JP2017132518A - Trigger type liquid jetting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type liquid jetting tool capable of continuously jetting a liquid.SOLUTION: A trigger type liquid jetting tool 1 comprises: a storage cylinder 90 to which a liquid is supplied; a storage plunger 91 which moves to one side of an axial direction following to supply of the liquid into the storage cylinder 90; a negative pressure plunger 93 which is connected to the storage plunger 91; a negative pressure cylinder 94 in which the negative pressure plunger 93 is movably stored; an auxiliary cylinder 140 which is provided independently from the storage plunger 91; an auxiliary plunger 150 which is movably provided in the auxiliary cylinder 140; and a communication path 160 for communicating a part which is positioned between the negative pressure cylinder 94 and the negative pressure plunger 93, and a part which is positioned between the auxiliary cylinder 140 and the auxiliary plunger 150. The auxiliary cylinder 140 is closed at one end opening in an axial line O3 direction, and the auxiliary plunger 150 is stored movably toward the other side of the axial line O3 direction.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-described problems, a trigger type liquid ejector according to the present invention is disposed on a front side of an ejector body attached to a container body in which a liquid is stored, and the liquid is forwarded. A nozzle member in which an ejection hole for injecting the liquid is formed, wherein the ejector body extends in the vertical direction and sucks up the liquid in the container body, and the vertical supply cylinder portion An injection tube portion for guiding the liquid in the vertical supply tube portion to the ejection hole, and a trigger portion disposed in front of the vertical supply tube portion so as to be movable rearward in a forward biased state. A trigger mechanism that causes the liquid to flow from the inside of the vertical supply cylinder part to the side of the ejection hole by moving the trigger part to the rear, and the trigger type liquid ejector, The vertical supply by moving the part backward A storage cylinder in which the liquid that has passed through the section is supplied; and a storage cylinder that is movably disposed in the storage cylinder in an axial direction along a central axis thereof. A storage plunger in which the other end opening in the axial direction is closed, and a negative pressure plunger connected to the storage plunger and linked to the movement of the storage plunger in the axial direction. A negative pressure cylinder extending along the axial direction, the other end opening in the axial direction being closed, and the negative pressure plunger being movably accommodated toward one side in the axial direction; and the storage plunger An auxiliary cylinder disposed independently of the auxiliary cylinder, an auxiliary plunger disposed inside the auxiliary cylinder so as to be movable in an axial direction along a central axis thereof, and the negative pressure cylinder A communication passage that communicates a portion located on the other side in the axial direction from the negative pressure plunger and a portion located between the auxiliary cylinder and the auxiliary plunger. The one end opening in the axial direction is closed, and the auxiliary plunger is accommodated in the auxiliary cylinder so as to be movable toward the other side in the axial direction.

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 is sucked up and introduced into the vertical supply cylinder part. The liquid that has passed through is ejected from the ejection hole through the inside of the injection cylinder. At the same time, the liquid that has passed through the vertical supply cylinder is also introduced into the storage cylinder. When the liquid is introduced into the storage cylinder, the storage plunger in the storage cylinder moves along with the negative pressure plunger toward one side in the axial direction. At this time, a portion of the negative pressure cylinder located on the other side in the axial direction with respect to the negative pressure plunger is a sealed space. Therefore, when the negative pressure plunger moves to one side in the axial direction, the sealed space becomes negative pressure. Thereby, the urging | biasing force toward the other side of the said axial direction can be generated 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 the liquid into the vertical supply cylinder portion stops, but the negative pressure plunger and the storage plunger are directed toward the other side in the axial direction due to the negative pressure in the negative pressure cylinder. It begins to restore and move together. Thereby, the liquid with which the storage cylinder was filled can be pushed out from the storage cylinder toward the ejection hole side, and can be continuously ejected from the ejection hole.
Therefore, not only when the trigger part is pulled backward, but also when the trigger part is not operated, the liquid can be ejected 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 of the storage cylinder in the axial direction. The pulling operation can be repeated. 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. Therefore, even in this case, the liquid can be gradually stored 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, a thrust can be provided to a negative pressure plunger and a storage plunger, aiming at simplification of a structure.
As a general urging member, use of a metal spring, for example, is conceivable, but by not using this type of urging member, the trigger type liquid ejector can be formed only by a synthetic resin material. Become.

In particular, the portion of the negative pressure cylinder that is located on the other side in the axial direction from the negative pressure plunger by moving the auxiliary plunger in advance to the one side in the axial direction with respect to the auxiliary cylinder before continuous injection. The (sealed space) can be depressurized through the communication path. Thereby, when a negative pressure plunger moves to the one side of the said axial direction, the said sealed space can be reliably made into a negative pressure state.
Therefore, it is possible to suppress a decrease in the thrust applied to the storage plunger from the beginning to the end in the process of continuously injecting the liquid after the liquid is stored in the storage cylinder. Therefore, it is possible to stabilize the liquid ejection state and to improve the liquid running out.
At this time, since the auxiliary cylinder is disposed independently of the storage plunger, it is possible to prevent an increase in the weight of the storage plunger due to the provision of the auxiliary cylinder and the auxiliary plunger. It can be moved smoothly in the axial direction. Thereby, the stability of the injection state mentioned above and favorable liquid running out can be implement | achieved reliably.

