JP6491992B2 - Trigger type liquid ejector - Google Patents

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, the present invention proposes the following means.
The trigger type liquid ejector according to the present invention includes an ejector body mounted on a container body in which a liquid is accommodated, and an ejection hole that is disposed on the front side of the ejector body and ejects the liquid forward. A nozzle member, and the ejector body extends vertically and extends vertically from the vertical supply cylinder, the vertical supply cylinder that sucks up the liquid in the container body, An injection cylinder part whose inner side communicates with the inside of the vertical supply cylinder part, and a trigger part that extends downward from the injection cylinder part and is movably disposed rearward in a forward biased state, A trigger type liquid comprising: a trigger mechanism that causes the liquid to be introduced from the vertical supply cylinder part into the injection cylinder part by being moved rearward of the trigger part, and to be ejected from the injection cylinder part toward the ejection hole side. An ejector after the trigger And a storage cylinder in which the liquid that has passed through the vertical supply cylinder is supplied to the inside, and the storage cylinder is disposed in the storage cylinder so as to be movable in the axial direction along the central axis thereof. A storage plunger that moves toward one side of the axial direction in accordance with the supply of liquid, a negative pressure plunger that is connected to the storage plunger and is linked to the movement of the storage plunger in the axial direction, and the axial direction A negative pressure cylinder that extends along the other end and that is disconnected from the other end opening in the axial direction and that communicates with the outside, and in which the negative pressure plunger is movably accommodated toward one side in the axial direction. Features.

According to the present invention, when the trigger part is pulled backward in a state where the liquid container is mounted on the container body, the liquid in the container body is sucked up and introduced into the vertical supply cylinder part and passed through the vertical supply cylinder part. While the liquid is ejected from the ejection hole through the inside of the ejection cylinder portion, it is also introduced into the storage cylinder. As the liquid is introduced into the storage cylinder, the storage plunger in the storage cylinder moves toward one side in the axial direction together with the negative pressure plunger in the negative pressure cylinder. At this time, in the negative pressure cylinder, the sealed space located on the other side in the axial direction from the negative pressure plunger becomes negative pressure. Thereby, the urging | biasing force toward the other side of the said axial direction acts with respect to a negative pressure plunger and a storage plunger.
In this way, each time the operation of pulling the trigger portion is performed, the storage plunger can be moved to one side in the axial direction while the liquid is ejected from the ejection hole, and the liquid can be stored (filled) in the storage cylinder. .
When the operation of pulling the trigger portion is stopped, the supply of liquid into the vertical supply cylinder portion is stopped, but the negative pressure plunger and the storage plunger are integrally moved to the other side in the axial direction by the negative pressure in the negative pressure cylinder. Start to move towards restoration. Thereby, the liquid filled in the storage cylinder can be continuously ejected from the ejection hole by being pushed out from the storage cylinder toward the ejection hole side. 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 storage plunger is restored and moved toward the other side in the axial direction, if the trigger portion is not pulled again, the storage plunger moves to the other end in the axial direction of the storage cylinder, but the trigger portion is pulled before that. You can repeat the operation. In this case, the storage plunger repeats the movement toward the one side in the axial direction and the movement toward the other side with a substantially constant width, and as a whole, gradually moves toward the one side in the axial direction. Thereby, the liquid gradually accumulates in the storage cylinder.
By the way, when the negative pressure plunger and the storage plunger are restored and moved, the negative pressure in the negative pressure cylinder is used. For example, even if the biasing force acting from another member such as a biasing member is not used, the negative pressure The plunger and the storage plunger can be restored. Thereby, thrust can be given to a negative pressure plunger and a storage plunger, aiming at simplification of a structure. As a general urging member, use of, for example, a metal spring is conceivable, but by not using this type of urging member, it is possible to form this trigger type liquid ejector only with a synthetic resin material. become.

  The pressure receiving area of the negative pressure plunger may be larger than the pressure receiving area of the storage plunger.

  In this case, since the pressure receiving area of the negative pressure plunger is larger than the pressure receiving area of the storage plunger, when the negative pressure plunger and the storage plunger are integrally restored and moved by the negative pressure in the negative pressure cylinder, the pressure receiving area of the negative pressure plunger Accordingly, a large thrust can be applied to the negative pressure plunger and the storage plunger. Thereby, the negative pressure plunger and the storage plunger can be smoothly restored and moved.

  The storage cylinder and the negative pressure cylinder are integrally formed, and the storage cylinder is formed in a double cylinder disposed inside the negative pressure cylinder, and the storage plunger and the negative pressure plunger are: While being formed integrally, the storage plunger may be formed in a double cylinder shape disposed inside the negative pressure plunger.

  In this case, since the storage cylinder and the negative pressure cylinder are integrally formed, and the storage plunger and the negative pressure plunger are integrally formed, the structure can be simplified.

  A restricting portion is disposed on one side in the axial direction from a locked portion formed on at least one of the storage plunger and the negative pressure plunger, and the restricting portion includes the storage plunger and the storage plunger. When the negative pressure plunger moves toward one side in the axial direction, the locked portion abuts from the other side in the axial direction, and further toward the one side in the axial direction beyond these plungers. The movement may be restricted.

  In this case, when the storage plunger and the negative pressure plunger move toward one side in the axial direction, the further movement of both plungers is restricted by the contact between the locked portion and the restriction portion, and both plungers Therefore, it is possible to prevent the storage cylinder from being filled with an excessive amount of liquid. Thereby, it can prevent that the pressure in a storage cylinder rises excessively, and it can prevent that malfunctions, such as breakage, arise. For this reason, it is easy to use, and the continuous ejection of liquid can be performed with peace of mind.

