Trigger-type liquid ejector

Abstract

To provide a trigger type liquid sprayer which maintains appropriate sealable property by means of a closing plug.SOLUTION: A trigger type liquid sprayer 1 includes a sprayer main body 2 mounted on a container body A and a nozzle member 3 formed of a spray hole 4. The sprayer main body includes a vertical supply cylinder part 10, a connecting cylinder part 20 having an opening part 21, a trigger mechanism 80 having a trigger inserted part 81, a storage cylinder 40 in which liquid passing through vertical supply cylinder part interior and connecting cylinder part interior by movement to the rear side of the trigger part is supplied to an inner part through a supply hole 41 and a storage plunger 50 arranged movably within the storage cylinder. On the connecting cylinder part, a closing cock 100 mounted so as to close an opening part is provided. The closing cock includes a cock main body which is inserted to the inner side of the connecting cylinder part and closes the opening part and an outer cylinder which is formed so as to elongate over the whole periphery of the connecting cylinder part so as to surround the connecting cylinder part from the outside in the radiation direction and is inserted over the whole periphery to the outside of the connecting cylinder part.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Trigger-type liquid ejectors are known that suck up liquid from a container by operating a trigger portion and eject the liquid through an ejection hole. One known example of this type of trigger-type liquid ejector is shown in Patent Document 1 below, which comprises a ejector body that is attached to a container body that contains liquid, and a nozzle member that has an ejection hole for ejecting the liquid.

[0003] The ejector body mainly comprises a vertical supply tube section that sucks up the liquid in the container body, a connecting tube section that extends forward from the vertical supply tube section, a trigger section that is arranged so as to be movable rearward in a forward biased state and that ejects liquid through the vertical supply tube section and the connecting tube section toward the ejection hole side by moving rearward, a storage cylinder into which liquid that has passed through the vertical supply tube section and the connecting tube section is supplied by moving the trigger section rearward, and a storage plunger that is movably arranged within the storage cylinder, moves rearward as liquid is supplied into the storage cylinder, and is biased forward by a biasing member.

[0004] In the above-mentioned trigger type liquid ejector, by operating the trigger part, it is possible to eject the liquid from the ejection hole to the outside while storing the liquid in the storage cylinder. Furthermore, even if the trigger part is not operated, it is possible to eject the liquid by using the storage plunger. Therefore, it is possible to perform continuous ejection of the liquid. In addition, the connecting tube portion is often formed to have an opening, for example, in consideration of moldability. In this case, a blocking plug is attached so as to fit into the opening, thereby blocking (sealing) the opening. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-213497 A Summary of the Invention [Problem to be solved by the invention]

[0006] In a trigger-type liquid ejector having a storage cylinder, it is necessary to store liquid in the storage cylinder while moving the storage plunger backward, and therefore the liquid in the storage plunger is pushed out by moving the storage plunger forward with a biasing member. Therefore, the pressure inside the storage plunger and the connecting tube is easily increased. Therefore, high pressure acts on the blocking plug blocking the opening of the connecting tube, and stress is easily applied to the blocking plug to dislodge it from the opening. This may cause the blocking plug to be unintentionally displaced. As a result, for example, the sealing performance may be deteriorated, and problems such as liquid leakage may occur.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a trigger-type liquid ejector that can maintain an appropriate sealing performance provided by a blocking plug. [Means for solving the problem]

[0008] (1) A trigger type liquid ejector according to the present invention comprises an ejector body which is attached to a container body containing a liquid, and a nozzle member which is attached to the ejector body and has an ejection hole for ejecting the liquid, the ejector body having a vertical supply tube part which sucks up the liquid in the container body, a connecting tube part which extends from the vertical supply tube part and has an opening which opens to the outside of the ejector body, and a trigger part which is arranged so as to be movable rearward in a forward biased state, and a trigger mechanism which causes liquid to flow from within the vertical supply tube part through the connecting tube part towards the ejection hole side by the rear movement of the trigger part, and a supply hole which communicates with the connecting tube part is formed, and the rear movement of the trigger part causes liquid to flow from within the vertical supply tube part through the connecting tube part towards the ejection hole side, The device comprises a storage cylinder into which liquid that has passed through the connecting tubular portion is supplied inside through the supply hole, and a storage plunger that is arranged within the storage cylinder so as to be movable in the axial direction along the central axis of the storage cylinder, and moves toward one side in the axial direction and is biased toward the other side as liquid is supplied into the storage cylinder, and is characterized in that the connecting tubular portion is provided with a blocking plug attached to block the opening, and the blocking plug comprises a plug body that is fitted inside the connecting tubular portion and blocks the opening, and an outer tube that is formed to extend around the entire circumference of the connecting tubular portion so as to surround the connecting tubular portion from the radial outside, and is fitted around the entire outside of the connecting tubular portion.

