JP2013159370A - Foam discharger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foam discharger capable of simplifying an assembly line and improving productivity by performing a process up to a step of assembling a liquid piston by sequentially stacking respective constructional elements from a position above a cylinder part.SOLUTION: A foam discharger includes a cylinder part 17 including an air chamber 24 and a liquid introduction chamber 28, a piston part 38 including a cylindrical piston member 15 slid along the inner peripheral surface of the liquid introduction chamber 28 and an air piston member 16 slid along the inner peripheral surface of the air chamber 24, an introduction path valve member 42 disposed at the lower end of the liquid introduction chamber 28 to open and close a liquid introduction path 41, and a spring member 29 for pressing a pressed pump head part 19 upward. A spring reception stage part 43 is disposed at the lower end of the liquid introduction chamber 28. A valve seat part 44 is disposed below the spring reception stage part 43. The introduction path valve member 42 is formed by including a peripheral edge flange part 42a mounted on the spring reception stage part 43 and an elastic valve seat part 42b stuck to the valve seat part 44.

Description

  The present invention relates to a foam dispenser, and more particularly, to a foam dispenser that is used by being attached to a mouth neck portion of a container body and that discharges the contained content liquid into a foam by mixing it with air.

  For example, by containing liquid cleaning agents or hair preparations, and pressing the pump head while the container is left in place, the liquid content is made foamy without the need for manual stirring. Various foam discharge containers such as a pump former container to be discharged have been developed. In such a foam discharge container, a foam discharger is mounted on the mouth neck of the container body to discharge the content liquid into a foam by mixing it with air. For example, the foam discharger includes a piston (liquid piston) that sucks, pressurizes, and discharges the content liquid, and a piston that sucks, pressurizes, and discharges air (on the base cap portion attached to the mouth of the container body) There is provided a pump composed of a single cylinder portion having a large-diameter air chamber and a small-diameter liquid introduction chamber each incorporating a concentric series arrangement of air pistons). Then, each piston of the pump is operated by pushing the pump head part protruding above the base cap part, and the liquid and air are pressurized and discharged in the cylinder part respectively and mixed with each other in the merge space, mesh ring, etc. It is made into the foam-like state by letting the foam production | generation member pass, and it has the structure which discharges the content liquid outside (for example, refer patent document 1 and patent document 2).

JP 2008-189316 A JP 2010-227822 A

  In the above-mentioned foam discharger, in addition to these pistons and cylinders, the pump consisting of a liquid piston, air piston, cylinder, etc., opens and closes the flow path of the internal solution as the content liquid is sucked, pressurized, and discharged. It is necessary to incorporate a valve body such as a ball valve or poppet valve, an air valve that opens and closes the air flow path when air is sucked, pressurized, or discharged, a foam generating member, etc. It becomes complicated and the assembly process becomes complicated.

  In particular, when a poppet valve is used as a valve body for opening and closing a liquid introduction path for introducing the content liquid from the container body into the liquid introduction chamber via a dip tube or the like, the poppet valve is a valve seat at the lower end of the liquid introduction chamber. The lower end portion of the liquid piston, and the lower end portion of the liquid piston and the lower end portion of the liquid piston. It is necessary to attach to the inside of a liquid piston in the state which has arrange | positioned between them and the spring member which urges | biases the pressed pump head part upwards is arrange | positioned (refer FIG.5 (c)).

  For this reason, as shown in FIGS. 5A to 5C, when assembling the foam dispenser, the stem 51 is once inverted, and from above, the liquid piston 52, the spring member 53, and the poppet. After the valves 54 are assembled to the stem 51 in this order (see FIG. 5B), they are turned upside down to return to the upright state, and then the large-diameter air chamber 55a and the small-diameter liquid introduction chamber 55b. A process of assembling the cylinder part 55 (see FIG. 5 (a)) including the above from the upper side (see FIG. 5 (c)) becomes complicated. Therefore, the process until the liquid piston is assembled to the cylinder part having the large-diameter air chamber and the small-diameter liquid introduction chamber can be performed by stacking and assembling the constituent members from above the cylinder part. Development of new technology that can simplify the line and improve productivity is desired.

  In the present invention, the process until the liquid piston is assembled to the cylinder portion having the large-diameter air chamber and the small-diameter liquid introduction chamber can be performed by sequentially stacking and assembling the constituent members from above the cylinder portion. An object of the present invention is to provide a foam dispenser capable of simplifying an assembly line and improving productivity.

  The present invention includes a pump head portion that is attached to a mouth neck portion of a container body via a cap portion and is provided so as to be able to reciprocate with respect to the cap portion. When the pump head portion is pressed, The first flow path for sending the content liquid from the pressurized liquid chamber to the mixing chamber and the second flow path for sending air from the pressurized air chamber to the mixing chamber are opened, and the sent to the mixing chamber A foam discharger that mixes and foams the content liquid with the air in a foaming flow path extending from the mixing chamber to the discharge port, and is disposed inside the mouth part of the container body. A cylinder portion comprising a chamber and a small diameter liquid introduction chamber, a cylindrical piston member sliding along the inner peripheral surface of the liquid introduction chamber, and the air chamber provided to project radially outward from the cylindrical piston member Pis consisting of an air piston member that slides along the inner peripheral surface Interposed between the lower end portion of the liquid introduction chamber and the lower end portion of the cylindrical piston member. And a spring member that urges the pump head portion provided and pressed upward, and a spring receiving step portion is provided along the inner peripheral surface of the lower end portion of the liquid introduction chamber. And a valve seat portion is provided below the spring receiving step portion, and the introduction path valve member includes a peripheral flange portion placed on the spring receiving step portion in a state where the content liquid can flow. And an elastic valve portion that is in close contact with the valve seat portion in a state where the peripheral flange portion is placed on the spring receiving step portion, and a lower end portion of the spring member is formed by the spring receiving step portion. In the state where the peripheral flange portion of the introduction path valve member is sandwiched between By providing a foam dispenser which is supported by a spring receiving step portion is obtained by achieving the above object.

