JP2007296493A - Trigger type foam dispenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trigger type foam dispenser capable of directly supplying to a part where foam is to be applied by separating the foam dispenser from a foaming liquid tank. <P>SOLUTION: The trigger type foam dispenser has a mixing chamber 4 comprising an air flow-in port 6, a foaming liquid flow-in port 5 and a foam discharging filter 7, a foaming liquid storage chamber 10 having a suction port 11, a piston 22 interlocking with a trigger 2, a cylinder 23, a piston chamber 25 communicating with the forming liquid storage chamber 10 through a communicating port 24, a piston pump 30 having a return spring 26, an air pump 15 provided with a pump chamber 19, a suction port 20 and an air discharge port 16, check valves 9, 12, 14, 21 provided in each of the forming liquid flow-in port 5, the suction port 11, the air flow-in port 6 and an air intake port 20 and a flexible hose 13 connected to the suction port 11 to communicate and extended to the outside of a casing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a trigger-type foam dispenser for mixing foam liquid and air to discharge foam.

Conventionally, various foam dispensers have been proposed in which a foaming liquid such as a hair styling agent or a shampoo is mixed with air and discharged as a foam (see, for example, Patent Documents 1 and 2).
JP-A-8-299865 JP 2004-105902 A

  A conventional foam dispenser is integrally mounted with a foam liquid tank containing a foam liquid, and is used as a stationary type. Therefore, in use, the foam is discharged on the palm and applied to the required location.

  However, when the amount of foam required is larger than the amount that can be ejected from the foam dispenser at once, it is necessary to perform the operation of ejecting the foam onto the hand many times. Since this type of tank-integrated foam dispenser is designed as a stationary type, if it is lifted and tilted, or turned upside down, the foam liquid leaks out or foam cannot be discharged.

  Then, an object of this invention is to provide the trigger type | formula foam dispenser which can supply a foam dispenser separately from the liquid tank for foams, and can supply directly to the site | part which wants to supply foam.

  In order to achieve the above object, the trigger-type foam dispenser according to the present invention sucks up a foam liquid from a separate foam liquid tank through a flexible hose, and mixes and discharges the foam liquid and air into a foam. A foam-type liquid dispenser for communicating with a trigger, a casing that supports the trigger in a swingable manner, a piston that is linked to the trigger, and the flexible hose via a check valve And a piston pump having a foam liquid discharge port, in conjunction with the trigger, a pump chamber, an intake port for sucking in air from outside the pump chamber when sucking the foam liquid in the piston pump, and An air pump having an air discharge port for discharging air from the pump chamber at the time of discharging liquid for foam of the piston pump; and the liquid for foam Communicated with via a discharge port and the check valve, the communication through the air discharge port and the check valve, and characterized by having a mixing chamber with a foam discharge filter, the.

  According to the invention, the trigger type foam dispenser is connected by a flexible hose to a foam liquid tank that is spaced apart. When the trigger is operated, the piston pump and the air pump are interlocked. The piston pump sucks the foaming liquid in the tank from the foaming liquid suction port through the flexible hose, and at the same time, the air pump sucks the outside air. At this time, since the foam liquid discharge port and the air discharge port are closed by the check valve, the foam liquid suction and the outside air suction are effectively performed. The piston pump discharges the foam liquid from the foam liquid discharge port into the mixing chamber, and at the same time, the air pump discharges air into the mixing chamber. At this time, since the foam liquid suction port and the air inflow port are closed by the check valve, the foam liquid and the air are effectively pumped into the mixing chamber. In the mixing chamber, the foam liquid and air are mixed and discharged as foam by passing through the foam discharge filter.

  The best embodiment of the trigger type foam dispenser according to the present invention will be described below with reference to FIGS.

  In the trigger-type foam dispenser 1, a trigger 2 is swingably supported by a casing 3 shaped like a pistol.

  In the casing 3, a mixing chamber 4 for mixing the foam liquid and air is formed. The mixing chamber 4 includes a foam liquid inlet 5 through which the foam liquid flows, an air inlet 6 through which air flows, and a foam discharge filter 7 that discharges the mixture of foam liquid and air into foam. Yes. A nozzle 8 is connected to a downstream position of the foam discharge filter 7.

