Trigger type liquid jetting device and manufacturing method thereof

Abstract

To manufacture various trigger type liquid jetting devices having different discharge modes with low costs.SOLUTION: A trigger type liquid jetting device includes: a jetting device body 2 attached to a container body A storing liquid; a nozzle member 3 attached to the jetting device body and formed with a jetting hole 4 for jetting liquid forward; and a bubble forming member 6 arranged in front of the jetting hole and having a bubble forming cylinder 55 surrounding the jetting hole from the outside in a nozzle radial direction. The jetting device body includes: a vertical supply cylinder part 10 that sucks the liquid in the container body; and a trigger mechanism 20 that includes a trigger part 21 arranged so as to be movable to rearward and causes the liquid to circulate from the vertical supply cylinder part to the jetting hole side by movement of the trigger part to rearward. The nozzle member 3 is formed with a first lock part 53. The bubble forming member is formed with an outside air introduction hole 55a that introduces outside air to the inside of the bubble forming cylinder, and a second lock part 56 locked to a first lock part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a trigger-type liquid ejector and a method for manufacturing the same. [Background technology]

[0002] Conventionally, trigger-type liquid ejectors that suck up liquid from a container body by moving a trigger part back and forth and eject the liquid through an ejection hole include a configuration that ejects the liquid by foaming it, as shown in Patent Document 1 below, and a configuration that ejects the liquid in a mist, as shown in Patent Document 2 below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-084070 [Patent Document 2] JP 2018-140820 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, when varying the liquid ejection patterns in this way, nozzle members with different structures have been used, which has created the problem that it is difficult to manufacture a variety of trigger-type liquid ejectors with different ejection patterns at low cost.

[0005] The present invention provides a trigger type liquid ejector and a manufacturing method thereof that can produce a variety of trigger type liquid ejectors with different ejection modes at reduced cost. [Means for solving the problem]

[0006] A trigger-type liquid ejector according to one embodiment of the present invention comprises a ejector body that is attached to a container body containing liquid, a nozzle member that is attached to the ejector body and has an ejection hole that ejects liquid forward, and a foam-forming member that is arranged in front of the ejection hole and has a foam-forming cylinder that surrounds the ejection hole from the outside in the nozzle radial direction, wherein the ejector body comprises a vertical supply tube section that sucks up the liquid in the container body, and a trigger section that is arranged movably rearward, and a trigger mechanism that causes the liquid to circulate from within the vertical supply tube section toward the ejection hole by moving the trigger section rearward, wherein the nozzle member has a first locking section, and the foam-forming member has an outside air introduction hole that introduces outside air into the inside of the foam-forming cylinder, and a second locking section that engages with the first locking section.

[0007] Since the foam-forming member has a second locking portion that locks to the first locking portion formed on the nozzle member, even if the nozzle member is the same, two types of trigger-type liquid ejectors with different liquid ejection patterns can be obtained simply by the presence or absence of the foam-forming member. Since a first locking portion is formed on the nozzle member and a second locking portion is formed on the foam-forming member, even if there are multiple types of nozzle members with different ejection patterns, it is possible to attach the foam-forming member by forming a first locking portion that can engage with the second locking portion.For example, by changing the combination of the type of nozzle member and the presence or absence of a foam-forming member on a production line, a variety of trigger-type liquid ejectors with different ejection patterns can be easily obtained, and a variety of trigger-type liquid ejectors can be manufactured at low cost.

[0008] The ejector main body includes an ejection tube section extending forward from the vertical supply tube section, a pressure accumulator member arranged within the ejection tube section so as to be movable back and forth and which blocks communication between the interior of the vertical supply tube section and the ejection hole through the interior of the ejection tube section, and an elastic body which urges the pressure accumulator member which has moved rearward toward the front, and the pressure accumulator member may move rearward when pressure within the ejection tube section increases, thereby connecting the interior of the vertical supply tube section to the ejection hole through the interior of the ejection tube section.

