JP2016221457A - Trigger type liquid sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously spray a liquid.SOLUTION: A liquid sprayer includes a sprayer main body 2, and a nozzle member 3 with a spray hole 4 formed. The sprayer main body 2 includes: a vertical supply cylinder part 10 for sucking a liquid; a jetting cylinder part 11 communicating with an inside of the vertical supply cylinder part 10; and a trigger mechanism 50 which has a trigger part 51 arranged so as to swing backward in a forward biased state, and introduces the liquid from the inside of the vertical supply cylinder part 10 to an inside of the jetting cylinder part 11 by swinging the trigger part 51 backward to jet from the inside of the jetting cylinder part 11. The nozzle member 3 includes: an auxiliary cylinder 90 of which an inside communicates with the inside of the jetting cylinder part 11 through a supply hole 95a; a plunger 91 which is housed in the auxiliary cylinder 90 so as to move backward in a forward biased state; and a communication hole 104 communicating between the inside of the auxiliary cylinder 90 and the jetting hole 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a trigger type liquid ejector.

2. Description of the Related Art A trigger type liquid ejector that sucks up liquid from a container body and discharges it from a nozzle by operating a trigger portion extending below the nozzle is known (for example, Patent Document 1 below).
In a conventional trigger type liquid ejector, an injection cylinder portion extending toward the front is provided on an upper portion of a vertical supply cylinder portion communicating with a container body. A nozzle is attached to the distal end side of the injection tube portion. A cylinder that is operated by operating the trigger portion is disposed below the injection cylinder portion. And by operating the trigger part, the liquid can be sucked into the cylinder from the vertical supply cylinder part, and the liquid can be ejected (spouted) forward from the injection cylinder part through the nozzle.

Japanese Patent No. 3789904

  However, in the conventional trigger type liquid ejector, liquid is ejected only when the trigger portion is pulled. Therefore, for example, when the liquid is sprayed over a large area, it is necessary to repeat the operation of pulling the trigger portion many times, which is troublesome.

  This invention is made | formed in view of such a situation, The objective is to provide the trigger type | mold liquid ejector which enabled the continuous injection of the liquid.

  In order to solve the above problems and achieve such an object, a trigger type liquid ejector according to the present invention includes an ejector body mounted on a container body in which a liquid is stored, and a front side of the ejector body. And a nozzle member formed with an ejection hole for ejecting liquid toward the front, wherein the ejector body extends vertically and sucks up the liquid in the container body. And an injection cylinder part extending forward from the vertical supply cylinder part, and an inner side communicating with the inside of the vertical supply cylinder part, and extending downward from the injection cylinder part and being forward-biased And the liquid is introduced into the injection cylinder part from the vertical supply cylinder part by swinging the trigger part to the rear, and in the injection cylinder part. And a trigger mechanism for injecting toward the ejection hole side from The trigger mechanism includes a main piston that moves in the front-rear direction in conjunction with the swinging of the trigger portion, an internal pressure that is increased and decreased according to the movement of the main piston, and an internal portion that is connected to the vertical supply cylinder portion. A main cylinder that is in communication; a discharge valve that is disposed in the vertical supply cylinder, and that switches between communication between the injection cylinder and the main cylinder and switching between them; and a discharge valve that is disposed in the vertical supply cylinder, And a suction valve that switches between communication between the main cylinder and the main cylinder, and the nozzle member extends in the front-rear direction and has an auxiliary cylinder that communicates with the inside of the injection cylinder through a supply hole, and the auxiliary A plunger accommodated in the cylinder so as to be able to move backward in a forward biased state, and a communication hole for communicating the inside of the auxiliary cylinder and the ejection hole is formed. And butterflies.

According to the present invention, when the trigger part is pulled backward in a state where the liquid container is installed in the container body, the liquid in the container body sucked up through the vertical supply cylinder part is introduced into the injection cylinder part. The liquid in the cylinder can be injected from the injection cylinder and introduced into the auxiliary cylinder through the supply hole. Thereby, the plunger in the auxiliary cylinder can be moved backward against the forward bias. At this time, the liquid from the inside of the injection cylinder part can be guided to the ejection hole through the communication hole and can be ejected to the outside from the ejection hole.
In this way, each time the operation of pulling the trigger portion is performed, the plunger can be moved backward while the liquid is ejected from the ejection hole, and the liquid can be stored (filled) in the auxiliary cylinder.

When the operation of pulling the trigger portion is stopped, the supply of the liquid into the injection tube portion is stopped, but the plunger starts to move forward due to the forward bias. Thereby, the liquid filled in the auxiliary cylinder can be continuously ejected from the ejection hole through the communication hole. Therefore, the liquid can be ejected not only when the trigger part is pulled backward but also when the trigger part is not operated, and the liquid can be continuously ejected.
When the plunger is advanced, if the trigger portion is not pulled again, the plunger moves forward to the most advanced position, but the operation of pulling the trigger portion before that can be repeated. In this case, the plunger repeatedly moves backward and forward with a substantially constant width, and gradually moves backward as a whole. As a result, liquid gradually accumulates in the auxiliary cylinder.

  Here, the communication hole may be formed in a front wall portion of the auxiliary cylinder, and the plunger may close the communication hole so as to be freely opened.

In this case, the auxiliary cylinder is formed with a communication hole communicating with the ejection hole and a supply hole communicating with the inside of the injection cylinder, and the plunger directly closes the communication hole. It is possible to easily reduce the space volume (the internal volume occupied by the route) of the route to reach without restriction. Therefore, when the trigger portion is operated, the liquid can be immediately introduced from the injection cylinder portion into the auxiliary cylinder. Therefore, it is easy to quickly increase the pressure in the auxiliary cylinder and immediately move the plunger backward. Therefore, since the liquid can be ejected promptly while suppressing the number of priming times, it is easy to use and has excellent operability.
Furthermore, since the plunger directly blocks the communication hole, the liquid is not ejected unless the internal pressure of the auxiliary cylinder exceeds a predetermined value. Therefore, the liquid can be ejected at an appropriate pressure (injection pressure) without providing a high-pressure valve or the like, and the configuration can be easily simplified. In addition, since the pressure can be accumulated by moving the plunger biased forward, the liquid can be ejected in a state where pressure is further applied to the liquid.
Furthermore, it is possible to effectively suppress liquid leakage from the ejection holes when not in use.

  Further, the communication hole may open toward the front end opening of the injection tube portion.

  In this case, since the communication hole opens toward the front end opening of the injection cylinder part, when the trigger part is pulled rearward, a part of the liquid from the injection cylinder part passes through the supply hole and the auxiliary cylinder. It is possible to reach the ejection hole directly through the communication hole without passing through it, and the liquid can be stably ejected even before the liquid is stored in the auxiliary cylinder.

  Further, the nozzle member is provided with an operation member disposed so as to be movable backward with respect to the auxiliary cylinder, and the operation member is disposed rearward from a locked portion formed on the plunger. And when the plunger moves backward, the locking portion locks from the front, and when the operating member moves backward relative to the auxiliary cylinder, the proximity portion approaches the trigger portion. Or you may provide the control part which contact | abuts and controls the rocking | fluctuation of the said trigger part.

In this case, by continuously repeating the operation of pulling the trigger portion, when the plunger largely moves rearward, the locked portion of the plunger is locked to the locking portion of the operating member. Therefore, when the plunger moves further rearward by further operation of the trigger portion, the operation member moves rearward with respect to the auxiliary cylinder. Thereby, the restricting portion of the actuating member can be brought close to or in contact with the trigger portion, and swinging of the trigger portion can be restricted.
Therefore, it is possible to mechanically prevent the plunger from moving excessively toward the rear, and it is possible to prevent the auxiliary cylinder from being filled with an excessive amount of liquid. Thereby, it is possible to prevent the pressure in the auxiliary cylinder from rising excessively, and to prevent problems such as breakage. For this reason, it is easy to use, and the continuous ejection of liquid can be performed with peace of mind.

  Further, in the auxiliary cylinder, a recovery passage communicating with the inside of the container body may be opened in a portion spaced rearward from the front wall portion of the auxiliary cylinder.

  In this case, since the recovery passage is opened in the auxiliary cylinder, when the plunger moves backward to the rear side of the portion of the auxiliary cylinder where the recovery passage opens, the space in which the liquid is stored in the auxiliary cylinder is recovered. It communicates with the container through the passage. At this time, even if the liquid in the injection cylinder is further introduced into the auxiliary cylinder, the liquid can be returned to the container through the recovery passage. Thereby, it is possible to prevent the pressure in the auxiliary cylinder from rising excessively, and to prevent problems such as breakage. For this reason, it is easy to use, and the continuous ejection of liquid can be performed with peace of mind.

  The ejector body includes a first mounting portion disposed at a front end portion of the injection tube portion, and the nozzle member includes a second mounting portion mounted on the first mounting portion, and the ejection hole. A nozzle body formed, and a fourth mounting part for connecting the nozzle body and the auxiliary cylinder by mounting a third mounting part provided in the nozzle body. The three mounting portions may be formed so as to be mountable on the first mounting portion of the ejector body.

  In this case, since the third mounting portion of the nozzle body is formed to be mountable on the first mounting portion of the ejector body, the nozzle member includes the auxiliary cylinder, the plunger, the second mounting portion, and the fourth mounting portion. Without changing the design of the existing trigger type liquid ejector, which has only the nozzle body and the third mounting portion of the nozzle body is mounted on the first mounting portion of the ejector body, It can be used as it is.

  According to the present invention, liquid can be ejected not only when the operation of pulling the trigger portion backward is performed but also when the trigger portion is not operated, and continuous liquid ejection can be performed.

It is a longitudinal section showing a 1st embodiment of a trigger type liquid ejector concerning the present invention. It is the front view which looked at the trigger type liquid ejector shown in FIG. 1 from the front. It is the rear view which looked at the trigger type liquid ejector shown in FIG. 1 from back. In the trigger type liquid ejector shown in FIG. 1, it is a side view (partly longitudinal cross-sectional view) which shows the state which pulled the trigger part to the back side. FIG. 5 is a side view (partially longitudinal sectional view) showing a state in which the trigger member is further pulled rearward from the state shown in FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the trigger type liquid ejector which concerns on this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the trigger type liquid ejector which concerns on this invention. It is a principal part enlarged view of the trigger type liquid ejector shown in FIG. It is the rear view which looked at the trigger type liquid ejector shown in FIG. 7 from back. It is the top view which looked at the principal part of the ejector main body of the trigger type liquid ejector shown in FIG. 7 from upper direction. It is a longitudinal cross-sectional view which shows 4th Embodiment of the trigger type liquid ejector which concerns on this invention.

(First embodiment)
Hereinafter, a first embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, a trigger type liquid ejector 1 according to this embodiment is mounted on a container body A that contains a liquid, and includes an ejector body 2 having a vertical supply cylinder portion 10 that sucks the liquid, and an ejection hole 4. And a nozzle member 3 mounted on the ejector body 2.
Each component of the trigger type liquid ejector 1 is a molded product using a synthetic resin unless otherwise specified.

  Here, in the present embodiment, the central axis of the vertical supply cylinder portion 10 is defined as an axis O1, and the container body A side is referred to as the lower side along the axis O1, and the opposite side is referred to as the upper side. One direction orthogonal to the axis O1 is referred to as the front-rear direction, and the direction orthogonal to the direction of the axis O1 and the front-rear direction is referred to as the left-right direction.

The ejector body 2 includes the vertical supply cylinder portion 10 extending in the vertical direction, and an injection cylinder portion that extends from the vertical supply cylinder portion 10 along the front-rear direction and communicates with the inside of the vertical supply cylinder portion 10. 11 and is formed in an L shape in a side view as viewed from the left-right direction.
In the front-rear direction, the direction in which the injection cylinder part 11 extends from the vertical supply cylinder part 10 is referred to as the front side or the front side, and the opposite direction is referred to as the rear side or the rear side.

The vertical supply cylinder portion 10 includes a top cylinder-shaped outer cylinder 12 and an inner cylinder 13 fitted into the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b disposed above the large-diameter portion 12a and having a diameter smaller than that of the large-diameter portion 12a, an upper end portion of the large-diameter portion 12a, and a lower end portion of the small-diameter portion 12b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above. The upper end opening of the small diameter portion 12b is closed by the top wall portion 12d.

  The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b disposed above the large-diameter portion 13a and having a diameter smaller than that of the large-diameter portion 13a, an upper end portion of the large-diameter portion 13a, and a lower end portion of the small-diameter portion 13b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above.

In the small diameter portion 13b of the inner cylinder 13, an upper portion of a pipe 15 that is disposed in the container body A and that has a lower end opening located at a bottom portion (not shown) of the container body A is fitted. The flange portion 13c of the inner cylinder 13 is positioned below the flange portion 12c of the outer cylinder 12 in a state where a clearance S1 is secured between the flange portion 12c of the outer cylinder 12 and the flange portion 12c. In the large diameter portion 13 a of the inner cylinder 13, an annular flange portion 13 d that protrudes outward in the radial direction is formed at a portion protruding downward from the large diameter portion 12 a of the outer cylinder 12. The flange portion 13d is disposed in the upper end portion of the mounting cap 14 that is mounted (for example, screwed) to the mouth portion A1 of the container body A, and locks the upper end portion of the mounting cap 14 around its axis. The collar portion 13d is sandwiched in the vertical direction by the mounting cap 14 and the upper end opening edge at the mouth portion A1 of the container body A.
In addition, the axis O1 of the vertical supply cylinder portion 10 configured by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the container axis of the container body A.

  The rear end portion of the injection cylinder portion 11 is connected to the front side of the upper end portion of the vertical supply cylinder portion 10. The inside of the injection cylinder part 11 communicates with the inside of the vertical supply cylinder part 10 through an outer discharge hole 16 formed in the outer cylinder 12 and an inner discharge hole 17 formed in the inner cylinder 13.

A discharge valve 30 that is elastically deformable in the vertical direction is disposed on the inner side of the upper end portion of the inner cylinder 13.
The discharge valve 30 is fitted in the inner cylinder 13, is disposed below the base part 31 with the base part 31 in contact with the lower surface of the top wall part 12 d of the outer cylinder 12, and has a step on the inner peripheral surface of the inner cylinder 13. And a hollow spring portion 34 that vertically connects the base portion 31 and the valve body 33 to the valve seat 32 formed in a shape.

