Trigger-type liquid ejector

Abstract

To provide a trigger type liquid ejector which prevents contact between an energizing a piston and liquid, and continuously ejects the liquid.SOLUTION: A trigger type liquid ejector 1 comprises a trigger mechanism 80 that has a trigger part 81 which is so located as to be movable backward in a forward energized state, and that circulates the liquid toward an ejection hole side from an interior of a vertical supply cylinder part by a backward movement of the trigger part 81. The trigger mechanism 80 comprises: a main cylinder 82 which opens forward and of which a rear part communicates with the interior of the vertical supply cylinder part; a main piston 83 having a slide part 85, which is so located in the main cylinder 82 as to be movable in a cross direction, and a protrusion 86 which projects forward toward an exterior of the main cylinder 82 from the slide part 85 and of which a front end part 86a is connected to the trigger part 81; and a coil spring 84 into which the protrusion 86 of the main pinson 83 is inserted, and which energizes the tripper part 81 forward.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] There is known a trigger type liquid ejector that sucks up liquid from a container by operating a trigger part and ejects the liquid through an ejection hole. The trigger type liquid ejector described in the following Patent Document 1 includes a piston that moves back and forth with the movement of the trigger part, a cylinder whose inside is pressurized and depressurized with the movement of the piston and whose inside is connected to the inside of the vertical supply tube part, and a biasing member that is arranged inside the cylinder and biases the trigger part forward via the piston.

[0003] Furthermore, the trigger-type liquid ejector described in Patent Document 1 below comprises a storage cylinder into which liquid that has passed through the vertical supply tube section is supplied as the trigger section moves rearward, and a storage plunger disposed within the storage cylinder and moves toward one side in the axial direction as liquid is supplied into the storage cylinder and is biased toward the other side, enabling continuous ejection of liquid. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-159841 Summary of the Invention [Problem to be solved by the invention]

[0005] The trigger-type liquid sprayer is required to continuously spray various kinds of liquids, including mold removers containing hypochlorite for use in bathrooms. However, depending on the type of liquid, the urging member may deteriorate when in contact with the liquid, causing the movement of the piston and the operation of the trigger to become slow, or the liquid itself may change quality when in contact with the urging member.

[0006] The present invention has been made in consideration of the above circumstances, and its object is to provide a trigger-type liquid ejector that can suppress contact between the liquid and the biasing member that biases the trigger portion, and can eject liquid continuously. [Means for solving the problem]

[0007] (1) A trigger type liquid ejector according to the present invention comprises an ejector body attached to a container body containing liquid, and a nozzle member attached to the ejector body and having an ejection hole for ejecting liquid, the ejector body having a vertical supply tube section that sucks up liquid in the container body, and a trigger section arranged to be movable rearward in a forward biased state, the trigger mechanism causing liquid to flow from within the vertical supply tube section toward the ejection hole side by the rearward movement of the trigger section, a storage cylinder into which liquid that has passed through the vertical supply tube section is supplied by the rearward movement of the trigger section, and a nozzle member having a central axis of the storage cylinder disposed within the storage cylinder. and a storage plunger that is arranged to be movable in an axial direction along the vertical supply tube portion and moves toward one side in the axial direction as liquid is supplied into the storage cylinder and is urged toward the other side. The trigger mechanism comprises a main cylinder that opens to the front and communicates at its rear with the interior of the vertical supply tube portion, a sliding part that is arranged inside the main cylinder and is movably in the front-to-rear direction, a main piston that protrudes forward from the sliding part toward the outside of the main cylinder and has a protrusion whose front end is connected to the trigger portion, and a biasing member into which the protrusion of the main piston is inserted and which urges the trigger portion forward.

[0008] According to the trigger type liquid ejector of the present invention, the liquid can be circulated from the vertical supply tube to the ejection hole by operating the trigger to move it backward. This allows the liquid to be ejected to the outside through the ejection hole of the nozzle member. Moreover, the liquid can be supplied from the vertical supply tube to the storage cylinder to pressurize the storage cylinder. Therefore, the storage plunger can be pressed toward one side in the axial direction against the biasing force toward the other side in the axial direction, and the storage plunger can be moved toward one side in the axial direction while ejecting the liquid. Therefore, every time the trigger is pulled, the storage plunger can be moved to one side in the axial direction to eject the liquid while storing (filling) the liquid in the storage cylinder. After the liquid is filled into the storage cylinder, when the operation of the trigger is stopped, the supply of liquid into the storage cylinder through the vertical supply tube is stopped, but the storage plunger starts to move back toward the other side in the axial direction. This allows the liquid filled in the storage cylinder to be pushed out from the storage cylinder toward the ejection hole, and ejected from the ejection hole. This makes it possible to eject the liquid continuously.

