JP2015143128A - Pump type discharge container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve usability of a pump type discharge container provided with a suction hole for taking in outside air to a nozzle head, and more specifically, to prevent suction of water adhering to the outer surface of the container when the container is restored after discharging a content fluid.SOLUTION: In a pump type discharge container provided with a suction hole for taking in outside air to a nozzle head, a flexible diameter-reduced cylindrical portion which is inclined downward in an inside direction is provided integrally at a lower end of an outer cylindrical portion of the nozzle head of a double cylinder structure. A gap between a base cap and the nozzle head is blocked by bringing the diameter-reduced cylindrical portion into slidable-contact with the outer surface of a cylindrical portion which becomes a guide stem of the base cap at the lower tip end of the diameter-reduced cylindrical portion. Since water adhering to the outer surface of the container when pushing down the nozzle head is scraped off by the diameter-reduced cylindrical portion, thereafter, when the push-down of the nozzle head is released and the container is restored, suction of the water adhering to the outer surface of the container into the container does not occur, and thereby usability as the pump-type discharge container is improved significantly.

Description

  The present invention relates to a pump-type discharge container that discharges liquid in a container as it is or in a bubble state from the discharge port by vertically moving the nozzle body, and is a discharge container provided with an intake hole for taking outside air into the nozzle body The present invention relates to improvement of usability, particularly prevention of inhalation of water adhering to the outer surface of the container when the container is restored after discharging the content liquid.

  In a pump-type discharge container, it is necessary to supply new air into the container that becomes negative pressure due to the discharge of the content liquid. Therefore, in general, from a slight gap between the guide stem portion of the base cap and the nozzle body Designed to inhale outside air. However, in such a container, there is a possibility that water adhering to the outer surface of the container from the gap between the base cap and the nozzle body is sucked together with the air and the water enters the container. When water enters the container in this way, it may be mixed into the content liquid and cause germs to be generated, or the liquid may solidify between parts, making it difficult to push down the nozzle body. In addition, a sufficient amount of air cannot be quickly sucked only by this narrow gap, which is inconvenient when a large amount of content liquid is to be discharged quickly.

  In response to such a problem, a pump-type discharge container having an intake hole for taking outside air into the outer cylinder portion of the nozzle body has been proposed in addition to the gap between the guide stem portion of the base cap and the nozzle body. (For example, see Patent Documents 1 and 2). However, even when the intake holes are provided in the nozzle body in this way, water may be sucked together with the outside air from a slight gap between the guide stem portion of the base cap and the nozzle body. In particular, the pump-type discharge container is often used in a place with high humidity such as a bathroom. In such a case, water easily adheres to the outer peripheral surface of the container. Then, after the pump is pushed down and the contents are discharged, when the container is restored, the water adhering to the outer surface of the container is sucked into the container through a slight gap between the guide stem portion of the base cap and the nozzle body. There was a case. Alternatively, although it is possible to prevent the inhalation of water by attaching a cover member separately to cover the gap (see, for example, Patent Document 3), the cover member may fall off, or the number of parts There was also a problem of an increase in cost due to an increase in the cost.

JP 2007-275777 A JP 2010-042827 A JP 2002-159893 A

  The present invention has been made in view of the problems of the prior art described above. That is, the problem to be solved is a pump-type discharge container provided with an intake hole for taking outside air into the nozzle head. Improvement of usability, more specifically, prevention of inhalation of water adhering to the outer surface of the container when the container is restored after the content liquid is discharged.

  As a result of intensive studies by the present inventors in view of the problems of the prior art, in a pump-type discharge container provided with an intake hole for taking outside air into the nozzle head, the outer side of the nozzle head having a double cylinder structure is provided. A flexible reduced-diameter cylindrical portion inclined in the downward inner direction is integrally provided at the lower end of the cylindrical portion, and the outer surface of the cylindrical portion serving as a guide stem of the base cap at the lower end of the reduced-diameter cylindrical portion. By sliding the nozzle head, the gap between the base cap and the nozzle head is closed, and water attached to the outer surface of the container when the nozzle head is pushed down is scraped off by the reduced diameter cylindrical portion. When the head is released and the container is restored, water attached to the outer surface of the container will not be sucked into the container, improving usability as a pump-type discharge container. Out, it has led to the completion of the present invention.

That is, the pump-type discharge container according to the present invention is
A liquid contained in the container body by moving up and down a nozzle head part provided above the container body and a discharge pump body mounted on the mouth of the container body. Is a pump-type discharge container for discharging from a discharge port provided in the nozzle head part,
The discharge pump body is
A cylindrical liquid cylinder portion capable of communicating with the container body;
A cylindrical member that is slidable in contact with the inner wall surface of the liquid cylinder portion and can move up and down, and forms a gap with the liquid cylinder portion as a liquid chamber and moves upward in the container main body. A cylindrical liquid piston portion that sucks the liquid into the liquid chamber and pumps the liquid in the liquid chamber upward through an open end provided above the liquid chamber by moving downwardly;
A cylindrical member that can move up and down in conjunction with the liquid piston portion and communicates with the liquid chamber, and communicates with the liquid chamber below and to a discharge port provided at the end. It has a double cylinder structure consisting of a small-diameter inner cylindrical portion that communicates with a large-diameter outer cylindrical portion provided so as to cover the outside thereof, and the liquid in the liquid chamber is moved by its downward movement. A nozzle head part that flows into the inside through the upper opening end of the liquid piston part and discharges the liquid from the discharge port;
A skirt-like member provided so as to cover the upper part of the container main body and the lower part of the nozzle head part from the outside, comprising a small-diameter cylindrical part upright and a large-diameter cylindrical part expanded downward. A base cap portion that is detachably attached to the container main body by screwing the inner surface of the lower large-diameter cylindrical portion with the outer surface of the mouth portion of the container main body,
The nozzle head portion is formed with an intake hole capable of taking outside air into a space formed by the outer cylindrical portion and the inner cylindrical portion, and the outer cylindrical shape of the nozzle head portion. At the lower end of the portion, a flexible reduced-diameter cylindrical portion inclined downward and inward is integrally provided continuously, and above the base cap portion at the lower end of the reduced-diameter cylindrical portion. It is characterized by being in sliding contact with the outer surface of the small-diameter cylindrical portion.

