Trigger-type liquid ejector

Abstract

To provide a trigger type liquid injection device capable of suppressing unexpected injection of liquid.SOLUTION: There is provided a trigger type liquid injection device comprising: a fitting cap; an injection device body; and a nozzle member. The injection device body comprises: a vertical supply cylinder part extending in a vertical direction and sucking liquid in a container body; and a trigger mechanism comprising a trigger part which is arranged on a front part of the vertical supply cylinder part in a forward energized state and in a rearward movable manner, and circulating the liquid from the vertical supply cylinder part to the injection hole. The injection device body has a stopper which can rotate between a lock position for regulating rearward movement of the trigger part, and a lock release position for allowing rearward movement of the trigger part, around an axial line to the injection device body and the fitting cap, in a state of providing a gap between itself and the fitting cap.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] The trigger type liquid ejector disclosed in the present invention includes an ejector body through which the liquid flows, a nozzle member having an ejection hole for ejecting the liquid forward and attached to the front end of the ejector body, and a trigger mechanism for causing the liquid in the ejector body to flow toward the ejection hole. The trigger mechanism includes a cylinder communicating with the inside of the ejector body, and a piston that slides in the forward and backward directions on the inner peripheral surface of the cylinder in accordance with the forward and backward movement of the trigger part. According to this configuration, when the trigger part is pulled backward, the inside of the cylinder is pressurized by the piston, so that the liquid in the ejector body flows toward the ejection hole. As a result, the liquid is ejected through the ejection hole. Meanwhile, as the trigger part returns to its forward position, the inside of the cylinder is depressurized, so that the liquid in the container is 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 hole, 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 ejection of liquid can be controlled by rotating the nozzle member between a communication position where the ejection hole communicates with the inside of the ejector body and a blocking position where communication between the ejection hole and the inside of the ejector body is blocked. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-82042 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional technology, 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 in the ejector body under pressure. 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 hole.

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

[0007] In order to solve the above problems, the present invention employs the following aspects. A trigger-type liquid ejector according to one embodiment of the present invention comprises an attachment cap that is removably attached to the mouth of a container body by rotation about an axis extending in the vertical direction, a ejector body that is attached to the container body via the attachment cap, and a nozzle member that is provided at the front end of the ejector body and has an ejection hole formed therein for ejecting liquid forward, wherein the ejector body extends in the vertical direction and has a vertical supply tube section that sucks up liquid in the container body, and a trigger section that is arranged in front of the vertical supply tube section and can move rearward in a forward biased state, and wherein the rearward movement of the trigger section causes liquid to flow from within the vertical supply tube section toward the ejection hole, and the ejector body is provided with a stopper that is rotatable about the axis relative to the ejector body and the attachment cap, with a gap between the attachment cap and a locked position that restricts the rearward movement of the trigger section and an unlocked position that allows the rearward movement of the trigger section.

[0008] According to this aspect, when the stopper is in the locked position, the operation (rearward movement) of the trigger portion itself is restricted, which makes it possible to prevent liquid from being supplied into the vertical supply tube portion at the locked position, unlike the case where the liquid ejection is controlled by, for example, rotating the nozzle member. Therefore, it is possible to prevent the liquid in the vertical supply tube portion from being pressurized when the stopper is in the locked position. As a result, it is possible to prevent unexpected ejection of liquid when the stopper is moved to the unlocked position. In particular, in this embodiment, since the stopper is configured to be rotatable with a gap between it and the attachment cap, it is possible to prevent the stopper from rotating together with the attachment cap when, for example, attaching or detaching the attachment cap to the container body, and therefore it is possible to prevent the stopper from moving unexpectedly to the unlocked position.

[0009] In the trigger-type liquid ejector of the above-mentioned 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 by the rearward movement of the trigger portion, and a storage plunger that is arranged within the storage cylinder so as to be movable in a first axial direction along the central axis of the storage cylinder, and that moves toward one side of the first axial direction as liquid is supplied into the storage cylinder and is urged toward the other side of the first axial direction. According to this aspect, as described above, when the stopper is in the locked position, the operation of the trigger itself is restricted, thereby preventing the liquid from being unexpectedly stored in the storage cylinder, and therefore preventing the liquid from unexpectedly spraying out when the stopper is moved to the unlocked position.

[0010] In the trigger-type liquid ejector of the above-mentioned aspect, the trigger mechanism comprises a main cylinder communicating with the vertical supply tube portion, a main piston that moves back and forth within the main cylinder in conjunction with the movement of the trigger portion, pressurizing and depressurizing the main cylinder, and a biasing member that biases the main piston forward, and it is preferable that the stopper is positioned between the main cylinder and the mounting cap in the vertical direction. According to this aspect, space efficiency can be improved compared to a configuration in which the stopper is positioned on the outside in the vertical direction relative to the ejector body or the mounting cap, thereby making it possible to reduce the vertical size of the trigger-type liquid ejector.

