JP6647097B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector.

2. Description of the Related Art A trigger-type liquid ejector that sucks liquid from a container body and discharges the liquid from a nozzle by operating a trigger portion extending below a nozzle is known (for example, Patent Document 1 below).
In a conventional trigger-type liquid ejector, an injection cylinder that extends forward is provided above a vertical supply cylinder that communicates with the inside of the container. On the front end side of the injection cylinder portion, a nozzle having an ejection hole for ejecting (ejecting) the liquid in the container is disposed. Below the injection cylinder portion, a trigger portion that is swingably supported rearward in a forward biased state, and a supply unit that is operated by operating the trigger portion are arranged.
When the trigger portion is operated against the forward biasing force, the supply means is operated, sucks up liquid from the inside of the container through the vertical supply tube portion, and injects the liquid forward through the ejection tube portion and the ejection hole of the nozzle. be able to. At this time, a downward force is applied to the injection cylinder portion due to the forward urging force acting on the trigger portion. When the operation of the trigger portion is released, the trigger portion is restored and displaced by the forward biasing force acting on the trigger portion, and the supply means returns to the standby state.

JP 2011-177630 A

By the way, in the conventional trigger type liquid ejector, the urging force acting on the trigger portion may be increased.
For example, in order to increase the amount of liquid to be ejected by one operation of the trigger unit (hereinafter referred to as one stroke), the supply unit may be large. At this time, as the force for operating the supply means increases, the force required to return the operated supply means to the standby state also increases, so that the urging force acting on the trigger portion also needs to be increased. . As a result, a large downward force is applied to the injection cylinder, and the injection cylinder may tilt downward.
Further, even when the injection cylinder is formed to be thin for weight reduction or the like, the injection cylinder may be inclined downward due to a downward force applied to the injection cylinder.
When the injection cylinder is tilted downward as described above, the nozzle disposed at the front end side of the injection cylinder may be displaced downward, and the ejection hole may face downward or the injection cylinder may be deformed. was there.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a trigger-type liquid ejector that can suppress a downward tilt of an injection cylinder due to an urging force acting on a trigger. I do.

In order to solve the above-mentioned problem, a trigger type liquid ejector of the present invention is provided with an ejector main body mounted on a container body containing a liquid and a front side of the ejector main body, and directs the liquid forward. A nozzle member formed with a jetting hole for jetting the liquid. The jetting device main body extends in a vertical direction, and a vertical supply cylinder for sucking up the liquid in the container body. And an injection cylinder part whose inside communicates with the inside of the vertical supply cylinder part, and which extends downward from the injection cylinder part and is arranged to be swingable rearward in a forward biased state. And the liquid is circulated from inside the vertical supply cylinder toward the ejection hole through the inside of the injection cylinder by swinging rearward of the trigger. Supply means for causing the injection cylinder to be located forward of the injection cylinder. With closing the front end opening portion of the injection tube portion is et mounted, obstruction communication hole communicating with the fitted on the first cylindrical part and the injection cylinder portion and the jet hole in the injection cylinder portion is formed And a restricting portion formed in one of the closing member and the supply means in contact with or close to the other in the front-rear direction.

  According to the trigger-type liquid ejector of the present invention, since one of the closing member and the supply unit is formed with the restricting portion that abuts or approaches the other in the front-rear direction, it acts on the trigger portion. When a downward force is applied to the injection cylinder due to the forward urging force, and the injection cylinder attempts to tilt downward, the regulating member is closed by the closing member attached to the injection cylinder and the supply means. By being sandwiched in the front-rear direction, it is possible to suppress the injection cylinder from tilting downward. Thereby, for example, it is possible to prevent the ejection hole from facing downward and to prevent the injection cylinder from being deformed.

  Here, the closing member and the supply unit each include an opposing portion opposing each other in the front-rear direction, and the regulating portion is formed on one of the opposing portions of the closing member and the supply unit. May be.

  In this case, the opposing portion of the closing member and the opposing portion of the supply unit oppose each other in the front-rear direction, and the restricting portion is sandwiched in the front-rear direction by each opposing portion, thereby suppressing the injection cylinder from tilting downward. The effect of doing so can be reliably achieved.

  Further, the supply means includes a piston that moves in the front-rear direction in conjunction with the swing of the trigger portion, and the inside thereof pressurizes and decompresses with the movement of the piston, and is attached to the vertical supply cylinder portion. A cylinder having an inside communicating with the inside of the vertical supply cylinder portion, and the regulating portion may be formed on one of the closing member and the cylinder.

In this case, when the injection cylinder is inclined downward due to the forward biasing force acting on the trigger, a closing member mounted on the injection cylinder from the front side, a cylinder mounted on the vertical supply cylinder, Since the regulating portion is sandwiched in the front-rear direction, the downward force applied to the injection cylinder portion can be received by the vertical supply cylinder portion via the closing member and the cylinder, so that the injection cylinder portion tilts downward. Can be reliably suppressed.
When the cylinder is formed in a cylindrical shape extending in the front-rear direction, the rigidity in the front-rear direction of the cylinder is improved, so that the cylinder is prevented from being deformed by the compressive force in the front-rear direction. Can be successful.

