JP7410816B2 - valve housing - Google Patents

Description

The present invention relates to a valve housing of a discharge member that is attached to a pressurized product whose container is filled with a stock solution and a pressurizing agent and sealed, and particularly relates to a valve housing with a filter function.

Patent Document 1 discloses a discharge device that includes a pressurized product whose container is filled with a stock solution and a pressurizing agent and sealed, and a discharge member that opens the pressurized product and discharges the stock solution. The pressurized product includes a closing portion that is opened by pressing from the outside so as to enter inside, and the discharge member includes an opening portion that presses the closing portion. When using the dispensing device, a dispensing member is attached to the pressurized product, and the closed portion is pressed to open the seal and the undiluted solution is discharged. The discharge member is equipped with a valve mechanism, and can switch between discharging and stopping the stock solution. Further, this valve mechanism is housed in a valve housing having an opening portion.

Patent Document 2 discloses a valve housing equipped with a filter for removing solid matter mixed into aerosol contents and preventing clogging of an aerosol device.

Japanese Patent Application Publication No. 2020-19570 Patent No. 3889842

By the way, in the pressurized product of Patent Document 1, when the closed portion is opened, it has been found that various sizes of fragments are generated due to the impact at the time of opening. Debris can become lodged in the valve mechanism, destabilizing the delivery of concentrate.

The valve housing of Patent Document 2 is equipped with a filter, but the diameter of the small flow holes that make up the flow path of the filter is as small as 0.1 to 0.3 mm, and foreign particles as large as several millimeters may cause many small flow holes at once. There is a risk that the hole may become blocked.

Therefore, the technical problem of the present invention is to provide a valve housing that can deal with fragments of various sizes that are generated when a pressurized product is opened.

The valve housing of the present invention includes an accommodating part 24a that accommodates the valve mechanism B, an unsealing part 27 that protrudes below the accommodating part 24a and is opened by pushing in the lid 15 of the pressurized product 11a, and an outer periphery of the unsealing part 27. A plurality of protective walls 30f provided in the protective wall 30f, a communication path 30e that opens between the protective walls 30f and communicates the inside of the pressurized product 11a and the inside of the housing part 24a, and a communication path 30e between the communication path 30e and the valve mechanism B. It is characterized in that it includes a filter section 31 provided therein.

In such a valve housing, it is preferable that the filter portion 31 is formed by a gap created between the members by combining the members.

In particular, it is divided into a main body member 29 having an accommodating part 24a and an unsealing member 30 having an unsealing part 27, the main body member 29 is provided with an insertion hole 29a that communicates with the accommodating part 24a, and the unsealing member 30 is It is preferable that an insertion portion 30a inserted into the insertion hole 29a is provided, and a filter portion 31 is formed by a gap created between the inner peripheral surface of the insertion hole 29a and the outer peripheral surface of the insertion portion 30a.

Moreover, it is preferable that the insertion direction of the insertion part 30a is parallel to the direction in which the lid 15 is opened by the opening part 27.

Alternatively, it is preferable that the filter member 32 is provided to be inserted into the accommodating part 24a, and the filter part 31 is formed by a gap created between the inner peripheral surface of the accommodating part 24a and the outer peripheral surface of the filter member 32. . Furthermore, it is preferable that the filter member 32 is fixed by the valve mechanism B.

In the valve housing of the present invention, the protective wall can prevent large fragments from entering the communication passage and blocking the filter portion or blocking the opening of the communication passage on the pressurized product side. Further, the filter portion can trap small debris, thereby suppressing debris from entering the valve mechanism.

In the above valve housing, if the filter part is formed by a gap created by combining the members, it can be formed with higher precision than when the filter part is formed by drilling holes in the members, and small pieces can be removed. can be captured reliably.

It is divided into a main body member having an accommodating portion and an unsealing member having an unsealing portion, the main body member being provided with an insertion hole that communicates with the accommodating portion, and the unsealing member being provided with an insertion portion that is inserted into the insertion hole. If the filter part is formed by the gap created by inserting the insertion part into the insertion hole, even if large resistance is applied to the opening member as the stock solution flows through the filter part, the direction of the force will be in the direction of the insertion hole. Since the insertion direction is the same as the insertion direction of the opening member into the insertion hole, the opening member does not come off from the main body member, and the filter function can be maintained.

When the insertion direction of the insertion section is parallel to the direction in which the lid is opened by the opening section, the opening member does not come off from the main body member due to opening of the lid, and the filter function can be maintained.

