JP2019042665A - Trigger-type liquid sprayer - Google Patents

Abstract

To provide a trigger-type liquid sprayer which can discharge a liquid in a foam state in a non-circle shape.SOLUTION: A trigger-type liquid sprayer includes a trigger mechanism which distributes a liquid from an inside of a vertical supply cylinder part through an inside of an injection cylinder part to a spray hole side by moving a trigger part backward. The nozzle part is arranged in front of the injection cylinder part, and has a nozzle main body of which an inside communicates with a spray hole. The nozzle main body includes a foaming cylinder 33 which surrounds a periphery of the spray hole and extends in front of the spray hole. An outside air introduction hole for introducing outside air to an inside of the foaming cylinder 33 is formed on a peripheral wall part of the foaming cylinder 33. An inner surface shape viewed from a front side of the foaming cylinder 33 is formed in a non-circular shape.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a trigger type liquid ejector.

Conventionally, a trigger type liquid ejector described in Patent Document 1 below is known. The trigger type liquid jet device includes a jet unit main body mounted on a container body in which liquid is contained, and a nozzle member disposed on the front side of the jet unit main body and provided with a jet hole for jetting liquid forward. And have. The sprayer body extends in the vertical direction and is extended forward from the vertical supply cylinder, which sucks up the liquid in the container body, from the vertical supply cylinder, and the inside communicates with the inside of the vertical supply cylinder. It has an injection cylinder part, a trigger part extended downward from the injection cylinder part, and is disposed in a forward biased state so as to be able to pivot backward in the forward biasing state, and the liquid is And a trigger mechanism for introducing the inside of the vertical supply cylinder into the injection cylinder and injecting the inside of the injection cylinder toward the ejection hole. The nozzle member includes a nozzle main body including a connecting cylindrical portion connected to the injection cylindrical portion, and a valve body provided inside the connecting cylindrical portion so as to be able to move forward and backward in an urging state. The nozzle body is provided with a valve seat portion having an annular valve seat plate which is disposed inside the connection cylindrical portion and on which the front end portion of the valve body is seated. Then, the inside of the valve seat plate communicates with the ejection holes.
In the trigger type liquid jet device, when the trigger portion is swung backward, the liquid is ejected from the inside of the vertical supply cylinder part through the inside of the injection cylinder part to the inside of the connecting cylinder part. When the internal pressure inside the connecting cylinder portion exceeds a predetermined value, the valve body separates from the valve seat plate, and the liquid is ejected from the ejection hole.

Unexamined-Japanese-Patent No. 2006-204989

  By the way, in the above-mentioned conventional trigger type liquid ejector, there is a demand for making the liquid foam and non-circularly ejecting.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a trigger type liquid sprayer capable of discharging a liquid in a bubble shape and non-circularly.

  The trigger type liquid jet apparatus according to the present invention comprises a jet unit main body mounted on a container body containing a liquid, and a nozzle provided on the front side of the jet unit main body and having jet holes for jetting the liquid. A vertical feed tubular part extending vertically, and arranged in front of the vertical feed tubular part, and provided in the vertical feed tubular part. And a trigger unit disposed movably rearward in a forward biased state forward of the vertical supply cylinder, and the trigger unit is moved by the rearward movement of the trigger unit. And a trigger mechanism for circulating the liquid from the inside of the vertical supply cylinder part through the inside of the injection cylinder part toward the ejection hole side, the nozzle part is provided in front of the injection cylinder part, and the inside is the injection nozzle. A nozzle body communicating with the hole, the nozzle body being An external air introducing hole is formed in the peripheral wall portion of the foam tube so as to surround the periphery of the ejection hole and extending forward of the ejection hole, and an outside air introducing hole for introducing outside air into the foam tube is formed in the peripheral wall portion It is characterized in that the inner surface shape seen from the front of the bubble tube is formed in a non-circular shape.

