JP2016132475A - Foam discharge tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foam discharge tool in which, a saprophyte is hardly generated in the foam discharge tool, and sanitation problem hardly occurs.SOLUTION: A foam discharge tool 1 of the invention is configured so that, when a pump head part 3 is pressed, a content fluid 82 containing an antibacterial agent, and air are mixed, and foam is produced, then the foam is discharged. In a resting state, a lower end of a tight-contact slide part 513 forming a cylindrical piston member 51 is disposed with an interval d with a liquid introduction chamber 16 of a cylinder part 4, and an air chamber 12 of the cylinder part 4 and the liquid introduction chamber 16 communicate. In a period since the pump head part 3 is pressed, then the pump head part 3 is lowered, then pressing force is released, until a state returns to the resting state, the tight-contact slide part 513 forming the cylindrical piston member 51 slides and tightly contacts, along an inner peripheral face of the liquid introduction chamber 16, and the air chamber 12 of the cylinder part 4 and the liquid introduction chamber 16 are partitioned.SELECTED DRAWING: Figure 1

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 agent or hair preparation and pressing the pump head part with the container placed, the content liquid is made foamy without the user performing stirring etc. Various foam dischargers such as pump former containers that are discharged in the past have been developed. For example, the foam dispenser described in Patent Document 1 is a container in which a foam dispenser that discharges the liquid in a foam form by mixing the content liquid with air is attached to the mouth of the container body. The foam dispenser included in the foam dispenser described in Patent Document 1 includes a piston (liquid piston) that sucks, pressurizes, and discharges the content liquid on a base cap part that is attached to the mouth part of the container body, and air. There is provided a pump composed of a single cylinder portion in which pistons (air pistons) that perform suction, pressurization, and discharge are incorporated in a concentric series arrangement. The foam discharge device described in Patent Document 1 operates each piston of the pump by pushing a pump head portion protruding above the base cap portion, and pressurizes and discharges the content liquid and air in the cylinder portion, respectively. Then, they are mixed with each other and passed through a foam generating member such as a mesh ring to form a foam, and the content liquid can be discharged to the outside.

JP 2005-262202 A

  Since foam dischargers such as pump former containers are often used around water such as bathrooms and washstands, they often get wet with water. Especially in the bathroom, water such as a shower may be applied directly to the container. Furthermore, since the pump head part is often pushed with a wet hand, the periphery of the pump head part often gets wet with water. And the bubble discharge device of patent document 1 was provided in the cylindrical wall which comprises an air piston by the air piston valve separate from the member which comprises an air piston as a suction valve of the outside air in an air piston. The outside air is sucked by opening the outside air introduction hole. Therefore, when the outside air is sucked, water around the pump head part and the base cap part may be sucked into the cylinder part inside the base cap part through the outside air introduction hole. Thus, when water is sucked into the cylinder part, it is considered that various germs may be generated in the bubble discharger or the water may be spoiled, which may cause a sanitary problem.

  Therefore, this invention is providing the foam discharger which can eliminate the fault which the prior art mentioned above has.

  The present invention has a pump head portion which is provided so as to be able to reciprocate with respect to a base cap portion which is attached to a mouth portion of a container body containing a content liquid containing an antibacterial agent, and the pump head portion is pressed. A first flow path for sending the content liquid from the pressurized liquid chamber to the mixing chamber downstream of the liquid chamber, and from the pressurized air chamber to the mixing chamber downstream of the air chamber. A foam discharger that communicates with a second flow path for sending air and that mixes and foams the content liquid sent to the mixing chamber with the air in the mixing chamber; A cylinder part having the large-diameter air chamber disposed inside the neck and a small-diameter liquid introduction chamber that hangs down at the center of the air chamber and introduces the content liquid into the liquid chamber; And a cylindrical piston member that moves up and down in the chamber over the liquid introduction chamber, and the cylindrical piston member A piston portion having a sliding piston member that protrudes outward in the direction and slides along the inner peripheral surface of the air chamber, and the cylindrical piston member of the piston portion is the air of the cylinder portion. An outer cylindrical portion extending to a lower portion of the chamber, an inner cylindrical portion disposed inside the outer cylindrical portion and extending beyond a lower end portion of the outer cylindrical portion, and a circumferential direction from the lower end portion of the inner cylindrical portion In the state where the pump head portion is not pressed, the lower end of the close contact sliding portion constituting the cylindrical piston member is the liquid of the cylinder portion. The pump head portion is arranged after being spaced from the introduction chamber, and the air chamber of the cylinder portion and the liquid introduction chamber communicate with each other, and the pump head portion starts to descend by pressing the pump head portion. The pressure on the Until the head portion returns to the state before being pressed, the tight sliding portion constituting the cylindrical piston member slides along the inner peripheral surface of the liquid introduction chamber of the cylinder portion. The bubble discharger which moves and the said air chamber and the said liquid introduction chamber of the said cylinder part are parting is provided.

