Trigger-type liquid dispenser

Abstract

To prevent a trigger part from being detached from a main piston even when an unexpected forward external force is applied to the trigger part.SOLUTION: A pair of side covers 86 protruding forward from the main cylinder and covering the biasing member and the trigger 81 from both sides in the left-right direction, the pair of side covers being formed with locking recesses 87 opening inward in the left-right direction, the trigger having locking projections 170 protruding outward in the left-right direction and being disposed inside the pair of side covers with the locking projections inserted into the locking recesses, the locking projections being movable along the locking recesses as the trigger swings; The trigger part is arranged so as to face the front edge part 87a of the locking recessed part so as to be locked from the back when the trigger part is positioned at the foremost rocking position.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Trigger-type liquid ejectors are known in which a sliding portion of a main piston slides rearward along the inner circumferential surface of a main cylinder as a trigger swings rearward, thereby ejecting liquid from an ejection hole. For example, in the trigger-type liquid ejector shown in Patent Document 1 below, a connecting protrusion (boss) formed on the trigger portion is inserted into a connecting hole formed in the front end of the main piston, thereby connecting the front end of the main piston to the trigger portion. Furthermore, a portion of the main piston located between the sliding portion and the trigger portion is inserted inside a cylindrical biasing member that biases the trigger portion forward. Therefore, the biasing member is provided outside the main cylinder and is not in contact with the liquid. As a result, deterioration of the biasing member due to contact with the liquid is suppressed.

[0003] The trigger-type liquid ejector disclosed in Patent Document 1 includes a storage cylinder and storage plunger that enable continuous ejection of liquid in addition to a main cylinder and main piston. Therefore, the biasing member is required to have a high spring constant, which tends to limit the material that can be used. Therefore, if the biasing member comes into contact with the liquid, there is a risk that the limited material may be altered. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-98189 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional trigger-type liquid sprayer, when an unexpected external force is applied forward to the trigger portion during product distribution, product display, etc., there is a risk that the connecting protrusion will come out of the connecting hole and the trigger portion will come off the front end of the main piston. If the trigger comes off the front end of the main piston, the trigger will try to return to its original position when the sudden forward external force is released, but in the process, the connecting protrusion that has come off the connecting hole will push the main piston from the front, which could cause the main piston to become stuck in a position further back than its original standby position (forward-most position).

[0006] Furthermore, if the trigger is operated while it is disengaged from the front end of the main piston, causing it to move rearward together with the main piston, the trigger will then be restored forward by the biasing member, but the main piston will not move forward and will remain in that position, which could result in the main piston remaining in a position further rearward than its forward-most position, as described above.

[0007] In this type of trigger-type liquid ejector, an inlet for an outside air introduction passage is opened on the inner circumferential surface of the main cylinder. The outside air introduction passage serves to introduce outside air into the container body as the liquid in the container body is supplied into the main cylinder. When the main piston is located at its forwardmost position, it closes the inlet for the outside air introduction passage. Therefore, if the main piston moves further rearward than the forward-most position as described above and remains in that position, the inlet port cannot be closed, which can lead to problems such as the liquid in the container leaking out of the inlet port through the outside air intake passage.

[0008] The present invention has been made in consideration of these circumstances, and its purpose is to provide a trigger-type liquid ejector that can prevent the trigger portion from coming off the main piston even if an unexpected external force is applied to the trigger portion in the forward direction. [Means for solving the problem]

[0009] (1) A trigger-type liquid ejector according to the present invention comprises an ejector body attached to a container body containing a liquid, and a nozzle member attached to the ejector body and having an ejection hole formed therein for ejecting the liquid, wherein the ejector body has a vertical supply tube portion that sucks up the liquid in the container body, and a trigger portion disposed in front of the vertical supply tube portion so as to be swingable rearward about a rotation axis in a forward biased state, and a trigger mechanism that causes the liquid to flow from inside the vertical supply tube portion toward the ejection hole side by swinging the trigger portion rearward from the most forward swing position, and a nozzle member extending in the front-rear direction and configured to be attached to the nozzle member. a storage cylinder into which the liquid that has passed through the vertical supply cylindrical portion is supplied by the rearward swing of the storage cylinder; and a storage plunger that is movably disposed within the storage cylinder and moves rearward and is urged forward as the liquid is supplied into the storage cylinder, and the trigger mechanism has a main cylinder formed in a cylindrical shape with a bottom that opens forward and communicates with the interior of the vertical supply cylindrical portion, a piston body that is in sliding contact with the inner surface of the main cylinder so as to be movable back and forth, and a connecting portion that extends forward from the piston body and is connected to the trigger portion. a main piston that moves rearward from a frontmost position as the trigger portion swings rearward to pressurize the inside of the main cylinder; a biasing member that biases the trigger portion forward; a receiving member that supports the biasing member from the rear; and a pair of side covers that protrude forward beyond the main cylinder and cover the biasing member and the trigger portion from both left and right sides, the ejector body having an inlet that opens to an inner peripheral surface of the main cylinder and an outside air introduction passage that introduces outside air into the container body through the inlet, the biasing member and the receiving member a locking projection formed on the trigger portion and extending in the front-rear direction with the main piston inserted inside, the piston body closing the introduction port when the main piston is positioned at the front-most position, the pair of side covers each having a locking recess formed therein that extends in the front-rear direction and opens inward in the left-right direction, the trigger portion having a locking projection that protrudes outward in the left-right direction, the trigger portion being positioned inside the pair of side covers in the left-right direction with the locking projection inserted into the locking recess, the locking projection having aThe trigger portion is movable along the locking recess as the trigger portion swings, and is disposed so as to face the front edge of the locking recess from behind and be lockable when the trigger portion is positioned at the forward-most swing position.

[0010] According to the trigger-type liquid ejector of the present invention, by operating the trigger against the biasing force of the biasing member to swing the trigger rearward from the forward-most swing position, the main piston can be moved rearward from the forward-most position. This allows the main piston to pressurize the main cylinder and supply liquid from the main cylinder into the vertical supply tube. This allows the liquid to flow from the vertical supply tube toward the ejection hole, and the liquid can be ejected from the ejection hole to the outside. After the liquid is ejected, when the trigger is released, the biasing force (elastic restoring force) of the biasing member causes the trigger to swing forward and return to its original position. The forward swing of the trigger also causes the main piston to return to its original position, allowing the main piston to be used to reduce the pressure inside the main cylinder. This allows the liquid inside the container to be sucked up into the vertical supply tube and introduced into the main cylinder, preparing for the next ejection.

