JP6511385B2 - 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. A nozzle member having a hole formed therein, wherein the sprayer body extends in the vertical direction and extends forward from the vertical supply cylinder and a vertical supply cylinder that sucks up the liquid in the container body An injection cylinder portion provided inside and communicating with the inside of the vertical supply cylinder portion; and a trigger portion extending downward from the injection cylinder portion and movably disposed rearward in a forward biased state. And a trigger mechanism for introducing a liquid from the inside of the vertical supply cylinder into the injection cylinder by the backward movement of the trigger, and for ejecting the liquid from the inside of the injection cylinder toward the ejection hole. It is a trigger type liquid ejector, The said ejector main body A storage cylinder, the inside of which is in communication with the inside of the vertical supply cylinder through the supply hole, and is movably disposed in the storage cylinder axially along the central axis of the storage cylinder for storing liquid, into the storage cylinder A storage plunger moving toward one side in the axial direction with storage of liquid, a negative pressure plunger connected to the storage plunger and linked to the axial movement of the storage plunger, the axial direction A negative pressure cylinder in which communication between the opening located on the other side in the axial direction and the outside is interrupted and the negative pressure plunger is movably accommodated toward one side in the axial direction And.

According to the present invention, the trigger portion is pulled backward in a state of being attached to the container body containing the liquid, and the liquid in the container body sucked up through the inside of the vertical supply cylinder can be introduced into the injection cylinder, and Liquid can be introduced into the storage cylinder from within the vertical supply tube. Thus, the liquid introduced into the storage cylinder can be jetted to the outside through the ejection holes, and at the same time, the liquid can be gradually stored in the storage cylinder. When the liquid is stored in the storage cylinder, the storage plunger is moved toward one side in the axial direction accordingly, and the negative pressure plunger connected to the storage plunger is in the axial direction in the negative pressure cylinder. Move towards In the negative pressure cylinder, the communication between the opening located on the other side in the axial direction and the outside is shut off. Therefore, a portion of the negative pressure cylinder located on the other side in the axial direction with respect to the negative pressure plunger is a sealed space It is assumed. Therefore, when the negative pressure plunger moves to one side in the axial direction, the enclosed space becomes negative pressure. Thereby, an urging force directed to the other side in the axial direction can be generated 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 to pull the trigger part is stopped, the supply of the liquid into the vertical supply part is stopped, but the negative pressure plunger and the storage plunger are integrally directed toward the other side in the axial direction by the negative pressure in the negative pressure cylinder. I'm starting to move back. As a result, the liquid filled in the storage cylinder can be pushed out of the storage cylinder via the supply hole and the vertical supply cylinder into the injection cylinder, and can be continuously jetted from the ejection hole.
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.

In particular, since the storage cylinder communicates with the inside of the vertical supply cylinder, it is easy to store the liquid from the inside of the vertical supply cylinder early (immediately) in the storage cylinder. Therefore, since it is possible to sufficiently store the liquid in the storage cylinder with the operation of the small trigger part, it is possible to switch to the continuous injection of the liquid early and it is easy to use.
In addition, since the negative pressure plunger and the storage plunger are integrally restored and moved using the negative pressure generated in the negative pressure cylinder, a general restoration movement method using a metal part such as a coil spring (see Unlike the biasing member), it is possible to prevent an excessive load (load) from acting on each component except at the time of operation (during liquid injection). Therefore, it is possible to suppress, for example, the occurrence of liquid leakage caused by cracking or elongation in each component. Furthermore, when metal parts such as coil springs are used, the environmental load is large at the time of disposal due to the use of the metal material, and the cost tends to be high. On the other hand, in the present invention using 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 be suppressed.

  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 stored in the storage cylinder.

(2) The pressure receiving area of the negative pressure plunger may be 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. can do. 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 cylinder and the negative pressure cylinder may be arranged in parallel with each other.

  In this case, since the entire length of the trigger type liquid jet can be shortened because the storage cylinder and the negative pressure cylinder are arranged in parallel to each other, downsizing can be easily achieved.

(4) The storage cylinder and the negative pressure cylinder may extend rearward from the vertical supply cylinder and may be arranged in parallel in the vertical direction.

  In this case, the vertical bulking can be further suppressed.

(5) The storage cylinder is extended rearward from the vertical supply cylinder, and a rear end opening of the injection cylinder is formed in front of the supply hole, and The front end portion may be provided with a projecting valve that protrudes forward through the supply hole and closes the rear end opening of the injection cylindrical portion so as to be openable from the rear.

In this case, when the liquid is introduced into the storage cylinder from the inside of the vertical supply cylinder through the supply hole by the operation of the trigger unit, the storage plunger moves to one side in the axial direction. Open the rear end opening. Thus, the liquid can be ejected from the ejection holes, and the liquid can be stored in the storage cylinder.
Then, when performing continuous injection of the liquid stored in the storage cylinder, the storage plunger moves to the other side in the axial direction along with the injection, so the projection valve closes the rear end opening of the injection cylinder from behind . As a result, it is possible to prevent the liquid from being introduced into the injection cylinder further, so that it is possible to stop the continuous injection promptly and to improve the liquid shortage.

