JP2023098189A - trigger type liquid ejector - Google Patents

Abstract

To provide a trigger type liquid ejector which prevents contact between an energizing a piston and liquid, and continuously ejects the liquid.SOLUTION: A trigger type liquid ejector 1 comprises a trigger mechanism 80 that has a trigger part 81 which is so located as to be movable backward in a forward energized state, and that circulates the liquid toward an ejection hole side from an interior of a vertical supply cylinder part by a backward movement of the trigger part 81. The trigger mechanism 80 comprises: a main cylinder 82 which opens forward and of which a rear part communicates with the interior of the vertical supply cylinder part; a main piston 83 having a slide part 85, which is so located in the main cylinder 82 as to be movable in a cross direction, and a protrusion 86 which projects forward toward an exterior of the main cylinder 82 from the slide part 85 and of which a front end part 86a is connected to the trigger part 81; and a coil spring 84 into which the protrusion 86 of the main pinson 83 is inserted, and which energizes the tripper part 81 forward.SELECTED DRAWING: Figure 2

Description

The present invention relates to trigger-type liquid ejectors.

A trigger-type liquid ejector is known that sucks up liquid from a container body by operating a trigger part and ejects the liquid through an ejection hole. The trigger-type liquid ejector described in Patent Document 1 below includes a piston that moves back and forth along with the movement of the trigger section, and the interior is pressurized and decompressed along with the movement of the piston, and the interior is in the vertical supply cylinder section. and a biasing member arranged inside the cylinder and biasing the trigger portion forward via the piston.

Furthermore, the trigger-type liquid ejector described in Patent Document 1 below includes a storage cylinder into which the liquid that has passed through the vertical supply cylinder portion is supplied by rearward movement of the trigger portion, and a storage cylinder disposed in the storage cylinder. and a reservoir plunger that moves in one axial direction and is biased in the other axial direction as the liquid is supplied into the reservoir cylinder, so that the liquid can be continuously ejected. It is

JP 2021-159841 A

The trigger-type liquid ejector is required to continuously eject various types of liquids, such as hypochlorite-containing fungicides used in bathrooms. However, depending on the type of liquid, the biasing member in contact with the liquid deteriorates, slowing the movement of the piston and the operation of the trigger part, and the liquid itself may deteriorate due to contact with the biasing member. .

SUMMARY OF THE INVENTION 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 capable of continuously ejecting liquid by suppressing contact between an urging member that urges a trigger portion and the liquid. is to provide

(1) A trigger-type liquid ejector according to the present invention comprises an ejector main body attached to a container containing a liquid, and a nozzle member attached to the ejector main body and formed with an ejection hole for ejecting the liquid. and, the ejector body has a vertical supply tube portion for sucking up the liquid in the container body, and a trigger portion disposed so as to be movable rearward in a forwardly biased state, and is behind the trigger portion. A trigger mechanism that circulates liquid from the inside of the vertical supply tube portion toward the ejection hole side by moving to the rear, and a liquid that has passed through the vertical supply tube portion is supplied to the inside by the movement of the trigger portion to the rear. and a storage cylinder disposed within the storage cylinder so as to be movable in the axial direction along the central axis of the storage cylinder, and directed toward one of the axial directions as the liquid is supplied into the storage cylinder. and a reservoir plunger that moves toward the other side and is urged toward the other side, the trigger mechanism comprising a main cylinder that opens forward and whose rear end communicates with the interior of the vertical supply cylinder, and the main cylinder. a sliding portion disposed movably in the longitudinal direction inside the main cylinder; and a protrusion projecting forward from the sliding portion toward the outside of the main cylinder and having a front end connected to the trigger portion. and a biasing member into which the protrusion of the main piston is inserted to bias the trigger forward.

According to the trigger-type liquid ejector of the present invention, the liquid can be circulated from the vertical supply tube portion toward the ejection hole side by operating the trigger portion to move it backward. As a result, the liquid can be ejected outward through the ejection holes of the nozzle member. Moreover, the inside of the storage cylinder can be pressurized by supplying the liquid from the vertical supply tube portion into the storage cylinder. Therefore, the storage plunger can be pushed toward one side in the axial direction against the urging force directed to the other side in the axial direction, and the storage plunger moves toward the one side in the axial direction while ejecting the liquid. can be made Therefore, every time the trigger portion is pulled, the reservoir plunger is moved to one side in the axial direction, and the liquid can be ejected while the reservoir cylinder is being filled with liquid.
When the operation of the trigger portion is stopped after the storage cylinder is filled with the liquid, the supply of the liquid into the storage cylinder through the vertical supply cylinder portion is stopped. Begin to restore and move. As a result, the liquid filled in the storage cylinder can be pushed out from the storage cylinder toward the ejection hole side, and can be ejected from the ejection hole. Therefore, it is possible to continuously eject the liquid.

