JP6410317B2 - Pump container - Google Patents

Description

  The present invention relates to a pump container, particularly a pump container suitable as a push-type container having a large-diameter operation head.

  As this type of container, a container body that stands up the mouth-and-neck part, a cylinder member that includes a cylinder that is mounted on the mouth-and-neck part and is suspended in the container body, a cylindrical piston that slides on the inner surface of the cylinder, and a cylinder upper side The seal cylinder part formed on the upper end side of the vertical cylinder part is liquid-tightly fitted to the connecting cylinder part that hangs down from the lower surface side of the operation head. And an actuating member having a discharge port opened in the part, and by sucking the liquid from the container body into the cylinder through the first check valve by the vertical movement of the actuating member, the liquid in the cylinder is sucked into the second check valve What is comprised so that it may discharge from a discharge port via this is known (patent document 1).

JP 2010-274964 A

  In the above container, since the discharge port is always open, the contents attached to the edge surface of the discharge port may be solidified by drying or the like. In order to avoid this, it is known that a stopper is attached to the back surface of the top wall of the overcap that covers the operation head of the pump device to close the opening. However, it is troublesome to wear the overcap one by one, and there is a demand for a pump container that can be used without a sense of incongruity without giving the user the impression that it is unusable.

  An object of the present invention is to provide a pump-type container provided with a mechanism capable of reliably closing the discharge hole of the operation head without trouble.

The first means is a container body 2 that stands up the mouth and neck portion 6;
A cylinder member 20 including a cylinder 30 mounted on the mouth and neck portion 6 and suspended in the container body 2;
The cylinder 30 has a cylindrical piston 42 that slides on the inner surface of the cylinder 30 and has a vertical cylinder portion 41 that stands up above the cylinder 30. The upper end side of the vertical cylinder portion 41 is liquid-tightly fitted to the lower surface side of the operation head 70. An actuating member 40 having a discharge port 76 opened on the upper surface of the operation head 70;
With
As the operating member 40 moves up and down, the liquid is sucked from the container body 2 into the cylinder 30 through the first check valve V1, and the liquid in the cylinder 30 is discharged from the discharge port 76 through the second check valve V2. A pump container configured to:
A plug body 80 disposed inside the operation head 70 and pressed against the back surface of the peripheral portion 78 of the discharge port 76 in an upward biased state to close the discharge port 76 is provided.
A pressing surface D for lowering the plug 80 by pressing down the operating head 70 on the back surface around the discharge port 76 of the operating head 70;
A pair of first engagements formed so as to slide relative to each other and rotate the plug body 80 in the circumferential direction by lowering the plug body 80 at corresponding positions on the lower surface of the plug body 80 and the upper end side of the vertical cylinder portion 41. Surfaces S1U, S1L,
A pair of slides formed to slide downward relative to the operation head 70 by the rotation of the plug body 80 at corresponding positions between the back side of the operation head 70 and the upper surface of the plug body 80. Second engagement surfaces S2U, S2L;
Provided,
The discharge port 76 is configured to be closed when the operation head 70 is pushed down and released.

  This means proposes a mechanism capable of opening and closing the discharge port 76 of the operation head 70 shown in FIG. The plug body 80 is in pressure contact with the back surface of the peripheral portion 78 of the discharge port 76 in an upward biased state, and a pair of first engagement surfaces S1U formed by the lower surface of the plug body 80 and the upper end side of the vertical cylinder portion 41. , S1L, and a pair of second engagement surfaces S2U and S2L formed by the back surface side of the operation head 70 and the upper surface of the plug body 80 so as to open and close the plug body 80 following the pressing operation of the operation head 70. Provided.

The second means includes the first means, and the discharge port 76 has a circular shape when viewed from above, and a convex plug that can be fitted into the discharge port 76 at the center of the upper surface of the plug body 80. A portion 82b is formed, and the stopper portion 82b is provided so that it can be detached from or fitted to the discharge port 76 while rotating.

