JP2023176378A - Trigger type liquid ejector - Google Patents

Abstract

To make it possible to achieve down-sizing of a trigger type liquid ejector and to eject a pressurized liquid while achieving down-sizing of a nozzle part and simplification of configuration.SOLUTION: A trigger type liquid ejector 1 comprises a pressure accumulation member 40 switching to an allowable position allowing communication in such a manner that an ejector body 2 moves rearward from a blockage position P1 blocking communication between the inside of a vertical supply cylinder part 10 and an exhaust hole 4 through the inside of an injection cylinder part 20 due to pressure rise in the injection cylinder part. A seal portion 45, which extends along an axis O2 direction of the injection cylinder part and extends over the entire length in a circumferential direction, is formed between the injection cylinder part and the pressure accumulation member. The seal portion surface-contacts the injection cylinder part and the pressure accumulation member at the blockage position.SELECTED DRAWING: Figure 1

Description

The present invention relates to a triggered liquid ejector.

2. Description of the Related Art Trigger-type liquid ejectors are known that suck up liquid from inside a container and eject the liquid through an ejection hole by operating a trigger part.
As shown in Patent Document 1 below, this type of trigger-type liquid ejector includes a ejector body that is attached to a container housing a liquid, and an ejection hole that ejects the liquid forward. Trigger-type liquid ejectors are known that include a nozzle section with a

The ejector body includes a vertical supply tube that sucks up the liquid inside the container, an injection tube that extends forward from the vertical supply tube, and a trigger that is movable rearward in a forward biased state. The trigger mechanism has a trigger mechanism. The trigger mechanism causes the liquid to be introduced into the injection cylinder from the vertical supply cylinder and to be ejected from the injection cylinder toward the ejection hole by moving the trigger part backward.
The nozzle part is combined with the front end part of the injection cylinder part via a relay member. Furthermore, a pressure accumulation valve is provided within the nozzle portion to open and close the ejection hole. The pressure accumulation valve opens the ejection hole when the pressure inside the pressure accumulation chamber exceeds a predetermined pressure, and causes the contents to be ejected from the ejection hole.

Japanese Patent Application Publication No. 2011-177630

However, in the trigger type liquid ejector described in Patent Document 1, since the pressure accumulation valve is provided in the nozzle section, the structure of the nozzle section becomes complicated and the nozzle section becomes large. As a result, the size of the trigger-type liquid ejector as a whole has increased.

The present invention has been made in view of the above circumstances, and its purpose is to downsize the nozzle part and simplify the configuration, while also downsizing the trigger type liquid ejector as a whole. Another object of the present invention is to provide a trigger type liquid ejector capable of ejecting pressurized liquid.

(1) The trigger-type liquid ejector according to the present invention includes a ejector main body that is attached to a container body containing liquid, and a nozzle section that is attached to the ejector main body and has an ejection hole that ejects the liquid. The ejector body includes a vertical supply tube that sucks up the liquid from the container body, and an injection tube that extends from the vertical supply tube and opens to the outside of the ejector body. It has a trigger part disposed so as to be movable rearward in a forward biased state, and by moving the trigger part rearward, the liquid is directed from the inside of the vertical supply cylinder part through the inside of the injection cylinder part to the side of the ejection hole. a trigger mechanism for causing the flow to flow; and a trigger mechanism that is movably disposed within the injection cylinder and communicates between the inside of the vertical supply cylinder and the ejection hole through the injection cylinder due to an increase in pressure within the injection cylinder. a pressure accumulating member that is switched to an allowable position that allows the communication by moving rearward from a blocking position where the communication is blocked; A seal portion is formed that extends along the entire length in the circumferential direction around the axis, and the seal portion is in surface contact with the injection cylinder portion and the pressure accumulating member at the blocking position. It is characterized by

According to the trigger type liquid ejector according to the present invention, by operating the trigger part against the forward biasing force and moving the trigger part backward, the liquid is directed from the inside of the vertical supply cylinder part through the inside of the injection cylinder part toward the jet hole side. It can be distributed. At this time, since the pressure accumulating member is disposed within the injection cylinder, the liquid supplied into the injection cylinder increases the pressure within the injection cylinder. Then, when the pressure inside the injection cylinder increases, the pressure accumulating member moves rearward due to this pressure increase. Thereby, the pressure accumulating member can be moved rearward from the blocking position, and can be switched to the allowable position that allows communication between the inside of the vertical supply cylinder and the ejection hole through the inside of the injection cylinder. Therefore, the liquid with increased pressure can be guided to the ejection hole of the nozzle portion, and can be ejected from the ejection hole toward the outside. Furthermore, by providing the pressure accumulating member, the pressure of the liquid ejected from the ejection hole can be stabilized, so that the liquid can be ejected in a desired manner.

Furthermore, since the pressure accumulating member is provided in the injection cylinder, the nozzle part can be made smaller and the structure can be simplified, compared to the conventional case where the pressure accumulating member is provided in the nozzle part. For example, it is possible to easily suppress bulkiness of the nozzle portion in the front-rear direction and vertical direction. Therefore, the entire trigger-type liquid ejector can be downsized.
Furthermore, since the pressure accumulating member is provided within the injection cylinder, the internal volume of the injection cylinder can be reduced without increasing the number of parts. Thereby, when the trigger section is operated, the pressure inside the injection cylinder section can be quickly increased, and the number of times of priming can be suppressed. Furthermore, by reducing the internal volume of the injection cylinder, it becomes difficult for air to remain in the injection cylinder, so it is possible to suppress variations in the amount of ejection caused by residual air, liquid dripping from the ejection holes, etc.

Particularly, since a seal part is formed between the injection cylinder part and the pressure accumulation member, which extends along the axial direction of the injection cylinder part and also extends over the entire length in the circumferential direction, the pressure accumulation member is in the cutoff position. At times, the seal portion can be brought into surface contact with the injection cylinder portion and the pressure accumulating member. Specifically, the seal portion can be brought into surface contact with the injection cylinder portion and the pressure accumulating member with an interference margin. Therefore, it is possible to secure a contact area between the injection cylinder part and the pressure accumulating member via the seal part, and it is also possible to secure a large resistance force (frictional force) between the injection cylinder part and the pressure accumulating member. . In particular, a large resistance force caused by the interference can be ensured between the injection cylinder part and the pressure accumulating member. Therefore, when the pressure within the injection cylinder increases, it is possible to prevent the pressure accumulating member from moving toward the permissible position before reaching a desired pressure value. Therefore, pressure accumulation can be performed more reliably. Then, when the pressure inside the injection cylinder exceeds the above pressure value, the pressure accumulating member can be moved vigorously toward the permissible position, and the liquid whose pressure has increased due to the pressure accumulation can be vigorously ejected. Furthermore, since the amount of accumulated pressure can be adjusted simply by adjusting the contact area of the seal portion, the adjustment can be easily performed.

