JP2020082040A - Trigger type liquid sprayer - Google Patents

Abstract

To provide a trigger-type liquid sprayer that can suppress a nozzle member from separating from a relay member.SOLUTION: A trigger-type liquid sprayer comprises: a sprayer main body 2; a relay member 4 protruding forward from the sprayer main body 2; and a nozzle member 5 assembled to the relay member 4 from a front side and having a spraying port 6 for spraying liquid formed therein. The sprayer main body 2 comprises an injection cylinder part 11 that circulates liquid toward the spraying hole 6 side and a trigger mechanism T that circulates liquid in the injection cylinder part 11 toward the spraying hole 6 side by rearward movement of a trigger part 51. The relay member 4 comprises an attachment cylinder part 92, extended in a longitudinal direction, to which the nozzle member 5 is attached. The nozzle member 5 comprises a first externally-fitting cylinder part 101 that fits to an outer peripheral surface of the attachment cylinder part 92, and a rear end 101a of the first externally-fitting cylinder part 101 is positioned closer to a rear side than a front end of the injection cylinder part 11.SELECTED DRAWING: Figure 1

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. This trigger type liquid ejector is combined with an ejector main body mounted on a container body containing the liquid, a relay member protruding forward from the ejector main body, and the relay member from the front to eject the liquid. A nozzle member having an ejection hole formed therein. Further, in this trigger type liquid ejector, the relay member supports the nozzle member in the mounting cylinder portion fitted into the outer fitting cylinder portion of the nozzle member.

JP, 2008-108553, A

In the conventional structure, the mounting cylinder portion extends in the front-rear direction and is fitted into the outer fitting cylinder portion. When the length of the mounting cylinder is long, there is a possibility that the external fitting cylinder may come off due to the deformation of the mounting cylinder when an external force is applied.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a trigger type liquid ejector capable of suppressing the detachment of the nozzle member from the relay member.

In order to solve the above problems, the present invention proposes the following means.
A trigger type liquid ejector according to one aspect of the present invention includes an ejector main body mounted on a container body in which a liquid is stored, a relay member protruding forward from the ejector main body, and a front side with respect to the relay member. A nozzle member formed in combination with a nozzle hole for ejecting liquid, wherein the ejector body extends in the up-down direction and sucks the liquid in the container body; and the vertical supply cylinder portion. An injection cylinder part that is disposed in front of the vertical supply cylinder part to flow the liquid in the vertical supply cylinder part toward the ejection hole side, and is disposed in front of the vertical supply cylinder part so as to be movable rearward in a front-biased state. A trigger mechanism that causes 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 the rearward movement of the trigger part. , A mounting cylinder part that extends in the front-rear direction and in which the nozzle member is mounted, the nozzle member includes a first outer fitting cylinder part that fits on an outer peripheral surface of the mounting cylinder part, and the first outer fitting cylinder The rear end of the section is located rearward of the front end of the injection cylinder section.

According to the above configuration, the rear end of the first outer fitting tubular portion of the nozzle member is located rearward of the front end of the ejection tubular portion of the ejector body. That is, the first outer fitting cylinder part is fitted to the mounting cylinder part of the relay member while being overlapped with the injection cylinder part in the front-rear direction. Therefore, the mounting cylinder portion of the relay member is supported from the inside by the injection cylinder portion and deformation thereof is suppressed. As a result, the fitting strength of the first external fitting tubular portion with respect to the mounting tubular portion with respect to the external force is enhanced, and the nozzle member can be prevented from coming off the relay member even when the external force is applied.

Further, according to the above configuration, since the nozzle member extends rearward from the front end of the injection cylinder portion, the overall length of the nozzle member in the front-rear direction can be increased. That is, according to the above configuration, the nozzle member can be provided so as to largely project from the ejector body toward the front.
Generally, the front end of the nozzle member is arranged in front of the front end of the trigger portion. This is to prevent an unexpected external force from being applied to the trigger portion during the storage or flowing process, and to prevent the liquid from leaking from the ejection hole. On the other hand, the configuration of arranging the front end of the trigger portion rearward of the front end of the nozzle member has been a constraint in terms of increasing the pulling margin of the trigger portion in the front-rear direction.
According to the above configuration, it is possible to project the nozzle member forward from the ejector body while suppressing the separation of the nozzle member from the relay member. As a result, the front end of the trigger portion can be arranged in front of the conventional one, and a large pulling amount in the front-rear direction of the trigger portion can be secured. As a result, a structure that increases the amount of liquid that can be ejected by one operation of the trigger portion can be adopted.

In the trigger type liquid ejector according to one aspect of the present invention, the relay member is located at a rear end of the mounting cylinder portion and faces a front end of the ejection cylinder portion in a front-rear direction, and extends rearward from the partition wall. It may be configured to include a second outer fitting cylinder portion fitted to the outer peripheral surface of the injection cylinder portion.

