Trigger-type liquid sprayer

Abstract

To provide a trigger type liquid sprayer which can suppress unexpected blowout of liquid.SOLUTION: A trigger type liquid sprayer includes: a sprayer body; and a nozzle member. The sprayer body has a vertical supply cylinder section and a trigger mechanism having a trigger section and a main pump section. The main pump section has a main cylinder and a main piston which has a sliding section and a linkage section and moves in a longitudinal direction with respect to the main cylinder accompanying a movement of the trigger section in the longitudinal direction. The sprayer body is provided with a stopper which is rotatable around a pump axial line along the longitudinal direction between a lock position which is engaged with the linkage section and regulates a backward movement of the main piston with respect to the main cylinder and a lock release position which permits the backward movement of the main piston with respect to the main cylinder by releasing the engagement with the linkage section.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] The trigger mechanism includes a cylinder that communicates with the inside of the ejector body, and a piston that slides back and forth on the inner surface of the cylinder as the trigger moves back and forth. With this configuration, when the trigger is pulled backward, the piston pressurizes the cylinder, causing the liquid in the ejector body to flow toward the ejection hole. This causes the liquid to be ejected through the ejection hole. Meanwhile, as the trigger returns to its forward position, the pressure in the cylinder is reduced, causing the liquid in the container to be sucked up into the cylinder through the ejector body.

[0003] Here, as a configuration for preventing the liquid from being accidentally ejected through the ejection holes, a configuration in which a nozzle member is rotatably attached to the ejector body has been disclosed (see, for example, Patent Document 1 below). With this configuration, it is said that the ejection of liquid can be controlled by rotating the nozzle member between a communication position where the ejection holes communicate with the inside of the ejector body and a blocking position where the communication between the ejection holes and the inside of the ejector body is blocked. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-82042 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the prior art, the trigger can be operated even when the nozzle member is in the blocking position. Therefore, when the trigger is operated in the blocking position, the liquid remains pressurized in the ejector body. In this state, if the nozzle member is moved to the communicating position, the liquid in the ejector body may be ejected through the ejection holes.

[0006] The present invention provides a trigger-type liquid ejector that can suppress unexpected ejection of liquid. [Means for solving the problem]

[0007] 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 comprises a ejector body attached to a container body that contains 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 comprises a vertical supply tube portion that extends in the vertical direction and through which 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 having a main pump portion that sends liquid through the vertical supply tube portion towards the ejection hole by the rearward movement of the trigger portion, and the main pump portion is connected to the vertical supply tube portion and has a main pump opening forward. The ejector body is provided with a stopper that can rotate around the pump axis along the front-to-rear direction between a locked position where the linking part engages with the linking part to restrict rearward movement of the main piston relative to the main cylinder, and an unlocked position where the stopper is disengaged from the linking part to allow rearward movement of the main piston relative to the main cylinder.

[0008] According to this aspect, when the stopper is in the locked position, restricting the backward movement of the main piston relative to the main cylinder prevents liquid from being supplied into the vertical supply tube portion in the locked position, unlike when controlling the liquid ejection by rotating the nozzle member, for example. In particular, restricting the backward movement of the main piston itself prevents the liquid in the vertical supply tube portion from being pressurized when the stopper is in the locked position. As a result, unexpected ejection of liquid when the stopper is moved to the unlocked position can be prevented. Furthermore, because the lock position and unlock position of the stopper can be switched by rotating it, there is no need to remove or attach the stopper, unlike configurations where the stopper must be removed to switch between the lock position and unlock position, which prevents the stopper from being lost.

[0009] In the trigger-type liquid ejector of the above aspect, it is preferable that the ejector body comprises a storage cylinder that is provided between the vertical supply tube portion and the nozzle member, and into which liquid that has passed through the vertical supply tube portion is supplied as the trigger portion moves rearward, and a storage plunger that is arranged within the storage cylinder so as to be movable in an axial direction along the central axis of the storage cylinder, and that moves toward one side of the axial direction as liquid is supplied into the storage cylinder and is urged toward the other side of the axial direction. According to this aspect, when the stopper is in the locked position, the rearward movement of the main piston itself is restricted, thereby preventing the unexpected accumulation of liquid in the storage cylinder, and therefore preventing the unexpected spraying of liquid when the stopper is moved to the unlocked position.

