JP2019119472A - Foam dispenser - Google Patents

Abstract

To provide a foam dispenser capable of reducing size and weight of a nozzle head.SOLUTION: According to a foam dispenser for merging a content fluid and air that are forcibly fed from two pumps 2, 3 and discharging them from a discharge port 20b in a nozzle head 20 via foam through a foam member 21, the foam dispenser comprises a base cap 1; two pumps 2, 3; and a nozzle head 20 for operating the two pumps 2, 3 via a depressing operation and a return operation. An outside air introduction ventilation path t4 for supplying outside air to the pump 3 for air is demarcated between the base cap 1 and a mouth part, and is opened at a lower end of the base cap 1. The nozzle head 20 comprises a neck cylinder part 20a, a nozzle part 20d, and a tabular head plate 20e. A cross-sectional shape of a discharge passage 20c is in a roughly rectangular shape whose width is wide in the horizontal direction with respect to a vertical direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foamer dispenser which mixes the content liquid contained inside a container with air and discharges it in the form of foam.

  As a container that contains shampoo, body soap, hand soap, face wash, etc. as content liquid, the content liquid is mixed with air and discharged as foam from the viewpoint of omitting the foaming operation of the content liquid and aiming at easy use The one equipped with the former dispenser is often used.

  As such a foamer dispenser, for example, there are two pumps provided with a base cap attached to the mouth of the container and covering the opening of the mouth, for individually suctioning, pressurizing, and pumping the content liquid and air respectively. The base cap holds the inside of the container and the nozzle cap protrudes upward from the base cap. The two pumps are operated by depressing and returning the nozzle head, from these pumps There is known a configuration in which the pumped content liquid and air are combined and foamed while passing through the foam member and discharged in the form of foam from the discharge port of the nozzle head (see, for example, Patent Document 1).

JP, 2015-20760, A

  In the above-described conventional former dispenser, the top wall of the base cap is provided with a support cylindrical portion projecting from the top wall, and the neck portion of the nozzle head is disposed inside the support cylindrical portion. Outside air is supplied to a pump used for suctioning, pressurizing, and pumping air through the gap between the inner peripheral surface of the head and the outer peripheral surface of the neck portion.

  However, in such a configuration, water or the like may intrude into the pump from the upper end of the support cylindrical portion through the gap. Therefore, in the above-described conventional former dispenser, in order to prevent the entry of the water, the nozzle head is provided with a cover cylinder that covers the support cylindrical portion from the outside, but in such a configuration, the nozzle head is It becomes large and heavy, and there is room for improvement in reducing the size and weight of the nozzle head.

  Further, in the conventional former dispenser as described above, it is general that the cross-sectional shape of the inside flow path of the nozzle portion provided in the nozzle head, that is, the discharge flow path having the discharge port is substantially square. However, if the cross-sectional area of the nozzle portion is reduced while keeping the cross-sectional shape of the discharge flow path substantially square, the area on the inner surface of the discharge flow path decreases, and the resistance to the content liquid from the discharge flow path decreases. There is a problem that the liquid is discharged excessively vigorously from the discharge port and splattered around. Therefore, it is difficult to reduce the weight of the nozzle head by making the nozzle portion small and small in cross-sectional area, and from this point as well, there is room for improvement in reducing the size and weight of the nozzle head.

  An object of the present invention is to solve such a problem, and it is an object of the present invention to provide a former dispenser capable of reducing the size and weight of a nozzle head.

  The former dispenser of the present invention is attached to the mouth of the container and covers the opening of the mouth, and the inside of the container is held by the base cap so as to individually suction the contents and air. Two pumps for pressurizing and pumping, and a nozzle head which protrudes upward from the base cap and is movable in the vertical direction with respect to the base cap and operates the two pumps by a pressing operation and a returning operation. A foam dispenser for combining the content liquid and air pumped from the two pumps and causing the foam member to foam and discharge from the discharge port of the nozzle head, wherein suction and pressure of air are applied. And an outside air introducing air passage for supplying the outside air to the pump to be pumped is divided between the base cap and the opening. The nozzle head includes an internal passage through which the content liquid and the air are pumped from the two pumps, and the nozzle head is open at the lower end of the base cap, and the support cylinder protrudes from the top wall of the base cap. A neck tube portion disposed inside, and a discharge flow path which is continuous with the internal passage and whose tip is the discharge port, and is inclined from the upper end of the neck tube portion with respect to the axial direction of the neck tube portion A substantially rectangular shape having an extending nozzle portion and a plate-like head plate integrally provided on the upper wall of the nozzle portion, and the cross-sectional shape of the discharge flow passage being wider in the horizontal direction with respect to the vertical direction It is characterized by being.

