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: Provided is a trigger-type liquid dispenser including a main piston (83) having a piston body (140) and a connecting portion (150) and configured to pressurize an inside of a main cylinder (82) in accordance with rearward swinging of a trigger (81), wherein the connecting portion includes a pressed surface (142) facing forward and a locking surface (153) facing rearward, and the trigger includes a pressing piece (170) configured to come into slidable contact with the pressed surface from the front and a locking portion (180) configured to lock the locking surface from the rear.SELECTED DRAWING: Figure 5

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 wherein the trigger portion swings rearward to cause 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 swinging rearward to cause the liquid to flow from inside the vertical supply tube portion toward the ejection hole side, The trigger mechanism includes a storage cylinder into which liquid that has passed through the vertical supply tube portion is supplied, and 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 has a main cylinder that 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 able to move back and forth, and a connecting portion that extends forward from the front end of the piston body, and that moves rearward from the most forward position as the trigger portion swings rearward. and a main piston that applies pressure to 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 behind, 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, and when the main piston is located at the frontmost position, the piston body closes the inlet the connecting portion is provided at the front end of the piston body so as to be aligned in the left-right direction with the connecting portion therebetween, and includes a pressed surface facing forward, and a locking surface facing rearward, which is provided between the front end surface of the connecting portion and the front end of the piston body; the trigger portion protrudes rearward and includes a pressing piece that slidably contacts the pressed surface from the front, and a locking portion that locks with the locking surface from the rear, and the locking portion includes a support piece that is located inward in the left-right direction from the pressing piece, and a folded piece that is folded back from the support piece toward the inside in the left-right direction;and a locking piece formed to extend forward from the folded piece and lock onto the locking surface 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 and swinging it backward, the main piston can be moved backward from its forwardmost 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 holes, and the liquid can be ejected from the ejection holes 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 part is equipped with a pressing piece that slidably contacts the pressed surface formed on the piston body from the front, so that when the trigger part is swung rearward, the pressing piece slides on the pressed surface and the stress (operating force) acting on the trigger part can be transmitted directly to the piston body. This allows the main piston to be pushed into the main cylinder in conjunction with the swing of the trigger part, and the main cylinder can be appropriately pressurized. On the other hand, when the trigger swings forward due to the biasing force of the biasing member, the locking portion of the trigger locks onto the locking surface formed on the connecting portion of the main piston from behind, so the forward biasing force acting on the trigger can be transmitted directly to the connecting portion, allowing the main piston to move back to its original position in the forward direction 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 piece that come into 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 locking surface and locking portion that lock together can be used.

[0012] Furthermore, by operating the trigger portion and swinging it backward, liquid can be supplied from the vertical supply tube portion into the storage cylinder. This allows the liquid to be pressurized in 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, the locking portion is formed so as to extend forward from the support piece via a folded piece, and has a locking piece that locks onto the locking surface from the rear. Therefore, the locking portion has a folded structure, and the locking piece, which is the free end, locks onto the locking surface from the rear. 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 locking piece is not only unlikely to be released from the locking surface, but the locking piece is actually pressed firmly against the locking surface, thereby strengthening the lock. This prevents the trigger portion from coming off the main piston. Therefore, even when the trigger is not in use, the main piston can be kept in the forwardmost position appropriately, allowing the main piston to operate with an appropriate stroke amount and maintaining a seal between the main cylinder and the trigger, thereby preventing liquid leakage. This results in a trigger-type liquid sprayer with improved operability and quality.

[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 locking piece may be formed so as to extend inward in the left-right direction as it moves forward from the folded piece.

[0017] In this case, if an unexpected external force acts on the trigger in the forward direction while the main piston is in the forwardmost position, the locking piece will remain engaged with the locking surface and will move inward in the left-right direction from the connection point with the folded piece. This allows the locking piece to be deeply engaged with the locking surface, further effectively preventing the trigger from coming off the main piston.

[0018] (3) The folded piece may be formed to be thinner than the locking piece.

[0019] In this case, the locking piece can be more easily displaced inward in the left-right direction from the connection point with the thin-walled folded piece, which allows the locking piece to be more reliably locked onto the locking surface, making it even more difficult for the trigger to come off the main piston.