  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 an expanded vertical sectional view of the principal part containing the ejector main body which comprises the trigger type liquid ejector shown in FIG. FIG. 2 is an enlarged longitudinal sectional view of a main part including a nozzle member constituting the trigger type liquid ejector shown in FIG. 1. In the trigger type liquid ejector shown in FIG. 1, it is a longitudinal cross-sectional view which shows the state which pulled the trigger part back and moved the storage plunger and the negative pressure plunger back. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the trigger type liquid ejector which concerns on this invention. FIG. 6 is an enlarged longitudinal sectional view of a main part including a nozzle member constituting the trigger type liquid ejector shown in FIG. 5. FIG. 6 is an enlarged longitudinal sectional view of a main part including a storage cylinder, a storage plunger, a negative pressure plunger, and a negative pressure cylinder constituting the trigger type liquid ejector shown in FIG. 5. In the trigger type liquid ejector shown in FIG. 5, it is a longitudinal cross-sectional view which shows the state which pulled the trigger part back and moved the storage plunger and the negative pressure plunger back. It is a longitudinal cross-sectional view of the principal part which shows the modification of the trigger type liquid ejector which concerns on this invention. (A) has shown the state which inserts a storage plunger and a negative pressure plunger in a storage cylinder and a negative pressure cylinder, and mounts a plug member on a storage plunger using an insertion jig. (B) has shown the state which moves an insertion jig | tool back after the obstruction | occlusion wall of a storage plunger reaches | attains the front wall part of a storage cylinder. (C) has shown the state which the modification of the trigger type | mold liquid ejector which concerns on this invention was completed.

(First embodiment)
Hereinafter, a first embodiment of a trigger type liquid ejector according to the present invention will be described with reference to FIGS. 1 to 4.
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.

As shown in FIG. 2, the ejector body 2 includes the vertical supply cylinder portion 10 extending in the vertical direction, and extends from the vertical supply cylinder portion 10 along the front-rear direction. And an injection cylinder portion 11 communicating with the inside, 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 storage cylinder 90 and negative pressure cylinder 94, which will be described later, at least from above and in the left-right direction.

  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 in the foremost swing position (the foremost movement 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 and 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 if the trigger piece 51 is pulled rearward, the locking piece 54d is pulled upward from the pocket portion 81a until the trigger portion 51 reaches the rearmost swing position (the rearmost movement position). The engaged state with the pocket portion 81a is maintained.

  As shown in FIG. 3, the trigger type liquid ejector 1 includes a storage cylinder 90 in which the liquid that has passed through the vertical supply cylinder portion 10 is supplied to the inside by the swing of the trigger portion 51 to the rear, and a storage cylinder. 90 is movably disposed in the front-rear direction (axial direction) along the central axis O <b> 2, and moves toward the rear side (one side) in the front-rear direction as the liquid is supplied into the storage cylinder 90. A storage plunger 91, a negative pressure plunger 93 connected to the storage plunger 91 and linked to the movement of the storage plunger 91 in the front-rear direction, and extending in the front-rear direction, and the front end opening (the other end opening) and external communication are blocked. And a negative pressure cylinder 94 in which a negative pressure plunger 93 is movably accommodated toward the rear side, and is formed in at least one of a storage plunger 91 and a negative pressure plunger 93. And a regulating portion 98 which is spaced apart rearward from the locked portion 97, and further comprising a. In the present embodiment, the storage cylinder 90, the storage plunger 91, the negative pressure plunger 93, the negative pressure cylinder 94, and the restriction portion 98 are all provided in the nozzle member 3.

  The nozzle member 3 is mainly disposed in front of and above the ejector body 2. The nozzle member 3 includes the storage cylinder 90, the storage plunger 91, the negative pressure plunger 93, the negative pressure cylinder 94, the restriction portion 98, and the mounting cylinder 92 that is attached to the injection cylinder portion 11.

  The storage cylinder 90 and the negative pressure cylinder 94 are integrally formed, and the storage cylinder 90 is formed in a double cylinder shape disposed inside the negative pressure cylinder 94. Both the storage cylinder 90 and the negative pressure cylinder 94 are disposed above the injection cylinder 11 and extend in the front-rear direction. The storage cylinder 90 and the negative pressure cylinder 94 are disposed in parallel to the injection cylinder portion 11.

  The storage 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 storage cylinder 90 is disposed so as to be spaced upward from the upper plate member 84 in the ejector body 2, and is located in front of the vertical supply cylinder portion 10.

  A columnar nozzle shaft portion 100, a surrounding tube 101 that surrounds the nozzle shaft portion 100 from the outside, and an outer tube 321 that surrounds the surrounding tube 101 from the outside protrude from the front wall portion 95 toward the front. Yes. The nozzle shaft portion 100, the surrounding cylinder 101 and the outer cylinder 321 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 storage 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 storage cylinder 90 and the ejection hole 4 through the flow passage 102.

  A supply hole 95 a communicating with the inside of the storage cylinder 90 and a flow path 126 described later is formed at the front end portion 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 supply hole 95a indirectly communicates the inside of the vertical supply cylinder part 10 and the storage cylinder 90 through the injection cylinder part 11.