  According to the foam dispenser of the present invention, the steps until the liquid piston is assembled to the cylinder part having the large-diameter air chamber and the small-diameter liquid introduction chamber are assembled by sequentially stacking the constituent members from above the cylinder part. As a result, the assembly line can be simplified and the productivity can be improved.

(A) is sectional drawing of the foam dispenser which concerns on preferable one Embodiment of this invention, (b) is the A section enlarged view of (a). (A) is sectional drawing of the state before pressing a pump head part, (b) is sectional drawing of the state immediately after starting the pressing of a pump head part of the foam discharger which concerns on preferable one Embodiment of this invention, (C) is sectional drawing of the state which pressed the pump head part to the last, (d) is sectional drawing of the state immediately after releasing the press of a pump head part. (A)-(e) is sectional drawing explaining the assembly process of the foam dispenser which concerns on preferable one Embodiment of this invention. (A)-(e) is sectional drawing explaining the assembly process of the foam dispenser which concerns on preferable one Embodiment of this invention. (A)-(c) is sectional drawing explaining the assembly process of the conventional foam discharger.

  A foam dispenser 10 according to a preferred embodiment of the present invention shown in FIGS. 1 (a) and 1 (b) is a pump former used by being attached to a so-called pump former container, and is similar to a conventional pump former. It is attached to the mouth part 40a of the container body 40 and has a function of discharging the content liquid into a foam by mixing it with air. That is, the foam discharger 10 is a cylindrical piston member 15 as a liquid piston that is attached to the base cap part 14 attached to the mouth part 40a of the container body 40 and performs suction, pressurization, and discharge of the content liquid. It has a pump 18 including a single cylinder portion 17 in which air piston members 16 as air pistons for sucking, pressurizing, and discharging air are concentrically arranged in series. Then, the piston heads 15 and 16 of the pump 18 are actuated by pushing the pump head part 19 protruding above the base cap part 14, and the contents liquid and air are pressurized and discharged in the cylinder part 17, respectively. Mixing is performed in the mixing chamber 13 provided as a merge space on the pump outlet side, and the mixture is foamed and discharged from the discharge port 26 to the outside.

  And as shown to FIG. 1 (a), (b) and FIG. 2 (a)-(d), the foam discharger 10 of this embodiment is set to the mouth part 40a of the container main body 40 (refer FIG. 1). A liquid chamber that is mounted via the base cap portion 14 and has a pump head portion 19 that is provided so as to be reciprocally movable with respect to the base cap portion 14. The liquid chamber is pressurized and reduced by pressing the pump head portion 19. The first flow path 32 for sending the content liquid from 30 to the mixing chamber 13 and the second flow path 33 for sending air from the pressurized and reduced air chamber 24 to the mixing chamber 13 are opened and sent to the mixing chamber 13. This is a pump former that mixes the content liquid with air in the foaming flow path 21 extending from the mixing chamber 13 to the discharge port 26 and causes the foamed liquid to be discharged.

  The foam discharger 10 according to the present embodiment includes a cylinder portion 17 including a large-diameter air chamber 24 and a small-diameter liquid introduction chamber 28 disposed inside the mouth neck portion 40 a of the container body 40, and a liquid introduction chamber 28. A cylindrical piston member (liquid piston) 15 that slides along the peripheral surface and an air piston member that protrudes radially outward from the cylindrical piston member 15 and slides along the inner peripheral surface of the air chamber 24 ( An air piston) 16, an introduction path valve member 42 provided at the lower end of the liquid introduction chamber 28 to open and close the liquid introduction path 41, the lower end of the liquid introduction chamber 28, and the cylindrical piston member 15. And a spring member 29 that is interposed between the lower end portion and presses the pressed pump head portion 19 upward.

  A spring receiving step portion 43 is provided along the inner peripheral surface of the lower portion of the liquid introduction chamber 28, and a valve seat portion 44 is provided below the spring receiving step portion 43. The introduction path valve member 42 has a peripheral flange portion 42a placed on the spring receiving stepped portion 43 in a state in which the content liquid can be circulated, and a state in which the peripheral flange portion 42a is placed on the spring receiving stepped portion 43, And an elastic valve part 42b for tightly attaching the valve body part 42f to the part 44. The lower end portion of the spring member 29 is supported by the spring receiving step portion 43 with the peripheral flange portion 42 a of the introduction path valve member 42 sandwiched between the spring receiving step portion 43 and the lower end portion.