  According to the trigger type liquid ejector according to the present invention, when the trigger part is swung backward, the liquid is ejected from the inside of the vertical supply cylinder part through the inside of the injection cylinder part to the inside of the nozzle body. The inside of the nozzle body is in communication with the ejection port, and the liquid ejected from the inside of the injection cylinder is ejected from the ejection port. When the liquid is jetted from the jet hole, the inside of the bubble forming tube surrounding the jet hole and extending in front of the jet hole becomes negative pressure. When the inside of the foam tube has a negative pressure, the outside air is introduced into the inside of the foam tube from the outside air introduction hole provided in the peripheral wall portion of the foam tube. When the outside air is introduced into the inside of the foam tube, the liquid is mixed with the outside air in the foam tube and is foamed to be in the form of foam and spouted from the front end opening of the foam tube. The bubbling of the liquid occurs, in particular, due to the mixed fluid of the liquid and the ambient air colliding with the inner surface of the bubble forming tube. Here, since the inner surface shape seen from the front of a bubble formation cylinder is formed in non-circular shape, the foamed liquid is discharged in non-circular shape. This makes it possible to foam the liquid and discharge it non-circularly.

  According to the trigger type liquid ejector according to the present invention, the liquid can be foamed and ejected non-circularly.

It is a longitudinal cross-sectional view of the trigger type liquid ejector which concerns on one Embodiment of this invention. It is an enlarged view of the principal part of the trigger type liquid ejector shown in FIG. It is an enlarged view of the principal part of the trigger type liquid ejector shown in FIG. 1, Comprising: It is a figure which shows the state which open | released the bubble formation cylinder. (A) The figure which looked at (a) a bubble-generating cylinder from the front which concerns on one Embodiment of this invention, (b) It is a figure which shows the bubble shape of the liquid discharged from the said bubble-generating cylinder. (A) The figure which looked at (a) a bubble-generating cylinder from the front which concerns on one another embodiment of this invention, (b) It is a figure which shows the bubble shape of the liquid discharged from the said bubble-generating cylinder. (A) The figure which looked at (a) a bubble-generating cylinder from the front which concerns on one another embodiment of this invention, (b) It is a figure which shows the bubble shape of the liquid discharged from the said bubble-generating cylinder.

Hereinafter, a trigger type liquid ejector according to an embodiment of 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 portion 3 mounted on the jet body 2.

  In the present embodiment, the central axis of the vertical supply tube portion 10 is taken as an axis O1, the direction along the axis O1 is referred to as the vertical direction, the container A side along the vertical direction is referred to as the lower side, and the opposite side is referred to as the upper side. Further, one direction intersecting with the axis O1 when viewed from the up and down direction 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.

The jet nozzle main body 2 includes a vertical supply cylindrical portion 10 extending in the vertical direction, and an injection cylindrical portion 11 extending from the vertical supply cylindrical portion 10 along the front-rear direction and communicating with the inside of the vertical supply cylindrical portion 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 called the front or the front, and the opposite direction is called the rear or the rear.

  The vertical supply cylinder portion 10 includes an outer cylinder 12 and an inner cylinder 13 fitted in the outer cylinder 12. The outer cylinder 12 has a large diameter portion 12a, a small diameter portion 12b disposed above the large diameter portion 12a and having a diameter smaller than that of the large diameter portion 12a, an upper end portion of the large diameter portion 12a and a lower end of the small diameter portion 12b. And a top wall 12d for closing the upper end of the small diameter portion 12b. The top wall 12 d covers the upper side of a suction valve 36 described later. The lower end portion of the small diameter portion 12b protrudes below the annular connection portion 12c.

  The inner cylinder 13 includes a large diameter portion 13a on which the large diameter portion 12a of the outer cylinder 12 is fitted and a small diameter portion 13b disposed above the large diameter portion 13a and having a diameter smaller than that of the large diameter portion 13a. It has a flange portion 13c connecting the upper end portion of the diameter portion 13a and the lower end portion of the small diameter portion 13b. A reduced diameter portion 13g having an outer diameter smaller than that of the small diameter portion 13b is formed on the upper portion of the small diameter portion 13b. A notch 13f is formed in the front portion of the upper end of the reduced diameter portion 13g.

