JP7018866B2 - Triggered liquid ejector - Google Patents

Description

The present invention relates to a trigger type liquid ejector.

As a trigger type liquid ejector, for example, the configuration as described in Patent Document 1 below is known. The trigger type liquid ejector includes an ejector body mounted on a container body containing a liquid, and a nozzle portion arranged in front of the ejector body and having a ejection hole for ejecting the liquid. ..
The ejector main body is arranged in front of the vertical supply cylinder portion that sucks up the liquid in the container and the vertical supply cylinder portion, and guides the liquid in the vertical supply cylinder portion to the ejection hole, and the front of the vertical supply cylinder portion. It is provided with a trigger mechanism having a trigger portion arranged so as to be movable backward in a forward urged state.

The trigger mechanism described above includes a cylinder that communicates with the injection cylinder through the vertical supply cylinder, and a piston that is linked to the trigger and slides in the cylinder in the front-rear direction as the trigger moves back and forth. ..
In the trigger type liquid ejector described above, when the trigger portion is pulled backward, the piston moves backward while being guided by the piston guide formed in the cylinder. As a result, the inside of the cylinder is pressurized, and the liquid in the cylinder is ejected from the ejection hole through the vertical supply cylinder portion and the injection cylinder portion.

In the trigger type liquid ejector described above, for example, when the remaining amount of liquid in the container becomes low, air may be mixed with the liquid in the cylinder. The air mixed in the cylinder is mixed with the liquid in the cylinder by the operation of the trigger portion, so that it tends to remain as bubbles. The presence of air bubbles in the cylinder causes a cause of poor ejection.
Therefore, the above-mentioned trigger type liquid ejector is provided with a collection passage for communicating the inside of the cylinder and the inside of the container through the inside of the piston guide and the vertical supply cylinder portion, for example, when the piston moves to the rearmost end position.

Japanese Unexamined Patent Publication No. 2018-702232

On the other hand, the trigger type liquid ejector as described above has an opening that communicates with the inside of the container for the purpose of taking in outside air into the container when the inside of the cylinder becomes negative pressure and the liquid is sucked up from the inside of the container. The outside air introduction passage may be formed. If the above-mentioned recovery passage is simply provided for the trigger type liquid ejector in which such an outside air introduction passage is formed, the liquid collected in the container body from the recovery passage passes through the opening communicating with the inside of the container. There was a risk of entering the outside air introduction passage. Therefore, there is a risk that the liquid may leak into the external space.

In view of the above circumstances, one aspect of the present invention is to provide a trigger type liquid ejector in which a recovery passage and an outside air introduction passage are formed and the liquid in the container can be suppressed from leaking to the external space. Make it one.

One aspect of the trigger type liquid ejector of the present invention is to form an ejector main body mounted on a container body in which a liquid is stored and an ejector hole arranged in front of the ejector main body to eject the liquid. The ejector main body extends in the vertical direction and is arranged in front of the vertical supply cylinder portion and the vertical supply cylinder portion that sucks up the liquid in the container. The trigger portion is connected to an injection cylinder portion that guides the liquid sucked up by the cylinder portion to the nozzle portion, a trigger portion that is arranged in front of the vertical supply cylinder portion so as to be movable backward in a forward urged state, and the trigger portion. It has a cylindrical piston body, a sliding portion connected to the piston body, a piston that moves back and forth with the back and forth movement of the trigger portion, and a piston guide inserted into the piston body, and has front and rear of the piston. The vertical supply cylinder portion includes a cylinder that is pressurized and depressurized by sliding the sliding portion with movement, and the vertical supply cylinder portion has an outer cylinder portion that extends in the vertical direction and opens downward, and the outer cylinder portion. An inner cylinder portion located inside the inner cylinder portion in the radial direction, a mounting cylinder portion that surrounds the inner cylinder portion radially outside the inner cylinder portion and communicates with the inside of the container body, and the inner cylinder portion. A first connecting wall portion that extends radially outward from the outer peripheral surface of the above and connects the inner cylinder portion and the mounting cylinder portion, and the connecting wall portion has a first structure that penetrates the connecting wall portion in the vertical direction. A through hole and a second through hole are formed, and a recovery gap extending in the vertical direction and opening downward is formed between the inner peripheral surface of the outer cylinder portion and the outer peripheral surface of the inner cylinder portion. The lower end of the outer cylinder portion facing the inner cylinder portion via the recovery gap is fitted in the through hole, and the ejector main body is between the piston main body and the piston guide. A recovery passage that communicates the inside of the cylinder and the inside of the mounting cylinder through the recovery gap and the first through hole, and an outside air introduction passage that communicates the outside space and the inside of the mounting cylinder through the second through hole. The first through hole has a first opening constituting the opening of the recovery passage that opens in the mounting cylinder portion, and the second through hole opens in the mounting cylinder portion. It has a second opening constituting the opening of the outside air introduction passage, and the second opening is arranged apart from the first opening in a direction orthogonal to the vertical direction. ..

According to one aspect of the trigger type liquid ejector of the present invention, the first opening of the first through hole constitutes the opening of the recovery passage that opens in the mounting cylinder portion, and the second opening of the second through hole. The portion constitutes an opening of an outside air introduction passage that opens in the mounting cylinder portion. The second opening is arranged apart from the first opening in a direction orthogonal to the vertical direction. Therefore, as described above, it is possible to prevent the liquid that has flowed into the mounting cylinder from the first opening through the recovery passage from flowing into the second opening without being discharged into the container. As a result, it is possible to prevent the liquid from flowing back through the outside air introduction passage, and it is possible to prevent the liquid from leaking into the external space. Further, since it is possible to prevent the liquid from leaking to the external space, a stable discharge amount can be obtained.

The second opening may be arranged at different positions in the vertical direction with respect to the first opening.
According to this configuration, it is possible to further suppress the movement of the liquid flowing into the mounting cylinder portion from the first opening portion to the second opening portion.

An upside-down adapter disposed below the vertical supply cylinder portion is further provided, and the upside-down adapter is a first space for communicating the inside of the container and the inside of the vertical supply cylinder portion through an upright introduction port, and a first space. The adapter body that defines a second space that communicates the inside of the container with the first space through the inverted introduction port, and the first unit when the container body is upright with the ejector body attached to the container body. A switching valve that cuts off the communication between the one space and the second space and communicates the first space and the second space when the container body is inverted is provided, and the outer peripheral surface of the upside-down adapter and the above. A communication passage for communicating the collection passage and the inside of the container is formed between the inner peripheral surface of the mounting cylinder portion, and the adapter main body is a facing wall located distantly below the connecting wall portion. The vertical supply cylinder portion includes a portion and a tubular portion that protrudes upward from the facing wall portion, the vertical supply cylinder portion includes a protrusion portion that protrudes downward from the connecting wall portion, and the second through hole has the protrusion. The portion may be penetrated in the vertical direction, the second opening may be opened to the lower end surface of the protrusion, and the protrusion may be inserted into the tubular portion from above.

According to this configuration, even when the liquid discharged from the first opening into the mounting cylinder portion goes toward the second opening, the liquid can be blocked by the tubular portion. Further, since the second opening is open to the lower end surface of the protruding portion, the upper end opening and the second opening of the tubular portion can be preferably arranged apart from each other. This makes it difficult for the liquid to reach the second opening even when the liquid has entered the tubular portion from the upper end opening of the tubular portion. As described above, the liquid discharged from the first opening can be further suppressed from flowing into the second opening, and the liquid can be further suppressed from leaking into the external space of the discharge container.

The nozzle portion is arranged in the accumulator chamber for communicating the inside of the injection cylinder portion and the ejection hole, the nozzle body in which the ejection hole is formed, and the accumulator chamber so as to be movable rearward in a forward urged state. A pressure accumulator valve for blocking communication between the inside of the injection cylinder and the ejection hole is provided, and the accumulator valve moves rearward when the internal pressure of the accumulator chamber exceeds a predetermined value, and moves to the inside of the injection cylinder and the above. It may be configured to communicate with the ejection hole.
According to this configuration, it is possible to secure the ejection pressure of the liquid ejected from the ejection hole.

According to one aspect of the present invention, there is provided a trigger type liquid ejector in which a recovery passage and an outside air introduction passage are formed and the liquid in the container can be suppressed from leaking to the external space.