  Moreover, the foam discharger 10 of this embodiment is interposed between the pump head part 19 and the cylindrical piston member 15, moves up and down integrally therewith, and is disposed above the air piston member 16. A cover body 11 having a function and an air valve function is provided. The air piston member 16 is mounted on the cylindrical piston member 15 via a cylindrical portion 16a that is loosely fitted on the outer peripheral surface of the cylindrical piston member 15 so as to be relatively displaceable with a gap of about 0.1 to 0.2 mm. Yes.

  The cover body 11 is a valve provided with a ring-shaped mounting joint part 11b having a cylindrical shape with a foam generation part 11a provided on the top surface part, and projecting radially outward from a lower end portion of the mounting joint part 11b. Plate portion 11c. The upper reduced diameter portion 15b of the upper end portion of the cylindrical piston member 15 is fitted and mounted inside the mounting joint portion 11b. The valve plate portion 11c has a lower surface portion that is in airtight contact with an outer surface (radially outer side) contact surface 20a (see FIG. 1B) of the outside air intake hole 12 formed in the air piston member 16 so as to be able to contact and separate. Thus, it functions as an on-off valve that shuts off the flow path of the outside air to the air chamber 24 via the outside air intake hole 12 so that it can be opened and closed.

  In the present embodiment, the base cap portion 14 is attached to the mouth portion 40 a of the container body 40 with the cylindrical guide stem 23 standing from the ceiling portion 14 a. The pump head portion 19 has a hollow pipe 22 that is inserted into the guide stem 23 of the base cap portion 14 so as to be relatively displaceable, and the upper end portion discharges the foamed content liquid. An outlet 26 is provided. The pump head portion 19 includes a cover body 11 that is integrally connected to the pump head portion 19 by fitting the upper fitting wall 11d of the cover body 11 into the lower end portion of the hollow pipe 22, and a mounting joint portion of the cover body 11 It is biased upward by the action of a spring member 29 provided in the liquid introduction chamber 28 of the cylinder portion 17 through a cylindrical piston member 15 whose upper end portion is integrally mounted on 11b.

  The foam dispenser 10 of the present embodiment presses the pump head portion 19 against the urging force of the spring member 29 in substantially the same manner as the foam dispenser described in JP 2010-227822 A, The cylindrical piston member 15 and the air piston member 16 of the pump 18 are pushed down, and the ball valve 31a moves upward by the liquid pressure of the liquid in the liquid chamber 30 formed inside the cylindrical piston member 15, and the first The flow path 32 is opened. As a result, the liquid content is pressurized and discharged from the liquid chamber 30 toward the foaming channel 21 in the hollow pipe 22 (see FIG. 2C). Further, the base end portion of the upper reduced diameter portion 15b of the cylindrical piston member 15 and the loose fitting portion between the cylindrical portion 16a of the air piston member 16 and the upper reduced diameter portion 15b of the upper end portion of the cylindrical piston member 15 and the cover body 11 The second flow path 33 is formed by extending in the axial direction along the fitting attachment portion with the attachment joint portion 11b, and by, for example, a linear notch or the like provided on the inner peripheral surface or the outer peripheral surface. It is formed as a flow path (see FIG. 1B). By opening a closing portion 36 to be described later, the second flow path 33 can be circulated, and the air in the air chamber 24 is pressurized and discharged toward the foaming flow path 21 in the hollow pipe 22 (FIG. 2C). reference). The content liquid and the air discharged toward the foaming flow path 21 are pressure-mixed in the mixing chamber 13 as a merge space provided in the upper part of the attachment joint portion 11 b of the cover body 11. Further, the mixed liquid of the content liquid and air pressure-mixed in the mixing chamber 13 is the second foam provided at the upper end of the foam generating part 11 a of the top surface part of the cover body 11 and the hollow pipe 22 of the pump head part 19. After foaming by passing through the generating part 22a, it is discharged in the form of bubbles from the discharge port 26 of the pump head part 19.

  Here, if the pressure of the pump head portion 19 is released, the pump head portion 19 is pushed upward by the biasing force of the spring member 29, the cylindrical piston member 15 and the air piston member 16 are also pushed up, and the ball valve 31a is The first flow path 32 is closed by moving downward by its own weight (see FIG. 2D). In addition, since the liquid chamber 30 inside the cylindrical piston member 15 becomes negative due to the blockage of the ball valve 31a, the elastic valve portion 42 of the introduction path valve member 42 described later elastically deforms, so that the valve body portion 42f The state of close contact with the valve seat portion 44 is released, and the content liquid inside the container main body 40 passes through the liquid introduction passage 41 that extends downward from the lower end portions of the dip tube 45 and the liquid introduction chamber 28. Thus, the liquid is introduced into the liquid introduction chamber 28 (see FIG. 2D).

  Furthermore, due to the rise of the pump head part 19 and the relative rise of the cylindrical piston member 15 with respect to the air piston member 16, a closing part 36 to be described later is closed, and the air passing through the second flow path 33 is blocked. Distribution is blocked. Further, the close contact state of the outside air intake hole 12 formed in the air piston member 16 with the valve plate portion 11c of the cover body 11 to the close contact surface 20a is released (see FIGS. 1B and 2D). . Furthermore, after the closing portion 36 is closed, the air piston member 16 is lifted, so that the air chamber 24 becomes negative pressure and a suction force is generated. Due to this suction force, the outside air that has passed through the gap between the hollow pipe 22 and the guide stem 23 passes through the outside air intake hole 12 opened from the state closed by the valve plate portion 11c of the cover body 11 to the air chamber. 24 (see FIGS. 1B and 2D).