[0011] In particular, because the trigger is connected to the main piston via the connecting part, when the trigger is swung backward, the stress (operating force) acting on the trigger can be directly transmitted to the main piston. This allows the main piston to be pushed into the main cylinder in conjunction with the swinging of the trigger, thereby appropriately pressurizing the main cylinder. Similarly, when the trigger is swung forward by the biasing force of the biasing member, the forward biasing force acting on the trigger can be directly transmitted to the main piston via the connecting part. This allows the main piston to return to its original position forward as the trigger swings forward, thereby reducing the pressure inside the main cylinder.

[0012] Furthermore, by operating the trigger and swinging it backward, liquid can be supplied from the vertical supply tube into the storage cylinder, thereby pressurizing the liquid inside the storage plunger. When the liquid pressure reaches a predetermined value, the storage plunger moves backward against the biasing force. Therefore, each time the trigger is pulled, the storage plunger moves backward, allowing the liquid to be sprayed while storing (filling) the liquid inside the storage cylinder. In particular, the biasing member is located between the receiving member and the trigger, and is therefore located outside the main cylinder where it does not come into contact with the liquid. This allows for free selection of materials regardless of the liquid, and allows for the biasing member to have a high spring constant suitable for continuous spraying.

[0013] After filling the storage cylinder with liquid, if the trigger operation is stopped, the supply of liquid into the storage cylinder through the vertical supply tube stops, but the storage plunger begins to return to its original position forward. This allows the liquid filled in the storage cylinder to be pushed out from the storage cylinder toward the nozzle hole, causing it to be sprayed from the nozzle hole. This makes it possible to continuously spray liquid.

[0014] The trigger is disposed inside the pair of side covers and has a locking protrusion that is inserted into a locking recess formed in the side covers. The locking protrusion is movable along the locking recess as the trigger swings. Therefore, the trigger is guided from the outside in the left-right direction by the pair of side covers, and swings while the locking protrusion is guided within the locking recess. This allows the trigger to swing stably and smoothly while suppressing rattle and other issues.

[0015] In particular, the locking protrusion is positioned to face the front edge of the locking recess from behind so as to be able to lock onto the trigger when the trigger is in the forward-most swing position (when the main piston is in the forward-most position). Therefore, even if an unexpected external force acts on the trigger in the forward direction, for example, during product distribution or product display, the locking protrusion can be locked onto the front edge of the locking recess from behind, preventing the trigger from moving further forward from the forward-most swing position. Therefore, the connection between the trigger and the connecting portion of the main piston can be maintained, preventing the trigger from coming off the main piston. Therefore, when not in use, the main piston can be kept in the forwardmost position appropriately, the main piston can be operated with an appropriate stroke amount, and the seal between the main piston and the main cylinder can be maintained to prevent liquid leakage, etc. Therefore, a trigger-type liquid ejector with improved operability and quality can be obtained.

[0016] Furthermore, even if an unexpected external force acts on the trigger in the forward direction, the trigger is prevented from coming off the main piston, allowing the main piston to remain in the forwardmost position. Therefore, the piston body can maintain a stable and appropriate blocking state of the inlet port of the outside air introduction passage. This prevents liquid leakage from the container through the inlet port.

[0017] (2) The locking recess may be formed to penetrate the side cover in the left-right direction, and the locking protrusion may be inserted into the locking recess in a state where it penetrates the side cover in the left-right direction.

[0018] In this case, the locking protrusion can be fully inserted into the locking recess. This makes it less likely that the locking protrusion will accidentally come out of the locking recess, and in the event that an unexpected forward external force is applied to the trigger, the locking protrusion can be more fully locked from the rear with the front edge of the locking recess. This effectively prevents the trigger from moving further forward from its forwardmost swing position, further preventing the trigger from coming off the main piston.

[0019] (3) The outer surface of the side cover facing outward in the left-right direction may be formed so as to extend continuously along the opening edge of the locking recess and may be formed with a flange portion that protrudes outward in the left-right direction.

[0020] In this case, the flange is formed continuously along the edge of the locking recess, allowing the area around the opening of the locking recess to be thickened accordingly. This increases the rigidity of the side cover itself, making it less likely for the side cover to deform outward in the left-right direction. This further prevents the locking protrusion from coming out of the locking recess.

[0021] (4) The locking protrusion may be formed in a cylindrical shape, and at least the front edge portion of the locking recess may be formed in a curved shape that bulges forward in accordance with the outer shape of the locking protrusion, allowing the locking protrusion to make surface contact.

[0022] In this case, if an unexpected external force acts on the trigger in the forward direction, the locking protrusion can be locked from the rear with surface contact with the front edge of the locking recess. This allows the locking protrusion to be more firmly locked to the front edge of the locking recess, making it possible to more effectively prevent the trigger from coming off the main piston.

[0023] (5) The locking projection may be formed with a set surface that is inclined so as to extend forward from the inside to the outside in the left-right direction and faces rearward.

[0024] In this case, when assembling the trigger-type liquid ejector, the trigger portion can be set inside the pair of side covers in the left-right direction by sliding it on the setting surface by bringing the setting surface into contact with the front end of the side cover from the front and pushing the trigger portion from the front. In this way, the setting surface can be used as a guide surface to smoothly guide the trigger portion inside the pair of side covers, allowing for efficient assembly and improving manufacturing efficiency. [Effects of the Invention]

[0025] According to the present invention, even if an unexpected external force is applied to the trigger portion in the forward direction, the trigger portion can be prevented from coming off the main piston. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a vertical cross-sectional view showing an embodiment of a trigger-type liquid ejector according to the present invention. [Figure 2] FIG. 2 is an enlarged longitudinal cross-sectional view of the main piston and its periphery shown in FIG. 1. [Figure 3] FIG. 2 is a front view of the trigger-type liquid ejector shown in FIG. 1. [Figure 4] FIG. 2 is a side view of the trigger-type liquid ejector shown in FIG. 1 as viewed from the left and right direction. [Figure 5] FIG. 5 is an enlarged perspective view of the periphery of the side cover shown in FIG. 4. [Figure 6] 5 is a side view showing a state in which the trigger portion shown in FIG. 4 is swung rearward. FIG. [Figure 7] 6 is a perspective view showing a state before the trigger portion shown in FIG. 5 is set inside the side cover. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a trigger-type liquid ejector according to the present invention will be described below 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.