  The negative pressure cylinder 94 is disposed coaxially with the storage cylinder 90. The negative pressure cylinder 94 is connected to the storage cylinder 90 via a closing flange 99 protruding from the outer peripheral surface of the cylinder cylinder 96. The closing flange 99 is formed coaxially with the central axis O <b> 2 and closes the front end opening of the negative pressure cylinder 94. The closing flange 99 is formed with an exhaust hole 99a penetrating the closing flange 99 in the front-rear direction. The negative pressure cylinder 94 extends rearward from the outer peripheral edge of the closing flange 99. The rear end portion of the negative pressure cylinder 94 is located behind the vertical supply cylinder portion 10. The rear end portion of the negative pressure cylinder 94 may be located at a position equivalent to the longitudinal supply cylinder portion 10 in the front-rear direction or forward of the longitudinal supply cylinder portion 10. In these cases, the trigger type liquid ejector 1 can be easily made compact in the front-rear direction.

The storage plunger 91 and the negative pressure plunger 93 are integrally formed, and the storage plunger 91 is formed in a double cylinder shape disposed inside the negative pressure plunger 93. The storage plunger 91 and the negative pressure plunger 93 are arranged coaxially with the central axis O2.
The storage plunger 91 includes a plunger cylinder 110 extending in the front-rear direction and a closing wall 111 that closes the front end opening of the plunger cylinder 110.

The plunger cylinder 110 is formed in a two-stage cylinder whose diameter decreases stepwise from the rear to the front. An annular first lip portion 110a disposed coaxially with the central axis O2 is projected from the step portion of the plunger cylinder 110 toward the front. The first lip portion 110 a is in close sliding contact with the inner peripheral surface of the cylinder cylinder 96.
The blocking wall 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 storage cylinder 90 to directly block the communication hole 104. Thus, the storage plunger 91 closes the communication hole 104 so as to be freely opened.

  The negative pressure plunger 93 is disposed between the outer peripheral surface of the storage cylinder 90 and the inner peripheral surface of the negative pressure cylinder 94. A connecting ring portion 114 that protrudes inward in the radial direction is provided at the rear end portion of the negative pressure plunger 93. The connecting ring portion 114 is connected to the rear end portion of the plunger cylinder 110. At the front end portion of the negative pressure plunger 93, an annular protrusion 112 protruding outward in the radial direction is provided. An annular second lip portion 112a disposed coaxially with the central axis O2 is provided on the protrusion portion 112 so as to protrude rearward. The second lip portion 112 a is in slidable contact with the inner peripheral surface of the negative pressure cylinder 94.

  The pressure receiving area of the negative pressure plunger 93 is larger than the pressure receiving area of the storage plunger 91. In this embodiment, when the negative pressure plunger 93 and the storage plunger 91 are projected onto a projection plane orthogonal to the central axis O2, the shadow area of the negative pressure plunger 93 that appears in an annular shape coaxial with the central axis O2 on the projection plane. The projected area of the negative pressure plunger 93 is larger than the shadow area of the storage plunger 91 that appears on the central axis O2 on the projection plane (projected area of the storage plunger 91). The projected area of the negative pressure plunger 93 is such that, on the projection plane, the minimum inner diameter portion (in the illustrated example, the connecting ring portion 114) and the maximum outer diameter portion (in the illustrated example, the second lip portion 112a) of the negative pressure plunger 93. It is the area of the part located between. The projected area of the storage plunger 91 is the area of the portion located on the inner side of the maximum outer diameter portion (in the illustrated example, the first lip portion 110a) of the storage plunger 91 on the projection plane.

  The restricting portion 98 is formed in a cylindrical shape that is disposed coaxially with the central axis O <b> 2 and extends in the front-rear direction, and is inserted into the negative pressure cylinder 94. The restricting portion 98 has a larger diameter than the negative pressure plunger 93, and the front end portion of the restricting portion 98 is extrapolated to the rear end portion of the negative pressure plunger 93. The front end portion of the restricting portion 98 faces the protruding portion 112 from the rear side. A fitting cylinder portion 115 into which the rear end portion of the negative pressure cylinder 94 is fitted is connected to the rear end portion of the restriction portion 98. The fitting cylinder part 115 is formed in a double cylinder shape that is smaller than the restriction part 98 in the front-rear direction and larger in diameter than the restriction part 98, and between the inner cylinder and the outer cylinder of the fitting cylinder part 115, The rear end portion of the negative pressure cylinder 94 is fitted.

  As shown in FIG. 4, when the storage plunger 91 and the negative pressure plunger 93 are moved toward the rear side (one side in the axial direction), the restricted portion 97 is moved to the front side (the other in the axial direction). Side) and restricts further movement of these plungers 91 and 93 toward the rear side. In the illustrated example, the front end portion of the restricting portion 98 can be brought into contact with the protruding portion 112, and the protruding portion 112 constitutes the locked portion 97.

  Note that the position of the storage plunger 91 and the negative pressure plunger 93 when the convex portion 113 closes the communication hole 104 as shown in FIG. When the storage plunger 91 and the negative pressure plunger 93 are disposed at the most advanced position, the liquid is hardly contained in the storage cylinder 90 and the communication between the storage cylinder 90 and the communication hole 104 is blocked. Yes.

  On the other hand, as shown in FIG. 4, the storage plunger 91 and the negative pressure plunger 91 when the locked portion 97 is in contact with the restriction portion 98 from the front by the rearward movement of the storage plunger 91 and the negative pressure plunger 93. The position of the pressure plunger 93 is the last retracted position. When the storage plunger 91 has reached the last retracted position, the maximum amount of liquid is stored in the storage cylinder 90.