[0020] (4) A locking recess is formed on the side of the connecting portion, which is recessed inward in the left-right direction and opens upward and downward, and the front wall surface facing rearward of the inner wall surfaces defining the locking recess is the locking surface, and the locking piece may be locked to the locking surface from behind while inserted into the locking recess from the outside in the left-right direction.

[0021] In this case, since the locking piece is inserted into the locking recess, it is easy to stably and sufficiently lock the locking piece to the locking surface (front wall surface) of the locking recess. Also, the trigger part and the main piston can be combined integrally with a simple structure in which the locking piece is simply locked in the locking recess formed in the connecting part. Therefore, it is possible to achieve a trigger-type liquid ejector with improved assembly efficiency.

[0022] (5) When viewed from the side in the left-right direction, the locking piece has a convex shape that bulges forward, and the front end edge of the locking piece has a peak that bulges most forward and a pair of inclined edges that incline so as to extend rearward as they extend upward and downward from the peak, and when the main piston is located at the forwardmost position, the locking piece may be engaged with the inclined edge of the pair that is located below the peak in face-to-face contact with the locking surface.

[0023] In this case, the front edge of the locking piece can be formed into a convex shape that bulges forward in a triangular shape in side view, with a peak and a pair of inclined edges. When the main piston is in its forward-most position, the inclined edges located below the peak are engaged with the locking surface in a rearward surface-to-surface contact state. This ensures a sufficient contact area between the locking surface and the locking piece, allowing the locking piece to be more firmly engaged with the locking surface. This further effectively prevents the trigger from coming off the main piston.

[0024] Furthermore, when the trigger is swung backward, the inclined edge located above the apex can be locked with the locking surface. This makes it easy to stably and efficiently transmit the forward biasing force acting on the trigger to the connecting part when swinging the trigger forward. Therefore, the main piston can be easily restored forward smoothly as the trigger swings forward. [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] 3 is a perspective view (including a partial cross-sectional view) showing the relationship between the main piston and the trigger portion shown in FIG. 2.

[0023] FIG. [Figure 5] FIG. 3 is a cross-sectional view taken along the line AA shown in FIG. 2. [Figure 6]FIG. 2 is a perspective view of the trigger portion and the main piston shown in FIG. 1. [Figure 7] FIG. 7 is a perspective view of the trigger portion shown in FIG. 6. [Figure 8] FIG. 10 is a cross-sectional view showing a modified example of the present embodiment, illustrating the relationship between the main piston and the trigger portion. 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 (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] 2, 4, and 5, a pair of pressed surfaces 142 facing forward is formed on the front end of the main piston 83. The pair of pressed surfaces 142 are arranged side by side in the left-right direction with the connecting portion 150 sandwiched therebetween. The pair of pressed surfaces 142 are formed in a curved shape that is recessed in an arc shape toward the rear in a side view seen from the left-right direction.

[0063] The connecting portion 150 is formed in the shape of a vertically long plate extending forward from the front end portion of the piston body 140. Therefore, a front end surface 151 of the connecting portion 150 is formed so as to be flat in the up-down direction in a vertical cross section and flat in the left-right direction in a horizontal cross section. A pair of locking recesses 152 recessed inward in the left-right direction are formed on the side surfaces of the connecting portion 150 facing the left-right direction. The pair of locking recesses 152 are formed in a portion of the connecting portion 150 that is located between the front end surface 151 and the base end portion of the connecting portion 150 (the portion where the connecting portion 150 and the front end portion of the piston body 140 are joined). The pair of locking recesses 152 are formed so as to open outward in the left-right direction and also open upward and downward.

[0064] Therefore, the pair of locking recesses 152 have inner wall surfaces formed by locking surfaces 153, which are front wall surfaces facing rearward, rear wall surfaces 154, which face forward and face opposite the locking surfaces 153, and side wall surfaces 155, which face outward in the left-right direction and are connected to the locking surfaces 153 and the rear wall surfaces 154. The connecting portion 150 has a pair of locking recesses 152, and thus the tip portion is formed in an arrowhead shape that bulges out in the left-right direction.

[0065] (Trigger section) 1, 6, and 7, 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. 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 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.

[0066] 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.

[0067] 2, 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.