Further, in the pump-type discharge container, the narrowest inner peripheral diameter of the lower end of the reduced diameter cylindrical portion of the nozzle head portion is the outer peripheral diameter of the small diameter cylindrical portion above the base cap portion in the state of a single component before assembly. It is preferable to be smaller by 0.1 to 0.5 mm.
In the pump-type discharge container, it is preferable that the reduced diameter cylindrical portion of the nozzle head portion has a vertical length of 0.5 to 3.0 mm and an average thickness of 0.1 to 1.0 mm. .
Further, in the pump type discharge container, the reduced diameter cylindrical portion of the nozzle head portion is formed so that the thickness of the lower tip portion is the thinnest, and the base cap portion upper small diameter cylindrical shape at the lower tip portion. The contact length with the outer surface of the portion is preferably 0.1 to 2.0 mm.

Further, in the pump-type discharge container, it is preferable that a notch-shaped slit is formed in the vertical direction of the reduced diameter cylindrical portion of the nozzle head portion or the upper small diameter cylindrical portion end of the base cap portion. It is.
In the pump-type discharge container, it is preferable that an inclined surface that is inclined downward in the outer peripheral surface direction is formed at the upper end of the upper small-diameter cylindrical portion of the base cap portion.

  According to the present invention, in a pump-type discharge container provided with an intake hole for taking outside air into the nozzle head, it is inclined downward and inward toward the lower end of the cylindrical portion outside the nozzle head having a double cylinder structure. The base cap and the nozzle head are provided by integrally providing a flexible reduced-diameter cylindrical portion and slidingly contacting the outer surface of the cylindrical portion serving as a guide stem of the base cap at the lower end of the reduced-diameter cylindrical portion. When the nozzle head is pushed down, water adhering to the outer surface of the container is scraped off by the reduced-diameter cylindrical portion, and then the nozzle head is released from being pushed down to restore the container. The suction of the water adhering to the outer surface of the container into the container does not occur, and the usability as a pump type discharge container is improved.

It is sectional drawing (front sectional drawing of the state in which the nozzle head at the time of shipment exists in an upper limit position) of the pump type discharge container 10 concerning one Embodiment of this invention. The principal part expanded sectional view for demonstrating the operation state of the nozzle head 22 and the base cap 20 concerning one Embodiment of this invention ((a) Before use, (b) After nozzle head depression, (c) Nozzle head depression After release). It is a principal part expanded sectional view for demonstrating the positional relationship of the nozzle head 22 and the base cap 20 concerning one Embodiment of this invention ((a) Before component assembly, (b) After component assembly). It is an enlarged side view of the vicinity of the nozzle head 22 of the pump-type discharge container according to the embodiment of the present invention. It is an operation state explanatory view of pump type discharge container 10 concerning one embodiment of the present invention ((a) before use, (b) after nozzle head depression, (c) after nozzle head depression release).

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, although the pump type discharge container of embodiment shown below is a container which mixes the foamable liquid accommodated in the container with air, and discharges it in foam shape, this invention is only in such a foam discharge container. It is not limited, and any liquid discharge container that discharges the liquid in the container body may be used.

<Configuration of pump-type discharge container>
FIG. 1 shows a cross-sectional view (a front cross-sectional view of a state in which a nozzle head at the time of shipment is at an upper limit position) of a pump type discharge container 10 according to an embodiment of the present invention.
A pump-type discharge container 10 according to the present embodiment includes a container main body 12 that stores liquid, a discharge pump body 14 that is detachably attached to an upper end of the container main body, and a communication with the discharge pump body. And a tube 16 extending into the container body.

  The discharge pump body 14 includes a skirt-shaped base cap 20, a nozzle head 22 that serves as an operation portion and a discharge portion, a double cylinder 24 that constitutes a liquid cylinder 24A and an air cylinder 24B, a liquid piston 26, The air piston 28 is a main component. These component parts are usually formed from a synthetic resin material. For example, polypropylene (PP), high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), etc. Polyolefin resins and the like can be used alone or in appropriate mixture.

Hereinafter, a specific structure of each component will be described.
The skirt-shaped base cap 20 includes a top wall portion 20a having an opening at the center, a skirt portion 20b hanging from the outer peripheral edge portion of the top wall portion 20a, and an upright wall 20c standing upright from an opening edge portion of the top wall portion 20a. It is made up of. Further, on the lower surface of the top wall portion 20a, an annular tube portion that comes into contact with the air cylinder 24B and an annular tube portion having a smaller diameter than that are respectively suspended. A female screw is formed on the inner peripheral surface of the skirt portion 20b of the base cap 20. On the other hand, a male screw is provided on the outer peripheral surface of the mouth portion of the container main body 12 that contains the foamable liquid, and the base cap 20 is attached to the female screw on the inner surface of the skirt portion 20b. 12 is detachably mounted. In this way, the base cap 20 is fixed to the mouth of the container body 12 so as to cover the mouth of the container body 12 and the lower part of the nozzle head 22 from the outside.