According to the above configuration, the rear end of the first outer fitting cylinder portion is located behind the partition wall of the relay member. That is, the first outer fitting cylinder portion overlaps the partition wall in the front-rear direction. Therefore, the partition wall can reinforce the mounting cylinder portion, and the fitting strength between the mounting cylinder portion and the first outer fitting cylinder portion can be increased.
Further, according to the above-described configuration, the partition wall is provided on the front side as compared with the conventional structure, so that sink marks of the mounting cylinder portion at the time of molding are suppressed, and dimensional accuracy of the front end of the mounting cylinder portion can be improved. .. As a result, the fitting strength between the mounting tubular portion and the first external fitting tubular portion can be increased.
Further, according to the above configuration, the partition wall is provided on the front side as compared with the conventional structure, so that the capacity of the space (annular space described later) provided between the nozzle member and the relay member in front of the partition wall is reduced. Can be made smaller. Since this space connects the injection cylinder and the ejection hole, the pressure loss of the liquid increases as the volume of this space increases. According to the above configuration, by reducing the volume of this space, the pressure loss in the flow path of the liquid can be reduced, and the liquid can be ejected from the ejection hole with a small operating force.
Further, according to the above configuration, since the second outer fitting cylinder portion fits on the outer peripheral surface of the injection cylinder portion, the relay member is more reliably held with respect to the injection cylinder portion. As a result, the relay member is more effectively reinforced by the injection cylinder portion, and the fitting strength between the first outer fitting cylinder portion and the mounting cylinder portion can be increased.

In the trigger type liquid ejector of one aspect of the present invention, the relay member includes a relay flange portion provided on an outer peripheral surface of the second outer fitting cylinder portion, and a partition wall and the relay flange portion extending in the front-rear direction. The reinforcing rib portion for connecting may be provided.

According to the above configuration, the relay member is reinforced by the reinforcing rib portion and the relay flange portion. As a result, the deformation of the mounting cylinder is suppressed, and the fitting strength with the first outer fitting cylinder is increased.

In the trigger type liquid ejector according to one aspect of the present invention, the trigger portion is inclined forward as it goes downward, and is arranged to be swingable rearward about a rotation shaft portion of an upper end portion. It may be configured.

According to the above-mentioned composition, operation of a trigger part turns into rotary motion. Therefore, by increasing the overall length of the trigger portion, the operating torque of the trigger portion can be increased when operating the tip portion of the trigger portion. In other words, by increasing the total length of the trigger portion, it is possible to reduce the operating force of the trigger portion when operating the tip portion of the trigger portion.
As described above, in the trigger-type liquid ejector according to the aspect of the present invention, since the overall length of the nozzle member in the front-rear direction can be increased, the front end of the trigger portion can be arranged in front of the conventional one. .. That is, according to the above configuration, the entire length of the trigger portion can be lengthened, and the operating force of the trigger portion can be reduced by operating the tip portion of the trigger portion.

According to the present invention, it is possible to provide a trigger type liquid ejector in which the nozzle member is difficult to separate from the relay member.

It is a longitudinal cross-sectional view of the trigger type liquid ejector of one embodiment.

An embodiment of the present invention will be described below with reference to FIG.
The trigger type liquid ejector 1 of the present embodiment has a vertical supply cylinder part 10 for sucking up the liquid in the container body A, and an ejector main body 2 mounted on the container body A in which the liquid is stored; The nozzle member 5 having the ejection hole 6 for ejecting the nozzle member 5 and the relay member 4 connecting the ejector main body 2 and the nozzle member 5 are provided. In addition, each component of the trigger type liquid ejector 1 is a molded product using a synthetic resin unless otherwise specified.

Hereinafter, the direction along the central axis O1 of the vertical supply cylinder portion 10 is referred to as the vertical direction, the container body A side is the lower side and the opposite side is the upper side along the vertical direction. The side on which the nozzle member 5 is located with respect to the vertical supply cylinder portion 10 when viewed in the vertical direction is called the front side, and the opposite side is called the rear side. The direction orthogonal to the front-back direction when viewed from the top-bottom direction is called the left-right direction.

The ejector main body 2 is provided with a vertical supply cylinder portion 10 extending in the vertical direction, and an injection cylinder portion that is disposed in front of the vertical supply cylinder portion 10 and causes the liquid in the vertical supply cylinder portion 10 to flow toward the ejection hole 6 side. 11, a trigger mechanism T having a trigger portion 51 disposed in front of the vertical supply cylinder portion 10 so as to be movable rearward in a biased state, a vertical supply cylinder portion 10, an injection cylinder portion 11 and a cylinder 53 described later. And a cover body 55 that integrally covers the upper part, the rear part, and the left-right direction.

The vertical supply cylinder portion 10 includes an outer cylinder 12 having a top-like cylindrical shape, and an inner cylinder 13 fitted in the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b arranged above the large-diameter portion 12a and having an inner diameter and an outer diameter smaller than that of the large-diameter portion 12a, an upper end portion of the large-diameter portion 12a, and a small-diameter portion 12b. And a flange portion 12c connecting the lower end portion. The upper end opening of the small diameter portion 12b is closed by the top wall portion 12d.
The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b arranged above the large-diameter portion 13a and having an inner diameter and an outer diameter smaller than that of the large-diameter portion 13a, and an upper end portion of the large-diameter portion 13a and a small-diameter portion 13b. And a flange portion 13c that connects the lower end portion.

