Trigger-type liquid sprayer

Abstract

To prevent a locking tube of an inner member from coming off from a fixed tube of an outer member when a trigger-type liquid ejector is dropped. [Solution] The first flange portion 11 protrudes radially outward from a portion of the inner tube 10a that is located below the outer tube 10b, and is positioned on the upper opening edge of the mouth of the container body A, the locking tube 52 protrudes upward from the first flange portion and is inserted into the fixed tube 51, the second flange portion 12 protrudes radially outward from the outer tube and is located above the first flange portion, the fixed tube protrudes downward from the second flange portion and is provided with a first locking projection 53 that protrudes upward from the rear end of the locking tube and penetrates the second flange portion in the vertical direction, and the upper end of the first locking projection that protrudes upward from the second flange portion is formed with a first locking protrusion 53a that protrudes rearward and has a lower end surface that abuts or is close to the upper surface of the second flange portion.

Description

[Technical Field]

[0001] The present invention relates to a trigger-type liquid ejector. [Background technology]

[0002] Conventionally, a trigger-type liquid ejector has been known in which the ejector body comprises a vertical supply tube section that sucks up liquid from within the container body, and a trigger mechanism that has a trigger section arranged so as to be movable rearward, and that causes the liquid to flow from within the vertical supply tube section toward the ejection hole side of the nozzle member by moving the trigger section rearward, the vertical supply tube section being composed of an inner tube that communicates with the inside of the container body and an outer tube that is fitted onto the inner tube, and the ejector body comprises an outer member that has the outer tube and a fixed tube, and an inner member that has a locking tube inserted into the inner tube and the fixed tube and is fixed to the container body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-140820 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, the nozzle member is arranged in a state where it protrudes forward from the ejector body, and when the trigger-type liquid ejector is dropped and an external force is applied to the nozzle member in the vertical direction, there is a risk that the locking tube of the inner member will come off from the fixed tube of the outer member. For example, if the outer and inner components are made lighter in consideration of the environment, or if the inner component is made of PP, PE, etc. instead of POM (polyacetal), which has a relatively high rigidity, there is a risk that the locking tube will be damaged when the trigger-type liquid sprayer is dropped, or that the locking tube will be more likely to come off from inside the fixed tube.

[0005] The present invention provides a trigger-type liquid ejector that can prevent the locking tube of the inner member from coming off the fixed tube of the outer member when the trigger-type liquid ejector is dropped. [Means for solving the problem]

[0006] A trigger-type liquid ejector according to one aspect of the present invention comprises a ejector body attached to a container body containing liquid, and a nozzle member attached to the front end of the ejector body and having an ejection hole formed therein for ejecting liquid forward, the ejector body comprising a vertical supply tube section that sucks up liquid from within the container body, and a trigger mechanism having a trigger section arranged movably rearward, the trigger section moving rearward to cause liquid to flow from within the vertical supply tube section towards the ejection hole, the vertical supply tube section being composed of an inner tube that communicates with the interior of the container body, and an outer tube fitted to the inner tube, the ejector body comprising the inner tube, a first flange section, and a locking tube, and an inner member fixed to the container body, and an outer tube having the outer tube, a second flange section, and a fixing tube the first flange portion protrudes radially outward from a portion of the inner tube that is located below the outer tube and is positioned on the upper opening edge of the mouth of the container body; the locking tube protrudes upward from the first flange portion and is inserted into the fixed tube; the second flange portion protrudes radially outward from the outer tube and is located above the first flange portion; the fixed tube protrudes downward from the second flange portion and is provided with a first locking projection that protrudes upward from the rear end of the locking tube and penetrates the second flange portion in the vertical direction; and the upper end of the first locking projection that protrudes upward from the second flange portion is formed with a first locking protrusion that protrudes rearward and has a lower end surface that abuts or is close to the upper surface of the second flange portion.

[0007] A first locking projection is provided that protrudes upward from the rear end of the locking tube and penetrates the second flange portion in the vertical direction, and a first locking protrusion is formed at the upper end of the first locking projection that protrudes upward from the second flange portion, and whose lower end surface abuts or is close to the upper surface of the second flange portion. Therefore, when the trigger-type liquid ejector is dropped, and the external force transmitted from the nozzle member to the outer member causes the locking tube to attempt to detach from within the fixed tube, the lower end surface of the first locking protrusion will abut against the upper surface of the second flange portion, and in combination with the fact that the first locking protrusion is provided at the rear end of the locking tube, this effectively prevents the locking tube from detaching from within the fixed tube and also prevents damage to the locking tube.

