Trigger type liquid ejector

Abstract

To inhibit a biasing member installed between a rear end part of a main piston and a trigger part from being bent in a horizontal direction when the trigger part is moved backward.SOLUTION: A trigger mechanism 80 of an ejector body 2 includes: a biasing member 84 for biasing a trigger part 81 forward; a main cylinder 82 disposed backward of the trigger part and extending in a longitudinal direction; and a main piston 83 having a front-end part connected to the trigger part and a rear-end part fitted inside the main cylinder so as to be slidable forward and backward. The biasing member is installed between the rear-end part of the main piston and the trigger part and formed into a cylindrical shape extending in the longitudinal direction. The main piston is inserted into the inside of the biasing member. A projection part 85 projecting backward and inserted into a clearance between the inside of the biasing member and the main piston is installed in the trigger part. The projection part is respectively disposed on both sides across the main piston in a horizontal direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, there has been known a trigger-type liquid ejector comprising an ejector body and a nozzle member having an ejection hole formed therein, as shown in, for example, Patent Document 1 below, the ejector body comprising a vertical supply tube section which draws up liquid within a container body, and a trigger section which is arranged in front of the vertical supply tube section and capable of moving rearward in a forward biased state, and a trigger mechanism which causes liquid to flow from within the vertical supply tube section towards the ejection hole side by moving the trigger section rearward, the trigger mechanism comprising a biasing member which biases the trigger section forward, a main cylinder which is arranged behind the trigger section and extends in the front-to-rear direction, and a main piston whose front end is connected to the trigger section and whose rear end is fitted within the main cylinder so as to be slidable back and forth, the biasing member being provided between the rear end of the main piston and the trigger section, and formed in a cylindrical shape extending in the front-to-rear direction, and the main piston being inserted inside the biasing member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-98189 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned trigger-type liquid ejector, when the trigger part is moved backward, the biasing member provided between the rear end part of the main piston and the trigger part may bend in the left-right direction perpendicular to the up-down direction and the front-rear direction. In this case, for example, there is a risk that the trigger part may move in a direction intersecting the front-rear direction, or that a force in a direction intersecting the front-rear direction may be applied from the trigger part to the main piston.

[0005] The present invention provides a trigger-type liquid ejector that can prevent a biasing member provided between the rear end of the main piston and the trigger portion from bending left and right when the trigger portion is moved rearward. [Means for solving the problem]

[0006] A trigger type liquid ejector according to one aspect of the present invention comprises a ejector body that is attached to a container body that contains liquid, and a nozzle member that is attached to the ejector body and has an ejection hole formed therein for ejecting liquid. The ejector body comprises a vertical supply tube portion that sucks up liquid in the container body, and a trigger mechanism having a trigger portion that is arranged in front of the vertical supply tube portion and is movable rearward in a forwardly biased state, and causes liquid to flow from within the vertical supply tube portion toward the ejection hole side by moving the trigger portion rearward. The trigger mechanism comprises a biasing member that biases the trigger portion forward, and a biasing member that biases the trigger portion rearward. and a main cylinder extending in the front-to-rear direction, and a main piston whose front end is connected to the trigger portion and whose rear end is fitted within the main cylinder so as to be slidable back and forth, the biasing member is provided between the rear end of the main piston and the trigger portion and is formed in a cylindrical shape extending in the front-to-rear direction, the main piston is inserted inside the biasing member, the trigger portion is provided with a protruding portion that protrudes rearward and is inserted into a gap between the inside of the biasing member and the main piston, and the protruding portions are separately disposed on both sides of the main piston in the left-right direction perpendicular to the up-down direction and the front-to-rear direction.

[0007] The trigger portion is provided with a protrusion that protrudes rearward and is inserted into the gap between the biasing member and the main piston, and the protrusions are arranged separately on both sides of the main piston in the left-right direction. Therefore, even if the biasing member attempts to bend left-right when the trigger portion is moved rearward, the biasing member is supported in the left-right direction by the protrusions, and the biasing member can be prevented from bending left-right. For example, if the biasing member is a coil spring and the end faces of the wire constituting the coil spring face in a circumferential direction around the central axis of the biasing member, so that a step in the front-to-rear direction is provided at the front end opening edge of the biasing member that faces forward and with which the trigger portion abuts, it is thought that the biasing member will be more likely to bend in the left-right direction when the trigger portion is moved rearward; however, even with such a biasing member, by providing the trigger portion with the above-mentioned protrusion, it is possible to prevent the trigger portion from bending in the left-right direction when it is moved rearward.