The trigger mechanism includes a main piston that moves in the front-rear direction in conjunction with the movement of the trigger portion, an inside that is pressurized and depressurized along with the movement of the main piston, and the inside that is in communication with the vertical supply cylinder portion. A main cylinder, and the auxiliary cylinder may be disposed on the opposite side of the main cylinder with the vertical supply cylinder portion interposed therebetween.
In this case, since the auxiliary cylinder is disposed on the opposite side of the main cylinder across the vertical supply cylinder, the up-and-down bulkiness of the trigger type liquid ejector due to the provision of the auxiliary cylinder and the auxiliary plunger is provided. Can be suppressed.

An upper end portion of the vertical supply cylinder portion is connected to an intermediate portion of the storage cylinder in the axial direction, and a main cylinder is located below a portion of the storage cylinder that protrudes from the vertical supply cylinder portion to the other side in the axial direction. An auxiliary cylinder may be disposed below the portion that is disposed and projects to one side in the axial direction.
In this case, it is possible to reliably suppress vertical and radial bulkiness of the trigger type liquid ejector due to the provision of the auxiliary cylinder and the auxiliary plunger.

  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 an embodiment of a trigger type liquid ejector concerning the present invention. It is the longitudinal cross-sectional view which expanded the ejector main body periphery in the trigger type liquid ejector shown in FIG. It is the elements on larger scale of the B section in FIG. It is the longitudinal cross-sectional view which expanded the nozzle member periphery in the trigger type liquid ejector shown in FIG. It is a longitudinal cross-sectional view which shows the state which pulled the auxiliary cylinder back from the state shown in FIG. It is a longitudinal cross-sectional view which shows the state which pulled the trigger part to the back side from the state shown in FIG. 1, and is performing the continuous ejection.

Hereinafter, an embodiment of a trigger type liquid ejector according to the present invention will be described with reference to FIGS. 1 to 6.
As shown in FIG. 1, the trigger type liquid ejector 1 of this embodiment is arrange | positioned at the front side of the ejector main body 2 with which the container body A in which the liquid was accommodated, and the ejector main body 2, and is made to supply a liquid. An ejection hole 4 for ejecting forward is formed, and a nozzle member 3 attached to the ejector body 2 is provided.
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. The direction along the axis O1 is referred to as the vertical direction, and in a plan view viewed from the vertical direction, one direction orthogonal to the axis O1 is referred to as the front-rear direction, and the direction orthogonal to both the vertical direction and the front-rear direction is referred to as the horizontal direction. .

As shown in FIGS. 1 and 2, the ejector main body 2 extends in the vertical direction, and extends in front of the vertical supply cylinder 10 and the vertical supply cylinder 10 that sucks up the liquid in the container body A. , An injection cylinder part 11 for guiding the liquid in the vertical supply cylinder part 10 to the ejection hole 4, and a trigger part 51 disposed in front of the vertical supply cylinder part 10 so as to be movable rearward in a forward biased state, And a trigger mechanism 50 that causes the liquid to flow from the inside of the vertical supply cylinder portion 10 through the inside of the injection cylinder portion 11 to the ejection hole 4 by the rearward movement of the trigger portion 51.
Of the front and rear directions, the direction in which the injection cylinder 11 is located with respect to the vertical supply cylinder 10 is referred to as the front side or the front, and the opposite direction is referred to as the rear or the rear.

The vertical supply cylinder portion 10 includes a top cylinder-shaped outer cylinder 12 and an inner cylinder 13 fitted in 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 top wall portion 12d is provided with a seal cylinder portion 12e and a regulation protrusion 12f. Both the seal cylinder portion 12e and the restriction projection 12f extend downward from the top wall portion 12d and are arranged coaxially with the axis O1. The seal cylinder portion 12e surrounds the restriction projection 12f from the outside.

  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. The seal tube portion 12e is fitted in the upper end portion of the small diameter portion 13b.

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.
Note that the axis O1 of the vertical supply cylinder portion 10 constituted 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.

An annular tapered cylindrical portion 35 that protrudes inward is formed on a portion of the inner peripheral surface of the inner cylinder 13 that is positioned below the seal cylinder portion 12e and above the upper end of the pipe 15. ing.
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 portion 35 and a space located below the tapered cylinder portion 35.

  Further, the ejector body 2 includes a connecting tube portion 30 extending forward from the vertical supply tube portion 10, a closing plug 31 for closing the front end opening of the connecting tube portion 30, and a connecting tube portion in the outer tube 12. And a cylinder cylinder portion 40 formed integrally with a portion located below 30.

The inside of the connection cylinder part 30 communicates with the inside of the vertical supply cylinder part 10. The rear end portion of the connection tube portion 30 is connected to the front side of the upper end portion of the vertical supply tube portion 10. The rear end opening of the connection cylinder part 30 opens into the seal cylinder part 12e.
The blocking plug 31 is closely fitted in the connecting cylinder part 30. The blocking plug 31 is provided with a protruding portion 34 that protrudes rearward. The protruding part 34 reduces the flow path cross-sectional area of the connecting cylinder part 30.

  The cylinder cylinder portion 40 protrudes forward from the outer cylinder 12 and opens forward. The cylinder cylinder portion 40 is disposed between the connection cylinder portion 30 and the flange portion 12c. The cylinder cylinder part 40 is arranged in parallel with the connection cylinder part 30 and the flange part 12c in the vertical direction. The cylinder cylinder portion 40 includes partition walls W1 and W2 common to the connection cylinder portion 30 and the flange portion 12c.