FIG. 1 is a cross-sectional view showing a trigger type ejector according to the first embodiment. FIG. 2 is a cross-sectional view showing a part of the trigger type ejector of the first embodiment. FIG. 3 is a view of the vertical supply cylinder portion of the first embodiment as viewed from below. FIG. 4 is a view of the first mounting member of the first embodiment as viewed from above. FIG. 5 is a cross-sectional view showing a part of the trigger type ejector of the first embodiment, and is a cross-sectional view taken along the line VV in FIG. FIG. 6 is a cross-sectional view showing a part of the trigger type ejector of the second embodiment.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the following description, the ejection container configured by attaching the trigger type liquid ejector according to the present invention to the container body will be described. Further, in each of the following embodiments, the corresponding configurations may be designated by the same reference numerals and description thereof may be omitted. Further, the scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. Further, in the following drawings, the scale and the number of each structure may be different from the scale and the number of the actual structure in order to make each configuration easy to understand.

<First Embodiment>
The ejection container 1 shown in FIG. 1 includes a container body 2 in which a liquid is stored, and a trigger type liquid ejector 3 detachably attached to a mouth portion 2a of the container body 2.
As the liquid contained in the container body 2 of the present embodiment, for example, a detergent used in a bathroom, a toilet, or the like, which has a viscosity equivalent to that of water, is preferably used. Such detergents contain, for example, a surfactant and foam. The detergent used for bathrooms, toilets, etc. is, for example, a detergent used for residential bathrooms, toilets, and the like. The liquid contained in the container 2 is not particularly limited and can be changed as appropriate. The liquid contained in the container 2 may be, for example, a dishwashing liquid or the like. Further, the liquid contained in the container body 2 does not have to be a detergent, and may be, for example, a deodorant, a fragrance, or the like used for clothes or the like.

The trigger type liquid ejector 3 includes an ejector main body 10, a nozzle portion 11, and an upside-down adapter 12.
The ejector main body 10 is attached to the container body 2. The ejector main body 10 has a vertical supply cylinder portion 14 that sucks up the liquid in the container body 2, an injection cylinder portion 15 that guides the liquid sucked up by the vertical supply cylinder portion 14 to the nozzle portion 11, and the inside of the vertical supply cylinder portion 14 and A trigger mechanism 16 for circulating a liquid in the injection cylinder portion 15 is provided.

The vertical supply cylinder portion 14 is a tubular portion extending in one direction as a whole. The vertical supply cylinder portion 14 includes an outer cylinder portion 21, an inner cylinder portion 22, a connecting wall portion 45, a mounting cylinder portion 23, and a connecting cylinder portion 24. The outer cylinder portion 21 and the inner cylinder portion 22 have a tubular shape coaxially arranged with the first axis O1 as the center. The mounting cylinder portion 23 and the connecting cylinder portion 24 have a tubular shape coaxially arranged with the second axis O2 as the center. In the present embodiment, the first axis O1 and the second axis O2 are parallel to each other and are arranged apart from each other.

In the following description, the direction along the first axis O1 is referred to as the vertical direction, and is shown in the Z-axis direction in each figure. The vertical direction is one direction in which the vertical supply cylinder portion 14 extends. In the erecting container 1, the vertical direction from the trigger type liquid ejector 3 toward the container body 2 (-Z direction) is referred to as downward, and the vertical direction from the container body 2 to the trigger type liquid ejector 3 is referred to as downward. The direction toward (+ Z direction) is called upward.

Further, the direction intersecting the first axis O1 in the plan view seen from the vertical direction is called the radial direction. Of the radial directions, one direction is referred to as the front-back direction, and is shown in the Y-axis direction in each figure. The direction in which the injection cylinder portion 15 extends from the vertical supply cylinder portion 14 in the front-rear direction (+ Y direction) is referred to as the front, and the opposite direction (−Y direction) is referred to as the rear. Further, among the radial directions, the direction orthogonal to the front-rear direction is referred to as a left-right direction, and is shown in the X-axis direction in each figure. In the example of the present embodiment, the second axis O2 coincides with the container axis of the container body 2, and the first axis line O1 is eccentric to the rear with respect to the container axis of the second axis O2 and the container body 2. .. The first axis O1 and the container axis may be coaxial.

The outer cylinder portion 21 has a ridged cylinder shape that extends in the vertical direction and opens downward. A discharge port 26 that opens toward the front is formed in the upper part of the peripheral wall portion of the outer cylinder portion 21. A supply port 27 and a discharge port 28 that open toward the front are formed at the central portion in the vertical direction of the peripheral wall portion of the outer cylinder portion 21. The supply port 27 is located above the discharge port 28. The supply port 27 may be located below the discharge port 28. A communication groove 29 that extends in the vertical direction and opens downward is formed on the inner peripheral surface of the outer cylinder portion 21. The upper end of the communication groove 29 communicates with the discharge port 28. The lower end of the communication groove 29 is open at the lower end edge of the outer cylinder portion 21.

The connecting cylinder portion 24 is located outside the outer cylinder portion 21 in the radial direction. The connecting cylinder portion 24 surrounds the lower end portion of the outer cylinder portion 21. In the present embodiment, the connecting cylinder portion 24 has a cylindrical shape centered on the second axis O2. The upper end portion of the connecting cylinder portion 24 is connected to the outer peripheral surface of the outer cylinder portion 21 except for the front portion. The front side portion of the upper end portion of the connecting cylinder portion 24 is connected to the lower end portion on the outer peripheral surface of the cylinder portion 75, which will be described later. The lower end of the connecting cylinder 24 is located below the lower end of the outer cylinder 21. In the present embodiment, the connecting cylinder portion 24 is integrally formed with the outer cylinder portion 21.

The inner cylinder portion 22 is located inside the outer cylinder portion 21 in the radial direction. In the present embodiment, the inner cylinder portion 22 is fitted into the outer cylinder portion 21 from below the outer cylinder portion 21. Since the communication groove 29 is formed in the outer cylinder portion 21 as described above, between the portion of the inner peripheral surface of the outer cylinder portion 21 in which the communication groove 29 is formed and the outer peripheral surface of the inner cylinder portion 22. Is formed with a recovery gap G extending in the vertical direction and opening downward. The collection gap G is open inside the mounting cylinder portion 23. The inner cylinder portion 22 is arranged coaxially with the outer cylinder portion 21. The lower end of the inner cylinder portion 22 projects downward from the outer cylinder portion 21. The upper portion of the inner cylinder portion 22 constitutes a small diameter portion 34 having a smaller outer diameter than the lower portion. A connecting passage S1 is formed between the inner peripheral surface of the inner cylinder portion 22 and the outer peripheral surface of the small diameter portion 34. The connecting passage S1 extends in the vertical direction and connects the discharge port 26 and the supply port 27. The upper end edge of the small diameter portion 34 is close to or in contact with the top wall portion of the outer cylinder portion 21 from below the outer cylinder portion 21.

A valve seat portion 35 is provided so as to project inward in the radial direction of the small diameter portion 34. The valve seat portion 35 is formed in a tapered tubular shape extending downward toward the inside in the radial direction. In the inner cylinder portion 22, the space surrounded by the small diameter portion 34, the valve seat portion 35, and the top wall portion of the outer cylinder portion 21 defines the accommodation space 40 in which the ball valve 41 is accommodated. The ball valve 41 is configured to be detachable from the valve seat portion 35 by the pressure in the accommodation space 40 and its own weight.

The ball valve 41 of the present embodiment has a higher specific gravity than the liquid contained in the container body 2, and is formed of a material that can be seated on the valve seat portion 35 by its own weight when the ejection container 1 is in an upright posture. There is. As such a material, a metal material (for example, SUS) is preferably used for the ball valve 41 of the present embodiment. If the above conditions are satisfied, the ball valve 41 may be made of a material other than a metal material (for example, glass or the like).

The accommodation space 40 communicates with the above-mentioned communication passage S1 through a notch 42 formed in the upper end edge of the small diameter portion 34. When the ball valve 41 is seated on the valve seat portion 35, the accommodation space 40 is blocked from the portion inside the inner cylinder portion 22 located below the accommodation space 40. As a result, the communication between the inside of the inner cylinder portion 22 and the communication passage S1 is cut off. The accommodation space 40 communicates with a portion of the inside of the inner cylinder portion 22 located below the accommodation space 40 in a state where the ball valve 41 is separated from the valve seat portion 35. As a result, the inside of the inner cylinder portion 22 and the communication passage S1 are communicated with each other via the accommodation space 40.