The valve body 33 is pressed from above by the hollow spring portion 34 and is in close contact with the valve seat 32. Accordingly, the valve body 33 blocks communication between the space located above the valve seat 32 in the inner cylinder 13 and the space located below the valve seat 32.
The valve body 33 rises against the urging force of the hollow spring portion 34 and is separated from the valve seat 32, so that a space located above the valve seat 32 in the inner cylinder 13 and the valve seat 32. Also communicates with the space located below.

A portion of the inner peripheral surface of the inner cylinder 13 positioned below the valve seat 32 and positioned above the upper end of the pipe 15 is formed with an annular tapered cylindrical portion 35 that protrudes inward. Yes.
The tapered cylindrical portion 35 is gradually reduced in diameter as it goes downward. A spherical suction valve 36 that is detachably seated on the inner peripheral surface of the tapered cylindrical portion 35 is disposed inside the tapered cylindrical portion 35. In the inner cylinder 13, the suction valve 36 communicates and blocks a space located above the tapered cylinder part 35 and a space located below the taper cylinder part 35.

In the outer cylinder 12, a cylinder cylinder portion 40 that protrudes forward is integrally formed at a portion located below the injection cylinder portion 11.
The cylinder cylinder portion 40 is open toward the front, and is partially formed integrally with the flange portion 12c of the outer cylinder 12.

  The ejector main body 2 extends downward from the injection cylinder portion 11 and moves in the front-rear direction in conjunction with the trigger portion 51 disposed so as to be swingable rearward in a forward-biased state. The main piston 52, the main cylinder 53 whose inside is pressurized and depressurized as the main piston 52 moves, the elastic plate part 54 that urges the trigger part 51 forward, the vertical supply cylinder part 10, and the injection cylinder part 11 and a cover body 55 that covers the entire auxiliary cylinder 90, which will be described later, from above, from behind, and from the left and right.

  Further, the discharge valve 30, the suction valve 36, the trigger part 51, the main piston 52, the main cylinder 53, and the elastic plate part 54 described above allow liquid to flow from the inside of the vertical supply cylinder part 10 by swinging the trigger part 51 backward. A trigger mechanism 50 is configured to be introduced into the injection cylinder portion 11 and to be injected from the injection cylinder portion 11 to the ejection hole 4 side.

  The main cylinder 53 protrudes forward from the outer cylinder part 60 that opens toward the front, the rear wall part 61 that closes the rear opening of the outer cylinder part 60, and the central part of the rear wall part 61. And a piston guide 62 whose front end is closed.

The piston guide 62 is opened rearward on the inside, and a fitting protrusion 41 projecting forward from the rear wall (the small diameter portion 12b of the outer cylinder 12) of the cylinder cylinder portion 40 is provided in the opening. It is mated.
The outer cylinder part 60 is fitted inside the cylinder cylinder part 40. The inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60 are in close contact with each other at both ends in the front-rear direction. On the other hand, an annular gap S2 is secured in an intermediate portion located between both end portions in the front-rear direction, between the inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60. .

  The outer cylinder part 60 is formed with a first air vent 63 that allows the inside of the outer cylinder part 60 to communicate with the gap S2. A second ventilation hole 64 that communicates the gap S2 with the flange portion 12c of the outer cylinder 12 and the gap S1 defined between the flange portion 12c of the outer cylinder 12 and the flange portion 13c of the inner cylinder 13. Is formed. Further, the flange portion 13 c of the inner cylinder 13 is formed with a third vent hole 65 that allows the gap S <b> 1 to communicate with the large diameter portion 13 a of the inner cylinder 13 and the inside of the mounting cap 14.

A first through hole 66 penetrating in the front-rear direction is formed in the rear wall portion 61 of the main cylinder 53 at a portion located above the piston guide 62. In the illustrated example, a cylindrical portion protruding rearward is formed at the opening peripheral edge portion of the first through hole 66 in the rear wall portion 61, and this cylindrical portion is formed in the small diameter portion 12 b of the outer cylinder 12. Is fitted into the through-hole. The first through hole 66 communicates with the space located between the discharge valve 30 and the suction valve 36 in the inner cylinder 13 through the second through hole 67 formed in the inner cylinder 13 of the vertical supply cylinder portion 10. doing.
Thereby, the inside of the main cylinder 53 communicates with the space located between the discharge valve 30 and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. Therefore, the discharge valve 30 switches communication between the inside of the injection cylinder portion 11 and the main cylinder 53 and shuts off thereof, and the suction valve 36 switches communication between the inside of the container body A and the inside of the main cylinder 53 and shuts off thereof.

The main piston 52 includes a columnar connecting part 70 connected to the trigger part 51, and a piston cylinder 71 located behind the connecting part 70 and having a larger diameter than the connecting part 70, and as a whole. It is formed in a cylindrical shape that opens rearward.
The main cylinder 53 and the main piston 52 are disposed on a common axis (not shown) extending along the front-rear direction.

  The piston cylinder 71 has a piston main body 72 that opens rearward and into which the piston guide 62 is inserted. The piston cylinder 71 projects outward from the rear end of the piston main body 72 in the radial direction. A sliding cylinder portion 73 that is in close sliding contact with the inner peripheral surface of the portion 60.

The piston main body 72 has an inner diameter larger than the outer diameter of the piston guide 62. In the illustrated example, there is a slight gap between the inner peripheral surface of the piston main body 72 and the outer peripheral surface of the piston guide 62.
The sliding cylindrical portion 73 is formed in a tapered shape that gradually increases in diameter from the central portion in the front-rear direction toward the front and rear, and the lip portions 73a positioned at both ends in the front-rear direction are the inner peripheral surface of the outer cylindrical portion 60 In sliding contact with

  The connecting portion 70 of the main piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. Thereby, the main piston 52 is urged forward by the urging force of the elastic plate portion 54 together with the trigger portion 51, and moves rearward in the main cylinder 53 as the trigger portion 51 moves rearward. Pushed in.

  Further, when the trigger portion 51 is at the foremost swing position, the sliding cylinder portion 73 of the main piston 52 closes the first vent hole 63. When the main piston 52 moves backward by a predetermined amount due to the backward swing of the trigger portion 51, the sliding cylinder portion 73 opens the first vent hole 63. Thereby, the inside of the container body A communicates with the outside through the third ventilation hole 65, the second ventilation hole 64, and the first ventilation hole 63.

  The trigger portion 51 has a main plate member 80 having a front surface that is concavely curved toward the rear in a side view as viewed from the left and right directions, and a pair of side plate members 81 that stand rearward from the left and right side edge portions of the main plate member 80. And.

A pair of connecting plates 82 are formed at the upper end portions of the pair of side plate members 81 so as to extend upward to the side of the injection tube portion 11 and sandwich the injection tube portion 11 from the left-right direction. The pair of connecting plates 82 are provided with a rotating shaft portion 83 projecting outward in the left-right direction. These rotary shaft portions 83 are rotatably supported by bearing portions provided on an upper plate member 84 that covers the upper side of the injection cylinder portion 11.
Thereby, the trigger part 51 can be swung in the front-rear direction around the rotation shaft part 83.

The trigger 51 is formed with an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 is formed so as to extend rearward from the peripheral edge of the opening 51a.
A pair of connecting shafts 86 projecting in the left-right direction toward the inner side of the connecting cylinder 85 are formed on a portion of the inner peripheral surface of the connecting cylinder 85 positioned on the rear side. These connecting shafts 86 are inserted into connecting holes formed in the connecting portion 70 of the main piston 52. Thereby, the trigger part 51 and the main piston 52 are mutually connected.

  The connecting portion 70 of the main piston 52 is connected to the connecting shaft 86 so as to be rotatable about its axis and movable by a predetermined amount in the vertical direction. Thereby, the main piston 52 can be moved back and forth as the trigger portion 51 swings in the front-rear direction.

The horizontal plate-like upper plate member 84 connected to the top wall portion 12 d 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 elastic plate portions 54 are integrally formed on both the left and right sides of the upper plate member 84 so as to be formed in an arc shape that is convex forward in a side view as viewed from the left and right directions and that extends to below the injection cylinder portion 11. Yes. The elastic plate portion 54 is formed in a circular arc shape that is concentric with each other when viewed from the side in the left-right direction, and includes a pair of leaf springs arranged in the front-rear direction.

Of the pair of leaf springs, the leaf spring located on the front side is the main leaf spring 54a, and the leaf spring located on the rear side is the sub leaf spring 54b.
The lower ends of the main leaf spring 54a and the sub leaf spring 54b are integrally connected via an arcuate folded portion 54c. A locking piece 54d projects downward from the folded portion 54c, and the locking piece 54d is inserted into and engaged with a pocket portion 81a formed in the side plate member 81 of the trigger portion 51 from above. ing.
Thereby, the elastic board part 54 is urging | biasing the trigger part 51 toward the front via the locking piece 54d and the pocket part 81a.

The upper end portion of the main plate member 80 of the trigger portion 51 is in contact with the lower end portion of the connection wall 123, which will be described later, from behind by the biasing by the elastic plate portion 54. Thereby, the trigger part 51 is positioned in the foremost swing position.
When the trigger portion 51 is pulled backward from the foremost swing position, the elastic plate portion 54 is elastically deformed so as to move the folded portion 54c backward via the locking piece 54d. At this time, in the elastic plate portion 54, the sub leaf spring 54b is elastically deformed larger than the main leaf spring 54a.

  Even when the trigger portion 51 is pulled rearward, the locking piece 54d is engaged with the pocket portion 81a until the trigger portion 51 reaches the rearmost swinging position while being pulled upward from the pocket portion 81a. Maintain a consistent state.

  The nozzle member 3 is mainly disposed in front of and above the ejector body 2, and has an auxiliary cylinder 90 extending in the front-rear direction, a plunger 91 accommodated in the auxiliary cylinder 90, and the injection cylinder portion 11. A mounting cylinder 92 mounted on the auxiliary cylinder 90, and an operating member 130 arranged to be movable backward with respect to the auxiliary cylinder 90.

The auxiliary cylinder 90 is disposed above the injection cylinder portion 11 and extends in the front-rear direction. Thereby, the auxiliary cylinder 90 is arranged in parallel to the injection cylinder part 11.
The auxiliary cylinder 90 includes a front wall portion 95 and a cylinder tube 96 extending rearward from the front wall portion 95, and is formed in a cylindrical shape opened rearward. The front wall portion 95 projects downward from the cylinder cylinder 96 and is formed longer in the vertical direction than in the left-right direction when the nozzle member 3 is viewed from the front side.

As shown in FIG. 1, the cylinder cylinder 96 is disposed on the upper plate member 84 in the ejector body 2 and protrudes rearward from the vertical supply cylinder portion 10. A cap 97 is attached to the rear end portion of the cylinder cylinder 96.
The cap 97 includes a cap inner cylinder 97a fitted inside the cylinder cylinder 96, a cap outer cylinder 97b fitted outside the cylinder cylinder 96, and an annular shape projecting inward in the radial direction from the cap inner cylinder 97a. Guide ring 97c.

  A columnar nozzle shaft portion 100 projects from the front wall portion 95 of the auxiliary cylinder 90 toward the front, and a surrounding tube 101 that surrounds the nozzle shaft portion 100 from the outside projects toward the front. ing. The nozzle shaft part 100 and the surrounding cylinder 101 are arranged coaxially with the central axis O 2 of the cylinder cylinder 96. The surrounding tube 101 slightly protrudes forward from the nozzle shaft portion 100.

An annular flow passage 102 is formed between the nozzle shaft portion 100 and the surrounding cylinder 101. In addition, the nozzle shaft portion 100 is fitted with a nozzle cap 103 in which an ejection hole 4 that opens forward is formed, and the flow passage 102 and the ejection hole 4 communicate with each other. A communication hole 104 that communicates with the flow passage 102 is formed in the front wall portion 95.
Thus, the inside of the auxiliary cylinder 90 communicates with the ejection hole 4 through the communication hole 104 and the flow passage 102. That is, the communication hole 104 communicates the inside of the auxiliary cylinder 90 and the ejection hole 4 through the flow passage 102.

  Further, a supply hole 95 a that communicates with the inside of the auxiliary cylinder 90 and a minute channel 126 described later is formed at the front end of the cylinder cylinder 96. The supply hole 95a is formed in the lower portion of the front end portion of the cylinder cylinder 96 and penetrates this portion in the vertical direction.

The plunger 91 includes a rod 110 and an auxiliary piston 111 fitted to the front end portion of the rod 110, and is accommodated in the auxiliary cylinder 90 so as to be movable rearward in a forward biased state.
The rod 110 is formed in a cylindrical shape opened rearward, and an enlarged diameter guide portion 110 a that protrudes toward the inner peripheral surface of the cylinder cylinder 96 is formed on the outer peripheral surface. The rear end opening edge of the rod 110 functions as a locked portion 110b locked from the front to an annular wall (locking portion) 137 of the insertion portion 131 in the operating member 130 described later.
The auxiliary piston 111 is formed in a tapered shape that gradually increases in diameter from the central portion in the front-rear direction toward the front and rear, and both end portions in the front-rear direction are in slidable contact with the inner peripheral surface of the cylinder cylinder 96. A lip portion 111a is formed.

Between the plunger 91 and the cap 97, for example, a metal coil spring 112 is disposed in a state of extending in the front-rear direction and being compressed in the front-rear direction.
The coil spring 112 is disposed so as to surround the rod 110, and the rear end portion comes into contact with the cap inner tube 97 a of the cap 97 from the front, and the front end portion comes into contact with the diameter-enlarged guide portion 110 a from the rear. Accordingly, the coil spring 112 biases the plunger 91 forward in the auxiliary cylinder 90.

The auxiliary piston 111 is formed with a convex portion 113 that protrudes forward and enters the communication hole 104 formed in the front wall portion 95 of the auxiliary cylinder 90 to directly block the communication hole 104.
Thus, the plunger 91 closes the communication hole 104 so as to be freely opened. In particular, the convex 113 is closed in a state where the communication hole 104 is sealed by urging from the coil spring 112.