[0010] In the trigger-type liquid ejector of the above aspect, the stopper is arranged coaxially with the pump axis and comprises a base portion surrounding the linking portion, and a plurality of engaging protrusions that protrude radially inward from the inner peripheral edge of the base portion intersecting the pump axis and are arranged at intervals around the pump axis, and the linking portion comprises a piston main body portion extending in the front-to-rear direction and a plurality of protrusions that protrude radially outward from the outer peripheral surface of the piston main body portion and are arranged at intervals around the pump axis, and it is preferable that in the locked position, the stopper is arranged in a position where each of the plurality of engaging protrusions engages with a corresponding one of the plurality of protrusions from behind, and in the unlocked position, each of the plurality of engaging protrusions is arranged in a position offset around the pump axis from each of the plurality of protrusions. According to this aspect, the engaging protrusions engage with the main piston at multiple points in the circumferential direction, so that the main piston can be stably supported when the stopper is in the locked position, thereby more reliably restricting the rearward movement of the main piston.

[0011] In the trigger-type liquid ejector of the above aspect, it is preferable that the base portion abuts against the edge of the front end opening of the main cylinder from the front of the main cylinder. According to this aspect, the stopper is supported from the rear by the main cylinder via the base portion, so that when the stopper is in the locked position, even if a rearward load acts on the main piston, the base portion can prevent the main piston from moving rearward together with the stopper. [Effects of the Invention]

[0012] According to the present invention, it is possible to prevent unexpected ejection of liquid. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a vertical cross-sectional view of the trigger-type liquid ejector according to the embodiment, showing a state in which the stopper is in a locked position. [Figure 2]1 is a vertical cross-sectional view of the trigger-type liquid ejector according to an embodiment, showing a state in which the stopper is in an unlocked position. [Figure 3] 3 is a cross-sectional view showing the periphery of a stopper in a portion corresponding to line III-III in FIG. 1. FIG. [Figure 4] 4 is a cross-sectional view corresponding to FIG. 3 showing the trigger-type liquid ejector according to the embodiment, with the stopper in an unlocked position. FIG. [Figure 5] FIG. 2 is a partial side view showing the trigger-type liquid ejector according to the embodiment, with the stopper in a locked position. [Figure 6] FIG. 2 is a partial side view showing a state in which the stopper is in an unlocked position in the trigger-type liquid ejector according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] 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, a cover 100 that covers the ejector body 2 and the nozzle member 3, and a stopper 200 that controls the ejection of the liquid.

[0015] 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.

[0016] 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.

[0017] The vertical supply tube section 10 is where the liquid pumped from inside the container body A by the main pump section 14 flows. 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. When the trigger-type liquid sprayer 1 is attached to the container body A, the pipe 16 extends downward inside the container body A.

[0018] A ball valve 21 is provided inside the vertical supply tube section 10. The ball valve 21 is provided so as to be able to approach and separate from a lower valve seat section 10a provided in the vertical supply tube section 10 from above the lower valve seat section 10a. 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 tube 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 later), 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.

[0019] A storage valve 26 is provided in a portion of the vertical supply tube 10 located above the ball valve 21. The storage valve 26 is provided so as to be able to move toward and away from an upper valve seat 10b provided in the vertical supply tube 10 from above the upper valve seat 10b. The storage valve 26 switches between communication between the main pump unit 14 and the storage pump unit 12 through the vertical supply tube 10 and blocking communication. Specifically, the storage valve 26 is a check valve that allows liquid to be supplied from the vertical supply tube 10 to the storage pump unit 12 (a storage cylinder 31 described below) when the main pump unit 14 is pressurized, and that restricts liquid from flowing out from the storage pump unit 12 into the vertical supply tube 10.

[0020] A connecting tube portion 29 extending forward is provided at the upper end of the vertical supply tube portion 10. The interior of the connecting tube portion 29 is connected to the interior of the vertical supply tube portion 10. A cylinder tube portion 30 is provided in the front of the vertical supply tube portion 10, in a portion located between the connecting tube portion 29 and the attachment cap 11. The cylinder tube portion 30 protrudes forward from the vertical supply tube portion 10 and is open forward.