[0009] According to the trigger type liquid ejector of the present invention, by operating the trigger part to move it backward, the liquid can be circulated from inside the vertical supply tube part through the connection tube part toward the ejection hole side. 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 inside the connection tube part through the supply hole into the storage cylinder to pressurize the inside of 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 part is pulled, the storage plunger can be moved to one side in the axial direction, and the liquid can be ejected while storing (filling) the liquid 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 and the connecting tube stops, 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 allows the liquid to be ejected continuously.

[0010] The opening of the connecting tube, which communicates with the vertical supply tube and the storage cylinder, is closed (sealed) by a blocking plug. In particular, the blocking plug is attached to the connecting tube by using a plug body fitted inside the connecting tube and an outer tube fitted around the entire circumference of the connecting tube. Therefore, even if the internal pressure of the connecting tube is high and the plug body is subjected to stress that would cause it to fall out of the opening, the blocking plug as a whole can be prevented from moving relative to the connecting tube by being sandwiched between the plug body and the outer tube. This makes it possible to prevent the occlusion plug from unintentionally shifting its position, maintain proper sealing of the opening, and prevent the occurrence of liquid leakage, etc.

[0011] In addition, when the internal pressure of the connecting tube is high, the connecting tube is likely to deform and expand radially outward due to the internal pressure. In this case, if the occlusion plug does not have an outer tube and only has a plug body, a gap may form between the plug body and the connecting tube, which may lead to liquid leakage, etc. However, since the outer tube of the occlusion plug is formed to extend around the entire circumference of the connecting tube so as to surround the connecting tube from the outside, and is fitted around the entire circumference of the outside of the connecting tube, the outer tube can be used to suppress deformation of the connecting tube that would cause it to expand radially outward. As a result, gaps are less likely to form between the plug body and the connecting tube, and high sealing performance can be achieved. These factors make it possible to create a trigger-type liquid ejector that is suitable for continuous ejection.

[0012] (2) The blocking plug may be formed integrally with the outer tube and have a locking piece that engages with the ejector body, and the locking piece may have an extension portion that extends along the connecting tube portion further than the outer tube toward the vertical supply tube portion, and a locking portion that is formed to protrude radially from the extension portion of the connecting tube portion and engages with an engaged portion formed on the ejector body.

[0013] In this case, the plug body and the outer tube are used to attach the occluding plug so as to sandwich the connecting tube portion in the radial direction, and the locking piece can be locked to the ejector body. Specifically, the locking portion formed on the extension portion is locked to the locked portion formed on the ejector body, so that the occluding plug can be prevented from coming off, and the occluding plug can be effectively prevented from moving so as to fall out of the opening. Therefore, even if the internal pressure of the connecting tube portion becomes high, the sealing performance of the opening can be more appropriately maintained. In particular, since the locking portion is formed on the extension portion, it is possible to lock the locking portion to the locked portion while appropriately bending the extension portion in the radial direction, for example, which makes it possible to easily attach the occlusion plug to the opening.

[0014] (3) The plug body may include a blocking wall that blocks the opening, an inner tube that is connected to the outer peripheral edge of the blocking wall and fitted inside the connecting tubular portion, and a flange portion that protrudes from the inner tube radially outward of the connecting tubular portion and contacts the opening edge of the connecting tubular portion.

[0015] In this case, since the plug body can be formed into a bottomed tubular shape having a blocking wall and an inner tube, the plug body can be formed to be lightweight, and since the amount of synthetic resin required to form the plug body can be reduced, for example, it is easy to achieve cost reduction. Furthermore, since the plug body can be attached to the inside of the connecting tubular part so that the flange part contacts the opening edge of the connecting tubular part, it is easy to determine the attachment position of the plug body and to perform the attachment work. Effect of the Invention

[0016] According to the present invention, a trigger-type liquid ejector capable of maintaining an appropriate sealing performance by a blocking plug can be provided. [Brief description of the drawings]

