JP6546861B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector.

There is known a trigger-type liquid ejector which sucks up liquid from the container body and discharges it from the nozzle by the operation of a trigger portion extending downward of the nozzle (for example, Patent Document 1 below).
In the conventional trigger type liquid sprayer, the injection cylinder part extended toward the front is provided in the upper part of the vertical supply cylinder part in communication with a container body. A nozzle is attached to the tip end side of the injection cylinder. A cylinder that operates by the operation of the trigger unit is disposed below the injection cylinder. Then, by operating the trigger unit, the liquid can be sucked from the vertical supply cylinder into the cylinder, and the liquid can be jetted forward from the injection cylinder through the nozzle.

Patent No. 378 1 904

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

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a trigger-type liquid ejector capable of continuous injection of liquid.

(1) The trigger type liquid ejector according to the present invention includes an ejector main body mounted on a container body containing a liquid, and an ejector provided on the front side of the ejector main body and ejecting liquid forward. And a nozzle member having a hole formed therein, wherein the sprayer body extends in the vertical direction, and is disposed in front of the vertical supply cylindrical portion and a vertical supply cylindrical portion that sucks up the liquid in the container body. An injection cylinder unit for guiding liquid in the vertical supply cylinder unit to the ejection hole; and a trigger unit disposed in front of the vertical supply cylinder unit so as to be movable rearward in a forward biased state, the trigger unit A trigger mechanism for causing liquid to flow from the inside of the vertical supply cylinder part through the inside of the injection cylinder part toward the ejection hole side by the backward movement of the trigger type liquid ejector, and to the rear of the trigger part Through the vertical feed cylinder by A storage cylinder to which a body is internally supplied, and an movably disposed in the storage cylinder in an axial direction along a central axis of the storage cylinder, and one side of the axial direction along with the supply of liquid into the storage cylinder. , And 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 and closing the other end opening in the axial direction, in which the negative pressure plunger is accommodated movably toward one side in the axial direction, and in the storage plunger An operating member slidably movable in the axial direction and closely fitted to the storage plunger, and a position on the other side in the axial direction with respect to the negative pressure plunger in the negative pressure cylinder A portion that, characterized in that it comprises a communication passage communicating with the portion located, the between the operating member and the reservoir plunger.

According to the present invention, when the trigger unit is pulled backward with the liquid attached to the container containing the liquid, the liquid in the container is sucked up and introduced into the vertical supply cylinder, and the inside of the vertical supply cylinder is The liquid which has passed is jetted from the jet hole through the inside of the injection cylinder. At the same time, the liquid that has passed through the vertical feed 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 accordingly. At this time, in the negative pressure cylinder, a portion located on the other side in the axial direction with respect to the negative pressure plunger is a closed space. Therefore, when the negative pressure plunger moves to one side in the axial direction, the enclosed space becomes negative pressure. Thereby, it is possible to generate a biasing force directed to the other side in the axial direction with respect to the negative pressure plunger and the storage plunger.
As described above, each time the trigger portion is pulled, the storage plunger can be moved to one side in the axial direction while the liquid is jetted from the ejection holes, and the liquid can be stored (filled) in the storage cylinder.

Then, when the operation of pulling the trigger part is stopped, the supply of the liquid into the vertical supply cylinder part is stopped, but the negative pressure plunger and the storage plunger are integrated toward the other side in the axial direction by the negative pressure in the negative pressure cylinder. Start moving back to. As a result, the liquid filled in the storage cylinder can be pushed out from the inside of the storage cylinder toward the ejection port, and can be continuously ejected from the ejection port.
Therefore, the liquid can be ejected not only when the operation to pull the trigger part backward but also when the trigger part is not operated, and the liquid can be continuously ejected.

  When the storage plunger moves back to the other side in the axial direction, the storage plunger moves to the other axial end of the storage cylinder unless the trigger part is pulled again, but the operation to pull the trigger part in front of that Can be repeated. In this case, the storage plunger repeats the movement to one side in the axial direction and the movement to the other side with a substantially constant width, and as a whole, moves gradually to one side in the axial direction. Therefore, even in this case, the liquid can be gradually accumulated in the storage cylinder.

  By the way, since the negative pressure in the negative pressure cylinder is used when the negative pressure plunger and the storage plunger are moved back and forth, for example, the negative pressure may be used without using the biasing force from other members such as the biasing member. The plunger and the storage plunger can be moved back. Thereby, a thrust can be provided to a negative pressure plunger and a storage plunger, achieving simplification of a structure.

In particular, by moving the operation member to one side in the axial direction with respect to the storage plunger in advance before continuous injection, a portion of the negative pressure cylinder located on the other side in the axial direction with respect to the negative pressure plunger ( The enclosed space can be depressurized through the communication passage. Thereby, when the negative pressure plunger moves to one side in the axial direction, the sealed space can be reliably brought into a negative pressure state.
Therefore, it is possible to suppress a decrease in thrust applied to the storage plunger from the beginning to the end in the process of continuously injecting the liquid after storing the liquid in the storage cylinder. Therefore, it is possible to stabilize the ejection state of the liquid and to improve the liquid drainage.

(2) The pressure receiving area of the negative pressure plunger may be larger than the pressure receiving area of the operation member.

In this case, the pressure receiving area of the negative pressure plunger is set larger than the pressure receiving area of the operation member fitted in the tubular storage plunger. Therefore, even if the operating member is moved to one side in the axial direction with respect to the storage plunger before continuous injection is performed and the portion positioned between the operating member and the storage plunger is decompressed, the negative effect is caused by the decompression. It is possible to prevent the pressure plunger from moving in a row on one side in the axial direction with respect to the negative pressure cylinder. Therefore, it is possible to prevent the storage plunger from moving together with the negative pressure plunger before operating the trigger portion.
The pressure receiving area of the negative pressure plunger may be set larger than the pressure receiving area of the storage plunger. In this case, it is easy to generate a negative pressure to the extent that the liquid stored in the storage cylinder can be reliably pushed out in the negative pressure cylinder, so a large propulsive force is applied to the negative pressure plunger and the storage plunger. it can. Therefore, the negative pressure plunger and the storage plunger are smoothly returned and moved, and it is easy to stably and continuously eject the liquid from the ejection holes.

(3) The storage plunger is formed with a lip portion slidingly in close contact with the inner circumferential surface of the storage cylinder, and the communication passage is one side of the storage plunger in the axial direction from the lip portion. And a portion of the negative pressure cylinder located on the other side in the axial direction with respect to the negative pressure plunger through a communication hole formed to penetrate the storage plunger, A portion located between the storage plunger and the operation member may be in communication.

  In this case, since the communication hole is located on one side in the axial direction with respect to the lip portion, communication between the inside of the storage plunger and the ejection hole can be appropriately prevented by the lip portion. On the other hand, when the operating member is moved to one side in the axial direction with respect to the storage plunger, the negative pressure generated between the storage plunger and the operating member is transferred to the negative pressure plunger through the communication hole and the communication passage. It can be efficiently applied to the enclosed space.

(4) The operation member is fitted in the storage plunger so as to be rotatable about the central axis, and has a protrusion projecting to one side in the axial direction with respect to the storage plunger, and the negative pressure The operating member is fixed to a cylinder and surrounds the projecting portion from the outside, and the operating member is stored on the inner peripheral surface of the surrounding cylinder along with the rotational movement of the operating member about the central axis. A guide surface may be formed to slide the guided protrusion formed on the protrusion so as to move the plunger toward one side in the axial direction.

  In this case, the operating member can be moved toward one side in the axial direction with respect to the storage plunger by rotating the operating member about the central axis. Therefore, since the operation member can be moved with respect to the storage plunger by using the rotation operation as compared with the case in which the operation member is simply moved with respect to the storage plunger, it is possible to provide good operability.

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

It is a longitudinal cross-sectional view which shows 1st Embodiment of the trigger type liquid ejector which concerns on this invention. It is the longitudinal cross-sectional view which expanded the periphery of the ejector main body in the trigger type liquid ejector shown in FIG. It is the longitudinal cross-sectional view which expanded the periphery of the nozzle member in the trigger type liquid ejector shown in FIG. It is the rear view which looked at the knob part of the operation member shown in FIG. 1 from the back side. It is a longitudinal cross-sectional view which shows the state which rotated the operation member shown in FIG. 1 around the central axis. It is a longitudinal cross-sectional view which shows the state which pulls a trigger part back from the state shown in FIG. 1, and is performing normally spouting. It is a longitudinal cross-sectional view which shows the state which pulls a trigger part back from the state shown in FIG. 5, and is performing the continuous jet-out. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the trigger type liquid ejector which concerns on this invention. FIG. 9 is an enlarged vertical cross-sectional view of the periphery of a nozzle member in the trigger type liquid jet device shown in FIG. 8, showing a rotating member of the operating member rotated about a central axis; It is a side view of the support member shown in FIG. It is the rear view which looked at the support member shown in FIG. 10 from the back side. It is a longitudinal cross-sectional view which shows the state which pulls a trigger part back from the state shown in FIG. 9, and is performing the continuous jet-out. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the trigger type liquid ejector which concerns on this invention. It is the rear view which looked at the control lever shown in FIG. 13 from the back side. It is the longitudinal cross-sectional view which expanded the periphery of the nozzle member in the trigger type liquid ejector shown in FIG. 13, Comprising: It is a figure which shows the state which pulled up the control lever and was operated. It is a longitudinal cross-sectional view which shows the state which pulls a trigger part back from the state shown in FIG. 15, and is performing the continuous jet-out. It is a longitudinal cross-sectional view which shows 4th Embodiment of the trigger type liquid ejector which concerns on this invention. It is the longitudinal cross-sectional view which expanded the periphery of the vertical supply cylinder part in the trigger type liquid ejector shown in FIG. It is the longitudinal cross-sectional view which expanded the periphery of the operation member in the trigger type liquid ejector shown in FIG. FIG. 20 is a longitudinal sectional view showing a state in which the operating member is moved rearward from the state shown in FIG. 19 and then rotated about a central axis. It is a longitudinal cross-sectional view which shows the state which pulls a trigger part back side from the state shown in FIG. 20, and is performing continuous jet-out. It is the longitudinal cross-sectional view which expanded the periphery of the front-end | tip part of the storage plunger in the state shown in FIG. It is a figure which shows 5th Embodiment of the trigger type liquid ejector which concerns on this invention, Comprising: It is the longitudinal cross-sectional view which expanded the periphery of the operation member. It is a longitudinal cross-sectional view which shows the state which moved the operation member to the front from the state shown in FIG.

First Embodiment
Hereinafter, a first embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the trigger type liquid ejector 1 of the present embodiment is mounted on a container A for containing liquid, and has an ejector main body 2 having a vertical supply cylindrical portion 10 for sucking up the liquid, and an ejection hole 4. And a nozzle member 3 mounted on the jet body 2.
Each configuration of the trigger type liquid jet device 1 is a molded product using a synthetic resin unless otherwise specified.

  In the present embodiment, the central axis of the vertical supply tube portion 10 is taken as an axis O1, the container body A side along the axis O1 is referred to as the lower side, the opposite side is referred to as the upper, and the direction along the axis O1 is referred to as the vertical direction. Further, in plan view viewed from the up and down direction, one direction orthogonal to the axis O1 is referred to as the front and back direction, and a direction orthogonal to both the up and down direction and the front and back direction is referred to as the left and right direction.

As shown in FIGS. 1 and 2, the jet body 2 is vertically extended from the vertical supply cylindrical portion 10 extending in the vertical direction, and extends from the vertical supply cylindrical portion 10 along the longitudinal direction, and the inner side is the vertical supply cylindrical portion And an injection cylinder portion 11 communicated with the inside of the housing 10, and is formed in an L shape in a side view as viewed from the left and right direction.
In the front-rear direction, the direction in which the injection cylinder 11 extends from the vertical supply cylinder 10 is referred to as the front or front, and the opposite direction is referred to as the rear or the rear.

The vertical supply cylindrical portion 10 includes an upper cylindrical outer cylinder 12 and an inner cylinder 13 fitted in the outer cylinder 12.
The outer cylinder 12 is disposed above the large diameter portion 12a and the large diameter portion 12a and has a small diameter portion 12b smaller in diameter than 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. And a flange portion 12c for connecting the two-step cylinder, and is formed in a two-stage cylindrical shape whose diameter is reduced from the lower side to the upper side. In the small diameter portion 12b, the top opening is closed by the top wall 12d.

  The inner cylinder 13 has a large diameter portion 13a, a small diameter portion 13b disposed above the large diameter portion 13a, and a smaller diameter than 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. And a flange portion 13c for connecting the two-step cylinder, and is formed in a two-stage cylindrical shape whose diameter is reduced from the lower side to the upper side.

In the small diameter portion 13b of the inner cylinder 13, the upper portion of the pipe 15 which is disposed in the container body A and whose lower end opening is positioned at the bottom portion (not shown) of the container body A is fitted. The flange portion 13 c of the inner cylinder 13 is located below the flange portion 12 c of the outer cylinder 12 in a state in which the clearance S 1 is secured between the flange portion 13 c and the flange portion 12 c of the outer cylinder 12.
In the portion of the large diameter portion 13a of the inner cylinder 13 that protrudes downward from the large diameter portion 12a of the outer cylinder 12, an annular collar 13d that protrudes outward in the radial direction is formed. The collar portion 13d is disposed in the upper end portion of the mounting cap 14 mounted (for example, screwed) to the mouth portion A1 of the container body A, and rotatably locks the upper end portion of the mounting cap 14 around its axis. The collar 13 d is vertically sandwiched by the mounting cap 14 and the upper end opening edge of the opening A 1 of the container A.
In addition, the axis line O1 of the vertical supply cylindrical portion 10 constituted by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear with respect to the container axis of the container body A.

  The injection cylinder 11 is disposed in front of the vertical supply cylinder 10, and its rear end is connected to the front of the upper end of the vertical supply cylinder 10. The inside of the injection cylinder 11 communicates with the inside of the vertical supply cylinder 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.

