Trigger type liquid ejector

Abstract

To switch an ejection mode of liquid without deteriorating operability.SOLUTION: A nozzle body 30 moves from a first position where communication between a flow passage 33 and the inside of a vertical supply cylinder section is cut off in a process in which the nozzle body rotates toward one side in a nozzle peripheral direction with respect to a guide member 18 to a second position where the flow passage communicates with the inside of the vertical supply cylinder section and fluid passing through the flow passage is ejected while turning in a nozzle peripheral direction from an ejection hole 15 and a third position where liquid passing through the flow passage is linearly ejected from the ejection hole by engagement of a third engagement section 36 with a fourth engagement section 37 and movement forward of a connection member 31 integrally with the nozzle body with respect to the guide member in a state that a first engagement section and a second engagement section abut on each other in the nozzle peripheral direction and the flow passage communicates with the inside of the vertical supply cylinder section, in this order.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Conventionally, as shown in, for example, Patent Document 1 below, there has been known a trigger-type liquid ejector which comprises an ejector body having a vertical supply tube portion which sucks up liquid within a container body, a nozzle member having an ejection hole which ejects the liquid forward, and a nozzle cover body which can switch the ejection mode of the liquid by opening and closing the ejection hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-123910 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional trigger type liquid ejector, the nozzle cover that opens the ejection hole may get in the way during operation.

[0005] The present invention provides a trigger type liquid ejector that can switch the liquid ejection mode without compromising operability. [Means for solving the problem]

[0006] A trigger type liquid ejector according to one aspect of the present invention comprises an ejector body that is attached to a container body that contains liquid, and a nozzle member that is attached to a front end of the ejector body and has an ejection hole that ejects liquid forward, the ejector body having a vertical supply tube section that extends in the vertical direction and sucks up the liquid in the container body, and a trigger section that is provided in front of the vertical supply tube section and can move rearward in a forward biased state, and a trigger mechanism that causes liquid to flow from within the vertical supply tube section toward the ejection hole side by moving the trigger section rearward, and the nozzle member is a trigger mechanism that causes liquid to flow from within the vertical supply tube section toward the ejection hole side by moving the trigger section rearward, the nozzle body includes a cylindrical guide member attached to a front end of the nozzle body, a cylindrical nozzle body rotatably fitted around the front end of the guide member, and a cylindrical connecting member provided between an outer circumferential surface of the front end of the guide member and an inner circumferential surface of the nozzle body, the guide member being provided with a guide shaft portion extending in a front-rear direction, the nozzle body including a nozzle wall portion having the ejection hole formed therein and facing a front end surface of the guide shaft portion in the front-rear direction, and a nozzle cylinder portion extending rearward from the nozzle wall portion and rotatably fitted around the guide shaft portion, the front end surface of the guide shaft portion being connected to the front end surface of the guide shaft portion, A flow path in which the ejection holes are open is provided between the rear surface of the nozzle wall portion, and a first communication groove and a second communication groove are separately formed on the outer circumferential surface of the guide shaft portion and the inner circumferential surface of the nozzle cylinder portion, which switch between communication between the flow path and the interior of the vertical supply cylinder portion and blocking the communication as the nozzle main body rotates relative to the guide member, and a first engagement portion and a second engagement portion are respectively formed on the inner circumferential surface of the nozzle main body and the outer circumferential surface of the connecting member, which abut against each other in the nozzle circumferential direction and enable the nozzle main body and the connecting member to rotate together in the nozzle circumferential direction relative to the guide member. a third engaging portion and a fourth engaging portion are separately provided on an outer peripheral surface of a front end portion of the guide member and on an inner peripheral surface of the connecting member, and the third engaging portion and the fourth engaging portion are separately provided on the outer peripheral surface of the front end portion of the guide member and the inner peripheral surface of the connecting member, for moving the connecting member back and forth in accordance with the rotational movement of the connecting member in the nozzle circumferential direction relative to the guide member, and the nozzle body, in the process of rotating toward one side in the nozzle circumferential direction relative to the guide member from a first position in which communication between the flow path and the vertical supply tube portion is blocked, moves to a second position in which the flow path and the vertical supply tube portion are connected and liquid that has passed through the flow path is ejected from the ejection hole while swirling in the nozzle circumferential direction;a third position in which the first engaging portion and the second engaging portion butt against each other in the nozzle circumferential direction and the flow path is in communication with the inside of the vertical supply cylinder portion, the third engaging portion and the fourth engaging portion engage with each other, and the connecting member moves forward relative to the guide member together with the nozzle body, causing liquid that has passed through the flow path to be sprayed in a straight line from the spray hole.

