JPH0446843Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a trigger-type liquid ejector that is installed to directly eject mist, foam, or liquid.

``Prior Art'' This type of liquid ejector is disclosed in Japanese Patent Application Laid-open No. 149917/1983. The liquid ejector is configured such that from the rear end of the injection cylinder,
The lower end of the base cylinder is attached to the mouth and neck of the container body, and the rear part is inserted into the cylinder hole opened in the front surface of the base cylinder and drilled in the main body in a forward biased state. a trigger having an upper end pivotally attached to the front part of the injection cylinder part and a trigger having a rear face engaged with the front end of the plunger and hanging down;
By operating the trigger, the liquid inside the container is sucked into the main body and sprayed from a nozzle hole at the front end of the injection cylinder. Then, to prevent the negative pressure inside the container body due to the decrease of liquid, an outside air intake hole is bored in the front of the lower part of the base cylinder part, and the hole is sealed with an elastic cylinder fitted into the lower part of the base cylinder part to suck outside air. When the plunger is retracted by the trigger operation, the rear end of the pusher, which functions as a valve and hangs down from the front part of the plunger and projects rearward in an L-shape, enters into the base cylinder part from the outside air intake hole and pushes the elastic cylinder. The container is elastically deformed, and as a result of the deformation, the outside air suction valve opens, allowing outside air to flow into the container body, thereby eliminating the negative pressure.

``Problem to be solved by the invention'' In the case of the above conventional example, the elastic cylinder fitted into the upright base cylinder is pushed backwards with a pusher attached to the plunger and elastically deformed, and the elastic deformation causes outside air to be drawn in. Since the valve is opened, the retracted position of the plunger, and thus the rear end of the pusher, changes depending on whether the trigger is pulled a lot or a little, so the amount of elastic deformation of the elastic cylinder is not constant. Therefore, if the amount of elastic deformation is larger than necessary, the durability of the elastic cylinder will be impaired, and if the required amount of deformation is not reached, the intake of outside air from the outside air intake valve will be insufficient. . In addition, since a considerable amount of force is required to elastically deform the wall of the elastic cylinder toward the rear of the cylinder, the plunger is designed to respond to the feeling when the rear end of the pusher contacts the elastic cylinder by pulling the trigger. There were cases where the trigger would elastically return to its original state under the illusion of a response when the limit was reached, resulting in incomplete intake of outside air.

This design eliminates these drawbacks and allows the valve body to elastically move downwards to open the outside air intake valve, in contrast to the pusher that moves backward.The amount of valve body deformation is independent of the trigger pull size. can be kept constant at all times, and the force required to deform the valve body is reduced, eliminating the feeling of feeling when pushing down the valve body.

"Means for Solving the Problems" From the rear end of the injection cylinder 4, the base cylinder part 5 whose lower end is attached to the mouth and neck of the container is suspended, and the main body part is opened to the front surface of the base cylinder part. A plunger 7 whose rear portion is fitted in a forward biased state into a cylinder hole 6 bored in the main body, and whose upper end is pivotally connected to the front portion of the injection cylinder portion 4 and whose rear surface is attached to the front end of the plunger. A trigger-type liquid ejector having a trigger 8 that is engaged with and hangs down, and which is provided so that when the trigger is operated, the liquid inside the container is sucked into the main body and is ejected from a nozzle hole at the front end of the injection cylinder part. , a tapered flange hole 17 is opened at the lower surface and at the upper end from the front part of the lower end of the base cylinder part 5 attached to the mouth and neck of the container body.
A cylindrical portion 17 to which an inward flange with a shape is attached is erected, several elastic leg pieces 18c are erected from an elastic ring 18b into the cylindrical portion 17, and a taper plug 18a is attached to the upper end of these leg pieces. The elastic valve body 18 that
The elastic ring fits into the lower end of the cylindrical portion 17, and the lower part of the tapered plug 18 is formed into a tapered flange hole 17a.
The upper part of the taper plug 18a is sealed and installed in such a manner that the upper part of the taper plug protrudes above the inward flange, and when the plunger 7 retreats, the upper surface of the taper plug 18a is attached to the elastic leg piece 1.
Press down against the bias of 8c to open the tapered flange hole 1.
Outside air intake valve 1 formed by 7a and taper plug 18a
A pusher 20 for opening the plunger 9 was made to protrude rearward from the front part of the plunger 7.

"Operation" When the trigger 8 is pulled toward the main body, the rear surface of the trigger pushes the plunger 7 backward against the bias, and the pusher 20 of the plunger pushes down the taper stopper 18a of the elastic valve body 18. The outside air suction valve 19 is opened, and outside air enters the container body 1 through the inside of the cylindrical portion 17, thereby preventing negative pressure inside the container body due to a decrease in liquid. When the trigger is released, the plunger 7 is moved forward by the spring, the elastic valve body 18 is restored to close the outside air suction valve 19, and the trigger 8 is returned to its original position by the forward movement of the plunger.

The liquid inside the container becomes negative pressure due to the forward movement of the plunger, which causes the liquid suction valve 10 to open and is sucked into the pump chamber through the suction pipe 9, and when the plunger 7 retreats due to the pull of the trigger, the high pressure caused by the retreat occurs. As a result, the liquid inside the pump chamber opens the discharge valve 11 and is sprayed from the nozzle hole at the front end of the injection cylinder section 4.

"Example" 1 is a container body, and 2 is a mouth and neck portion of the container body.