  In the present embodiment, the foam discharger 10 has a skirt-like cover 25 arranged concentrically outside the hollow pipe 22 of the pump head portion 19 between the hollow pipe 22 and the guide stem 23. It is provided so as to cover the gap. Since the skirt-like cover 25 is provided, when outside air is sucked through the gap between the hollow pipe 22 and the guide stem 23, the pump head together with the outside air is sucked from these gaps as the outside air is sucked. Water around the portion 19 and the base cap portion 14 can be considerably prevented from flowing into the air chamber 24.

  In the foam discharger 10 of the present embodiment, a closing portion 36 that opens and closes the second flow path 33 that is an air flow path is provided at the lower end portion of the loose fitting portion between the cylindrical piston member 15 and the air piston member 16. (See FIG. 1B). That is, in the present embodiment, the cylindrical piston member 15 is connected to the attachment joint portion 11b of the cover body 11 in which the upper fitting wall 11d is fitted into the hollow pipe 22 of the pump head portion 19 and integrally connected. The upper reduced diameter portion 15b is fitted and mounted as a unit, so that it moves up and down integrally with the hollow pipe 22. On the other hand, the air piston member 16 is loosely fitted on the outer peripheral surface of the proximal end portion of the upper reduced diameter portion 15b of the cylindrical piston member 15 so as to be relatively displaceable with a gap of about 0.1 to 0.2 mm. The cylindrical portion 16a, the protruding portion 16b that protrudes outward from the upper end portion of the cylindrical portion 16a, and the outer peripheral tip portion of the protruding portion 16b are provided to slide in close contact with the inner peripheral surface of the air chamber 24. It consists of the outer periphery piston part 16c provided with the outer peripheral surface which touches movably.

  Further, in the upper diameter-reduced portion 15 b of the cylindrical piston member 15, a step contact contact surface 15 c is provided at the lower end of the base end portion where the cylindrical portion 16 a of the air piston member 16 is loosely fitted. Are provided continuously. By bringing the lower end portion 38 of the cylindrical portion 16a of the air piston member 16 into close contact with the step contact abutment surface 15c, the second flow path 33 that is an air flow path can be closed at the lower end. . That is, the closed portion 36 is configured by the step contact contact surface 15 c of the cylindrical piston member 15 and the lower end portion 38 of the cylindrical portion 16 a of the air piston member 16.

  In this embodiment, if the pump head part 19 is pushed down from the state before the pump head part 19 is pressed as shown in FIG. 2A, the cylindrical part 16a of the air piston member 16 and the upper part of the cylindrical piston member 15 Since the reduced diameter portion 15b is loosely fitted and the adhesion force of the outer peripheral piston portion 16c to the inner peripheral surface of the air chamber 24 is larger, first, as shown in FIG. In addition to the hollow pipe 22 and the cover body 11, the cylindrical piston member 15 is such that the lower surface portion of the valve plate portion 11c of the cover body 11 is the close contact surface 20a outside the outside air intake hole 12 of the air piston member 16 (FIG. 1B). The air piston member 16 slides downward relative to the air piston member 16 until it comes into contact with and closely contacts. Accordingly, the close contact state of the lower end portion 38 of the cylindrical portion 16a of the air piston member 16 with the step contact close contact surface 15c of the cylindrical piston member 15 is released, so that the closing portion 36 is opened, It will be in the state which can distribute | circulate air to the two flow paths 33 (refer FIG.2 (b)).

  If the pump head portion 19 is further pushed down, the cylindrical piston member 15 and the air piston member 16 are integrally pushed down together with the hollow pipe 22 and the cover body 11. As a result, the liquid content is pressurized and discharged from the liquid chamber 30 formed inside the cylindrical piston member 15 toward the foaming flow path 21 in the hollow pipe 22 via the first flow path 32. The air in the air chamber 24 is discharged toward the foaming channel 21 in the hollow pipe 22 through the second channel 33. Further, the mixed liquid of the content liquid and air pressure-mixed in the mixing chamber 13 is the second foam provided at the top of the foam generating part 11 a of the top surface part of the cover body 11 and the hollow pipe 22 of the pump head part 19. After foaming by passing through the generating part 22a, it is discharged in the form of bubbles from the discharge port 26 of the pump head part 19.

  As shown in FIG. 2 (c), when the outer peripheral piston portion 16c of the air piston member 16 reaches the vicinity of the bottom of the air chamber 24 and presses the pump head portion 19 until the end of one stroke (see FIG. 2 (c)), The pressing of the pump head part 19 is released. When the pressing of the pump head portion 19 is released, first, as shown in FIG. 2 (d), the cylindrical portion 16a of the air piston member 16 and the upper reduced diameter portion 15b of the cylindrical piston member 15 are loosely fitted. The cylindrical piston member 15 together with the hollow pipe 22 and the cover body 11 is urged by the urging force of the spring member 29 because the adhesion force of the outer peripheral piston portion 16c to the inner peripheral surface of the air chamber 24 is larger. The air piston member 16 slides upward relative to the air piston member 16. Accordingly, the step contact contact surface 15c of the cylindrical piston member 15 moves upward with respect to the air piston member 16, so that the lower end 38 of the cylindrical portion 16a contacts the step contact contact surface 15c. As a result, the closing portion 36 is closed to block the air flow through the second flow path 33 (see FIG. 1B). Further, since the lower surface portion of the valve plate portion 11c of the cover body 11 is released from the close contact state of the air piston member 16 to the close contact surface 20a of the outside air intake hole 12, the air chamber 24 is connected via the outside air intake hole 12. It becomes possible to take in outside air into the inside (see FIG. 1B).