[0008] The fixed tube may have a first fixing hole that opens radially, and a second locking protrusion that protrudes rearward and abuts or is close to the inner surface of the first fixing hole may be provided on the outer surface of the rear end of the locking tube.

[0009] A second locking protrusion is provided on the outer surface of the rear end of the locking tube, protruding rearward and abutting or close to the inner surface of the first fixing hole of the fixed tube.Therefore, the rear end of the locking tube is locked to the outer member at two points in the upper and lower directions by the first and second locking protrusions, thereby reliably preventing the locking tube from coming off from within the fixed tube.

[0010] The second locking projection may be connected to the outer circumferential surface of the locking tube over the entire length in the vertical direction.

[0011] Since the second locking protrusion is connected to the outer surface of the locking tube along its entire vertical length, when the second locking protrusion abuts the inner surface of the first fixing hole, the fixed tube and the locking tube are prevented from rattling in the vertical direction, and the locking tube is reliably prevented from coming off from within the fixed tube.

[0012] The fixed tube has a second fixing hole that opens radially, and the outer surface of the locking tube has a second locking protrusion that extends in a direction that intersects the radial direction as it moves radially outward, and the tip edge of the second locking protrusion may abut or be close to the inner surface of the second fixing hole with a radial gap provided between it and the outer surface of the locking tube.

[0013] A second fixing hole that opens radially is formed in the fixing tube, and a second locking protrusion that extends radially outward in a direction that intersects the radial direction as it moves radially outward is provided on the outer surface of the locking tube, and the tip edge of the second locking protrusion abuts or is close to the inner surface of the second fixing hole with a radial gap provided between it and the outer surface of the locking tube. Therefore, when the trigger-type liquid ejector is dropped and the external force transmitted from the nozzle member to the outer member causes the locking tube to attempt to come out from inside the fixed tube, the tip edge of the second locking protrusion abuts against the inner surface of the second fixing hole, applying a compressive force to the second locking protrusion, thereby preventing the locking tube from coming out from inside the fixed tube.

[0014] The second locking projection may extend downward from the outer circumferential surface of the locking tube toward the outside in the radial direction.

[0015] Since the second locking projection extends downward as it moves radially outward from the outer surface of the locking tube, when the trigger-type liquid sprayer is dropped and the locking tube attempts to come out of the fixed tube, the tip edge of the second locking projection abuts against the inner surface of the second fixing hole in the vertical direction, applying a vertical compressive force to the second locking projection, thereby reliably preventing the locking tube from coming out of the fixed tube. [Effects of the Invention]

[0016] According to one aspect of the present invention, it is possible to prevent the locking tube of the inner member from coming off from the fixed tube of the outer member when the trigger-type liquid ejector is dropped. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a vertical cross-sectional view of a trigger-type liquid ejector according to an embodiment, taken along the vertical and front-rear directions. [Figure 2] 1 is a front view, including a partial cross section, of a trigger-type liquid ejector according to an embodiment. FIG. [Figure 3] FIG. 3 is a perspective view of the inner member shown in FIGS. 1 and 2. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A trigger-type liquid ejector according to an embodiment of the present invention will be described below with reference to the drawings. 1, the trigger-type liquid sprayer 1 according to this embodiment comprises a sprayer body 2 that is attached to a container body A that contains a liquid, a nozzle member 3 that is attached to the sprayer body 2 and has ejection holes 4 formed therein for ejecting the liquid, and a biasing member 5. Examples of liquids that can be stored in the container body A include household or dish detergents, deodorizers and air fresheners for use in spaces or on clothing, disinfectant alcohol, etc. Unless otherwise specified, each component part of the trigger-type liquid ejector 1 is a molded product made of an olefin-based resin such as polypropylene (PP) and polyethylene (PE), or a synthetic resin such as polyketone (POK).

[0019] The ejector main body 2 mainly includes a vertical supply tube portion 10 , a trigger mechanism 20 , an injection tube portion 30 , a switching valve 40 , a pressure accumulating member 31 , and an elastic body 33 .

[0020] 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 circumferential 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 on which the nozzle member 3 is provided with respect to the ejector 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-to-rear direction is referred to as the left-to-right direction. The central axis O1 is located rearward of and extends parallel to the central axis O2 of the mouth of the container body A.