In addition, when a filter member is inserted into the accommodating part and the filter part is formed by a gap created by inserting the filter member into the accommodating part, when the filter part is formed by making a hole in the member. It can be formed with higher precision compared to other methods, and small fragments can be captured reliably.

When the filter member is fixed by a valve mechanism, even if large resistance is applied to the filter member as the stock solution flows through the filter part, the movement of the filter member can be suppressed and the filter function can be maintained. can.

FIG. 1A is a sectional view of a dispensing device equipped with a valve housing of the present invention, and FIG. 1B is a sectional view of a container body used in the dispensing device. FIG. 2A is a sectional view of a main part of the discharge member of FIG. 1A, and FIG. 2B is a sectional view of a main part of a pressurized product. 3A is a cross-sectional view of the main body member, FIG. 3B is a cross-sectional view of the unsealing member, FIG. 3C is a plan view of the unsealing member, FIG. 3D is a cross-sectional view of the valve housing, and FIG. 3E is an end view taken along the line II-II. FIG. 2 is a cross-sectional view of the main part showing a state in which the closing part of the valve housing is opened. FIG. 5A is a sectional view of the filter member, FIG. 5B is a sectional view of the main body member, FIG. 5C is a plan view of the filter member, and FIG. 5D is a bottom view of another valve housing of the present invention with the filter member inserted into the main body member. This is a diagram looking up from the top. FIG. 6 is a sectional view of a main part of a discharge member including the valve housing shown in FIG. 5. FIG.

A discharge device 10 shown in FIG. 1A includes a double pressurized container (container) 11, a discharge member 12, a stock solution (content) C and a pressurizing agent P filled in the double pressurized container 11. The valve housing 24 of the present invention is one component of the discharge member 12. A pressurized product 11a is a double pressurized container 11 filled with a stock solution C and a pressurizing agent P. The pressurized product 11a and the discharge member 12 are sold as an unassembled set (see FIG. 1A) or in a half-assembled, unopened state. The pressurized product 11a is not only sold together with the discharge member 12, but also sold alone as a replacement. Therefore, the pressurized product 11a is sealed so that the filled stock solution C and the pressurizing agent P do not leak out until the discharge member 12 is attached (until it is unsealed by the discharge member 12). The discharge member 12 may also be sold separately.

The double pressurized container 11 includes an outer container 13, a flexible inner container 14 housed inside the outer container 13, and a lid (sealing board) 15 that seals the outer container 13 and the inner container 14. Consisting of There are no valves or pumps. The combination of the outer container 13 and the inner container 14 is a container body 16 (see FIG. 1B). The inside of the inner container 14 is a stock solution storage chamber Sc filled with the stock solution C, and the space between the outer container 13 and the inner container 14 is a pressurizing agent storage chamber Sp filled with the pressurizing agent P. They are sealed by a lid 15. That is, this double pressurized container 11 separately stores the stock solution C and the propellant P, and enables only the stock solution C to be discharged, thereby preventing leakage of the pressurizing agent P such as compressed gas.

As shown in FIG. 1B, the outer container 13 includes a bottom portion 13a, a cylindrical body portion 13b, a shoulder portion 13c, and a cylindrical neck portion 13d. A male thread 13e is formed on the outer periphery of the neck portion 13d. The upper end surface 13f of the neck portion 13d is made substantially flat so that the lid 15 can be fixed thereto. In this embodiment, the bottom portion 13a of the outer container 13 includes a downwardly projecting annular ground surface 13a1 and an upwardly projecting dome portion 13a2 provided at the center thereof. This improves pressure resistance and impact resistance when dropped. Therefore, it is safe even when distributed individually or delivered by courier. Further, since it has the ground plane 13a1, it can be stably placed on a flat table or the like. However, the bottom surface may be spherical.

As shown in FIG. 2B, the upper end surface 13f of the neck 13d of the outer container 13 is made to be integrated with the lid 15 by increasing the contact pressure with the lid 15 during ultrasonic welding to facilitate melting. An annular projection 13g is formed to form a welded portion for the purpose. The annular protrusion may be provided on the lid 15 side, or may be provided on both sides. An annular support portion 13d1 is provided on the outer periphery of the neck portion 13d of the outer container 13 to suspend it during transportation or welding.

