JPH0446844Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a trigger type liquid ejector that is attached to a liquid container and can discharge or spray the liquid in the container.

BACKGROUND ART Conventional trigger type liquid ejectors include those described in, for example, Japanese Patent Publication No. 41726/1982 and Japanese Utility Model Publication No. 920/1983.

In either case, a discharge device main body is removably screwed onto the mouth and neck of a liquid container, and the main body includes a pump that is manually operated by a trigger to suck up and force-feed the liquid in the liquid container, and a pump that discharges the pumped liquid. A discharge portion is formed to discharge the liquid in the liquid container by manually operating a trigger.

Problems to be solved by the invention What is described in the above-mentioned Japanese Patent Publication No. 54-41726 is:
Since the pump chamber also serves as a spring chamber, and the spring is installed inside the pump chamber, and the spring is always directly immersed in the discharged liquid, there is a risk of rusting, elution, etc., which limits its use.

Moreover, what is described in the above-mentioned Utility Model Publication No. 61-920 is
Although it forms an inner and outer double cylinder, the structure in which the inner cylinder is used as a pump chamber, a spring is installed in the pump chamber, and the spring is constantly immersed in the discharged liquid is the same as the above-mentioned one. There was a problem.

Means for Solving the Problems The present invention comprises a pump as described above, which is equipped with a liquid discharge port and is actuated by a trigger, and is provided with a container attachment part, and the pump which is actuated by the trigger is provided with a container attachment part. , an annular cylinder consisting of a concentric outer cylinder and an inner cylinder with double inner and outer cylinders protruding forward from the main body; and an annular cylinder that is fitted into the annular cylinder and slides on the inner surface of the outer cylinder and the outer surface of the inner cylinder. A piston body is provided with an annular piston, and skirts are formed at the edges of the piston body that slide on the sliding surfaces of the outer cylinder and the inner cylinder, respectively, and are expanded toward the sliding surfaces. and a trigger-type liquid ejector, wherein a spring for urging the piston body outward from the axis is built into a spring chamber formed by the inner cavity on the axis side of the piston body fitted into the inner cylinder. The spring chamber is always open only to the atmosphere, and each time the piston body is operated by the trigger, the intake valve, which communicates the container mouth with the atmosphere, connects the outer cylinder and the sliding surface of the annular piston that contacts the inner surface of the outer cylinder. The above-mentioned problem could be solved by the trigger type liquid ejector having the structure formed between the two.

Operation With the above-mentioned configuration, the spring is never immersed in the discharged liquid regardless of the attitude of the liquid container to which the trigger-type liquid discharger is attached, such as when it falls over, and moreover, it is always communicated only with the atmosphere. Since it is completely built into the spring chamber, there is no damage to the spring itself or to the operator due to the spring, and the pump action is completely performed, and the suction action of the container is also performed smoothly by the intake valve. There will be no leakage of liquid.

Examples Examples shown in the drawings will be described below. 1st
The embodiment shown in FIGS. 4 to 4 includes a discharge port body 2 having a discharge port 1 at the front end, a pump 4 actuated by a trigger 3, and a container mounting portion 5.
A trigger-type liquid ejector provided with a
The pump 4, which is activated by the trigger 3, has a concentric outer cylinder 7 and an inner cylinder 8, which are protruded from the front of the main body 6.
an annular cylinder 9 consisting of an inner and outer double cylinder, and an annular piston 49 that is fitted into the annular cylinder 9 and slides on an inner surface 10 of the outer cylinder and an outer surface 11 of the inner cylinder.
A piston body 12 is provided with a piston body 12, and an inner skirt 14 that opens inward is arranged in an annular shape on the inner edge in the axial direction of an inner sliding surface 13 that is a sliding surface on the inner cylinder outer surface 11 of the piston body 12. The outer sliding surface 15, which is a sliding surface with the inner surface 10 of the outer cylinder, is provided with an annular inner and outer skirt 16 and an outer outer skirt 17, respectively, at both the inner and outer edges in the axial direction. An annular piston 49 is formed, and the piston body 12 is attached outward from the axis into a spring chamber 19 formed by the inner cylinder 8 and the inner bore 18 on the axis side of the piston body 12 fitted into the inner cylinder 8. A spring 20 is built in to bias the spring chamber 1.
9 is the piston body 1 as shown in FIGS. 2 and 4.
An outer outer skirt 17 and an inner outer skirt 16 are always communicated with the atmosphere through an air hole 22 formed in the head 21 of the piston body 2, and are provided on the outer sliding surface 15 of the outer cylinder 7 and the piston body 12. An intake valve 23 for intake air supplied to the container is configured by the above.