By the way, the trigger portion is biased forward by a biasing member. In particular, inside the urging member, a projection of the main piston is inserted that protrudes outward from an opening in front of the main cylinder and has a front end connected to the trigger. Therefore, the biasing member can be arranged outside the space surrounded by the main cylinder and the main piston to bias the trigger portion.
As a result, the liquid sucked into the interior of the main cylinder does not come into contact with the biasing member and react therewith. Therefore, it is possible to prevent the deterioration of the urging member and the deterioration of the liquid, thereby providing a trigger-type liquid ejector suitable for continuous liquid ejection.

(2) A spring receiver may be provided in the front opening of the main cylinder to receive the rear end of the biasing member.

In this case, the spring receiver can be attached to the front opening of the main cylinder, and the biasing member can be arranged between the spring receiver and the trigger. In addition, the spring retainer can restrict the main piston from coming out of the front opening of the main cylinder.

(3) The spring receiver may include a pair of side wall portions sandwiching the biasing member in the left-right direction.

In this case, the urging member arranged outside the space surrounded by the main cylinder and the main piston is sandwiched between the pair of left and right side walls to make it difficult to see from the outside and improve the design. Further, the pair of left and right side wall portions can suppress adhesion of liquid, etc., scattered by the spray to the urging member.

(4) The spring receiver may include an inner cylindrical portion inserted into the main cylinder, and a receiving portion formed inside the inner cylindrical portion for receiving the rear end of the biasing member. .

In this case, since the inner cylindrical portion of the spring receiver is inserted into the main cylinder, the spring receiver can be easily attached to the main cylinder. In addition, the inner cylindrical portion inserted inside the main cylinder can restrict the forward removal of the main piston that slides inside the main cylinder.

According to the trigger-type liquid ejector of the present invention, the liquid can be continuously ejected by suppressing contact between the liquid and the biasing member that biases the trigger.

1 is a vertical cross-sectional view of a trigger-type liquid ejector according to one embodiment of the present invention; FIG. FIG. 2 is an enlarged view of a main part of the trigger-type liquid ejector shown in FIG. 1; 1 is a front view of a trigger-type liquid ejector according to one embodiment of the present invention; FIG. 1 is a side view of a trigger-type liquid ejector according to one embodiment of the present invention; FIG. FIG. 4 is a side view showing a state in which the trigger part of the trigger-type liquid ejector according to one embodiment of the present invention is pulled;

MODE FOR CARRYING OUT THE INVENTION An embodiment of a trigger type liquid ejector according to the present invention will be described below with reference to the drawings. In this embodiment, an ejection container in which a trigger-type liquid ejector is attached to a container body will be described as an example.

As shown in FIG. 1, a trigger-type liquid ejector 1 of this embodiment includes an ejector body 2 attached to a container body A containing liquid, and ejection holes 4 for ejecting liquid. 2, and a cover body 5 that covers the ejector main body 2 and the nozzle member 3.
Note that each component of the trigger type liquid ejector 1 is a molded product using synthetic resin unless otherwise specified.

(ejector body)
The ejector main body 2 includes a vertical supply cylinder portion 10, a connection cylinder portion 20, a mounting cap 30, a reservoir cylinder 40, a reservoir plunger 50, a plunger biasing member 60, an injection cylinder portion 70, and a trigger mechanism 80. , a ball valve 90 , and a storage valve 91 .

In the present embodiment, the central axis of the vertical supply tube portion 10 is defined as the axis O1, the container body A side along the axis O1 is called the lower side, the opposite side is called the upper side, and the direction along the axis O1 is called the vertical direction. In addition, in a plan view from the vertical direction, one direction intersecting with the axis O1 is referred to as the front-rear direction, and a direction orthogonal to both the vertical direction and the front-rear direction is referred to as the left-right direction.

Furthermore, in this embodiment, the central axis of the storage cylinder 40 is the axis O2. In this embodiment, the axis O2 extends in the front-rear direction. Therefore, in this embodiment, the front-rear direction corresponds to the axial direction along the central axis of the storage cylinder 40 .
In this embodiment, the rear side corresponds to one side of the axial direction along the central axis of the storage cylinder 40, and the front side corresponds to the other side of the axial direction along the central axis of the storage cylinder 40. However, the axial direction along the axis O2 does not have to coincide with the front-rear direction.

The vertical supply tube portion 10 extends vertically and has a function of sucking up the liquid in the container body A. As shown in FIG.
The vertical supply tube portion 10 is attached to the container body A with an attachment cap 30 . The upper portion of a pipe 11 that extends vertically and sucks liquid from the container body A is fitted to the vertical supply tube portion 10 .