  Further, the ejector main body includes an elastic member that supports the trigger portion in a forward biased state, and the elastic member is disposed below the fixed portion fixed to the injection cylinder portion and the fixed portion, A locking portion locked to the trigger portion, wherein the regulating portion may be located below the fixed portion and above the locking portion.

In this case, when the trigger portion is swung rearward, a downward force acts on the fixed portion and the injection cylinder portion by the rearward pulling force acting on the elastic member, but this downward force is applied more than the fixed portion. The supply means can be directly received via the regulating portion located below, and the downward inclination of the injection cylinder portion can be reliably suppressed.
Further, since the restricting portion is disposed between the fixing portion and the locking portion of the elastic member in the vertical direction, a compact trigger-type liquid ejector that suppresses bulking in the vertical direction can be provided.

  In addition, the ejector main body includes an elastic member that supports the trigger portion in a forward biased state, and the elastic members are separately disposed on both left and right sides of the trigger portion and the injection cylinder portion, respectively. The part may penetrate the trigger part in the front-back direction.

In this case, since the elastic members provided on the left and right sides of the trigger portion respectively apply the biasing force to the trigger portion, and the restricting portion penetrates the trigger portion in the front-back direction, the elastic members acting on the left and right sides of the trigger portion are provided. The restricting portion can reliably prevent the injection cylinder from tilting downward due to the force.
In addition, since the elastic member applies a biasing force to the trigger portion from both the left and right sides of the trigger portion, the restricting portion is provided between the elastic members provided on the left and right sides while suppressing the twisting of the trigger portion in the left and right direction. Since the trigger portion penetrates in the front-rear direction, it is possible to provide a compact trigger-type liquid ejector that suppresses bulking in the left-right direction.

  ADVANTAGE OF THE INVENTION According to this invention, the trigger-type liquid ejector which can suppress that an injection cylinder part inclines downward due to the urging | biasing force which acts on a trigger part can be provided.

It is a longitudinal section of a trigger type liquid ejector concerning this embodiment. FIG. 2 is a partial cross-sectional view of a trigger portion, a closing member, and an upper plate member of the trigger type liquid ejector illustrated in FIG. 1 as viewed from the front. FIG. 2 is a side view showing a state in which a trigger portion is pulled backward in the trigger type liquid ejector shown in FIG.

Hereinafter, a trigger type liquid ejector 1 according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a trigger type liquid ejector 1 is mounted on a container A containing liquid and has an ejector main body 2 having a vertical supply cylinder 10 for sucking up liquid, and an ejection hole for ejecting liquid. And a nozzle member 3 mounted on the ejector main body 2.
Each member of the trigger type liquid ejector 1 is formed by injection molding or the like using a synthetic resin as a material unless otherwise specified.

  Here, in the present embodiment, the central axis of the vertical supply cylinder 10 is defined as an axis O1, and the container A side along the axis O1 is referred to as a lower side, and the opposite side is referred to as an upper side. Further, a direction along the axis O1 is referred to as a vertical direction, one direction perpendicular to the vertical direction is referred to as a front-rear direction, and a direction perpendicular to both the vertical direction and the front-rear direction is referred to as a left-right direction.

The ejector main body 2 includes the vertical supply cylinder 10 extending in the vertical direction, and an injection cylinder extending from the vertical supply cylinder 10 in the front-rear direction and having an inner side communicating with the inside of the vertical supply cylinder 10. 11 is provided. Here, in the front-back direction, the direction in which the injection cylinder 11 extends from the vertical supply cylinder 10 is referred to as front or front, and the opposite direction is referred to as rear or rear.
Further, the ejector main body 2 is mounted from the front side with respect to the injection cylinder portion 11 to close the front end opening 11a of the injection cylinder portion 11, and communicates with the communication hole 25 for communicating the inside of the injection cylinder portion 11 with the ejection hole 4. Is formed, a trigger part 51 extending downward from the injection cylinder part 11 and arranged to be swingable rearward in a forward biased state, and disposed below the injection cylinder part 11, By the backward swinging of the trigger portion 51, the supply means 50 for flowing the liquid from the vertical supply cylinder portion 10 through the inside of the ejection cylinder portion 11 toward the ejection hole 4 side, and the supply means 50 of the vertical supply cylinder portion 10 and the ejection cylinder portion 11 A cover body 55 that covers the entire body from above, behind, and left and right.