[0011] In the trigger-type liquid ejector of the above-mentioned aspect, it is preferable that the stopper has a rear regulating surface that abuts against the trigger portion from the rear of the trigger portion in the locked position to regulate rearward movement of the trigger portion, and a front regulating surface that abuts against the trigger portion from the front of the trigger portion in the locked position to regulate forward movement of the trigger portion. According to this aspect, when the stopper is in the locked position, the rearward movement of the trigger portion is restricted by the rearward restriction surface. In particular, in this aspect, since the stopper has a front restriction surface, the forward movement of the trigger portion can also be restricted when the stopper is in the locked position. This makes it possible to suppress the movement of the main piston due to an increase in pressure inside the container body, for example, when the stopper is in the locked position. Effect of the Invention

[0012] According to the present invention, unexpected ejection of liquid can be suppressed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a vertical cross-sectional view of the trigger-type liquid ejector according to the first embodiment, showing a state in which the stopper is in a locked position. [Diagram 2] FIG. 2 is a bottom view showing the relationship between the trigger portion, the stopper, and the cover in the trigger-type liquid ejector according to the first embodiment. [Diagram 3] FIG. 2 is an enlarged cross-sectional view of the trigger-type liquid ejector according to the first embodiment, showing a state in which the stopper is in an unlocked position. [Figure 4] FIG. 2 is a bottom view showing the relationship between the trigger portion, the stopper, and the cover in the trigger-type liquid ejector according to the first embodiment. [Diagram 5]FIG. 2 is a bottom view showing the relationship between the trigger portion, the stopper, and the cover in the trigger-type liquid ejector according to the first embodiment. [Figure 6] FIG. 11 is a vertical cross-sectional view of the trigger-type liquid ejector according to the second embodiment, showing a state in which the stopper is in a locked position. [Figure 7] FIG. 11 is a vertical cross-sectional view of the trigger-type liquid ejector according to the second embodiment, showing a state in which the stopper is in an unlocked position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] (First embodiment) 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 FIG. 1 comprises an ejector body 4 having a cover 2 and an ejection mechanism 3, a nozzle member 6 having an ejection hole 5 for ejecting liquid, an attachment cap 7, and a stopper 8.

[0015] The ejection mechanism 3 has a vertical supply tube portion 10, a connecting tube 11, a storage pump portion 12, an ejection 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 called the axis O. The direction along the axis O is called the vertical direction, and in the vertical direction, the container body A side is called the lower side, and the opposite side is called the upper side. When viewed from the vertical direction, a direction that intersects with the axis O is called the front-rear direction L1, and a direction perpendicular to both the vertical direction and the front-rear direction L1 is called the left-right direction L2. In the front-rear direction L1, the nozzle member 6 side is called the front side, and the opposite side is called the rear side.

[0017] The vertical supply tube section 10 is circulated with the liquid sucked up from the container body A by the main pump section 14. The vertical supply tube section 10 is formed in a multi-stage cylindrical shape with a diameter decreasing toward the top. Specifically, the vertical supply tube section 10 includes a small diameter section 10a located at the top and a large diameter section 10c connected to the lower side of the small diameter section 10a via a step section 10b. The vertical supply tube section 10 is formed in a double cylindrical shape.

[0018] The large diameter portion 10c is provided with a flange portion 10d that protrudes outward in the radial direction (the direction intersecting the axis O when viewed from the top-bottom direction). A ball valve 21 is provided in the small diameter portion 10a. The ball valve 21 is provided so as to be movable toward and away from a lower valve seat portion 10f provided in the small diameter portion 10a from above the lower valve seat portion 10f. The ball valve 21 switches between communication and blocking between the inside of the container body A and the main pump portion 14 through the inside of the small diameter portion 10a. Specifically, the ball valve 21 is a check valve that blocks communication between the inside of the container body A and the main pump portion 14 when pressurized by the main pump portion 14 (main cylinder 41 described later) and allows communication between the inside of the container body A and the main pump portion 14 when depressurized by the main pump portion 14.

[0019] A pipe 23 is provided in the vertical supply tube portion 10. The pipe 23 is fitted into the small diameter portion 10a from below through the inside of the large diameter portion 10c. When the trigger-type liquid ejector 1 is attached to the container body A, the pipe 23 extends downward within the container body A.

[0020] The connecting tube 11 extends forward from the upper end of the small diameter portion 10a. A blocking plug 25 is attached to the front end opening of the connecting tube 11. The blocking plug 25 blocks the front end opening of the connecting tube 11. A storage valve 26 is provided in a portion of the small diameter portion 10a located above the ball valve 21. The storage valve 26 is provided so as to be movable from above an upper valve seat portion 10g provided in the small diameter portion 10a. The storage valve 26 switches between communication and blocking between the main pump portion 14 and the storage pump portion 12 through the connecting tube 11 and the vertical supply tube portion 10. Specifically, the storage valve 26 is a check valve that allows liquid to be supplied from the vertical supply tube portion 10 to the storage pump portion 12 (a storage cylinder 31 described later) when the main pump portion 14 is pressurized, and restricts the outflow of liquid from the storage pump portion 12 to the vertical supply tube portion 10.

[0021] The reservoir pump portion 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 portion 10. The storage cylinder 31 has a front wall portion 31a located at the front end and a cylinder tube 31b extending rearward from the outer circumferential edge of the front wall portion 31a, and is formed in a topped cylinder shape that opens rearward. In this embodiment, the central axis of the storage cylinder 31 (cylinder tube 31b) 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 an axial direction (first axial direction) along the axis O1. In this embodiment, the rear side corresponds to one side of the axial direction along the axis O1. In addition, in this embodiment, the front side corresponds to the other side of the axial direction along the axis O1. However, the axial direction along the axis O1 does not have to coincide with the front-rear direction L1.