[0021] 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. The storage cylinder 31 is formed in a topped cylindrical shape that opens to the rear. Liquid pumped 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. In this embodiment, the central axis of the storage cylinder 31 is called the axis O1. In this embodiment, the axis O1 extends in the front-rear direction L1. That is, in this embodiment, the front-rear direction L1 corresponds to the axial direction along the axis O1. In this embodiment, the rear side corresponds to one side of the axial direction. Also, in this embodiment, the front side corresponds to the other side of the axial direction. However, the axial direction does not have to coincide with the front-rear direction L1.

[0022] The storage plunger 32 is provided so as to be movable in the front-to-rear direction L1 within the storage cylinder 31. 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 within the storage cylinder 31. At the forward-most position, the storage plunger 32 blocks 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 opens communication between the interior of the vertical supply tube section 10 and the ejection hole 4 (inside the injection tube section 13). In the storage cylinder 31, the space located forward of the storage plunger 32 functions as a storage space 31a.

[0023] The storage space 31a is always in communication with the interior of the vertical supply tube 10 through the connecting tube 29, but can also be in communication with the interior of the injection tube 13 by movement of the storage plunger 32. The storage space 31a stores the liquid that has passed through the vertical supply tube 10. The storage space 31a expands as the storage plunger 32 moves rearward due to the supply of liquid into the storage cylinder 31. When storage plunger 32 is in the forward-most position, storage space 31a is not in communication with the interior of injection barrel 13. When storage plunger 32 is retracted from the forward-most position, storage space 31a is in communication with the interior of injection barrel 13.

[0024] The biasing member 33 is provided behind the storage plunger 32. The biasing member 33 is interposed between the storage plunger 32 and the storage cylinder 31, and biases the storage plunger 32 forward. The biasing member 33 is, for example, a metal coil spring.

[0025] The injection tube portion 13 extends forward from the storage cylinder 31. The interior of the injection tube portion 13 can communicate with the storage space 31. In this embodiment, the central axis of the injection tube portion 13 is referred to as the axis O2. The axis O2 extends in the front-rear direction L1 parallel to the axis O1. However, the axis O2 may be disposed coaxially with the axis O1. Furthermore, the axial direction along the axis O2 does not have to coincide with the front-rear direction L1.

[0026] 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 tubular portion 30 from the front thereof. The main cylinder 41 is formed in a cylindrical shape with a bottom that opens forward and is centered on the pump axis O3 along the front-rear direction L1. The main cylinder 41 is connected to a portion of the vertical supply tubular portion 10 that is located above the ball valve 21.

[0027] 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 extends in the front-rear direction on the pump axis O3 and includes a piston main body 42c, a seat 42d, and a protrusion 42e. The piston main body 42c is formed in a cylindrical shape with a top and centered on the pump axis O3. The piston main body 42c is disposed within the main cylinder 41 with its front end protruding from the main cylinder 41. A biasing member 43 is interposed between the piston main body 42c and the main cylinder 41. The biasing member 43 biases the main piston 42 forward via the piston main body 42c. This allows the main piston 42 to move in the front-to-rear direction L1 while being biased forward. The biasing member 43 is, for example, a metal coil spring.

[0028] The seat 42d is formed at the rear end of the piston body 42c. The seat 42d protrudes outward from the piston body 42c in a radial direction of the pump that intersects with the pump axis O3. In the illustrated example, the seat 42d is formed around the entire circumference of the piston body 42c. The protrusion 42e is formed on a portion of the piston main body 42c that is located forward of the base portion 42d. The protrusion 42e protrudes radially outward from the outer peripheral surface of the piston main body 42c and extends in the front-to-rear direction. The protrusions 42e are arranged around the pump axis O3 at intervals. In the illustrated example, the protrusions 42e are arranged in pairs at positions that face each other in the up-down direction across the pump axis O3. However, the number of protrusions 42e can be changed as appropriate.