  In the former dispenser of the present invention, in the above-described configuration, the pump for suctioning, pressurizing, and pumping the content liquid has a small diameter cylinder having a suction port at its bottom for suctioning the content liquid inside the container, and the small diameter cylinder A hollow piston that pumps contents liquid inside the small diameter cylinder toward the nozzle head by abutting on the inner peripheral surface of the small diameter cylinder and sliding toward the bottom of the small diameter cylinder by being pushed by the nozzle head; A hollow stem having an inner passage for feeding the content liquid pumped by a hollow piston to the nozzle head and having a flange projecting radially outward on an outer peripheral surface thereof, the pump providing suction, pressurization, and pumping of air; And a large diameter cylinder having a bottom integrally connected to the small diameter cylinder, and abut on an inner circumferential surface of the large diameter cylinder and pressed by the nozzle head An air piston that pumps air inside the large diameter cylinder toward the nozzle head by sliding toward the bottom of the large diameter cylinder, and is integrally provided on the inner peripheral edge of the air piston; A stem is surrounded to form an air passage communicating with the nozzle head between the stem and the hollow stem, and the hollow stem is slidably held, and is separated from the flange as the hollow stem slides downward. And a cylindrical guide that causes the air passage to communicate with the pressurizing chamber divided by the large diameter cylinder and the air piston, and the air piston includes an opening that communicates with the air passage for introducing outside air Preferably, a check valve for opening and closing the opening is provided.

  In the former dispenser of the present invention, in the above-described configuration, the base cap is integrally provided on an outer peripheral edge of the ceiling wall and provided with an internal thread screwed to an external thread provided on an outer peripheral surface of the opening. The air passage for introducing outside air has a wall extending along the inner circumferential surface of the mounting cylinder wall from the lower end to the upper end of the mounting cylinder wall while dividing the female screw in the circumferential direction and the inner surface of the ceiling wall Preferably, it is formed in the shape of a groove extending across the upper end of the large diameter cylinder along the length.

  In the former dispenser of the present invention, in the above-described configuration, it is preferable that the discharge flow passage has a shape in which the width in the horizontal direction increases from the side of the inner passage toward the side of the discharge port.

  In the former dispenser of the present invention, in the above configuration, the inner peripheral surface of the support cylinder and the outer peripheral surface of the support cylinder can be elastically brought into contact with the outer peripheral surface of the neck cylinder. It is preferable that a seal piece is provided to provide a tight seal with the outer peripheral surface.

  According to the present invention, it is possible to provide a former dispenser capable of reducing the size and weight of the nozzle head.

It is a partially cutaway sectional view shown in a state where the former dispenser which is one embodiment of the present invention is attached to the mouth of a container. It is an expanded sectional view which expands and shows the principal part of the former dispenser shown in FIG. It is a top view of the nozzle head shown in FIG. It is the figure which looked at the nozzle head shown in FIG. 3 from arrow A. FIG. It is a top view which shows the modification of the nozzle head shown in FIG. It is an expanded sectional view which shows the state which started pushing-down operation | movement of a nozzle head from the state shown in FIG. It is explanatory drawing which shows the state which mounted | worn the stopper with the former dispenser shown in FIG.

  Hereinafter, the former dispenser which is one embodiment of the present invention is illustrated and explained in detail, referring to drawings. In the specification, claims, abstract, and drawings, the vertical direction means the upper side and the lower side in a state in which the container C on which the foamer dispenser is mounted is in the upright position as shown in FIG. I assume.