As shown in FIG. 1 , a connection tube portion 20 extending forward is provided at the upper end portion of the vertical supply tube portion 10 .
The connection tube portion 20 is formed in a tubular shape having an opening 21 that opens to the front of the ejector main body 2 and communicates with the vertical supply tube portion 10 . A blocking plug 100 is attached to the opening 21 of the connecting tubular portion 20 to close (seal) the opening 21 .

A cylinder tube portion 110 is provided below the connection tube portion 20 and above the mounting cap 30 . The cylinder tube portion 110 protrudes forward from the vertical supply tube portion 10 and opens forward. A main cylinder 82 is fitted in the cylindrical portion 110 . The main cylinder 82 is formed in a bottomed cylindrical shape that is open forward and closed rearward. The inside of the main cylinder 82 communicates with the inside of the vertical supply tubular portion 10 .

The storage cylinder 40 is arranged above the vertical supply tube portion 10 and the connection tube portion 20 .
In this embodiment, the lower end portion of the storage cylinder 40 is formed integrally with the upper end portion of the vertical supply tubular portion 10 and the upper end portion of the connecting tubular portion 20 .
The inside of the storage cylinder 40 (storage space 40a, which will be described later) is supplied with the liquid that has passed through the vertical supply cylinder portion 10 and the connection cylinder portion 20 due to the rearward swinging of the trigger portion 81 .
Specifically, a supply hole 41 that communicates with the inside of the connection tube portion 20 is formed in the lower portion of the front end portion of the storage cylinder 40 . In addition, the supply hole 41 opens in a portion located behind a blocking plug 100, which will be described later. As a result, the liquid that has passed through the vertical supply tubular portion 10 and the connection tubular portion 20 can be supplied into the storage cylinder 40 through the supply hole 41 .

The storage plunger 50 is arranged in the storage cylinder 40 so as to be movable in the longitudinal direction along the axis O2. Thereby, the storage plunger 50 closely slides in the storage cylinder 40 in the front-rear direction.
The storage plunger 50 moves rearward as the liquid is supplied into the storage cylinder 40 . The storage plunger 50 blocks the communication between the vertical supply cylinder portion 10 and the ejection hole 4 through the connection cylinder portion 20, and when it moves backward, the vertical supply cylinder portion 10 through the connection cylinder portion 20 is closed. and the ejection hole 4 are allowed to communicate with each other.
In other words, the storage plunger 50 blocks the communication between the vertical supply cylinder portion 10 through the connection cylinder portion 20 and the ejection hole 4 (injection cylinder portion 70) at the forwardmost position, and moves backward from the forwardmost position. When this is done, communication between the inside of the vertical supply cylinder portion 10 and the jet hole 4 (inside the injection cylinder portion 70) through the inside of the connection cylinder portion 20 is allowed. In addition, in the storage cylinder 40, a space located forward of the storage plunger 50 functions as a storage space 40a.

The storage space 40 a stores the liquid that has passed through the vertical supply tube portion 10 and the connection tube portion 20 and has passed through the supply hole 41 . The storage space 40a expands as the storage plunger 50 moves rearward due to the supply of liquid. Note that the storage space 40a can also communicate with the injection cylinder portion 70, which will be described later.

The plunger biasing member 60 biases the storage plunger 50 forward. The plunger biasing member 60 is arranged behind the reservoir plunger 50 within the reservoir cylinder 40 . The plunger biasing member 60 biases the storage plunger 50 forward in the initial state before the trigger part 81 is operated. Thereby, the storage plunger 50 is located at the forwardmost position.
The plunger urging member 60 is a metal coil spring arranged coaxially with the axis O2. However, for example, a resin spring may be used as the plunger biasing member 60, or another elastic member may be used.

In the storage cylinder 40 and the storage plunger 50 configured as described above, it is possible to pressurize the liquid in the storage space 40a until the storage plunger 50 moves backward. After that, when the hydraulic pressure in the storage space 40a reaches a predetermined value, the storage plunger 50 moves backward against the plunger biasing member 60. As shown in FIG. Thereby, the liquid in the storage space 40a can be supplied to the ejection hole 4 side.
Therefore, the reservoir plunger 50 can function as a pressure accumulation valve.

The injection cylinder part 70 extends forward from the storage cylinder 40 . The injection cylinder portion 70 communicates with the inside of the vertical supply cylinder portion 10 through the inside of the storage cylinder 40 (the storage space 40 a ) and the inside of the connection cylinder portion 20 . As a result, the injection cylinder portion 70 can guide the liquid that has passed through the vertical supply cylinder portion 10 , the connection cylinder portion 20 , and the storage cylinder 40 (the storage space 40 a ) to the ejection hole 4 .

The trigger mechanism 80 includes a trigger portion 81, a main cylinder 82, a main piston 83, and a coil spring 84 (biasing member). The trigger mechanism 80 allows the liquid to circulate from the vertical supply tube portion 10 through the connection tube portion 20 toward the ejection hole 4 side by swinging the trigger portion 81 backward.