[0028] As shown in Figure 1, the trigger-type liquid sprayer 1 of this embodiment comprises a sprayer body 2 that is attached to a container body A that contains liquid, a nozzle member 3 that is attached to the sprayer body 2 and has an ejection hole 4 formed therein for ejecting the liquid, a stopper member 5 that is combined with the nozzle member 3 and is rotatable relative to the sprayer body 2, and a cover body 6 that covers the sprayer body 2. Unless otherwise specified, each component part of the trigger-type liquid ejector 1 is a molded product made of synthetic resin.

[0029] (Ejector body) The ejector body 2 mainly comprises a vertical supply tube portion 10, a connecting tube portion 20, an attachment cap 30, a storage cylinder 40, a storage plunger 50, a biasing member 60, an injection tube portion 70, a trigger mechanism 80, a ball valve 90, a storage valve 91, and an outside air introduction passage 92.

[0030] 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.

[0031] 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-to-rear direction.

[0032] The vertical supply tube portion 10 extends in the vertical direction and has the function of sucking up the liquid inside the container body A. The vertical supply tube portion 10 is formed in a double-cylinder shape having an outer tube and an inner tube, and is attached to the container body A by an attachment cap 30. The upper part of a pipe 11 that extends in the vertical direction and sucks up the liquid from the container body A is fitted into the vertical supply tube portion 10.

[0033] At the upper end of the vertical supply tube 10, a connecting tube 20 is provided which extends forward. The connecting tube part 20 is formed in a cylindrical shape with an opening that opens to the front of the ejector body 2, and is connected to the inside of the vertical supply tube part 10. A blocking plug 100 is attached to the opening of the connecting tube part 20 from the front to block the opening.

[0034] A cylinder tube portion 110 is provided below the connecting 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 second space S2 is provided between the cylinder tube portion 110 and 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 cylindrical shape with a bottom that is open at the front and closed at the rear.

[0035] The central axis that passes through the center of the main cylinder 82 and extends in the front-to-rear direction is defined as axis O3. Furthermore, the direction that intersects with axis O3 as viewed from the front-to-rear direction is defined as the cylinder radial direction, and the direction that rotates around axis O3 as viewed from the front-to-rear direction is defined as the cylinder circumferential direction.

[0036] 1 and 2, a piston guide 82a protruding forward from the center of the rear wall of the main cylinder 82 and a communication hole 82b penetrating the rear wall in the front-to-rear direction are formed in the rear wall. The piston guide 82a is disposed coaxially with the axis O3. In the illustrated example, the piston guide 82a is formed in a cylindrical shape, but this is not limited to this and may be formed in a solid cylindrical shape, for example. The communication hole 82b is formed in a portion of the rear wall portion that is located above the piston guide 82a, so that the inside of the main cylinder 82 communicates with the inside of the vertical supply tube portion 10 through the communication hole 82b.

[0037] Furthermore, an inlet 82c is formed in the main cylinder 82, penetrating the main cylinder 82 in the cylinder diameter direction. The inlet 82c opens to the inner peripheral surface of the main cylinder 82, and communicates with a first space S1 defined between the outer peripheral surface of the main cylinder 82 and the inner peripheral surface of the cylinder tubular portion 110. The first space S1 extends continuously over the entire circumferential length of the cylinder. A first communication hole 110a communicating the first space S1 with the second space S2 is formed in the cylinder-mounted cylindrical portion 110. Furthermore, a second communication hole 10a communicating the second space S2 with the inside of the container body A is formed in the wall surface of the vertical supply cylindrical portion 10 that defines the second space S2.

[0038] The above-mentioned inlet port 82c, first space S1, first communication hole 110a, second space S2, and second communication hole 10a constitute an outside air introduction passage 92 that introduces outside air into container body A as the liquid in container body A is supplied into main cylinder 82. Note that inlet port 82c is closed by sliding portion 141 of piston body 140 of main piston 83 located at the foremost position.

[0039] 1, 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-to-rear direction and is disposed so as to straddle the vertical supply tube portion 10 in the front-to-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 of the storage cylinder 40 is formed integrally with the upper end of the vertical supply tube portion 10 and the upper end of the connecting tube portion 20.

[0040] 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 (storage space 40a) by the rearward swing of the trigger portion 81. Specifically, a supply hole 41 that communicates with the inside of the connecting cylindrical portion 20 is formed in the lower portion of the front end of the storage cylinder 40. The supply hole 41 opens to a portion located rearward of the occlusion plug 100. This makes it possible to supply liquid that has passed through the vertical supply cylindrical portion 10 and the connecting cylindrical portion 20 into the storage cylinder 40 through the supply hole 41.

[0041] The storage plunger 50 is disposed within the storage cylinder 40 so as to be movable in the front-rear direction along the axis O2. This allows the storage plunger 50 to slide tightly within 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 cylinder 10 and the ejection holes 4 through the interior of the connecting cylinder 20, and allows communication between the interior of the vertical supply cylinder 10 and the ejection holes 4 through the interior of the connecting cylinder 20 when it moves rearward.

[0042] Therefore, when the storage plunger 50 is in the forward most position, it blocks communication between the interior of the vertical supply cylinder 10 and the interior of the injection cylinder 70 through the interior of the connecting cylinder 20, and when it moves rearward from the forward most position, it allows communication with the ejection hole 4 through the interior of the injection cylinder 70. Note that in the storage cylinder 40, the space located forward of the storage plunger 50 functions as a storage space 40a.

[0043] The storage space 40a stores the liquid that passes through the vertical supply tube portion 10 and the connecting tube portion 20 and that has passed 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.