[0022] A supply hole 31c is formed at the front end of the cylinder 31b and the front end of the communication cylinder 11. The supply hole 31c passes through the lower part of the cylinder 31b and the upper part of the communication cylinder 11 in the vertical direction. The supply hole 31c connects the inside of the storage cylinder 31 and the inside of the communication cylinder 11. A spring receiving member 35 is fitted into the rear end opening of the cylinder 31b. A communication opening 31d is formed in the front wall portion 31a, penetrating the front wall portion 31a in the front-rear direction L1. The communication opening 31d is disposed coaxially with the axis O1.

[0023] The storage plunger 32 is provided so as to be movable in the front-rear direction L1 within the storage cylinder 31. The storage plunger 32 is formed in a topped cylindrical shape that opens toward the rear. Specifically, the storage plunger 32 has a blocking wall 32a located at the front end and a sliding cylinder 32b extending rearward from the outer circumferential edge of the blocking wall 32a. The storage plunger 32 moves back and forth within the storage cylinder 31 with the outer circumferential surface of the sliding cylinder 32b sliding on the inner circumferential surface of the cylinder 31b, so that the blocking wall 32a approaches and moves away from the front wall portion 31a from the rear.

[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 spring receiving member 35, and biases the storage plunger 32 forward.

[0025] The injection tube portion 13 extends forward from the front wall portion 31a. The inside of the injection tube portion 13 is configured to be able to communicate with the inside of the storage cylinder 31 through the communication port 31d. In this embodiment, the central axis of the injection tube portion 13 is called 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. In addition, the axial direction (second 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 section 14 stores and pumps the liquid in the container body A in response to the operation of the trigger section 40. The main pump section 14 includes a main cylinder 41 and a main piston 42. The main cylinder 41 is provided in front of the small diameter portion 10a of the vertical supply tube portion 10. The main cylinder 41 is formed in a bottomed tube shape that is centered on the pump axis O3 along the front-rear direction L1 and opens forward. The main cylinder 41 is fitted from the front into a mounting tube 46 that extends forward from the vertical supply tube portion 10. The mounting tube 46 is disposed coaxially with the pump axis O3. Therefore, the lower half of the mounting tube 46 extends while curving upward as it moves outward in the left-right direction L2.

[0027] A communication tube 41a is provided on the bottom wall of the main cylinder 41 to communicate between the inside of the main cylinder 41 and the inside of the vertical supply tube portion 10 (small diameter portion 10a). The communication tube 41a protrudes rearward from the outer circumferential portion of the bottom wall of the main cylinder 41. The rear end of the communication tube 41a is inserted into a portion of the small diameter portion 10a 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. That is, the inside of the main cylinder 41 and the inside of the vertical supply tube portion 10 are communicated through the communication tube 41a.

[0028] 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 piston body portion 42a and a sliding cylindrical portion 42b. The piston body 42a is formed in a cylindrical shape with a top and centered on the pump axis O3. The piston body 42a is disposed inside the main cylinder 41. A biasing member 43 is interposed between the piston body 42a and the main cylinder 41. The biasing member 43 biases the main piston 42 forward via the piston body 42a. As a result, the main piston 42 is configured to be movable in the front-rear direction L1 in a forward biased state.

[0029] The sliding cylinder portion 42b is connected to the rear end portion of the piston body portion 42a. The sliding cylinder portion 42b is formed in a cylindrical shape arranged coaxially with the pump axis O3. The sliding cylinder portion 42b surrounds the piston body portion 42a. The sliding cylinder portion 42b is in close contact with the inner circumferential surface of the main cylinder 41. The sliding cylinder portion 42b slides 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 portion of the trigger portion 40 is supported by a bearing portion 48 located at the front end portion of the ejection mechanism 3 so as to be rotatable about an axis along the left-right direction L2. The bearing portions 48 are located on both sides of the front end portion of the ejection mechanism 3 in the left-right direction L2 with respect to the injection tube portion 13. The front end portion of the piston main body 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.

[0031] Nozzle member 6 is attached to injection tube portion 13 from the front. Nozzle member 6 is formed in a topped cylindrical shape that opens toward the rear. The inside of nozzle member 6 communicates with the inside of injection tube portion 13. An ejection hole 5 is formed in the top wall portion of nozzle member 6. Ejection hole 5 penetrates the top wall portion of nozzle member 6 in the front-rear direction L1.

[0032] The mounting cap 7 is formed in a cylindrical shape extending in the vertical direction. The axis O4 of the mounting cap 7 is eccentric forward with respect to the axis O of the vertical supply tube portion 10. However, the axis O4 of the mounting cap 7 and the axis O of the vertical supply tube portion 10 may be coaxial. In the following description, the direction intersecting the axis O4 in a plan view may be referred to as the cap radial direction, and the direction around the axis O4 may be referred to as the cap circumferential direction.

[0033] The mounting cap 7 is removably fastened to the mouth A1 of the container body A. However, the method of fixing the mounting cap 7 to the mouth A1 may be a method other than a screw, as long as the mounting cap 7 can be attached to and detached from the mouth A1 by a rotating operation. When the mounting cap 7 is attached to the mouth A1, the flange portion 10d is sandwiched between the mounting cap 7 and the upper opening edge of the mouth A1 via a packing. In this manner, the ejection mechanism 3 (ejector main body 4) is attached to the container body A. In this embodiment, a tapered surface 7a is formed on the upper end of the mounting cap 7. The tapered surface 7a is formed by gradually reducing the outer diameter of the mounting cap 7 as it goes upward.