[0068] As shown in Figures 2 and 4 to 7, the first front plate portion 163 is formed with a pair of internal side walls 166, an internal upper wall 167, and an internal lower wall 168, each of which extends rearward. The pair of internal side walls 166 are arranged to face each other in the left-right direction, and are arranged inside the pair of side plate portions 161 with a small gap between them. The internal upper wall 167 and the internal lower wall 168 are arranged to face each other in the up-down direction, and are formed to be continuous with the pair of internal side walls 166. An internal space surrounded by a pair of internal side walls 166, an internal upper wall 167, and an internal lower wall 168 functions as a storage space R that opens forward through the through-hole 165 and also opens rearward.

[0069] 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 frontmost position. The coil spring 84 is disposed so as to contact the rear end edges of at least one pair of side plate portions 161 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.

[0070] Between the pair of side plate portions 161 and the pair of inner side walls 166, connecting ribs 169 extending along the front-rear direction are formed, respectively. Furthermore, a pressing piece 170 is formed at the rear end of the connecting rib 169 so as to protrude rearward beyond the trigger portion 81 and to slidably contact each of a pair of pressed surfaces 142 formed on the main piston 83 from the front.

[0071] The pressing piece 170 is formed in an arc shape that bulges rearward in a side view seen from the left and right direction, so that the pressing piece 170 can directly transmit the stress (operating force) acting on the trigger part 81 to the main piston 83 while sliding on the pressed surface 142 as the trigger part 81 swings rearward.

[0072] Furthermore, the trigger portion 81 is provided with a pair of locking portions 180 that lock onto locking surfaces 153 formed on the main piston 83 from the rear. The locking portion 180 includes the pair of inner side walls (supporting pieces according to the present invention) 166 arranged inside the pressing piece 170 in the left-right direction, an intermediate piece 181 extending rearward from the rear end of the pair of inner side walls 166, a folded-back piece 182 folded back inward in the left-right direction from the rear end of the intermediate piece 181, and a locking piece 183 extending forward from the folded-back piece 182. This gives the locking portion 180 a so-called folded structure.

[0073] The intermediate pieces 181 are formed so as to protrude rearward from the rear ends of the pair of inner side walls 166 beyond the locking surfaces 153, and are formed so as to turn inward in the left-right direction as they extend rearward. The folded-back pieces 182 are connected to the pair of inner side walls 166 via the intermediate pieces 181. However, the intermediate pieces 181 are not essential and may be omitted. In this case, the folded-back pieces 182 may be formed by folding back the rear ends of the pair of inner side walls 166 inward in the left-right direction.

[0074] The locking piece 183 is formed to extend inward in the left-right direction as it moves forward from the folded piece 182, and is locked to the locking surface 153 from the rear. Furthermore, the locking piece 183 is locked to the locking surface 153 in a state where it enters the locking recess 152 from the outside in the left-right direction (see FIG. 5).

[0075] Furthermore, locking piece 183 has a convex shape that bulges forward in a side view seen from the left and right, as shown in Fig. 4. Specifically, the front edge of locking piece 183 has apex 183a that bulges most forward, and a pair of inclined edges 183b that are inclined upward and downward from apex 183a and extend rearward. As shown in Figures 2 and 4, when the main piston 83 is located in the forwardmost position, the locking piece 183 is locked in a state where the inclined edge portion 183b, which is located below the top portion 183a, of the pair of inclined edge portions 183b is in surface contact with the locking surface 153.

[0076] 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 through the contact of the pressing piece 170 with the pressed surface 142 and the engagement of the locking portion 180 from behind with the locking surface 153. 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 again as the trigger portion 81 swings forward and is positioned at the foremost position.

[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 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.

[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 (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.

[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. 6, the trigger portion 81 in particular is provided with a pressing piece 170 that slidably contacts from the front with a pressed surface 142 formed on the piston body 140. Therefore, when the trigger portion 81 is swung rearward, the pressing piece 170 slides on the pressed surface 142, 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.

[0085] On the other hand, when the trigger portion 81 swings forward due to the biasing force of the coil spring 84, the locking portion 180 of the trigger portion 81 locks onto the locking surface 153 formed on the main piston 83 from behind, as shown in Figures 4 and 5, so the forward biasing force acting on the trigger portion 81 can be directly transmitted to the connecting portion 150. As a result, the main piston 83 can be restored forward as the trigger portion 81 swings forward, and the pressure inside the main cylinder 82 can be reduced.

[0086] In this way, when the main piston 83 is moved backward to pressurize the inside of the main cylinder 82, the pressed surface 142 and the pressing piece 170, which come into 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 locking surface 153 and the locking portion 180, which lock with each other, can be used.

