JP7576995B2 - Trigger-type liquid ejector - Google Patents

Description

The present invention relates to a trigger-type liquid ejector.

Conventionally, a trigger-type liquid ejector has been known that has a vertical supply tube section that extends in the vertical direction and sucks up liquid within a 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 a trigger mechanism that causes liquid to flow from within the vertical supply tube section toward the ejection hole side by moving the trigger section rearward.
For example, Patent Document 1 listed below discloses a configuration in which a connecting member provided on the trigger portion is slid up and down to switch between a transmitted and non-transmitted state of a pressing force to a piston caused by the forward and backward movement of the trigger portion.

JP 2020-50423 A

However, the above-mentioned conventional technology still has room for improvement in terms of suppressing the unexpected ejection of liquid while providing excellent operability. That is, in conventional trigger-type liquid ejectors, the connecting member is provided behind the trigger portion. Therefore, when ejecting liquid, the operation portion provided on the side of the trigger portion is first grasped to operate the connecting member, and the trigger portion and the piston are placed in a transmission state by the connecting member. Next, the trigger portion is grasped from the front and pulled backward. Thus, in conventional trigger-type liquid ejectors, an operation separate from the operation of grasping the trigger portion is required to eject liquid, and there is a problem in that the liquid ejection operation is cumbersome.

The present invention provides a trigger-type liquid ejector that can suppress unexpected ejection of liquid while providing excellent operability.

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 a ejector body that is attached to a container body containing liquid, and a nozzle member that is attached to the front end of the ejector body and has an ejection hole formed therein through which liquid is ejected forward. 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 the trigger mechanism causes liquid to flow from within the vertical supply tube section toward the ejection hole by the rearward movement of the trigger section, and a stopper that is arranged on the trigger section and can move between a restricting position that restricts the rearward movement of the trigger section and an allowing position that allows the rearward movement of the trigger section. The stopper protrudes forward relative to the trigger section and has an operating section that can operate the stopper.

According to this aspect, since the operating part protrudes forward relative to the trigger part, the operating part can be operated with a finger or the like hooked on the trigger part during the liquid ejection operation. In other words, the stopper can be moved to the permissible position during the series of ejection operations in which a finger or the like is hooked on the trigger part and the trigger part is moved rearward. Therefore, compared to the conventional configuration in which the connecting member and the piston are in a transmission state before the trigger part is grasped, it is possible to suppress unexpected ejection of liquid and to exhibit excellent operability.

In the trigger-type liquid ejector of the above aspect, it is preferable that a biasing member is disposed between the stopper and the trigger portion, for biasing the stopper toward the regulating position.
According to this aspect, the stopper returns to the regulating position by releasing the operating force on the stopper via the operating part, which makes it possible to prevent the stopper from being forgotten to be returned to the regulating position after the ejection operation is completed, and makes it possible to more reliably prevent the liquid from being ejected unexpectedly.

In the trigger-type liquid ejector of the above-mentioned aspect, it is preferable that the trigger mechanism comprises a piston that moves back and forth in conjunction with the movement of the trigger portion, and a cylinder portion into which the piston is inserted and whose interior is connected to the vertical supply tube portion, and that the stopper comprises a regulating portion that approaches or abuts the cylinder portion from the front in the regulating position.
According to this aspect, the stopper (the restricting portion) abuts against the cylinder portion, thereby restricting the rearward movement of the trigger portion. Therefore, in the restricting position, the inside of the cylinder portion is prevented from being pressurized by the piston, and the liquid can be prevented from being unexpectedly ejected.

In the trigger-type liquid ejector of the above aspect, the trigger portion and the stopper are each configured to be rotatable around an axis extending in the left-right direction that intersects the front-to-back direction when viewed from the top-to-bottom direction, and it is preferable that the stopper moves from the restrictive position to the permissive position as the operating portion moves rearward.
According to this aspect, both the trigger and the stopper can be operated by a rotation operation. In particular, since the operation part is moved rearward to move the stopper to the allowable position, the liquid can be ejected by pulling the trigger rearward following the rotation operation to move the stopper to the allowable position. This can further improve operability.

In the trigger-type liquid ejector of the above-mentioned aspect, it is preferable that the nozzle member is rotatable about an axis extending in the forward/backward direction relative to the ejector body between an engagement position that restricts movement of the stopper from the restricting position to the permissible position, and a disengagement position that permits movement of the stopper from the restricting position to the permissible position.
According to this aspect, the movement of the stopper itself to the permitted position can be restricted by the nozzle member, which makes it possible to more reliably prevent the liquid from being unexpectedly ejected.

The present invention makes it possible to suppress the unexpected ejection of liquid while providing excellent operability.