(2) The seal portion is formed in an annular shape that protrudes radially outward from the outer circumferential surface of the pressure accumulating member and extends over the entire circumference of the pressure accumulating member, and in the blocking position, the seal portion It may also be pressed against the inner circumferential surface from the inside in the radial direction.

In this case, since the seal part is formed in an annular shape so as to protrude radially outward from the outer circumferential surface of the pressure accumulating member, when the pressure accumulating member is located at the cutoff position, the injection cylinder part The seal portion can be radially tightened (sandwiched) between the pressure accumulating member and the pressure accumulating member. Thereby, the sealing performance of the seal portion can be improved, and the resistance force (frictional force) between the injection cylinder portion and the pressure accumulating member can be more easily ensured.

(3) The pressure accumulating member may be biased forward with a biasing force of 2.5N to 9.5N.

In this case, when the pressure accumulating member is located at the cutoff position, the pressure accumulating member can be biased forward in advance. Therefore, the pressure accumulating member can be positioned at the blocking position, and the pressure of the liquid in the injection cylinder can be more effectively accumulated.

(4) An elastic arm section that biases the trigger section forward; and an elastic body that contacts the pressure accumulating member from behind; By deforming, the pressure accumulating member is allowed to move rearward, and as the pressure within the injection cylinder decreases, the pressure accumulating member is urged forward by elastic restoring deformation, and the elastic body and the The elastic arm portion may be integrally formed.

In this case, by operating the trigger part and moving it backwards against the bias from the elastic arm part, the liquid can be made to flow from the inside of the vertical supply cylinder part through the injection cylinder part towards the jet hole side. , the pressure inside the injection cylinder can be gradually increased. Then, when the pressure inside the injection cylinder increases, the pressure accumulating member moves rearward against the bias of the elastic body due to this pressure increase. Thereby, the pressure accumulating member can be moved rearward from the blocking position and switched to the allowable position, so that the liquid with increased pressure can be jetted outward from the jetting hole.

Further, after the liquid is ejected, as the pressure inside the injection cylinder decreases, the elastic body undergoes elastic restoring deformation, thereby biasing the pressure accumulating member forward. Therefore, the pressure accumulating member can be restored forward and returned to the cutoff position quickly. Thereby, communication between the inside of the vertical supply cylinder part and the ejection hole through the inside of the injection cylinder part can be cut off using the seal part. Moreover, the trigger part can be urged forward by the elastic restoring force of the elastic arm part, and the trigger part can be moved back to its original position.
Therefore, it is possible to quickly return to a state that allows the next ejection, and it is easy to use.

Furthermore, since the elastic body and the elastic arm portion are integrally formed, there is no need to separately provide a biasing member or the like that biases the trigger portion forward. Therefore, the number of parts can be reduced, and costs can also be reduced.

According to the trigger type liquid ejector according to the present invention, it is possible to reduce the size of the trigger type liquid ejector as a whole while reducing the size of the nozzle part and simplifying the configuration. be able to. In particular, since the pressure accumulating member is difficult to move toward the permissible position before reaching a desired pressure value, pressure can be accumulated reliably, and the liquid with increased pressure can be appropriately ejected.

1 is a longitudinal sectional view showing an embodiment of a trigger type liquid ejector according to the present invention. FIG. 2 is a perspective view of the trigger-type liquid ejector shown in FIG. 1; FIG. 2 is an enlarged vertical cross-sectional view of the vicinity of the pressure accumulating member shown in FIG. 1. FIG. FIG. 2 is a perspective view of the closure member shown in FIG. 1; FIG. 4 is a longitudinal cross-sectional view showing a state in which the pressure accumulating member has moved backward from the state shown in FIG. 3 . FIG. 7 is a diagram showing a modification of the trigger-type liquid ejector, and is an enlarged vertical cross-sectional view of the vicinity of the pressure accumulating member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a trigger type liquid ejector according to the present invention will be described with reference to the drawings. This embodiment will be described using an example of an ejection container in which a trigger type liquid ejector is attached to a container body.

As shown in FIGS. 1 and 2, the trigger type liquid ejector 1 of the present embodiment includes an ejector main body 2 that is attached to a container body A that stores liquid, and an ejector hole 4 that ejects liquid. It includes a nozzle part 3 attached to the ejector main body 2, and a cover body 5 that covers the ejector main body 2 and the nozzle part 3.
Note that in FIG. 2, illustration of the cover body 5 is omitted. Furthermore, each component of the trigger type liquid ejector 1 is a molded product made of synthetic resin unless otherwise specified.

(Blower body)
The ejector main body 2 mainly includes a vertical supply cylinder part 10, an injection cylinder part 20, a mounting cap 30, a pressure accumulation member 40, a closing member 50, a trigger mechanism 60, and a ball valve 70.

In this embodiment, the central axis of the vertical supply cylinder 10 is the axis O1, the container body A side along this 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 up-down direction. Furthermore, in a plan view seen from the up-down direction, one direction intersecting the axis O1 is referred to as a front-back direction L1, and a direction orthogonal to both the up-down direction and the front-back direction L1 is referred to as a left-right direction L2.

Further, in this embodiment, the central axis of the injection cylinder portion 20 is the axis O2. In this embodiment, the axis O2 extends in the front-rear direction L1. Therefore, in this embodiment, the front-rear direction L1 corresponds to the axial direction along the central axis of the injection cylinder section 20. However, the axial direction along the axis O2 does not have to coincide with the front-rear direction L1.

(Vertical supply cylinder part)
As shown in FIG. 1, the vertical supply tube 10 extends in the vertical direction and has the function of sucking up the liquid in the container body A. The vertical supply cylinder section 10 is attached to the container body A by a mounting cap 30. The vertical supply cylinder section 10 includes an outer cylinder 11 having a crested cylinder shape, and an inner cylinder 12 fitted into the outer cylinder 11.
Note that the axis O1 of the vertical supply cylinder section 10 is located at the rear of the container axis of the container body A.

The outer cylinder 11 includes a large diameter part 11a, a small diameter part 11b that is arranged above the large diameter part 11a and has a smaller diameter than the large diameter part 11a, and an upper end of the large diameter part 11a and a lower end of the small diameter part 11b. an annular connecting portion 11c that connects the connecting tube portion 11c, a connecting tube portion 11d disposed above the small diameter portion 11b and having a smaller diameter than the small diameter portion 11b, and an upper end portion of the small diameter portion 11b and a lower end portion of the connecting tube portion 11d. and a ceiling wall portion 11e that connects the.

The small diameter portion 11b is disposed coaxially with the axis O1, and the connecting cylinder portion 11d is disposed eccentrically forward with respect to the axis O1. The ceiling wall portion 11e covers the upper part of the ball valve 70.