[0034] The cover 2 is formed in a T-shape in side view, and in a box shape that opens forward and downward. The cover 2 surrounds the ejection mechanism 3 and the nozzle member 6 from above, behind, and sides, with the ejection holes 5 exposed to the front. Specifically, the cover 2 is configured such that an upper storage section 60, a lower storage section 61, and an inner flange section 62 are integrally formed. The upper storage section 60 is formed in a bottomed cylindrical shape that opens forward. A portion from the storage pump section 12 to the nozzle member 6 in the front-rear direction L1 is stored in the upper storage section 60. A portion of the upper storage section 60 from the center to the front end in the front-rear direction L1 is open downward.

[0035] The lower storage section 61 is formed in a semi-cylindrical shape that extends in the vertical direction and is open toward the front. The upper end edge of the lower storage section 61 is connected to the open end edge (lower end edge) of the upper storage section 60 at the center of the upper storage section 60 in the front-rear direction L1. The lower storage section 61 surrounds the part of the vertical supply tube section 10 that is located above the mounting cap 7 from the rear and sides. The lower part of the rear end of the lower storage section 61 protrudes rearward compared to the upper part. At the rear end of the lower storage section 61, the lower part and the upper part are connected via an inclined part 61a. The inclined part 61a extends rearward as it goes downward.

[0036] The inner flange portion 62 protrudes inward in the radial direction of the cap from the lower edge of the lower housing portion 61. The inner peripheral edge of the inner flange portion 62 is close to or in contact with the outer peripheral surface of the large diameter portion 10c. The lower surface of the inner flange portion 62 faces the upper edge of the mounting cap 7 with a gap therebetween in the vertical direction. A locking portion 63 is formed on the inner periphery of the inner flange portion 62 at a portion located rearward of the vertical supply tube portion 10 (large diameter portion 10c). The locking portion 63 protrudes upward from the inner flange portion 62. The locking portion 63 is locked to a locking piece 10h formed on the vertical supply tube portion 10. The locking piece 10h extends rearward from the step portion 10b in a cantilever manner. The tip of the locking piece 10h is locked to the locking portion 63 in the front-rear direction. A vertical rib 10j is formed on the small diameter portion 10a. The vertical rib 10j protrudes rearward from the small diameter portion 10a and extends in the up-down direction. The lower end edge of the vertical rib 10j is connected to the locking piece 10h.

[0037] As shown in FIG. 1 and FIG. 2, a slit 65 is formed in the outer peripheral portion of the inner flange portion 62. The slit 65 is formed in an arc shape extending in the cap circumferential direction. The slit 65 penetrates the inner flange portion 62 in the vertical direction, and penetrates the lower accommodation portion 61 and the inner flange portion 62 at both ends in the cap circumferential direction. A positioning rib 67 is formed in a portion of the above-mentioned inclined portion 61a that faces one end of the slit 65 in the cap circumferential direction in the vertical direction. The positioning rib 67 protrudes downward from the inclined portion 61a. The positioning rib 67 straddles the slit 65 in the front-rear direction L1. The lower end edge of the positioning rib 67 is arranged with a vertical gap between it and the inner flange portion 62.

[0038] The stopper 8 is configured to be rotatable in the cap circumferential direction relative to the ejector body 4 and the mounting cap 7 between a locked position that restricts the rearward movement of the trigger portion 40 and an unlocked position (see FIG. 3) that allows the rearward movement of the trigger portion 40. Specifically, the stopper 8 includes a ring portion 71, a first engaging portion 72, a second engaging portion 73, an arm portion 74, and a restricting portion 75. In the following description, unless otherwise specified, the stopper 8 will be described based on a state in which it is in the locked position.

[0039] The ring portion 71 is disposed coaxially with the axis O4. The ring portion 71 is disposed between the main pump portion 14 and the mounting cap 7 in the vertical direction. Specifically, the ring portion 71 surrounds the periphery of the upper end portion of the mounting cap 7. The inner peripheral surface of the ring portion 71 forms a tapered surface 71a that slopes downward toward the outside in the cap radial direction. The tapered surface 71a of the ring portion 71 faces the tapered surface 7a of the mounting cap 7 with a gap therebetween. In this embodiment, the ring portion 71 and the mounting cap 7 are separated in the vertical direction and the cap radial direction while overlapping each other as viewed from the cap radial direction. Therefore, the gap between the tapered surfaces 7a, 71a extends downward toward the outside in the cap radial direction. However, the ring portion 71 and the mounting cap 7 may have a gap only in either the vertical direction or the cap radial direction as long as they are disposed apart from each other.

[0040] As shown in FIG. 2, the ring portion 71 is integrally formed with one end of the pair of arc portions 71b in the cap circumferential direction rotatably connected to each other via a hinge portion 71c. In the illustrated example, a locking portion 71d is formed at the other end of the pair of arc portions 71b in the cap circumferential direction. The ring portion 71 is formed in a ring shape by locking the locking portions 71d of the arc portions 71b to each other. The arc portions 71b may have different central angles (circumferential lengths). The ring portion 71 may also be integrally formed in a ring shape.

[0041] 1 and 2, the first engagement portion 72 is integrally connected to the rear end portion of the ring portion 71. The first engagement portion 72 is formed in an L-shape in a side view. The first engagement portion 72 includes a first protruding portion 72a and a first standing portion 72b. The first protruding portion 72a protrudes rearward from the upper edge of the ring portion 71 and extends in an arc shape in the circumferential direction of the cap. The first protruding portion 72a faces the lower surface of the inner flange portion 62 with a gap therebetween in the up-down direction. In the illustrated example, the central angle of the first protruding portion 72a with respect to the axis O4 is set to 90° or less.