1 is a cross-sectional view of a trigger type liquid ejector according to a first embodiment. 1 is a cross-sectional view of a trigger type liquid ejector according to a first embodiment. 1 is a cross-sectional view of a trigger type liquid ejector according to a first embodiment. 11 is a cross-sectional view of a trigger type liquid ejector according to a second embodiment. 11 is a cross-sectional view of a trigger type liquid ejector according to a second embodiment. 13 is a cross-sectional view of a trigger type liquid ejector according to a third embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiments and modifications described below, the same reference numerals are used to designate corresponding configurations, and the description thereof may be omitted.
First Embodiment
As shown in FIG. 1, the trigger-type liquid sprayer 1 comprises a sprayer body 20 which is attached to a container body A containing a liquid such as a disinfectant, and a nozzle member 19 which is attached to the sprayer body 20.
Unless otherwise specified, each component part of the trigger type liquid ejector 1 is a molded product made of synthetic resin.

The ejector main body 20 has a vertical supply tube portion 10 , a normal/inverted adapter 14 , a pipe 15 , an ejection tube portion 11 , a trigger mechanism T, and a stopper module 100 .
Hereinafter, the direction along the central axis O1 of the vertical supply tube portion 10 is referred to as the vertical direction, and the bottom (not shown) side of the container body A along the vertical direction is referred to as the lower side, and the opposite side is referred to as the upper side. When viewed from the vertical direction, the side where the nozzle member 19 is located with respect to the vertical supply tube portion 10 is referred to as the front side, and the opposite side is referred to as the rear side. When viewed from the vertical direction, the direction perpendicular to the front-rear direction is referred to as the left-right direction.

The vertical supply tube 10 sucks up the liquid in the container A through the mouth A1 of the container A. The vertical supply tube 10 includes a topped outer tube 12 and an inner tube 13 fitted into the outer tube 12.

The outer tube 12 comprises a large diameter portion 12a, a small diameter portion 12b arranged above the large diameter portion 12a and having a smaller diameter than the large diameter portion 12a, and an upper flange portion 12c connecting the upper end of the large diameter portion 12a and the lower end of the small diameter portion 12b.
The upper end opening of the small diameter portion 12b is closed by a top wall portion 12d.

The inner cylinder 13 includes a large diameter portion 13a, a small diameter portion 13b having a smaller diameter than the large diameter portion 13a, and a lower flange portion 13c connecting an upper end portion of the large diameter portion 13a and the small diameter portion 13b.
The large diameter portion 13a is fitted into the large diameter portion 12a of the outer cylinder 12, and the small diameter portion 13b is fitted into the small diameter portion 12b of the outer cylinder 12. The upper end of the small diameter portion 13b is located higher than the upper end of the large diameter portion 13a. The lower end of the small diameter portion 13b is located higher than the lower end of the large diameter portion 13a and lower than the lower end of the small diameter portion 12b of the outer cylinder 12.

The lower flange portion 13c is located below the upper flange portion 12c of the outer tube 12 and above the lower end of the large diameter portion 12a of the outer tube 12. A vertical gap S1 is provided between the lower flange portion 13c and the upper flange portion 12a. The lower flange portion 13c protrudes radially outward from a portion of the outer peripheral surface of the small diameter portion 13b that protrudes downward from the small diameter portion 12b of the outer tube 12, and extends continuously over the entire circumferential length.

The large diameter portion 13a of the inner cylinder 13 is formed with a ring-shaped flange portion 13d that protrudes radially outward from the portion that protrudes downward from the large diameter portion 12a of the outer cylinder 12. The flange portion 13d is provided within the upper end portion of the attachment cap 21 that is attached (e.g., screwed) to the mouth portion A1 of the container body A, and is rotatably engaged with the upper end portion of the attachment cap 21 around the central axis O1. The flange portion 13d is sandwiched vertically between the attachment cap 21 and the upper end opening edge of the mouth portion A1. The attachment cap 21 is screwed to the mouth portion A1, and removably fixes the trigger-type liquid ejector 1 to the container body A. The central axis O1 of the vertical supply tube portion 10 is located rearward of the container axis of the container body A.

A jet valve 30 is provided within the upper end of the inner cylinder 13 so as to be elastically deformable in the vertical direction.
The jet valve 30 is in close contact with a valve seat 32 formed in a stepped shape on the inner peripheral surface of the inner cylinder 13 while being biased downward from above. The jet valve 30 blocks communication between a space located above the valve seat 32 and a space located below the valve seat 32 within the inner cylinder 13. The jet valve 30 rises against the downward biasing force and moves away from the valve seat 32, thereby connecting the space located above the valve seat 32 and the space located below the valve seat 32 within the inner cylinder 13.

A ring-shaped tapered tube section 35 that protrudes inward is formed on the inner peripheral surface of the inner tube 13, at a portion that is located below the valve seat 32 and above the upper end of the pipe 15. The diameter of the tapered tube section 35 decreases as it extends downward. A ball valve 36 that is releasably seated on the inner peripheral surface of the tapered tube section 35 is disposed inside the tapered tube section 35.