The trigger part 81 is arranged in front of the vertical supply tube part 10 so as to be movable rearward in a forward biased state. The trigger part 81 is formed to extend in the vertical direction and is arranged below the injection tube part 70 . The trigger part 81 has an upper end pivotally supported by the nozzle member 3 so as to be able to swing in the front-rear direction, and a lower end arranged in front of the main cylinder 82 .

In the illustrated example, a stopper T is provided in the longitudinal gap between the trigger portion 81 and the main cylinder 82 . The stopper T abuts against the trigger portion 81 and the main cylinder 82 to restrict the rearward swinging of the trigger portion 81 . However, the stopper T is not essential and may be omitted.

The main piston 83 is arranged inside the main cylinder 82 so as to be movable in the front-rear direction. The main piston 83 is movable in the front-rear direction in conjunction with the rocking motion of the trigger portion 81 . As a result, the inside of the main cylinder 82 is pressurized and depressurized as the main piston 83 moves in the front-rear direction. Note that the main piston 83 is formed in a capped tubular shape that is open rearward and closed frontward.

The main piston 83 is urged forward through the trigger portion 81 by the urging force of the coil spring 84 . The main piston 83 moves rearward and is pushed into the main cylinder 82 as the trigger portion 81 swings rearward. Note that the main piston 83 is positioned at the forwardmost position corresponding to the trigger portion 81 being at the forwardmost swing position.

The coil spring 84 is made of metal, for example. A coil spring 84 is arranged coaxially with the main piston 83 and the main cylinder 82 and biases the trigger portion 81 to which the main piston 83 is connected forward. The coil spring 84 is arranged between the spring receiver 130 (spring receiver) attached to the front opening of the main cylinder 82 and the trigger portion 81 .
However, the material of the coil spring 84 is not limited to metal, and for example, a resin spring or the like may be used.

The ball valve 90 and the storage valve 91 are provided inside the vertical supply tubular portion 10 .
The ball valve 90 cuts off the communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tubular portion 10 when the inside of the main cylinder 82 is pressurized, and when the inside of the main cylinder 82 is decompressed, the ball valve 90 is directed upward. By being displaced, it serves as a check valve that allows communication between the inside of the container body A and the inside of the main cylinder 82 through the inside of the vertical supply tube portion 10 .

A reservoir valve 91 is arranged above the ball valve 90 . The storage valve 91 allows liquid to be supplied from the vertical supply cylinder portion 10 through the connection cylinder portion 20 into the storage cylinder 40, and allows the liquid to flow from the storage cylinder 40 through the connection cylinder portion 20 into the vertical supply cylinder portion 10. It is a check valve that regulates the outflow of liquid inside.

The cover body 5 is formed so as to cover the entire vertical supply cylinder portion 10 except for the lower end portion, the entire injection cylinder portion 70, and the entire storage cylinder 40 at least from both sides in the left-right direction and from above.

(Nozzle member)
The nozzle member 3 is assembled to the ejector main body 2 mainly using the ejection cylinder portion 70 .
The nozzle member 3 includes a mounting cylinder portion 120 externally fitted onto the injection cylinder portion 70 from the front, a nozzle shaft portion 121 positioned inside the front end portion of the mounting cylinder portion 120, and a nozzle cap mounted on the nozzle shaft portion 121. 122 and . The nozzle cap 122 is formed with a jet hole 4 that opens forward and jets liquid forward.

(coil spring)
In the trigger type liquid ejector 1 configured as described above, the arrangement of the coil spring 84 and the structure around the coil spring 84 will be described.

As shown in FIG. 2, a bottomed cylindrical main cylinder 82 that opens forward is provided with a cylindrical guide cylinder 82a that protrudes forward from the central portion of the rear wall portion. The front end of the guide tube 82a is positioned rearward of the front end of the main cylinder 82. As shown in FIG. The bottom portion of the guide tube 82a is formed in an annular shape, and the fitting tube portion 111 provided on the cylinder tube portion 110 is fitted inside. A front end portion of the fitting tube portion 111 protrudes inside the guide tube 82a. The guide tube 82a is arranged coaxially with the fitting tube portion 111 .

In this embodiment, the central axis of the main cylinder 82, the guide tube 82a, the cylinder tube portion 110, and the fitting tube portion 111 extending along the front-rear direction is the axis O3. Furthermore, in a plan view seen from the direction of the axis O3, the direction intersecting with the axis O3 is called the radial direction, and the direction rotating around the axis O3 is called the circumferential direction.

