Trigger-type liquid ejector

Abstract

To maintain a proper seal with an occlusive plug.SOLUTION: A trigger type liquid ejection device 1 includes an ejection device body 2 attached to a container body A and a nozzle member 3 in which an ejection hole 4 is formed, the ejection device body includes a supply cylindrical part 10, a connection cylindrical part 20 having an opening 21, a trigger mechanism 80 that circulates a liquid from the inside of the supply cylindrical part through the inside of the connection cylindrical part toward an ejection hole side by moving the trigger part 81 rearward, a storage cylinder 40 into which the liquid that has passed through the supply cylindrical part and the connection cylindrical part is supplied through the supply hole 41 by the rearward movement of the trigger part, and a storage plunger 50 movably disposed within the storage cylindrical device, a blocking plug 100 attached to block the opening is provided in the connection cylindrical part, the blocking plug has a plug body 101 fitted inside the opening, and a lock piece 105 that is arranged radially outside of the connection cylindrical part from the plug body and is locked to the ejection device body.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 within 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 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, and even if the trigger part is not operated, it is possible to eject the liquid by using the storage plunger, which makes it 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 the liquid in the storage plunger is pushed out by moving the storage plunger forward with a biasing member, so that pressure is likely to increase in the storage plunger and the connecting tube. Therefore, high pressure is applied to the blocking plug blocking the opening of the connecting tube, and stress is applied to the blocking plug to dislodge it from the opening. Therefore, there is a possibility that the blocking plug may be unintentionally displaced, which may cause a decrease in sealing performance, leading to inconveniences such as liquid leakage.

[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 that is attached to a container body that contains liquid, and a nozzle member that is attached to the ejector body and has an ejection hole for ejecting liquid, the ejector body having a supply tube portion that sucks up liquid in the container body, a connecting tube portion that extends from the supply tube portion and has an opening that opens to the outside of the ejector body, and a trigger portion that is arranged so as to be movable rearward in a forward biased state, and a trigger mechanism that causes liquid to flow from inside the supply tube portion through the connecting tube portion toward the ejection hole side by the rearward movement of the trigger portion, and a storage cylinder in which a supply hole communicating with the opening is formed, and liquid that has passed through the supply tube portion and the connecting tube portion is supplied to the inside through the supply hole by the rearward movement of the trigger portion; and a storage plunger that is disposed within the storage cylinder so as to be movable in an axial direction along the central axis of the storage cylinder, 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 connecting tube portion is provided with a blocking plug that is attached to block the opening, and the blocking plug comprises a plug body that is fitted inside the opening and a plug body that is connected to the plug body. Ta A locking piece and The locking piece is disposed radially outward of the connecting tube portion and is locked to the ejector body from the rear, thereby restricting forward movement of the blocking plug relative to the connecting tube portion. It is characterized by:

[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 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 supply tube and the connecting tube stops, but the storage plunger starts to move back toward the other 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 supply tube and the storage cylinder, is blocked (sealed) by a blocking plug. In particular, the blocking plug blocks the opening by fitting the plug body to the inside of the opening and locking a locking piece arranged on the radially outer side of the connecting tube with the ejector body. Therefore, even if the internal pressure of the connecting tube is high and the plug body is subjected to stress that causes it to fall out of the opening, the locking piece can restrict the entire blocking plug from moving relative to the connecting tube. This makes it possible to prevent the occlusion plug from unintentionally shifting its position, maintain the appropriate sealing of the opening, and prevent the occurrence of liquid leakage, etc. Therefore, it is possible to provide a trigger-type liquid ejector suitable for continuous ejection.

[0011] (2) The locking piece is formed so as to have an extension extending from a portion connected to the plug body along the connecting tube portion and to protrude from the extension in a radial direction of the connecting tube portion, and to engage with a locking portion formed on the ejector body. From the rear and a locking portion for locking the same.

[0012] In this case, by engaging the locking portion formed on the extension portion with the locked portion formed on the ejector body, it is possible to prevent the occlusion plug from coming loose, etc., and to appropriately suppress the relative movement of the occlusion plug with respect to the connecting tubular portion. In particular, since the locking portion is formed on the extension portion extending along the connecting tubular portion, it is possible to lock the locking portion with the locked portion while appropriately bending the extension portion in the radial direction, for example, and this makes it possible to easily attach the occlusion plug to the opening.

[0013] (3) The plug body may include a blocking wall that blocks the opening, a peripheral wall that fits into the inside of the opening and is connected to the outer peripheral edge of the blocking wall, and a flange portion that protrudes radially outward from the peripheral wall and contacts the opening edge of the connecting tube portion.

