JPH04102666U - foam squirt - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a foam ejector that can always maintain a constant amount of air mixed with a liquid and does not require a head space on the container side. [Structure] A piston 36 that reciprocates up and down is inserted into the tank 6 attached to the opening 4 of the container 1, and an air chamber 35 is formed inside the tank 6.
An intake port 38 is provided to communicate with the.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea eliminates the need to use propellant gas such as fluorocarbon gas or LPG to cleanse the liquid (face wash) in the container. A foam blower used to mix foam with air and take out foam. Concerning vessels.

0002

[Conventional technology]

FIG. 7 shows a conventional foam ejector 100 of this type. At the opening of the container 101 A fixing part 104 consisting of a cap 102 and a cylinder 103 is attached. Fixed part A press rod 106 having a piston 105 is inserted into 104 to open a piston chamber 107. It has been formed. A suction pipe 108 is provided at the lower part of the fixed part 104, and the check valve 1 09, a suction chamber 110 is formed.

0003 On the other hand, a pouring passage 111 having a check valve 112 is provided in the press rod 106. The spout passage 111 communicates with the outside air via the spout 114 of the nozzle 113. In addition , 115 are springs. Furthermore, the suction pipe 108 includes a suction path 116 and a container. A vent hole 11 that communicates with a head space 118 in which no liquid 117 exists in the 100 9 is provided.

0004 In the conventional example configured in this way, the spring 115 is pressed against the When the pressure on the press rod 106 is released, the press rod 106 releases the spring 115. is pushed up by the elastic force of Then, the piston chamber 107 becomes negative pressure and reverses. The stop valve 109 opens and the liquid 117 is sucked into the suction pipe 108 and The air in the head space 118 passes through the ventilation hole 119 and reaches the suction path 116, and the liquid 1 17. This mixed state temporarily remains in the piston chamber 107.

[0005] Next, when the press rod 106 is pressed, since the check valve 109 is closed, the piston chamber is closed. The increase in pressure inside 107 opens the check valve 112, and the gas-liquid mixture flows through the spout 114. It will be poured out in a foamy state. Note that during this pouring, the liquid 117 and air 118 is sucked into the cylinder chamber 107 in the same manner as described above, and is prepared for the next pouring. Ru.

[0006]

[Problem that the idea aims to solve]

However, in the above conventional example, the air in the head space 118 and the liquid 1 Since the liquid 117 is mixed with liquid 117 to form a foam, the liquid 117 can be continuously poured out. The amount of air gradually decreases over time. As a result, the mixture of air and liquid 117 There was a problem in that the ratio fluctuated, making it impossible to generate bubbles in an optimal state. In addition, since it is necessary to provide the head space 118, the amount of liquid 117 filled is reduced. There are some disadvantages as well.

[0007] This idea was developed to solve the above problem by constantly adjusting the amount of air mixed with the liquid. Foam ejector that can be maintained at a constant level and does not require head space on the side of the container. is intended to provide.

[0008]

[Means to solve the problem]

In order to achieve the above purpose, this invention consists of a hollow fixed The pusher is reciprocated in the axial direction and is biased toward the outside of the container by an elastic body. The pressure rod is arranged from the inside to the outside of the container, and the fixed part of the pressure rod is A suction chamber equipped with a check valve that only allows liquid to flow in is formed on the internal tip side, and is fixed. Inside the section, the pressure rod operates in the same direction as the pressure rod moves toward the inside of the container, and the elastic body An air chamber is formed within the fixed part by arranging a piston that is biased toward the outside so that it can reciprocate. At the same time, a dispensing passage leading to the outside of the container is provided at the axis of the press rod, and When the pressure rod moves a predetermined amount toward the inside of the container, the air chamber and the spouting path are communicated with each other. An air flow path and a liquid flow path communicating between the suction chamber and the dispensing path are provided, and the air flow path is closed. When the air flow path is open, the air chamber communicates with the atmosphere, and when the air flow path is open, the air chamber communicates with the atmosphere. An inlet is provided to close the outlet, and a membrane is provided in a part of the outlet path.