[0009] The trigger portion is biased forward by a biasing member. In particular, a protrusion of the main piston, which protrudes outward from a front opening of the main cylinder and has a front end connected to the trigger portion, is inserted inside the biasing member. Therefore, the trigger portion can be biased by disposing the biasing member outside the space surrounded by the main cylinder and the main piston. This prevents the liquid drawn up into the main cylinder from coming into contact with the urging member and reacting with it, thus preventing deterioration of the urging member and alteration of the liquid, making the trigger-type liquid ejector suitable for continuous ejection of liquid.

[0010] (2) A spring support may be provided which is attached to an opening at the front of the main cylinder and receives a rear end of the urging member.

[0011] In this case, the spring receiver can be attached to the front opening of the main cylinder, and a biasing member can be disposed between the spring receiver and the trigger portion. The spring receiver can also prevent the main piston from coming out of the front opening of the main cylinder.

[0012] (3) The spring receiver may include a pair of side walls that sandwich the biasing member in the left-right direction.

[0013] In this case, the biasing member disposed outside the space surrounded by the main cylinder and the main piston is sandwiched between the pair of left and right side walls to make it difficult to see from the outside, improving the design. In addition, the pair of left and right side walls can prevent liquid, etc., scattered by spray from adhering to the biasing member.

[0014] (4) The spring bearing may include an inner cylindrical portion that is inserted into the main cylinder, and a bearing portion that is formed inside the inner cylindrical portion and that receives the rear end of the urging member.

[0015] In this case, since the inner cylindrical portion of the spring bearing is inserted into the inside of the main cylinder, it is easy to attach the spring bearing to the main cylinder. Also, the inner cylindrical portion inserted into the inside of the main cylinder can prevent the main piston sliding inside the main cylinder from slipping out in the forward direction. Effect of the Invention

[0016] According to the trigger type liquid ejector of the present invention, contact between the liquid and the biasing member that biases the trigger portion is suppressed, and the liquid can be ejected continuously. [Brief description of the drawings]

[0017] [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 an enlarged view of a main part of the trigger type liquid ejector shown in FIG. [Diagram 3] FIG. 1 is a front view of a trigger type liquid ejector according to an embodiment of the present invention. [Figure 4]FIG. 1 is a side view of a trigger-type liquid ejector according to an embodiment of the present invention. [Diagram 5] 1 is a side view showing a state in which a trigger portion of a trigger-type liquid ejector according to an embodiment of the present invention is pulled. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings. In this embodiment, a ejection container having a trigger type liquid ejector attached to a container body will be described as an example.

[0019] As shown in Figure 1, the trigger-type liquid ejector 1 of this embodiment comprises a ejector body 2 which is attached to a container body A that contains liquid, a nozzle member 3 which is attached to the ejector body 2 and has an ejection hole 4 for ejecting the liquid, and a cover body 5 which covers the ejector body 2 and the nozzle member 3. Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

[0020] (Ejector body) The ejector body 2 mainly comprises a vertical supply tube portion 10, a connecting tube portion 20, an attachment cap 30, 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.

[0021] In this embodiment, the central axis of the vertical supply tube portion 10 is defined as an axis O1, the container body A side along this axis O1 is defined as the lower side, the opposite side is defined as the upper side, and the direction along the axis O1 is defined as the up-down direction. In addition, in a plan view seen from the up-down direction, a direction intersecting the axis O1 is defined as the front-rear direction, and a direction perpendicular to both the up-down direction and the front-rear direction is defined as the left-right direction.

[0022] Furthermore, in this embodiment, the central axis of the storage cylinder 40 is defined as an axis O2. In this embodiment, the axis O2 extends in the front-rear direction. Therefore, in this embodiment, the front-rear direction corresponds to the axial direction along the central axis of the storage cylinder 40. In this embodiment, the rear corresponds to one side of the axial direction along the central axis of the storage cylinder 40, and the front corresponds to the other side of the axial direction along the central axis of the storage cylinder 40. However, the axial direction along the axis O2 does not have to coincide with the front-rear direction.

[0023] The vertical supply tube portion 10 extends in the vertical direction and has the function of sucking up the liquid inside 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 11 that extends in the vertical direction and sucks up liquid from the container body A is fitted into the vertical supply tube portion 10.