[0009] Since a pressure accumulator and an elastic body are provided, when the pressure inside the injection tube reaches or exceeds a predetermined value, it becomes possible to connect the inside of the vertical supply tube with the injection tube, thereby enabling the liquid to be stably ejected in the desired manner. Because the pressure accumulating member is disposed within the injection tube portion, it is possible to select at the time of design either a configuration in which the pressure accumulating member abuts against the inner surface of the injection tube portion in the radial direction when the pressure accumulating member blocks communication between the interior of the vertical supply tube portion and the injection hole through the injection tube portion, or a configuration in which the pressure accumulating member abuts against the inner surface of the injection tube portion in the front-to-rear direction, making it possible to easily obtain a variety of trigger-type liquid ejectors with different ejection patterns. Since the pressure accumulator member is provided inside the injection tube, the nozzle member can be made smaller and the structure can be simplified, compared to when the pressure accumulator member is provided inside the nozzle member. Since the pressure accumulator is provided inside the injection tube, the internal volume of the injection tube can be reduced without increasing the number of parts. This allows the pressure inside the injection tube to be increased quickly when the trigger is operated, making it possible to reduce the number of priming operations. Furthermore, by reducing the internal volume of the injection tube, air is less likely to remain inside the injection tube, making it possible to suppress variations in the amount of injection and dripping from the injection hole caused by remaining air.

[0010] The injection tube portion extends forward from the upper end of the vertical supply tube portion and is provided with a biasing member that biases the trigger portion that has moved rearward toward the front, and a blocking portion that blocks the rear end opening of the injection tube portion, the biasing members being provided separately on both sides of the ejector body in the left-right direction, the elastic body protruding forward from the blocking portion and inserted into the injection tube portion, and the biasing member, the blocking portion, and the elastic body may be integrally formed from a resin material.

[0011] Since the biasing member, the blocking portion, and the elastic body are integrally formed from a resin material, an increase in the number of parts can be suppressed.

[0012] A method for manufacturing a trigger type liquid ejector according to one aspect of the present invention includes a trigger type liquid ejector comprising: a ejector body that is attached to a container body containing liquid; and a nozzle member that is attached to the ejector body and has an ejection hole formed therein for ejecting liquid forward, the ejector body having a vertical supply tube portion that sucks up liquid within the container body, and a trigger portion that is arranged to be movable rearward, and a trigger mechanism that causes liquid to flow from within the vertical supply tube portion toward the ejection hole side by moving the trigger portion rearward. A manufacturing method in which a foam-forming member having a foam-forming cylinder that is arranged in front of the ejection hole and surrounds the ejection hole from the outside in the nozzle radial direction is manufactured in advance before assembling the trigger-type liquid ejector, and after the foam-forming member is manufactured, it is determined whether or not to assemble the foam-forming member to the trigger-type liquid ejector, and a first locking portion is formed in the nozzle member, and the foam-forming member has an outside air introduction hole that introduces outside air into the inside of the foam-forming cylinder and a second locking portion that can be locked to the first locking portion.

[0013] A foam-forming member having a second engaging portion that can engage with the first engaging portion of the nozzle member is manufactured in advance before assembling the trigger-type liquid jet. After manufacturing the foam-forming member, it is determined whether or not to assemble the foam-forming member to the trigger-type liquid jet. Therefore, even if the nozzle member is the same, two types of trigger-type liquid jets with different liquid ejection patterns can be obtained, depending only on whether or not the foam-forming member is present. Since a foam-making member having a second locking portion that can lock with the first locking portion of the nozzle member is manufactured in advance before assembling the trigger type liquid jet, even if there are multiple types of nozzle members with different ejection patterns, as long as a first locking portion that can engage with the second locking portion is formed, it is possible to attach a foam-making member as needed.For example, by changing the combination of the type of nozzle member and the presence or absence of a foam-making member on the production line, a variety of trigger type liquid jets with different ejection patterns can be easily obtained, and a variety of trigger type liquid jets can be manufactured at low cost. Effect of the Invention

[0014] According to one aspect of the present invention, a variety of trigger type liquid ejectors with different ejection modes can be manufactured at reduced cost. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a vertical cross-sectional view of a trigger type liquid ejector shown as a first embodiment. [Diagram 2] FIG. 2 is a partially enlarged view of the trigger-type liquid ejector shown in FIG. [Diagram 3] FIG. 2 is a vertical cross-sectional view of the nozzle body shown in FIG. [Figure 4] 2 is a vertical cross-sectional view of the foam-generating member shown in FIG. 1. [Diagram 5] FIG. 11 is a vertical cross-sectional view of a trigger type liquid ejector shown as a second embodiment. [Figure 6] FIG. 6 is a partially enlarged view of the trigger type liquid ejector shown in FIG. 5. [Figure 7] FIG. 6 is a vertical cross-sectional view of the nozzle body shown in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a trigger type liquid ejector according to a first embodiment of the present invention will be described with reference to the drawings. 1, the trigger type liquid sprayer 1 according to this embodiment comprises a sprayer body 2 attached to a container body A containing a liquid, a nozzle member 3 attached to the sprayer body 2 and having a nozzle hole 4 for spraying the liquid, a biasing member 5, and a foam-forming member 6. Examples of liquids contained in the container body A include detergents for home use or dishes, deodorizers and fragrances for use in the air or on clothing, disinfectant alcohol, etc. Unless otherwise specified, each component part of the trigger-type liquid sprayer 1 is a molded product made of a synthetic resin such as an olefin resin such as polypropylene (PP) and polyethylene (PE), polyacetal (POM), or polyketone (POK).