  In FIG. 1, reference numeral 1 is a base cap attached to the mouth of the container C. The base cap 1 has a top wall 1a and a mounting cylindrical wall 1b integrally connected to the outer peripheral edge of the top wall 1a, and a female screw 1c provided on the inner peripheral surface of the mounting cylindrical wall 1b is the outer periphery of the mouth of the container C By screwing to an external screw provided on the surface, the screw can be detachably attached to the mouth. The base cap 1 attached to the mouth covers the opening of the mouth.

  In addition, as a structure which mounts the base cap 1 to the container C, you may use other structures, such as an undercut.

  At the center of the top wall 1a of the base cap 1, a support cylindrical portion 1d is provided which protrudes upward. The support cylindrical portion 1 d penetrates the mounting cylindrical wall 1 b and communicates with the inner space of the base cap 1.

  Reference numerals 2 and 3 are two pumps which are held by the base cap 1 inside the container C (inner side of the mouth) and suck, pressurize, and pump the content liquid and air separately.

  The pump 2 for the content liquid to be used for suctioning, pressurizing and pumping the content liquid, and the pump 3 for air to be used for suctioning, pressurizing and pumping air have the common cylinder member 4. The cylinder member 4 has a configuration in which a small diameter cylinder 4a constituting the pump 2 and a large diameter cylinder 4b having a bottom portion integrally connected to the upper portion of the small diameter cylinder 4a and constituting the pump 3 are coaxially arranged in series. It is A locking portion 4c having an L-shaped cross section protruding radially outward is provided on the outer peripheral surface of the upper end portion of the cylinder member 4, and the locking portion 4c is the upper end of the mouth of the container C and the ceiling wall 1a of the base cap 1 The pumps 2 and 3 are held at the inside of the mouth by being sandwiched between the inner surface of and the packing via a packing.

  The pump 2 for content liquid has a suction port 4 d for sucking the content liquid inside the container C into the pump 2 at the bottom of the small diameter cylinder 4 a. A fitting cylinder 4e is provided at the edge of the suction port 4d, and a suction pipe p extending toward the bottom of the container C is fitted and held in the fitting cylinder 4e.

  Inside the small diameter cylinder 4a, the hollow piston 5 is disposed so as to be in contact with the inner peripheral surface of the small diameter cylinder 4a and to be slidable along the axis thereof.

  A poppet 6 is disposed in an internal passage t1 formed inside the hollow piston 5. The poppet 6 has at its lower end a valve portion 6a for opening and closing the suction port 4d, and at its upper end has a valve portion 6b for opening and closing an outlet of the internal passage t1.

  A hollow stem 7 is provided outside the hollow piston 5. The hollow stem 7 has a lower cylindrical wall 7a surrounding the hollow piston 5, a flange 7b integrally connected to an upper portion of the lower cylindrical wall 7a, and a coaxial with the lower cylindrical wall 7a upward from the flange 7b. It has an upper cylindrical wall 7c that extends to the inside of the support cylinder 1d.

  A spring 8 is provided between the poppet 6 and the hollow piston 5. The spring force of the spring 8 biases the hollow piston 5 and the hollow stem 7 upward. Although the valve portion 6b of the poppet 6 is opposed to the lower end of the longitudinal rib provided on the inner peripheral surface of the hollow stem 7 in the initial posture, it enters inside the longitudinal rib and slides along the longitudinal rib. Can move.

  The flange 7b of the hollow stem 7 protrudes radially outward from the outer peripheral surface of the hollow stem 7, as shown in FIG. Moreover, the annular wall 7d which stands up from the upper surface is integrally provided in the flange 7b. The outer circumferential surface of the upper cylindrical wall 7c, the portion divided by the flange 7b and the annular wall 7d form a recessed space S1 which is open upward.

  As shown in FIG. 2, a ball support 7 e is provided on the upper portion of the upper cylindrical wall 7 c. The ball support portion 7e has a through hole at the center, and above the ball support portion 7e is disposed a ball valve B whose valve seat is the inclined open end of the through hole of the ball support portion 7e. The ball valve B closes the through hole by coming into contact with the valve seat of the ball support 7 e and opens the through hole by separating from the valve seat. Further, a cover member 9 is fitted and held on the upper cylindrical wall 7c, and the cover member 9 prevents the ball valve B from coming off.