  In the small diameter portion 13 b 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 annular connection portion 12 c of the outer cylinder 12 in a state where the clearance S 1 is secured between the flange portion 13 c and the annular connection 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 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.

  In a portion of the inner peripheral surface of the inner cylinder 13 located above the upper end of the pipe 15, an annular tapered cylindrical portion 35 which protrudes inward is formed. The tapered cylindrical portion 35 gradually reduces in 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 peripheral 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.

  The injection cylinder 11 protrudes forward from the vertical supply cylinder 10, and its rear end is connected to the front side 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 the discharge hole 16 formed in the outer cylinder 12 and the notch 13 f formed on the front side of the upper end of the inner cylinder 13. A cylinder portion 40 for cylinder that protrudes forward is integrally formed with the outer cylinder 12 at a portion located below the injection cylinder portion 11. The cylinder portion 40 for the cylinder is opened forward, and is partially formed integrally with the annular connecting portion 12 c of the outer cylinder 12.

  The ejector main body 2 includes at least a trigger mechanism 50 for circulating liquid from the inside of the vertical supply cylinder 10 through the inside of the injection cylinder 11 toward the injection hole 4, the entire vertical supply cylinder 10 and the injection cylinder 11 at least. And a cover body 55 covering the upper side and the left and right direction. The trigger mechanism 50 extends downward from the injection cylinder 11, and moves in the front-rear direction in conjunction with the trigger 51 disposed in a forwardly-biased state and pivotable to the rear, and the swing of the trigger 51. And a cylinder 53 whose pressure is increased and reduced as the piston 52 moves, and an elastic plate 54 which biases the trigger 51 forward.

  The cylinder 53 protrudes forward from the vertical supply cylinder 10 and communicates with the inside of the vertical supply cylinder 10 through a through hole 66 described later. The cylinder 53 is provided to project forward from the central portion of the rear wall 61 and the rear wall 61 closing the rear end opening of the outer cylinder 60 and the outer cylindrical portion 60 opening forward. And a piston guide 62 whose front end is closed.

  The inside of the piston guide 62 is opened to the rear, and in this opening, a fitting cylindrical portion 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 front end wall of the piston guide 62 is provided with a guide hole 62a penetrating the front end wall. An annular recess 62 b is formed at the rear end of the outer peripheral surface of the piston guide 62.

  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 communicating the clearance S2 and the clearance S1 defined between the annular connection 12c of the outer cylinder 12 and the flange 13c of the inner cylinder 13 in the annular connection 12c of the outer cylinder 12 64 are formed. Further, in the flange portion 13c of the inner cylinder 13, a third vent 65 is formed, which communicates the gap S1 with the large diameter portion 13a of the inner cylinder 13 and the inside of the mounting cap 14.

  In the rear wall portion 61 of the cylinder 53, a through hole 66 penetrating in the front-rear direction is formed in a portion located above the piston guide 62. At the peripheral edge of the opening of the through hole 66 in the rear wall portion 61, a projecting cylindrical portion 67 that protrudes rearward is formed, and the projecting cylindrical portion 67 is a penetrating portion formed in the small diameter portion 12b of the outer cylinder 12. It is fitted in the hole. A gap S3 is formed between the rear end portion of the protruding cylindrical portion 67 and the outer peripheral surface of the reduced diameter portion 13g of the inner cylinder 13. The through hole 66 communicates with the inside of the injection cylinder 11 through the gap S3. The suction valve 36 switches the communication between the inside of the container A and the inside of the cylinder 53 and the shutoff thereof.

  The piston 52 is fitted in the cylinder 53 so as to be slidable back and forth, and moves rearward as the trigger portion 51 swings rearward to move the liquid in the cylinder 53 into the gap S3 and the injection cylindrical portion 11. Supply. The 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 having a diameter larger than that of the connecting portion 70. It is formed in the shape of a cylinder opened to the

  The piston cylinder 71 opens rearward, and has a piston main body 72 into which the piston guide 62 is inserted, and protrudes from the rear end of the piston main body 72 outward in the radial direction, and an outer cylinder And a sliding cylindrical portion 73 slidably in contact with the inner peripheral surface of the portion 60. The rear end portion of the piston main body 72 is slidably fitted in the piston guide 62 in the front-rear direction. Thereby, in the cylinder 53, the liquid that has flowed in the vertical supply tubular portion 10 is introduced into the storage chamber 53a located on the rear side of the sliding cylindrical portion 73.

