JP3958497B2 - 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]
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]
In such a trigger-type liquid ejector, the contents remain in the piston cylinder even when the content injection is stopped, and a slight force is applied to the trigger even though the contents are not intended to be injected. There is a problem that the contents are discharged when it acts, especially if the contents are filled with liquid detergent or mold remover, the infant accidentally touches the trigger and inadvertently sprays. It is necessary to prevent this from happening.
[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 which is rotated against the spring pressing force of the tab and has a structure in which an extension and a protrusion for releasing the contact engagement between the pump main body are provided.
[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 bias 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 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 to pass the inside of the container body through the nozzle head. A trigger-type liquid ejector that injects the contents of
The ejector includes a stopper on the nozzle head that can rotate together with the nozzle head and stops the injection of the contents by locking the movement of the trigger.
The stopper covers the check portion of the trigger and locks the trigger, and the stopper is connected to the cover portion and abuts against the projecting end surface of the cylinder that holds the piston so as to be able to advance and retreat, thereby preventing the operation of the piston. a double lock type having an arm portion to lock the trigger,
The cover portion is a trigger type liquid ejector formed on a surface of the cover portion along the trigger and having a fin that prevents the trigger from being locked by a stopper.
[0008]
In the ejector configured as described above, it is desirable that the stopper is formed integrally with the nozzle head or is a cover type that is fixed and held by covering the nozzle head.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The trigger type liquid ejector according to the present invention is configured by simultaneously disposing a stopper on a part where the nozzle head is rotated and the trigger is checked, and on the projecting end face of the cylinder holding the piston to prevent the operation of the piston. Since the double lock type that locks the trigger is used, the contents are not easily ejected.
[0010]
Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIGS. 1A to 1C show the configuration of a trigger type liquid ejector according to the present invention with respect to its side, bottom and front. 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 rotatably attached to the ejector body 3 and injects the contents that have passed through the ejection passage of the ejector body to the outside through a nozzle tip provided at the tip thereof.
[0011]
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 brought into the cylinder 5 so as to be swingable by the injector body 2 by pressing the piston 5a. Reference numeral 7 denotes an example in which the nozzle head 4 is integrally formed. It is a stopper. The stopper 7 includes a cover portion 7 a that covers the check portion 6 a of the trigger 6 and an arm portion 7 b that is connected to the cover portion 7 a and contacts the protruding end of the cylinder 5. The cover portion 7 a has fins 7 c along the trigger 6. Is provided.
[0012]
As shown in FIGS. 1 (a) to 1 (c), the ejector according to the present invention prevents the movement (checking) of the trigger 6 at the two positions of the cover portion 7a and the arm portion 7b of the stopper 7, The contents will not be unintentionally ejected or inadvertently ejected. Further, even if the trigger 6 is tried to check in the locked state by the stopper 7, the fin 7c is located on the cover portion 7a, so that it can be understood that it is locked by tactile sense, and an infant or the like tries to move the trigger 6 forcibly. But because the concentration of power here is painful and helps to end that attempt.
[0013]
Release of the lock by the stopper 7 is performed by rotating the stopper 7 together with the nozzle head 4 as shown in FIG.
[0014]
As described above, in the present invention, the stopper 7 can reliably prevent the contents from being accidentally ejected, and when the contents are ejected, the stopper 7 is locked to the nozzle head 4. Since it can be easily released only by turning, the operability is very good.
[0015]
FIG. 1 shows an example of the structure shown in FIG. 3 in which the stopper 7 is provided integrally with the nozzle head 4, but as shown in FIG. It may be of a cover type that is fixed and held by covering.
[0016]
FIG. 5 shows an example in which an engagement protrusion 7 c is provided on the arm portion 7 b of the cover type stopper 7. When the trigger 6 is locked, as shown in FIGS. 6 (a) and 6 (b), the engagement protrusion 7c is positioned so as to be in contact with the cylinder 5, thereby enabling more reliable locking.
[0017]
FIG. 7 shows a cross-sectional structure of the trigger type liquid ejector. A spring s for determining the initial position of the piston 5a is disposed between the cylinder 5 and the piston 5a, and a space r for drawing in the contents is formed. 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.
[0018]
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 valve 10 and the passage 11 provided in the ejector body 3, passes through the nozzle head 4, and is ejected to the outside from the nozzle tip 12 disposed at the tip thereof. By repeating the process, the contents are continuously ejected.
[0019]
【The invention's effect】
According to the present invention, the trigger can be surely locked in the trigger type liquid ejector, so that it is possible to prevent an unintentional ejection or inadvertent ejection, and the lock only rotates the nozzle head. Since it can be released with, the operability is extremely excellent.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a configuration of a trigger type liquid ejector according to the present invention, wherein (a) shows a side surface, (b) shows a bottom surface, and (c) shows a front surface. It is shown.
FIG. 2 is a diagram illustrating a state in which a trigger is unlocked.
FIG. 3 is a view showing an example of a stopper integrated with a nozzle head.
FIG. 4 is a view showing an example of a cover type stopper.
FIG. 5 is a view showing another example of a stopper suitable for application to the present invention.
FIG. 6 is an explanatory diagram of a content ejection procedure.
FIG. 7 is a view showing a cross-sectional structure of a trigger type liquid ejector.
[Explanation of symbols]
Reference Signs List 1 Attachment 2 Pipe 3 Sprayer body 4 Nozzle head 5 Cylinder 6 Trigger 7 Stopper 8 Check valve 9 Port
10 Valve
11 Passage
12 Nozzle tip

Claims (3)

It has an attachment part that engages with the opening of the container body, and the contents inside the container body are passed through the nozzle head by repeating the piston pressing operation by trigger check and the piston return operation by releasing the check. A trigger type liquid ejector adapted to eject,
The ejector includes a stopper on the nozzle head that can rotate together with the nozzle head and stops the injection of the contents by locking the movement of the trigger.
This stopper covers the check part of the trigger and locks the trigger, and locks the trigger by contacting the front end surface of the cylinder holding the piston and blocking the operation of the piston. a double lock type having an arm portion,
The trigger type liquid ejector according to claim 1, wherein the cover portion has fins formed on the surface thereof along the trigger to prevent the trigger from being locked in a locked state by a stopper.   The trigger type liquid ejector according to claim 1, wherein the stopper is formed integrally with the nozzle head.   The trigger type liquid ejector according to claim 1, wherein the stopper is of a cover type that is fixedly held by covering the nozzle head.

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