  As shown in FIG. 1, the pump 3 for air is provided with an air piston 10 that abuts on the inner peripheral surface of the large diameter cylinder 4b and is slidably provided along the axis thereof. At the inner peripheral edge of the air piston 10, a cylindrical guide 10a surrounding the hollow stem 7 is integrally provided.

  As shown in FIG. 2, a slit-like gap is formed between the outer peripheral surface of the upper cylindrical wall 7c of the hollow stem 7 and the inner peripheral surface of the cylindrical guide 10a, and the air passes through the gap. The air passage A1 communicates with the recess space S1. In the initial posture shown in FIGS. 1 and 2, the lower end of the cylindrical guide 10a is in contact with the flange 7b. Further, as described later, the hollow stem 7 is axially slidable relatively slightly with respect to the cylindrical guide 10a, and the hollow stem 7 slides downward with respect to the cylindrical guide 10a. Then, the lower end of the cylindrical guide 10a separates from the flange 7b, and the air passage A1 is opened. On the other hand, when the hollow stem 7 slides upward with respect to the cylindrical guide 10a, the lower end of the cylindrical guide 10a abuts on the flange 7b, and the air passage A1 is closed.

  The air piston 10 has a partition 10b extending radially outward from the cylindrical guide 10a and defining a pressure chamber R for pressurizing air between the cylinder and the large diameter cylinder 4b. The partition 10 b is provided with an opening 10 c for introducing the outside air into the pressure chamber R. Further, a check valve 11 for opening and closing the opening 10c is fitted and held on the outer peripheral surface of the cylindrical guide 10a.

  As shown in FIG. 1, a nozzle head 20 made of synthetic resin is provided above the hollow stem 7 so as to project upward from the base cap 1 and to be movable in the vertical direction with respect to the base cap 1. The two pumps 2 and 3 can be operated by depressing the nozzle head 20 and returning operation.

  The nozzle head 20 is provided with a cylindrical neck portion 20a provided with an internal passage t2 to which contents and air are pumped from the two pumps 2 and 3 on the inside. The neck tube portion 20 a is fitted and fixed to the tip of the hollow stem 7 via the cover member 9, and can move together with the hollow stem 7 in the vertical direction. The inner passage t2 communicates with an inner passage t3 provided inside the hollow stem 7 and in communication with the inner passage t1. The lower part of the neck cylinder part 20a is disposed inside the support cylindrical part 1d and supported by the support cylindrical part 1d, and the upper part protrudes upward from the support cylindrical part 1d. The inner peripheral surface in the vicinity of the upper end of the support cylindrical portion 1d resiliently abuts on the outer peripheral surface of the neck cylinder 20a to tightly seal between the inner peripheral surface of the support cylindrical portion 1d and the outer peripheral surface of the neck cylindrical portion 20a A lip-like seal piece 1e for sealing is integrally provided. Further, as shown in FIG. 2, the neck tube portion 20 a is movable relative to the cylindrical guide 10 a of the air piston 10 in the vertical direction within the range of the dimension L. When the neck tube portion 20a is moved downward by a size L with respect to the cylindrical guide 10a of the air piston 10 from the state shown in FIG. 2, the lower end abuts the large diameter portion of the cylindrical guide 10a from the axial direction. When moving downward, the cylindrical guide 10a is configured to be pushed downward.

  Two foam members (mesh rings) 21 are disposed in the inner passage t2 while being held by the cover member 9.

  The foam member 21 of the present embodiment has a structure in which a mesh is attached to one end of a ring-shaped main body, and the two foam members 21 are arranged such that each mesh faces the outside (mesh So that the side which is not provided is the joint line). A plurality of longitudinal ribs are provided at equal intervals in the circumferential direction on the inner peripheral surface above the foam member 21 of the internal passage t2, and these longitudinal ribs are directed to the upper side of the foam member 21. Movement is regulated.

  As shown in FIG. 1, the nozzle head 20 is provided with a discharge flow passage 20c which is continuous with the internal passage t2 and whose tip is the discharge port 20b, and is inclined from the upper end of the neck portion 20a to the axial direction of the neck portion 20a. It has the nozzle part 20d extended in the direction (generally horizontal direction) which carried out. As shown in FIGS. 3 and 4, the nozzle portion 20d has a substantially rectangular cylindrical shape, and the cross-sectional shape of the discharge flow passage 20c (the shape in the cross section perpendicular to the axial direction of the discharge flow passage 20c) is in the vertical direction In contrast, it has a substantially rectangular shape (flat shape) with a wide width in the horizontal direction.