An outer cylindrical portion 24 is formed in the vertical direction adjacent to the rear end of the annular cylinder 9 of the main body 6, and the outer cylindrical portion 24
An inner cylindrical body 25 is fitted inside. The inner cylinder body 25
The lower end portion is an enlarged engaging portion 26, and a flange 27 that can come into contact with the mouth and neck of the container is formed in a protruding manner. The engagement groove 29 formed on the lower edge of the main body 6 into which the fitting portion 26 is inserted allows the engagement outer ring 28 to be fitted into the engagement groove 29 and the inner cylindrical body 25 of the main body 6 to be inserted into the engagement groove 29. It plays a role in preventing insertion and removal. A cap 30 is engaged with the flange 27 so as to be rotatable but not detachable, thereby forming the container attachment portion 5. A suction pipe 31 that can reach the bottom of the container is fitted into the lower end of the cap 30 of the inner cylindrical body 25, and a ball valve seat 33 is formed at the upper end of the suction pipe 31 through a valve hole 32. A cylindrical inter-valve chamber 34 is formed above the seat 33, and a ball valve 35 is housed within the inter-valve chamber 34. Also, the outer cylinder 7 of the pump 4
The cylinder chamber 36 formed between the cylinder chamber 36 and the inner cylinder 8 and the intervalve chamber 34 are defined by a cylinder continuous hole 37 formed in the bottom of the cylinder chamber 36 and an inner cylinder continuous hole formed in the inner cylinder body 25. 38.

A discharge valve chamber 39 having a larger diameter is formed in series with the upper end of the intervalve chamber 34, and a discharge valve body 40 is mounted within the discharge valve chamber 39.

In the embodiment shown in FIG. 2, the discharge valve body 40 has a valve flange 42 formed at its lower end that can come into contact with a discharge valve seat 41 formed at the lower end of the discharge valve chamber 39, and a valve flange 42 that can abut on the discharge valve seat 41 formed at the lower end of the discharge valve chamber 39, and the discharge valve body 40 at its upper end. A fitting end 43 is formed between the fitting end 43 and the valve flange 42, and is extendable and retractable in the form of a double ring, and normally brings the valve flange 42 into contact with the discharge valve seat 41. An elastic portion 44 is formed to bias the direction.

A discharge passage 45 communicating from the discharge valve chamber 39 to the front discharge port 1 is formed.

A connecting hole 4 is provided at the upper end of the engaging portion 26 of the inner cylindrical body 25.
6 is bored, and a ventilation hole 47 is bored in the lowermost side of the outer cylinder 7, and the ventilation hole 47 and the connection hole 4
6 through a groove 48.

As shown in FIG. 2, the ventilation hole 47 is formed between the inner outer skirt 16 and the outer outer skirt 1 at the position where the piston body 12 is most protruded forward.
The piston body 12 is bored so as to be located in the middle of the contact position with the inner surface 16 of the outer cylinder and in front of the position of the outer outer skirt 17 at the position where the piston body 12 is retracted by the trigger 3.

In the illustrated example, the outlet body 2 may have various shapes. The illustrated example is for foam and fog.