As shown in FIG. 2, this means is configured such that the discharge port 76 is circular as viewed from above, and the plug portion 82b is attached to and detached from the discharge port while rotating. Thereby, it is made hard to produce the deposit | attachment to the edge of the discharge outlet 76. FIG.
The “fitting” of this means includes not only the close fitting as shown in FIG. 3 but also the loose fitting with a slight gap. In the latter configuration, no force acts between the outer peripheral surface of the plug portion and the mouth surface of the discharge port, so that the pressing surface D shown in FIG. 3 is strongly pressed against the plug body 80 and the sealing performance is improved.

The third means has the second means, and the back surface of the peripheral portion 78 of the discharge port 76 is recessed corresponding to the shape of the outer peripheral portion 82a of the plug 80, and the upper surface of the outer peripheral portion 82a. And the back surface of the peripheral portion 78 are in close contact with each other, and when the operation head 70 is pushed down, the back surface of the peripheral portion 78 presses down the plug 80 as the pressing surface D.

  This means proposes that the back surface of the peripheral portion 78 of the discharge port 76 shown in FIG. Thereby, the plug 80 can be pressed down stably and reliably.

The fourth means includes any one of the first means to the third means, and the vertical cylinder portion 41 is attached to the lower outer surface of the bottomed cylindrical piston guide 44 so as to be movable up and down. A cylindrical piston 42 is provided so as to slide on the inner surface of the cylinder 30, and the lower half is fitted to the upper part of the piston guide 44 so that the stem 46 stands up above the cylinder 30,
An operation head 70 is connected to the upper portion of the stem 46, and
The valve seat 44 c formed at the lower part of the piston guide 44 and the lower part of the cylindrical piston 42 form a second check valve V 2, and the second check valve V 2 is a liquid formed inside the piston guide 44. It is formed so as to communicate with the discharge port 76 via the passage,
A volume adjusting mechanism 94 is provided in the piston guide 44 to increase the volume of the liquid passage due to the generation of the internal pressure of the piston guide 44 and to return the volume of the liquid passage to the original state when the internal pressure of the piston guide 44 is eliminated. It was.

  This means employs a stem 46 and a piston guide 44 as a configuration of the operating member 40, and a volume adjusting mechanism is provided inside the piston guide 44. This is because if such a mechanism is not provided, when the liquid is filled from the second check valve V2 to the plug body 80, the plug body 80 cannot be lowered and a malfunction may occur.

The fifth means includes the fourth means, and the volume adjusting mechanism 94 includes a horizontal partition wall 96 in which the outer peripheral portion of the piston guide 44 is closely fitted to the lower portion of the inner surface of the piston guide 44 so as to be movable up and down. It consists of a plurality of spring plates 98 protruding from the lower surface.

  In this means, it is proposed that the volume adjusting mechanism 94 has a simple structure in which a spring plate 98 is attached to the back surface of the partition wall 96 as shown in FIG.

According to the invention relating to the first means, the pair of first engagement surfaces S1U and S1L formed by the lower surface of the plug body 80 and the upper end side of the vertical cylinder portion 41, the back surface side of the operation head 70, and the plug body 80. When the operation head 70 is pushed down by the pair of second engagement surfaces S2U and S2L formed by the upper surface of the plug, the plug body 80 is further lowered with respect to the operation head 70 to open the discharge port 76. Therefore, the contents are hardly solidified around the discharge port 76.
According to the invention relating to the second means, since the convex plug portion 82b formed at the center of the upper surface of the plug body 80 is fitted into the discharge port 76 that is circular when viewed from above, the plug portion 82b is It can be incorporated in the form of the operation head 70 so as to have a uniform appearance, and the plug portion 82b is detached from or fitted into the discharge port 76 while rotating. Is hard to solidify.
According to the third aspect of the invention, the back surface of the peripheral portion 78 of the discharge port 76 is recessed corresponding to the shape of the outer peripheral portion 82 a of the plug 80, and the upper surface of the outer peripheral portion 82 a and the peripheral portion 78. Since the back surface is brought into close contact, the sealing performance is improved, and the back surface of the peripheral portion 78 of the discharge port 76 pushes down the plug body 80 as the pressing surface D. Therefore, stable pressing is possible.
According to the fourth aspect of the invention, since the volume adjusting mechanism 94 is provided in the piston guide, the plug portion is filled with liquid even if the flow path portion from the second check valve V2 to the discharge port 76 is filled. The body 80 can be separated from the discharge port 76.
According to the fifth aspect of the invention, the volume adjusting mechanism 94 is provided so as to protrude from the lower surface of the partition wall 96 and the horizontal partition wall 96 in which the outer peripheral portion can be moved up and down in close contact with the lower inner surface of the piston guide 44. Since it is formed with a plurality of spring plates 98, the volume adjusting function can be sufficiently exhibited while having a simple configuration.