  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 embodiment of the trigger type liquid ejector which concerns on this invention. It is the longitudinal cross-sectional view which expanded the part located in the front side rather than the vertical supply cylinder part in the trigger type liquid ejector shown in FIG. It is the longitudinal cross-sectional view which expanded the part located in the back side rather than the vertical supply cylinder part in the trigger type liquid ejector shown in FIG. It is the longitudinal cross-sectional view which expanded the front-end | tip part side of the negative pressure plunger shown in FIG. It is a longitudinal cross-sectional view which shows the state which pulled the trigger part shown in FIG. 1 back.

Hereinafter, an 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 jet device 1 of the present embodiment is mounted on a container A for containing a liquid (not shown), and the jet device main body 2 having a vertical supply tubular portion 10 for sucking up the liquid; The hole 4 is formed, and the nozzle member 3 attached to the jet body 2 is provided.
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 is referred to as the lower side along the axis O1, and the opposite side is referred to as the upper side. Further, one direction orthogonal to the axis O1 is referred to as the front-rear direction, and a direction orthogonal to both the axis O1 and the front-rear direction is referred to as the left-right direction.

As shown in FIGS. 1 and 2, the jet body 2 is extended along the central axis O2 along the longitudinal direction from the longitudinal supply cylindrical portion 10 extending in the vertical direction and the longitudinal supply cylindrical portion 10, and the inside And the injection | pouring cylinder part 11 connected to the inside of the vertical supply cylinder part 10, and are formed in L shape by the side view seen from the left-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.

The small diameter portion 13b of the inner cylinder 13 is fitted with the upper portion of the pipe 15 which is disposed in the container body A and whose lower end opening is located at the bottom portion (not shown) of the container body A. 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 mouth A 1 of the container A.
In addition, the axis line O1 of the vertical supply cylindrical portion 10 configured by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the container axis of the container body A.

  The rear end portion of the injection cylinder portion 11 is connected to the front side of the upper end portion of the vertical supply cylinder portion 10. At this time, the inside of the injection cylinder 11 communicates with the inside of the vertical supply cylinder 10 through the outer discharge hole 16 formed in the outer cylinder 12 and the 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, for example, closely abuts on the valve seat 32. Thus, the valve body 33 shuts off communication between the space in the inner cylinder 13 located above the valve seat 32 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 toward the front, and partially formed integrally with the flange portion 12 c of the outer cylinder 12.

  The ejector body 2 extends downward from the injection cylinder 11, and is interlocked with the trigger 51 disposed so as to be pivotable (movable) backward in the forward biasing state and the pivoting of the trigger 51. A main piston 52 moving in the front-rear direction, a main cylinder 53 the inside of which is pressurized and depressurized with the movement of the main piston 52, an elastic plate portion 54 urging the trigger portion 51 forward, and a vertical supply cylindrical portion 10 And a cover 55 that covers the whole of the injection cylinder 11, the storage cylinder 121 and the negative pressure cylinder 123, which will be described later, from at least 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 inside of the piston guide 62 is opened to the rear, and in this opening, the fitting projection 41 provided to project forward from the rear wall (small diameter portion 12b of the outer cylinder 12) of the cylinder portion 40 for cylinder 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 abut, for example, closely 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 is formed in a portion located above the piston guide 62. The first through hole 66 is in communication with the space between the discharge valve 30 and the suction valve 36 through a second through hole 67 formed in the inner cylinder 13 of the vertical supply cylinder 10.
Thus, the inside of the main cylinder 53 communicates with the space 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 the communication between the inside of the injection cylinder 11 and the inside of the main cylinder 53 and the interruption 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 interruption 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

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

  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 83 is rotatably supported by a bearing (not shown) provided on the upper plate member 84 covering the upper side of the injection cylinder 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 part are mutually connected.

  The connecting portion 70 of the main piston 52 is rotatable around the connecting shaft 86, and is connected movably 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.

A horizontal plate-shaped upper plate member 84 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 both left and right sides of the upper plate member 84, the elastic plate portions 54 which are formed in a convex arc shape forward in a side view from the left and right direction and which extends to the lower side of the injection cylinder portion 11 are integrally formed. 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 of the elastic plate portion 54 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 closing member 90 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.

Furthermore, in the present embodiment, the jet body 2 includes the closing member 90 mounted from the front side with respect to the injection cylinder 11.
The closing member 90 is located on the front side of the front end opening of the injection cylinder 11, and extends backward from the opposite plate 91 and the opposite plate 91 disposed opposite to the front opening. The first cylindrical portion 92 externally fitted to the portion 11, the second cylindrical portion 93 extending forward from the counter plate portion 91, and the second cylindrical portion 93 are located inside of the second cylindrical portion 93 and forward from the counter plate portion 91 And a support shaft 94 extending toward the end.