  The trigger type liquid ejector 1 includes a storage cylinder 90 extending in the front-rear direction, a storage plunger 91 disposed in the storage cylinder 90 so as to be movable in the front-rear direction, and a negative pressure connected to the storage plunger 91. A plunger 93, a negative pressure cylinder 94 in which the negative pressure plunger 93 is movably accommodated rearward, and a storage valve 32 that allows the supply of liquid from the connection cylinder 30 into the storage cylinder 90; It has.

  The storage cylinder 90 is formed with a supply hole 95 a that communicates with the connection cylinder portion 30. In the storage cylinder 90, the liquid that has passed through the vertical supply cylinder 10 and the connection cylinder 30 is supplied through the supply hole 95a by swinging (moving) the trigger 51 described later. The storage cylinder 90 extends in the front-rear direction and is disposed above the connecting cylinder portion 30. The connecting cylinder part 30 and the storage cylinder 90 are arranged in parallel in the vertical direction and have a common partition wall W3. The storage cylinder 90 is disposed in parallel with the connecting cylinder portion 30 and the cylinder cylinder portion 40. In the illustrated example, the storage cylinder 90 is also disposed on the vertical supply cylinder portion 10. The vertical supply cylinder part 10 and the storage cylinder 90 are provided with a common partition wall W4. The partition wall W4 is formed by the top wall portion 12d.

As shown in FIG. 4, the storage cylinder 90 includes a front wall portion 95 and a storage 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 mounting recess 97 formed in an annular shape in the front wall portion 95 and a communication hole 104 penetrating the front wall portion 95 in the front-rear direction. The mounting recess 97 is formed in an annular shape coaxial with the central axis O <b> 2 of the storage cylinder 90. The mounting recess 97 is formed on the rear end surface of the front wall portion 95. The communication hole 104 is disposed inside the mounting recess 97 in a front view when the front wall portion 95 is viewed from the front-rear direction.

  The storage cylinder cylinder 96 is formed in a multistage cylinder shape that gradually increases in diameter from the front side toward the rear side. The storage cylinder cylinder 96 includes a small-diameter front cylinder part 112, a large-diameter rear cylinder part 113, and a step part 114 that connects the front cylinder part 112 and the rear cylinder part 113. The stepped portion 114 gradually increases in diameter from the front side toward the rear side. The rear cylinder portion 113 protrudes rearward from the vertical supply cylinder portion 10. The front cylinder portion 112 constitutes the partition wall W3. The step portion 114 and the front end portion of the rear cylinder portion 113 constitute the partition wall W4.

The storage cylinder cylinder 96 is formed with the supply hole 95 a, a communication groove 115 provided at the rear end portion of the front cylinder portion 112, and a recovery hole 116 disposed at the front end portion of the rear cylinder portion 113. Yes. The supply hole 95 a is provided at the front end portion of the front cylinder portion 112. The supply hole 95a penetrates the partition wall W3 in the vertical direction. The supply hole 95a exposes the protruding portion 34 upward. The communication groove 115 is provided on the inner peripheral surface of the front tube portion 112. The communication groove 115 extends in the front-rear direction and opens rearward. A plurality of communication grooves 115 are arranged around the central axis O <b> 2 of the storage cylinder 90 at intervals. The recovery hole 116 penetrates the partition wall W4 in the vertical direction. One recovery hole 116 is disposed on each side in the left-right direction. The recovery hole 116 communicates with a recovery passage 117 provided in the ejector body 2.
As shown in FIG. 1, the recovery passage 117 vertically cuts the vertical supply cylinder portion 10 in the vertical direction. The collection passage 117 penetrates the small diameter portion 13b in the vertical direction and communicates with the large diameter portion 13a. One collection passage 117 is arranged on each side in the left-right direction. Each collection passage 117 communicates the two collection holes 116 and the container body A separately.

The storage cylinder 90 and the negative pressure cylinder 94 are integrally formed. In the illustrated example, the storage cylinder 90 and the negative pressure cylinder 94 are formed in a double cylinder shape in which the storage cylinder 90 is disposed inside the negative pressure cylinder 94 as a whole. Both the storage cylinder 90 and the negative pressure cylinder 94 are arranged behind the injection cylinder 11 and extend in the front-rear direction. Therefore, the storage cylinder 90 and the negative pressure cylinder 94 are arranged in parallel to the injection cylinder portion 11.
In the present embodiment, the upper end portion of the vertical supply cylinder portion 10 is connected to an intermediate portion in the front-rear direction of the storage cylinder 90. In the illustrated example, the upper end portion of the vertical supply cylinder portion 10 integrally extends over the rear end portion of the front cylinder portion 112, the step portion 114, and the front end portions of the rear cylinder portion 113 of the storage cylinder tube 96 of the storage cylinder 90. Connected.

The negative pressure cylinder 94 is located behind the vertical supply cylinder portion 10.
The negative pressure cylinder 94 includes an annular negative pressure flange 130 projecting radially outward from the outer peripheral surface of the storage cylinder cylinder 96, a negative pressure cylinder cylinder 131 extending rearward from the negative pressure flange 130, It has. As a result, the front end opening of the negative pressure cylinder 94 is closed by the negative pressure flange 130.

The negative pressure flange 130 is disposed coaxially with the central axis O <b> 2 of the storage cylinder 90 and closes the front end opening of the negative pressure cylinder cylinder 131. The lower end portion of the negative pressure flange 130 is formed integrally with the upper end portion of the outer cylinder 12. The negative pressure cylinder cylinder 131 extends rearward from the outer peripheral edge of the negative pressure flange 130.
The rear end portion of the negative pressure cylinder cylinder 131 is in contact with the inner surface of the cover body 55.