It is a longitudinal cross-sectional view of the pump container which concerns on 1st Embodiment of this invention. It is a top view of the pump container of FIG. FIG. 3 is a partially enlarged view of a cross section of the pump container as seen from the III-III direction in FIG. 2. FIG. 4 is a partially enlarged view of a cross section of the pump container viewed from the IV-IV direction in FIG. 2. It is a perspective view of one component (plug body) of the pump container of FIG. FIGS. 2A and 2B are diagrams showing each stage of the use state of the pump container of FIG. 1, in which FIG. 1A shows an initial stage, and FIG. 2B shows a stage in which a discharge port is opened by pushing down an operation head. (C) shows the stage where the operating member has reached the lower limit. Corresponding to (A), (B), and (C) of FIG. 6, the main part of the present invention is shown. It is action | operation explanatory drawing of another principal part of the container of FIG.

  1 to 8 show a pump container according to an embodiment of the present invention. The container includes a container body 2, a mounting member 10, a cylinder member 20, a retaining member 34, and an operating member 40. These members can be made of, for example, synthetic resin or metal.

The container body 2 is comprised by the container part 3 and the inner tray 8 in this embodiment.
The container part 3 stands up from the bottomed cylindrical body part 4 with a small outer diameter neck 6. The inner diameters of the body 4 and the mouth-and-neck 6 are the same, so that the inner tray 8 can be inserted from above.
Further, the inner tray 8 is provided on the outer peripheral portion of the sliding portion 8 a slidable on the inner surface of the body portion 4, and is formed so as to be lifted by the negative pressure in the container portion 3.
However, these shapes can be changed as appropriate.

  The mounting member 10 is mounted on the mouth / neck portion 6, and a peripheral wall portion 22 of a cylinder member 20 described later is fixed to the mouth / neck portion 6 via the mounting member 10. In the illustrated example, the lower part of the mounting cylinder part 12 is fitted (screwed in the illustrated example) to the outer surface of the mouth-and-neck part 6, and the upper part of the mounting cylinder part 12 is reduced in diameter from the lower part through the stepped part. The lower wall of the step portion and the upper surface of the mouth-and-neck portion 6 are formed so as to sandwich a later-described flange portion 24 and packing P of the peripheral wall portion 22. Further, the folded tube portion 14 protrudes inward and downward from the upper end of the mounting tube portion 12, and the folded tube portion 14 is fitted to the upper inner surface of the peripheral wall portion 22.

  The cylinder member 20 connects the inner end of the bottom wall portion 26 that protrudes inward from the lower surface of the peripheral wall portion 22 to the cylindrical wall 30 a of the cylinder 30. A collar portion 24 is provided around the middle portion of the peripheral wall portion 22 in the vertical direction. An inward flange 30b projects inwardly from the lower end of the cylindrical wall 30a.

  A first check valve body 32 is attached in the bottom of the cylinder 30. The first check valve body 32 in the illustrated example is formed by supporting a valve plate with a plurality of elastic support pieces projecting inwardly from a frame body fitted to the lower part of the inner surface of the cylinder wall 30 a of the cylinder 30. The valve plate and the inward flange 30b of the cylinder 30 form a first check valve V1. However, these structures can be changed as appropriate.