The inner cylinder 12 has a large diameter part 12a, a small diameter part 12b that is arranged inside the large diameter part 12a and has a smaller diameter than the large diameter part 12a, and an annular connection that connects the large diameter part 12a and the small diameter part 12b. A portion 12c is provided.
The large diameter portion 12a is assembled inside the large diameter portion 11a of the outer cylinder 11. In the illustrated example, the large diameter portion 12a is combined with the inside of the large diameter portion 11a of the outer cylinder 11 by undercut fitting. A portion of the large diameter portion 12a that protrudes downward from the large diameter portion 11a of the outer cylinder 11 is formed with an annular collar portion 12d that protrudes radially outward. The flange 12d is disposed on the upper opening edge of the mouth of the container body A via the packing, and is connected to the upper opening edge of the mouth by a mounting cap 30 that is attached to the mouth of the container body A by screwing, for example. It is sandwiched vertically between the two. Thereby, the entire ejector body 2 is attached to the mouth of the container body A via the attachment cap 30.

The small diameter portion 12b is formed in a cylindrical shape and is disposed coaxially with the axis O1. The small diameter portion 12b is open both in the vertical direction and is disposed within the small diameter portion 11b of the outer cylinder 11. The upper opening edge of the small diameter portion 12b is slightly further away from the top wall portion 11e of the outer cylinder 11 below. An upper end portion of a pipe 13 extending in the vertical direction is fitted inside the lower portion of the small diameter portion 12b. Note that the lower end opening of the pipe 13 is located at the bottom of the container body A (not shown).

(Injection cylinder part)
An injection cylinder part 20 is arranged above the vertical supply cylinder part 10.
The injection cylinder part 20 is connected to the upper end of the connection cylinder part 11d in the vertical supply cylinder part 10, and is formed to extend forward about the axis O2. The injection cylinder portion 20 is formed into a cylindrical shape with open front and rear sides. An opening on the front side of the injection cylinder portion 20 is an injection opening 21 that supplies liquid toward the front.

As shown in FIGS. 1 and 3, the inner diameter of the injection cylinder portion 20 differs midway in the front-rear direction L1. Thereby, the inner diameter of the injection cylinder portion 20 is formed so as to change in two steps in the front-rear direction L1. Specifically, the inner diameter of a portion of the injection cylinder portion 20 that is located more forward than the approximately intermediate portion in the front-rear direction L1 (hereinafter sometimes referred to as a first inner diameter) is located more rearward than the intermediate portion. It is formed smaller than the inner diameter of the portion where it is located (hereinafter sometimes referred to as the second inner diameter).
As a result, as shown in FIG. 3, a stepped wall 20a is formed on the inner circumferential surface of the intermediate portion of the injection cylinder portion 20, connecting the first inner diameter and the second inner diameter and facing rearward.

Note that the position of the stepped wall 20a is not limited to the case where it is formed at the intermediate part in the front-rear direction L1 of the injection cylinder part 20, but may be formed at a position closer to the front or rear of the intermediate part. do not have.

As shown in FIGS. 1 to 3, a rear cylinder part 22 is formed at the rear end of the injection cylinder part 20 and is arranged coaxially with the axis O2. Note that the rear cylinder part 22 is a part of the injection cylinder part 20.
The rear cylinder part 22 is formed into a cylindrical shape whose inner diameter and outer diameter are larger than the inner diameter (second inner diameter) and outer diameter of the injection cylinder part 20, and is open rearward. The rear cylinder part 22 is formed integrally with the upper end of the connection cylinder part 11d in the vertical supply cylinder part 10, and is also formed to extend rearward from the connection cylinder part 11d.
A through hole 23 is formed in the lower part of the rear cylinder part 22 and passes through the rear cylinder part 22 in the vertical direction. Thereby, the inside of the rear cylinder part 22 and the inside of the connecting cylinder part 11d are communicated through the through hole 23. Therefore, the inside of the injection cylinder part 20 communicates with the inside of the connection cylinder part 11d through the through hole 23.

Note that a fitting space 24 is formed between the lower part of the rear cylinder part 22 and the top wall part 11e of the outer cylinder 11 in the vertical supply cylinder part 10, and is open to both the rear and left and right directions L2. .

Furthermore, a middle cylinder part 25 extending rearward is formed at the rear end of the injection cylinder part 20. The middle cylinder part 25 is arranged coaxially with the axis O2 and inside the rear cylinder part 22. The middle cylinder part 25 is formed into a cylindrical shape with an inner diameter equal to the inner diameter (second inner diameter) of the injection cylinder part 20 and an outer diameter smaller than the inner diameter of the rear cylinder part 22 . Thereby, an annular space centered on the axis O2 is formed between the middle cylinder part 25 and the rear cylinder part 22.
In addition, the lower part of the middle cylinder part 25 is arranged so that the above-mentioned through hole 23 may be covered from above.

A closing member 50 that closes the rear cylinder part 22 from the rear is attached to the injection cylinder part 20 configured as described above. As a result, the entire injection cylinder portion 20 is internally closed by the closing member 50.
Note that the closing member 50 will be explained in detail later.

(Pressure accumulating member)
As shown in FIGS. 1 and 3, a pressure accumulating member 40 is disposed within the injection cylinder section 20 described above.
The pressure accumulating member 40 is disposed within the injection cylinder portion 20 so as to be movable in the front-rear direction L1. The pressure accumulating member 40 is moved to a blocking position P1 (FIGS. 1 and 3 (see FIG. 5), and can be switched to a permissible position P2 (see FIG. 5) that allows the above-mentioned communication.

The pressure accumulating member 40 is formed into a shaft shape extending along the front-rear direction L1, and includes a pressure accumulating shaft 41 disposed coaxially with the axis O2.
The pressure accumulation shaft 41 is inserted into the injection cylinder part 20 from the rear and is arranged over the entire length of the injection cylinder part 20. At this time, the pressure accumulation shaft 41 extends along the front-rear direction L1 so that the front end portion is disposed inside the injection opening 21 and the rear end portion is located rearward than the middle cylinder portion 25.

The pressure accumulation shaft 41 includes a front pressure accumulation shaft 42 , an intermediate pressure accumulation shaft 43 which is arranged at the rear of the front pressure accumulation shaft 42 and has a larger outer diameter than the front pressure accumulation shaft 42 , and a front pressure accumulation shaft 43 arranged at the rear of the intermediate pressure accumulation shaft 43 . The rear pressure accumulation shaft 44 is arranged and has a larger outer diameter than the intermediate pressure accumulation shaft 43. Thereby, the pressure accumulation shaft 41 is formed into a shaft shape whose outer diameter changes in three steps along the front-rear direction L1.

When the pressure accumulation member 40 is located at the cutoff position P1, the front pressure accumulation shaft 42 and the intermediate pressure accumulation shaft 43 are arranged in front of the step wall 20a formed on the inner peripheral surface of the injection cylinder portion 20. Furthermore, the front pressure accumulation shaft 42 and the intermediate pressure accumulation shaft 43 are formed to have smaller outer diameters than the first inner diameter of the injection cylinder portion 20 . Therefore, an annular first gap S1 extending in the front-rear direction L1 is formed between the outer circumferential surfaces of the front pressure accumulation shaft 42 and the intermediate pressure accumulation shaft 43 and the inner circumferential surface of the injection cylinder section 20.