[0024] As shown in FIG. 1, the vertical supply tube portion 10 is provided at its upper end with a connecting tube portion 20 extending forward. The connecting tube part 20 is formed in a cylindrical shape having an opening 21 that opens to the front of the ejector body 2, and communicates with the inside of the vertical supply tube part 10. A blocking plug 100 is attached to the opening 21 of the connecting tube part 20 to block (seal) the opening 21.

[0025] A cylinder tube portion 110 is provided below the connection tube portion 20 and above the mounting cap 30. The cylinder tube portion 110 protrudes forward from the vertical supply tube portion 10 and opens forward. The main cylinder 82 is fitted into the cylinder tube portion 110. The main cylinder 82 is formed in a bottomed tube shape that opens forward and is closed at the rear. The inside of the main cylinder 82 is connected to the inside of the vertical supply tube portion 10.

[0026] The storage cylinder 40 is disposed above the vertical supply tube portion 10 and the connecting tube portion 20 . In this embodiment, the lower end of the storage cylinder 40 is integrally formed with the upper end of the vertical supply tube portion 10 and the upper end of the connection tube portion 20. The liquid that has passed through the vertical supply tube portion 10 and the connecting tube portion 20 is supplied to the inside of the storage cylinder 40 (a storage space 40a described later) by the rearward swinging of the trigger portion 81. Specifically, a supply hole 41 that communicates with the inside of the connecting tube portion 20 is formed in the lower part of the front end portion of the storage cylinder 40. The supply hole 41 opens to a part located rearward of the blocking plug 100 described later. This makes it possible to supply liquid that has passed through the vertical supply tube portion 10 and the connecting tube portion 20 to the storage cylinder 40 through the supply hole 41.

[0027] The storage plunger 50 is disposed so as to be movable in the front-rear direction along the axis O2 inside the storage cylinder 40. This allows the storage plunger 50 to slide tightly inside the storage cylinder 40 in the front-rear direction. The storage plunger 50 moves rearward as liquid is supplied into the storage cylinder 40. The storage plunger 50 blocks communication between the interior of the vertical supply tube portion 10 and the ejection hole 4 through the interior of the connecting tube portion 20, and allows communication between the interior of the vertical supply tube portion 10 and the ejection hole 4 through the interior of the connecting tube portion 20 when it moves rearward. That is, the storage plunger 50, at the forwardmost position, blocks communication between the interior of the vertical supply tube section 10 and the ejection hole 4 (in the injection tube section 70) through the interior of the connection tube section 20, and allows communication between the interior of the vertical supply tube section 10 and the ejection hole 4 (in the injection tube section 70) through the interior of the connection tube section 20 when moved rearward from the forwardmost position. Note that in the storage cylinder 40, the space located forward of the storage plunger 50 functions as a storage space 40a.

[0028] The storage space 40a stores the liquid that passes through the vertical supply tube portion 10 and the connecting tube portion 20 and also passes through the supply hole 41. The storage space 40a expands as the storage plunger 50 moves rearward due to the supply of liquid. The storage space 40a can also communicate with the inside of the injection tube portion 70, which will be described later.

[0029] The plunger biasing member 60 biases the storage plunger 50 forward. The plunger biasing member 60 is disposed rearward of the storage plunger 50 within the storage cylinder 40. The plunger biasing member 60 biases the storage plunger 50 forward in the initial state before the trigger portion 81 is operated. As a result, the storage plunger 50 is located at the frontmost position. The plunger biasing member 60 is a metallic coil spring disposed coaxially with the axis O2. However, for example, a resin spring or other elastic members may be used as the plunger biasing member 60.

[0030] In the storage cylinder 40 and the storage plunger 50 configured as described above, it is possible to pressurize the liquid in the storage space 40a until the storage plunger 50 moves rearward. After that, when the liquid pressure in the storage space 40a reaches a predetermined value, the storage plunger 50 moves rearward against the plunger biasing member 60. This makes it possible to supply the liquid in the storage space 40a to the ejection hole 4 side. Therefore, the storage plunger 50 can function as a pressure accumulator valve.

[0031] The injection tube portion 70 extends forward from the storage cylinder 40. The injection tube portion 70 communicates with the interior of the vertical supply tube portion 10 through the interior of the storage cylinder 40 (storage space 40a) and the interior of the connecting tube portion 20. This allows the injection tube portion 70 to guide the liquid that has passed through the interior of the vertical supply tube portion 10, the interior of the connecting tube portion 20, and the interior of the storage cylinder 40 (storage space 40a) to the ejection hole 4.