(Vertical supply cylinder)
The vertical supply cylinder section 10 includes an outer cylinder 12 having a top cylindrical shape, and an inner cylinder 13 fitted into the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b disposed above the large-diameter portion 12a and having a diameter smaller than the large-diameter portion 12a, an upper end 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, and is formed in a two-stage cylindrical shape whose diameter is reduced upward from below. Note that the upper end opening of the small diameter portion 12b is closed by the top wall portion 12d.
In the outer cylinder 12, a cylinder cylinder part 40 protruding forward is formed integrally with a portion located below the injection cylinder part 11.
The cylinder portion 40 is opened forward and partially formed integrally with the flange portion 12c of the outer tube 12.

  The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b disposed above the large-diameter portion 13a and having a smaller diameter than the large-diameter portion 13a, an upper end 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 to each other, and is formed in a two-stage cylindrical shape whose diameter is reduced upward from below.

The upper part of a pipe 15 which is disposed in the container A and whose lower end opening is located at the bottom (not shown) of the container A is fitted in the small diameter portion 13b of the inner cylinder 13. The flange portion 13c of the inner cylinder 13 is located below the flange portion 12c of the outer cylinder 12 in a state where a gap S1 is secured between the flange portion 13c of the inner cylinder 13 and the flange portion 12c of the outer cylinder 12. In the large-diameter portion 13a of the inner cylinder 13, a portion protruding downward from the large-diameter portion 12a of the outer cylinder 12 is formed with an annular flange portion 13d that protrudes outward in the radial direction. The flange 13d is provided in the upper end of the mounting cap 14 mounted (for example, screwed) on the mouth A1 of the container A, and locks the upper end of the mounting cap 14 rotatably around its axis. The flange 13d is vertically sandwiched between the mounting cap 14 and the upper edge of the opening A1 of the container A.
Note that the axis O1 of the vertical supply cylinder portion 10 composed of the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the center axis of the container A.

A valve seat 32 formed in a step shape is provided on the inner peripheral surface of the inner cylinder 13. An annular tapered cylindrical portion 35 protruding inward is formed in a portion of the inner peripheral surface of the inner cylinder 13 that is located below the valve seat 32 and above the upper end of the pipe 15. I have.
The diameter of the tapered tube portion 35 is gradually reduced as it goes downward. Inside the tapered tube portion 35, a spherical suction valve 36 that is separably seated on the inner peripheral surface of the tapered tube portion 35 is disposed. The suction valve 36 communicates and shuts off a space located above the tapered tube portion 35 and a space located below the tapered tube portion 35 in the inner tube 13.

(Injection cylinder)
The injection cylinder 11 protrudes forward from the vertical supply cylinder 10, and has a rear end connected to the front of the upper end of the vertical supply cylinder 10. The inside of the injection cylinder 11 communicates with the inside of the vertical supply cylinder 10 through an outer discharge hole 16 formed in the outer cylinder 12 and an inner discharge hole 17 formed in the inner cylinder 13.

(Supply means)
The supply means 50 includes a discharge valve 30, a suction valve 36, a piston 52 that moves in the front-rear direction in conjunction with the swing of the trigger part 51, and the inside thereof is pressurized and depressurized with the movement of the piston 52, and A cylinder 53 which is mounted on the vertical supply cylinder 10 and has an interior communicating with the vertical supply cylinder 10.
The discharge valve 30 is formed so as to be elastically deformable in the vertical direction, and is disposed inside the upper end of the inner cylinder 13. The discharge valve 30 is fitted into the inner cylinder 13, and is disposed below the base 31 and the base 31 in contact with the lower surface of the top wall 12 d of the outer cylinder 12. And a hollow spring portion 34 for vertically connecting the base portion 31 and the valve body 33 to each other.

The valve body 33 is pressed from above by the hollow spring portion 34 and is in close contact with the valve seat 32 of the inner cylinder 13. Thus, the valve element 33 blocks communication between a space located above the valve seat 32 in the inner cylinder 13 and a space located below the valve seat 32.
In addition, the valve body 33 rises against the urging force of the hollow spring portion 34 and separates from the valve seat 32, so that the space located above the valve seat 32 in the inner cylinder 13 and the valve seat 32 Also communicates with the space located below.

  The cylinder 53 is provided with an outer cylindrical portion 60 opening forward, a rear wall portion 61 closing a rear end opening of the outer cylindrical portion 60, and a cylinder 53 projecting forward from a central portion of the rear wall portion 61. A piston guide 62 whose front end is closed, and a flange portion 53 a (opposing portion) that protrudes outward from the front end opening edge of the outer cylindrical portion 60 in the radial direction of the outer cylindrical portion 60 are provided.

The cylinder 53 is mounted on the vertical supply cylinder 10. In the present embodiment, the outer cylinder 60 of the cylinder 53 is fitted inside the cylinder cylinder 40 of the vertical supply cylinder 10. The rear end face of the rear wall portion 61 is in contact with the rear wall (the small diameter portion 12b of the vertical supply cylinder portion 10) of the cylinder tube portion 40 from the front. The inside of the piston guide 62 is opened rearward, and a fitting protrusion 41 projecting forward from a rear wall of the cylinder portion 40 is fitted into the opening.
The inner peripheral surface of the cylinder tube portion 40 and the outer peripheral surface of the outer tube portion 60 are in close contact at both ends in the front-rear direction. On the other hand, between the inner peripheral surface of the cylinder tube portion 40 and the outer peripheral surface of the outer cylinder portion 60, an annular gap S2 is secured at an intermediate portion located between both ends in the front-rear direction. .