  In the present embodiment, the cover body 11 provided to be interposed between the pump head portion 19 and the cylindrical piston member 15 is preferably a molded product made of synthetic resin, and the foam generating portion 11a is the top surface portion. A bowl-shaped cap-shaped portion comprising a mounting joint portion 11b having a cylindrical shape provided on the outer periphery and a valve plate portion 11c projecting radially outward from the lower end portion of the mounting joint portion 11b. A cylindrical upper fitting wall 11d having an outer diameter similar to the outer diameter extending from the mounting joint 11b is formed. In the present embodiment, the cover body 11 is integrally connected to the pump head portion 19 by fitting the upper portion of the upper fitting wall 11 d into the lower end portion of the hollow pipe 22.

  In the present embodiment, the foam generating portion 11a provided on the top surface portion of the mounting joint portion 11b of the cover body 11 is formed with the cover body 11 to be a formed mesh provided on the top surface portion. By making the foam generating part 11a a molded mesh integrally formed with the cover body 11, the number of parts can be reduced, the structure of the foam discharger 10 can be simplified more efficiently, and the assembly process can be performed. It becomes possible to further simplify.

  In this embodiment, as shown in FIG. 1B, an annular guide wall 11e is provided so as to protrude downward from a portion surrounding the periphery of the bubble generating portion 11a in the top surface portion of the mounting joint portion 11b of the cover body 11. Yes. Since the annular guide wall 11e is provided, the air flowing into the mixing chamber 13 through the second flow path 33 is guided downward so as to circulate around the annular guide wall 11e, and then the mixing chamber 13 In the above, by making the content liquid and air face each other, it is possible to further effectively mix and improve the quality of the foam-like content liquid foamed by the foam generation unit 11a.

  In the present embodiment, as shown in FIG. 1 (b), a flow path of outside air that extends downward from the peripheral edge of the valve plate portion 11 c of the cover body 11 to the air chamber 24 via the outside air intake hole 12. 11f, an annular overlap wall 11f is disposed in the circumferential direction so as to overlap the outer side (radially outer side) of the annular outer skirt wall 20 provided outside the outside air intake hole 12 of the air piston member 16. It is provided continuously. An annular overlap wall 11 f is provided on the cover body 11 so as to overlap with the outer side of the annular outer skirt wall 20 of the air piston member 16. Therefore, it is possible to more effectively avoid the water around the pump head portion 19 and the base cap portion 14 from flowing into the air chamber 24 as the outside air in the air chamber 24 is sucked. It becomes possible. The radial distance between the annular overlap wall 11 f and the annular outer skirt wall 20 is preferably wide from the viewpoint of preventing water from flowing into the air chamber 24. Practically, it is preferable to maintain an interval of about 1 to 2 mm or more.

  In the present embodiment, as described above, the air piston member 16 protrudes outward from the cylindrical portion 16a that is loosely fitted to the outer peripheral surface of the cylindrical piston member 15 so as to be relatively displaceable, and the upper end portion of the cylindrical portion 16a. It consists of an overhang part 16b provided and an outer peripheral piston part 16c provided at the outer peripheral tip of the overhang part 16b. As shown in FIG. 1B, the overhanging portion 16b is further vertically connected to the annular flat plate portion 16e, which is a joint base end portion with the cylindrical portion 16a, and the outer peripheral edge portion of the annular flat plate portion 16e. The annular outer skirt wall 20 is formed, and a downwardly sloped surface portion 16f joined to be inclined downward from the lower end portion of the annular outer skirt wall 20 toward the radially outer side. An outer peripheral piston portion 16c is provided on the outer peripheral edge portion of the descending slope surface portion 16f.

  In the present embodiment, a portion of the annular flat plate portion 16e adjacent to the annular outer skirt wall 20 penetrates the annular flat plate portion 16e up and down, and the outside air intake holes 12 are provided at a plurality of locations (for example, circumferentially spaced) (for example, In addition, one outside air intake hole is opened at a total of four locations every 90 degrees in the circumferential direction. In the present embodiment, the upper end surface of the annular outer skirt wall 20 has a valve plate of the cover body 11 that functions as an on-off valve when blocking the flow path of the outside air to the air chamber 24 via the outside air intake hole 12. A close contact surface 20a is formed to tightly contact the lower surface portion of the portion 11c. In the present embodiment, the annular contact rib 11g is continuously provided over the entire circumference of the lower surface portion of the valve plate portion 11c of the portion of the annular outer skirt wall 20 that is in close contact with the contact surface 20a. Protrusively provided. By interposing this annular contact rib 11g, it becomes possible to make the lower surface portion of the valve plate portion 11c adhere to the contact surface 20a in an airtight manner in a stable state.