[0032] The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, and a coil spring 84 (biasing member). The trigger mechanism 80 is capable of circulating the liquid from inside the vertical supply tube portion 10 through the connecting tube portion 20 toward the nozzle hole 4 side by the rearward swinging of the trigger portion 81.

[0033] 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 is formed so as to extend in the vertical direction, and is disposed below the injection tube portion 70. The 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, and the lower end portion is disposed in front of the main cylinder 82.

[0034] In the illustrated example, 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 swing of the trigger portion 81 by abutting against both the trigger portion 81 and the main cylinder 82. However, the stopper T is not essential and may not be provided.

[0035] The main piston 83 is disposed inside the main cylinder 82 so as to be movable in the front-rear direction. The main piston 83 is movable in the front-rear direction in conjunction with the swinging of the trigger portion 81. As a result, the inside of the main cylinder 82 is pressurized and depressurized as the main piston 83 moves in the front-rear direction. The main piston 83 is formed in a topped cylindrical shape that is open to the rear and closed at the front.

[0036] The main piston 83 is biased forward via the trigger portion 81 by the biasing force of the coil spring 84. As the trigger portion 81 swings rearward, the main piston 83 moves rearward and is pushed into the main cylinder 82. When the trigger portion 81 is at the forward-most swing position, the main piston 83 is located at the corresponding forward-most position.

[0037] The coil spring 84 is made of, for example, metal. The coil spring 84 is disposed coaxially with the main piston 83 and the main cylinder 82, and biases the trigger portion 81, to which the main piston 83 is connected, forward. The coil spring 84 is disposed between the trigger portion 81 and a spring receiver 130 (spring receiver) attached to an opening at the front of the main cylinder 82. However, the material of the coil spring 84 is not limited to metal, and for example, a resin spring or the like may be used.

[0038] The ball valve 90 and the storage valve 91 are provided in the vertical supply tube portion 10 . The ball valve 90 is a check valve that blocks communication between the inside of the container body A and the inside of the main cylinder 82 through the vertical supply tube section 10 when the inside of the main cylinder 82 is pressurized, and allows communication between the inside of the container body A and the inside of the main cylinder 82 through the vertical supply tube section 10 by displacing upward when the inside of the main cylinder 82 is depressurized.

[0039] A storage valve 91 is disposed above the ball valve 90. The storage valve 91 is a check valve that allows liquid to be supplied from the vertical supply tube portion 10 through the connecting tube portion 20 to the storage cylinder 40 and prevents liquid from flowing out from the storage cylinder 40 through the connecting tube portion 20 to the vertical supply tube portion 10.

[0040] The cover body 5 is formed so as to cover the entire vertical supply tube portion 10 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 above.

[0041] (Nozzle member) The nozzle member 3 is assembled to the ejector body 2 mainly by utilizing the ejection tube portion 70. The nozzle member 3 includes an attachment tube portion 120 fitted onto the injection tube portion 70 from the front, a nozzle shaft portion 121 located inside the front end portion of the attachment tube portion 120, and a nozzle cap 122 attached to the nozzle shaft portion 121. The nozzle cap 122 is formed with an ejection hole 4 that opens forward and ejects liquid forward.

[0042] (coil spring) In the trigger type liquid ejector 1 configured as above, the arrangement of the coil spring 84 and the structure around the coil spring 84 will be described.

[0043] As shown in Fig. 2, the main cylinder 82, which is a cylindrical cylinder with a bottom that opens forward, is provided with a cylindrical guide tube 82a that protrudes forward from the center of the rear wall. The front end of the guide tube 82a is located rearward of the front end of the main cylinder 82. The bottom of the guide tube 82a is formed in an annular shape, and a fitting tube portion 111 provided on the cylinder tube portion 110 is fitted inside. The front end of the fitting tube portion 111 protrudes inside the guide tube 82a. The guide tube 82a is disposed coaxially with the fitting tube portion 111.

[0044] In this embodiment, the central axis of the main cylinder 82, the guide tube 82a, the cylinder tube portion 110, and the fitting tube portion 111 extending in the front-rear direction is defined as the axis O3. Furthermore, in a plan view seen from the direction of the axis O3, a direction intersecting the axis O3 is defined as the radial direction, and a direction going around the axis O3 is defined as the circumferential direction.

[0045] The main piston 83 includes a sliding part 85 disposed inside the main cylinder 82 so as to be movable in the front-rear direction, and a protrusion 86 protruding forward from the sliding part 85 toward the outside of the main cylinder 82 and having a front end part 86a connected to the trigger part 81. The sliding part 85 is provided in an annular shape at the rear end part of the topped cylindrical main piston 83. A guide tube 82a is inserted inside the sliding part 85.