Returning to FIG. 1B, like the outer container 13, the inner container 14 also includes a bottom portion 14a, a body portion 14b, a shoulder portion 14c, and a neck portion 14d. The bottom 14a of the inner container 14 is also formed with a downwardly projecting annular recess 14a1 and an upwardly projecting dome 14a2 provided at the center thereof. This bottom portion 14a is in contact with the bottom portion 13a of the outer container 13, and is supported so that the inner container 14 does not fall down when filling the pressurizing agent or fixing the lid 15. As shown in FIG. 2B, the neck portion 14d includes a cylindrical upper portion 14d1, a tapered portion 14d2 that tapers downward from the upper portion 14d1, and a hanging portion 14d3 that extends downward from the lower end thereof. The lower end of the hanging portion 14d3 is continuous with the shoulder portion 14c. That is, the tapered part 14d2 of the neck part 14d of the inner container 14, the hanging part 14d3, and the upper part of the shoulder part 14c form a constricted part. Note that this constricted portion has a shape that is substantially in close contact with the outer circumferential surface of a sealing portion 15a of the lid 15, which will be described later. Therefore, when the internal container 14 is filled with the stock solution C, the gas phase portion (head space) becomes small. There is a slight gap between the outer surface of the upper portion 14d1 and the inner surface of the neck portion 13d of the outer container 13. The inner surface of the upper portion 14d1 is a smooth cylindrical surface.

The upper end surface 14e of the neck portion 14d of the inner container 14 protrudes from the upper end surface 13f of the outer container 13, and a flange 14f that engages with the upper end surface 13f of the outer container 13 is formed at the projecting portion. The thickness (radial dimension) of the flange 14f is about 1/3 to 1/2 of the thickness of the neck 13d of the outer container 13. Therefore, when the flange 14f is engaged with the upper end surface 13f of the neck portion 13d of the outer container 13, the outer portion of the upper end surface 13f of the neck portion 13d of the outer container 13 remains uncovered. The annular projection 13g at the upper end of the external container 13 is provided on the outer side thereof. An annular projection 14g is also formed on the upper end surface 14e of the neck 14d of the inner container 14 to increase the contact pressure with the lid 15 during ultrasonic welding and create a welded part with the lid 15. .

On the lower surface of the flange 14f of the inner container 14, radially extending lateral grooves 14h for filling the pressurizing agent are formed at four equal intervals. Further, a vertical groove 14i is formed on the outer circumferential surface of the neck 14d of the inner container 14 and communicates with the horizontal groove 14h. The vertical groove 14i is provided in the upper part 14d1, and makes it easy to fill the pressurizing agent P into the pressurizing agent storage chamber Sp.

Both the outer container 13 and the inner container 14 are made of thermoplastic resin such as polyethylene terephthalate, polyethylene naphthalate, polyethylene, and polypropylene. These can be manufactured by, for example, inserting a preform for the inner container into a preform for the outer container and simultaneously blow molding the lower ends of the necks 13d and 14d. Particularly preferred is an injection blow molding method in which a preform of a predetermined shape is injection molded and then blow molded. In addition, by pushing the bottom portion 13a upward when forming the dome portion 13a2, the annular recessed portion 14a1 of the inner container can be stretched to increase its strength, and the weight can be reduced.

The lid 15 includes a substantially cylindrical sealing portion 15a inserted into the neck portion 14d of the inner container 14, and an annular flange 15b continuous to the upper end of the sealing portion 15a. A fitting cylinder portion 15a1 is provided concentrically inside the sealing portion 15a. The fitting cylinder portion 15a1 rises upward from the center of the bottom of the sealing portion 15a and is open at the upper end. The upper part of the sealing part 15a has a substantially cylindrical shape, and the lower part 15a3 has a tapered shape that becomes thinner toward the bottom. However, it may be cylindrical from the top to the bottom.

In this lid body 15, a lower end 15a4 of the lower part 15a3 and a lower end of the lower cylinder part 15a5 extending downward from the fitting cylinder part 15a1 are connected by a connecting part 15a6. Further, a bottom portion 15c is provided so as to close somewhat above the lower end of the lower cylindrical portion 15a5. Therefore, when ultrasonic welding is performed by pressing the horn against the upper surface of the lid 15, the vibrations of the horn tend to flow through the sealing part 15a and flowing from the lower end 15a4 to the stock solution C side. Furthermore, since the closing portion 15d, which will be described later, is located above the connecting portion 15a6, vibrations are less likely to be transmitted to the closing portion 15d. Therefore, melting and penetration of the line of weakness 15f, which will be described later, is prevented.