  The double cylinder 24 is integrally molded by injection molding or the like using synthetic resin as one part. That is, a large-diameter air cylinder 24B and a small-diameter liquid cylinder 24A that are concentrically arranged are integrally formed, and the container body is formed at the upper opening edge of the air cylinder 24B. An annular flange portion 24a placed on the upper end of the mouth portion is formed.

  The air cylinder 24B of the double cylinder 24 has a short large-diameter portion having an outer diameter that is the same as or slightly smaller than the inner diameter of the container body mouth portion, and a uniform inner diameter slightly smaller than that, following the flange portion 24a. It is a cylindrical part which consists of a cylinder wall. From the lower end of the cylinder wall of the cylinder 24B for air, it inverts further upward and the connection part 24b is extended inward in radial direction.

  The liquid cylinder 24A of the double cylinder 24 has an upper end connected to the radially inner end of the connecting portion 24b and extending downward from the connecting portion 24b, and a cylindrical shape described later at the lower end of a cylindrical cylinder wall 24c. An annular pedestal 24d serving as a receiving portion at the lower end of the locking body 32 is formed, and a funnel-shaped ball valve seat 24e serving as a valve seat for the ball valve 30 is formed below the annular pedestal 24d. A cylindrical lower cylindrical portion 24f for press-fitting the tube body 12 for guiding the foamable liquid from the main body into the liquid cylinder 24A is formed. Further, the tube body 16 press-fitted into the lower cylindrical portion 24f extends to the vicinity of the bottom portion in the container body.

  Each of the liquid piston 26 and the air piston 28 is formed by injection molding using a synthetic resin as separate parts, and thereafter concentrically connected as one piston body. With respect to the double cylinder 24, the sliding seal portion 28a of the air piston 28 is installed so as to slide along the inner surface of the cylinder wall of the air cylinder 24B, and the sliding seal portion 26c of the liquid piston 26 is provided. Is installed so as to slide along the inner surface of the cylinder wall 24c of the liquid cylinder 24A. A nozzle head 22 is connected to the upper end of the air piston 28.

  The air piston 28 is formed by integrally forming an upper small-diameter portion 28b of an axial center portion and a lower large-diameter portion 28c arranged concentrically with the upper small-diameter portion 28b via an intermediate connecting portion 28d. is there. An intermediate connecting portion 28d is formed radially inward from the upper end of the lower large diameter portion 28c, and the upper small diameter portion 28b rises upward from the inner peripheral edge of the intermediate connecting portion 28d. A reduced diameter portion 28e having a slightly reduced inner diameter is provided at the upper end portion of the upper small diameter portion 28b, and vertical ribs 28f are provided radially on the inner surface of the reduced diameter portion 28e. The vertical ribs 28f are configured as inclined surfaces whose lower surfaces are inclined downward and outward. At the lower end of the lower large-diameter portion 28c, sufficient airtightness can be secured between the lower large-diameter portion 28c and the inner surface of the cylinder wall of the air cylinder 24B, and it can slide up and down relative to the inner surface of the air cylinder 24B. The sliding seal portion 28a is integrally formed.

  The liquid piston 26 has a substantially cylindrical shape as a whole, and a funnel-shaped liquid chamber valve seat portion 26a whose inner diameter increases toward the upper side is formed on the inner surface of the upper end portion of the hollow portion of the axial center. Is formed. At the lower end of the liquid piston 26, there is formed a sliding seal portion 26c that moves up and down the inner surface of the cylinder wall 24c of the liquid cylinder 24A in a liquid-tight state. An annular plane portion is formed so as to be a receiving portion on the upper end side of the coil spring.

  The piston 28 for air and the piston 26 for liquid are integrally connected as one piston body, when the upper end part of the piston 26 for liquid is press-fitted inside the lower part of the upper small diameter part 28b of the piston 28 for air. . The piston bodies 26 and 28 integrated in this way insert the air piston 28 into the air cylinder 24B and the liquid piston 26 into the liquid cylinder 24A with respect to the double cylinder 24. Therefore, it is assembled so that it can move up and down as a whole.

  A coil spring (shown by a dotted line in FIG. 1) is interposed between the vicinity of the lower end of the liquid piston 26 and an annular receiving portion 32a formed at the lower end of a cylindrical locking body 32 described later. Has been. For this reason, the liquid piston 26 is always urged in the direction of widening the gap with the cylindrical locking body 32 by the spring force of the coil spring.

  Further, with the above container configuration, a liquid chamber A is formed as an inner space between the liquid cylinder 24A and the liquid piston 26, and the space surrounded by the air cylinder 24B, the air piston 28, and the liquid piston 26. As a result, an air chamber B is formed. Further, a mixing chamber C is formed as a space surrounded by the upper end portion of the liquid piston 26 and the upper portion of the air piston 28, a locking portion 38a at the tip of a rod-shaped valve body 38 to be described later, and the porous body holder 36. An air passage D for sending air from the air chamber B to the mixing chamber C is formed as a space surrounded by the upper outer surface of the liquid piston 26 and the lower inner surface of the upper small-diameter portion 28b of the air piston 28. ing.

  That is, the lower inner surface of the upper small-diameter portion 28 b of the air piston 28 is a fitting portion of the liquid piston 26. Further, a plurality of longitudinal grooves are provided in the circumferential direction at locations corresponding to the fitting portions on the upper outer surface of the liquid piston 26, whereby the upper outer surface of the liquid piston 26 and the air piston 28 are provided. An air passage D is formed between the inner surface and the inner surface.

