JP2000229255A - Trigger type liquid spray nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent spray nonuniformity or liquid drip, to simplify the structure and to reduce the number of parts by providing a structure for returning a liquid in a cylinder to a vessel body and removing residual pressure in a spray body in a piston to return the residual pressure in the liquid passage to the vessel body at the time of finishing spraying. SOLUTION: The piston 6 slides in the cylinder 5 to deep surface side against the elasticity of a spring 23 in a pump 7 when a tripper 8 is drawn to the center side of the spray body 4. At the time of increasing the pressure in a space A in the pump with the advance of the piston 6, a flow out passage 13 is opened with the slide of a discharge valve 19 and the pressurized gas in the space A in the pump is discharged to the outside through a flow out passage 13, the discharge valve 19 and a spray nozzle 20. A pressure release pin 24 provided in the piston 6 is passed through a communicating hole 25 and pushes a valve pole 17 in a flow in passage 12 to open a suction valve. Then, the air in the space A in the pump flows into the vessel body 2 through the flow in passage 12 and a tube 9 to reduce the pressure of the space A in the pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for spraying liquid contents.

[0002]

2. Description of the Related Art Conventionally, as a container for detergents for houses, glue for clothing, detergents for kitchens, etc., there has been known a liquid spray container having a trigger type spray attached to an opening of a container body. And, in this trigger type spray, pulling the trigger and pushing the piston into the cylinder discharges the air in the cylinder to the outside, and when the trigger is returned, the liquid is passed through a tube with one end immersed in the liquid. When sucking up and filling the cylinder with liquid, pulling the trigger again and pushing the piston pushes the liquid in the cylinder, guides it to the inflow path, guides it to the spray nozzle through the outflow path, and sprays the liquid. . In this type, liquid will remain in the cylinder, inflow path, and outflow path when the trigger is pulled, and this remaining liquid may drip from the spray nozzle. There were problems such as soiling and soiling around the container during storage. In addition, when the pressure of the liquid in the cylinder is low in the early stage and the late stage of the spray, the spray form does not become a mist but becomes a water droplet, and there is a disadvantage that uneven spraying occurs.

In order to solve these problems, various measures have been taken such as providing a lid at the tip of the spray nozzle or providing a discharge valve in the outflow passage. However, even with these contrivances, sufficient effects have not been achieved with respect to the unevenness of spraying, particularly, the unevenness of spraying in the later stage of spraying. Recently, Japanese Patent Application Laid-Open No. 8-309241, WO96 / 133
As seen in No. 34 and the like, measures such as providing a liquid passage for removing the residual pressure in the cylinder are taken. However, when this liquid passage is provided, the structure of the spray container becomes complicated, and the number of parts constituting the spray container increases, and
The shape of the spray container is also complicated, which causes problems such as a complicated assembly process.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention prevents uneven spraying and dripping by returning the residual pressure in the liquid passage at the end of spraying to the inside of the container body. It is an object to provide a spray container having a relatively simple structure and a small number of parts.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a trigger type liquid spray container according to the present invention is provided with an outflow passage and an inflow passage communicating with each other. A piston for supplying liquid to the passage, a spray body in which a cylinder is disposed, a trigger rotatably mounted on the spray body to move the piston, and a discharge valve mounted on a front portion of the outflow passage, A spray nozzle mounted in front of the discharge valve, a suction valve mounted in the inflow passage, a tube for introducing liquid from the container body to the spray body, and a hole for introducing outside air into the container body. A trigger type spray having a liquid spray container attached to an opening of a container body to be filled with liquid, returns the liquid in the cylinder into the container body, and removes residual pressure in the spray body. It is characterized in that it has a structure to the piston. In the present invention, the piston has a protrusion at an end thereof, and the suction valve is opened and closed by the protrusion to return the liquid in the cylinder into the container body and remove the residual pressure in the spray body. Is what you can do.

