Trigger-type liquid sprayer

Abstract

To provide a trigger type liquid ejector capable of suppressing increase in size of a storage pump and increasing the amount of liquid stored in a storage cylinder at the time of communication with a recovery passage.SOLUTION: This trigger type liquid ejector comprises: an ejector body; and a nozzle member. The ejector body is provided with a longitudinal feed cylinder, a trigger mechanism, a storage cylinder, and a storage plunger. In the storage cylinder, an opening for enabling communication between the inside and the outside of the storage cylinder following rearward movement of the storage plunger is formed. The ejector body is provided with a recovery passage communicating with the inside of a container and formed at a different position in a front and back direction with respect to the opening, and a connection passage for connecting the recovery passage to the opening.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A trigger-type liquid sprayer is disclosed that includes a main pump unit that stores liquid and a trigger unit that operates the main pump unit. With this configuration, when the trigger unit is pulled backward, the cylinder of the main pump unit is pressurized, causing the liquid in the cylinder to flow toward the nozzle. This causes the liquid to be sprayed through the nozzle. Meanwhile, as the trigger unit returns to its forward position, the pressure inside the cylinder is reduced, causing the liquid in the container to flow into the cylinder.

[0003] For example, Patent Document 1 below discloses a trigger-type liquid sprayer that includes a reservoir pump section in addition to a main pump section. In this type of trigger-type liquid sprayer, when the trigger section is operated, a portion of the liquid delivered from the main pump section is sprayed through the nozzle holes, while the remaining liquid is stored in the cylinder of the reservoir pump section. Therefore, when the operation of the trigger section is stopped, the liquid stored in the cylinder of the reservoir pump section flows toward the nozzle holes. This allows the liquid to be continuously sprayed even when the trigger section is not operated.

[0004] In the configuration of Patent Document 1 listed below, the vertical supply tube section connecting the container body and the storage cylinder is provided with a recovery passage that connects the inside of the storage cylinder with the inside of the container body when the storage plunger moves backward. With this configuration, the storage cylinder and the recovery passage communicate with each other, so that the liquid stored in the storage cylinder is returned to the container body through the recovery passage. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-213497 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned prior art, because the inside of the storage cylinder is directly connected through the upper end opening of the recovery passage, it is difficult to increase the amount of liquid stored in the storage cylinder (stroke amount of the storage plunger) at the time of communication with the recovery passage while suppressing an increase in the size of the storage pump unit. In this case, it is not possible to ensure the time for the contents to be ejected from the storage cylinder after the operation of the trigger unit is stopped.

[0007] The present invention provides a trigger-type liquid ejector that can increase the amount of liquid stored in the storage cylinder at the time it communicates with the recovery passage while preventing the storage pump section from becoming too large. [Means for solving the problem]

[0008] In order to solve the above problems, the present disclosure employs the following aspects. A trigger-type liquid ejector according to one aspect of the present disclosure includes a ejector body attached to a container body that stores liquid, and a nozzle member provided in front of the ejector body and having an ejection hole formed therein for ejecting liquid forward, wherein the ejector body includes a vertical supply tube section that extends in a vertical direction and through which liquid flows, a trigger section provided in front of the vertical supply tube section so as to be movable rearward in a forward biased state, a trigger mechanism that sends liquid through the vertical supply tube section toward the ejection hole by the rearward movement of the trigger section, a storage cylinder provided between the vertical supply tube section and the nozzle member with its axial direction being in a first direction intersecting the vertical direction, and into which liquid that has passed through the vertical supply tube section is supplied by the rearward movement of the trigger section, and The ejector body is provided with a storage plunger that is arranged in a cylinder and is movable in the first direction, and that moves to one side in the first direction as liquid is supplied into the storage cylinder, and a biasing member that biases the storage plunger toward the other side in the first direction, wherein the storage cylinder has an open port that connects the inside to the outside as the storage plunger moves to one side in the first direction, a cylinder inner tube that allows the storage plunger to slide in the first direction, and a cylinder outer tube that surrounds the cylinder inner tube and has a connecting passage between it and the cylinder inner tube that communicates with the open port, and a recovery passage that connects the inside of the container body to the connecting passage is formed at a different position in the first direction from the open port in the ejector body.