A liquid ejector 3 is detachably attached to the mouth and neck. The liquid ejector includes a main body part from which a base cylinder part 5 whose lower end is attached to the mouth and neck of the container body hangs down from the rear end of the injection cylinder part 4, and a main body part which is opened at the front surface of the base cylinder part 5. A plunger 7 whose rear portion is fitted in a forward biased state into a cylinder hole 6 bored in the injection cylinder portion 4; A suction pipe 9 is suspended from the lower surface of the base cylinder into the container body, and a suction valve 10 is provided above the pipe.
A discharge valve 11 is provided within the injection cylinder portion 4, and the rear end of the cylinder hole 6 is opened into the main body portion between the suction valve and the discharge valve. Reference numeral 12 denotes a mounting cylinder for fixing the lower end of the base cylinder onto the top surface of the mouth of the container, and an inward flange 13 attached to the upper end of the mounting cylinder is engaged with the upper surface of an outward flange 14 attached to the lower end of the base cylinder. The lower surface of the outward flange 14 is brought into pressure contact with the top surface of the container body by screwing the internal thread 15 on the inner surface of the mounting cylinder to the neck of the container body. The structure described above is conventionally known, and a spin mechanism 16 for spraying, a foaming mechanism, or the like is provided at the front end of the injection cylinder.

In this proposal, the base cylinder 5 is attached to the mouth and neck of the container body.
A cylindrical part 17 having a lower opening, that is, an inward flange with a tapered flange hole 17a at the upper end, is erected from the lower front part of the cylindrical part 17, and an elastic valve body 18 is fitted into the cylindrical part 17. I made him wear it. The elastic valve body includes several elastic leg pieces 18c from an elastic ring 18b.
A taper stopper 18a is attached to the upper end of the leg piece by standing up, and the lower part of the taper stopper is fitted airtightly into the tapered flange hole 17a by the biasing force of the elastic leg piece 18c to open the outside air intake valve 19. The upper part of the taper plug projects above the inward flange.
The outside air intake valve 19 is opened by pressing down the upper protrusion of the taper plug.
is opened, and when the press is released, the taper stopper 18a rises due to the elastic restoration of the leg piece 18c, thereby closing the outside air intake valve. Further, a pusher 20 for pushing down the upper part of the taper plug to open the outside air suction valve 19 is provided to protrude rearward from the front part of the plunger 7 mentioned above. The pusher 20 is provided so as to be able to push down the upper part of the taper plug 18a when the plunger 7 is retreated by pulling the trigger 8. Therefore, the rear end surface of the pusher 20 is made into a spherical shape so that it can easily ride on the tapered stopper and press down the taper stopper.

"Effect of the invention" The present invention has the above-mentioned configuration, in which the cylindrical part 17 having an inward flange with a tapered flange hole 17a at the upper end is erected from the lower front part of the base cylindrical part 5, and A tapered stopper 18a is attached to the upper end of the elastic leg piece 18c that stands up from the elastic ring 18b fitted into the lower part, and the above-mentioned flange hole 17 is attached at the lower end of the tapered stopper.
a is sealed and its upper part stands up above the inward flange, and since the pusher 20 that presses down the upper surface of the taper plug 18a when the plunger 7 retreats is protruded backward from the front part of the plunger, the moving distance of the pusher is That is, the amount of descent of the taper plug 18a can be made substantially constant regardless of the magnitude of the pulling width of the trigger 8, and thus the durability of the elastic valve body 18 can be improved. Further, since both the taper plug 18a and the flange hole 17 are tapered, the flange hole can be opened and closed reliably, and the taper plug 18a can be easily lowered by moving the pusher 20 backward. Furthermore, since the elastic leg piece 18c of the elastic valve body 18 only needs to press the taper plug 18a into contact with the flange hole 17a, it can be formed of several strips, and therefore the force required to push down the taper plug is small. It is possible to eliminate the feeling of feeling when the presser 20 presses down the taper stopper 18a when the trigger is pulled. Furthermore, by increasing the length of the pusher 20, it is possible to adjust the time during which the pusher presses down the taper stopper 18a, that is, the time during which the outside air intake valve is open.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the liquid ejector of the present invention. 4... Injection cylinder part, 5... Base cylinder part, 7... Plunger, 8... Trigger, 18... Elastic valve body, 19
...Outside air intake valve.

Claims (1)

[Scope of utility model registration request] A trigger type liquid ejector has a main body portion which has a base tube portion 5 hanging down from the rear end of an injection tube portion 4 and has a lower end attached to the mouth and neck of a container body, a plunger 7 whose rear portion is fitted in a forward biased state into a cylinder hole 6 opened on the front surface of the base tube portion and drilled in the main body portion, and a trigger 8 which has its upper end pivotally attached to the front portion of the injection tube portion 4 and hangs down with its rear surface engaged with the front end of the plunger, and which is arranged so that liquid inside the container body is sucked into the main body portion by operating the trigger and ejected from a nozzle hole at the front end of the injection tube portion.
A cylindrical portion 17 having an inward flange with a groove is erected, and an elastic valve body 18 having several elastic legs 18c erected from an elastic ring 18b and tapered plugs 18a attached to the upper ends of the legs is inserted into the cylindrical portion 17.
The elastic ring is fitted into the lower end of the cylindrical portion 17, and the lower portion of the tapered plug 18 is fitted into the tapered flange hole 17a.
When the plunger 7 is retracted, the upper surface of the tapered plug 18a contacts the elastic leg piece 1
8c against the biasing force to press down the tapered flange hole 1
The outside air intake valve 17a and the taper plug 18a form
A trigger type liquid ejector characterized in that a pusher 20 for opening the plunger 9 projects rearward from the front of the plunger 7.