharge valve of the trigger type liquid ejector according to claim 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid ejector main body 2 ... Discharge side edge part 3 ... Nozzle connection cylinder 4 ... Nozzle hole 5 ... Nozzle 6 ... Discharge flow path 7 ... Valve chamber 8 ... Valve seat 9 ... Valve hole 10 ... Valve body guide cylinder
11 ... Sliding valve body 12 ... Coil spring
13 ... fluid groove 14 ... valve chamber forming cylinder
15 ... Surrounding wall 16 ... Liquid passage window
17 ... Sliding valve body protrusion 18 ... Slide valve body retaining protrusion
19 ... Supporting ridge 20 ... Supporting ridge
21 ... Vertical piece 22 ... Fitting horizontal cylinder
23 ... engaging ridge 24 ... mating peripheral wall
25: Engaging groove 26 ... Mating inner cylinder
27 ... Deep groove 28 ... Nozzle piece
29… Nozzle hole with spin groove 30… Liquid guide groove
31 ... Lid 32 ... Pivot
33 ...

Claims (3)

A cap-shaped nozzle 5 having a nozzle hole 4 in the center is connected to a nozzle connecting cylinder 3 protruding from the discharge side end 2 of the liquid ejector body 1, and the nozzle 5 to the nozzle connecting cylinder 3 are connected to the nozzle. A valve chamber 7 that communicates with the hole 4 is formed, and a valve seat 8 and a valve hole 9 that face forward behind the nozzle hole 4 are provided in the valve chamber, and the valve chamber is formed through these valve seat and valve hole. 7 is connected to the discharge flow path 6 of the liquid ejector main body 1, and a valve body guide cylinder 10 is provided in the valve chamber 7, which allows liquid to flow corresponding to the valve seat 8. A sliding valve body 11 seated on the valve seat 8 is movably mounted in the valve body guide cylinder 10, and a coil spring 12 is mounted in the valve chamber 7, and the sliding valve is provided by the coil spring. A discharge valve of a trigger type liquid ejector, wherein the body 11 is pressed and seated on the valve seat 8. The valve element guide cylinder 10 is projected from the periphery of the valve seat 8 to the front at the base end side of the nozzle connecting cylinder 3, and a liquid flow groove 13 is formed in the cylinder direction on the inner surface of the valve element guide cylinder. The sliding valve element 11 is formed into a cup shape and is slidably fitted into the valve element guide cylinder 10, and the tip of the coil spring 12 is placed inside the cup-shaped sliding valve element 11. The discharge valve of the trigger type liquid ejector according to claim 1, wherein the discharge valve of the trigger type liquid ejector is inserted and inserted and supported by a protrusion 33 projecting from a proper position on the inner surface of the nozzle 5. The valve chamber 7 is formed by a valve chamber forming cylinder 14 projecting forward from the periphery of the valve seat 8 on the proximal end side of the nozzle connecting cylinder 3, and the valve body guide cylinder 10 is formed on the inner surface of the nozzle 5. From the appropriate position, the nozzle hole 4 is opened and protruded to be inserted into the valve chamber forming cylinder 14 to form the sliding valve body 11 in a cup shape, and at the base end of the peripheral wall 15. A fluid passage window 16 is formed so that the sliding valve element 11 is slidably fitted into the valve element guide cylinder 10, and the inner edge of the valve element guide cylinder 10 and the cup-shaped sliding valve element 11 are fitted. The cup-shaped sliding valve body retaining protrusions 17 and 18 that abut each other on the outer edge of the peripheral wall 15 are provided around the inner wall 15 of the cup-shaped sliding valve body 11 and the valve body. The trigger according to claim 1, wherein a plurality of support protrusions (19, 20) are provided on the inner periphery of the base end of the guide tube (10), and both ends of the coil spring (12) are fitted and supported by these support protrusions. Discharge valve of formula fluid ejector.

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