The main piston 83 has a sliding portion 85 arranged movably in the longitudinal direction inside the main cylinder 82, and a front end portion 86a of the sliding portion 85 protruding forward from the sliding portion 85 toward the outside of the main cylinder 82 as a trigger portion. a projection 86 connected to 81; The sliding portion 85 is annularly provided at the rear end portion of the main piston 83 having a cylindrical shape with a top. Inside the sliding portion 85, a guide tube 82a is inserted.

The sliding portion 85 includes an inner lip portion 85a that slides on the outer peripheral surface of the guide cylinder 82a, a lip connecting portion 85b that extends radially outward from the inner lip portion 85a, and a lip connecting portion 85b that extends radially outward from the lip connecting portion 85b. and an outer lip portion 85 c that is continuously provided and is in sliding contact with the inner peripheral surface of the main cylinder 82 . The rear end portion of the inner lip portion 85a extends radially inward and is in sliding contact with the outer peripheral surface of the guide tube 82a. Thereby, a sealing property is ensured between the inner lip portion 85a and the outer peripheral surface of the guide tube 82a.

The lip connecting portion 85b is formed in an annular shape that radially connects the inner lip portion 85a and the outer lip portion 85c. A front surface of the lip connecting portion 85b is formed in a flat shape. The outer lip portions 85c are formed as a pair of front and rear lip portions 85c, each having a diameter that expands forward and rearward from the outer peripheral end of the lip connecting portion 85b, and are in sliding contact with the inner peripheral surface of the main cylinder 82. As shown in FIG. As a result, the seal between the outer lip portion 85c and the inner peripheral surface of the main cylinder 82 is ensured.

A projection 86 of the main piston 83 extends forward from the front end of the inner lip portion 85 a and protrudes outward from the front opening of the main cylinder 82 . A pair of recessed portions 86b recessed in the left-right direction are formed in a front end portion 86a of the protrusion 86. As shown in FIG. The recessed portion 86b extends in the vertical direction and is formed in a generally arcuate or generally half-moon shape that protrudes rearward. A connecting shaft 81d provided on the trigger portion 81 is inserted into the recessed portion 86b from the left and right.

The trigger part 81 includes a pair of left and right side walls 81a, a front wall 81b connecting between the pair of left and right side walls 81a, and a plurality of parts connecting between the front wall 81b and the pair of left and right side walls 81a on the rear side of the front wall 81b. and a reinforcing rib 81c. An opening 81A is formed in the front wall 81b. A connecting shaft 81d is provided in the opening 81A and connected to the front end 86a of the projection 86 inserted into the opening 81A.

The coil spring 84 is arranged outside the space surrounded by the main cylinder 82 and the main piston 83, and is attached with the trigger portion 81 facing forward with the protrusion 86 of the main piston 83 inserted inside. I am gaining momentum. A front end of the coil spring 84 is in contact with the trigger portion 81 . In this embodiment, the front end of the coil spring 84 contacts the rear ends of the pair of left and right side walls 81a of the trigger portion 81, the rear ends of the reinforcing ribs 81c arranged below the opening 81A, and the like.

A spring receiver for receiving the front end of the coil spring 84 in a plane may be provided on the rear side of the trigger portion 81 . However, since the protrusion 86 of the main piston 83 is inserted inside the coil spring 84 and its posture is regulated, the front end of the coil spring 84 strikes the trigger portion 81 obliquely as in the present embodiment. There is no problem even if they are in contact with each other. Moreover, there is no problem even if the coil spring 84 is arranged so as to be curved at the intermediate portion in the front-rear direction.

A spring receiver 130 for receiving the rear end of the coil spring 84 is attached to the front opening of the main cylinder 82 . The spring receiver 130 is formed in an annular shape coaxial with the axis O3. The spring receiver 130 is connected to an inner cylindrical portion 131 inserted into the main cylinder 82 and connected to the inner cylindrical portion 131, extends to the radially outer side of the cylinder cylindrical portion 110, and and a locking portion 132 that locks to the outside of 110 .

The locking portion 132 includes an extension portion 132a extending upward from the upper front end portion of the inner cylindrical portion 131, and an insertion portion 132b extending rearward from the upper end portion of the extension portion 132a. The upper end portion of the extension portion 132 a extends above the upper end portion of the cylinder tube portion 110 . The insertion portion 132 b is inserted into a gap between the cylinder tube portion 110 and the connecting tube portion 20 on the radially outer side of the cylinder tube portion 110 . A step facing the blocking plug 100 in the front-rear direction is provided on the upper surface side of the insertion portion 132b.

The inner tubular portion 131 is inserted inside the main cylinder 82 and extends rearward from a position where it is connected to the locking portion 132 . The outer peripheral surface of the inner cylindrical portion 131 is arranged with a gap from the entire circumference of the inner peripheral surface of the main cylinder 82 . That is, the inner cylindrical portion 131 is suspended via the locking portion 132 and positioned in the front-rear direction. A rear end portion 131 a of the inner cylindrical portion 131 has a slightly reduced diameter with respect to the inner peripheral surface of the main cylinder 82 .