As shown in FIG. 4, the storage valve 32 is a check valve that regulates the outflow of liquid from the storage cylinder 90 through the supply hole 95 a into the connection cylinder portion 30.
The storage valve 32 includes a valve base portion 118 formed in an annular shape coaxial with the central axis O2 of the storage cylinder 90, and a valve body portion 119 formed in a cylindrical shape protruding rearward from the valve base portion 118. Yes. The valve base 118 is disposed on the rear end surface of the front wall portion 95. The valve base 118 includes a mounting protrusion 120 that is mounted in the mounting recess 97.
The valve body 119 can be elastically deformed inward in the radial direction of the valve body 119. The rear end portion of the valve body portion 119 is detachably seated on the inner peripheral surface of the storage cylinder cylinder 96. The rear end portion of the valve body portion 119 is located on the rear side of the supply hole 95a. The valve body portion 119 closes the supply hole 95a so as to be opened and closed from the inside of the storage cylinder 90.

The storage plunger 91 moves toward the rear side (one side) in the front-rear direction as the liquid is supplied into the storage cylinder 90, and the rear end opening is closed. The storage plunger 91 is formed in a cylindrical shape extending in the front-rear direction.
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 multistage cylinder shape that gradually increases in diameter from the front side toward the rear side. A first lip portion 124 and a second lip portion 125 are provided on the outer peripheral surface of the plunger cylinder 110. The first lip portion 124 and the second lip portion 125 are formed over the entire circumference of the plunger cylinder 110 in the circumferential direction.
The first lip portion 124 and the second lip portion 125 slide densely in the front-rear direction on the inner peripheral surface of the storage cylinder cylinder 96. A pair of the first lip portion 124 and the second lip portion 125 is disposed at an interval in the front-rear direction. The first lip portion 124 slides on the inner peripheral surface of the front cylinder portion 112. The second lip part 125 slides on the inner peripheral surface of the rear cylinder part 113.

  The front end surface of the blocking wall 111 is in contact with the rear end surface of the valve base 118. As a result, the blocking wall 111 closes the communication hole 104. The blocking wall 111 is detachably seated on the valve base 118 toward the rear side. A convex portion 126 and a concave groove 127 are formed on the front end surface of the blocking wall 111. The protrusion 126 protrudes forward from the blocking wall 111. The convex portion 126 is disposed in the valve base 118. The concave groove 127 extends in the radial direction of the storage plunger 91. The concave groove 127 opens toward the outside in the radial direction. In a state where the front end surface of the blocking wall 111 is in contact with the rear end surface of the valve base 118, communication between the concave groove 127 and the communication hole 104 is blocked.

  The storage plunger 91 and the negative pressure plunger 93 are integrally formed, and the negative pressure plunger 93 is linked to the movement of the storage plunger 91 in the axial direction. In the illustrated example, the storage plunger 91 and the negative pressure plunger 93 are formed in a double cylinder shape in which the storage plunger 91 is disposed inside the negative pressure plunger 93 as a whole. The storage plunger 91 and the negative pressure plunger 93 are arranged coaxially with the central axis O <b> 2 of the storage cylinder 90.

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.
The negative pressure plunger 93 includes a negative pressure main body cylinder 132 extending in the front-rear direction, an annular plunger wall 133 projecting from the front end portion of the negative pressure main body cylinder 132 toward the outer side in the radial direction, and the rear end of the storage cylinder cylinder 96. And a connecting ring part 134 located behind the opening edge. The connecting ring part 134 connects the rear end part of the negative pressure main body cylinder 132 and the rear end part of the plunger cylinder 110 of the storage plunger 91.
A third lip portion 128 that protrudes rearward is formed at the radially outer end of the plunger wall 133. The third lip portion 128 extends over the entire circumference in the circumferential direction. The third lip portion 128 slides densely in the front-rear direction on the inner peripheral surface of the negative pressure cylinder tube 131.

The pressure receiving area of the negative pressure plunger 93 is set to be larger than the pressure receiving area of the storage plunger 91.
Specifically, when the outer surface of each of the negative pressure plunger 93 and the storage plunger 91 is projected onto a projection plane orthogonal to the central axis O2 of the storage cylinder 90, a negative appearing in an annular shape coaxial with the central axis O2 on the projection plane. The shadow area of the pressure plunger 93 (projected area of the negative pressure plunger 93) is set larger than the shadow area of the storage plunger 91 (projected area of the storage plunger 91) appearing in a circular shape coaxial with the central axis O2 on the projection plane. ing.

The projected area of the negative pressure plunger 93 is such that, on the projection plane, the radial inner end of the negative pressure plunger 93 (in the illustrated example, the inner peripheral edge of the connecting ring portion 134) and the radial outer end (shown in the figure). In the example, it is the area of the portion located between the outer peripheral edge of the third lip portion 128).
The projected area of the storage plunger 91 is the area of the portion located on the inner side of the projection surface on the radially outer end of the storage plunger 91 (in the illustrated example, the outer peripheral edge of the first lip portion 124).

  As shown in FIGS. 1 and 4, the injection cylinder portion 11 guides the liquid in the vertical supply cylinder portion 10 to the ejection holes 4. The injection cylinder portion 11 extends forward from the storage cylinder 90. The injection cylinder portion 11 protrudes forward from the front wall portion 95. The inside of the injection cylinder part 11 is communicated with the vertical supply cylinder part 10 through the communication hole 104, the valve base part 118, the storage cylinder 90, the supply hole 95 a and the connection cylinder part 30.

