Discharge cap and pump-type discharger

Abstract

We propose a dispensing cap that prevents outside air from being drawn into the container when the slit is closed, and requires less force to dispense compared to conventional caps. [Solution] The discharge cap 100A is attached to the mouth 151 of a container 150 that contains the liquid contents and comprises a cap body 1 having a cap opening 1e located inside the mouth 151, a slit valve 2A having a partition wall 2d provided inside the cap opening 1e and having a curved shape that protrudes in a direction along the central axis O of the mouth 151 and is elastically deformable, and a slit 2e that penetrates the partition wall 2d in the thickness direction, a support wall 3d that has a curved shape along the back surface of the partition wall 2d and supports the back surface, and a communication opening 3e that penetrates the support wall 3d in the thickness direction, and a holding member 3A that holds the slit valve 2A between itself and the cap body 1.

Description

Technical Field

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[0001] The present invention relates to a discharge cap including a cap body attached to the mouth of a container and a slit valve for discharging the content liquid of the container, and a pump-type discharger using the technology related to this slit valve.

Background Art

[0002] Conventionally, as a cap attached to a container for storing cosmetics or food seasonings, a discharge cap including a cap body and a slit valve is known (see, for example, Patent Document 1). The slit valve is formed of a soft material such as rubber or elastomer, and a slit (cut) penetrating the partition wall in the thickness direction is provided in the elastic deformable partition wall. Then, when the body of the container or the like is pressed to pressurize the inside of the container, the slit opens and the content liquid can be discharged to the outside.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in order to prevent outside air from being taken into the container when the opened slit closes or when the slit is maintained in a closed state, the conventional slit valve increases the self-closing force of the slit by thickening the thickness of the partition wall provided with the slit or shortening the length of the slit. However, in this case, when discharging the content liquid, the container has to be pressed with a relatively strong force, which is difficult in terms of operability. In addition, when pressing the container to discharge the content liquid, the gap of the opened slit is relatively narrow, so that the content liquid may be difficult to come out.

[0005] In view of these points, the present invention aims to provide a discharge cap that can prevent outside air from being drawn into the container through the slit and requires less force to discharge compared to conventional caps. In addition, the present invention aims to provide a pump-type dispenser that uses the technology related to the slit valve used in this discharge cap. [Means for solving the problem]

[0006] The discharge cap of the present invention is fitted to the mouth of a container that holds liquid contents and comprises a cap body having a cap opening located inside the mouth; a slit valve having a partition wall provided inside the cap opening and having a curved shape that protrudes in a direction along the central axis of the mouth and is elastically deformable, and a slit that penetrates the partition wall in the thickness direction; a support wall having a curved shape that supports the back surface of the partition wall, and a communication port that penetrates the support wall in the thickness direction, and a holding member that holds the slit valve between itself and the cap body. [Effects of the Invention]

[0007] In the discharge cap of the present invention, the partition wall with the slit is supported on its back surface by a support wall, and its curvature increases the rigidity of the partition wall compared to a flat one. That is, the partition wall around the slit is less likely to elastically deform toward the inside of the container, thus preventing outside air from being drawn into the container through the slit. Furthermore, since it is no longer necessary to increase the self-closing force as much as before to prevent outside air from being drawn into the container, it becomes possible to reduce the thickness of the partition wall, for example, thereby reducing the force required during discharge. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view cross-sectional view showing the first embodiment of the dispensing cap according to the present invention attached to the mouth of a container. [Figure 2A] This is a plan view of the retaining member shown in Figure 1. [Figure 2B]This is a plan view of a modified example of the retaining member shown in Figure 2A. [Figure 3A] This figure shows the movement of the partition wall around the slit when the liquid contents are being dispensed from the discharge cap shown in Figure 1. [Figure 3B] This figure shows the movement of the partition wall around the slit in the dispensing cap shown in Figure 1 after the dispensing of the liquid contents has finished. [Figure 3C] This diagram shows the movement of the partition wall around the slit after the liquid has been dispensed, in the case where no support wall is provided. [Figure 4A] This is a plan view showing the relationship between the inner diameter of the communication opening and the length of the slit when the communication opening is located directly below the intersection of the slits. [Figure 4B] This is a cross-sectional view from the side of Figure 4A. [Figure 5] This is a side view cross-sectional view showing a second embodiment of the dispensing cap according to the present invention, attached to the mouth of a container. [Figure 6] This is a cross-sectional view showing a side view of one embodiment of a pump-type discharger according to the present invention, where the right side of the central axis O1 shows the state before the head is pressed, and the left side shows the state after the head has been pressed. [Figure 7] Figure 6 is a plan view of the pump-type discharger. [Figure 8] Figure 6 is a front view of the pump-type discharger. [Modes for carrying out the invention]

[0009] Hereinafter, an embodiment of the discharge cap and pump-type discharger according to the present invention will be described in detail with reference to the drawings. In the following description, the vertical direction refers to the direction along the central axes O and O1 shown in the drawings. In the following description, components whose material is not specifically mentioned are basically made of a hard synthetic resin.