A rear end portion 131a of the inner cylindrical portion 131 faces the lip connecting portion 85b in the front-rear direction, and restricts the main piston 83 from coming off forward. A groove portion 133 extending in the front-rear direction is formed on the outer peripheral surface of the inner cylindrical portion 131 . The groove portion 133 is formed at least at a lower portion of the outer peripheral surface of the inner cylindrical portion 131 with a constant depth. The groove portion 133 forms a gap extending in the front-rear direction between the outer peripheral surface of the inner cylindrical portion 131 and the inner peripheral surface of the main cylinder 82 . The gap extends to the front opening of the main cylinder 82 .

A projecting portion 86 of the main piston 83 is inserted inside the inner cylindrical portion 131 in the front-rear direction. A receiving portion 134 for receiving the rear end of the coil spring 84 is formed inside the inner cylindrical portion 131 . The receiving portion 134 is a step formed on the front side of the rear end portion 131a of the inner cylindrical portion 131, and is formed in an annular shape coaxial with the axis O3.

A pair of side wall portions 135 that sandwich the coil spring 84 in the left-right direction project forward from the spring receiver 130 configured as described above. A pair of side wall portions 135 cover the coil spring 84 from both left and right sides. The pair of side wall portions 135 extend in the front-rear direction along the coil spring 84, and the front end portions thereof are arranged to sandwich the trigger portion 81 in the left-right direction. As shown in FIG. 3, the pair of side wall portions 135 is a plate member having a thickness in the left-right direction, and guides the pair of left and right side walls 81a of the trigger portion 81 in the front-rear direction.

(Action of trigger-type liquid ejector)
Next, the case of using the trigger type liquid ejector 1 configured as described above will be described. First, movement restriction of the trigger portion 81 by the stopper T is released from the state shown in FIG. Next, as shown in FIG. 5, the trigger portion 81 is pulled backward against the biasing force of the coil spring 84 (see FIG. 1). By operating the trigger part 81 a plurality of times, each part of the trigger type liquid ejector 1 is filled with liquid, and the vertical supply tube part 10 is in a state where the liquid can be sucked up.

When the trigger portion 81 is pulled rearward against the urging force of the coil spring 84, the main piston 83 moves rearward from the forwardmost position, and the inside of the main cylinder 82 is pressurized. Thereby, the liquid in the main cylinder 82 is supplied to the vertical supply tubular portion 10 . The liquid supplied to the vertical supply tubular portion 10 presses the ball valve 90 downward and pushes up the reservoir valve 91 .

Thereby, the liquid in the vertical supply tube portion 10 can be supplied to the storage space 40a of the storage cylinder 40 through the connection tube portion 20 and the supply hole 41, and the storage space 40a can be pressurized. Therefore, as the storage space 40a is pressurized, the storage plunger 50 can be moved backward from the most advanced position against the biasing force of the plunger biasing member 60, and the liquid is stored in the storage space 40a ( filling). By moving the storage plunger 50 rearward, the liquid in the storage space 40 a whose pressure has increased can be guided to the ejection hole 4 through the injection cylinder portion 70 . As a result, the liquid can be ejected forward from the ejection holes 4 .

As described above, each time the trigger part 81 is pulled backward, the liquid can be ejected from the ejection hole 4, and the storage plunger 50 can be moved backward to store the liquid in the storage space 40a. can be done.

After that, when the trigger portion 81 is released, the elastic restoring force (biasing force) of the coil spring 84 causes the trigger portion 81 to restore and move forward. Move inside forward and restore. Therefore, the pressure in the main cylinder 82 can be reduced to a pressure lower than the pressure in the container body A, so that the ball valve 90 can be raised while the storage valve 91 remains closed. Therefore, the liquid in the container body A can be sucked up into the vertical supply tubular portion 10 and introduced into the main cylinder 82 .
This makes it possible to prepare for the next ejection.

When the operation of the trigger portion 81 toward the rear is stopped, the supply of the liquid to the storage space 40a through the vertical supply cylinder portion 10 and the connection cylinder portion 20 is stopped, but the urging force of the plunger urging member 60 is stopped. , the storage plunger 50 begins to move forward toward the most advanced position.
At this time, the storage valve 91 regulates the outflow of the liquid from the storage space 40 a into the vertical supply tube portion 10 .

As a result, the liquid accumulated in the storage space 40 a can be guided to the ejection hole 4 through the ejection cylinder portion 70 and the liquid can be continuously ejected forward through the ejection hole 4 .
Thus, the liquid can be ejected not only when the trigger part 81 is pulled backward, but also when the trigger part 81 is not operated, and the liquid can be continuously ejected.