[0017] [Figure 1] 1 is a vertical cross-sectional view showing an embodiment of a trigger type liquid ejector according to the present invention. [Diagram 2] FIG. 2 is a front view of the trigger-type liquid ejector shown in FIG. 1. [Diagram 3] FIG. 2 is an enlarged cross-sectional view showing the periphery of the occlusion plug shown in FIG. 1. [Figure 4] 3 is a cross-sectional view of the occluding plug shown in FIG. 2 taken along the left-right direction of the trigger-type liquid ejector. FIG. [Diagram 5] FIG. 5 is a front view of the occlusion plug shown in FIG. 4. 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 Figures 1 and 2, the trigger-type liquid ejector 1 of this embodiment comprises a ejector body 2 that is attached to a container body A that contains liquid, a nozzle member 3 that is attached to the ejector body 2 and has an ejection hole 4 for ejecting the liquid, and a cover body 5 that 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 (vertical supply tube portion of the present invention) 10, a connecting tube portion 20, an attachment cap 30, a storage cylinder 40, a storage plunger 50, a 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 in the container body A. The vertical supply tube portion 10 is attached to the container body A by an attachment cap 30. The vertical supply tube portion 10 includes a topped cylindrical outer tube 12 and an inner tube 13 fitted into the outer tube 12. The axis O1 of the vertical supply tube portion 10 is located rearward of the container axis of the container body A.

[0024] The outer cylinder 12 includes a large diameter portion 12a, a small diameter portion 12b that is disposed above the large diameter portion 12a and has a smaller diameter than the large diameter portion 12a, and an annular connecting portion 12c that connects the upper end of the large diameter portion 12a and the lower end of the small diameter portion 12b. The small diameter portion 12b is formed in a cylindrical shape with a top and is disposed coaxially with the axis O1. A top wall portion 12d of the small diameter portion 12b is formed integrally with the storage cylinder 40.

[0025] The inner tube 13 includes a large diameter portion 13a, a small diameter portion 13b that is arranged above the large diameter portion 13a and has a smaller diameter than the large diameter portion 13a, and an annular connecting portion 13c that connects the upper end portion of the large diameter portion 13a and the lower portion of the small diameter portion 13b. The large diameter portion 13a is disposed within the large diameter portion 12a of the outer cylinder 12. A ring-shaped flange portion 13d that protrudes radially outward is formed on the portion of the large diameter portion 13a that protrudes downward from the large diameter portion 12a of the outer cylinder 12. The flange portion 13d is disposed on the upper end opening edge of the mouth portion A1 of the container body A via a packing 14. The flange portion 13d is sandwiched vertically between the upper end opening edge of the mouth portion A1 and the mounting cap 30 that is attached to the mouth portion A1 of the container body A by, for example, screwing. As a result, the entire ejector body 2 is attached to the mouth portion A1 of the container body A via the mounting cap 30.

[0026] The small diameter portion 13b is formed in a cylindrical shape and disposed coaxially with the axis O1. The small diameter portion 13b is open in both the up and down directions and disposed within the small diameter portion 12b of the outer cylinder 12. The upper end opening edge of the small diameter portion 13b is slightly spaced downward from the top wall portion 12d of the outer cylinder 12. The upper end of the pipe 15 extending in the up and down direction is fitted inside the lower part of the small diameter portion 13b. The lower end opening of the pipe 15 is located at the bottom (not shown) of the container body A.

[0027] The mounting cap 30 includes a lower cap 30a that surrounds the mouth A1 and the flange 13d of the container body A from the outside, and an upper cap 30b that is disposed above the lower cap 30a and has a smaller diameter than the lower cap 30a. As a result, the mounting cap 30 is formed into a multi-stage cylindrical shape with an outer diameter that changes in two stages. In particular, the upper cap 30b is disposed so as to surround from the outside the large diameter portion 13a of the inner cylinder 13 and the large diameter portion 12a of the outer cylinder 12, which are disposed in a double arrangement. As a result, the upper cap 30b surrounds and protects the large diameter portion 13a and the large diameter portion 12a, and prevents, for example, an external force from acting directly on the large diameter portion 13a and the large diameter portion 12a. The upper cap 30b is disposed so that the upper end opening edge of the upper cap 30b is adjacent to or abuts against the annular connecting portion 12c of the outer cylinder 12 from below.

[0028] A connecting tube portion 20 is provided at the upper end of the vertical supply tube portion 10 and extends 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. The blocking plug 100 will be described in detail later.

[0029] 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. A part of the cylinder tube portion 110 is integrally formed with the outer tube 12 of the vertical supply tube portion 10. The main cylinder 82 is fitted into the cylinder tube portion 110. The main cylinder 82 is formed in a bottomed cylindrical shape that is open at the front and closed at the rear. The inside of the main cylinder 82 is connected to the inside of the vertical supply tube portion 10.