[0010] First, a first embodiment of the discharge cap according to the present invention, the discharge cap 100A, will be described. The discharge cap 100A is used by being attached to the container 150 shown in Figure 1. In this embodiment, the container 150 is a tube container and comprises a cylindrical mouth portion 151 centered on a central axis O, and a flexible body portion 152 with one end connected to the mouth portion 151 and the other end closed. A male threaded portion 153 is provided on the outer circumferential surface of the mouth portion 151. The space partitioned inside the container 150 (storage space S) contains liquid contents such as cosmetics or food seasonings.

[0011] Furthermore, as shown in Figure 1, the discharge cap 100A of this embodiment is composed of a cap body 1, a slit valve 2A, a retaining member 3A, and a lid 4.

[0012] The cap body 1 is provided with a cylindrical inner cap wall 1a that surrounds the opening 151. The inner surface of the inner cap wall 1a is provided with a female threaded portion 1b that fits into the male threaded portion 153 provided on the outer surface of the opening 151, and the cap body 1 can be attached to the container 150 by rotating it relative to the container 150. Note that the cap body 1 is not limited to being attached to the container 150 by threads, but may also be attached by an undercut, for example.

[0013] A cap top wall 1c is integrally provided at the upper end of the inner circumferential wall 1a of the cap, covering the upper part of the mouth 151. An annular upper wall 1d extending upward is provided on the upper surface of the cap top wall 1c. A circular cap opening 1e is provided in the center of the cap top wall 1c, located radially inward from the mouth 151. An annular lower wall 1f extending downward from radially outward from the cap opening 1e is provided on the lower surface of the cap top wall 1c, an annular sealing wall 1g located radially outward from the lower annular wall 1f and in contact with the inner circumferential surface of the mouth 151 when attached to the container 150 is provided, and an outer cap wall 1h located radially outward from the inner circumferential wall 1a of the cap is provided.

[0014] The slit valve 2A is formed of a relatively soft material such as rubber, elastomer, low-density polyethylene (LDPE), or linear low-density polyethylene (LLDPE). The slit valve 2A of the present embodiment includes a base 2a having an annular plate shape. An annular slit valve recess 2b is provided on the lower surface of the base 2a and is shaped to recess the base 2a upward. An inner edge portion of the base 2a is provided with a slit valve peripheral wall 2c extending upward, and a partition wall 2d that is elastically deformable in the vertical direction is provided on the radially inner side of the upper portion of the slit valve peripheral wall 2c. The partition wall 2d of the present embodiment has a shape that curves so as to protrude upward. In the following description, the back surface of the partition wall 2d is the downstream surface (the lower surface of the partition wall 2d in the state shown in FIG. 1) when the content liquid is discharged from the accommodation space S toward the outside.

[0015] The slit valve 2A also includes a slit 2e that penetrates the partition wall 2d in the thickness direction (vertical direction). As shown in FIG. 4A, the slit 2e of the present embodiment has two slit portions 2e1 that extend linearly in a state of facing the partition wall 2d (in a plan view), and the two slit portions 2e1 intersect in a cross shape. In the present embodiment, the intersection portion 2e2 where the two slit portions 2e1 intersect is located at the center of the partition wall 2d. In the present embodiment, the lengths L of the two slit portions 2e1 are the same, but they may be different.

[0016] The partition wall 2d also includes a protrusion 2f that protrudes upward at an outer edge portion of the partition wall 2d located radially outside the slit 2e as shown in FIGS. 4A and 4B. As shown in FIG. 4B, the tip portion 2g of the protrusion 2f of the present embodiment is shaped to be arcuate in a side view. In the present embodiment, a total of four protrusions 2f are provided at equal intervals in the circumferential direction.