[0046] The sliding portion 85 includes an inner lip portion 85a that slides against the outer peripheral surface of the guide tube 82a, a lip connecting portion 85b that extends radially outward from the inner lip portion 85a, and an outer lip portion 85c that is connected to the radially outer side of the lip connecting portion 85b and slides against the inner peripheral surface of the main cylinder 82. The rear end of the inner lip portion 85a extends radially inward and slides against the outer peripheral surface of the guide tube 82a. This ensures sealing between the inner lip portion 85a and the outer peripheral surface of the guide tube 82a.

[0047] The lip connecting portion 85b is formed in an annular shape that connects the inner lip portion 85a and the outer lip portion 85c in the radial direction. The surface of the lip connecting portion 85b facing forward is formed in a flat shape. The outer lip portion 85c is formed in a pair at the front and rear, with the diameters increasing separately from the outer peripheral end of the lip connecting portion 85b toward the front and rear, and is in sliding contact with the inner peripheral surface of the main cylinder 82. This ensures sealing between the outer lip portion 85c and the inner peripheral surface of the main cylinder 82.

[0048] The protrusion 86 of the main piston 83 extends forward from the front end of the inner lip portion 85a and protrudes outward from the front opening of the main cylinder 82. A pair of recesses 86b recessed in the left-right direction are formed in the front end 86a of the protrusion 86. The recesses 86b extend in the up-down direction and are formed in a generally arcuate or semicircular shape that protrudes rearward. A connecting shaft 81d provided on the trigger portion 81 is inserted into the recesses 86b from the left-right direction.

[0049] The trigger portion 81 includes a pair of left and right side walls 81a, a front wall 81b connecting the pair of left and right side walls 81a, and a plurality of reinforcing ribs 81c connecting the front wall 81b and the pair of left and right side walls 81a at the rear side of the front wall 81b. An opening 81A is formed in the front wall 81b. A connecting shaft 81d is provided in the opening 81A and is connected to a front end portion 86a of a protrusion 86 inserted into the opening 81A.

[0050] The coil spring 84 is disposed outside the space surrounded by the main cylinder 82 and the main piston 83, and biases the trigger portion 81 forward with the protrusion 86 of the main piston 83 inserted inside. The front end of the coil spring 84 abuts against the trigger portion 81. In this embodiment, the front end of the coil spring 84 abuts against the rear ends of a pair of left and right side walls 81a of the trigger portion 81, the rear end of a reinforcing rib 81c disposed below the opening 81A, and the like.

[0051] A spring support for supporting the front end of the coil spring 84 on a flat surface may be provided on the rear side of the trigger portion 81. However, since the protrusion 86 of the main piston 83 is inserted inside the coil spring 84 and its position is restricted, there is no problem even if the front end of the coil spring 84 abuts obliquely against the trigger portion 81 as in this embodiment. There is also no problem even if the coil spring 84 is disposed so as to be curved in the middle portion in the front-rear direction.

[0052] A spring receiver 130 that receives the rear end of the coil spring 84 is attached to the front opening of the main cylinder 82. The spring receiver 130 is formed in an annular shape coaxial with the axis O3. The spring receiver 130 includes an inner cylindrical portion 131 that is inserted into the main cylinder 82, and a locking portion 132 that is connected to the inner cylindrical portion 131, extends to the radial outside of the cylinder cylindrical portion 110, and locks to the outside of the cylinder cylindrical portion 110.

[0053] The locking portion 132 includes an extension portion 132a extending upward from the upper front end of the inner tubular portion 131, and an insertion portion 132b extending rearward from the upper end of the extension portion 132a. The upper end of the extension portion 132a extends upward beyond the upper end of the cylinder tubular portion 110. The insertion portion 132b is inserted into the gap between the cylinder tubular portion 110 and the connecting tubular portion 20, on the radial outside of the cylinder tubular portion 110. A step is provided on the upper surface side of the insertion portion 132b, facing the occlusion plug 100 in the front-rear direction.

[0054] The inner cylinder portion 131 is inserted into the main cylinder 82 and extends rearward from a position where it is connected to the locking portion 132. The outer circumferential surface of the inner cylinder portion 131 is disposed with a gap relative to the entire circumference of the inner circumferential surface of the main cylinder 82. In other words, the inner cylinder portion 131 is suspended via the locking portion 132 and positioned in the front-rear direction. The rear end portion 131a of the inner cylinder portion 131 has a slightly reduced diameter relative to the inner circumferential surface of the main cylinder 82.