  Further, an auxiliary cylinder portion 28 surrounding the cylinder 30 is erected from the upper surface of the bottom wall portion 26. A plurality of vertical ribs 28a for fixing a first coil spring 66, which will be described later, are provided vertically outside the auxiliary cylinder portion 28. Further, a retaining rib 28 b is provided around the upper surface of the inner surface of the auxiliary cylinder portion 28.

  The retaining member 34 folds the retaining tubular portion 34b downward from the upper end of the fitting cylindrical portion 34a and projects a tapered tubular portion 34c upward and outward from the lower end of the fitting cylindrical portion 34a. The fitting cylinder portion 34a is fitted on the outer surface of the cylinder wall 30a of the cylinder 30, and the retaining cylinder portion 34b is fitted on the outer surface of the cylinder wall 30a of the cylinder 30 (see FIG. 8). The upper end of the tapered cylindrical portion 34c is engaged with the lower surface of the retaining rib 28b.

  The operating member 40 is configured by attaching an operation head 70 to the upper end of a vertical cylinder portion 41 in which a lower half portion is inserted into the cylinder 30.

  The vertical cylinder portion 41 is formed by a cylindrical piston 42, a piston guide 44, and a stem 46.

  The cylindrical piston 42 is formed by connecting an intermediate portion in the vertical direction between the outer cylindrical portion 42a and the inner cylindrical portion 42b by a connecting portion 42c. The upper and lower ends of the outer cylinder part 42 a are in sliding contact with the inner surface of the cylinder wall 30 a of the cylinder 30.

  As shown in FIG. 8, the piston guide 44 closes the lower end of the vertical pipe portion 44b with a bottom plate portion 44a, and extends the bottom plate portion 44a outward to form a valve seat 44c. Further, a liquid passage hole 44d is opened at the lower portion of the vertical pipe portion 44b.

  A cylindrical piston 42 is disposed so as to surround the lower portion of the piston guide 44, and the cylindrical piston 42 is disposed between the lower end of the stem 46 fitted to the upper portion of the piston guide 44 and the valve seat 44c. The piston guide 44 is provided so as to be movable up and down. The lower end of the inner cylinder part 42b of the cylindrical piston 42 and the upper surface of the valve seat 44c form a second check valve V2.

  The stem 46 is fitted to the upper part of the piston guide 44 and stands up above the cylinder 30. The lower end portion of the stem 46 forms a large inner diameter portion 48, and the upper end of the inner cylinder portion 42 b of the cylindrical piston 42 is slidably fitted into the large inner diameter portion 48. The stem 46 is biased upward by a first coil spring 66 described later.

The operation head 70 is fitted to the upper end portion of the stem 46. In the illustrated example, the operation head 70 has a top plate portion 73 that opens a discharge port 76 at the center, and a head peripheral wall 72 is suspended from a peripheral end portion of the top plate portion 73. The head peripheral wall 72 is inserted into the peripheral wall portion 22 of the cylinder member 20 so as to be movable up and down. The lower end of the head peripheral wall 72 is provided with a locking rib 72a that is locked to the lower end of the folded tube portion 14 to prevent the operation head 70 from coming off. The discharge port 76 communicates with the inside of the stem 46.
For convenience of explanation, the detailed configuration of the present invention will be described later, and the operation of the matters described so far will be described.

  When the operation head 70 is pushed down from the state of FIG. 1, the operating member 40 descends against the urging force of the first coil spring 66, and the second check valve V2 opens. Then, the liquid in the cylinder 30 is discharged from the discharge port 76 to the outside through the second check valve V2, the liquid passage hole 44d, and the inside of the longitudinal pipe portion 44b of the piston guide. In the present invention, there is a process in which a plug body, which will be described later, descends with respect to the operating head after the operating head 50 is pushed down until the operating member descends. This will be described in detail later.