As shown in FIG. 2, the mounting cylinder portion 23 has a tubular shape that opens on both sides in the vertical direction. The mounting cylinder portion 23 is located outside the outer cylinder portion 21 and the inner cylinder portion 22 in the radial direction. The mounting cylinder portion 23 surrounds a portion of the inner cylinder portion 22 that protrudes downward from the outer cylinder portion 21 and a lower end portion of the outer cylinder portion 21. As shown in FIG. 3, in the present embodiment, the mounting cylinder portion 23 has a cylindrical shape centered on the second axis O2. As shown in FIG. 2, the mounting cylinder portion 23 is fitted inside the connecting cylinder portion 24. In the present embodiment, the mounting cylinder portion 23 and the connecting cylinder portion 24 are fixed by undercut fitting. The lower end of the mounting cylinder 23 is located below the lower end of the inner cylinder 22. The mounting cylinder portion 23 is formed with an outer flange portion 51 that projects outward in the radial direction. The outer flange portion 51 is arranged so as to face the lower side of the connecting cylinder portion 24. The outer flange portion 51 is located above the mouth portion 2a of the container body 2. The outer flange portion 51 is in contact with the mouth portion 2a via the sealing member.

As shown in FIGS. 2 and 3, the connecting wall portion 45 extends radially outward from the outer peripheral surface of the inner cylinder portion 22. The radial outer peripheral edge portion of the connecting wall portion 45 is connected to the inner peripheral surface of the mounting cylinder portion 23. As a result, the connecting wall portion 45 connects the inner cylinder portion 22 and the mounting cylinder portion 23. In the present embodiment, the inner cylinder portion 22, the mounting cylinder portion 23, and the connecting wall portion 45 are integrally formed. As shown in FIG. 2, in the present embodiment, the connecting wall portion 45 is located above the lower end portion of the inner cylinder portion 22 and below the upper end portion of the mounting cylinder portion 23. The connecting wall portion 45 is arranged separately below the cylinder portion 75, which will be described later. An intermediate space S6 is defined between the connecting wall portion 45 and the cylinder portion 75. As shown in FIG. 3, the outer shape of the connecting wall portion 45 is, for example, a circular shape arranged coaxially with the second axis O2 when viewed from the vertical direction.

As shown in FIGS. 2 and 3, the connecting wall portion 45 has a wall portion main body 45a that expands in the radial direction and connects the inner cylinder portion 22 and the mounting cylinder portion 23, and a raised portion that protrudes downward from the wall portion main body 45a. 45b and.
As shown in FIG. 3, the raised portion 46b is an annular shape surrounding the inner cylinder portion 22, and the inner peripheral edge portion is connected to the outer peripheral surface of the inner cylinder portion 22. As shown in FIGS. 2 and 3, a recess 46 that is recessed upward is formed in a portion of the raised portion 45b located on the front side. The recess 46 extends from the outer peripheral edge of the raised portion 45b to the outer peripheral surface of the inner cylinder portion 22. As shown in FIG. 2, the top surface 46a of the recess 46 is located below the lower surface 45c of the wall body 45a. The top surface 46a is a surface of the inner surface of the recess 46 that faces downward.

As shown in FIG. 3, a plurality of ribs 47 are formed on the lower surface 45c of the wall body 45a. The plurality of ribs 47 extend radially to connect the radial outer peripheral edge portion of the raised portion 45b and the inner peripheral surface of the mounting cylinder portion 23. The plurality of ribs 47 are arranged so as to be spaced apart from each other along the circumferential direction around the first axis O1. In this embodiment, for example, three ribs 47 are provided. One of the three ribs 47 extends in the front-rear direction and connects the radial outer peripheral edge portion of the raised portion 45b where the recess 46 is formed to the inner peripheral surface of the mounting cylinder portion 23. .. As shown in FIG. 2, the lower surface of the rib 47 is arranged at the same position in the vertical direction as, for example, the top surface 46a of the recess 46.

The connecting wall portion 45 is formed with a first through hole 48 and a second through hole 49 that penetrate the connecting wall portion 45 in the vertical direction.
The first through hole 48 penetrates the portion of the connecting wall portion 45 provided with the raised portion 45b in the vertical direction. The first through hole 48 penetrates the wall main body 45a and the raised portion 45b in the vertical direction. In the present embodiment, the first through hole 48 penetrates the portion of the raised portion 45b provided with the recess 46 in the radial direction toward the inside in the vertical direction.

As shown in FIG. 3, the first through hole 48 has an arc shape extending in the circumferential direction about the first axis O1 when viewed from the vertical direction. As shown in FIG. 2, the lower end portion of the outer cylinder portion 21 in the portion facing the inner cylinder portion 22 via the recovery gap G is fitted into the first through hole 48 from above. In the present embodiment, the portion of the outer cylinder portion 21 facing the inner cylinder portion 22 via the recovery gap G is a portion in which the communication groove 29 is formed. The outer peripheral surface of the outer cylinder portion 21 is in contact with the radial outer surface of the first through hole 48.
The first through hole 48 has a first opening 48a that opens in the mounting cylinder portion 23. The first opening 48a is the lower end of the first through hole 48. In the present embodiment, the first opening 48a is provided in a portion of the top surface 46a of the recess 46 that is closer to the inside in the radial direction.

The second through hole 49 penetrates in the vertical direction through a portion of the connecting wall portion 45 located outside the raised portion 45b in the radial direction. The second through hole 49 penetrates the wall body 45a in the vertical direction. As shown in FIG. 3, the second through hole 49 is located in front of the first through hole 48 and is arranged at a position different from the first through hole 48 in the left-right direction (X-axis direction). Has been done. The second through hole 49 has, for example, a circular shape when viewed from the vertical direction. The second through hole 49 is located between adjacent ribs 47 in the circumferential direction around the first axis O1.

As shown in FIG. 2, the second through hole 49 has a second opening 49a that opens in the mounting cylinder portion 23. The second opening 49a is the lower end of the second through hole 49. In the present embodiment, the second opening 49a is open to the lower surface 45c of the wall body 45a. The second opening 49a is arranged apart from the first opening 48a in a direction orthogonal to the vertical direction. As shown in FIG. 3, in the present embodiment, the second opening 49a is located in front of the first opening 48a and is located in the left-right direction (Y-axis direction) with respect to the first opening 48a. They are located in different positions. As shown in FIG. 2, the second opening 49a is arranged at different positions in the vertical direction with respect to the first opening 48a of the first through hole 48. In the present embodiment, the second opening 49a is located above the first opening 48a.

As shown in FIG. 1, the injection cylinder portion 15 is arranged in front of the vertical supply cylinder portion 14. The injection cylinder portion 15 projects forward from the upper end portion of the outer cylinder portion 21. In the present embodiment, the injection cylinder portion 15 is integrally formed with the outer cylinder portion 21. The inside of the injection cylinder portion 15 communicates with the above-mentioned communication passage S1 through the discharge port 26. The injection cylinder portion 15 has a front end opening portion 15a that opens forward.
A cylinder portion 75 is formed below the injection cylinder portion 15. The cylinder portion 75 is integrally formed with the outer cylinder portion 21, the connecting cylinder portion 24, and the injection cylinder portion 15. The cylinder portion 75 is opened toward the front, and the rear end opening is closed by the outer cylinder portion 21. An outside air communication hole 82 is formed in a portion of the lower wall portion of the cylinder portion 75 located behind the portion to which the connecting cylinder portion 24 is connected. The outside air communication hole 82 communicates the inside of the cylinder portion 75 with the inside of the connecting cylinder portion 24. The outside air communication hole 82 opens in the intermediate space S6.

The trigger mechanism 16 includes a pump portion 61 having a cylinder 71 and a piston 72, a cover body 62, a trigger portion 63, and an elastic plate portion 64.
The cylinder 71 is formed in a bottomed cylinder shape that opens forward. In the following description, the central axis of the cylinder 71 will be the cylinder axis O3. The cylinder shaft O3 extends in the front-rear direction. The cylinder 71 includes a storage cylinder 77 and a piston guide 78 that extend coaxially with the cylinder shaft O3, and a bottom wall portion 79 that connects the rear end edges of the storage cylinder 77 and the piston guide 78 to each other.