[0008] The ejector main body may include a pair of side walls that cover the urging member from both left and right sides.

[0009] Since the ejector body has a pair of side wall portions that cover the urging member from both the left and right sides, the urging member provided between the rear end of the main piston and the trigger portion is covered from both the left and right sides by the pair of side wall portions, making it difficult to see from the outside and preventing liquid, etc., scattered by spray from adhering to the urging member. As described above, the protrusion makes it possible to prevent the biasing member from bending in the left-right direction when the trigger portion is moved rearward, thereby preventing the biasing member from coming into contact with the side wall portion.

[0010] The ejector body may include a storage cylinder into which liquid that has passed through the vertical supply tube portion is supplied as the trigger portion moves rearward, and a storage plunger that is arranged within the storage cylinder so as to be movable in an axial direction along the central axis of the storage cylinder, and that moves toward one side in the axial direction and is urged toward the other side in the axial direction as liquid is supplied into the storage cylinder.

[0011] The ejector body includes a reservoir cylinder and a reservoir plunger, allowing for continuous ejection of liquid. In other words, when the trigger portion is moved rearward to cause the liquid to flow from inside the vertical supply tube portion toward the nozzle hole side, the liquid is supplied from inside the vertical supply tube portion into the storage cylinder, and when pressure is applied inside the storage cylinder, the storage plunger is pressed toward one axial side against the biasing force toward the other axial side, and the storage plunger moves toward one axial side while spraying out the liquid. Therefore, each time the trigger portion is pulled, the storage plunger is moved to one side in the axial direction, and liquid can be ejected while the liquid is stored (filled) in the storage cylinder. When the operation of the trigger is stopped after the liquid is filled into the storage cylinder, the supply of liquid into the storage cylinder through the vertical supply tube is stopped, but the storage plunger begins to move back toward the other axial direction, so that the liquid filled in the storage cylinder can be pushed out from the storage cylinder toward the ejection hole, and can be ejected from the ejection hole. Effect of the Invention

[0012] According to the above-described aspect of the present invention, the biasing member provided between the rear end portion of the main piston and the trigger portion can be prevented from bending in the left-right direction when the trigger portion is moved rearward. [Brief description of the drawings]

[0013] [Figure 1] 1 is a vertical cross-sectional view of a trigger type liquid ejector according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a partially enlarged view of the trigger-type liquid ejector of FIG. 1. [Diagram 3] 3 is a cross-sectional view of the trigger-type liquid ejector of FIG. 2 taken along line III-III. [Figure 4] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1, the trigger type liquid ejector 1 of this embodiment includes an ejector body 2, a nozzle member 3, and a cover 5. Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

[0015] (Ejector body) The ejector body 2 is attached to a container body A containing a liquid via an attachment cap 30. The ejector body 2 mainly includes a vertical supply tube portion 10, a connection tube portion 20, a storage cylinder 40, a storage plunger 50, a plunger biasing member 60, an injection tube portion 70, a trigger mechanism 80, a ball valve 90, and a storage valve 91.

[0016] In this embodiment, the central axis of the vertical supply tube portion 10 is referred to as the axis O1, the container body A side along the axis O1 is referred to as the lower side, the opposite side is referred to as the upper side, and the direction along the axis O1 is referred to as the up-down direction. A direction intersecting the axis O1 as viewed from the up-down direction is referred to as the front-rear direction, and a direction perpendicular to the front-rear direction as viewed from the up-down direction is referred to as the left-right direction.

[0017] The vertical supply tube portion 10 extends in the vertical direction and sucks up the liquid in the container body A. The vertical supply tube portion 10 is attached to the container body A by an attachment cap 30. The upper portion of a pipe 10a that extends in the vertical direction and sucks up the liquid from the container body A is fitted into the vertical supply tube portion 10. The vertical supply tube portion 10 is formed in a double tube shape having an outer tube 11 and an inner tube 12. The inner tube 12 is formed with an insertion recess 12a into which an insertion protrusion 11a provided on the inner surface of the outer tube 11 is inserted. The insertion protrusion 11a is formed in a tube shape extending in the vertical direction, and the insertion recess 12a is an annular recess that opens to the outer surface of the inner tube 12 and extends around the axis O1.