In the illustrated example, the pressure accumulation shaft 41 includes a front pressure accumulation shaft 42 and an intermediate pressure accumulation shaft 43 having different outer diameters, but the invention is not limited to this case. For example, the outer diameter of the front pressure accumulation shaft 42 may be formed to be the same as the outer diameter of the intermediate pressure accumulating shaft 43. In this case, the pressure accumulation shaft 41 is formed in the shape of a shaft whose outer diameter changes in two steps along the front-rear direction L1.

When the pressure accumulating member 40 is located at the cutoff position P1, the rear pressure accumulating shaft 44 is arranged behind the step wall 20a formed on the inner circumferential surface of the injection cylinder part 20. Furthermore, the rear pressure accumulation shaft 44 is formed to have an outer diameter smaller than the second inner diameter of the injection cylinder portion 20 . Therefore, an annular second gap S2 extending in the front-rear direction L1 is formed between the outer circumferential surface of the rear pressure accumulation shaft 44 and the inner circumferential surface of the injection cylinder section 20.
Further, the rear pressure accumulating shaft 44 is formed in a cylindrical shape that opens rearward, and is also formed to extend rearward than the middle cylinder portion 25 .

A seal portion 45 is formed between the pressure accumulating shaft 41 and the injection cylinder portion 20 configured as described above, which extends along the axis O2 and extends all the way around the axis O2 in the circumferential direction. There is.
As shown in FIG. 3, the seal portion 45 protrudes from the outer peripheral surface of the rear portion of the intermediate pressure accumulation shaft 43 toward the outside in the radial direction of the intermediate pressure accumulation shaft 43, and extends over the entire circumference of the intermediate pressure accumulation shaft 43. It is formed in a ring shape. Thereby, when the pressure accumulating member 40 is located at the cutoff position P1, the seal portion 45 is radially attached to a portion of the inner circumferential surface of the injection cylinder portion 20 that is located on the front side of the step wall 20a. are in close contact with each other from the inside.
Therefore, when the pressure accumulating member 40 is located at the cutoff position P1, the seal portion 45 blocks communication between the first gap S1 and the second gap S2, and the vertical supply through the inside of the injection cylinder portion 20. Communication between the interior of the cylindrical portion 10 and the ejection hole 4 is blocked.

Note that when the pressure accumulating member 40 moves backward from the blocking position P1 and is located at the allowable position P2 (see FIG. 5), the seal portion 45 moves to the rear side of the step wall 20a. Thereby, the seal by the seal part 45 can be released, and by allowing communication between the first gap S1 and the second gap S2, the inside of the vertical supply cylinder part 10 through the inside of the injection cylinder part 20 and the injection hole 4 are allowed to communicate with each other. It is possible to allow communication with

Furthermore, an interference margin is formed in the seal portion 45 of this embodiment. Specifically, the seal portion 45 is formed with a maximum interference margin of 0.03 mm on one side in the radial direction. This interference is inclined within a range of 0.5 mm in the front-rear direction so that the amount of protrusion decreases toward the front. That is, the seal portion 45 is formed to have a tapered cross section so that the diameter increases from the front toward the rear (see FIG. 5). Note that the tightening margin is not limited to the above-mentioned value.
As a result, as shown in FIG. 3, when the pressure accumulating member 40 is located at the cutoff position P1, the seal portion 45 is applied from the inside in the radial direction to the portion located on the front side of the step wall 20a. They are in close contact using the interference margin. Thereby, a large resistance force due to the interference of the seal portion 45 can be secured between the injection cylinder portion 20 and the pressure accumulating member 40.

Further, as shown in FIG. 3, between the outer circumferential surface at the rear end of the seal portion 45 and the outer circumferential surface at the front end of the rear pressure accumulation shaft 44, there is a tapered surface 46 with a tapered cross-section whose diameter increases toward the rear. It is connected by. The tapered surface 46 is in close contact with the opening edge of the stepped wall 20a from the rear when the pressure accumulating member 40 is located at the cutoff position P1.

An annular flange portion 47 extending radially outward is formed at a rear end portion of the rear pressure accumulating shaft 44 located rearward of the middle cylinder portion 25 .
The flange portion 47 is formed with a sliding cylinder portion 48 that projects forward from the front surface of the flange portion 47 . The sliding cylinder part 48 is arranged between the rear cylinder part 22 and the middle cylinder part 25, and gradually extends toward the outside of the injection cylinder part 20 in the radial direction as it goes forward. The sliding cylinder part 48 is formed to be elastically deformable, and the front end of the sliding cylinder part 48 is in close contact with the inner circumferential surface of the rear cylinder part 22 due to elastic restoring force.
As a result, when the pressure accumulating member 40 moves in the front-rear direction L1, the sliding cylinder part 48 moves over the inner circumferential surface of the rear cylinder part 22 while maintaining a certain degree of sealing performance with the rear cylinder part 22. It is possible to slide.

Further, a guide surface 49 having a tapered cross section whose diameter gradually increases from the front to the rear is formed at the opening edge at the rear end of the rear pressure accumulation shaft 44 .

In the pressure accumulating member 40 and the injection cylinder part 20 configured as described above, the space surrounded by the flange part 47, the sliding cylinder part 48, and the rear cylinder part 22 functions as a pressure accumulating chamber S3. Note that the pressure accumulation chamber S3 includes a second gap S2. The pressure accumulation chamber S3 communicates with the inside of the connecting cylinder part 11d of the vertical supply cylinder part 10 through the through hole 23.

As shown in FIGS. 1 and 2, in a portion located below the injection barrel 20 and above the mounting cap 30, a cylinder barrel 15 that protrudes forward is attached to the outer barrel 11. is formed integrally with. The cylinder cylindrical portion 15 is open toward the front.

(Relay member)
Further, a relay member 80 is attached to the injection cylinder part 20 to connect the injection cylinder part 20 and the nozzle part 3.
As shown in FIGS. 1 and 2, the relay member 80 is attached to the injection cylinder section 20 from the front. The relay member 80 is located on the front side of the injection opening 21 of the injection cylinder section 20, and extends rearward from the opposing wall 81 that is arranged to face the injection opening 21. A first relay cylinder part 82 is fitted onto the injection cylinder part 20, and a second relay cylinder part 83 extends forward from the opposing wall part 81. A guide shaft 84 extending forward from the wall portion 81 is provided.

The second relay cylinder part 83 and the guide shaft 84 are arranged around an axis O3 eccentrically downward with respect to the axis O2 of the injection cylinder part 20. A communication hole 85 communicating with the injection opening 21 of the injection cylinder part 20 is formed in a portion of the opposing wall part 81 located above the guide shaft 84 and inside the second relay cylinder part 83. ing. Thereby, the inside of the second relay cylinder part 83 communicates with the inside of the injection cylinder part 20 through the communication hole 85 and the injection opening 21 .
A first switching groove 86 extending in the front-rear direction L1 is formed on the outer peripheral surface of the guide shaft 84. A plurality of first switching grooves 86 are formed at intervals around the axis O3.