The ball valve 36 blocks communication between the space located above the tapered tube portion 35 and the space located below the tapered tube portion 35 in the inner tube 13. The ball valve 36 rises relative to the tapered tube portion 35 and moves away from the inner peripheral surface of the tapered tube portion 35, thereby connecting the space located above the tapered tube portion 35 and the space located below the tapered tube portion 35 in the inner tube 13.

The upright/inverted adapter 14 is attached to the lower end of the vertical supply tube 10. The upright/inverted adapter 14 enables the liquid in the container A to be ejected whether the container A is in the upright position (with the mouth A1 facing upward) or the inverted position (with the mouth A1 facing downward).

The inverted normal adaptor 14 includes an adaptor body 14a and a switching valve 14b.
The adaptor body 14a is formed in a hollow cylindrical shape. The adaptor body 14a is fitted into the large diameter portion 13a from below. A first space Q1 and a second space Q2 are formed in the adaptor body 14a. The first space Q1 communicates with the inside of the container body A and the inside of the vertical supply tube portion 10 through an upright inlet 14c formed in the adaptor body 14a. The second space Q2 communicates with the inside of the container body A and the inside of the vertical supply tube portion 10 through an inverted inlet 14d formed in the adaptor body 14a. The first space Q1 and the second space Q2 communicate with each other through a communication portion 14f in the adaptor body 14a.

The switching valve 14b switches between communication and blocking between the first space Q1 and the second space Q2 through the communication portion 14f. The switching valve 14b is, for example, a ball valve. That is, the switching valve 14b is provided so as to be movable within the second space Q2 by its own weight or the like. When the container body A is in an upright position, the switching valve 14b sits on the communication portion 14f to block communication between the first space Q1 and the second space Q2. When the container body A is in an inverted position, the switching valve 14b moves away from the communication portion 14f to connect the first space Q1 and the second space Q2.

The pipe 15 is attached to the adapter body 14a from below. The pipe 15 extends downward inside the container body A. The pipe 15 connects the inside of the container body A to the first space Q1 through the upright inlet 14c.

The ejector main body 20 includes an ejection tube portion 11 provided in front of the vertical supply tube portion 10. The ejection tube portion 11 causes the liquid in the vertical supply tube portion 10 to flow toward an ejection hole 18 side, which will be described later.
The injection tube portion 11 extends forward from the upper end of the vertical supply tube portion 10. The interior of the injection tube portion 11 communicates with the interior of the vertical supply tube portion 10 through a first horizontal hole 16 that is formed integrally with the outer tube 12 and the inner tube 13 and passes through in the front-rear direction. The first horizontal hole 16 opens into a space located above the valve seat 32 within the inner tube 13.

A cylinder mounting tube 40 that protrudes forward is formed in a portion of the outer tube 12 that is located below the injection tube portion 11. The cylinder mounting tube 40 is formed in a horizontally oriented cylindrical shape with a closed rear end opening. The lower end of the cylinder mounting tube 40 is formed integrally with the upper flange portion 12c of the outer tube 12.

The trigger mechanism T causes liquid to flow from inside the vertical supply tube 10 through the injection tube 11 toward the ejection hole 18 by the rearward movement of the trigger part 51. The trigger mechanism T includes a trigger part 51 that is provided in front of the vertical supply tube 10 and can move rearward in a forward biased state, a piston 52 that moves back and forth in conjunction with the movement of the trigger part 51, and a cylinder 53 into which the piston 52 is inserted and whose interior is connected to the inside of the vertical supply tube 10.

The trigger portion 51 extends downward from the injection tube portion 11 and then forward. The upper end of the trigger portion 51 is supported by the ejector body 20 (upper plate member 84 described later) so as to be rotatable about an axis along the left-right direction. An upper guide tube 51a and a lower guide tube 51b are formed in the trigger portion 51. The upper guide tube 51a extends rearward from the front wall of the trigger portion 51 at the top of the trigger portion 51. The lower guide tube 51b extends rearward from the front wall of the trigger portion 51 at a portion of the trigger portion 51 located below the upper guide tube 51a. Each guide tube 51a, 51b is formed, for example, in a rectangular tube shape.

The cylinder 53 is formed in a horizontally oriented cylindrical shape with a closed rear end opening, and is fitted into the cylinder mounting tube 40. A restricting protrusion 53b that protrudes forward from the peripheral wall portion 53a is formed on the lower end of the peripheral wall portion 53a of the cylinder 53. The restricting protrusion 53b is formed in an arc shape that includes the lower end of the peripheral wall portion 53a and extends along the peripheral wall portion 53a in a front view from the front-rear direction. However, the dimensions of the peripheral wall portion 53a in a front view and the amount of protrusion from the peripheral wall portion 53a in the front-rear direction can be changed as appropriate. The cylinder mounting tube 40 and the cylinder 53 constitute the cylinder portion in this embodiment.