  As shown in FIGS. 1 and 2, the trigger mechanism 50 extends downward from the injection cylinder part 11 and is swingable backward (movable) in a forward biased state in front of the vertical supply cylinder part 10. Trigger portion 51, main piston 52 moving in the front-rear direction in conjunction with the swing (movement) of trigger portion 51, the inside is pressurized and depressurized as the main piston 52 moves, and the inside is vertically At least the upper and left and right sides of the main cylinder 53 communicating with the inside of the supply cylinder part 10, the elastic plate part 54 for urging the trigger part 51 forward, the vertical supply cylinder part 10, the injection cylinder part 11, and the storage cylinder 90 And a cover body 55 covering from the direction.

  The main cylinder 53 communicates with the vertical supply cylinder portion 10. 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 main stopper 53 is formed integrally with the main cylinder 53.

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 13c of the inner cylinder 13 is formed with a third ventilation hole 65 that communicates the gap S1 with the inside of the large diameter portion 13a of the inner cylinder 13 and 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 passes through the second through-hole 67 formed in the inner cylinder 13 of the vertical supply cylinder portion 10, and is in a space located between the seal cylinder portion 12 e and the suction valve 36 in the inner cylinder 13. Communicate.
Thereby, the inside of the main cylinder 53 communicates with the space located between the seal cylinder portion 12e and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. . Therefore, the suction valve 36 switches communication between the container body A and the main cylinder 53 and blocking of the communication.

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 cylinder part 73 is formed in a tapered shape that gradually increases in diameter from the center part in the front-rear direction toward the front and rear, and the sliding contact parts 73a located at both ends in the front-rear direction are the inner circumference of the outer cylinder part 60 Make sliding contact with the surface.

  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. The upper plate member 84 is disposed on the injection cylinder portion 11 via a mounting cylinder 92 described later.
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 plate spring 54a and the sub plate 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 latching 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 a restriction wall 123 described later by the urging by the elastic plate portion 54 from the rear. 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.

  The nozzle member 3 is disposed on the front side of the ejector body 2. The nozzle member 3 includes a nozzle plate 105 whose front and back faces in the front-rear direction, a mounting cylinder 92 protruding rearward from the nozzle plate 105, a regulation wall 123 protruding downward from the mounting cylinder 92, An insertion portion 201 extending rearward along the mounting cylinder 92, a nozzle shaft portion 100 protruding forward from the nozzle plate 105, and a surrounding tube 101 surrounding the nozzle shaft portion 100 from the outside are provided. Yes.

  The nozzle plate 105 covers the front end opening of the injection cylinder portion 11 from the front. The nozzle plate 105 is disposed at the opening edge of the front end of the injection cylinder part 11. The mounting cylinder 92 is closely fitted on the injection cylinder portion 11. A connection hole 106 is formed in the nozzle plate 105. The connection hole 106 is disposed inside the mounting cylinder 92 in a plan view of the nozzle plate 105 viewed from the front-rear direction. Since the lower end portion of the restriction wall 123 abuts against the upper end portion of the main plate member 80 of the trigger portion 51 from the front, the restriction wall 123 positions the trigger portion 51 at the foremost swing position.

  The insertion portion 201 is inserted over substantially the entire length in the front-rear direction in the injection cylinder 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. The gap S3 communicates with the connection hole 106.

The surrounding cylinder 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. The nozzle shaft portion 100 is fitted with a nozzle cap 103 in which an ejection hole 4 opening forward is formed, and the flow passage 102 and the ejection hole 4 communicate with each other. The flow passage 102 communicates with the connection hole 106.
As a result, the inside of the storage cylinder 90 communicates with the ejection hole 4 through the communication hole 104, the injection cylinder portion 11, the connection hole 106 and the flow passage 102. That is, the communication hole 104 communicates the inside of the storage cylinder 90 and the ejection hole 4.

  Note that the position of the storage plunger 91 when the front end surface of the blocking wall 111 is in contact with the rear end surface of the valve base 118 as shown in FIG. When the storage plunger 91 is 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.

  As shown in FIG. 6, when the connecting ring portion 134 of the negative pressure plunger 93 comes into contact with the cover body 55 from the front side after the storage plunger 91 moves toward the rear side, the storage plunger 91 is more than this. Movement toward the rear side is restricted. The position of the storage plunger 91 at that time is defined as the last retracted position. At this time, the maximum amount of liquid is stored in the storage cylinder 90.

  In the present embodiment, the trigger type liquid ejector 1 is disposed independently of the storage plunger 91 and is disposed inside the auxiliary cylinder 140 and in the auxiliary cylinder 140 so as to be movable in the front-rear direction. And an auxiliary plunger 150 provided. The auxiliary cylinder 140 and the auxiliary plunger 150 are arranged coaxially. The central axis O3 of the auxiliary cylinder 140 extends in the same direction as the central axis O2 of the storage cylinder 90 in parallel.