[0021] The vertical supply tube 10 is formed in a topped cylindrical shape that extends vertically and sucks up liquid inside the container body A. The vertical supply tube 10 has a first flange 11 that is placed on the upper opening edge of the mouth of the container body A via a packing. The first flange 11 is pressed down from above by a cap C that is attached (screwed) to the mouth of the container body A. The upper part of a pipe 13 that extends vertically and sucks up liquid from inside the container body A is fitted inside the vertical supply tube 10. A cylinder tube portion 14 is provided on the front side of the vertical supply tube portion 10. The cylinder tube portion 14 is disposed above the first flange portion 11, protrudes forward from the vertical supply tube portion 10, and is open forward.

[0022] The vertical supply tube portion 10 is composed of an inner tube 10a that communicates with the inside of the container body A, and an outer tube 10b that is fitted around the inner tube 10a. The inner cylinder 10a protrudes downward from the lower end opening of the outer cylinder 10b, and the lower end of the inner cylinder 10a is located below the outer cylinder 10b. The upper part of the pipe 13 is fitted into the inner cylinder 10a. The cylinder portion 14 protrudes forward from the outer peripheral surface of the outer cylinder 10b.

[0023] A second flange portion 12 that protrudes radially outward is formed at the lower end of the outer cylinder 10b. The front end of the second flange portion 12 is integrally formed with the rear end of the lower end of the cylinder portion 14. The second flange portion 12 is located above the first flange portion 11. The second flange portion 12 is formed with a fixed barrel 51 and a fitting barrel 54. The fixed barrel 51 and the fitting barrel 54 protrude downward from the second flange portion 12. The fixed barrel 51 and the fitting barrel 54 are arranged coaxially with the central axis O2 of the opening of the container body A. The fixed barrel 51 surrounds the outer barrel 10b from the outside in the radial direction when viewed from the top and bottom. The fitting barrel 54 is arranged radially inside the fixed barrel 51.

[0024] The first flange portion 11 protrudes radially outward from the lower end of the inner cylinder 10a and is located lower than the second flange portion 12. The first flange portion 11 has a locking cylinder 52 that extends upward and is inserted into the fixed cylinder 51. A fitting cylinder 54 is tightly fitted into the locking cylinder 52. The locking cylinder 52 and the first flange portion 11 are arranged coaxially with the central axis O2 of the opening of the container body A.

[0025] A first locking projection 53 is provided, projecting upward from the rear end of the locking tube 52 and penetrating the second flange portion 12 in the vertical direction. The first locking projection 53 is provided on the upper opening edge of the rear end of the locking tube 52. The thickness of the first locking projection 53 is thinner than the thickness of the locking tube 52. A through hole 12a is formed in the rear end of the second flange portion 12, penetrating it in the vertical direction, and the first locking projection 53 is inserted into this through hole 12a. The through hole 12a is an elongated hole extending in the left-right direction, and the first locking projection 53 has a rectangular shape that is long in the left-right direction when viewed from the rear. Of the inner surface of the through hole 12a, the surface located at the rear end and facing forward extends forward as it extends upward. Of the inner surface of the through hole 12a, both ends in the front-to-rear direction at the upper end abut against or are close to the first locking projection 53.

[0026] The first locking projection 53a is formed at the upper end of the first locking projection 53 that projects upward from the second flange portion 12. The first locking projection 53a projects rearward and has a lower end surface that abuts or is close to the upper surface of the second flange portion 12. The first locking projection 53a is connected to the outer peripheral surface of the first locking projection 53 over the entire length in the up-down direction. The first locking projection 53a is provided over the entire length in the left-right direction of the first locking projection 53. The first locking projection 53a is formed in the shape of a rectangular parallelepiped extending in the left-right direction. The first locking projection 53a has a lower end surface that faces downward over the entire length in the left-right direction. The outer peripheral surface of the first locking projection 53a extends forward as it extends upward.