  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 central 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 makes a sliding contact with it. The connecting portion 70 of the piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. As a result, the piston 52 is urged forward by the urging force of the elastic plate 54 together with the trigger 51, and is moved backward as the trigger 51 is pivoted rearward and pushed into the cylinder 53. Be

  In addition, when the trigger portion 51 is in the forwardmost swinging position (the maximum forward position), the sliding cylindrical portion 73 of the piston 52 closes the first air hole 63. Then, when the piston 52 is moved backward by a predetermined amount due to the backward swinging 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 gap S1, the second vent hole 64, the gap S2 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 rotating 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. The trigger portion 51 is formed with an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 is formed 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 connecting shaft 86 is inserted into a connecting hole formed in the connecting portion 70 of the piston 52. Thereby, the trigger part 51 and the piston 52 are mutually connected. The connecting portion 70 of the piston 52 is rotatable about its axis with respect to the connecting shaft 86 and is connected movably by a predetermined amount in the vertical direction. Thus, the piston 52 can be moved back and forth in accordance with the swinging of the trigger portion 51 in the front and back direction.

  A horizontal plate-shaped upper plate member 84 is attached to the upper surface of the injection cylinder portion 11. On both left and right sides of the upper plate member 84, elastic plate portions 54 which are formed in a convex arc shape forward in a side view as viewed from the left and right direction and extend to the lower side of the injection cylinder 11 are integrally formed. . The elastic plate portion 54 is formed in a concentric arc shape 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.

  The 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. Thereby, the elastic plate portion 54 biases the trigger portion 51 forward via the locking piece 54d and the pocket portion 81a.

  The inside of the piston main body portion 72 communicates with the inside of the fitting cylindrical portion 41 through the inside of the guide hole 62 a and the inside of the piston guide 62. The inside of the fitting cylindrical portion 41 communicates with the inside of the container body A through the recovery passage 41 a provided in the jet body 2. The recovery passage 41 a is provided between the inner peripheral surface of the small diameter portion 12 b of the outer cylinder 12 and the outer peripheral surface of the small diameter portion 13 b of the inner cylinder 13. The recovery passage 41 a communicates with the inside of the container A through the third vent hole 65 and the large diameter portion 13 a of the inner cylinder 13. Thereby, when operating the trigger part 51 first, the air in the storage chamber 53a can be efficiently discharged | emitted in the container body A. As shown in FIG.

  The nozzle portion 3 is disposed on the front side of the jet body 2. As shown in FIG. 2, the nozzle unit 3 can move back and forth in a state in which the nozzle main body 22 including the connecting cylinder 21 connected to the injection cylinder 11 and the inside of the connecting cylinder 21 are biased forward. The valve body 23 provided in the above, a coil spring 32 for biasing the valve body 23 forwardly, a cylindrical foam tube 33 located forward of the ejection hole 4 and surrounding the ejection hole 4, foam formation And a lid 34 for openably closing the cylinder 33.

  A cylindrical connection member 19 is fitted to the outer peripheral surface of the front side portion of the injection cylinder 11, and the connection cylinder 21 is connected to the injection cylinder 11 via the connection member 19. The connecting member 19 includes a substrate 19a extending along a plane orthogonal to the front-rear direction, a first fitting cylinder 19b provided on the rear surface of the substrate 19a so as to project rearward and fitted in the injection cylinder 11, and the substrate A second fitting cylinder 19c projecting forward on the front face of 19a and having the connecting cylinder 21 fitted on the outer peripheral surface, and projecting forward on the inside of the second fitting cylinder 19c on the front face of the substrate 19a A cylinder cylinder 19d is provided, and a guide projection 19e is provided on the front surface of the base plate 19a so as to project forward to the inside of the cylinder cylinder 19d.