The piston 52 is formed in a horizontally oriented cylindrical shape with a closed front end opening, and is fitted into the cylinder 53 so as to be movable back and forth. The front end wall 52a of the piston 52 enters the upper guide tube 51a from the rear of the upper guide tube 51a. The front end wall 52a is connected to the trigger portion 51 inside the upper guide tube 51a. The piston 52 is urged forward together with the trigger portion 51 by an elastic plate portion 54 (described later), and moves rearward as the trigger portion 51 moves rearward and is pushed into the cylinder 53.

The outer peripheral surface of the cylinder 53 and the inner peripheral surface of the cylinder mounting tube 40 are in close contact with each other at both ends in the front-rear direction. An annular gap S2 is provided in the intermediate portion between the outer peripheral surface of the cylinder 53 and the inner peripheral surface of the cylinder mounting tube 40, the intermediate portion being located between the both ends in the front-rear direction.
A first vent hole 63 is formed in the cylinder 53, which communicates the inside of the cylinder 53 with the gap S2. A second vent hole 64 is formed in the upper flange portion 12c of the outer tube 12, which communicates the gap S2 with a gap S1 between the upper flange portion 12c and the lower flange portion 13c of the inner tube 13. A third vent hole 65 is formed in the lower flange portion 13c, which communicates the gap S1 with the inside of the large diameter portion 13a of the inner tube 13 (the inside of the container body A).

When the trigger part 51 is in the forwardmost position, the piston 52 closes the first air hole 63. When the piston 52 moves rearward a predetermined amount due to the rearward movement of the trigger part 51, the first air hole 63 is opened. As a result, the inside of the container body A is connected to the outside through the third air hole 65, the gap S1, the second air hole 64, the gap S2, and the first air hole 63.

A second horizontal hole 17 is formed integrally with the rear end wall of the cylinder 53, which closes the rear end opening, and the vertical supply tube portion 10, penetrating in the front-rear direction and communicating the inside of the cylinder 53 with the inside of the small diameter portion 13b of the inner tube 13. The second horizontal hole 17 opens into a space located below the valve seat 32 and above the tapered tube portion 35 within the inner tube 13.
As described above, the ejection valve 30 switches between communication and blocking between the inside of the injection tube section 11 and the inside of the cylinder 53 through the vertical supply tube section 10, and the ball valve 36 switches between communication and blocking between the inside of the container body A and the inside of the cylinder 53 through the vertical supply tube section 10.

A flat upper plate member 84 connected to the top wall portion 12d of the outer cylinder 12 in the vertical supply cylinder portion 10 is attached to the upper surface of the injection cylinder portion 11. The upper plate member 84 rotatably supports the upper end portion of the trigger portion 51.
Elastic plate portions 54 are formed on both left and right ends of upper plate member 84, and have a forward-protruding arc shape in a side view from the left and right direction, and extend below injection tube portion 11. A locking piece that protrudes downward is formed on the lower end of elastic plate portion 54, and this locking piece is locked to trigger portion 51 from above. In this way, elastic plate portion 54 urges trigger portion 51 forward.

The ejector body 20 includes a relay member 22 that is assembled to the ejection tube portion 11 from the front.
The relay member 22 comprises a partition 90 covering the front end opening of the injection tube portion 11 from the front, an outer fitting tube portion 91 extending rearward from the partition 90 and fitted onto the injection tube portion 11, a first mounting tube portion 92 extending forward from the partition 90 and having a nozzle member 19 attached thereto, and a guide shaft portion 94 extending forward from a portion of the partition 90 located inside the first mounting tube portion 92.

A communication hole 95 that communicates with the inside of the injection tube portion 11 is formed in the partition wall 90 at a portion located inside the first mounting tube portion 92 .
A first switching groove 94a extending in the front-rear direction and opening forward is formed on the outer circumferential surface of the front end of the guide shaft portion 94. The guide shaft portion 94 is disposed coaxially with the first mounting tube portion 92.

The nozzle member 19 is attached to the front end of the ejector body 20 and has an ejection hole 18 for ejecting liquid forward.
The nozzle member 19 is attached to the relay member 22 via the first mounting tube portion 92, and is thereby combined with the relay member 22 from the front. The nozzle member 19 is attached to the relay member 22 so as to be rotatable around the axis O2 of the guide shaft portion 94.