The position of the plunger 91 when the convex 113 closes the communication hole 104 is the most advanced position. Therefore, when the plunger 91 is disposed at the most advanced position, almost no liquid is contained in the auxiliary cylinder 90 and the communication between the auxiliary cylinder 90 and the communication hole 104 is blocked.
On the other hand, when the plunger 91 is moved backward, the position of the plunger 91 when the locked portion 110b of the rod 110 is in contact with the annular wall 137 of the actuating member 130, which will be described later, is set immediately before the last retraction. Position. Further, the position of the plunger 91 when the plunger 91 further moves rearward beyond the position immediately before the last retreat and the operation member 130 moves rearward with respect to the auxiliary cylinder 90 is defined as a last retreat position.
Therefore, when the plunger 91 has reached the last retracted position, the maximum amount of liquid is stored in the auxiliary cylinder 90.

An outer cylinder 321 that surrounds the surrounding cylinder 101 from the outside in the radial direction is provided on the front wall portion 95 of the auxiliary cylinder 90 so as to protrude forward.
Further, a mounting cylinder 92 is integrally formed on the front wall portion 95 via an intermediate cylinder 122 extending rearward from the front wall portion 95. The mounting cylinder 92 is fitted to the injection cylinder portion 11 from the front. Thereby, the nozzle member 3 is combined with the ejector body 2 via the mounting cylinder 92.

The intermediate cylinder 122 is disposed below the auxiliary cylinder 90 and is integrally formed on the lower surface of the cylinder cylinder 96. The inside of the intermediate cylinder 122 communicates with the inside of the injection cylinder portion 11. The inner diameter of the intermediate cylinder 122 is smaller than the inner diameter of the injection cylinder portion 11. Thereby, it is suppressed that the space volume in the intermediate | middle cylinder 122 becomes large.
The intermediate cylinder 122 is formed with a vertical hole that penetrates in the vertical direction and communicates the inside of the auxiliary cylinder 90 and the inside of the intermediate cylinder 122. The upper end opening of this vertical hole serves as the supply hole 95a described above. Yes. The plug body 125 is inserted over almost the entire length in the vertical direction in the vertical hole. The plug body 125 opens the supply hole 95a and closes the lower end opening of the vertical hole, and between the inner periphery of the vertical hole and the auxiliary cylinder 90, between the inner peripheral surface of the vertical hole. The micro flow path 126 which connects is formed. Due to the plug 125, the space volume of the vertical hole is further reduced.
As described above, the inside of the injection cylinder portion 11 and the inside of the auxiliary cylinder 90 communicate with each other through the inside of the intermediate cylinder 122, the micro flow path 126, and the supply hole 95a. Moreover, since the path | route from the injection cylinder part 11 to the supply hole 95a is the inside of the intermediate | middle cylinder 122 and the microchannel 126, it can suppress that the space volume of these paths | routes becomes large.

In the present embodiment, an insertion portion 201 that extends rearward and is inserted over substantially the entire length in the front-rear direction in the injection tube portion 11 is formed at the connection portion between the intermediate tube 122 and the mounting tube 92. The insertion part 201 is inserted into the injection cylinder part 11 so as to ensure a slight gap S3 in the upper part of the internal space of the injection cylinder part 11. Thereby, the space volume in the injection cylinder part 11 can also be made still smaller.
Further, a connection wall 123 protrudes downward from a connection portion between the intermediate cylinder 122 and the mounting cylinder 92. And the lower end part of the connection wall 123 contacts the upper end part of the main plate member 80 of the trigger part 51 from the front, thereby positioning the trigger part 51 at the foremost swing position.

  In the present embodiment, the inside of the injection cylinder portion 11 and the ejection hole 4 communicate with each other through the inside of the intermediate cylinder 122, the micro flow path 126, the supply hole 95a, the auxiliary cylinder 90, the communication hole 104, and the flow passage 102. To do. Therefore, the communication hole 104 communicates the inside of the auxiliary cylinder 90 and the ejection hole 4 as described above. In addition, the communication hole 104 also communicates the inside of the injection cylinder portion 11 and the ejection hole 4. .

  As shown in FIGS. 1 to 3, the actuating member 130 is formed integrally with the insertion portion 131 inserted into the auxiliary cylinder 90 from the rear and the insertion portion 131, and forwardly outside the auxiliary cylinder 90. A connecting portion 132 that extends toward the connecting portion 132, and a regulating portion 133 that is integrally formed with the connecting portion 132 and that is disposed in front of the trigger portion 51 and restricts the swinging of the trigger portion 51.

The insertion portion 131 is inserted from the rear into the cylinder cylinder 96 through the inside of the guide ring 97c in the cap 97, and extends in the front-rear direction.
The insertion portion 131 is disposed inside the guide ring 97c, is guided by the guide ring 97c so as to be movable backward, and extends further forward from the first insertion portion 135. A cylindrical second insertion portion 136 having a diameter smaller than that of the first insertion portion 135 is formed in a two-stage cylindrical shape.

A step portion having an annular wall 137 facing forward is formed at a connection portion between the first insertion portion 135 and the second insertion portion 136. The annular wall 137 is disposed farther rearward than the locked portion 110 b of the rod 110 of the plunger 91. The second insertion portion 136 is inserted into the rod 110 of the plunger 91 from the rear. Thereby, the plunger 91 can be moved backward in the auxiliary cylinder 90 while being guided by the second insertion portion 136.
When the plunger 91 moves backward from the most advanced position and reaches the position immediately before the last retreat, the locked portion 110b of the rod 110 is locked from the front with respect to the annular wall 137.

  The connection portion 132 is disposed behind the cap inner cylinder 97a, and is integrally formed at the rear end portion of the first insertion portion 135. The connection portion 132 extends downward from the connection plug 140 and then bends further. A first connection piece 141 formed in an L shape in a side view as viewed from the left and right direction, a second connection piece 142 extending from the first connection piece 141 in the left and right direction, and a second connection A third connection piece 143 extending from the piece 142 toward the front side of the vertical supply cylinder portion 10.

The connection plug 140 is in contact with the rear end opening edge of the cap inner cylinder 97a from the rear, and defines the amount of insertion of the insertion portion 131 into the cylinder cylinder 96 toward the front.
The restricting portion 133 is formed integrally with the third connection piece 143 and is disposed in front of the trigger portion 51. Specifically, the restricting portion 133 is disposed below the intermediate cylinder 122, and is formed from a front wall 133a formed to have a width equal to the width along the left-right direction of the front wall portion 95, and from the lower end portion of the front wall 133a. And a side wall 133c extending rearward from the left and right sides of the front wall 133a and integrally connected to the lower wall 133b. .

Therefore, the inside of the restricting portion 133 is hollow surrounded by the front wall 133a, the lower wall 133b, and the side wall 133c, and the connection wall 123 can be accommodated. A protruding piece 133d extending downward is formed at the rear end of the lower wall 133b. The protruding piece 133d is arranged in a state of approaching or abutting from the front with respect to the upper end portion of the trigger portion 51.
As shown in FIG. 2, the upper end edge of the front wall 133a is formed in a curved shape that is depressed downward, and the lower end edge of the front wall portion 95 of the auxiliary cylinder 90 is formed in a curved shape that protrudes downward. The upper end edge of the front wall 133a and the lower end edge of the front wall portion 95 of the auxiliary cylinder 90 are close to each other.

(Operation of trigger type liquid ejector)
Next, the case where the trigger type liquid ejector 1 comprised as mentioned above is used is demonstrated.
It is assumed that the liquid is filled in each part of the trigger type liquid ejector 1 by the operation of the trigger part 51 a plurality of times, and the liquid can be sucked up from the vertical supply cylinder part 10.

  When the trigger portion 51 is pulled backward against the urging force of the elastic plate portion 54, the main piston 52 moves backward with the rearward movement of the trigger portion 51, so that the liquid in the main cylinder 53 is allowed to flow through the first through hole 66. And, it can be introduced into the inner cylinder 13 of the vertical supply cylinder portion 10 through the second through hole 67. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 to close it and pushes up the discharge valve 30 to open the valve, so that the liquid is introduced into the injection cylinder portion 11 through the inner discharge hole 17 and the outer discharge hole 16. Liquid can be introduced.

  As a result, the internal pressure of the injection cylinder 11 increases, so that the liquid in the injection cylinder 11 can be introduced into the intermediate cylinder 122 and further introduced into the auxiliary cylinder 90 through the microchannel 126 and the supply hole 95a. it can. Then, as shown in FIG. 4, the plunger 91 can be moved backward from the most advanced position against the urging force of the coil spring 112, the convex portion 113 is separated from the communication hole 104, and the communication hole 104 is Can be opened.

  Therefore, the liquid can be guided to the ejection hole 4 through the communication hole 104 and the flow passage 102, and the liquid can be ejected forward from the ejection hole 4, and at the same time, the plunger 91 can be moved rearward.

  Thus, every time the trigger portion 51 is pulled backward, the liquid can be ejected from the ejection hole 4, and the plunger 91 is moved rearward to accumulate (fill) the auxiliary cylinder 90. )be able to.

When the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the trigger portion 51 is urged forward by the elastic restoring force of the elastic plate portion 54 and returned to the original position. The main piston 52 moves forward. Therefore, a negative pressure is generated in the main cylinder 53, and the liquid in the container body A can be sucked into the vertical supply cylinder portion 10 through the pipe 15 by this negative pressure.
Then, the newly sucked liquid pushes up the suction valve 36 to open it, and is introduced into the main cylinder 53. Thereby, it can prepare for the next injection. The discharge valve 30 is closed.

At this time, the supply of the liquid from the injection cylinder portion 11 into the auxiliary cylinder 90 stops, but the plunger 91 starts to move forward toward the most advanced position by the elastic restoring force of the coil spring 112. Thereby, the liquid accumulated in the auxiliary cylinder 90 can be guided to the ejection hole 4 through the communication hole 104 and the flow passage 102, and the liquid can be ejected forward through the ejection hole 4.
Thus, not only when the trigger part 51 is pulled backward, but also when the trigger part 51 is not operated, the liquid can be ejected, and the liquid can be continuously ejected.

  In particular, a communication hole 104 communicating with the ejection hole 4 and a supply hole 95a communicating with the inside of the injection cylinder portion 11 are formed in the auxiliary cylinder 90, respectively, and the plunger 91 directly closes the communication hole 104. Therefore, the spatial volume of the path from the injection cylinder 11 to the auxiliary cylinder 90 (the internal volume occupied by the path) can be easily reduced with little restriction. Therefore, when the trigger portion 51 is operated, the liquid can be immediately introduced from the injection cylinder portion 11 into the auxiliary cylinder 90, and the pressure in the auxiliary cylinder 90 is quickly raised to immediately move the plunger 91 backward. easy. Therefore, it is possible to quickly eject the liquid while suppressing the number of priming times. Therefore, it is easy to use and has excellent operability.

Further, since the plunger 91 directly closes the communication hole 104, the liquid is not ejected unless the internal pressure of the auxiliary cylinder 90 exceeds a predetermined value. Therefore, the liquid can be ejected at an appropriate pressure (injection pressure) without providing a high-pressure valve or the like, and the configuration can be easily simplified. In addition, since the pressure can be accumulated by moving the plunger 91 urged forward by the coil spring 112 backward, when the liquid is ejected, the liquid can be ejected in a state where pressure is further applied.
Further, it is possible to effectively suppress liquid leakage from the ejection holes 4 when not in use.

In addition, when the operation of pulling the trigger portion 51 is not performed again when the plunger 91 moves forward, the plunger 91 moves to the most advanced position, but the operation of pulling the trigger portion 51 may be repeatedly performed before that.
In this case, the plunger 91 gradually moves backward as a whole while repeating the backward movement and the forward movement. Thereby, the liquid can be gradually stored in the auxiliary cylinder 90. For example, by moving the plunger 91 to a position immediately before the last retreat, the liquid can be continuously ejected over a long period of time until the plunger 91 moves from the position just before the last retraction to the most advanced position.

  By the way, for example, when the plunger 91 moves to the position immediately before the last retraction by continuously repeating the operation of pulling the trigger portion 51, the locked portion 110b of the rod 110 is moved into the operating member 130 as shown in FIG. The insertion portion 131 is locked to the annular wall 137 from the front. Therefore, when the plunger 91 further moves rearward by further operation of the trigger portion 51, the entire operation member 130 moves rearward with respect to the auxiliary cylinder 90. Thereby, the projection piece 133d of the restricting portion 133 disposed in front of the trigger portion 51 can be brought into contact with or approached from the front to the trigger portion 51 that is swung rearward. You can avoid returning to

Therefore, it is possible to mechanically prevent the plunger 91 from staying at the last retracted position and moving further backward, and to prevent the auxiliary cylinder 90 from being filled with an excessive amount of liquid. Thereby, it can prevent that the pressure in the auxiliary | assistant cylinder 90 rises too much, and it can prevent that malfunctions, such as a breakage, arise. For this reason, it is easy to use, and the continuous ejection of liquid can be performed with peace of mind.
In particular, since the trigger part 51 does not return to the front, it is easy and tactile and visual to easily grasp it. Therefore, it is easy to prevent an erroneous operation such as forcibly performing further operation of the trigger unit 51.

Further, since the auxiliary cylinder 90 is disposed above the injection cylinder portion 11 and in parallel with the injection cylinder portion 11, the auxiliary cylinder 90 is arranged so as to be connected to the injection cylinder portion 11 in the front-rear direction. In comparison, it is easy to perform continuous injection for a long time by securing the stroke of the plunger 91 while shortening the overall length of the trigger type liquid ejector 1 to reduce the size.
In addition, since the space volume in the injection cylinder portion 11 and the vertical hole is further reduced by the insertion portion 201 and the plug 125, the pressure in the auxiliary cylinder 90 can be increased more quickly.
Therefore, the liquid can be ejected at a high ejection pressure, and the plunger 91 can be moved backward more smoothly.