Furthermore, as shown in FIG. 2, a pair of lever support walls 87 extending rearward are formed in portions of the opposing wall portion 81 located on both sides of the second relay cylinder portion 83 in the left-right direction L2. There is. The lever support wall 87 is arranged with a gap between it and the second relay cylinder part 83.

(Trigger mechanism)
As shown in FIGS. 1 and 2, the trigger mechanism 60 includes a trigger portion 61, a main cylinder 62, and a main piston 63. The trigger mechanism 60 is capable of causing the liquid to flow from inside the vertical supply cylinder part 10 through the inside of the injection cylinder part 20 toward the ejection hole 4 side by swinging the trigger part 61 backward.

The main cylinder 62 is fitted within the cylinder cylindrical portion 15 . The main cylinder 62 is formed into a bottomed cylindrical shape that opens forward. The inside of the main cylinder 62 communicates with a portion of the outer cylinder 11 of the vertical supply cylinder section 10 located above the inner cylinder 12 .

The main piston 63 is disposed within the main cylinder 62 so as to be movable in the front-rear direction L1. The main piston 63 is movable in the front-rear direction L1 in conjunction with the rocking of the trigger portion 61. Thereby, the inside of the main cylinder 62 is pressurized and depressurized as the main piston 63 moves in the front-rear direction L1. In addition, the main piston 63 is formed in the shape of a capped cylinder that is open at the rear and closed at the front.

The main piston 63 is urged forward by the urging force of the elastic arm part 52 of the closing member 50, which will be described later, together with the trigger part 61. The main piston 63 moves rearward and is pushed into the main cylinder 62 as the trigger portion 61 swings rearward.
Note that the main piston 63 is located at the forwardmost position when the trigger portion 61 is at the forwardmost swinging position.

The trigger part 61 includes a trigger body 65, a support piece 66, and a receiving part 67, and is arranged in front of the main piston 63 so as to be movable back and forth.
The trigger body 65 extends in front of the main piston 63 so as to be inclined forward from above to below. The trigger body 65 is a part that is held and operated when performing a jetting operation, and for example, an index finger or the like is hooked onto it from the front.
A front end portion of the main piston 63 is connected to an intermediate portion of the trigger body 65 in the vertical direction. Thereby, the main piston 63 moves back and forth as the trigger portion 61 moves back and forth.

A pair of support pieces 66 are provided at the upper end of the trigger body 65 with an interval in the left-right direction L2. The pair of support pieces 66 are respectively combined with a pair of lever support walls 87 formed on the relay member 80 so as to be rotatable around an axis O4 along the left-right direction L2. Thereby, the trigger portion 61 can be rotated around the axis O4 using the pair of support pieces 66 as fulcrums.

A pair of receiving portions 67 are provided on both left and right sides of the trigger body 65. The receiving portion 67 protrudes from the trigger body 65 on both sides in the left-right direction L2, and is formed to open upward and rearward. An elastic arm portion 52 of a closing member 50, which will be described later, is fitted into the receiving portion 67. Thereby, the trigger part 61 is urged forward by the elastic restoring force of the elastic arm part 52.

(ball valve)
As shown in FIG. 1, the ball valve 70 is provided inside the inner cylinder 12 of the vertical supply cylinder section 10.
The ball valve 70 is disposed inside the upper end portion of the inner cylinder 12 and is seated so as to be separable from an annular tapered cylinder 71 that protrudes inward from the inner peripheral surface of the inner cylinder 12 . The ball valve 70 blocks communication between the inside of the container body A and the inside of the main cylinder 62 through the inside of the vertical supply cylinder 10 when the main cylinder 62 is pressurized, and also opens upward when the main cylinder 62 is depressurized. By moving and separating from the tapered cylinder 71, the check valve allows communication between the inside of the container body A and the inside of the main cylinder 62 through the inside of the vertical supply cylinder part 10. Note that the amount of upward movement of the ball valve 70 is regulated by the top wall portion 11e of the outer cylinder 11.

(Closing member)
As shown in FIGS. 1 and 2, in the ejector main body 2 configured as described above, a closing member 50 is combined with the rear cylinder part 22 of the injection cylinder part 20 from the rear. Thereby, the closing member 50 closes off the injection cylinder part 20 from the rear while trapping the pressure accumulating member 40 inside the injection cylinder part 20 .
The closing member 50 includes at least an elastic protrusion (elastic body) 51 that contacts the pressure accumulating member 40 from the rear, and a pair of elastic arm portions 52 that urges the trigger portion 61 forward.

The closing member 50 will be explained in detail.
As shown in FIGS. 1 to 4, the closing member 50 includes a closing wall 53 that contacts the rear opening end of the rear cylinder section 22 of the injection tube section 20 from the rear, and a closing wall 53 that extends forward from the closing wall 53. , and a fitting cylinder 54 fitted inside the rear cylinder part 22.

The elastic protrusions 51 are formed to extend forward from a portion of the closing wall 53 located inside the fitting cylinder 54, and are arranged in plurality so as to be spaced apart in the circumferential direction around the axis O2. There is. The pair of elastic arm portions 52 are formed to extend forward from portions of the closure wall 53 located on both sides of the fitting tube 54 in the left-right direction L2.

The closing wall 53 contacts the entire circumference of the rear open end of the rear cylinder portion 22 from behind. A locking hole is formed on the outer peripheral surface of the fitting cylinder 54 by protruding toward the outside in the radial direction of the injection cylinder part 20 and fitting into the locking hole 22a formed in the rear cylinder part 22. A first locking protrusion 55 is formed that locks onto 22a from the front.
The first locking protrusion 55 is formed at least on the upper portion of the fitting tube 54 . In the illustrated example, the first locking protrusion 55 is formed on the outer peripheral surface of the fitting tube 54 so as to extend in the circumferential direction. Thereby, the fitting cylinder 54 is fitted inside the rear cylinder part 22 while being prevented from coming off backward by the first locking protrusion 55.

The elastic protrusion 51 is in contact with a guide surface 49 formed on the rear pressure accumulation shaft 44 of the pressure accumulation member 40 and having a tapered cross section from the rear. The elastic protrusion 51 is elastically deformed due to an increase in the pressure within the injection cylinder portion 20, that is, the pressure within the pressure accumulation chamber S3, thereby allowing the pressure accumulation member 40 to move rearward and reducing the pressure within the pressure accumulation chamber S3. As the pressure decreases, the pressure accumulating member 40 is urged forward by elastic restoring deformation.

In particular, the elastic protrusion 51 contacts the guide surface 49 of the pressure accumulating member 40 from behind while being biased in advance with a biasing force within the range of 2.5N to 9.5N. Therefore, the elastic protrusion 51 biases the pressure accumulating member 40 forward in a state in which it is bent and deformed radially inward in advance. Thereby, the elastic protrusion 51 is able to position the pressure accumulating member 40 at the cutoff position P1.
Note that when the elastic protrusion 51 biases the pressure accumulating member 40 in advance with a biasing force of 2.5N to 9.5N, the elastic protrusion 51 has a force of 0.2 mm to 9.5 mm compared to the case where it is not biased in advance. It is deformed by a deflection amount of about 0.5 mm.