  A first ventilation hole 63 that connects the inside of the outer cylinder 60 and the gap S2 is formed in the outer cylinder 60. A second ventilation hole 64 for communicating the gap S2 and the gap S1 defined between the flange 12c of the outer cylinder 12 and the flange 13c of the inner cylinder 13 in the flange 12c of the outer cylinder 12. Are formed. Further, a third ventilation hole 65 is formed in the flange portion 13c of the inner cylinder 13 to allow the gap S1 to communicate with the large-diameter portion 13a of the inner cylinder 13 and the inside of the mounting cap 14.

A first through hole 66 penetrating in the front-rear direction is formed in a portion located above the piston guide 62 in the rear wall portion 61 of the cylinder 53. In the example shown in the drawing, a cylindrical portion projecting rearward is formed on the periphery of the opening of the first through hole 66 in the rear wall portion 61, and this cylindrical portion is formed on the small diameter portion 12 b of the outer cylinder 12. In the through hole. The first through-hole 66 communicates with a space located between the discharge valve 30 and the suction valve 36 in the inner cylinder 13 through a second through-hole 67 formed in the inner cylinder 13 of the vertical supply cylinder 10. are doing.
Accordingly, the inside of the cylinder 53 communicates with the space located between the discharge valve 30 and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. Accordingly, the discharge valve 30 switches between the communication between the inside of the injection cylinder 11 and the cylinder 53 and its shutoff, and the suction valve 36 switches between the communication between the inside of the container body A and the inside of the cylinder 53 and its shutoff.

The piston 52 includes a columnar connecting portion 70 connected to the trigger portion 51, and a piston cylinder 71 located rearward of the connecting portion 70 and having a larger diameter than the connecting portion 70. It is formed in a tubular shape that is open to the outside.
The cylinder 53 and the piston 52 are disposed on a common axis (not shown) extending in the front-rear direction.

  The piston cylinder 71 is opened rearward and has a piston main body 72 into which a piston guide 62 is inserted, and a flange 74 projecting radially outward from a rear end of the piston main body 72. And a sliding cylinder portion 73 protruding forward and rearward from a radially outer peripheral edge of the flange portion 74 and in close sliding contact with the inner peripheral surface of the outer cylindrical portion 60.

The inner diameter of the piston main body 72 is larger than the outer diameter of the piston guide 62. In the illustrated example, there is a slight gap between the inner peripheral surface of the piston main body 72 and the outer peripheral surface of the piston guide 62.
The flange portion 74 is formed in an annular shape when viewed from the front-rear direction, and connects the piston main body portion 72 and the sliding cylinder portion 73.
The sliding cylinder portion 73 is formed in a tapered shape whose diameter gradually increases from the center in the front-rear direction toward the front and the rear, and lip portions 73 a located at both ends in the front-rear direction are formed on the inner peripheral surface of the outer cylinder portion 60. Slide against
When the inner diameter of the outer cylinder portion 60 of the cylinder 53 is increased to increase the ejection amount of the trigger portion 51 per stroke, the outer diameter of the flange portion 74 of the piston 52 may be increased.

  The connecting portion 70 of the piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. Accordingly, the piston 52 is urged forward by the urging force of an elastic member 54 described later together with the trigger portion 51, and moves rearward with the rearward movement of the trigger portion 51 to be pushed into the cylinder 53. It is.

  Further, when the trigger portion 51 is at the forefront position (hereinafter referred to as a standby position) in the range in which the trigger portion 51 can swing, the sliding cylinder portion 73 of the piston 52 closes the first ventilation hole 63 and I have. Then, when the piston 52 moves backward by a predetermined amount due to the swing of the trigger portion 51 backward, the sliding cylinder portion 73 opens the first ventilation hole 63. Thus, the inside of the container body A communicates with the outside through the third ventilation hole 65, the second ventilation hole 64, and the first ventilation hole 63.

(Trigger part)
The trigger portion 51 includes a main plate member 80 having a front surface curved concavely toward the rear as viewed from the left and right, and a pair of side plate members 81 standing rearward from left and right side edges of the main plate member 80. Have.

  At the upper ends of the pair of side plate members 81, a pair of connecting plates 82 extending upward to the side of the injection cylinder 11 and sandwiching the injection cylinder 11 from the left and right are formed. Each of the pair of connecting plates 82 has a rotating shaft 83 projecting outward in the left-right direction. These rotating shafts 83 are rotatably supported by a pair of bearings 84b of an upper plate member 84 described later. Thus, the trigger portion 51 is supported so as to be swingable in the front-rear direction about the rotation shaft portion 83.