The nozzle member 19 includes a second mounting cylinder portion 24 rotatably fitted onto the first mounting cylinder portion 92, and a fitting cylinder portion 23 that is provided inside the second mounting cylinder portion 24 and rotatably fitted onto the guide shaft portion 94. The second mounting cylinder portion 24 and the fitting cylinder portion 23 are coaxially arranged.
The inner peripheral surface of the fitting tube portion 23 is formed with a second switching groove 23a that extends in the front-rear direction and opens rearward. The second switching groove 23a is connected to the inside of the first mounting tube portion 92. The second switching groove 23a is disposed in correspondence with the first switching groove 94a of the guide shaft portion 94. The front end of the second switching groove 23a and the rear end of the first switching groove 94a are located at the same positions in the front-rear direction. The second switching groove 23a is connected to the first switching groove 94a depending on the rotational position of the nozzle member 19 relative to the relay member 22. That is, the nozzle member 19 is configured to be rotatable between a communication position where the first switching groove 94a and the second switching groove 23a communicate with each other, and a blocking position where the communication between the first switching groove 94a and the second switching groove 23a is blocked. In the communication position, the first switching groove 94a communicates with the second switching groove 23a through the front end portion. As a result, the inside of the injection tube portion 11 communicates with the ejection hole 18 through the first switching groove 94a and the second switching groove 23a. On the other hand, in the blocking position, the first switching groove 94a is blocked by the fitting tube portion 23, blocking the communication between the inside of the injection tube portion 11 and the ejection hole 18.

The nozzle member 19 includes a nozzle cylinder 31 and an outer cylinder 33 .
The nozzle cylinder 31 has an ejection cylinder 27 extending in the front-rear direction, and a closing wall 29 that closes the rear end opening of the ejection cylinder 27 and has ejection holes 18 formed therein.
The second mounting cylinder portion 24 and the fitting cylinder portion 23 extend rearward from the blocking wall 29. The rear end opening of the ejection hole 18 opens into the fitting cylinder portion 23, and the front end opening of the ejection hole 18 opens into the ejection cylinder 27.
The outer tube 33 extends rearward from the outer circumferential edge of the blocking wall 29. The outer tube 33 surrounds the periphery of the second mounting tube portion 24. The outer tube 33, together with the outer circumferential surface of the ejection tube 27, constitutes the outer surface of the nozzle member 19.

The stopper module 100 switches between restricting and allowing the rearward movement (liquid ejection operation) of the trigger portion 51. The stopper module 100 is provided on the trigger portion 51 so as to be rotatable about an axis along the left-right direction. The stopper module 100 is configured such that a stopper 101 and a biasing member 102 are integrally formed.

The stopper 101 includes an operating portion 101a, a restricting portion 101b, and a rotating shaft 101c.
The operating unit 101a is formed in a C-shape that opens backward in a side view seen from the left and right direction. The operating unit 101a is disposed from the front of the trigger unit 51 across the upper guide tube 51a and the lower guide tube 51b. Specifically, the operating unit 101a includes an upper wall portion 110a that enters the upper guide tube 51a, a lower wall portion 110b that enters the lower guide tube 51b, and a connecting wall 110c that connects the front ends of the upper wall portion 110a and the lower wall portion 110b. Therefore, the operating unit 101a is disposed in a state where it protrudes forward from the front wall portion of the trigger unit 51.

The restricting portion 101b extends rearward from the lower wall portion 110b. The restricting portion 101b passes through the lower guide tube 51b and protrudes rearward relative to the trigger portion 51.
The pivot shaft 101c protrudes toward both the left and right sides at the rear end of the lower wall portion 110b (at the boundary with the restricting portion 101b) and is supported by the lower guide tube 51b so as to be rotatable about an axis along the left and right direction.

The stopper module 100 of this embodiment rotates between a restricting position that restricts the rearward movement of the trigger portion 51 and a permitting position that permits the rearward movement of the trigger portion 51. Specifically, in the restricting position, the rear end of the restricting portion 101b of the stopper module 100 is in close proximity to or in contact with the restricting protrusion 53b from the front. The stopper module 100 restricts the rearward movement of the trigger portion 51 by the restricting portion 101b abutting against the restricting protrusion 53b from the front. In the restricting position, the connection wall 110c extends in a state inclined toward the rear as it extends downward.

In the permissible position shown in FIG. 2, the stopper module 100 has the restricting portion 101b retracted downward from the restricting protrusion 53b. That is, in the permissible position, the restricting portion 101b is positioned so as not to interfere with the restricting protrusion 53b when the trigger portion 51 moves rearward. In the permissible position, the connecting wall 110c extends in the up-down direction. Note that it is preferable that the inclination angle of the connecting wall 110c in the permissible position with respect to the front-rear direction is larger than the inclination angle in the restrictive position.