  When the pressing of the operation head 70 is released, the operating member 40 is raised by the urging force. At this time, the cylindrical piston 42 rises behind the stem 46 and the piston guide 44 in order to make sliding contact with the inner surface of the cylinder 30. Accordingly, the cylindrical piston 42 is relatively lower than the piston guide 44 and the like, and thus the second check valve V2 is closed. Since the operating member 40 moves up even after the second check valve V2 is closed, the inside of the cylinder 30 becomes negative pressure, whereby the first check valve V1 is opened, and the liquid in the container part 3 enters the cylinder 30. Sucked.

  In the present invention, first, the locking cylinder portion 50 is folded back from the upper end portion of the stem 46 inward and downward as shown in FIG. The locking cylinder portion 50 is fitted on the inner surface of the upper end of the vertical tube portion 44 b of the piston guide 44, and the locking claw 50 a protrudes inward from the inner surface of the locking cylinder portion 50.

  Further, a seal cylinder portion 54 is suspended from an upper end portion of the stem 46 via an outward flange 52, and an extension plate portion 56 is extended outward from the lower end of the seal cylinder portion 54.

  Then, the small-diameter connecting cylinder part 75 and the large-diameter stopper cylinder part 74 are suspended from the back surface of the top plate part 73 of the operation head 70 in a double cylinder shape. The seal cylinder portion 54 is liquid-tightly fitted to the inner surface of the connecting cylinder portion 75, and the extension plate portion 56 is in contact with the inner surface of the stopper cylinder portion 74. Anti-rotation means T is formed at this contact location. In the illustrated example, the anti-rotation means T is formed by the vertical ribs 60 provided on the outer surface of the extension plate portion 56 and the vertical grooves 74a formed on the inner surface of the stopper cylinder portion 74. You may form a groove | channel and a vertical rib in the stopper cylinder part side, respectively.

  In the illustrated example, a skirt-like seal portion 54 a is formed on the upper portion of the seal tube portion 54, and this seal portion 54 a is slidably in close contact with the inner surface of the connecting tube portion 75. Further, as shown in FIG. 1, the outer peripheral portion of the illustrated extension plate portion 56 is formed higher than the inner peripheral portion, and an annular fitting concave portion 58 is provided around the rear surface of the outer peripheral portion. In the present embodiment, the first coil spring 66 is interposed between the extension plate portion 56 and the bottom wall portion 26 of the cylinder member. The lower end portion of the first coil spring 66 is provided with the retaining rib 28b. The upper end portion of the first coil spring 66 is fitted into the fitting recess 58 and is fitted to the outer surface of the auxiliary cylinder portion 28 provided vertically. The first coil spring 66 can be formed of metal or synthetic resin.

  A plug 80 for closing the discharge port 76 is provided between the upper end portion of the stem 46 and the discharge port 76 of the top plate portion 73. In the illustrated example, the plug body 80 is formed by a horizontal plug plate 82 and a plug cylinder 84 that hangs down from the lower surface of the plug plate 82 as shown in FIG. The plug cylinder 84 may be a cut-out part of the cylinder wall in the circumferential direction. And while inserting the upper end part of the 2nd coil spring 92 in the plug cylinder 84, the lower end of the 2nd coil spring 92 is installed on the latching claw 50a of the said latching cylinder part 50, and the plug body 80 is moved upwards. Energized. In the illustrated example, the central portion of the plug plate 82 is formed as a plug portion 82 b protruding upward as compared to the outer peripheral portion 82 a of the plug plate 82. Further, the upper surface of the outer peripheral portion 82a is formed such that an inner portion thereof is an annular horizontal surface and an outer portion thereof is a tapered surface. The elastic force of the second coil spring 92 is assumed to be weaker than that of the first coil spring 66. The second coil spring 92 can be formed of a synthetic resin.

  The planar shape of the plug portion 82b and the discharge port 76 is circular. The lower surface of the peripheral portion 78 of the discharge port 76 is recessed so as to match the shape of the outer peripheral portion 82 a of the stopper plate 82. This lower surface has a function as a pressing surface D for pressing down the plug 80.