[0087] Moreover, locking portion 180 is formed so as to extend forward via folded piece 182, and has locking piece 183 that locks onto locking surface 153 from behind. Therefore, locking portion 180 has a folded structure, and locking piece 183, which is the free end, locks onto locking surface 153 from behind. Therefore, for example, when a product is distributed or displayed, even if an unexpected external force acts forward on the trigger part 81 while the main piston 83 is in the forwardmost position, not only is the engagement of the locking piece 183 with the locking surface 153 difficult to be released, but rather the locking piece 183 is pressed firmly against the locking surface 153, making the engagement stronger.

[0088] This prevents the trigger part 81 from coming off the main piston 83. Therefore, the main piston 83 can be appropriately kept in the frontmost position, the main piston 83 can be operated with an appropriate stroke amount, and the sealing between the main cylinder 82 and the trigger part 81 can be maintained to prevent the occurrence of 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.

[0089] 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.

[0090] Furthermore, the locking piece 183 is formed so as to extend inward in the left-right direction as it extends forward from the folded piece 182. If an unexpected external force acts forward on the trigger portion 81 while the main piston 83 is in the forward-most position, the locking piece 183 will remain locked to the locking surface 153 and will be displaced further inward in the left-right direction from the connection point with the folded piece 182 as the base point. Therefore, the locking piece 183 can be locked so as to be deeply engaged with the locking surface 153. Therefore, the trigger portion 81 can be more effectively prevented from coming off the main piston 83.

[0091] 5, the locking piece 183 is inserted into the locking recess 152 formed in the connecting part 150 from the outside in the left-right direction, and is locked to the locking surface 153 from behind. Therefore, the locking piece 183 can be easily and stably locked to the locking surface 153. Also, the trigger part 81 and the main piston 83 can be combined integrally with a simple configuration in which the locking piece 183 is simply locked in the locking recess 152 formed in the connecting part 150. Therefore, the trigger-type liquid ejector 1 can be made easier to assemble.

[0092] Furthermore, the front edge of the locking piece 183 includes a top 183a and a pair of inclined edges 183b, and has a convex shape that bulges forward into a triangle when viewed from the side. 2 and 4, when the main piston 83 is at its front-most position, the inclined edges 183b of the locking piece 183, which are located below the top 183a, are in surface contact with the locking surface 153 from the rear. Therefore, the contact area between the locking surface 153 and the locking piece 183 can be secured, and the locking piece 183 can be more firmly locked to the locking surface 153. Therefore, the trigger portion 81 can be more effectively prevented from coming off the main piston 83.

[0093] 3, when the trigger portion 81 is swung backward, the inclined edge portion 183b located above the apex 183a can be locked with the locking surface 153. As a result, when the trigger portion 81 is swung forward using the biasing force of the coil spring 84, the forward biasing force acting on the trigger portion 81 can be easily and stably transmitted to the connecting portion 150. Therefore, the main piston 83 can be easily moved forward smoothly and restored as the trigger portion 81 swings forward.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] Furthermore, in the above embodiment, an example was given in which a folded piece 182 is connected to the inner side wall 166 via an intermediate piece 181, and the locking portion 180 is configured so that a locking piece 183 extends forward from this folded piece 182, but the present invention is not limited to this case. 8, for example, the intermediate piece 181 in the above embodiment may be omitted, and a locking portion 190 may be provided that includes a folded piece 191 folded inward in the left-right direction from the rear end of the pair of inner side walls 166, and a locking piece 192 extending inward in the left-right direction as it moves forward from the folded piece 191. In this case, the thickness of the folded piece 191 in the locking portion 190 is formed thinner than the thickness of the locking piece 183.

[0098] Furthermore, rearward-facing locking surfaces 153 are formed at intervals in the front-rear direction on the connecting portion 150. Therefore, two stages of locking surfaces 153 are formed at intervals in the front-rear direction on the connecting portion 150. The locking piece 183 has two locking protrusions 195 that lock onto the two stages of locking surfaces 153 from the rear, respectively.

[0099] With this configuration, the locking piece 192 can be more easily displaced inward in the left-right direction, starting from the connection point with the thin-walled folded piece 191. In addition, the locking piece 192 is locked to the two-stage locking surface 153 via the locking protrusion 195. This allows the locking piece 192 to be locked to the locking surface 153 more reliably, making it even more difficult for the trigger portion 81 to come off the main piston 83.