[0017] As shown in Fig. 1, the holding member 3A has an annular plate shape and includes a bottom portion 3a whose outer edge extends downward. On the upper surface of the bottom portion 3a, an annular holding member convex portion 3b that protrudes upward is provided. And on the inner edge portion of the bottom portion 3a, a holding member peripheral wall 3c that extends upward along the inner peripheral surface of the slit valve peripheral wall 2c is provided.

[0018] And on the radially inner side of the upper portion of the holding member peripheral wall 3c, a support wall 3d is provided that has a shape that curves along the back surface (lower surface of the partition wall 2d) of the partition wall 2d and supports the lower surface of this partition wall 2d from below. The support wall 3d is provided with a communication port 3e that penetrates it in the vertical direction (thickness direction). The communication port 3e of the present embodiment, as shown in Figs. 1 and 2A, has a circular shape in plan view and is a central side communication port 3e1 located directly below the intersection portion 2e2, and four outer peripheral side communication ports 3e2 that have a fan shape in plan view and are located radially outside the intersection portion 2e2.

[0019] The outer peripheral surface of the above-described bottom portion 3a is shaped to engage with the inner peripheral surface of the lower annular wall 1f. Thereby, the slit valve 2A is held by the holding member 3A such that the base portion 2a is sandwiched between the lower surface of the cap top wall 1c and the upper surface of the bottom portion 3a. Also, at this time, since the holding member convex portion 3b is located inside the slit valve recess 2b, the movement of the slit valve 2A in the radial inner and outer directions is also restricted. When the slit valve 2A is held, as shown in Fig. 1, the protrusion portion 2f protrudes slightly above the upper annular wall 1d, but since the tip portion 2g of the protrusion portion 2f is shaped to be arcuate as described above, it will not catch even if touched by a finger or the like, and no excessive force will act on the slit valve 2A.

[0020] In this embodiment, the lid 4 is equipped with a hinge portion 4a connected to the outer peripheral wall 1h of the cap and a biasing portion 4b, and is integrally formed with the cap body 1. In Figure 1, the dashed line shows the lid 4 in the closed position covering the top wall 1c of the cap, while the solid line shows the lid 4 in the open position. The lid 4 is equipped with a lid top wall 4c located above the top wall 1c of the cap when moved to the closed position, and a lid peripheral wall 4d located below the outer edge of the lid top wall 4c. The lid top wall 4c, the lid peripheral wall 4d, and the outer peripheral wall 1h of the cap are cut out where the biasing portion 4b is provided, and the biasing portion 4b is provided in this cutout. The biasing portion 4b is shaped to follow the outer peripheral surfaces of the lid top wall 4c, the lid peripheral wall 4d, and the outer peripheral wall 1h of the cap when the lid 4 is moved to the open position. The hinge portion 4a integrally connects the lid peripheral wall 4d and the cap peripheral wall 1h, bending when the lid 4 is moved to the closed position and extending as shown in Figure 1 when the lid 4 is moved to the open position. The biasing portion 4b is elastically deformable so that the portion connected to the lid top wall 4c and the portion connected to the cap peripheral wall 1h bend, and acts to bias the lid 4 so that it moves to the open position when the lid 4 is moved from the closed position to the open position, and acts to bias the lid 4 so that it moves to the closed position when the lid 4 is moved from the open position to the closed position.

[0021] Furthermore, the lid 4 is provided with an annular lid wall 4e on the lower surface of the lid top wall 4c when the lid 4 is moved to the closed position. The annular lid wall 4e is shaped so that its inner surface fits into the outer surface of the upper annular wall 1d when the lid 4 is moved to the closed position, thereby maintaining the lid 4 in the closed position. When the lid 4 is moved to the closed position, the tip 2g of the projection 2f mentioned above contacts the lower surface of the lid 4. A detailed explanation of the projection 2f when the lid 4 is moved to the closed position will be given later.

[0022] To discharge the contents from a container 150 fitted with a discharge cap 100A configured in this way, the lid 4 is moved to the open position, and the container 150 is further displaced to a tilted position. When the body 152 of the container 150 is pressed, the containment space S is pressurized, and the contents pass through the communication port 3e and push up the partition wall 2d. As a result, the partition wall 2d elastically deforms so that the area around the intersection 2e2 is bent upward, away from the support wall 3d, as shown in Figure 3A. This causes the slit 2e to open, and the contents are discharged to the outside. In this embodiment, the thickness of the partition wall 2d and the length of the slit 2e in the slit valve 2A are set so that the slit 2e opens without having to press the body 152 as hard as in conventional caps that have increased the self-closing force of the slit. In other words, the discharge cap 100A in this embodiment can discharge the contents with less force than conventional discharge caps that required relatively strong pressure on the container when discharging the contents.