  The support shaft portion 94 is formed to fit inside the second cylindrical portion 93 without protruding forward of the second cylindrical portion 93. Further, the lower end portion of the closing member 90 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 as described above. .

  The second cylindrical portion 93 and the support shaft portion 94 are disposed at a position eccentric downward with respect to the central axis O 2 of the injection cylindrical portion 11. An injection hole 95 communicating with the front end opening of the injection cylinder 11 is formed in a portion of the opposing plate 91 located above the support shaft 94 and inside the second cylinder 93. There is. Thus, the inside of the second cylindrical portion 93 is in communication with the inside of the injection cylindrical portion 11 through the injection hole 95.

  On the outer peripheral surface of the support shaft portion 94, a first groove portion 96 which extends linearly along the front-rear direction and is opened forward is formed. In the illustrated example, two first groove portions 96 are formed at equal intervals in the circumferential direction. However, the number of first groove portions 96 is not limited to two, and one or three or more may be formed.

The nozzle member 3 is attached to the second cylindrical portion 93 of the closing member 90 so as to be combined with the jet body 2.
The nozzle member 3 is disposed in front of the support shaft 94 of the closing member 90 and extends rearward from the nozzle wall 100 in which the ejection holes 4 are formed, and the nozzle wall 100 to the second cylindrical portion 93. And an externally fitted cylindrical portion 101 externally fitted from the front. By mounting the externally fitted cylindrical portion 101 to the second cylindrical portion 93, the nozzle member 3 and the jet body 2 are combined as described above.
The externally fitted cylindrical portion 101 is rotatably attached to the second cylindrical portion 93 in a state in which it is prevented from coming off. That is, the nozzle member 3 is capable of reciprocating and rotating around the axis of the second cylindrical portion 93.

The nozzle wall portion 100 is supported by the support shaft portion 94 by extending backward from a portion positioned inside the outer fitting cylindrical portion 101 and being externally fitted rotatably with respect to the support shaft portion 94. The supported cylindrical portion 102 is formed.
On the inner circumferential surface of the supported cylindrical portion 102, a second groove portion 103 which extends linearly along the front-rear direction and is opened rearward is formed. In the illustrated example, two second groove portions 103 are formed around the axis of the supported cylindrical portion 102 at intervals. The second groove portions 103 are formed in such a manner that the positions in the circumferential direction coincide with the first groove portions 96 formed in the support shaft portion 94, and are in communication with the first groove portions 96.

  A spin circuit (spin groove) 104 is formed on the rear surface of the nozzle wall 100 to communicate the second groove portion 103 with the ejection hole 4. The rotation circuit 104 guides the liquid having the spin applied thereto to the ejection holes 4 by causing the liquid from the second groove 103 to spin around the axis of the support shaft 94.

  The first groove portion 96 and the second groove portion 103 are switched between communication and non-communication by reciprocally rotating the nozzle member 3 about the axis of the second cylindrical portion 93. That is, the first groove 96 and the second groove 103 are in communication only when the nozzle member 3 is positioned at a predetermined rotational position along the axis of the second cylindrical portion 93, and in the other rotational positions, they are not in communication. It becomes a state. Thus, by turning the nozzle member 3 back and forth around the axis of the second cylindrical portion 93, it is possible to switch ON-OFF of the liquid ejection operation.

  Between the second cylindrical portion 93 of the closing member 90 and the supported cylindrical portion 102 of the nozzle member 3, an annular passage space S3 is formed which allows the injection hole 95 and the second groove portion 103 to communicate with each other. Thus, as described above, when the first groove 96 and the second groove 103 communicate with each other, the inside of the injection cylinder 11 and the ejection hole 4 form the injection hole 95, the passage space S3, the first groove 96, the second The grooves 103 and the rotation circuit 104 communicate with each other.

The nozzle wall portion 100 is formed with a seal cylindrical portion 105 extending rearward from a portion positioned between the supported cylindrical portion 102 and the outer cylindrical portion and closely contacting the inside of the second cylindrical portion 93. There is.
Further, the cross-sectional area of each of the injection holes 95 and the passage space S3 is larger than the cross-sectional area of the introduction passage 106 formed of the first groove 96 and the second groove 103.

A switching plate 110 is attached to the nozzle member 3 for switching the ejection form of the liquid to a bubble shape.
The switching plate 110 is attached so as to be able to open and close around a shaft portion 111 extending in the left-right direction. In the illustrated example, the shaft 111 is disposed on the front side of the upper end of the nozzle wall 100. In addition, in the switching plate 110, a foam hole 112 is formed in a portion located in front of the jet hole 4.
Thus, when the switching plate 110 is used, it is possible to mix the liquid jetted from the jetting hole 4 and the outside air between the jetting hole 4 and the switching plate 110 to form a foam. . However, the switching plate 110 is not essential and may not be provided.

  Furthermore, as shown in FIG. 1 and FIG. 3, the jet injector main body 2 according to the present embodiment communicates with the inside of the vertical supply cylindrical portion 10 through the supply holes 120 and stores the liquid therein; , A negative pressure cylinder 123 provided parallel to the storage plunger 122, and a negative pressure plunger 124 housed in the negative pressure cylinder 123.