[0017] The ejector main body 2 mainly includes a vertical supply tube portion 10 , a trigger mechanism 20 , an ejection tube portion 30 , a switching valve 40 , a pressure accumulating member 31 , and an elastic body 33 .

[0018] In the following description, the side of the container body A along the central axis O1 of the vertical supply tube portion 10 is referred to as the lower side, and the opposite side is referred to as the upper side, and the direction along the central axis O1 is referred to as the up-down direction. The direction intersecting the central axis O1 when viewed from the up-down direction is referred to as the radial direction, and the direction going around the central axis O1 when viewed from the up-down direction is referred to as the circumferential direction. In the radial direction, the side where the nozzle member 3 is provided with respect to the ejector main body 2 is referred to as the front side, and the opposite side is referred to as the rear side. In the radial direction, the direction perpendicular to the front-rear direction is referred to as the left-right direction.

[0019] The vertical supply tube section 10 is formed into a topped tube shape extending in the vertical direction, and sucks up the liquid inside the container body A. The vertical supply tube section 10 has a flange 11 that is placed on the upper opening edge of the mouth of the container body A via a packing. The flange 11 is pressed down from above by a cap 12 that is attached (screwed) to the mouth of the container body A. The upper part of a pipe 13 that extends in the vertical direction and sucks up the liquid from inside the container body A is fitted into the vertical supply tube section 10. A cylinder tube portion 14 is provided on the front side of the vertical supply tube portion 10. The cylinder tube portion 14 protrudes forward from the vertical supply tube portion 10 and opens forward.

[0020] The trigger mechanism 20 includes a trigger portion 21, a piston 22, and a cylinder 23. The trigger mechanism 20 causes the liquid to flow from inside the vertical supply tube portion 10 toward the nozzle hole 4 side by the rearward movement of the trigger portion 21.

[0021] The cylinder 23 is fitted and fixed in the cylinder tube portion 14. The cylinder 23 is formed in a bottomed tube shape that is open at the front and closed at the rear. A horizontal communication passage 18 is formed in the rear wall of the cylinder 23, which communicates between the inside of the cylinder 23 and the inside of the upper end portion of the vertical supply tube portion 10 in the front-rear direction. The trigger portion 21 is disposed in front of the vertical supply tube portion 10 so as to be movable rearward. The trigger portion 21 extends downward from both sides that sandwich in the left-right direction the connecting portion between the injection tube portion 30 and the nozzle member 3, and vertically straddles the front sides of the piston 22 and the cylinder 23. The upper end portion of the trigger portion 21 is supported so as to be rotatable about an axis that extends in the left-right direction. The piston 22 is fitted in the cylinder 23 so as to be movable back and forth. The piston 22 moves in the front-back direction in conjunction with the front-back movement of the trigger portion 21. The inside of the cylinder 23 is pressurized and depressurized in accordance with the front-back movement of the piston 22. The piston 22 is formed in a topped cylindrical shape that is open at the rear and closed at the front. The front end of the piston 22 is connected to the rear part of the trigger portion 21. The piston 22 moves backward and is pushed into the cylinder 23 as the trigger portion 21 moves backward.

[0022] The injection tube portion 30 is disposed above the cylinder tube portion 14 and extends forward from the upper end of the vertical supply tube portion 10. The injection tube portion 30 is integrally formed with the top wall 43 of the vertical supply tube portion 10. At the connecting portion between the injection tube portion 30 and the top wall 43 of the vertical supply tube portion 10, a vertical communication passage 19 is formed that vertically communicates the inside of the injection tube portion 30 with the inside of the upper end of the vertical supply tube portion 10. As shown in FIG. 2, a step portion 30a facing rearward is formed on the inner peripheral surface of the injection tube portion 30. The step portion 30a is provided in the middle portion of the injection tube portion 30 in the front-rear direction. The inner diameter of the front portion of the injection tube portion 30 is smaller than the inner diameter of the rear portion, and the step portion 30a is formed at the connecting portion between the inner peripheral surface of the front portion and the inner peripheral surface of the rear portion.

[0023] Closing portion 35 is fitted into the rear end of injection tube portion 30, closing the rear end opening of injection tube portion 30. Closing portion 35 is formed in a bottomed cylindrical shape that is open at the front and closed at the rear.