  Further, the discharge flow passage 20c has a shape in which the width in the horizontal direction expands in a step-like manner from the side of the internal passage t2 toward the side of the discharge port 20b. That is, the width dimension in the horizontal direction of the discharge port 20b of the discharge flow passage 20c is larger than the width dimension in the horizontal direction of the connecting portion of the discharge flow passage 20c with the internal passage t2.

  If the discharge flow passage 20c has a shape in which the width in the horizontal direction widens from the side of the internal passage t2 toward the side of the discharge opening 20b, for example, as shown in FIG. It can also be a tapered shape in which the horizontal width gradually and continuously spreads to the side.

  A head plate 20e is integrally provided on the upper wall of the nozzle portion 20d. The head plate 20e is formed in a thin plate shape, and has a desired size that serves both as the upper wall of the nozzle portion 20d and can be easily touched when the nozzle head 20 is pushed down.

  Between the base cap 1 and the opening of the container C, an outside air introducing air passage t4 is defined to supply the outside air to the pump 3 for suctioning, pressurizing, and pumping air. As shown in FIG. 2, the external air introducing air passage t4 extends along the inner peripheral surface of the mounting cylindrical wall 1b of the base cap 1 while dividing the female screw 1c in the circumferential direction from the lower end to the upper end of the mounting cylindrical wall 1b. At the same time, it is formed in a groove shape extending along the inner surface of the top wall 1a to the inner region of the large diameter cylinder 4b across the locking portion 4c provided on the upper end of the large diameter cylinder 4b. An outside air introducing air passage t4 extending to the inner region of the large diameter cylinder 4b communicates with the opening 10c provided in the air piston 10. The outside air introducing air passage t4 is opened to the outside at the lower end of the mounting cylinder wall 1b, and the outside air can be introduced therefrom to the opening 10c of the air piston 10 inside the base cap 1. Although only one air passage t4 for introducing outside air is shown in FIG. 2, in the present embodiment, four outside air are provided at intervals in the circumferential direction between the base cap 1 and the opening of the container C. An introduction air passage t4 is provided. In addition, if at least one air passage for introducing outside air t4 is provided between the base cap 1 and the opening of the container C, the number of the air passages for introducing outside air t4 can be changed variously.

  In the former dispenser having the above-described configuration, when the head plate 20e is pushed downward by hand to depress the nozzle head 20, the hollow stem 7 fixed to the neck portion 20a is moved downward together with the nozzle head 20. Moving. At this time, the lower end of the neck portion 20a slides slightly downward with respect to the cylindrical guide 10a by the dimension L shown in FIG. That is, the air piston 10 starts to move downward with a delay of the dimension L relative to the downward movement of the hollow stem 7. Thereby, as shown in FIG. 6, the lower end of the cylindrical guide 10a is separated from the flange 7b, and the pressure chamber R inside the air piston 10 and the air passage A1 communicate with each other through the recess space S1. When the pressing operation of the nozzle head 20 is further continued from the state shown in FIG. 6, the air piston 10 is pushed downward by the nozzle head 20 via the cylindrical guide 10a and directed toward the bottom of the large diameter cylinder 4b. And the air in the pressure chamber R is pressurized. Such air is pumped through the air passage A1 and the slit-like gap passage t5 between the cover member 9 and the hollow stem 7 into the merging space G in which the ball valve B is disposed.

  On the other hand, in the small diameter cylinder 4a, the valve portion 6a of the poppet 6 abuts against the inner surface of the small diameter cylinder 4a to close the suction port 4d, and the hollow piston 5 is pushed by the nozzle head 20 through the hollow stem 7 and the small diameter cylinder 4a By sliding toward the bottom, the inside of the small diameter cylinder 4a is pressurized, and by further depressing operation of the nozzle head 20, the valve portion 6b of the poppet 6 separates from the outlet of the internal passage t1 in the hollow piston 5, and the internal passage The content liquid inside t1 passes through the inner passage t3 of the upper cylindrical wall 7c of the hollow stem 7 and is pumped to the merging space G through the through hole of the ball support 7e while pushing up the ball valve B.