  Here, the mounting cylinder 92 is integrally formed at the front end of the storage cylinder 90 (cylinder cylinder 96) via an intermediate cylinder 122 extending downward from the front end. The mounting cylinder 92 protrudes rearward from the intermediate cylinder 122 and 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 inside of the intermediate cylinder 122 communicates with the inside of the storage cylinder 90 through the supply hole 95a. The intermediate cylinder 122 is integrally formed with the closing flange 99, and the inside of the intermediate cylinder 122 can communicate with the inside of the negative pressure cylinder 94 through the exhaust hole 99a. The intermediate cylinder 122 is formed with a passage hole 122 a that passes through the intermediate cylinder 122 and communicates with the mounting cylinder 92. The inside of the intermediate cylinder 122 communicates with the inside of the injection cylinder portion 11 through the passage hole 122a.

  A plug 125 is inserted into the intermediate cylinder 122 over almost the entire length in the vertical direction. The plug 125 has a passage hole 122a between the inner peripheral surface of the intermediate cylinder 122 in a state where the supply hole 95a and the passage hole 122a are opened and the lower end opening of the intermediate cylinder 122 and the exhaust hole 99a are closed tightly. And a flow path 126 that communicates with the supply hole 95a. Due to the plug 125, the spatial volume of the flow path 126 is reduced.

An insertion portion 201 is formed at a connection portion between the intermediate tube 122 and the mounting tube 92 and extends rearward and is inserted over substantially the entire length in the front-rear direction in the injection tube portion 11. 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 be made small.
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 passage hole 122a, the flow path 126, the supply hole 95a, the inside of the storage cylinder 90, the communication hole 104, and the flow passage 102. Therefore, the communication hole 104 communicates the inside of the storage cylinder 90 and the ejection hole 4 as described above, but in addition, the interior of the injection cylinder portion 11 and the ejection hole 4 are also communicated. .

  The trigger-type liquid ejector 1 as shown in FIGS. 1 to 4 extends in the front-rear direction, and the inside of the trigger-type liquid ejector 1 with the injection cylinder part 11 in the injection cylinder part 11 or the vertical supply cylinder part 10 through the supply hole 95a. A storage cylinder 90 communicating with a connecting portion (portion positioned above the valve body 33 and the suction valve 36), a storage plunger 91 accommodated in the storage cylinder 90 so as to be movable rearwardly, and a storage plunger 91, A negative pressure plunger 93 linked to the back and forth movement of the storage plunger 91; a negative pressure cylinder 94 extending in the front and rear direction, the front end opening being disconnected from the outside, and the negative pressure plunger 93 being accommodated in the rear movably; It can be said that it is equipped with.

  Further, the trigger type liquid ejector 1 includes a storage cylinder 90 whose inside communicates with the nozzle member 3 through the supply hole 95a in the injection cylinder portion 11, and a longitudinal direction (axial direction) along the central axis O2 in the storage cylinder 90. ) And is connected to the storage plunger 91, and moves to the rear side (one side) of the front-rear direction as the liquid is supplied into the storage cylinder 90. The negative pressure plunger 93 linked to the longitudinal movement of 91 and the front end opening (the other end opening) and the external communication are blocked while extending along the front and rear direction, and the negative pressure plunger 93 moves toward the rear side inside And a negative pressure cylinder 94 that is freely accommodated, and a communication hole 104 that communicates the inside of the storage cylinder 90 and the ejection hole 4 is formed. It is said to be located in front of the front end opening parts 11.

(Manufacturing method of trigger type liquid ejector)
When the trigger type liquid ejector 1 is manufactured, the storage plunger 91 and the negative pressure plunger 93 are inserted into the storage cylinder 90 and the negative pressure cylinder 94, respectively, and the front ends of both cylinders 90, 94 (in the axial direction) By reaching the other end), the storage plunger 91 and the negative pressure plunger 93 and the storage cylinder 90 and the negative pressure cylinder 94 can be assembled. For example, after that, by vacuuming the inside of the negative pressure cylinder 94 using the exhaust hole 99a, the residual air is discharged from the minute gap remaining between the negative pressure cylinder 94 and the negative pressure plunger 93. The negative pressure cylinder 94 can be in a negative pressure state (a reduced pressure state).

(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.

  Thereby, since the internal pressure of the injection cylinder part 11 rises, the liquid in the injection cylinder part 11 can be introduced into the intermediate cylinder 122 and further introduced into the storage cylinder 90 through the flow path 126 and the supply hole 95a. . Then, the storage plunger 91 can be moved rearward from the most advanced position, and the communication hole 104 can be opened by separating the projection 113 from the communication hole 104.

  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 storage 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 storage plunger 91 is moved backward to accumulate the liquid in the storage cylinder 90 (filling). can do. With the introduction of the liquid into the storage cylinder 90, the storage plunger 91 in the storage cylinder 90 moves to the rear side (one side in the axial direction) together with the negative pressure plunger 93 in the negative pressure cylinder 94. At this time, in the negative pressure cylinder 94, the sealed space S located on the front side (the other side in the axial direction) of the negative pressure plunger 93 becomes negative pressure. Thereby, the urging | biasing force toward the front side acts with respect to the negative pressure plunger 93 and the storage plunger 91. FIG.

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 storage cylinder 90 is stopped, but the negative pressure plunger 93 and the storage plunger 91 are integrally moved forward toward the most advanced position by the negative pressure in the negative pressure cylinder 94. It starts to move (restoration movement toward the other side in the axial direction). Thereby, the liquid accumulated in the storage 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, since the storage cylinder 90 is disposed above the injection cylinder portion 11 and in parallel with the injection cylinder portion 11, the storage cylinder 90 is disposed so as to be connected to the injection cylinder portion 11 in the front-rear direction. In comparison, while shortening the overall length of the trigger type liquid ejector 1 and reducing the size, the stroke of the storage plunger 91 is secured and it is easy to perform continuous injection for a long time.