As described above, according to the trigger-type liquid ejector 1 of the present embodiment, liquid is ejected not only when the trigger part 81 is pulled backward, but also when the trigger part 81 is not operated. and a continuous jet of liquid can be produced.
The trigger portion 81 has an upper end portion (fulcrum) pivotally supported by the nozzle member 3 so as to be able to swing, and a main piston 83 is connected to an intermediate portion (action point) of the trigger portion 81. Therefore, for example, the trigger portion 81 The main piston 83 can be efficiently moved by operating the lower end (force point) of the , utilizing the so-called principle of leverage. Therefore, the operability of the trigger part 81 can be improved.

Furthermore, according to the trigger-type liquid ejector 1 of the present embodiment, as shown in FIG. 2, the trigger part 81 is biased forward by the coil spring 84 .
In particular, inside the coil spring 84, a protrusion 86 of the main piston 83 is inserted, protruding outward from a front opening of the main cylinder 82 and having a front end 86a connected to the trigger 81. As shown in FIG. Therefore, the coil spring 84 can be arranged outside the space surrounded by the main cylinder 82 and the main piston 83 to bias the trigger portion 81 .
As a result, the liquid sucked into the main cylinder 82 does not come into contact with the coil spring 84 and react. Therefore, deterioration of the coil spring 84 and deterioration of the liquid can be prevented, and the trigger-type liquid ejector 1 suitable for continuous liquid ejection can be provided.

As described above, the trigger-type liquid ejector 1 according to the present embodiment includes the ejector main body 2 attached to the container body A containing the liquid, and the ejection holes 4 attached to the ejector main body 2 and ejecting the liquid. is formed, the ejector main body 2 includes a vertical supply cylinder portion 10 for sucking up the liquid in the container body A, and a trigger portion arranged so as to be movable backward in a forward biased state. 81 , and the rearward movement of the trigger portion 81 circulates the liquid from the vertical supply cylinder portion 10 toward the ejection hole 4 side, and the rearward movement of the trigger portion 81 causes the vertical supply. A storage cylinder 40 into which the liquid that has passed through the cylindrical portion 10 is supplied; and a storage plunger 50 that moves toward one side of the axial direction and is urged toward the other side along with the supply, and the trigger mechanism 80 opens forward and has a vertical supply cylinder at the rear. A main cylinder 82 communicating with the inside of the unit 10, a sliding portion 85 disposed inside the main cylinder 82 so as to be movable in the front-rear direction, and a sliding portion 85 projecting forward toward the outside of the main cylinder 82. , a main piston 83 having a projection 86 whose front end 86a is connected to the trigger portion 81, and a coil spring 84 into which the projection 86 of the main piston 83 is inserted to urge the trigger portion 81 forward. , provided. According to this configuration, contact between the coil spring 84 that biases the trigger portion 81 and the liquid can be suppressed, and the liquid can be continuously ejected.

Further, in this embodiment, a spring receiver 130 is provided in the front opening of the main cylinder 82 to receive the rear end of the coil spring 84 . According to this configuration, the spring receiver 130 can be attached to the front opening of the main cylinder 82 and the coil spring 84 can be arranged between the spring receiver 130 and the trigger portion 81 . Also, the spring receiver 130 can restrict the main piston 83 from coming off from the front opening of the main cylinder 82 .

Further, in this embodiment, the spring receiver 130 includes a pair of side wall portions 135 that sandwich the coil spring 84 in the left-right direction. According to this configuration, the coil spring 84 arranged outside the space surrounded by the main cylinder 82 and the main piston 83 is sandwiched between the pair of left and right side wall portions 135, making it difficult to see from the outside and improving the design. 4, see Figure 5). In addition, the pair of left and right side wall portions 135 can prevent the liquid and the like that are sprayed from adhering to the coil spring 84 . Furthermore, the pair of left and right side wall portions 135 can suppress diagonal pulling of the trigger portion 81 (pulling that twists the pivot portion of the trigger portion 81).

Further, in the present embodiment, the spring receiver 130 includes an inner cylindrical portion 131 inserted into the interior of the main cylinder 82, a receiving portion 134 formed inside the inner cylindrical portion 131 and receiving the rear end of the coil spring 84, A groove portion 133 is formed outside the inner tubular portion 131 and forms a gap extending in the front-rear direction between the outer peripheral surface of the inner tubular portion 131 and the inner peripheral surface of the main cylinder 82 . According to this configuration, the inner cylindrical portion 131 of the spring receiver 130 is inserted into the main cylinder 82 , so that the spring receiver 130 can be easily attached to the main cylinder 82 . In addition, the inner cylindrical portion 131 inserted inside the main cylinder 82 can restrict the forward removal of the main piston 83 sliding inside the main cylinder 82 . Further, a gap extending in the front-rear direction is formed between the outer peripheral surface of the inner tubular portion 131 and the inner peripheral surface of the main cylinder 82 by the groove portion 133 formed in the inner tubular portion 131 of the spring receiver 130. Even if the liquid leaks from the gap between the inner peripheral surface of the main cylinder 82 and the sliding contact portion of the main piston 83 that is in sliding contact with the inner peripheral surface, the liquid passes through the outer gap of the inner cylindrical portion 131. It is possible to suppress the liquid from flowing into the receiving portion 134 that receives the rear end of the coil spring 84 inside the inner cylindrical portion 131 and from contacting the coil spring 84 with the liquid.