The trigger portion 51 has an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 extending rearward from a peripheral edge of the opening 51a.
A pair of connecting shafts 86 protruding toward the inside of the connecting tube 85 along the left-right direction is formed in a portion located on the rear side of the inner peripheral surface of the connecting tube 85. The pair of connection shafts 86 are individually inserted into connection holes formed in the connection 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 around the axis with respect to the connecting shaft 86, and is connected to be movable by a predetermined amount in the vertical direction. Accordingly, the piston 52 can be moved in the front-rear direction with the swing of the trigger portion 51 in the front-rear direction.

(Upper plate member)
An upper plate member 84 is attached to the upper surface of the injection cylinder 11. The upper plate member 84 is formed in a substantially rectangular shape when viewed from above and below, and is fixed downward to the upper surface plate 84a fixed to the upper surface of the injection cylinder portion 11 from both left and right ends of the upper surface plate 84a. A pair of elastic members 54 and a pair of bearing portions 84b that protrude separately. The pair of bearing portions 84b and the pair of elastic members 54 are formed in the same shape in the left portion and the right portion, respectively. The pair of elastic members 54 are separately arranged on both sides in the left-right direction of the trigger part 51 and the injection cylinder part 11, and support the trigger part 51 in a forward biased state.
In the present embodiment, the upper surface plate 84a, the pair of bearing portions 84b, and the pair of elastic members 54 are integrally formed, but may be formed separately.

The pair of elastic members 54 are formed in an arc shape that is convex forward when viewed from the left and right directions, and extend vertically from the upper end of the injection cylinder 11 to the lower end of the connecting portion 70 of the piston 52.
The pair of elastic members 54 extend in the up-down direction and are formed in a circular arc shape concentric with each other as viewed from the left-right direction, and fixed to connect the upper ends of these leaf springs 54a, 54b to each other. A portion 54e, a folded portion 54c connecting the lower ends of the leaf springs 54a and 54b to each other, and a locking portion 54d protruding downward from the folded portion 54c are provided.

The main leaf spring 54a is located on the front side of the sub leaf spring 54b. The folded portion 54c is formed in an arc shape projecting downward.
The locking portion 54d is inserted from above into a pocket 81a formed in the side plate member 81 of the trigger portion 51, and is locked to the pocket 81a. As a result, the elastic member 54 supports the trigger portion 51 in a forward biased state via the locking portion 54d and the pocket portion 81a.

  The fixing portion 54e is formed in the same arc shape as the folded portion 54c. The fixing portion 54e is fixed to the upper plate 84a, and the upper plate 84a is fixed to the injection cylinder 11. Therefore, the main leaf spring 54a and the sub leaf spring 54b are elastically deformed with the fixing portion 54e fixed to the injection cylinder 11 as a fixed end.

  The pair of bearing portions 84b are disposed behind the pair of elastic members 54. The pair of bearing portions 84b are formed in a C-shape that opens rearward, and rotatably support the rotation shaft portion 83 of the trigger portion 51.

When the trigger portion 51 is pulled rearward from the standby position, the elastic member 54 receives a rearward force (reaction force F described later) via the pocket portion 81a and the locking portion 54d of the trigger portion 51. With this force, the elastic member 54 is elastically deformed such that the folded portion 54c moves rearward while the fixing portion 54e is fixed. At this time, the main leaf spring 54a is elastically deformed more greatly than the sub leaf spring 54b.
Further, the locking portion 54d gradually moves upward with respect to the pocket portion 81a with the elastic deformation of the elastic member 54, but even if the trigger portion 51 reaches the rearmost position in the range in which the trigger portion 51 can swing. The engagement with the pocket portion 81a is maintained.

(Occlusion member)
The closing member 20 is located on the front side of the front end opening 11a of the injection cylinder 11 and is opposed to the front end opening 11a. A first tubular portion 22 extending outside and fitted to the injection tubular portion 11, a second tubular portion 23 extending forward from the facing plate portion 21, and a second tubular portion 23 located inside the second tubular portion 23 and facing the facing plate. A central protruding portion 24 extending forward from the portion 21 and a regulating portion 20a extending rearward from a portion of the opposing plate portion 21 located below the first cylindrical portion 22 are provided.

The opposing plate portion 21 is formed in a substantially rectangular shape when viewed from the front-back direction. The lower end of the facing plate portion 21 faces the flange portion 53a of the cylinder 53 in the front-rear direction.
The central protruding portion 24 is formed so as to fit inside the second cylindrical portion 23 without protruding forward from the second cylindrical portion 23.
Note that the lower end of the closing member 20 abuts on the upper end of the main plate member 80 of the trigger portion 51 from the front, thereby positioning the trigger portion 51 at the standby position.