[0018] The connecting tube portion 20 extends forward from the upper end of the vertical supply tube portion 10. Both ends in the front-rear direction of the connecting tube portion 20 are open. The rear end opening of the connecting tube portion 20 opens into the vertical supply tube portion 10. A blocking plug 100 is tightly fitted into the front end opening of the connecting tube portion 20.

[0019] The storage cylinder 40 is provided above the vertical supply tube section 10. The central axis O2 of the storage cylinder 40 extends in the front-rear direction (axial direction). The storage cylinder 40 may extend in a direction intersecting the front-rear direction when viewed from the top-bottom direction. The rear of the storage cylinder 40 protrudes rearward from the vertical supply tube section 10. The rear end of the storage cylinder 40 is located rearward of the mounting cap 30. The front of the storage cylinder 40 protrudes forward from the vertical supply tube section 10. The lower end of the storage cylinder 40 is integrally formed with the upper end of each of the vertical supply tube section 10 and the connecting tube section 20. A supply hole 41 is formed in the lower end of the front end of the storage cylinder 40, penetrating vertically and communicating between the inside of the storage cylinder 40 and the inside of the connecting cylinder portion 20. The supply hole 41 is located behind the occlusion plug 100. When the trigger portion 81 moves rearward, liquid that has passed through the vertical supply cylinder portion 10 and the connecting cylinder portion 20 is supplied through the supply hole 41 to the inside of the storage cylinder 40 (storage space 40a described below).

[0020] The storage plunger 50 is disposed in the storage cylinder 40 so as to be movable in the front-rear direction. The storage plunger 50 moves rearward (to one side) as liquid is supplied to the storage space 40a. The storage plunger 50 blocks communication between the vertical supply cylinder portion 10 and the ejection hole 4 through the connecting cylinder portion 20, and allows communication between the vertical supply cylinder portion 10 and the ejection hole 4 through the connecting cylinder portion 20 when it moves rearward. The storage plunger 50 has a sliding tube portion 50a that slides tightly in the front-rear direction over the entire circumference on the inner circumferential surface of the storage cylinder 40. A supply hole 41 opens in a portion of the storage cylinder 40 located forward of the sliding tube portion 50a (hereinafter referred to as storage space 40a). Liquid is stored in the storage space 40a from the vertical supply tube portion 10. The storage space 40a expands as the storage plunger 50 moves rearward with the supply of liquid. A support protrusion 50b is formed on the outer circumferential surface of the storage plunger 50 at a portion located rearward of the sliding cylindrical portion 50a, and extends continuously around the entire circumference.

[0021] The plunger biasing member 60 biases the storage plunger 50 that has moved rearward toward the front (the other side). In this embodiment, the plunger biasing member 60 biases the storage plunger 50 forward before the storage plunger 50 moves rearward. The plunger biasing member 60 is, for example, a metal coil spring. The front end of the plunger biasing member 60 abuts against the support protrusion 50b of the storage plunger 50 from behind the support protrusion 50b. The rear end of the plunger biasing member 60 is fitted into and fixed to the rear end of the storage cylinder 40. The injection tube portion 70 extends forward from the storage cylinder 40. The injection tube portion 70 communicates with the inside of the vertical supply tube portion 10 through the storage space 40a, the supply hole 41, and the inside of the connection tube portion 20.

[0022] The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, and a biasing member 84. The trigger mechanism 80 causes the liquid to flow from inside the vertical supply tube portion 10 through the connecting tube portion 20 toward the nozzle hole 4 side by the rearward movement of the trigger portion 81.

[0023] The main cylinder 82, the main piston 83, and the biasing member 84 are formed into a cylindrical shape extending in the front-rear direction, and are disposed coaxially with a common axis extending in the front-rear direction. Hereinafter, this common axis will be referred to as axis O3, the direction intersecting axis O3 as viewed from the front-rear direction will be referred to as cylinder radial direction, and the direction rotating around axis O3 as viewed from the front-rear direction will be referred to as cylinder circumferential direction.