Note that the elastic protrusion 51 is not limited to the case where the pressure accumulating member 40 is biased in advance, and may simply be in contact with it from the rear, for example. However, it is preferable to bias the pressure accumulating member 40 in advance because it is easy to position the pressure accumulating member 40 at the cutoff position P1 and the pressure of the liquid can be accumulated effectively.
Further, it is more preferable that the elastic protrusion 51 be biased in advance with a biasing force in the range of 4.5N to 7.0N. In this case, the amount of deflection of the elastic protrusion 51 is approximately 0.3 mm to 0.4 mm.

Specifically, in this embodiment, the elastic protrusion 51 biases the pressure accumulating member 40 forward with a biasing force of 6.5N. The amount of deflection of the elastic protrusion 51 in this case is 0.35 mm.
As mentioned above, materials that can realize the elastic protrusions 51 for biasing the pressure accumulating member 40 forward in advance include polyacetal resin (POM) manufactured by Polyplastics Co., Ltd.; M270-57''.

The elastic protrusion 51 configured as described above positions the pressure accumulating member 40 at the cutoff position P1 until the pressure within the pressure accumulating chamber S3 reaches a predetermined value, and when the pressure within the pressure accumulating chamber S3 exceeds the predetermined value ( (i.e., when the pressure exceeds a predetermined value), the pressure accumulating member 40 is elastically deformed to permit rearward movement of the pressure accumulating member 40 toward the permissible position P2.

Specifically, when the pressure within the pressure accumulation chamber S3 exceeds a predetermined value, the elastic protrusion 51 further bends inward in the radial direction of the injection cylinder portion 20 while following the guide surface 49 of the pressure accumulation member 40. It deforms elastically so that it Thereby, the pressure accumulating member 40 is allowed to move rearward due to the elastic deformation of the elastic protrusion 51.
Thereafter, the elastic protrusion 51 is elastically deformed toward the outside in the radial direction as the pressure in the pressure storage chamber S3 decreases. Thereby, the pressure accumulating member 40 can be biased forward by the elastic protrusion 51, and the pressure accumulating member 40 can be restored and moved forward.

As shown in FIG. 2, the pair of elastic arm sections 52 are arranged on both sides of the injection cylinder section 20 in the left-right direction L2. The pair of elastic arm portions 52 are elastically deformed upward into a convex arc shape when viewed from the side in the left-right direction L2, and the front end portions (lower end portions) are connected to the receiving portion 67 of the trigger portion 61. is housed within. As a result, the elastic arm portion 52 is accommodated in the receiving portion 67 in a state where the elastic arm portion 52 is flexibly deformed with the rear end side as a starting point, and the front end portion is elastically displaced in the front-rear direction L1 as the trigger portion 61 is operated. Thereby, the elastic arm section 52 biases the trigger section 61 forward.

As shown in FIGS. 2 and 4, a connecting wall 56 is formed in the lower portion of the closing wall 53, extending forward and connecting the pair of elastic arm portions 52 in the left-right direction L2. Thereby, the rear end portions of the pair of elastic arm portions 52 are integrally connected via the connecting wall 56, and a predetermined rigidity is ensured.
As shown in FIG. 1, the connecting wall 56 enters from the rear into the fitting space 24 formed between the lower part of the rear cylinder part 22 and the top wall part 11e of the outer cylinder 11. It is fitted into the fitting space 24. Therefore, the entire closure member 50 is combined with the injection cylinder portion 20 in a state in which rattling in the vertical direction is suppressed.

Furthermore, as shown in FIGS. 2 and 4, second locking protrusions 57 are formed downwardly on the rear end sides of the pair of elastic arm parts 52, respectively. The second locking projection 57 locks onto the side projection 58 of the ejector main body 2 from the front.
The side protrusions 58 are formed on the outer circumferential surface of the cylinder cylindrical portion 15 at portions located on both sides of the injection tube 20 in the left-right direction L2. That is, the side protrusions 58 are formed in the portions of the outer peripheral surface of the cylinder tube section 15 that are located on both sides of the injection tube section 20 in the radial direction with the injection tube section 20 in between, when viewed from above of the injector main body 2. ing.

As described above, the closing wall 53 is combined with the injection cylinder part 20 in a state where it is prevented from coming off backward by the first locking protrusion 55 and the second locking protrusion 57.

(Nozzle part)
As shown in FIGS. 1 and 2, the nozzle section 3 is attached to the second relay cylinder section 83. Thereby, the nozzle part 3 is attached to the ejector main body 2 via the relay member 80.
The nozzle part 3 is arranged in front of the opposing wall part 81 of the relay member 80, and includes a nozzle wall part 90 in which the ejection hole 4 is formed, and extends rearward from the nozzle wall part 90, and includes a second relay cylinder. An external fitting cylinder part 91 is externally fitted onto the part 83 from the front. Note that the inside of the second relay cylinder part 83 can communicate with the inside of the injection cylinder part 20 through the communication hole 85.

Note that the external fitting cylinder part 91 is rotatably attached to the second relay cylinder part 83 about the axis O3 in a state where it is prevented from coming off in the front direction. Thereby, the nozzle part 3 is combined with the relay member 80 so as to be rotatable around the axis O3.

Further, in a portion of the nozzle wall portion 90 located inside the outer fitting cylinder portion 91, an inner cylinder portion 92 that is externally fitted rotatably with respect to the guide shaft 84 is provided to protrude rearward. A second switching groove 93 is formed in the inner circumferential surface of the inner cylinder portion 92 and extends along the front-rear direction L1. Furthermore, a spin chamber 94 that can communicate with the first switching groove 86 is formed in a concave shape in a portion of the rear surface of the nozzle wall portion 90 that is located inside the inner cylinder portion 92 .

The first switching groove 86 formed in the guide shaft 84 and the second switching groove 93 formed in the inner cylindrical part 92 communicate with each other at a predetermined rotational position of the nozzle part 3 about the axis O3. A disconnection state occurs at the rotational position.
The first switching groove 86 and the second switching groove 93 communicate with each other, so that the jet hole 4 and the inside of the second relay cylinder part 83 communicate with each other through the spin chamber 94, the first switching groove 86, and the second switching groove 93. Therefore, as the nozzle portion 3 rotates around the axis O3, it is possible to switch between a jetting permission state in which jetting of liquid from the jetting hole 4 is permitted and a jetting restriction state in which jetting is restricted. ing.

(Cover body)
As shown in FIG. 1, the cover body 5 is formed to cover the entire vertical supply cylinder section 10 except for the lower end and the entire injection cylinder section 20 from at least both sides in the left-right direction L2 and from above. .