The biasing member 102 biases the stopper 101 toward the regulating position. The biasing member 102 extends forward from the rear end of the regulating portion 101b. The biasing member 102 is formed in the shape of a leaf spring that extends downward as it moves forward. The biasing member 102 is configured to be elastically deformable in the thickness direction. The front end of the biasing member 102 enters the lower guide tube 51b from the rear. Specifically, a spring receiving portion 51d is formed in the bottom wall 51c of the lower guide tube 51b. The spring receiving portion 51d is a recessed portion in which the inner surface of the bottom wall 51c is gradually deepened as it moves rearward. The front end of the biasing member 102 is in close proximity to or in contact with the front end of the spring receiving portion 51d in the lower guide tube 51b. The biasing member 102 may be provided separately from the stopper 101.

Next, a description will be given of the operation of the trigger type liquid ejector 1 configured as described above. In the following description, it is assumed that each part of the ejector body 20 is already filled with liquid.
To perform a jetting operation of the trigger type liquid jetter 1, first, the nozzle member 19 is rotated relative to the relay member 22 to set the nozzle member 19 to the communicating position.

Next, the trigger-type liquid ejector 1 is grasped, for example, with the index finger or middle finger hooked from the front on the trigger portion 51 and the thumb hooked on the mounting cap 21. In this state, the stopper module 100 is moved from the restricting position to the allowing position as shown in Figures 1 and 2. For example, with the middle finger hooked on the trigger portion 51, the index finger is used to push the operating portion 101a backward. Then, the stopper module 100 rotates around the rotating shaft 101c as the operating portion 101a is pushed backward through the connecting wall 110c. As a result, the operating portion 101a moves backward and the restricting portion 101b moves downward, so that the stopper module 100 is in the allowing position shown in Figure 2. This allows the trigger portion 51 to move backward. In the allowing position, the rear end of the upper wall portion 110a is close to or in contact with the front end wall 52a of the piston 52.

When the stopper module 100 moves from the restricted position to the permitted position, the biasing member 102 attempts to displace forward. At this time, the front end of the biasing member 102 is supported by the spring receiving portion 51d, causing the biasing member 102 to elastically deform into a convex shape facing downward. After the stopper module 100 has been moved to the permitted position, the operating portion 101a is kept pressed by a finger. This makes it possible to prevent the stopper module 100 from elastically returning to the restricted position.

2 and 3, with the stopper module 100 moved to the allowable position, the trigger portion 51 is pulled backward by the index finger or middle finger. Then, the trigger portion 51 moves backward against the biasing force of the elastic plate portion 54, and the piston 52 retreats. As a result, the liquid in the cylinder 53 is introduced into the inner tube 13 of the vertical supply tube portion 10 through the second horizontal hole 17. The liquid introduced into the inner tube 13 pushes down the ball valve 36 to close the tapered tube portion 35, and pushes up the ejection valve 30 to open the upper end opening of the inner tube 13. As a result, the liquid is supplied into the injection tube portion 11 through the first horizontal hole 16 in a pressurized state. The liquid supplied into the injection tube portion 11 reaches the ejection hole 18 through the communication hole 95, the inside of the first mounting tube portion 92, the second switching groove 23a, and the first switching groove 94a, and is ejected from the ejection hole 18. Even if the user releases the operating part 101a when the trigger part 51 has been moved rearward, the restricting part 101b approaches or abuts against the cylinder 53 from below, restricting the return of the stopper module 100 to the restricting position.

After the liquid is ejected, the backward pressure applied to the trigger portion 51 is released, and the trigger portion 51 is urged forward by the restoring force of the elastic plate portion 54, returning it to its original position. As a result, the piston 52 moves forward, generating negative pressure in the cylinder 53. This negative pressure causes the ball valve 36 to rise and open the tapered tube portion 35, while the ejection valve 30 closes the upper end opening of the inner tube 13. As a result, the liquid in the container body A is sucked up into the vertical supply tube portion 10 and introduced into the cylinder 53 through the second horizontal hole 17.

When the liquid ejection operation is completed and the rearward operating force applied to the stopper module 100 is released, the stopper module 100 returns to the restricted position due to the restoring force of the biasing member 102. Specifically, the operation part 101a of the stopper module 100 moves forward and the restricting part 101b moves upward, with the rotation shaft 101c as the fulcrum. This moves the stopper module 100 to the restricted position, and restricts the rearward movement of the trigger part 51. In this embodiment, the configuration in which the ejection operation is performed with fingers hooked on both the stopper module 100 and the trigger part 51 is described, but this configuration is not limited. To perform the ejection operation, a finger may be hooked on at least the stopper module 100, and the trigger part 51 may be pulled rearward via the stopper module 100 with the stopper module 100 moved to the permitted position.