[0009] According to this aspect, the interior of the storage cylinder and the collection passage communicate via the open port and the connecting passage, which improves the degree of freedom of the stroke of the storage plunger until it reaches the open position (the position where the storage plunger passes through the open port) compared to a configuration in which the interior of the storage cylinder and the collection passage communicate directly. In this case, by setting the open port to one side of the collection passage in the first direction, it is possible to prevent the storage pump unit from becoming larger and increase the amount of liquid stored in the storage cylinder when it reaches the open position. As a result, it is possible to ensure the time for the contents to be ejected from the storage cylinder after the operation of the trigger mechanism is stopped.

[0010] In the trigger-type liquid ejector according to the above aspect, it is preferable that the cylinder outer tube is formed integrally with the vertical supply tube portion, the cylinder outer tube is provided with a blocking member that blocks an opening on one side in the first direction, and the biasing member is interposed between the storage plunger and the blocking member within the cylinder inner tube. According to this aspect, the cylinder outer tube can be a common component with the vertical supply tube portion. Therefore, with the storage plunger (and the biasing member) pre-assembled to the cylinder inner tube, the cylinder inner tube can be fitted inside the cylinder outer tube, and then the opening of the cylinder outer tube can be closed with the blocking member, thereby assembling the storage pump with the biasing member interposed between the storage plunger and the blocking member. This makes it possible to easily manufacture a trigger-type liquid ejector that achieves the above-mentioned effects. [Effects of the Invention]

[0011] According to the present invention, it is possible to increase the amount of liquid stored in the storage cylinder when it reaches the open position while suppressing increases in the size of the storage cylinder and storage plunger. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a vertical cross-sectional view of the trigger-type liquid ejector according to the embodiment. [Figure 2] FIG. 1 is a partial cross-sectional view of a trigger-type liquid ejector showing the reservoir plunger in an open position. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a jetting container in which a trigger-type liquid jetter 1 is attached to a container body A will be described as an example. The trigger-type liquid ejector 1 shown in Figure 1 comprises an ejector body 2 that is attached to a container body A that contains liquid, a nozzle member 3 that has ejection holes 4 formed therein for ejecting the liquid, and a cover 100 that covers the ejector body 2 and the nozzle member 3.

[0014] The ejector body 2 has a vertical supply tube portion 10, an attachment cap 11, a reservoir pump portion 12, an injection tube portion 13, and a trigger mechanism 15 having a main pump portion 14.

[0015] In this embodiment, the central axis of the vertical supply tube portion 10 is referred to as the axis O. The direction along the axis O is referred to as the vertical direction, and in the vertical direction, the container body A side is referred to as the lower side, and the opposite side is referred to as the upper side. When viewed from the vertical direction, a direction intersecting the axis O is referred to as the front-rear direction L1, and a direction perpendicular to both the up-down direction and the front-rear direction L1 is referred to as the left-right direction L2. In the front-rear direction L1, the nozzle member 3 side is referred to as the front side, and the opposite side is referred to as the rear side.

[0016] The vertical supply tube section 10 is formed in a double-cylinder shape, including an inner tube 10a and a topped outer tube 10b into which the inner tube 10a is fitted. Liquid sucked up from inside the container body A by the main pump section 14 flows inside the inner tube 10a. The vertical supply tube section 10 is attached to the container body A by an attachment cap 11. The upper part of a pipe 16 is fitted into the lower end opening of the vertical supply tube section 10 (inner tube 10a). The pipe 16 extends downward inside the container body A when the trigger-type liquid sprayer 1 is attached to the container body A.

[0017] A ball valve 21 is provided within the inner cylinder 10a. The ball valve 21 is provided so as to be able to approach and separate from a lower valve seat 10c provided on the inner cylinder 10a from above the lower valve seat 10c. The ball valve 21 switches between communication and blocking between the inside of the container body A and the main pump section 14 through the inside of the vertical supply cylinder section 10. Specifically, the ball valve 21 is a check valve that blocks communication between the inside of the container body A and the main pump section 14 when pressurization is performed by the main pump section 14 (main cylinder 41 described below), and allows communication between the inside of the container body A and the main pump section 14 when depressurization is performed by the main pump section 14.