[0030] The storage cylinder 40 is disposed above the vertical supply tube portion 10 and the connecting tube portion 20. The storage cylinder 40 extends in the front-rear direction and is disposed so as to straddle the vertical supply tube portion 10 in the front-rear direction. In the illustrated example, the storage cylinder 40 is disposed approximately parallel to the connecting tube portion 20 and the cylinder tube portion 110. Furthermore, the lower end portion of the storage cylinder 40 is integrally formed with the upper end portion of the vertical supply tube portion 10 and the upper end portion of the connecting tube portion 20.

[0031] 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 tubular portion 20 is formed in the lower portion of the front end portion of the storage cylinder 40 . Supply hole 41 opens into a portion of occlusion plug 100, which will be described later, located rearward of plug body 101. Supply hole 41 also opens into a lower portion of the front end of storage cylinder 40, in a direction intersecting axis O2. This makes it possible for the liquid that has passed through the vertical supply tube portion 10 and the connecting tube portion 20 to be supplied to the storage cylinder 40 through the supply hole 41.

[0032] 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.

[0033] 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.

[0034] The storage space 40a stores the liquid that passes through the vertical supply tube portion 10 and the connection 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.

[0035] The biasing member 60 biases the storage plunger 50 forward. The biasing member 60 is disposed rearward of the storage plunger 50 within the storage cylinder 40. The 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 biasing member 60 is a metal coil spring disposed coaxially with the axis O2. However, for example, a resin spring or other elastic members may be used as the biasing member 60.

[0036] 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 biasing member 60. This makes it possible to supply the liquid in the storage space 40a to the ejection hole 4 side.

[0037] 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.

[0038] The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, a coil spring 84, and a receiving member 85. 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.

[0039] 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 a relay member 120 (described later) so as to be swingable in the front-rear direction, and the lower end portion is disposed in front of the main cylinder 82.

[0040] 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.

[0041] The receiving member 85 comprises a receiving tube 85a fitted into the inside of the main cylinder 82 from the front, an annular flange portion 85b protruding from the front end of the receiving tube 85a toward the radially outward side of the main cylinder 82, and a connecting piece 85c extending rearward from the flange portion 85b and inserted between the connecting tube portion 20 and the main cylinder 82 from the front. The receiving cylinder 85a is located forward of the main piston 83. Therefore, the main piston 83 is movable in the front-rear direction within a region behind the receiving cylinder 85a within the main cylinder 82. The connecting piece 85c is fitted between the connecting cylinder portion 20 and the main cylinder 82. As a result, the entire receiving member 85 is integrally combined with the main cylinder 82.

[0042] A pair of guide plates 86 are formed on the flange portion 85b so as to face each other in the left-right direction with the trigger portion 81 therebetween. The guide plates 86 are formed so as to protrude forward from the flange portion 85b. The guide plates 86 are formed so as to be located on both the left and right sides of the trigger portion 81 when the trigger portion 81 is located at the frontmost swing position. This allows the trigger portion 81 to be moved rearward while being guided by the pair of guide plates 86. Therefore, it is possible to smoothly move the trigger portion 81 rearward while suppressing rattling in the left-right direction.

[0043] The coil spring 84 is made of, for example, metal. The coil spring 84 is disposed so as to surround the main piston 83 from the outside, and is disposed forward of the receiving cylinder 85a of the receiving member 85. The coil spring 84 is disposed in a compressed state so that the rear end portion contacts the receiving cylinder 85a and the front end portion contacts the trigger portion 81. As a result, the coil spring 84 biases the trigger portion 81 and the main piston 83 forward.

[0044] In particular, the coil spring 84 is disposed so as to surround the main piston 83 from the outside, and is therefore disposed outside the main cylinder 82. This makes it possible to prevent the liquid in the main cylinder 82 from coming into contact with the coil spring 84. This allows a wide range of materials to be selected for the coil spring 84 regardless of the type of liquid, and makes it easy to maintain the spring characteristics of the coil spring 84 over a long period of time. Therefore, the material for the coil spring 84 is not limited to metal, and for example, a resin spring or the like may be used. In addition, since the coil spring 84 is disposed inside the pair of guide plates 86, it is concealed by the guide plates 86. Therefore, it is possible to prevent the coil spring 84 from being directly visible from the outside, and it is possible to improve the design quality, etc.