[0006]

The spray container of the present invention is constructed as described above, and can operate the trigger to spray the liquid uniformly. In addition, since the discharge valve is provided, spraying can be performed only when the liquid in the trigger main body has a certain pressure or higher, so that the spray form is uniform, and a water block when the pressure is reduced. No spraying occurs. Further, by providing a mechanism for returning the liquid in the cylinder into the container main body and removing the residual pressure in the spray main body, the pressure of the liquid in the trigger main body can be reduced immediately after discharging, and the discharge valve Can be intentionally adjusted and the closure can be completely completed, so that dripping from the spray nozzle after spraying can be prevented. Further, the spray container of the present invention is configured as described above, so that the number of parts is reduced as compared with a conventional container. This facilitates assembly of the spray container and reduces manufacturing costs.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings, but the present invention is not limited to the embodiments. FIG. 1 shows an embodiment of a trigger type liquid spray container 1 according to the present invention. In the trigger type liquid spray container 1 according to the present invention, a trigger type spray 3 can be attached to and detached from an opening of a container body 2 containing a liquid. The trigger type spray 3 comprises a spray body 4 and
A main member includes a pump 7 constituted by slidably disposing a piston 6 inside a cylinder 5 provided in the spray main body 4 and a trigger 8 pivotally attached to the spray main body 4 and having a lower part suspended therefrom. And And the container body 2
Has an external screw 2a on the outer surface of the mouth, and the external screw 2a
The inner screw 4 on the inner surface of the screwing cylinder 4a at the lower part of the spray body 4
By screwing b, the spray main body 4 is attached to the container main body 2.

[0008] In the screwing cylinder 4a of the spray body 4,
It is formed in a substantially conical shape so that a tube 9 described later is held and a liquid does not easily reach an outside air introduction hole 10 described later when the container is turned over, and the container body 2 and the spray body 4 are screwed together. There is provided a packing member 11 formed so as to maintain airtightness. The packing member 11 supports the tube 9 so that the other end thereof is located at the deepest part of the container. The spray body 4 has an inflow passage 12 into which the upper end of the tube 9 is inserted and an outflow passage 13 connected to the inflow passage 12.
And a hand positioner 14 having a shape protruding outward. A pump housing 15 extending to the top of the screw cylinder 4a is provided inside the inflow passage 12.
Is inserted into a portion of the pump housing 15 which is located in the inflow path 12.
A tube 9 for inflow into the tube is fitted to support the tube 9. Further, the pump housing 15 includes:
An outside air communication hole 16 for introducing outside air into the container body 2 through the cylinder 5 and the outside air introduction hole 10 through the outside air introduction hole 10 penetrating the wall of the cylinder 5 is provided.

As shown in the figure, a suction valve 18 which can be opened and closed by a valve ball 17 is formed at the top of the pump housing 15 at the top of the inflow passage 12 of the spray body 4. Further, the inflow path 12
At the top, the inside of the cylinder 5 and the outflow passage 13 communicate with each other. A discharge valve 19 and a spray nozzle 20 are provided at the other end of the outflow passage 13, and the outflow passage 13 is closed by the discharge valve 19, and the outflow passage 1 is closed.
3 is configured to be opened and closed by the hydraulic pressure in the apparatus. The spray nozzle 20 is fitted to the spray main body 4, and the fitting supports the discharge valve 19. In the figure, reference numeral 21 denotes a spray hole located at the center of the spray nozzle 20.

The cylinder 5 communicating with the top of the inflow passage 12 has a cylindrical shape, and the outside air introduction hole 10 is provided at the bottom of the cylinder 5 on the back side thereof, so that the inflow passage 12 is formed.
This space and the inner space of the pump 7 communicate with each other through the outside air communication hole 16. At the center of the back surface, a guide cylinder 22 is provided extending in the longitudinal direction of the center axis of the cylinder 5, and the piston 6 slides on the inner peripheral wall surface of the cylinder 5 and the outer peripheral wall surface of the guide cylinder 22. In this state, the cylinder 5 can be moved in the longitudinal direction of the central axis of the cylinder 5. One end of a spring 23 for urging the piston 6 outward is inserted and supported inside the guide cylinder 22. Further, the outer end 6a of the piston 6 slidably moving in the cylinder 5 is brought into contact with the power point portion 8a of the trigger 8. The airtightness is maintained between the sliding surfaces of the piston 6 and the cylinder 5 so that the liquid does not leak. Thereby, the piston 6 slides in the direction of compressing the liquid in the cylinder 5 by pulling the trigger 8, and when the trigger 8 is released, the piston 6 is returned from the guide cylinder 22 to the original position by the spring 23 in the pump 7. Slide.