[0007] According to the present invention, a connecting member is provided between the outer peripheral surface of the front end of the guide member and the inner peripheral surface of the nozzle body, a first engaging portion and a second engaging portion are separately provided on the inner peripheral surface of the nozzle body and the outer peripheral surface of the connecting member, and a third engaging portion and a fourth engaging portion are separately provided on the outer peripheral surface of the front end of the guide member and the inner peripheral surface of the connecting member.Therefore, in the process of rotating the nozzle body toward one side in the nozzle circumferential direction relative to the guide member from a first position in which communication between the flow path and the inside of the vertical supply tube portion is blocked, the nozzle body can be moved in this order between a second position in which the flow path and the inside of the vertical supply tube portion are connected and liquid that has passed through the flow path is ejected from the nozzle hole while swirling in the nozzle circumferential direction, and a third position in which the first engaging portion and the second engaging portion abut each other in the nozzle circumferential direction and the flow path and the inside of the vertical supply tube portion are connected, the third engaging portion and the fourth engaging portion engage with each other, and the connecting member moves forward relative to the guide member together with the nozzle body, causing liquid that has passed through the flow path to be ejected in a straight line from the nozzle hole. Therefore, the liquid ejection mode can be switched simply by rotating the nozzle body in the nozzle circumferential direction, and the liquid ejection mode can be switched without compromising operability. In the third position, the connecting member moves forward relative to the guide member together with the nozzle body, so that the flow path between the front end face of the guide shaft portion and the rear face of the nozzle wall portion is expanded in the front-to-rear direction. This reduces the flow rate of liquid from the vertical supply tube portion when it flows into the flow path, makes it difficult for the liquid to swirl in the flow path, and causes the liquid that has passed through the flow path to be sprayed in a straight line from the nozzle hole.

[0008] The nozzle wall portion has a foam-forming cylinder that protrudes forward and surrounds the outlet hole from the outside in the nozzle radial direction, and the second position includes a foam ejection position where liquid collides with the inner surface of the foam-forming cylinder and foams, and a mist ejection position where liquid is ejected in a mist from within the foam-forming cylinder, and at the foam ejection position, the flow path cross-sectional area of ​​the first connecting groove formed on the outer surface of the guide shaft portion, which is connected to the second connecting groove formed on the inner surface of the nozzle cylinder portion, may be smaller than the flow path cross-sectional area of ​​the first connecting groove connected to the second connecting groove at the mist ejection position.

[0009] Since the second position includes a foam ejection position where the liquid collides with the inner surface of the foam-forming cylinder to foam, and a mist ejection position where the liquid is ejected in a mist form from inside the foam-forming cylinder, the liquid ejection pattern can be switched in a variety of ways. At the foam ejection position, the flow path cross-sectional area of ​​the first connecting groove formed on the outer surface of the guide shaft portion, which is connected to the second connecting groove formed on the inner surface of the nozzle tube portion, is smaller than the flow path cross-sectional area of ​​the first connecting groove to which the second connecting groove is connected at the mist ejection position.Therefore, the spray angle of the liquid ejected from the ejection hole at the foam ejection position can be made larger than that at the mist ejection position, so that the liquid ejected from the ejection hole at the foam ejection position can be reliably collided with the inner surface of the foam-forming cylinder, and the liquid ejected from the ejection hole at the mist ejection position can be made less likely to collide with the inner surface of the foam-forming cylinder.

[0010] The first communication groove with which the second communication groove communicates in the third position may be the same as the first communication groove with which the second communication groove communicates in the mist ejection position.

[0011] In the third position, the first communication groove to which the second communication groove is connected is the same as the first communication groove to which the second communication groove is connected in the mist ejection position, so that the flow rate of liquid flowing from the second communication groove through the first communication groove into the flow path is reliably suppressed in the third position, and the liquid that has passed through the flow path can be ejected stably in a straight line from the ejection hole. Effect of the Invention