This embodiment has the above-mentioned configuration, and the pump 4
The cylinder 9 has a double inner and outer cylinder, and the inside of the inner cylinder 8 is a spring chamber 19, and the spring chamber 19 is always communicated with the atmosphere, so that the spring 20 is never immersed in the discharged liquid. There is no fear of rusting or elution, and the spring 20
There is no need for separate seals because the cylinder chamber 36 is formed between the inner and outer cylinders, and the skirts 14 and 16 are formed at the sliding portion between the piston body 12 and the cylinder chamber 36. Both inner and outer skirt carts 16 and 17 are formed on the contact surface between the piston body 12 and the outer cylinder 7.
6, 17 and the inner surface 10 of the outer cylinder form the intake valve 23 of the container, and as the piston body 12 advances and retreats by operating the trigger 3, air is supplied to the container, resulting in a decrease in pump efficiency due to the generation of negative pressure inside the container. In addition, even if the discharged liquid leaks between the skirt carts 16 and 17, it is preferentially absorbed into the container, so there is no unnecessary leakage of the discharged liquid, and the discharger is attached to the liquid container. Even if it is stored or left unattended for a long period of time, there is no leakage of liquid, it is extremely easy to attach to various liquid containers, it is handy, and it is suitable for discharging various liquids.

Effects of the invention The present invention has the above-mentioned configuration, the cylinder of the pump is double-cylindered inside and outside, the inside of the inner cylinder is a spring chamber, the spring chamber is constantly supplied with air, and the trigger-type liquid discharger is activated. Regardless of the orientation of the installed liquid container, the spring is never immersed in the discharged liquid, there is no fear of rust or elution of the spring, and there are no problems caused by the spring, and the annular cylinder and piston Since a skirt is formed on the sliding part with the body, there is no need to provide a separate seal, and since an intake valve is formed, atmospheric air is supplied to the container as the piston body advances and retreats by operating the trigger. There is no reduction in pump efficiency due to the generation of negative pressure inside the pump, and there is no unnecessary leakage of the discharged liquid, and even if the liquid container is stored for a long time or left with the discharger attached, there will be no leakage of liquid. However, it is extremely easy and handy to attach to and remove from various liquid containers, and has various effects such as being suitable for discharging various liquids.

[Brief explanation of the drawing]

1 is a plan view of the embodiment, FIG. 2 is a vertical sectional view taken along the line -- in FIG. 1, FIG. 3 is an elevational view on the discharge side of the same, and FIG. 4 is an elevational view of the head of the piston body. 1...Discharge port, 3...Trigger, 4...Pump,
5... Container attachment part, 6... Main body, 7... Outer cylinder, 8
... Inner cylinder, 9 ... Cylinder, 10 ... Inner surface of outer cylinder, 11 ... Outer surface of inner cylinder, 12 ... Piston body,
13... Inner sliding surface, 14... Inner skirt, 15...
...Outer sliding surface, 16...Inner outer skirt, 17...
Outer outer skirt, 18...Inner cavity, 19...Spring chamber, 20...Spring, 22...Air hole,
23...Intake valve, 49...Annular piston.

Claims (1)

[Scope of utility model registration request] The main body is provided with a pump that is actuated by a trigger and has a liquid discharge port, and is provided with a container attachment part, and the pump that is actuated by the trigger is provided with a concentric outer cylinder and an inner cylinder protruding from the front of the main body. The piston body includes an annular cylinder consisting of an inner and outer double cylinder, and an annular piston that is fitted into the annular cylinder and slid on the inner surface of the outer cylinder and the outer surface of the inner cylinder. Skirts are formed on the edges of the outer cylinder and the inner cylinder that slide on the sliding surfaces, respectively, and are expanded toward the sliding surfaces. In a trigger-type liquid ejector in which a spring that urges the piston body outward from the axis is built into a spring chamber formed by a cavity, the spring chamber is always open only to the atmosphere, and the piston body is A trigger-type liquid discharger characterized in that an intake valve that communicates between the container opening and the atmosphere each time the container is operated is formed between the outer cylinder and a sliding surface of an annular piston that is in contact with the inner surface of the outer cylinder. .