[0044] 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. In the initial state before the trigger portion 81 is operated, the biasing member 60 biases the storage plunger 50 forward. As a result, the storage plunger 50 is located at the forward-most 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.

[0045] In the storage cylinder 40 and 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. Thereafter, 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.

[0046] The injection tube portion 70 extends forward from the storage cylinder 40. The injection tube portion 70 is in communication with the interior of the vertical supply tube portion 10 through the storage cylinder 40 and the connecting tube portion 20. This allows the injection tube portion 70 to guide the liquid that has passed through the vertical supply tube portion 10, the connecting tube portion 20, and the storage cylinder 40 to the ejection hole 4.

[0047] The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, a coil spring (a biasing member according to the present invention) 84, and a receiving member 85 that supports the coil spring 84 from the rear. The trigger mechanism 80 is capable of circulating liquid from inside the vertical supply tube portion 10 through the connecting tube portion 20 toward the ejection holes 4 side by swinging the trigger portion 81 rearward.

[0048] 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 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 about a rotation axis M, and the lower end portion is disposed in front of the main cylinder 82. The trigger portion 81 will be described in detail later.

[0049] 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 swing 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 cylindrical shape with a top that is open at the rear and closed at the front. The main piston 83 will be described in detail later.

[0050] As shown in Figures 1 and 2, the receiving member 85 comprises a receiving tube 85a fitted from the front inside the main cylinder 82, an annular flange portion 85b protruding from the front end of the receiving tube 85a toward the radially outer side of the main cylinder 82, and a connecting piece 85c extending rearward from the flange portion 85b and inserted from the front between the connecting tube portion 20 and the main cylinder 82. The entire receiving member 85 is integrally combined with the main cylinder 82. The main piston 83 is positioned at the frontmost position by a receiving cylinder 85a.

[0051] 3 to 6, the receiving member 85 further has a pair of side covers 86 that protrude forward from the flange portion 85b and face each other with a gap in the left-right direction. Note that the stopper member 5 is not shown in FIG. The pair of side covers 86 are arranged to face each other in the left-right direction, sandwiching the main piston 83 and the trigger portion 81 therebetween. The pair of side covers 86 have a constant thickness when viewed from the front, and are formed like plates that are longer in the front-to-rear direction than in the up-and-down direction when viewed from the left-to-right direction. The front ends of the pair of side covers 86 are formed to bulge in an arc shape toward the front. Furthermore, the pair of side covers 86 extend forward from the flange portion 85b so that their front ends are located outside in the left-to-right direction of the trigger portion 81, which is positioned in the forward-most swing position. As a result, the pair of side covers 86 protrude forward beyond the main cylinder 82 and cover the coil spring 84 and the trigger portion 81 from both the left and right sides.

[0052] Furthermore, each of the pair of side covers 86 is formed with a locking hole (locking recess according to the present invention) 87 that extends in the front-rear direction and penetrates the side cover 86 in the left-right direction. The locking hole 87 is formed in the vertical center of the side cover 86 and extends over substantially the entire length of the side cover 86. The locking hole 87 is formed to extend in the front-rear direction with a constant opening width W (see FIG. 4) in a side view seen from the left and right. A front edge 87a of the locking hole 87 is formed in a semicircular curved surface that bulges forward in accordance with the outer shape of a cylindrical locking protrusion 170, which will be described later. Similarly, a rear edge 87b of the locking hole 87 is formed in a semicircular curved surface that bulges rearward.

[0053] Furthermore, on the outer surfaces of the pair of side covers 86 facing outward in the left-right direction, a flange portion 88 is formed so as to extend continuously along the opening edge of the engagement hole 87 and protrude outward in the left-right direction.

[0054] 1 and 2, the coil spring 84 is made of, for example, metal and is formed to extend in the front-to-rear direction. The coil spring 84 is arranged to surround the main piston 83 from the outside in the cylinder radial direction. The coil spring 84 is arranged in a compressed state so that its rear end contacts the receiving cylinder 85a and its front end contacts the trigger portion 81. As a result, the coil spring 84 is disposed between the receiving member 85 and the trigger portion 81, and biases the trigger portion 81 forward. Furthermore, since the coil spring 84 is disposed inside the pair of side covers 86, it is difficult to see from the outside and is therefore concealed.

[0055] As shown in FIG. 1, 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 inside of the vertical supply tube section 10 when the inside of the main cylinder 82 is pressurized, and displaces upward when the inside of the main cylinder 82 is depressurized, thereby allowing communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tube section 10.

[0056] A storage valve 91 is disposed above the ball valve 90. The storage valve 91 is a check valve that allows the supply of liquid from the vertical supply tube portion 10 through the connecting tube portion 20 into the storage cylinder 40, and also restricts the outflow of liquid from the storage cylinder 40 through the connecting tube portion 20 into the vertical supply tube portion 10.

[0057] The cover body 6 is formed 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.

[0058] (Relay component) A relay member 120 that connects between the injection tube portion 70 and the nozzle member 3 is attached to the injection tube portion 70. Relay member 120 is attached to injection tube portion 70 from the front. Relay member 120 is located forward of injection tube portion 70 and includes a wall portion 121 arranged opposite injection tube portion 70, a first relay tube portion 122 extending rearward from wall portion 121 and fitted onto injection tube portion 70, a second relay tube portion 123 extending forward from wall portion 121, and a guide shaft 124 located inside second relay tube portion 123 and extending forward from wall portion 121. The interior of second relay tube portion 123 communicates with the interior of injection tube portion 70 through a communication hole formed in wall portion 121 .

[0059] (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 arranged forward of the wall portion 121 of the relay member 120 and comprises a nozzle wall portion 130 in which an ejection hole 4 is formed, and an outer fitting cylindrical portion 131 which extends rearward from the nozzle wall portion 130 and is fitted from the front onto the second relay cylindrical portion 123. An inner cylindrical portion 132 that fits onto the outside of the guide shaft 124 protrudes rearward from the nozzle wall portion 130. This makes it possible to guide the liquid to the ejection holes 4 through the gap between the guide shaft 124 and the inner cylindrical portion 132.