  A longitudinal rib for forming the longitudinal groove is provided at a position corresponding to the fitting portion of the upper outer surface of the liquid piston 26, and the longitudinal rib is connected to the upper small diameter portion 28 b of the air piston 28. The outer diameter of the imaginary circle connecting the outer surfaces thereof is made substantially equal to the inner diameter of the upper small diameter portion 28b of the air piston 28. Note that the longitudinal grooves or longitudinal ribs for forming the air passage D may be provided not on the portion corresponding to the fitting portion of the upper surface of the liquid piston 26 but on the inner surface of the air piston 28.

  The nozzle head 22 is connected to the air piston 28, and the side wall portion is formed as a double wall of the inner cylinder portion 22a and the outer cylinder portion 22b, and is bent upward through the inner cylinder portion 22a. A bubble passage E is formed as a letter-shaped through hole. A discharge port 22c for discharging bubbles to the outside is provided at the downstream end of the bubble passage E. After the base cap 20 is attached to the double cylinder 24 in which the air piston 28 and the liquid piston 26 are assembled, the upper end of the reduced diameter portion 28e of the air piston 28 is attached to the lower end portion of the inner cylinder portion 22a of the nozzle head 22. The nozzle head 22, the air piston 28, and the liquid piston 26 are integrally connected by being fitted and fixed, and the mixing chamber C formed inside the reduced diameter portion 28 e of the air piston 28, the nozzle The bubble passage E inside the head 22 is communicated.

  Further, in the bubble passage E in the nozzle head 22, a porous body holder 36 in which sheet-like porous bodies 36 a and 36 b are stretched at both ends prior to the connection with the air piston 28 is provided downstream of the mixing chamber C. Has been inserted. The porous body holder 36 may be, for example, a structure in which a mesh body knitted with synthetic resin is used as sheet-like porous bodies 36a and 36b and welded to both ends of a cylindrical synthetic resin spacer 36c. Further, the mesh of the porous body 36b on the downstream side (side close to the bubble discharge port 22c) is formed to be finer than the mesh of the porous body 36a on the upstream side (side near the mixing chamber C). It is desirable from the viewpoint of foam quality.

  Here, in the nozzle head 22 of the present embodiment, the air flow between the inner cylinder part 22a and the outer cylinder part 22b from the outside into the air chamber B and the container body 12 which are in a decompressed state after discharging the liquid. An intake hole 22d for supplying air through the space F is formed. That is, a space closed by the lid portion 22e is formed at the top of the nozzle head 22, and a part of this space is a space portion 22f that protrudes outward from the outer peripheral surface of the outer cylindrical portion 22b. An intake hole 22d is opened to the outer wall of the space 22f. Further, a communication hole 22g for communicating the ventilation space F between the inner cylinder part 22a and the outer cylinder part 22b is provided inside the space part 22f. In the present embodiment, the space portion 22f is formed in a groove shape extending in the circumferential direction along the outer peripheral surface of the outer cylindrical portion 22b, but partially protrudes at a part of the outer peripheral surface of the outer cylindrical portion 22b. You may make it do.

  Further, in the present embodiment, as a waterproof wall for preventing water from entering from above or below the intake hole 22d provided in the nozzle head 22, it hangs downward from the outer edge of the top. The cover portion 22h is provided on the outer wall of the space portion 22f and extends outward from the intake hole 22d. Note that the intake hole 22d formed in the outer wall of the space 22f is formed so as to cut out the outer wall from the bottom corner of the space 22f. Can be molded. In addition, it is desirable that an intake hole 22d be formed at a position shifted in the circumferential direction with respect to the communication hole 22g communicating with the ventilation space F. As a result, even if water enters from the intake hole 22d, the possibility of water entering the ventilation space F through the communication hole 22g is reduced.

  Furthermore, a funnel-shaped reduced-diameter cylindrical portion 22i that is inclined downward and inward is integrally provided continuously at the lower end of the outer cylindrical portion 22b of the nozzle head 22, and the reduced-diameter cylindrical portion 22i is flexible. It is made of a member having a property, and is in sliding contact with the outer surface of the upright wall 20c of the base cap 22 at the lower end. That is, the inner peripheral diameter of the reduced-diameter cylindrical portion 22 i provided at the lower end of the outer cylindrical portion of the nozzle head 22 is shorter than the outer peripheral diameter of the upright wall 20 c of the base cap 20 in the state of the component alone before assembly. By assembling them, the lower end of the flexible reduced-diameter cylindrical portion 22i is expanded by the upright wall 20c and is in a slidable contact state. For this reason, in this embodiment, when the inside of the container main body 12 is in a reduced pressure state when the container is restored, not the gap between the outer cylinder portion 22b of the nozzle head 22 and the upright wall 20c of the base cap 20, but the nozzle head Outside air is introduced into the container body 12 only from the intake holes 22 d provided in the container 22.

FIG. 2 shows an enlarged cross-sectional view of a main part for explaining the operation state of the nozzle head 22 and the base cap 20 in this embodiment ((a) before use (nozzle head rising end), (b) after being pushed down ( (Nozzle head lower end), (c) after release of pressing down (nozzle head upper end)).
As shown in FIGS. 2A to 2C, in the present embodiment, the lower end of the reduced diameter cylindrical portion 22i of the nozzle head 22 is in contact with the upright wall 20c of the base cap 20, and is closed without a gap. It is peeling off. For this reason, as shown in FIG. 2C, even if the inside of the container is in a decompressed state when the depression of the nozzle head 22 is released and the container is restored, the reduced diameter cylindrical portion 22i and the upright wall 20c Water does not enter through the gap. In particular, when used under high humidity conditions such as in a bathroom, it is highly possible that water adheres to the outer surface of the upright wall 20c, but such inhalation of adhering water can be prevented. In addition, the reduced-diameter cylindrical portion 22i has a shape that is inclined downward inward, and is always pressed against the upright wall 20c. Even if the axis of the nozzle head 22 is tilted, a gap is hardly generated. Furthermore, for example, as shown in FIG. 2C, when the nozzle head is released and the container is restored, the ventilation space F is in a reduced pressure state, so that the reduced diameter cylindrical portion 22i is further upright. Since the pressure acts so as to be pressed against the wall 20c, a gap is less likely to occur.