[0014] In this case, since the plug body can be formed into a bottomed tubular shape having a closing wall and a peripheral wall, 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 opening so that the flange portion 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

[0015] 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]

[0016] [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 an enlarged cross-sectional view showing the periphery of the occlusion plug shown in FIG. 1. [Diagram 3] 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] 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.

[0018] 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.

[0019] (Ejector body) The ejector body 2 mainly comprises a vertical supply tube portion (the 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.

[0020] 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.

[0021] 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.

[0022] The vertical supply tube portion 10 extends in the vertical direction and has the function of sucking up liquid within 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.

[0023] 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. The blocking plug 100 will be described in detail later.

[0024] 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.

[0025] 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 plug body 101 of the occluding plug 100 described below. 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 inside of the storage cylinder 40 through the supply hole 41.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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. Therefore, the storage plunger 50 can function as a pressure accumulator valve.

[0030] 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.

[0031] The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, and a coil spring 84. 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.

[0032] 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.

[0033] In the illustrated example, a stopper T is detachably 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.

[0034] 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.

[0035] The main piston 83 is biased forward together with the trigger portion 81 by the biasing force of a 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.

[0036] 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 forward via the main piston 83. The coil spring 84 is disposed between the bottom wall of the main piston 83 and the top wall 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] (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.

[0041] (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.

[0042] 1 and 2, 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 formed as an opening portion 21.

[0043] 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.

[0044] As shown in Figures 2 and 3, the occlusion plug 100 comprises a plug body 101 fitted inside the opening 21, and a locking piece 105 connected to the plug body 101 and positioned radially outside the connecting tube portion 20 relative to the plug body 101, and engaged with the front wall portion 42 that constitutes the ejector body 2, and is arranged coaxially with the axis O3.

[0045] The plug body 101 is formed in a bottomed tubular shape having a blocking wall 102 that blocks the opening 21, and a peripheral wall 103 that fits tightly inside the opening 21 and is connected to the outer periphery of the blocking wall 102. As a result, the plug body 101 is formed in a bottomed tubular shape 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 part 20 from the front, closing the opening 21.

[0046] Furthermore, plug body 101 has a flange portion 104 that protrudes radially outward from the front end portion of peripheral wall 103 and contacts from the front side with the front end opening edge of connecting tube portion 20. In the illustrated example, flange portion 104 is formed in an annular shape extending around the entire circumference of the front end portion of peripheral wall 103.

[0047] The locking piece 105 has an extension portion 106 extending rearward along the axis O3 from the outer peripheral edge portion of the flange portion 104 (i.e., the portion connected to the plug body 101), and a locking projection (locking portion according to the present invention) 107 that protrudes radially outward from the rear end portion of the extension portion 106 and locks into a locking hole (locked portion according to the present invention) 43 formed in the front wall portion 42.

[0048] A plurality of locking pieces 105 are formed at intervals in the circumferential direction. In the illustrated example, a pair of locking pieces 105 are formed so as to face each other in the radial direction with the axis O3 in between. The extensions 106 of the pair of locking pieces 105 extend circumferentially and are formed to extend rearward beyond the plug body 101. At this time, the extensions 106 are inserted from the front into the locking holes 43 formed in the front wall portion 42. As a result, the rear ends of the extensions 106 are located rearward beyond the locking holes 43. The locking hole 43 is formed 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 extension portion 106 .

[0049] As described above, locking projection 107 protrudes radially outward from the rear end of extension portion 106 and locks from behind against the periphery of the opening of locking hole 43. As a result, the entire occlusion plug 100 is prevented from coming loose in the forward direction by being locked by locking projection 107, and forward movement relative to connecting tubular portion 20 is restricted. In particular, in the present embodiment, the locking projection 107 has a front end surface 107a facing forward of the axis O3 formed as a flat surface facing the opening periphery of the locking hole 43, and an outer surface facing radially outward is formed as an inclined surface whose radially outward protrusion amount decreases toward the rear. As a result, the extension portion 106 including the locking projection 107 has a shape that makes it easy to insert into the locking hole 43 from the front side, and difficult to slip out of the locking hole 43 toward the front.

[0050] (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. 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.

[0051] After removing the stopper T, 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 up.

[0052] 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 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.

[0053] 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.

[0054] Thereafter, when the trigger portion 81 is released, the main piston 83 moves forward in the main cylinder 82 due to the elastic restoring force (biasing force) of the coil spring 84, and the trigger portion 81 also moves forward in response to this. 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.