[0060] The nozzle member 3 is combined with a stopper member 5 that restricts the rearward swing of the trigger portion 81. The stopper member 5 is rotatably attached to the outer fitting cylindrical portion 131 of the nozzle member 3, and has a stopper piece 5a that is disposed between the trigger portion 81 and the receiving member 85. As the stopper member 5 rotates, the stopper piece 5a is able to move between a restricting position where it comes into contact with or close to the trigger portion 81 from behind to restrict the rearward movement of the trigger portion 81, and an allowing position where it is separated from the trigger portion 81 to allow the rearward movement of the trigger portion 81. However, the stopper member 5 is not essential and may not be provided.

[0061] (Main piston, trigger part) In the trigger type liquid ejector 1 configured as described above, the main piston 83 and the trigger portion 81 will be described in more detail, and the relationship between them will be described.

[0062] (main piston) 2, the main piston 83 is disposed coaxially with the axis O3 inside the main cylinder 82. The main piston 83 includes a piston body 140 formed in a cylindrical shape with an open rear end and a closed front end, and a connecting part 150 extending forward from the front end of the piston body 140.

[0063] The piston body 140 is supported by the piston guide 82a so as to be movable back and forth. A sliding portion (lip portion) 141 that protrudes outward in the cylinder radial direction is formed at the rear end of the piston body 140, which is located rearward of the receiving cylinder 85a. The sliding portion 141 is formed in an annular shape extending along the cylinder circumferential direction, and is in close sliding contact with the inner circumferential surface of the main cylinder 82. As a result, the piston body 140 is in sliding contact with the inner circumferential surface of the main cylinder 82 via the sliding portion 141 so as to be movable back and forth.

[0064] The main piston 83, except for its rear end, protrudes forward through the inside of the receiving tube 85a. When the main piston 83 is at its frontmost position as shown in Figure 2, the front end of the main piston 83 is located forward of the receiving member 85, and when the main piston 83 is pressed all the way into the main cylinder 82, it is located inside the receiving tube 85a. As a result, the front end of the main piston 83 is always located inside the coil spring 84. When the main piston 83 is located at the frontmost position, the sliding portion 141 formed at the rear end of the main piston 83 closes the inlet port 82c of the outside air introduction passage.

[0065] The connecting portion 150 is formed in the shape of a vertically long plate extending forward from the front end of the piston body 140. A connecting hole 151 is formed in the connecting portion 150, penetrating the connecting portion 150 in the left-right direction. The connecting hole 151 is formed in an elliptical shape that is longer in the up-down direction than in the front-to-back direction, for example, in a side view seen from the left-to-right direction. A connecting shaft 169, which will be described later and which is formed in the trigger portion 81, is inserted into the connecting hole 151.

[0066] (Trigger section) 1 to 4, trigger portion 81 is a portion that is gripped when performing a spraying operation, and can be hooked from the front with, for example, an index finger, etc. Trigger portion 81 is disposed in front of main piston 83, and extends so as to incline forward as it goes from top to bottom. The trigger portion 81 mainly includes a front plate portion 160 and a pair of side plate portions 161 extending rearward from the side edges of the front plate portion 160. As a result, the inside of the trigger portion 81 is open rearward.

[0067] The front plate 160 is disposed in front of the main piston 83 and includes a first front plate 163 that is inclined forward from top to bottom, and a second front plate 164 that is recessed rearward from the lower end of the first front plate 163 and then extends while gently curving forward as it extends downward. This allows the rearward recess formed in the second front plate 164 to be used to hook a fingertip or the like.

[0068] 2 and 3, a through-hole 165 is formed in the first front plate portion 163, penetrating the first front plate portion 163 in the front-rear direction. The through-hole 165 is located in the center of the first front plate portion 163 in the left-right direction, and is formed in, for example, a rectangular shape when viewed from the front.

[0069] 2, the first front plate portion 163 is formed with at least an internal upper wall 167 and an internal lower wall 168, each extending rearward. The internal upper wall 167 and the internal lower wall 168 are arranged to face each other in the up-down direction. The internal space surrounded by the pair of side plate portions 161, the internal upper wall 167, and the internal lower wall 168 opens forward through the through-hole 165 and functions as a storage space R that also opens rearward.

[0070] A connecting shaft 169 extending inward in the left-right direction is formed on each of the pair of side plate portions 161. The connecting shaft 169 is formed in a cylindrical shape and is disposed within the accommodation space R. The main piston 83 is disposed so that the connecting portion 150 enters the accommodation space R from the rear when the main piston 83 is located at the front-most position. The connecting shafts 169 are inserted into connecting holes 151 formed in the connecting portions 150 from the outside in the left-right direction.

[0071] As a result, the main piston 83 is connected to the trigger part 81 via the connecting shaft 169. Therefore, as the trigger part 81 swings rearward, the main piston 83 moves rearward and is pushed into the main cylinder 82. Therefore, the inside of the main cylinder 82 is pressurized and depressurized as the main piston 83 moves forward and backward. When the trigger part 81 is in the forward-most swing position, the main piston 83 is located at the corresponding forward-most position.

[0072] 2, the coil spring 84 is disposed so as to surround the main piston 83 from the outside in the cylinder radial direction and to contact the rear end edges of at least one pair of side plate portions 161 from behind. As a result, the trigger portion 81 is biased forward by the biasing force (elastic restoring force) of the coil spring 84.

[0073] 4 to 6, a locking protrusion 170 that protrudes outward in the left-right direction is formed on each of the pair of side plate portions 161 of the trigger portion 81. The locking protrusion 170 is formed in a cylindrical shape and is inserted into a locking hole 87 formed in the side cover 86 from the inside in the left-right direction. As a result, the trigger portion 81 is disposed inside the pair of side covers 86 in the left-right direction with the locking projections 170 inserted into the locking holes 87 .

[0074] The locking protrusion 170 is inserted into the locking hole 87 while penetrating the side cover 86 in the left-right direction, and is movable along the locking hole 87 as the trigger portion 81 swings. Furthermore, the locking protrusion 170 is disposed so as to face the front edge portion 87a of the locking hole 87 from behind and be able to be locked when the trigger portion 81 is in the forward-most swing position. When the trigger portion 81 is positioned in the forwardmost swing position, the locking protrusion 170 may be in contact with the front edge portion 87a of the locking hole 87 from behind, or may be in close proximity with a small gap.