[0009]

[Effect]

The function of this device based on the above structure is that when no pressure is applied to the press rod, The push rod and piston are urged toward the outside of the container by the elastic force of the elastic body. At the same time, a certain amount of air flows into the air chamber through the intake port. Also, suction A predetermined amount of liquid is sucked into the room, and the air flow path and liquid flow path are closed. It is in. Furthermore, the check valve is also closed.

0010 Then, by applying pressure to the press rod, a predetermined amount is pushed inside the container against the elastic force of the elastic body. When activated, the intake port closes and the gas flow path and liquid flow path open. Apply more pressure to the pressure rod Then, the air whose pressure has increased due to the operation of the piston passes through the gas flow path to the outlet path. At the same time, the liquid in the suction chamber also flows into the dispensing channel through the liquid flow path. Ru. In this way, air and liquid are mixed in the spout, form a foam, and exit the spout. It is squirted.

[0011] Next, when the pressure on the pressure rod is released, the pressure rod is pushed to the outside of the container by the elastic body. The air intake port is opened and the gas flow path and liquid flow path are closed. , the piston is also urged by the elastic body and operates toward the outside of the container. For this reason, the atmosphere While the air inside flows into the air chamber through the intake port, negative pressure inside the suction chamber creates a reverse check. The valve is opened and the liquid in the container is sucked into the suction chamber.

0012 When the press rod and piston stop at the predetermined position, the air chamber and suction chamber are filled with the piston. A certain amount of air and liquid flows in corresponding to the stroke of the push rod. then again When the pressure rod is pressurized, the air in the air chamber and the liquid in the suction chamber are released in the same way as described above. The mixture is mixed in the spouting passage, becomes foamy, and is ejected from the spout.

[0013]

【Example】

Next, this invention will be explained based on FIGS. 1 to 6. Figures 1 to 5 show the present invention in liquid form. No. 1 used as a foam pump dispenser 2 for a container 1 containing facial cleanser. An example is shown. That is, 3 is a fixed part attached to the opening 4 of the container 1, and this fixed part 3 is a combo cap 5 screwed onto the opening 4, and a combo cap 5 formed inside the combo cap 5. It has a hollow tank 6. The tank 6 has its cylindrical portion 7 inside the combo cap 5. It is held between a cylinder 8 and an outer cylinder 9. An outward flange 7a provided on the cylindrical portion 7 A packing P is interposed between the opening 4 and the end face of the opening 4.

[0014] Further, at a position facing the bottom side of the tank 6, that is, the inside 10 side of the container 1, a downward A protrusion 11 is formed in a cylindrical shape toward the A suction pipe 12 is attached. Furthermore, a valve seat 14 and a ball are provided in the protrusion 11. A check valve 15 having a valve body 13 is provided.

[0015] On the other hand, the fixing part 5 includes a part from the outside 16 to the inside of the container 1, specifically, from the bottom of the tank 6. A press rod 17 that reaches the vicinity is arranged so as to be able to reciprocate in the axial direction, that is, in the vertical direction in the figure. be. This pressing rod 17 is located on the outside 16 side and is stored inside the combo cap 5. a tubular shaft 19 having an outwardly facing flange 18 and a stem 20; There is a predetermined gap between the stem 18 and the combo cap 5, and the combo cap The air suction chamber 42 in the cup 5 and the outside 16 communicate with each other. The upper part of the stem 20 is It is fitted into the shaft 19, while the lower part is fitted into the sleeve 21 provided at the bottom of the tank 6. It is stored so that it can be moved back and forth freely. The shaft 19 and the stem 20 are connected to each other. Two screen meshes (membrane bodies) 33 are placed at a predetermined distance in the spouting channel 32. , 34 are provided. A suction chamber 22 is formed within the protrusion 11 . This screen mesh can be used as a single sheet or as a porous material such as a porous body. good.

[0016] In addition, the outer peripheral surface of the distal end side of the stem 20 is provided with radial ribs to prevent the stem 20 from coming off. 23, and a ball presser 24 is provided on the distal end surface. Furthermore, A relief hole 2 is provided on the upper side of the protrusion 11 to communicate the interior 10 of the container 1 and the suction chamber 22. 5 is provided. Furthermore, an air flow path 43, A liquid flow path 44 is provided.