[0042] The first standing portion 72b extends upward from the rear end edge of the first protruding portion 72a. The first standing portion 72b extends following the rear end edge of the first standing portion 72b. The first standing portion 72b enters the slit 65 through the lower end opening of the slit 65. The upper end edge of the first standing portion 72b is located lower than the lower end edge of the positioning rib 67. Therefore, the first standing portion 72b is configured to be able to advance and retreat from the slit 65 by passing under the positioning rib 67 as the stopper 8 rotates.

[0043] An engagement protrusion 72c is formed on the outer peripheral surface of the first standing portion 72b. When the stopper 8 is in the locked position, the engagement protrusion 72c engages with the upper opening edge of the slit 65 from above. As a result, the stopper 8 is supported in a suspended state by the cover 2, and is disposed with a gap between it and the mounting cap 7.

[0044] The second engagement portion 73 is integrally connected to the front end portion of the ring portion 71. That is, in the illustrated example, the second engagement portion 73 faces the first engagement portion 72 in the cap radial direction. However, the positions of the first engagement portion 72 and the second engagement portion 73 in the cap circumferential direction can be changed as appropriate. In addition, the first engagement portion 72 and the second engagement portion 73 may be integrally formed and extend around the entire circumference of the ring portion 71.

[0045] The second engagement portion 73 is formed in an L-shape in a side view. The second engagement portion 73 includes a second protruding portion 73a, a second standing portion 73b, and a positioning rib 73c. The second protruding portion 73a protrudes forward from the upper end edge of the ring portion 71 and extends in the circumferential direction of the cap. In the illustrated example, the central angle of the second protruding portion 73a with respect to the axis O4 is set to 90° or less.

[0046] The second standing portion 73b extends upward from the front end edge of the second protruding portion 73a. The second standing portion 73b extends following the front end edge of the second standing portion 73b. The second standing portion 73b faces the lower end of the mounting tube 46 with a gap therebetween in the vertical direction. An engagement protrusion 73d is formed on the outer circumferential surface of the second standing portion 73b.

[0047] As the stopper 8 moves from the locked position to the unlocked position, the second upright portion 73b enters the slit 65. At the unlocked position shown in Fig. 3, the engagement protrusion 73d engages with the upper opening edge of the slit 65 from above.

[0048] 1, the positioning rib 73c protrudes upward from one end of the second upright portion 73b in the circumferential direction of the cap. When the stopper 8 is in the locked position, the positioning rib 73c is in close proximity to or in contact with the mounting tube 46 from the other circumferential direction of the cap. On the other hand, the upper edge of the positioning rib 73c is located above the lower edge of the positioning rib 67 and below the upper edge of the slit 65. Therefore, when the stopper 8 is in the unlocked position shown in Figures 3 and 5, the positioning rib 73c approaches or abuts against the positioning rib 67 from the other circumferential side. That is, in the unlocked position, the positioning rib 73c abuts against the positioning rib 67 from the other circumferential side, thereby restricting the rotation of the stopper 8 relative to the ejector main body 4 to one side in the circumferential direction.

[0049] 1 and 2, the arm portion 74 extends in a cantilever manner forward from a position of the ring portion 71 where the arm portion 74 circumferentially overlaps with the first engagement portion 72. The width of the arm portion 74 in the left-right direction L2 gradually decreases as the arm portion 74 extends forward.

[0050] The restricting portion 75 extends forward from the arm portion 74. The restricting portion 75 is formed in a C-shape opening toward one side in the left-right direction L2 in a plan view. When the stopper 8 is in the lock position, the restricting portion 75 is fitted into the middle portion of the trigger portion 40 in the up-down direction from one side in the cap circumferential direction. When the stopper 8 is in the unlocked position shown in Figs. 3 and 5, the restricting portion 75 is retracted from the trigger portion 40. When the stopper 8 is in the lock position shown in Fig. 1, the trigger portion 40 abuts against the inner surface of the restricting portion 75 in the front-rear direction L1, so that the movement of the trigger portion 40 in both the front-rear direction L1 is restricted. Specifically, the inner surface of the restricting portion 75 facing forward constitutes a rear restricting surface 75a that can abut against the rear end edge of the trigger portion 40 from the rear of the trigger portion 40. The inner surface of the restricting portion 75 facing rearward constitutes a front restricting surface 75b that can come into contact with the front end surface of the trigger portion 40 from the front of the trigger portion 40.

[0051] In this embodiment, when the stopper 8 is in the locked position, the inner surface of the restricting portion 75 abuts against the trigger portion 40 from one side in the cap circumferential direction, thereby restricting the rotation of the stopper 8 to the other side in the circumferential direction relative to the ejector body 4. Note that the restricting portion 75 does not necessarily need to be fitted into the trigger portion 40 in the locked position, and it is sufficient that the restricting portion 75 abuts against the trigger portion 40 so as to restrict at least the rearward movement of the trigger portion 40.

[0052] In the illustrated example, a protrusion 81 protruding rearward is formed on a portion of the trigger 40 that is located below the restricting portion 75. When the stopper 8 is in the locked position, the protrusion 81 engages with the lower edge of the restricting portion 75 from below.

[0053] Next, a description will be given of the operation of the above-mentioned trigger-type liquid ejector 1. In the following description, a state in which the stopper 8 is in the locked position will be described as an initial state. First, as shown in Fig. 1 to Fig. 3, the stopper 8 is moved to the unlocked position. Specifically, the stopper 8 is rotated toward one side in the circumferential direction via the ring portion 71, the arm portion 74, etc. Then, as shown in Fig. 3 to Fig. 5, the stopper 8 rotates in the cap circumferential direction relative to the ejector main body 4 and the mounting cap 7, so that the restricting portion 75 retreats from the trigger portion 40. This allows the trigger portion 40 to move backward.