  Further, as shown in FIGS. 2A and 2B, in the present embodiment, the reduced diameter cylindrical portion 22i has a shape that is inclined downward inward, and therefore the nozzle head 22 is pushed down. In this case, water adhering to the outer surface of the upright wall 20c is scraped downward. For this reason, as shown in FIG. 2 (c), when the container is restored by releasing the push-down of the nozzle head, the water on the outer surface of the upright wall 20c is removed. Can be effectively prevented. Further, the reduced diameter cylindrical portion 22i is in contact with the upright wall 20c only at the lower end, and since the contact area is narrow, the resistance when the nozzle head 22 moves up and down is small, and the usability is also good.

  As shown in FIG. 3 (a), in the present embodiment, the lower tip of the reduced diameter cylindrical portion 22i provided at the lower end of the outer cylindrical portion of the nozzle head 22 in the state of the component alone before assembly ( The inner peripheral diameter of the narrowest part) is designed to be 0.5 mm shorter than the outer peripheral diameter of the upright wall 20c of the base cap, so that the lower end of the reduced diameter cylindrical portion 22i is the upright wall. 20c is in sliding contact. The inner peripheral diameter of the lower end of the reduced diameter cylindrical portion 22i is not particularly limited, but is designed to be shorter by about 0.1 to 0.5 mm than the outer peripheral diameter of the upright wall 20c. Is desirable. If the difference in diameter is smaller than 0.1 mm, there will be a gap due to repeated pushing down of the nozzle head or impact from the outside, and there is a possibility that external water will be sucked when the container is restored, and 0.5 mm If it is larger than this, the sliding resistance becomes too large, and it may be difficult to move the nozzle head 22 up and down.

  In addition, as shown in FIG. 3B, in this embodiment, in the state after assembling the parts, the vertical length of the reduced diameter cylindrical portion 22 is 1.5 mm, and the average wall thickness is 0.2 mm. It is. The vertical length and the average wall thickness are not particularly limited, but are preferably 0.5 to 3.0 mm as the vertical length and 0.1 to 1.0 mm as the average wall thickness. In particular, if the average thickness of the reduced-diameter cylindrical portion 22i is less than 0.1 mm, it cannot be satisfactorily adhered to the upright wall 20c, and a gap is formed, or the strength is insufficient and it is easily damaged. Become. On the other hand, if the diameter exceeds 1.0 mm, the reduced-diameter cylindrical portion 22i loses flexibility (flexibility) and the resistance during sliding increases, and the nozzle head 22 and the base cap 20 are difficult to assemble. It may become. When the resin head is used and the nozzle head 22 is integrally formed using a mold, the inner diameter of the reduced diameter cylindrical portion 22i is smaller than the inner diameter of the outer cylinder portion 22b. Although it is necessary for the reduced diameter cylindrical portion 22i to bend outward, if the thickness of the reduced diameter cylindrical portion 22i is too thick, flexibility (flexibility) is lowered and it is difficult to extract from the mold. There is also a problem of becoming.

  Further, the reduced diameter cylindrical portion 22i of the present embodiment is formed so that the thickness of the lower end portion is the thinnest, and the contact length with the upright wall 20c at the lower end portion is 0.1. It is designed to be 1 mm. Thus, by reducing the contact area with the upright wall 20c at the lower tip of the reduced diameter cylindrical portion 22i, the resistance when the nozzle head 22 moves up and down is reduced, and the usability is improved. The contact length at the lower end of the reduced diameter cylindrical portion 22i is not particularly limited, but is preferably 0.1 to 2.0 mm.

  Moreover, as shown in FIG. 4, in the reduced diameter cylindrical part 22i of this embodiment, the slit may be provided in the up-down direction. By providing the slit, the reduced-diameter cylindrical portion 22i is easily bent and assembled, the productivity is improved, and the contact area with the upright wall 20c is also narrowed. Therefore, when the nozzle head 22 is moved up and down, The sliding resistance becomes smaller and the usability is improved. Alternatively, in the upright wall 20c of the base cap, a slit may be provided in the vertical direction in a region that is in sliding contact with the reduced diameter cylindrical portion 22i.

  As shown in FIG. 1, in the base cap 20 of the present embodiment, an inclined surface is formed at the upper end of the upright wall 20c so as to be inclined downward in the outer peripheral surface direction. Providing such an inclined surface facilitates the assembly of the nozzle head 22 and the base cap 20. That is, when assembling the product, the outer cylindrical portion 22b of the nozzle head 22 needs to be fitted outside the upright wall 20c of the base cap 22, but the inner diameter of the reduced-diameter cylindrical portion 22i is reduced. If the upper end of 20c is a flat surface, the reduced diameter cylindrical portion 22i may be caught. On the other hand, when the inclined surface is formed at the upper end of the upright wall 20c, when the nozzle head 22 is inserted from the upper side, the reduced-diameter cylindrical portion 22i slides on the inclined surface, so that it is easy to insert and production. Efficiency is improved. Note that the inclined surface is not limited to a linear cross section as shown in FIG. 1, but may be an inclined surface having a circular cross section.