[0029] The sliding portion 42b is connected to the rear end portion (base portion 42d) of the linking portion 42a. The sliding portion 42b is formed in a cylindrical shape and arranged coaxially with the pump axis O3. 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.

[0030] The trigger portion 40 extends forward in the downward direction in front of the vertical supply tube portion 10. The upper end 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 of the linking portion 42a (piston main body portion 42c) is connected to the middle portion of the trigger portion 40 in the up-down direction. Therefore, as the trigger portion 40 rotates rearward, the main piston 42 moves rearward relative to the main cylinder 41. The front end of the piston main body portion 42c is engaged with plate-shaped portions formed on the trigger portion 40 from both sides in the left-right direction L2. This restricts the rotation of the main piston 42 about the pump axis O3 relative to the main cylinder 41 and the trigger portion 40.

[0031] 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.

[0032] 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.

[0033] 1 and 3, the stopper 200 is configured to be rotatable in the pump circumferential direction (the direction rotating around the pump axis O3) relative to the main cylinder 41 between a locked position that restricts the rearward movement of the main piston 42 and an unlocked position (see FIGS. 2 and 4) that allows the rearward movement of the main piston 42. Specifically, the stopper 200 includes a base portion 201, a plurality of engagement protrusions 202, and a knob portion 203.

[0034] The base portion 201 includes a fitting cylinder 201a and a ring portion 201b. The fitting cylinder 201a is disposed coaxially with the pump axis O3. The fitting cylinder 201a surrounds the periphery of the linking portion 42a at a portion located forward of the sliding portion 42b. The fitting cylinder 201a is fitted into the main cylinder 41 so as to be rotatable in the pump circumferential direction. The ring portion 201b projects outward in the pump radial direction from the front end edge of the fitting cylinder 201a. The ring portion 201b abuts against the front end opening edge of the main cylinder 41 from the front of the main cylinder 41. A plurality of grooves are formed at intervals in the pump circumferential direction in the portion of the base portion 201 facing the main cylinder 41.

[0035] The engagement protrusion 202 protrudes radially inward from the inner peripheral edge of the ring portion 201b. The inner radial edge of the engagement protrusion 202 is located radially inward of the outer radial edge of the protrusion 42e. The circumferential dimension of the engagement protrusion 202 is smaller than the circumferential dimension of the protrusion 42e. When the main piston 42 is at the frontmost position (see FIG. 1), the engagement protrusion 202 passes between the base portion 42d and the protrusion 42e in the circumferential direction of the pump, thereby enabling the stopper 200 to rotate. On the other hand, when the main piston 42 is at a position other than the frontmost position (for example, the rearmost position shown in FIG. 2), the stopper 200 abuts against the protrusion 42e in the circumferential direction of the pump, thereby rendering the stopper non-rotatable.

[0036] When the stopper 200 is in the locked position, the engagement protrusions 202 protrude radially inward from positions that face each other in the up-down direction with the pump axis O3 therebetween. When the stopper 200 is in the locked position, each engagement protrusion 202 overlaps with the corresponding protrusion 42e from behind the protrusion 42e in a front view. When the stopper 200 is in the locked position, the corresponding protrusion 42e abuts against the front of each engagement protrusion 202, thereby restricting the rearward movement of the main piston 42 relative to the main cylinder 41 via the stopper 200. Note that the stopper 200 can restrict the rearward movement of the main piston 42 as long as at least a portion of the engagement protrusion 202 overlaps with the protrusion 42e.

[0037] 2, 4, and 6, when the stopper 200 is in the unlocked position, each engagement protrusion 202 is positioned offset in the pump circumferential direction relative to the corresponding protrusion 42e. In the illustrated example, each engagement protrusion 202 is positioned between adjacent protrusions 42e in the pump circumferential direction so as not to overlap any of the protrusions 42e in a front view. This allows the stopper 200 to allow the main piston 42 to move rearward relative to the main cylinder 41.