[0012] According to the present invention, it is possible to switch the liquid ejection mode without compromising operability. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a vertical cross-sectional view of a trigger-type liquid ejector according to one embodiment. [Diagram 2] FIG. 2 is a front view of the nozzle member of FIG. [Diagram 3] FIG. 2 is a partially enlarged view of FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. 4 is a diagram showing the nozzle member in FIG. 3 when located at the foam ejection position. [Figure 7] 6 is a cross-sectional view taken along line AA in FIG. 3. FIG. [Figure 8] FIG. 7 is a cross-sectional view taken along line BB in FIG. 6. [Figure 9] FIG. 4 is a diagram showing the nozzle member in FIG. 3 when located at the mist ejection position. [Figure 10] 9 is a cross-sectional view taken along line AA in FIG. 3. FIG. [Figure 11] 10 is a cross-sectional view taken along line BB in FIG. 9. [Figure 12] FIG. 4 is a diagram illustrating the nozzle member in FIG. 3 when it is located at a third position. [Figure 13] 12 is a cross-sectional view taken along line AA in FIG. 3. FIG. [Figure 14] FIG. 13 is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] An embodiment of a trigger type liquid ejector will be described below. As shown in Fig. 1, the trigger type liquid ejector 1 comprises an ejector body 11 that is attached to a container body A that contains liquid, and a nozzle member 12 that is attached to the ejector body 11. Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

[0015] The ejector body 11 has a vertical supply tube portion 13 and a trigger mechanism T. Hereinafter, the direction along the central axis O1 of the vertical supply tube portion 13 is referred to as the vertical direction, and the bottom side (not shown) of the container body A along the vertical direction is referred to as the lower side, and the opposite side is referred to as the upper side. When viewed from the vertical direction, the side where the nozzle member 12 is located with respect to the vertical supply tube portion 13 is referred to as the front side, and the opposite side is referred to as the rear side. When viewed from the vertical direction, the direction perpendicular to the front-rear direction is referred to as the left-right direction.

[0016] The vertical supply tube portion 13 extends in the vertical direction, is inserted into the mouth portion A1 of the container body A, and sucks up the liquid in the container body A. The trigger mechanism T causes the liquid to flow from inside the vertical supply tube portion 13 toward the nozzle hole 15 side described later by the rearward movement of the trigger portion 14. The trigger mechanism T includes a trigger portion 14 extending in the vertical direction and provided in front of the vertical supply tube portion 13 so as to be movable rearward in a forward biased state, a piston 16 that moves back and forth in conjunction with the movement of the trigger portion 14, and a cylinder 17 into which the piston 16 is inserted and whose inside communicates with the inside of the vertical supply tube portion 13.

[0017] An injection tube portion 20 is provided in front of the vertical supply tube portion 13 . The injection tube portion 20 allows the liquid in the vertical supply tube portion 13 to flow toward the injection hole 15 side described later. The injection tube portion 20 extends forward from the upper end portion of the vertical supply tube portion 13. The inside of the injection tube portion 20 is connected to the inside of the vertical supply tube portion 13.

[0018] A valve mechanism 27 is provided within the vertical supply tube portion 13. When the internal pressure of cylinder 17 rises due to the rearward movement of trigger portion 14, valve mechanism 27 connects the interior of cylinder 17 to the interior of container body A while blocking communication between them, and when the pressure inside cylinder 17 becomes negative due to the forward return movement of trigger portion 14, valve mechanism 27 connects the interior of cylinder 17 to the interior of container body A while blocking communication between them.

[0019] An inverted normal adapter 50 is attached to the vertical supply tube portion 13. The inverted upright adapter 50 is configured so that when the container body A to which the ejector main body 11 is attached is in the upright position, as well as when the container body A is inverted, the liquid in the container body A can be supplied into the cylinder 17 through the vertical supply tube portion 13 when negative pressure is generated in the cylinder 17 due to the forward return movement of the trigger portion 14. It should be noted that the inverted normal adapter 50 need not be provided.

[0020] The nozzle member 12 is attached to the front end of the ejector body 11 and has an ejection hole 15 for ejecting liquid forward. The nozzle member 12 includes a cylindrical guide member 18, a cylindrical nozzle body 30, and a cylindrical connecting member 31. The guide member 18, the nozzle body 30, and the connecting member 31 are arranged coaxially with a common axis extending in the front-rear direction.

[0021] Hereinafter, this common axis will be referred to as the nozzle axis O2, the direction intersecting the nozzle axis O2 when viewed from the front-rear direction will be referred to as the nozzle radial direction, and the direction going around the nozzle axis O2 will be referred to as the nozzle circumferential direction.

[0022] The guide member 18 is combined with the injection tube portion 20 from the front and attached to the front end portion of the ejector main body 11. The rear part of guide member 18 is fitted onto the outside of injection tube portion 20, and the front end part of guide member 18 is located forward of injection tube portion 20. Guide member 18 is provided with partition wall 19 which covers the front end opening of injection tube portion 20 from the front, and guide shaft portion 23 which extends forward from partition wall 19.