Disposed inside the upper end portion of the inner cylinder 13 is a discharge valve 30 which is elastically deformable in the vertical direction.
The discharge valve 30 is fitted in the inner cylinder 13 and is disposed below the base portion 31 that abuts on the lower surface of the top wall portion 12 d of the outer cylinder 12 and the base portion 31. And a hollow spring portion 34 connecting the base portion 31 and the valve body 33 up and down.

The valve body 33 is pressed from above by the hollow spring portion 34 and is, for example, in close contact with the valve seat 32. Thereby, the valve body 33 shuts off the 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 biasing force of the hollow spring portion 34 and is separated from the valve seat 32, whereby a space located above the valve seat 32 in the inner cylinder 13 and the valve seat 32. It also communicates with the space located below.

An annular tapered cylindrical portion 35 protruding inward is formed at a portion of the inner peripheral surface of the inner cylinder 13 located below the valve seat 32 and above the upper end of the pipe 15. There is.
The tapered cylindrical portion 35 gradually reduces its diameter as it goes downward. A spherical suction valve 36 is disposed on the inner side of the tapered cylindrical portion 35 so as to be separably seated on the inner circumferential surface of the tapered cylindrical portion 35. The suction valve 36 communicates and shuts off a space located above the tapered cylinder 35 and a space located below the tapered cylinder 35 in the inner cylinder 13.

In the portion of the outer cylinder 12 located below the injection cylinder portion 11, a cylinder portion 40 for cylinder projecting forward is integrally formed.
The cylinder portion 40 for the cylinder is opened forward, and is partially formed integrally with the flange portion 12 c of the outer cylinder 12.

  The ejector main body 2 extends downward from the injection cylinder 11 and is provided with a trigger 51 arranged to be pivotable (movable) rearward in a forward biasing state forward of the vertical supply cylinder 10, and a trigger A main piston 52 that moves in the front-rear direction in conjunction with the rocking of 51, a main cylinder 53 that pressurizes and depressurizes the inside with the movement of the main piston 52, and an elastic plate portion that urges the trigger portion 51 forward. A cover 55 is further provided which covers the whole of the vertical supply cylindrical portion 10, the injection cylindrical portion 11, the storage cylinder 90 and the negative pressure cylinder 94 described later at least from the upper side and the left and right direction.

  The discharge valve 30, the suction valve 36, the trigger unit 51, the main piston 52, the main cylinder 53, and the elastic plate unit 54 described above eject liquid from the inside of the vertical supply cylinder unit 10 by the rearward swing of the trigger unit 51. The trigger mechanism 50 is configured to be introduced into the portion 11 and to be ejected from the inside of the injection cylinder portion 11 to the ejection hole 4 side.

  The main cylinder 53 is provided with an outer cylindrical portion 60 opening forward, a rear wall 61 closing a rear opening of the outer cylindrical portion 60, and a front portion projecting from a central portion of the rear wall 61. And a top end cylindrical piston guide 62 closed at the front end.

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

  The outer cylinder portion 60 is formed with a first air hole 63 communicating the inside of the outer cylinder portion 60 with the gap S2. A second vent hole 64 communicating the above-mentioned gap S2 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 in the flange portion 12c of the outer cylinder 12 Is formed. Furthermore, in the flange portion 13 c of the inner cylinder 13, a third vent 65 is formed to communicate the gap S 1 with the inside of the large diameter portion 13 a of the inner cylinder 13 and the mounting cap 14.

  In the rear wall portion 61 of the main cylinder 53, a first through hole 66 penetrating the outer cylinder 12 and the main cylinder 53 in the front-rear direction is formed in a portion located above the piston guide 62. In the illustrated example, a cylindrical portion protruding rearward is formed at the opening peripheral edge of the first through hole 66 in the rear wall 61, and this cylindrical portion is formed in the small diameter portion 12 b of the outer cylinder 12. It is fitted in 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.
Thus, 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 between the communication between the inside of the injection cylinder 11 and the inside of the main cylinder 53 and the shut-off thereof, and the suction valve 36 switches the communication between the inside of the container A and the inside of the main cylinder 53 and the shut-off thereof.

The main piston 52 includes a cylindrical connecting portion 70 connected to the trigger portion 51, and a piston cylinder 71 located rearward of the connecting portion 70 and larger in diameter than the connecting portion 70, and as a whole It is formed in the shape of a cylinder opened to the rear.
The main cylinder 53 and the main piston 52 are disposed on a common axial line (not shown) extending along the front-rear direction.

  The piston cylinder 71 is opened rearward and has a piston main body 72 into which the piston guide 62 is inserted, and the rear end of the piston main body 72 protrudes radially outward from the rear end, and an outer cylinder For example, the inner peripheral surface of the portion 60 is provided with a sliding cylindrical portion 73 which is in sliding contact with the inner peripheral surface.

The piston body portion 72 is formed to have an inner diameter larger than the outer diameter of the piston guide 62. In the illustrated example, a slight gap is provided 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 in which the diameter gradually increases toward the front and the rear from the center portion in the front and rear direction, and the lip portions 73 a located at both end portions in the front and rear direction It is in sliding contact with it.

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

  In addition, when the trigger portion 51 is in the foremost pivoting position (the foremost moving position), the sliding cylindrical portion 73 of the main piston 52 closes the first air hole 63. Then, when the main piston 52 is moved backward by a predetermined amount due to the rearward swing of the trigger portion 51, the sliding cylindrical portion 73 opens the first air hole 63. Thereby, the inside of the container body A communicates with the outside through the third vent hole 65, the second vent hole 64 and the first vent hole 63.

  The trigger portion 51 has a main plate member 80 having a front surface that curves in a concave shape toward the rear in a side view viewed from the left and right direction, and a pair of side plate members 81 standing backward from the left and right side edge portions of the main plate member 80. And have.

  At upper end portions of the pair of side plate members 81, a pair of connection plates 82 extending upward to the side of the injection cylinder 11 and sandwiching the injection cylinder 11 from the left and right direction are formed. A rotary shaft portion 83 is provided to protrude outward in the left-right direction on the pair of connection plates 82. The rotary shaft portion 83 is rotatably supported by a bearing portion provided on the upper plate member 84 covering the upper side of the injection cylinder portion 11. Thereby, the trigger part 51 is made rockable | fluctuatable in the front-back direction centering on the rotating shaft part 83. As shown in FIG.

In the trigger portion 51, an opening 51a penetrating the main plate member 80 in the front-rear direction is formed, and a connecting cylinder 85 is formed so as to extend rearward from the peripheral edge of the opening 51a.
At a portion of the inner peripheral surface of the connecting cylinder 85 located on the rear side, a pair of connecting shafts 86 that project in the left-right direction toward the inside of the connecting cylinder 85 are formed. The connection shafts 86 are inserted into connection holes formed in the connection 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 rotatable about its axis with respect to the connecting shaft 86, and is connected so as to be movable by a predetermined amount in the vertical direction. Thus, the main piston 52 is movable back and forth in accordance with the rocking of the trigger portion 51 in the front and back direction.

The upper plate member 84 in the form of a horizontal plate connected to the top wall 12 d of the outer cylinder 12 in the vertical supply cylinder 10 is attached to the upper surface of the injection cylinder 11.
On the left and right sides of the upper plate member 84, the above-mentioned elastic plate portions 54 which are formed in the shape of a circular arc convex forward in a side view seen from the left and right direction and extend to the lower side of the injection cylinder 11 are integrally formed There is. The elastic plate portion 54 is formed in an arc shape concentric with each other in a side view as viewed from the left and right direction, and includes a pair of plate springs arranged in the front and back direction.

Of the pair of plate springs, a plate spring positioned on the front side is a main plate spring 54a, and a plate spring positioned on the rear side is a sub plate spring 54b.
Lower end portions of the main plate spring 54a and the sub plate spring 54b are integrally connected via an arc-shaped folded portion 54c. In the folded back portion 54c, a locking piece 54d protrudes downward, and the locking piece 54d is inserted from above into and engaged with a pocket portion 81a formed on the side plate member 81 in the trigger portion 51. ing.
Thus, the elastic plate portion 54 biases the trigger portion 51 forward via the locking piece 54d and the pocket portion 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 145 described later from behind by the urging of the elastic plate portion 54. Thereby, the trigger part 51 is positioned at the forwardmost swinging position.
When the trigger portion 51 is pulled backward from the foremost swinging position, the elastic plate portion 54 elastically deforms so as to move the folded back portion 54 c backward via the locking piece 54 d. At this time, in the elastic plate portion 54, the sub plate spring 54b is elastically deformed to a larger extent than the main plate spring 54a.

  In addition, even if the locking piece 54d is pulled out from the pocket 81a even when the trigger 51 is pulled backward, the trigger 51 reaches the rearmost pivoting position (rearward moving position) while being pulled upward. The engagement state with the pocket portion 81a is maintained.

As shown in FIGS. 1 and 3, the nozzle member 3 is mainly disposed on the front side and the upper side of the jet body 2.
The nozzle member 3 has an axial direction along the central axis O2 in the storage cylinder 90 and the storage cylinder 90 in which the liquid having passed through the inside of the vertical supply cylindrical portion 10 is supplied to the inside by the rearward swing of the trigger portion 51. The storage plunger 91 is disposed so as to be freely movable and moves toward one side in the axial direction with the supply of the liquid into the storage cylinder 90, and is connected to the storage plunger 91, and the storage plunger 91 is A negative pressure plunger 93 which moves along with the axial movement (cooperating), and a negative electrode which extends along the axial direction and in which the negative pressure plunger 93 is movably accommodated toward one side in the axial direction. And a pressure cylinder 94.

In the illustrated example, the central axis O2 of the storage cylinder 90 extends in the front-rear direction. Therefore, the storage plunger 91 and the negative pressure plunger 93 are arranged to move rearward (one side in the axial direction) with the supply of the liquid into the storage cylinder 90.
In addition, you may employ | adopt the structure by which the storage cylinder 90, the storage plunger 91, the negative pressure plunger 93, and the negative pressure cylinder 94 were equipped with the ejector main body 2. FIG.

  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. The storage cylinder 90 and the negative pressure cylinder 94 are both disposed above the injection cylinder 11 and extend in the front-rear direction. Therefore, the storage cylinder 90 and the negative pressure cylinder 94 are disposed in parallel to the injection cylinder 11.

  The storage cylinder 90 includes a front wall 95 and a storage cylinder 96 extending rearward from the front wall 95, and is formed in a cylindrical shape that opens rearward. The storage cylinder 90 is spaced upward from the upper plate member 84 in the jet body 2, and is located forward of the vertical supply cylinder 10.

  A cylindrical nozzle shaft 100 and a surrounding cylinder 101 surrounding the nozzle shaft 100 from the outside are provided on the front wall 95 so as to project forward. The nozzle shaft portion 100 and the surrounding cylinder 101 are disposed coaxially with the central axis O2. In addition, the surrounding cylinder 101 slightly protrudes toward the front than the nozzle shaft 100.

An annular flow passage 102 is formed between the nozzle shaft portion 100 and the surrounding cylinder 101. Further, the nozzle shaft portion 100 is mounted with a cylindrical nozzle cap 103 having a spouted hole 4 opened forward, and the flow passage 102 and the spouted hole 4 are communicated. Furthermore, in the front wall portion 95, a communication hole 104 communicating with the flow passage 102 is formed.
Thus, the inside of the storage cylinder 90 is in communication with the ejection hole 4 through the communication hole 104 and the flow passage 102.

At the front end of the storage cylinder cylinder 96, a supply hole 95a communicating with the inside of the storage cylinder 90 and a flow path 143 described later is formed.
The supply hole 95a is formed in the lower portion of the front end portion of the storage cylinder 96 and penetrates this portion in the vertical direction. Thus, the supply holes 95 a indirectly communicate the inside of the vertical supply cylinder 10 with the inside of the storage cylinder 90 through the inside of the injection cylinder 11. The supply hole 95 a is located forward of the front end opening of the injection cylinder 11.

  The negative pressure cylinder 94 is disposed coaxially with the storage cylinder 90. The negative pressure cylinder 94 includes an annular closing flange 110 protruding radially outward from the outer peripheral surface of the storage cylinder 96 and a negative pressure cylinder 111 extending rearward from the closing flange 110. Have.

The closing flange 110 is disposed coaxially with the central axis O 2 and closes the front end opening of the negative pressure cylinder 111. The negative pressure cylinder 111 extends rearward from the outer peripheral edge of the closing flange 110. The rear end portion of the negative pressure cylinder cylinder 111 is located rearward of the vertical supply cylinder portion 10.
The rear end portion of the negative pressure cylinder tube 111 may be located at the same position in the front-rear direction with respect to the vertical supply cylinder portion 10 or on the front side. In these cases, it is possible to facilitate downsizing of the trigger type liquid jet device 1 in the front-rear direction. Further, at the rear end portion of the negative pressure cylinder barrel 111, a locking projection 112 is formed which protrudes outward in the radial direction.

The storage plunger 91 and the negative pressure plunger 93 are integrally formed. 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 disposed coaxially with the central axis O2.
The storage plunger 91 includes a storage main body cylinder 115 extending in the front-rear direction, and a closing wall 116 closing the front end opening of the storage main body cylinder 115.

  The storage main body cylinder 115 is formed in a two-stage cylindrical shape whose diameter is reduced stepwise from the rear to the front. An annular first lip portion (lip portion) 115 a that protrudes forward and is disposed coaxially with the central axis O 2 is formed in the step portion of the storage main body cylinder 115. The first lip portion 115 a is in sliding contact with, for example, the inner circumferential surface of the storage cylinder barrel 96.

The closed wall 116 is formed with a convex portion 117 that protrudes forward and enters the communication hole 104 formed in the front wall 95 of the storage cylinder 90 to directly close the communication hole 104. Thus, the storage plunger 91 closes the communication hole 104 in an openable manner.
A space S4 defined by the main storage cylinder 115, the storage cylinder 96, and the first lip 115a communicates with the inside of the supply hole 95a. Thereby, it is possible to store the liquid in the storage cylinder 90 using the space portion S4.