Inside the small diameter portion 13b of the inner cylinder 13, an upper portion of a pipe 15 arranged in the container body A and having a lower end opening located at a bottom portion (not shown) of the container body A is fitted. The flange portion 13c of the inner cylinder 13 is located below the flange portion 12c of the outer cylinder 12. A gap S1 is provided 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, an annular flange portion 13d that protrudes outward in the radial direction is formed in a portion of the outer cylinder 12 that protrudes downward from the large diameter portion 12a. The flange portion 13d is provided in the upper end portion of the mounting cap 3 that is mounted (for example, screwed) on the mouth portion A1 of the container body A, and locks the upper end portion of the mounting cap 3 rotatably around its axis. The flange portion 13d is vertically sandwiched by the mounting cap 3 and the upper end opening edge of the mouth portion A1 of the container body A.
The central axis O1 of the vertical supply cylinder portion 10 formed of the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear with respect to the container axis of the container body A.

A discharge valve 30 that is elastically deformable in the vertical direction is disposed in the upper end portion of the inner cylinder 13.
The discharge valve 30 is fitted in the inner cylinder 13, and is disposed below the base portion 31 that abuts the lower surface of the top wall portion 12 d of the outer cylinder 12, and has a step on the inner peripheral surface of the inner cylinder 13. A valve body 33 that abuts against a valve seat 32 formed in a shape from above, and a hollow spring portion 34 that vertically connects the base portion 31 and the valve body 33 are provided.

The valve body 33 is pressed from above by the hollow spring portion 34 and is in close contact with the valve seat 32. The valve element 33 blocks communication between a space located above the valve seat 32 and a space located below the valve seat 32 in the inner cylinder 13. 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 in the inner cylinder 13 located above the valve seat 32 and the space above the valve seat 32. Also communicates with the space located below.

An annular taper cylinder portion 35 protruding inward is formed in a portion of the inner peripheral surface of the inner cylinder 13 located below the valve seat 32 and above the upper end of the pipe 15. There is. The taper tube portion 35 is gradually reduced in diameter as it goes downward. A ball valve 36, which is seated on the inner peripheral surface of the tapered cylindrical portion 35 so as to be separable from the inner surface of the tapered cylindrical portion 35, is disposed inside the tapered cylindrical portion 35.
The ball valve 36 blocks communication between a space located above the tapered tubular portion 35 and a space located below the tapered tubular portion 35 in the inner cylinder 13. The ball valve 36 rises and separates from the inner peripheral surface of the taper cylinder portion 35, so that the space inside the inner cylinder 13 is located above the taper cylinder portion 35 and below the taper cylinder portion 35. Communicate with the space where

The injection cylinder portion 11 extends in the front-rear direction about the central axis O4. The rear end of the injection cylinder 11 is connected to the front side of the upper end of the vertical supply cylinder 10. The inside of the injection cylinder portion 11 communicates with the inside of the vertical supply cylinder portion 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. The inner discharge hole 17 is opened in the inner cylinder 13 in a space located above the valve seat 32.
A cylinder mounting cylinder 40 that projects forward is formed in a portion of the outer cylinder 12 that is located below the injection cylinder portion 11. The cylinder mounting tube 40 is open toward the front. The lower end of the cylinder mounting cylinder 40 is formed integrally with the flange portion 12c of the outer cylinder 12.

The trigger mechanism T causes the liquid to flow from the inside of the vertical supply cylinder 10 through the inside of the injection cylinder 11 toward the ejection hole 6 side by the rearward movement of the trigger unit 51. The trigger mechanism T includes a trigger portion 51 that is disposed in front of the vertical supply cylinder portion 10 so as to be movable rearward in a forwardly biased state, a piston 52 that moves in the front-rear direction in cooperation with the trigger portion 51, and a piston 52. And a cylinder 53, the inside of which is communicated with the inside of the vertical supply cylinder portion 10.

The cylinder 53 is fitted into the cylinder mounting cylinder 40 and has an outer cylinder portion 60 that is open toward the front, a rear wall portion 61 that closes a rear end opening of the outer cylinder portion 60, and a central portion of the rear wall portion 61. From above, and has a top end cylindrical piston guide 62 having a closed front end.
The outer cylinder portion 60, the piston guide 62, and the cylinder mounting cylinder 40 are arranged coaxially with the cylinder axis O2 extending in the front-rear direction.

The inside of the piston guide 62 is opened rearward, and a protrusion projecting forward from the rear wall of the cylinder mounting cylinder 40 (the small diameter portion 12b of the outer cylinder 12) is fitted into this opening.
The outer peripheral surface of the outer cylinder portion 60 and the inner peripheral surface of the cylinder mounting cylinder 40 are in close contact with each other at both ends in the front-rear direction. An annular gap S2 is provided in an intermediate portion between the outer peripheral surface of the outer cylinder portion 60 and the inner peripheral surface of the cylinder mounting cylinder 40, which is located between both end portions in the front-rear direction.

The outer cylinder portion 60 is formed with a first ventilation hole 63 that connects the inside of the outer cylinder portion 60 and the gap S2. A second vent hole 64 is formed in the flange portion 12c of the outer cylinder 12 so as to communicate the gap S2 and the gap S1 between the flange portion 12c of the outer cylinder 12 and the flange portion 13c of the inner cylinder 13. .. A third vent hole 65 is formed in the flange portion 13c of the inner cylinder 13 to communicate the gap S1 with the large diameter portion 13a of the inner cylinder 13 and the inside of the mounting cap 3.