[0045] As described above, the main piston 83 is biased forward together with 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] (Relay parts) Furthermore, relay member 120 that connects injection tube portion 70 and nozzle member 3 is attached to injection tube portion 70 configured as described above. The relay member 120 is attached to the injection tube portion 70 from the front. The relay member 120 is provided with an opposing wall portion 121 located forward of the injection opening 71 of the injection tube portion 70 and disposed opposite the injection opening 71, a first relay tube portion 122 extending rearward from the opposing wall portion 121 and fitted onto the injection tube portion 70, a second relay tube portion 123 extending forward from the opposing wall portion 121, and a guide shaft 124 located inside the second relay tube portion 123 and extending forward from the opposing wall portion 121.

[0050] A communication hole 125 communicating with the injection opening 71 of the injection tube portion 70 is formed in a portion of the opposing wall portion 121 that is located above the guide shaft 124 and inside the second relay tube portion 123. As a result, the inside of the second relay tube portion 123 communicates with the inside of the injection tube portion 70 through the communication hole 125. A first switching groove 126 extending in the front-rear direction is formed on the outer circumferential surface of the guide shaft 124. A plurality of first switching grooves 126 are formed around the axis of the guide shaft 124 at intervals.

[0051] (Nozzle member) The nozzle member 3 is attached to the second relay cylindrical portion 123. As a result, the nozzle member 3 is attached to the ejector main body 2 via the relay member 120. The nozzle member 3 is provided with a nozzle wall portion 130 in which the nozzle wall portion 130 is disposed forward of the opposing wall portion 121 of the relay member 120 and in which the ejection hole 4 is formed, and an external fitting cylinder portion 131 that extends rearward from the nozzle wall portion 130 and is externally fitted from the front onto the second relay cylinder portion 123. The inside of the second relay cylinder portion 123 is capable of communicating with the inside of the injection cylinder portion 70 through a communication hole 125. The outer fitting cylinder portion 131 is rotatably attached in a state in which it is prevented from slipping out from the front of the second relay cylinder portion 123. As a result, the nozzle member 3 is combined with the relay member 120 so as to be rotatable around the axis of the guide shaft 124.

[0052] Furthermore, an inner cylinder portion 132 that is rotatably fitted onto the guide shaft 124 protrudes rearward from a portion of the nozzle wall portion 130 that is located inside the outer fitting cylinder portion 131. A second switching groove 133 that extends along the front-rear direction is formed on the inner peripheral surface of the inner cylinder portion 132.

[0053] The first switching groove 126 formed in the guide shaft 124 and the second switching groove 133 formed in the inner cylinder portion 132 are connected at a predetermined rotational position of the nozzle member 3 centered on the axis of the guide shaft 124, and are not connected at other rotational positions. The first switching groove 126 and the second switching groove 133 communicate with each other, so that the ejection hole 4 and the inside of the second relay cylinder portion 123 communicate with each other through the first switching groove 126 and the second switching groove 133. Therefore, the nozzle member 3 can switch, as the guide shaft 124 rotates about its axis, between an ejection permissive state in which ejection of liquid from the ejection hole 4 is permitted, and an ejection restricted state in which ejection is restricted.

[0054] (Stopper member) A stopper member 140 having a stopper 141 for restricting the rearward swing of the trigger portion 81 is attached to the nozzle member 3 configured as described above. The stopper member 140 includes a stopper cylinder 142 attached to the outer fitting cylinder portion 131 of the nozzle member 3, and a lever-shaped stopper 141 formed so as to extend downward from the stopper cylinder 142. The stopper 141 is formed so as to wrap around from the front of the trigger portion 81 in the left-right direction, and a part of it can enter from the left-right direction into the gap between the receiving member 85 and the trigger portion 81. In this way, the stopper 141 restricts the rearward swing of the trigger portion 81.

[0055] By rotating the stopper member 140 together with the nozzle member 3, the stopper 141 can be removed from the gap between the receiving member 85 and the trigger portion 81. This releases the restriction on the rearward swing of the trigger portion 81. Furthermore, when the stopper 141 is removed by rotating the nozzle member 3 and the stopper member 140, the first switching groove 126 and the second switching groove 133 communicate with each other, and the state is switched to an ejection permitted state in which ejection of liquid from the ejection hole 4 is permitted.

[0056] (Occlusion) In the trigger type liquid ejector 1 configured as above, the blocking plug 100 is attached to the opening 21 of the connecting tube portion 20 as described above. The relationship between connecting tubular portion 20 and occlusion plug 100 will now be described in detail.