The storage cylinder 121 is disposed on the rear side of the vertical supply cylindrical portion 10, and extends rearward from the upper end portion side of the small diameter portion 12b of the outer cylinder 12 constituting the vertical supply cylindrical portion 10. At this time, the storage cylinder 121 is disposed coaxially with the central axis O2 of the injection cylinder 11, and is arranged in the front-rear direction with the injection cylinder 11 with the vertical supply cylinder 10 interposed therebetween.
The storage cylinder 121 is formed to have a diameter larger than the inner diameter of the injection cylinder portion 11 and includes a cylinder cylinder portion 130 opened to the rear. The supply holes 120 are formed to penetrate the inner cylinder 13 and the outer cylinder 12 in the front-rear direction, and are located on the opposite side of the outer discharge holes 16 and the inner discharge holes 17 in the radial direction across the axis O1. It is arranged. Thus, the rear end opening of the injection cylinder 11 is located in front of the supply hole 120.
In the illustrated example, the opening size of the supply hole 120 is equal to the opening size of the outer discharge hole 16 and the inner discharge hole 17.

The storage plunger 122 is disposed coaxially with the central axis O 2 of the injection cylinder 11 in the storage cylinder 121. Specifically, the storage plunger 122 is disposed movably in the storage cylinder 121 in the front-rear direction (axial direction) along the central axis O 2, and is moved rearward (in the axial direction) as the liquid is stored in the storage cylinder 121. Movably housed toward one side).
The storage plunger 122 is integrally formed at the rear end opening of the small diameter cylindrical portion 135 having a diameter smaller than the inner diameter of the cylindrical portion 130 and the small diameter cylindrical portion 135 having a diameter smaller than the inner diameter of the cylindrical portion 130. And a cylindrical sliding cylinder 136 in close sliding contact with the surface.

In the front wall portion of the small diameter cylindrical portion 135, a projection valve 137 which extends forward through the supply hole 120, passes through the vertical supply cylindrical portion 10, and enters the inside of the outer discharge hole 16 and the inner discharge hole 17 from the rear. Is formed. The projection valve 137 is formed in a cylindrical shape coaxially arranged with the central axis O2, and enters the inside of the outer discharge hole 16 and the inside of the inner discharge hole 17 so as to penetrate the hollow spring portion of the discharge valve.
Further, the projecting valve 137 is disengaged rearward from the inside of the outer discharge hole 16 and the inside of the inner discharge hole 17 with the movement of the storage plunger 122 to the rear. Therefore, the rear end opening of the injection cylinder 11 is closed by the projection valve 137 so as to be able to open from the rear.

An annular space portion 138 is formed between the peripheral wall portion of the small diameter cylindrical portion 135 and the cylinder cylindrical portion 130 and communicates with the inside of the supply hole 120. Thereby, it is possible to store the liquid in the storage cylinder 121 by using the space portion 138.
The sliding cylindrical portion 136 is formed at its front end portion with a lip portion 136a whose diameter gradually increases toward the front. The lip portion 136 a is in close sliding contact with the inner peripheral surface of the cylinder portion 130.

  The negative pressure cylinder 123 is disposed on the rear side of the vertical supply cylindrical portion 10 and below the storage cylinder 121, and extends rearward from the small diameter portion 12b of the outer cylinder 12 constituting the vertical supply cylindrical portion 10. Thus, the storage cylinder 121 and the negative pressure cylinder 123 are arranged in parallel in the vertical direction.

The negative pressure cylinder 123 has a cylinder portion 140 extending along a central axis O3 parallel to the central axis O2 of the storage cylinder 121, and a front end opening portion of the cylinder portion 140 (an opening located on the other side in the axial direction) And a front wall portion 141 that closes the rear wall portion, and is formed in a top cylindrical shape that opens rearward.
Then, the negative pressure cylinder 123 is connected to the vertical supply cylindrical portion 10 and the storage cylinder 121 via the plurality of connection pieces 142, and is disposed on the rear side of the vertical supply cylindrical portion 10 and below the storage cylinder 121 It is stably supported by

  In the illustrated example, the connection pieces 142 are provided at three locations, and connect the cylinder cylinder portion 140 of the negative pressure cylinder 123 and the cylinder cylinder portion 130 of the storage cylinder 121, and the outer cylinder in the front wall portion 141 and the vertical supply cylinder portion 10 The small diameter portion 12 b of the cylinder 12 is connected, and the cylinder portion 140 of the negative pressure cylinder 123 and the flange portion 12 c of the outer cylinder 12 of the vertical supply cylindrical portion 10 are connected. However, the number and the position of the connection pieces 142 are not limited to this case.

  The cylinder portion 140 extends rearward so as to have a length equivalent to that of the cylinder portion 130 of the storage cylinder 121. Furthermore, the inner diameter of the cylinder portion 140 is formed larger than the inner diameter of the cylinder portion 130 in the storage cylinder 121. Thus, the pressure receiving area of the negative pressure plunger 124 is set to be larger than the pressure receiving area of the storage plunger 122.