[0027] A first fixing hole 51b that opens in the radial direction is formed in the fixed barrel 51. The first fixing hole 51b penetrates the fixed barrel 51 in the radial direction. The first fixing hole 51b is an elongated hole that extends in the circumferential direction. The inner diameter of the lower end of the fixed barrel 51 becomes smaller as it goes upward. As shown in FIGS. 1 and 3, the outer peripheral surface of the locking tube 52 is provided with a second locking protrusion 52b that protrudes radially outward and abuts or is close to the lower end surface of the inner surface of the first fixing hole 51b, which is located at the lower end and faces upward. The second locking protrusion 52b is connected to the outer peripheral surface of the locking tube 52 along its entire length in the up-down direction. The second locking protrusion 52b is formed in the shape of a rectangular parallelepiped extending in the circumferential direction. The second locking protrusion 52b has a lower end surface that faces downward along its entire length in the circumferential direction. The lower end surface of the second locking protrusion 52b abuts or is close to the lower end surface of the inner surface of the first fixing hole 51b. The second locking protrusion 52b is located radially inward from the outer peripheral surface of the fixing tube 51. The diameter of the outer peripheral surface of the upper part of the second locking protrusion 52b decreases upward.

[0028] 2, a second fixing hole 51a that opens in the radial direction is formed in the fixed barrel 51. The second fixing hole 51a passes through the fixed barrel 51 in the radial direction. The second fixing hole 51a is an elongated hole that extends in the circumferential direction. 2 and 3, second locking projections 52a are provided on the outer circumferential surface of the locking tube 52. The second locking projections 52a extend radially outward in a direction intersecting the radial direction. The tip edges of the second locking projections 52a abut against or are close to the inner surface of the second fixing hole 51a, with a radial gap provided between the second locking projections 52a and the outer circumferential surface of the locking tube 52.

[0029] In the illustrated example, the second locking projection 52a extends downward from the outer circumferential surface of the locking tube 52 radially outward, and the tip edge of the second locking projection 52a abuts or is close to the lower end surface of the inner surface of the second fixing hole 51a, which is located at the lower end and faces upward. A gap is provided in the vertical direction between the tip edge of the second locking projection 52a and the lower end surface of the inner surface of the second fixing hole 51a. Here, the lower end surface of second locking projection 52b abuts against the lower end surface of the inner surface of first fixing hole 51b, or is spaced a distance smaller than the gap between the tip edge of second locking projection 52a and the lower end surface of the inner surface of second fixing hole 51a. Note that the tip edge of second locking projection 52a may abut against the lower end surface of the inner surface of second fixing hole 51a.

[0030] The entire second locking projection 52a, except for its upper end, is spaced radially outward from the outer circumferential surface of the locking tube 52. The second locking projection 52a is formed like a cantilevered leaf spring, with its upper end being a fixed end connected to the outer circumferential surface of the locking tube 52 and its lower end being a free end. The front and back surfaces of the second locking projection 52a face radially inward. The second locking projection 52a is located radially inward from the outer circumferential surface of the fixed tube 51.

[0031] The second fixing holes 51 a and second locking projections 52 a, and the first fixing holes 51 b and second locking projections 52 b are alternately provided at intervals in the circumferential direction. The circumferential size of the second fixing holes 51 a and second locking projections 52 a is smaller than the circumferential size of the first fixing holes 51 b and second locking projections 52 b. The second fixing holes 51a are formed at both left-right ends of the fixed barrel 51, and the second locking projections 52a are formed at both left-right ends of the locking barrel 52. The first fixing holes 51b are formed at both front-rear ends of the fixed barrel 51, and the second locking projections 52b are formed at both front-rear ends of the locking barrel 52. The second fixing holes 51a, second locking projections 52a, first fixing holes 51b, and second locking projections 52b are all positioned in the same up-down direction.

[0032] The left-right centers of the locking tube 52, the fixed tube 51, the second locking protrusion 52b located at the rear end of the locking tube 52, the first fixing hole 51b located at the rear end of the fixed tube 51, the through-hole 12a, and the first locking projection 53 are aligned with one another. The left-right sizes of the first locking projection 53 and the second locking protrusion 52b located at the rear end of the locking tube 52 are the same.

[0033] 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 holes 4 by rearward movement of the trigger portion 21.

[0034] The cylinder 23 is fitted and fixed in the cylinder tubular portion 14. The cylinder 23 is formed in a horizontally oriented, bottomed tubular 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, connecting the interior of the cylinder 23 to the interior of the upper end of the vertical supply tubular 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 of the connecting portion between the injection tube portion 30 and the nozzle member 3 in the left-right direction, and straddles the front sides of the piston 22 and the cylinder 23 in the up-down direction. The upper end portion of the trigger portion 21 is supported so as to be rotatable about an axis extending in the left-right direction. The piston 22 is fitted into the cylinder 23 so as to be movable back and forth. The piston 22 moves back and forth in conjunction with the back and forth movement of the trigger portion 21. The interior of the cylinder 23 is pressurized and depressurized as the piston 22 moves back and forth. The piston 22 is formed in a horizontally facing, 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.