[0055] A rear end 131a of the inner cylinder portion 131 faces the lip connecting portion 85b in the front-rear direction and restricts the main piston 83 from slipping out forward. A groove portion 133 extending in the front-rear direction is formed on the outer circumferential surface of the inner cylinder portion 131. The groove portion 133 is formed to a certain depth at least on the lower part of the outer circumferential surface of the inner cylinder portion 131. The groove portion 133 forms a gap extending in the front-rear direction between the outer circumferential surface of the inner cylinder portion 131 and the inner circumferential surface of the main cylinder 82. The gap extends to the front opening of the main cylinder 82.

[0056] The protrusion 86 of the main piston 83 is inserted in the front-rear direction inside the inner cylindrical portion 131. Also, a receiving portion 134 that receives the rear end of the coil spring 84 is formed inside the inner cylindrical portion 131. The receiving portion 134 is a step formed on the front side of the rear end portion 131a of the inner cylindrical portion 131, and is formed in an annular shape coaxial with the axis O3.

[0057] The spring receiver 130 configured as described above has a pair of side walls 135 that protrude forward and sandwich the coil spring 84 in the left-right direction. The pair of side walls 135 cover the coil spring 84 from both the left and right sides. The pair of side walls 135 extend in the front-rear direction along the coil spring 84, and their front ends are disposed to sandwich the trigger portion 81 in the left-right direction. As shown in FIG. 3, the pair of side walls 135 are plate members that have a thickness in the left-right direction, and guide the pair of left and right side walls 81a of the trigger portion 81 in the front-rear direction.

[0058] (The action of the trigger-type liquid ejector) Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described. First, from the state shown in Fig. 4, the restriction on movement of the trigger part 81 by the stopper T is released. Next, as shown in Fig. 5, the trigger part 81 is operated so as to be pulled backward against the biasing force of the coil spring 84 (see Fig. 1). Note that by operating the trigger part 81 multiple times, each part of the trigger type liquid ejector 1 is filled with liquid, and the liquid can be sucked up into the vertical supply tube part 10.

[0059] When the trigger portion 81 is pulled backward against the biasing force of the coil spring 84, the main piston 83 moves backward from the frontmost position, and the inside of the main cylinder 82 is pressurized. As a result, the liquid in the main cylinder 82 is supplied to the vertical supply tube portion 10. The liquid supplied to the vertical supply tube portion 10 presses the ball valve 90 downward and pushes the storage valve 91 upward.

[0060] This allows the liquid in the vertical supply tube portion 10 to be supplied to the storage space 40a of the storage cylinder 40 through the connection tube portion 20 and the supply hole 41, and the storage space 40a can be pressurized. Therefore, as the storage space 40a is pressurized, the storage plunger 50 can be moved rearward from the most forward position against the biasing force of the plunger biasing member 60, and the liquid can be stored (filled) in the storage space 40a. By moving the storage plunger 50 rearward, the liquid in the storage space 40a, whose pressure has increased, can be guided to the ejection hole 4 through the injection tube portion 70. This allows the liquid to be ejected forward from the ejection hole 4.

[0061] 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.

[0062] Thereafter, when the trigger portion 81 is released, the trigger portion 81 moves forward due to the elastic restoring force (biasing force) of the coil spring 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 can be reduced to a pressure lower than the pressure inside the container body A, so that the ball valve 90 can be raised with the storage valve 91 kept closed. Therefore, the liquid inside the container body A can be sucked up into the vertical supply tube portion 10 and introduced into the main cylinder 82. This allows preparation for the next eruption.

[0063] Furthermore, when the operation of the trigger portion 81 toward the rear 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 begins to move forward toward the most forward position due to the biasing force of the plunger biasing member 60. At this time, the outflow of the liquid from the storage space 40a into the vertical supply tube portion 10 is regulated by the storage valve 91.

[0064] This allows the liquid stored in the storage space 40a to be guided through the inside of the ejection tube portion 70 to the ejection hole 4, and the liquid can be continuously 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.

[0065] As described above, according to the trigger-type liquid ejector 1 of this embodiment, liquid can be ejected not only when the trigger portion 81 is pulled backward, but also when the trigger portion 81 is not operated, and liquid can be ejected continuously. In addition, the upper end (fulcrum) of the trigger portion 81 is pivotally supported by the nozzle member 3 so as to be able to swing, and the main piston 83 is connected to the middle portion (point of application) of the trigger portion 81, so that, for example, by operating the lower end (point of application of force) of the trigger portion 81, the main piston 83 can be moved efficiently using the so-called principle of leverage. Therefore, the operability of the trigger portion 81 can be improved.