  According to the foam dispenser of the present invention, it is difficult for germs to occur in the foam dispenser, and it is difficult for hygienic problems to occur.

FIG. 1 is a cross-sectional view of a stationary state before a foam discharger according to a preferred embodiment of the present invention is attached to a container body and a pump head portion is pressed. FIG. 2 is a cross-sectional view of a state immediately after starting to press the pump head portion according to a preferred embodiment of the present invention. FIG. 3 is a cross-sectional view of the pump head portion pressed to the end according to a preferred embodiment of the present invention. FIG. 4 is a cross-sectional view of a state immediately after releasing the pressure of the pump head portion according to a preferred embodiment of the present invention.

Hereinafter, the foam discharger of the present invention will be described based on a preferred embodiment thereof with reference to FIGS.
A foam discharger 1 (hereinafter also referred to as “this embodiment”) according to a preferred embodiment of the present invention is a pump former used by being attached to a so-called pump former container, and is similar to a conventional pump former. In addition, it is attached to the neck portion 81 of the container body 8 and has a function of discharging the content liquid 82 and air into a foam by mixing. As shown in FIG. 1, the foam dispenser 1 of the present embodiment is capable of reciprocating with respect to the base cap portion 2 attached to the mouth portion 81 of the container body 8 containing the content liquid 82 containing the antibacterial agent. A first flow which has a pump head portion 3 provided and sends the content liquid 82 from the pressurized liquid chamber 11 to the mixing chamber 13 on the downstream side of the liquid chamber 11 when the pump head portion 3 is pressed. The passage 14 and the second flow path 15 that sends air from the pressurized air chamber 12 to the mixing chamber 13 on the downstream side of the air chamber 12 communicate with each other, and the content liquid 82 sent to the mixing chamber 13 is mixed with the mixing chamber 13. It is the foam discharger 1 which mixes with the said air and foams and discharges. Here, the liquid chamber 11 is a portion that pushes out the introduced content liquid 82 to the downstream side when the content liquid 82 is introduced and pressurized. The air chamber 12 is a portion that pushes out the introduced air to the downstream side when air is introduced and pressurized.

  As shown in FIG. 1, the foam discharger 1 according to the present embodiment hangs down in a large-diameter air chamber 12 and a central portion of the air chamber 12 that are disposed inside the mouth neck portion 81 of the container body 8, A cylindrical piston member 51 and a cylindrical piston member 51 that move up and down in the cylinder section 4 having the small diameter liquid introduction chamber 16 for introducing the content liquid 82 into the liquid chamber 11, the air chamber 12, and the liquid introduction chamber 16. And a sliding piston member 52 that is provided so as to project outward in the radial direction and slide along the inner peripheral surface of the air chamber 12. The foam discharger 1 according to the present embodiment has a pump 6 including a single cylinder portion 4 in which a cylindrical piston member 51 and a sliding piston member 52 are arranged concentrically and arranged in a straight line. ing. The cylindrical piston member 51 and the sliding piston member 52 of the pump 6 are actuated by pushing the pump head portion 3 protruding above the base cap portion 2, and the content liquid 82 and air are pressurized in the cylinder portion 4. These are discharged and mixed in the mixing chamber 13 provided as a confluence space on the downstream side, which is the pump output side, and foamed by the foam generating member 18 and discharged from the discharge port 31 of the pump head unit 3 to the outside. Is.

  In the present embodiment, the base cap portion 2 includes an annular ceiling portion 21 and a cylindrical guide stem 22 erected upward from the upper surface of the ceiling portion 21 as shown in FIG. On the inner surface of the cylindrical peripheral wall that hangs downward from the entire outer peripheral edge of the ceiling portion 21, a screw groove that is screwed with a screw provided on the outer periphery of the mouth portion 81 of the container body 8 is provided. The pump head portion 3 is attached to the neck portion 81 of the container body 8 by the base cap portion 2 formed in this way.

  In this embodiment, as shown in FIG. 1, the pump head portion 3 has a cylindrical hollow pipe 33 that is inserted into the guide stem 22 of the base cap portion 2 so as to be relatively displaceable. 3 is provided with a discharge port 31 for discharging the foamed content liquid. Inside the hollow pipe 33, a foam channel 32 reaching the discharge port 31 is formed. The foaming flow path 32 is provided with a mixing chamber 13 for mixing the air and the content liquid 82, and a foam generating member 18 for making the mixed liquid foam on the downstream side of the mixing chamber 13.

  In the present embodiment, as shown in FIG. 1, the pump head portion 3 is connected to the lower end portion of the hollow pipe 33 via a cylindrical piston member 51 in which an upper portion is fitted and integrally connected as described later. The spring member 91 provided in the liquid introduction chamber 16 of the cylinder part 4 is biased upward. The connecting portion between the hollow pipe 33 and the cylindrical piston member 51 and the configuration of the cylindrical piston member 51 will be described in detail later.