[0017] A nozzle 27 having a spout 26 is provided at the upper end of the shaft 19. So The upper part of the combo cap 5 is placed on the outer periphery of the sleeve 28 into which the shaft 19 is fitted. A male thread 31 is formed to be screwed into a female thread 30 of a sleeve 29 provided in the section.

[0018] A piston 3 is installed in the tank 6 so as to be able to reciprocate with respect to the outer periphery of the stem 20. 6 is stored therein, and an air chamber 35 is formed on the bottom side of the tank 6. This piste The sleeve 2 of the tank 6 includes an arm portion 39 that slides on the inner circumference of the body portion 41 of the tank 6 and a sleeve 2 of the tank 6. 1, the sleeve 40 is reciprocatably inserted into the inside of the sleeve 40. Also, the sleeve 40 is Two passages 45 are provided in the vicinity of the boss portion 37 in the radial direction. 7 is formed with three intake ports 38 that communicate the air intake chamber 42 and the air chamber 35. Ru.

[0019] Further, the body 41 of the tank 6 has a connection between the inside of the tank 6 and the inside 10 of the container 1. A passage 46 for pressure reduction correction is provided. On the other hand, between the bottom of the tank 6 and the piston 36 is equipped with a spring (elastic body) 47 that urges the piston 36 upward in the figure. It has been done. Further, there is a pressure between the piston 36 and the flange 18 of the shaft 19. A spring (elastic body) 48 is provided to urge the rod 17 toward the outside 16. vinegar The elastic force of the spring 48 is smaller than that of the spring 47.

[0020] Next, the operation of the above embodiment will be explained. First, container 1 is sold at stores etc. In this case, the pressure rod 17 with the male thread 31 screwed into the female thread 30 is at the lowest position. , the ball presser 24 is holding down the ball 24. Therefore, the user can rotate the nozzle 27. When the pressure rod 17 is loosened by the elastic force of the springs 47 and 48, the pressure rod 17 is moved as shown in FIG. rise to Here, when the press rod 17 is not pressurized, the press rod 17 and the pin The stone 36 is urged toward the outside 16 by the elastic force of the springs 48 and 47. Then, the flange 18 comes into contact with the upper wall 5a of the combo cap 5, and the press rod 17 is in the normal position. The arm 39 of the piston 36 comes into contact with the end surface of the inner cylinder 8 and stops at the top dead center. There is. Here, since the intake port 38 is in an open state, the air from the outside 10 flows into the shaft 19. and the combo cap 5, and the air chamber through the air suction chamber 42 and the air intake port 38. A certain amount is flowing into 35. In addition, a certain amount of liquid (not shown) is contained in the suction chamber 22. (facial cleanser, etc.) is being suctioned, and the check valve 15 is closed. Furthermore, the air flow path 43 , the liquid flow path 44 is closed, while the escape hole 25 is open.

[0021] Next, when pressure is applied to the pressure rod 17 from above, only the pressure rod 17 springs. The tip of the stem 20 moves the suction chamber 22 downward against the elastic force of the stem 20. The initial pressure increases and some of the liquid escapes through the relief hole 25 into the interior 10. and , the air flow path 43 and the liquid flow path 44 open as shown in FIG. The end surface comes into contact with the upper end surface of the boss portion 37 and the intake port 38 is closed.

[0022] Furthermore, when the press rod 17 is pressurized, the piston 36 is pressed by the flange 18. resisting the elastic force of the spring 47 and descending together with the press rod 17, and the air chamber 35 is pressurized, and the lower part of the stem 20 further increases the pressure inside the suction chamber 22. Melt. As a result, the liquid in the suction chamber 22 passes through the liquid passage 44 and enters the spout passage 32 under pressure. At the same time, the air in the air chamber 35 also passes through the passage 45 and the air flow passage 43 to the extraction passage 3. 2. In this way, air and liquid are mixed within the spout passage 32. At the same time, the screen mesh 34 rises as the piston 38 descends. , 33, it becomes fine foam and flows through the spout 26 to the outside 16. It will be gushed out. During the above action, when the lower end of the male thread 31 hits the upper end of the female thread 30 as shown in Figure 3. The piston 36 stops at the point (bottom dead center), and the air in the intake chamber 42 passes through the passage 46. It flows into the interior 10 side.

