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: The connecting portion 150 of the main piston 83 includes the connecting shaft 151 extending forward from the front end portion of the piston body 140 and having the pressed surface 151a facing forward, and the first connecting arm portion 152 and the second connecting arm portion 155 disposed so as to face each other with the gap N therebetween. The trigger 81 includes the pressing portion 180 that is disposed between the first connection arm portion and the second connection arm portion when the trigger 81 is located at the foremost swing position and comes into contact with the pressed surface from the front, and at least one connection arm portion of the first connection arm portion and the second connection arm portion includes the hook portion 160 that is disposed in front of the pressing portion in contact with the pressed surface and is hooked by the pressing portion from the rear.SELECTED DRAWING: Figure 2

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 liquid, and a nozzle member attached to the ejector body and having an ejection hole formed therein for ejecting the liquid, the ejector body having 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, the trigger portion swinging rearward causes the liquid to flow from inside the vertical supply tube portion toward the ejection hole side, and a trigger mechanism extending in the front-rear direction and facing rearward of the trigger portion. The trigger mechanism is provided with a storage cylinder into which the liquid that has passed through the vertical supply tube portion is supplied by swinging, 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 is formed in a cylindrical shape with a bottom that opens forward and communicates with the interior of the vertical supply tube 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 part that extends forward from the front end of the piston body, and is configured to be movable rearward from the most forward swing position. a main piston that moves rearward from a frontmost position in accordance with the swing of the trigger portion toward the main cylinder and pressurizes the inside of the main cylinder; a biasing member that biases the trigger portion forward; and a receiving member that supports the biasing member from the rear, wherein the ejector body has an inlet that opens to the inner circumferential surface of the main cylinder and is provided with an outside air introduction passage that introduces 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 that extends in the front-rear direction with the main piston inserted inside, When the trigger is located at the forwardmost position, the piston body closes the introduction port, the connecting portion includes a connecting shaft that extends forward from the front end of the piston body and has a pressed surface facing forward, and a first connecting arm and a second connecting arm that extend further forward from the connecting shaft and are arranged to face each other with a gap therebetween, and the trigger portion is located between the first connecting arm and the second connecting arm when located at the forwardmost swing position and has a pressing portion that contacts the pressed surface from the front,At least one of the first connecting arm and the second connecting arm is disposed in front of the pressing portion that is in contact with the pressed surface, and is provided with a hook portion that the pressing portion hooks onto from behind.

[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, the trigger has a pressing part that contacts the pressed surface formed on the connecting shaft of the main piston from the front, so when the trigger is swung rearward from its forwardmost swing position, the stress (operating force) acting on the trigger can be transmitted directly to the main piston. This allows the main piston to be pushed into the main cylinder in conjunction with the swing of the trigger, thereby appropriately pressurizing the inside of the main cylinder. On the other hand, when the trigger swings forward due to the biasing force of the biasing member, the pressing portion hooks from behind on the hook portion located in front of the pressing portion. This allows the forward biasing force acting on the trigger to be directly transmitted to the main piston via the pressing portion and the hook portion. 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. In this way, when the main piston is moved backward to pressurize the inside of the main cylinder, the pressed surface and pressing portion, which are in contact with each other, can be used, and when the main piston is moved forward to restore its original position to reduce the pressure inside the main cylinder, the hook portion and pressing portion can be used.