The bottom portion 15c is provided with a closing portion (unsealed portion) 15d that includes a pressure receiving portion 15d1 that is thicker than the surrounding area. The closing portion 15d is normally circular in plan view. However, other shapes such as a rectangle can also be used. The closing portion 15d is surrounded by a thin-walled portion (broken portion, line of weakness) 15f that is easily broken, such as an annular groove. The pressure receiving portion 15d1 is provided on substantially the entire upper surface of the closing portion 15d, and the thin wall portion 15f is formed on the upper surface of the bottom portion 15c. Note that the thin portion 15f may be formed on the lower surface. The thin portion 15f is formed of, for example, a V-groove. The thin portion 15f is continuous so that it can be torn off when the closing portion 15d is opened, but may be discontinuous as long as it can be broken. In order to prevent the closing portion 15d from falling off or coming loose after opening, a reinforcing portion may be provided that extends in the radial direction across the line of weakness 15f.

The outer circumferential surface of the sealing part 15a is connected to the inner surface of the neck part 14d of the inner container 14, so that the air inside the inner container 14 can be exhausted when the lid body 15 is attached to the neck part 14d of the inner container, and , it is preferable that the fitting state is such that the stock solution C in the inner container 14 can be sealed. Furthermore, the inner circumferential surface of the fitting cylinder portion 15a1 has a tapered shape that reduces in diameter downward so that it comes into close contact with the sealing member 28 of the valve 21 when the closing portion 15d is unsealed to prevent the stock solution C from leaking. . However, it may be cylindrical.

The flange 15b of the lid 15 is attached to the upper end surface 13f of the neck 13d of the outer container 13 and the neck 14d of the inner container 14 by welding such as ultrasonic welding, laser welding, or high frequency welding after filling with the stock solution C and the pressurizing agent P. It is welded to the upper end surface 14e and sealed. In this embodiment, an annular projection 14g is formed on the upper end surface 14e of the inner container 14, and an annular projection 13g is also formed on the upper end surface 13f of the outer container 13, so that the sealing after welding is reliable. Further, it may be bonded for the purpose of increasing airtightness.

The reason why the bottom part 15c of the fitting cylinder part 15a1 is provided slightly above the lower end of the fitting cylinder part 15a1 is to increase the rigidity of the bottom part 15c and to make it easier to break the thin part 15f. Further, a reinforcing rib 15g is provided on the lower surface of the bottom portion 15c, specifically, so as to span the inner surface of the lower cylindrical portion 15a5 and the lower surface of the bottom portion 15c, thereby further increasing the rigidity of the bottom portion 15c and ensuring that the thin wall portion 15f does not break. It is also for the purpose of Note that the reinforcing ribs 15g are preferably provided at a plurality of locations at equal angles so as to surround the line of weakness 15f. The reason why the diameter of the fitting cylinder part 15a1 is made smaller than the diameter of the lower part 15a3 of the sealing part 15a is to improve the molding accuracy of the inner surface of the fitting cylinder part 15a1, and to surround it with the seal member 28 of the discharge member 12. This is to reduce the area receiving internal pressure and weaken the upward force applied to the lid 15. This is to ensure a space for accommodating the valve holding portion 18a that further projects downward. The connecting portion 15a6 at the lower end of the fitting cylindrical portion 15a1 may be cylindrical, but may be communicated with a lateral groove so that gas does not accumulate between the lower cylindrical portion 15a5 and the bottom portion 15c.

The flange 15b of the lid 15 includes an annular disk portion 17 that extends radially outward from the upper end of the sealing portion 15a, and an outer cylinder portion 17a that extends downward from the outer edge of the annular disk portion 17. The lower surface of the annular disk portion 17 is in contact with the upper end surface 14e of the neck portion 14d of the inner container 14 to form a welded portion and is sealed, and the lower surface of the outer cylinder portion 17a is the upper end surface 13f of the neck portion 13d of the outer container 13. This is the part that contacts and forms a weld and seals.

The material of the lid 15 is a thermoplastic resin that has high thermal bonding properties with the outer container 13 and the inner container 14, and it is preferable to use the same material as the outer container 13 and the inner container 14 in order to increase the welding strength. As shown in FIG. 1A, the lid 15 seals the stock solution storage chamber Sc and the pressurizing agent storage chamber Sp, and is fixed to either the inner container 14 or the outer container 13, or both, so that the contents ( Stock solution C and pressurizing agent P) can be stored safely for a long period of time without leaking. The thin wall portion 15f has a shape that has a sufficient sealing function when unopened and can be easily broken.