The accommodating cylinder 77 is fitted in a cylinder portion 75 formed below the injection cylinder portion 15. The storage cylinder 77 is formed with an outside air introduction hole 80 for introducing outside air into the container body 2 as the liquid flows into the cylinder 71. Both ends of the accommodating cylinder 77 in the front-rear direction are in close contact with the inner peripheral surface of the cylinder portion 75. On the other hand, an annular gap P1 is formed in the central portion in the front-rear direction between the outer peripheral surface of the accommodating cylinder 77 and the inner peripheral surface of the cylinder portion 75. The gap P1 communicates with the inside of the cylinder 71 through the outside air introduction hole 80. As shown in FIG. 2, the gap P1 communicates with the second through hole 49 through the outside air communication hole 82 formed in the cylinder portion 75 for the cylinder and the intermediate space S6.

The bottom wall portion 79 is an annular shape centered on the cylinder shaft O3. The outer peripheral edge of the bottom wall portion 79 is connected to the rear end portion of the accommodating cylinder 77. The inner peripheral edge of the bottom wall portion 79 is connected to the rear end portion of the piston guide 78. The bottom wall portion 79 is formed with a fitting portion 79a that projects rearward. The fitting portion 79a is fitted to the supply port 27. The fitting portion 79a is formed with a communication port 81 that penetrates the fitting portion 79a in the front-rear direction. The communication port 81 communicates the inside of the cylinder 71 with the communication passage S1.

The piston guide 78 projects forward from the inner peripheral edge of the bottom wall portion 79. The piston guide 78 is formed in a ridged cylinder shape that opens toward the rear. The inside of the piston guide 78 communicates with the above-mentioned discharge port 28. A through hole 83 that penetrates the top wall portion in the front-rear direction is formed in the top wall portion of the piston guide 78. A recessed portion 84 that is recessed inward in the radial direction of the cylinder shaft O3 is formed on the outer peripheral surface of the rear end portion of the piston guide 78. The recessed portion 84 is formed over the entire circumference of the piston guide 78. The recessed portion 84 may be formed intermittently.

As shown in FIG. 1, the piston 72 is housed in the housing cylinder 77 so as to be movable back and forth. The piston 72 includes a piston main body 91, and an inner sliding portion 92 and an outer sliding portion 93 as sliding portions connected to the piston main body 91.
The piston body 91 is formed in a ridged cylinder shape that opens toward the rear. The piston body 91 has a cylindrical shape arranged coaxially with the cylinder shaft O3. The piston guide 78 described above is inserted inside the piston body 91.

The inner sliding portion 92 extends rearward from the rear end opening edge of the piston body 91. The rear end portion of the inner sliding portion 92 is configured to be slidable on the outer peripheral surface of the piston guide 78 as the piston 72 moves back and forth. When the piston 72 reaches the rearmost end position, the rear end portion of the inner sliding portion 92 is at a position where the outer peripheral surface of the piston guide 78 faces the recessed portion 84. Therefore, the rear end portion of the inner sliding portion 92 is separated from the outer peripheral surface of the piston guide 78 when the piston 72 reaches the rearmost end position. As a result, the inside of the piston body 91 and the inside of the cylinder 71 communicate with each other through the inner sliding portion 92 and the recessed portion 84.

The outer sliding portion 93 is connected to the lower end portion of the piston main body 91. The outer sliding portion 93 surrounds the periphery of the piston main body 91. The outer sliding portion 93 is formed in a tapered tubular shape whose diameter is gradually increased from the central portion in the front-rear direction toward the front and the rear. The front and rear ends of the outer sliding portion 93 are configured to be slidable on the inner peripheral surface of the accommodating cylinder 77 as the piston 72 moves back and forth. The outer sliding portion 93 closes the above-mentioned outside air introduction hole 80 when the piston 72 is in the frontmost position. On the other hand, the outer sliding portion 93 opens the outside air introduction hole 80 by moving the piston 72 backward.
The inside of the cylinder 71 is pressurized and depressurized by sliding the inner sliding portion 92 and the outer sliding portion 93 as sliding portions as the piston 72 moves back and forth. As the piston 72 moves rearward, the inside of the cylinder 71 is pressurized. As the piston 72 moves forward, the inside of the cylinder 71 is depressurized.

The cover body 62 covers the vertical supply cylinder portion 14 and the injection cylinder portion 15 from both sides in the upper, rear, and left-right directions.
The trigger portion 63 is arranged in front of the vertical supply cylinder portion 14. The trigger portion 63 extends downward while being curved toward the front. The upper end portion of the trigger portion 63 is rotatably connected to the injection cylinder portion 15 around the axis C1 extending in the left-right direction. The trigger portion 63 moves back and forth by rotating around the axis C1. The central portion of the trigger portion 63 in the vertical direction is connected to the front end portion of the piston body 91 so as to be rotatable around the axis C2 extending in the horizontal direction and movable in the vertical direction. The piston 72 moves back and forth with respect to the cylinder 71 as the trigger portion 63 rotates around the axis C1, that is, moves back and forth.
The elastic plate portion 64 is interposed between the injection cylinder portion 15 and the trigger portion 63. The elastic plate portion 64 urges the trigger portion 63 toward the front around the axis C1. As a result, the trigger portion 63 is arranged so as to be movable backward in the forward urging state.

In the present specification, "the trigger portion and the piston move back and forth" means that the trigger portion and the piston may move so that the positions in the front-rear direction change, and the trigger portion and the piston move diagonally with respect to the front-back direction. Including tilting and moving. For example, the trigger portion and the piston may move back and forth from diagonally upper front to diagonally lower rear. Further, for example, the trigger portion and the piston may move back and forth from diagonally lower front to diagonally upper rear.

The ejector main body 10 further includes a mounting cap 52 for attaching the trigger type liquid ejector 3 to the container body 2. The mounting cap 52 is formed in a cylindrical shape extending in the vertical direction. In the present embodiment, the mounting cap 52 has a cylindrical shape arranged coaxially with the second axis O2. The mounting cap 52 is mounted on the mouth portion 2a in a state where the outer flange portion 51 formed on the mounting cylinder portion 23 is sandwiched between the outer flange portion 51 and the upper end edge of the mouth portion 2a. In the present embodiment, the mounting cap 52 is screwed to, for example, the mouth portion 2a.

As shown in FIG. 2, the ejector main body 10 communicates the inside of the cylinder 71 and the inside of the mounting cylinder 23 through the recovery gap G and the first through hole 48 between the piston main body 91 and the piston guide 78. The passage S2 is formed. In the present embodiment, the recovery passage S2 is composed of a through hole 83 of the piston guide 78, a inside of the piston guide 78, a discharge port 28, a recovery gap G (communication groove 29), and a flow path leading to the first through hole 48. The recovery passage S2 is a passage for returning air bubbles or the like remaining in the cylinder 71 to the inside of the container body 2. The recovery passage S2 communicates with the mounting cylinder portion 23 and the intermediate space S3 defined in the first mounting member 140 described later through the first through hole 48. The first opening 48a of the first through hole 48 is the lower end portion of the recovery passage S2, and constitutes the opening of the recovery passage S2 that opens in the mounting cylinder portion 23.

Further, the ejector main body 10 is formed with an outside air introduction passage S5 that communicates the inside of the mounting cylinder portion 23 with the external space of the ejector container 1 through the second through hole 49. In the present embodiment, the outside air introduction passage S5 includes an outside air introduction hole 80 formed in the accommodating cylinder 77, a gap P1 between the accommodating cylinder 77 and the cylinder portion 75, and an outside air communication hole 82 formed in the cylinder portion 75. It is composed of a flow path leading to the intermediate space S6 and the second through hole 49. In the outside air introduction passage S5, the piston body 91 moves rearward and the outside air introduction hole 80 is opened, so that the inside of the mounting cylinder portion 23 and the outside space of the ejection container 1 communicate with each other. The second opening 49a of the second through hole 49 is the lower end portion of the outside air introduction passage S5, and constitutes the opening of the outside air introduction passage S5 that opens in the mounting cylinder portion 23.

As shown in FIG. 1, the nozzle portion 11 is arranged in front of the ejector main body 10. More specifically, the nozzle portion 11 projects forward from the injection cylinder portion 15. The nozzle portion 11 is formed with an ejection hole 112a for ejecting a liquid. The nozzle portion 11 includes a connecting member 100, a nozzle main body 101, a pressure accumulator valve 102, and a foam forming cylinder 133.
The connecting member 100 is formed in a ridged cylinder shape that opens rearward. The front end portion of the injection cylinder portion 15 is fitted in the peripheral wall portion of the connecting member 100. A communication hole 105 that penetrates the front wall portion in the front-rear direction is formed in the front wall portion of the connecting member 100. The communication hole 105 communicates with the inside of the injection cylinder portion 15 through the front end opening portion 15a of the injection cylinder portion 15. A cylindrical mounting cylinder 110 extending forward is formed on the front wall portion of the connecting member 100. The axis of the mounting tube 110 is eccentric downward with respect to the axis of the injection tube portion 15.