[0012] Furthermore, by operating the trigger portion and swinging it backward, liquid can be supplied from inside the vertical supply tube portion into the storage cylinder. This allows the liquid to be pressurized inside the storage plunger. After that, when the liquid pressure reaches a predetermined value, the storage plunger moves backward against the biasing force. Therefore, each time the trigger portion is pulled, the storage plunger is moved backward, allowing the liquid to be sprayed while storing (filling) the liquid in the storage cylinder. In particular, the biasing member is located between the receiving member and the trigger portion, and is therefore located outside the main cylinder and does not come into contact with the liquid. Therefore, the material can be freely selected regardless of the liquid, and the biasing member can 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] Furthermore, when the trigger is in the forwardmost swing position, the pressing portion formed on the trigger is disposed between the first connecting arm and the second connecting arm and is in contact with the pressed surface of the main piston from the front. A hook portion is disposed in front of the pressing portion. Therefore, even if an unexpected external force acts on the trigger portion in a forward direction while the main piston is in the forwardmost position, for example, during product distribution or product display, the pressing portion catches on the hook portion from behind, preventing the trigger portion from swinging forward, thereby preventing the trigger portion 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.

[0015] 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.

[0016] (2) The pressing portion may be formed in the shape of an axis extending along the left-right direction, and the first connecting arm portion and the second connecting arm portion may be arranged to face each other in the up-down direction with the pressing portion therebetween.

[0017] In this case, since the pressing portion is formed in an axial shape, even if an unexpected external force acts on the trigger portion from the left or right, for example, the pressing portion can be prevented from coming out from between the first connecting arm portion and the second connecting arm portion.

[0018] (3) The first connecting arm and the second connecting arm may be elastically displaceable in a direction such that their front ends move away from each other, with the connection point with the connecting shaft as a base point, and the trigger may be set to the forwardmost swing position by inserting the pressing portion between the first connecting arm and the second connecting arm from the front through the gap while elastically displacing the first connecting arm and the second connecting arm.

[0019] In this case, the trigger unit can be easily assembled to the main cylinder during the assembly process of the trigger-type liquid ejector. Specifically, the trigger unit is assembled to the main cylinder so that the pressing unit is pushed from the front into the gap formed between the first connecting arm unit and the second connecting arm unit. This allows the pressing unit to enter between the first connecting arm unit and the second connecting arm unit through the gap while elastically deforming the front ends of the first connecting arm unit and the second connecting arm unit in directions separating them from each other. This allows the main cylinder and the trigger unit to be assembled with the trigger unit set to the forward-most swing position where the pressing unit contacts the pressed surface. In this way, the main cylinder and the trigger portion can be assembled by the simple method of simply pushing the pressing portion into the gap from the front, which leads to improved assembly efficiency of the trigger-type liquid ejector.

[0020] Furthermore, even if the pressing portion is disengaged from between the first connecting arm and the second connecting arm due to an unexpected external force from the left or right, for example, the pressing portion can be pushed in from the front through the gap as described above. Therefore, the pressing portion can be immediately restored to between the first connecting arm and the second connecting arm while maintaining the main piston in the forward-most position.

[0021] (4) The hook portion may be formed so as to protrude from the front end of the first connecting arm portion toward the front end of the second connecting arm portion, and then approach the second connecting arm portion as it moves toward the rear, and the hook portion may have a contact surface facing rearward and positioned in front of the pressing portion.

[0022] In this case, the hook portion is formed by folding back from the front end of the first connecting arm toward the rear, and the contact surface of the hook portion can be positioned over a wide area in front of the pressing portion, which makes it possible to more effectively prevent the trigger portion from coming off the main piston.

[0023] (5) The hook portion is formed with a first claw portion having a first engagement surface facing forward, and the front end of the second connecting arm portion is formed with a second claw portion having a second engagement surface facing rearward, and the hook portion is elastically displaceable forward with the front end of the first connecting arm portion as a base point, and the first engagement surface may be engaged with the second engagement surface from behind by the elastic displacement of the hook portion.