[0018] A storage valve 26 is provided in the inner cylinder 10a in a portion located above the ball valve 21. The storage valve 26 is provided so as to be movable toward and away from an upper valve seat 10d provided on the inner cylinder 10a from above the upper valve seat 10d. The storage valve 26 switches between communication between the main pump section 14 and the storage pump section 12 through the vertical supply tube section 10 and blocking communication. Specifically, the storage valve 26 is a check valve that allows liquid to be supplied from the vertical supply tube section 10 to the storage pump section 12 (a storage cylinder 31 described below) when the main pump section 14 is pressurized, and that restricts liquid from flowing out from the storage pump section 12 into the vertical supply tube section 10.

[0019] A recovery passage 17a, a residual pressure release passage 17b, and a communication passage 17c are provided between the inner cylinder 10a and the outer cylinder 10b. The recovery passage 17a extends vertically at a portion located rearward with respect to the axis O. The upper end of the recovery passage 17a opens upward through an upper communication port 17d formed at the top of the outer cylinder 10b. Meanwhile, the lower end of the recovery passage 17a is blocked by a blocking portion 17e formed at the lower end of the inner cylinder 10a.

[0020] The residual pressure release passage 17b extends in the vertical direction from a portion located forward with respect to the axis O. The upper end of the residual pressure release passage 17b terminates in the vertical middle portion of the vertical supply tube portion 10. Meanwhile, the lower end of the residual pressure release passage 17b passes through the vertical supply tube portion 10 in the vertical direction. The lower end opening of the residual pressure release passage 17b opens toward the inside of the container body A.

[0021] The communication passage 17c connects the lower ends of the recovery passage 17a and the residual pressure release passage 17b. The communication passage 17c extends circumferentially between the inner cylinder 10a and the outer cylinder 10b. That is, the lower end of the recovery passage 17a passes through the communication passage 17c and then opens into the container body A through the lower end opening of the residual pressure release passage 17b. Note that the recovery passage 17a and the residual pressure release passage 17b may open into the container body A separately without passing through the communication passage 17c.

[0022] A connecting tube 29 extending forward is provided at the upper end of the vertical supply tube 10. The rear end of the connecting tube 29 is connected to the inside of the vertical supply tube 10. A cylinder tube 30 is provided in the front of the vertical supply tube 10, in a portion located between the connecting tube 29 and the attachment cap 11. The cylinder tube 30 is formed in a cylindrical shape with a bottom that opens forward.

[0023] The reservoir pump section 12 includes a reservoir cylinder 31 , a reservoir plunger 32 , and a biasing member 33 . The storage cylinder 31 is provided above the vertical supply tube section 10 with the front-rear direction L1 as its axial direction. That is, in this embodiment, the front-rear direction L1 corresponds to the first direction. In this embodiment, the front side corresponds to the other side of the first direction. Also, in this embodiment, the rear side corresponds to one side of the first direction. However, the first direction does not have to coincide with the front-rear direction L1 as long as it is a direction that intersects with the up-down direction.

[0024] The liquid delivered by the main pump section 14 is supplied into the storage cylinder 31 through the vertical supply tube section 10 and the connecting tube section 29. Specifically, the storage cylinder 31 includes a cylinder outer tube 31a, a cylinder inner tube 31b, and a closing member 31c. The cylinder outer tube 31a has a top wall 34 and a peripheral wall 35, and is formed in a topped cylindrical shape that opens rearward. The cylinder outer tube 31a surrounds the cylinder inner tube 31b. In this embodiment, the cylinder outer tube 31a is formed integrally with the vertical supply tube portion 10, the connecting tube portion 29, and the cylinder tube portion 30. Note that the cylinder outer tube 31a may be formed separately from the vertical supply tube portion 10, etc.