A cylinder portion 66 is formed on the rear wall portion 61 of the cylinder 53 so as to project rearward and open in the front-rear direction. The tubular portion 66 is formed in a portion of the rear wall portion 61 located above the piston guide 62. The cylinder portion 66 is fitted into a through hole formed in the rear wall of the cylinder mounting cylinder 40 (the small diameter portion 12b of the outer cylinder 12).
Here, a second through hole 67 communicating with the inside of the cylinder portion 66 is formed in the small diameter portion 13b of the inner cylinder 13. The second through hole 67 is open in a space in the inner cylinder 13 that is located below the valve seat 32 and above the tapered cylinder portion 35.

As described above, the inside of the cylinder 53 and the inside of the vertical supply cylinder portion 10 communicate with each other through the inside of the cylinder portion 66 and the second through hole 67. Further, the discharge valve 30 switches communication between the inside of the injection cylinder 11 and the cylinder 53 and its cutoff, and the ball valve 36 switches communication between the inside of the container A and the cylinder 53 and its cutoff.

At the upper end of the cylinder 53, a mounting projection 53a is provided that projects upward and extends rearward. A gap is provided between the mounting projection 53a and the outer peripheral surface of the outer tubular portion 60. The mounting protrusion 53a is formed in a plate shape with the front and back surfaces facing up and down. In the center portion of the mounting protrusion 53a in the left-right direction, a pore that opens rearward, penetrates in the up-down direction, and extends in the front-rear direction is formed. An insertion plate 115, which connects the upper end of the cylinder mounting cylinder 40 and the lower end of the rear of the injection cylinder 11 and has the front and back faces in the left-right direction, is inserted into the pores.

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 diameter larger than that of the connecting portion 70. It is formed in an open tubular shape. The piston 52 is arranged coaxially with the cylinder axis O2.

The piston cylinder 71 is open rearward, the piston main body 72 into which the piston guide 62 is inserted, and the piston main body 72 has a rear end portion that projects outward in the radial direction and has an outer cylinder. And a sliding cylinder portion 73 that comes into close contact with the inner peripheral surface of the portion 60.
The inner diameter of the piston body 72 is larger than the outer diameter of the piston guide 62. A gap is provided between the inner peripheral surface of the piston body 72 and the outer peripheral surface of the piston guide 62.
The sliding cylinder portion 73 gradually increases in diameter from the central portion in the front-rear direction toward the front and the rear, and the lip portions located at both end portions in the front-rear direction slide on the inner peripheral surface of the outer cylinder portion 60. Move.

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 biased forward together with the trigger portion 51 by the elastic plate portion 54, which will be described later, and moves rearward as the trigger portion 51 moves rearward and is pushed into the cylinder 53.

The sliding cylinder portion 73 of the piston 52 closes the first ventilation hole 63 when the trigger portion 51 is located at the frontmost movement position. Then, when the piston 52 moves rearward by a predetermined amount due to the rearward movement of the trigger portion 51, the sliding cylinder portion 73 opens the first ventilation hole 63. As a result, 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 part 51 inclines forward as it goes downward. The trigger portion 51 includes a main plate portion 80 having a front surface that is concavely curved rearward in a side view seen from the left and right, and a pair of side plate portions 81 protruding rearward from both left and right ends of the main plate portion 80. And

A pair of connecting plates 82 extending upward and sandwiching the injection cylinder 11 in the left-right direction is formed at the upper ends of the pair of side plate parts 81. Each of the pair of connecting plates 82 is provided with a rotating shaft portion 83 that protrudes outward in the left-right direction. The rotating shaft portion 83 is located at the upper end portion of the trigger portion 51. The rotating shaft portion 83 is rotatably supported by a bearing portion provided on an upper plate member 84 that covers the upper portion of the injection cylinder portion 11. As a result, the trigger portion 51 is arranged so as to be swingable rearward about the rotation shaft portion 83 at the upper end portion.

A connecting cylinder 85 extending rearward is formed at the upper end of the main plate portion 80. A pair of connecting shafts 86 protruding in the left-right direction toward the inside of the connecting cylinder 85 are formed at the rear portion of the inner peripheral surface of the connecting cylinder 85. 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 connected to each other.
The connecting portion 70 of the piston 52 is connected to the connecting shaft 86 so as to be rotatable about its axis and movable in the vertical direction by a predetermined amount.

The horizontal plate-shaped upper plate member 84 connected to the top wall 12d of the outer cylinder 12 of the vertical supply cylinder 10 is attached to the upper surface of the injection cylinder 11.
Elastic plate portions 54 are formed at both ends in the left-right direction of the upper plate member 84, and have an arcuate shape protruding forward in a side view seen from the left-right direction and extending to the lower side of the injection cylinder portion 11. The elastic plate portion 54 has a concentric arcuate shape in a side view seen from the left and right direction and includes a pair of leaf springs arranged in front and rear.