[0023] When the required amount of contents is dispensed and the pressure on the body 152 is released, the pressure in the containment space S returns to its original state, and the partition wall 2d, which had been elastically deformed to bend upward, returns to its downward position as shown in Figure 3B. Here, since a support wall 3d is provided below the partition wall 2d, the partition wall 2d does not move excessively downward. Also, since the slit 2e is closed when the partition wall 2d is in contact with the support wall 3d, it is possible to prevent outside air from entering the containment space S.

[0024] Furthermore, as shown in Figure 3C, if a support wall is not provided and the pressure on the container 150 is released, the partition wall 2d, which was elastically deformed upward, may excessively deform downward when it returns to its original state, as illustrated. At this time, the partition wall 2d moves in a way that draws in the surrounding outside air, so there is a risk that outside air will be drawn into the containment space S. In contrast, the partition wall 2d in this embodiment does not move excessively downward by contacting the support wall 3d when it returns to its original state, thus preventing outside air from entering the containment space S.

[0025] However, even when a support wall 3d is provided, if the size of the central communication opening 3e1 located directly below the intersection 2e2 in the slit 2e becomes excessively large, when the partition wall 2d restores itself, the partition wall 2d near the intersection 2e2 is more likely to elastically deform downwards, which may cause outside air to enter the containment space S. The inventors of this application have confirmed that, as shown in Figures 4A and 4B, if the inner diameter of the central communication opening 3e1 is D and the length of the slit portion 2e1 is L, then the intrusion of outside air into the containment space S can be suitably suppressed if the following formula (1) is satisfied. In this embodiment, the lengths of the two slit portions 2e1 are the same, but if they are different, the length of the longer slit portion 2e1 should be used in the following formula (1). Also, there may be three or more slit portions 2e1 that intersect radially at the intersection 2e2. D ≤ (2 / 3) × L ···(1)

[0026] The communication port 3e is not limited to the one shown in Figure 2A, but may also be the one shown in Figure 2B, for example. The communication port 3e shown in Figure 2B omits the central communication port 3e1 located directly below the intersection 2e2 shown in Figure 2A, and is composed of four outer peripheral communication ports 3e2 located radially outside the intersection 2e2. When the communication port 3e is composed only of outer peripheral communication ports 3e2 located away from the intersection 2e2, elastic deformation of the partition wall 2d downward does not occur where the central communication port 3e1 is located, and therefore it is preferable that the relationship in equation (1) described above does not need to be considered.

[0027] After the liquid contents are dispensed, some liquid remains attached to the slit 2e. If the slit 2e remains closed for an extended period, depending on the type of liquid, it may solidify, making it difficult to open the slit 2e the next time the liquid is dispensed. In this embodiment, the lid 4 is configured to contact the tip 2g of the projection 2f when moved to the closed position, pushing the projection 2f downwards. Specifically, since the projection 2f is located on the outer edge of the partition wall 2d, the area around the intersection 2e2 located in the center of the partition wall 2d undergoes slight elastic deformation, separating from the support wall 3d. This allows the slit 2e to be opened slightly. Therefore, even if the lid 4 is moved to the closed position for an extended period, it is possible to prevent the liquid contents from solidifying while the slit 2e remains closed.

[0028] Next, a second embodiment of the discharge cap according to the present invention, discharge cap 100B, will be described with reference to Figure 5. Note that parts common to discharge cap 100A described above are denoted by the same reference numerals in the drawings, and detailed explanations are omitted.

[0029] The discharge cap 100B is used by attaching it to the container 150 described above. The discharge cap 100B comprises the cap body 1 and lid 4 described above, while replacing the slit valve 2A and retaining member 3A with a slit valve 2B and retaining member 3B.

[0030] The slit valve 2B comprises the base portion 2a, the slit valve recess 2b, and the slit valve peripheral wall 2c described above. A partition wall 2h, which is elastically deformable in the vertical direction, is provided on the radially inward side of the upper part of the slit valve peripheral wall 2c. The partition wall 2h in this embodiment has a curved shape that protrudes downward. The partition wall 2h is provided with the slit 2e described above (two slit portions 2e1 intersect in a cross shape at the intersection portion 2e2). The partition wall 2h is also provided with the projection portion 2f described above.