  The content liquid pressure-fed to the merging space G by the pump 2 operated by the depressing operation of the nozzle head 20 in this manner is pumped to the merging space G by the pump 3 operated by the depressing operation of the nozzle head 20 in the merging space G. Merge with the The content liquid joined to the air to be in a gas-liquid mixed state is further pressure-fed toward the nozzle head 20 to foam through the foam member 21 to form a foam, and the internal passage t2 of the nozzle head 20 and The ink is discharged in the form of foam from the discharge port 20b through the discharge flow path 20c of the nozzle portion 20d.

  After depressing the nozzle head 20 to the stroke end and releasing the depression and returning operation, the hollow piston 5, the hollow stem 7, the air piston 10 and the nozzle head 20 are respectively brought to the initial posture by the spring force of the spring 8. To return.

  In this return operation, the poppet 6 moves in accordance with the upward slide of the hollow piston 5, the suction port 4d of the small diameter cylinder 4a is opened, and the ball valve B is seated on the ball support 7e to close the through hole. As a result, the inside of the small diameter cylinder 4a becomes negative pressure, and the suction pipe p passes from the suction port 4d to the inside of the small diameter cylinder 4a so that the content liquid inside the container C is drawn into the inside of the small diameter cylinder 4a.

  When the nozzle head 20 returns to its initial posture, the valve portion 6b of the poppet 6 abuts on the upper end of the hollow piston 5 over the entire circumference, and the upper end of the internal passage t1 is closed. Since the communication between t1 and the inner passage t3 is interrupted, for example, even if the pressure inside the container C is increased due to the container C being unexpectedly squeezed (squeeze) or the outside temperature changes, the pressure It is possible to prevent the content liquid in the small diameter cylinder 4a from being pushed out to the side of the nozzle head 20, and to prevent the occurrence of liquid dripping from the discharge port 20b.

  On the other hand, in the large diameter cylinder 4b, the upward slide of the air piston 10 starts with a delay by the size L, so the lower end of the cylindrical guide 10a abuts the flange 7b as shown in FIG. The pressure chamber R is closed. For this reason, when the air piston 10 slides upward, the pressurizing chamber R has a negative pressure, so the check valve 11 closing the opening 10c is opened, and the pressure is added through the outside air introducing air passage t4 and the opening 10c. Outside air is introduced into the pressure chamber R. Further, as shown in FIG. 1, a lateral hole 4f is provided in the upper part of the large diameter cylinder 4b, and the outside air introduced from the outside air introducing air passage t4 flows into the inside of the container C through the lateral hole 4f. Do. Thereby, even if the content liquid is discharged from the inside of the container C, the inside of the container C does not remain in the negative pressure state.

  By repeatedly performing the pressing operation and the returning operation of the nozzle head 20 in this manner, the content liquid in the container C can be continuously discharged in the form of bubbles.

  In the former dispenser of the present embodiment having the above-described configuration, the air passage t4 for introducing outside air for supplying air to the pump 3 for use in air suction, pressurization, and pumping, the base cap 1 and the container C Since the space is formed between the opening and the mouth of the case, it is not necessary to take in the outside air from the upper end of the support cylinder 1d. Further, in the present embodiment, the inner peripheral surface of the support cylinder 1d and the outer peripheral surface of the neck cylinder 20a are elastically brought into contact with the outer peripheral surface of the neck cylinder 20a. Since the seal piece 1e for tightly sealing the gap is provided, even if the nozzle head 20 is not provided with a cover cylinder for covering the outside of the support cylinder 1d, the pumps 2, 3 and 4 are provided from the upper end of the support cylinder 1d. Water and the like can be prevented from entering the side of the Therefore, the nozzle head 20 can be reduced in size and weight by eliminating the need to provide the nozzle head 20 with a cover cylinder that covers the outer side of the support cylinder 1 d. Further, since it is not necessary to provide a cover cylinder, the outer diameter of the neck cylinder 20a of the nozzle head 20 can be made smaller than the support cylinder 1d of the base cap 1.