[0023] Partition wall 19 is provided at the connecting portion between the front end and the rear end of guide member 18. Partition wall 19 has a communication hole 24 that communicates with the inside of injection tube portion 20 formed therein. The guide shaft portion 23 is disposed coaxially with the nozzle axis O2. A first foam communication groove (first communication groove) 28 and a first mist communication groove (first communication groove) 32 (see FIG. 5) are formed on the outer peripheral surface of the front end portion of the guide shaft portion 23, extending in the front-rear direction and opening forward. The flow path cross-sectional area of ​​the first foam communication groove 28 is smaller than the flow path cross-sectional area of ​​the first mist communication groove 32. The first foam communication groove 28 and the first mist communication groove 32 are provided on the outer peripheral surface of the guide shaft portion 23 at intervals in the nozzle circumferential direction. Two first foam communication grooves 28 and two first mist communication grooves 32 are provided, one on each side of the nozzle axis O2 in the nozzle radial direction.

[0024] The nozzle body 30 is mounted on the front end of the guide member 18 so as to be rotatable around the nozzle axis O2. The nozzle body 30 includes a nozzle wall portion 25 in which the ejection hole 15 is formed and which faces the front end surface of the guide shaft portion 23 in the front-rear direction, and a nozzle cylinder portion 26 which extends rearward from the nozzle wall portion 25 and is rotatably fitted around the guide shaft portion 23.

[0025] A flow path 33, in which the ejection holes 15 open, is provided between the rear surface of the nozzle wall portion 25 and the front end surface of the guide shaft portion 23. The flow path 33 is defined by a recess formed in the rear surface of the nozzle wall portion 25 and the flat front end surface of the guide shaft portion 23. 5, the recess includes a spin chamber 33a having a circular shape arranged coaxially with the nozzle axis O2 as viewed from the front-rear direction, and a spin groove 33b extending in a tangential direction contacting the inner peripheral surface of the spin chamber 33a as viewed from the front-rear direction. Two spin grooves 33b are provided, one on each side sandwiching the nozzle axis O2 in the nozzle radial direction, and open into the spin chamber 33a in the same direction in the nozzle circumferential direction.

[0026] A second communication groove 29 that extends in the front-rear direction and opens rearward is formed on the inner peripheral surface of the nozzle tube portion 26. The second communication groove 29 communicates with the inside of the front end portion of the guide member 18. The second communication grooves 29 are provided on both sides of the nozzle axis O2 in the nozzle radial direction. The front end portion of the second communication groove 29, the rear end portion of the first foam communication groove 28, and the rear end portion of the first mist communication groove 32 are all positioned in the same front-rear direction.

[0027] When the nozzle body 30 rotates about the nozzle axis O2 relative to the guide member 18 and the circumferential position of the second connecting groove 29 coincides with the circumferential position of the first connecting groove 28 for foam or the first connecting groove 32 for mist, the flow path 33 communicates with the inside of the vertical supply tube section 13 through the front end section of the guide member 18, the connecting hole 24, and the inside of the injection tube section 20, and when the second connecting groove 29 moves circumferentially away from the first connecting groove 28 for foam and the first connecting groove 32 for mist, the communication between the flow path 33 and the inside of the vertical supply tube section 13 is cut off.

[0028] The connecting member 31 is provided between the outer peripheral surface of the front end portion of the guide member 18 and the inner peripheral surface of the nozzle body 30. The connecting member 31 is provided rotatable in the nozzle circumferential direction while its movement in the front-rear direction relative to the nozzle body 30 is restricted.

[0029] A first engagement portion 34 and a second engagement portion 35 are provided on the inner surface of the nozzle body 30 and the outer surface of the connecting member 31, which abut against each other in the nozzle circumferential direction, thereby enabling the nozzle body 30 and the connecting member 31 to rotate together in the nozzle circumferential direction relative to the guide member 18. The first engagement portion 34 protrudes inward in the nozzle radial direction from the inner circumferential surface of the nozzle body 30. The second engagement portion 35 protrudes outward in the nozzle radial direction from the outer circumferential surface of the connecting member 31 and faces the first engagement portion 34 in the nozzle circumferential direction.