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 has a negative pressure main body cylinder 120 extending in the front-rear direction, an annular plunger wall 121 projecting radially outward from the front end portion of the negative pressure main body cylinder 120, and a rear end of the storage cylinder cylinder 96 A connection ring portion 122, which is located rearward of the opening end and connects the rear end portion of the negative pressure main body cylinder 120 and the rear end portion of the storage main body cylinder 115, is provided.

At the outer peripheral edge of the plunger wall 121, an annular second lip portion 121a is formed coaxially with the central axis O2 and projecting rearward. The second lip portion 121 a is, for example, in close sliding contact with the inner peripheral surface of the negative pressure cylinder 111 in the negative pressure cylinder 94.
On the outer peripheral surface of the front end portion of the negative pressure main cylinder 120, a plurality of locking ribs 123 projecting outward in the radial direction and extending in the front-rear direction are formed at intervals around the central axis O2. In the example of illustration, corresponding to the hollow part 133 mentioned later, the locking rib 123 is formed a pair at intervals of 180 degree around the central axis O2. The front end of the locking rib 123 is connected to the radially inner end of the plunger wall 121.

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 respective outer surfaces of the negative pressure plunger 93 and the storage plunger 91 are projected onto a projection plane orthogonal to the central axis O2, the negative pressure plunger 93 appears in an annular shape coaxial with the central axis O2 in the projection plane. The area of the shadow (the projection area of the negative pressure plunger 93) is set larger than the area of the shadow of the storage plunger 91 (the projection area of the storage plunger 91) appearing in a circular shape coaxial with the central axis O2 on the projection plane.

The projection area of the negative pressure plunger 93 is, in the above projection plane, the inner end in the radial direction of the negative pressure plunger 93 (in the illustrated example, the inner peripheral edge of the connection ring 122) and the outer end (in the illustration In an example, it is an area of a portion located between the second lip portion 121a and the outer peripheral edge).
The projected area of the storage plunger 91 is the area of a portion located on the inside of the radial outer end (the outer peripheral edge of the first lip portion 115a in the illustrated example) of the storage plunger 91 on the projection plane.

Furthermore, in the present embodiment, the pressure receiving area of the negative pressure plunger 93 is set to be larger than the pressure receiving area of the operation member 150 described later.
The operation member 150 is slidable in the front-rear direction in the storage plunger 91 and closely fitted to the storage plunger 91. Therefore, the projection area of the operation member 150 corresponds to the projection area in the storage plunger 91, and more specifically, the inside of the portion of the storage main body cylinder 115 formed in a two-stage cylindrical shape on the projection plane. It is a part located in

The nozzle member 3 further includes a mounting cylinder 130 mounted at the rear end of the negative pressure cylinder 94.
The mounting cylinder 130 is fitted to the inside of the negative pressure cylinder cylinder 111 from the rear, and a surrounding cylinder part 131 surrounding a protrusion 153 of the operation member 150 described later from the outside, and the rear of the negative pressure cylinder cylinder 111 And is formed into a double cylinder shape including a fitting cylindrical portion 132 externally fitted from the above.

The fitting cylindrical portion 132 is locked from the front with respect to the locking projection 112 formed on the negative pressure cylinder 111. Thereby, the mounting cylinder 130 is mounted on the negative pressure cylinder cylinder 111 in a state of being prevented from coming off rearward.
The diameter of the rear end portion of the surrounding cylindrical portion 131 is larger than that of the other portion, and the enlarged diameter portion is fitted to the inside of the negative pressure cylinder cylinder 111. Therefore, in the illustrated example, an annular gap is formed between the negative pressure cylinder cylinder 111 and a portion of the surrounding cylinder part 131 located forward of the rear end side.

The surrounding cylindrical portion 131 extends forward so as to surround the rear end portions of the storage plunger 91 and the negative pressure plunger 93 from the outside. That is, the rear end portions of the storage plunger 91 and the negative pressure plunger 93 are inserted into the front end portion of the surrounding cylindrical portion 131 from the front.
On the inner peripheral surface of the surrounding cylindrical portion 131, a recessed portion 133 is formed to be spaced around the central axis O2 and extends over the entire length in the front-rear direction of the surrounding cylindrical portion 131. In the illustrated example, the depressions 133 are formed in a pair at an interval of 180 degrees around the central axis O2.

The recess portion 133 is opened forward and backward, and is defined by a pair of side wall surfaces (one side wall surface and the other side wall surface) facing each other in the circumferential direction around the central axis O2.
A stopper surface 134 facing forward is formed on one side wall surface. The other side wall surface is formed with a guiding surface 135 which is inclined to be separated from the stopper surface 134 as it goes from the front to the rear.

  The front end portion (start portion of the inclination) of the guide surface 135 is located forward of the stopper surface 134, and the rear end portion (the end portion of the inclination) is located rearward of the stopper surface 134. Further, a flat surface 136 which extends straight to the rear end of the surrounding cylindrical portion 131 along the central axis O2 is provided continuously at the rear end of the guide surface 135.

  The pair of recessed portions 133 formed in this manner and the locking rib 123 formed on the negative pressure plunger 93 are arranged at an interval in the front-rear direction. Therefore, the stopper surfaces 134 of the pair of recessed portions 133 and the rear end portions of the locking ribs 123 face each other at an interval in the front-rear direction. The outer diameter of the negative pressure main cylinder 120 in the negative pressure plunger 93 is smaller than the inner diameter of the surrounding cylinder portion 131. The locking rib 123 is formed to be insertable into the recess portion 133 from the front.

Thus, when the storage plunger 91 and the negative pressure plunger 93 move rearward (one side in the axial direction), the negative pressure plunger 93 gradually enters the surrounding cylindrical portion 131 and the rear of the locking rib 123 The end gradually approaches from the front to the stopper surface 134 and finally locks in contact with the stopper surface 134.
Therefore, the further rearward movement of the negative pressure plunger 93 and the storage plunger 91 can be restricted (see FIG. 7).

  Note that, as shown in FIG. 3, the positions of the storage plunger 91 and the negative pressure plunger 93 when the convex portion 117 blocks the communication hole 104 are set as the most advanced position. When the storage plunger 91 and the negative pressure plunger 93 are disposed at the most advanced position, little liquid is stored in the storage cylinder 90, and the communication between the storage cylinder 90 and the communication hole 104 is blocked. There is.

  On the other hand, the backward movement of the storage plunger 91 and the negative pressure plunger 93 finally retracts the positions of the storage plunger 91 and the negative pressure plunger 93 when the locking rib 123 is in contact with the stopper surface 134 from the front. Position (see Figure 7). When the storage plunger 91 has reached the final retreat position, the space S4 in the storage cylinder 90 contains the maximum amount of liquid.

As shown in FIGS. 1 and 3, the nozzle member 3 further includes a mounting cylinder 92 disposed below the negative pressure cylinder 94 and extending in the front-rear direction. In the present embodiment, the nozzle member 3 and the jet body 2 are connected by mounting the mounting cylinder 92 on the injection cylinder 11.
The mounting cylinder 92 protrudes rearward from an intermediate cylinder 140 that protrudes downward from the front end portion of the storage cylinder cylinder 96.
The storage cylinder 90, the negative pressure cylinder 94, the intermediate cylinder 140, and the mounting cylinder 92 are integrally formed.

  The intermediate cylinder 140 is integrally formed with a part of the closing flange 110. The inside of the intermediate cylinder 140 is in communication with the inside of the storage cylinder 90 through the supply hole 95a. Further, in the intermediate cylinder 140, a passage hole 141 which penetrates the intermediate cylinder 140 in the front-rear direction and communicates with the inside of the mounting cylinder 92 is formed. Thus, the inside of the intermediate cylinder 140 is in communication with the inside of the injection cylinder 11 through the passage hole 141.

  A plug 142 is inserted into the intermediate cylinder 140 over substantially the entire length in the vertical direction. The plug 142 is inserted from below into the intermediate cylinder 140 in a state in which the supply hole 95 a and the passage hole 141 are opened and the lower end opening of the intermediate cylinder 140 is tightly closed, for example. Between the plug 142 and the inner circumferential surface of the intermediate cylinder 140, a flow path 143 communicating the passage hole 141 with the supply hole 95a is formed. The space volume of the flow path 143 is formed small by the plug 142.

  At a connection portion between the intermediate cylinder 140 and the mounting cylinder 92, an insertion portion 144 which extends rearward and is inserted over substantially the entire length in the front-rear direction in the injection cylinder 11 is formed. The insertion portion 144 is inserted into the injection cylinder 11 so as to secure a slight gap S3 in the upper portion of the internal space of the injection cylinder 11. Thereby, the space volume in the injection | emission cylinder part 11 can be made small.

  Further, a connection wall 145 is provided to project downward at the connection portion between the intermediate cylinder 140 and the mounting cylinder 92. Then, the lower end portion of the connection wall 145 abuts on the upper end portion of the main plate member 80 of the trigger portion 51 from the front of the trigger portion 51, thereby positioning the trigger portion 51 in the foremost rocking position.

  In the present embodiment, the inside of the injection cylinder 11 and the ejection hole 4 communicate with each other through the passage hole 141, the flow passage 143, the supply hole 95a, the space S4 in the storage cylinder 90, the communication hole 104 and the flow passage 102. Do.

Furthermore, in the present embodiment, as shown in FIG. 1, FIG. 3 and FIG. 4, in the storage plunger 91, the operation member 150 is slidable in the front-rear direction and closely fitted to the storage plunger 91. It is arranged.
The operation member 150 has an operation portion main body 151 formed in a substantially two-step cylindrical shape whose front end portion is reduced in diameter from other portions corresponding to the shape of the storage plunger 91, and the inside of the front end portion in the operation portion main body 151 A check valve 152 is provided, and is assembled by being inserted from the rear into the storage plunger 91. The operation member 150 is fitted to the storage plunger 91 so as to be rotatable about the central axis O2.

The operation portion main body 151 is provided with a projecting portion 153 which protrudes rearward with respect to the storage plunger 91.
The protrusion 153 is disposed inside the surrounding tube portion 131. Further, at the rear end portion of the projecting portion 153, a knob portion 154 exposed to the outside of the cover body 55 through the opening 55a formed in the cover body 55 is formed. The knob portion 154 is formed in, for example, a ring shape whose central axis is disposed along the left-right direction, and has a shape that is easy to operate with a fingertip or the like.
However, the shape of the knob portion 154 is not limited to the ring shape, and may be designed freely.

In the projecting portion 153, a guided protrusion 155 that protrudes outward in the radial direction is formed in a portion located forward of the stopper surface 134 formed on the inner peripheral surface of the surrounding cylindrical portion 131.
In the illustrated example, the guided projections 155 are formed in a cylindrical shape, and are formed in a pair at an interval of 180 degrees around the central axis O2, and are arranged in the recessed portion 133. Further, the guided protrusion 155 is disposed to be spaced forward from the stopper surface 134, and is disposed to face the stopper surface 134 with a gap in the front-rear direction.

  The storage plunger 91 can be moved rearward from the most advanced position by utilizing a gap in the front-rear direction between the guided protrusion 155 and the stopper surface 134. The gap slightly moves the storage plunger 91 backward to such an extent that the liquid from the supply hole 95 a can be jetted from the ejection hole 4 through the space S 4 in the storage cylinder 90, the communication hole 104 and the flow passage 102. It is said that the amount of movement.

  Further, as shown in FIG. 5, when the operation guide 150 is rotated about the central axis O 2 with respect to the storage plunger 91, the guided projection 155 is separated from the front portion of the stopper surface 134 accordingly. And slides in the recess 133 while being guided by the guide surface 135. Thus, by performing the operation of rotating the operation member 150 around the central axis O2, it is possible to move the operation member 150 backward with respect to the storage plunger 91.

When the guided protrusion 155 moves to the rear end of the guide surface 135 (a connection portion between the guide surface 135 and the flat surface 136), the rotation of the operation member 150 is restricted. Thereby, it is possible to retract the operation member 150 relative to the storage plunger 91 by a fixed amount.
In addition, by moving the operation member 150 backward with respect to the storage plunger 91, the space S5 which is negative pressure can be formed in a portion located between the storage plunger 91 and the operation member 150.

  The check valve 152 is a valve that allows the discharge of the pressure (air) in the space S5 passing through the inside of the operation portion main body 151 and restricts the flow of air in the opposite direction. However, in the present embodiment, the check valve 152 is not essential and may not be provided. In this case, for example, the operation unit main body 151 may be formed into a top cylindrical shape.

As shown in FIG. 3, in the storage main body cylinder 115 of the storage plunger 91, a communication hole 160 penetrating the storage main body cylinder 115 in the radial direction is further formed. The communication hole 160 is formed in a portion located rearward of the first lip portion 115 a.
Thereby, in the negative pressure cylinder 94, the sealed space S6 (see FIGS. 6 and 7) which is a portion located forward of the negative pressure plunger 93 (located on the other side in the axial direction), the storage plunger 91 and the operation A communication hole 160, a minute gap between an outer peripheral surface of the storage main cylinder 115 and an inner peripheral surface of the storage cylindrical cylinder 96, and a connecting ring 122 The small clearance between the rear end opening edge of the storage cylinder 96 and the small clearance between the outer peripheral surface of the storage cylinder 96 and the inner peripheral surface of the negative pressure main cylinder 120 can be communicated.

That is, the communication hole 160, a minute gap between the outer peripheral surface of the storage main cylinder 115 and the inner circumferential surface of the storage cylinder 96, a minute gap between the connection ring 122 and the rear end opening edge of the storage cylinder 96, A minute gap between the outer peripheral surface of the storage cylinder 96 and the inner peripheral surface of the negative pressure main cylinder 120 is a closed space S6 in the negative pressure cylinder 94, and a space between the storage plunger 91 and the operation member 150. A communication passage 161 communicating with S5 is configured.
Since the communication hole 160 is positioned rearward of the first lip portion 115a, the space portion S5 between the storage plunger 91 and the operation member 150 by the first lip portion 115a and the ejection hole 4 are Communication can be prevented appropriately.