Undiluted solution C includes skin products and treatment agents such as facial cleansers, detergents, bath additives, moisturizers, cleansing agents, sunscreens, lotions, shaving agents, depilatory agents, antiperspirants, sterilizing agents, pest repellents, etc. , human products such as hair products such as styling products and hair dyes, foods such as whipped cream and olive oil, deodorants, air fresheners, insecticides, insect repellents, pollen removers, sterilizing disinfectants, cleaning agents, etc. These include household goods and industrial goods such as lubricants. However, it is not limited to these uses.

The pressurizing agent P is preferably a compressed gas such as nitrogen gas, compressed air, or carbon dioxide gas. It is preferable that the pressure in the double pressurized container 11 is set to 0.1 to 1.0 MPa (25° C., gauge pressure), particularly 0.3 to 0.8 MPa (25° C., gauge pressure) using a pressurizing agent. Further, the capacity of the external container 13 is preferably 30 to 500 ml. The capacity of the internal container (undiluted solution storage chamber Sc) 14 is preferably about 20 to 300 ml. The capacity of the pressurizing agent storage chamber Sp is preferably about 10 to 200 ml.

As described above, the double pressurized container 11 has a small number of parts and has no operating parts such as valves, so it can be manufactured at low cost. and safe when carried by consumers and delivered by distributors. Furthermore, even if the outer container 13 were to crack, only the pressurizing agent P would leak, but the stock solution C in the inner container 14 would not leak. Therefore, it is even safer.

Further, in this pressurized product 11a, the outer container 13 and the inner container 14 are made of synthetic resin, and the inner container 14 is surrounded by the pressurizing agent P and further surrounded by the outer container 13, so that the pressurized product 11a is It has high elasticity and does not break easily even if dropped. Furthermore, since the closing portion 15d is located inside, there is less risk of the closing portion 15d being accidentally broken, making it even safer.

As shown in FIG. 1A, the discharge member 12 includes a cap (installation part) 20 that is screwed into the external thread 13e of the neck 13d of the external container 13, a valve 21 covered by the cap 20, and a stem 22 of the valve 21. It consists of an operation button 23 equipped with a discharge nozzle, which is attached to the machine.

As shown in FIG. 2A, the cap 20 has a bottomed cylindrical shape and includes an upper base 20a. A female thread 20c is formed on the inner circumferential surface of the cap 20 and is screwed into the male thread 13e of the outer container 13. An opening 20b is formed in the center of the upper base 20a of the cap 20, through which the stem 22 and the base of the operation button 23 are passed. The cap 20 and the valve 21 without the operation button 23 are treated as a valve unit or a valve assembly.

Valve 21 is covered by cap 20. This valve 21 includes a valve housing 24 having a cylindrical shape with a bottom, the aforementioned stem 22 that is housed inside the valve housing 24 so as to be able to move up and down, a spring 25 that biases the stem 22 upward, and a stem rubber 26. and a valve holder 18 having a cylindrical valve holding part 18a that holds the upper part of the valve housing 24, and constitutes a discharge passage for the stock solution C. The stem 22, the spring 25, and the stem rubber 26 constitute a valve mechanism B that switches between a discharge state and a non-discharge state of the stock solution C, and this valve mechanism B is provided inside the valve housing 24. It is housed in the housing section 24a. The valve holder 18 covers the housing portion 24a and restricts the valve mechanism B from coming out from the valve housing 24.

An opening section 27 for opening the closing section 15d is provided at the lower end of the valve housing 24. The bottom surface 27a of the unsealing section 27 is made flat so as to come into contact with the top surface of the pressure receiving section 15d1. Further, the diameter is the same as or somewhat smaller than the diameter of the range surrounded by the thin portion 15f. Further, a sealing member 28 such as an O-ring is attached to the lower outer periphery of the valve housing 24. This sealing member 28 seals between the inner peripheral surface of the fitting cylinder portion 15a1 of the lid body 15 and the valve housing 24 during and after unsealing.

By the way, the valve housing 24 is divided into a main body member 29 having a housing portion 24a and an unsealing member 30 having an unsealing portion 27, as shown in FIGS. 3A and 3B.