[0030] A third engagement portion 36 and a fourth engagement portion 37 are provided on the outer circumferential surface of the front end portion of the guide member 18 and on the inner circumferential surface of the connecting member 31, respectively, to move the connecting member 31 back and forth in accordance with the rotational movement of the connecting member 31 in the nozzle circumferential direction relative to the guide member 18. In the illustrated example, the third engagement portion 36 is a male screw provided on the outer circumferential surface of the front end portion of the guide member 18, and the fourth engagement portion 37 is a female screw provided on the inner circumferential surface of the connecting member 31 and screwed into the third engagement portion 36.

[0031] A protrusion 40 protruding outward in the nozzle radial direction is formed on the outer circumferential surface of the front end of the guide member 18, in a portion located rearward of the connecting member 31 and the third engagement portion 36. A recess 40a that opens forward and extends in the nozzle circumferential direction is formed on the protrusion 40. A restricting protrusion 39 that protrudes rearward and enters the recessed portion 40a is formed on the rear end opening edge of the connecting member 31. When the restricting protrusion 39 abuts against the end face of the recessed portion 40a in the nozzle circumferential direction, further rotational movement of the connecting member 31 relative to the guide member 18 is restricted.

[0032] In the above configuration, as the nozzle body 30 rotates from a first position (Figures 1 to 5) in which communication between the flow path 33 and the interior of the vertical supply tube section 13 is blocked toward one side in the nozzle circumferential direction relative to the guide member 18, it moves between a second position (Figures 6 to 11) in which the flow path 33 is connected to the interior of the vertical supply tube section 13 and liquid that has passed through the flow path 33 is ejected from the nozzle hole 15 while rotating in the nozzle circumferential direction (Figures 6 to 11), and a third position (Figures 12 to 14) in which the first engagement portion 34 and the second engagement portion 35 abut against each other in the nozzle circumferential direction and the flow path 33 is connected to the interior of the vertical supply tube section 13, the third engagement portion 36 and the fourth engagement portion 37 engage with each other, and the connecting member 31 moves forward relative to the guide member 18 together with the nozzle body 30, causing the liquid that has passed through the flow path 33 to be ejected in a straight line from the nozzle hole 15. In the second position, the rear surface of the nozzle wall portion 25 and the front end surface of the guide shaft portion 23 abut against each other in the front-to-rear direction, and in the third position, the rear surface of the nozzle wall portion 25 moves forward away from the front end surface of the guide shaft portion 23.

[0033] 6, 9, and 12 show longitudinal cross-sectional views along the front-rear direction at a position including the center portion of the second communication groove 29 in the nozzle circumferential direction.

[0034] Until the nozzle body 30 passes through the second position toward the third position, the first engagement portion 34 of the nozzle body 30 does not press the second engagement portion 35 of the connecting member 31 toward one side in the nozzle circumferential direction, and the connecting member 31 is maintained in a state not rotating in the nozzle circumferential direction. Then, when the nozzle body 30 passes through the second position toward the third position, the first engagement portion 34 presses the second engagement portion 35 toward one side in the nozzle circumferential direction, and the nozzle body 30 and the connecting member 31 rotate together toward one side in the nozzle circumferential direction relative to the guide member 18 until the regulating protrusion 39 of the connecting member 31 reaches an end face on one side in the nozzle circumferential direction of the recessed portion 40a of the guide member 18. At this time, the third engagement portion 36 of the guide member 18 and the fourth engagement portion 37 of the connecting member 31 engage with each other, so that the nozzle body 30 and the connecting member 31 move forward together relative to the guide member 18, and the flow path 33 between the front end face of the guide shaft portion 23 and the rear face of the nozzle wall portion 25 is expanded in the front-rear direction. This reduces the flow rate of the liquid when it flows into the flow path 33 from the vertical supply tube portion 13, making it difficult for the liquid to swirl in the flow path 33, and the liquid that has passed through the flow path 33 is sprayed linearly from the ejection hole 15.

[0035] In this embodiment, a foam-forming tube 38 is formed on the nozzle wall 25, protruding forward and surrounding the nozzle hole 15 from the outside in the nozzle radial direction. An outside air introduction hole 38a capable of supplying air into the foam-forming tube 38 is formed at the rear end of the foam-forming tube 38. A plurality of outside air introduction holes 38a are provided at intervals in the nozzle circumferential direction.