[0066] Furthermore, according to the trigger type liquid ejector 1 of this embodiment, the trigger portion 81 is biased forward by the coil spring 84, as shown in FIG. In particular, a protrusion 86 of a main piston 83, which protrudes outward from a front opening of the main cylinder 82 and has a front end 86a connected to the trigger portion 81, is inserted inside the coil spring 84. Therefore, the coil spring 84 can be disposed outside the space surrounded by the main cylinder 82 and the main piston 83 to bias the trigger portion 81. This prevents the liquid drawn up into the main cylinder 82 from coming into contact with and reacting with the coil spring 84. This prevents deterioration of the coil spring 84 and alteration of the liquid, making the trigger-type liquid ejector 1 suitable for continuous ejection of liquid.

[0067] Thus, the trigger type liquid ejector 1 according to this embodiment comprises an ejector body 2 that is attached to a container body A containing a liquid, and a nozzle member 3 that is attached to the ejector body 2 and has an ejection hole 4 formed therein for ejecting the liquid. The ejector body 2 has a vertical supply tube section 10 that sucks up the liquid in the container body A, and a trigger section 81 that is arranged so as to be movable rearward in a forward biased state, and a trigger mechanism 80 that causes the liquid to flow from within the vertical supply tube section 10 towards the ejection hole 4 side by the rearward movement of the trigger section 81, a storage cylinder 40 into which the liquid that has passed through the vertical supply tube section 10 is supplied by the rearward movement of the trigger section 81, and a nozzle member 3 that is attached to the ejector body 2 and has an ejection hole 4 formed therein for ejecting the liquid. The trigger mechanism 80 includes a main cylinder 82 that opens forward and communicates with the interior of the vertical supply tube portion 10 at its rear, a sliding portion 85 that is arranged inside the main cylinder 82 so as to be movable in the front-rear direction, a main piston 83 that protrudes forward from the sliding portion 85 toward the outside of the main cylinder 82 and has a protrusion 86 whose front end 86a is connected to the trigger portion 81, and a coil spring 84 into which the protrusion 86 of the main piston 83 is inserted and which urges the trigger portion 81 forward. With this configuration, contact between the coil spring 84 that urges the trigger portion 81 and the liquid is suppressed, and the liquid can be continuously sprayed.

[0068] Moreover, in this embodiment, there is provided a spring receiver 130 that is attached to the front opening of the main cylinder 82 and receives the rear end of the coil spring 84. According to this configuration, the spring receiver 130 can be attached to the front opening of the main cylinder 82, and the coil spring 84 can be disposed between the spring receiver 130 and the trigger portion 81. In addition, the spring receiver 130 can prevent the main piston 83 from coming out of the front opening of the main cylinder 82.

[0069] In this embodiment, the spring receiver 130 includes a pair of side walls 135 that sandwich the coil spring 84 in the left-right direction. With this configuration, the coil spring 84, which is disposed outside the space surrounded by the main cylinder 82 and the main piston 83, is sandwiched between the pair of left and right side walls 135, making it difficult to see from the outside, improving the design (see Figs. 4 and 5). In addition, the pair of left and right side walls 135 can prevent liquid, etc., scattered by spray from adhering to the coil spring 84. Furthermore, the pair of left and right side walls 135 can prevent the trigger portion 81 from being pulled obliquely (pulling in a manner that twists the pivot support portion of the trigger portion 81).

[0070] In this embodiment, the spring receiver 130 includes an inner cylinder portion 131 inserted into the main cylinder 82, a receiver portion 134 formed inside the inner cylinder portion 131 and receiving the rear end of the coil spring 84, and a groove portion 133 formed outside the inner cylinder portion 131 and forming a gap extending in the front-rear direction between the outer circumferential surface of the inner cylinder portion 131 and the inner circumferential surface of the main cylinder 82. According to this configuration, the inner cylinder portion 131 of the spring receiver 130 is inserted into the main cylinder 82, which makes it easy to attach the spring receiver 130 to the main cylinder 82. In addition, the inner cylinder portion 131 inserted into the main cylinder 82 can prevent the main piston 83 sliding inside the main cylinder 82 from slipping out forward. Furthermore, the groove 133 formed in the inner tube portion 131 of the spring receiver 130 creates a gap extending in the front-to-rear direction between the outer peripheral surface of the inner tube portion 131 and the inner peripheral surface of the main cylinder 82. Therefore, even if liquid leaks out from the gap between the inner peripheral surface of the main cylinder 82 and the sliding portion of the main piston 83 which slides against said inner peripheral surface, the liquid passes through the gap on the outside of the inner tube portion 131, thereby preventing the liquid from flowing around to the receiver portion 134 which receives the rear end of the coil spring 84 inside the inner tube portion 131 and preventing the liquid from coming into contact with the coil spring 84.