The main body member 29 has a cylindrical shape with a bottom, and an insertion hole 29a that communicates with the inside of the housing portion 24a is provided at the center of the bottom of the main body member 29. The insertion hole 29a has a circular cross-sectional shape. A seal groove 29b for mounting the seal member 28 is provided on the lower outer periphery of the main body member 29. The upper end of the main body member 29 is provided with a frame 29c for surrounding the stem rubber 26 and a seal protrusion 29d that comes into contact with the stem rubber 26 to form a seal.

The unsealing member 30 has a downward arrow shape when viewed from the side, and a portion corresponding to the shaft of the arrow is an insertion portion 30a that is inserted into the insertion hole 29a. The insertion portion 30a has a substantially cylindrical shape, and a groove 30b is provided on the outer circumferential surface in parallel to the axial direction. As shown in FIG. 3E, this groove 30b is a gap that functions as a filter part 31 between the inner peripheral surface of the insertion hole 29a and the outer peripheral surface of the insertion part 30a when the insertion part 30a is inserted into the insertion hole 29a. In other words, it is for forming the filter portion 31 in the gap between the members. A plurality of grooves 30b are provided at equal intervals in the circumferential direction, as shown in FIGS. 3C and 3E. However, it is not necessary to provide them at equal intervals, and there may be only one. The groove depth of the groove 30b is selected depending on the size of the debris to be captured. For example, it is 0.05 to 1 mm, preferably 0.1 to 0.5 mm.

The insertion portion 30a is provided on an extension of the opening portion 27, and it can be said that the insertion portion 30a and the opening portion 27 constitute one substantially cylindrical component. Furthermore, the direction in which the insertion portion 30a is inserted into the insertion hole 29a is parallel to the direction in which the closing portion 15d of the lid 15 is opened by the opening portion 27. Furthermore, the insertion section 30a and the unsealing section 27 are located on the same line. The outer peripheral surface of the insertion portion 30a is provided with a retaining portion 30c that slightly bulges radially outward and prevents the insertion portion 30a from coming off from the insertion hole 29a. Further, a contact portion 30d is provided on the outside of the insertion portion 30a, which comes into contact with the bottom of the main body member 29 when the insertion portion 30a is inserted into the insertion hole 29a. The contact portion 30d is annular (doughnut-shaped), and a gap is formed between its inner circumferential surface and the outer circumferential surface of the insertion portion 30a. Note that this gap becomes a communication path 30e that communicates the inside of the pressurized product 11a and the inside of the housing section 24a. A plurality of (five in FIG. 3C) protective walls 30f are provided from the outer peripheral surface of the unsealing part 27 toward the contact part 30d, and the contact part 30d is supported by the protective walls 30f. The protective walls 30f are plate-shaped or rod-shaped, and are provided diagonally from the unsealing part 27 toward the contact part 30d and at equal intervals in the circumferential direction, thereby making the unsealing member 30 arrow-shaped. It is preferable to provide at least two protective walls 30f. Since the plurality of protection walls 30f are provided on the upstream side, the communication path 30e is open between the two protection walls 30f.

The position in the height direction of the bottom surface 27a of the unsealing portion 27 is such that it comes into contact with the pressure receiving portion 15d1 when the cap 20 is screwed onto the male screw 13e of the outer container 13 about once or twice. Therefore, at the time of shipment and distribution, the cap 20 is loosely screwed together, the closing portion 15d is not broken, and the discharge member 12 and the double pressurized container 11 can be temporarily connected in a sealed state.

As shown in FIG. 2A, the valve holder 18 includes a valve holding portion 18a, an annular rubber presser 18b extending inward from the upper end of the valve holding portion 18a, and a flange 18c extending outward. A hole 18d through which the stem 22 passes is formed in the center.

Next, attachment of the discharge member 12 to the pressurized product 11a will be explained. When a user uses a purchased dispensing device 10, first screw the cap 20 onto the male thread 13e of the external container 13. As a result, the entire cap 20 and the valve 21 are lowered, and the bottom surface 27a of the opening section 27 pushes down the closing section 15d (pushing it downward). As a result, the thin portion 15f is broken, and the closing portion 15d is torn off from the fitting cylinder portion 15a1, separated from the bottom portion 15c, and falls off. Then, the unsealing part 27 pierces the bottom part 15c of the fitting cylinder part 15a1, and communicates the inside of the housing 24 with the stock solution storage chamber Sc, which is inside the internal container 14 (see FIG. 4). The fallen closure part 15d falls to the bottom of the inner container 14.