[0024] In this case, if an unexpected external force acts on the trigger portion in the forward direction, for example, if the pressing portion strongly presses the hook portion from behind, the hook portion can be elastically displaced with the front end of the first connecting arm as a base point. This allows the first locking surface of the first claw portion formed on the hook portion to be locked from behind with the second locking surface of the second claw portion formed on the front end of the second connecting arm. This restricts the forward movement of the hook portion itself, thereby more effectively preventing the trigger portion from coming off the main piston. [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]3 is a vertical cross-sectional view showing a state in which the main piston shown in FIG. 2 has moved rearward from the foremost position in response to rearward swing of the trigger portion. FIG. [Figure 4] FIG. 3 is a front view of the main piston shown in FIG. 2 as seen from the front. [Figure 5] FIG. 2 is a front view of the trigger portion shown in FIG. 1 as seen from the front. [Figure 6] FIG. 6 is a rear view of the trigger portion shown in FIG. 5 as seen from the rear. [Figure 7] 3 is a longitudinal cross-sectional view showing the relationship between the main piston and the pressing portion of the trigger portion shown in FIG. 2, showing a state in which the pressing portion is pressing the hook portion from behind. FIG. [Figure 8] FIG. 3 is a longitudinal cross-sectional view showing the relationship between the main piston and the pressing portion of the trigger portion shown in FIG. 2, in which the pressing portion is disposed forward of the hook portion, and shows a state immediately before the trigger portion is to be combined with the main piston. [Figure 9] 9 is a diagram showing a state in which the pressing portion enters from the front through the gap while elastically displacing the first connecting arm portion and the second connecting arm portion from the state shown in FIG. 8. 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] 1 and 2, a cylinder tube portion 110 is provided below the connecting tube portion 20 and above the attachment cap 30. The cylinder tube portion 110 protrudes forward from the vertical supply tube portion 10 and is open 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] A piston guide 82a protruding forward from the center of the rear wall and a communication hole 82b penetrating the rear wall in the front-to-rear direction are formed in the rear wall of the main cylinder 82. 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 (biasing member according to the present invention) 84, and a receiving member 85. The trigger mechanism 80 is capable of circulating the liquid from inside the vertical supply tube portion 10 through the connecting tube portion 20 toward the ejection hole 4 side by swinging the trigger portion 81 backward.

[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] 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 arranged between the receiving member 85 and the trigger portion 81 and urges the trigger portion 81 forward.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] (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 .

[0056] (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.

[0057] 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.

[0058] (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.

[0059] (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.

[0060] 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.

[0061] 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 forward-most position as shown in Fig. 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 as shown in Fig. 3, the front end of the main piston 83 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. As shown in FIG. 2, when the main piston 83 is located at the frontmost position, a sliding portion 141 formed at the rear end portion of the main piston 83 closes the inlet port 82c of the outside air introduction path.

[0062] As shown in Figures 2 and 4, the connecting portion 150 includes a connecting shaft 151 formed to extend forward from the front end of the piston body 140, and a first connecting arm 152 and a second connecting arm 155 formed to extend further forward from the connecting shaft 151.

[0063] The connecting shaft 151 is disposed coaxially with the axis O3 and has a rectangular shape when viewed from the front. In the illustrated example, the connecting shaft 151 is formed in the shape of a rectangular pillar with equal widths in the up-down direction and the left-right direction. A pressed surface 151a facing forward is formed on the front end surface of the connecting shaft 151. The pressed surface 151a extends in the left-right direction and is formed in a curved shape that is recessed in an arc shape toward the rear in a vertical cross-sectional view.

[0064] The first connecting arm 152 and the second connecting arm 155 extend further forward from the front end face of the connecting shaft 151 and are formed to face each other with a gap N between them. The first connecting arm 152 and the second connecting arm 155 are arranged to face each other in the vertical direction with a pressing portion 180 (described later) sandwiched therebetween. At least one of the first connecting arm 152 and the second connecting arm 155 is arranged in front of the pressing portion 180 that is in contact with the pressed surface 151a, and is provided with a hook portion 160 on which the pressing portion 180 is hooked from behind. In this embodiment, the first connecting arm portion 152 is provided with a hook portion 160 .