[0023] Next, when the pressure on the press rod 17 is released, first only the press rod 17 is pressed against the spring 4. 8 moves upward as shown in FIG. The body flow path 44 is closed, and the inside of the suction chamber 22 becomes negative pressure, causing the ball 13 to move. When it floats up, the check valve 15 opens and the liquid 10 inside the container 1 is sucked through the suction pipe 12. It begins to be sucked into the chamber 22.

[0024] Furthermore, the piston 36 also rises as shown in FIG. 5 due to the elastic force of the spring 47. Therefore, while the air from outside 10 is drawn into the air chamber 35 through the intake port 38, Aspiration of liquid into chamber 22 continues. Then, the elevated press rod 17 and the piston 36 returns to the normal position shown in FIG. 1 and stops.

[0025] In this way, in the present invention, a certain amount of air is pumped by raising the piston 36. Air can be drawn into the chamber 35. Therefore, the mixing ratio of air and liquid is always kept constant. The foam can be maintained in the most suitable condition and can be poured out. Also, air is in container 1 Since the intake is from the outside 10 of the container 1, there is no headspring in the inside 10 of the container 1 as in the conventional case. There is no need to provide a space and the liquid can be sufficiently filled. Furthermore, below the piston 36 At the time of descent (FIG. 3), the air in the air intake chamber 42 flows into the interior 10 through the passage 46. Therefore, even if the container 1 is compressed and liquid is continued to be poured out, depressurization inside the container 10 can be prevented, and the capacity can be maintained. Vessel 1 will not remain crushed. FIG. 6 shows a second embodiment of a foam pump dispenser 50. child In the embodiment shown in FIG. This embodiment differs from the first embodiment in that a ventilation hole 53 is provided. Other configurations are the same as the first embodiment. The same action and effect can be obtained.

[0026]

[Effect of the idea]

Since this idea is constructed as described above, the piston operates at a constant rate. A large amount of air can be drawn into the air chamber. Therefore, the mixing ratio of air and liquid can be maintained constant at all times, allowing the most suitable foam to be poured out. Also, empty Since the air is taken in from outside the container, there is no head spacer inside the container as in the conventional method. There is no need to provide a space, and the liquid can be sufficiently filled.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, with a press rod not pressurized.

FIG. 2 is a vertical cross-sectional view of the pressing rod shown in FIG. 1;

FIG. 3 is a longitudinal cross-sectional view of the pressing rod in FIG. 2 in a state where it is further pressed.

FIG. 4 is a vertical cross-sectional view from FIG. 3 in which only the pressure rod has risen and suction of liquid has started.

FIG. 5 is a vertical cross-sectional view of the state in which the press rod and piston are raised to suck air and liquid from FIG. 4;

FIG. 6 is a vertical cross-sectional view of the second embodiment.

FIG. 7 is a longitudinal sectional view showing a conventional foam ejector.

[Explanation of symbols]

1 container 2 Foam pump dispenser 3 (5, 6) Fixed part 4 Opening 10 Inside 15 Check valve 16 External 17 Pressure rod 22 Suction chamber 32 Pour route 33, 34 Screen mesh (membrane body) 38 Intake port 48, 47 Spring (elastic body) 43 Air flow path 44 Liquid flow path

Claims (1)

[Scope of utility model registration request] Claim 1: A pressing rod, which is reciprocatable in the axial direction and is urged toward the outside of the container by an elastic body, is attached to a hollow fixed part attached to the opening of the container from the inside to the outside of the container. At the same time, a suction chamber equipped with a check valve that only allows the inflow of liquid is formed in the fixed part on the inner tip side of the press rod. A piston that operates in the same direction and is urged outward by an elastic body is arranged reciprocatingly to form an air chamber within the fixed part, and the axis of the press rod is connected to the outside of the container. An air flow path that connects the air chamber and the spouting path, and a liquid flow path that connects the suction chamber and the spouting path when the press rod is operated a predetermined amount toward the inside of the container. An inlet is provided, which communicates the air chamber with the atmosphere when the air flow path is closed, and an intake port that closes the air chamber and the atmosphere when the air flow path is open. A foam ejector equipped with a membrane body.