[0024] The trigger portion 81 is disposed in front of the vertical supply tube portion 10 so as to be movable rearward in a forward biased state. The trigger portion 81 extends in the vertical direction and is disposed below the injection tube portion 70. The trigger portion 81 is provided in front of the main cylinder 82 and straddles the main piston 83 and the main cylinder 82 in the vertical direction. An upper end portion of the trigger portion 81 is journaled to the nozzle member 3 so as to be swingable in the front-rear direction. A stopper T is provided in the gap in the front-rear direction between the trigger portion 81 and the main cylinder 82. The stopper T restricts the rearward movement of the trigger portion 81 by contacting both the trigger portion 81 and the main cylinder 82. The stopper T is provided detachably in the gap. Note that the stopper T does not necessarily have to be provided.

[0025] As shown in FIGS. 2 and 3, the trigger portion 81 includes a pair of left and right side walls 81a, a front wall 81b, a pair of left and right push-in walls 81c, a first rib 81d, and a second rib 81e.

[0026] The pair of left and right side walls 81a are formed in a plate shape with the front and back surfaces facing the left and right direction. A rotation shaft 81f is formed at the upper end of the side wall 81a, protruding outward in the left and right direction and supported by the nozzle member 3 so as to be swingable in the front and rear direction. The rear end edge of the side wall 81a extends forward from above to below and presents a curved shape protruding backward when viewed from the left and right direction. The front wall 81b connects the front ends of the pair of left and right lateral walls 81a to each other. The front wall 81b is formed in a plate shape whose front and back surfaces face in the front-rear direction. The pair of left and right push-in walls 81c protrude rearward from the front wall 81b and are formed in a plate shape with the front and back surfaces facing the left and right direction. The push-in walls 81c are provided on both left and right sides of the front wall 81b, sandwiching the center in the left and right direction. A gap is provided in the left and right direction between the push-in walls 81c and the side wall 81a. This gap is narrower than the gap between the pair of left and right push-in walls 81c. The rear end edge of the push-in wall 81c extends forward from the top to the bottom and is located behind the rear end edge of the side wall 81a. The push-in wall 81c is formed with a locking protrusion 81g that protrudes inward in the left and right direction and locks the front end of the main piston 83. Recesses that are recessed from the outside to the inside in the left and right direction are formed at both left and right ends of the front end of the main piston 83, and the locking protrusions 81g are inserted into these recesses. The locking projection 81g is provided at the center in the up-down direction at the rear of the pushing wall 81c The locking projection 81g is located forward of the rear end edge of the lateral wall 81a. The first rib 81d connects the pair of left and right push-in walls 81c and is formed in a plate shape with the front and back surfaces facing the up-down direction. Two first ribs 81d are provided with a gap in the up-down direction, and connect the upper ends of the push-in walls 81c to each other and connect the lower ends of the push-in walls 81c to each other, respectively. The second rib 81e connects the pushing wall 81c and the side wall 81a in the left-right direction. The second rib 81e is provided over the entire length of the side wall 81a in the front-rear direction. The second rib 81e is provided in the center of the pushing wall 81c in the up-down direction.

[0027] In this embodiment, the trigger portion 81 is provided with a protruding portion 85 that protrudes rearward, is inserted into a gap in the cylinder diameter direction between the inside of the biasing member 84 and the main piston 83, and is in contact with or close to the biasing member 84. The protruding portions 85 are disposed separately on both sides of the main piston 83 in the left-right direction. The protruding portion 85 is inserted into the front end portion of the biasing member 84. The protruding portion 85 is located in the center of the biasing member 84 in the up-down direction. The protrusion 85 protrudes rearward from the rear end edge of the pushing wall 81c. The protrusion 85 bulges outward in the left-right direction from the pushing wall 81c, and the outer end of the protrusion 85 in the left-right direction is located in the left-right gap between the side wall 81a and the pushing wall 81c when viewed from the front-rear direction. The size of the protrusion 85 in the left-right direction decreases with increasing distance from the center of the protrusion 85 in the up-down direction. The lower part 85a of the outer surface of the protrusion 85 facing outward in the left-right direction is inclined so as to extend along the inner peripheral surface of the biasing member 84 when viewed from the front-rear direction. The protrusion 85 and the locking projection 81g are positioned in the same up-down direction. The protrusion 85 and the locking projection 81g intersect with the axis O3 when viewed from the left-right direction.