  And in this embodiment, as shown to Fig.1 (a) and FIG.2 (a)-(d), it provided in the lower end part of the liquid introduction chamber 28 so that it might be extended below from the said lower end part. An introduction path valve member 42 that opens and closes the liquid introduction path 41 is provided. The introduction path valve member 42 is preferably a molded product made of synthetic resin, and as described above, the peripheral flange portion 42a placed on the spring receiving step portion 43 at the lower end portion of the liquid introduction chamber 28, the valve seat, And an elastic valve portion 42 b that can be in close contact with the portion 44. The introduction path valve member 42 further includes an insertion convex portion 42c provided so as to stand above the peripheral flange portion 42a.

  The peripheral flange portion 42a is provided as a peripheral portion of a disk-shaped base portion 42d having an outer diameter that is slightly smaller than the inner diameter of the liquid introduction chamber 28 and substantially the same as this. The peripheral flange portion 42a has, for example, outer portions of the base portion 42d, which are outside the insertion convex portion 42c, cut out in a radial direction as cutout portions for liquid circulation at a plurality of locations spaced at predetermined intervals in the circumferential direction. (Not shown), the liquid content can be circulated between the liquid introduction path 41 and the liquid introduction chamber 28 through the notch even when the spring is placed on the spring receiving step portion 43. It is like that.

  Further, the peripheral flange portion 42 a is provided and pressed between the spring receiving step portion 43 at the lower end portion of the liquid introduction chamber 28 and the close sliding portion 15 a at the lower end portion of the cylindrical piston member 15. By being pressed from above by a spring member 29 that urges the pump head portion 19 upward, the state of being placed on the spring receiving step portion 43 is maintained.

  Here, the spring member 29 is a coiled spring member, and an upper end portion thereof is supported by the close sliding portion 15 a of the cylindrical piston member 15 that slides along the inner peripheral surface of the liquid introduction chamber 28. At the same time, the lower end portion is attached to the inside of the liquid introduction chamber 28 while being supported by the spring receiving stepped portion 43 while sandwiching the peripheral flange portion 42a of the introduction path valve member 42.

  The elastic valve portion 42b is provided extending downward from the central portion of the base portion 42d, and includes, for example, a plate-shaped leaf spring portion 42e that can be deformed up and down and a valve body portion 42f. The elastic valve portion 42 b maintains the state in which the peripheral flange portion 42 a is placed on the spring receiving step portion 43 of the liquid introduction chamber 28, so that the leaf spring portion 42 e causes the valve body portion 42 f to move to the valve seat of the liquid introduction passage 41. The urging is performed so as to be in close contact with the portion 44. Further, as described above, when the ball chamber 31a is blocked and the liquid chamber 30 and the liquid introduction chamber 28 inside the cylindrical piston member 15 are under negative pressure (see FIG. 2D), the leaf springs are used. The portion 42e is contracted and deformed by its elasticity, so that the valve body portion 42f is separated from the valve seat portion 44, and the close contact state with the valve seat portion 44 is released, so that the content liquid inside the container body 40 is discharged into the liquid introduction chamber. 28 can be introduced by suction.

  The insertion convex part 42c protrudes from the center part of the base part 42d in an upright state and is provided in a columnar shape. The insertion convex portion 42c has an outer diameter that is slightly smaller than the inner diameter of the spring member 29 and substantially the same as this, and has a length corresponding to about 1/4 to 1/3 of the length of the liquid introduction chamber 28, for example. And is inserted and arranged inside the lower end portion of the spring member 29. Since the introduction path valve member 42 includes the insertion convex portion 42c that stands up above the peripheral flange portion 42a, the lower end portion of the spring member 29 is arranged by being inserted and arranged inside the spring member 29. It becomes possible to position in a stable state. This also enables the lower end portion of the spring member 29 to be effectively supported by the spring receiving step portion 43 with the peripheral flange portion 42a of the introduction path valve member 42 sandwiched therebetween.

  The insertion convex part 42c also has a function of preventing the content liquid from flowing out of the container during distribution of the pump former container. That is, when the pump former container is distributed, for example, a screw 25a provided on the inner wall upper portion of the skirt-like cover 25 of the pump head portion 19 and a screw 23a provided on the outer wall upper portion of the guide stem 23 are screwed together. The pump head part 19 cannot be pressed. At that time, the upper outer peripheral surface of the insertion convex portion 42c and the inner peripheral surface of the lower end portion of the cylindrical piston member 15 pushed downward are brought into close contact with each other, whereby the content liquid in the container body 40 flows out of the container. In addition to the valve body portion 42f that is in close contact with the valve seat portion 44, the function of reliably preventing the content liquid from flowing out is exhibited.

  In the present embodiment, the spring member 29 is formed longer than the length of the liquid introduction chamber 28 in a state where it is not compressed and deformed (see FIG. 3C). Further, a cylindrical guide wall 45 extending upward from a joint portion of the liquid introduction chamber 28 with the air chamber 24 and having an inner diameter similar to the inner diameter of the liquid introduction chamber 28 is formed from the lower end portion of the liquid introduction chamber 28 as a spring member. It is erected up to a position higher than 29 length. Since the cylindrical guide wall 45 is provided, when assembling the foam dispenser 10, the upper end portion of the spring member 29 can be positioned in a stable state so that the assembling can be performed more smoothly. It becomes possible. In addition, when the length of the pressing stroke by the pump head portion 19 of the foam discharger 10 is set short and the length of the spring member is shorter than the length of the liquid introduction chamber, the cylindrical guide wall 45 is It is not always necessary to provide it.