[0035] 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 formed integrally with the top wall 43 of the vertical supply tube portion 10. A vertical communication passage 19 is formed at the connection between the injection tube portion 30 and the top wall 43 of the vertical supply tube portion 10, which communicates the interior of the injection tube portion 30 with the interior of the upper end of the vertical supply tube portion 10 in the vertical direction. Closure portion 35 is fitted into the rear end of injection tube portion 30, closing the rear end opening of injection tube portion 30. Closure portion 35 is formed in the shape of a horizontally oriented cylinder with a bottom that is open at the front and closed at the rear.

[0036] The pressure accumulating member 31 is disposed within the injection tube portion 30 so as to be movable back and forth, and blocks communication between the interior of the vertical supply tube portion 10 and the ejection holes 4 through the interior of the injection tube portion 30. The pressure accumulating member 31 is formed in a rod shape extending in the front-to-rear direction, and blocks communication between the interior of the vertical supply tube portion 10 and the ejection holes 4 through the interior of the injection tube portion 30 by abutting against the inner circumferential surface of the injection tube portion 30 in the front-to-rear direction. The pressure accumulating member 31 moves rearward when the pressure within the injection tube portion 30 increases, thereby connecting the interior of the vertical supply tube portion 10 and the ejection holes 4 through the interior of the injection tube portion 30.

[0037] The elastic body 33 biases the pressure accumulating member 31 forward as it moves rearward. 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 inside the rear end of the injection tube portion 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, and the interior of the vertical supply tube portion 10 and the ejection hole 4 are connected through the injection tube portion 30.

[0038] The switching valve 40 is provided inside the vertical supply tube section 10. The switching valve 40 switches between communication between the vertical supply tube section 10 and the container body A and the cylinder 23 through the horizontal connecting passage 18 and cuts off communication in response to pressure increase or decrease in the cylinder 23. The switching valve 40 is a ball valve and is formed, for example, from a material with 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 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 as it moves radially inward from the inner surface of the vertical supply tube section 10. The switching valve 40 and the valve seat 41 are located below the horizontal connecting passage 18. The switching valve 40 and the valve seat 41 are provided within the upper end of the inner cylinder 10a of the vertical supply tube section 10.

[0039] In the illustrated example, a protrusion 44 that protrudes downward is formed on the lower surface of the top wall 43 of the vertical supply tube portion 10. The protrusion 44 is arranged coaxially with the central axis O1. The protrusion 44 faces the rear end opening of the horizontal connecting passage 18 in the front-to-rear direction. The lower end of the protrusion 44 is spaced upward from the switching valve 40. The switching valve 40, which is spaced upward from the valve seat 41, abuts against the lower end of the protrusion 44. The top wall 43 and the protrusion 44 are provided on the outer tube 10b of the vertical supply tube portion 10.

[0040] Here, the ejector body 2 comprises an outer member 6 having the outer tube 10b of the vertical supply tube portion 10, the second flange portion 12, the fixed tube 51, and the fitting tube 54, and an inner member 7 having the inner tube 10a of the vertical supply tube portion 10, the first flange portion 11, and the locking tube 52. The outer member 6 further has a cylinder tube portion 14 and an injection tube portion 30, and is configured by integrally forming the outer tube 10b, the second flange portion 12, the fixed tube 51, the fitting tube 54, the cylinder tube portion 14, and the injection tube portion 30. The inner member 7 is fixed to the container body A by the cap C pressing the first flange portion 11 formed on the inner cylinder 10a onto the upper opening edge of the mouth portion from above.

[0041] Nozzle member 3 is attached to the front end of ejector main body 2, and ejection holes 4 eject liquid forward. Nozzle member 3 includes relay member 3a attached to the front end of injection tube portion 30, and nozzle main body 3b rotatably attached to relay member 3a while being prevented from slipping out forward. The relay member 3a is formed in a cylindrical shape extending in the front-rear direction. The front portion of the injection tube portion 30 is fitted into the rear portion of the relay member 3a. The front portion of the relay member 3a protrudes forward from the injection tube portion 30. The nozzle body 3b is formed in a horizontally facing cylindrical shape with a top that is closed at the front end thereof. An ejection hole 4 is formed at the front end of the nozzle body 3b.