  In the present embodiment, the ball valve 30 is placed on the substantially funnel-shaped ball valve seat portion 24e near the lower end of the liquid cylinder 24A, thereby constituting a primary valve. That is, during normal pressure or pressurization of the liquid chamber A, the ball valve 30 abuts on the ball valve seat portion 24e and closes the lower end of the liquid cylinder 24A, while the liquid chamber A is in a negative pressure state. The ball valve 30 is separated from the ball valve seat portion 24e, and the lower end of the liquid cylinder 24e is opened.

  An elastic valve body 34 made of a soft synthetic resin is provided between the outer peripheral side lower surface of the intermediate coupling portion 28d of the air piston 28 and the upper surface of the annular projection 26b formed on the outer peripheral surface of the liquid piston 26. It has been. The elastic valve body 34 includes an intake hole 28g formed in the intermediate connection portion 28d of the air piston 28 and an inlet side (air chamber) of the air passage D formed in the press-fit connection portion of the air piston 28 and the liquid piston 30. B side) communicates with the intake hole 28g only when the air chamber B is under negative pressure (secondary valve), and communicates the air chamber B with the air passage D only when the air chamber B is pressurized (tertiary valve). ).

  Here, the elastic valve body 34 has a thin and annular outer valve portion 34b extending outward from the vicinity of the lower end portion of the cylindrical base portion 34a with respect to the cylindrical cylindrical base portion 34a, and the cylindrical base portion 34a. A thin-walled and annular inner valve portion 34c extending inwardly from the vicinity of the lower end portion is integrally formed. The elastic valve body 34 is in a state in which the cylindrical base 34a is fixed by the intermediate coupling portion 28d of the air piston 28, and the outer edge portion on the upper surface side of the outer valve portion 34b is more radial than the intake hole 28g. The outer side is in contact with the lower surface (air chamber B side) of the intermediate coupling portion 28d, and the lower surface side inner edge portion of the inner valve portion 34c is in contact with the upper surface of the annular protrusion 26b formed on the liquid piston 26. It is installed in the upper part of the air chamber B. The inward valve portion 34c of the elastic valve body 34 has a sufficient interval to be displaced upward with respect to the lower surface of the upper intermediate coupling portion 28d.

  In the secondary valve that opens and closes the intake hole 28g, when the air chamber B is at a normal pressure or a pressurized state, the outer edge portion of the outer valve portion 34b contacts the lower surface of the intermediate connecting portion 28d, and the air chamber B The intake hole 28g, which is a communication path for outside air, is closed. Here, when the air piston 28 rises and the air chamber B becomes negative pressure, the outer valve portion 34b of the elastic valve body 34 is displaced downward (elastically deformed) and is separated from the lower surface of the intermediate connecting portion 28d. Thus, the intake hole 28g is opened.

  On the other hand, in the tertiary valve that controls the communication between the air chamber B and the air passage D, when the air chamber B is in a reduced pressure or normal pressure state, the inner edge of the inner valve portion 34c is the annular protrusion of the liquid piston 26. The inlet part from the air chamber B to the air passage D is closed in contact with 26b. Then, when the air piston 32 is lowered and the air chamber B is pressurized, the inner valve portion 34c of the elastic valve body 34 is displaced upward (elastically deformed) and separated from the annular protrusion 26b. The entrance of the passage D is opened. Here, since the elastic valve body 34 closes the inlet portion from the air chamber B to the air passage D when the air chamber B is in a reduced pressure or normal pressure state, the nozzle head 22 rises together with the air piston 28. In doing so, the inlet portion from the air chamber B to the air passage D is closed. Further, since the volume of the air passage D does not change even when the nozzle head 22 is raised, the air passage D is maintained in a normal pressure state when the nozzle head is raised.

  The nozzle head 22 fixed from above with respect to the liquid piston 26 and the air piston 28 has an outer cylindrical portion 22b having a ventilation space F through which air can pass, and the upright wall 20c of the base cap 20 Guided by the tip. The head space in the container body (above the liquid level of the foamable liquid) is passed through a ventilation space F in the gap between the inner peripheral edge of the upright wall 20c of the base cap 20 and the outer peripheral surface of the outer cylindrical portion 22b of the nozzle head 22. 24g is formed in the upper part of the cylinder wall of the air cylinder 24B. Further, the sliding seal portion 28a of the air piston 28 has a U-shape with a shallow cross section so as to cover and close the air hole 24g from the inside with the air piston 28 in the upper limit position. Is formed. Then, when the air piston 28 moves downward, the air hole 24g is released from the sliding seal portion 28a, and the outside air communicates with the inside of the container body.

  In the present embodiment, a synthetic resin rod-shaped valve body 38 is provided in the space formed by the liquid piston 26 and the liquid cylinder 24A. A cylindrical locking body 32 made of synthetic resin is provided below the liquid cylinder 24A to limit the ascent of the rod-shaped valve body 38. When the nozzle head 22 is lowered by the locking portion 40a provided at the tip of the rod-shaped valve body 38 and the funnel-shaped liquid chamber valve seat portion 26a provided at the upper end of the liquid piston 26, the liquid The upper end outlet of the chamber A (liquid piston 26) is opened (quaternary valve).

  That is, with respect to the substantially funnel-shaped liquid chamber valve seat portion 26a formed on the inner peripheral surface in the vicinity of the upper end of the liquid piston 26, the outer peripheral surface in the vicinity of the upper end of the rod-shaped valve body 44 has a substantially larger diameter. The mortar-shaped locking portion 38 a is formed so that at least its maximum outer diameter portion is larger in diameter than the minimum inner diameter portion of the liquid passage valve seat portion 26 a of the liquid piston 26. A quaternary valve is constituted by the locking portion 38 a and the liquid passage valve seat 26 a of the liquid piston 26. In the state where the nozzle head 22 is at the bottom dead center, the locking portion 38a and the liquid chamber valve seat portion 26a do not come into contact with each other, so that the upper end outlet of the liquid piston 26 is opened, and the nozzle head 22 is lifted. Accordingly, the upper end outlet of the liquid piston 26 is closed for the first time when the liquid chamber valve seat portion 26a rises and comes into contact with the locking portion 38a. Here, until the upper end outlet of the liquid piston 26 is closed, the volume in the liquid chamber A gradually increases due to the rise of the liquid piston 26, so the liquid chamber A is temporarily in a reduced pressure state. It becomes.