  Furthermore, in this embodiment, as shown in FIGS. 1A and 1B and FIGS. 2A to 2D, a ventilation port 31 communicating with the inside of the container body is provided on the peripheral surface of the air chamber 24. Is provided. Before the pump head portion 19 is pressed, the ventilation port 31 is covered from the inside by the outer peripheral piston portion 16c that slides along the inner peripheral surface of the air chamber 24 of the air piston member 16. Yes. By providing the ventilation port 31 on the peripheral surface of the air chamber 24, the pressure of the pump head unit 19 is released, and the liquid content is sucked from the container body 40 into the liquid chamber 30 inside the cylindrical piston member 15. In this case, it is possible to effectively avoid shrinkage and deformation of the container body 40 by reducing the content liquid inside the container body 40 by sending outside air to the container body 40 through the ventilation port 31. Become. Since the ventilation port 31 is covered and closed by the outer peripheral piston portion 16c of the air piston member 16 before the pump head portion 19 is pressed, for example, the container falls down when the pump former container is not used. At this time, it is possible to effectively avoid the content liquid from flowing into the air chamber 24 from the container body through the ventilation port 31.

  In the present embodiment, the water that has entered the inside of the cylinder portion 17 through the gap between the hollow pipe 22 and the guide stem 23 and stays above the air piston member 16 is supplied to the pump head portion. In the operation of pressing 19 or releasing the pressing, the container body 40 can be discharged through the ventilation port 31. In the present embodiment, the overhanging portion 16b of the air piston member 16 is configured to include a downward slope surface portion 16f that is inclined downward toward the radially outer side. It is possible to make them stay and discharge them to the container body 40 more smoothly.

  Further, in the present embodiment, an auxiliary piston member 46 is provided that is disposed above the valve plate portion 11 c of the cover body 11 and is loosely fitted along the outer peripheral surface of the attachment joint portion 11 b of the cover body 11. . For example, when the foam discharger 10 is fixed and circulated in a state where the pump head part 19 is pushed down, the foam discharger 10 is covered by the outer peripheral piston part 46a of the auxiliary piston member 46 so as to cover and close the ventilation port 31. During distribution of the attached pump former container, it is possible to effectively prevent the liquid content from flowing from the container body 40 into the air chamber 24 via the ventilation port 31.

  And according to the foam discharger 10 of this embodiment provided with the above-mentioned structure, the cylindrical piston member 15 which is a liquid piston with respect to the cylinder part 17 provided with the large diameter air chamber 24 and the small diameter liquid introduction chamber 28 is provided. The process up to the assembly can be performed by stacking and assembling the constituent members in order from above the cylinder portion 17, thereby simplifying the assembly line and improving the productivity.

  That is, according to the present embodiment, for example, as shown in FIGS. 3A to 3D, the cylinder portion 17 with the upper end opening surface opened upward (see FIG. 3A). From above, the introduction path valve member 42 is attached to the lower end of the liquid introduction chamber 28 (see FIG. 3B). Next, the spring member 29 is mounted on the liquid introduction chamber 28 from above the cylinder portion 17 while being guided by the cylindrical guide wall 45 of the cylinder portion 17 and the insertion convex portion 42c of the introduction path valve member 42 (FIG. 3 ( c)). Further, the cylindrical piston member 15 is mounted on the spring member 29 from above the cylinder portion 17 while being guided by the cylindrical guide wall 45 of the cylinder portion 17 (see FIG. 3D). The process up to assembling the cylindrical piston member 15 with respect to 17 can be easily performed.

  Further, in the present embodiment, the foam discharger 10 is interposed between the pump head portion 19 and the cylindrical piston member 15 and moves up and down integrally therewith and is disposed above the air piston member 16. A cover body 11 having a generation function and an air valve function is provided. This eliminates the need to separately install a foam generating member and an air valve, so that the process up to assembling the pump head part 19 can also be performed by stacking and assembling the constituent members from above the cylinder part 17 in order. It becomes possible to simplify the assembly line and improve the productivity more effectively.