  From the lower surface of the plug plate 82 of the plug body 80, an upper first engagement protrusion 86 is provided with a constant interval in the circumferential direction. In the illustrated example, the upper first engaging projection 86 and the plug cylinder 84 are integrated to ensure strength (see FIG. 5).

  Furthermore, a lower first engaging protrusion 64 protrudes upward from the upper peripheral end of the stem 46 at a constant interval in the circumferential direction.

  The upper first engagement protrusion 86 has a trapezoidal shape with one side inclined when viewed from the radial direction (see FIG. 7A), and has an upper first engagement surface S1U inclined corresponding to the oblique side. . Each engagement surface is formed to face one side in the circumferential direction. Similarly, the lower first engagement protrusion 64 has a trapezoidal shape with one side being an inclined surface when viewed from the radial direction of the stem 46, and has a lower first engagement surface S1L inclined corresponding to the oblique side. . Each engagement surface is formed to face the other circumferential direction. The upper first engagement surface S1U and the lower first engagement surface S1L are provided so as to slide with each other and rotate the plug body 80 when the operation head 70 is pushed down. In the illustrated example, the inclination angles of the upper first engagement surface S1U and the lower first engagement surface S1L are equiangular, but they are not necessarily equal. Furthermore, it is not always necessary to use both of them as inclined surfaces, and for example, a combination of an inclined surface and an arc surface may be used.

  Further, as shown in FIG. 4, the arm portion 88 protrudes horizontally outward from the plug body 80, and the lower second engaging protrusion 90 is erected from the tip portion of the arm portion 88. The upper second engaging projection 79 is suspended from the corresponding position on the back surface of the plate portion 73. The lower second engagement protrusion 90 has a lower second engagement surface S2L, and the upper second engagement protrusion 79 has an upper second engagement surface S2U. The upper second engagement surface S2U and the lower first engagement surface S1L are provided to slide with each other and rotate the plug body 80 when the plug body 80 rotates. The inclination angle of the second engagement surface may be the same as the inclination angle of the first inclination angle. Moreover, the description which concerns on the form of a 1st engagement surface is used for a 2nd engagement surface.

  The first engagement surfaces S1U, S1L and the second engagement surfaces S2U, S2L are preferably equiangular (90 ° in the illustrated example), spaced from each other as seen from above, as shown by the dotted lines in FIG. It is desirable to arrange every).

FIG. 6 shows each stage of the discharge operation, where FIG. 6A shows the initial stage, and FIG. 6B shows the stage where the operation head 70 is pushed down to the extent that the discharge port 76 opens. Respectively show the stages in which the operating head 70 is pushed down until the operating member 40 reaches the lower limit position.
FIG. 7 shows operations of the first engagement surfaces S1U and S1L and the second engagement surfaces S2U and S2L at each stage of the discharge work. These figures schematically represent a form in which each engagement surface is viewed from the side outward in one plane.

  When the operation head 70 is pushed down, a pressing force F acts on the plug 80 via the pressing surface D (see FIG. 7A). Since the elastic force of the second coil spring 92 is smaller than the elastic force of the first coil spring 66, only the plug body 80 of the operating member 40 is first lowered. Since the plug body 80 is lowered and the first engagement surfaces S1U and S1L slide and stresses f1 in the circumferential direction act from these engagement surfaces, the plug body 80 rotates in the circumferential direction. When the plug body 80 rotates, the second engagement surfaces S2U and S2L slide, and a downward stress f2 acts from these engagement surfaces, so that the plug body 80 further descends with respect to the top plate portion 73. . As a result, the discharge port 76 is opened as shown in FIG. In this state, the second check valve V2 of the pump container remains closed. When the operation head 70 is further pushed down from FIG. 7B, the plug body 80 cannot be lowered from the state shown in FIG. 7 with respect to the operation head 70, so that the first coil spring 66 starts to be compressed. As a result, the entire operating member 40 is lowered and the second check valve V2 is opened. Thereafter, a pumping action is produced in the same process as that of a normal pump container.