Note that since the cap 20 is screwed onto the external container 13, the amount of descent of the valve 21 relative to the amount of operation of the cap 20 is small. Therefore, the bottom surface 27a of the opening section 27 gradually presses the pressure receiving section 15d1 of the closing section 15d. Since the lid body 15 is made of synthetic resin, when it is gradually pressed, the closing part 15d easily stretches due to its extensibility and is difficult to break. However, since the closing portion 15d is surrounded by the annular thin wall portion 15f and the pressure receiving portion 15d1 protrudes, the stress concentration on the thin wall portion 15f increases and it can be broken smoothly. Further, since the bottom surface 27a of the unsealing portion 27 is flat, it is not easily deformed by the unsealing operation, and the discharge member 12 can be used repeatedly.

The closing part 15d has a thick, approximately circular pressure receiving part 15d1 on the upper part, which is provided on the central axis of the lid 15, and is in contact with the circular bottom surface 27a of the opening part 27, so that the pressure is not applied by the bottom surface 27a. When pressed, the closing portion 15d is pushed straight in and breaks along the thin wall portion 15f, and the broken closing portion 15d falls off and falls to the bottom of the inner container 14. However, the pressure receiving portion 15d1 or the bottom surface 27a of the unsealing portion 27 may be inclined so that the thin portions 15f are sequentially broken from one side toward the other. Further, the closing portion 15d may not fall off and may remain connected via the thin portion 15f or the like.

When the closing part 15d is torn, the stock solution C may leak from the gap between the inner periphery of the bottom part 15c and the outer periphery of the opening part 27. However, since the space between the fitting cylindrical portion 15a1 and the housing 24 is sealed by the sealing member 28, the stock solution C remains within the fitting cylindrical portion 15a1 and does not leak to the outside. In addition, the reaction force at the time of rupture and the internal pressure after rupture act to push up the housing 24, but the cap 20 and the outer container 13 are screwed together, and the upper base 20a of the cap 20 and the valve holder 18 are Since the discharge member 12 is supported by the support member 1, the discharge member 12 is prevented from popping out. In this state, it can be said that the valve 21 is attached by the cap 20. Further, deformation of the upper base 20a of the cap 20 is suppressed.

After attaching the discharge member 12, when the user presses the operation button 23 attached to the stem 22, the stem 22 is lowered, the stem rubber 26 is bent, and the stem hole is opened. Since the stock solution C in the stock solution storage chamber Sc is pressurized by the pressurizing agent P via the internal container 14, there is It is discharged to the outside via the button 23. As described above, since the valve housing 24 of the present invention is provided with the protective wall 30f on the upstream side of the communication passage 30e, even if large fragments are generated when the closing portion 15d is opened, the fragments will not reach the communication passage 30e. The debris can be filtered out by the protective wall 30f beforehand, and the communication path 30e can be prevented from being blocked by the debris. Furthermore, since the filter section 31 is provided between the communication passage 30e and the valve mechanism B, small debris that has passed through the protective wall 30f and the communication passage 30e can be filtered out, preventing debris from entering the valve mechanism B. It is possible to suppress problems that occur due to, for example, clogging of the stem hole or seal failure due to adhesion to the stem rubber 26, and it is possible to continue to maintain a desired discharge state. In particular, since a plurality of filter parts 31 are provided around the outer periphery of the insertion part 30a (distributed in an annular manner), even if relatively large debris flows, the number of filter parts 31 that are blocked can be reduced. This makes it possible to realize stable discharge over a long period of time compared to the case where the filter sections are all provided in one place.

Note that when you release your finger from the operation button 23, the stem 22 rises and the discharge stops. The pressurizing agent storage chamber Sp filled with the pressurizing agent P is closed by the lid 15 and does not communicate with the outside or the stock solution storage chamber Sc, so the pressurizing agent P will not leak to the outside during the discharge operation. There isn't.