  In this embodiment, as shown in FIG. 1, the cylinder portion 4 is inside the peripheral wall of the ceiling portion 21 of the base cap portion 2 and is integrated with the lower surface of the ceiling portion 21 via a flange. It is formed to hang down into the container body 8. The upper portion of the cylinder portion 4 is a large-diameter air chamber 12, and a portion of the central portion of the air chamber 12 that hangs from the bottom of the air chamber 12 to the vicinity of the bottom of the container body 8 is contained in the liquid chamber 11. A small-diameter liquid introduction chamber 16 for introducing the liquid 82 is formed.

In the stationary state shown in FIG. 1, the piston portion 5 has a cylindrical piston member 51 disposed over the air chamber 12 and projects radially outward from the cylindrical piston member 51 to the inner peripheral surface of the air chamber 12. And a slidable piston member 52.
In the present embodiment, the cylindrical piston member 51 constituting the piston portion 5 sucks the content liquid 82 in the container body 8 into the liquid chamber 11 formed inside the cylindrical piston member 51 and adds the liquid 82 in the liquid chamber 11. Pressure is discharged from the liquid chamber 11 to the mixing chamber 13. The cylindrical piston member 51 includes an outer cylindrical portion 511 that extends to a lower portion of the air chamber 12 of the cylinder portion 4 and an inner side that is disposed inside the outer cylindrical portion 511 and extends beyond the lower end portion of the outer cylindrical portion 511. It has a cylindrical portion 512 and a close-contact sliding portion 513 that protrudes outward in the circumferential direction from the lower end portion of the inner cylindrical portion 512. Specifically, in the stationary state shown in FIG. 1, the outer cylindrical portion 511 arranged from the lower portion of the hollow pipe 33 to the lower portion of the air chamber 12 of the cylinder portion 4, and the lower portion of the outer cylindrical portion 511 An inner cylindrical portion 512 that extends to the bottom of the air chamber 12 (near the boundary between the air chamber 12 and the liquid introduction chamber 16) beyond the lower end of the outer cylindrical portion 511, and the lower end of the inner cylindrical portion 512 And a close contact sliding portion 513 that protrudes outward from the portion in the circumferential direction (X direction) to a position corresponding to the inner peripheral surface of the liquid introduction chamber 16. The cylindrical piston member 51 is integrally connected by fitting the upper end portion of the outer cylindrical portion 511 into the lower portion of the hollow pipe 33 of the pump head portion 3, and the inner peripheral surface of the lower portion of the outer cylindrical portion 511 and the inner cylindrical portion 512. And the outer peripheral surface of the upper part of the two are integrally connected and formed.

  Here, as described above, the lower part of the hollow pipe 33 constituting the pump head part 3 and the upper end part of the outer cylindrical part 511 of the cylindrical piston member 51 constituting the piston part 5 are fitted and integrated. In this embodiment, as shown in FIG. 1, a part of the inner peripheral surface of the hollow pipe 33 or a part of the outer peripheral surface of the outer cylindrical portion 511 of the cylindrical piston member 51 is connected in the present embodiment. In addition, a plurality of convex ribs extending in the vertical direction are formed in the circumferential direction. The gap between the plurality of convex ribs becomes a part of the second flow path 15 that is an air passage.

  Since the cylindrical piston member 51 is configured as described above, the cylindrical piston member 51 including the outer cylindrical portion 511, the inner cylindrical portion 512, and the close contact sliding portion 513, and the hollow pipe 33 of the pump head portion 3 are , Move up and down as a unit. As shown in FIG. 1, the outer diameter of the lower portion of the outer cylindrical portion 511 is smaller than the inner diameter of the liquid introduction chamber 16 of the cylinder portion 4. Further, the close sliding portion 513 at the lower end of the inner cylindrical portion 512 is a member that plays a role of supporting the spring member 91 while sliding along the inner peripheral surface of the liquid introduction chamber 16.

  In the present embodiment, as shown in FIG. 1, a liquid chamber 11 is formed inside an intermediate portion in the vertical direction of the outer cylindrical portion 511 constituting the cylindrical piston member 51, and the liquid chamber 11 and the pump head portion are formed. Between the three mixing chambers 13, a ball valve 92 is arranged. A spring member 91 is disposed in the liquid introduction chamber 16 of the cylinder portion 4 below the contact sliding portion 513 constituting the cylindrical piston member 51. Further, a poppet valve 93 extending in the vertical direction of the liquid introduction chamber 16 is disposed inside the spring member 91 and inside the inner cylindrical portion 512 constituting the cylindrical piston member 51.