  Among these, the second fitting cylinder 19c, the cylinder cylinder 19d, and the guide protrusion 19e are coaxially arranged. Further, a liquid outflow hole 19f is formed in the substrate 19a at a position facing the front end opening of the ejection cylinder 11, and the inside of the ejection cylinder 11 and the cylinder cylinder 19d communicate with each other through the liquid outflow hole 19f. . Further, the substrate 19a is formed with an outside air inlet / outlet 19g for communicating the gap between the second fitting cylinder 19c and the cylinder cylinder 19d with the outside of the trigger type liquid jet device 1.

  The nozzle main body 22 is disposed inside the connection cylindrical portion 21 and has a valve seat portion 25 having an annular valve seat plate 24 on which the front end portion 23e of the valve body 23 is seated, and protrudes rearward from the valve seat plate 24 A tip mounting cylinder surrounding the sliding cylindrical portion 30 disposed radially inward of the connecting cylindrical portion 21, the pedestal portion 28 disposed forward of the valve seat portion 25, and the pedestal portion 28 from the radially outer side thereof It has a portion 31 and an outer cylindrical portion 29 surrounding the connecting cylindrical portion 21. The valve seat plate 24, the pedestal 28, the sliding cylinder 30, the tip mounting cylinder 31 and the outer cylinder 29 are coaxially arranged.

  The valve seat portion 25 further includes a valve seat sliding cylinder 38 protruding rearward from the valve seat plate 24. The valve seat sliding cylinder 38 is disposed coaxially with the sliding cylinder 30 and is formed smaller in diameter than the sliding cylinder 30. A plurality of communication holes 38 a opening toward the rear end of the valve seat sliding cylinder 38 are formed at intervals in the circumferential direction. The sliding cylinder 30 is fitted in the second fitting cylinder 19c. Thus, the second fitting cylinder 19 c is fitted in a fixed state between the inner peripheral surface of the connecting cylinder 21 and the outer peripheral surface of the sliding cylinder 30.

  A nozzle tip 26 in which the ejection hole 4 is formed at the front end and the rear end is opened is fitted in the tip mounting cylindrical portion 31. The nozzle tip 26 is fitted to the tip mounting cylinder 31 from the inside in the radial direction. A nozzle communication groove 27 extending over the entire length in the front-rear direction is formed on the outer peripheral portion of the pedestal portion 28. The nozzle communication groove 27 communicates with the inside of the ejection hole 4 and the valve seat plate 24.

  The valve body 23 is disposed coaxially with the guide protrusion 19 e and the valve seat plate 24 inside the second fitting cylinder 19 c. The front end portion 23 e of the valve body 23 is provided slidably in the front-rear direction in the valve seat sliding cylinder 38 with respect to the valve seat plate 24. The valve body 23 has a cylindrical valve body 23a whose front end is closed and whose rear end is open, a flange portion 23b provided on an outer peripheral surface of the valve body 23a so as to protrude in the longitudinal direction, and the flange portion And a seal cylinder portion c protruding forward from the front surface of 23 b.

  The front end portion (the front end portion 23e of the valve body 23) of the valve main body 23a is gradually enlarged in diameter as it goes rearward from the front end. The rear end portion (the rear end portion of the valve body 23) of the valve main body 23a is slidably fitted on the inner peripheral surface of the cylinder 19d in the front-rear direction. A plurality of through holes 23d are formed at intervals in the circumferential direction of the valve main body 23a in a portion of the valve main body 23a connected to the front side of the flange portion 23b.

  The seal cylinder portion 23c is gradually enlarged in diameter toward the front. The seal cylinder 23 c is disposed between the outer peripheral surface of the valve seat sliding cylinder 38 and the inner peripheral surface of the sliding cylinder 30, and is slidably fitted on the inner peripheral surface of the sliding cylinder 30 in the front-rear direction It is united. The inside of the seal cylinder portion 23c always communicates with the inside of the valve main body 23a through the communication hole 38a and the through hole 23d regardless of when the valve body 23 is seated on the valve seat plate 24 and when separated from the valve seat plate 24. Do.