  Further, the storage cylinder 90 is formed with 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, and the storage plunger 91 directly blocks the communication hole 104. Therefore, the spatial volume of the path from the injection cylinder 11 to the storage cylinder 90 (the internal volume occupied by the path) can be easily reduced with little restriction. Therefore, when the trigger part 51 is operated, the liquid can be immediately introduced from the injection cylinder part 11 into the storage cylinder 90, the pressure in the storage cylinder 90 is quickly raised, and the storage plunger 91 is immediately moved backward. Easy to do. 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.

  In addition, since the space in the injection cylinder 11 and the intermediate cylinder 122 is further reduced by the insertion part 201 and the plug 125, the pressure in the storage cylinder 90 can be increased more quickly. Therefore, the liquid can be ejected at a high ejection pressure, and the storage plunger 91 can be moved backward more smoothly.

Further, since the storage plunger 91 directly closes the communication hole 104, the liquid is not ejected unless the internal pressure of the storage 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, pressure can be accumulated by moving the storage plunger 91 urged forward by the negative pressure in the negative pressure cylinder 94 backward, so that when the liquid is ejected, it can be ejected in a state where pressure is further applied to the liquid. .
Further, it is possible to effectively suppress liquid leakage from the ejection holes 4 when not in use.

When the storage plunger 91 advances, the storage plunger 91 moves to the most advanced position (the other end in the axial direction of the storage cylinder 90) unless the operation of pulling the trigger portion 51 again is performed. You may repeat the operation of pulling.
In this case, the storage 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 storage cylinder 90. Then, by moving the storage plunger 91 to the last retracted position, for example, the liquid can be continuously ejected over a long period of time until the storage plunger 91 moves from the last retracted position to the most advanced position. When the storage plunger 91 and the negative pressure plunger 93 move to the last retracted position, the locked portion 97 comes into contact with the restricting portion 98, and further rearward movement of the plungers 91 and 93 is restricted.

  As described above, according to the trigger type liquid ejector 1 according to the present embodiment, when the negative pressure plunger 93 and the storage plunger 91 are restored and moved, the negative pressure in the negative pressure cylinder 94 is used. The negative pressure plunger 93 and the storage plunger 91 can be restored and moved without using an urging force acting from another member such as an urging member. Thereby, it is possible to apply thrust to the negative pressure plunger 93 and the storage plunger 91 while simplifying the structure. In addition, utilization of a metal spring etc. can be considered as a general urging member, however, by not using this type of urging member, the trigger type liquid ejector 1 may be formed only by a synthetic resin material. It becomes possible.

  Further, since the pressure receiving area of the negative pressure plunger 93 is larger than the pressure receiving area of the storage plunger 91, the negative pressure plunger 93 and the storage plunger 91 are moved together by the negative pressure due to the negative pressure in the negative pressure cylinder 94. A large thrust can be applied to the negative pressure plunger 93 and the storage plunger 91 according to the pressure receiving area of the plunger 93. Thereby, the negative pressure plunger 93 and the storage plunger 91 can be smoothly restored and moved.

  Further, when the storage plunger 91 and the negative pressure plunger 93 move toward the rear side, the further movement of the plungers 91 and 93 is restricted by the contact of the locked portion 97 and the restriction portion 98, By restricting excessive movement of the plungers 91 and 93, it is possible to prevent the storage cylinder 90 from being filled with an excessive amount of liquid. Thereby, it can prevent that the pressure in the storage cylinder 90 rises excessively, 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 addition, since the storage cylinder 90 and the negative pressure cylinder 94 are integrally formed, and the storage plunger 91 and the negative pressure plunger 93 are integrally formed, the structure can be simplified.

(Second Embodiment)
Next, a trigger type liquid ejector 350 according to a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described.

  As shown in FIG. 5 and FIG. 6, in the trigger type liquid ejector 350 according to the present embodiment, the ejector body 2 includes a closing member 20 that is attached to the injection cylinder portion 11 from the front side. The lower end portion of the closing member 20 contacts the upper end portion of the main plate member 80 of the trigger portion 51 from the front, thereby positioning the trigger portion 51 at the foremost swing position.

  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. A first tube portion 22 fitted on the portion 11, a second tube portion 23 extending forward from the counter plate portion 21, and an inner side of the second tube portion 23, and forward of the counter plate portion 21. And a support shaft portion 182 extending toward the surface.

  The support shaft part 182 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 support shaft portion 182 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 communicating with the front opening of the injection cylinder portion 11 is formed in a portion of the counter plate portion 21 located above the support shaft portion 182 and positioned 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 disposed in front of the ejector body 2. The nozzle member 3 is attached to the second cylindrical portion 23 of the ejector body 2. The nozzle member 3 is disposed in front of the opposing plate portion 21 of the closing member 20, 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 connected to the second tube portion 23. In contrast, an external fitting cylinder portion 221 that is externally fitted from the front is provided. The nozzle member 3 and the ejector body 2 are connected by attaching the outer fitting cylinder part 221 to the second cylinder part 23.
The external fitting cylinder part 221 is rotatably attached to the second cylinder part 23 in a state where it is prevented from coming off. That is, the nozzle member 3 is rotatable around the axis of the second cylinder portion 23.

A supported cylindrical portion 172 that is externally fitted to the support shaft portion 182 so as to be rotatable with respect to the support shaft portion 182 projects from the nozzle wall portion 170 on the inner side of the externally fitted cylindrical portion 221. 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 member 3, 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 around the support shaft portion 182 of the nozzle member 3, 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 second cylinder part 23 is provided.