[0038] As the stopper 200 rotates in the pump circumferential direction, a protrusion (not shown) formed on the rear surface of the ring portion 201b moves within a recess (not shown) formed on the front-end opening edge of the main cylinder 41, thereby defining the rotation range. That is, when the stopper 200 is in the locked position, the protrusion abuts against the inner surface of the recess from one side in the pump circumferential direction, thereby restricting rotation of the stopper 200 in the pump circumferential direction to the other side. On the other hand, when the stopper 200 is in the unlocked position, the protrusion abuts against the inner surface of the recess from the other side in the pump circumferential direction, thereby restricting rotation of the stopper 200 in the pump circumferential direction to one side. In this way, by defining the rotation range of the stopper 200 between the ring portion 201b and the main cylinder 41, it is possible to prevent the defining portions (protrusion and recess) from being exposed to the outside of the trigger-type liquid ejector 1.

[0039] As shown in Figures 3 and 5, the knob portion 203 is used to rotate the stopper 200. The knob portion 203 protrudes from the base portion 201 (ring portion 201b) toward the outside in the pump radial direction. The knob portion 203 has a thickness direction that is the circumferential direction of the pump and extends in the front-to-rear direction. The rear portion of the knob portion 203 extends rearward beyond the base portion 201 along the outer peripheral surface of the cylinder tubular portion 30.

[0040] As the stopper 200 moves between the locked and unlocked positions, the knob 203 moves in the pump circumferential direction on one side (left side) of the left-right direction L2 relative to the main pump unit 14. In the example shown in FIGS. 3 and 4, when the stopper 200 is in the locked position, the knob 203 is positioned lower than when the stopper 200 is in the unlocked position. When the stopper 200 is in the locked position, the knob 203 may abut against a portion of the ejector main body 2 that is positioned lower than the cylinder tubular portion 30 from one side in the pump circumferential direction. This, together with the above-mentioned regulating portion, can restrict rotation of the stopper 200 to the other side in the pump circumferential direction at the locked position. In this case, since the knob 203 is in the lowest position, it is easy to determine that the stopper 200 has reached the locked position. When the stopper 200 is in the unlocked position, the knob portion 203 may abut against a portion of the ejector body 2 that is located above the cylinder tubular portion 30 from the other side in the pump circumferential direction. This, together with the above-mentioned regulating portion, makes it possible to restrict rotation of the stopper 200 to one side in the pump circumferential direction at the unlocked position. In this case, since the knob portion 203 is in the uppermost position, it is easy to determine that the stopper 200 has reached the unlocked position.

[0041] Next, a description will be given of the operation of the above-mentioned trigger-type liquid ejector 1. In the following description, the state in which the stopper 200 is in the lock position will be described as the initial state. First, as shown in FIGS. 1, 3, and 5, the stopper 200, which is in the locked position, is moved to the unlocked position shown in FIGS. 2, 4, and 6. Specifically, while gripping the knob portion 203, the stopper 200 is rotated toward one side (upward) in the pump circumferential direction. Then, as shown in FIG. 4, the stopper 200 rotates in the pump circumferential direction relative to the main pump portion 14, causing each engaging protrusion 202 to move to a position offset in the pump circumferential direction from the corresponding protrusion 42e. As a result, the engaging protrusion 202 retracts from the position where it overlaps with each protrusion 42e in a front view. As a result, the main piston 42 is allowed to move backward relative to the main cylinder 41.

[0042] Next, as shown in FIG. 2, to spray liquid from the trigger-type liquid sprayer 1, a user places their hand around the mounting cap 11 and hooks their finger on the trigger portion 40. While gripping the trigger-type liquid sprayer 1, the user pulls the trigger portion 40 backward. This moves the main piston 42 backward from its forwardmost position. Specifically, the main piston 42 moves backward within the main cylinder 41 as the protruding portion 42e passes between adjacent engaging projections 202 circumferentially adjacent to each other. This causes pressure to build up inside the main cylinder 41. 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 pushes the storage valve 26 upward. This causes the storage valve 26 to move upward away from the upper valve seat portion 10b, with the ball valve 21 in contact with the lower valve seat portion 10a.

[0043] The liquid in the vertical supply tube portion 10 is supplied into the storage cylinder 31 (storage space 31a) through the connecting tube portion 29. When the liquid is supplied into the storage cylinder 31, 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 cylinder 31.