[0057] 1 and 3 to 5, the connecting tube portion 20 is formed integrally with the lower end portion located on the front end side of the storage cylinder 40. In the illustrated example, the connecting tube portion 20 is formed integrally with the front wall portion 42 constituting the storage cylinder 40, and is formed so as to protrude forward from the front wall portion 42. The inside of the portion of the connecting tube portion 20 protruding forward from the front wall portion 42 is defined as an opening portion 21.

[0058] In this embodiment, the central axis of the opening 21 extending along the front-rear direction is defined as the axis O3. Furthermore, in a plan view seen from the axis O3 direction, a direction intersecting the axis O3 is defined as a radial direction, and a direction going around the axis O3 is defined as a circumferential direction.

[0059] As shown in Figures 3 to 5, the blocking plug 100 comprises a plug body 101 that is fitted inside the connecting tubular portion 20 and blocks the opening 21, and a retaining tube (outer tube according to the present invention) 102 that is integrally formed with the plug body 101 so as to surround the connecting tubular portion 20 from the radial outside and is fitted to the outside of the connecting tubular portion 20, and is arranged coaxially with the axis O3. In this embodiment, the description will be given by taking as an example an occlusion plug 100 in which the plug body 101 and the holding tube 102 are integrally formed. However, the present invention is not limited to the case in which the plug body 101 and the holding tube 102 are integrally formed, and the plug body 101 and the holding tube 102 may be formed separately.

[0060] The plug body 101 includes a blocking wall 103 that blocks the opening 21, and an inner tube 104 that fits tightly inside the connecting tubular portion 20 and is connected to the outer periphery of the blocking wall 103. As a result, the plug body 101 is formed into a bottomed tube that opens toward the front and is closed at the rear. The plug body 101 enters the inside of the opening 21 of the connecting tubular portion 20 from the front, blocking the opening 21.

[0061] Furthermore, plug body 101 has a flange portion 105 that protrudes radially outward from the front end portion of inner tube 104 and contacts from the front side with the front end opening edge of connecting tube portion 20. In the illustrated example, flange portion 105 is formed in an annular shape extending around the entire circumference of the front end portion of inner tube 104.

[0062] The retaining tube 102 is formed to extend continuously around the entire circumference of the connecting tube portion 20 so as to surround from the radial outside the portion of the connecting tube portion 20 that is located forward of the front wall portion 42. The retaining tube 102 fits tightly around the entire circumference of the outside of the portion of the connecting tube portion 20 that is located forward of the front wall portion 42. As a result, the occlusion plug 100 is attached so that the connecting tube portion 20 is sandwiched radially between the inner tube 104 of the plug body 101 and the retaining tube 102. In addition, the retaining tube 102 is formed integrally with the plug body 101, and is formed to extend continuously around the entire circumference of the connecting tube portion 20 so as to surround the connecting tube portion 20 from the radial outside, so that the front end of the retaining tube 102 and the outer peripheral edge portion of the flange portion 105 are connected together around the entire circumference.

[0063] Furthermore, the blocking plug 100 of this embodiment is provided with a locking piece 106 that is formed integrally with the retaining tube 102 and that is locked to the front wall portion 42 . A plurality of locking pieces 106 are formed at intervals in the circumferential direction. In the illustrated example, a pair of locking pieces 106 are formed to face each other in the left-right direction with the axis O3 in between. The pair of locking pieces 106 includes an extension portion 107 extending rearward from the front end portion of the retainer tube 102 along the axis O3 (along the connecting tube portion 20), and a locking protrusion (locking portion according to the present invention) 108 that protrudes radially outward from the rear end portion of the extension portion 107 and locks with a locking hole (locked portion according to the present invention) 43 formed in the front wall portion 42.

[0064] The portion of the extension 107 that is formed from the front end to the rear end of the retainer tube 102 functions as a forward extension 107a. The portion of the extension 107 that extends rearward beyond the rear end of the retainer tube 102 functions as a rearward extension 107b. The extension portion 107 as a whole is formed to have a constant circumferential width in the circumferential direction. The forward extension portion 107a is formed to overlap the outer circumferential surface of the retainer tube 102. The rearward extension portion 107b is inserted from the front into a locking hole 43 formed in the front wall portion 42. As a result, the rear end portion of the rearward extension portion 107b is located rearward of the locking hole 43. The locking hole 43 is formed so as to penetrate the front wall portion 42 in the front-rear direction, and is formed in an arc shape in a plan view extending in the circumferential direction in accordance with the shape of the rearward extending portion 107b.