  The foam liquid inlet 5 of the mixing chamber 4 is provided with a check valve 9 that allows flow in the discharge direction and blocks flow in the reverse direction.

  The foam liquid inflow port 5 communicates with the foam liquid discharge port 10 a of the piston pump 30 via the check valve 9.

  The piston pump 30 includes a piston 22 that interlocks with the trigger 2, a cylinder 23 that houses the piston 22, a piston chamber 25 in the cylinder 23, a foam liquid reservoir chamber 10 that communicates with the piston chamber 25 through a communication port 24, and a communication port 24. A return spring 26 that urges the piston 22 in a direction in which fluid is sucked into the piston chamber 25, a foam liquid suction port 11 provided at the upstream end of the foam liquid reservoir chamber 10, and a foam liquid reservoir chamber 10 is provided with a foam liquid discharge port 10a provided at the downstream end.

  A flexible hose 13 is connected to the foam liquid suction port 11 via a check valve 12 that allows flow in the suction direction and blocks flow in the reverse direction. The flexible hose 13 extends outside the casing 3.

  In the illustrated example, the hemispherical protrusion 2 a of the trigger 2 is fitted in the spherical recess 22 b of the connecting rod 22 a of the piston 22.

  If the trigger 2 is pulled, the piston 22 is pushed and the piston chamber 25 contracts. If the trigger 2 is released, the piston 22 is pushed by the return spring 26 and the piston chamber 25 expands. When the piston chamber 25 expands, a suction force is applied to the foam liquid reservoir chamber 10 through the communication port 24. During this suction, the foam liquid inlet 5 is closed by the check valve 9, but the check valve 12 of the suction port 11 is opened by the suction force. As a result, the foam liquid can be sucked into the foam liquid reservoir 10 and the piston chamber 25 from the foam liquid tank 27 (see FIG. 1) through the flexible hose 13.

  The air inlet 6 of the mixing chamber 4 is connected by an air discharge port 16 of the air pump 15 and a hose 17 via a check valve 14 that allows the air to flow into the mixing chamber 4 and prevents the air from flowing out.

  The air pump 15 includes a pump chamber 19 constituted by a sac 18 formed of an elastic material, and the sac 18 is provided with an air discharge port 16 and an intake port 20. The intake port 20 is provided with a check valve 21 that allows intake and blocks exhaust. When the air pump 15 is compressed by pulling the trigger 2, the internal air is exhausted from the air discharge port 16, and when the trigger is released, the air pump 15 self-resets from the deformed state compressed by its retained elasticity to the original shape before compression. The air is sucked from the air inlet 20 at that time. During intake, the check valve 14 of the air inlet 6 is closed.

  In use, it is necessary to suck up the foam liquid from the foam liquid tank 27 into the foam liquid reservoir 10 by first pulling the trigger 2 several times. In a state where the foam liquid is not sucked up to the foam liquid reservoir 10, the foam is not discharged from the nozzle 8 even when the trigger 2 is pulled. However, if the foam liquid is sucked into the foam liquid reservoir 10 and the piston chamber 25 at one end, the foam is immediately discharged from the nozzle 8 by pulling the trigger 2 thereafter.

  Although the length of the flexible hose 13 is not specifically limited, For example, it is preferable to set it as 1-1.5m. If the length is too long, the suction load becomes large. If the length is too short, it does not reach the location where the foam should be supplied.

  The piston chamber 25 and the pump chamber 19 of the air pump 15 preferably have a maximum volume ratio of piston chamber: pump chamber = 1: 8 to 12 for foam formation.

  The foam discharge filter 7 is preferably provided with a mesh filter in order to promote the generation of foam. The mesh filter is preferably about 100 to 300 mesh. In order to adjust the foam particles, the mesh filter is preferably one or two stages.