  In this embodiment, a plurality of ribs (not shown) are provided in the circumferential direction on the inner peripheral surface of the inner cylindrical portion 512 of the cylindrical piston member 51 (on the liquid chamber 11 side). The upper part of the valve 93 is lightly fitted and integrated. As shown in FIG. 2, the light fitting means that the cylindrical piston member 51 and the poppet valve 93 integrally move downward immediately after the pump head portion 3 starts to be pressed, and the lower end portion of the poppet valve 93 is moved downward. When the inlet channel 19 is closed by contacting the inner wall of the liquid inlet chamber 16, only the cylindrical piston member 51 moves downward until the state shown in FIG. 3, and as shown in FIG. When the pressure of 3 is released, the cylindrical piston member 51 and the poppet valve 93 again come into contact with each other so as to move upward.

  In the present embodiment, as shown in FIG. 1, on the outer peripheral surface of the outer cylindrical portion 511 of the cylindrical piston member 51, below the portion where the piston cylindrical portion 521 of the sliding piston member 52 described later is mounted, A closing concave rib 514 that opens and closes the second flow path 15 that is an air flow path is provided. The closing concave rib 514 protrudes outward in the circumferential direction from the outer peripheral surface of the outer cylindrical portion 511 and is provided in an annular shape along the outer peripheral surface. By inserting the lower end portion of the piston cylindrical portion 521 of the sliding piston member 52 into contact with the closing concave rib 514 of the cylindrical piston member 51, the second flow channel 15 that is an air flow channel is connected to the inlet thereof. It becomes possible to occlude the part.

  The foam discharge device 1 including the cylindrical piston member 51 configured as described above is in close contact with the cylindrical piston member 51 in a state where the pump head portion 3 is not pressed, that is, in a stationary state illustrated in FIG. The lower end of the sliding portion 513 is disposed above the liquid introduction chamber 16 of the cylinder portion 4 with a gap d, and the air chamber 12 and the liquid introduction chamber 16 of the cylinder portion 4 communicate with each other. The foam discharger 1 is in a state before the pump head part 3 is pressed after the pump head part 3 is released after the pump head part 3 starts to descend by pressing the pump head part 3 (FIG. 1). In the period until the state is restored (between FIGS. 2 to 4), the close contact sliding portion 513 constituting the cylindrical piston member 51 extends along the inner peripheral surface of the liquid introduction chamber 16 of the cylinder portion 4. The air chamber 12 and the liquid introduction chamber 16 of the cylinder portion 4 are separated from each other. That is, the distance d is formed in the stationary state shown in FIG. 1 where the pump head portion 3 is not pressed, but after the pump head portion 3 is pressed, the pressure is released and the state shown in FIG. It is not formed until just before returning. In the stationary state shown in FIG. 1, the distance d is preferably about 1 mm to 3 mm. Here, the interval d refers to the large-diameter air chamber 12 positioned above the liquid introduction chamber 16 and the small-diameter liquid introduction chamber 16 depending on the center of the air chamber 12 in the stationary state shown in FIG. The shortest distance between the inner bottom wall of the reduced diameter connecting portion 17 and the lower end of the close contact sliding portion 513 constituting the cylindrical piston member 51.

  Next, the sliding piston member 52 constituting the piston part 5 sucks the outside air and the content liquid 82 in the container body 8 into the air chamber 12 of the cylinder part 4 and pressurizes the air chamber 12 in the present embodiment. Thus, air is discharged from the air chamber 12 to the mixing chamber 13. In this embodiment, the sliding piston member 52 is relatively displaced with a clearance of about 0.1 to 0.2 mm on the outer peripheral surface of the outer cylindrical portion 511 of the cylindrical piston member 51, as shown in FIG. A piston cylindrical portion 521 that can be loosely fitted, a projecting portion 522 that projects outwardly from the outer peripheral surface of the piston cylindrical portion 521, and an outer peripheral tip of the projecting portion 522. It comprises an outer peripheral piston portion 523 having an outer peripheral surface that is slidably in contact with the inner peripheral surface of the air chamber 12 in a close contact state. Note that a gap between the outer peripheral surface of the outer cylindrical portion 511 of the cylindrical piston member 51 and the inner peripheral surface of the piston cylindrical portion 521 of the sliding piston member 52 is a part of the second flow path 15 that is an air passage. Become. The projecting portion 522 further includes an annular flat plate portion 522a projecting outward from the joint base end portion with the piston cylindrical portion 521, and an annular outer side that is joined downwardly from the outer peripheral edge portion of the annular flat plate portion 522a. It includes a wall 522b and an outer annular flat plate portion 522c projecting radially outward from the lower end of the annular outer wall 522b. An outer peripheral piston portion 523 extends from the outer peripheral edge portion of the outer annular flat plate portion 522c.