[0025] The top wall 34 is formed with a passage hole 34 a that connects the inside of the storage cylinder 31 with the inside of the injection tube portion 13 . The peripheral wall 35 is formed in a multi-stage cylindrical shape with the inner diameter increasing toward the rear. Specifically, the peripheral wall 35 includes an outer cylinder small diameter portion 35a that constitutes the portion of the peripheral wall 35 other than the rear end, and an outer cylinder large diameter portion 35b that constitutes the rear end of the peripheral wall 35. The front-to-rear middle portion of the lower end of the outer cylinder small diameter portion 35a doubles as the top wall of the vertical supply tube portion 10 (outer cylinder 10b). A supply hole 36 that connects the inside of the cylinder outer cylinder 31a and the inside of the connecting tube portion 29 is formed in the front end of the outer cylinder small diameter portion 35a. The supply hole 36 penetrates the lower end of the peripheral wall 35 in the vertical direction. The supply hole 36 is provided forward and spaced apart from the upper communication port 17d.

[0026] The outer cylinder large-diameter portion 35b has an inner diameter larger than that of the outer cylinder small-diameter portion 35a. The outer cylinder large-diameter portion 35b includes an outer cylinder inclined portion 35b1 whose inner diameter gradually increases toward the rear, and an outer cylinder straight portion 35b2 that extends rearward from the outer cylinder inclined portion 35b1 with a uniform inner diameter.

[0027] The cylinder inner tube 31b is formed in a multi-stage cylindrical shape and is arranged coaxially with the cylinder outer tube 31a. Specifically, the cylinder inner tube 31b includes an inner tube small diameter portion 37a that forms the portion of the cylinder inner tube 31b other than the rear end portion, and an inner tube large diameter portion 37b that forms the rear end portion of the cylinder inner tube 31b. The inner cylinder small diameter portion 37a is tightly fitted into the outer cylinder small diameter portion 35a. A seal protrusion 50a is formed at the front end of the inner cylinder small diameter portion 37a, protruding from the outer peripheral surface of the inner cylinder small diameter portion 37a. The seal protrusion 50a extends annularly around the entire circumference of the inner cylinder small diameter portion 37a. The seal protrusion 50a is in tight contact with the inner peripheral surface of the outer cylinder small diameter portion 35a. In the illustrated example, multiple seal protrusions 50a are formed at intervals in the front-to-rear direction L1. Note that the seal protrusions 50a may be formed on the outer cylinder small diameter portion 35a, or may be provided separately between the inner cylinder small diameter portion 37a and the outer cylinder small diameter portion 35a.

[0028] The inner-cylinder large-diameter portion 37b includes an inner-cylinder inclined portion 37b1 whose outer diameter gradually increases toward the rear, and an inner-cylinder straight portion 37b2 that extends rearward from the inner-cylinder inclined portion 37b1 with a uniform outer diameter. The inner-cylinder large-diameter portion 37b is fitted into the outer-cylinder large-diameter portion 35b with the outer peripheral surface of the inner-cylinder inclined portion 37b1 closely contacting the inner peripheral surface of the outer-cylinder inclined portion 35b1 and the outer peripheral surface of the inner-cylinder straight portion 37b2 closely contacting the inner peripheral surface of the outer-cylinder straight portion 35b2. The inner-cylinder straight portion 37b2 is formed with a seal projection 50b that protrudes from the outer peripheral surface of the inner-cylinder straight portion 37b2. The seal projection 50b extends annularly around the entire circumference of the inner-cylinder straight portion 37b2. The seal projection 50b closely contacts the inner peripheral surface of the outer-cylinder straight portion 35b2. In the illustrated example, multiple sealing protrusions 50b are formed at intervals in the front-rear direction L1. The sealing protrusions 50b may be formed on the outer cylinder straight portion 35b2, or may be provided as separate members between the inner cylinder straight portion 37b2 and the outer cylinder straight portion 35b2.

[0029] An open port 38 is formed in the inner cylinder small diameter portion 37a at a portion located rearward of the upper communication port 17d. The open port 38 passes through the lower end of the inner cylinder small diameter portion 37a in the vertical direction.