The lower end portions of the pair of leaf springs are connected to each other via a folded-back portion that has a downward arcuate shape in a side view seen from the left-right direction. A locking piece 54d protruding downward is formed in the folded portion, and the locking piece 54d is inserted from above into a pocket portion (not shown) formed in the side plate portion 81 of the trigger portion 51. ..
Accordingly, the elastic plate portion 54 biases the trigger portion 51 forward through the locking piece 54d and the pocket portion.

The upper end portion of the main plate portion 80 of the trigger portion 51 is in contact with the lower end portion of a relay flange portion 98 of the relay member 4, which will be described later, from behind by the biasing force of the elastic plate portion 54. As a result, the trigger portion 51 is positioned at the foremost movement position.
When the trigger portion 51 is pulled rearward and moved from the frontmost movement position, the locking piece 54d moves rearward, and the elastic plate portion 54 elastically deforms.

The relay member 4 is combined with the ejector body 2 from the front. The relay member 4 is combined with the injection cylinder portion 11 from the front side, and projects from the ejector body 2 to the front side.

The relay member 4 includes a partition wall 90 that covers the front end opening of the injection cylinder portion 11 from the front, a second outer fitting cylinder portion 91 that extends rearward from the partition wall 90, and a relay flange that is provided on the outer peripheral surface of the second outer fitting cylinder portion 91. A portion 98, a mounting tubular portion 92 that extends forward from the partition wall 90, a guide shaft portion 94 that extends forward from the partition wall 90 inside the mounting tubular portion 92, and a reinforcing rib portion 99.

The partition wall 90 has a plate shape extending along a direction orthogonal to the front-rear direction. The partition wall 90 faces the front end of the injection cylinder portion 11 in the front-rear direction. The partition wall 90 is located at the rear end of the mounting cylinder portion 92. A communication hole 95 penetrating in the front-rear direction is provided in the partition wall 90. The communication hole 95 is located above the guide shaft portion 94. The communication hole 95 is arranged inside the mounting tubular portion 92 when viewed from the front-rear direction. An annular space 96 is defined between the guide shaft portion 94 and the mounting cylinder portion 92. The annular space 96 communicates with the inside of the injection cylinder portion 11 through the communication hole 95.

The second outer fitting tubular portion 91 has a tubular shape centered on the central axis O4. That is, the second outer fitting cylinder portion 91 is arranged coaxially with the central axis O4 of the injection cylinder portion 11. The second outer fitting cylinder portion 91 is fitted to the outer peripheral surface of the injection cylinder portion 11.

The relay flange portion 98 is provided at an intermediate portion in the front-rear direction of the second outer fitting cylinder portion 91. The relay flange portion 98 extends from the outer peripheral surface of the second outer fitting cylinder portion 91 toward the outer side in the radial direction of the central axis O4. The position of the relay flange portion 98 in the front-rear direction is substantially the same as the position of the front end edge of the cover body 55 in the front-rear direction.

The mounting cylinder portion 92 has a cylindrical shape centered on a central axis O3 extending in the front-rear direction. The nozzle member 5 is mounted on the mounting cylinder portion 92. The central axis O3 is located below the central axis O4 of the injection cylinder portion 11 and the second outer fitting cylinder portion 91. That is, the mounting cylinder portion 92 is arranged eccentrically downward with respect to the injection cylinder portion 11 and the second outer fitting cylinder portion 91.
In this specification, the direction orthogonal to the central axis O3 in a front view seen from the front-rear direction is called the nozzle radial direction, and the direction along the central axis O3 is called the nozzle circumferential direction.

The guide shaft portion 94 extends forward from a portion of the partition wall 90 located inside the mounting cylinder portion 92. The guide shaft portion 94 is arranged coaxially with the mounting cylinder portion 92. That is, the guide shaft portion 94 is centered on the central axis O3 extending in the front-rear direction. The guide shaft portion 94 has a front end portion that is closed and is formed in a cylindrical shape having a rear opening. However, the shape of the guide shaft portion 94 is not limited to this case, and may be formed into a solid columnar shape, for example. The guide shaft portion 94 is formed so as to be housed inside the mounting cylinder portion 92 without projecting forward of the mounting cylinder portion 92.

A first switching groove 97 is formed on the outer peripheral surface of the guide shaft portion 94 on the front end side and extends linearly in the front-rear direction and opens toward the front. In this embodiment, two first switching grooves 97 are formed at equal intervals in the nozzle circumferential direction.

On the front end surface of the guide shaft portion 94, a concave spin chamber 110 that internally swirls the liquid in the nozzle circumferential direction, and a spin groove 111 that connects the spin chamber 110 and the first switching groove 97 are provided. The spin chamber 110 communicates with the ejection hole 6. The spin chamber 110 is formed so as to be recessed rearward. The spin chamber 110 is formed in a circular shape when viewed from the front when viewed from the front and back. The spin groove 111 is formed so as to extend in the tangential direction of the inner peripheral wall of the spin chamber 110, for example. The spin groove 111 sends the liquid supplied from the first switching groove 97 into the spin chamber 110. As a result, spin that swirls in the circumferential direction of the nozzle in the spin chamber 110 can be applied to the liquid, and the spin-applied liquid can be guided to the ejection holes 6.