  Moreover, in the foam discharger 1 of this embodiment, the check valve 7 which can take in external air is provided in the air chamber 12 of the cylinder part 4, as shown in FIG. More specifically, the sliding piston member 52 has an outside air intake hole 524 that penetrates the air chamber 12. In this embodiment, the outside air intake hole 524 is provided in the annular flat plate portion 522 a of the overhang portion 522 that constitutes the sliding piston member 52. Further, an air valve 71 is provided in the air chamber 12 so as to cover the outside air intake hole 524 from below. The air valve 71 is used as the check valve 7, and when the air chamber 12 becomes negative pressure due to the rising of the sliding piston member 52 to generate a suction force, the air valve 71 is opened by the suction force and the outside air is taken in. Outside air that has passed through the gap between the hollow pipe 33 of the pump head portion 3 and the guide stem 22 of the base cap portion 2 is taken into the air chamber 12 through the hole 524. That is, the air valve 71 which is the check valve 7 is in the position before the pump head unit 3 is lifted and the pump head unit 3 is lifted and pressed, in other words, in the stationary state shown in FIG. When returning, the inside of the air chamber 12 is opened due to a negative pressure, so that the outside air can be taken into the air chamber 12.

  The air chamber 12 that has taken in the outside air in this way has a gap d between the lower end of the close contact sliding portion 513 constituting the cylindrical piston member 51 and the liquid introduction chamber 16 in the stationary state shown in FIG. It is supposed to be formed. Therefore, as the sliding piston member 52 rises, the air chamber 12 becomes negative pressure and generates a suction force, and the content is passed through the interval d formed immediately before returning to the position before the pump head portion 3 is pressed. The liquid 82 is taken into the reduced diameter connecting portion 17 between the air chamber 12 and the liquid introducing chamber 16. In the stationary state shown in FIG. 1, the air chamber 12 and the liquid introduction chamber 16 of the cylinder portion 4 communicate with each other by the interval d, and the content liquid 82 and the liquid introduction chamber 16 taken into the reduced diameter connecting portion 17. The content liquid 82 inside can be mixed.

  In addition, as shown in FIG. 1, the foam discharger 1 of this embodiment has a skirt-like cover 34 disposed concentrically with the hollow pipe 33 outside the hollow pipe 33 of the pump head portion 3. 33 and a gap between the guide cap 22 of the base cap portion 2 is provided. By providing the skirt-shaped cover 34, when the outside air is sucked through the gap between the hollow pipe 33 and the guide stem 22, the pump head together with the outside air is sucked from the gap as the outside air is sucked. The water around the part 3 and the base cap part 2 can be considerably prevented from flowing into the air chamber 12.

  Further, as shown in FIG. 1, the foam discharger 1 of the present embodiment is provided with a ventilation port 121 communicating with the inside of the container body 8 on the peripheral surface of the air chamber 12 of the cylinder portion 4. The ventilation port 121 is formed by an outer peripheral piston portion 523 that slides along the inner peripheral surface of the air chamber 12 of the cylinder portion 4 in the sliding piston member 52 when the pump head portion 3 is not pressed (when not pressed). The air chamber 12 is covered from the inside. By providing the ventilation port 121 on the peripheral surface of the air chamber 12, when the pump head unit 3 is pressed, outside air is sent to the container body 8 through the ventilation port 121, so that the inside of the container body 8 It can be effectively avoided that the content liquid 82 is reduced and the container body 8 contracts and deforms. Further, when the pump head portion 3 is not pressed (when not pressed), the ventilation port 121 is covered and closed by the outer peripheral piston portion 523 of the sliding piston member 52, for example, the pump former container It is possible to effectively prevent the content liquid 82 from flowing into the air chamber 12 from the container main body 8 through the ventilation port 121 when the container falls over when not in use.

  Examples of the antibacterial agent contained in the content liquid 82 in the container body 8 include isopropyl methylphenol benzoate and triclosan. As an antibacterial agent, it can be used 1 type selected from these, or 2 or more types in combination.

  The foam dispenser 1 according to the present embodiment configured as described above is configured so that when the pump head unit 3 is released and the pump head unit 3 returns to the position before the pump head unit 3 is pressed, Due to the negative pressure, the check valve 7 is opened and the outside air is taken into the air chamber 12. In addition, the foam discharger 1 of the present embodiment sends air from the air chamber 12 to the mixing chamber 13 via the second flow path 15 and presses the first from the liquid chamber 11 when the pump head portion 3 is pressed. The content liquid 82 is sent to the mixing chamber 13 through the flow path 14. Hereinafter, the flow in which the mixed liquid in the form of foam is discharged from the discharge port 31 by specifically pressing and releasing the pump head portion 3 will be described with reference to FIGS.