[0030] A connecting passage 39 is formed between the outer tube small-diameter portion 35a and the inner tube small-diameter portion 37a, connecting the upper communication port 17d and the open port 38. The connecting passage 39 is, for example, a groove extending in the front-rear direction L1 at the lower end of the outer tube small-diameter portion 35a. The connecting passage 39 is connected to the upper communication port 17d at its front end. Meanwhile, the connecting passage 39 is connected to the open port 38 at its intermediate portion in the front-rear direction L1. Therefore, the open port 38 is connected to the recovery passage 17a through the connecting passage 39 and the upper communication port 17d. In the illustrated example, the connecting passage 39 extends to the rear end edge of the outer tube small-diameter portion 35a. The rear end opening of the connecting passage 39 is blocked by the inner tube inclined portion 37b1. However, it is sufficient that the connecting passage 39 is formed at least between the upper communication port 17d and the open port 38. Furthermore, the connection passage 39 may extend in the front-rear direction L1 at a different position in the circumferential direction relative to the open port 38, as long as it is configured to connect the upper communication port 17d and the open port 38.

[0031] The closing member 31c is formed in a cylindrical shape with a bottom that opens forward. The closing member 31c is firmly attached to the rear end of the cylinder outer cylinder 31a by screwing or the like. The bottom of the closing member 31c abuts against the rear end opening edges of the cylinder inner cylinder 31b and the cylinder outer cylinder 31a, closing the rear end openings of the cylinder inner cylinder 31b and the cylinder outer cylinder 31a. A seal cylinder 31c1 is formed at the bottom of the closing member 31c. The seal cylinder 31c1 is tightly fitted inside the inner cylinder straight portion 37b2. The closing member 31c may also be attached to the cylinder outer cylinder 31a by a method other than screwing, such as undercut fitting.

[0032] The storage plunger 32 is provided within the storage cylinder 31 so as to be movable in the front-to-rear direction L1. The storage plunger 32 is formed in a cylindrical shape with a top that opens rearward. The storage plunger 32 slides tightly in the front-to-rear direction L1 on the inner circumferential surface of the storage cylinder 31 (cylinder inner tube 31b). At the forward-most position, the storage plunger 32 blocks the passage hole 34a from the rear, thereby blocking communication between the interior of the vertical supply tube section 10 and the ejection hole 4 (inside the injection tube section 13). When the storage plunger 32 moves rearward from the forward-most position, it moves away from the passage hole 34a, thereby connecting the interior of the vertical supply tube section 10 and the interior of the injection tube section 13 (ejection hole 4) through the passage hole 34a. In the storage cylinder 31, the space located forward of the storage plunger 32 functions as a storage space S.

[0033] The storage space S is always in communication with the interior of the vertical supply tube section 10 through the connecting tube section 29. Therefore, the storage space S stores the liquid that has passed through the vertical supply tube section 10. The storage space S expands as the storage plunger 32 moves rearward due to the supply of liquid into the storage cylinder 31. Therefore, the storage space S can communicate with the interior of the injection tube section 13 through the passage hole 34a as the storage plunger 32 moves rearward. Furthermore, the storage space S communicates with the open port 38 when the storage plunger 32 moves rearward beyond the open port 38 (open position). In other words, when the storage plunger 32 reaches the open position, the storage space S communicates with the recovery passage 17a through the open port 38 and the connecting passage 39.

[0034] The biasing member 33 is interposed between the storage plunger 32 and the storage cylinder 31 and biases the storage plunger 32 forward. In this embodiment, the front end of the biasing member 33 is supported on the rear part of the storage plunger 32, and the rear end is supported on the bottom part of the blocking member 31c. The biasing member 33 is, for example, a metal coil spring.

[0035] The reservoir pump section 12 of this embodiment is assembled, for example, as follows. First, the storage plunger 32 is fitted into the cylinder inner tube 31b, and then the biasing member 33 is inserted. Then, the cylinder inner tube 31b is fitted into the cylinder outer tube 31a. Finally, the closing member 31c is attached to the cylinder outer tube 31a. At this time, as the closing member 31c moves forward relative to the cylinder outer tube 31a, a biasing force can be applied to the biasing member 33.

[0036] The injection tube portion 13 extends forward from the storage cylinder 31. The inside of the injection tube portion 13 can communicate with the storage space 31 through a passage hole 34a.