[0055] 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.

[0056] 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, through which the liquid can be continuously ejected forward. 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.

[0057] 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 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.

[0058] 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 closes the opening 21 by fitting the plug body 101 inside the opening 21 while engaging the locking piece 105 arranged on the radially outside of the connecting tubular portion 20 with the locking hole 43 formed in the front wall portion 42 that constitutes the ejector body 2. Therefore, even if the internal pressure of the connecting tubular portion 20 is high and the plug body 101 is subjected to stress (forward stress) that would cause it to fall out of the opening 21, the locking by the locking piece 105 can restrict the entire occluding plug 100 from moving forward relative to the connecting tubular portion 20.

[0059] This makes it possible to prevent the occlusion plug 100 from unintentionally shifting its position, maintain the proper sealing of the opening 21, and prevent the occurrence of liquid leakage, etc. Therefore, it is possible to provide a trigger-type liquid ejector 1 suitable for continuous ejection.

[0060] Moreover, in this embodiment, locking projection 107 formed on the rear end of extension portion 106 locks from behind against the periphery of the opening of locking hole 43 formed in front wall portion 42, preventing occlusion plug 100 from slipping out forward. Therefore, unexpected forward movement of occlusion plug 100 relative to connecting tubular portion 20 can be appropriately prevented. In particular, since a locking protrusion 107 is formed on the extension portion 106 extending along the axial direction of the connecting tube portion 20, it is possible to lock the locking protrusion 107 by appropriately bending the extension portion 106 in the radial direction, for example, thereby making it possible to easily attach the occlusion plug 100 to the opening 21.

[0061] Furthermore, since the plug body 101 is formed in a bottomed tubular shape having the blocking wall 102 and the peripheral wall 103, 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 104 contacts the front end opening edge of the connecting tubular portion 20, it is easy to determine the attachment position of the plug body 101 and to perform the attachment work.

[0062] 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.

[0063] For example, in the above embodiment, the locking piece 105 constituting the occlusion plug 100 is provided as a pair facing each other across the axis O3, but the present invention is not limited to this. For example, only one locking piece 105 may be formed, or three or more may be formed at intervals in the circumferential direction. Furthermore, when only one locking piece 105 is formed, the locking piece 105 may be configured in a cylindrical shape that surrounds the connecting tube portion 20 from the outside in the radial direction.

[0064] Furthermore, as an example of the case where the locking piece 105 is locked to the ejector main body 2, the locking hole 43 formed in the front wall portion 42 is locked to the locking protrusion 107 formed in the extension portion 106, but the present invention is not limited to this case. For example, the locking piece 105 may be locked to the outer circumferential surface of the connecting tube portion 20 by screwing or the like. In any case, as long as the locking piece 105, which is provided separately from the plug body 101 and is placed inside the opening 21 of the connecting tube portion 20, can be locked to the ejector body 2, various locking means can be adopted.

[0065] 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. [Explanation of symbols]

[0066] A…Container body 1...Trigger-type liquid ejector 2...Ejector body 3…Nozzle member 4…Blowout hole 10...Vertical supply tube section (supply tube section) 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…Closure wall 103...peripheral wall 104…Flange section 105…Latching piece 106…Stretching section 107...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 supply tube portion that sucks up the liquid in the container body; a connecting tube portion extending from the 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 supply tube portion through the connection 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 inside of the connecting tube portion is formed, and in which liquid that has passed through the supply tube portion and the connecting tube portion is supplied to an 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 fitted inside the opening; A locking piece connected to the plug body, A trigger-type liquid sprayer characterized in that the locking piece is positioned radially outward of the connecting tube portion and is locked to the sprayer body from the rear, thereby regulating the forward movement of the blocking plug relative to the connecting tube portion.

2. 2. The trigger type liquid ejector according to claim 1, The locking piece is an extension portion extending from a portion connected to the plug body along the connecting tube portion; A trigger-type liquid ejector comprising: a locking portion formed to protrude radially from the extension portion of the connecting tube portion and locking from behind against a locking portion formed on the ejector main body.

3. 3. The trigger type liquid ejector according to claim 2, The plug body includes: A blocking wall that blocks the opening; a peripheral wall that fits into the opening and is connected to an outer peripheral edge of the closing wall; a flange portion that protrudes from the peripheral wall toward an outer side in a radial direction of the connecting cylinder portion and that contacts an opening edge of the connecting cylinder portion.

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