  When the push-down of the operation head 70 is released, the discharge port 76 is closed while the plug body 80 is rotated by the procedure shown in FIGS. 7 (C) → (B) → (A) by the elastic restoring force of the second coil spring 92. Return to the position to perform.

  In the present invention, a volume adjusting mechanism 94 for adjusting the internal volume of the liquid passage formed in the piston guide 44 is provided at the lower end of the piston guide 44 (see FIG. 8). As described above, the reason why such a mechanism is provided is that, in the present invention, the discharge port 76 of the top plate portion 73 is opened and closed by the plug body 80 that moves up and down below the discharge port formation location. When the entire flow path from the discharge port 76 to the second check valve V2 is filled with an incompressible liquid in a state in which the plug 76 is closed, the plug body 80 remains even if the operation head 70 is pushed down. This is because there is a possibility that the inconvenience of not leaving the discharge port 76 may occur.

  The volume adjusting mechanism 94 in the illustrated example includes a horizontal partition 96 that partitions the lower end portion of the inside of the piston guide 44 from the remaining portion, and a plate spring 98 protruding from the lower end of the partition 96. A space between the partition wall 96 and the bottom plate portion 44a of the piston guide 44 is an air chamber. A cylindrical seal wall portion 96a is provided around the partition wall 96 so that liquid does not enter the space, and the seal wall portion 96a is slidably in close contact with the inner surface of the vertical tube portion 44b. A portion of the inside of the piston guide 44 above the upper surface of the partition wall 96 is a liquid passage inside the piston guide.

  When the operation head 70 is pushed down, the leaf spring 98 is deformed and the partition wall 96 is lowered as shown by an imaginary line in FIG. 8, so that the internal volume of the liquid passage in the piston guide 44 is increased. The plug body 80 can be lowered.

  When the piston guide is not used as the mechanism of the pump container, an air chamber partitioned by a partition from the liquid passage is formed in any of the passages from the second check valve V2 to the discharge port 76 in the same way. An elastic means that supports the pressure in the liquid flow path may be provided.

DESCRIPTION OF SYMBOLS 2 ... Container body 3 ... Container part 4 ... Torso part 6 ... Mouth neck part 8 ... Middle dish 8a ... Sliding part 10 ... Mounting member 12 ... Mounting cylinder part 14 ... Folding cylinder part 20 ... Cylinder member 22 ... Peripheral wall part 24 ...鍔 part 26 ... bottom wall part 28 ... auxiliary cylinder part 28a ... vertical rib 28b ... retaining rib 30 ... cylinder 30a ... cylindrical wall 30b ... inward flange 32 ... first check valve body 34 ... retaining member 34a ... fitting Placed cylinder part 34b ... Detaching cylinder part 34c ... Tapered cylinder part 40 ... Actuating member 41 ... Vertical cylinder part 42 ... Cylindrical piston 42a ... Outer cylinder part 42b ... Inner cylinder part 42c ... Connecting part 44 ... Piston guide 44a ... Bottom plate portion 44b ... Vertical tube portion 44c ... Valve seat 44d ... Fluid passage hole 46 ... Stem 48 ... Large inner diameter portion 50 ... Locking cylinder portion 50a ... Locking claw 52 ... Outward flange 54 ... Seal tube portion 54a ... Seal portion 56 ... Extension plate 58 ... Fitting recess DESCRIPTION OF SYMBOLS 0 ... Vertical rib 62 ... Contact | abutting cylinder part 64 ... Lower side 1st engaging protrusion 66 ... 1st coil spring 70 ... Operation head 72 ... Head peripheral wall 72a ... Locking rib 73 ... Top plate part 74 ... Stopper cylinder part 74a ... Vertical groove 75 ... Connecting cylinder part 76 ... Discharge port 78 ... Ambient part 79 ... Upper second engaging protrusion 80 ... Plug body 82 ... Plug plate 82a ... Outer peripheral part 82b ... Plug part 84 ... Plug cylinder 86 ... Upper first Engaging projection 88 ... arm portion 90 ... lower second engaging projection 92 ... second coil spring 94 ... volume adjusting mechanism 96 ... partition 96a ... seal wall portion 98 ... leaf spring D ... pressing surface L ... liquid passage P ... packing R ... liquid passage S1L, S1U ... first engagement surface S2L, S2U ... second engagement surface T ... anti-rotation means V1 ... first check valve V2 ... second check valve