As shown in FIGS. 1 and 2, the auxiliary cylinder 140 includes a cylindrical auxiliary cylinder cylinder 141 whose front end opening is closed by a closing wall 141 a, and a lid body 142 that is externally fitted to the rear end portion of the auxiliary cylinder cylinder 141. And.
The auxiliary cylinder cylinder 141 is disposed below the storage cylinder 90 and behind the vertical supply cylinder section 10 on the opposite side of the main cylinder 53 with the vertical supply cylinder section 10 interposed therebetween. The closing wall 141 a of the auxiliary cylinder cylinder 141 is formed integrally with the vertical supply cylinder portion 10.
The lid 142 has a through-hole 142a penetrating in the front-rear direction. The through-hole 142a includes a circular portion disposed coaxially with the central axis O3 of the auxiliary cylinder 140, and a rectangular portion that protrudes outward in the radial direction from both left and right ends of the circular portion. It has a combined shape.

The auxiliary plunger 150 includes a main body cylinder 152 extending in the front-rear direction and a sliding cylinder portion 153 provided at the front end of the main body cylinder 152, and is accommodated in the auxiliary cylinder 140 so as to be movable rearward. ing. At the rear end portion of the main body cylinder 152, an operation portion 151 is formed which has a larger diameter than the main body cylinder 152 and protrudes rearward.
On the outer peripheral surface of the main body cylinder 152, two lateral protrusion ribs 152a are formed on both sides sandwiching the central axis O3 of the auxiliary cylinder 140 in the radial direction. The lateral protrusion rib 152a extends in the front-rear direction. The lateral protrusion rib 152a passes through the rectangular portion of the through-hole 142a in the front-rear direction as the auxiliary plunger 150 moves back and forth with respect to the auxiliary cylinder 140.

  The auxiliary plunger 150 is accommodated in the auxiliary cylinder 140 so as to be rotatable around the central axis O3. With the auxiliary plunger 150 moved rearward with respect to the auxiliary cylinder 140, the auxiliary plunger 150 is rotated around the central axis O3 with respect to the auxiliary cylinder 140 in a state where the lateral protrusion rib 152a is positioned behind the lid 142, The lateral projecting ribs 152a and the through holes 142a are configured such that the lateral projecting ribs 152a are locked to the rear end surface of the lid body 142 by changing the positions of the rectangular portions around the relative central axis O3. Yes.

The inside of the main body cylinder 152 is open to the outside, and air flow from the inside of the auxiliary cylinder 140 to the inside of the main body cylinder 152 is allowed in the front end portion of the main body cylinder 152, while the auxiliary cylinder 140 from the inside of the main body cylinder 152 is allowed. A check valve body 154 for restricting the flow of air into the inside is disposed.
The sliding cylinder portion 153 is fitted on the front end portion of the main body cylinder 152. A fourth lip portion 153 a that protrudes rearward is formed on the outer end portion in the radial direction of the sliding cylinder portion 153. The fourth lip portion 153a extends over the entire circumference in the circumferential direction. The fourth lip portion 153a slides densely in the front-rear direction on the inner peripheral surface of the auxiliary cylinder cylinder 141.

Further, the trigger type liquid ejector 1 of the present embodiment includes a portion located in front of the negative pressure plunger 93 in the negative pressure cylinder 94, a portion located between the auxiliary cylinder 140 and the auxiliary plunger 150, The communication path 160 which connects is provided.
As shown in FIG. 3, the communication path 160 includes an auxiliary communication path 163 that integrally penetrates the closing wall 141 a of the auxiliary cylinder 140 and the outer cylinder 12 of the vertical supply cylinder portion 10 in the front-rear direction, and a negative pressure flange of the negative pressure cylinder 94. 130 and the negative pressure communication passage 161 integrally penetrating the outer cylinder 12 of the vertical supply cylinder portion 10 in the front-rear direction, and an auxiliary communication passage 163 formed between the inner peripheral surface of the outer cylinder 12 and the outer peripheral surface of the inner cylinder 13. And a groove 162 communicating with the negative pressure communication passage 161.

The auxiliary communication path 163 is formed at the upper end of the closing wall 141a of the auxiliary cylinder 140. The negative pressure communication passage 161 is formed at the lower end of the negative pressure flange 130 of the negative pressure cylinder 94. The cross-sectional area of the groove 162 is narrower than the cross-sectional areas of the negative pressure communication path 161 and the auxiliary communication path 163.
In the inner cylinder 13, the groove 162 and the collection passage 117 are formed at positions separated from each other in the circumferential direction. Therefore, the communication passage 160 and the recovery passage 117 are independent passages, and contents or air does not go back and forth between these passages.

(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 is supplied to the supply hole 95a through the connection cylinder portion 30 to push up the storage valve 32 to open it. Thereby, the liquid can be introduced into the storage cylinder 90. 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 front end surface of the blocking wall 111 from the rear end surface of the valve base 118.

  Accordingly, the liquid can be guided to the ejection hole 4 through the communication hole 104, the injection cylinder portion 11, 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 is moved backward. Can be moved toward.

  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 negative pressure plunger 93 formed integrally with the storage plunger 91 in the storage cylinder 90 moves rearward, so that the sealed space S6 in the negative pressure cylinder 94 is negative pressure. become. Thereby, the urging | biasing force toward the front can be made to act 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 storage valve 32 is closed. At this time, due to the negative pressure in the sealed space S6 in the negative pressure cylinder 94, the storage plunger 91 and the negative pressure plunger 93 integrally move forward toward the most advanced position and return to the original position.

  Thereby, the liquid accumulated in the storage cylinder 90 can be guided to the ejection hole 4 through the communication hole 104, the injection cylinder portion 11, and the flow passage 102, and the liquid can be ejected forward through the ejection hole 4.