(Function of trigger type liquid jet)
Next, the case of using the trigger type liquid ejector 1 configured as described above will be described.
In addition, it is assumed that the liquid is filled in each part of the trigger type liquid jet device 1 by a plurality of operations of the trigger part 51, and the liquid can be sucked up from the vertical supply cylindrical part 10.

  First, in the state shown in FIGS. 1 to 3, when the trigger portion 51 is pulled backward against the biasing force of the elastic plate portion 54, the main piston 52 is retracted with the backward movement of the trigger portion 51, The liquid in the main cylinder 53 can be introduced into the inner cylinder 13 of the vertical supply cylinder 10 through the first through hole 66 and the second through hole 67. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 to close the valve, and pushes up the discharge valve 30 to open the valve, so the liquid is introduced into the injection cylinder 11 through the inner discharge hole 17 and the outer discharge hole 16. Liquid can be introduced.

As a result, the internal pressure of the injection cylinder 11 rises, so the liquid in the injection cylinder 11 is introduced into the intermediate cylinder 140, and is further introduced into the space S4 in the storage cylinder 90 through the flow path 143 and the supply hole 95a. can do.
Thereby, the storage plunger 91, the negative pressure plunger 93 and the operation member 150 are integrally moved rearward from the most advanced position until the guided projection 155 of the operation member 150 abuts against the stopper surface 134 of the mounting cylinder 130 It can be done.

As a result, as shown in FIG. 6, the convex portion 117 can be separated from the communication hole 104, and the communication hole 104 can be opened. Therefore, the liquid can be introduced 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 (normal ejection).
In particular, in the case of the present embodiment, at the time of normal ejection, the guided projection 155 abuts against the stopper surface 134 only by slightly moving the storage plunger 91 and the negative pressure plunger 93 backward, so that the amount of ejection once is As a result, the communication hole 104 can be immediately closed by the convex portion 117 after the ejection. Therefore, as in the case of a general liquid jet, it is possible to perform normal jet that follows the operation of the trigger unit 51 promptly.
In addition, the negative pressure plunger 93 moves rearward, whereby the closed space S6 in the negative pressure cylinder 94 becomes negative pressure. Thus, a biasing force directed forward can be applied to the negative pressure plunger 93 and the storage plunger 91.

  Then, 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 returns 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 up to the vertical supply cylindrical portion 10 through the pipe 15 in a state where the discharge valve 30 is closed by the negative pressure.

Then, the suctioned liquid is pushed up to open the suction valve 36 and introduced into the main cylinder 53. Thereby, it can prepare for the next injection.
At this time, the storage plunger 91, the negative pressure plunger 93, and the operation member 150 integrally move forward toward the most advanced position by the negative pressure of the closed space S6 in the negative pressure cylinder 94, and return to the original position.

Next, the case where the liquid stored in the storage cylinder 90 is continuously jetted from the ejection holes 4 will be described.
First, as shown in FIG. 5, when the operating member 150 is rotated about the central axis O2 using the knob 154, the guided projection 155 of the operating member 150 is disengaged from the front portion of the stopper surface 134, It slides in the recess 133 while being guided along the guide surface 135. Thereby, the operation member 150 can be moved backward with respect to the storage plunger 91.
The operation member 150 can be operated to rotate until the guided protrusion 155 reaches the rear end of the guide surface 135 (the connection portion between the guide surface 135 and the flat surface 136), and the rear end of the guide surface 135 is Once reached, further rotation can be restricted.

By retracting the operation member 150 with respect to the storage plunger 91, as shown in FIG. 5, the space portion S5 can be formed between the storage plunger 91 and the operation member 150 under negative pressure. Therefore, the negative pressure in the space S5 can be applied to the closed space S6 in the negative pressure cylinder 94 through the communication passage 161.
Therefore, even if the outside air intrudes into the closed space S6, the outside air can be exhausted to decompress the inside of the closed space S6. Therefore, when the storage plunger 91 moves backward, the closed space S6 can be reliably brought into a negative pressure state.

  Since the pressure receiving area of the negative pressure plunger 93 is set to be larger than the pressure receiving area of the operation member 150, the space S5 located between the operation member 150 and the storage plunger 91 is decompressed (negative pressure) Even if this is the case, the negative pressure plunger 93 can be prevented from being moved rearward and moved relative to the negative pressure cylinder 94 by the influence thereof. Therefore, it is possible to prevent the storage plunger 91 and the negative pressure plunger 93 from moving backward before operating the trigger portion 51.

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, as shown in FIG. 7, the storage plunger 91 and the negative pressure plunger 93 The liquid can be ejected forward from the ejection holes 4 while being integrally retracted 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.

  When the storage plunger 91 and the negative pressure plunger 93 move rearward, they gradually approach the operation member 150, and the closed wall 116 of the storage plunger 91 abuts on the front end portion of the operation member 150. Then, after contact, the storage plunger 91, the negative pressure plunger 93, and the operation member 150 integrally move rearward.

  As described above, each time the trigger portion 51 is pulled backward, the liquid can be jetted from the ejection holes 4, and the storage plunger 91 is moved backward to store the liquid in the storage cylinder 90 (fill can do. At this time, as described above, since the closed space S6 in the negative pressure cylinder 94 has a negative pressure, it is possible to apply a biasing force directed forward 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 the liquid from the injection cylinder portion 11 into the storage cylinder 90 is stopped, but the negative pressure in the negative pressure cylinder 94 causes a negative pressure. The plunger 93 and the storage plunger 91 begin to integrally move forward (return movement toward the other side in the axial direction) toward the most advanced position. Thus, 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.
As described above, the liquid can be jetted not only when the operation of pulling the trigger portion 51 backward but also when the trigger portion 51 is not operated, and the liquid can be continuously jetted.

In particular, before continuous injection, the operation member 150 can be moved backward with respect to the storage plunger 91 to reduce the pressure in the closed space S6 in the negative pressure cylinder 94 through the communication passage 161. As a result, when the storage plunger 91 moves backward, the sealed space S6 can be reliably brought into a negative pressure state.
Therefore, in the process of continuously injecting the liquid after storing the liquid in the storage cylinder 90, it is possible to suppress the reduction of the thrust directed to the front of the storage plunger 91 from the beginning to the end. Therefore, it is possible to stabilize the ejection state of the liquid and to improve the liquid drainage.

  Furthermore, since the storage cylinder 90 is disposed above the injection cylinder 11 and in parallel with the injection cylinder 11, the storage cylinder 90 is disposed to be continuous with the injection cylinder 11 in the front-rear direction. Compared to the case, the entire length of the trigger type liquid ejector 1 is shortened to achieve miniaturization, and the stroke of the storage plunger 91 is secured to facilitate continuous injection for a long time.

Further, in the storage cylinder 90, a communication hole 104 communicating with the ejection hole 4 and a supply hole 95a communicating with the inside of the injection cylinder 11 are respectively formed, and the storage plunger 91 directly closes the communication hole 104. Thus, the space volume (the internal volume occupied by the path) of the path from the injection cylinder 11 to the storage cylinder 90 can be reduced with ease without any restriction.
Therefore, when the trigger portion 51 is operated, the liquid can be immediately introduced into the storage cylinder 90 from the inside of the ejection cylinder portion 11, and the pressure in the storage cylinder 90 is rapidly increased to move the storage plunger 91 backward immediately. It is easy to do. Therefore, the liquid can be promptly ejected while suppressing the number of priming times. Therefore, it is easy to use and excellent in operability.

  Further, since the space volumes in the injection cylinder 11 and the intermediate cylinder 140 are further reduced by the insertion portion 144 and the plug 142, the pressure in the storage cylinder 90 can be raised more quickly. Therefore, the liquid can be jetted at a high injection pressure, and the storage plunger 91 can be moved backward more smoothly.

Furthermore, since the storage plunger 91 directly closes the communication hole 104, the liquid is not jetted 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 separately providing a high pressure valve or the like, and the configuration can be easily simplified. In addition, since the pressure can be accumulated by moving the storage plunger 91 biased forward by the negative pressure in the negative pressure cylinder 94 backward, the liquid can be jetted in a state where the pressure is further added to the liquid. .
In addition, it is possible to effectively suppress liquid leakage from the jet holes 4 when not in use.

When the storage plunger 91 advances, the storage plunger 91 moves to the full advance position unless the trigger 51 is pulled again. However, the operation to pull the trigger 51 may be repeated before that.
In this case, the storage plunger 91 gradually moves rearward as a whole while repeatedly moving backward and forward. Thereby, the liquid can be gradually accumulated in the storage cylinder 90. Then, by moving the storage plunger 91 to, for example, the last retreat position, the liquid can be continuously jetted for a long time until the storage plunger 91 moves from the last retreat position to the most advanced position.
When the storage plunger 91 and the negative pressure plunger 93 move to the final backward end position, the locking rib 123 abuts on the stopper surface 134, and the further backward movement of the plungers 91 and 93 is restricted.

  As described above, according to the trigger type liquid jet device 1 of the present embodiment, not only when the operation of pulling the trigger portion 51 is performed backward, but also when the trigger portion 51 is not operated, the liquid is ejected It is possible to perform a continuous injection of liquid.

In particular, since the closed space S6 in the storage plunger 91 can be depressurized by using the operation member 150 before continuous injection, the inside of the closed space S6 may be caused, for example, by the entry of outside air due to leaving for a long period of time. Even if the degree of pressure reduction is reduced, the outside air can be exhausted to return the closed space S6 to an appropriate pressure-reduced state again to be a negative pressure. Therefore, stable continuous injection can be performed and liquid drainage can be improved.
The operation of the operation member 150 is not necessarily performed every time. For example, when the negative pressure in the sealed space S6 is appropriately reduced, the operation member 150 does not need to be operated.

  Further, in the case of the present embodiment, the operation member 150 can be moved backward with respect to the storage plunger 91 by rotating the operation member 150 around the central axis O2, so the operation member 150 can be simply moved backward. Better operability can be provided than when moving.

  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 to such an extent that the liquid stored in the storage cylinder 90 can be reliably pushed out. It is 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 can be smoothly moved forward and the liquid can be stably and continuously ejected from the ejection holes 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 component such as a coil spring Differently, it is possible to suppress an extra load (load) acting on each component except at the time of operation (during liquid ejection). Therefore, it is possible to suppress, for example, the occurrence of liquid leakage caused by cracking or elongation in each component.
In addition, when metal parts such as coil springs are used, the environmental load at the time of disposal is large and the cost tends to be high. On the other hand, in the present embodiment using a negative pressure, for example, since it is possible to constitute by a single material of only resin, the load on the environment is small and the cost can also be suppressed.
Furthermore, although utilization of a metal spring etc. can be considered as a general biasing member, in this embodiment, the trigger type liquid ejector 1 is formed only with a synthetic resin material by not using this kind of biasing member. It is also possible.

Second Embodiment
Next, a second embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings.
In the second embodiment, the same parts as those in the first embodiment are indicated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 8 and 9, the trigger type liquid ejector 170 of the present embodiment includes an operation member 171 having a rotation member 172 connected to the operation portion main body 151. The rotating member 172 is rotatably attached to the support member 180 about the central axis O2. The support member 180 is attached to a connecting cylindrical portion 190 connected to the storage plunger 91 and the negative pressure plunger 93.
The connecting cylindrical portion 190 and the support member 180 will be described first.

  The connecting cylindrical portion 190 is formed to extend rearward from the connecting ring portion 122 along the central axis O 2, and is disposed inside the surrounding cylindrical portion 131. The outer peripheral surface of the connecting cylindrical portion 190 is formed with a lateral groove 191 which opens rearward and extends in the front-rear direction over the entire length. In the illustrated example, a plurality of lateral grooves 191 are formed at intervals around the central axis O2. In each of the lateral grooves 191, a restriction piece 192 which is provided so as to protrude inward in the radial direction from the inner peripheral surface of the surrounding cylindrical portion 131 is fitted.

  Thereby, the rotation of the connecting cylindrical portion 190 about the central axis O2 is restricted with respect to the surrounding cylindrical portion 131 attached to the negative pressure cylinder 94, and the movement of the surrounding cylindrical portion 131 in the front-rear direction is permitted. In the closed state, it is disposed inside the surrounding tube portion 131.

  The support member 180 is, as shown in FIGS. 9, 10 and 11, from the rear end portion of the fitting cylindrical portion 181 fitted inside the rear end portion of the connecting cylindrical portion 190 and the rear end portion of the fitting cylindrical portion 181 An annular flange wall 182 projecting radially outward and coming in contact with the rear end open end of the connecting cylindrical portion 190 from the rear, and a support cylindrical portion 183 projecting rearward from the flange wall 182 ing.

  The fitting cylindrical portion 181 is fitted inside the connecting cylindrical portion 190 by being inserted into the connecting cylindrical portion 190 from the rear. A plurality of lateral ribs 184 are formed on the outer peripheral surface of the fitting cylindrical portion 181 so as to project outward in the radial direction and at intervals around the central axis O2. The lateral ribs 184 are formed on the inner circumferential surface on the rear end side of the connecting cylindrical portion 190 at intervals around the central axis O2, and are fitted in the lateral grooves 185 opened rearward. Thereby, the fitting cylindrical portion 181 is combined with the connecting cylindrical portion 190 in a state in which the rotation around the central axis O2 is restricted.

The flange wall 182 is disposed in an opening 55 a formed in the cover body 55. The support cylindrical portion 183 protrudes rearward with respect to the cover body 55, and a pair of concave portions 186 are formed on the outer peripheral surface of the support cylindrical portion 183 at positions 180 degrees apart around the central axis O2.
Each recess 186 has a stopper surface 187 facing in one direction in the circumferential direction of the support cylindrical portion 183 and a curved surface 188 smoothly curved rearward as it goes from the front end of the stopper surface 187 in one direction in the circumferential direction. It is made up.