The nozzle body 101 is formed in a ridged cylinder shape that opens rearward. The mounting cylinder 110 described above is fitted in the peripheral wall portion of the nozzle body 101. The space defined between the connecting member 100 and the nozzle body 101 constitutes the accumulator chamber 115. The accumulator chamber 115 communicates the inside of the injection cylinder portion 15 with the ejection hole 112a. The nozzle body 101 protrudes forward from the nozzle cylinder portion 101a, the valve seat plate 101b having the valve seat portion 121 arranged inside the nozzle cylinder portion 101a and on which the accumulator valve 102 is seated, and the valve seat plate 101b. The cap mounting cylinder portion 101c, the nozzle tip 112 assembled in the cap mounting cylinder portion 101c, and the covering cylinder portion 101d that protrudes forward from the valve seat plate 101b and surrounds the cap mounting cylinder portion 101c from the outside in the nozzle radial direction. I have. The nozzle tip 112 is formed with a ejection hole 112a.

The accumulator valve 102 is housed in the accumulator chamber 115 described above so as to be movable backward in a state of being urged forward by the coil spring 120. The pressure accumulator valve 102 is seated on the valve seat portion 121 formed on the valve seat plate 101b of the nozzle body 101, and closes the ejection hole 112a. As a result, the accumulator valve 102 cuts off communication between the inside of the injection cylinder portion 15 and the ejection hole 112a. A small-diameter piston portion 102a is formed in the latter half of the accumulator valve 102, and a large-diameter piston portion 102b is formed in the front half of the accumulator valve 102. The pressure accumulator valve 102 exerts the pressure of the liquid introduced into the accumulator chamber 115 through the communication hole 105 on the small diameter piston portion 102a and the large diameter piston portion 102b. When this pressure exceeds a certain level, the accumulator valve 102 retracts due to the difference in the pressure receiving area between the small diameter piston portion 102a and the large diameter piston portion 102b, and the ejection hole 112a is opened. As a result, the inside of the injection cylinder portion 15 and the ejection hole 112a are communicated with each other via the accumulator chamber 115. In this way, when the internal pressure of the accumulator chamber 115 exceeds a predetermined value, the accumulator valve 102 moves rearward to communicate the inside of the injection cylinder portion 15 and the ejection hole 112a.

The foam forming cylinder 133 is located in front of the valve seat plate 101b. The foam forming cylinder 133 is externally fitted to the cap mounting cylinder portion 101c. The outer diameter of the foam-forming cylinder 133 is smaller than the inner diameter of the coated cylinder portion 101d, and an annular space is provided between the outer peripheral surface of the foam-forming cylinder 133 and the inner peripheral surface of the coated cylinder portion 101d. The foam cylinder 133 is formed with an outside air introduction hole 137 for introducing outside air inside. The outside air introduction hole 137 penetrates the foam forming cylinder 133 in the nozzle radial direction. The outside air introduction hole 137 is located on the front side of the cap mounting cylinder portion 101c. A plurality of outside air introduction holes 137 are arranged in the foam forming cylinder 133 at intervals over the entire circumference.

The trigger type liquid ejector 3 of the present embodiment includes a lid portion 130 as a blocking means for blocking communication between the outside and the inside of the nozzle portion 11 through the ejection hole 112a. The lid portion 130 is arranged in the nozzle portion 11 and closes the ejection hole 112a so as to be openable and closable from the front. The upper end portion of the lid portion 130 is rotatably attached to the covering cylinder portion 101d of the nozzle body 101 around an axis extending in the left-right direction. The blocking means is not limited to the lid 130, and for example, by rotating the nozzle body 101 relative to the connecting member 100, communication between the outside and the inside of the nozzle body 101 through the ejection hole 112a is blocked. The configuration may be different.

The upside-down adapter 12 is arranged below the vertical supply cylinder portion 14. The upside-down adapter 12 is attached to the lower end of the vertical supply cylinder portion 14. In the upside-down adapter 12, the ejection container 1 is inside the container body 2 in either an upright posture (a posture in which the mouth portion 2a faces upward) or an inverted posture (a posture in which the mouth portion 2a faces downward). It is possible to inject the liquid of.

The upside-down adapter 12 includes a first mounting member 140 and a second mounting member 141 assembled in the vertical direction, and a partition member 142 for partitioning between the first mounting member 140 and the second mounting member 141. The adapter main body 12a of the present embodiment is configured by the first mounting member 140, the second mounting member 141, and the partition member 142.
The first mounting member 140 is mounted in the mounting cylinder portion 23. As shown in FIG. 2, the first mounting member 140 includes a fitting cylinder portion 145, an facing wall portion 146, a protrusion portion 144, and a first mounting member main body 147.

The fitting cylinder portion 145 has a cylindrical shape arranged coaxially with the first axis line O1. The fitting cylinder portion 145 is open on both sides in the vertical direction. The upper portion of the fitting cylinder portion 145 is fitted in the inner cylinder portion 22. The lower end portion of the fitting cylinder portion 145 is located below the lower end portion of the inner cylinder portion 22.
The facing wall portion 146 extends radially outward from the outer peripheral surface of the fitting cylinder portion 145. In the present embodiment, the facing wall portion 146 is located above the lower end portion of the fitting cylinder portion 145. The facing wall portion 146 has a plate shape in which the plate surface faces in the vertical direction. The facing wall portion 146 is located at a distance below the connecting wall portion 45. The intermediate space S3 is defined by the facing wall portion 146, the connecting wall portion 45, and the mounting cylinder portion 23.
The protrusion 144 projects upward from the facing wall portion 146. As shown in FIG. 4, the protrusion 144 extends in the left-right direction.

As shown in FIG. 2, the first mounting member main body 147 has a cylindrical shape extending downward from the radial outer peripheral edge portion of the facing wall portion 146. The first mounting member main body 147 has a cylindrical shape arranged coaxially with the second axis O2. The lower portion of the first mounting member main body 147 has a larger outer diameter and inner diameter than the upper portion of the first mounting member main body 147. On the outer peripheral surface of the first mounting member main body 147, a step portion 147a whose outer diameter increases while going from the upper side to the lower side is provided. The upper portion of the first mounting member main body 147 is fitted into the mounting cylinder portion 23 from below the mounting cylinder portion 23. The outer peripheral surface of the upper portion of the first mounting member main body 147 is in contact with the inner peripheral surface of the mounting cylinder portion 23. The upper end portion of the lower portion of the first mounting member main body 147, that is, the step portion 147a described above, is in close proximity to or in contact with the lower end edge of the mounting cylinder portion 23 from below the mounting cylinder portion 23. An inverted introduction port 153 that penetrates the first mounting member main body 147 in the radial direction is formed in a portion of the lower portion of the first mounting member main body 147 located in front of the second axis O2.

As shown in FIGS. 4 and 5, the first mounting member 140 is formed with a recess 143 that is recessed inward in the radial direction about the second axis O2. In the present embodiment, the recesses 143 are formed in pairs with the second axis O2 sandwiched in the left-right direction (X-axis direction). The recess 143 is formed so as to straddle the first mounting member main body 147 and the facing wall portion 146, and is open upward. The lower end of the recess 143 is located below the step 147a.

As shown in FIG. 5, the connecting passage S4 is formed by being surrounded by the inner side surface of the recess 143 and the inner peripheral surface of the mounting cylinder portion 23. That is, a continuous passage S4 is formed between the outer peripheral surface of the upside-down adapter 12 and the inner peripheral surface of the mounting cylinder portion 23. The communication passage S4 is connected to the intermediate space S3 and the inside of the container body 2, and communicates the inside of the mounting cylinder portion 23 and the inside of the container body 2. That is, in the present embodiment, the inside of the mounting cylinder portion 23 communicates with the inside of the container body 2 via the communication passage S4. As a result, the communication passage S4 communicates between the recovery passage S2 and the inside of the container body 2.

In the present embodiment, the minimum value of the flow path cross-sectional area (cross-sectional area orthogonal to the opening direction) of the communication passage S4 is larger than the minimum value of the flow path cross-sectional area of the recovery passage S2. The minimum value of the flow path cross-sectional area of the recovery passage S2 is the opening of each of the through hole 83 of the piston guide 78, the inside of the piston guide 78, the discharge port 28, the recovery gap G (communication groove 29), and the first through hole 48. It is the minimum value among the cross-sectional areas orthogonal to the direction. In the present embodiment, the minimum value of the flow path cross-sectional area of the communication passage S4 is set to be larger than the size of the bubbles generated in the cylinder 71.