Between the 2nd cylinder part 23 and the to-be-supported cylinder part 172 of the nozzle member 3, the cylindrical passage space 183 which the injection hole 25 communicates from back is formed. 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. Thereby, the inside of the injection cylinder portion 11 and the ejection hole 4 communicate with each other through the injection hole 25, the passage space 183, the first concave groove 172a, the second concave groove 182a, and the turning circuit 12e.
In addition, each flow-path cross-sectional area of the injection hole 25 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.

As shown in FIGS. 5 and 7, the storage cylinder 90, the storage plunger 91, the negative pressure plunger 93, and the negative pressure cylinder 94 are all provided in the nozzle member 3, but independent of the nozzle member 3. Is provided. The storage cylinder 90, the storage plunger 91, the negative pressure plunger 93, and the negative pressure cylinder 94 are disposed on the opposite side of the nozzle member 3 with the ejector body 2 sandwiched in the front-rear direction, and are disposed on the rear side of the ejector body 2. Has been. The storage cylinder 90 extends rearward from the outer cylinder 12, and the front wall portion 95 is formed integrally with the outer cylinder 12. The rear end portion of the negative pressure cylinder 94 is disposed at a position equivalent to the rear end portion of the storage cylinder 90 in the front-rear direction. The storage cylinder 90, the storage plunger 91, the negative pressure plunger 93, and the negative pressure cylinder 94 are accommodated in the cover body 55.
The locked portion 97 is formed on the outer peripheral surface of the negative pressure plunger 93 in the form of a vertical rib extending in the front-rear direction. The front end of the locked portion 97 is connected to the protrusion 112, and the rear end of the locked portion 97 faces the cover body 55 from the front side.

  The central axis O2 of the storage cylinder 90 is located above the valve body 33. The outer cylinder 12 (front wall portion 95) and the inner cylinder 13 are formed with the supply hole 95a. The supply hole 95a is disposed on the central axis O2, and communicates the inside of the vertical supply cylinder portion 10 and the storage cylinder 90. The supply hole 95 a includes an outer supply hole 351 formed in the outer cylinder 12 and an inner supply hole 352 formed in the inner cylinder 13. The outer supply hole 351 is directly blocked by the convex portion 113. The inner supply hole 352 opens into a space above the valve body 33 in the vertical supply cylinder portion 10. The supply hole 95a does not pass through the injection cylinder part 11, but directly communicates the inside of the vertical supply cylinder part 10 and the storage cylinder 90.

  An exposure hole 353 that penetrates the cover body 55 in the front-rear direction is formed at the rear end portion of the cover body 55. The exposure hole 353 is disposed coaxially with the central axis O2, has a larger diameter than the negative pressure plunger 93, and a smaller diameter than the second lip portion 112a. An opening peripheral edge portion 353 a of the exposure hole 353 in the cover body 55 is disposed away from the locked portion 97 to the rear side. As shown in FIG. 8, in the present embodiment, the opening peripheral edge portion 353 a serves as the restricting portion 98. When the storage plunger 91 and the negative pressure plunger 93 move toward the rear side (one side in the axial direction), the locked portion 97 abuts from the front side (the other side in the axial direction). Further, the movement of both the plungers 91 and 93 toward the rear side is restricted.

  In the trigger type liquid ejector 350 as shown in FIGS. 5 to 8, a storage cylinder whose inside communicates with a connection portion between the ejector body 2 and the injection cylinder portion 11 in the vertical supply cylinder portion 10 through the supply hole 95a. 90 and the storage cylinder 90 is movably disposed in the front-rear direction (axial direction) along the central axis O 2, and the rear side (one side) of the front-rear direction as the liquid is supplied into the storage cylinder 90. And a negative pressure plunger 93 connected to the storage plunger 91 and linked to the movement of the storage plunger 91 in the front-rear direction, and extending along the front-rear direction and the front end opening (the other end opening in the axial direction) And a negative pressure cylinder 94 in which a negative pressure plunger 93 is movably accommodated toward the rear side.

(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 liquid is introduced from the main cylinder 53 into the inner cylinder 13 by pulling the trigger part 51 backward, this liquid is introduced into the injection cylinder part 11, the injection hole 25, the passage space 183, the introduction path 186, and the turning circuit 12e. It can inject toward the front from the ejection hole 4 through. At this time, the hydraulic pressure of the liquid introduced into the inner cylinder 13 is applied to the convex portion 113 through the supply hole 95a, whereby the storage plunger 91 is moved rearward from the most advanced position, and the storage cylinder 90 is passed through the supply hole 95a. Liquid can also be introduced into the interior.
Therefore, the liquid can be ejected forward from the ejection hole 4, and at the same time, the storage plunger 91 can be moved rearward.

When the operation of pulling the trigger portion 51 is stopped and the liquid in the container A is introduced into the main cylinder 53, the supply of the liquid from the main cylinder 53 to the ejection hole 4 is stopped, but the inside of the negative pressure cylinder 94 is stopped. Due to the negative pressure, the negative pressure plunger 93 and the storage plunger 91 integrally start to move forward toward the most advanced position. As a result, the liquid accumulated in the storage cylinder 90 is guided to the ejection hole 4 through the vertical supply cylinder portion 10, the injection cylinder portion 11, the passage space 183, the introduction path 186, and the turning circuit 12 e, and is liquid forward through the ejection hole 4. Can be injected.
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.

  As described above, according to the trigger type liquid ejector 350 according to the present embodiment, the same effects as those of the embodiment can be achieved.