[0065] The first connecting arm 152 is formed in the shape of a plate having a constant thickness in the vertical direction and a constant width in the horizontal direction. The first connecting arm 152 has a base end 152a connected to the front end surface of the connecting shaft 151 and a front end 152b which is a free end. Similarly, the second connecting arm 155 is formed in the shape of a plate having a constant thickness in the up-down direction and a constant width in the left-right direction. The widths of the first connecting arm 152 and the second connecting arm 155 are formed to be equal to each other. Furthermore, the length along the front-rear direction of the first connecting arm 152 and the length along the front-rear direction of the second connecting arm 155 are formed to be equal to each other. The second connecting arm 155 has a base end 155a connected to the front end surface of the connecting shaft 151 and a front end 155b which is a free end.

[0066] The space between the first connecting arm 152 and the second connecting arm 155 is open in the left-right direction and also opens forward through the gap N. The pressing portion 180 is disposed in the space formed between the first connecting arm 152 and the second connecting arm 155 and is in contact with the pressed surface 151a from the front. Furthermore, the first connecting arm 152 and the second connecting arm 155 are elastically deformable in directions in which their respective front ends 152b, 155b move away from each other (outward in the left-right direction) with the base ends 152a, 155a, which are the connection parts with the connecting shaft 151, as base points (see Figure 9).

[0067] The hook portion 160 is formed so as to protrude (downward) from the front end portion 152b of the first connecting arm portion 152 toward the front end portion 155b of the second connecting arm portion 155, and then approach the second connecting arm portion 155 as it moves rearward. As a result, the hook portion 160 is disposed on the axis O3 and has a contact surface 161 that faces rearward. The contact surface 161 is a flat surface that intersects with the axis O3, and is in contact with the pressing portion 180 from the front.

[0068] Furthermore, a first claw portion 163 having a first locking surface 164 facing forward is formed on the hook portion 160. The first claw portion 163 is formed so as to protrude downward from the rear end portion of the hook portion 160. A part of the first claw portion 163 also serves as the contact surface 161. On the other hand, a second claw portion 166 having a second locking surface 167 facing rearward is formed on the front end portion 155b of the second connecting arm portion 155. The second claw portion 166 is formed so as to protrude upward from the front end portion 155b of the second connecting arm portion 155.

[0069] The hook portion 160 is elastically displaceable forward from the front end portion 152b of the first connecting arm portion 152. As a result, the first locking surface 164 is formed to lock onto the second locking surface 167 from behind by the elastic displacement of the hook portion 160 (see FIG. 7).

[0070] (Trigger section) 1 to 3, 5 and 6, the 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. The trigger portion 81 is disposed in front of the 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 170 and a pair of side plate portions 171 extending rearward from the side edges of the front plate portion 170. As a result, the inside of the trigger portion 81 is open rearward.

[0071] The front plate 170 is disposed in front of the main piston 83 and includes a first front plate 173 that is inclined forward from top to bottom, and a second front plate 174 that is recessed rearward from the lower end of the first front plate 173 and then extends while gently curving forward as it extends downward. This allows the rearward recess formed in the second front plate 174 to be used to hook a fingertip or the like.

[0072] 2, a through-hole 175 is formed in the first front plate portion 173, penetrating the first front plate portion 173 in the front-rear direction. The through-hole 175 is located in the center of the first front plate portion 173 in the left-right direction, and is formed in, for example, a rectangular shape when viewed from the front.

[0073] 2 and 6, the first front plate portion 173 is formed with a pair of internal side walls 176, an internal upper wall 177, and an internal lower wall 178, each of which extends rearward. The pair of internal side walls 176 are arranged to face each other in the left-right direction, and are arranged inside the pair of side plate portions 171 with a small gap between them. The internal upper wall 177 and the internal lower wall 178 are arranged to face each other in the up-down direction, and are formed to be continuous with the pair of internal side walls 176. An internal space surrounded by a pair of internal side walls 176, an internal upper wall 177, and an internal lower wall 178 functions as a storage space R that opens forward through the through-hole 175 and also opens rearward.