The reinforcing rib portion 99 is located between the partition wall 90 and the relay flange portion 98 in the front-rear direction, extends in the front-rear direction, and connects the partition wall 90 and the relay flange portion 98. The reinforcing rib portion 99 has a plate-shaped first rib 99a orthogonal to the left-right direction and a plate-shaped second rib 99b orthogonal to the vertical direction. The first rib 99a extends from the outer peripheral surface of the second outer fitting tubular portion 91 to the outside in the radial direction of the central axis O4. The first rib 99a and the second rib 99b intersect in a cross shape when viewed in the front-rear direction. The first rib 99a and the second rib 99b connect the partition wall 90 and the relay flange portion 98 to each other. Thereby, the reinforcing rib portion 99 reinforces the partition wall 90, the relay flange portion 98, the mounting cylinder portion 92, and the second outer fitting cylinder portion 91.

The nozzle member 5 is mounted on the relay member 4 via the mounting cylinder portion 92, so that the nozzle member 5 is integrally combined with the relay member 4 from the front. In the present embodiment, the nozzle member 5 is combined with the relay member 4 so as to be rotatable in the nozzle circumferential direction around the central axis O3.

The nozzle member 5 is rotated around the central axis O3 with respect to the relay member 4 and is aligned with the jettable position or the jetting regulation position. When the user positions the nozzle member 5 at the ejectable position, the trigger type liquid ejector 1 is in the ejectable state in which the liquid can be ejected. Further, when the user positions the nozzle member 5 at the ejection regulation position, the trigger type liquid ejector 1 is in the ejection regulation state in which the ejection of the liquid is regulated.

The nozzle member 5 includes a plate-shaped nozzle wall portion 100 orthogonal to the front-rear direction, a tubular outer shell tubular portion 104 provided around the central axis O3, a first outer fitting tubular portion 101, and a nozzle tubular portion 102. ..

The nozzle wall portion 100 is arranged to face the front end surface of the guide shaft portion 94. The nozzle wall portion 100 covers the spin chamber 110 and the spin groove 111 located on the front end surface of the guide shaft portion 94. The nozzle wall portion 100 is provided with an ejection hole 6 penetrating in the front-rear direction about the central axis O3. The ejection hole 6 exposes a part of the spin chamber 110 to the front.

The outer shell cylindrical portion 104 has a cylindrical shape that extends frontward and rearward with respect to the nozzle wall portion 100. The outer shell 104 surrounds the first outer fitting cylinder 101 and the nozzle cylinder 102 from the outside in the radial direction of the central axis O3. Thereby, the outer tubular portion 104 protects the first outer fitting tubular portion 101 and the nozzle tubular portion 102.

The first outer fitting cylinder portion 101 extends rearward from the nozzle wall portion 100. The first outer fitting tubular portion 101 is arranged between the outer tubular portion 104 and the nozzle tubular portion 102 in the radial direction of the central axis O3.

The first outer fitting cylinder portion 101 is fitted on the outer peripheral surface of the mounting cylinder portion 92 so as to be rotatable about the central axis O3. Protrusions that extend in the nozzle circumferential direction and engage with each other are provided on the inner peripheral surface of the first outer fitting cylinder portion 101 and the outer peripheral surface of the mounting cylinder portion 92.

The entire length of the first outer fitting tubular portion 101 in the front-rear direction is larger than the overall length of the mounting tubular portion 92 in the front-rear direction. Therefore, the rear end 101a of the first outer fitting cylinder portion 101 extends rearward from the partition wall 90 of the relay member 4. The position of the rear end 101a of the first outer fitting tubular portion 101 in the front-rear direction is the position in the front-rear direction of the injection tubular portion 11 that fits with the second outer fitting tubular portion 91 and the second outer fitting tubular portion 91 of the relay member 4. Overlap. That is, the rear end 101 a of the first outer fitting tubular portion 101 is located rearward of the front end of the injection tubular portion 11.

The nozzle tubular portion 102 extends rearward from the nozzle wall portion 100 inside the first outer fitting tubular portion 101. The inner peripheral surface of the nozzle tubular portion 102 is in close contact with the outer peripheral surface of the guide shaft portion 94 of the relay member 4 so as to be rotatable about the central axis O3. The rear end of the nozzle tubular portion 102 is located rearward of the first switching groove 97 formed on the outer peripheral surface of the guide shaft portion 94. The rear end of the nozzle tube portion 102 faces the partition wall 90 with a gap in the front-rear direction.

The inner peripheral surface of the nozzle tubular portion 102 is formed with a second switching groove 103 that extends linearly in the front-rear direction and opens rearward. In the present embodiment, two second switching grooves 103 are formed at equal intervals in the nozzle circumferential direction. The second switching groove 103 always communicates with the annular space 96. Further, the second switching groove 103 communicates with the first switching groove 97 in a state where the nozzle member 5 is located at the jettable position. On the other hand, the second switching groove 103 is blocked from communicating with the first switching groove 97 in a state in which the nozzle member 5 is located at the ejection regulation position.