[0024] The pressure accumulating member 31 is disposed in the injection tube portion 30 so as to be movable back and forth, and blocks communication between the inside of the vertical supply tube portion 10 and the ejection holes 4 through the inside of the injection tube portion 30. The pressure accumulating member 31 moves rearward when the pressure inside the injection tube portion 30 increases, thereby connecting the inside of the vertical supply tube portion 10 to the ejection holes 4 through the inside of the injection tube portion 30. The pressure accumulating member 31 is formed in a rod shape extending in the front-rear direction. The intermediate portion 31a in the front-rear direction of the pressure accumulating member 31 is detachably fitted to a portion of the inner circumferential surface of the injection tube portion 30 that is connected forward to the step portion 30a. The intermediate portion 31a of the pressure accumulating member 31 extends substantially straight in the front-rear direction. The outer circumferential surface of the intermediate portion 31a of the pressure accumulating member 31 abuts over the entire circumference against a portion of the inner circumferential surface of the injection tube portion 30 that is connected forward to the step portion 30a. The intermediate portion 31a of the pressure accumulating member 31 is in surface contact with the inner circumferential surface of the injection tube portion 30. The front portion of the pressure accumulating member 31, which is located forward of the intermediate portion 31a, is inserted into the front portion of the injection tube portion 30 with a gap provided around the entire circumference, and the portion of the pressure accumulating member 31, which is located rearward of the intermediate portion 31a and forward of the rear end portion, is inserted into the rear portion of the injection tube portion 30 with a gap provided around the entire circumference.

[0025] The elastic body 33 biases the rearwardly moved pressure accumulating member 31 forward. The elastic body 33 protrudes forward from the rear end of the blocking portion 35 and is inserted into the injection tube portion 30. The front end of the elastic body 33 abuts against the rear end of the pressure accumulating member 31. When the pressure in the rear end of the injection tube portion 30 where the vertical communicating passage 19 opens reaches a predetermined value or more, the pressure accumulating member 31 moves rearward while elastically deforming the elastic body 33, so that the middle portion 31a of the pressure accumulating member 31 moves rearward from the portion of the inner circumferential surface of the injection tube portion 30 that is connected forward to the step portion 30a, and the vertical supply tube portion 10 and the ejection hole 4 communicate with each other through the injection tube portion 30.

[0026] An auxiliary elastic body 32 is provided between the blocking portion 35 and the pressure accumulating member 31 to surround the elastic body 33 from the radial outside. The auxiliary elastic body 32 is a metallic coil spring extending in the front-rear direction. The front end of the auxiliary elastic body 32 abuts against the rear end of the pressure accumulating member 31, and the rear end of the auxiliary elastic body 32 abuts against the rear end of the blocking portion 35.

[0027] The switching valve 40 is provided inside the vertical supply tube section 10. The switching valve 40 switches between communication between the inside of the vertical supply tube section 10 and the inside of the cylinder 23 through the horizontal communication passage 18 and between communication and blocking, depending on the pressure increase and decrease in the cylinder 23. The switching valve 40 is a ball valve, and is formed, for example, of a material having a higher specific gravity than the liquid in the container body A. The switching valve 40 is disposed on a valve seat 41 formed on the inner peripheral surface of the vertical supply tube section 10 so as to be able to move upward. The valve seat 41 is formed in an annular shape and is disposed coaxially with the central axis O1. The valve seat 41 extends downward from the inner peripheral surface of the vertical supply tube section 10 toward the inside in the radial direction. The switching valve 40 and the valve seat 41 are located below the horizontal communication passage 18.

[0028] In the illustrated example, a plurality of elastic protrusions 44 protruding downward are formed on the lower surface of the top wall 43 of the vertical supply tube portion 10. The elastic protrusions 44 are provided at intervals in the circumferential direction. When the switching valve 40 moves upward away from the valve seat 41, the elastic protrusions 44 are elastically deformed radially outward, thereby expanding the space surrounded by the elastic protrusions 44.

[0029] Nozzle member 3 comprises a relay member 3a attached to the front end of injection tube portion 30, and a nozzle main body 3b rotatably attached to relay member 3a while being prevented from slipping out forward.