5 and 6 show another valve housing 24A. This valve housing 24A uses a filter member 32 to form a filter portion 31. Specifically, as shown in FIGS. 5A and 5C, a plurality of wave-shaped grooves 30b are provided on the outer peripheral surface and a filter member 32 shaped like a gear in plan view is inserted into the housing portion 24a. A gap that functions as the filter section 31 is formed between the inner circumferential surface of the portion 24a and the outer circumferential surface of the filter member 32 (see FIGS. 5D and 6). The filter member 32 is pressed from above by the spring 25 of the valve mechanism B, and is fixed within the housing portion 24a. Therefore, even if an upward force is applied from the stock solution C during discharge, upward movement (downstream) is suppressed. In addition, in fixing the filter member 32, the outer diameter of the filter member 32 may be made larger than the inner diameter of the accommodating portion 24a, and the filter member 32 may be press-fitted, or may be fixed by adhesion or welding. Four protective walls 30f are provided, dividing the communication path 30e into four. This valve housing 24A is similar to the valve housing 24 of FIG. 3, except that it is not separated into a main body member 29 and an unsealing member 30, and the accommodating part 24a and the unsealing part 27 are integrated as a main body member 29A. Therefore, the same reference numerals are used, and detailed explanation will be omitted.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the invention. For example, in the valve housing 24 of FIG. 3, the opening member 30 is provided with the groove 30b, but the main body member 29 may be provided with the groove 30b, or both may be provided with the groove 30b. Similarly, in the valve housing 24A of FIG. 5, the filter member 32 is provided with the groove 30b, but the groove 30b may be provided on the inner peripheral surface of the housing portion 24a, or the groove 30b may be provided on both sides. Good too. The point is that a gap that functions as the filter section 31 may be formed between the members by combining the members. Furthermore, although a double pressurized container was used as the container 11, a single container may also be used. That is, a pressurized product may be obtained by filling the external container 13 with the stock solution C and the pressurizing agent P without providing the internal container 14.

10 Discharge device 11 Double pressurized container 11a Pressurized product 12 Discharge member C Stock solution P Pressurizing agent 13 External container 13a Bottom portion 13a1 Ground surface 13a2 Dome portion 13b Body portion 13c Shoulder portion 13d Neck portion 13d1 Support portion 13e Male thread 13f Top of neck portion End face 13g Annular protrusion 14 Internal container Sc Stock solution storage chamber Sp Pressurizing agent storage chamber 14a Bottom part 14a1 Recessed part 14a2 Dome part 14b Body part 14c Shoulder part 14d Neck part 14d1 Upper part 14d2 Tapered part 14d3 Hanging part 14e Upper end surface 14f Flange 14g Annular projection 14h Horizontal groove 14i Vertical groove 15 Lid body 15a Sealing part 15a1 Fitting cylinder part 15a3 Lower part 15a4 Lower end 15a5 Lower cylinder part 15a6 Connecting part 15b Flange 15c Bottom part 15d Closing part 15d1 Pressure receiving part 15f Thin wall part (broken part)
15g Reinforcement rib 16 Container body 17 Annular disc part 17a Outer cylinder part 18 Valve holder 18a Valve holding part 18b Rubber retainer 18c Flange 18d (Stem passes through) Hole 20 Cap (installation part)
20a Upper base 20b Opening 20c Female thread 21 Valve 22 Stem 23 Operation buttons 24, 24A Valve housing 24a Accommodation section 25 Spring 26 Stem rubber 27 Opening section 27a Bottom surface 28 (of opening section) Seal members 29, 29A Main body member 29a Insertion hole 29b Seal Groove 29c Frame portion 29d Seal protrusion 30 Unsealing member 30a Insertion portion 30b Concave groove 30c Retaining portion 30d Contact portion 30e Communication path 30f Protective wall 31 Filter portion 32 Filter member B Valve mechanism

Claims (6)

an accommodating section that accommodates a valve mechanism;
an opening part that protrudes below the storage part and is opened by pushing the lid of the pressurized product;
Multiple protective walls provided around the outer periphery of the unsealed part,
a communication path that opens between the protective walls and communicates the inside of the pressurized product and the inside of the storage section;
A valve housing including a filter section provided between a communication passage and a valve mechanism. The valve housing according to claim 1, wherein the filter portion is formed by a gap created between the members when the members are combined. a main body member having a housing part;
It is divided into an unsealing member having an unsealing part,
The main body member is provided with an insertion hole that communicates with the inside of the accommodating part,
The opening member is provided with an insertion portion that is inserted into the insertion hole,
3. The valve housing according to claim 1, wherein the filter portion is formed by a gap created between the inner circumferential surface of the insertion hole and the outer circumferential surface of the insertion portion. 4. The valve housing according to claim 3, wherein the insertion direction of the insertion section is parallel to the direction in which the lid is opened by the opening section. comprising a filter member inserted into the housing part,
3. The valve housing according to claim 1, wherein the filter portion is formed by a gap created between an inner circumferential surface of the accommodating portion and an outer circumferential surface of the filter member. 6. The valve housing of claim 5, wherein the filter member is secured by a valve mechanism.

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