  In addition, since the outer fitting cylindrical portion 221 of the nozzle body 152 is formed to be attachable to the second cylindrical portion 23 of the ejector body 2, the nozzle member 3 does not have the storage cylinder 90, the storage plunger 91, and the like. The trigger-type liquid ejector having an existing configuration in which only the nozzle body 152 is provided and the outer fitting cylinder portion 221 of the nozzle body 152 is mounted on the second cylinder portion 23 of the ejector body 2 is not changed in design. In addition, it can be used as it is.

  Further, when the trigger part 51 is pulled backward, a part of the liquid from the injection cylinder part 11 can reach the ejection hole 4 without passing through the supply hole 95a and the storage cylinder 90, Even before the liquid is stored in the storage cylinder 90, the liquid can be stably ejected.

  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, the storage cylinder 90 and the negative pressure cylinder 94 are integrally formed, and the storage cylinder 90 is formed in a double cylinder disposed inside the negative pressure cylinder 94, and the storage plunger 91 and the negative pressure plunger 93 are formed. Of the trigger type liquid ejector 400 shown in FIG. 9C in a configuration in which the storage plunger 91 is formed in a double cylinder disposed inside the negative pressure plunger 93. As described above, a communication hole 407 for communicating the inside of the storage plunger 91 and the inside of the storage cylinder 90 is formed in the plunger cylinder 110 (circumferential wall portion) of the storage plunger 91 while keeping the inside of the storage plunger 91 in a reduced pressure state. Also good.

  In this case, the negative pressure in the storage plunger 91 is exerted on the negative pressure plunger 93 through the communication hole 407. Therefore, it becomes possible to make the movement toward the front of the storage plunger 91 and the negative pressure plunger 93 after storing the liquid in the storage cylinder 90 smooth, and the liquid injection mode can be stabilized. Furthermore, the occurrence of dripping can be suppressed, and the remaining of air in the space located between the negative pressure cylinder 94 and the negative pressure plunger 93 can also be suppressed.

In the illustrated example, a plug member 401 is fitted in the rear end portion of the storage plunger 91.
The plug member 401 is formed with a seal portion 402 fitted in the storage plunger 91, and has a smaller diameter than the seal portion 402, and protrudes forward from the seal portion 402. A pushing projection 403 that pushes the portion toward the front, and an elastically deformable elastic projection 404 that projects rearward from the seal portion 402.
A plurality of elastic protrusions 404 are arranged around the central axis O2 of the storage cylinder 90 with a space therebetween. At the rear end portion of the elastic projection piece 404, an outer locking projection portion 405 protruding outward and locked to the rear end opening edge of the storage plunger 91, and a front end of an insertion jig 410 that protrudes inward and will be described later And an inner engagement protrusion 406 that engages with the portion 413.

The trigger type liquid ejector 400 configured as described above is formed as follows.
First, the insertion jig 410 shown in FIGS. 9A and 9B will be described. The insertion jig 410 is used when the storage plunger 91 and the negative pressure plunger 93 are inserted into the storage cylinder 90 and the negative pressure cylinder 94 and the plug member 401 is attached to the storage plunger 91.
The insertion jig 410 includes a rear base portion 411 having an outer diameter larger than the inner diameter of the storage plunger 91, a columnar intermediate portion 412 that protrudes forward from the rear base portion 411 and is inserted into the storage plunger 91, and a front portion from the intermediate portion 412. And a front end portion 413 located at the front end.
An open groove 414 extending from the outer peripheral edge to the center side is formed on the front end surface of the rear base portion 411. The front end surface 412a of the intermediate portion 412 extends gradually rearward from the outer peripheral edge side toward the center side. The front end 413 is formed in a spherical shape.

When forming the trigger-type liquid ejector 400 using the insertion jig 410, first, the plug member 401 is inserted into the storage plunger 91, and the pushing protrusion is formed while elastically deforming the rear end of the elastic protrusion 404. 403 is abutted against the blocking wall 111. At this time, the air between the plug member 401 and the storage plunger 91 is discharged to the outside through the communication hole 407, for example. Thereby, the assembly body formed by assembling the storage plunger 91, the negative pressure plunger 93, and the plug member 401 is formed.
Thereafter, the front end portion 413 of the insertion jig 410 is abutted against the rear surface of the seal portion 402 of the plug member 401, and the front end surface 412 a of the intermediate portion 412 of the insertion jig 410 is abutted against the rear end portion of the elastic protrusion 404. Then, the assembly is set on the insertion jig 410. At this time, the insertion jig 410 is inserted into the storage plunger 91 up to a portion located in front of the rear base 411.

  Then, by pushing the insertion jig 410 forward with respect to the storage cylinder 90 and the negative pressure cylinder 94, the storage plunger 91 and the negative pressure plunger 93 are moved forward in the storage cylinder 90 and the negative pressure cylinder 94. . At this time, the air in the space located between the negative pressure cylinder 94 and the negative pressure plunger 93 is between the inner peripheral surface of the negative pressure plunger 93 and the outer peripheral surface of the storage cylinder 90, and the inner peripheral surface of the storage cylinder 90. It is discharged to the outside through the outer peripheral surface of the storage plunger 91, between the communication hole 407 of the storage plunger 91, between the insertion jig 410 and the inner peripheral surface of the storage plunger 91, and through the open groove 414 of the rear base 411.