  Further, a large-diameter portion 38b that forms a step with respect to the upper portion thereof is formed at the small-diameter lower end portion of the rod-shaped valve body 38 with the lower end tapered, and the large-diameter portion 38b is formed in a cylindrical shape. The locking body 32 is held so as to be movable up and down only within a predetermined range. As a result, the rod-shaped valve body 38 is held so as to be movable up and down only within a predetermined range with respect to the liquid cylinder 24A, and the rod-shaped valve body 38 allows the upper limits of the liquid piston 26 and the air piston 28 to be increased. The position is regulated. The lower end portion of the small diameter of the rod-shaped valve body 38 is preferably configured to generate a frictional resistance to the extent that the movement is not hindered when moving up and down while being held by the cylindrical locking body 32. . With such a configuration, when the liquid chamber valve seat portion 26a rises as the nozzle head 22 rises and comes into contact with the locking portion 38a, the locking portion 38a is brought into contact with the liquid chamber valve seat portion 26a by frictional resistance. Since it is pressed, there is no problem that the locking portion 38a that comes into contact with the valve seat portion 26a is lifted, and the sealing can be suitably performed.

  That is, the cylindrical locking body 32 is erected in a state where it is supported by the pedestal portion 24d below the liquid cylinder 24A, and an annular receiving portion 32a is formed at the lower end portion thereof. In addition, an upper cylindrical portion 32b is provided above the annular receiving portion 32a. The cylindrical opening portion 32b is provided with a plurality of longitudinal opening grooves (or split grooves) serving as liquid passages, and the upper portion is completely (non-porous). A cylindrical portion 32c is formed. An inward annular protrusion 32d is subsequently formed at the upper end of the non-hole cylindrical portion 32c. The annular receiving portion 32a at the lower end is a receiving portion on the lower end side of the coil spring.

  The large-diameter portion 38b at the lower end of the rod-shaped valve body 38 is locked by an inward annular protrusion 32d formed at the upper end of the cylindrical locking body 32, and the rod-shaped valve body 38 is prevented from rising, thereby The upper limit positions of the liquid piston 26 and the air piston 28 urged upward by the coil spring are regulated in cooperation with the engagement of the locking portion 38a with the liquid passage valve seat 26a of the liquid piston 26. Has been. Note that the lower end portion of the cylindrical locking body 32 regulates the rising distance of the ball valve 34 in the primary valve.

<Operating state of pump-type discharge container>
It continues and demonstrates the operating state of the discharge pump body concerning this embodiment below.
FIG. 5 is an explanatory view of an operation state when the nozzle head of the pump type discharge container according to the present embodiment is moved up and down.

  In the pump-type foam discharge container of the present embodiment, the liquid is filled in the container body from the completion of the assembly until just before the consumer starts using, for example, as shown in FIG. The liquid piston 26 and the air piston 28 are raised to the top dead center position as a pump by the biasing force of the coil spring. From this state, when the consumer starts to use and repeatedly depresses the nozzle head 22, only air is sent to the discharge port 22c from the liquid chamber A where the liquid is not filled in the interior at first. At the same time, since the liquid in the container main body is sucked into the liquid chamber A, the liquid preparation in the container is gradually filled into the liquid chamber A. In this manner, the nozzle head 22 is repeatedly pushed down and the liquid preparation is filled into the liquid chamber A, whereby preparation for ejection is completed.

  When the nozzle head 22 is pushed down with the liquid preparation filled in the liquid chamber A, as shown in FIG. 5B, the liquid chamber A and the air piston 28 are lowered. By pressurizing the air chamber B, the foamable liquid from the liquid chamber A is fed into the mixing chamber C through the gap between the locking portion 38a of the rod-shaped valve body and the liquid chamber valve seat portion 26a. The air from the air chamber B is pumped to the mixing chamber C through the air passage D, and both are mixed in the mixing chamber C to form bubbles. The foam formed in the mixing chamber C subsequently passes through the sheet-like porous body 36 disposed in the foam passage E in the nozzle head 22 and is re-formed into a finer and more uniform foam. It is discharged from a bubble discharge port 22 c provided at the tip of the nozzle head 22.

  Here, as shown in FIG. 5B, in the discharge container 10 before use, when water adheres to the outer surface of the upright wall 20c, the reduced diameter tubular portion 22i is formed by pushing down the nozzle head 22. Since it moves downward while in contact with the upright wall 20c, the water adhering to the outer surface of the upright wall 20c is scraped downward.

  Then, as shown in FIG. 5C, when the nozzle head 22 is released from being pushed down and the nozzle head 22 is moved upward by the biasing force of the coil spring, the liquid chamber A and the air chamber B are depressurized. Since the liquid in the container body 12 is sucked into the liquid chamber A, the inside of the container body 12 is also decompressed. Here, since the nozzle head 22 of the present embodiment is provided with an intake hole 22d communicating with the outside, the inside of the air chamber B and the container main body 12 through the communication hole 22g and the ventilation space F from the intake hole 22d. Outside air is introduced inside. At this time, since the inside of the ventilation space F is in a decompressed state, if there is a gap between the lower end of the outer cylindrical portion 22b of the nozzle head 22 and the upright wall 20c of the base cap 20, the outside air is sucked from this gap. As a result, water on the outer surface of the container may enter. In particular, when the discharge container is used under high humidity conditions such as in a bathroom, there is a high possibility that water will adhere to the outer surface of the upright wall 20c.