(Second Embodiment)
Next, a second embodiment of the trigger type liquid ejector according to the present invention will be described. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 6, the trigger type liquid ejector 150 of the present embodiment does not include the operation member 130 and the insertion portion 201.
Further, the cap 197 attached to the rear end portion of the cylinder cylinder 96 includes a cap inner cylinder 197a fitted inside the cylinder cylinder 96 and a radially outer side from the rear end portion of the cap inner cylinder 197a. A locking ring 197b that protrudes and is locked from the rear to the rear end edge of the cylinder cylinder 96, and a front wall portion 197c that closes the front opening of the cap inner cylinder 197a are provided. An air hole 197d that allows the inside and outside of the auxiliary cylinder 90 to communicate with each other and allows air to enter and exit from the auxiliary cylinder 90 is formed at the center of the front wall portion 197c.

  For example, in the said 1st Embodiment, it was set as the structure combined with the ejector main body 2 by mounting | wearing the injection cylinder part 11 directly with the nozzle member 3, However, It is not limited to this case, For example, via an intermediate member The nozzle member 3 may be combined with the ejector body 2.

Specifically, as shown in FIG. 6, the trigger type liquid ejector 150 includes an intermediate member 151 that connects the nozzle member 3 and the ejector body 2.
The intermediate member 151 is located on the front side of the front opening of the injection cylinder 11 and is opposed to the front opening 160. The intermediate member 151 extends rearward from the counter plate 160, and the injection cylinder 11 A first cylinder 161 that is externally fitted, a second cylinder 162 that extends forward from the counter plate 160, and a center that is located inside the second cylinder 162 and extends forward from the counter plate 160. And a protrusion 163.
The central protrusion 163 is formed so as to fit inside the second cylinder 162 without protruding forward from the second cylinder 162.

  The second cylindrical portion 162 and the central protrusion 163 are disposed at positions that are eccentric downward with respect to the central axis of the injection cylindrical portion 11. An injection hole 164 that communicates with the front opening of the injection cylinder portion 11 is formed in a portion of the counter plate 160 that is located above the central protrusion 163 and that is located inside the second cylinder portion 162. . Thereby, the inner side of the second cylinder part 162 communicates with the inside of the injection cylinder part 11 through the injection hole 164.

The front wall portion 95 of the auxiliary cylinder 90 protrudes downward from the cylinder tube 96 so as to be positioned on the front side of the second tube portion 162 of the intermediate member 151.
In the front wall portion 95, a portion positioned below the surrounding tube 101 is formed with a third tube portion 292 that protrudes rearward and is fitted onto the second tube portion 162 of the intermediate member 151. The nozzle member 3 is integrally combined with the ejector body 2 by fitting the third tube portion 292 to the second tube portion 162. The front wall portion 95 is formed with a seal tube portion 23a that fits tightly inside the second tube portion 162.
The upper end portion of the main plate member 80 of the trigger portion 51 is in contact with the lower end portion of the intermediate member 151 from the rear by the urging by the elastic plate portion 54. Thereby, the trigger part 51 is positioned in the foremost swing position.

  A portion of the front wall portion 95 of the auxiliary cylinder 90 located below the surrounding cylinder 101 is provided with a cylindrical shaft portion 120 protruding forward, and the shaft portion 120 is disposed in the radial direction. A holding cylinder 121 that surrounds from the outside protrudes forward. The shaft part 120 is formed in the center part of the front wall part 95 in the vertical direction. The shaft part 120 and the holding cylinder 121 are arranged coaxially.

On the rear surface of the front wall portion 95 (inside the auxiliary cylinder 90), a supply hole 129 that is recessed forward is formed in a portion located below the communication hole 104.
The front wall portion 95 is formed with an annular turning circuit 177 that is positioned between the shaft portion 120 and the holding cylinder 121 and passes through the front wall portion 95.
The turning circuit 177 communicates with the inside of the second cylindrical portion 162 of the intermediate member 151 and is positioned in front of the auxiliary piston 111 in the auxiliary cylinder 90 through the supply hole 129 formed in the front wall portion 95. It communicates with the space to be. Thereby, the inside of the auxiliary cylinder 90 communicates with the inside of the injection cylinder part 11 through the supply hole 129, the turning circuit 177, the inside of the second cylinder part 162, and the injection hole 164.

  Since the rear end portion of the shaft portion 120 is integrally connected to the cylinder cylinder 96, the turning circuit 177 can be formed in an annular shape. However, instead of the circular turning circuit 177, for example, holes are formed in the front wall portion 95 so as to communicate with the inside of the second tube portion 162 and the auxiliary cylinder 90, respectively, and these hole portions are connected to the shaft portion 120 and the holding tube. You may make it communicate through the clearance gap between 121.

The holding cylinder 121 is held by being fitted with a top-cylindrical blind cap 127 from the front side.
The blind cap 127 further includes an insertion cylinder 128 that is closely inserted between the shaft portion 120 and the holding cylinder 121. Thereby, the volume occupied by the space formed between the shaft part 120 and the holding cylinder 121 can be reduced as much as possible, and the liquid can be quickly moved from the inside of the second cylinder part 162 into the auxiliary cylinder 90. It is possible to make it.

In the case of the trigger type liquid ejector 150 configured as described above, the internal pressure of the injection cylinder part 11 is increased by the operation of the trigger part 51, whereby the liquid in the injection cylinder part 11 is supplied to the injection hole 164, the second. It can be introduced into the auxiliary cylinder 90 through the inside of the cylindrical portion 162, the turning circuit 177, and the supply hole 129. Thus, as in the first embodiment, every time the trigger portion 51 is pulled backward, the liquid can be ejected from the ejection hole 4, and the plunger 91 is moved rearward to move the auxiliary cylinder 90. Liquid can be stored inside. When the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the supply of the liquid from the injection cylinder portion 11 into the auxiliary cylinder 90 is stopped, but the plunger 91 is moved to the maximum by the elastic restoring force of the coil spring 112. Begins moving forward toward the forward position. Thereby, the liquid accumulated in the auxiliary cylinder 90 can be ejected forward from the ejection hole 4 through the communication hole 104 and the flow passage 102.
Moreover, since the nozzle member 3 can be combined with the ejector main body 2 using the intermediate member 151, a trigger type liquid ejector can also be comprised using the existing ejector main body. Therefore, the trigger type liquid ejector can be configured with a low cost and simple configuration.

Here, in each of the trigger type liquid ejectors 1 and 150 according to the first embodiment and the second embodiment, the direct ejection hole is not passed through the front end of the communication hole 104 formed in the front wall portion 95 without passing through the flow passage 102. You may employ | adopt the structure to which 4 was connected.
Further, instead of the trigger type liquid ejector 1 of the first embodiment, for example, when the operating member moves rearward with respect to the cylinder, the restricting portion comes into contact with the trigger portion from the rear or the side or the like. You may make it close and a trigger part cannot rock | fluctuate back.
In each of the trigger type liquid ejectors 1 and 150 according to the first embodiment and the second embodiment, for example, a mechanism for locking the operation of the trigger unit 51, or a liquid ejection form in front of the ejection hole 4 (for example, mist, foam For example, a switching member for switching the state may be provided.

(Third embodiment)
Next, a third embodiment of the trigger type liquid ejector according to the present invention will be described.

As shown in FIGS. 7 to 10, the trigger type liquid ejector 250 according to the present embodiment is mounted on a container body A that contains a liquid, and an ejector main body 2 that has a vertical supply cylinder portion 10 that sucks up the liquid. And a nozzle member 3 in which an ejection hole 4 is formed and attached to the ejector body 2.
Each component of the trigger type liquid ejector 250 is a molded product using a synthetic resin unless otherwise specified.

  In the present embodiment, the central axis of the vertical supply cylinder portion 10 is referred to as an axis O1, and the container body A side is referred to as the lower side along the axis O1, and the opposite side is referred to as the upper side. One direction orthogonal to the axis O1 is referred to as the front-rear direction, and the direction orthogonal to the direction of the axis O1 and the front-rear direction is referred to as the left-right direction.

The ejector body 2 includes the vertical supply cylinder portion 10 extending in the vertical direction, and an injection cylinder portion that extends from the vertical supply cylinder portion 10 along the front-rear direction and communicates with the inside of the vertical supply cylinder portion 10. 11 and is formed in an L shape in a side view as viewed from the left-right direction.
In the front-rear direction, the direction in which the injection cylinder part 11 extends from the vertical supply cylinder part 10 is referred to as the front side or the front side, and the opposite direction is referred to as the rear side or the rear side.

The vertical supply cylinder portion 10 includes a top cylinder-shaped outer cylinder 12 and an inner cylinder 13 fitted into the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b disposed above the large-diameter portion 12a and having a diameter smaller than that of the large-diameter portion 12a, an upper end portion of the large-diameter portion 12a, and a lower end portion of the small-diameter portion 12b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above. The upper end opening of the small diameter portion 12b is closed by the top wall portion 12d.

  The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b disposed above the large-diameter portion 13a and having a diameter smaller than that of the large-diameter portion 13a, an upper end portion of the large-diameter portion 13a, and a lower end portion of the small-diameter portion 13b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above.

In the small diameter portion 13b of the inner cylinder 13, an upper portion of a pipe 15 that is disposed in the container body A and that has a lower end opening located at a bottom portion (not shown) of the container body A is fitted. The flange portion 13c of the inner cylinder 13 is positioned below the flange portion 12c of the outer cylinder 12 in a state where a clearance S1 is secured between the flange portion 12c of the outer cylinder 12 and the flange portion 12c. In the large diameter portion 13 a of the inner cylinder 13, an annular flange portion 13 d that protrudes outward in the radial direction is formed at a portion protruding downward from the large diameter portion 12 a of the outer cylinder 12. The flange portion 13d is disposed in the upper end portion of the mounting cap 14 that is mounted (for example, screwed) to the mouth portion A1 of the container body A, and locks the upper end portion of the mounting cap 14 around its axis. The collar portion 13d is sandwiched in the vertical direction by the mounting cap 14 and the upper end opening edge at the mouth portion A1 of the container body A.
In addition, the axis O1 of the vertical supply cylinder portion 10 configured by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the container axis of the container body A.

  The rear end portion of the injection cylinder portion 11 is connected to the front side of the upper end portion of the vertical supply cylinder portion 10. The inside of the injection cylinder part 11 communicates with the inside of the vertical supply cylinder part 10 through an outer discharge hole 16 formed in the outer cylinder 12 and an inner discharge hole 17 formed in the inner cylinder 13.

Further, the ejector body 2 includes a closing member 20 that is attached to the injection cylinder portion 11 from the front side. The closing member 20 is located on the front side of the front opening of the injection cylinder 11, and is opposed to the front opening and is opposed to the front opening, and extends backward from the counter plate 21. 1st cylinder part 22 externally fitted by the part 11, 2nd cylinder part (1st mounting part) 23 extended toward the front from the opposing board part 21, and it is located inside the 2nd cylinder part 23, and opposes it And a central protrusion 24 extending forward from the plate portion 21.
The central protrusion 24 is formed so as to fit inside the second cylinder part 23 without protruding forward from the second cylinder part 23.

  The second cylinder portion 23 and the central protrusion 24 are disposed at a position that is eccentric downward with respect to the central axis of the injection cylinder portion 11. An injection hole 25 that communicates with the front opening of the injection cylinder portion 11 is formed in a portion of the counter plate portion 21 that is located above the central protrusion 24 and that is located inside the second cylinder portion 23. Yes. Thereby, the inside of the second cylinder part 23 communicates with the inside of the injection cylinder part 11 through the injection hole 25.

  On the inner side of the upper end portion of the inner cylinder 13, an annular upper tapered cylinder portion 38 is disposed. The upper tapered cylindrical portion 38 is gradually reduced in diameter as it goes downward. A spherical discharge valve 37 that is detachably seated on the inner peripheral surface of the upper taper cylinder part 38 is disposed inside the upper taper cylinder part 38. The discharge valve 37 blocks communication between a space located above the upper tapered cylindrical portion 38 in the inner cylinder 13 and a space located below the upper tapered cylindrical portion 38.

A portion of the inner peripheral surface of the inner cylinder 13 that is located below the upper taper cylinder part 38 and that is located above the upper end of the pipe 15 has an annular lower taper cylinder part 35 projecting inward. Is formed.
The lower tapered cylindrical portion 35 is gradually reduced in diameter as it goes downward. A spherical suction valve 36 that is detachably seated on the inner peripheral surface of the lower taper cylinder 35 is disposed inside the lower taper cylinder 35. In the inner cylinder 13, the suction valve 36 communicates and blocks a space positioned above the lower tapered cylinder portion 35 and a space positioned below the lower tapered cylinder portion 35.

In the outer cylinder 12, a cylinder cylinder portion 40 that protrudes forward is integrally formed at a portion located below the injection cylinder portion 11.
The cylinder cylinder portion 40 is open toward the front, and is partially formed integrally with the flange portion 12c of the outer cylinder 12.

  The ejector main body 2 extends downward from the injection cylinder portion 11 and moves in the front-rear direction in conjunction with the trigger portion 51 disposed so as to be swingable rearward in a forward-biased state. The main piston 52, the main cylinder 53 whose inside is pressurized and depressurized as the main piston 52 moves, the elastic plate part 54 that urges the trigger part 51 forward, the vertical supply cylinder part 10, and the injection cylinder part 11 and a cover body 55 that covers the entire auxiliary cylinder 90, which will be described later, from above, from behind, and from the left and right.

  Further, the discharge valve 37, the suction valve 36, the trigger part 51, the main piston 52, the main cylinder 53, and the elastic plate part 54 described above allow liquid to be supplied from the inside of the vertical supply cylinder part 10 by swinging the trigger part 51 backward. A trigger mechanism 50 is configured to be introduced into the injection cylinder portion 11 and injected from the injection cylinder portion 11 toward the ejection hole 4 side.

  The main cylinder 53 protrudes forward from the outer cylinder part 60 that opens toward the front, the rear wall part 61 that closes the rear opening of the outer cylinder part 60, and the central part of the rear wall part 61. And a piston guide 62 whose front end is closed.