[0036] The aforementioned second position includes a foam ejection position (Figures 6 to 8) where the liquid collides with the inner surface of the foam-forming cylinder 38 and foams, and a mist ejection position (Figures 9 to 11) where the liquid is ejected in a mist form from inside the foam-forming cylinder 38. At the foam ejection position, the second communication groove 29 of the nozzle cylinder portion 26 communicates with the first foam communication groove 28 of the guide shaft portion 23, and at the mist ejection position, the second communication groove 29 communicates with the first mist communication groove 32. As a result, at the foam ejection position, the flow path cross-sectional area of ​​the first foam communication groove 28 with which the second communication groove 29 of the nozzle cylinder portion 26 communicates is smaller than the flow path cross-sectional area of ​​the first mist communication groove 32 with which the second communication groove 29 communicates at the mist ejection position.

[0037] In the third position described above (Figs. 12 to 14), the second communication groove 29 communicates with the first mist communication groove 32, just like in the mist emission position. In the example shown, in the mist emission position, the second communication groove 29 communicates with the first mist communication groove 32 in a state where it juts out to the other side in the nozzle circumferential direction as shown in Fig. 11, and in the third position, the second communication groove 29 communicates with the same first mist communication groove 32 in a state where it juts out to one side in the nozzle circumferential direction as shown in Fig. 14.

[0038] A positioning protrusion 40b is formed on the outer circumferential surface of the protruding portion 40 of the guide member 18. The positioning protrusion 40b is provided behind the recessed portion 40a and adjacent to the recessed portion 40a in the nozzle circumferential direction. Three positioned portions 30a are formed at intervals in the nozzle circumferential direction on the inner peripheral surface of the nozzle body 30. The positioned portions 30a are composed of a pair of projections that are spaced apart in the nozzle circumferential direction. The positioning projections 40b and the positioned portions 30a are spaced apart from the first engagement portion 34 and the second engagement portion 35 in the front-rear direction. Each time the nozzle body 30 reaches the first position, the foam ejection position, and the mist ejection position, one of the two protrusions of the positioned portion 30a overcomes the positioning protrusion 40b in the nozzle circumferential direction, and the positioning protrusion 40b is sandwiched between the two protrusions of the positioned portion 30a.

[0039] Next, the operation of the trigger type liquid ejector 1 configured as above will be described. It is assumed that liquid is filled into each part of the ejector body 11 by operating the trigger portion 14 multiple times.

[0040] When the trigger portion 14 is pulled backward against the forward biasing force, the piston 16 retracts as the trigger portion 14 moves backward, and the liquid in the cylinder 17 is introduced into the vertical supply tube portion 13. The liquid introduced into the vertical supply tube portion 13 operates the valve mechanism 27 and is not supplied into the container body A, but is supplied into the injection tube portion 20, and then reaches the ejection hole 15 through the communication hole 24, the inside of the front end portion of the guide member 18, the second communication groove 29, and the first foam communication groove 28 or the first mist communication groove 32, and is ejected from the ejection hole 15. When the trigger 14 is released after the liquid is ejected, the trigger 14 moves forward to return to its original position, which in turn moves the piston 16 forward. This generates negative pressure in the cylinder 17, which activates the valve mechanism 27, and the liquid in the container body A is sucked up into the vertical supply tube 13, and then introduced into the cylinder 17 without being introduced into the injection tube 20.

[0041] In this embodiment, when the nozzle body 30 reaches the foam ejection position (FIGS. 6 to 8) from the first position, the second communication groove 29 of the nozzle tube portion 26 communicates with the first foam communication groove 28 of the guide shaft portion 23, and the spin groove 33b faces the first foam communication groove 28 in the front-rear direction. In this state, when liquid is ejected from the ejection hole 15 as described above, the liquid enters the foam-forming cylinder 38 while swirling in the nozzle circumferential direction, collides with the inner circumferential surface of the foam-forming cylinder 38, and foams. As a result, the foam-like liquid is ejected from the foam-forming cylinder 38.

[0042] When the nozzle body 30 reaches the mist ejection position (Figs. 9 to 11) from the foam ejection position, the second communication groove 29 of the nozzle tube portion 26 communicates with the first mist communication groove 32 of the guide shaft portion 23, and the spin groove 33b faces the first mist communication groove 32 in the front-rear direction. In this state, when liquid is ejected from the ejection hole 15 as described above, the liquid enters the foam-forming cylinder 38 while swirling in the nozzle circumferential direction, but the spray angle of the liquid is kept small and it is difficult for the liquid to collide with the inner peripheral surface of the foam-forming cylinder 38, and the liquid is ejected from the foam-forming cylinder 38 in a mist state.