  The negative pressure plunger 124 is accommodated in the negative pressure cylinder 123 in a state of being connected to the storage plunger 122 via the connection member 150, and is disposed coaxially with the central axis O3 of the negative pressure cylinder 123. Thus, the negative pressure plunger 124 is disposed in the negative pressure cylinder 123 so as to be movable in the front-rear direction (axial direction) along the central axis O3 with the movement of the storage plunger 122. That is, the negative pressure plunger 124 moves in coordination with the movement of the storage plunger 122.

  The negative pressure plunger 124 includes a plunger shaft 160 inserted from behind into the negative pressure cylinder 123 and a sliding body 161 attached to the plunger shaft 160.

  The plunger shaft 160 is integrally connected to the front side cylindrical portion 162 whose diameter is smaller than the inner diameter of the negative pressure cylinder 123 and the rear end of the front side cylindrical portion 162, and the outer diameter is larger than the front side cylindrical portion 162 The rear cylindrical portion 163 is formed in a two-stage cylindrical shape.

The front end opening end of the front side cylindrical portion 162 is in contact with the front wall portion 141 of the negative pressure cylinder 123 from the rear. An annular bulging portion 164 slightly bulging outward in the radial direction orthogonal to the central axis O3 is formed on the outer peripheral surface of the front side tubular portion 162 on the front end side.
Furthermore, as shown in FIG. 4, an annular wall 165 is formed inside the front side tubular portion 162 so as to protrude inward in the radial direction orthogonal to the central axis O3. A plurality of longitudinal grooves 166 are formed on the front surface of the annular wall 165 at intervals around the central axis O3.

The rear side cylindrical portion 163 protrudes rearward with respect to the negative pressure cylinder 123, and the rear end portion thereof is disposed inside an opening 55 a formed in the cover body 55.
On the outer peripheral surface of the rear side cylindrical portion 163, a plurality of rib pieces 167 projecting outward in the radial direction orthogonal to the central axis O3 are formed at intervals in the circumferential direction. The rib pieces 167 extend in the front-rear direction and are close to or in contact with the inner circumferential surface of the negative pressure cylinder 123, thereby suppressing rattling of the plunger shaft 160.

  Of the plurality of rib pieces 167, at least the rib piece 167 disposed at the lower side is formed to have a length in the front-rear direction shorter than the other rib pieces 167, and the end edge 167a is associated with the backward movement of the negative pressure plunger 124. The cover body 55 is approached from the front, and finally, is locked in contact with the cover body 55 (see FIG. 5). Thereby, the negative pressure plunger 124 can be further restricted from moving backward.

  Therefore, the rib piece 167 and the cover body 55 function as a restricting member that restricts the rearward movement of the storage plunger 122 and the negative pressure plunger 124.

  As shown in FIG. 4, the sliding body 161 surrounds the connecting cylinder 170 externally fitted to the front side cylindrical portion 162 from the front and the connecting cylinder 170 from the outside in the radial direction, and the inner periphery of the cylinder cylinder 140 The sliding cylinder 171 slidingly contacts the surface, the front end of the connecting cylinder 170 and the front end of the sliding cylinder 171 are connected, and the front wall 141 of the negative pressure cylinder 123 is closely spaced from the rear And a plunger wall 172 in contact (without a gap).

  The connecting cylinder 170 is engaged from behind with respect to the bulging part 164, and the rear end is in contact with the connecting wall between the front cylinder 162 and the rear cylinder 163 from the front. It is fitted against. As a result, the sliding body 161 and the plunger shaft 160 are integrally movable back and forth along the central axis O3.

In particular, since the plunger wall 172 is in contact with the front wall portion 141 and the sliding cylindrical portion 171 is in sliding contact with the inner peripheral surface of the cylindrical portion 140, the negative pressure plunger 124 moves backward, A portion of the negative pressure cylinder 123 located forward of the negative pressure plunger 124 is a sealed space S4 (see FIG. 5).
The sliding cylindrical portion 171 is a lip portion 171a whose diameter gradually increases as its rear end portion is moved rearward. The lip portion 171 a is in close sliding contact with the inner peripheral surface of the cylinder portion 140.

Inside the front side cylindrical portion 162 of the plunger shaft 160, there is provided a check valve 180 which allows discharge of air from the closed space S4 through the inside of the annular wall 165 and restricts the flow of air in the opposite direction. There is.
The check valve 180 is integrally formed at the front end opening portion of the shaft cylinder 181 inserted into the annular wall 165 from the front from the front and the front end opening of the shaft cylinder 181 and bulges outward in the radial direction orthogonal to the central axis O3. A tubular retaining portion 182 and an annular valve body 183 extending outward in the radial direction orthogonal to the central axis O3 as it goes rearward from the rear end opening of the shaft cylinder 181 are provided. .