[0065] Locking projection 108 protrudes radially outward from the rear end of rearward extending portion 107b and locks from behind against the periphery of the opening of locking hole 43. As a result, the entire occlusion plug 100 is locked by locking projection 108, preventing it from coming loose in the forward direction.

[0066] In particular, the locking projection 108 of this embodiment has an outer surface facing outward in the radial direction that is inclined as a slope 108a, the amount of protrusion outward in the radial direction decreasing toward the rear. As a result, the rear extension 107b including the locking projection 108 has a shape that makes it easy to insert into the locking hole 43 from the front side, and also makes it difficult to slip out of the locking hole 43 toward the front. In addition, the front end surface (locking surface) 108b of the locking projection 108 facing forward of the axis O3 is formed into a flat surface that faces the opening periphery of the locking hole 43. This makes it even more difficult for the rear extension portion 107b including the locking projection 108 to slip out forward from within the locking hole 43.

[0067] (Function of trigger-type liquid ejector) Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described. Note that by operating the trigger part 81 shown in Fig. 1 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.

[0068] First, the stopper member 140 is rotated together with the nozzle member 3 to separate the stopper 141 from the gap between the receiving member 85 and the trigger portion 81. This causes the first switching groove 126 and the second switching groove 133 to communicate with each other, and the state is switched to an ejection permitted state in which ejection of liquid from the ejection hole 4 is permitted. Next, 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.

[0069] 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 backward from the most forward position against the biasing force of the biasing member 60, and the liquid can be stored (filled) in the storage space 40a. Then, as the storage plunger 50 moves backward, the liquid in the storage space 40a with increased pressure 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.

[0070] 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.

[0071] 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 moves forward in the main cylinder 82. Therefore, 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 while the storage valve 91 remains 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.

[0072] 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 is stopped, but the storage plunger 50 begins to move forward toward the most forward position due to the biasing force of the 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.

[0073] 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.

[0074] 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 relay member 120 so as to be able to swing, and the main piston 83 is engaged with 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.

[0075] Furthermore, according to the trigger-type liquid ejector 1 of this embodiment, as shown in Figures 1 to 3, the opening 21 of the connecting tube portion 20 that communicates with the interior of the vertical supply tube portion 10 and the interior of the storage cylinder 40 is blocked (sealed) by a blocking plug 100. In particular, the occluding plug 100 is attached so as to radially sandwich the connecting tubular portion 20 by utilizing a plug body 101 fitted inside the connecting tubular portion 20 and a retaining tube 102 fitted around the entire circumference on the outside of the connecting tubular portion 20. Therefore, even if the internal pressure of the connecting tubular portion 20 is high and the plug body 101 is subjected to stress that would cause it to fall out of the opening 21, the clamping between the plug body 101 and the retaining tube 102 can prevent the entire occluding plug 100 from moving forward relative to the connecting tubular portion 20. This makes it possible to prevent unintentional displacement of occlusion plug 100, maintain the proper sealing performance of opening 21, and prevent the occurrence of liquid leakage and the like.

[0076] In addition, when the internal pressure of the connecting tubular portion 20 is high, the internal pressure tends to cause the connecting tubular portion 20 to deform and expand radially outward. In this case, if the occluding plug 100 does not include the retaining tube 102 and only includes the plug body 101, a gap may form between the plug body 101 and the connecting tubular portion 20, which may lead to liquid leakage, etc. However, since the retaining tube 102 of the occlusion plug 100 is formed to extend around the entire circumference of the connecting tube portion 20 so as to surround the connecting tube portion 20 from the outside, and is fitted around the entire circumference of the outside of the connecting tube portion 20, the retaining tube 102 can be used to suppress deformation of the connecting tube portion 20 such that it spreads outward in the radial direction. Therefore, a gap is unlikely to form between the plug body 101 and the connecting tube portion 20, and high sealing performance can be achieved. For these reasons, the trigger-type liquid ejector 1 can be made suitable for continuous ejection. Furthermore, because the plug body 101 is formed into a bottomed cylindrical shape having the inner tube 104, even if the connecting tubular portion 20 is deformed so as to expand radially outward, the inner tube 104 is likely to deform so as to expand radially outward to follow the deformation of the connecting tubular portion 20. This also makes it difficult for a gap to form between the plug body 101 and the connecting tubular portion 20, and a high level of sealing can be achieved.