[0028] As shown in FIG. 1, between the lower end of the connecting tube portion 20 and the upper end of the mounting cap 30, there is provided a bottomed, cylindrical main cylinder mounting tube portion 110 that protrudes forward from the vertical supply tube portion 10, opens forward, and has a closed rear end opening. The main cylinder 82 is fitted into the main cylinder mounting tube portion 110 and is disposed behind the trigger portion 81. The main cylinder 82 is formed in a bottomed tube shape that opens forward and has a closed rear end opening. A communication passage 2a that communicates between the inside of the main cylinder 82 and the inside of the vertical supply tube portion 10 is formed in the bottom wall of each of the main cylinder 82 and the main cylinder mounting tube portion 110.

[0029] The main piston 83 is fitted in the main cylinder 82 so as to be movable in the front-rear direction. The main piston 83 moves in the front-rear direction in conjunction with the movement of the trigger portion 81 in the front-rear direction. The inside of the main cylinder 82 is pressurized and depressurized with the movement of the main piston 83 in the front-rear direction. The main piston 83 is formed in a topped cylindrical shape that opens toward the rear and has a closed front end opening. The rear end of the main piston 83 is fitted in the main cylinder 82 so as to be slidable in the front-rear direction. The main piston 83 protrudes forward from inside the main cylinder 82. The front end of the main piston 83 is inserted into a space surrounded by the first rib 81d and the push-in wall 81c, and is connected to the trigger portion 81. The main piston 83 is urged forward by the urging force of the urging member 84 via the trigger portion 81.

[0030] The urging member 84 is, for example, a metal coil spring. As shown in Fig. 4, an end surface 84a of the wire material constituting the coil spring faces the circumferential direction of the cylinder, and thus a step in the front-rear direction is provided at the front end opening edge of the urging member 84 that faces forward and against which the trigger portion 81 abuts. The urging member 84 is provided between the rear end portion of the main piston 83 and the trigger portion 81. The urging member 84 is provided at a position where it does not come into contact with the liquid. The front end opening edge of the urging member 84 abuts against the rear end edge of the push-in wall 81c of the trigger portion 81. The rear end of the urging member 84 is supported by a spring receiver 130 attached to the front end opening of the main cylinder 82. A portion of the main piston 83 located between the rear end and the trigger portion 81 is inserted inside the urging member 84. The urging member 84 is disposed coaxially with the main piston 83 and the main cylinder 82, and urges the trigger portion 81, to which the front end of the main piston 83 is connected, forward. The biasing member 84 may be made of, for example, resin, or may be made of other elastic materials.

[0031] The spring bearing 130 is formed in a cylindrical shape extending in the front-rear direction, and is inserted and fixed in the main cylinder 82. The rear part of the urging member 84 is inserted into the spring bearing 130. As shown in FIG. 2, an annular receiving portion 131 is formed at the rear end of the spring bearing 130, which protrudes toward the inside in the cylinder radial direction and extends continuously over the entire length in the cylinder circumferential direction. The main piston 83 is inserted inside the receiving portion 131. The receiving portion 131 is located forward of the rear end of the main piston 83. The rear end opening edge of the urging member 84 abuts against the front surface of the receiving portion 131.

[0032] Here, the ejector main body 2 is provided with a pair of side wall portions 135 that cover the urging member 84 from both the left and right sides. In the illustrated example, the side wall portion 135 protrudes forward from the spring bearing 130 and is formed in a plate shape with the front and back surfaces facing the left and right direction. The front ends of the pair of side wall portions 135 cover the rear end portion of the trigger portion 81 from the outside in the left and right direction. The front end portion of the side wall portion 135 abuts or is close to the outer surface of the lateral wall 81a of the trigger portion 81 facing outward in the left and right direction in the left and right direction.

[0033] 1, the ball valve 90 and the storage valve 91 are provided in the vertical supply tube 10. In the vertical supply tube 10, at a portion located between the ball valve 90 and the storage valve 91, a communication passage 2a opens.

[0034] The ball valve 90 serves as a check valve that blocks communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tube section 10 when pressure is applied inside the main cylinder 82, and allows communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tube section 10 by displacing upward when pressure is reduced inside the main cylinder 82. The storage valve 91 is disposed above the ball valve 90. The storage valve 91 is a check valve that allows the supply of liquid from the vertical supply tube portion 10 through the connecting tube portion 20 to the storage space 40a and restricts the outflow of liquid from the storage space 40a through the connecting tube portion 20 to the vertical supply tube portion 10.