[0044] As the storage plunger 32 moves rearward, the storage space 31a and the inside of the injection tube 13 communicate with each other. This causes the liquid stored in the storage cylinder 31 to flow through the injection tube 13 toward the ejection hole 4. The liquid that passes through the injection tube 13 is then ejected to the outside through the ejection hole 4. When the trigger 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 40 also returns to its original position forward. As a result, the pressure inside the main cylinder 41 is reduced. This causes the ball valve 21 to float up from the lower valve seat 10a, and the inside of the container body A and the main cylinder 41 communicate with each other through the vertical supply tube 10. Meanwhile, the storage valve 26 remains seated on the upper valve seat 10b, thereby blocking communication between the inside of the main cylinder 41 and the inside of the storage cylinder 31 through the vertical supply tube 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.

[0045] In a configuration including storage pump unit 12 as in this embodiment, each time trigger unit 40 is operated, a portion of the liquid supplied from main cylinder 41 is ejected through ejection hole 4, and a portion of the liquid is stored in storage cylinder 31. Therefore, when operation of trigger unit 40 is stopped, the supply of liquid to storage cylinder 31 stops, but the storage plunger 32 moves forward due to the biasing force of biasing member 33, so that the liquid stored in storage cylinder 31 is continuously supplied to injection tube unit 13. This allows liquid to be continuously ejected through ejection hole 4.

[0046] After the ejection operation is completed, the stopper 200 is moved toward the locked position. Specifically, the stopper 200 is rotated toward one side (downward) in the circumferential direction of the pump via the knob 203. As a result, the stopper 200 rotates in the circumferential direction of the pump relative to the main pump section 14, causing the engaging protrusions 202 to enter rearward of the corresponding protrusions 42e. As a result, each engaging protrusion 202 overlaps with the corresponding protrusion 42e in a front view, and the rearward movement of the main piston 42 relative to the main cylinder 41 is restricted by the stopper 200.

[0047] In this way, in the trigger-type liquid ejector 1 of this embodiment, the ejector main body 2 is provided with a stopper 200 that can rotate around the pump axis O3 between a locked position in which it engages with the linkage portion 42a to restrict the backward movement of the main piston 42 relative to the main cylinder 41, and an unlocked position in which it is disengaged from the linkage portion 42a to allow the main piston 42 to move backward relative to the main cylinder 41. According to this configuration, when the stopper 200 is in the locked position, restricting the backward movement of the main piston 42 relative to the main cylinder 41 makes it possible to prevent liquid from being supplied into the vertical supply tube portion 10 at the locked position, unlike when controlling the ejection of liquid by, for example, rotating the nozzle member. In particular, restricting the backward movement of the main piston 42 itself makes it possible to prevent the liquid inside the vertical supply tube portion 10, etc. from being pressurized when the stopper 200 is in the locked position. As a result, it is possible to prevent unexpected ejection of liquid when the stopper 200 is moved to the unlocked position. Moreover, because the lock position and unlock position of the stopper 200 can be switched by rotating it, unlike a configuration in which the stopper is removed to switch between the lock position and unlock position, there is no need to attach or detach the stopper 200. This makes it possible to prevent the stopper 200 from being lost, etc.

[0048] In the trigger-type liquid ejector 1 of this embodiment, the ejector main body 2 is configured to include a storage cylinder 31 into which liquid that has passed through the vertical supply tube section 10 is supplied, and a storage plunger 32 that can move in the forward / backward direction L1 within the storage cylinder 31. According to this configuration, when the stopper 200 is in the locked position, the rearward movement of the main piston 42 itself is restricted, thereby preventing liquid from being unexpectedly stored in the storage cylinder 31. Therefore, it is possible to prevent liquid from unexpectedly spouting out when the stopper 200 is moved to the unlocked position.

[0049] In the trigger-type liquid ejector 1 of this embodiment, the stopper 200 is configured so that, in the locked position, each of the multiple engagement protrusions 202 is positioned to engage with the corresponding protrusion 42e from behind. According to this configuration, the engaging protrusions 202 engage with the main piston 42 at multiple points around the pump, so that the main piston 42 can be stably supported when the stopper 200 is in the locked position. This makes it possible to more reliably restrict the rearward movement of the main piston 42.