[0075] Furthermore, the locking protrusion 170 is formed in a cylindrical shape, and is therefore capable of being locked in a state of surface contact with the front edge 87a and the rear edge 87b of the locking hole 87. Furthermore, the locking protrusion 170 is formed in a cylindrical shape with a diameter smaller than the opening width W (see FIG. 4) of the locking hole 87. Therefore, a gap (play) is secured between the locking protrusion 170 and the locking hole 87 to allow movement of the locking protrusion 170 about the rotation axis M. Therefore, as indicated by arrow N in FIG. 6, the locking protrusion 170 is capable of moving in the front-to-rear direction within the locking hole 87, drawing an arc about the rotation axis M as the trigger portion 81 swings.

[0076] 5, the locking projection 170 is formed with a set surface 171 that is inclined so as to extend forward from the inside to the outside in the left-right direction and faces rearward. This makes it possible to easily set the trigger part 81 inside the pair of side covers 86 by using the set surface 171 when assembling the trigger-type liquid ejector 1, etc.

[0077] (The action of the trigger-type liquid jet) Next, we will explain how to use the trigger-type liquid sprayer 1 configured as described above. It is assumed that each part of the trigger-type liquid sprayer 1 is filled with liquid and that the liquid can be sucked up into the vertical supply tube part 10.

[0078] 1, in the trigger-type liquid sprayer 1 of this embodiment, when the product is being distributed, displayed, etc., the stopper piece 5a is disposed at a restricting position between the trigger part 81 and the receiving member 85, thereby restricting the backward movement of the trigger part 81. Therefore, unintentional backward movement of the trigger part 81 can be prevented, and the spraying or leakage of liquid can be suppressed. In the initial stage, the main piston 83 is located at the frontmost position, and the sliding portion 141 of the piston body 140 closes the inlet port 82c of the outside air introduction passage 92.

[0079] Next, when using the trigger-type liquid ejector 1, the stopper member 5 is rotated to move the stopper piece 5a from the restricting position to the allowing position separated from the trigger part 81. This allows the trigger part 81 to move backward. Next, the trigger 81 is pulled rearward against the biasing force of the coil spring 84, causing the trigger 81 to swing rearward from the forward-most swing position around the rotation axis M. This causes the main piston 83 to move rearward from the forward-most position, thereby using the main piston 83 to pressurize the main cylinder 82. As a result, the liquid in the main cylinder 82 can be supplied to the storage space 40a of the storage cylinder 40 through the vertical supply tube portion 10.

[0080] 1 is moved rearward against the biasing force of the biasing member 60. As the storage plunger 50 moves rearward, the liquid in the storage space 40a, whose pressure has increased, can be ejected forward from the ejection hole 4. Therefore, every time the trigger portion 81 is pulled rearward, the liquid can be ejected from the ejection hole 4, and the storage plunger 50 can be moved rearward to store the liquid in the storage space 40a.

[0081] After the liquid is ejected, when the operation of the trigger portion 81 is released, the biasing force (elastic restoring force) of the coil spring 84 causes the trigger portion 81 to swing forward and return to its original position. Therefore, as shown in FIG. 2, the main piston 83 can be moved forward and restored as the trigger portion 81 swings forward, so that the main piston 83 can be used to reduce the pressure inside the main cylinder 82. This allows the liquid inside the container body A to be sucked up into the vertical supply tube portion 10 and introduced into the main cylinder 82. This makes it possible to prepare for the next ejection.

[0082] When the main piston 83 moves rearward as the trigger part 81 swings rearward, the sliding part 141 moves rearward away from the inlet port 82c, thereby opening the inlet port 82c. Therefore, during the time it takes for the main piston 83 to move back from the rear to its forwardmost position, outside air can be introduced into the container body A through the inlet port 82c and the outside air introduction passage 92 as the liquid in the container body A is sucked up into the vertical supply tube part 10. This prevents negative pressure from building up inside the container body A as the liquid is sucked up.

[0083] Furthermore, when the operation of the trigger part 81 is stopped after the liquid has been filled into the storage cylinder 40, the supply of liquid into the storage cylinder 40 through the vertical supply tube part 10 stops, but the storage plunger 50 begins to move forward in its restoration state due to the biasing force of the biasing member 60. This allows the liquid in a pressurized state that has accumulated in the storage space 40a to continue to be sprayed forward through the spray hole 4.

[0084] Therefore, according to the trigger type liquid ejector 1 of this embodiment, liquid can be ejected even when the trigger part 81 is not operated, and liquid can be ejected continuously. In particular, since the trigger portion 81 is connected to the main piston 83 via the connecting shaft 169 inserted into the connecting hole 151, when the trigger portion 81 is swung rearward, the stress (operating force) acting on the trigger portion 81 can be directly transmitted to the main piston 83. This allows the main piston 83 to be pushed into the main cylinder 82 in conjunction with the swinging of the trigger portion 81, thereby appropriately pressurizing the inside of the main cylinder 82. Similarly, when the trigger portion 81 is swung forward by the biasing force of the coil spring 84, the forward biasing force acting on the trigger portion 81 can be directly transmitted to the main piston 83 via the connecting portion 150. This allows the main piston 83 to move forward and return to its original position as the trigger portion 81 swings forward, thereby reducing the pressure inside the main cylinder 82.

[0085] The trigger portion 81 is disposed on the inner side of the pair of side covers 86 in the left-right direction, and has a locking protrusion 170 that is inserted into a locking hole 87 formed in the side cover 86. The locking protrusion 170 is movable along the locking hole 87 as the trigger portion 81 swings (see FIG. 6). Therefore, the trigger portion 81 is guided from the outside in the left-right direction by the pair of side covers 86, and swings while the locking protrusion 170 is guided within the locking hole 87. Therefore, the trigger portion 81 can be swung stably and smoothly while preventing rattling and the like.