[0030] The relay member 3a is formed in a cylindrical shape extending in the front-rear direction. The front part of the injection tube portion 30 is fitted into the rear part of the relay member 3a. The front part of the relay member 3a protrudes forward from the injection tube portion 30. A connecting shaft 25 extending in the front-rear direction and formed integrally with the relay member 3a is provided in the front part of the relay member 3a. As shown in Figures 1 and 3, the nozzle main body 3b includes a nozzle outer tube 51 rotatably fitted to the front part of the relay member 3a, a nozzle inner tube 52 rotatably fitted to the connecting shaft 25, and a nozzle cap 50 formed in a topped cylindrical shape with a closed front end.

[0031] The nozzle outer cylinder 51, the nozzle inner cylinder 52, the nozzle cap 50, the connecting shaft 25, and the ejection hole 4 are arranged coaxially with a common axis extending in the front-rear direction. Hereinafter, this common axis will be referred to as the nozzle axis O2, the direction intersecting the nozzle axis O2 as viewed from the front-rear direction will be referred to as the nozzle radial direction, and the direction going around the nozzle axis O2 as viewed from the front-rear direction will be referred to as the nozzle circumferential direction.

[0032] The front part of the relay member 3a is fitted into the rear part of the nozzle outer cylinder 51 so as to be relatively rotatable in the nozzle circumferential direction. The front part of the nozzle outer cylinder 51 protrudes forward from the relay member 3a. A first engagement part 53 having a recessed shape is formed on the outer peripheral surface of the front part of the nozzle outer cylinder 51 and extends continuously around the entire circumference. The connecting shaft 25 is fitted in a rear portion of the nozzle inner cylinder 52 so as to be relatively rotatable in the nozzle circumferential direction. The nozzle cap 50 is fitted into the front part of the nozzle inner cylinder 52. The nozzle cap 50 has an ejection hole 4 formed at the front end thereof for ejecting liquid forward. A spin flow path 37 is provided inside the nozzle cap 50, and the liquid from inside the injection cylinder portion 30 passes through the spin flow path 37 and is ejected while swirling in the nozzle circumferential direction. A first switching groove and a second switching groove are formed on the inner peripheral surface of the rear part of the nozzle inner cylinder 52 and on the outer peripheral surface of the connecting shaft 25. The first switching groove and the second switching groove are connected to each other to connect the inside of the injection cylinder portion 30 to the spin flow path 37. As the nozzle body 3b rotates relative to the relay member 3a, the first switching groove and the second switching groove are switched between connected and disconnected.

[0033] The biasing member 5 biases the trigger portion 21 forward when it has moved rearward. The biasing members 5 are provided on both sides of the ejector body 2 in the left-right direction. The biasing member 5 elastically deforms when the trigger portion 21 moves rearward. The biasing member 5 biases the trigger portion 21 forward before the trigger portion 21 moves rearward. The biasing member 5 may only elastically deform and bias the trigger portion 21 forward when the trigger portion 21 moves rearward. The biasing member 5 is formed in a plate shape extending in the front-rear direction and with the front and back surfaces facing the left-right direction. The front end of the biasing member 5 abuts against the trigger portion 21 from the rear of the trigger portion 21. The front end of the biasing member 5 abuts against both ends of the trigger portion 21 in the left-right direction. The rear portion of the urging member 5 extends straight in the front-rear direction. The front portion of the urging member 5 extends downward as it moves forward.

[0034] The rear ends of the pair of biasing members 5 are connected in the left-right direction by a blocking portion 35. The vertical centers of the blocking portion 35 and the rear ends of the biasing members 5 are substantially aligned with each other. The biasing members 5, blocking portion 35, and elastic body 33 are integrally formed from a resin material such as an olefin resin such as polypropylene (PP), polyacetal (POM), or polyketone (POK). The biasing members 5, blocking portion 35, and elastic body 33 are formed from the same material.

[0035] As shown in Figures 1 and 4, the foam-forming member 6 is disposed in front of the nozzle hole 4 and has a foam-forming tube 55 that surrounds the nozzle hole 4 from the outside in the nozzle radial direction. The foam-forming tube 55 is formed with an outside air introduction hole 55a that introduces outside air into the inside. The rear end opening edge of the foam-forming tube 55 abuts against the front end opening edge of the nozzle inner tube 52. The outside air introduction hole 55a is formed at the rear end of the foam-forming tube 55. The foam-forming member 6 has an outer shell tube 57 that surrounds the foam-forming tube 55 from the outside in the nozzle radial direction. The outer shell tube 57 is fitted onto the nozzle outer tube 51. The front end of the outer shell tube 57 is located forward of the foam-forming tube 55, and the rear end of the outer shell tube 57 is located rearward of the foam-forming tube 55. The outer shell tube 57 is formed with a second locking portion 56 that is locked to the first locking portion 53 of the nozzle member 3. The second locking portion 56 is formed on the inner peripheral surface of the outer shell tube 57 and is formed in a ridge shape that extends continuously around the entire circumference.