[0035] (Nozzle member) The nozzle member 3 has an ejection hole 4 for ejecting liquid, and is attached to the ejector body 2. The nozzle member 3 includes an attachment tube portion 120 fitted onto the front of the ejection tube portion 70, and a nozzle tube 122 attached to the front end of the attachment tube portion 120. The nozzle tube 122 is formed with an ejection hole 4 that opens forward and ejects liquid forward.

[0036] (Attachment cap) The mounting cap 30 is formed in a topped cylinder shape having an annular top wall. The lower end of the vertical supply tube portion 10 is inserted inside this top wall. A regulating tube 31 protruding upward is formed on the inner peripheral edge of the top wall. The upper end opening edge of the regulating tube 31 abuts or is close to the outer surface of the ejector body 2 (in the illustrated example, the lower end of the outer peripheral surface of the main cylinder mounting tube portion 110) in the vertical direction. The regulating tube 31 surrounds the entire circumference of the insertion protrusion 11a and the insertion recess 12a of the vertical supply tube portion 10. It is not necessary to provide the regulating tube 31 in the mounting cap 30.

[0037] (cover) The cover 5 covers the ejector body 2 while exposing the ejection hole 4. The cover 5 covers the entire vertical supply tube portion 10 of the ejector body 2 except for the lower end portion, the entire injection tube portion 70, and the entire storage cylinder 40 from at least both left and right sides and from above.

[0038] (Function of trigger-type liquid ejector) Next, a case will be described where the trigger type liquid ejector 1 configured as described above is used. It is assumed that liquid is filled into each part of the trigger type liquid ejector 1 by operating the trigger part 81 shown in FIG.

[0039] When the trigger portion 81 is pulled and moved backward against the biasing force of the biasing member 84, the main piston 83 moves backward and the inside of the main cylinder 82 is pressurized. As a result, the liquid in the main cylinder 82 is supplied into the vertical supply tube portion 10 through the communication passage 2a. The liquid supplied into the vertical supply tube portion 10 presses the ball valve 90 downward and pushes the storage valve 91 up.

[0040] As a result, the liquid in the vertical supply tube portion 10 is supplied to the storage space 40a of the storage cylinder 40 through the connecting tube portion 20 and the supply hole 41, and the storage space 40a is pressurized. As the storage space 40a is pressurized, the storage plunger 50 moves rearward against the biasing force of the plunger biasing member 60, and the liquid fills the storage space 40a. As the storage plunger 50 moves rearward, the liquid in the storage space 40a, whose pressure has increased, reaches the ejection hole 4 through the injection tube portion 70. As a result, the liquid is ejected forward from the ejection hole 4.

[0041] As described above, every time the trigger portion 81 is pulled rearward, liquid can be ejected from the ejection hole 4, and the storage plunger 50 can be moved rearward to store liquid in the storage space 40a.

[0042] Thereafter, when the trigger portion 81 is released, the trigger portion 81 moves forward due to the elastic restoring force (biasing force) of the biasing member 84, and the main piston 83 connected to the trigger portion 81 also moves forward in the main cylinder 82. As a result, the pressure inside the main cylinder 82 is reduced to a pressure lower than the pressure inside the container body A, and the ball valve 90 rises while the storage valve 91 remains closed. Therefore, the liquid inside the container body A is sucked up into the vertical supply tube portion 10 and introduced into the main cylinder 82 through the communication passage 2a. This makes it possible to prepare for the next ejection.

[0043] When the pulling of the trigger portion 81 is stopped, the supply of liquid to the storage space 40a through the vertical supply tube portion 10 and the connecting tube portion 20 stops, but the storage plunger 50 starts to move forward due to the biasing force of the plunger biasing member 60. At this time, the outflow of liquid from the storage space 40a to the vertical supply tube portion 10 is regulated by the storage valve 91. As a result, the liquid filled in the storage space 40a reaches the ejection hole 4 through the injection tube portion 70 and continues to be ejected forward through the ejection hole 4. In this way, liquid can be ejected not only when the trigger portion 81 is pulled rearward, but also when the trigger portion 81 is not operated, and liquid can be ejected continuously.