(Operation of trigger type liquid ejector)
Next, a case will be described in which the trigger type liquid ejector 1 configured as described above is used. In addition, by operating the trigger part 61 shown in FIG. shall be.

When the trigger section 61 shown in FIG. The inside is pressurized. Thereby, the liquid in the main cylinder 62 can be supplied into the vertical supply cylinder section 10, and the ball valve 70 is pushed down and pressed against the tapered cylinder 71.

Thereby, the liquid supplied into the vertical supply cylinder part 10 can be supplied into the injection cylinder part 20 through the connection cylinder part 11d and the through hole 23. That is, the liquid supplied into the vertical supply cylinder part 10 can be introduced into the pressure accumulation chamber S3 including the second gap S2. At this time, since the space between the injection cylinder part 20 and the intermediate pressure accumulation shaft 43 is sealed by the interference by the seal part 45 of the pressure accumulation member 40, the pressure in the pressure accumulation chamber S3 is caused by the liquid introduced into the pressure accumulation chamber S3. can be gradually increased.

When the pressure within the pressure accumulating chamber S3 exceeds a predetermined value, the elastic protrusion 51 is elastically deformed along the guide surface 49 of the pressure accumulating member 40 so as to further bend inward in the radial direction of the injection cylinder section 20. Thereby, the pressure accumulating member 40 can be moved rearward against the bias of the elastic protrusion 51. Therefore, the pressure accumulating member 40 can be moved rearward from the blocking position P1, and can be switched to the allowable position P2, which allows communication between the inside of the vertical supply cylinder part 10 and the ejection hole 4 through the inside of the injection cylinder part 20.
That is, as shown in FIG. 5, the seal portion 45 can be moved to the rear of the step wall 20a, and the second gap S2 forming the pressure accumulation chamber S3 can be communicated with the first gap S1.

Therefore, the liquid with increased pressure can be vigorously injected from the injection cylinder part 20 into the second relay cylinder part 83 through the injection opening 21 shown in FIG. It can be guided to the ejection hole 4 through the switching groove 86 and the spin chamber 94, and can be ejected from the ejection hole 4 to the outside.

Note that when the trigger part 61 is released after the liquid is ejected, the supply of liquid from the main cylinder 62 through the vertical supply cylinder part 10 to the injection cylinder part 20 can be stopped. As a result, the pressure within the pressure storage chamber S3 decreases, so that the elastic protrusion 51 undergoes elastic restoration deformation. Therefore, the pressure accumulating member 40 can be urged forward by the elastic protrusion 51, and the pressure accumulating member 40 can be restored forward. Therefore, as shown in FIGS. 1 and 3, the seal portion 45 can be used to seal between the injection cylinder portion 20 and the intermediate pressure accumulation shaft 43, and between the first gap S1 and the second gap S2. communication can be cut off. In particular, by utilizing the interference of the seal portion 45, the space between the injection cylinder portion 20 and the intermediate pressure accumulation shaft 43 can be reliably sealed.

Furthermore, the trigger part 61 can be urged forward by the elastic restoring force of the elastic arm part 52, and the trigger part 61 can be moved to its original position. Therefore, in conjunction with the trigger portion 61, the main piston 63 can be restored and moved forward within the main cylinder 62. Therefore, the pressure inside the main cylinder 62 can be reduced to a pressure lower than the pressure inside the container body A, so that the ball valve 70 can be raised and separated from the tapered cylinder 71.
Therefore, the liquid in the container body A can be sucked up into the vertical supply cylinder section 10 and introduced into the main cylinder 62. This allows preparation for the next eruption.

As described above, according to the trigger type liquid ejector 1 of this embodiment, liquid can be ejected from the ejection hole 4 every time the trigger portion 61 is pulled backward. In particular, since the pressure accumulating member 40 is provided, the pressure of the liquid ejected from the ejection holes 4 can be stabilized, and the liquid can be ejected in a desired manner (for example, in the form of a mist).

Moreover, since the pressure accumulating member 40 is provided within the injection cylinder section 20, the nozzle section 3 can be made smaller and the structure can be reduced, compared to the conventional case in which the pressure accumulating member 40 is provided within the nozzle section 3. It can be simplified, and for example, bulkiness of the nozzle portion 3 in the front-rear direction L1, left-right direction L2, and up-down direction can be easily suppressed. Therefore, the size of the trigger type liquid ejector 1 as a whole can be reduced.
Furthermore, by providing the pressure accumulating member 40 within the injection cylinder section 20, the degree of freedom in the structure of the nozzle section 3 can be increased. Therefore, as in the present embodiment, the trigger type liquid ejector 1 can be operated in a jetting permission state in which jetting from the jetting hole 4 is permitted as the nozzle part 3 rotates, and in a jetting restricted state in which jetting is restricted. It is possible to easily adopt a configuration that switches between the two.

Furthermore, since the pressure accumulating member 40 is provided within the injection cylinder section 20, the internal volume of the injection cylinder section 20 can be reduced without increasing the number of parts. Thereby, when the trigger part 61 is operated, the pressure of the liquid in the injection cylinder part 20 (inside the pressure accumulation chamber S3) can be quickly increased, and the number of times of priming can be suppressed. Furthermore, since it becomes difficult for air to remain in the injection cylinder portion 20, it is possible to suppress variations in the amount of ejection caused by residual air, liquid dripping from the ejection hole 4, etc.

In particular, since a seal portion 45 is formed between the injection cylinder part 20 and the intermediate pressure accumulation shaft 43 of the pressure accumulation member 40, when the pressure accumulation member 40 is in the cutoff position P1, the injection cylinder part 20 and the pressure accumulation member 40 In contrast, the seal portion 45 can be brought into surface contact with an interference margin. Therefore, it is possible to secure a contact area between the injection cylinder part 20 and the pressure accumulating member 40 via the seal part 45, and there is a large resistance between the injection cylinder part 20 and the pressure accumulating member 40 due to interference. force (frictional force) can be secured.
Therefore, when the pressure within the injection cylinder section 20 increases, it is possible to prevent the pressure accumulating member 40 from moving toward the allowable position P2 before reaching the desired pressure value. Therefore, pressure can be accumulated more reliably, and the liquid with increased pressure can be ejected with great force.

Moreover, since the pressure accumulating member 40 is biased forward in advance by the elastic protrusion 51 when the pressure accumulating member 40 is located at the blocking position P1, the pressure accumulating member 40 can be positioned at the blocking position P1. At the same time, the pressure of the liquid within the injection cylinder portion 20 can be accumulated more effectively.

As described above, according to the trigger type liquid ejector 1 of the present embodiment, the nozzle part 3 can be made smaller and the configuration can be simplified, and the entire trigger type liquid ejector 1 can be made smaller. , and can also eject pressurized liquid. In particular, since it is difficult for the pressure accumulating member 40 to move toward the permissible position P2 before reaching a desired pressure value, pressure can be accumulated reliably and the liquid with increased pressure can be spouted appropriately.