[0036] The trigger-type liquid sprayer 1 is manufactured in advance with the sprayer body 2, nozzle member 3, biasing member 5, and foam-generating member 6 all assembled in order except for the foam-generating member 6. A decision is then made as to whether or not to assemble the foam-generating member 6, and, if necessary, the second locking portion 56 of the outer tube 57 of the foam-generating member 6 is locked to the first locking portion 53 of the nozzle member 3.

[0037] Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described. Note that it is assumed that each part of the trigger type liquid ejector 1 is filled with liquid.

[0038] When the trigger portion 21 is pulled backward, the front portion of the biasing member 5 bends backward around the connection portion with the rear portion, the piston 22 moves backward, and pressure is applied inside the cylinder 23. At this time, the liquid inside the cylinder 23 flows into the upper end portion of the vertical supply tube portion 10 through the horizontal communicating passage 18, and the switching valve 40 is pressed against the valve seat 41 by this liquid, so that communication between the inside of the cylinder 23 and the inside of the container body A through the horizontal communicating passage 18 is blocked. As a result, the liquid that flows into the upper end of the vertical supply tube section 10 is supplied into the rear end of the injection tube section 30 through the vertical connecting passage 19, and when the internal pressure in this section rises and reaches or exceeds a predetermined value, the pressure accumulating member 31 moves rearward while elastically deforming the elastic body 33 and the auxiliary elastic body 32, thereby connecting the inside of the vertical supply tube section 10 to the ejection hole 4 through the inside of the injection tube section 30 and the spin flow path 37, and the liquid is ejected from the ejection hole 4 into the foam-forming tube 55 while swirling around the nozzle.

[0039] At this time, the pressure inside the foam-forming cylinder 55 becomes negative, outside air (air) is introduced into the foam-forming cylinder 55 through the outside air introduction hole 55a, and the liquid is mixed with the outside air inside the foam-forming cylinder 55 and foams into bubbles, which are then ejected from the front end opening of the foam-forming cylinder 55. The liquid ejected from the ejection hole 4 into the foam-forming cylinder 55 is in the form of a mist, and for example, this mist of liquid collides with the inner peripheral surface of the foam-forming cylinder 55 inside the foam-forming cylinder 55, disturbing the flow of the liquid, which is mixed with the outside air and turns into bubbles.

[0040] Thereafter, when the trigger portion 21 is restored forward by the biasing member 5, the piston 22 is restored forward in the cylinder 23 in conjunction with the trigger portion 21. At this time, the pressure inside the cylinder 23 is reduced, and the pressure becomes lower than the pressure inside the container body A, and the switching valve 40 moves upward away from the valve seat 41. As a result, the liquid inside the container body A is supplied into the cylinder 23 through the vertical supply tube portion 10 and the horizontal connecting passage 18. Here, the switching valve 40, which has moved upward away from the valve seat 41, expands the space surrounded by the multiple elastic protrusions 44 while elastically deforming the multiple elastic protrusions 44 radially outward. When the reduced pressure in the cylinder 23 is released, the elastic protrusions 44, which have been elastically deformed by contact with the switching valve 40, return to their original shape, and the switching valve 40 is pushed back downward. As a result, the switching valve 40 is biased downward and seats on the valve seat 41 without sticking to the inner surface of the vertical supply tube portion 10.

[0041] As described above, according to the trigger-type liquid sprayer 1 of this embodiment, the foam-forming member 6 is formed with a second locking portion 56 that is locked to the first locking portion 53 formed on the nozzle member 3. Therefore, even if the nozzle member 3 is the same, two types of trigger-type liquid sprayers 1 with different liquid ejection patterns can be obtained, depending only on the presence or absence of the foam-forming member 6.

[0042] Since the first locking portion 53 is formed on the nozzle member 3 and the second locking portion 56 is formed on the foam-forming member 6, it is possible to attach the foam-forming member 6 to multiple types of nozzle members 3 with different ejection patterns (for example, the nozzle body 3b in Figure 3 and the nozzle body 3b in Figure 7 described below) by forming the first locking portion 53 that can engage with the second locking portion 56.For example, by changing the combination of the type of nozzle member 3 and the presence or absence of the foam-forming member 6 on a production line, a variety of trigger-type liquid jets 1 with different ejection patterns can be easily obtained, and a variety of trigger-type liquid jets 1 can be manufactured at low cost.