  In the present embodiment, the pump head unit 3 shown in FIG. 1 is pressed and pressed downward against the biasing force of the spring member 91 from the state before pressing (when not pressed). Then, the outer cylindrical portion 511 of the cylindrical piston member 51 and the piston cylindrical portion 521 of the sliding piston member 52 are mounted in a loosely fitted state, and the outer peripheral piston portion 523 of the sliding piston member 52 and the cylinder portion 4 are Since the resistance of the contact force with the inner peripheral surface of the air chamber 12 is larger than the resistance between the outer cylindrical portion 511 and the piston cylindrical portion 521, first, as shown in FIG. The cylindrical piston member 51 of the piston part 5 together with the hollow pipe 33 of the pump head part 3 slides downward relative to the sliding piston member 52 of the piston part 5. Accordingly, the lower end portion of the piston cylindrical portion 521 of the sliding piston member 52 is separated from the closing concave rib 514 of the cylindrical piston member 51, and the lower end portion of the piston cylindrical portion 521 and the cylindrical piston member 51 are closed. Since the close contact state with the concave rib 514 is released, a plurality of convex ribs formed on the connecting portion between the hollow pipe 33 constituting the pump head portion 3 and the outer cylindrical portion 511 of the cylindrical piston member 51, and the cylinder It becomes a state in which air can be circulated through the second flow path 15 formed by the clearance between the outer cylindrical portion 511 of the piston member 51 and the piston cylindrical portion 521 of the sliding piston member 52. As shown in FIG. 2, the lower end portion of the poppet valve 93 comes into contact with the inner wall of the liquid introduction chamber 16 and the introduction flow path 19 is closed.

  Further, in this embodiment, as shown in FIG. 2, the lower end of the close contact sliding portion 513 constituting the cylindrical piston member 51 and the inner peripheral surface of the liquid introduction chamber 16 come into contact with each other, the interval d disappears, and the cylinder The air chamber 12 and the liquid introduction chamber 16 of the part 4 are divided.

  Next, as shown in FIG. 3, if the pump head portion 3 is further pressed down and pushed down, the cylindrical piston member 51 and the sliding piston member 52 of the piston portion 5 together with the hollow pipe 33 of the pump head portion 3. However, it will be pushed down as a whole. Thereby, the air in the air chamber 12 of the cylinder part 4 is discharged toward the foaming flow path 32 arranged in the hollow pipe 33 of the pump head part 3 through the second flow path 15.

  Further, as shown in FIG. 3, the close sliding portion 513 constituting the cylindrical piston member 51 extends along the inner peripheral surface of the liquid introduction chamber 16 while the poppet valve 93 that closes the introduction flow path 19 remains. The cylindrical piston member 51 and the sliding piston member 52 of the piston portion 5 together with the hollow pipe 33 of the pump head portion 3 are pushed downward. As a result, the liquid pressure of the content liquid 82 in the liquid chamber 11 formed inside the outer cylindrical portion 511 of the cylindrical piston member 51 is increased, the ball valve 92 moves upward, and the first flow path 14 is Communicated. Then, the content liquid 82 in the liquid chamber 11 is pressurized and discharged toward the foaming flow path 32 in the hollow pipe 33 through the first flow path 14.

  The discharged content liquid 82 and air are pressure-mixed in the mixing chamber 13 disposed in the hollow pipe 33 of the pump head portion 3, and the pressure-mixed mixed liquid passes through the foam generating member 18. After being foamed, it is discharged from the discharge port 31 of the pump head portion 3 in the form of foam.

  As shown in FIG. 3, the pump head portion 3 is in contact with the upper end portion of the guide stem 22 of the base cap portion 2, and the outer peripheral piston portion 523 of the sliding piston member 52 constituting the piston portion 5 is the air of the cylinder portion 4. It is pressed until it reaches the vicinity of the bottom of the chamber 12, that is, until the end of one stroke.

  As shown in FIG. 3, when the pump head part 3 is pressed to the end, the pressure of the pump head part 3 is released. When the pressure of the pump head portion 3 is released, the piston cylindrical portion 521 of the sliding piston member 52 and the outer cylindrical portion 511 of the cylindrical piston member 51 are mounted in a loosely fitted state. Furthermore, the cylindrical piston member 51 of the piston part 5 together with the hollow pipe 33 of the pump head part 3 slides upward relative to the sliding piston member 52 of the piston part 5 by the biasing force of the spring member 91. . Accordingly, the closing concave rib 514 of the cylindrical piston member 51 moves upward with respect to the sliding piston member 52, so that the lower end portion of the piston cylindrical portion 521 of the sliding piston member 52 is moved to the cylindrical piston. Close contact with the concave portion of the closing concave rib 514 of the member 51, thereby blocking the air flow through the second flow path 15. Further, when the ball valve 92 moves downward by its own weight, the liquid chamber 11 inside the outer cylindrical portion 511 of the cylindrical piston member 51 constituting the piston portion 5 is closed.

  Thereafter, the urging force of the spring member 91 pushes the pump head portion 3 upward and returns, and the cylindrical piston member 51 and the sliding piston member 52 are also pushed up. As a result, the liquid chamber 11 inside the cylindrical piston member 51 constituting the piston portion 5 becomes negative pressure, so that the poppet valve 93 disposed inside the liquid introduction chamber 16 of the cylinder portion 4 moves upward. As the poppet valve 93 moves upward in this way, the introduction flow path 19 is communicated, and the content liquid 82 in the container body 8 passes through the suction pipe 94 disposed in the lower part of the liquid introduction chamber 16. The liquid is introduced into the liquid introduction chamber 16 by suction. Since the tight sliding portion 513 constituting the cylindrical piston member 51 is in contact with the inner peripheral surface of the liquid introduction chamber 16, the air chamber 12 and the liquid introduction chamber 16 of the cylinder portion 4 remain separated. State.