[0037] The trigger mechanism 15 includes a main pump portion 14 and a trigger portion 40 . The main pump unit 14 stores and pumps the liquid in the container body A in response to the operation of the trigger unit 40. The main pump unit 14 includes a main cylinder 41 and a main piston 42. The main cylinder 41 is fitted into the cylinder tube portion 30 from the front of the cylinder tube portion 30. The main cylinder 41 is formed in a cylindrical shape with a bottom that opens forward. A communication tube 41a is provided at the bottom of the main cylinder 41, connecting the inside of the main cylinder 41 to the inside of the vertical supply tube portion 10 (inner tube 10a). The communication tube 41a protrudes rearward from the outer periphery of the bottom of the main cylinder 41. The rear end of the communication tube 41a is inserted into a portion of the vertical supply tube portion 10 that is located above the ball valve 21. The rear end opening of the communication tube 41a is open inside the vertical supply tube portion 10. In other words, the inside of the main cylinder 41 and the inside of the vertical supply tube portion 10 are always in communication through the communication tube 41a.

[0038] The main piston 42 is provided in the main cylinder 41 so as to be movable in the front-rear direction L1. The main piston 42 includes a linking portion 42a and a sliding portion 42b. The linking portion 42a is formed in the shape of a closed-topped cylinder that opens rearward. The linking portion 42a is supported by a piston guide 41b that protrudes from the bottom of the main cylinder 41 so as to be movable back and forth. A biasing member 43 is interposed between the linking portion 42a and the piston guide 41b. The biasing member 43 biases the main piston 42 forward via the linking portion 42a. This allows the main piston 42 to move rearward while being biased forward. The biasing member 43 is, for example, a metal coil spring.

[0039] A discharge hole 47 is formed in a portion of the vertical supply tube portion 10 (outer tube 10b) that is exposed inside the piston guide 41b. The discharge hole 47 penetrates the outer tube 10b in the front-rear direction L1. The rear end opening of the discharge hole 47 communicates with the residual pressure release passage 17b described above.

[0040] The sliding portion 42b is connected to the rear end of the linking portion 42a. The sliding portion 42b is formed in a cylindrical shape and is arranged coaxially with the main cylinder 41. The sliding portion 42b surrounds the periphery of the linking portion 42a. The sliding portion 42b is in close contact with the inner circumferential surface of the main cylinder 41. The sliding portion 42b slides closely on the inner circumferential surface of the main cylinder 41 as the main piston 42 moves back and forth relative to the main cylinder 41.

[0041] The trigger portion 40 extends forward as it faces downward in front of the vertical supply tube portion 10. The upper end portion of the trigger portion 40 is supported by a bearing portion 48 provided below the injection tube portion 13 so as to be rotatable about an axis along the left-right direction L2. The front end portion of the linking portion 42a is connected to the middle portion of the trigger portion 40 in the up-down direction. Therefore, the main piston 42 moves rearward relative to the main cylinder 41 as the trigger portion 40 rotates rearward.

[0042] Nozzle member 3 is assembled to injection tube portion 13 from the front. Nozzle member 3 is formed in the shape of a cylinder with a top that opens toward the rear. The interior of nozzle member 3 is in communication with the interior of injection tube portion 13. An ejection hole 4 is formed in the top wall portion of nozzle member 3. Ejection hole 4 penetrates the top wall portion of nozzle member 3 in the front-to-rear direction L1.

[0043] The cover 100 is formed in a T-shape in a side view, and in a box shape that opens forward and downward. The cover 100 surrounds the ejector body 2 and the nozzle member 3 from above, behind, and sides, with the ejection holes 4 exposed forward. An exposure hole 100a is formed in the rear end of the cover 100. The rear end (closing member 31c) of the above-mentioned storage cylinder 31 protrudes rearward beyond the cover 100 through the exposure hole 100a.

[0044] Next, the operation of the trigger-type liquid ejector 1 described above will be described. To spray liquid from the trigger-type liquid sprayer 1, a user places a hand around the attachment cap 11 and hooks a finger on the trigger portion 40. While gripping the trigger-type liquid sprayer 1, the user pulls the trigger portion 40 backward. This causes the main piston 42 to move backward within the main cylinder 41. As a result, the inside of the main cylinder 41 is pressurized. This causes the liquid in the main cylinder 41 to be supplied into the vertical supply tube portion 10. The liquid supplied into the vertical supply tube portion 10 presses the ball valve 21 downward and also pushes the storage valve 26 upward. As a result, the storage valve 26 moves upward away from the upper valve seat portion 10d, with the ball valve 21 in contact with the lower valve seat portion 10c.