[0071] 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.

[0072] For example, in the above embodiment, the spring receiver 130 is attached to the front opening of the main cylinder 82, but the spring receiver 130 that receives the rear end of the coil spring 84 does not have to be attached. In this case, the rear end of the coil spring 84 may be supported on the front side of the lip connecting portion 85b of the main piston 83, for example.

[0073] In addition, for example, in the above embodiment, an example was given of a case in which a pair of left and right side wall portions 135 are used to prevent the trigger portion 81 from being pulled obliquely. However, the pair of left and right side wall portions 135 may not have a guide function for the trigger portion 81, and may only have a cover function for covering the coil spring 84.

[0074] Also, for example, only one locking portion 132 may be formed on the spring receiver 130, or multiple locking portions 132 may be formed at intervals in the circumferential direction. Furthermore, when only one locking portion 132 is formed, the locking portion 132 may be configured in a cylindrical shape that surrounds the cylinder tubular portion 110 from the outside in the radial direction. Also, the locking portion 132 may be locked to the outer circumferential surface of the cylinder tubular portion 110 by screwing or the like.

[0075] In addition, the components in the above-described embodiments can be replaced with well-known components as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0076] 1...trigger type liquid ejector, 2...ejector body, 3...nozzle member, 4...ejection hole, 5...cover body, 10...vertical supply tube portion, 11...pipe, 20...connection tube portion, 21...opening, 30...mounting cap, 40...storage cylinder, 40a...storage space, 41...supply hole, 50...storage plunger, 60...plunger biasing member, 70...ejection tube portion, 80...trigger mechanism, 81...trigger portion, 81a...side wall, 81A...opening, 81b...front wall, 81c...reinforcing rib, 81d...connecting shaft, 82...main cylinder, 82a...guide tube, 83...main piston, 84...coil spring (biasing member), 85... Sliding portion, 85a...inner lip portion, 85b...lip connecting portion, 85c...outer lip portion, 86...projection portion, 86a...front end portion, 86b...recess portion, 90...ball valve, 91...storage valve, 100...blocking plug, 110...cylinder tube portion, 111...fitting tube portion, 120...mounting tube portion, 121...nozzle shaft portion, 122...nozzle cap, 130...spring receiver (spring receiver), 131...inner tube portion, 131a...rear end portion, 132...locking portion, 132a...extension portion, 132b...insertion portion, 133...groove portion, 134...receiving portion, 135...side wall portion, A...container body, O1...axis, O2...axis, O3...axis, T...stopper

Claims

1. An ejector body that is attached to a container that contains a liquid; a nozzle member attached to the ejector body and having an ejection hole for ejecting liquid; 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 that is arranged to be movable rearward in a forward biased state, and that causes liquid to flow from inside the vertical supply tube portion toward the nozzle hole side by the rearward movement of the trigger portion; 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; a storage plunger disposed in the storage cylinder so as to be movable in an axial direction along a central axis of the storage cylinder, and which moves toward one side in the axial direction and is biased toward the other side as liquid is supplied into the storage cylinder; The trigger mechanism includes: a main cylinder having an opening at its front end and a rear end communicating with the inside of the vertical supply tube portion; a sliding part disposed inside the main cylinder so as to be movable in a front-rear direction; and a main piston having a protrusion protruding forward from the sliding part toward the outside of the main cylinder and having a front end connected to the trigger part; a biasing member into which the protrusion of the main piston is inserted and which biases the trigger portion forward; a spring receiver attached to a front opening of the main cylinder and receiving a rear end of the biasing member.

2. The trigger-type liquid ejector according to claim 1 , wherein the spring receiver includes a pair of side walls that sandwich the biasing member in the left-right direction.

3. The spring receiver is An inner cylinder portion that is inserted into the main cylinder; 3. The trigger type liquid ejector according to claim 1, further comprising: a receiving portion formed inside the inner cylindrical portion, the receiving portion receiving a rear end of the biasing member.

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