  The second cylindrical portion 23 and the central protruding portion 24 are arranged at positions eccentric downward with respect to the central axis of the injection cylindrical portion 11. The communication hole 25 is formed in a portion of the opposing plate portion 21 that is located above the central projection 24 and inside the second cylindrical portion 23. The communication hole 25 penetrates the opposed plate portion 21 in the front-rear direction. Thus, the inside of the second cylindrical portion 23 communicates with the inside of the injection cylindrical portion 11 through the communication hole 25.

As shown in FIG. 2, a pair of regulating portions 20a are formed on the closing member 20 at intervals in the left-right direction. The pair of regulating portions 20a penetrate the trigger portion 51 in the front-rear direction.
Further, as shown in FIGS. 1 and 2, the pair of restricting portions 20a are formed in a substantially rectangular plate shape when viewed from the left and right directions. The rear end surfaces of the pair of restricting portions 20a abut or approach the flange portion 53a of the cylinder 53 from the front of the flange portion 53a. The pair of regulating portions 20a are located below the fixing portion 54e of the elastic member 54 and above the locking portion 54d of the elastic member 54.
Since the pair of restricting portions 20a are formed in a plate shape extending in the front-rear direction, they have high rigidity against compressive force in the front-rear direction and are hardly deformed.

(Nozzle member)
The nozzle member 3 is disposed on the front side of the ejector body 2 and includes a nozzle body 152 in which the ejection holes 4 are formed, and a nozzle plate 175 for switching the ejection form of the liquid into a mist form, a foam form, and the like. ing.
The nozzle plate 175 has a shaft portion 176 extending in the left-right direction, and is attached to the nozzle body 152 so as to swing around the shaft portion 176.

The nozzle body 152 is mounted on the second cylindrical portion 23 of the closing member 20. The nozzle body 152 includes a nozzle wall portion 170 in which the ejection hole 4 is formed, an outer fitting tube portion 221 that extends rearward from the nozzle wall portion 170, and is externally fitted to the second cylindrical portion 23 from the front. It has.
The outer fitting tube portion 221 is rotatably attached to the second tube portion 23 in a state where the outer fitting tube portion 221 is prevented from falling out. That is, the nozzle body 152 is rotatable around the axis of the second cylindrical portion 23.

A supported cylinder portion 172 rotatably fitted to the central projection 24 of the closing member 20 is protruded rearward from a portion of the nozzle wall portion 170 located inside the outer fitting cylinder portion 221. ing. A first concave groove 172a extending in the front-rear direction is formed on the inner peripheral surface of the supported cylindrical portion 172.
In a portion of the rear surface of the nozzle wall portion 170 located inside the supported cylinder portion 172, the spiral circuit 12e is formed in a concave shape.

At the front end of the outer peripheral surface of the central protruding portion 24, a second concave groove 182a capable of communicating the first concave groove 172a and the circling circuit 12e is formed. The first concave groove 172a and the second concave groove 182a communicate with each other at a predetermined rotational position of the nozzle body 152 around the central projection 24, and are in a non-communication state at other rotational positions.
Note that, between the supported tubular portion 172 and the outer fitting tubular portion 221, a seal tubular portion 178 that is in close contact with the inside of the second tubular portion 23 is provided.

  A cylindrical passage space 183 is formed between the second cylindrical portion 23 and the supported cylindrical portion 172 of the nozzle body 152. When the first groove 172a and the second groove 182a communicate with each other, the passage space 183 communicates with the ejection hole 4 through the first groove 172a, the second groove 182a, and the turning circuit 12e. The first groove 172a and the second groove 182a form an introduction path 186.

(Operation of trigger type liquid ejector)
Next, the operation of 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 ejector 1 by a plurality of operations of the trigger part 51, and the liquid can be sucked up from the vertical supply cylinder part 10.

  When the trigger portion 51 is pulled rearward against the urging force of the elastic member 54, the piston 52 retreats with the rearward movement of the trigger portion 51, so that the liquid in the cylinder 53 is supplied to the first through hole 66 and the second It can be introduced into the inner cylinder 13 of the vertical supply cylinder 10 through the through hole 67. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 to close it and pushes up the discharge valve 30 to open it, so that the liquid is introduced into the injection cylinder 11 through the inner discharge hole 17 and the outer discharge hole 16. Liquid can be introduced.

  As a result, the internal pressure of the injection cylinder 11 increases, so that the liquid in the injection cylinder 11 is jetted forward from the ejection hole 4 through the communication hole 25, the passage space 183, the introduction path 186, and the swirling circuit 12e. Can be.

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 member 54 and returns to the standby position. Moves forward. Therefore, a negative pressure is generated in the cylinder 53, and the liquid in the container A can be sucked into the vertical supply cylinder 10 through the pipe 15 by the negative pressure.
Then, the newly sucked liquid pushes up the suction valve 36 to open the valve, and is introduced into the cylinder 53. This makes it possible to prepare for the next injection. Note that the discharge valve 30 is closed.