[0077] Furthermore, in this embodiment, in addition to attaching the occluding plug 100 so as to sandwich the connecting tube portion 20 in the radial direction using the plug body 101 and the retaining tube 102 , the locking piece 106 is locked to the ejector body 2 . Specifically, the locking protrusion 108 formed on the extension portion 107 is locked into the locking hole 43 formed in the ejector body 2. This makes it possible to prevent the occluding plug 100 from coming loose, and effectively suppresses the occluding plug 100 from moving so as to fall out of the opening 21. Therefore, even if the internal pressure of the connecting tube portion 20 becomes high, the sealing performance of the opening 21 can be more appropriately maintained. In particular, because rear extension 107b is formed with locking projection 108, it is possible to lock locking projection 108 into locking hole 43 while appropriately bending rear extension 107b in the radial direction, for example. This makes it possible to easily attach occluding plug 100 to opening 21.

[0078] Furthermore, since the plug body 101 is formed in a bottomed tubular shape having the blocking wall 103 and the inner tube 104, the plug body 101 can be formed to be lightweight, and since, for example, the amount of synthetic resin required to form the plug body 101 can be reduced, it is easy to achieve cost reduction. Furthermore, since the plug body 101 can be attached to the inside of the opening 21 so that the flange portion 105 contacts the front end opening edge of the connecting tube portion 20, it is easy to determine the attachment position of the plug body 101 and to perform the attachment work.

[0079] 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.

[0080] For example, in the above embodiment, a pair of locking pieces 106 that constitute occlusion plug 100 are provided facing each other across axis O3, but the present invention is not limited to this. For example, only one locking piece 106 may be formed, or three or more locking pieces 106 may be formed spaced apart in the circumferential direction.

[0081] Furthermore, in the above embodiment, an example was given of the plug body 101 being formed into a cylindrical shape with a bottom, but this is not limited to this case, and for example, the plug body 101 may be formed into a solid cylindrical shape and fitted into the inside of the opening 21.

[0082] Furthermore, as mentioned above, as long as the retaining tube 102 is formed so as to extend around the entire circumference of the connecting tube portion 20 so as to surround the connecting tube portion 20 from the radial outside, it may be formed integrally with the plug body 101 or may be formed separately. Furthermore, when the retaining tube 102 and the connecting tube portion 20 are integrally formed, for example, window-like cutout holes may be formed between the front end of the retaining tube 102 and the outer circumferential edge of the flange portion 105 so as to be aligned at intervals in the circumferential direction (so as to be arranged intermittently). This can improve the attachment of the occlusion plug 100. [Explanation of symbols]

[0083] A…Container body 1...Trigger-type liquid ejector 2...Ejector body 3…Nozzle member 4…Blowout hole 10…Vertical supply tube 20…Connecting tube 21...Opening of connecting tube 40…Storage cylinder 41…Supply hole 43...Latching hole (locked part) 50…Storage plunger 80...Trigger mechanism 81…Trigger section 100…Occlusion 101...Plug body 102…Retaining tube (outer tube) 103…Closure wall 104…Inner cylinder 105...Flange section 106…Latching piece 107…Stretching section 108...Latching protrusion (locking part)

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 connecting tube portion extending from the vertical supply tube portion and having an opening portion opening to the outside of the ejector 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 through the connecting tube portion toward the nozzle hole side by the rearward movement of the trigger portion; a storage cylinder in which a supply hole communicating with the connecting tube portion is formed, and liquid that has passed through the vertical supply tube portion and the connecting tube portion is supplied to the inside of the storage cylinder through the supply hole as the trigger portion moves rearward; 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 connecting tube portion is provided with a blocking plug attached to block the opening, The occlusion plug is a plug body that is fitted into the connecting tube portion and closes the opening; A trigger-type liquid ejector comprising: an outer tube formed to extend around the entire circumference of the connecting tube portion so as to surround the connecting tube portion from the radial outside, and fitted around the entire circumference of the outside of the connecting tube portion.

2. 2. The trigger type liquid ejector according to claim 1, The blocking plug is formed integrally with the outer cylinder and includes a locking piece that is locked to the ejector body, The locking piece is an extension portion extending along the connecting tube portion toward the vertical supply tube portion beyond the outer tube; A trigger-type liquid ejector comprising: a locking portion formed to protrude radially from the extension portion of the connecting tube portion and which engages with a locking portion formed on the ejector body.

3. 3. The trigger type liquid ejector according to claim 2, The plug body includes: A blocking wall that blocks the opening; an inner tube connected to an outer peripheral edge portion of the blocking wall and fitted inside the connecting tube portion; a flange portion that protrudes from the inner tube toward the outside in the radial direction of the connecting tube portion and that contacts an opening edge of the connecting tube portion.

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