[0074] 2, the main piston 83 is positioned such that the connecting portion 150 enters the accommodation space R from the rear when the main piston 83 is located at the forward-most position. The coil spring 84 is positioned so as to contact the rear end edges of at least one pair of side plate portions 171 from the rear, while surrounding the main piston 83 from the outside in the cylinder radial direction. As a result, the trigger portion 81 is biased forward by the biasing force (elastic restoring force) of the coil spring 84.

[0075] 2, 5, and 6, a pressing portion 180 extending in the left-right direction is formed between the pair of inner side walls 176. The pressing portion 180 is formed in an axial (cylindrical) shape and is formed so as to connect the pair of inner side walls 176 to each other. Connecting ribs 179 extending in the front-rear direction are formed between the pair of side plate portions 171 and the pair of inner side walls 176. As shown in Fig. 6, the pressing portion 180 is formed to be aligned in a row in the left-right direction with respect to the connecting ribs 179 when the trigger portion 81 is viewed from the rear. As a result, the pressing portion 180 is formed integrally with the pair of side plate portions 171 via the pair of inner side walls 176 and the connecting ribs 179 in a state of high rigidity.

[0076] 2 and 3, when the trigger part 81 is located at the forward-most swing position, the pressing part 180 configured as described above is disposed in the space formed between the first connecting arm part 152 and the second connecting arm part 155, and is in contact with the pressed surface 151a from the front. This allows the pressing part 180 to directly transmit the stress (operating force) acting on the trigger part 81 to the main piston 83 while sliding on the pressed surface 151a as the trigger part 81 swings rearward. Furthermore, the pressing portion 180 is in contact with the contact surface 161 of the hook portion 160 from behind, and is thereby hooked onto the hook portion 160 from behind.

[0077] As described above, the trigger portion 81 and the main piston 83 are combined as a single unit and operate in conjunction with each other due to the contact of the pressing portion 180 with the pressed surface 151a and the engagement of the pressing portion 180 from behind with the hook portion 160. The main piston 83 moves rearward as the trigger portion 81 swings rearward and is pushed into the main cylinder 82, and then moves forward to restore its position as the trigger portion 81 swings forward.

[0078] Furthermore, the trigger 81 of this embodiment is set to the forward-most swing position shown in Fig. 2 by inserting the pressing portion 180 into the space between the first connecting arm 152 and the second connecting arm 155 from the front through the gap N while elastically displacing the first connecting arm 152 and the second connecting arm 155. This point will be described later.

[0079] (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.

[0080] 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.

[0081] 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 about the pivot axis M. As a result, as shown in FIG. 3 , the main piston 83 can be moved rearward from its frontmost position, and the main piston 83 can be used 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.

[0082] 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.

[0083] 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.

[0084] 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 (see FIG. 3). 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.

[0085] 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.

[0086] 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. 2 and 3, the trigger portion 81 in particular has a pressing portion 180 that slidably contacts from the front with a pressed surface 151a formed on the connecting shaft 151 of the piston body 140. Therefore, when the trigger portion 81 is swung rearward from the forwardmost swing position, the pressing portion 180 slides on the pressed surface 151a, and the stress (operating force) acting on the trigger portion 81 can be transmitted directly to the piston body 140. This allows the main piston 83 to be pushed into the main cylinder 82 in conjunction with the swing of the trigger portion 81, and the inside of the main cylinder 82 can be appropriately pressurized.

[0087] On the other hand, when the trigger portion 81 swings forward due to the biasing force of the coil spring 84, the pressing portion 180 catches from behind on the contact surface 161 of the hook portion 160 located in front of the pressing portion 180, as shown in Figures 2 and 3. This allows the forward biasing force acting on the trigger portion 81 to be directly transmitted to the main piston 83 via the pressing portion 180 and the hook portion 160. 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.