[0042] 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 members 5 elastically deform when the trigger portion 21 moves rearward. The biasing members 5 bias the trigger portion 21 forward even before the trigger portion 21 moves rearward. Note that 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 that extends in the front-rear direction and has its front and back surfaces facing the left-right direction. The front end of the biasing member 5 abuts against the trigger portion 21 from behind the trigger portion 21. The front end of the biasing member 5 abuts against both left-right ends of the trigger portion 21. The rear portion of the biasing member 5 extends straight in the front-rear direction, and the front portion of the biasing member 5 extends downward as it moves forward.

[0043] The rear ends of the pair of urging members 5 are connected in the left-right direction via the blocking portion 35. The vertical centers of the blocking portion 35 and the rear ends of the urging members 5 are substantially aligned with each other. The urging members 5, the blocking portion 35, and the elastic body 33 are integrally formed from a resin material such as an olefin resin, such as polypropylene (PP), or polyketone (POK). The urging members 5, the blocking portion 35, and the elastic body 33 are formed from the same material.

[0044] Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described. It is assumed that each part of the trigger type liquid ejector 1 is filled with liquid.

[0045] When the trigger portion 21 is pulled rearward, the front portion of the biasing member 5 bends rearward around the connection portion with the rear portion, causing the piston 22 to move rearward, and pressurizing the inside of the cylinder 23. At this time, the liquid in the cylinder 23 flows into the upper end portion of the vertical supply tube portion 10 through the horizontal communicating passage 18, and this liquid presses the switching valve 40 against the valve seat 41, thereby blocking communication between the inside of the cylinder 23 and the inside of the container body A through the horizontal communicating passage 18. As a result, the liquid that has flowed into the upper end portion of the vertical supply tube portion 10 is supplied into the rear end portion of the injection tube portion 30 through the vertical communicating passage 19. When the internal pressure in this portion rises and exceeds a predetermined value, the pressure accumulating member 31 moves rearward while elastically deforming the elastic body 33, thereby connecting the inside of the vertical supply tube portion 10 to the ejection hole 4 through the inside of the injection tube portion 30, and the liquid is ejected from the ejection hole 4.

[0046] 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 to a pressure 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.

[0047] As described above, according to the trigger-type liquid sprayer 1 of this embodiment, a first locking projection 53 is provided which protrudes upward from the rear end of the locking tube 52 and penetrates the second flange portion 12 in the vertical direction, and a first locking protrusion 53a is formed at the upper end of the first locking projection 53 which protrudes upward from the second flange portion 12 and protrudes rearward, with its lower end surface abutting or close to the upper surface of the second flange portion 12. Therefore, when the trigger-type liquid ejector 1 is dropped, and the external force transmitted from the nozzle member 3 to the outer member 6 causes the locking tube 52 to attempt to come out from inside the fixed tube 51, the lower end surface of the first locking protrusion 53a comes into contact with the upper surface of the second flange portion 12, and this, combined with the fact that the first locking protrusion 53 is provided at the rear end of the locking tube 52, effectively prevents the locking tube 52 from coming out from inside the fixed tube 51 and also prevents damage to the locking tube 52.

[0048] A second locking protrusion 52b protrudes rearward from the outer peripheral surface of the rear end of the locking tube 52 and abuts or is close to the inner surface of the first fixing hole 51b of the fixed tube 51. Therefore, the rear end of the locking tube 52 is locked to the outer member 6 at two points in the vertical direction by the first locking protrusion 53a and the second locking protrusion 52b, thereby reliably preventing the locking tube 52 from coming off from within the fixed tube 51.

[0049] Since the second locking protrusion 52b is connected to the outer surface of the locking tube 52 along its entire vertical length, when the second locking protrusion 52b abuts against the inner surface of the first fixing hole 51b, the fixed tube 51 and the locking tube 52 can be prevented from rattling in the vertical direction, and the locking tube 52 can be reliably prevented from coming off from within the fixed tube 51.

[0050] A second fixing hole 51a that opens radially is formed in the fixed tube 51, and a second locking protrusion 52a that extends radially outward in a direction that intersects the radial direction as it moves radially outward is provided on the outer surface of the locking tube 52, and the tip edge of the second locking protrusion 52a abuts or is close to the inner surface of the second fixing hole 51a with a radial gap provided between it and the outer surface of the locking tube 52. Therefore, when the trigger-type liquid ejector 1 falls, and the external force transmitted from the nozzle member 3 to the outer member 6 causes the locking tube 52 to attempt to come out from inside the fixed tube 51, the tip edge of the second locking protrusion 52a abuts against the inner surface of the second fixing hole 51a, and a compressive force is applied to the second locking protrusion 52a, thereby preventing the locking tube 52 from coming out from inside the fixed tube 51.