  Further, in the above configuration, the outside air introducing air passage t4 is opened at the lower end of the base cap 1, so that water or the like is prevented from entering the air pump 3 through the outside air introducing air passage t4. Can.

  Furthermore, in the former dispenser of the present embodiment, the external air introducing air passage t4 extends circumferentially from the lower end to the upper end of the mounting cylindrical wall 1b along the inner peripheral surface of the mounting cylindrical wall 1b of the base cap 1 And the upper end of the large diameter cylinder 4b is extended along the inner surface of the top wall 1a so as to extend over the upper end of the large diameter cylinder 4b. Between the cap 1 and the mouth of the container C, an outside air introducing air passage t4 can be formed.

  Furthermore, in the former dispenser of the present embodiment, the head plate 20e is formed in a thin plate shape, and the cross-sectional shape of the discharge flow path 20c of the nozzle portion 20d has a substantially rectangular shape whose width in the horizontal direction is wide with respect to the vertical direction. As a result, the nozzle head 20 can be made thinner than the conventional former dispenser, and thereby, the size and weight can be reduced.

  Here, when the cross-sectional shape of the discharge flow channel is substantially square, reducing the cross-sectional area of the nozzle portion reduces the area of the inner surface of the discharge flow channel, thereby reducing the resistance that the content liquid receives from the discharge flow channel. As a result, there is a problem that the content liquid is excessively vigorously discharged from the discharge port and scattered around. On the other hand, in the former dispenser of the present embodiment, even if the cross-sectional area of the nozzle portion 20d is reduced to make the nozzle head 20 thinner or smaller, the cross-sectional shape of the discharge flow passage 20c is horizontal to the vertical direction. By making the width of the direction wide and substantially rectangular, the area of the inner surface of the discharge flow passage 20c can be increased even with the same cross sectional area, thereby increasing the resistance that the content liquid receives from the discharge flow passage 20c. Then, the content liquid can be discharged gently from the discharge port 20b. Therefore, the nozzle head 20 can be further miniaturized by making the nozzle portion 20d thin and small in cross-sectional area without causing a problem that the content liquid is excessively vigorously discharged from the discharge port 20b and scattered around.・ It is possible to reduce the weight.

  Furthermore, in the former dispenser of the present embodiment, the discharge flow passage 2c has a shape in which the width in the horizontal direction increases from the side of the internal passage t2 to the side of the discharge port 20b. The content liquid can be discharged more gently from the discharge port 20 b such that the resistance that the liquid receives from the inner surface of the discharge flow path 20 c gradually increases. As a result, the content liquid can be more reliably suppressed from being excessively vigorously discharged from the discharge port 20b and splattered around, so that the nozzle portion 20d can be made thin and small with a smaller cross-sectional area, The nozzle head 20 can be further reduced in size and weight.

  Furthermore, as shown in FIG. 7, in the foamer dispenser of the present embodiment, the nozzle head 20 is configured such that the stopper 30 is detachably mounted on the neck tube portion 20a of the nozzle head 20 during distribution or the like. It can also be configured to be regulated so that the pressing operation can not be performed. As the stopper 30, it is possible to adopt a configuration having a fitting portion 30a having a C-shaped cross section fitted to the outer peripheral surface of the neck tube portion 20a and a knob 30b integrally connected to the back of the fitting portion 30a. it can. In this case, since the neck tube portion 20 a of the nozzle head 20 is formed to have a smaller diameter than the support tube portion 1 d of the base cap 1, a small-sized stopper 30 can be employed.

  It is needless to say that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, the pump 2 for the content liquid and the pump 3 for the air are not limited to those described above, but are operated by the pressing operation and return operation of the nozzle head 20 to direct the content liquid or air to the nozzle head 20 As long as it can be pumped, various configurations can be used.