Next, the operation member 171 will be described.
As shown in FIGS. 8 and 9, the projecting portion 153 in the operation portion main body 151 of the present embodiment is disposed inside the connecting cylindrical portion 190, and a cover body through the opening 55a formed in the cover body 55. It projects further back than 55. In the projecting portion 153, a third lip portion 153a that protrudes toward the outer side in the radial direction and is in close contact with the inner circumferential surface of the connecting cylindrical portion 190 at a portion located rearward of the connecting ring portion 122 It is formed.
A slight gap is formed between the outer peripheral surface of the projecting portion 153 and the inner peripheral surface of the fitting cylindrical portion 181, and the projecting portion 153 is movable in the front-rear direction with respect to the fitting cylindrical portion 181. It is done.

  The rotating member 172 has an inner cylindrical portion 173 rotatably inserted inside the support cylindrical portion 183, an outer cylindrical portion 174 surrounding the support cylindrical portion 183 from the outer side, and a rear end than the rear end opening end of the support cylindrical portion 183. And an annular connecting wall 175 connecting the rear end of the inner cylindrical portion 173 and the rear end of the outer cylindrical portion 174, and a pair of knobs 176 projecting rearward from the connecting wall 175. ing.

  An annular locking projection 173 a protruding inward in the radial direction is formed on the inner peripheral surface of the inner cylindrical portion 173, and enters an annular groove 153 b formed on the outer peripheral surface of the rear end of the projecting portion 153. It is locked by. Thus, the rotating member 172 and the projecting portion 153 move integrally at least in the front-rear direction.

On the inner peripheral surface of the outer cylindrical portion 174, a convex portion 117 is formed which enters into the concave portion 186 formed in the inner cylindrical portion 173. The convex portion 117 is formed in a pair corresponding to the concave portion 186, and has an abutting surface 178 which abuts against the stopper surface 187 of the concave portion 186, and a curved surface 179 in sliding contact with the curved surface 188 of the concave portion 186. Have.
Thereby, as shown in FIG. 9, the rotating member 172 is in the state in which the contact surface 178 of the convex portion 117 is in contact with the stopper surface 187 of the concave portion 186 as shown in FIG. It is possible to rotate in one direction in the circumferential direction about the As shown in FIG. 9, when the rotating member 172 is rotated approximately 90 degrees, further rotation is restricted.

  In addition, since the convex portion 117 slides along the curved surface 188 of the concave portion 186 by rotating the rotary member 172, the rotary member 172 can be moved rearward with respect to the support member 180. it can. As a result, the operation portion main body 151 locked to the inner cylindrical portion 173 of the rotation member 172 can be moved rearward with respect to the storage plunger 91.

Furthermore, in the case of the present embodiment, the communication hole 160 is formed in the connection ring 122.
Thus, the closed space S6 in the negative pressure cylinder 94 and the space S5 positioned between the storage plunger 91 and the operation member 171 are the outer peripheral surface of the storage main cylinder 115 and the inner peripheral surface of the storage cylinder cylinder 96. Between the connection ring portion 122 and the rear end opening edge of the storage cylinder cylinder 96, the communication hole 160, between the rear end opening edge of the storage cylinder cylinder 96 and the third lip 153a. It communicates through a minute gap and a minute gap between the outer peripheral surface of the storage cylinder cylinder 96 and the inner peripheral surface of the negative pressure main cylinder 120. Then, these communication paths constitute the communication path 161.

(Function of trigger type liquid jet)
The case where the trigger type liquid ejector 170 comprised in this way is used is demonstrated. Even in the case of the present embodiment, both the normal injection and the continuous injection of the liquid can be performed.

  When normal injection is performed, as in the first embodiment, the trigger 51 is pulled to introduce the liquid into the space S4 in the storage cylinder 90, whereby the storage plunger 91, the negative pressure plunger 93, and the connecting cylinder portion The whole of the support member 180 and the operation member 171 can be moved rearward integrally. As a result, the convex portion 117 can be separated from the communication hole 104 and the communication hole 104 can be opened. Therefore, the liquid is guided to the ejection hole 4 through the communication hole 104 and the flow passage 102 and directed forward from the ejection hole 4 The liquid can be jetted.

  At this time, since the closed space S6 in the negative pressure cylinder 94 can be set to a negative pressure, an urging force directed to the front side can be applied to the negative pressure plunger 93 and the storage plunger 91. Therefore, by releasing the trigger part 51, the storage plunger 91, the negative pressure plunger 93, and the operation member 171 can be integrally returned toward the most advanced position by the negative pressure in the closed space S6.

  When continuous injection is performed, as shown in FIG. 9, the rotary member 172 is rotated approximately 90 degrees around the central axis O2 using the knob piece 176. Thus, the rotation member 172 can be moved backward with respect to the support member 180, and accordingly, the operation portion main body 151 can be moved backward with respect to the storage plunger 91. That is, the entire operation member 171 can be moved backward with respect to the storage plunger 91.

Thereby, as shown in FIG. 9, it is possible to form a space portion S5 which has been under negative pressure between the storage plunger 91 and the operation member 171. Therefore, the negative pressure in the space S5 can be applied to the closed space S6 in the negative pressure cylinder 94 through the communication passage 161.
Therefore, even if the outside air intrudes into the closed space S6, the outside air can be exhausted to decompress the inside of the closed space S6. Therefore, when the storage plunger 91 moves backward, the closed space S6 can be reliably brought into a negative pressure state.

  In addition, since the support member 180 and the support cylindrical portion 183 are both restricted from rotating about the central axis O2, they do not rotate together when the rotating member 172 is rotated. Therefore, pressure reduction of sealed space S6 can be performed reliably.

Thereafter, the trigger portion 51 is pulled backward similarly to the first embodiment, and the liquid is introduced into the storage cylinder 90, whereby the storage plunger 91 and the negative pressure plunger 93 are moved from the most advanced position as shown in FIG. The liquid can be jetted from the jet holes 4 forward while being integrally retracted. Further, 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 portion S4.
In addition, in the case of the present embodiment, together with the storage plunger 91 and the negative pressure plunger 93, the connecting cylindrical portion 190, the support member 180 and the operation member 171 also integrally move rearward.

  Therefore, each time the trigger portion 51 is pulled backward, the liquid can be jetted from the ejection holes 4 and the liquid can be stored (filled) in the storage cylinder 90. At this time, by making the closed space S6 in the negative pressure cylinder 94 a negative pressure, it is possible to exert an urging force on the negative pressure plunger 93 and the storage plunger 91 toward the front side.

Then, by stopping the pulling operation of the trigger portion 51 and releasing the trigger portion 51, the negative pressure in the negative pressure cylinder 94 causes the negative pressure plunger 93, the storage plunger 91, the connecting cylindrical portion 190, the support member 180, and the operation. The member 171 starts to move forward integrally toward the most advanced position. Thus, 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.
Therefore, even in the case of the present embodiment, the liquid can be continuously jetted, and the same effect as that of the first embodiment can be achieved.

In particular, even in the case of the present embodiment, since the closed space S6 in the negative pressure cylinder 94 can be depressurized through the communication passage 161 in advance before continuous injection, when the storage plunger 91 moves backward. The negative pressure can be reliably made in the closed space S6.
Therefore, in the process of continuously injecting the liquid after storing the liquid in the storage cylinder 90, it is possible to suppress the reduction of the thrust directed to the front of the storage plunger 91 from the beginning to the end. Therefore, it is possible to stabilize the ejection state of the liquid and to improve the liquid drainage.

  In the present embodiment, even when the continuous ejection is completed and the storage plunger 91 returns to the most advanced position, the space portion S5 which is negative pressure is still formed between the storage plunger 91 and the operation member 171. It is done. Therefore, finally, the rotation member 172 is reversely rotated about the central axis O2, and the front end portion of the operation portion main body 151 is brought into contact with the closed wall 116 of the storage cylinder 90 from behind. Thus, the operation member 171 can be returned to the original position, and the pressure (air) in the space S5 can be discharged to the outside through the check valve 152.

Third Embodiment
Next, a third embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings.
In the third embodiment, the same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 13 and 14, the trigger type liquid ejector 200 of the present embodiment includes an operation member 201 having an operation lever 202 connected to the operation portion main body 151.
Further, at the rear end portion of the connecting cylindrical portion 190, a cylindrical support cap 210 for supporting the projecting portion 153 of the operation portion main body 151 so as to be movable in the front-rear direction is mounted.

  The support cap 210 protrudes from the rear end portion of the fitting cylindrical portion 211 to the outside in the radial direction from the fitting cylindrical portion 211 fitted inside the rear end portion of the connecting cylindrical portion 190, and the connecting cylinder And an annular cap wall 212 that comes in contact with the rear end open end of the portion 190 from the rear. The cap wall 212 is disposed in an opening 55 a formed in the cover 55.

The projecting portion 153 in the operation portion main body 151 of the present embodiment is disposed inside the connection cylindrical portion 190 and, after being inserted through the support cap 210, the cover body 55 through the opening 55 a formed in the cover body 55. It projects further backward than it is. At a rear end portion of the projecting portion 153, an axial hole 215 penetrating the projecting portion 153 in the left-right direction is formed.
A slight gap is formed between the outer peripheral surface of the protruding portion 153 and the inner peripheral surface of the fitting cylindrical portion 211, and the protruding portion 153 is movable in the front-rear direction with respect to the fitting cylindrical portion 211. It is done.

  The operation lever 202 extends in the vertical direction and is arranged side by side across the projection 153 so as to integrally connect the pair of lever pieces 203 in contact with the cap wall 212 with the pair of lever pieces 203. And an operation piece 204 inclined rearward as it goes downward.

The pair of lever pieces 203 is formed with a shaft portion 205 that protrudes toward the shaft hole 215 and is pivotally supported by the shaft hole 215. As a result, as shown in FIG. 15, it is possible to rotate the control lever 202 so as to pull it upward about the axis M of the shaft hole 215. By performing this rotation operation, the upper end portions of the pair of lever pieces 203 can be slid downward while being in contact with the cap wall 212. Thus, the projecting portion 153 can be moved backward via the shaft portion 205.
Therefore, it is possible to move the operation portion main body 151 backward with respect to the storage plunger 91 by pulling up the operation lever 202 (rotation operation).

Note that, as shown in FIG. 13, folded pieces 206 extending rearward are formed at upper end portions of the pair of lever pieces 203. The folded back piece 206 is inclined so as to extend downward from the upper end of the lever piece 203 toward the rear.
Thereby, when the operation lever 202 is pulled up, as shown in FIG. 15, the folded back piece 206 can be brought into contact with the cap wall 212. Therefore, it is possible to restrict the subsequent pulling operation of the operating lever 202 and to stabilize the posture of the operating lever 202 after the pulling operation.

(Function of trigger type liquid jet)
In the case of the trigger type liquid ejector 200 configured in this manner, the second embodiment is different from the second embodiment only in that the operation portion main body 151 is moved backward with respect to the storage plunger 91 by the pulling operation of the operation lever 202. The same effect as that of the second embodiment can be achieved successfully.

That is, as shown in FIG. 15, the operating lever main body 151 is moved backward with respect to the storage plunger 91 by pulling up the operation lever 202, so that negative pressure is generated between the storage plunger 91 and the operation member 201. Space part S5 can be formed.
Thereafter, the trigger portion 51 is pulled backward, and the liquid is introduced into the storage cylinder 90, whereby the storage plunger 91 and the negative pressure plunger 93 can be moved rearward as shown in FIG. The liquid can be gradually stored in the storage cylinder 90 using the

  Also in the case of the present embodiment, together with the storage plunger 91 and the negative pressure plunger 93, the connection cylindrical portion 190, the support cap 210, and the operation member 201 integrally move rearward.

Then, by stopping the operation of pulling the trigger portion 51 and releasing the trigger portion 51, the negative pressure in the negative pressure cylinder 94 causes the negative pressure plunger 93, the storage plunger 91, the connecting cylindrical portion 190, the support cap 210, and the operation. The member 201 starts to move forward integrally toward the most advanced position. Thus, 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.
Therefore, even in the case of the present embodiment, it is possible to perform continuous injection of the liquid.

  In the case of the present embodiment as well, finally, the pulled-up operation lever 202 is returned to the original position, and the front end portion of the operation portion main body 151 is brought into contact with the closing wall 116 of the storage cylinder 90 from the rear. Thus, the operation member 201 can be returned to the original position, and the pressure (air) in the space S5 can be discharged to the outside through the check valve 152.

Fourth Embodiment
Next, a fourth embodiment of the trigger type liquid ejector according to the present invention will be described with reference to the drawings.
In the fourth embodiment, the same parts as those in the first embodiment are indicated by the same reference numerals and the explanation thereof is omitted.

  As shown in FIGS. 17 to 19, in the trigger type liquid ejector 220 of the present embodiment, the ejector main body 2 includes a storage cylinder 221, a negative pressure cylinder 222, a storage plunger 223, and a negative pressure plunger 224. Further, the injection cylinder 11 is not integrally connected to the vertical supply cylinder 10, but is disposed in front of the vertical supply cylinder 10 in a state of being separated from the vertical supply cylinder 10, and the storage cylinder 221 It communicates with the inside of the vertical supply cylinder portion 10 through the inside and a connection cylinder portion 230 described later.

The discharge valve 30 shown in the first embodiment is not provided in the inner cylinder 13 of the vertical supply cylinder portion 10 of the present embodiment. Instead of the discharge valve 30, the top wall 12d of the outer cylinder 12 is formed with a seal cylinder 12e extending downward and a restriction protrusion 12f.
The restricting protrusion 12f is disposed coaxially with the axis O1, and restricts the upward movement of the suction valve 36. The seal cylindrical portion 12e is formed to surround the restriction protrusion 12f from the outer side in the radial direction, and extends downward with a length similar to that of the restriction protrusion 12f. The seal cylinder 12 e is fitted inside the upper end of the small diameter portion 13 b of the inner cylinder 13.