[0051] Since the second locking projection 52a extends downward as it moves radially outward from the outer peripheral surface of the locking tube 52, when the trigger-type liquid sprayer 1 is dropped and the locking tube 52 tries to come out from inside the fixed tube 51, the tip edge of the second locking projection 52a comes into contact with the inner surface of the second fixing hole 51a in the vertical direction, and a vertical compressive force is applied to the second locking projection 52a, thereby reliably preventing the locking tube 52 from coming out from inside the fixed tube 51.

[0052] 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.

[0053] For example, the pressure accumulating member 31, the elastic body 33, the protrusion 44, the first fixing hole 51b, the second locking protrusion 52b, the second fixing hole 51a, and the second locking projection 52a may not be provided. A plurality of first locking projections 53 may be provided at intervals in the circumferential direction. For example, the first locking projections 53 may be provided on both left and right ends of the locking tube 52. The second locking projection 52b may be provided on the locking tube 52 at a portion spaced apart from the rear end in the circumferential direction. The second locking projection 52a may be provided at the rear end of the locking tube 52 or the like.

[0054] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0055] 1 trigger-type liquid jet 2 Squirt body 3 Nozzle member 4 Spout hole 6 Outer member 7 Inner member 10 Vertical supply tube 10a inner cylinder 10b Outer cylinder 11 First flange 12 Second flange 20 Trigger mechanism 21 Trigger section 51 Fixed tube 51a 2nd fixing hole 51b 1st fixing hole 52 Locking tube 52a 2nd locking protrusion 52b 2nd locking protrusion 53 1st locking protrusion 53a Series 1 Stop Protrusion A container body

Claims

1. an ejector body attached to a container containing a liquid; a nozzle member attached to a front end of the ejector body and having an ejection hole formed therein for ejecting the 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 so as to be movable rearward, the trigger portion moving rearward to cause the liquid to flow from inside the vertical supply tube portion toward the ejection hole side, The vertical supply tube portion is composed of an inner tube communicating with the inside of the container body and an outer tube exteriorly fitted to the inner tube, The ejector body includes: an inner member having the inner tube, a first flange portion, and a locking tube, and fixed to the container body; an outer member having the outer cylinder, a second flange portion, and a fixed cylinder, the first flange portion protrudes radially outward from a portion of the inner cylinder that is positioned below the outer cylinder, and is disposed on an upper opening edge of a mouth portion of the container body; The locking cylinder protrudes upward from the first flange portion and is inserted into the fixed cylinder, the second flange portion protrudes radially outward from the outer cylinder and is located above the first flange portion, the fixed barrel protrudes downward from the second flange portion, a first locking projection that projects upward from a rear end of the locking tube and penetrates the second flange in the up-down direction; A trigger-type liquid sprayer in which the upper end of the first locking projection that protrudes upward from the second flange portion is formed with a first locking protrusion that protrudes rearward and whose lower end surface abuts or is close to the upper surface of the second flange portion.

2. The fixed cylinder is formed with a first fixing hole that opens in the radial direction, 2. The trigger-type liquid ejector according to claim 1, wherein a second locking projection is provided on the outer peripheral surface of the rear end of the locking tube, the second locking projection projecting rearward and abutting against or adjacent to the inner surface of the first fixing hole.

3. The trigger-type liquid ejector according to claim 2 , wherein the second locking projection is connected to the outer circumferential surface of the locking tube over the entire length in the vertical direction.

4. The fixed cylinder is formed with a second fixing hole that opens in the radial direction, A second locking projection is provided on the outer circumferential surface of the locking tube, and extends in a direction intersecting the radial direction as it moves radially outward.

4. A trigger-type liquid ejector as described in any one of claims 1 to 3, wherein the tip edge of the second locking projection abuts or is close to the inner surface of the second fixing hole with a radial gap provided between the tip edge and the outer peripheral surface of the locking tube.

5. 5. The trigger-type liquid ejector according to claim 4, wherein the second locking projection extends downward from the outer circumferential surface of the locking tube toward the outside in the radial direction.

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