[0054] In the process of the stopper 8 moving to the unlocked position, the engagement parts 72, 73 move around the vertical supply tube part 10 (large diameter part 10c) in the cap circumferential direction. As a result, the first engagement part 72 (first standing part 72b) comes out of the slit 65 through one opening of the slit 65 in the cap circumferential direction. As a result, the engagement between the first engagement part 72 and the cover 2 is released. Therefore, the stopper 8 becomes rotatable with a rattle between the cover 2 and the mounting cap 7. When the stopper 8 further rotates toward the unlocked position, the second engagement part 73 (second standing part 73b) enters the slit 65 through the other opening of the slit 65 in the cap circumferential direction. In this embodiment, as shown in FIG. 3 and FIG. 5, when the stopper 8 rotates about 180° in the circumferential direction relative to the locked position, the positioning ribs 67, 73c come into contact with each other in the circumferential direction. As a result, the stopper 8 is held in the unlocked position.

[0055] 1 and 3, in order to spray liquid in the trigger type liquid sprayer 1, a finger is hooked on the trigger portion 40 while wrapping a hand around the mounting cap 7. In this embodiment, when the stopper 8 is in the unlocked position, the arm portion 74 and the like are in a state of protruding rearward from the upper end portion of the mounting cap 7. Therefore, when the trigger type liquid sprayer 1 is gripped, the part of the back of the hand located between the thumb and index finger approaches or abuts against the arm portion 74 and the like from below. This allows the trigger type liquid sprayer 1 to be gripped stably, making it easier to perform the spraying operation.

[0056] With the trigger-type liquid ejector 1 being gripped, the trigger portion 40 is pulled backward. This causes the main piston 42 to move backward from the front end position, and pressure is applied inside the main cylinder 41. This causes the liquid in the main cylinder 41 to be supplied into the vertical supply tube portion 10 (small diameter portion 10a) through the communicating tube 41a. The liquid supplied into the vertical supply tube portion 10 then 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 10g, with the ball valve 21 in contact with the lower valve seat portion 10f.

[0057] Then, the liquid in the vertical supply tube portion 10 is supplied into the storage cylinder 31 through the connecting tube 11 and the supply hole 31c. 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 backward against the biasing force of the biasing member 33. As a result, the liquid is stored in the storage cylinder 31.

[0058] As the storage plunger 32 moves backward, the blocking wall 32a separates from the front wall portion 31a of the storage cylinder 31 backward, and the communication port 31d is opened. As a result, the liquid stored in the storage cylinder 31 passes through the injection tube portion 13 through the communication port 31d, and is then ejected to the outside through the ejection hole 5. When the operation of the trigger portion 40 is released, the main piston 42 moves forward in the main cylinder 41 due to the biasing force of the biasing member 43, and the trigger portion 40 also moves forward in the restoration state. As a result, the pressure in the main cylinder 41 is reduced. Then, the ball valve 21 floats up from the lower valve seat portion 10f, and the inside of the container body A and the main cylinder 41 communicate with each other through the small diameter portion 10a. On the other hand, the storage valve 26 maintains a state of being seated on the upper valve seat portion 10g, and communication between the inside of the main cylinder 41 and the inside of the storage cylinder 31 through the small diameter portion 10a is blocked. 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 through the communication tube 41a, thereby making it possible to prepare for the next trigger operation.

[0059] In a configuration including the storage pump section 12 as in this embodiment, every time the trigger section 40 is operated, a portion of the liquid supplied from the main cylinder 41 is ejected through the ejection hole 5, and a portion of the liquid is stored in the storage cylinder 31. Therefore, when the operation of the trigger section 40 is stopped, the supply of liquid to the storage cylinder 31 stops, but the storage plunger 32 moves forward due to the biasing force of the biasing member 33, so that the liquid stored in the storage cylinder 31 is continuously supplied to the injection tube section 13. This allows the liquid to be continuously ejected through the ejection hole 5.

[0060] After the ejection operation is completed, the stopper 8 is moved toward the lock position. Specifically, as shown in Figs. 1 to 4, the stopper 8 is rotated toward the other side in the cap circumferential direction via the ring portion 71, the arm portion 74, etc. Then, the stopper 8 rotates in the cap circumferential direction relative to the ejector body 4 and the mounting cap 7, so that the second engagement portion 73 (the second standing portion 73b) comes out of the slit 65 through the other side opening of the slit 65 in the cap circumferential direction. Therefore, the stopper 8 becomes rotatable with a rattle between the cover 2 and the mounting cap 7. When the stopper 8 further rotates toward the lock position, the first engagement portion 72 (the first standing portion 72b) enters the slit 65 through the one side opening of the slit 65 in the cap circumferential direction. In this embodiment, when the stopper 8 rotates about 180° in the cap circumferential direction relative to the unlock position, the restricting portion 75 fits into the trigger portion 40 from one side in the cap circumferential direction. As a result, the movement of the trigger portion 40 in both the front-rear direction L1 is restricted by the restricting portion 75, and the rotation of the stopper 8 in the other circumferential direction of the cap is restricted.