[0045] The liquid in the vertical supply tube portion 10 is supplied into the storage cylinder 31 (storage space S) through the connecting tube portion 29. When the liquid is supplied to the storage space S, the inside of the storage cylinder 31 is pressurized. This causes the storage plunger 32 to move rearward against the biasing force of the biasing member 33. As a result, the liquid is stored in the storage space S.

[0046] As the storage plunger 32 moves rearward, the storage space S and the inside of the injection tube portion 13 communicate with each other. As a result, the liquid stored in the storage space S flows through the injection tube portion 13 toward the ejection hole 4. After that, the liquid that passes through the injection tube portion 13 is ejected to the outside through the ejection hole 4. When the operation of the trigger portion 40 is released, the main piston 42 returns to its original position forward within the main cylinder 41 due to the biasing force of the biasing member 43, and the trigger portion 40 also returns to its original position forward. As a result, the pressure inside the main cylinder 41 is reduced. Then, the ball valve 21 rises from the lower valve seat 10c, and the inside of the container body A and the main cylinder 41 communicate with each other through the inside of the vertical supply tube portion 10. Meanwhile, the storage valve 26 remains seated on the upper valve seat 10d, thereby blocking communication between the inside of the main cylinder 41 and the inside of the storage space S through the inside of the vertical supply tube portion 10. As a result, the liquid in the container body A is sucked up into the vertical supply tube portion 10. The liquid that has flowed into the vertical supply tube portion 10 is introduced into the main cylinder 41, thereby making it possible to prepare for the next ejection operation.

[0047] In a configuration including storage pump section 12 as in this embodiment, each time trigger section 40 is operated, a portion of the liquid supplied from main cylinder 41 is ejected through ejection hole 4, and the remaining liquid is stored in storage space S. Therefore, when operation of trigger section 40 is stopped, the supply of liquid to storage space S stops, but storage plunger 32 moves forward due to the biasing force of biasing member 33, so that the liquid stored in storage space S is continuously supplied to injection tube section 13. This allows liquid to be continuously ejected through ejection hole 4.

[0048] As shown in FIG. 2, as the trigger portion 40 is continuously operated, the storage plunger 32 gradually moves rearward, increasing the amount of liquid stored in the storage space S. Meanwhile, when the storage plunger 32 reaches the open position, the storage space S and the open port 38 communicate with each other. This causes a portion of the liquid stored in the storage space S to be discharged from the storage space S through the open port 38. The liquid discharged from the storage space S passes through the connecting passage 39 and the recovery passage 17a and is returned to the container body A through the lower end opening of the residual pressure release passage 17b. That is, when the open port 38 is in communication with the storage space S, a portion of the liquid stored in the storage space S is ejected through the ejection hole 4, and a portion of the liquid is returned to the container body A. This limits the maximum stroke of the storage plunger 32, thereby preventing the pressure in the storage space S from increasing excessively.

[0049] When the liquid in the storage space S is discharged, the storage plunger 32 moves forward within the storage cylinder 31. Then, the storage plunger 32 blocks communication between the storage space S and the open port 38. This restricts the liquid in the storage space S from being discharged through the open port 38.

[0050] In this way, in the trigger-type liquid ejector 1 of this embodiment, the storage cylinder 31 is configured to have an open port 38 formed therein that connects the inside and outside of the storage cylinder 31 as the storage plunger 32 moves rearward. In addition, the ejector body 2 is configured to have a recovery passage 17a formed at a different position in the front-to-rear direction relative to the open port 38, which communicates with the inside of the container body A, and a connecting passage 39 that connects the recovery passage 17a and the open port 38. According to this configuration, the interior of the storage cylinder 31 (storage space S) and the recovery passage 17a communicate with each other via the open port 38 and the connecting passage 39, thereby improving the degree of freedom of the stroke until the storage plunger 32 reaches the open position compared to a configuration in which the storage space S and the recovery passage 17a communicate directly. In this case, by setting the open port 38 rearward of the recovery passage 17a, it is possible to prevent the storage pump unit 12 from becoming larger and to increase the amount of liquid stored in the storage space S when it reaches the open position. As a result, it is possible to ensure the time for the contents to be ejected from the storage cylinder 31 after the operation of the trigger unit 40 is stopped.