[0031] The retaining member 3B comprises the bottom portion 3a, the retaining member protrusion 3b, and the retaining member peripheral wall 3c described above. On the radially inward side of the upper part of the retaining member peripheral wall 3c, there is a support wall 3f that curves along the back surface of the partition wall 2h (the downstream surface when the contents are discharged from the containment space S toward the outside, which is the lower surface of the partition wall 2h in the state shown in Figure 5), and supports the back surface of the partition wall 2h from below. The support wall 3f is equipped with the communication openings 3e described above (composed of the central communication opening 3e1 shown in Figure 2A and four outer peripheral communication openings 3e2).

[0032] When discharging the contents from a container 150 fitted with a discharge cap 100B configured in this way, the lid 4 is moved to the open position, and the container 150 is further displaced to a tilted position. When the body 152 of the container 150 is pressed, the containment space S is pressurized, and the contents pass through the communication port 3e and push up the partition wall 2h. As a result, the partition wall 2h elastically deforms so that the area around the intersection 2e2 is bent upward so that it separates from the support wall 3f, and this opens the slit 2e, allowing the contents to be discharged to the outside. In this embodiment of the discharge cap 100B, the thickness of the partition wall 2h and the length of the slit 2e in the slit valve 2B are set so that the slit 2e opens without having to press the body 152 as hard as in conventional caps that have increased the self-closing force of the slit, so the contents can be discharged with little force.

[0033] Then, when the required amount of contents is dispensed and the pressure on the body 152 is released, the pressure in the containment space S returns to its original state. As a result, the partition wall 2h, which had elastically deformed to bend upward, returns to its downward position and is supported by the support wall 3f, so that the partition wall 2h does not move excessively downward. In addition, since the slit 2e is closed with the partition wall 2h in contact with the support wall 3f, it is possible to prevent outside air from entering the containment space S.

[0034] In the discharge cap 100B, it is preferable that the inner diameter D of the central communication port 3e1 and the length L of the slit portion 2e1 satisfy the above-described formula (1). Also, in the discharge cap 100B, the communication port 3e is not limited to that shown in Figure 2A, but may be, for example, that shown in Figure 2B.

[0035] Next, a pump-type dispenser 200, which is one embodiment of the pump-type dispenser according to the present invention, will be described with reference to Figures 6 to 8. The illustrated pump-type dispenser 200 is attached to a container (a pouch container 250 in this embodiment) indicated by dashed lines and is configured as a dispenser-equipped container 210.

[0036] First, let's describe the pouch container 250. The pouch container 250 of this embodiment comprises a flexible, bag-shaped pouch container body 251 and a spout 252 attached to the pouch container body 251.

[0037] The pouch container body 251 is made by, for example, layering two thin synthetic resin sheets and heating the outer edges of these sheets to weld them together, with a space provided inside the two sheets for containing the liquid contents.

[0038] The spout 252 is cylindrical in shape, with its lower part located inside the pouch container body 251 and its upper part comprising a dispensing tube 252a that discharges from the pouch container body 251. On the outer circumferential surface of the lower part of the dispensing tube 252a, there is a mounting portion 252b that is located between the two sheets that make up the pouch container body 251 and is fixed to these sheets. Above the mounting portion 252b, there is a plate-like portion 252c that extends radially outward from the outer circumferential surface of the dispensing tube 252a, and above the mounting portion 252b, there is a male threaded portion 252d that extends spirally along the outer circumferential surface of the dispensing tube 252a.

[0039] Next, the pump-type discharger 200 will be described. The pump-type discharger 200 of this embodiment consists of a lower cylinder 11, a pipe 12, a suction valve 13, a mounting cap 14, a packing 15, an upper cylinder 16, a slit valve 17, a holding member 18, a nozzle member 19, an outer head member 20, an inner head member 21, and a stopper member 22. Here, the lower cylinder 11, pipe 12, suction valve 13, mounting cap 14, packing 15, upper cylinder 16, slit valve 17, holding member 18, nozzle member 19, and stopper member 22 constitute the "base" as defined in this specification, the outer head member 20 and the inner head member 21 constitute the "head" as defined in this specification, and the nozzle member 19 and the laterally oriented peripheral wall 16j, which will be described later, constitute the "nozzle" as defined in this specification. In Figure 6, the symbol "O1" indicates the central axis of the base (the central axis of the base peripheral wall 16f, which will be described later, and will be hereinafter referred to as central axis O1), and the symbol "O2" indicates the central axis of the nozzle (the central axis of the lateral peripheral wall 16j, which will be described later, and will be hereinafter referred to as central axis O2). Of the above components, the suction valve 13 and the packing 15 are made of relatively soft materials such as rubber, elastomer, low-density polyethylene (LDPE), or linear low-density polyethylene (LLDPE).