  The piston guide 62 has an opening rearward inside, and a fitting cylinder portion 241 projecting forward from the rear wall (the small diameter portion 12b of the outer cylinder 12) of the cylinder cylinder portion 40 is provided in the opening. It is mated. The inside of the fitting cylinder portion 241 communicates with the guide hole 62 a penetrating the front end wall of the piston guide 62 through the inside of the piston guide 62. Furthermore, the inside of the fitting cylinder part 241 is defined between the flange part 12c of the outer cylinder 12 and the flange part 13c of the inner cylinder 13 through a communication groove 41a formed on the inner peripheral surface of the small diameter part 12b of the outer cylinder 12. It communicates with the gap S1.

  The outer cylinder part 60 is fitted inside the cylinder cylinder part 40. The inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60 are in close contact with each other at both ends in the front-rear direction. On the other hand, an annular gap S2 is secured in an intermediate portion located between both end portions in the front-rear direction, between the inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60. .

  The outer cylinder part 60 is formed with a first air vent 63 that allows the inside of the outer cylinder part 60 to communicate with the gap S2. The flange portion 12c of the outer cylinder 12 is formed with a through-cylinder 264 that communicates the clearance S2 with the large-diameter portion 13a of the inner cylinder 13 and the inside of the mounting cap 14. The through-cylinder 264 extends downward from the cylinder cylinder portion 40. A third vent hole 65 through which the through cylinder 264 is inserted is formed in the flange portion 13 c of the inner cylinder 13. The third vent hole 65 communicates the gap S <b> 1 with the large diameter portion 13 a of the inner cylinder 13 and the inner side of the mounting cap 14.

A first through hole 66 penetrating in the front-rear direction is formed in the rear wall portion 61 of the main cylinder 53 at a portion located above the piston guide 62. In the illustrated example, a cylindrical portion protruding rearward is formed at the opening peripheral edge portion of the first through hole 66 in the rear wall portion 61, and this cylindrical portion is formed in the small diameter portion 12 b of the outer cylinder 12. Is fitted into the through-hole. The first through hole 66 communicates with the space located between the discharge valve 37 and the suction valve 36 in the inner cylinder 13 through the second through hole 67 formed in the inner cylinder 13 of the vertical supply cylinder portion 10. doing.
Thereby, the inside of the main cylinder 53 communicates with the space located between the discharge valve 37 and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. Accordingly, the discharge valve 37 switches communication between the injection cylinder portion 11 and the main cylinder 53 and shuts off the same, and the suction valve 36 switches communication between the container body A and the main cylinder 53 and shuts it off.

The main piston 52 includes a columnar connecting part 70 connected to the trigger part 51, and a piston cylinder 71 located behind the connecting part 70 and having a larger diameter than the connecting part 70, and as a whole. It is formed in a cylindrical shape that opens rearward.
The main cylinder 53 and the main piston 52 are disposed on a common axis (not shown) extending along the front-rear direction.

  The piston cylinder 71 has a piston main body 72 that opens rearward and into which the piston guide 62 is inserted. The piston cylinder 71 projects outward from the rear end of the piston main body 72 in the radial direction. A sliding cylinder portion 73 that is in close sliding contact with the inner peripheral surface of the portion 60.

  The piston main body 72 is closely fitted to the piston guide 62. In the illustrated example, the rear end of the piston main body 72 is fitted to the piston guide 62 so as to be slidable in the front-rear direction. Thereby, in the main cylinder 53, the liquid from the vertical supply cylinder part 10 is introduce | transduced in the storage chamber 53a located in the back side rather than the sliding cylinder part 73. FIG. The piston main body 72 communicates with the piston guide 62 through the guide hole 62a.

  The sliding cylindrical portion 73 is formed in a tapered shape that gradually increases in diameter from the central portion in the front-rear direction toward the front and rear, and the lip portions 73a positioned at both ends in the front-rear direction are the inner peripheral surface of the outer cylindrical portion 60 In sliding contact with

  The connecting portion 70 of the main piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. Thereby, the main piston 52 is urged forward by the urging force of the elastic plate portion 54 together with the trigger portion 51, and moves rearward in the main cylinder 53 as the trigger portion 51 moves rearward. Pushed in.

  Further, when the trigger portion 51 is at the foremost swing position, the sliding cylinder portion 73 of the main piston 52 closes the first vent hole 63. When the main piston 52 moves backward by a predetermined amount due to the backward swing of the trigger portion 51, the sliding cylinder portion 73 opens the first vent hole 63. Thereby, the inside of the container body A communicates with the outside through the inside of the through-cylinder 264, the gap S <b> 2 and the first vent hole 63.

  The trigger portion 51 has a main plate member 80 having a front surface that is concavely curved toward the rear in a side view as viewed from the left and right directions, and a pair of side plate members 81 that stand rearward from the left and right side edge portions of the main plate member 80. And.

A pair of connecting plates 82 are formed at the upper end portions of the pair of side plate members 81 so as to extend upward to the side of the injection tube portion 11 and sandwich the injection tube portion 11 from the left-right direction. The pair of connecting plates 82 are provided with a rotating shaft portion 83 projecting outward in the left-right direction. These rotary shaft portions 83 are rotatably supported by bearing portions provided on an upper plate member 84 that covers the upper side of the injection cylinder portion 11.
Thereby, the trigger part 51 can be swung in the front-rear direction around the rotation shaft part 83.

The trigger 51 is formed with an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 is formed so as to extend rearward from the peripheral edge of the opening 51a.
A pair of connecting shafts 86 projecting in the left-right direction toward the inner side of the connecting cylinder 85 are formed on a portion of the inner peripheral surface of the connecting cylinder 85 positioned on the rear side. These connecting shafts 86 are inserted into connecting holes formed in the connecting portion 70 of the main piston 52. Thereby, the trigger part 51 and the main piston 52 are mutually connected.

  The connecting portion 70 of the main piston 52 is connected to the connecting shaft 86 so as to be rotatable about its axis and movable by a predetermined amount in the vertical direction. Thereby, the main piston 52 can be moved back and forth as the trigger portion 51 swings in the front-rear direction.

The horizontal plate-like upper plate member 84 connected to the top wall portion 12 d 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 elastic plate portions 54 are integrally formed on both the left and right sides of the upper plate member 84 so as to be formed in an arc shape that is convex forward in a side view as viewed from the left and right directions and that extends to below the injection cylinder portion 11. Yes.
The elastic plate portion 54 is formed in a circular arc shape that is concentric with each other when viewed from the side in the left-right direction, and includes a pair of leaf springs arranged in the front-rear direction.

Of the pair of leaf springs, the leaf spring located on the front side is the main leaf spring 54a, and the leaf spring located on the rear side is the sub leaf spring 54b.
The lower ends of the main leaf spring 54a and the sub leaf spring 54b are integrally connected via an arcuate folded portion 54c. A locking piece 54d projects downward from the folded portion 54c, and the locking piece 54d is inserted into and engaged with a pocket portion 81a formed in the side plate member 81 of the trigger portion 51 from above. ing.
Thereby, the elastic board part 54 is urging | biasing the trigger part 51 toward the front via the locking piece 54d and the pocket part 81a.

The upper end portion of the main plate member 80 of the trigger portion 51 is in contact with the lower end portion of the closing member 20 from behind by the urging by the elastic plate portion 54. Thereby, the trigger part 51 is positioned in the foremost swing position.
When the trigger portion 51 is pulled backward from the foremost swing position, the elastic plate portion 54 is elastically deformed so as to move the folded portion 54c backward via the locking piece 54d. At this time, in the elastic plate portion 54, the sub leaf spring 54b is elastically deformed larger than the main leaf spring 54a.

  Even when the trigger portion 51 is pulled rearward, the locking piece 54d is engaged with the pocket portion 81a until the trigger portion 51 reaches the rearmost swinging position while being pulled upward from the pocket portion 81a. Maintain a consistent state.

  The nozzle member 3 is mainly disposed in front of and above the ejector body 2. As shown in FIG. 7, the nozzle member 3 connects the nozzle body 220 in which the ejection holes 4 are formed, the auxiliary cylinder 90 extending in the front-rear direction, the nozzle body 220 and the auxiliary cylinder 90, and the ejector. A connecting body 230 attached to the main body 2, a plunger 91 accommodated in the auxiliary cylinder 90, an exterior cylinder 192 that extends in the front-rear direction and is sheathed by the auxiliary cylinder 90, and a passage cylinder 93 that extends downward from the exterior cylinder 192. It is equipped with.

  The connecting body 230 includes a third cylinder part (second attachment part) 231 attached to the second cylinder part 23 of the ejector body 2, a connecting cylinder part 232 protruding forward from the third cylinder part 231, and a connecting cylinder. A branch cylinder part 233 projecting upward from the part 232, a covering wall part 134 closing the front end opening of the connecting cylinder part 232, and a mounting cylinder part (fourth mounting part) 235 projecting forward from the covering wall part 134 It is equipped with.

The third cylinder part 231 is fitted on the second cylinder part 23, and the inside of the connecting cylinder part 232 is a passage space 236 that communicates with the injection cylinder part 11 through the second cylinder part 23.
The covering wall portion 134 is formed in an elliptical shape that is long in the vertical direction when viewed from the front and rear, and covers the third cylindrical portion 231, the connecting cylindrical portion 232, and the branch cylindrical portion 233 from the front. A communication hole 237 that connects the passage space 236 and the ejection hole 4 is formed in the covering wall portion 134.
The communication hole 237 is directly connected to the front end of the passage space 236 and opens toward the front end opening of the injection cylinder portion 11 through the passage space 236, the second cylinder portion 23, and the injection hole 25. Further, the communication hole 237 and the front end opening of the injection cylinder portion 11 are opposed to each other in the front-rear direction.

The nozzle body 220 extends in the front-rear direction, and closes the front end of the external fitting cylinder part (third attachment part) 221 that is externally fitted to the attachment cylinder part 235, and an ejection hole in the center. 4, a pressure accumulation chamber 223 defined on the rear side of the nozzle wall 222, a pressure accumulation valve 124 and a metal coil spring 225 accommodated in the pressure accumulation chamber 223, and an ejection hole 4 And a lid 226 that can be opened and closed from the front. The nozzle body 220 is coupled to the auxiliary cylinder 90 via the coupling body 230 by fitting the mounting cylinder part 235 and the external fitting cylinder part 221.
The external fitting cylinder part 221 of the nozzle body 220 is formed to be attachable to the second cylinder part 23 of the ejector body 2. In the illustrated example, the outer fitting cylinder portion 221 of the nozzle body 220 is formed so as to be fitted on the second cylinder portion 23 of the ejector body 2.

The pressure accumulation valve 124 is urged forward by a coil spring 225 to close the ejection hole 4. The second half of the pressure accumulation valve 124 forms a small diameter piston portion 124a, and the front half of the pressure accumulation valve 124 forms a large diameter piston portion 124b. The pressure accumulation valve 124 causes the pressure of the liquid introduced from the communication hole 237 to act on both the piston portions 124a and 124b. When this pressure exceeds a certain level, the pressure accumulation valve 124 moves backward due to the difference in diameter between the piston portions 124a and 124b, and the ejection hole 4 is opened.
The upper end portion of the lid portion 226 is attached to the nozzle wall portion 222 so as to be rotatable around an opening / closing axis extending in the left-right direction. The lid part 226 opens the ejection hole 4 by rotating toward the front around the opening / closing axis.

  The auxiliary cylinder 90 is disposed above the injection cylinder portion 11 and extends in the front-rear direction. Thereby, the auxiliary cylinder 90 is arranged in parallel to the injection cylinder part 11. The auxiliary cylinder 90 includes a front wall portion 95 and a cylinder tube 96 extending rearward from the front wall portion 95, and is formed in a cylindrical shape opened rearward.

The front wall portion 95 is provided with a supply tube portion 297 that is attached to the branch tube portion 233. The supply cylinder part 297 has a shape that protrudes forward from the front wall part 95 and then bends downward, and is fitted in the branch cylinder part 233. The inside of the supply cylinder part 297 is a supply hole 198 that allows the inside of the injection cylinder part 11 and the auxiliary cylinder 90 to communicate with each other. The channel cross-sectional area of the supply hole 198 is larger than the channel cross-sectional area of the communication hole 237.
The flow passage cross-sectional area of the passage space 236 gradually decreases from the rear on the second cylindrical portion 23 side toward the front on the communication hole 237 side. The channel cross-sectional area at the front end of the passage space 236 is equal to the channel cross-sectional area of the communication hole 237.
The cylinder cylinder 96 is disposed on the upper plate member 84 of the ejector body 2 via the exterior cylinder 192 and protrudes rearward from the vertical supply cylinder portion 10.

  The exterior cylinder 192 includes a main body cylinder 199 fitted on the cylinder cylinder 96, a rear wall portion 200 that closes the rear end opening of the main body cylinder 199, and a rear wall section 200 that projects forward from the rear wall section 200. And a seal tube portion 203 fitted in the end portion. The rear wall portion 200 is formed with an air hole 202 that allows the inside and outside of the auxiliary cylinder 90 to communicate with each other and allows air to enter and exit the auxiliary cylinder 90.

The plunger 191 includes a rod 210 and an auxiliary piston 211 fitted to the front end portion of the rod 210, and is accommodated in the auxiliary cylinder 90 so as to be movable rearward in a forward biased state.
The rod 210 is formed in a cylindrical shape that extends in the front-rear direction and opens rearward, and a flange portion 210a that protrudes outward in the radial direction is formed on the outer peripheral surface. The auxiliary piston 211 is formed in a cylindrical shape extending in the front-rear direction and opened rearward, and at both ends in the front-rear direction, gradually extends toward the outer side in the radial direction toward the outer side in the front-rear direction. A lip portion 211 a that has a tapered shape and is in close sliding contact with the inner peripheral surface of the cylinder cylinder 96 is formed.

Between the plunger 191 and the exterior cylinder 192, for example, a metal coil spring 112 is disposed in a state of extending in the front-rear direction and being compressed in the front-rear direction.
The coil spring 112 is disposed so as to surround the rod 210, and the rear end portion comes into contact with the rear wall portion 200 of the exterior cylinder 192 from the front, and the front end portion comes into contact with the flange portion 210 a of the rod 210 from the rear. Thus, the coil spring 112 biases the plunger 191 forward in the auxiliary cylinder 90.