[0043] Since a pressure accumulation member 31 and an elastic body 33 are provided, when the pressure inside the injection tube portion 30 reaches or exceeds a predetermined value, it becomes possible to connect the inside of the vertical supply tube portion 10 to the injection hole 4 through the injection tube portion 30, and the liquid can be stably ejected in the desired manner. Since the pressure accumulating member 31 is disposed within the injection tube portion 30, when the pressure accumulating member 31 blocks communication between the inside of the vertical supply tube portion 10 and the injection hole 4 through the injection tube portion 30, it is possible to select at the time of design either a configuration in which the pressure accumulating member 31 abuts against the inner surface of the injection tube portion 30 in the radial direction, or a configuration in which the pressure accumulating member 31 abuts against the inner surface of the injection tube portion 30 in the front-to-rear direction, and a variety of trigger-type liquid ejectors 1 with different ejection patterns can be easily obtained.

[0044] Since the pressure accumulator member 31 is provided inside the injection tube portion 30, the nozzle member 3 can be made smaller and the structure can be simplified, compared to when the pressure accumulator member 31 is provided inside the nozzle member 3. Since the pressure accumulator 31 is provided inside the injection tube portion 30, the internal volume of the injection tube portion 30 can be reduced without increasing the number of parts. This allows the pressure inside the injection tube portion 30 to be increased quickly when the trigger portion 21 is operated, making it possible to reduce the number of priming operations. Furthermore, by reducing the internal volume of the injection tube portion 30, air is less likely to remain inside the injection tube portion 30, making it possible to suppress variations in the amount of ejection and dripping from the ejection hole 4 caused by remaining air.

[0045] Since the biasing member 5, the blocking portion 35, and the elastic body 33 are integrally formed from a resin material, an increase in the number of parts can be suppressed.

[0046] According to the manufacturing method of the trigger type liquid jet 1 of this embodiment, a foam-forming member 6 having a second locking portion 56 that can be locked to the first locking portion 53 of the nozzle member 3 is manufactured in advance before assembling the trigger type liquid jet, and after the foam-forming member 6 is manufactured, it is determined whether or not to assemble the foam-forming member 6 to the trigger type liquid jet 1.Therefore, even if the nozzle member 3 is the same, two types of trigger type liquid jets 1 with different liquid ejection patterns can be obtained, depending only on the presence or absence of the foam-forming member 6. Since the foam-forming member 6 having the second locking portion 56 that can be locked with the first locking portion 53 of the nozzle member 3 is manufactured in advance before assembling the trigger type liquid jet, it is possible to attach the foam-forming member 6 as needed, even for multiple types of nozzle members 3 with different ejection patterns (for example, the nozzle body 3b in Figure 3 and the nozzle body 3b in Figure 7 described below), as long as the first locking portion 53 that can engage with the second locking portion 56 is formed.For example, by changing the combination of the type of nozzle member 3 and the presence or absence of the foam-forming member 6 on the production line, a variety of trigger type liquid jets 1 with different ejection patterns can be easily obtained, and a variety of trigger type liquid jets 1 can be manufactured at low cost.

[0047] Next, a trigger type liquid ejector 100 according to a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted, with only the differences being described.

[0048] In the trigger-type liquid ejector 100 of this embodiment, the outer diameter of the middle portion 31a of the pressure accumulating member 31 becomes smaller toward the front. The middle portion 31a of the pressure accumulating member 31 abuts against the inner peripheral edge of the step portion 30a on the inner peripheral surface of the projection tube portion 30 in the front-rear direction over the entire circumference. The middle portion 31a of the pressure accumulating member 31 is in substantially line contact with the inner peripheral surface of the projection tube portion 30. When the pressure in the rear end of the injection tube section 30, where the vertical communicating passage 19 opens, reaches or exceeds a predetermined value, the pressure accumulating member 31 moves rearward while elastically deforming the elastic body 33, whereby the middle portion 31a of the pressure accumulating member 31 moves rearward away from the inner peripheral edge of the step portion 30a on the inner peripheral surface of the injection tube section 30, and the interior of the vertical supply tube section 10 communicates with the ejection hole 4 through the injection tube section 30. In this embodiment, an auxiliary elastic body 32 is not provided.