Here, the relationship between the forces acting on each member when the trigger portion 51 is pulled rearward will be described with reference to FIG.
When the trigger portion 51 is pulled rearward against the forward biasing force of the elastic member 54, a reaction force F of the forward biasing force acts on the elastic member 54. The reaction force F is a rearward force that the elastic member 54 receives from the trigger portion 51 at the locking portion 54d as indicated by an arrow F in FIG.
Since the main leaf spring 54a and the sub leaf spring 54b are pulled backward and downward by the reaction force F, a tensile force T indicated by an arrow T in FIG. 3 acts on the fixing portion 54e of the elastic member 54. Since the fixing portion 54e is fixed to the injection cylinder 11 together with the upper surface plate 84a, the injection cylinder 11 receives a downward force due to the tensile force T.
As described above, a downward force is applied to the injection cylinder portion 11 due to the forward urging force that the elastic member 54 acts on the trigger portion 51. Therefore, when the front urging force increases, the downward force applied to the injection cylinder portion 11 decreases. The power toward is also greater.

The injection cylinder 11 protrudes forward from the vertical supply cylinder 10. For this reason, when a downward force is applied to the injection cylinder 11, the injection cylinder 11 tends to bend downward starting from the connection with the vertical supply cylinder 10.
At this time, a closing member 20 is mounted on the front side of the injection cylinder portion 11, and a regulating portion 20 a extending rearward from the opposing plate portion 21 is formed on the closing member. Since the rear end surface of the restricting portion 20a is in contact with or close to the flange portion 53a of the cylinder 53, when the injection cylinder 11 attempts to bend downward, the rear end surface of the restricting portion 20a changes to the flange portion 53a of the cylinder 53. And press it. Since the cylinder 53 is mounted on the vertical supply cylinder 10, the pressing force received by the cylinder 53 from the restricting section 20 a is received by the vertical supply cylinder 10.

In this manner, the downward force applied to the injection cylinder 11 is received by the cylinder 53 and the vertical supply cylinder 10 via the restricting portion 20a of the closing member 20, so that the injection cylinder 11 tilts downward. Can be prevented. Accordingly, for example, in order to increase the injection amount per stroke, the inner diameter of the outer cylinder portion 60 of the cylinder 53 is increased, and the resistance generated when the piston 52 slides with respect to the cylinder 53 increases. Therefore, even when the forward biasing force of the trigger portion 51 is increased, the injection cylinder portion 11 can be prevented from bending downward, so that the nozzle member 3 moves downward and the ejection hole 4 Can be suppressed downward, and the direction in which the contents are ejected can be suppressed from downward.
In addition, even when the injection cylinder 11 is formed to be thin for weight reduction and size reduction, the injection cylinder 11 can be similarly prevented from tilting downward.

  Note that the restriction portion 20a may extend forward from the flange portion 53a of the cylinder 53. In this case, the front end of the restricting portion 20 a extending forward from the flange portion 53 a of the cylinder 53 abuts or approaches the rear side of the lower end of the opposing plate portion 21 of the closing member 20 from behind. . Even when such a configuration is adopted, when the injection cylinder 11 is bent downward, the restricting portion 20a is sandwiched in the front-rear direction by the closing member 20 and the cylinder 53, and the injection cylinder 11 Can be prevented from tilting downward.

  As described above, according to the trigger type liquid ejector 1 according to the present embodiment, a downward force is applied to the injection cylinder 11 due to the forward urging force acting on the trigger 51, and the injection cylinder When the opening 11 is inclined downward, the restricting portion 20a is sandwiched in the front-rear direction by the closing member 20 and the supply means 50, thereby suppressing the injection cylinder 11 from inclining downward and the ejection hole 4 from facing downward. be able to.

  Further, the opposing plate portion 21 of the closing member 20 and the flange portion 53a of the cylinder 53 oppose each other in the front-rear direction, and the regulating portion 20a is sandwiched between the opposing plate portion 21 and the flange portion 53a in the front-rear direction. In addition, the effect of suppressing the ejection cylinder portion 11 from inclining downward and the ejection hole 4 from facing downward can be reliably achieved.

Further, when the injection cylinder 11 is inclined downward due to the forward urging force acting on the trigger 51, the closing member 20 mounted on the injection cylinder 11 from the front side and the vertical supply cylinder 10 are mounted on the vertical supply cylinder 10. The vertical supply cylinder 10 can receive the downward force applied to the injection cylinder 11 through the closing member 20 and the cylinder 53 by the restriction part 20 a being sandwiched in the front-rear direction by the cylinder 53. Therefore, it is possible to reliably prevent the ejection cylinder portion 11 from tilting downward and the ejection hole 4 from facing downward.
Furthermore, since the cylinder 53 is formed in a cylindrical shape extending in the front-rear direction, the rigidity of the cylinder 53 in the front-rear direction is large, and the cylinder 53 is prevented from being deformed by a compressive force in the front-rear direction. Success can be achieved more reliably.