  The passage tube 93 is arranged side by side with the vertical supply tube portion 10 in the left-right direction. The passage cylinder 93 extends straight in the up-down direction and is shifted in the left-right direction with respect to the central axis O1. As shown in FIG. 9, the lower end portion of the passage cylinder 93 is closely mounted in a mounting hole 93 a provided in the flange portion 12 c of the outer cylinder 12. The 3 vent hole 65 communicates with the inside of the large diameter portion 13 a of the inner cylinder 13 and the mounting cap 14. In the example shown in the figure, the mounting hole 93a is configured by the inside of a cylindrical body 93b erected on the flange portion 12c. The upper end portion of the passage cylinder 93 is connected to the main body cylinder 199 of the exterior cylinder 192, and the communication path 116 in the passage cylinder 93 and the interior of the exterior cylinder 192 communicate with each other.

  In the present embodiment, in the auxiliary cylinder 90, a recovery passageway 213 communicating with the inside of the container body A is opened at a portion spaced rearward from the front wall portion 95. The recovery passageway 213 communicates with the recovery hole 114 that penetrates a portion of the cylinder tube 96 that is spaced rearward from the front wall portion 95 in the radial direction, the recovery hole 114, and the outer peripheral surface of the cylinder tube 96 and the outer tube 192. A communication gap 115 provided between the inner periphery of the main body cylinder 199 and a communication path 116 provided in the passage cylinder 93 and communicating between the communication gap 115 and the container body A are provided. The collection hole 114 is closed from the inside of the auxiliary cylinder 90 by the plunger 191 at the most advanced position. The plunger 191 at the most forward position is in contact with the front wall portion 95 from the rear side, so that further forward movement in the auxiliary cylinder 90 is restricted.

  When the nozzle member 3 is attached to the ejector body 2, the outer cylinder 192 with the auxiliary cylinder 90 attached is assembled from above to the ejector body 2 to which the connecting body 230 is attached. At this time, the passage cylinder 93 is fitted into the mounting hole 93 a while the supply cylinder 297 is fitted into the branch cylinder 233. As a result, in addition to assembling the nozzle body 220 to the ejector body 2 from the front via the connecting body 230, the auxiliary cylinder 90 and the nozzle body 220 are attached to the ejector body 2 and the nozzle body 220 thus assembled together. By assembling the outer cylinder 192 from above, the nozzle member 3 can be attached to the ejector body 2 and the assembling work can be simplified.

(Operation of trigger type liquid ejector)
Next, the case where the trigger type liquid ejector 250 configured as described above is used will be described.
The lid 226 is opened, the ejection hole 4 is opened, and liquid is filled in each part of the trigger type liquid ejector 250 by the operation of the trigger part 51 a plurality of times, and the liquid is supplied from the vertical supply cylinder part 10. It shall be in a state where it can be sucked up.

  When the trigger part 51 is pulled backward against the urging force of the elastic plate part 54, the main piston 52 moves backward with the backward movement of the trigger part 51, so that the liquid in the main cylinder 53 (within the storage chamber 53a) is discharged. The first through hole 66 and the second through hole 67 can be introduced into the inner cylinder 13 of the vertical supply cylinder portion 10. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 and closes it, and pushes up the discharge valve 37 to open the valve, so that the liquid is introduced into the injection cylinder portion 11 through the inner discharge hole 17 and the outer discharge hole 16. Can be introduced.

  As a result, the internal pressure of the injection cylinder part 11 rises, so that the liquid in the injection cylinder part 11 is introduced into the second cylinder part 23 through the injection hole 25, and further, the auxiliary cylinder 90 through the passage space 236 and the supply hole 198. Can be introduced in. Then, the plunger 191 can be moved backward from the most advanced position against the urging force of the coil spring 112. At this time, the liquid in the injection cylinder 11 can be guided to the ejection hole 4 through the passage space 236, the communication hole 237, and the pressure accumulation chamber 223, and the liquid can be ejected forward from the ejection hole 4. The plunger 191 can be moved rearward.

  Thus, every time the trigger portion 51 is pulled backward, the liquid can be ejected from the ejection hole 4 and the plunger 191 can be moved rearward to accumulate the liquid in the auxiliary cylinder 90. .

When the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the trigger portion 51 is urged forward by the elastic restoring force of the elastic plate portion 54 and returned to the original position. The main piston 52 moves forward. Therefore, a negative pressure is generated in the main cylinder 53 (in the storage chamber 53a), and the liquid in the container body A can be sucked into the vertical supply cylinder portion 10 through the pipe 15 by this negative pressure.
Then, the newly sucked liquid pushes up the suction valve 36 to open it, and is introduced into the main cylinder 53. Thereby, it can prepare for the next injection.

At this time, the supply of the liquid in the main cylinder 53 (in the storage chamber 53a) to the injection cylinder 11 through the vertical supply cylinder 10 is stopped. As a result, the liquid from the injection cylinder 11 to the passage space 236 is stopped. Since the supply is stopped, in the configuration like the conventional trigger type liquid ejector, the ejection of the liquid is stopped. However, in the trigger type liquid ejector 250, the plunger 191 starts to move forward toward the most advanced position by the elastic restoring force of the coil spring 112. Thereby, the liquid accumulated in the auxiliary cylinder 90 can be guided to the ejection hole 4 through the supply hole 198, the passage space 236, the communication hole 237 and the pressure accumulating chamber 223, and the liquid can be ejected forward through the ejection hole 4. At this time, even if the liquid in the auxiliary cylinder 90 tries to flow backward from the passage space 236 to the vertical supply cylinder 10 side, the liquid can be controlled by pushing down the discharge valve 37 and closing it. it can.
Thus, not only when the trigger part 51 is pulled backward, but also when the trigger part 51 is not operated, the liquid can be ejected, and the liquid can be continuously ejected.

Note that, when the plunger 191 moves forward, unless the operation of pulling the trigger portion 51 again is performed, the plunger 191 moves to the most advanced position, but before that, the operation of pulling the trigger portion 51 may be repeated.
In this case, the plunger 191 gradually moves backward as a whole while repeating backward movement and forward movement. Thereby, the liquid can be gradually stored in the auxiliary cylinder 90. Then, by moving the plunger 191 to the last retracted position, the liquid can be continuously ejected over a long period of time until the plunger 191 moves from the last retracted position to the most advanced position.

  Here, when the plunger 191 is retracted to the rear side of the auxiliary cylinder 90 where the collection passage 213 opens, the space in the auxiliary cylinder 90 in which the liquid is stored communicates with the container body A through the collection passage 213. To do. At this time, even if the liquid in the injection cylinder 11 is further introduced into the auxiliary cylinder 90, the liquid can be returned into the container body A through the recovery passage 213. Thereby, it is possible to prevent the pressure in the auxiliary cylinder 90 from rising excessively, and to prevent problems such as breakage. For this reason, it is easy to use, and the continuous ejection of liquid can be performed with peace of mind.

  In this way, in a state where the plunger 191 is retracted to the rear side of the auxiliary cylinder 90 where the recovery passage 213 opens, even if liquid is introduced into the auxiliary cylinder 90, the liquid passes through the recovery passage 213. By returning to the container body A, the plunger 191 continues to be located at an equivalent position in the front-rear direction with respect to the auxiliary cylinder 90. Thereby, the further retreat of the plunger 191 is substantially regulated, and the plunger 191 can be maintained in a state of being separated forward from the rear wall portion 200 of the exterior cylinder 192.

  Moreover, since the external fitting cylinder part 221 of the nozzle body 220 is formed to be attachable to the second cylinder part 23 of the ejector body 2, the nozzle member 3 includes the auxiliary cylinder 90, the plunger 191, and the third cylinder part 231. And the mounting cylinder portion 235 and the like, but only the nozzle body 220, and the external fitting cylinder portion 221 of the nozzle body 220 is attached to the second cylinder portion 23 of the ejector body 2 The trigger type liquid ejector can be used as it is without changing the design.

  Further, since the communication hole 237 opens toward the front end opening of the injection cylinder part 11, when the trigger part 51 is pulled backward, a part of the liquid from the injection cylinder part 11 is supplied to the supply hole 198. In addition, it is possible to directly reach the ejection hole 4 through the communication hole 237 without passing through the auxiliary cylinder 90, and the liquid can be stably ejected even before the liquid is accumulated in the auxiliary cylinder 90. it can.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In the third embodiment, the communication passage 116 communicates with the inside of the large-diameter portion 13a of the inner cylinder 13 and the mounting cap 14 through the gap S1 and the third ventilation hole 65, and as a result, communicates with the inside of the container body A. However, the present invention is not limited to this. For example, the communication path 116 is open in a portion of the vertical supply cylinder portion 10 located below the suction valve 36 and communicates with the container body A through the vertical supply cylinder portion 10 and the pipe 15. May be.

  In the third embodiment, for example, a mechanism for locking the operation of the trigger portion 51 and a switching member for switching the liquid ejection form (for example, mist, foam, etc.) in front of the ejection hole 4 may be further provided. Absent. For example, as a mechanism for locking the operation of the trigger portion 51, the operation is locked when the ejection hole 4 is closed by the lid portion 226, and the operation is performed when the ejection hole 4 is opened from the lid portion 226. An acceptable configuration can be employed.

In the third embodiment, the nozzle member 3 includes the coupling body 230, and the auxiliary cylinder 90 communicates with the communication hole 237 through the supply hole 198 and the passage space 236. However, the present invention is not limited to this. .
For example, the inside of the auxiliary cylinder 90 is connected to the communication hole 237 by providing the communication hole 237 in the front wall portion 95 of the auxiliary cylinder 90 while allowing the inside of the auxiliary cylinder 90 to communicate with the injection cylinder portion 11 through the supply hole 198. You may make it communicate directly, without letting the hole 198 pass. Thus, the nozzle member 3 can be appropriately changed to another form in which the communication hole 237 that communicates the inside of the injection cylinder portion 11 and the auxiliary cylinder 90 and the ejection hole 4 is formed. For example, the nozzle member extends in the front-rear direction, communicates with the inside of the injection cylinder part through the supply hole, and has a communication hole formed in the front wall part that communicates with the ejection hole. It is possible to employ a configuration in which the piston is accommodated so as to be movable rearwardly and a mounting body attached to the ejector body, and the piston closes the communication hole so as to be freely opened.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

(Fourth embodiment)
Next, a fourth embodiment of the trigger type liquid ejector according to the present invention will be described.

As shown in FIG. 11, a trigger type liquid ejector 350 according to the present embodiment is mounted on a container body A that stores a liquid, and includes an ejector main body 2 having a vertical supply cylinder portion 10 that sucks the liquid, and an ejection hole. 4 and a nozzle member 3 mounted on the ejector body 2.
Each component of the trigger type liquid ejector 350 is a molded product using a synthetic resin unless otherwise specified.

  Here, in the present embodiment, the central axis of the vertical supply cylinder portion 10 is defined as an axis O1, and the container body A side is referred to as the lower side along the axis O1, and the opposite side is referred to as the upper side. One direction orthogonal to the axis O1 is referred to as the front-rear direction, and the direction orthogonal to the direction of the axis O1 and the front-rear direction is referred to as the left-right direction.

The ejector body 2 includes the vertical supply cylinder portion 10 extending in the vertical direction, and an injection cylinder portion that extends from the vertical supply cylinder portion 10 along the front-rear direction and communicates with the inside of the vertical supply cylinder portion 10. 11 and is formed in an L shape in a side view as viewed from the left-right direction.
In the front-rear direction, the direction in which the injection cylinder part 11 extends from the vertical supply cylinder part 10 is referred to as the front side or the front side, and the opposite direction is referred to as the rear side or the rear side.

The vertical supply cylinder portion 10 includes a top cylinder-shaped outer cylinder 12 and an inner cylinder 13 fitted into the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b disposed above the large-diameter portion 12a and having a diameter smaller than that of the large-diameter portion 12a, an upper end portion of the large-diameter portion 12a, and a lower end portion of the small-diameter portion 12b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above. The upper end opening of the small diameter portion 12b is closed by the top wall portion 12d.

  The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b disposed above the large-diameter portion 13a and having a diameter smaller than that of the large-diameter portion 13a, an upper end portion of the large-diameter portion 13a, and a lower end portion of the small-diameter portion 13b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above.

In the small diameter portion 13b of the inner cylinder 13, an upper portion of a pipe 15 that is disposed in the container body A and that has a lower end opening located at a bottom portion (not shown) of the container body A is fitted. The flange portion 13c of the inner cylinder 13 is positioned below the flange portion 12c of the outer cylinder 12 in a state where a clearance S1 is secured between the flange portion 12c of the outer cylinder 12 and the flange portion 12c. In the large diameter portion 13 a of the inner cylinder 13, an annular flange portion 13 d that protrudes outward in the radial direction is formed at a portion protruding downward from the large diameter portion 12 a of the outer cylinder 12. The flange portion 13d is disposed in the upper end portion of the mounting cap 14 that is mounted (for example, screwed) to the mouth portion A1 of the container body A, and locks the upper end portion of the mounting cap 14 around its axis. The collar portion 13d is sandwiched in the vertical direction by the mounting cap 14 and the upper end opening edge at the mouth portion A1 of the container body A.
In addition, the axis O1 of the vertical supply cylinder portion 10 configured by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the container axis of the container body A.

  The rear end portion of the injection cylinder portion 11 is connected to the front side of the upper end portion of the vertical supply cylinder portion 10. The inside of the injection cylinder part 11 communicates with the inside of the vertical supply cylinder part 10 through an outer discharge hole 16 formed in the outer cylinder 12 and an inner discharge hole 17 formed in the inner cylinder 13.

A discharge valve 30 that is elastically deformable in the vertical direction is disposed on the inner side of the upper end portion of the inner cylinder 13.
The discharge valve 30 is fitted in the inner cylinder 13, is disposed below the base part 31 with the base part 31 in contact with the lower surface of the top wall part 12 d of the outer cylinder 12, and has a step on the inner peripheral surface of the inner cylinder 13. And a hollow spring portion 34 that vertically connects the base portion 31 and the valve body 33 to the valve seat 32 formed in a shape.