Although embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. Embodiments and modifications thereof include, for example, those that can be easily imagined by those skilled in the art, those that are substantially the same, and those within an equivalent range.

For example, in the above embodiment, the case where the spring receiver 130 is attached to the front opening of the main cylinder 82 has been described as an example, but the spring receiver 130 for receiving the rear end of the coil spring 84 may not be attached. . In this case, for example, the rear end of the coil spring 84 may be received on the front side of the lip connecting portion 85b of the main piston 83 .

Further, for example, in the above embodiment, the case where the pair of left and right side wall portions 135 suppresses the diagonal pull of the trigger portion 81 has been described as an example. Instead, it may have only a cover function to cover the coil spring 84 .

Further, for example, only one locking portion 132 of the spring receiver 130 may be formed, or a plurality of locking portions 132 may be formed at intervals in the circumferential direction. Further, when only one locking portion 132 is formed, the locking portion 132 may be formed in a cylindrical shape surrounding the cylinder cylindrical portion 110 from the radially outer side. Alternatively, the engaging portion 132 may be engaged with the outer peripheral surface of the cylindrical portion 110 by screwing or the like.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1... Trigger type liquid ejector, 2... Ejector main body, 3... Nozzle member, 4... Ejection hole, 5... Cover body, 10... Vertical supply cylinder part, 11... Pipe, 20... Connection cylinder part, 21... Opening part , 30... Mounting cap 40... Storage cylinder 40a... Storage space 41... Supply hole 50... Storage plunger 60... Plunger urging member 70... Injection cylinder part 80... Trigger mechanism 81... Trigger part 81a Side wall 81A Opening 81b Front wall 81c Reinforcing rib 81d Connecting shaft 82 Main cylinder 82a Guide tube 83 Main piston 84 Coil spring (biasing member) 85 Sliding part 85a...Inner lip part 85b...Lip connecting part 85c...Outer lip part 86...Protrusion 86a...Front end part 86b...Recessed part 90...Ball valve 91...Reservoir valve 100...Closed Stopper 110 Cylinder tube 111 Fitting tube 120 Mounting tube 121 Nozzle shaft 122 Nozzle cap 130 Spring receiver 131 Inner tube 131a Rear end portion 132 Locking portion 132a Extension portion 132b Insertion portion 133 Groove portion 134 Receiving portion 135 Side wall portion A Container body O1 Axis line O2 Axis line O3 …axis, T…stopper

Claims (4)

an ejector body attached to a container body containing a liquid;
a nozzle member attached to the ejector body and formed with an ejection hole for ejecting liquid;
The ejector body is
a vertical supply cylinder part for sucking up the liquid in the container body;
a trigger mechanism having a trigger portion arranged so as to be movable rearward in a forward biased state, and causing the liquid to circulate from the vertical supply cylinder portion toward the ejection hole side by moving the trigger portion rearward; ,
a storage cylinder into which the liquid that has passed through the vertical supply cylinder portion is supplied by rearward movement of the trigger portion;
is disposed within the storage cylinder so as to be movable in the axial direction along the central axis of the storage cylinder, and moves in one direction in the axial direction as the liquid is supplied into the storage cylinder; a reservoir plunger biased toward the other side;
The trigger mechanism is
a main cylinder that opens forward and whose rear part communicates with the interior of the vertical supply cylinder;
a sliding portion disposed inside the main cylinder so as to be movable in the front-rear direction; and a projection projecting forward from the sliding portion toward the outside of the main cylinder and having a front end connected to the trigger portion. a main piston having
a trigger-type liquid ejector comprising: a biasing member into which the protrusion of the main piston is inserted to bias the trigger forward. 2. The trigger-type liquid ejector according to claim 1, further comprising a spring catch mounted in a front opening of said main cylinder and receiving a rear end of said biasing member. 3. The trigger-type liquid ejector according to claim 2, wherein the spring receiver includes a pair of side walls sandwiching the biasing member in the lateral direction. The spring receiver is
an inner cylindrical portion inserted inside the main cylinder;
4. The trigger-type liquid ejector according to claim 2, further comprising a receiving portion formed inside said inner cylindrical portion for receiving a rear end of said biasing member.

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