[0086] In particular, when the trigger portion 81 is located in the forward-most swing position (when the main piston 83 is located in the forward-most position), the locking protrusion 170 is arranged to face the front edge 87a of the locking hole 87 so as to be able to be locked from behind. Therefore, even if an unexpected external force acts on the trigger portion 81 in the forward direction, for example, during product distribution or product display, the locking protrusion 170 can be locked from behind with the front edge 87a of the locking hole 87, and the trigger portion 81 can be prevented from moving further forward from the forward-most swing position. Therefore, the connection between the trigger portion 81 and the connecting portion 150 of the main piston 83 can be maintained, and the trigger portion 81 can be prevented from coming off the main piston 83.

[0087] Therefore, the main piston 83 can be appropriately kept in the forwardmost position, the main piston 83 can be operated with an appropriate stroke amount, and the sealing between the main cylinder 82 can be maintained to prevent fluid leakage, etc. In particular, since the main piston 83 can be appropriately kept at the frontmost position, the sliding portion 141 of the piston body 140 can maintain a stable and appropriate closed state of the inlet port 82c of the outside air introduction passage 92. This can prevent the occurrence of liquid leakage, such as leakage of the liquid inside the container body A to the outside through the inlet port 82c.

[0088] As described above, according to the trigger-type liquid ejector 1 of this embodiment, even if an unexpected external force is applied forward to the trigger part 81, it is possible to prevent the trigger part 81 from coming off the main piston 83. Therefore, it is possible to provide a trigger-type liquid ejector 1 with improved operability and quality.

[0089] Furthermore, because the locking protrusion 170 is inserted into the locking hole 87 while penetrating the side cover 86 in the left-right direction, the locking protrusion 170 can be fully inserted into the locking hole 87, making it less likely that the locking protrusion 170 will accidentally come out of the locking hole 87. Furthermore, if an unexpected external force acts on the trigger portion 81 in the forward direction, the locking protrusion 170 can be fully locked from the rear with the front edge 87a of the locking hole 87. Therefore, the trigger portion 81 can be effectively prevented from moving further forward from the forwardmost swing position, and the trigger portion 81 can be further prevented from coming off the main piston 83.

[0090] Furthermore, as shown in Figure 5, a flange 88 is formed continuously on the outer surface of the side cover 86 along the opening edge of the locking hole 87, so the area around the opening of the locking hole 87 can be made thicker due to the formation of the flange 88. This increases the rigidity of the side cover 86 itself, making it less likely that the side cover 86 will deform, for example, by expanding outward in the left-right direction. This further prevents the locking protrusions 170 from slipping out of the locking holes 87.

[0091] Furthermore, if an unexpected external force acts on the trigger portion 81 in the forward direction, the locking protrusion 170 can be locked from the rear while making surface contact with the front edge 87a of the locking hole 87. Therefore, the locking protrusion 170 can be more firmly locked to the front edge 87a of the locking hole 87, and the trigger portion 81 can be more effectively prevented from coming off the main piston 83.

[0092] Furthermore, when assembling the trigger-type liquid sprayer 1, as shown in Figure 7, by bringing the set surface 171 into contact with the front end of the side cover 86 from the front and pushing the trigger portion 81 from the front as indicated by arrow F, the trigger portion 81 can be set inside the pair of side covers 86 so as to slide on the set surface 171. In this way, the set surface 171 can be used as a guide surface to smoothly guide the trigger portion 81 inside the pair of side covers 86, allowing for efficient assembly and improving the ease of assembly.

[0093] Furthermore, since the coil spring 84 is disposed between the receiving member 85 and the trigger portion 81, it is disposed outside the main cylinder 82. This prevents 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. Furthermore, the coil spring 84 can have high spring properties suitable for continuous spraying. The material for the coil spring 84 is not limited to metal, and a resin spring, for example, may also be used.

[0094] 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 spirit 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, and those that are equivalent.

[0095] For example, in the above embodiment, the trigger type liquid ejector 1 is described as being capable of continuous ejection by being provided with the storage cylinder 40 and the storage plunger 50, but is not limited to continuous ejection. Therefore, the storage cylinder 40 and the storage plunger 50 are not essential and may not be provided. In addition, if the storage plunger 50 functioning as a pressure accumulator valve is not provided, a pressure accumulator valve may be provided in the injection tube portion 70, or a pressure accumulator valve may be provided in the nozzle member 3, or any other known pressure accumulator valve may be appropriately adopted.

[0096] Furthermore, in the above embodiment, the pair of side covers 86 is formed on the receiving member 85, but the present invention is not limited to this. For example, the pair of side covers 86 may be formed integrally with the main cylinder 82 or the cylinder tubular portion 110.

[0097] Furthermore, in the above embodiment, the locking hole 87 is formed so as to penetrate the side cover 86 in the left-right direction as an example of the locking recess, but this is not limited to this. For example, a locking groove that opens inward in the left-right direction may be formed on the inner surface of the side cover 86 to function as the locking recess. Even in this case, the same effect can be achieved by inserting the locking protrusion 170 into the locking groove.

[0098] Furthermore, in the above embodiment, the locking hole 87 is formed to extend in the front-rear direction, but this is not limited to this case, and the locking hole 87 may be formed, for example, in an arc shape centered on the rotation axis M. In this case, the opening width W of the locking hole 87 and the diameter of the locking protrusion 170 can be made approximately the same.