[0051] In the trigger-type liquid ejector 1 of this embodiment, the storage cylinder 31 has an open port 38 and is configured to include a cylinder inner tube 31b through which the storage plunger 32 can slide in the forward / backward direction L1, and a cylinder outer tube 31a that forms a connecting passage 39 between the cylinder inner tube 31b and the cylinder outer tube 31a. This configuration allows for greater freedom in designing the opening 38 and the connecting passage 39.

[0052] In this embodiment, the cylinder outer tube 31a is configured to be integrally formed with the vertical supply tube portion 10. According to this configuration, the cylinder outer tube 31a can be a common member with the vertical supply tube section 10. Therefore, with the storage plunger 32 (and the biasing member 33) pre-assembled to the cylinder inner tube 31b, the cylinder inner tube 31b is fitted inside the cylinder outer tube 31a, and then the opening of the cylinder outer tube 31a is closed with the closing member 31c, thereby assembling the storage pump section 12 with the biasing member 33 interposed between the storage plunger 32 and the closing member 31c. This makes it possible to easily manufacture the trigger-type liquid ejector 1 that exhibits the above-mentioned effects.

[0053] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible within the scope of the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the appended claims. In the above-described embodiment, the open port 38 is formed rearward of the upper communication port 17d, but the present invention is not limited to this configuration. The open port 38 may be formed at a position offset in the front-to-rear direction L1 from the upper communication port 17d, and may be formed forward of the upper communication port 17d, for example. In the above-described embodiment, the recovery passage 17a is formed in the vertical supply tube portion 10, but the configuration is not limited to this. The recovery passage 17a may be formed in a member other than the vertical supply tube portion 10 as long as it is provided in the ejector main body 2.

[0054] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0055] 1: Trigger-type liquid sprayer 2: Squirt body 3: Nozzle material 4:Blowout hole 10: Vertical supply tube 15: Trigger mechanism 17a: Collection passage 31: Storage cylinder 31a: Cylinder outer tube 31b: Cylinder inner tube 31c: Closure member 32: Reservoir plunger 38: Open mouth 39: Connecting passage 40: Trigger section A: Container body

Claims

1. an ejector body attached to a container body that contains a liquid; a nozzle member provided in front of the ejector body and having an ejection hole formed therein for ejecting the liquid forward, The ejector body includes: a vertical supply tube portion extending in the vertical direction and through which the liquid flows; a trigger portion provided in front of the vertical supply tube portion so as to be movable rearward in a forward biased state, and a trigger mechanism that sends liquid through the vertical supply tube portion toward the ejection holes by the rearward movement of the trigger portion; a storage cylinder, the storage cylinder being provided between the vertical supply tube portion and the nozzle member with an axial direction being a first direction intersecting the up-down direction, and into which the liquid that has passed through the vertical supply tube portion is supplied as the trigger portion moves rearward; a storage plunger that is disposed in the storage cylinder so as to be movable in the first direction and that moves to one side in the first direction as liquid is supplied into the storage cylinder; a biasing member that biases the storage plunger toward the other side in the first direction, The storage cylinder is a cylinder inner tube having an opening that communicates the inside and the outside with movement of the storage plunger toward one side in the first direction, and in which the storage plunger is slidable in the first direction; a cylinder outer cylinder that surrounds the cylinder inner cylinder and has a connecting passage formed between the cylinder outer cylinder and the cylinder inner cylinder, the connecting passage communicating with the open port, a recovery passage that connects the inside of the container body and the connection passage is formed in the ejector body at a position different from the opening in the first direction, The opening is connected to the recovery passage on one side of the vertical supply tube portion in the first direction.

2. The cylinder outer tube is formed integrally with the vertical supply tube portion, The cylinder outer tube is provided with a closing member that closes an opening on one side in the first direction, 2. The trigger-type liquid ejector according to claim 1, wherein the biasing member is interposed between the reservoir plunger and the closing member within the cylinder inner tube.

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