In the present embodiment, the nozzle member 5 is located between the first outer fitting cylinder portion 101 and the nozzle cylinder portion 102, extends rearward from the nozzle wall portion 100, and is located inside the mounting cylinder portion 92 at the central axis O3. A seal cylinder portion 105 that is rotatably fitted around the seal cylinder portion 105 is further provided. The outer peripheral surface of the seal cylinder portion 105 is in close contact with the inner peripheral surface of the mounting cylinder portion 92. Accordingly, it is possible to prevent the liquid from entering between the seal cylinder portion 105 and the mounting cylinder portion 92, and to prevent the liquid in the annular space 96 from leaking to the outside. Further, the seal cylinder portion 105 and the first outer fitting cylinder portion 101 sandwich the mounting cylinder portion 92 in the radial direction. As a result, the first outer fitting tubular portion 101 can be fitted into the mounting tubular portion 92 in a more stable state.

According to the trigger type liquid ejector 1 according to the present embodiment, the rear end 101a of the first outer fitting cylinder portion 101 of the nozzle member 5 is located rearward of the front end of the ejection cylinder portion 11. That is, the first outer fitting cylinder portion 101 is fitted to the mounting cylinder portion 92 of the relay member 4 in a state of overlapping the injection cylinder portion 11 in the front-rear direction. Therefore, the mounting cylinder part 92 is supported from the inside by the injection cylinder part 11 and its deformation is suppressed. As a result, the fitting strength against the external force of the first outer fitting tubular portion 101 with respect to the mounting tubular portion 92 is increased. By increasing the fitting strength between the mounting tubular portion 92 and the first external fitting tubular portion 101, it is possible to prevent the nozzle member 5 from coming off the relay member 4 even when an external force is applied.

According to the trigger type liquid ejector 1 according to the present embodiment, the nozzle member 5 extends rearward from the front end of the injection cylinder portion 11, so that the overall length of the nozzle member 5 in the front-rear direction can be increased. That is, according to the present embodiment, the nozzle member 5 can be provided so as to largely project forward from the ejector body 2.
In general, the front end of the nozzle member 5 is arranged in front of the front end of the trigger portion 51. This is to prevent an unexpected external force from being applied to the trigger portion 51 during the storage or flow process, and to prevent the liquid from leaking from the ejection hole 6. On the other hand, the configuration in which the front end of the trigger portion 51 is arranged rearward of the front end of the nozzle member 5 has been a constraint from the viewpoint of increasing the pulling margin of the trigger portion 51 in the front-rear direction.
According to the present embodiment, it is possible to project the nozzle member 5 forward from the ejector body 2 as compared with the conventional structure while suppressing the detachment of the nozzle member 5 from the relay member 4. Along with this, the front end of the trigger portion 51 can be arranged forward, and a large pulling margin of the trigger portion 51 in the front-rear direction can be secured, as compared with the related art. As a result, it is possible to adopt a structure that secures a large stroke of the piston 52, and when such a structure is adopted, it is possible to increase the amount of liquid that can be ejected by one operation of the trigger portion 51. it can.
Further, the trigger portion 51 of the present embodiment is inclined forward as it goes downward, and is arranged so as to be swingable rearward about the rotary shaft portion 83 at the upper end portion. According to the present embodiment, the front end of the trigger portion 51 can be arranged forward as compared with the related art, so that the total length of the trigger portion 51 can be increased as compared with the related art. Thereby, the operating force of the trigger portion 51 can be reduced when operating the tip portion of the trigger portion 51.

According to the trigger type liquid ejector 1 according to the present embodiment, the rear end 101a of the first outer fitting cylinder portion 101 is located behind the partition wall 90 of the relay member 4. That is, the first outer fitting cylinder portion 101 overlaps the partition wall 90 in the front-rear direction. For this reason, the mounting cylinder portion 92 is reinforced by the partition wall 90, and the fitting strength between the mounting cylinder portion 92 and the first outer fitting cylinder portion 101 can be increased.

Further, according to the present embodiment, the second outer fitting cylinder portion 91 is fitted to the outer peripheral surface of the injection cylinder portion 11. For this reason, the relay member 4 is more reliably held with respect to the injection cylinder portion 11, and as a result, the relay member 4 is more effectively reinforced by the injection cylinder portion 11, and the mounting cylinder portion 92 and the first outer fitting cylinder are provided. The strength of fitting with the portion 101 can be increased.

In the relay member having the conventional structure, the position in the front-rear direction of the partition wall matches the position in the front-rear direction of the relay flange portion. On the other hand, in the relay member 4 of the present embodiment, the partition wall 90 is arranged in front of the relay flange portion 98. Since the partition wall 90 is provided at the front, the total length of the mounting cylinder portion 92 can be shortened. As a result, sink marks of the mounting cylinder portion 92 during molding are suppressed, and the dimensional accuracy of the front end of the mounting cylinder portion 92 can be increased. As a result, the fitting strength between the mounting tubular portion 92 and the first outer fitting tubular portion 101 can be increased.