  Further, the pump head part 3 is pushed upward to return to the original position (position in the stationary state shown in FIG. 1), and the cylindrical piston member 51 and the sliding piston member 52 are also pushed up. When the air chamber 12 becomes negative pressure and the air valve 71 provided in the air chamber 12 is opened, the outside air intake hole 524 provided in the annular flat plate portion 522 a of the overhang portion 522 constituting the sliding piston member 52. The outside air is taken into the air chamber 12 via.

  In addition, by appropriately selecting the material, dimensions and shape of the air valve 71 provided in the air chamber 12 and adjusting the rigidity and elastic force of the air valve 71, the air valve 71 is always urged in the closing direction by its own elastic force. The air valve 71 is not opened until the air chamber 12 reaches a certain negative pressure.

  In addition, when the pump head unit 3 is pushed upward and returned to the original position (the stationary state shown in FIG. 1), the air valve 71 is closed and the negative pressure state of the air chamber 12 is maintained. .

  Here, in the stationary state shown in FIG. 1, the air chamber 12 of the foam discharger 1 of the present embodiment is located between the lower end of the close sliding portion 513 constituting the cylindrical piston member 51 and the liquid introduction chamber 16. , A distance d is formed. Therefore, when the sliding piston member 52 rises, the air chamber 12 of the cylinder portion 4 becomes a negative pressure, so that the content liquid 82 in the container body 8 passes through the communicating introduction flow path 19 and the pump head portion. 3 is taken into the reduced-diameter connecting portion 17 between the air chamber 12 and the liquid introduction chamber 16 through the interval d formed immediately before returning to the position before the pressure 3 is pressed. Thus, even if the content liquid 82 is taken into the reduced diameter connecting portion 17 through the gap d, the gap d is open in the stationary state shown in FIG. Since the chamber 12 and the liquid introduction chamber 16 communicate with each other, the content liquid 82 taken into the reduced diameter connecting portion 17 and the content liquid 82 in the liquid introduction chamber 16 can be mixed.

  By repeating the operation as described above, the liquid mixture of the content liquid 82 and air is discharged from the discharge port 31 of the pump head unit 3 to the outside for each stroke of the pump head unit 3. The

The effect at the time of using the foam discharger 1 of one Embodiment of this invention mentioned above is demonstrated.
In the foam discharge device 1 according to the present embodiment, in the stationary state shown in FIG. 1, a gap d is formed between the lower end of the contact sliding portion 513 constituting the cylindrical piston member 51 and the liquid introduction chamber 16. It is like that. Therefore, when the pressure of the pump head 3 is released from the state shown in FIG. 4 and the pump head 3 returns to the original position (the stationary position shown in FIG. 1), the air chamber of the cylinder 4 When the check valve 7 is opened by the negative pressure inside the air chamber 12 and the outside air is taken into the air chamber 12 through the outside air intake hole 524, the pump head portion 3 or the base cap portion 2 The water attached to the periphery may be sucked into the air chamber 12 of the cylinder part 4 together with the outside air. Thus, even if water is sucked into the air chamber 12 of the cylinder portion 4 together with the outside air, the inside of the air chamber 12 is in a state where the interval d is open, and the air chamber 12 of the cylinder portion 4 And the liquid introduction chamber 16 communicate with each other, so that the content liquid 82 taken into the reduced diameter connecting portion 17 between the air chamber 12 and the liquid introduction chamber 16 and the content liquid 82 in the liquid introduction chamber 16 are mixed. It is possible. As described above, since the content liquid 82 containing the antibacterial agent is taken into the air chamber 12, the water in the cylinder portion 4 is not easily spoiled, and it is difficult for germs to be generated in the foam dispenser 1. It is difficult to cause a problem. Moreover, since the foam dispenser 1 of this embodiment uses the content liquid 82 in the container main body 8 so that a hygienic problem does not easily occur, the configuration becomes simple. When the configuration is simplified as described above, the productivity of the foam discharger 1 is improved.

  Incidentally, the water sucked into the air chamber 12 of the cylinder part 4 together with the outside air is finally discharged from the discharge port 31 of the pump head part 3 by repeatedly pressing and releasing the pump head part 3. Then, it is discharged together with the mixed liquid in the form of foam.

  The foam dispenser of the present invention is not limited to the foam dispenser 1 of the above-described embodiment, and can be appropriately changed.

  For example, in the foam discharger 1 of the present embodiment, as shown in FIG. 1, the lower end of the close contact sliding portion 513 is arranged above the liquid introduction chamber 16 of the cylinder portion 4 with a gap d. In the present specification, “the lower end of the close contact sliding portion 513 is arranged at a distance d from the liquid introduction chamber 16 of the cylinder portion 4” means that the lower end of the close contact slide portion 513 is as described above. In addition to the configuration in which the interval d is provided above the liquid introduction chamber 16 of the cylinder portion 4, a groove is provided on the inner peripheral surface of the upper portion of the liquid introduction chamber 16 in the stationary state shown in FIG. Is also included.