As shown in FIG. 2, the partition member 142 includes a first communication cylinder portion 160 and a second communication cylinder portion 161.
The first communication tube portion 160 has a cylindrical shape arranged coaxially with the first axis O1. The first communication tube portion 160 is open on both sides in the vertical direction. A portion of the fitting cylinder portion 145 that protrudes below the facing wall portion 146 is fitted into the first communication cylinder portion 160 from above the first communication cylinder portion 160.

The second communication cylinder portion 161 is connected to the front at the lower end portion of the first communication cylinder portion 160. The second communication cylinder portion 161 has a tubular shape that opens on both sides in the vertical direction. The second communication tube portion 161 is located in front of the second axis O2. The diameter of the second communication tube portion 161 is gradually reduced toward the bottom. In the present embodiment, the space defined between the second communication cylinder portion 161 and the first mounting member 140 constitutes the valve chamber 165. The valve chamber 165 communicates with the inside of the container body 2 through the above-mentioned inverted introduction port 153. The valve chamber 165 accommodates a ball valve 164 as a switching valve. The ball valve 164 opens and closes the lower end opening of the second communication cylinder portion 161 by contacting and separating the ball valve 164 from the lower end opening edge of the second communication cylinder portion 161. The inside of the second communication cylinder portion 161 communicates with the inside of the container body 2 through the inverted introduction port 153.

The second mounting member 141 includes a closing portion 170 and a fixed cylinder portion 171.
The closed portion 170 is formed in the shape of a bottomed cylinder that opens upward. The closing portion 170 is fitted in the first mounting member main body 147 with the partition member 142 sandwiched between them. The closing portion 170 and the first mounting member main body 147 are undercut fitted.
The fixed cylinder portion 171 penetrates the bottom wall portion of the closing portion 170 in the vertical direction at the rear portion of the closing portion 170. The fixed cylinder portion 171 has a cylindrical shape arranged coaxially with the first axis line O1. The fixed cylinder portion 171 is open on both sides in the vertical direction. A suction pipe 175 is fitted in the lower portion of the fixed cylinder portion 171. The upper end opening of the fixed cylinder portion 171 is an upright introduction port 171a. The upright introduction port 171a communicates with the inside of the first communication cylinder portion 160 described above. Therefore, the inside of the first communication cylinder portion 160 communicates with the inside of the container body 2 through the inside of the fixed cylinder portion 171.

A first space S7 and a second space S8 are defined in the adapter main body 12a.
In the present embodiment, the first space S7 is a space from the space defined by the closing portion 170, the fixed cylinder portion 171 and the second communicating cylinder portion 161 to the fitting cylinder portion 145 via the slit 182. The first space S7 communicates the inside of the container body 2 with the inside of the vertical supply cylinder portion 14 through the upright introduction port 171a.
The second space S8 is the internal space of the valve chamber 165. The second space S8 communicates the inside of the container body 2 with the first space S7 through the inverted introduction port 153.

Next, the operation of the ejection container 1 will be described. First, the ejection operation in an upright posture will be described. In the upright posture of the ejection container 1, the ball valve 41 is seated on the valve seat portion 35 by its own weight, and the ball valve 164 is seated on the lower end opening edge of the second communication cylinder portion 161 by its own weight. In this way, the ball valve 164 cuts off the communication between the first space S7 and the second space S8 when the container body 2 is upright with the ejector main body 10 mounted on the container body 2.

In order to eject the liquid in the container body 2 in the upright posture of the ejection container 1, the trigger portion 63 is pulled backward against the urging force of the elastic plate portion 64. Then, the piston 72 retracts as the trigger portion 63 moves backward, so that the inside of the cylinder 71 is pressurized. When the inside of the cylinder 71 is pressurized, the liquid in the cylinder 71 flows into the accommodation space 40 through the connecting passage S1, so that the ball valve 41 is pressed against the valve seat portion 35. As a result, the communication between the inside of the container body 2 and the communication passage S1 is cut off. Therefore, the liquid in the cylinder 71 is introduced into the injection cylinder portion 15 through the connecting passage S1. When the liquid is introduced into the injection cylinder portion 15, the inside of the injection cylinder portion 15 is pressurized. Then, the inside of the small diameter piston portion 102a and the large diameter piston portion 102b in the accumulator valve 102 is pressurized through the communication hole 105.

In the present embodiment, the inner diameter of the large-diameter piston portion 102b is larger than the inner diameter of the small-diameter piston portion 102a. Therefore, a pressure directed toward the rear acts on the pressure accumulating valve 102 due to the difference in the pressure receiving area between the small diameter piston portion 102a and the large diameter piston portion 102b. When the pressures of the small-diameter piston portion 102a and the large-diameter piston portion 102b become equal to or higher than a predetermined pressure, the accumulator valve 102 is retracted against the forward urging force of the coil spring 120. Then, the front end portion of the accumulator valve 102 is separated from the valve seat portion 121, so that the inside of the injection cylinder portion 15 and the ejection hole 112a are connected to the communication hole 105, the inside of the accumulator valve 102, and the front end portion and the valve seat of the accumulator valve 102. Communicate through the gap between the portions 121. As a result, the liquid is ejected from the ejection hole 112a into the foam forming cylinder 133.

At this time, the inside of the foam making cylinder 133 becomes a negative pressure, the outside air (air) is introduced into the foam making cylinder 133 through the outside air introduction hole 137, and the liquid is mixed with the outside air in the foam making cylinder 133 and foams to foam. It becomes a shape and is ejected from the front end opening of the foam forming cylinder 133. The liquid ejected from the ejection hole 112a into the foam cylinder 133 is in the form of a mist. For example, the mist-like liquid collides with the inner peripheral surface of the foam cylinder 133 in the foam cylinder 133. , When the flow of liquid is disturbed, it is agitated with the outside air and becomes foamy.

When the operation of pulling the trigger portion 63 is stopped, the supply of the liquid from the inside of the cylinder 71 to the injection cylinder portion 15 through the connecting passage S1 of the vertical supply cylinder portion 14 is stopped. At this time, the accumulator valve 102 is advanced by the forward urging force of the coil spring 120, the front end portion of the accumulator valve 102 is seated on the valve seat portion 121, and the communication between the inside of the injection cylinder portion 15 and the ejection hole 112a is cut off. ..

The trigger portion 63 is urged forward by the elastic restoring force of the elastic plate portion 64 and returns to the original position. As the piston 72 advances with the forward movement of the trigger portion 63, a negative pressure is generated in the cylinder 71. At this time, the liquid of the container body 2 flows into the forward inverted adapter 12 through the suction pipe 175 due to the negative pressure generated in the cylinder 71. The liquid that has flowed into the upside-down adapter 12 then circulates in the inner cylinder portion 22 to push up the ball valve 41. As a result, the ball valve 41 is separated from the valve seat portion 35, and the liquid is introduced into the cylinder 71 through the communication passage S1 and the communication port 81 (supply port 27). This makes it possible to prepare for the next injection.

Subsequently, the ejection operation in the inverted posture will be described. In the inverted posture of the ejection container 1, the ball valve 41 is separated from the valve seat portion 35 by its own weight, and the ball valve 164 is separated from the lower end opening edge of the second communication cylinder portion 161 by its own weight. In this way, the ball valve 164 communicates the first space S7 and the second space S8 when the container body 2 is inverted with the ejector main body 10 mounted on the container body 2.

Even in the inverted posture of the ejection container 1, the inside of the cylinder 71 is pressurized by pulling the trigger portion 63 rearward. Then, the liquid in the cylinder 71 and the connecting passage S1 is introduced into the injection cylinder portion 15 and the accommodation space 40, respectively. At this time, the flow resistance when passing through the injection cylinder portion 15 is set so as to be smaller than the flow resistance when passing through the gap between the ball valve 41 and the valve seat portion 35. Therefore, the liquid is positively introduced into the injection cylinder portion 15 and is injected from the ejection hole 112a as described above.