  That is, according to the present embodiment, for example, as shown in FIG. 3 (e) and FIGS. 4 (a) to 4 (e), after performing the process until the cylindrical piston member 15 is assembled to the cylinder portion 17. The air piston member 16 is mounted on the upper reduced diameter portion 15b of the cylindrical piston member 15 from above the cylinder portion 17 (see FIG. 3 (e)). Next, the ball valve 31a is mounted from above the cylinder portion 17 to a portion that becomes the mixing chamber 13 at the upper end portion of the cylindrical piston member 15 (see FIG. 4A). Next, the cover body 11 is mounted from above the cylinder portion 17 so that the upper diameter-reduced portion 15b of the cylindrical piston member 15 is fitted into the mounting joint portion 11b of the cover body 11 (see FIG. 4B). . Next, the auxiliary piston member 46 is mounted so as to be loosely fitted along the outer peripheral surface of the cover body 11 from above the cylinder portion 17 (see FIG. 4C). Next, the base cap part 14 is mounted from above the cylinder part 17 so as to cover the upper end opening surface thereof (see FIG. 4D). Further, the pump head portion 19 is mounted by fitting the upper fitting wall 11d of the cover body 11 into the hollow pipe 22 of the pump head portion 19 from above the cylinder portion 17 (see FIG. 4 (e)). The process until the pump head part 19 is assembled to the cylinder part 17 can also be easily performed.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, it is not always necessary to provide a cover body having a bubble generating function and an air valve function interposed between the pump head portion and the cylindrical piston member, and the outside air intake hole provided in the air piston member is a cover. It may be opened and closed by an air valve attached as a separate member from the body. In addition, the foam generating unit is not necessarily a molded mesh provided integrally formed on the top surface portion of the cover body, and other various foam generating members provided integrally with the cover body or separately. There may be. Further, the elastic valve portion of the introduction path valve member does not necessarily need to be composed of a spectacle-shaped leaf spring portion and a valve body portion, and other various elastically deformable elastic valves using a coil spring or the like, for example. May be part.

DESCRIPTION OF SYMBOLS 10 Foam discharge device 11 Cover body 12 Outside air intake hole 13 Mixing chamber 14 Base cap part 15 Cylindrical piston member 16 Air piston member 17 Cylinder part 18 Pump 19 Pump head part 21 Foaming flow path 22 Hollow pipe 23 Guide stem 24 Air chamber 28 Liquid introduction chamber 30 Liquid chamber 32 First flow path 33 Second flow path 40 Container body 41 Liquid introduction path 42 Introduction path valve member 42a Peripheral flange part 42b Elastic valve part 42c Insertion convex part 42d Base part 42e Leaf spring part 42f Valve body Part 43 Spring receiving step part 44 Valve seat part 45 Cylindrical guide wall 46 Auxiliary piston member

Claims (5)

A liquid that is attached to the neck of the container body via a cap portion and has a pump head portion that can be reciprocated with respect to the cap portion, and is pressurized by pressing the pump head portion. The first flow path for sending the content liquid from the chamber to the mixing chamber and the second flow path for sending air from the pressurized air chamber to the mixing chamber are opened, and the content liquid sent to the mixing chamber is A foam discharger for mixing and foaming with the air in a foaming flow path from a mixing chamber to a discharge port,
A cylinder part composed of the large-diameter air chamber and the small-diameter liquid introduction chamber disposed inside the mouth part of the container body, a cylindrical piston member that slides along the inner peripheral surface of the liquid introduction chamber, and A piston portion formed of an air piston member that projects radially outward from the cylindrical piston member and slides along the inner peripheral surface of the air chamber, and a liquid inlet provided at a lower end portion of the liquid introduction chamber An introduction passage valve member that opens and closes the passage; and a spring that is interposed between the lower end portion of the liquid introduction chamber and the lower end portion of the cylindrical piston member and biases the pump head portion that is pressed upward. With a member,
The lower end portion of the liquid introduction chamber is provided with a spring receiving step portion along the inner peripheral surface thereof, and a valve seat portion is provided below the spring receiving step portion,
The introduction path valve member includes a peripheral flange portion mounted on the spring receiving step portion in a state where the content liquid can flow, and the valve in a state where the peripheral flange portion is mounted on the spring receiving step portion. An elastic valve part closely contacting the seat part,
The lower end part of the said spring member is a foam discharger currently supported by the said spring receiving step part in the state which pinched | interposed the said peripheral flange part of the said introduction path valve member between the said spring receiving step part. A cover body having a bubble generating function and an air valve function, which is interposed between the pump head portion and the cylindrical piston member and moves up and down integrally therewith and is disposed above the air piston member. And
The air piston member is attached to the cylindrical piston member via a cylindrical portion loosely fitted to the outer peripheral surface of the cylindrical piston member,
The cover body includes a ceiling-mounted mounting joint having a foam generating portion provided on the top surface portion, and a valve plate portion provided in an annular shape projecting radially outward from a lower end portion of the mounting joint. The upper end portion of the cylindrical piston member is fitted and mounted inside the mounting joint, and the valve plate portion has a lower surface portion of an outside air intake hole formed in the air piston member. The foam discharge according to claim 1, wherein the foam discharge functions as an on-off valve that shuts off and opens the flow path of the outside air to the air chamber via the outside air intake hole by tightly and tightly contacting the outside contact surface. vessel. The foam discharger according to claim 2, wherein the foam generating portion provided on the top surface portion of the mounting joint portion of the cover body is a molded mesh provided integrally with the cover body and provided on the top surface portion. The spring member is not compressed and deformed, and is formed longer than the length of the liquid introduction chamber. The spring member extends upward from a joint portion of the liquid introduction chamber with the air chamber, and the liquid introduction chamber The cylindrical guide wall having an inner diameter similar to the inner diameter of the chamber is provided upright from the lower end of the liquid introduction chamber to a position higher than the length of the spring member. The foam discharger according to item. The said introduction path valve member is provided with the insertion convex part standingly arranged above the said peripheral flange part, and being inserted and arrange | positioned inside the said spring member. Foam dispenser.

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