Claims (5)

A container body (2) that stands up the mouth and neck (6);
A cylinder member (20) including a cylinder (30) mounted on the mouth and neck (6) and suspended in the container body (2);
It has a cylindrical piston (42) that slides on the inner surface of the cylinder (30) and a vertical cylindrical portion (41) that stands up above the cylinder (30). The upper end of the vertical cylindrical portion (41) is connected to the operation head. An operating member (40) which is liquid-tightly fitted to the lower surface side of (70) and has an opening (76) opened on the upper surface of the operation head (70);
With
As the operating member (40) moves up and down, the liquid is sucked from the container body (2) into the cylinder (30) via the first check valve (V1), and the liquid in the cylinder (30) is sucked into the second check valve. A pump container configured to discharge from a discharge port (76) via a valve (V2),
A plug body (80) disposed inside the operation head (70) and pressed against the back surface of the peripheral portion (78) of the discharge port (76) in an upwardly biased state to close the discharge port (76) is provided.
A pressing surface (D) for lowering the plug (80) by pushing down the operating head (70) on the back surface around the discharge port (76) of the operating head (70);
As the plug body (80) descends to the corresponding positions on the lower surface of the plug body (80) and the upper end side of the vertical tube portion (41), the plug body (80) slides to rotate in one circumferential direction. A pair of formed first engagement surfaces (S1U, S1L);
The plug (80) is slid relative to the operation head (70) by rotating the plug (80) at the corresponding position between the back side of the operation head (70) and the upper surface of the plug (80). A pair of second engagement surfaces (S2U, S2L) formed so as to be further lowered,
A pump container characterized in that the discharge port (76) is closed by releasing the operation head (70).   The discharge port (76) is circular when viewed from above, and a convex plug portion (82b) that can be fitted into the discharge port (76) is formed at the center of the upper surface of the plug body (80). A pump container characterized by being provided so that the stopper (82b) can be detached from or fitted to the discharge port (76) while rotating.   The back surface of the peripheral portion (78) of the discharge port (76) is recessed corresponding to the shape of the outer peripheral portion (82a) of the plug (80), and the upper surface and the peripheral portion (78 of the outer peripheral portion (82a) are formed. When the operation head (70) is pressed down while the back surface is brought into close contact with the back surface, the back surface of the peripheral portion (78) is configured to press down the plug body 80 as the pressing surface (D). 2. The pump container according to 2. The vertical cylinder portion (41) is configured so that the cylindrical piston (42) mounted so as to be movable up and down relative to the lower outer surface of the bottomed cylindrical piston guide (44) slides on the inner surface of the cylinder (30). The lower half is fitted to the upper part of the piston guide (44), and the stem (46) is raised above the cylinder (30).
An operating head (70) is connected to the upper portion of the stem (46), and
The valve seat (44c) formed at the lower part of the piston guide (44) and the lower part of the cylindrical piston (42) form a second check valve (V2), and this second check valve (V2) is Formed so as to communicate with the discharge port (76) via a liquid passage formed inside the piston guide (44);
In the piston guide (44), the volume of the liquid passage is increased by generating the internal pressure of the piston guide (44), and the volume of the liquid passage is restored to the original state by eliminating the internal pressure of the piston guide (44). The pump container according to any one of claims 1 to 3, wherein a volume adjusting mechanism (94) is provided.   The volume adjusting mechanism (94) includes a horizontal partition wall (96) in which an outer peripheral portion thereof can be moved up and down and closely fitted to a lower portion of the inner surface of the piston guide (44), and a plurality of protrusions projecting from the lower surface of the partition wall (96). The pump container according to claim 4, characterized in that it comprises a spring plate (98).