Further, according to the present embodiment, the partition wall 90 is provided on the more front side as compared with the conventional structure, so that the capacity of the annular space 96 provided in front of the partition wall 90 can be reduced. The annular space 96 is a liquid flow path that connects the ejection cylinder 11 and the ejection hole 6. Therefore, when the volume of the annular space 96 increases, the pressure loss of the liquid increases. According to the above configuration, by reducing the volume of the annular space 96, the pressure loss of the liquid can be reduced, and the liquid can be ejected from the ejection holes 6 with a small operating force.
It should be noted that, by providing the partition wall in the front, the overall length of the injection cylinder portion 11 is increased and the pressure loss of the liquid passing through the injection cylinder portion 11 is increased as compared with the conventional structure. However, since the injection cylinder portion 11 is a pipe line extending in one direction, the increase in pressure loss due to the increase in the entire length is sufficiently smaller than the decrease in pressure loss due to the decrease in the capacity of the annular space 96. .. Therefore, as described above, the effect of reducing the pressure loss in the entire liquid flow path can be obtained.

The relay member 4 of the present embodiment is provided with a reinforcing rib portion 99 that connects the partition wall 90 and the relay flange portion 98. That is, the relay member 4 is reinforced by the reinforcing rib portion 99 and deformation of the mounting cylinder portion 92 is suppressed. As a result, the fitting strength between the mounting tubular portion 92 and the first outer fitting tubular portion 101 can be increased.

(Operation of trigger type liquid ejector)
Next, a case where the trigger type liquid ejector 1 configured as described above is used will be described. It is assumed that the trigger portion 51 is filled with the liquid by a plurality of operations of the trigger portion 51 so that the liquid can be sucked up from the vertical supply cylinder portion 10. Further, it is assumed that the nozzle member 5 is positioned at the jettable position.

When the trigger portion 51 is pulled rearward against the biasing force of the elastic plate portion 54, the piston 52 retracts as the trigger portion 51 moves rearward. Along with this, the liquid in the cylinder 53 is introduced into the inner cylinder 13 of the vertical supply cylinder 10 through the cylinder 66 and the second through hole 67. The liquid introduced into the inner cylinder 13 pushes down the ball valve 36 to close the valve, and pushes up the discharge valve 30 to open the valve, and is pressurized into the injection cylinder portion 11 through the inner discharge hole 17 and the outer discharge hole 16. Supplied in the closed condition.

The liquid supplied into the injection cylinder portion 11 is supplied to the ejection hole 6 through the communication hole 95, the annular space 96, the second switching groove 103 and the first switching groove 97, the spin groove 111 and the spin chamber 110, and is directed forward. It is ejected toward. Since the liquid is ejected from the ejection hole 6 in a state of swirling around the central axis O3 in the spin chamber 110, the liquid is ejected in a mist form from the ejection hole 6.

When the trigger portion 51 is released after the liquid has been ejected, the elastic restoring force of the elastic plate portion 54 urges the trigger portion 51 forward and returns to the original position. Along with this, the piston 52 moves forward, so that a negative pressure is generated in the cylinder 53. Due to this negative pressure, the discharge valve 30 is closed and the ball valve 36 is pushed up and opened, and the liquid in the container body A is sucked up to the vertical supply cylinder 10 through the pipe 15 and introduced into the cylinder 53. .. This makes it possible to prepare for the next jet.

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

DESCRIPTION OF SYMBOLS 1 Trigger type liquid ejector 2 Ejector main body 4 Relay member 5 Nozzle member 6 Ejection hole 10 Vertical supply cylinder part 11 Injection cylinder part 51 Trigger part 83 Rotating shaft part 90 Partition wall 91 Second external fitting cylinder part 92 Mounting cylinder part 98 Relay Flange portion 99 Reinforcement rib portion 101 First outer fitting cylinder portion A Container body T Trigger mechanism

Claims (4)

An ejector body mounted on a container body containing a liquid,
A relay member protruding forward from the ejector body,
A nozzle member which is combined with the relay member from the front side and in which a jet hole for jetting a liquid is formed,
The ejector body is
A vertical supply cylinder portion that extends in the vertical direction and sucks up the liquid in the container body;
An injection cylinder part which is disposed in front of the vertical supply cylinder part and which causes the liquid in the vertical supply cylinder part to flow toward the ejection hole side,
A trigger portion is provided in front of the vertical supply cylinder portion so as to be movable rearward in a front-biased state, and by moving the trigger portion rearward, liquid is moved from inside the vertical supply cylinder portion into the ejection cylinder portion. A trigger mechanism for causing the fluid to flow toward the ejection hole side through
The relay member includes a mounting cylinder portion that extends in the front-rear direction and in which the nozzle member is mounted,
The nozzle member includes a first external fitting tubular portion that fits on an outer peripheral surface of the mounting tubular portion,
A rear end of the first outer fitting cylinder portion is located rearward of a front end of the injection cylinder portion,
Trigger type liquid ejector. The relay member is
A partition wall located at the rear end of the mounting cylinder portion and facing the front end of the injection cylinder portion in the front-rear direction;
A second outer fitting cylinder portion that extends rearward from the partition wall and fits into an outer peripheral surface of the injection cylinder portion,
The trigger type liquid ejector according to claim 1. The relay member is
A relay flange portion provided on the outer peripheral surface of the second outer fitting cylinder portion;
A reinforcing rib portion that extends in the front-rear direction and connects the partition wall and the relay flange portion,
The trigger type liquid ejector according to claim 2. The trigger portion is inclined forward as it goes downward, and is arranged so as to be swingable rearward about the rotation shaft portion of the upper end,
The trigger type liquid ejector according to any one of claims 1 to 3.

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