[0061] In this manner, in this embodiment, the ejector main body 4 is provided with a stopper 8 that is rotatable with a gap between it and the mounting cap 7 between the locked position and the unlocked position. According to this configuration, when the stopper 8 is in the locked position, by restricting the operation of the trigger portion 40 itself, it is possible to prevent liquid from being supplied into the vertical supply tube portion 10 in the locked position, unlike the case where the ejection of liquid is controlled by, for example, rotating the nozzle member. Therefore, it is possible to prevent the liquid in the vertical supply tube portion 10, etc. from being pressurized while the stopper 8 is in the locked position. As a result, it is possible to prevent unexpected ejection of liquid when the stopper 8 is moved to the unlocked position. In particular, in this embodiment, since the stopper 8 is configured to be rotatable with a gap between it and the attachment cap 7, it is possible to prevent the stopper 8 from rotating together with the attachment cap 7, for example, when attaching or detaching the attachment cap 7 to or from the container body A. This makes it possible to prevent the stopper 8 from unexpectedly moving to the unlocked position.

[0062] In the trigger-type liquid ejector 1 of this embodiment, the ejector body 4 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, as described above, when the stopper 8 is in the locked position, the operation of the trigger portion 40 itself is restricted, thereby making it possible to prevent liquid from being unexpectedly stored in the storage cylinder 31. Therefore, it is possible to prevent the liquid from unexpectedly spouting out when the stopper 8 is moved to the unlocked position.

[0063] In the trigger type liquid ejector 1 of this embodiment, the stopper 8 is configured to be disposed between the main cylinder 41 and the mounting cap 7 in the vertical direction. This configuration improves space efficiency compared to a configuration in which the stopper 8 is positioned on the outside in the vertical direction relative to the ejector body 4 and the mounting cap 7, thereby making it possible to reduce the size of the trigger-type liquid ejector 1 in the vertical direction.

[0064] In the trigger-type liquid ejector 1 of this embodiment, the stopper 8 is configured to include a rear regulating surface 75a that abuts against the trigger portion 40 from the rear of the trigger portion 40 in the locked position to regulate the rearward movement of the trigger portion 40, and a front regulating surface 75b that abuts against the trigger portion 40 from the front of the trigger portion 40 in the locked position to regulate the forward movement of the trigger portion 40. According to this configuration, when the stopper 8 is in the locked position, the rearward movement of the trigger portion 40 is restricted by the rear restriction surface 75a. In particular, in this embodiment, since the stopper 8 is provided with the front restriction surface 75b, the forward movement of the trigger portion 40 can also be restricted when the stopper 8 is in the locked position. This makes it possible to suppress the movement of the main piston 42 accompanying an increase in pressure inside the container body A, for example, when the stopper 8 is in the locked position.

[0065] Second embodiment The second embodiment differs from the above-described first embodiment in that a stopper 100 is rotatably supported by the ejection mechanism 3 of the ejector main body 4. In the trigger-type liquid ejector 1 shown in Fig. 6, a locking piece 101 is formed in the vertical middle part of the lower storage part 61. The locking piece 101 protrudes forward in a cantilever manner from the inner surface of the lower storage part 61. The locking piece 101 of the cover 2 is locked to a locking piece 10h of the ejection mechanism 3 in the front-rear direction L1. A jumping-over rib 105 is formed in the rear end part of the lower storage part 61. The jumping-over rib 105 protrudes downward from the lower end edge of the lower storage part 61.

[0066] The vertical supply tube 10 has an upper flange portion 10k at a portion of the large diameter portion 10c located above the mounting cap 7. The upper flange portion 10k protrudes outward in the cap radial direction from the large diameter portion 10c. The outer diameter of the upper flange portion 10k is larger than the outer diameter of the mounting cap 7. A guide portion 10m is formed on the outer periphery of the upper flange portion 10k. The guide portion 10m protrudes downward from the upper flange portion 10k. The guide portion 10m extends in an annular shape around the entire circumference of the upper flange portion 10k.

[0067] The stopper 100 is disposed between the main pump portion 14 and the mounting cap 7 in the vertical direction. The stopper 100 is rotatably supported by the vertical supply tube portion 10. Specifically, the stopper 100 includes a ring portion 110, a rotation support portion 111, and a restriction portion 112. The ring portion 110 surrounds the periphery of the large diameter portion 10c. The ring portion 110 is formed with an engagement protrusion 110a that protrudes inward in the cap radial direction. The engagement protrusion 110a engages with the outer periphery of the upper flange portion 10k from above. The rear end portion of the ring portion 110 is formed with a first positioning recess 115 that protrudes upward. The first positioning recess 115 engages with the jumping rib 105 when the stopper 100 is in the locked position. This restricts the rotation of the stopper 100 relative to the ejector body 4 in the locked position. On the other hand, the front end portion of the ring portion 110 is formed with a second positioning recess 116 that protrudes upward. The second positioning recess 116 engages with the jumping rib 105 when the stopper 100 is in the unlocked position shown in FIG. 7. This restricts the rotation of the stopper 100 relative to the ejector body 4 in the unlocked position.

[0068] The rotation support portion 111 protrudes from the lower end of the ring portion 110 toward the inside in the cap radial direction. The rotation support portion 111 engages with the guide portion 10m from the inside in the cap radial direction. The rotation support portion 111 faces the tapered surface 7a of the mounting cap 7 with a gap therebetween. The stopper 100 is rotatably supported by the vertical supply tube portion 10 with the engagement projection 110a engaged with the upper flange portion 10k and the rotation support portion 111 engaged with the guide portion 10m.