The valve body 33 is pressed from above by the hollow spring portion 34 and is in close contact with the valve seat 32. Accordingly, the valve body 33 blocks communication between the space located above the valve seat 32 in the inner cylinder 13 and the space located below the valve seat 32.
The valve body 33 rises against the urging force of the hollow spring portion 34 and is separated from the valve seat 32, so that a space located above the valve seat 32 in the inner cylinder 13 and the valve seat 32. Also communicates with the space located below.

A portion of the inner peripheral surface of the inner cylinder 13 positioned below the valve seat 32 and positioned above the upper end of the pipe 15 is formed with an annular tapered cylindrical portion 35 that protrudes inward. Yes.
The tapered cylindrical portion 35 is gradually reduced in diameter as it goes downward. A spherical suction valve 36 that is detachably seated on the inner peripheral surface of the tapered cylindrical portion 35 is disposed inside the tapered cylindrical portion 35. In the inner cylinder 13, the suction valve 36 communicates and blocks a space located above the tapered cylinder part 35 and a space located below the taper cylinder part 35.

In the outer cylinder 12, a cylinder cylinder portion 40 that protrudes forward is integrally formed at a portion located below the injection cylinder portion 11.
The cylinder cylinder portion 40 is open toward the front, and is partially formed integrally with the flange portion 12c of the outer cylinder 12.

  The ejector main body 2 extends downward from the injection cylinder portion 11 and moves in the front-rear direction in conjunction with the trigger portion 51 disposed so as to be swingable rearward in a forward-biased state. The main piston 52, the main cylinder 53 whose inside is pressurized and depressurized as the main piston 52 moves, the elastic plate part 54 that urges the trigger part 51 forward, the vertical supply cylinder part 10, and the injection cylinder part 11 and a cover body 55 that covers the entire auxiliary cylinder 90, which will be described later, from above, from behind, and from the left and right.

  Further, the discharge valve 30, the suction valve 36, the trigger part 51, the main piston 52, the main cylinder 53, and the elastic plate part 54 described above allow liquid to flow from the inside of the vertical supply cylinder part 10 by swinging the trigger part 51 backward. A trigger mechanism 50 is configured to be introduced into the injection cylinder portion 11 and to be injected from the injection cylinder portion 11 to the ejection hole 4 side.

  The main cylinder 53 protrudes forward from the outer cylinder part 60 that opens toward the front, the rear wall part 61 that closes the rear opening of the outer cylinder part 60, and the central part of the rear wall part 61. And a piston guide 62 whose front end is closed.

The piston guide 62 is opened rearward on the inside, and a fitting protrusion 41 projecting forward from the rear wall (the small diameter portion 12b of the outer cylinder 12) of the cylinder cylinder portion 40 is provided in the opening. It is mated.
The outer cylinder part 60 is fitted inside the cylinder cylinder part 40. The inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60 are in close contact with each other at both ends in the front-rear direction. On the other hand, an annular gap S2 is secured in an intermediate portion located between both end portions in the front-rear direction, between the inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60. .

  The outer cylinder part 60 is formed with a first air vent 63 that allows the inside of the outer cylinder part 60 to communicate with the gap S2. A second ventilation hole 64 that communicates the gap S2 with the flange portion 12c of the outer cylinder 12 and the gap S1 defined between the flange portion 12c of the outer cylinder 12 and the flange portion 13c of the inner cylinder 13. Is formed. Further, the flange portion 13 c of the inner cylinder 13 is formed with a third vent hole 65 that allows the gap S <b> 1 to communicate with the large diameter portion 13 a of the inner cylinder 13 and the inside of the mounting cap 14.

A first through hole 66 penetrating in the front-rear direction is formed in the rear wall portion 61 of the main cylinder 53 at a portion located above the piston guide 62. In the illustrated example, a cylindrical portion protruding rearward is formed at the opening peripheral edge portion of the first through hole 66 in the rear wall portion 61, and this cylindrical portion is formed in the small diameter portion 12 b of the outer cylinder 12. Is fitted into the through-hole. The first through hole 66 communicates with the space located between the discharge valve 30 and the suction valve 36 in the inner cylinder 13 through the second through hole 67 formed in the inner cylinder 13 of the vertical supply cylinder portion 10. doing.
Thereby, the inside of the main cylinder 53 communicates with the space located between the discharge valve 30 and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. Therefore, the discharge valve 30 switches communication between the inside of the injection cylinder portion 11 and the main cylinder 53 and shuts off thereof, and the suction valve 36 switches communication between the inside of the container body A and the inside of the main cylinder 53 and shuts off thereof.

The main piston 52 includes a columnar connecting part 70 connected to the trigger part 51, and a piston cylinder 71 located behind the connecting part 70 and having a larger diameter than the connecting part 70, and as a whole. It is formed in a cylindrical shape that opens rearward.
The main cylinder 53 and the main piston 52 are disposed on a common axis (not shown) extending along the front-rear direction.

  The piston cylinder 71 has a piston main body 72 that opens rearward and into which the piston guide 62 is inserted. The piston cylinder 71 projects outward from the rear end of the piston main body 72 in the radial direction. A sliding cylinder portion 73 that is in close sliding contact with the inner peripheral surface of the portion 60.

The piston main body 72 has an inner diameter larger than the outer diameter of the piston guide 62. In the illustrated example, there is a slight gap between the inner peripheral surface of the piston main body 72 and the outer peripheral surface of the piston guide 62.
The sliding cylindrical portion 73 is formed in a tapered shape that gradually increases in diameter from the central portion in the front-rear direction toward the front and rear, and the lip portions 73a positioned at both ends in the front-rear direction are the inner peripheral surface of the outer cylindrical portion 60 In sliding contact with

  The connecting portion 70 of the main piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. Thereby, the main piston 52 is urged forward by the urging force of the elastic plate portion 54 together with the trigger portion 51, and moves rearward in the main cylinder 53 as the trigger portion 51 moves rearward. Pushed in.

  Further, when the trigger portion 51 is at the foremost swing position, the sliding cylinder portion 73 of the main piston 52 closes the first vent hole 63. When the main piston 52 moves backward by a predetermined amount due to the backward swing of the trigger portion 51, the sliding cylinder portion 73 opens the first vent hole 63. Thereby, the inside of the container body A communicates with the outside through the third ventilation hole 65, the second ventilation hole 64, and the first ventilation hole 63.

  The trigger portion 51 has a main plate member 80 having a front surface that is concavely curved toward the rear in a side view as viewed from the left and right directions, and a pair of side plate members 81 that stand rearward from the left and right side edge portions of the main plate member 80. And.

A pair of connecting plates 82 are formed at the upper end portions of the pair of side plate members 81 so as to extend upward to the side of the injection tube portion 11 and sandwich the injection tube portion 11 from the left-right direction. The pair of connecting plates 82 are provided with a rotating shaft portion 83 projecting outward in the left-right direction. These rotary shaft portions 83 are rotatably supported by bearing portions provided on an upper plate member 84 that covers the upper side of the injection cylinder portion 11.
Thereby, the trigger part 51 can be swung in the front-rear direction around the rotation shaft part 83.

The trigger 51 is formed with an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 is formed so as to extend rearward from the peripheral edge of the opening 51a.
A pair of connecting shafts 86 projecting in the left-right direction toward the inner side of the connecting cylinder 85 are formed on a portion of the inner peripheral surface of the connecting cylinder 85 positioned on the rear side. These connecting shafts 86 are inserted into connecting holes formed in the connecting portion 70 of the main piston 52. Thereby, the trigger part 51 and the main piston 52 are mutually connected.

  The connecting portion 70 of the main piston 52 is connected to the connecting shaft 86 so as to be rotatable about its axis and movable by a predetermined amount in the vertical direction. Thereby, the main piston 52 can be moved back and forth as the trigger portion 51 swings in the front-rear direction.

The horizontal plate-like upper plate member 84 connected to the top wall portion 12 d 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 elastic plate portions 54 are integrally formed on both the left and right sides of the upper plate member 84 so as to be formed in an arc shape that is convex forward in a side view as viewed from the left and right directions and that extends to below the injection cylinder portion 11. Yes. The elastic plate portion 54 is formed in a circular arc shape that is concentric with each other when viewed from the side in the left-right direction, and includes a pair of leaf springs arranged in the front-rear direction.

Of the pair of leaf springs, the leaf spring located on the front side is the main leaf spring 54a, and the leaf spring located on the rear side is the sub leaf spring 54b.
The lower ends of the main leaf spring 54a and the sub leaf spring 54b are integrally connected via an arcuate folded portion 54c. A locking piece 54d projects downward from the folded portion 54c, and the locking piece 54d is inserted into and engaged with a pocket portion 81a formed in the side plate member 81 of the trigger portion 51 from above. ing.
Thereby, the elastic board part 54 is urging | biasing the trigger part 51 toward the front via the locking piece 54d and the pocket part 81a.

  When the trigger portion 51 is pulled backward from the foremost swing position, the elastic plate portion 54 is elastically deformed so as to move the folded portion 54c backward via the locking piece 54d. At this time, in the elastic plate portion 54, the sub leaf spring 54b is elastically deformed larger than the main leaf spring 54a.

  Even when the trigger portion 51 is pulled rearward, the locking piece 54d is engaged with the pocket portion 81a until the trigger portion 51 reaches the rearmost swinging position while being pulled upward from the pocket portion 81a. Maintain a consistent state.

Furthermore, the ejector body 2 includes a closing member 20 that is mounted on the injection cylinder portion 11 from the front side. The closing member 20 is located on the front side of the front opening of the injection cylinder 11, and is opposed to the front opening and is opposed to the front opening, and extends backward from the counter plate 21. 1st cylinder part 22 externally fitted by the part 11, 2nd cylinder part (1st mounting part) 23 extended toward the front from the opposing board part 21, and it is located inside the 2nd cylinder part 23, and opposes it And a central protrusion 24 extending forward from the plate portion 21.
The central protrusion 24 is formed so as to fit inside the second cylinder part 23 without protruding forward from the second cylinder part 23.
Further, the lower end portion of the closing member 20 is in contact with the upper end portion of the main plate member 80 of the trigger portion 51 from the front, so that the trigger portion 51 is positioned at the foremost swing position.

  The second cylinder portion 23 and the central protrusion 24 are disposed at a position that is eccentric downward with respect to the central axis of the injection cylinder portion 11. An injection hole 25 that communicates with the front opening of the injection cylinder portion 11 is formed in a portion of the counter plate portion 21 that is located above the central protrusion 24 and that is located inside the second cylinder portion 23. Yes. Thereby, the inside of the second cylinder part 23 communicates with the inside of the injection cylinder part 11 through the injection hole 25.

The nozzle member 3 is mainly disposed in front of and above the ejector body 2.
The nozzle member 3 includes a nozzle body 152 in which the ejection holes 4 are formed, an auxiliary cylinder 90 extending in the front-rear direction, and a plunger 91 accommodated in the auxiliary cylinder 90.

The auxiliary cylinder 90 is disposed above the injection cylinder portion 11 and extends in the front-rear direction. Thereby, the auxiliary cylinder 90 is arranged in parallel to the injection cylinder part 11.
The auxiliary cylinder 90 includes a front wall portion 95 and a cylinder tube 96 extending rearward from the front wall portion 95, and is formed in a cylindrical shape opened rearward. The front wall portion 95 projects downward from the cylinder cylinder 96 and is formed longer in the vertical direction than in the left-right direction when the nozzle member 3 is viewed from the front side.

The cylinder cylinder 96 is disposed on the upper plate member 84 in the ejector body 2 and protrudes rearward from the vertical supply cylinder portion 10. A cap 197 is attached to the rear end portion of the cylinder cylinder 96.
The cap 197 protrudes from the rear end portion of the cap inner cylinder 197a toward the outside in the radial direction, and is engaged with the rear end edge of the cylinder cylinder 96 from the rear. A locking ring 197b to be stopped and a front wall portion 197c for closing the front opening of the cap inner cylinder 197a are provided. An air hole 197d is formed in the center of the front wall portion 197c so as to communicate the inside and the outside of the auxiliary cylinder 90 and allow the air in the auxiliary cylinder 90 to enter and exit.

The plunger 191 includes a rod 110 and an auxiliary piston 111 fitted to the front end portion of the rod 110, and is accommodated in the auxiliary cylinder 90 so as to be movable backward in a forward biased state.
The rod 110 is formed in a cylindrical shape opened rearward, and an enlarged diameter guide portion 110 a that protrudes toward the inner peripheral surface of the cylinder cylinder 96 is formed on the outer peripheral surface.
The auxiliary piston 111 is formed in a tapered shape that gradually increases in diameter from the central portion in the front-rear direction toward the front and rear, and both end portions in the front-rear direction are in slidable contact with the inner peripheral surface of the cylinder cylinder 96. A lip portion 111a is formed.

Between the plunger 91 and the cap 197, for example, a metal coil spring 112 is disposed in a state of extending in the front-rear direction and being compressed in the front-rear direction.
The coil spring 112 is disposed so as to surround the rod 110, and the rear end portion comes into contact with the cap inner cylinder 197 a of the cap 197 from the front, and the front end portion comes into contact with the enlarged diameter guide portion 110 a from the rear. Accordingly, the coil spring 112 biases the plunger 91 forward in the auxiliary cylinder 90.
The plunger 91 is located at the most advanced position with respect to the auxiliary cylinder 90, and the front end surface of the auxiliary piston 111 is in contact with the rear surface of the front wall portion 95. Not contained.

  The front wall portion 95 of the auxiliary cylinder 90 is formed in an elliptical shape that is long in the vertical direction when viewed from the front-rear direction, and covers the closing member 20 of the ejector body 2 from the front. The front wall portion 95 protrudes rearward and is attached to the second tube portion 23 of the ejector body 2 and attached to the second tube portion 231, and the axis of the third tube portion 231. A support shaft portion 182 that protrudes forward from a position displaced upward, and a mounting cylinder portion (fourth mounting portion) 235 that surrounds the support shaft portion 182 from the outside in the radial direction are formed.