  As shown in FIG. 17 and FIG. 19, a connection cylindrical portion 230 extends forward on the upper end portion of the vertical supply cylindrical portion 10. The rear end portion of the connection cylindrical portion 230 is connected to the front side of the upper end portion of the small diameter portion 12 b of the outer cylinder 12. The rear end opening of the connection cylindrical portion 230 is open in the seal cylindrical portion 12e. Thus, the connection cylindrical portion 230 communicates with the inside of the vertical supply cylindrical portion 10.

  At the front end portion of the connection cylindrical portion 230, a closing plug 231 closely fitted in the connection cylindrical portion 230 and closing the front end opening of the connection cylindrical portion 230 is provided. The closing plug 231 is provided with a protrusion 232 that protrudes rearward. The projecting portion 232 reduces the flow passage cross-sectional area of the connection cylindrical portion 230.

  Thus, since the connection cylinder part 230 is formed, the cylinder part 40 for cylinders has the dividing wall W1 common to the connection cylinder part 230. As shown in FIG. Furthermore, the cylinder part 40 for cylinders has the partition wall W2 common to the flange part 12c.

  A storage cylinder 221 is disposed above the connection cylindrical portion 230. The storage cylinder 221 is supplied with the liquid that has passed through the vertical supply cylindrical portion 10 and the connection cylindrical portion 230 by swinging (movement) to the rear of the trigger portion 51. It is done.

  The storage cylinder 221 is formed in a tubular shape extending in the front-rear direction, and is disposed parallel to the connection cylindrical portion 230. In the illustrated example, the storage cylinder 221 is formed to project rearward relative to the vertical supply cylinder 10. The central axis O2 of the storage cylinder 221 extends in the front-rear direction.

  The storage cylinder 221 includes a front wall portion 240 disposed above the front end portion of the connection cylindrical portion 230, and a storage cylinder cylinder 241 extending rearward from the front wall portion 240, and is opened as a whole as a whole. It is formed in a tubular shape.

A mounting recess 242 and a communication hole 243 are formed in the front wall portion 240.
The mounting recess 242 is formed in the rear end surface of the front wall portion 240 in an annular shape coaxial with the central axis O 2 of the storage cylinder 221. The communication hole 243 is formed to penetrate the front wall portion 240 in the front-rear direction. The communication hole 243 is disposed inside the mounting recess 242 when the front wall portion 240 is viewed in the front-rear direction.

The storage cylinder cylinder 241 is formed in a multistage cylindrical shape in which the diameter is slightly expanded on the way from the front wall portion 240 to the rear.
Specifically, the storage cylinder 241 is formed to have a slightly larger outer diameter and inner diameter than the front cylinder portion 245 connected to the front wall portion 240 and the front cylinder portion 245, and the rear end portion of the front cylinder portion 245 And a rear cylinder 246 extending further rearward than the vertical supply cylinder 10.

  A supply hole 247 communicating the inside of the storage cylinder cylinder 241 with the inside of the connection cylindrical portion 230 is formed in a portion close to the front wall portion 240 in the lower portion of the front cylindrical portion 245. Accordingly, the liquid that has passed through the connection cylindrical portion 230 is supplied into the storage cylinder 221 through the supply hole 247. The projecting portion 232 of the blocking plug 231 is disposed in the supply hole 247.

  The lower side portion of the front cylinder portion 245 constitutes a partition wall W3 common to the connection cylinder portion 230. A plurality of communication grooves 248 extending in the front-rear direction are formed on the inner circumferential surface of the rear end portion of the front cylindrical portion 245 at intervals around the central axis O2.

  The lower portion of the front end portion of the rear cylindrical portion 246 constitutes a partition wall W4 common to the top wall portion 12d. A recovery hole 249 is formed in the partition wall W4 so as to penetrate the partition wall W4 in the vertical direction. A plurality of recovery holes 249 are formed at intervals around the axis O1. More specifically, the recovery hole 249 is formed so as to be disposed between the seal cylinder 12e and the small diameter portion 12b of the outer cylinder 12 when viewed from the direction of the axis O1.

  Further, as shown in FIG. 18, the vertical supply cylindrical portion 10 is formed with a collection passage 250 which communicates with the collection hole 249 and which vertically cuts the vertical supply cylindrical portion 10 in the vertical direction. Specifically, the recovery passage 250 is formed to penetrate the small diameter portion 13b of the inner cylinder 13 in the vertical direction, and communicates with the inside of the large diameter portion 13a. Therefore, the inside of the storage cylinder 221 and the inside of the container body A are in communication through the recovery hole 249 and the recovery passage 250.

As shown in FIGS. 17 and 19, the negative pressure cylinder 222 is integrally formed with the storage cylinder 221.
The negative pressure cylinder 222 has an annular negative pressure cylinder wall 260 formed to project radially outward of the storage cylinder 221 from the rear cylinder portion 246 in the storage cylinder cylinder 241, and the outer peripheral edge of the negative pressure cylinder wall 260. And a negative pressure cylinder cylinder 261 extending rearward from the portion, and is formed in a cylindrical shape that is opened rearward as a whole.
The lower portion of the negative pressure cylinder wall 260 constitutes a partition wall W5 common to the small diameter portion 12b of the outer cylinder 12.

  The negative pressure cylinder 261 is disposed coaxially with the central axis O 2 and is formed to project further rearward than the rear cylinder 246. Thus, the negative pressure cylinder 261 encloses the rear cylinder 246 from the outside. The rear end opening edge of the negative pressure cylinder cylinder 261 is in contact with the cover body 55 from the front.

  In the storage cylinder 221 configured in this manner, the inflow of liquid from the inside of the connection cylinder 230 through the supply hole 247 into the storage cylinder 221 is permitted, and the connection cylinder from the inside of the storage cylinder 221 through the supply hole 247 is connected A reservoir valve 265 is attached which regulates the flow of liquid into the portion 230.

The storage valve 265 is a check valve provided with a base 266 formed in an annular shape coaxial with the central axis O 2 and a cylindrical valve body 267 extending rearward from the outer peripheral edge of the base 266. ing. The base portion 266 is disposed on the rear end surface of the front wall portion 240 and is fixed to the front wall portion 240 by a part of the base portion entering the mounting recess 242 from the rear.
The valve body portion 267 is elastically deformable in the radial direction of the storage cylinder 221, and the rear end portion is seated so as to be separable from the inner circumferential surface of the storage cylinder cylinder 241. The rear end portion of the valve body portion 267 is located rearward of the supply hole 247. Thereby, the valve body portion 267 closes the supply hole 247 from the inside of the storage cylinder 221 so as to freely open and close.

  The storage cylinder 221 is disposed movably in the front-rear direction (axial direction) along the central axis O 2, and is directed rearward (one side in the axial direction) as the liquid is supplied into the storage cylinder 221. The storage plunger 223 which moves is accommodated.

  The storage plunger 223 is formed coaxially with the central axis O2 and has a double cylindrical shape including a cylindrical outer plunger 270 extending in the front-rear direction and a cylindrical inner plunger 271 extending in the front-rear direction. . The outer plunger 270 is combined with the outer side of the inner plunger 271. The outer plunger 270 can be made of, for example, a softer material than the inner plunger 271.

The outer plunger 270 includes an outer plunger cylinder 275 extending in the front-rear direction, and an outer closing wall 276 closing the front end opening of the outer plunger cylinder 275.
The outer plunger cylinder 275 is formed in a multistage cylindrical shape whose diameter gradually increases in the direction from the front side to the rear side corresponding to the shape of the storage cylinder cylinder 241. The rear end of the outer plunger cylinder 275 is located rearward of the front cylinder 245 of the storage cylinder 241 and forward of the rear end of the rear cylinder 246.

The outer peripheral surface of the outer plunger cylinder 275 is provided with a fourth lip portion 277 and a fifth lip portion 278 which are spaced apart in the front-rear direction.
The fourth lip portion 277 and the fifth lip portion 278 are annularly formed over the entire circumference of the outer plunger cylinder 275 in the circumferential direction.
The fourth lip 277 is in close sliding contact with the inner circumferential surface of the front barrel 245, and slides in the front-rear direction on the inner circumferential surface of the front barrel 245 as the storage plunger 223 moves back and forth.
The fifth lip 278 is disposed rearward of the fourth lip 277, is in close sliding contact with the inner peripheral surface of the rear cylinder 246, and is moved in the rear cylinder 246 as the storage plunger 223 moves back and forth. It slides on the circumferential surface in the front and back direction.

The front end face of the outer blocking wall 276 is in contact with the rear end face of the base 266 from the rear thereof. Thus, the outer closing wall 276 closes the communication hole 243.
Further, on the front end face of the outer closing wall 276, a convex portion 279 which protrudes forward from the outer closing wall 276 and is disposed inside the base 266, and a concave groove 280 extending in the radial direction of the storage plunger 223; Is formed. The recessed groove 280 is formed in a portion of the front end surface of the outer closed wall 276 excluding the convex portion 279 and opens toward the valve body 267.

Therefore, when the front end face of the outer blocking wall 276 is in contact with the rear end face of the base 266 and the projection 279 is disposed inside the base 266, the communication between the recessed groove 280 and the communication hole 243 is blocked There is.
Further, in the convex portion 279, a connecting shaft 281 protruding rearward from the central portion of the convex portion 279 is formed coaxially with the central axis O2.

The inner plunger 271 includes an inner plunger cylinder 285 extending in the front-rear direction, and an inner closing wall 286 closing the front end opening of the inner plunger cylinder 285.
The inner plunger cylinder 285 is formed in a multistage cylindrical shape whose diameter gradually increases in the direction from the front side to the rear side corresponding to the shape of the storage cylinder cylinder 241. The inner plunger cylinder 285 protrudes rearward with respect to the outer plunger cylinder 275. The portion of the inner plunger cylinder 285 that protrudes rearward relative to the outer plunger cylinder 275 is in contact with the inner peripheral surface of the rear cylinder 246 in the storage cylinder 241, and the rear end of the rear cylinder 246 It extends up to

  A connection hole 287 through which the connection shaft 281 is inserted from the front is formed in the inner closed wall 286 so as to penetrate the inner closed wall 286 in the front-rear direction. The connecting shaft 281 enters the connecting hole 287 from the front and is locked to the connecting hole 287. Thus, the outer plunger 270 and the inner plunger 271 are integrally combined.

A cylindrical negative pressure plunger 224 is integrally formed with the storage plunger 223 configured in this manner.
The negative pressure plunger 224 is disposed between the outer peripheral surface of the rear cylindrical portion 246 in the storage cylinder 221 and the inner peripheral surface of the negative pressure cylinder 222, and is arranged coaxially with the central axis O2. Thereby, the storage plunger 223 and the negative pressure plunger 224 are formed in a double cylinder shape in which the negative pressure plunger 224 is disposed outside the storage plunger 223 as a whole.

  The negative pressure plunger 224 includes a negative pressure plunger cylinder 290 extending in the front-rear direction, an annular negative pressure plunger wall 291 projecting radially outward from the front end of the negative pressure plunger cylinder 290, and a storage cylinder 221. And a connection ring 292 which is positioned rearward of the rear end opening end of the rear cylinder 246 and connects the rear end of the inner plunger cylinder 285 and the rear end of the negative pressure plunger cylinder 290. .

  At the outer peripheral edge of the negative pressure plunger wall 291 is formed an annular sixth lip portion 293 that protrudes rearward. The sixth lip portion 293 is in close sliding contact with the inner peripheral surface of the negative pressure cylinder cylinder 261, and along the back and forth movement of the storage plunger 223 and the negative pressure plunger 224, the sixth lip portion 293 is on the inner peripheral surface of the negative pressure cylinder cylinder 261. Slide in the back and forth direction.

The pressure receiving area of the negative pressure plunger 224 is set to be larger than the pressure receiving area of the storage plunger 223.
Specifically, when the respective outer surfaces of the negative pressure plunger 224 and the storage plunger 223 are projected onto the projection plane orthogonal to the central axis O2, the negative pressure plunger 224 appears in an annular shape coaxial with the central axis O2 in the projection plane. The area of the shadow (the projection area of the negative pressure plunger 224) is set larger than the area of the shadow of the storage plunger 223 (the projection area of the storage plunger 223) appearing in a circular shape coaxial with the central axis O2 on the projection plane.

The projection area of the negative pressure plunger 224 is, in the above projection plane, an inner end in the radial direction of the negative pressure plunger 224 (in the illustrated example, an inner peripheral edge of the connection ring 292) and an outer end (in the illustration In the example, the area of the portion located between the outer edge of the sixth lip portion 293 and
The projected area of the storage plunger 223 is the area of a portion located inside the radial outer end (the outer peripheral edge of the fifth lip 278 in the illustrated example) of the storage plunger 223 on the projection plane.

Further, the pressure receiving area of the negative pressure plunger 224 is set to be larger than the pressure receiving area of the operation member 300.
The operation member 300 is slidable in the front-rear direction in the storage plunger 223 and closely fitted to the storage plunger 223. Therefore, the projection area of the operation member 300 corresponds to the projection area in the storage plunger 223, and more specifically, on the projection plane, inside the enlarged diameter portion of the inner plunger cylinder 285 formed in a multistage cylindrical shape. It is a part to be located.

  In the storage plunger 223 configured in this manner, the operation member 300 is slidable in the front-rear direction and closely fitted to the storage plunger 223, and the operation member 300 is backward with respect to the storage plunger 223. And a holding cylinder 301 for holding the operation member 300 at that position.

  The operation member 300 includes a cylindrical operation main body 310 extending in the front-rear direction, a seal member 311 externally fitted to the front end of the operation main body 310, and a knob integrally formed on the rear end of the operation main body 310. A portion 312, and is assembled by being inserted from the rear into the inner plunger 271. The operation member 300 is rotatably combined with the storage plunger 223 about the central axis O2.

  The operation main body portion 310 is formed in a cylindrical shape coaxially arranged with the central axis O 2, the front end portion is disposed slightly behind the inner closing wall 286 of the inner plunger 271, and the rear end portion in the negative pressure cylinder cylinder 261. It is located inside the rear cylinder portion 246.