[0088] In this way, when the main piston 83 is moved backward to pressurize the inside of the main cylinder 82, the pressed surface 151a and the pressing portion 180, which are in contact with each other, can be used, and when the main piston 83 is moved forward to restore its original position to reduce the pressure inside the main cylinder 82, the hook portion 160 and the pressing portion 180 can be used.

[0089] Moreover, when the trigger portion 81 is positioned in the forwardmost swing position, the hook portion 160 is positioned in front of the pressing portion 180, which is positioned in the space between the first connecting arm portion 152 and the second connecting arm portion 155. Therefore, for example, when a product is distributed or displayed, even if an unexpected external force acts on the trigger portion 81 in a forward direction while the main piston 83 is in the forwardmost position, the pressing portion 180 catches on the hook portion 160 from behind, thereby preventing the trigger portion 81 from swinging forward. This prevents the trigger portion 81 from coming off the main piston 83.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] Furthermore, as shown in Figures 2 and 3, the pressing portion 180 of the trigger portion 81 is formed in a cylindrical shape extending in the left-right direction, so that even if an unexpected external force acts on the trigger portion 81 from the left-right direction, for example, the pressing portion 180 can be prevented from coming out of the space between the first connecting arm portion 152 and the second connecting arm portion 155.

[0094] Furthermore, the hook portion 160 is formed so as to be folded back rearward from the front end portion 152b of the first connecting arm portion 152, and the contact surface 161 of the hook portion 160 is disposed coaxially with the axis O3. This allows the contact surface 161 of the hook portion 160 to be disposed over a wide area in front of the pressing portion 180. Therefore, it is possible to more effectively prevent the trigger portion 81 from coming off the main piston 83.

[0095] Furthermore, the hook portion 160 is elastically deformable with the front end portion 152b of the first connecting arm portion 152 as a base point. Therefore, when an unexpected external force acts forward on the trigger portion 81, the hook portion 160 can be elastically deformed as shown by arrow F1 with the front end portion 152b of the first connecting arm portion 152 as a base point when the pressing portion 180 strongly presses the hook portion 160 from behind, as shown in Fig. 7. This allows the first locking surface 164 of the first claw portion 163 formed on the hook portion 160 to be locked from behind by the second locking surface 167 of the second claw portion 166 formed on the front end portion 155b of the second connecting arm portion 155. This makes it possible to restrict the forward movement of the hook portion 160 itself, thereby making it possible to more effectively prevent the trigger portion 81 from coming off the main piston 83.

[0096] Furthermore, the first connecting arm 152 and the second connecting arm 155 are elastically displaceable such that their respective front ends 152b, 155b move away from each other, starting from base ends 152a, 155a, which are the connection portions with the front end face of the connecting shaft 151. This allows the trigger portion 81 to be easily assembled to the main cylinder during the assembly process of the trigger-type liquid ejector 1.

[0097] 8 and 9, the trigger portion 81 is combined with the main cylinder 82 so that the pressing portion 180 is pressed from the front into the gap N formed between the first connecting arm portion 152 and the second connecting arm portion 155. This allows the pressing portion 180 to enter between the first connecting arm portion 152 and the second connecting arm portion 155 through the gap N while elastically deforming the first connecting arm portion 152 and the second connecting arm portion 155 in directions (outside in the left-right direction) in which the front ends 152b, 155b of the first connecting arm portion 152 and the second connecting arm portion 155 move away from each other, as indicated by arrow F2. As a result, as shown in FIG. 2, the main cylinder 82 and the trigger portion 81 can be combined with each other in a state in which the trigger portion 81 is set in the forwardmost swing position where the pressing portion 180 contacts the pressed surface 151a.

[0098] In this way, the main cylinder 82 and the trigger portion 81 can be combined by the simple method of simply pushing the pressing portion 180 into the gap N from the front, which leads to improved assembly efficiency of the trigger-type liquid ejector 1.

[0099] 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.

[0100] 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.