As described above, in the trigger type liquid ejector 1 of this embodiment, the stopper module 100 protrudes forward from the trigger portion 51 and is provided with an operating portion 101 a that can operate the stopper module 100 .
According to this configuration, since the operating portion 101a protrudes forward relative to the trigger portion 51, the operating portion 101a can be operated with a finger or the like hooked on the trigger portion 51 during the liquid ejection operation. That is, the stopper module 100 can be moved to the allowable position during a series of ejection operations in which a finger or the like is hooked on the trigger portion 51 and the trigger portion 51 is moved rearward. Therefore, compared to the conventional configuration in which the connecting member and the piston are in a transmission state before the trigger portion 51 is grasped, it is possible to suppress unexpected ejection of liquid and to exhibit excellent operability.

In the trigger type liquid ejector 1 of the present embodiment, a biasing member 102 is disposed between the stopper 101 and the trigger portion 51 to bias the stopper 101 toward the regulated position.
According to this configuration, the stopper module 100 is returned to the regulating position by releasing the operating force applied to the stopper module 100 via the operating portion 101a. This makes it possible to prevent the stopper module 100 from being forgotten to be returned to the regulating position after the ejection operation is completed, and makes it possible to more reliably prevent the liquid from being ejected unexpectedly.

In the trigger-type liquid ejector 1 of this embodiment, the stopper module 100 is configured to include the restricting portion 101b that approaches or abuts against the cylinder 53 from the front when in the restricting position.
According to this configuration, the stopper module 100 (the restricting portion 101b) comes into contact with the cylinder 53, thereby restricting the rearward movement of the trigger portion 51. Therefore, in the restricting position, the inside of the cylinder 53 is restricted from being pressurized by the piston 52, and the liquid can be restricted from being unexpectedly ejected.

In the trigger type liquid ejector 1 of this embodiment, the trigger portion 51 and the stopper module 100 are each configured to be rotatable in the circumferential direction about an axis extending in the left-right direction.
According to this configuration, both the trigger portion 51 and the stopper module 100 can be operated by a rotation operation. In particular, when the stopper module 100 is moved to the permissible position, the operating portion 101a is moved rearward, so that the liquid can be ejected by pulling the trigger portion 51 rearward following the rotation operation for moving the stopper module 100 to the permissible position. This can further improve operability.

Second Embodiment
The trigger-type liquid ejector 1 of this embodiment differs from the first embodiment described above in that the nozzle member 19 is provided with an engagement portion 200 that restricts and allows movement of the stopper module 100 from the restricted position to the allowed position.
In the trigger type liquid ejector 1 shown in Fig. 4, an engagement portion 200 is formed on the outer tube 33 of the nozzle member 19. The engagement portion 200 is formed on a portion of the outer tube 33 that faces downward when the nozzle member 19 is in the blocking position. That is, the engagement portion 200 is movable in the circumferential direction about the axis O2 of the guide shaft portion 94 according to the rotational position of the nozzle member 19. The engagement portion 200 of this embodiment moves between an engagement position where it protrudes downward and a disengagement position where it faces in a direction other than downward as the nozzle member 19 moves between the blocking position and the communication position.

When viewed from the front, the engagement portion 200 protrudes in a radial direction intersecting the axis O2 of the guide shaft portion 94. When viewed from the side, the engagement portion 200 is formed in a triangular shape. In the illustrated example, the inclination angle of the slope facing forward of the engagement portion 200 is larger than the inclination angle of the slope facing rearward.

The stopper module 100 has a hook portion 150 on the upper wall portion 110a of the operating portion 101a. The hook portion 150 protrudes upward from the front of the upper wall portion 110a. When the stopper module 100 is in the restricted position and the engaging portion 200 is in the engaged position, the hook portion 150 approaches or abuts against the engaging portion 200 from the front. By abutting against the engaging portion 200 from the front, the hook portion 150 restricts the movement of the stopper module 100 toward the permitted position. In the illustrated example, the biasing member 102 extends while curving downward as it moves forward. The front end of the biasing member 102 contacts the rear surface of the trigger portion 51.

In the trigger type liquid ejector 1 of this embodiment, when the nozzle member 19 is in the blocking position, the engagement portion 200 is in the engaging position, so that the hook portion 150 engages with the engagement portion 200, and the movement of the stopper module 100 to the allowable position is restricted. To eject liquid from this state, the nozzle member 19 is first moved to the communicating position. Specifically, as shown in Figures 4 and 5, the nozzle member 19 is rotated to the communicating position. Then, the engagement portion 200 retreats circumferentially relative to the hook portion 150, and the engagement portion 200 moves to the disengagement position. This releases the restriction on the stopper module 100. In this state, as in the first embodiment, after moving the stopper module 100 to the allowable position, the trigger portion 51 is pulled backward to eject liquid through the ejection hole 18. After the liquid ejection operation, the nozzle member 19 is rotated to the blocking position with the stopper module 100 returned to the restricting position, and the engagement portion 200 moves to the engaged position. This causes the engagement portion 200 to move rearward from the hook portion 150, once again restricting the movement of the stopper module 100 to the permitted position.