[0043] At this time, the first engagement portion 34 of the nozzle body 30 is in contact with or close to the second engagement portion 35 of the connecting member 31, and when the nozzle body 30 passes the mist ejection position toward the third position (FIGS. 12 to 14), the first engagement portion 34 presses the second engagement portion 35 toward one side in the nozzle circumferential direction, so that the nozzle body 30 and the connecting member 31 rotate together toward one side in the nozzle circumferential direction relative to the guide member 18, as described above. Accordingly, the third engagement portion 36 of the guide member 18 and the fourth engagement portion 37 of the connecting member 31 engage with each other, so that the nozzle body 30 and the connecting member 31 move together forward relative to the guide member 18, and the flow path 33 between the front end face of the guide shaft portion 23 and the rear face of the nozzle wall portion 25 is expanded in the front-rear direction. As a result of the above, the nozzle body 30 reaches the third position (Figs. 12 to 14) from the mist ejection position. At this time, the second communication groove 29 of the nozzle tube portion 26 is maintained in communication with the first mist communication groove 32 of the guide shaft portion 23, and the spin chamber 33a faces the first mist communication groove 32 in the front-rear direction. In this state, when liquid from the vertical supply tube portion 13 flows into the expanded flow path 33, the flow rate of the liquid is reduced and the liquid becomes less likely to swirl in the flow path 33, and the liquid that has passed through the flow path 33 is ejected in a straight line from the ejection hole 15.

[0044] In addition, two second engagement portions 35 are provided on the outer peripheral surface of the connecting member 31, spaced apart in the nozzle circumferential direction, and as the nozzle body 30 rotates from the third position toward the other side in the nozzle circumferential direction, the first engagement portion 34 moves away from one of the two second engagement portions 35 and approaches the other second engagement portion 35 and abuts against it, causing the nozzle body 30 and the connecting member 31 to rotate together toward the other side in the nozzle circumferential direction relative to the guide member 18, and the third engagement portion 36 of the guide member 18 and the fourth engagement portion 37 of the connecting member 31 engage with each other, causing the nozzle body 30 and the connecting member 31 to move back together in a restored state relative to the guide member 18.

[0045] As described above, according to the trigger-type liquid ejector 1 of this embodiment, the nozzle body 30 can be moved between the second position and the third position in that order in the process of rotating from the first position toward one side in the nozzle circumferential direction relative to the guide member 18. Therefore, the liquid ejection mode can be switched simply by rotating the nozzle body 30 in the nozzle circumferential direction, and the liquid ejection mode can be switched without compromising operability.

[0046] Since the second position includes a foam ejection position where the liquid collides with the inner surface of the foam-forming cylinder 38 to foam, and a mist ejection position where the liquid is ejected in a mist form from within the foam-forming cylinder 38, the liquid ejection pattern can be switched in a variety of ways. At the foam ejection position, the flow path cross-sectional area of ​​the first foam communicating groove 28, which is connected to the second communicating groove 29 of the nozzle tube portion 26, is smaller than the flow path cross-sectional area of ​​the first mist communicating groove 32, which is connected to the second communicating groove 29, at the mist ejection position.Therefore, the spray angle of the liquid ejected from the ejection hole 15 at the foam ejection position can be made larger than that at the mist ejection position, so that the liquid ejected from the ejection hole 15 at the foam ejection position can be reliably collided with the inner surface of the foam-forming cylinder 38, and the liquid ejected from the ejection hole 15 at the mist ejection position can be made less likely to collide with the inner surface of the foam-forming cylinder 38.

[0047] In the third position, the second connecting groove 29 continues to communicate with the first mist connecting groove 32 that was connected at the mist emission position, so that the flow rate of liquid flowing from the second connecting groove 29 through the first mist connecting groove 32 into the flow path 33 is reliably suppressed in the third position, and the liquid that has passed through the flow path 33 can be stably ejected in a straight line from the ejection hole 15.

[0048] 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.

[0049] For example, the nozzle wall portion 25 does not need to have the foam generating tube 38 formed therein. The second position may be only one of the bubble-ejecting position and the mist-ejecting position. In the third position, the second communication groove 29 may communicate with the first communication groove 28 for foam, or may communicate with another first communication groove different from the first communication groove 28 for foam and the first communication groove 32 for mist. In the third position, the spin groove 33b may face the first mist communication groove 32 in the front-rear direction.