On the other hand, when the trigger portion 63 returns to the front after the liquid is ejected, a negative pressure is generated in the cylinder 71 as in the above-mentioned upright posture. Then, the liquid that has flowed into the valve chamber 165 (second space S8) through the inverted introduction port 153 flows into the first space S7 from the lower end opening of the second communication cylinder portion 161 and enters the first communication cylinder portion 160 through the slit 182. Inflow to. The liquid flowing into the first communication cylinder portion 160 flows through the inner cylinder portion 22 and then is introduced into the cylinder 71 through the communication passage S1 and the communication port 81 (supply port 27). This makes it possible to prepare for the next injection.

By the way, in the ejection container 1, for example, when the remaining amount of the liquid in the container body 2 becomes low, air may be mixed with the liquid in the cylinder 71. The air mixed in the cylinder 71 tends to remain as bubbles in the cylinder 71, which causes an ejection failure or the like. Specifically, for example, the air (air bubbles) mixed in the cylinder 71 is expanded and contracted in the cylinder 71, which hinders the negative pressure in the cylinder 71 and causes a problem in sucking up the liquid from the container body 2. May occur.

In the present embodiment, when the trigger portion 63 is moved to the rearmost end position, the inside of the piston main body 91 and the inside of the cylinder 71 communicate with each other through the inner sliding portion 92 and the recessed portion 84. Then, the air bubbles remaining in the cylinder 71 flow into the piston main body 91 through the space between the inner sliding portion 92 and the recessed portion 84. The air bubbles that have flowed into the piston body 91 are discharged from the piston body 91 through the recovery passage S2 (through hole 83, inside the piston guide 78, discharge port 28, recovery gap G, and flow path leading to the first through hole 48). .. The bubbles that have passed through the recovery passage S2 reach the intermediate space S3 and then are discharged into the container body 2 through the communication passage S4. As a result, it is possible to suppress the inhibition of negative pressure in the cylinder 71, and it is possible to suitably suck up the liquid from the inside of the container body 2.

Further, if the pressure in the cylinder 71 and the injection cylinder portion 15 remains high when the trigger portion 63 is moved to the rearmost end position, the liquid drainage property of the ejected liquid is lowered. There is a risk. On the other hand, in the present embodiment, when the trigger portion 63 is moved to the rearmost end position, the inside of the cylinder 71 communicates with the inside of the container body 2 through the recovery passage S2. As a result, the pressure inside the cylinder 71 and the inside of the injection cylinder portion 15 can be reduced, and the liquid drainage property of the ejected liquid can be improved. Further, among the liquids in the cylinder 71, the liquids that have not been ejected can be recovered in the container body 2 via the recovery passage S2.

As described above, in the present embodiment, the upside-down adapter 12 attached to the lower end of the vertical supply cylinder portion 14 is provided in a state where the communication between the collection passage S2 and the inside of the container body 2 is cut off, and the upside-down adapter is provided. A communication passage S4 for communicating between the collection passage S2 and the inside of the container body 2 is formed between the 12 and the vertical supply cylinder portion 14.
According to this configuration, the bubbles and the liquid discharged from the cylinder 71 into the recovery passage S2 are discharged into the container body 2 through the communication passage S4. As a result, it is possible to inject the liquid in either the upright posture or the inverted posture, and it is possible to suppress the bubbles filled in the recovery passage S2 from dripping through the outside air introduction hole 80 or the like.
In particular, in the present embodiment, since the minimum value of the flow path cross-sectional area of the communication passage S4 is larger than the minimum value of the flow path cross-sectional area of the recovery passage S2, bubbles are effectively discharged into the container body 2. can.

Further, particularly in the trigger type liquid ejector 3 having the accumulator valve 102, the air discharged from the cylinder 71 at the time of priming (exhausting the air in the cylinder 71 and introducing the liquid into the cylinder 71) is ejected from the ejection hole. There is a possibility that it will not come out of 112a and will come and go between the inside of the cylinder 71 and the inside of the vertical supply cylinder portion 14 and the injection cylinder portion 15. In this case, it is difficult to smoothly introduce the liquid into the cylinder 71.

Even in such a case, in the present embodiment, by moving the trigger portion 63 to the rearmost end position and communicating the inside of the piston body 91 with the inside of the cylinder 71, the air in the cylinder 71 is collected in the recovery passage S2 and the intermediate space. It is discharged into the container body 2 through S3 and the communication passage S4. This facilitates the discharge of air from the cylinder 71 during priming, and the liquid can be smoothly introduced into the cylinder 71.

Further, for example, when the inside of the cylinder 71 becomes a negative pressure and the liquid is sucked in, the liquid in the container body 2 decreases. Therefore, a negative pressure is generated in the container body 2. In this case, if the inside of the container body 2 is sealed with respect to the external space, the container body 2 may be deformed due to the negative pressure.
On the other hand, the ejector main body 10 of the present embodiment is formed with an outside air introduction passage S5 that communicates the inside of the mounting cylinder portion 23 with the external space through the second through hole 49 when the inside of the cylinder 71 is depressurized. Has been done. Therefore, when the liquid is sucked up from the inside of the container body 2, the outside air can be introduced into the container body 2 through the outside air introduction passage S5 and the inside of the mounting cylinder portion 23. As a result, it is possible to prevent the container body 2 from being deformed.

According to the present embodiment, the first opening 48a of the first through hole 48 constitutes the opening of the recovery passage S2 that opens in the mounting cylinder portion 23, and the second opening 49a of the second through hole 49 is. , The opening of the outside air introduction passage S5 that opens in the mounting cylinder portion 23 is configured. The second opening 49a is arranged apart from the first opening 48a in a direction orthogonal to the vertical direction. Therefore, as described above, it is possible to prevent the liquid that has flowed into the mounting cylinder 23 from the first opening 48a through the recovery passage S2 from flowing into the second opening 49a without being discharged into the container body 2. can. As a result, it is possible to prevent the liquid from flowing back through the outside air introduction passage S5, and it is possible to prevent the liquid from leaking into the external space of the ejection container 1. Further, since it is possible to prevent the liquid from leaking to the external space, a stable discharge amount can be obtained.

Further, according to the present embodiment, the second opening 49a is arranged at different positions in the vertical direction with respect to the first opening 48a. Therefore, it is possible to further suppress the movement of the liquid flowing into the mounting cylinder portion 23 from the first opening portion 48a to the second opening portion 49a. In particular, in the present embodiment, the second opening 49a is located above the first opening 48a. Therefore, when the ejection container 1 is used in an upright posture, it is possible to particularly suppress the movement of the liquid from the first opening 48a to the second opening 49a.

<Second Embodiment>
In the upside-down adapter 212 of the trigger type liquid ejector 203 of the present embodiment, the first mounting member 240 (adapter main body 212a) includes a tubular portion 248 protruding upward from the facing wall portion 146. The tubular portion 248 is formed in a bottomed tubular shape that opens upward. In the present embodiment, the tubular portion 248 is, for example, cylindrical. The tubular portion 248 is located in front of the fitting tubular portion 145. The upper end portion of the tubular portion 248 is arranged below the wall portion main body 45a in the connecting wall portion 45 so as to face each other with a gap. The upper end of the tubular portion 248 is located above the top surface 46a of the recess 46. The upper end portion of the tubular portion 248 is arranged in front of the raised portion 45b so as to face each other with a gap. The tubular portion 248 is arranged in the intermediate space S3.

The vertical supply cylinder portion 214 of the present embodiment includes a protruding portion 244 protruding downward from the connecting wall portion 45. In the present embodiment, the protruding portion 244 is located in front of the raised portion 45b and protrudes downward from the lower surface 45c of the wall portion main body 45a. The lower end of the protrusion 244 is located below the raised portion 45b. The lower end surface of the protrusion 244 is located below the top surface 46a of the recess 46. The lower end portion of the protruding portion 244 is arranged above the facing wall portion 146 so as to face each other with a gap. The protrusion 244 is arranged in the intermediate space S3.

A second through hole 249 is formed in the protrusion 244. The second through hole 249 formed in the protrusion 244 penetrates the protrusion 244 in the vertical direction. As a result, the protruding portion 244 extends in the vertical direction and is formed in a tubular shape that opens on both sides in the vertical direction. In the present embodiment, the protruding portion 244 has a cylindrical shape arranged coaxially with the tubular portion 248. In the present embodiment, the inner diameter of the second through hole 249 increases downward. The second opening 249a, which is the lower end of the second through hole 249, is open to the lower end surface of the protrusion 244. In the present embodiment, the second opening 249a is located below the first opening 48a. The protrusion 244 is inserted into the tubular portion 248 from above. A gap is formed over the entire circumference between the outer peripheral surface of the protruding portion 244 and the inner peripheral surface of the tubular portion 248.