Next, the case where the liquid stored in the storage cylinder 90 is continuously ejected from the ejection hole 4 will be described.
First, as shown in FIG. 5, the main body cylinder 152 is attached to the lid body 142 by operating the operation portion 151 so that the positions of the side portions of the rectangular portions of the lateral protrusion ribs 152 a and the through holes 142 a around the central axis O <b> 3 are aligned. On the other hand, when it is moved rearward, the lateral ribs 152a of the main body cylinder 152 pass through the rectangular portion of the through hole 142a while the fourth lip 153a is in sliding contact with the inner peripheral surface of the auxiliary cylinder cylinder 141.
Then, by rotating the auxiliary plunger 150 around the central axis O <b> 3 with respect to the auxiliary cylinder 140, the lateral protrusion rib 152 a is locked to the rear end surface of the lid body 142.

Thereby, as shown in FIG. 5, a space portion S <b> 5 in which a negative pressure is generated can be formed between the auxiliary cylinder 140 and the auxiliary plunger 150. Therefore, the negative pressure in the space S5 can be applied to the sealed space S6 in the negative pressure cylinder 94 through the communication path 160 as shown in FIG.
Therefore, even if outside air has entered the sealed space S6, the outside air can be exhausted to reduce the pressure in the sealed space S6. Therefore, when the storage plunger 91 moves rearward, the sealed space S6 can be reliably brought into a negative pressure state.

Next, as in the case of the normal ejection described above, when the trigger portion 51 is pulled backward and the liquid is introduced into the storage cylinder 90, the storage plunger 91 and the negative pressure plunger 93 are moved forward most as shown in FIG. The liquid can be ejected forward from the ejection hole 4 while being retracted integrally from the position.
Since the storage plunger 91 and the negative pressure plunger 93 can be moved rearward, the liquid can be gradually stored in the storage cylinder 90 using the space S4.

  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. At this time, as described above, since the sealed space S6 in the negative pressure cylinder 94 becomes negative pressure, a biasing force directed forward can be applied to the negative pressure plunger 93 and the storage plunger 91.

Thereafter, when the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the supply of liquid from the connecting cylinder portion 30 into the storage cylinder 90 stops, but the negative pressure in the negative pressure cylinder 94 causes a negative pressure. The plunger 93 and the storage plunger 91 begin to move forward together toward the most advanced position. 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 continuously ejected forward through the ejection hole 4.
In addition, since the space volume in the injection cylinder part 11 is small by the insertion part 201, the pressure in the injection cylinder part 11 can be raised rapidly, and a liquid can be injected with a high injection pressure.

Further, since the storage plunger 91 directly closes the communication hole 104, no liquid is 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.

Note that when the storage plunger 91 moves forward, unless the operation of pulling the trigger portion 51 again is performed, the storage plunger 91 moves to the most advanced position, but the operation of pulling the trigger portion 51 may be repeated before that.
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.

  As shown in FIG. 3, the first lip portion 124 is positioned on the communication groove 115 in the state where the storage plunger 91 is positioned at the last retracted position. At this time, the inside of the front cylinder portion 112 communicates with the recovery hole 116 through the communication groove 115, and the inside of the storage cylinder 90 and the inside of the container body A communicate with each other through the recovery hole 116 and the recovery passageway 117.

  As described above, according to the trigger type liquid ejector 1 of the present embodiment, liquid is ejected not only when the trigger part 51 is pulled backward but also when the trigger part 51 is not operated. The liquid can be continuously jetted.

In particular, since the auxiliary space 150 can be used to depressurize the sealed space S6 in the negative pressure cylinder 94 before the continuous injection, the storage plunger 91 is moved from the beginning to the end in the process of continuously injecting liquid. It can suppress that the thrust to provide falls. Therefore, it is possible to stabilize the liquid ejection state and to improve the liquid running out.
At this time, it is possible to prevent an increase in the weight of the storage plunger 91 due to the provision of the auxiliary cylinder 140 and the auxiliary plunger 150, and the storage plunger 91 can be smoothly moved in the front-rear direction. Thereby, the stability of the injection state mentioned above and favorable liquid running out can be implement | achieved reliably.
Further, it is possible to suppress bulkiness in the vertical direction and radial direction of the trigger type liquid ejector due to the provision of the auxiliary cylinder 140 and the auxiliary plunger 150.

  Further, since the pressure receiving area of the negative pressure plunger 93 is larger than the pressure receiving area of the storage plunger 91, a negative pressure is generated in the negative pressure cylinder 94 that can reliably push out the liquid stored in the storage cylinder 90. Easy to do. Therefore, a large driving force can be applied to the storage plunger 91 and the negative pressure plunger 93. Therefore, the storage plunger 91 and the negative pressure plunger 93 are smoothly restored and moved forward, so that the liquid can be stably and continuously ejected from the ejection hole 4.

Further, since the storage plunger 91 and the negative pressure plunger 93 are integrally restored and moved using the negative pressure generated in the negative pressure cylinder 94, for example, an urging member using a metal part such as a coil spring is used. In contrast, it is possible to suppress an extra load (load) from acting on each component other than during operation (at the time of liquid ejection). Therefore, for example, it is possible to suppress the occurrence of liquid leakage due to cracks or elongation in each component.
Furthermore, when metal parts such as a coil spring are used, the environmental load is large at the time of disposal and the cost is likely to increase. On the other hand, in this embodiment using a negative pressure, for example, since it can be composed of a single material made only of resin, the load on the environment is small and the cost can be suppressed.