  The retaining portion 182 is in contact with the longitudinal groove 166 formed on the front surface of the annular wall 165 from the front. Thus, it is possible to prevent the check valve 180 from being removed rearward while enabling the introduction of air from the closed space S4 side into the vertical groove 166. The valve body 183 is in contact with the rear corner of the annular wall 165 in a detachable manner. Thus, the check valve 180 closes the inside of the annular wall 165 in an openable manner.

  As shown in FIGS. 1 and 3, the connecting member 150 is inserted from the rear into the storage cylinder 121, and is integrally connected to the storage plunger 122. The connecting shaft 151, the connection shaft 151, and the negative pressure plunger And a connecting piece 152 that integrally connects the rear cylindrical portion 163 with the rear cylindrical portion 163.

The distal end of the connecting shaft 151 is fitted into the small diameter cylindrical portion 135 and the sliding cylindrical portion 136 of the storage plunger 122. Thus, the connection shaft 151 moves in the front-rear direction with the movement of the storage plunger 122. The connecting shaft portion 151 protrudes rearward with respect to the storage cylinder 121, and the rear end portion thereof is disposed inside an opening 55 a formed in the cover body 55.
On the outer peripheral surface of the connecting shaft portion 151, a plurality of rib pieces 153 protruding outward in the radial direction orthogonal to the central axis O2 are formed at intervals in the circumferential direction. The rib pieces 153 are in close proximity to or in contact with the inner circumferential surface of the storage cylinder 121, thereby suppressing rattling of the connection shaft portion 151.

  Of the plurality of rib pieces 153, at least the rib piece 153 disposed at the upper side is formed to have a length in the front-rear direction shorter than that of the other rib pieces 153, and the rear end 153a is associated with the backward movement of the storage plunger 122. The cover body 55 is approached from the front, and finally, the cover body 55 is locked in contact with the cover body 55 (see FIG. 5). As a result, the storage plunger 122 can be further restricted from moving backward.

  Therefore, this rib 153 also functions as the above-mentioned regulating member that regulates the backward movement of the storage plunger 122 and the negative pressure plunger 124. In addition, in the example of illustration, although the connection axial part 151 is formed in cylindrical shape, it may not be limited in this case, and may be formed in solid cylindrical shape.

  The connection piece 152 connects the connection shaft portion 151 and the rear cylindrical portion 163 of the negative pressure plunger 124 at the rear of the storage cylinder 121 and the negative pressure cylinder 123. As a result, the storage plunger 122 and the negative pressure plunger 124 can be moved integrally (in synchronization) in the front-rear direction via the connection member 150.

In the storage plunger 122 and the negative pressure plunger 124 configured as described above, as shown in FIGS. 1 and 3, the projecting valve 137 closes the rear end opening of the injection cylinder 11 and the negative pressure plunger 124 The position of the storage plunger 122 and the negative pressure plunger 124 when the plunger wall 172 is in close contact with the front wall portion 141 of the negative pressure cylinder 123 is set as the most advanced position.
Therefore, when the storage plunger 122 and the negative pressure plunger 124 are disposed at the most advanced position, almost no liquid is contained in the storage cylinder 121.

On the other hand, the rear end edge 153a of the rib piece 153 and the rear end edge 167a of the rib piece 167 come into contact with the cover body 55 from the front by the backward movement of the storage plunger 122 and the negative pressure plunger 124, respectively. The positions of the storage plunger 122 and the negative pressure plunger 124 at the time of being set are regarded as the last retracted position (see FIG. 5).
Therefore, when the storage plunger 122 and the negative pressure plunger 124 are disposed at the most retracted position, the liquid is accommodated in the storage cylinder 121 at maximum.

(Assembly of storage plunger and negative pressure plunger)
Next, in the assembly of the trigger type liquid jet device 1 configured as described above, the operation of mounting the storage plunger 122 and the negative pressure plunger 124 in the storage cylinder 121 and the negative pressure cylinder 123 will be briefly described.

  In this case, the storage plunger 122 and the negative pressure plunger 124 which are connected to each other via the connecting member 150 are inserted, for example, slowly from the rear into the storage cylinder 121 and the negative pressure cylinder 123. Thus, the air between the front wall portion 141 and the plunger wall 172 in the negative pressure cylinder 123 can be formed by the longitudinal groove 166 formed in the annular wall 165 and the inside of the annular wall 165 as shown by the arrows in FIG. The storage plunger 122 and the negative pressure plunger 124 can be inserted while discharging to the rear side beyond the check valve 180 through the gap with the shaft cylinder 181. At this time, the valve main body 183 of the check valve 180 is elastically deformed so as to be narrowed.

  Therefore, with the plunger wall 172 in close contact with the front wall portion 141 of the negative pressure cylinder 123 without any gap, and with the air properly extracted from between the front wall portion 141 and the plunger wall 172, the storage plunger 122 and the negative pressure Plunger 124 can be inserted. Thereby, the part located between the front wall part 141 and the plunger wall 172 can be maintained and sealed in a negative pressure state (decompression state).