The seal member 311 is externally fitted to the front end portion of the operation main body portion 310, is formed in a top cylindrical shape that closes the front opening portion of the operation main body portion 310, and is disposed coaxially with the central axis O2.
The seal member 311 and the operation main body portion 310 are fixed by, for example, undercut fitting, and the seal member 311 and the operation main body portion 310 integrally move in the front-rear direction.

  A seventh lip portion 315 is formed on the circumferential wall portion of the seal member 311 so as to project radially outward and to extend in the circumferential direction of the seal member 311. The seventh lip portion 315 is in close sliding contact with the inner peripheral surface of the inner plunger cylinder 285 and slides in the front-rear direction on the inner peripheral surface of the inner plunger cylinder 285 as the operation member 300 moves back and forth.

  As described above, since the seventh lip portion 315 is provided, as shown in FIG. 20, by moving the operation member 300 backward with respect to the storage plunger 223, the seventh lip portion 315 of the operation member 300 is moved. It is possible to form a negative pressure space S5 between the portion located forward and the inner plunger 271.

In addition, in a connection portion between the inner plunger cylinder 285 and the inner closing wall 286, a communication hole 320 for communicating the inside and the outside of the inner plunger 271 is formed.
As a result, a portion (located on the other side in the axial direction) of the negative pressure cylinder 222 forward of the negative pressure plunger 224 is defined between the negative pressure cylinder wall 260 and the negative pressure plunger wall 291. The sealed space S6 which is a part) and the space part S5 which is a part located between the inner plunger 271 and the operation member 300 can be communicated through the communication passage 321.

  The communication passage 321 includes a communication hole 320, a minute gap between the outer peripheral surface of the inner plunger cylinder 285 and the inner peripheral surface of the outer plunger cylinder 275, the outer peripheral surface of the inner plunger cylinder 285 and the inner peripheral surface of the rear cylinder portion 246. Between the connection ring 292 and the rear end opening edge of the rear cylinder 246, and between the outer peripheral surface of the rear cylinder 246 and the inner peripheral surface of the negative pressure plunger cylinder 290. Composed of a gap.

Further, an air hole 316 is formed in the central portion of the front wall (top wall) of the seal member 311 so as to penetrate the front wall in the front-rear direction.
Then, inside the front end portion of the operation body portion 310, discharge of pressure (air) from the inside of the space S5 through the air hole 316 is permitted, and air into the space S5 through the air hole 316 is A non-return valve 317 is mounted which regulates the inflow.
The check valve 317 is cantilevered on the inside of the operation main body portion 310 and includes a valve main body 318 that openably closes the air hole 316 from the rear. The valve body 318 is elastically deformable centering on the cantilevered portion, and is seated so as to be separated from the rear with respect to the front wall portion of the seal member 311.

  As shown in FIG. 19, on the outer peripheral surface of the operation main body 310, the portion from the portion located behind the seal member 311 to the rear end of the operation main body 310 is directed radially outward of the operation main body 310. A pair of locking ribs 313 projecting in the longitudinal direction and extending in the front-rear direction are formed. The pair of locking ribs 313 is arranged to face in the radial direction across the central axis O2. In the illustrated example, the pair of locking ribs 313 are arranged in the left-right direction.

The knob portion 312 is formed in, for example, a ring shape whose central axis is disposed along the left-right direction, and has a shape that is easy to operate with a fingertip or the like. However, the shape of the knob portion 312 is not limited to the ring shape, and may be designed freely.
Most of the knob 312 is exposed to the outside of the cover 55 through the opening 55 a formed in the cover 55. Thereby, it is possible to operate the operation member 300 from the outside of the cover body 55 via the knob portion 312. A part of the knob 312 is in contact with the connecting ring 292 from the rear side.

The holding cylinder 301 is disposed coaxially with the central axis O 2, and is fitted to the inside of the portion of the inner plunger cylinder 285 that protrudes rearward with respect to the outer plunger cylinder 275. At this time, the holding cylinder 301 is fixed to the inner plunger cylinder 285 in a state in which the retaining cylinder 301 is prevented from coming off rearward.
The inner diameter of the holding cylinder 301 is formed larger than the outer diameter of the operation main body 310. Specifically, the inner diameter of the holding cylinder 301 is set to such a size that the pair of locking ribs 313 does not contact the inner circumferential surface of the holding cylinder 301 when the operation member 300 is rotated about the central axis O2. There is.

At the front end portion of the holding cylinder 301, an annular locking ring 302 which protrudes toward the inner side in the radial direction of the holding cylinder 301 and surrounds the operation main body portion 310 is formed. The locking ring 302 is formed with a pair of passage grooves (not shown) that allows the pair of locking ribs 313 to move in the front-rear direction.
As a result, when the operation member 300 is moved backward with respect to the storage plunger 223, the pair of locking ribs 313 can be moved further rearward than the locking ring 302 through the passage groove. Therefore, the operation member 300 can be moved rearward without being affected by the locking ring 302.

  Then, after the operating member 300 is moved backward with respect to the storage plunger 223, as shown in FIG. 20, for example, when the operating member 300 is rotated 90 degrees around the central axis O2, the pair of locking ribs 313 Since the front end edge of the pair of locking ribs 313 is brought into contact with the locking ring 302 from behind and locked, since it moves to a position offset in the circumferential direction with respect to the pair of passage grooves. Thus, the forward movement of the operation member 300 can be restricted, and the space S5 can be maintained under negative pressure.

  The positions of the storage plunger 223 and the negative pressure plunger 224 when the front end surface of the outer closed wall 276 is in contact with the rear end surface of the base 266 as shown in FIGS. In this case, most of the liquid is not stored in the storage cylinder 221, and the communication between the storage cylinder 221 and the communication hole 243 is shut off.

  On the other hand, as shown in FIG. 21, the storage plunger 223 and the negative pressure plunger 224 move rearward, and the sixth lip 293 approaches the cover 55 from the front, and the fourth lip 277 does not. The positions of the storage plunger 223 and the negative pressure plunger 224 when the communication groove 248 is reached are taken as the last retracted position. In this case, the storage cylinder 221 contains the maximum amount of liquid.

As shown in FIGS. 17 to 19, the injection cylinder 11 of the present embodiment protrudes forward from the front wall 240 of the storage cylinder 221 and transfers the liquid in the vertical supply cylinder 10 to the ejection holes 4. I am leading.
The injection cylinder 11 is disposed such that the central axis is located below the central axis O2 of the storage cylinder 221. The inside of the injection cylinder portion 11 communicates with the inside of the vertical supply cylinder portion 10 through the communication hole 243, the storage cylinder 221, the supply hole 247 and the connection cylinder portion 230.

  Further, in the present embodiment, the storage valve 265, the suction valve 36, the trigger portion 51, the main piston 52, the main cylinder 53, and the elastic plate portion 54 longitudinally supply the liquid by swinging the trigger portion 51 rearward. A trigger mechanism 50 is made to flow from inside the injection cylinder 10 to the injection hole 4 through the injection cylinder 11.

  Further, in the present embodiment, the first through hole 66 is in communication with a space located between the seal cylinder 12 e and the suction valve 36 in the inner cylinder 13 through the second through hole 67. Thus, the inside of the main cylinder 53 communicates with the space located between the seal cylinder 12 e 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 the communication between the inside of the container A and the inside of the main cylinder 53 and the interruption thereof.

Further, as shown in FIG. 19, the nozzle member 3 according to the present embodiment protrudes from the nozzle plate 330 rearwardly from the nozzle plate 330 covering the front end opening of the injection cylinder 11 from the front, On the other hand, a mounting tube 331 closely fitted to the outside, a regulation wall 332 protruding downward from the mounting tube 331, and a nozzle plate 330, which protrudes rearward from the nozzle plate 330, and is inserted into the injection cylinder 11 A portion 333, a nozzle shaft portion 334 protruding forward from the nozzle plate 330, and a surrounding tube 335 protruding forward from the nozzle plate 330 and surrounding the nozzle shaft portion 334 from the outside are provided.
The nozzle member 3 is mounted on the ejector main body 2 via the mounting cylinder 331 in a state where the nozzle member 3 is disposed on the front side of the ejector main body 2.

  Connection holes 336 are formed in the nozzle plate 330. The connection hole 336 is disposed inside the mounting cylinder 331 in a plan view when the nozzle plate 330 is viewed in the front-rear direction. The lower end portion of the restriction wall 332 abuts on the upper end portion of the main plate member 80 of the trigger portion 51 from the front, thereby positioning the trigger portion 51 in the most forward rocking position.

  The insertion portion 333 is inserted from the front over substantially the entire length in the front-rear direction in the injection cylinder portion 11. At this time, the insertion portion 333 is inserted into the injection cylinder 11 so as to secure a slight gap S3 in the upper part of the internal space of the injection cylinder 11. Thereby, the space volume in the injection | emission cylinder part 11 can be made small. The gap S3 is in communication with the connection hole 336.

  The nozzle shaft portion 334 is disposed such that the central axis is located slightly above the central axis O 2 of the storage cylinder 221. The surrounding tube 335 slightly protrudes forward of the nozzle shaft 334. An annular flow passage 337 communicating with the connection hole 336 is formed between the nozzle shaft portion 334 and the surrounding cylinder 335.

  The nozzle cap 338 in which the ejection holes 4 are formed is attached to the nozzle shaft portion 334, and the flow passage 337 and the ejection holes 4 communicate with each other. Thus, the inside of the storage cylinder 221 is in communication with the jet hole 4 through the communication hole 243, the inside of the injection cylinder 11, the connection hole 336 and the flow passage 337. That is, the communication hole 243 communicates the inside of the storage cylinder 221 with the ejection hole 4.

(Function of trigger type liquid jet)
The case where continuous injection is performed using the trigger type liquid ejector 220 comprised as mentioned above is demonstrated.

In this case, as shown in FIG. 20, the operation member 300 is moved backward with respect to the storage plunger 223 using the knob 312. As a result, a space S5 can be formed between the inner plunger 271 and the operation member 300 under negative pressure. Therefore, the negative pressure in the space S5 can be applied to the closed space S6 in the negative pressure cylinder 222 via the communication passage 321.
Therefore, even if outside air intrudes into the enclosed space S6, the outside air can be exhausted to the space S5 to decompress the inside of the enclosed space S6. Therefore, when the storage plunger 223 and the negative pressure plunger 224 move backward, the closed space S6 can be reliably brought into a negative pressure state.

  Since the pressure receiving area of the negative pressure plunger 224 is set larger than the pressure receiving area of the operation member 300, even if the space S5 is depressurized (negative pressure), the negative pressure plunger 224 is negatively It is possible to prevent rearward movement of the pressure cylinder 222. Therefore, it is possible to prevent the storage plunger 223 from moving rearward together with the negative pressure plunger 224 before operating the trigger portion 51.

  Further, after moving the operating member 300 backward, the operating member 300 is subsequently rotated, for example, 90 degrees around the central axis O2. Thereby, the front end portions of the pair of locking ribs 313 can be locked from behind with respect to the locking ring 302. Therefore, forward movement of the operation member 300 with respect to the storage plunger 223 can be restricted, and the space S5 can be maintained in a negative pressure state.

  Next, as shown in FIG. 21, the trigger portion 51 is pulled backward against the biasing force of the elastic plate portion 54. Then, in the case of the present embodiment, the liquid introduced from the main cylinder 53 into the inner cylinder 13 pushes down the suction valve 36 to close the valve, and is supplied to the supply hole 247 through the connection cylindrical portion 230, The valve body portion 267 of 265 is pushed up to open the valve.

Thereby, the liquid can be introduced into the storage cylinder 221. Specifically, in the storage cylinder 221, in the space portion S4 defined by the front wall portion 240, the storage cylinder cylinder 241, and the portion of the storage plunger 223 located forward of the fourth lip portion 277. Liquid can be introduced. Therefore, the storage plunger 223 and the negative pressure plunger 224 can be integrally moved rearward from the most advanced position.
In the initial stage when the liquid begins to be introduced into the storage cylinder 221, the liquid enters the recessed groove 280. Therefore, it is easy to move the storage plunger 223 and the negative pressure plunger 224 rearward.

  By moving the storage plunger 223 and the negative pressure plunger 224 backward, the communication hole 243 can be opened by separating the front end surface of the outer closing wall 276 from the rear end surface of the base 266. Therefore, the liquid can be introduced to the ejection hole 4 through the communication hole 243, the inside of the injection cylinder 11, the connection hole 336 and the flow passage 337, and the liquid can be ejected forward from the ejection hole 4.

  Therefore, each time the trigger portion 51 is pulled backward, the liquid can be jetted from the ejection hole 4 and the storage plunger 223 and the negative pressure plunger 224 are moved rearward to allow the liquid to be stored in the storage cylinder 221. It can be stored (filled).

  Further, by moving the storage plunger 223 and the negative pressure plunger 224 rearward, the closed space S6 in the negative pressure cylinder 222 becomes negative pressure. Thereby, a biasing force (thrust) directed forward can be applied to the storage plunger 223 and the negative pressure plunger 224.

Thereafter, when the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the supply of the liquid from the connection cylindrical portion 230 into the storage cylinder 221 is stopped, but the negative pressure in the negative pressure cylinder 222 causes the storage plunger The H.223 and negative pressure plungers 224 begin to move forward (return movement toward the other side in the axial direction) integrally toward the most advanced position.
At this time, the outflow of the liquid from the inside of the storage cylinder 221 into the connection cylindrical portion 230 is restricted by the storage valve 265.

Accordingly, the liquid accumulated in the storage cylinder 221 is guided to the ejection hole 4 through the communication hole 243, the inside of the injection cylinder 11, the connection hole 336 and the flow passage 337, and the liquid is continuously ejected forward through the ejection hole 4 be able to.
As described above, the liquid can be jetted not only when the operation of pulling the trigger portion 51 backward but also when the trigger portion 51 is not operated, and the liquid can be continuously jetted.

  Therefore, even in the case of the present embodiment, the liquid can be continuously jetted, and the same effect as that of the first embodiment can be achieved.