[0050] In addition, within the scope of the spirit of the present invention, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described embodiments and variations may be combined as appropriate. [Explanation of symbols]

[0051] 1 Trigger-type liquid ejector 11 Squirt body 12 Nozzle member 13 Vertical supply tube 14 Trigger section 15 Spout hole 18 Guide member 23 Guide shaft 25 Nozzle wall 26 Nozzle cylinder 28 First connecting groove for foam (First connecting groove) 29 Second connecting ditch 30 Nozzle body 31 Connecting members 32 First fog groove (first fog groove) 33 Flow Path 34 First engagement portion 35 Second engagement portion 36 Third engagement part 37 Fourth engagement part 38 Foam cylinder A Container body A1 Mouth O2 nozzle axis T Trigger Mechanism

Claims

1. An ejector body that is attached to a container that contains a liquid; a nozzle member attached to a front end of the ejector body and having an ejection hole for ejecting liquid forward; The ejector body includes: A vertical supply tube portion that extends in a vertical direction and sucks up the liquid in the container body; a trigger mechanism including a trigger portion provided in front of the vertical supply tube portion and movable rearward in a forward biased state, the trigger portion moving rearward to cause liquid to flow from inside the vertical supply tube portion toward the nozzle hole side, The nozzle member is A cylindrical guide member attached to a front end of the ejector body; a cylindrical nozzle body rotatably mounted on a front end portion of the guide member; a cylindrical connecting member provided between an outer circumferential surface of a front end portion of the guide member and an inner circumferential surface of the nozzle body, The guide member is provided with a guide shaft portion extending in a front-rear direction, The nozzle body includes: a nozzle wall portion in which the ejection hole is formed and which faces a front end surface of the guide shaft portion in a front-rear direction; a nozzle cylinder portion extending rearward from the nozzle wall portion and rotatably fitted to the guide shaft portion, a flow passage in which the ejection hole opens is provided between a front end surface of the guide shaft portion and a rear surface of the nozzle wall portion, a first communication groove and a second communication groove are formed on an outer peripheral surface of the guide shaft portion and an inner peripheral surface of the nozzle cylinder portion, the first communication groove and the second communication groove switching communication between the flow passage and the interior of the vertical supply cylinder portion and blocking the communication in accordance with rotation of the nozzle body relative to the guide member, a first engaging portion and a second engaging portion are provided on an inner peripheral surface of the nozzle body and an outer peripheral surface of the connecting member, the first engaging portion and the second engaging portion being brought into contact with each other in a nozzle circumferential direction, and allowing the nozzle body and the connecting member to rotate integrally in the nozzle circumferential direction relative to the guide member; a third engaging portion and a fourth engaging portion are provided on an outer peripheral surface of a front end portion of the guide member and an inner peripheral surface of the connecting member, the third engaging portion and the fourth engaging portion being adapted to move the connecting member back and forth in accordance with a rotational movement of the connecting member in the nozzle circumferential direction relative to the guide member; The nozzle body includes: In the process of rotating from a first position where communication between the flow passage and the inside of the vertical supply tube portion is blocked toward one side in the nozzle circumferential direction relative to the guide member, a second position where the flow passage communicates with the inside of the vertical supply tube portion, and the liquid that has passed through the flow passage is ejected from the ejection hole while swirling in the nozzle circumferential direction; a third position in which the first engagement portion and the second engagement portion abut each other in the nozzle circumferential direction and the flow path is connected to the inside of the vertical supply tube portion, the third engagement portion and the fourth engagement portion engage each other, and the connecting member moves forward relative to the guide member together with the nozzle body, causing liquid that has passed through the flow path to be sprayed in a straight line from the spray hole.

2. A bubble-forming cylinder is formed on the nozzle wall portion, the bubble-forming cylinder protruding forward and surrounding the nozzle hole from the outside in the nozzle radial direction, The second position includes a foam ejection position where the liquid collides with the inner circumferential surface of the foam generating cylinder to foam, and a mist ejection position where the liquid is ejected in a mist form from within the foam generating cylinder, 2. A trigger-type liquid ejector as described in claim 1, wherein the flow path cross-sectional area of ​​the first connecting groove formed on the outer surface of the guide shaft portion, which communicates with the second connecting groove formed on the inner surface of the nozzle barrel portion at the foam ejection position, is smaller than the flow path cross-sectional area of ​​the first connecting groove with which the second connecting groove communicates at the mist ejection position.

3. 3. The trigger-type liquid ejector according to claim 2, wherein the first communication groove to which the second communication groove communicates in the third position is the same as the first communication groove to which the second communication groove communicates in the mist ejection position.

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