[0101] Furthermore, in the above embodiment, the pressing portion 180 of the trigger portion 81 is formed in a cylindrical shape extending in the left-right direction, but this is not limited to this case. For example, the pressing portion 180 may be formed in a so-called boss shape that protrudes inward in the left-right direction from each of the pair of inner side walls 176 of the trigger portion 81. However, if the pressing portion 180 is formed in a cylindrical shape as in the above embodiment, it is more preferable because it can prevent the pressing portion 180 from coming out from between the first connecting arm portion 152 and the second connecting arm portion 155 even if an unexpected external force acts on the trigger portion 81 from the left or right.

[0102] In addition, when the pressing portions 180 are formed as bosses protruding inward in the left-right direction from the pair of inner side walls 176 of the trigger portion 81, even if the pressing portions 180 are disengaged from between the first connecting arm portion 152 and the second connecting arm portion 155 due to an unexpected external force from the left or right direction, the pressing portion 180 can be pushed in from the front through the gap N as shown in Figures 8 and 9. Therefore, the pressing portion 180 can be immediately restored to the position between the first connecting arm portion 152 and the second connecting arm portion 155, and the main piston 83 can be returned to its frontmost position. [Explanation of symbols]

[0103] N...gap 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) 92... Fresh air intake passage 140...Piston body 150...Connection part 151a...Pressed surface 151...Connection shaft 152...First connecting arm 152a...base end portion of first connecting arm 152b...Front end of first connecting arm 155...Second connecting arm 155a...base end portion of second connecting arm 155b...Front end of second connecting arm 160...Hook part 161...Contact surface of hook 163...First claw part 164...First locking surface of first claw portion 166…Second claw part 167...Second locking surface of second claw

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 to cause 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 portion that extends forward from a front end portion of the piston body, the main piston moving rearward from its forwardmost position as the trigger portion swings rearward from its forwardmost swing position 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, 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 connecting portion is a connecting shaft extending forward from a front end of the piston body and having a pressure receiving surface facing forward; a first connecting arm portion and a second connecting arm portion extending further forward from the connecting shaft and arranged to face each other with a gap therebetween, the trigger portion is disposed between the first connecting arm portion and the second connecting arm portion when the trigger portion is located at the forwardmost swing position, and has a pressing portion that contacts the pressed surface from the front, A trigger-type liquid ejector characterized in that at least one of the first connecting arm and the second connecting arm is positioned in front of the pressing portion that is in contact with the pressed surface, and is equipped with a hook portion that hooks onto the pressing portion from behind.

2. The trigger-type liquid ejector according to claim 1, The pressing portion is formed in a shaft shape extending along the left-right direction, The trigger-type liquid ejector, wherein the first connecting arm and the second connecting arm are arranged to face each other in the vertical direction with the pressing portion therebetween.

3. 3. The trigger-type liquid ejector according to claim 1, the first connecting arm portion and the second connecting arm portion are elastically displaceable in directions such that their front ends move away from each other, with a connection point with the connecting shaft as a base point; A trigger-type liquid ejector in which the trigger portion is set to the forwardmost swing position by elastically displacing the first connecting arm portion and the second connecting arm portion while inserting the pressing portion between the first connecting arm portion and the second connecting arm portion from the front through the gap.

4. The trigger-type liquid ejector according to claim 3, the hook portion is formed to protrude from the front end portion of the first connecting arm portion toward the front end portion of the second connecting arm portion and then approach the second connecting arm portion as it extends rearward, The trigger-type liquid ejector further comprises a hook portion having a contact surface facing rearward and disposed in front of the pressing portion.

5. The trigger-type liquid ejector according to claim 4, The hook portion is formed with a first claw portion having a first engaging surface facing forward, a second claw portion having a second engaging surface facing rearward is formed at the front end portion of the second connecting arm portion; the hook portion is elastically displaceable forward from the front end portion of the first connecting arm portion as a base point, The first engaging surface engages with the second engaging surface from behind by elastic displacement of the hook portion.

Images