Further, when the liquid in the storage cylinder 90 is ejected from the ejection hole 4, the outflow of the liquid from the storage cylinder 90 into the connecting cylinder portion 30 can be restricted by the storage valve 32. Therefore, for example, it becomes possible to easily increase the pressure of the liquid ejected from the ejection hole 4 through the ejection cylinder portion 11, and the liquid can be ejected in a suitable form.
Moreover, since the closing plug 31 is formed integrally with the main cylinder 53, an increase in the number of parts can be suppressed.

Moreover, since the connection cylinder part 30 and the storage cylinder 90 are arrange | positioned in parallel in the up-down direction and are provided with the common partition W3, size reduction of the ejector main body 2 can be achieved.
A collection passage 117 is provided in the ejector body 2. Therefore, when the storage plunger 91 is sufficiently moved to the rear side and the liquid is further introduced into the storage cylinder 90, the liquid can be returned from the collection passage 117 into the container body A. Thereby, it can suppress that the pressure in the storage cylinder 90 becomes high too much, for example, can make it easy to prevent damage etc. of the storage cylinder 90.

  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, in the above-described embodiment, the auxiliary cylinder 140 is disposed on the opposite side of the main cylinder 53 with the vertical supply cylinder portion 10 interposed therebetween, but the present invention is not limited to this. The position of the auxiliary cylinder can be arbitrarily changed, and the central axis of the auxiliary cylinder and the central axis of the storage plunger may be arranged differently.

  Moreover, although the upper end part of the vertical supply cylinder part 10 showed the structure connected to the axial direction intermediate part of the storage cylinder 90 in the said embodiment, this invention is not limited to this. The upper end of the vertical supply cylinder may be the front end of the storage cylinder or the rear end.

  Moreover, in the said embodiment, although the storage plunger 91 showed the structure which moves back with the supply of the liquid in the storage cylinder 90, this invention is not limited to this. For example, it is also possible to employ a configuration in which the storage plunger moves forward as the liquid is supplied into the storage cylinder. Furthermore, it is also possible to adopt a configuration in which the central axis of the storage cylinder extends in a direction different from the front-rear direction, and the storage plunger moves in an axial direction (a direction different from the front-rear direction) along the central axis.

  Moreover, in the said embodiment, although the structure which made the trigger part 51 rock | fluctuate back was shown, this invention is not restricted to this. It is possible to appropriately adopt a form in which the trigger portion moves backward. For example, the trigger unit may be slidable rearward.

  In each of the above embodiments, a mechanism for locking the operation of the trigger portion or a switching member for switching the liquid ejection form (for example, mist, foam, etc.) in front of the ejection hole may be further provided.

  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.

DESCRIPTION OF SYMBOLS 1 Trigger type liquid ejector 2 Ejector main body 3 Nozzle member 4 Ejection hole 10 Vertical supply cylinder part 11 Injection cylinder part 30 Connection cylinder part 50 Trigger mechanism 51 Trigger part 52 Main piston 53 Main cylinder 90 Storage cylinder 91 Storage plunger 93 Negative pressure Plunger 94 Negative pressure cylinder 140 Auxiliary cylinder 150 Auxiliary plunger 160 Communication path A Container body

Claims (3)

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 disposed in front of the vertical supply cylinder part and guiding the liquid in the vertical supply cylinder part to the ejection holes;
There is a trigger part disposed in front of the vertical supply cylinder part so as to be movable rearward in a forward-biased state, and liquid is moved from the vertical supply cylinder part into the injection cylinder part by the rearward movement of the trigger part. A trigger type liquid ejector comprising a trigger mechanism that circulates to the ejection hole side through,
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
The storage cylinder is movably disposed in an axial direction along a central axis thereof, and moves toward one side of the axial direction along with the supply of the liquid into the storage cylinder. A storage plunger with the other end opening closed;
A negative pressure plunger connected to the storage plunger and linked to the axial movement of the storage plunger;
A negative pressure cylinder extending along the axial direction, the other end opening in the axial direction being closed, and the negative pressure plunger being housed therein movably toward one side in the axial direction;
An auxiliary cylinder disposed independently of the storage plunger;
An auxiliary plunger disposed on the inner side of the auxiliary cylinder so as to be movable in the axial direction along the central axis thereof;
A communication path that communicates a portion of the negative pressure cylinder that is positioned on the other side in the axial direction with respect to the negative pressure plunger and a portion that is positioned between the auxiliary cylinder and the auxiliary plunger; ,
The auxiliary cylinder is closed at one end opening in the axial direction,
The trigger type liquid ejector, wherein the auxiliary plunger is accommodated in the auxiliary cylinder so as to be movable toward the other side in the axial direction. The trigger mechanism is
A main piston that moves in the front-rear direction in conjunction with the movement of the trigger portion;
A main cylinder that is pressurized and depressurized in accordance with the movement of the main piston, and the inside communicates with the vertical supply cylinder portion;
2. The trigger type liquid ejector according to claim 1, wherein the auxiliary cylinder is disposed on an opposite side of the main cylinder across the vertical supply cylinder portion. An upper end portion of the vertical supply cylinder portion is connected to an intermediate portion in the axial direction of the storage cylinder,
The main cylinder is disposed below a portion of the storage cylinder that protrudes to the other side in the axial direction from the vertical supply cylinder, and the auxiliary cylinder is positioned below the portion that protrudes to the one side in the axial direction. The trigger type liquid ejector according to claim 2, wherein the trigger type liquid ejector is disposed.

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