[0044] As described above, according to the trigger-type liquid ejector 1 of this embodiment, the trigger portion 81 is provided with a protruding portion 85 that protrudes rearward and is inserted into the left-right gap between the inside of the urging member 84 and the main piston 83, and the protruding portions 85 are arranged separately on both sides of the main piston 83 in the left-right direction. Therefore, even if the urging member 84 attempts to bend left-right when the trigger portion 81 is moved rearward, the urging member 84 is supported in the left-right direction by the protruding portion 85, and the urging member 84 can be prevented from bending left-right.

[0045] When the biasing member 84 is a coil spring and the end face 84a of the wire constituting the coil spring faces in the circumferential direction of the cylinder, and a step in the front-to-rear direction is provided at the front end opening edge of the biasing member 84 that faces forward and with which the trigger portion 81 abuts, it is considered that the biasing member 84 will be easily bent in the left-right direction when the trigger portion 81 is moved rearward. However, even with this type of biasing member 84, by providing the aforementioned protrusion 85 on the trigger portion 81, it is possible to prevent the trigger portion 81 from bending in the left-right direction when the trigger portion 81 is moved rearward.

[0046] Since the ejector main body 2 is provided with a pair of side wall portions 135 that cover the urging member 84 from both the left and right sides, the urging member 84 provided between the rear end of the main piston 83 and the trigger portion 81 is covered from both the left and right sides by the pair of side wall portions 135, making it difficult to see from the outside and preventing liquid, etc., scattered by spray from adhering to the urging member 84. As described above, the protrusion 85 makes it possible to prevent the biasing member 84 from bending in the left-right direction when the trigger portion 81 is moved rearward, thereby preventing the biasing member 84 from contacting the side wall portion 135.

[0047] Since the ejector body 2 is provided with the storage cylinder 40 and the storage plunger 50, it is possible to perform continuous ejection of liquid as described above.

[0048] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. The embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by a person skilled in the art, those that are substantially the same, those that are within the scope of the equivalents, and the like.

[0049] For example, the ejector body 2 does not necessarily have to include the storage cylinder 40, the storage plunger 50, the plunger biasing member 60, and the side wall portion 135. Three or more protruding portions 85 may be provided at intervals in the circumferential direction of the cylinder.

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

[0051] 1 Trigger-type liquid ejector 2 Squirt body 3 Nozzle material 4 Spout hole 10 Vertical supply tube 40 Storage Cylinder 50 Reservoir Plunger 80 Trigger Mechanism 81 Trigger section 82 Main Cylinder 83 Main piston 84 Pressing member 85 Protrusion 135 Side wall A Container body O2 center axis

Claims

1. An ejector body that is attached to a container that contains a liquid; a nozzle member that is attached to the ejector body and has an ejection hole for ejecting liquid; The ejector body includes: A vertical supply tube portion that sucks up the liquid in the container body; a trigger mechanism including a trigger portion disposed 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, The trigger mechanism includes: A biasing member that biases the trigger portion forward; A main cylinder disposed rearward of the trigger portion and extending in the front-rear direction; a main piston having a front end connected to the trigger portion and a rear end fitted in the main cylinder so as to be slidable forward and backward; The biasing member is provided between a rear end portion of the main piston and the trigger portion, and is formed in a cylindrical shape extending in the front-rear direction, The main piston is inserted inside the biasing member, The trigger portion is provided with a protrusion that protrudes rearward and is inserted into a gap between the biasing member and the main piston, A trigger-type liquid ejector, wherein the protrusions are disposed on both sides of the main piston in a left-right direction perpendicular to the up-down direction and the front-rear direction.

2. 2. The trigger type liquid ejector according to claim 1, wherein the ejector body includes a pair of side walls covering the biasing member from both left and right sides.

3. The ejector body includes: a storage cylinder into which the liquid that has passed through the vertical supply tube portion is supplied by the rearward movement of the trigger portion; 3. The trigger-type liquid ejector of claim 1, further comprising: a storage plunger arranged within the storage cylinder so as to be movable in an axial direction along the central axis of the storage cylinder, and which moves toward one side in the axial direction and is biased toward the other side in the axial direction as liquid is supplied into the storage cylinder.

Images