The nozzle body 152 is mounted on the mounting cylinder portion 235 of the front wall portion 95. The nozzle body 152 is disposed in front of the front wall portion 95, and has a nozzle wall portion 170 in which the ejection holes 4 are formed, and extends rearward from the nozzle wall portion 170, and is externally attached to the mounting cylinder portion 235. And an external fitting cylinder part (third mounting part) 221 to be fitted. The nozzle body 152 and the auxiliary cylinder 90 are connected by attaching the outer fitting cylinder part 221 to the attachment cylinder part 235.
The external fitting cylinder part 221 is rotatably attached to the attachment cylinder part 235 in a state where it is prevented from coming off. That is, the nozzle body 152 is rotatable around the axis of the mounting cylinder portion 235.
The external fitting cylinder part 221 of the nozzle body 152 is formed to be attachable to the second cylinder part 23 of the ejector body 2. In the illustrated example, the outer fitting cylinder portion 221 of the nozzle body 152 is formed so as to be fitted on the second cylinder portion 23 of the ejector body 2.

A supported cylindrical portion 172 that is rotatably fitted to the support shaft portion 182 of the front wall portion 95 protrudes rearward from a portion of the nozzle wall portion 170 that is positioned inside the externally fitted cylindrical portion 221. Has been. A first concave groove 172 a extending along the front-rear direction is formed on the inner peripheral surface of the supported cylindrical portion 172.
On the front side of the nozzle body 152, a nozzle plate 175 for switching the liquid ejection form between mist and foam is attached so as to be openable and closable around a shaft portion 176 extending in the left-right direction. A turning circuit 12e is formed in a concave shape in a portion of the rear surface of the nozzle wall portion 170 located inside the supported cylindrical portion 172.

A second concave groove 182a capable of communicating the first concave groove 172a and the turning circuit 12e is formed at the front end portion of the outer peripheral surface of the support shaft portion 182. The first concave groove 172a and the second concave groove 182a communicate with each other at a predetermined rotational position of the nozzle body 152 around the support shaft portion 182 and are not communicated at other rotational positions.
In addition, between the supported cylinder part 172 and the external fitting cylinder part 221, a seal cylinder part 178 that is in close contact with the inside of the mounting cylinder part 235 is provided.

  A cylindrical passage space 183 is formed between the mounting cylinder 235 and the supported cylinder 172 of the nozzle body 152. The passage space 183 communicates with the ejection hole 4 through the first concave groove 172a, the second concave groove 182a, and the turning circuit 12e when the first concave groove 172a and the second concave groove 182a described above communicate with each other.

A portion of the front wall portion 95 located below the support shaft portion 182 is formed with a first communication hole 185 that allows the passage space 183 to communicate with the inside of the second cylinder portion 23 in the ejector body 2. Yes. Thereby, the inside of the injection cylinder part 11 and the ejection hole 4 are the injection hole 25, the inner side of the 2nd cylinder part 162, the 1st communicating hole 185, the passage space 183, the 1st ditch | groove 172a, the 2nd ditch | groove 182a, and It communicates through the turning circuit 12e.
In addition, each flow path cross-sectional area of the 1st communicating hole 185 and the passage space 183 is larger than the flow path cross-sectional area of the introduction path 186 which consists of the 1st ditch | groove 172a and the 2nd ditch | groove 182a.

Further, a supply hole 187 that connects the passage space 183 and the auxiliary cylinder 90 is formed in a portion of the front wall portion 95 positioned above the support shaft portion 182. Thereby, the inside of the auxiliary cylinder 90 and the ejection hole 4 communicate with each other through the supply hole 187, the passage space 183, the introduction path 186, and the turning circuit 12e.
Therefore, the passage space 183, the introduction path 186, and the turning circuit 12e function as a communication hole 190 that communicates the inside of the injection cylinder portion 11 and the auxiliary cylinder 90 with the ejection hole 4. The communication hole 190 opens toward the front end opening of the injection cylinder part 11 through the first communication hole 185, the second cylinder part 23 and the injection hole 25. The communication hole 190 is located on the front side of the supply hole 187 and opens toward the front end opening of the supply hole 187. In the communication hole 190, the flow passage cross-sectional area of the passage space 183 located at the rear end is larger than the flow passage cross-sectional area of the introduction passage 186 located on the front side on the ejection hole 4 side. .
The flow path cross-sectional area of the supply hole 187 is larger than the flow path cross-sectional area of the introduction path 186. The passage space 183 of the communication hole 190 is directly connected to the front ends of the first communication hole 185 and the supply hole 187. Further, the communication hole 190 and the front end opening of the injection cylinder portion 11 are opposed to each other in the front-rear direction.

(Operation of trigger type liquid ejector)
Next, a case where the trigger type liquid ejector 350 configured as described above is used will be described.
It is assumed that the liquid is filled in each part of the trigger type liquid ejector 350 by a plurality of operations of the trigger part 51 and the liquid can be sucked up from the vertical supply cylinder part 10.

  When the trigger portion 51 is pulled backward against the urging force of the elastic plate portion 54, the main piston 52 moves backward with the rearward movement of the trigger portion 51, so that the liquid in the main cylinder 53 is allowed to flow through the first through hole 66. And, it can be introduced into the inner cylinder 13 of the vertical supply cylinder portion 10 through the second through hole 67. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 to close it and pushes up the discharge valve 30 to open the valve, so that the liquid is introduced into the injection cylinder portion 11 through the inner discharge hole 17 and the outer discharge hole 16. Liquid can be introduced.

Thereby, since the internal pressure of the injection cylinder part 11 rises, the liquid in the injection cylinder part 11 is made to inject the injection hole 25, the inside of the second cylinder part 23, the first communication hole 185, the passage space 183, the introduction path 186 and the swivel. It can inject toward the front from the ejection hole 4 through the path 12e.
At this time, since the channel area of the supply hole 187 is larger than the channel area of the introduction path 186, the liquid introduced into the passage space 183 can be introduced into the auxiliary cylinder 90 through the supply hole 187. Accordingly, the plunger 91 can be moved backward from the most advanced position against the urging force of the coil spring 112.

  Therefore, every time the trigger portion 51 is pulled backward, the liquid can be ejected from the ejection hole 4, and the plunger 91 can be moved backward to accumulate the liquid in the auxiliary cylinder 90.

When the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the trigger portion 51 is urged forward by the elastic restoring force of the elastic plate portion 54 and returned to the original position. The main piston 52 moves forward. Therefore, a negative pressure is generated in the main cylinder 53, and the liquid in the container body A can be sucked into the vertical supply cylinder portion 10 through the pipe 15 by this negative pressure.
Then, the newly sucked liquid pushes up the suction valve 36 to open it, and is introduced into the main cylinder 53. Thereby, it can prepare for the next injection. The discharge valve 30 is closed.

At this time, the supply of the liquid from the injection cylinder portion 11 into the auxiliary cylinder 90 stops, but the plunger 91 starts to move forward toward the most advanced position by the elastic restoring force of the coil spring 112. Thereby, the liquid accumulated in the auxiliary cylinder 90 can be guided to the ejection hole 4 through the supply hole 187, the passage space 183, the introduction path 186, and the turning circuit 12e, and the liquid can be ejected forward through the ejection hole 4.
Thus, not only when the trigger part 51 is pulled backward, but also when the trigger part 51 is not operated, the liquid can be ejected, and the liquid can be continuously ejected.

In addition, when the operation of pulling the trigger portion 51 is not performed again when the plunger 91 moves forward, the plunger 91 moves to the most advanced position, but the operation of pulling the trigger portion 51 may be repeatedly performed before that.
In this case, the plunger 91 gradually moves backward as a whole while repeating the backward movement and the forward movement. Thereby, the liquid can be gradually stored in the auxiliary cylinder 90.

  Further, since the auxiliary cylinder 90 is disposed above the injection cylinder portion 11 and in parallel with the injection cylinder portion 11, the auxiliary cylinder 90 is arranged so as to be connected to the injection cylinder portion 11 in the front-rear direction. In comparison, it is easy to perform continuous injection for a long time by securing the stroke of the plunger 91 while shortening the overall length of the trigger type liquid ejector 1 to reduce the size.

  Moreover, since the external fitting cylinder part 221 of the nozzle body 152 is formed to be attachable to the second cylinder part 23 of the ejector body 2, the nozzle member 3 includes the auxiliary cylinder 90, the plunger 91, and the third cylinder part 231. And the mounting cylinder part 235 and the like, but only the nozzle body 152, and the external fitting cylinder part 221 of the nozzle body 152 is attached to the second cylinder part 23 of the ejector body 2 The trigger type liquid ejector can be used as it is without changing the design.

  Further, since the communication hole 190 opens toward the front end opening of the injection cylinder part 11, when the trigger part 51 is pulled backward, a part of the liquid from the injection cylinder part 11 is supplied to the supply hole 187. In addition, it is possible to directly reach the ejection hole 4 through the communication hole 190 without passing through the auxiliary cylinder 90, and liquid can be stably ejected even before the liquid is accumulated in the auxiliary cylinder 90. it can.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, a trigger type liquid ejector in which the operation member 130 of the first embodiment and the recovery passageway 213 of the third embodiment are used together may be used.
Further, in contrast to the first embodiment and the second embodiment, an ejector body 2 similar to the third embodiment and the fourth embodiment is disposed at the front end portion of the injection cylinder portion 11. The nozzle body 3 includes two cylindrical portions (first mounting portions) 23, and the nozzle member 3 includes a third cylindrical portion (second mounting portion) 231 mounted on the second cylindrical portion 23 and a nozzle body 220 in which the ejection holes 4 are formed. , 152 and the mounting cylinder portion (fourth mounting portion) in which the nozzle bodies 220, 152 and the auxiliary cylinder 90 are connected by mounting the external fitting cylindrical portion (third mounting portion) 221 provided in the nozzle bodies 220, 152. (Mounting part) 235, and a configuration in which the outer fitting cylinder part 221 of the nozzle bodies 220 and 152 is formed to be attachable to the second cylinder part 23 of the ejector body 2 may be applied.
In the third embodiment, the nozzle body 152 according to the fourth embodiment may be employed instead of the nozzle body 220.
In the first embodiment and the second embodiment, the nozzle bodies 220 and 152 of the third embodiment and the fourth embodiment may be applied.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 1,150,250,350 ... Trigger type liquid ejector 2 ... Ejector main body 3 ... Nozzle member 4 ... Ejection hole 10 ... Vertical supply cylinder part 11 ... Injection cylinder part 23 ... 2nd cylinder part (1st mounting part)
DESCRIPTION OF SYMBOLS 50 ... Trigger mechanism 51 ... Trigger part 90 ... Auxiliary cylinder 91, 191 ... Plunger 95a, 129, 187, 198 ... Supply hole 104, 190, 237 ... Communication hole 110b ... Locked part 130 ... Actuating member 133 ... Restriction part 137 ... Annular wall (locking part)
152, 220 ... Nozzle body 213 ... Recovery passage 221 ... Outer fitting cylinder (third mounting part)
231 ... 3rd cylinder part (2nd mounting part)
235 ... Installation cylinder (fourth installation)

Claims (6)

An ejector body mounted on a container body containing a liquid;
A nozzle member that is disposed on the front side of the ejector body and has an ejection hole that ejects liquid toward the front; and
The ejector body is
A vertical supply cylinder that extends in the vertical direction and sucks up the liquid in the container body;
An injection cylinder part extending forward from the vertical supply cylinder part, the inside communicating with the inside of the vertical supply cylinder part;
It has a trigger portion that extends downward from the injection tube portion and is swingable rearward in a forward-biased state, and the vertical movement of the trigger portion causes the liquid to flow vertically. A trigger mechanism for introducing from the inside of the supply cylinder part into the injection cylinder part and for injecting from the inside of the injection cylinder part toward the ejection hole side,
The trigger mechanism is
A main piston that moves in the front-rear direction in conjunction with the swing of the trigger portion;
A main cylinder whose inside is pressurized and depressurized as the main piston moves, and whose inside communicates with the vertical supply cylinder part;
A discharge valve that is disposed in the vertical supply cylinder, and switches between communication between the injection cylinder and the main cylinder and switching off the communication;
A suction valve that is disposed in the vertical supply cylinder and switches between communication between the container and the main cylinder, and switching between the suction valve and the suction valve;
In the nozzle member,
An auxiliary cylinder that extends in the front-rear direction and communicates with the inside of the injection cylinder through the supply hole;
A plunger housed in the auxiliary cylinder so as to be movable backward in a forward biased state, and
A trigger type liquid ejector characterized in that a communication hole is formed to communicate the inside of the auxiliary cylinder and the ejection hole. The communication hole is formed in a front wall portion of the auxiliary cylinder,
The trigger type liquid ejector according to claim 1, wherein the plunger closes the communication hole so as to be freely opened.   The trigger type liquid ejector according to claim 1, wherein the communication hole is opened toward a front end opening of the injection tube portion. The nozzle member is provided with an operating member arranged to be movable backward with respect to the auxiliary cylinder,
The actuating member is
A locking portion that is arranged rearward of the locked portion formed on the plunger and that the locked portion locks from the front when the plunger moves backward,
And a restricting portion that restricts swinging of the trigger portion by approaching or contacting the trigger portion when the operating member moves backward relative to the auxiliary cylinder. Item 4. The trigger type liquid ejector according to any one of Items 1 to 3.   5. The recovery passage communicating with the inside of the container body is opened at a portion of the auxiliary cylinder that is spaced rearward from the front wall portion of the auxiliary cylinder. 6. Triggered liquid ejector as described. The ejector body includes a first mounting portion disposed at a front end portion of the injection cylinder portion,
The nozzle member includes the second mounting portion mounted on the first mounting portion, the nozzle body on which the ejection holes are formed, and the third mounting portion provided on the nozzle body. A fourth mounting portion to which the body and the auxiliary cylinder are coupled,
The trigger type liquid ejector according to any one of claims 1 to 5, wherein the third mounting portion of the nozzle body is formed so as to be mountable on the first mounting portion of the ejector body. .

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