[0100] Furthermore, a reinforcing wall 196 extending further rearward is formed at the connecting portion between the rear end portions of the pair of inner side walls 166 and the folded-back piece 191. This makes it possible to more stably support the base portion of the locking portion 190 and suppress rattle or the like of the locking portion 190 in the left-right direction. Therefore, the locking portion 190 can more appropriately perform its function.

[0101] 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 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 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 portion that extends forward from a front end portion of the piston body, the main piston moving 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 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 pair of pressure receiving surfaces, each facing forward, provided at a front end of the piston body so as to be aligned in the left-right direction with the connecting portion therebetween; a rearward-facing locking surface provided between the front end surface of the connecting portion and the front end portion of the piston body, The trigger portion is a pressing piece that protrudes rearward and is in slidable contact with the pressed surface from the front; a locking portion that locks onto the locking surface from behind, The locking portion is a support piece disposed inside the pressing piece in the left-right direction; a folded piece folded back from the support piece toward the inside in the left-right direction; a locking piece formed to extend forward from the folded piece and lock onto the locking surface from behind. <2> <1> In the trigger-type liquid ejector described in The locking piece is formed so as to extend inward in the left-right direction as it moves forward from the folded piece. <3> <1> or <2> In the trigger-type liquid ejector described in The folded piece is formed to be thinner than the locking piece. <4> <1> from <3> In the trigger-type liquid ejector described in any one of A locking recess is formed on a side surface of the connecting portion, the locking recess being recessed inward in the left-right direction and opening upward and downward, The front wall surface facing rearward of the inner wall surface defining the locking recess serves as the locking surface, The locking piece is engaged with the locking surface from behind in a state where it is inserted into the locking recess from the outside in the left-right direction. <5> <1> from <4> In the trigger-type liquid ejector described in any one of The locking piece has a convex shape that bulges forward in a side view seen from the left-right direction, The front edge of the locking piece has a top portion that bulges most toward the front, and a pair of inclined edges that are inclined so as to extend rearward as they extend upward and downward from the top portion, When the main piston is positioned at the forwardmost position, the locking piece is locked in a state where one of the pair of inclined edge portions that is located below the apex is in surface contact with the locking surface. [Explanation of symbols]

[0102] 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 142...Pressure surface 150...Connection part 152...Latching recess 153...Latching surface 166…Internal side wall (support piece) 170...Pressing piece 180, 190...Latching part 182, 191...Folded pieces 183, 192...Latching piece 183a...top 183b…Slanted edge

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 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 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 pair of pressure receiving surfaces, each facing forward, provided at a front end of the piston body so as to be aligned in the left-right direction with the connecting portion therebetween; a rearward-facing locking surface provided between the front end surface of the connecting portion and the front end portion of the piston body, The trigger portion is a pressing piece that protrudes rearward and is in slidable contact with the pressed surface from the front; a locking portion that locks onto the locking surface from behind, The locking portion is a support piece disposed inside the pressing piece in the left-right direction; a folded piece folded back from the support piece toward the inside in the left-right direction; a locking piece formed to extend forward from the folded piece and lock onto the locking surface from behind.

2. The trigger-type liquid ejector according to claim 1, The locking piece is formed so as to extend inward in the left-right direction as it moves forward from the folded piece.

3. The trigger-type liquid ejector according to claim 2, The folded piece is formed to be thinner than the locking piece.

4. The trigger-type liquid ejector according to claim 1, A locking recess is formed on a side surface of the connecting portion, the locking recess being recessed inward in the left-right direction and opening upward and downward, The front wall surface facing rearward of the inner wall surface defining the locking recess serves as the locking surface, The locking piece is engaged with the locking surface from behind in a state where it is inserted into the locking recess from the outside in the left-right direction.

5. The trigger-type liquid ejector according to claim 1, The locking piece has a convex shape that bulges forward in a side view seen from the left-right direction, The front edge of the locking piece has a top portion that bulges most toward the front, and a pair of inclined edges that incline so as to extend rearward as they extend upward and downward from the top portion, When the main piston is positioned at the forwardmost position, the locking piece is locked in a state where one of the pair of inclined edge portions that is located below the apex is in surface contact with the locking surface.

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