As shown in the figure, at the inner end 6b of the piston 6, a pressure release pin 24 formed of a rod-like projection is provided at a position corresponding to the valve ball 17 of the suction valve 18. This pressure release pin 24
When the piston 6 reaches the inner surface of the cylinder 5,
A communication hole 25 which is opened at the inner surface 5a of the cylinder 5 and at a position corresponding to the top side of the inflow path 12.
The communication hole 25 is opened in such a size that a gap is formed between the communication hole 25 and the pressure release pin 24 so that the liquid can flow therein. Further, when the pressure release pin 25 itself enters the communication hole 2, its tip comes into contact with the valve ball 17, pushes the valve ball 17 toward the wall surface on the opposite side of the inflow path 12, and opens the suction valve 18. The length is set so that the inside of the pump 7 and the inside of the container body 2 communicate with each other. Further, the inside of the cylinder 5 and the inside of the container body are provided so as to be able to communicate with each other through the outside air introduction hole 10 opened in a part of the wall of the cylinder 5 and the outside air communication hole 16 provided in the pump housing 15. Therefore, when the outer peripheral sliding contact portion 6c of the piston 6 located at the position covering the outside air introduction hole 10 moves to the back side of the cylinder 5 to open the outside air introduction hole 10, the outside air is released. It is provided so that it can be introduced inside. That is, when the piston 6 reaches the innermost portion 5a, the inside of the container body 2 communicates with the outside through the cylinder 5 when the piston 6 reaches the innermost portion 5a (the outer air introduction hole 1
0 is not covered), otherwise the piston 6
Thereby, the inside of the container body 2 is set to a position where the inside of the container body 2 is shut off from the outside. The state shown in FIG. 1 is a state in which the piston 6 has advanced most outwardly. Even at this time, the outside air introduction hole 10 is covered with the outer peripheral sliding contact portion 6c of the piston 6, and the outside air introduction hole 10 Air and liquid are prevented from flowing.

In the above configuration, when spraying a liquid, first, the spraying liquid is stored in the container body 2 in advance, and the liquid is sprayed into the pump interior space (the space surrounded by the cylinder 5 and the piston 6) A. An operation of pulling the trigger 8 toward the center of the spray main body 4 in a state where no liquid is contained is performed. At the time when the trigger 8 is pulled, the piston 6 in contact with the trigger 8 is moved by the spring 23 in the pump 7.
Against the elasticity of the cylinder 5 and slides in the cylinder 5 toward the back side. At this time, at the suction valve 18 located at the top of the inflow passage 12, the valve ball 17 and the pump housing 15 are in close contact, and the suction valve 18 is in a closed state. Further, the discharge valve 19 in the outflow path 13 closes the outflow path 13 by a spring effect.
The outside air introduction hole 10 is also closed. Therefore, the pump internal space A is in a pressurized state. Further, the piston 6 slides and advances to the back side, and the pressure of the inner space A is increased by the discharge valve 19.
When the elastic force becomes higher than the elastic force of the discharge valve 19, the discharge valve 19 slides in the spray direction, and the outflow passage 13 closed by the discharge valve 19 is released. Therefore, the pressurized gas in the pump internal space is discharged to the outside air through the outflow passage 13, the discharge valve 19, and the spray nozzle 20. This release state of the discharge valve 19 continues until the pressure in the pump internal space A becomes lower than the elastic force of the discharge valve 19. Further, when the piston 6 reaches a sliding limit reaching the inner surface of the cylinder 5, the pressure release pin 24 provided on the piston 6 passes through the communication hole 25 and comes into contact with the valve ball 17 at the top of the inflow passage 12. Press this. When the valve ball 17 is displaced toward the wall surface opposite to the depressurizing pin 24, the suction valve 18 that has been closed is released, and the air in the pump internal space A flows into the inflow passage 1.
2. It flows into the container body 2 through the tube 9, and the pressure in the pump internal space A further decreases. When the pressure in the pump internal space A becomes lower than the elastic force of the discharge valve 19, the discharge valve 19
Is closed and the outflow passage 13 is closed.