  In addition, after inserting the storage plunger 122 and the negative pressure plunger 124, for example, the vacuum cylinder 123 is evacuated from the rear, and the non-return valve 180 is left between the front wall portion 141 and the plunger wall 172 through the check valve 180. You may discharge the minute air which is doing.

(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.

  As shown in FIG. 5, 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, so 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 it, so the liquid can be introduced into the space 138 of the storage cylinder 121 through the supply hole 120 . As a result, liquid is stored in the storage cylinder 121, so that the storage plunger 122 can be moved backward, and the projection valve 137 can be retracted from the inner discharge hole 17 and the outer discharge hole 16. Therefore, the rear end opening of the injection cylinder 11 is opened.

  Therefore, the liquid in the inner cylinder 13 can be introduced into the storage cylinder 121 through the supply hole 120 and into the injection cylinder 11 through the inner discharge hole 17 and the outer discharge hole 16. As a result, the internal pressure of the injection cylinder 11 rises, so the liquid in the injection cylinder 11 is guided to the ejection hole 4 through the injection hole 95, the passage space S3, the first groove 96, the second groove 103 and the rotation circuit 104. The liquid can be ejected forward from the ejection holes 4. At this time, since the liquid is guided to the ejection holes 4 through the rotation circuit 104, it is possible to spin the liquid using the rotation circuits 104, and the liquid to which the spins are applied can be ejected in the form of mist from the ejection holes 4. .

  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 122 is moved rearward to store the liquid in the storage cylinder 121 (fill can do.

As the storage plunger 122 moves rearward, the negative pressure plunger 124 connected to the storage plunger 122 via the connection member 150 moves rearward accordingly. As a result, since the plunger wall 172 of the negative pressure plunger 124 is separated from the front wall portion 141 of the negative pressure cylinder 123, the closed space S4 located in the negative pressure cylinder 123 in front of the negative pressure plunger 124 becomes negative pressure. Become. Thereby, a biasing force directed to the front side can be generated with respect to the negative pressure plunger 124 and the storage plunger 122.
In particular, since the negative pressure increases as the storage plunger 122 and the storage plunger 122 move rearward, the biasing force that biases the negative pressure plunger 124 and the storage plunger 122 forward becomes large.

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 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. The discharge valve 30 is closed.

At this time, although the supply of the liquid from the vertical supply cylinder portion 10 is stopped, the storage plunger 122 and the negative pressure plunger 124 integrally move forward toward the most advanced position by the negative pressure generated in the negative pressure cylinder 123 Begin to Thereby, the liquid accumulated (filled) in the storage cylinder 121 can be pushed out into the injection cylinder 11 via the supply hole 120 and the vertical supply cylinder 10, and the liquid is directed forward from the ejection hole 4. Liquid can be jetted continuously.
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, since the storage cylinder 121 is in communication with the inside of the vertical supply cylinder 10, it is easy to store the liquid from the inside of the vertical supply cylinder 10 at an early stage (immediately) in the storage cylinder 121. Therefore, since the liquid can be sufficiently stored in the storage cylinder 121 by the operation of the small trigger portion 51, it can be switched to the continuous injection of the liquid at an early stage, and it is easy to use.

Further, since the storage plunger 122 and the negative pressure plunger 124 are integrally restored and moved using the negative pressure generated in the negative pressure cylinder 123, for example, a restoration movement method using a metal component such as a coil spring Differently, it is possible to suppress an excessive load (load) acting on each component member 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.
Furthermore, 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.

  In addition, since the cross-sectional area of each passage of the injection hole 95 and the passage space S3 is larger than the cross-sectional area of the introduction passage 106 composed of the first groove 96 and the second groove 103 It becomes easier to introduce to the storage cylinder 121 side than to introduce into the injection cylinder part 11. Therefore, this also makes it easy to introduce the liquid into the storage cylinder 121 immediately.

Furthermore, when the liquid stored in the storage cylinder 121 is continuously jetted, the storage plunger 122 moves forward with the injection, so the projection valve 137 is inserted from the rear into the outer discharge hole 16 and the inner discharge hole 17. As a result, the rear end opening of the injection cylinder 11 is closed. As a result, it is possible to prevent the liquid from being introduced from the inside of the vertical supply cylindrical portion 10 into the injection cylindrical portion 11 any more, so that the continuous injection can be stopped promptly and the liquid shortage can be improved.
Furthermore, since the projection valve 137 blocks the rear end opening of the injection cylinder 11 at the initial stage of starting the ejection of the liquid, the liquid is ejected unless the internal pressure of the storage cylinder 121 exceeds a predetermined value. I have not. 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 the liquid leakage from the jet holes 4 when not in use.