In the present embodiment, the outside air (air) that has flowed into the intermediate space S6 from the outside air introduction passage S5 passes through the second through hole 249 and flows into the inside of the tubular portion 248 from the second opening 249a. The outside air that has flowed into the tubular portion 248 passes through the gap between the outer peripheral surface of the protruding portion 244 and the inner peripheral surface of the tubular portion 248, and flows out to the outside of the tubular portion 248 in the intermediate space S3. In FIG. 6, it flows into the container body 2 through the communication passage S4 (not shown). As described above, in the present embodiment, the outside air introduction passage S5 communicates with the inside of the container body 2 through the gap between the protruding portion 244 and the tubular portion 248 and the communication passage S4.

According to the present embodiment, a protruding portion 244 in which the second opening 249a opens to the lower end surface is inserted into the tubular portion 248 from above. Therefore, even when the liquid discharged from the first opening 48a into the mounting cylinder 23 goes toward the second opening 249a, the liquid can be blocked by the tubular portion 248. Further, since the second opening 249a is open to the lower end surface of the protruding portion 244, the upper end opening of the tubular portion 248 and the second opening 249a can be suitably separated from each other. This makes it difficult for the liquid to reach the second opening 249a even when the liquid has entered the tubular portion 248 from the upper end opening of the tubular portion 248. As described above, the liquid discharged from the first opening 48a can be further suppressed from flowing into the second opening 249a, and the liquid can be further suppressed from leaking into the external space of the discharge container.

Further, according to the present embodiment, the upper end portion of the tubular portion 248 faces the front of the raised portion 45b via a gap. Therefore, between the first opening 48a and the second opening 249a, there is a front-rear gap between the raised portion 45b and the tubular portion 248, and a vertical gap between the upper end portion of the protruding portion 244 and the connecting wall portion 45. , And the gap between the outer peripheral surface of the protruding portion 244 and the inner peripheral surface of the tubular portion 248 forms a labyrinth structure. As a result, it is possible to further prevent the liquid from the first opening 48a from reaching the second opening 249a.

In each of the above-described embodiments, the following configurations can also be adopted.
The first opening of the first through hole and the second opening of the second through hole are not particularly limited as long as they are arranged apart from each other in the direction orthogonal to the vertical direction. The first opening and the second opening may be arranged at the same position in the vertical direction. The shape of the first through hole and the shape of the second through hole are not particularly limited.

In the second embodiment, the tubular portion 248 may be cut out except for the wall portion located between the first opening 48a and the second opening 249a in the front-rear direction. Further, instead of the tubular portion 248, another wall portion located between the first opening 48a and the second opening 249a in the front-rear direction may be provided. Also in these configurations, the liquid from the first opening 48a can be blocked by the provided wall portion, and the inflow of the liquid into the second opening 249a can be suppressed.
The upside-down adapter may not be provided.
It should be noted that the configurations described in the present specification can be appropriately combined within a range that does not contradict each other.

2 ... Container body, 2a ... Mouth, 3,203 ... Trigger type liquid ejector, 10 ... Ejector body, 11 ... Nozzle part, 12,212 ... Upside down adapter, 12a, 212a ... Adapter body, 14,214 ... Vertical supply cylinder, 15 ... Injection cylinder, 21 ... Outer cylinder, 22 ... Inner cylinder, 23 ... Mounting cylinder, 45 ... Connecting wall, 48 ... First through hole, 48a ... First opening, 49, 249 ... 2nd through hole, 49a, 249a ... 2nd opening, 63 ... trigger part, 71 ... cylinder, 72 ... piston, 78 ... piston guide, 83 ... through hole, 91 ... piston body, 92 ... internal sliding Moving part (sliding part), 93 ... outer sliding part (sliding part), 101 ... nozzle body, 102 ... accumulator valve, 112a ... ejection hole, 115 ... accumulator chamber, 146 ... facing wall part, 153 ... inverted introduction Mouth, 164 ... Ball valve (switching valve), 171a ... Upright introduction port, 244 ... Protruding part, 248 ... Cylindrical part, G ... Recovery gap, S2 ... Recovery passage, S4 ... Continuous passage, S5 ... Outside air introduction passage, S7 ... 1st space, S8 ... 2nd space

Claims (4)

The ejector body attached to the container that holds the liquid,
A nozzle portion that is arranged in front of the ejector main body and has an ejection hole for ejecting a liquid, and a nozzle portion.
Equipped with
The ejector body is
A vertical supply cylinder that extends in the vertical direction and sucks up the liquid in the container.
An injection cylinder portion that is disposed in front of the vertical supply cylinder portion and guides the liquid sucked up by the vertical supply cylinder portion to the nozzle portion.
A trigger portion arranged in front of the vertical supply cylinder portion so as to be movable backward in a forward urged state,
A cylindrical piston body to which the trigger portion is connected, and a piston having a sliding portion connected to the piston body and moving back and forth with the back and forth movement of the trigger portion.
A cylinder having a piston guide inserted into the piston body and being pressurized and depressurized by sliding the sliding portion as the piston moves back and forth.
Equipped with
The vertical supply cylinder portion is
An outer cylinder that extends in the vertical direction and opens downward,
The inner cylinder portion located inside the outer cylinder portion in the radial direction, and the inner cylinder portion.
A mounting cylinder portion that surrounds the inner cylinder portion on the outer side in the radial direction from the inner cylinder portion and communicates with the inside of the container body.
A connecting wall portion that extends radially outward from the outer peripheral surface of the inner cylinder portion and connects the inner cylinder portion and the mounting cylinder portion.
Equipped with
A first through hole and a second through hole that penetrate the connecting wall portion in the vertical direction are formed in the connecting wall portion.
A recovery gap extending in the vertical direction and opening downward is formed between the inner peripheral surface of the outer cylinder portion and the outer peripheral surface of the inner cylinder portion.
The lower end of the outer cylinder portion of the outer cylinder portion facing the inner cylinder portion via the recovery gap is fitted into the first through hole.
The ejector body has
A collection passage that communicates the inside of the cylinder and the inside of the mounting cylinder through the piston body and the piston guide, the collection gap, and the first through hole.
An outside air introduction passage that communicates the external space with the inside of the mounting cylinder through the second through hole.
Is formed,
The first through hole has a first opening constituting the opening of the recovery passage that opens in the mounting cylinder portion.
The second through hole has a second opening constituting the opening of the outside air introduction passage that opens in the mounting cylinder portion.
The trigger-type liquid ejector is characterized in that the second opening is arranged apart from the first opening in a direction orthogonal to the vertical direction. The trigger type liquid ejector according to claim 1, wherein the second opening is arranged at different positions in the vertical direction with respect to the first opening. Further provided with an upside-down adapter disposed below the vertical supply cylinder portion,
The upside-down adapter is
An adapter body that defines a first space that communicates the inside of the container and the inside of the vertical supply cylinder through the upright introduction port, and a second space that communicates the inside of the container and the first space through the inverted introduction port.
With the ejector main body attached to the container body, the communication between the first space and the second space is cut off when the container body is upright, and the first space and the first space are blocked when the container body is inverted. A switching valve that communicates with two spaces,
Equipped with
A communication passage for communicating between the collection passage and the inside of the container is formed between the outer peripheral surface of the upside-down adapter and the inner peripheral surface of the mounting cylinder portion.
The adapter body is
The facing wall portion located below the connecting wall portion and the facing wall portion
A cylindrical portion protruding upward from the facing wall portion and a tubular portion
Equipped with
The vertical supply cylinder portion includes a protruding portion that protrudes downward from the connecting wall portion.
The second through hole penetrates the protrusion in the vertical direction and penetrates the protrusion in the vertical direction.
The second opening opens to the lower end surface of the protrusion.
The trigger type liquid ejector according to claim 1 or 2, wherein the protruding portion is inserted into the tubular portion from above. The nozzle portion is
An accumulator chamber that communicates the inside of the injection cylinder with the ejection hole, and a nozzle body in which the ejection hole is formed.
A pressure accumulator valve that is arranged in the accumulator chamber so as to be movable backward in a forward urged state and cuts off communication between the inside of the injection cylinder and the ejection hole.
Equipped with
One of claims 1 to 3, wherein the accumulator valve moves rearward to communicate the inside of the injection cylinder portion and the ejection hole when the internal pressure of the accumulator chamber exceeds a predetermined value. Triggered liquid ejector as described in the section.

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