  The coil spring 32 is disposed inside the valve body 23a. Inside the coil spring 32, a guide projection 19e is inserted. The coil spring 32 biases the valve body 23 forward to seat the front end 23 e of the valve body 23 on the valve seat plate 24.

  The foam tube 33 is encased in the tip mounting tube portion 31, extends forward from the front end edge of the tip mounting tube portion 31, and is formed in a tubular shape surrounding the periphery of the ejection hole 4. The foam tube 33 has a base end 33 a which is undercut-fitted to the outer peripheral surface of the chip mounting cylinder 31 and a base end 33 a connected to the base end 33 a and extends forward of the front end edge of the chip mounting cylinder 31. And a unit 33b. An outside air introduction hole 37 for introducing outside air to the inside of the foam tube 33 is formed in the peripheral wall portion of the foam tube 33. The outside air introduction hole 37 is formed in the peripheral wall portion of the tip end portion 33 b. Four external air introduction holes 37 of the present embodiment are formed at intervals in the circumferential direction of the foam tube 33. Note that the number of the outside air introduction holes 37 may be formed in the foam tube 33.

  In the outer peripheral surface of the base end portion 33 a of the foam tube 33, an alignment recess 33 a 1 is formed which is aligned with the tip mounting tube portion 31. A rib 22a protruding from the nozzle body 22 is intruding into a partial intermittent portion (groove) of the alignment recess 33a1. Thereby, the foam tube 33 is positioned in a predetermined direction with respect to the tip mounting tube portion 31 at the time of assembly, and the positioning recess 33a1 is engaged with the rib 22a on both sides in the circumferential direction of the foam tube 33. Thus, it does not rotate with respect to the tip mounting cylinder 31 even during use.

  The inner surface shape of the foam tube 33 is formed in a non-circular shape when viewed from the front, as shown in FIG. 4 (a). The inner surface of the foam tube 33 has a first inner surface 33d1 having a circular shape coaxial with the central axis O2 of the foam tube 33, and a plurality of semicircular shapes recessed outward in the radial direction with respect to the first inner surface 33d1. And the second inner surface 33 d 2 of The first inner surface 33d1 and the second inner surface 33d2 are continuously connected around the central axis O2. The curvature radius R2 of the second inner surface 33d2 is smaller than the radius R1 of the first inner surface 33d1.

  The second inner surface 33d2 is disposed on the upper side of the reference line L1 when a horizontal line extending in the left-right direction through the central axis O2 of the foam forming cylinder 33 is the reference line L1. The second inner surface 33d2 is disposed in line symmetry with the reference line L2 as the axis of symmetry when the vertical line extending vertically through the central axis O2 is the reference line L2, and the reference line L2 is in the left-right direction It is formed by a pair at the position sandwiched by. The center of curvature C of the second inner surface 33d2 is separated from the central axis O2 (the center of the first inner surface 33d1) of the foam tube 33, and when the reference line L2 is 0 °, substantially ± 45 ° from the central axis O2. It is arranged in the direction.

  The first inner surface 33 d 1 and the second inner surface 33 d 2 are formed over the entire length of the foam tube 33. That is, the first inner surface 33 d 1 and the second inner surface 33 d 2 are formed from the front end opening of the foam tube 33 to the proximal end 33 a including the formation range of the outside air introducing hole 37. The first inner surface 33d1 and the second inner surface 33d2 are preferably formed at least at the front end opening of the foam tube 33.

  As shown in FIGS. 3 and 4, the lid 34 is pivotably connected to the nozzle body 22 toward the front. The lid 34 has a main body 90 that closes the front end opening of the foam tube 33, a pivot shaft 91 that pivotally supports the main body 90 around a pivot axis L extending in the left-right direction, and a main body And an operation portion 92 projecting downward from 90. The main body 90 includes a protrusion 93 disposed below the front end opening of the foam tube 33, and a seal 94 that closes the ejection hole 4.