Next, when the trigger 8 is released, the piston 6 slides outward in the cylinder 5 by the spring 23. At the same time, the pressure release pin 24 provided at the end of the piston 6 separates from the valve ball 17 and passes through the communication hole 25. When the restraint by the pressure release pin 24 is released, the valve ball 17 returns to the initial position, and the suction valve 18 is closed. At this time, the inside space A of the pump is shut off from the inside of the container body 2 and also shut off from the outside air. Further, when the piston 6 slides outward, the pump internal space A is in a negative pressure state. Then
The suction valve 18 is released, and the liquid in the container body 2 flows into the pump internal space A through the tube 9 and the inflow path 12. Then, until the piston 6 reaches the sliding limit,
The liquid flows into the pump interior space A. In this way, the pulling and returning of the trigger 8 is repeated, and the inner space of the pump, the inflow path 1
2. Fill the outflow passage 13 with liquid. In this state, both the suction valve 18 and the discharge valve 19 are closed. Next, when the trigger 8 is pulled toward the center side of the spray main body 4, the pump internal space A becomes a high pressure state, and when the pressure becomes higher than the elastic force of the discharge valve 19, the discharge valve 19 is released. Then, the liquid is atomized by the spray nozzle 20 through the discharge valve 19 and is ejected. When the piston 6 reaches the sliding limit on the back side, the pressure release pin 24 pushes the valve ball 17, the suction valve 18 is released, and the liquid in the pump internal space A passes through the suction valve 18, the tube 9 and the container. It flows into the main body 2. At this time, when the pressure in the pump internal space decreases and falls below the elastic force of the discharge valve 19, the discharge valve 19 closes, and the spraying ends. For this reason, spraying is performed when the pressure in the pump internal space A is equal to or higher than a certain value, and the form of spraying becomes uniform. Also, dripping after the end of spraying can be prevented.

When the piston 6 reaches the sliding limit on the inner side, the outside air introduction hole 1 provided in the wall of the cylinder 5 is opened.
0 is released, the outside communicates with the inside of the container body 2 through the outside air introduction hole 10, and outside air is introduced into the depressurized inside of the container body 2. Thereby, the deformation of the container body 2 due to the reduced pressure is prevented. Thereafter, when the trigger 8 is released, the piston 6 slides outward in the cylinder 5 by the restoring force of the spring 23. At this time, the outside air introduction hole 10 is covered by the piston 6, the inside of the container body 2 is shut off from the outside, and the suction valve 18 is closed. Further, when the piston 6 slides, the internal space of the pump is in a negative pressure state, and the suction valve 18 is released, so that the liquid in the container body 2 is discharged from the tube 9 and the inflow path 1.
2 and flows into the pump interior space A. When the piston 6 reaches the outermost sliding limit, the inside of the spray main body 4 is filled with the liquid again.

[0015]

The present invention is constructed as described above, and can form a suitable structure as a container for spraying liquid contents, and can form a uniform spray form. In addition, there is no pressure drop during spraying, so that dripping or leakage can be prevented, the surroundings are not stained, and the liquid content can be prevented from adhering to the user's hands. Furthermore, since the pressure reduction of the container body can be prevented, the deformation of the container can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic view of one embodiment of a trigger type liquid spray container of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Trigger type liquid spray container 2 ... Container main body 4 ... Spray main body 5 ... Cylinder 6 ... Piston 7 ... Pump 8 ... Trigger 9 ... Tube 10 ... Outside air introduction hole 12 ... Inflow path 13 ... Outflow path 15 ... Pump housing 16 ... Outside air Communication hole 17: Valve ball 18: Suction valve 19: Discharge valve 20: Spray nozzle 24: Pressure release pin A: Pump space

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuyuki Ohno 1-5-1, Taito, Taito-ku, Tokyo Inside Toppan Printing Co., Ltd. (72) Tatsuyuki Matsuoka 1-1-5-1, Taito, Taito-ku, Tokyo F Term in Toppan Printing Co., Ltd. (reference) 3E014 PA01 PB01 PB09 PD13 PE14 PE18 PF01 PF10

Claims (2)

[Claims] An outflow passage and an inflow passage communicating with each other are provided inside, and a spray main body in which a piston and a cylinder for supplying a liquid to both the flow passages are arranged, and the spray main body is rotatably mounted on the spray main body. A trigger for moving the piston, a discharge valve mounted on a front part of the outflow path, a spray nozzle mounted on a front part of the discharge valve, a suction valve mounted on the inflow path, and a container body. In a liquid spray container, a trigger type spray having a tube for introducing a liquid into the spray main body and a hole for introducing outside air into the container main body is attached to an opening of the container main body for filling the liquid, A trigger type liquid spray container characterized in that a piston has a mechanism for returning the liquid inside the container body and removing residual pressure in the spray body. 2. A structure in which a projection is provided at an end of the piston, and the liquid in the cylinder is returned into the container body by opening and closing the suction valve by the projection to remove residual pressure in the spray body. The trigger type liquid spray container according to claim 1, wherein: