JP3863347B2 - Trigger type liquid ejector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trigger-type liquid ejector, and is intended to reliably prevent ejection contrary to the meaning of the contents and inadvertent ejection.
[0002]
[Prior art]
The trigger type liquid ejector draws the contents stored in the container body into the piston cylinder during the return process of the piston pressed by the trigger check, and this content is further increased by the pressure of the piston. Originally, the nozzle is ejected from the tip of the nozzle head by being pushed out.
[0003]
By the way, such a trigger type liquid ejector is used as a trigger even though the content injection is stopped and the content remains in the piston cylinder and the content injection is not intended. There is a problem that the contents are discharged when a slight force is applied, especially when the contents are filled with liquid detergent or mold remover, and the infant accidentally touches the trigger accidentally. Therefore, it is necessary to reliably prevent injection.
[0004]
As an attempt to avoid unintentional injection or inadvertent injection in the trigger type liquid ejector, for example, Japanese Patent Publication No. 8-24861 is provided with a latch device that prohibits the trigger operation of the trigger lever actuator. In the device, in the prohibit mode of trigger operation, the extension portion that contacts and engages the pump body, the tab that maintains the contact engagement of the extension portion by spring pressing force in the prohibit mode, and the release mode that performs the trigger operation There has been proposed a liquid dispensing device that is rotated against a spring pressing force of a tab and has a structure provided with a protrusion that releases the contact engagement between the extension portion and the pump body.
[0005]
However, in the conventional apparatus as described above, since the man-hours are required for assembling due to the complicated structure of the ejector itself, there is a problem in productivity, and when the contents are injected, the latch device is extended. Since it is necessary to always urge the protrusion upward or downward so that the portion does not come into contact with the free end of the cylinder to enter the prohibit mode, it cannot be said that the operability is good.
[0006]
An object of the present invention is to propose a trigger type liquid ejector excellent in operability that can be easily locked and released without complicating the structure and deteriorating operability.
[0007]
[Means for Solving the Problems]
The present invention has an attachment portion that engages with the opening of the container body, and repeats the piston pressing operation by the trigger check and the piston return operation by releasing the check, thereby allowing the inside of the container body to pass through the nozzle head. A trigger type liquid ejector configured to eject contents,
The ejector has a stopper that is swingably held by the nozzle head,
The stopper includes a stopper body that prevents the trigger from being checked by covering the injection port and the trigger of the contents, and at least one of the stopper body that is integrally connected to the stopper body and that abuts the tip surface of the cylinder that holds the piston. A trigger type liquid ejector comprising an arm portion.
[0008]
In the liquid ejector configured as described above, it is particularly preferable that the stopper has a fin on its front surface that prevents the trigger from being locked in the locked state.
Moreover, it is preferable that the stopper has an airtight seal portion that seals the injection port in a locked state at a portion covering the injection port.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The trigger type liquid ejector according to the present invention pivotably supports the stopper on the nozzle head so as to be swingable, and the trigger can be locked and released only by rotating the stopper with the pivotal portion as a fulcrum. In addition to being able to lock, it is extremely excellent in operability.
[0010]
Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIGS. 1 (a), 1 (b) and 2 (a), 2 (b) show the configuration of the trigger type liquid ejector according to the present invention on the side, plane, front and back, respectively.
[0011]
In the figure, reference numeral 1 denotes an attachment portion that can be engaged with the opening of the container main body by, for example, screwing, 2 is a pipe for sucking up the contents in the container, 3 is an ejector main body having an injection passage for the contents, Reference numeral 4 denotes a nozzle head that is attached to the ejector body 3 and injects the contents that have passed through the ejection passage of the ejector body 3 to the outside through a nozzle tip provided at the tip thereof.
[0012]
Reference numeral 5 denotes a cylinder. The cylinder 5 is arranged at a fixed position by a spring, and a piston 5a capable of reciprocating in the cylinder 5 by an external force is inserted therein. Reference numeral 6 denotes a trigger for injecting the contents, which are held by the injector main body 2 in a swingable manner and called into the cylinder 5, by pressing the piston 5a.
[0013]
Reference numeral 7 denotes a stopper shown in a locked state. The stopper 7 is pivotally supported by the nozzle head 4 and can swing around a fulcrum 8. The cover type stopper body locks the movement of the trigger by covering the nozzle tip and the trigger 6 which are the injection ports for the contents. 7a and an arm portion 7b that is integrally connected to this and abuts against the front end surface of the cylinder 5 that holds the piston. A fin 7c that extends along the longitudinal direction of the stopper 7 is provided on the front surface of the stopper body 7a. .
[0014]
In the ejector shown in FIGS. 1 and 2, the injection port and the trigger of the contents are covered with the stopper 7, and the tip of the arm portion 7 b of the stopper 7 is brought into contact with the tip surface of the cylinder 5. The trigger movement is locked. To release the lock, it is only necessary to rotate the stopper 7 around the fulcrum 8 as shown by the phantom line in FIG.
[0015]
The stopper 7 covers the nozzle tip, which is the injection port for the contents, together with the trigger 6 and locks the trigger 6 by bringing the arm portion 7b into contact with the tip surface of the cylinder 5, so that the contents can be used. On the contrary, it is not injected or inadvertently injected. Further, even if the trigger 6 is to be checked in the locked state by the stopper 7, since the fin 7 c is provided on the front surface of the stopper 7, it is understood that it is locked by tactile sense, and an infant etc. forcibly triggers the trigger 6. Even if you try to move it, the power concentrates here, so it is painful and helps to end that attempt. Regarding the arm portion 7b of the stopper 7, two triggers 6 can be provided on the left and right so as to sandwich the trigger 6 from both sides, but can also be provided on either the left or right.
[0016]
As described above, in the present invention, by locking the trigger 6 with the stopper 7, it is possible to reliably prevent the contents from being accidentally injected, but when injecting the contents, Since the stopper 7 can be easily released only by turning around the fulcrum 8 of the nozzle head 4, the operability is very good.
[0017]
3 (a) and 3 (b) show only the stopper 7 and show the front and rear appearances thereof, and FIG. 4 shows the cross-sectional structure of the trigger type liquid ejector.
[0018]
In the structure shown in FIG. 4 above, a spring s for determining the initial position of the piston 5a is arranged between the cylinder 5 and the piston 5a, and a space r for drawing in the contents is formed. Has been. In a state where the lock by the stopper 7 is released, the piston 5a is pressed against the wall surface of the cylinder 5 by the check of the trigger 6, and when the check of the trigger 6 is released at that time, the piston 5a is moved by the elastic force of the spring s. At this time, since the space r becomes negative pressure, the content in the container body flows into the space r through the pipe 2, the check valve 8 and the port 9.
[0019]
If the trigger 6 is further depressed from this state and the piston 5a is pressed, the contents flowing into the space r are discharged from the port 9, and at this time, the check valve 8 is maintained in the closed state. The object passes through the passage 10 provided in the ejector main body 3, passes through the nozzle head 4, and is ejected from the nozzle tip 11 disposed at the tip thereof to the outside world, and the trigger 6 is repeatedly checked and released. Thus, the contents are continuously ejected.
[0020]
FIG. 5 shows another configuration example of the trigger type ejector according to the present invention.
Depending on the contents to be ejected, the contents remaining at the ejection port of the nozzle tip 11 may be dried and solidified to block the nozzle. In order to prevent such nozzle clogging, it is preferable that the stopper 7 is integrally provided with an annular hermetic seal portion 12 so as to surround the nozzle port of the nozzle tip 11 in the locked state. The annular hermetic seal portion 12 is not limited to this, and various forms of sealing mechanisms can be applied as long as the nozzles can be sealed to prevent nozzle clogging.
[0021]
【The invention's effect】
According to the present invention, since the trigger can be reliably locked in the trigger type liquid ejector, it is possible to prevent ejection contrary to the meaning of the contents and inadvertent ejection. In addition, since the trigger lock can be released simply by rotating the stopper with the pivotal support portion of the nozzle head as a fulcrum, the operability is extremely excellent.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration explanatory view of a trigger type liquid ejector according to the present invention, in which (a) shows a side surface and (b) shows a plane.
FIGS. 2A and 2B are explanatory diagrams of a configuration of a trigger type liquid ejector according to the present invention, in which FIG. 2A shows a front view and FIG. 2B shows a rear view; .
FIGS. 3A and 3B are external perspective views of a stopper, in which FIG. 3A shows the front surface and FIG. 3B shows the back surface.
FIG. 4 is a cross-sectional view of a trigger type liquid ejector according to the present invention.
FIG. 5 is a view showing another configuration example of the trigger type liquid ejector according to the present invention.
[Explanation of symbols]
Reference Signs List 1 Attached part 2 Pipe 3 Jet body 4 Nozzle head 5 Cylinder 6 Trigger 7 Stopper 8 Check valve 9 Port
10 passage
11 Nozzle tip
12 Annular airtight seal

Claims (3)

It has an attachment part that engages with the opening of the container body, and injects the contents in the container body through the nozzle head by repeating the piston pressing operation by the trigger check and the piston return operation by releasing the check. A trigger-type liquid ejector
The ejector has a stopper that is swingably held by the nozzle head,
The stopper includes a stopper body that prevents the trigger from being checked by covering the injection port and the trigger of the contents, and at least one of the stopper body that is integrally connected to the stopper body and that abuts the tip surface of the cylinder that holds the piston. A trigger type liquid ejector comprising an arm portion. The trigger type liquid ejector according to claim 1, wherein the stopper has a fin on its front face to prevent the trigger from being locked in the locked state. The trigger type liquid ejector according to claim 1 or 2, wherein the stopper has an airtight seal portion that seals the ejection port in a locked state at a portion covering the ejection port.

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