[0050] In the trigger-type liquid ejector 1 of this embodiment, the base portion 201 is configured to abut against the front end opening edge of the main cylinder 41 from the front of the main cylinder 41. According to this configuration, the stopper 200 is supported from the rear by the main cylinder 41 via the base portion 201. Therefore, when the stopper 200 is in the locked position, even if a rearward load acts on the main piston 42, the base portion 201 can prevent the main piston 42 from moving rearward together with the stopper 200.

[0051] In the trigger-type liquid ejector 1 of this embodiment, the stopper 200 is configured to include a knob portion 203 that protrudes from a base portion 201 outward in the pump radial direction. According to this configuration, the operability of the stopper 200 can be improved.

[0052] 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 trigger-type liquid jetter 1 is configured to include the reservoir pump section 12, but the configuration is not limited to this. The trigger-type liquid jetter 1 according to the present invention may also be configured so that the liquid delivered from the main pump section 14 is jetted without being stored. In the above-described embodiment, the stopper 200 is described as having the knob portion 203, but the knob portion 203 is not an essential component. Furthermore, the knob portion 203 can be appropriately modified, for example, provided around the entire circumference of the pump.

[0053] 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]

[0054] 1: Trigger-type liquid sprayer 2: Squirt body 3: Nozzle material 4:Blowout hole 10: Vertical supply tube 14: Main pump section 15: Trigger mechanism 31: Storage cylinder 32: Reservoir plunger 40: Trigger section 41: Main cylinder 42: Main piston 42a: Liaison Department 42b: Sliding part 42c: Piston body 42e:Protrusion 200: Stopper 201: Base section 202: Engagement protrusion 203: Knob A: Container body O3: Pump axis (axis)

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 mechanism including a trigger unit provided in front of the vertical supply tube unit so as to be movable rearward in a forward biased state, and a main pump unit that sends liquid through the vertical supply tube unit toward the ejection holes by the rearward movement of the trigger unit, The main pump section a main cylinder communicating with the vertical supply tube portion and opening forward; a main piston having a sliding portion slidable on an inner peripheral surface of the main cylinder and a linking portion extending in a front-rear direction and connecting the sliding portion and the trigger portion, the main piston moving in the front-rear direction relative to the main cylinder as the trigger portion moves in the front-rear direction, The trigger-type liquid ejector is provided with a stopper that can rotate around the pump axis along the front-to-rear direction between a locked position where the ejector body engages with the linkage portion to restrict the rearward movement of the main piston relative to the main cylinder, and an unlocked position where the stopper is disengaged from the linkage portion to allow the rearward movement of the main piston relative to the main cylinder.

2. The ejector body includes: a storage cylinder provided between the vertical supply tube portion and the nozzle member, into which the liquid that has passed through the vertical supply tube portion is supplied as the trigger portion moves rearward; 2. The trigger-type liquid ejector of claim 1, further comprising: a storage plunger arranged within the storage cylinder so as to be movable in an axial direction along the central axis of the storage cylinder, which moves toward one side of the axial direction as liquid is supplied into the storage cylinder and is urged toward the other side of the axial direction.

3. The stopper is a base portion disposed coaxially with the pump axis and surrounding the linking portion; a plurality of engaging projections projecting inward from an inner peripheral edge of the base portion in a radial direction intersecting the pump axis and arranged at intervals around the pump axis, The linking unit is a piston main body portion extending in the front-rear direction; a plurality of protrusions that protrude radially outward from an outer circumferential surface of the piston body and are arranged at intervals around the pump axis, 3. A trigger-type liquid ejector as described in claim 1 or claim 2, wherein in a locked position, the stopper is positioned such that each of the multiple engaging protrusions engages with a corresponding one of the multiple protrusions from behind, and in an unlocked position, the multiple engaging protrusions are positioned such that each of the multiple engaging protrusions is offset around the pump axis relative to each of the multiple protrusions.

4. 4. The trigger-type liquid ejector according to claim 3, wherein the base portion abuts against the edge of a front end opening of the main cylinder from the front of the main cylinder.

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