[0049] The nozzle body 3b is formed in a topped cylindrical shape with a closed front and includes a nozzle top wall 61 with the front and back surfaces facing the front-rear direction, and a nozzle outer cylinder 51 extending rearward from the outer periphery of the nozzle top wall 61. The nozzle body 3b does not include a nozzle cap 50. The front part of the relay member 3a is relatively rotatably fitted into the nozzle outer cylinder 51. A first engagement part 53 having a recessed shape is formed on the outer circumferential surface of the front end part of the nozzle outer cylinder 51 and extends continuously around the entire circumference. A nozzle inner cylinder 52 extending rearward is formed in the nozzle top wall 61. The nozzle inner cylinder 52 is surrounded by the nozzle outer cylinder 51 from the outside in the nozzle radial direction. The connecting shaft 25 is fitted into the nozzle inner cylinder 52 so as to be relatively rotatable. The nozzle top wall 61 is formed with an ejection hole 4 that ejects liquid forward. The rear end opening edge of the foam generating cylinder 55 abuts against the front surface of the nozzle top wall 61. A spin flow path 37, in which the ejection hole 4 opens, is provided between the rear surface of the nozzle top wall 61 and the front end surface of the connecting shaft 25. A first switching groove and a second switching groove that communicate with each other to connect the inside of the injection tube 30 to the spin flow path 37 are formed on the inner peripheral surface of the nozzle inner tube 52 and the outer peripheral surface of the connecting shaft 25. As the nozzle body 3b rotates relative to the relay member 3a, the first switching groove and the second switching groove are switched between communication and disconnection.

[0050] As described above, the trigger type liquid ejector 100 according to this embodiment has the same effects as the first embodiment.

[0051] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0052] For example, the pressure accumulating member 31, the elastic body 33, and the elastic protrusion 44 may not be provided.

[0053] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0054] 1, 100 Trigger-type liquid ejector 2 Squirt body 3 Nozzle material 4 Spout hole 5. Pressing member 6 Foam-forming material 10 Vertical supply tube 20 Trigger Mechanism 21 Trigger section 30 Injection cylinder part 31 Pressure storage member 33 Elastic Body 35 Occlusion 53 First locking part 55 Foam cylinder 55a Outside air intake 56 Second locking part A Container body

Claims

1. An ejector body that is attached to a container that contains a liquid; a nozzle member attached to the ejector body and having an ejection hole for ejecting liquid forward; a foaming member disposed in front of the ejection hole and having a foaming tube surrounding the ejection hole from the outside in the nozzle radial direction, The ejector body includes: A vertical supply tube portion that sucks up the liquid in the container body; a trigger mechanism having a trigger portion arranged movably rearward, the trigger portion moving rearward to cause liquid to flow from inside the vertical supply tube portion toward the nozzle hole, The nozzle member is formed with a first engaging portion, The foam-forming member includes: An outside air introduction hole for introducing outside air into the inside of the bubble-forming cylinder; A second engaging portion engaged with the first engaging portion is formed.

2. The ejector body includes: an injection tube portion extending forward from the vertical supply tube portion; a pressure accumulation member that is disposed in the injection tube portion so as to be movable forward and backward and that blocks communication between the vertical supply tube portion and the injection hole through the injection tube portion; an elastic body that biases the pressure accumulating member that has moved rearward toward the front, 2. The trigger type liquid ejector according to claim 1, wherein the pressure accumulating member moves rearward when pressure in the ejection tube portion increases, thereby connecting the interior of the vertical supply tube portion to the ejection hole through the interior of the ejection tube portion.

3. The injection tube portion extends forward from an upper end portion of the vertical supply tube portion, A biasing member that biases the trigger portion that has moved rearward toward the front; a closing portion that closes a rear end opening of the injection tube portion, The biasing members are provided on both sides of the ejector body in the left-right direction, The elastic body protrudes forward from the closing portion and is inserted into the injection tube portion, 3. The trigger type liquid ejector according to claim 2, wherein the biasing member, the blocking portion, and the elastic body are integrally formed from a resin material.

4. An ejector body that is attached to a container that contains a liquid; a nozzle member attached to the ejector body and having an ejection hole for ejecting liquid forward; The ejector body includes: A vertical supply tube portion that sucks up the liquid in the container body; a trigger mechanism having a trigger portion arranged to be movable rearward, the trigger portion moving rearward to cause liquid to flow from inside the vertical supply tube portion toward the ejection hole, the method comprising: A foam-forming member is disposed in front of the ejection hole and has a foam-forming tube surrounding the ejection hole from the outside in the nozzle radial direction, and is manufactured in advance of assembling the trigger-type liquid ejector. After manufacturing the foam-forming member, it is determined whether or not to assemble the foam-forming member to the trigger-type liquid ejector. The nozzle member is formed with a first engaging portion, The foam-forming member includes: An outside air introduction hole for introducing outside air into the inside of the bubble-forming cylinder; A second engaging portion capable of being engaged with the first engaging portion is formed.

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