Reference Signs List 1 base cap 1a top wall 1b mounting cylinder wall 1c female screw 1d support cylinder 1e seal piece 2 pump for content 3 pump for air 4 cylinder member 4a small diameter cylinder 4b large diameter cylinder 4c locking part 4d suction port 4e fitting Tube 4f lateral hole 5 hollow piston 6 poppet 6a valve 6b valve 7 hollow stem 7a lower cylindrical wall 7b flange 7c upper cylindrical wall 7d annular wall 7e ball support 8 spring 9 cover member 10 air piston 10a cylindrical guide 10b Partition wall 10c Opening 11 Check valve 20 Nozzle head 20a Neck tube 20b Discharge port 20c Discharge channel 20d Nozzle 20e Head plate 21 Foam member 30 Stopper 30a Fitting 30b Picking part C Container p Suction pipe t1 Internal passage S1 Recess Space B Ball valve A1 Air passage R Pressure chamber t2 Internal communication t3 vent passage t5 gap passage G converging space for the inner passage t4 outside air introducing

Claims (5)

A base cap attached to the mouth of the container and covering the opening of the mouth, and two pumps which are held inside the container by the base cap and suction, pressurize, and pump individually the content liquid and the air, respectively. And a nozzle head which projects upward from the base cap and is movable in the vertical direction with respect to the base cap, and which operates the two pumps by depressing operation and returning operation; It is a former dispenser in which the content liquid and air pressure-fed from a pump are merged and foamed through a foam member and discharged from a discharge port of the nozzle head,
An outside air introducing air passage for supplying outside air to the pump for suctioning, pressurizing, and pumping air is partitioned between the base cap and the opening and opened at the lower end of the base cap.
The nozzle head is
A neck tube portion including an internal passage through which contents and air are pumped from the two pumps, and a lower portion is disposed inside a support tube portion protruding from a top wall of the base cap;
A nozzle portion connected to the internal passage and having a discharge flow path whose front end is the discharge port, and extending from an upper end of the neck portion in a direction inclined with respect to the axial direction of the neck portion;
And a plate-like head plate integrally provided on the upper wall of the nozzle portion,
The former dispenser characterized in that a cross-sectional shape of the discharge flow channel is a substantially rectangular shape whose width in the horizontal direction is wide with respect to the vertical direction. The pump for suctioning, pressurizing, and pumping the content liquid
A small diameter cylinder having a suction port at a bottom thereof for suctioning the liquid content in the container;
A hollow piston which abuts on the inner peripheral surface of the small diameter cylinder, is pushed by the nozzle head, and slides toward the bottom of the small diameter cylinder, thereby pumping contents in the small diameter cylinder toward the nozzle head. When,
And a hollow stem having an inner passage for sending the content fluid pumped by the hollow piston to the nozzle head and having a flange protruding radially outward on an outer peripheral surface thereof;
The pump for suctioning, pressurizing and pumping air
A large diameter cylinder having a bottom integrally connected to the small diameter cylinder;
The air inside the large diameter cylinder is pumped toward the nozzle head by abutting against the inner peripheral surface of the large diameter cylinder and being pushed by the nozzle head and sliding toward the bottom of the large diameter cylinder. With an air piston,
An air passage is provided integrally with the inner peripheral edge of the air piston, surrounding the hollow stem to communicate with the nozzle head between the hollow stem and the hollow stem, and the hollow stem is slidably held, The hollow guide includes a cylindrical guide which causes the air passage to communicate with the pressurizing chamber defined by the large diameter cylinder and the air piston by moving away from the flange as the hollow stem slides downward.
The foamer dispenser according to claim 1, wherein the air piston is provided with an opening communicating with the air passage for introducing outside air and a check valve opening and closing the opening. The base cap has a mounting cylindrical wall integrally connected to an outer peripheral edge of the ceiling wall and provided with an internal thread screwed to an external thread provided on an outer peripheral surface of the opening.
The air passage for introducing outside air extends along the inner peripheral surface of the mounting cylindrical wall from the lower end to the upper end of the mounting cylindrical wall while dividing the female screw in the circumferential direction and along the inner surface of the top wall The former dispenser according to claim 2, wherein the former is formed in the shape of a groove extending across the upper end of the diameter cylinder.   The former dispenser according to any one of claims 1 to 3, wherein the discharge flow passage has a shape in which the width in the horizontal direction increases from the side of the internal passage toward the side of the discharge port.   A seal piece which resiliently abuts against the outer peripheral surface of the neck tube on the inner peripheral surface of the support cylindrical portion and tightly seals between the inner peripheral surface of the support cylindrical portion and the outer peripheral surface of the neck tube. The foamer dispenser according to any one of claims 1 to 4, wherein is provided.

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