Further, when the trigger portion 51 is swung rearward, a downward force acts on the fixing portion 54e of the elastic member 54 and the injection cylinder portion 11 due to the rearward tensile force T acting on the elastic member 54. Can be directly received by the cylinder 53 via the restricting portion 20a located below the fixed portion 54e, and the downward force can reliably prevent the injection cylinder portion 11 from tilting. .
Further, since the restricting portion 20a is disposed between the fixing portion 54e and the locking portion 54d of the elastic member 54 in the vertical direction, it is possible to provide the compact trigger type liquid ejector 1 in which the bulk in the vertical direction is suppressed. it can.

Further, the elastic members 54 provided on both the left and right sides of the trigger portion 51 apply biasing forces to the trigger portion 51, and the regulating portion 20a penetrates the trigger portion 51 in the front-rear direction. The restricting portion 20a can reliably prevent the injection cylinder portion 11 from tilting downward due to the urging force acting on both sides.
In addition, since the elastic member 54 applies a biasing force to the trigger portion 51 from both left and right sides of the trigger portion 51, the trigger portion 51 is twisted in the left-right direction as compared with the case where the elastic member 54 is arranged on one of the left and right. Since the restricting portion 20a penetrates the trigger portion 51 in the front-rear direction between the elastic members 54 disposed on the left and right sides, a compact trigger-type liquid ejector in which the bulk in the left-right direction is suppressed is suppressed. 1 can be provided.

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

For example, in the above-described embodiment, the elastic member 54 formed of a synthetic resin having the main leaf spring 54a and the sub leaf spring 54b is used. However, the present invention is not limited to this, and the forward biasing force is applied to the trigger portion 51 using a tension coil spring. May be.
In the above-described embodiment, the supply means 50 including the cylinder 53 and the piston 52 is used. However, the invention is not limited thereto. A supply means for flowing the liquid in the container A toward the ejection hole 4 through the inside of the portion 11 may be employed.

  In the above-described embodiment, the closing member 20 including the pair of restricting portions 20a is used. However, the present invention is not limited thereto, and a closing member including one or three or more restricting portions may be employed.

  In addition, the components in the above-described embodiments can be appropriately replaced with known components without departing from the spirit of the present invention, and the above-described embodiments and modified examples may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Trigger type liquid ejector, 2 ... ejector main body, 3 ... nozzle member, 4 ... ejection hole, 10 ... vertical supply cylinder part, 11 ... injection cylinder part, 20 ... closing member, 20a ... regulating part, 23 ... 2 tube portion, 50 supply means, 51 trigger portion, 52 piston, 53 cylinder, 54 elastic member, 54d locking portion, 54e fixing portion

Claims (5)

An ejector body attached to the container body containing the liquid,
A nozzle member arranged on the front side of the ejector main body and having an ejection hole for ejecting liquid forward.
The ejector body,
A vertical supply cylinder extending vertically and sucking up the liquid in the container,
An injection tube portion extending forward from the vertical supply tube portion and having an inner side communicating with the inside of the vertical supply tube portion,
A trigger portion extending downward from the injection cylinder portion and arranged to be swingable rearward in a forward biased state;
A supply means disposed below the injection cylinder and for causing the liquid to flow from the inside of the vertical supply cylinder toward the ejection hole side through the inside of the injection cylinder by swinging backward of the trigger section.
A first tubular portion and an inside of the injection cylinder portion which are mounted on the injection cylinder portion from the front side of the injection cylinder portion to close a front end opening of the injection cylinder portion and which are externally fitted to the injection cylinder portion. A closing member formed with a communication hole communicating with the ejection hole,
A trigger type liquid ejector, characterized in that one of the closing member and the supply means is provided with a restricting portion which comes into contact with or approaches the other in the front-rear direction. The closing member and the supply unit separately include opposing portions opposing each other in the front-rear direction,
The trigger type liquid ejector according to claim 1, wherein the restricting portion is formed on one of the opposing portion of the closing member and the supply unit. The supply means,
A piston that moves in the front-rear direction in conjunction with the swing of the trigger portion,
A cylinder which is internally pressurized and depressurized with the movement of the piston, and which is attached to the vertical supply cylinder and has an internal communication with the vertical supply cylinder.
The trigger type liquid ejector according to claim 1, wherein the restricting portion is formed on one of the closing member and the cylinder. The ejector body includes an elastic member that supports the trigger portion in a forward biased state,
The elastic member has a fixed portion fixed to the injection cylinder portion, and a locking portion disposed below the fixed portion and locked to the trigger portion,
The trigger type liquid ejector according to any one of claims 1 to 3, wherein the regulation part is located below the fixed part and above the locking part. The ejector body includes an elastic member that supports the trigger portion in a forward biased state,
The elastic member is disposed separately on both sides in the left-right direction of the trigger portion and the injection cylinder portion,
The trigger type liquid ejector according to any one of claims 1 to 4, wherein the regulation part penetrates the trigger part in the front-back direction.

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