  In the trigger type foam dispenser 1 having the above configuration, by pulling the trigger 2, the piston 22 and the air pump 15 are simultaneously pressed, the piston chamber 25 is compressed, and the air pump 15 is compressed from its original shape. As a result, the foaming liquid sucked and stored in the piston chamber 25 is discharged into the mixing chamber 4 through the foaming liquid reservoir chamber 10 through the communication port 24, and at the same time, the air sucked into the pump chamber 19 is air. It is discharged into the mixing chamber 4 through the inflow port 6, mixed in the mixing chamber 4, and discharged as foam from the foam discharge filter 7. Therefore, the discharge air pressure from the air pump 15 is added to the pressure by the piston 22 and the foam is discharged from the foam discharge filter 5.

  When the trigger 2 is released, the trigger spring 2 is pushed by the return spring 26 to return to the original position, and the return spring 26 pushes the piston 22, whereby the foam liquid is passed through the flexible hose 13 as described above. Intake into the reservoir 10 and the piston chamber 25. The sac 18 of the air pump 15 is self-recovered to its original shape by the retained elasticity, and sucks into the pump chamber 19 from the air inlet 20 at the time of self-recovery.

  In addition, the liquid for foam used what was manufactured so that it might become foam easily by mixing with air.

  The trigger-type foam dispenser having the above-described configuration, due to the action of a check valve provided in each flow path, does not cause dripping or inability to discharge foam even if the casing 3 is directed in any direction during operation. It can be directly supplied freely to the part to which the foam is to be supplied.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to the said embodiment. Various modifications are possible within the scope of the technical scope of the present invention.

  For example, in the above-described embodiment, the example in which the piston pump includes the foam liquid reservoir 10 that communicates with the communication port 24 has been shown. However, the communication ports 24 are provided at two locations, and one communication port is provided as the foam liquid suction port. It is also possible to connect the other communication port to the foam liquid discharge port 10a and omit the foam liquid reservoir.

  In the above-described embodiment, the air pump is not limited to the above-described embodiment, and any air pump may be used as long as the pump chamber is inflated and sucked and the pump chamber is contracted and exhausted in conjunction with the operation of the trigger. Further, a diaphragm pump, a spring return type air pump, a spring return type piston pump, and the like can be applied.

  Further, as shown in FIG. 3, the trigger 2 is provided with a ring 2b through which a finger other than the thumb is passed, a ring 2c through which the thumb is passed through the handle portion of the casing, a projection 2a ', and a connecting rod 22a' of the piston 22. The trigger 2 can be pulled back by finger force by connecting the two through a pin 40 or the like, and the suction force of the foam liquid may be increased manually. In this case, the return spring may be used as an auxiliary or may be omitted.

It is sectional drawing which shows embodiment of the trigger type | mold foam dispenser which concerns on this invention. It is a side view which shows the use condition of the trigger type foam dispenser of FIG. It is sectional drawing which shows other embodiment of the trigger type foam dispenser which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trigger type foam dispenser 2 Trigger 3 Casing 4 Mixing chamber 5 Foam liquid inlet 6 Air inlet 7 Foam discharge filter 8 Nozzle 9, 12, 14, 21 Check valve 11 Foam liquid suction port 10 Foam liquid reservoir Chamber 10a Foam liquid discharge port 13 Flexible hose 15 Air pump 16 Air discharge port 18 Sac 19 Pump chamber 20 Air intake port 22 Piston 23 Cylinder 24 Communication port 25 Piston chamber 26 Return spring 30 Piston pump

Claims (1)

A trigger-type foam dispenser for sucking up foam liquid from a foam liquid tank arranged at a distance through a flexible hose and mixing and discharging the foam liquid and air into a foam;
Triggers,
A casing for swingably supporting the trigger;
A piston pump having a piston linked to the trigger, a foam liquid suction port communicating with the flexible hose via a check valve, and a foam liquid discharge port;
In conjunction with the trigger, the pump chamber, an intake port for sucking in air from the outside of the pump chamber through the check valve when sucking the foam liquid in the piston pump, and air from the pump chamber at the time of discharging the foam liquid in the piston pump An air pump having an air discharge port for discharging;
A mixing chamber that communicates with the foam liquid discharge port via a check valve, communicates with the air discharge port and a check valve, and includes a foam discharge filter;
A trigger type foam dispenser characterized by comprising:

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