  Moreover, in the foam discharger 1 of this embodiment, as shown in FIG. 1, the pump head part 3 is urged | biased upwards by the effect | action of the spring member 91 provided in the liquid introduction chamber 16 of the cylinder part 4. As shown in FIG. However, the spring member 91 does not have to be provided in the liquid introduction chamber 16. For example, the spring member 91 is formed on the cylindrical guide stem 22 of the base cap portion 2 so as to surround the hollow pipe 33 of the pump head portion 3. You may provide in upper part.

  Further, in the foam discharger 1 of the present embodiment, as shown in FIG. 1, the outside air intake hole 524 is provided in the annular flat plate portion 522 a of the overhang portion 522 constituting the sliding piston member 52. It is not necessary to provide the flat plate portion 522a.

DESCRIPTION OF SYMBOLS 1 Foam discharge device 11 Liquid chamber 12 Air chamber 121 Ventilation port 13 Mixing chamber 14 1st flow path 15 2nd flow path 16 Liquid introduction chamber 17 Reduction diameter connection part 18 Foam generation member 19 Introduction flow path 2 Base cap part 21 Top position Part 22 Guide stem 3 Pump head part 31 Discharge port 32 Foam flow path 33 Hollow pipe 34 Skirt-like cover 4 Cylinder part 5 Piston part 51 Cylindrical piston member 511 Outer cylindrical part 512 Inner cylindrical part 513 Closed sliding part 514 Concave concave part Rib 52 Sliding piston member 521 Piston cylindrical part 522 Overhang part 522a Annular flat plate part 522b Annular outer wall 522c Outer annular flat plate part 523 Outer piston part 524 Outside air intake hole 6 Pump 7 Check valve 71 Air valve 8 Container body 81 Neck part 82 Contents liquid 91 Spring member 92 Ball valve 93 Poppet valve 94 Pull tube d interval

Claims (4)

By having a pump head portion that is reciprocally movable with respect to a base cap portion that is attached to the mouth portion of a container body containing a content liquid containing an antibacterial agent, and the pump head portion is pressed, A first flow path for sending the content liquid from the pressurized liquid chamber to the mixing chamber downstream of the liquid chamber; and a first flow path for sending air from the pressurized air chamber to the mixing chamber downstream of the air chamber. A foam dispenser that communicates with two flow paths and mixes and foams the content liquid sent to the mixing chamber with the air in the mixing chamber;
A cylinder having a large-diameter air chamber and a small-diameter liquid introduction chamber that hangs down at the center of the air chamber and introduces the content liquid into the liquid chamber, which is disposed inside the mouth neck of the container body. A cylindrical piston member that moves up and down in the chamber, the air chamber, and the liquid introduction chamber, and extends radially outward from the cylindrical piston member and slides along the inner peripheral surface of the air chamber A piston portion having a sliding piston member that
The cylindrical piston member of the piston portion includes an outer cylindrical portion that extends to a lower portion of the air chamber of the cylinder portion, and an inner cylindrical portion of the outer cylindrical portion that extends beyond the lower end portion of the outer cylindrical portion. An inner cylindrical portion, and a close sliding portion projecting outward in the circumferential direction from the lower end portion of the inner cylindrical portion,
In a state in which the pump head portion is not pressed, a lower end of the contact sliding portion constituting the cylindrical piston member is arranged with a space from the liquid introduction chamber of the cylinder portion, The air chamber communicates with the liquid introduction chamber,
In the period from when the pump head part is pressed and the pump head part starts to descend until the pump head part is released and returned to the state before the pump head part is pressed, The close-contact sliding portion constituting the piston member slides in close contact along the inner peripheral surface of the liquid introduction chamber of the cylinder portion, and the air chamber and the liquid introduction chamber of the cylinder portion are divided. Foam dispenser. The air chamber of the cylinder part is provided with a check valve that can take in outside air,
When the pressure of the pump head part is released and the pump head part returns to the position before the pressure is pressed, the check valve opens to the inside by the negative pressure inside the air chamber. The foam dispenser according to claim 1, which takes in outside air.   When the pump head portion is pressed, air is sent from the air chamber to the mixing chamber through the second flow path, and from the liquid chamber to the mixing flow path to the mixing chamber. The foam dispenser according to claim 1 or 2, wherein the content liquid is fed. A ventilation port communicating with the inside of the container body is provided on the peripheral surface of the air chamber,
The ventilation port is covered from the inside of the air chamber by an outer peripheral piston portion that slides along an inner peripheral surface of the air chamber in the sliding piston member in a state where the pump head portion is not pressed. The foam discharger according to any one of claims 1 to 3.

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