In particular, even in the case of the present embodiment, since the closed space S6 in the negative pressure cylinder 222 can be depressurized through the communication passage 321 in advance before continuous injection, when the storage plunger 223 moves backward. The negative pressure can be reliably made in the closed space S6.
Therefore, in the process of continuously injecting the liquid after storing the liquid in the storage cylinder 221, it is possible to suppress the reduction of the thrust directed to the front of the storage plunger 223 from the beginning to the end. Therefore, it is possible to stabilize the ejection state of the liquid and to improve the liquid drainage.

  Further, when the liquid in the storage cylinder 221 is ejected from the ejection holes 4, the outflow of the liquid from the storage cylinder 221 into the connection cylindrical portion 230 can be restricted by the storage valve 265. Therefore, for example, the pressure of the liquid ejected from the ejection holes 4 through the ejection cylinder 11 can be easily increased, and the liquid can be ejected in a suitable form.

In addition, when the storage plunger 223 and the negative pressure plunger 224 are located at the last retracted position, as shown in FIG. 22, the fourth lip 277 of the storage plunger 223 is located on the communication groove 248. At this time, the space portion S4 in the front cylinder portion 245 communicates with the recovery hole 249 through the communication groove 248, so the interior of the storage cylinder 221 and the interior of the container A communicate with each other through the recovery hole 249 and the recovery passage 250.
Therefore, when the liquid is further introduced into the space portion S4 of the storage cylinder 221 after the storage plunger 223 and the negative pressure plunger 224 finally reach the retracted position, the liquid is stored in the container through the recovery hole 249 and the recovery passage 250. It can be put back in the body A. Thereby, the pressure in the storage cylinder 221 can be suppressed from becoming excessively high.

In addition, as shown in FIGS. 17 to 19, the storage cylinder 221 is provided with a communication hole 243 communicating with the ejection hole 4 and a supply hole 247 communicating with the inside of the injection cylinder portion 11. Directly closes the communication hole 243. Therefore, the space volume (the internal volume occupied by the path) of the path from the connection cylindrical portion 230 to the storage cylinder 221 can be reduced easily and easily.
Therefore, when the trigger portion 51 is operated, the liquid can be immediately introduced into the storage cylinder 221 from the inside of the connection cylinder portion 230, and the pressure in the storage cylinder 221 can be rapidly increased, and the storage plunger 223 and the negative pressure plunger It is easy to move the 224 back immediately. Therefore, since the liquid can be ejected promptly while suppressing the number of times of priming, usability is improved and operability can be improved.

  Moreover, since the space volume in the injection | emission cylinder part 11 is small by the insertion part 333, the pressure in the injection | emission cylinder part 11 can be raised promptly, and a liquid can be injected by high injection pressure.

  Further, since the storage plunger 223 directly closes the communication hole 243, the liquid is not jetted unless the internal pressure of the storage cylinder 221 exceeds a predetermined value. Therefore, the liquid can be ejected at an appropriate pressure (injection pressure) without separately providing a high pressure valve or the like, and the configuration can be easily simplified. In addition, it is possible to effectively suppress liquid leakage from the jet holes 4 when not in use.

In the present embodiment, even when the continuous ejection is completed and the storage plunger 223 returns to the most advanced position, as shown in FIG. 20, negative pressure is generated between the storage plunger 223 and the operation member 300. The space S5 is still formed. Therefore, finally, after the operation member 300 is reversely rotated about the central axis O2, the operation member 300 is moved forward with respect to the storage plunger 223, and the seal member 311 is brought into contact with the inner closing wall 286 from behind. .
Thus, the operation member 300 can be returned to the original position, and the pressure (air) in the space S5 can be discharged to the outside through the check valve 317.

Fifth Embodiment
Next, a fifth embodiment of a trigger type liquid ejector according to the present invention will be described with reference to the drawings.
In the fifth embodiment, the same parts as those in the fourth embodiment are indicated by the same reference numerals and the description thereof will be omitted.

  As shown in FIG. 23, in the trigger type liquid ejector 350 of the present embodiment, the operation member 360 is configured to always define the space portion S5 with the inner plunger 271.

In the operation member 360, an operation cap 361 is integrally connected to a rear end portion of the operation main body portion 310, instead of the knob portion 312 shown in the fourth embodiment.
The operation cap 361 protrudes forward from an outer peripheral edge of the cap wall 362 and an annular cap wall 362 protruding outward in the radial direction of the storage cylinder 221 from the rear end of the operation main body 310. And a cap cylinder 363 disposed outside the cylinder 290, and disposed coaxially with the central axis O2.
The operation cap 361 is disposed inside the opening 55 a of the cover 55, and most of the operation cap 361 is exposed to the outside of the cover 55.

The operation main body portion 310 is disposed in a state in which the inside of the ring member 370 fixed to the inner plunger 271 is movably inserted in the front-rear direction.
The ring member 370 is fitted to a portion of the inner plunger cylinder 285 that protrudes rearward with respect to the outer plunger cylinder 275, and is disposed coaxially with the central axis O2. The inner diameter of the ring member 370 is formed slightly larger than the outer diameter of the operation main body 310 and the outer diameter of the peripheral wall of the seal member 311. Thus, the operation member 360 is movable in the front-rear direction without being influenced by the ring member 370.

  At the inner peripheral edge portion of the ring member 370, a locking cylindrical portion 370a that protrudes forward is formed. The outer diameter of the locking cylinder 370a is smaller than the inner diameter of the inner plunger cylinder 285, and an annular space is defined between the locking cylinder 370a and the inner plunger cylinder 285.

  The operation main body portion 310 is disposed in a state of being shifted rearward as compared with the fourth embodiment, and protrudes rearward with respect to the cover body 55 through the opening 55 a. Thus, the seal member 311 is disposed in a state of being largely separated rearward from the inner closing wall 286 of the inner plunger 271. Therefore, a space S5 is secured between the operation member 360 and the inner plunger 271.

The seal member 311 is in contact with the locking cylinder 370 a formed on the ring member 370 from the front. Specifically, a base end 314 which is a root portion of the seventh lip 315 is in contact with the locking cylinder 370 a from the front. The proximal end 314 is annularly formed so as to protrude radially outward from the peripheral wall of the seal member 311, and the seventh lip 315 extends rearward from the outer peripheral edge of the proximal end 314. Is formed.
It should be noted that the seventh lip portion 315 is close to the inner circumferential surface of the inner plunger cylinder 285 in a state of entering from the front into the annular space defined between the locking cylinder 370 a and the inner plunger cylinder 285. It is in sliding contact with
As described above, the proximal end portion 314 is in contact with the locking cylindrical portion 370a from the front, whereby the operation member 360 is prevented from coming off rearward.

  The cap cylinder 363 is combined with the negative pressure plunger cylinder 290 from the rear, and is disposed outside the negative pressure plunger cylinder 290. The cap cylinder 363 is disposed rearward with a gap from the negative pressure plunger wall 291. The clearance is equal to the clearance in the front-rear direction between the inner closing wall 286 of the inner plunger 271 and the seal member 311. Therefore, it is possible to move the operation member 360 forward with respect to the storage plunger 223 by the amount of these gaps.

Between the cap wall 362 and the ring member 370, a coil spring 371 coaxially disposed with the central axis O2 is disposed in a compressed state. The coil spring 371 is disposed so as to cover the operation main body portion 310, and biases the operation member 360 rearward with respect to the storage plunger 223.
Thus, the operating member 360 is always urged rearward, and the space S5 is secured between the operating member 360 and the inner plunger 271 as described above.
The coil spring 371 and the ring member 370 may be integrally formed instead of separate members.

(Function of trigger type liquid jet)
In the case of the trigger type liquid ejector 350 configured as described above, the operation method of the operation member 360 when making the space S 5 negative pressure is different from that of the fourth embodiment as in the fourth embodiment. The effects and effects of

  In the case of the present embodiment, when making the space S 5 negative pressure, as shown in FIG. 24, for example, the operation member 360 is pushed forward via the operation cap 361 with a force against the coil spring 371 and stored. The entire operation member 360 is moved forward with respect to the plunger 223. Thus, the pressure (air) in the space S5 can be temporarily discharged to the outside through the check valve 317.

  When the forward movement of the operation member 360 is released, the operation member 360 is pushed back by the restoring force of the coil spring 371, so as shown in FIG. 23, it moves backward with respect to the storage plunger 223 and returns to the original position. Do. In this process, the space S5 can be made negative pressure, and the negative pressure in the space S5 can be made to act on the closed space S6 in the negative pressure cylinder 222 via the communication passage 321.

  Therefore, even if outside air intrudes into the enclosed space S6, the outside air can be exhausted to the space S5 to decompress the inside of the enclosed space S6. Therefore, when the storage plunger 223 and the negative pressure plunger 224 move backward, the closed space S6 can be reliably brought into a negative pressure state.

Therefore, in the present embodiment, as in the fourth embodiment, the liquid can be continuously jetted.
In particular, since the space S5 can be made negative pressure by a simple operation (one-touch operation) of only moving the operation member 360 forward, operability can be improved.

Further, in the case of the present embodiment, in order to always define the space portion S5 between the inner plunger 271 and the operation member 360, the operation member 360 is biased rearward by the coil spring 371. . Therefore, the operating member 360 is shifted rearward (a large part of the operating cap 361 is the opening 55a of the cover 55) except when moving the operating member 360 forward to make the space S5 negative pressure. Is exposed to the outside), and this position is taken as a standby position.
Therefore, for example, when not in use, during storage, and during use, the shape of the trigger type liquid ejector 350 does not easily change, and a certain appearance can be easily maintained. Thus, the design and design of the trigger type liquid jet device 350 can be easily improved.

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

  For example, in each of the above embodiments, a mechanism for locking the operation of the trigger unit 51 or a switching member for switching the ejection mode (for example, mist, foam, etc.) of the liquid may be provided in front of the ejection holes 4. Absent.

  Further, in each of the above embodiments, the trigger unit 51 is pivotable to the rear, but it is possible to appropriately adopt a form in which the trigger unit 51 moves to the rear. For example, the trigger unit 51 may be slidably moved rearward.

  Furthermore, in each of the above-described embodiments, the negative pressure plunger 93 and the storage plunger 91 can be obtained by utilizing the negative pressure in the negative pressure cylinder 94 without utilizing the urging force acting from other members such as the urging member. Although the restoration is performed, the present invention is not limited to this case. For example, in addition to the negative pressure in the negative pressure cylinder 94, the negative pressure plunger 93 and the storage plunger 91 can be obtained by utilizing the biasing force acting on the negative pressure plunger 93 and the storage plunger 91 from an biasing member such as a metal spring. It may be restored and moved.

A ... container body 1, 170, 200, 220, 350 ... trigger type liquid jet device 2 ... jet body 3 ... nozzle member 4 ... jet hole 10 ... vertical supply cylindrical portion 11 ... injection cylindrical portion 50 ... trigger mechanism 51 ... trigger Portion 90, 221: Storage cylinder 91, 223: Storage plunger 93, 224: Negative pressure plunger 94, 222: Negative pressure cylinder 115a: First lip portion (lip portion) of the storage plunger
DESCRIPTION OF SYMBOLS 131 ... Surrounding cylinder part 135 ... Guide surface 150, 171, 201, 300, 360 ... Operation member 153 ... Projected part of operation member 155 ... Guided protrusion 160 ... Communication hole 161 ... Communication path

Claims (4)

An ejector body attached to a container containing a liquid;
And a nozzle member disposed on the front side of the jet body and having a jet hole formed to jet liquid forward.
The spout body is
A vertical supply tube extending vertically and sucking up the liquid in the container body;
An injection cylinder disposed in front of the vertical supply cylinder and guiding the liquid in the vertical supply cylinder to the ejection hole;
A trigger unit is provided forwardly movably in the front biasing state forward of the vertical supply cylinder, and the liquid is transferred from the inside of the vertical supply cylinder by the movement of the trigger unit to the rear inside the injection cylinder. A trigger mechanism for circulating toward the ejection hole side through the
A storage cylinder to which the liquid having passed through the inside of the vertical supply cylinder part is supplied to the inside by the backward movement of the trigger part;
It is disposed in the storage cylinder so as to be movable in the axial direction along the central axis of the storage cylinder, and moves toward one side in the axial direction as the liquid is supplied into the storage cylinder, and the axial direction A cylindrical storage plunger whose other end opening is closed,
A negative pressure plunger coupled to the storage plunger and associated with the axial movement of the storage plunger;
A negative pressure cylinder extending along the axial direction and closed at the other end opening in the axial direction, and in which the negative pressure plunger is accommodated movably toward one side in the axial direction;
An operation member slidably movable in the axial direction and closely fitted to the storage plunger in the storage plunger;
The negative pressure cylinder includes a communication passage communicating a portion located on the other side in the axial direction with respect to the negative pressure plunger and a portion located between the storage plunger and the operation member. A trigger type liquid ejector characterized by In the trigger type liquid ejector according to claim 1,
The pressure receiving area of the negative pressure plunger is larger than the pressure receiving area of the operation member. In the trigger type liquid ejector according to claim 1 or 2,
The storage plunger is formed with a lip portion in close sliding contact with the inner circumferential surface of the storage cylinder,
The communication passage is formed in a portion of the storage plunger located on one side in the axial direction with respect to the lip portion, and the negative pressure cylinder is formed through a communication hole formed to penetrate the storage plunger. A trigger type liquid jet device characterized in that a portion located on the other side in the axial direction with respect to the negative pressure plunger in the inside is communicated with a portion located between the storage plunger and the operation member. . The trigger type liquid ejector according to any one of claims 1 to 3,
The operation member is fitted in the storage plunger so as to be rotatable about the central axis, and has a protrusion which protrudes to one side in the axial direction with respect to the storage plunger.
It has a surrounding cylinder part fixed to the negative pressure cylinder and surrounding the projecting part from the outside,
On the inner circumferential surface of the surrounding tube portion, the operating member is moved toward one side in the axial direction with respect to the storage plunger along with the rotational movement of the operating member around the central axis line, A trigger type liquid jet device characterized in that a guide surface for sliding a guided protrusion formed on the protrusion is formed.

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