  However, in the present embodiment, as shown in FIG. 5C, the lower end of the reduced diameter cylindrical portion 22 i of the nozzle head 22 is in contact with the upright wall 20 c of the base cap 20, and is closed without a gap. Therefore, external water does not enter the ventilation space F from here. Further, since the reduced diameter cylindrical portion 22i is in a state of being inclined toward the lower inner direction and is always pressed against the upright wall 20c, the nozzle head is repeatedly pressed by the nozzle head or by an external impact. Even when the 22 axes are inclined, a gap is unlikely to occur. In addition, as shown in FIG. 5 (c), when the nozzle head 22 is released and the container is restored, the ventilation space F is in a reduced pressure state. Since pressure acts so as to be pressed against the upright wall 20c, a gap is less likely to occur. Further, by providing the reduced diameter cylindrical portion 22i in this way, external water inhalation at the time of restoring the container is prevented, but the contact area is very large because it is in contact with the upright wall 20c only at the lower end thereof. Since it becomes narrower and the sliding resistance when the nozzle head 22 moves up and down is small, it can be easily pushed down with a light force.

  As mentioned above, although one Embodiment of the pump type foam discharge container concerning this invention was described, this invention is not limited only to the specific structure shown in the said embodiment. In particular, the pump-type discharge container of the above embodiment is a foam discharge container, and is a container that mixes foamable liquid contained in the container with air and discharges it in the form of foam. The liquid discharge container is not limited to a container and may be any liquid discharge container that discharges the liquid in the container body. Further, the other pump mechanisms are not limited to the mechanism shown in the above embodiment, and can be implemented by other conventionally known pump mechanisms, and other components are used for specific purposes. It is possible to change the design appropriately according to the above.

DESCRIPTION OF SYMBOLS 10 Pump type discharge container 12 Container main body 14 Discharge pump body 16 Pipe body 20 Base cap 22 Nozzle head 24 Double cylinder (24A: Liquid cylinder, 24B: Air cylinder)
26 Piston for liquid 28 Piston for air 30 Ball valve 32 Cylindrical locking body 34 Elastic valve body 36 Porous body holder 38 Rod-shaped valve body

Claims (6)

A liquid contained in the container body by moving up and down a nozzle head part provided above the container body and a discharge pump body mounted on the mouth of the container body. Is a pump-type discharge container for discharging from a discharge port provided in the nozzle head part,
The discharge pump body is
A cylindrical liquid cylinder portion capable of communicating with the container body;
A cylindrical member that is slidable in contact with the inner wall surface of the liquid cylinder portion and can move up and down, and forms a gap with the liquid cylinder portion as a liquid chamber and moves upward in the container main body. A cylindrical liquid piston portion that sucks the liquid into the liquid chamber and pumps the liquid in the liquid chamber upward through an open end provided above the liquid chamber by moving downwardly;
A cylindrical member that can move up and down in conjunction with the liquid piston portion and communicates with the liquid chamber, and communicates with the liquid chamber below and to a discharge port provided at the end. It has a double cylinder structure consisting of a small-diameter inner cylindrical portion that communicates with a large-diameter outer cylindrical portion provided so as to cover the outside thereof, and the liquid in the liquid chamber is moved by its downward movement. A nozzle head part that flows into the inside through the upper opening end of the liquid piston part and discharges the liquid from the discharge port;
A skirt-like member provided so as to cover the upper part of the container main body and the lower part of the nozzle head part from the outside, comprising a small-diameter cylindrical part upright and a large-diameter cylindrical part expanded downward. A base cap portion that is detachably attached to the container main body by screwing the inner surface of the lower large-diameter cylindrical portion with the outer surface of the mouth portion of the container main body,
The nozzle head portion is formed with an intake hole capable of taking outside air into a space formed by the outer cylindrical portion and the inner cylindrical portion, and the outer cylindrical shape of the nozzle head portion. At the lower end of the portion, a flexible reduced-diameter cylindrical portion inclined downward and inward is integrally provided continuously, and above the base cap portion at the lower end of the reduced-diameter cylindrical portion. A pump-type discharge container that is in sliding contact with the outer surface of the small-diameter cylindrical portion.   The narrowest inner peripheral diameter at the lower end of the reduced diameter cylindrical portion of the nozzle head portion is 0.1 to 0.5 mm larger than the outer peripheral diameter of the small diameter cylindrical portion above the base cap portion in the state of a single component before assembly. 2. The pump-type discharge container according to claim 1, wherein the discharge container is small.   3. The pump according to claim 1, wherein the reduced diameter cylindrical portion of the nozzle head portion has a vertical length of 0.5 to 3.0 mm and an average thickness of 0.1 to 1.0 mm. Type discharge container.   In the reduced diameter cylindrical portion of the nozzle head portion, the lower tip portion is formed to have the smallest thickness, and the contact length with the outer surface of the upper small diameter cylindrical portion of the base cap portion at the lower tip portion The pump type discharge container according to any one of claims 1 to 3, wherein the length is 0.1 to 2.0 mm.   5. A notch-shaped slit is formed in the vertical direction of the reduced diameter cylindrical portion of the nozzle head portion or the upper small diameter cylindrical portion end of the base cap portion. Pump type discharge container according to crab. The pump type according to any one of claims 1 to 5, wherein an inclined surface is formed at an upper end of an upper small-diameter cylindrical portion of the base cap portion so as to be inclined downward in the outer peripheral surface direction. Discharge container.

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