[0069] The restricting portion 112 protrudes forward from the ring portion 110. When the stopper 100 is in the locked position, the restricting portion 112 approaches or abuts against the trigger portion 40 from the rear. This restricts the rearward movement of the trigger portion 40. On the other hand, in the unlocked position shown in FIG. 7, the restricting portion 112 retracts from the trigger portion 40. This allows the stopper 100 to allow the rearward movement of the trigger portion 40.

[0070] In the trigger type liquid ejector 1 of this embodiment, in order to move the stopper 100 from the locked position to the unlocked position, the stopper 100 is pushed, for example, toward one side in the circumferential direction via the restricting portion 112 or the like. Then, the first positioning recess 115 overcomes the overriding rib 105, and the stopper 100 rotates relative to the ejector body 4 and the mounting cap 7. Then, the restricting portion 112 retreats from the rear of the trigger portion 40 in the cap circumferential direction, allowing the trigger portion 40 to move backward. Note that, as shown in FIG. 7, by rotating the stopper 100 to a position where the restricting portion 112 faces backward, the second positioning recess 116 engages with the overriding rib 105. As a result, the stopper 100 is held in the unlocked position.

[0071] After the ejection operation is completed, in order to return the stopper 100 from the unlocked position to the locked position, the stopper 100 is pushed, for example, toward one side in the circumferential direction via the restricting portion 112 or the like. Then, the second positioning recess 116 overcomes the overstepping rib 105, and the stopper 100 rotates relative to the ejector body 4 and the mounting cap 7. Then, as shown in FIG. 6, the stopper 100 is rotated to a position where the restricting portion 112 faces forward, and the stopper 100 reaches the locked position. At the locked position, the restricting portion 112 enters the rear of the trigger portion 40, thereby restricting the rearward movement of the trigger portion 40. At the locked position, the first positioning recess 115 engages with the overstepping rib 105, and the stopper 100 is held at the unlocked position.

[0072] In this embodiment, since the stopper 100 is supported by the vertical supply tube portion 10 around the entire circumference, a gap is always secured between the stopper 100 and the mounting cap 7. Therefore, when the stopper 100 is rotated in a state in which the trigger-type liquid ejector 1 is attached to the container body A, the mounting cap 7 can be prevented from rotating in association with the rotation of the stopper 100.

[0073] 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 without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the scope of the attached claims. In the above embodiment, the trigger type liquid jetter 1 is configured to include the storage pump section 12, but is not limited to this configuration. The trigger type liquid jetter 1 according to the present invention may be configured such that the liquid delivered from the main pump section 14 is jetted without being stored. In the above-described embodiment, the stopper is supported by the cover 2 or the vertical supply tube portion 10, but the present invention is not limited to this configuration. The stopper may be supported by any of the members constituting the ejector body 4.

[0074] In the above embodiment, the stopper is disposed between the main pump portion 14 and the mounting cap 7, but the present invention is not limited to this configuration. The stopper can be disposed at any position in the vertical direction. In the above embodiment, the trigger portion 40 moves in the front-rear direction L1 by rotating, but the present invention is not limited to this configuration. The trigger portion 40 may be configured to slide in the front-rear direction L1.

[0075] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0076] 1: Trigger-type liquid ejector 4: Squirt body 5:Blowout hole 6: Nozzle material 7: Mounting cap 8: Stopper 10: Vertical supply tube 15: Trigger mechanism 31: Storage cylinder 32: Storage plunger 33: Pressing member 40: Trigger section 41: Main cylinder 42: Main piston 43: Pressing member 75a: Rear control surface 75b: Front control surface 100: Stopper A: Container body A1: Mouth

Claims

1. An attachment cap that is detachably attached to the mouth of the container body by a rotation operation about an axis extending in the vertical direction; an ejector body attached to the container body via the mounting cap; a nozzle member provided at a front end of the ejector body and having an ejection hole for ejecting liquid forward; The ejector body includes: A vertical supply tube portion that extends in a vertical direction and sucks up the liquid in the container body; a trigger mechanism including a trigger portion disposed in front of the vertical supply tube portion so as to be movable rearward in a forward biased state, the trigger portion moving rearward to cause liquid to flow from inside the vertical supply tube portion toward the nozzle hole, The trigger-type liquid ejector has a stopper that can rotate around the axis relative to the ejector body and the mounting cap, with a gap between the ejector body and the mounting cap, between a locked position that restricts the rearward movement of the trigger portion and an unlocked position that allows the rearward movement of the trigger portion.

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 as described in claim 1, further comprising: a storage plunger that is arranged in the storage cylinder so as to be movable in a first axial direction along the central axis of the storage cylinder, and that moves toward one side of the first axial direction as liquid is supplied into the storage cylinder and is biased toward the other side of the first axial direction.

3. The trigger mechanism includes: A main cylinder communicating with the vertical supply tube portion; A main piston that moves in a front-rear direction in the main cylinder in accordance with the movement of the trigger portion and pressurizes and depressurizes the main cylinder; a biasing member that biases the main piston forward, 3. The trigger type liquid ejector according to claim 1, wherein the stopper is disposed between the main cylinder and the mounting cap in the vertical direction.

4. The stopper is a rear restriction surface that abuts against the trigger portion from a rear side of the trigger portion in the locked position to restrict rearward movement of the trigger portion; 4. The trigger-type liquid ejector according to claim 1, further comprising a front restriction surface that abuts against the trigger portion from the front in the locked position to restrict forward movement of the trigger portion.

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