[0099] Furthermore, the present invention includes the following aspects. <1> an ejector body attached to a container containing a liquid; a nozzle member attached to the ejector body and having an ejection hole for ejecting the liquid; The ejector body includes: a vertical supply tube portion for sucking up the liquid in the container body; a trigger mechanism including a trigger portion disposed in front of the vertical supply tube portion so as to be swingable rearward about a rotation axis in a forward biased state, the trigger portion swinging rearward from a frontmost swing position causing the liquid to flow from inside the vertical supply tube portion toward the ejection hole; a storage cylinder extending in the front-rear direction and into which the liquid that has passed through the vertical supply tube portion is supplied by rearward swing of the trigger portion; a storage plunger that is movably disposed within the storage cylinder and that moves rearward and is urged forward as liquid is supplied into the storage cylinder; The trigger mechanism comprises: a main cylinder formed in a cylindrical shape with a bottom that opens forward and communicates with the inside of the vertical supply cylindrical portion; a main piston having a piston body that is in sliding contact with an inner surface of the main cylinder and is movable back and forth, and a connecting part that extends forward from the piston body and is connected to the trigger part, the main piston moving rearward from a forwardmost position as the trigger part swings rearward to pressurize the inside of the main cylinder; a biasing member that biases the trigger portion forward; a receiving member that supports the biasing member from behind; a pair of side covers that protrude forward beyond the main cylinder and cover the biasing member and the trigger portion from both left and right sides, the ejector body has an inlet opening on an inner circumferential surface of the main cylinder, and is provided with an outside air introduction passage for introducing outside air into the container body through the inlet, the biasing member is disposed between the receiving member and the trigger portion, and is formed in a cylindrical shape extending in the front-rear direction with the main piston inserted therein; When the main piston is located at the forward-most position, the piston body closes the inlet port, The pair of side covers are each formed with a locking recess that extends in the front-rear direction and opens inward in the left-right direction, the trigger portions have locking protrusions that protrude outward in the left-right direction, and are disposed on the inner sides of the pair of side covers in the left-right direction with the locking protrusions inserted into the locking recesses, A trigger-type liquid ejector characterized in that the locking protrusion is movable along the locking recess as the trigger portion swings, and is positioned so as to face the front edge of the locking recess from behind and be able to be locked when the trigger portion is positioned in the forwardmost swing position. <2> <1> In the trigger-type liquid ejector described in The locking recess is formed to penetrate the side cover in the left-right direction, The locking protrusion is inserted into the locking recess in a state where it penetrates the side cover in the left-right direction. <3> <2> In the trigger-type liquid ejector described in A trigger-type liquid ejector in which a flange portion is formed on the outer surface of the side cover facing outward in the left-right direction, the flange portion extending continuously along the opening edge of the locking recess and protruding outward in the left-right direction. <4> <1> from <3> In the trigger-type liquid ejector described in any one of The locking projection is formed in a cylindrical shape, A trigger-type liquid ejector wherein at least the front edge of the locking recess is formed into a curved surface that bulges forward to correspond to the outer shape of the locking protrusion, allowing the locking protrusion to make surface contact. <5> <4> In the trigger-type liquid ejector described in In the trigger-type liquid ejector, the locking projection has a set surface formed thereon that is inclined so as to extend forward as it moves from the inside to the outside in the left-right direction and that faces rearward. [Explanation of symbols]

[0100] M...rotation axis A...Container body 1...Trigger-type liquid sprayer 2...Ejector body 3...Nozzle member 4…Blowout hole 10...Vertical supply tube 40...Storage cylinder 50...Reservoir plunger 80...Trigger mechanism 81...Trigger section 82...Main cylinder 82c...Entrance 83...Main piston 84... Coil spring (biasing member) 85...Receiving member 86...Side cover 87...Latching hole (locking recess) 88...Flange 92... Fresh air intake passage 140...Piston body 150...Connection part 170...Latching protrusion 171...Set surface

Claims

1. an ejector body attached to a container containing a liquid; a nozzle member attached to the ejector body and having an ejection hole for ejecting the liquid; The ejector body includes: a vertical supply tube portion for sucking up the liquid in the container body; a trigger mechanism including a trigger portion disposed in front of the vertical supply tube portion so as to be swingable rearward about a rotation axis in a forward biased state, the trigger portion swinging rearward from a frontmost swing position causing the liquid to flow from inside the vertical supply tube portion toward the ejection hole; a storage cylinder extending in the front-rear direction and into which the liquid that has passed through the vertical supply tube portion is supplied by rearward swing of the trigger portion; a storage plunger that is movably disposed within the storage cylinder and that moves rearward and is urged forward as liquid is supplied into the storage cylinder; The trigger mechanism includes: a main cylinder formed in a cylindrical shape with a bottom that opens forward and communicates with the inside of the vertical supply cylindrical portion; a main piston having a piston body that is in sliding contact with an inner surface of the main cylinder and is movable back and forth, and a connecting part that extends forward from the piston body and is connected to the trigger part, the main piston moving rearward from a forwardmost position as the trigger part swings rearward to pressurize the inside of the main cylinder; a biasing member that biases the trigger portion forward; a receiving member that supports the biasing member from behind; a pair of side covers that protrude forward beyond the main cylinder and cover the biasing member and the trigger portion from both left and right sides, the ejector body has an inlet opening on an inner circumferential surface of the main cylinder, and is provided with an outside air introduction passage for introducing outside air into the container body through the inlet, the biasing member is disposed between the receiving member and the trigger portion, and is formed in a cylindrical shape extending in the front-rear direction with the main piston inserted therein; When the main piston is located at the forward-most position, the piston body closes the inlet port, The pair of side covers are each formed with a locking recess that extends in the front-rear direction and opens inward in the left-right direction, the trigger portions have locking protrusions that protrude outward in the left-right direction, and are disposed on the inner sides of the pair of side covers in the left-right direction with the locking protrusions inserted into the locking recesses, A trigger-type liquid ejector characterized in that the locking protrusion is movable along the locking recess as the trigger portion swings, and is positioned so as to face the front edge of the locking recess from behind and be able to be locked when the trigger portion is positioned in the forwardmost swing position.

2. The trigger-type liquid ejector according to claim 1, The locking recess is formed to penetrate the side cover in the left-right direction, The locking protrusion is inserted into the locking recess in a state where it penetrates the side cover in the left-right direction.

3. The trigger-type liquid ejector according to claim 2, A trigger-type liquid ejector in which a flange portion is formed on the outer surface of the side cover facing outward in the left-right direction, the flange portion extending continuously along the opening edge of the locking recess and protruding outward in the left-right direction.

4. The trigger-type liquid ejector according to claim 1, The locking projection is formed in a cylindrical shape, A trigger-type liquid ejector wherein at least the front edge of the locking recess is formed into a curved surface that bulges forward in accordance with the outer shape of the locking protrusion, allowing the locking protrusion to make surface contact therewith.

5. The trigger-type liquid ejector according to claim 4, In the trigger-type liquid ejector, the locking projection is formed with a set surface that is inclined so as to extend forward as it moves from the inside to the outside in the left-right direction and that faces rearward.

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