  The seal portion 94 includes a boss portion 94 a that protrudes rearward from the main body portion 90, and a reinforcing rib 94 b that reinforces the boss portion 94 a. The boss portion 94 a contacts the nozzle tip 26 from the front to close the ejection hole 4 in a state where the main body portion 90 is opposed to the front end opening of the foam tube 33. The boss portion 94 a is formed in a columnar shape disposed coaxially with the bubble formation tube 33. A plurality of reinforcing ribs 94b are provided at intervals in the circumferential direction of the boss portion 94a. The reinforcing rib 94 b protrudes rearward from the main body 90 and is connected to the outer peripheral surface of the boss 94 a.

  The pivot shaft portion 91 is provided to project in the left-right direction from both side surfaces of the upper end portion of the main body portion 90, and is formed in a pair of left and right side wall portions 29a projecting forward from the outer shell cylindrical portion 29 of the nozzle body 22. It is rotatably supported by the bearing hole. The operation part 92 protrudes below the side wall part 29a. On both side surfaces of the operation portion 92, an engagement piece 95 is formed to project in the left-right direction, and can be engaged with an engagement groove 96 (see FIG. 3) formed in the side wall 29a.

  In the above configuration, when spouting liquid, first, the lid 34 is turned forward to open the bubble forming tube 33 (see FIG. 3). Thereafter, when the trigger portion 51 shown in FIG. 1 is pulled backward against the biasing force of the elastic plate portion 54, the piston 52 is retracted with the backward movement of the trigger portion 51, so that the inside of the cylinder 53 (in the storage chamber 53a Can be introduced into the through hole 66, into the gap S3, and into the injection cylinder 11. At this time, the suction valve 36 is closed, and the communication between the inside of the vertical supply cylinder 10 and the inside of the injection cylinder 11 is cut off, and the inside of the injection cylinder 11 is pressurized.

  When the inside of the injection cylinder 11 is pressurized, the insides of the valve main body 23a and the seal cylinder 23c in the valve body 23 are also pressurized through the liquid outflow hole 19f shown in FIG. At this time, since the inner diameter of the seal cylindrical portion 23c is larger than the inner diameter of the valve main body 23a, due to the difference in pressure receiving area between the seal cylindrical portion 23c and the valve main body 23a, the valve body 23 is directed rearward. Pressure acts. When the pressure reaches a predetermined pressure or more, the valve body 23 is retracted against the front biasing force of the coil spring 32, and the front end 23e of the valve body 23 separates from the valve seat 25, whereby the injection cylinder 11 is formed. The interior of the nozzle communicates with the ejection hole 4, and the liquid is ejected from the ejection hole 4.

  When the liquid is ejected from the ejection hole 4, the surrounding liquid is entrained by the ejected liquid, and the inside of the bubble forming tube 33 has a negative pressure. When the inside of the bubble forming cylinder 33 becomes negative pressure, the outside air is introduced into the bubble forming cylinder 33 from the outside air introducing hole 37 provided in the peripheral wall portion of the bubble forming cylinder 33. When the outside air is introduced into the inside of the bubble forming cylinder 33, the liquid is mixed with the outside air in the bubble forming cylinder 33 to foam and becomes a foam, and is ejected from the front end opening of the bubble forming cylinder 33. The liquid ejected from the ejection hole 4 into the bubble forming cylinder 33 is in the form of a mist, and the mist-like liquid collides with the inner surface of the bubble forming cylinder 33 in the bubble forming cylinder 33, and the liquid flows When it is disturbed, it mixes well with the outside air and becomes foamy.

  The inner surface of the foam tube 33 is formed by the first inner surface 33d1 and the second inner surface 33d2 shown in FIG. 4A, and the inner surface shape of the foam tube 33 viewed from the front is formed in a non-circular shape. . Therefore, the liquid which collides with the inner surface of the foam cylinder 33 and is discharged in the form of foam is a foam 100 having a shape substantially similar to the inner surface of the foam cylinder 33, as shown in FIG. 4 (b). Is discharged. The foam 100 has a circular first outer contour 101 coaxial with the central axis O 2, and a plurality of second outer contours 102 projecting in a semicircular shape toward the radial outer side with respect to the first outer contour 101. , Has a non-circular shape.