When the storage plunger 122 and the negative pressure plunger 124 move forward, the storage plunger 122 and the negative pressure plunger 124 move to the most advanced position unless the trigger part 51 is pulled again. The pulling operation may be repeated.
In this case, the storage plunger 122 and the negative pressure plunger 124 gradually move rearward as a whole while repeatedly moving backward and forward. Thus, the liquid can be gradually accumulated in the storage cylinder 121. Then, by moving the storage plunger 122 and the negative pressure plunger 124 to the last retracted position, the liquid is kept for a long time until the storage plunger 122 and the negative pressure plunger 124 move from the last retracted position to the most advanced position. It can be injected continuously.

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

  Further, since the pressure receiving area of the negative pressure plunger 124 is larger than the pressure receiving area of the storage plunger 122, a negative pressure is generated in the negative pressure cylinder 123 to such an extent that the liquid stored in the storage cylinder 121 can be reliably pushed out. It is easy to do. Therefore, a large driving force can be applied to the storage plunger 122 and the negative pressure plunger 124. Therefore, the storage plunger 122 and the negative pressure plunger 124 can be smoothly moved forward and the liquid can be stably and continuously jetted from the ejection holes 4.

  Furthermore, since the storage cylinder 121 and the negative pressure cylinder 123 are arranged in parallel in the vertical direction, the overall length of the trigger type liquid jet device 1 can be shortened to miniaturize as compared with the case where these are directly connected in a row. In addition, since the negative pressure cylinder 123 is disposed behind the vertical supply cylinder 10 and is disposed below the storage cylinder 121, the vertical bulkiness can be suppressed, which can easily lead to downsizing.

  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 the above embodiment, a mechanism for locking the operation of the trigger unit 51 may be provided.
Moreover, in the said embodiment, although the storage cylinder 121 and the negative pressure cylinder 123 were arranged in parallel up and down, it is not limited in this case. For example, the storage cylinder 121 and the negative pressure cylinder 123 may be directly connected and integrally formed, and the storage plunger 122 and the negative pressure plunger 124 may be directly connected and integrally formed.

  Furthermore, although the pressure receiving area of the negative pressure plunger 124 is made larger than the pressure receiving area of the storage plunger 122, it may be smaller or equal.

  Moreover, in the said embodiment, although the trigger part 51 was made rockable back, it is possible to employ | adopt the form which the trigger part 51 moves back suitably. For example, the trigger unit 51 may be slidably moved rearward.

  Furthermore, in the above embodiment, the negative pressure plunger 124 and the storage plunger 122 are restored by using the negative pressure in the negative pressure cylinder 123 without using the biasing force that acts from the other member such as the biasing member. Although it is moved, the present invention is not limited to this. For example, in addition to the negative pressure in the negative pressure cylinder 123, the negative pressure plunger 124 and the storage plunger 122 can be obtained by utilizing the biasing force that acts on the negative pressure plunger 124 and the storage plunger 122 from an biasing member such as a metal spring. It may be restored and moved.

A: Container body 1: Trigger-type liquid ejector 2 ... main body of ejection device 3 ... nozzle member 4 ... ejection hole 10: longitudinal supply cylindrical portion 11: ejection cylindrical portion 50: trigger mechanism 51: trigger portion 120: supply hole 121: storage Cylinder 122 ... Storage plunger 123 ... Negative pressure cylinder 124 ... Negative pressure plunger 137 ... Protrusion valve

Claims (5)

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 which extends forward from the vertical supply cylinder and whose inside communicates with the inside of the vertical supply cylinder;
It has a trigger part extended downward from the injection cylinder part and movably disposed rearward in a forward biased state, and liquid is contained in the vertical supply cylinder part by the movement of the trigger part to the rear. A trigger mechanism for introducing the ink into the injection cylinder part from the inside of the injection cylinder part and emitting the gas from the inside of the injection cylinder part toward the ejection hole side;
The spout body is
A storage cylinder in which the inside communicates with the inside of the vertical supply cylinder through the supply hole and stores the liquid;
A storage plunger disposed in the storage cylinder so as to be movable in the axial direction along the central axis thereof, and moving toward one side in the axial direction as the liquid is stored in the storage cylinder;
A negative pressure plunger coupled to the storage plunger and associated with the axial movement of the storage plunger;
While extending along the axial direction, communication between the opening located on the other side in the axial direction and the outside is blocked, and the negative pressure plunger is accommodated therein so as to be movable toward one side in the axial direction. A negative pressure cylinder, and the trigger type liquid ejector characterized by the above-mentioned. 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 storage plunger. In the trigger type liquid ejector according to claim 1 or 2,
A trigger type liquid ejector characterized in that the storage cylinder and the negative pressure cylinder are arranged in parallel with each other. In the trigger type liquid ejector according to claim 3,
The storage cylinder and the negative pressure cylinder extend rearward from the vertical supply cylinder, and are juxtaposed vertically in a trigger type liquid ejector. In the trigger type liquid ejector according to any one of claims 1 to 4,
The storage cylinder is extended rearward from the vertical supply cylinder portion,
The rear end opening of the injection cylinder is formed in front of the supply hole,
The front end portion of the storage plunger is provided with a projection valve that protrudes forward through the supply hole and is configured to open the rear end opening of the injection cylinder openably from the rear. Liquid jet.

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