  Then, after the closing wall 111 of the storage plunger 91 reaches the front wall portion 95 of the storage cylinder 90, as shown in FIG. 9B, when the insertion jig 410 is moved backward, the front end of the insertion jig 410 The part 413 engages with the inner engagement protrusion 406 of the elastic protrusion 404, so that the elastic protrusion 404 moves backward while the outer locking protrusion 405 slides on the inner peripheral surface of the storage plunger 91. To do. At this time, the space located in front of the plug member 401 in the storage plunger 91 is decompressed. As a result, even if air remains in the space located between the negative pressure cylinder 94 and the negative pressure plunger 93, this air is generated between the inner peripheral surface of the negative pressure plunger 93 and the outer peripheral surface of the storage cylinder 90. In between, between the inner peripheral surface of the storage cylinder 90 and the outer peripheral surface of the storage plunger 91 and through the communication hole 407 of the storage plunger 91, it is sucked into the storage plunger 91 and discharged.

After that, when the outer locking protrusion 405 of the elastic protrusion 404 reaches the rear end opening edge of the storage plunger 91, the elastic protrusion 404 is restored and deformed outward, so that the elastic protrusion 404 is locked outward. The protrusion 405 is locked to the rear end opening edge of the storage plunger 91.
When the insertion jig 410 is further moved backward, the front end portion 413 of the insertion jig 410 gets over the inner engagement protrusion 406 rearward, and the insertion jig 410 is detached from the plug member 401. Thereafter, for example, by attaching the remaining parts, a trigger type liquid ejector 400 as shown in FIG. 9C is formed.

  In the above-described embodiment, the storage plunger 91 and the negative pressure plunger 93 move rearward as the liquid is supplied into the storage cylinder 90, but the present invention is not limited to this. For example, it is possible to employ a configuration in which the storage plunger 91 and the negative pressure plunger 93 move forward as the liquid is supplied into the storage cylinder 90. Further, the central axis O2 of the storage cylinder 90 extends in a direction different from the front-rear direction, and the storage plunger 91 and the negative pressure plunger 93 move in the axial direction along the central axis O2 (a direction different from the front-rear direction). It is also possible to adopt a configuration to

In the embodiment, the locked portion 97 is formed on the negative pressure plunger 93, but may be formed on the storage plunger 91.
In the above embodiment, the pressure receiving area of the negative pressure plunger 93 is larger than the pressure receiving area of the storage plunger 91, but it may be smaller or equivalent.
In the embodiment, the storage cylinder 90 and the negative pressure cylinder 94 are integrally formed, but may be separate. The storage cylinder 90 and the negative pressure cylinder 94 may not be double cylinders.
In the above embodiment, the storage plunger 91 and the negative pressure plunger 93 are integrally formed, but may be separate. The storage plunger 91 and the negative pressure plunger 93 may not be a double cylinder.

In the above embodiment, the trigger portion 51 is swingable backward, but it is possible to appropriately adopt a form in which the trigger portion 51 moves backward. For example, the trigger unit 51 may be slidable backward.
In the above embodiment, the negative pressure plunger 93 and the storage plunger 91 are restored and moved by using the negative pressure in the negative pressure cylinder 94 without using the biasing force acting from other members such as the biasing member. However, the present invention is not limited to this. In addition to the negative pressure in the negative pressure cylinder 94, for example, the negative pressure plunger 93 and the storage plunger 91 are restored by using an urging force acting on the negative pressure plunger 93 and the storage plunger 91 from an urging member such as a metal spring. It may be moved.

  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.

1, 350, 400 Trigger type liquid ejector 2 Ejector body 3 Nozzle member 4 Ejection hole 10 Vertical supply cylinder part 11 Injection cylinder part 50 Trigger mechanism 51 Trigger part 90 Storage cylinder 91 Storage plunger 93 Negative pressure plunger 94 Negative pressure cylinder 95a Supply hole 97 Locked portion 98 Restriction portion A Container body O2 Center axis

Claims (4)

An ejector body mounted on a container body containing a liquid;
A nozzle member disposed on the front side of the ejector body and having a nozzle hole formed to eject liquid toward the front;
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 movably disposed rearward in a forward-biased state. By moving the trigger portion rearward, liquid is supplied into the vertical supply tube portion. A trigger liquid ejector comprising: a trigger mechanism that is introduced into the injection cylinder part from the inside of the injection cylinder part toward the ejection hole side,
A storage cylinder in which liquid that has passed through the vertical supply cylinder portion is supplied to the inside by movement of the trigger portion to the rear; and
A storage plunger disposed in the storage cylinder so as to be movable in an axial direction along a central axis thereof, and moving toward one side in the axial direction in accordance with the supply of the liquid into the storage cylinder;
A negative pressure plunger connected to the storage plunger and linked to the axial movement of the storage plunger;
A negative pressure cylinder that extends along the axial direction and is blocked from communication with the other end opening in the axial direction and outside, and in which the negative pressure plunger is movably accommodated toward one side in the axial direction; A trigger type liquid ejector characterized by comprising:   The trigger type liquid ejector according to claim 1, wherein a pressure receiving area of the negative pressure plunger is larger than a pressure receiving area of the storage plunger. The storage cylinder and the negative pressure cylinder are integrally formed, and the storage cylinder is formed in a double cylinder shape disposed inside the negative pressure cylinder,
The said storage plunger and the said negative pressure plunger are formed integrally, and the said storage plunger is formed in the double cylinder shape arrange | positioned inside the said negative pressure plunger. 2. The trigger type liquid ejector according to 2. From a locked portion formed on at least one of the storage plunger and the negative pressure plunger, provided with a restricting portion disposed away from one side in the axial direction,
When the storage plunger and the negative pressure plunger move toward one side in the axial direction, the restricting portion comes into contact with the locked portion from the other side in the axial direction. The trigger type liquid ejector according to any one of claims 1 to 3, wherein the movement toward the one side in the axial direction is restricted.

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