Furthermore, in this embodiment, since the seal portion 45 is formed in an annular shape so as to protrude radially outward from the outer peripheral surface of the intermediate pressure accumulation shaft 43, when the pressure accumulation member 40 is located at the cutoff position P1, Furthermore, the seal portion 45 can be tightened in the radial direction between the injection cylinder portion 20 and the pressure accumulating member 40. Thereby, the sealing performance of the seal portion 45 can be improved, and the resistance force (frictional force) between the injection cylinder portion 20 and the pressure accumulating member 40 can be more easily ensured.

Furthermore, in this embodiment, the closing member 50 includes an elastic arm portion 52 that urges the trigger portion 61 forward. Therefore, there is no need to separately provide a biasing member or the like that biases the trigger portion 61 forward, so that the number of parts can be reduced and costs can also be reduced.
In particular, since the closing member 50 having the elastic protrusion 51 and the elastic arm portion 52 can be handled as one unit, it is possible to reduce the number of parts and improve assembly efficiency.

Furthermore, since the pressure accumulation shaft 41 is arranged over the entire length of the injection cylinder part 20, the internal volume of the injection cylinder part 20 can be further reduced. Therefore, it is possible to more effectively reduce the number of times of priming, and it is also possible to suppress air remaining in the injection cylinder section 20.

Further, the closing member 50 is prevented from slipping backward relative to the injection cylinder portion 20 by being locked at a plurality of locations by the first locking protrusion 55 and the second locking protrusion 57. Therefore, the trigger part 61 can be urged forward more stably by using the elastic arm part 52, and the closing member 50 can be prevented from rattling when the trigger part 61 is operated rearward. Easy to stabilize. Furthermore, since the closing member 50 can be more stably combined with the injection tube section 20, the sealing performance between the injection tube section 20 and the closing member 50 can be more firmly ensured, and product reliability can be improved. can be improved.

Although the 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. The embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by those skilled in the art, those that are substantially the same, and those that are equivalent.

For example, in the above embodiment, the trigger mechanism 60 including the main cylinder 62 and the main piston 63 has been described as an example, but the invention is not limited to this case. For example, a configuration may be adopted in which the liquid in the container body A is caused to flow from the inside of the vertical supply cylinder part 10 through the inside of the injection cylinder part 20 toward the ejection hole 4 side by a trigger mechanism equipped with a pump that contracts and deforms in a bellows shape. good.

Furthermore, in the above embodiment, the trigger-type liquid ejector 1 that ejects liquid forward from the ejection hole 4 has been described; however, the invention is not limited to this case; It is also possible to use a trigger-type liquid ejector 1 that ejects liquid toward the target.

Further, in the above embodiment, the case where the elastic protrusion 51 is employed as an example of the elastic body has been described, but the invention is not limited to this case. For example, an elastic member such as a leaf spring is integrated into the closing wall 53. It doesn't matter if you form it.

Furthermore, in the embodiment described above, a member such as a nozzle tip may be provided in the nozzle portion 3, and a spin groove for applying spin to the liquid ejected from the ejection hole 4 may be formed.

Furthermore, in the above embodiment, as shown in FIG. 6, an elastic member 100 such as a coil spring that can be elastically deformed in the front-rear direction L1 is provided between the closing wall 53 of the closing member 50 and the flange portion 47 of the pressure accumulating member 40. It may be provided separately. By doing so, the elastic restoring force of the elastic member 100 such as a coil spring can be used in addition to the elastic restoring force of the elastic protrusion 51, so that the amount of accumulated pressure can be increased.

In addition, in the trigger type liquid ejector 1 of this embodiment, for example, by removing the closing member 50 from the rear cylinder part 22 of the injection cylinder part 20, the pressure accumulating member 40 in which the seal part 45 is formed can be easily incorporated or replaced. etc. can be done. Therefore, the efficiency of assembling the trigger type liquid ejector 1 can be improved.
Further, depending on the application, for example, instead of the pressure accumulating member 40 having the seal portion 45, a pressure accumulating member having only the tapered surface 46 formed without the seal portion 45 may be incorporated. Since the pressure accumulating member in this case does not include the seal portion 45, it is easy to move the pressure accumulating member rearward as the liquid rises in the injection cylinder portion 20 (inside the pressure accumulating chamber S3) and quickly jet out the liquid. Therefore, by operating the trigger portion 61, it is possible to easily switch the production to a so-called direct pressure type trigger type liquid ejector that can easily eject liquid.

A...Container body O2...Axis of injection cylinder part P1...Block position P2...Permissible position 1...Trigger type liquid ejector 2...Ejector main body 3...Nozzle part 4...Ejection hole 10...Vertical supply cylinder part 20...Injection cylinder part 40...Pressure accumulation member 45...Seal part 50...Closing member 51...Elastic protrusion (elastic body)
52...Elastic arm part 53...Closing wall 60...Trigger mechanism 61...Trigger part

Claims (4)

an ejector body attached to a container body containing liquid;
a nozzle part attached to the ejector main body and formed with an ejection hole for ejecting liquid;
The ejector main body is
a vertical supply cylinder portion that sucks up liquid from the container body;
an injection cylinder part extending from the vertical supply cylinder part and opening to the outside of the injector main body;
It has a trigger part disposed so as to be movable rearward in a forward biased state, and by moving the trigger part rearward, the liquid is directed from the inside of the vertical supply cylinder part through the inside of the injection cylinder part to the side of the ejection hole. a trigger mechanism for circulating;
From a blocking position, which is movably disposed within the injection cylinder section and blocks communication between the inside of the vertical supply cylinder section and the ejection hole through the injection cylinder section due to an increase in pressure within the injection cylinder section. a pressure accumulating member that is switched to a permissible position that allows the communication by moving rearward;
A seal part is formed between the injection cylinder part and the pressure accumulating member, which extends along the axial direction of the injection cylinder part and extends over the entire length in the circumferential direction around the axis,
The trigger-type liquid ejector is characterized in that the seal portion makes surface contact with the injection cylinder portion and the pressure accumulating member in the cutoff position. The triggered liquid ejector according to claim 1,
The seal portion is formed in an annular shape that protrudes radially outward from the outer peripheral surface of the pressure accumulating member and extends over the entire circumference of the pressure accumulating member. A trigger-type liquid ejector that presses against the object from the inside in the radial direction. The trigger type liquid ejector according to claim 1 or 2,
The pressure accumulating member is a trigger-type liquid ejector that is biased forward with a biasing force of 2.5N to 9.5N. The trigger type liquid ejector according to claim 1 or 2,
an elastic arm portion that biases the trigger portion forward;
an elastic body that contacts the pressure accumulating member from behind,
The elastic body allows the pressure accumulating member to move rearward by being elastically deformed due to an increase in pressure within the injection cylinder, and is elastically deformed by restoring as the pressure within the injection cylinder decreases. urging the pressure accumulating member forward;
The trigger-type liquid ejector, wherein the elastic body and the elastic arm are integrally formed.

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