  When the operation of pulling the trigger unit 51 is stopped, the supply of liquid from the inside of the cylinder 53 (in the storage chamber 53a) to the inside of the injection cylinder 11 passing through the inside of the vertical supply cylinder 10 is stopped. At this time, the valve body 23 is advanced by the forward biasing force of the coil spring 32, and the front end 23e of the valve body 23 is seated on the valve seat 25 to close it, and the inside of the injection cylinder 11 and the ejection hole 4 Block the communication of Then, since 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 piston 52 advances accordingly. Therefore, a negative pressure is generated in the cylinder 53 (in the storage chamber 53a), and the liquid in the container 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 cylinder 53 (in the storage chamber 53a). Thereby, it can prepare for the next injection.

As described above, in the trigger type liquid jet device 1 according to the present embodiment, the bubbling of the liquid jetted from the jet holes 4 is caused by the mixed fluid of the liquid and the outside air colliding with the inner surface of the foam tube 33. Occur. In the present embodiment, since the inner surface shape of the foam tube 33 viewed from the front is formed in a non-circular shape, the foamed liquid is discharged in a non-circular shape. For this reason, as shown to FIG. 4B, the foam body 100 can be discharged non-circularly.
Therefore, according to the trigger type liquid ejector 1 according to the present embodiment, it is possible to make the liquid foam and non-circularly eject.

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

  For example, as in a foam forming tube 33A according to another embodiment shown in FIG. 5A, the inner surface shape of the foam forming tube 33A viewed from the front has a diameter with respect to the first inner surface 33d1 and the first inner surface 33d1. It may be formed by four third inner surfaces 33 d 3 recessed in a triangular shape toward the outside in the direction. The third inner surface 33d3 is formed in the shape of an isosceles triangle when viewed from the front, and is disposed at equal intervals in the circumferential direction of the first inner surface 33d1 so that the apex thereof is disposed on the reference lines L1 and L2. There is. According to this bubble forming cylinder 33A, as shown in FIG. 5B, it is possible to discharge the substantially square or substantially rhombic foam 100A coaxially with the central axis O2.

  Further, for example, as in the case of a foam forming tube 33B according to another embodiment shown in FIG. 6A, the inner surface shape of the foam forming tube 33B viewed from the front is the first inner surface 33d1 and the first inner surface 33d1. It may be formed of five third inner surfaces 33 d 3 that are recessed in a triangular shape outward in the radial direction. The third inner surface 33 d 3 is arranged at equal intervals in the circumferential direction of the first inner surface 33 d 1 from the vertex of the first inner surface 33 d 1 on the reference line L 2. According to the bubble formation tube 33B, the substantially pentagonal or substantially five-star shaped foam 100B can be discharged coaxially with the central axis O2.

  Further, for example, the inner surface shape of the bubble forming tube 33 viewed from the front is not limited to the shape of each embodiment described above, and is not limited to the shape of each embodiment described above. It may be a vehicle etc.).

  In addition, it is possible to replace components in the embodiment with known components as appropriate without departing from the spirit of the present invention.

  1, 1 A: trigger type liquid jet, 2: jet body, 3: nozzle portion, 4: jet hole, 10: longitudinal supply cylindrical portion, 11: injection cylindrical portion, 22: nozzle main body, 33: foam tube, 37 External air introduction hole 33d1 first inner surface 33d2 second inner surface 33d3 third inner surface A container body

Claims (1)

An ejector body attached to a container containing a liquid;
And a nozzle portion disposed on the front side of the jet body and having a jet hole for jetting a liquid.
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 that circulates toward the ejection hole side through the
The nozzle portion includes a nozzle main body provided in front of the injection cylinder portion and the inside of which communicates with the ejection hole.
The nozzle body is provided with a foam tube surrounding the jet hole and extending forward of the jet hole.
In the peripheral wall portion of the foam tube, an outside air introduction hole for introducing the outside air to the inside of the foam tube is formed.
An inner surface shape viewed from the front of the bubble forming cylinder is formed in a non-circular shape.

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