In this embodiment, in addition to providing the same effect as the first embodiment described above, the nozzle member 19 can restrict the movement of the stopper module 100 itself to the permitted position. This makes it possible to more reliably prevent liquid from being unexpectedly ejected.

Third Embodiment
In the trigger type liquid ejector 1 shown in Fig. 6, the nozzle member 19 has a guide wall 201 extending radially from the outer tube 33 along the axis O2. The guide wall 201 protrudes downward from the outer tube 33 when the nozzle member 19 is in the blocking position. The guide wall 201 is disposed on one side in the left-right direction with respect to the stopper module 100 when the nozzle member 19 is in the blocking position.

The guide wall 201 is formed with an engagement protrusion 202 extending toward the other side in the left-right direction. When the nozzle member 19 is in the blocking position, the engagement protrusion 202 enters the rear of the operation portion 101a and restricts the movement of the stopper module 100 to the permissible position (engaged position). Specifically, in the engaged position, the engagement protrusion 202 is located behind the connecting wall 110c and below the upper wall portion 110a, and is close to or in contact with the connecting wall 110c and the upper wall portion 110a. The engagement protrusion 202 restricts the movement of the stopper module 100 to the permissible position by abutting against the upper wall portion 110a or the connecting wall 110c.

Meanwhile, the engagement protrusion 202 moves in the circumferential direction about the axis O2 as the nozzle member 19 moves from the blocking position to the communicating position. As a result, when the nozzle member 19 is in the communicating position, the engagement protrusion 202 retreats in the circumferential direction from the movement trajectory of the operating portion 101a when the stopper module 100 moves to the allowing position (disengagement position). As a result, the stopper module 100 can move from the restricting position to the allowing position.

In this embodiment, the nozzle member 19 can also restrict the movement of the stopper module 100 itself to the permitted position. This makes it possible to more reliably prevent the liquid from being unexpectedly ejected.

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-described embodiment, the stopper module 100 is configured to include the biasing member 102, but the stopper module 100 may not include the biasing member 102.
In the above embodiment, the stopper module 100 moves between the restricted position and the permitted position by rotating about an axis along the left-right direction, but the present invention is not limited to this configuration. The stopper module 100 may be configured to perform, for example, a sliding motion or a rotating motion about an axis along the front-rear direction as long as the operation unit 101a protrudes forward from the trigger unit 51.
In the above embodiment, the restricting portion 101b abuts against the cylinder 53, but the present invention is not limited to this configuration. The restricting portion 101b may abut against any position of the ejector main body 20. For example, the restricting portion 101b may abut against the cylinder mounting tube 40.
In the above embodiment, the trigger portion 51 is rotatably provided, but the present invention is not limited to this configuration. The trigger portion 51 may be provided so long as it is movable in the front-rear direction.

In addition, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the spirit of the present invention, and the above-described modifications may be combined as appropriate.

1: Trigger-type liquid ejector 10: Vertical supply cylinder portion 18: Ejection hole 19: Nozzle member 20: Ejector body 40: Cylinder mounting cylinder (cylinder portion)
51: Trigger portion 52: Piston 53: Cylinder (cylinder portion)
101: stopper 101a: operating portion 101b: restricting portion 102: biasing member A: container body T: trigger mechanism

Claims (4)

An ejector body that is attached to a container that contains a liquid;
a nozzle member attached to 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 provided in front of the vertical supply tube portion and 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;
a stopper provided on the trigger portion to be movable between a restricting position that restricts the rearward movement of the trigger portion and an allowing position that allows the rearward movement of the trigger portion,
The stopper protrudes forward relative to the trigger portion and includes an operation portion capable of operating the stopper ,
A biasing member is disposed between the stopper and the trigger portion, the biasing member extending downward as it moves forward from the stopper and biasing the stopper toward the regulating position,
The trigger portion is provided with a spring receiving portion that contacts the front end portion of the biasing member and that gradually becomes deeper toward the rear . The trigger mechanism includes:
A piston that moves back and forth in response to the movement of the trigger portion;
a cylinder portion into which the piston is inserted and whose interior is in communication with the vertical supply tube portion;
The trigger type liquid ejector according to claim 1 , wherein the stopper includes a restricting portion that is in close proximity to or in contact with the cylinder portion from the front when in the restricting position. The trigger portion and the stopper are configured to be rotatable about axes extending in a left-right direction intersecting a front-rear direction when viewed from a top-bottom direction,
3. The trigger-type liquid ejector according to claim 1, wherein the stopper moves from the restricting position to the allowing position in association with rearward movement of the operating portion. A trigger-type liquid ejector as described in any one of claims 1 to 3, wherein the nozzle member is rotatable about an axis extending in the forward/backward direction relative to the ejector body between an engagement position that restricts movement of the stopper from the restricting position to the permissible position, and a disengagement position that allows movement of the stopper from the restricting position to the permissible position.

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