[0040] The lower cylinder 11 comprises a cylindrical lower cylinder body 11a. A flange 11b extending radially outward is provided on the outer circumferential surface of the lower cylinder body 11a. The lower end of the lower cylinder body 11a is provided with a bottom portion 11c that has a shape resembling a combination of an annular plate-shaped portion extending radially inward and a cylindrical portion extending upward from the inner edge of the annular plate-shaped portion. Here, the upper opening of the cylindrical portion 11c1 of the bottom portion 11c is referred to as the inlet 11d. A cylindrical pipe-holding tube 11e extending downward is provided on the lower surface of the annular plate-shaped portion of the bottom portion 11c.

[0041] The pipe 12 is hollow, and its upper end is inserted into and fitted into the pipe holding cylinder 11e.

[0042] The suction valve 13 comprises a cylindrical base 13a positioned inside the lower cylinder body 11a, a suction valve body 13b located inside the base 13a, covering the inlet 11d and seated on the upper surface of the cylindrical portion 11c1 of the bottom 11c, and an elastically deformable connecting piece 13c connecting the base 13a and the suction valve body 13b.

[0043] The mounting cap 14 comprises a cap top wall 14a that extends horizontally and is an annular plate shape with a circular through hole in the center, and a cylindrical cap peripheral wall 14b that extends downward from the outer edge of the cap top wall 14a. The inner surface of the cap peripheral wall 14b is provided with a female threaded portion 14c that screws into the male threaded portion 252d. The mounting cap 14 is attached to the lower cylinder 11 by inserting the through hole in the center of the cap top wall 14a into the upper part of the lower cylinder body 11a.

[0044] The packing 15 is an annular plate shape and is inserted into the lower part of the lower cylinder body 11a and fitted and held in place therewith. When the female threaded portion 14c of the mounting cap 14 is screwed onto the male threaded portion 252d of the spout 252, the packing 15 is sandwiched between the dispensing tube 252a and the flange 11b. This prevents problems such as the contents spilling out of the dispensing tube 252a when the pouch container 250 is displaced to an inverted position.

[0045] The upper cylinder 16 is cylindrical and includes a retaining cylinder 16a that surrounds the upper part of the lower cylinder body 11a. The upper end of the retaining cylinder 16a is provided with a disc-shaped inner wall 16b that extends radially inward above the upper cylinder 16, and a circular through-hole is provided in the center of the inner wall 16b. Here, the through-hole provided in the inner wall 16b is referred to as the inlet communication port 16c. The lower surface of the inner wall 16b is provided with an insertion cylinder 16d that is cylindrical and surrounds the upper part of the lower cylinder body 11a. As shown in the figure, the upper part of the lower cylinder body 11a is inserted between the retaining cylinder 16a and the insertion cylinder 16d, thereby fitting and holding the retaining cylinder 16a in place of the lower cylinder body 11a. The insertion cylinder 16d is located above the base 13a which is positioned inside the lower cylinder body 11a, and restricts the vertical movement of the suction valve 13 between itself and the bottom 11c.

[0046] The lower end of the retaining cylinder 16a is provided with an annular plate-shaped outer wall 16e that extends radially outward. The outer edge of the outer wall 16e is provided with a cylindrical base peripheral wall 16f that extends upward. As shown in Figure 7, the outer surface of the base peripheral wall 16f is provided with a plate-shaped finger-grip flange 16g that protrudes radially outward. In this embodiment, a pair of finger-grip flanges 16g are provided, straddling the central axis O1.

[0047] At the lower part of the base peripheral wall 16f, an outlet communication opening 16h is provided, which penetrates the base peripheral wall 16f, at a location offset by 90 degrees from the pair of finger-grip flanges 16g in a plan view. The base peripheral wall 16f also has a cylindrical lateral peripheral wall 16j that extends radially outward from the outer surface of the base peripheral wall 16f, surrounding the outlet communication opening 16h, and is centered on the central axis O2.

[0048] Furthermore, as shown in Figure 6, the upper cylinder 16 is equipped with an elastic piece 16k that extends upward from the upper surface of the inner wall 16b and is elastically deformable radially inward. The elastic piece 16k shown by a dashed line to the right of the central axis O1 in Figure 6 is a diagram showing the state before bending (the state in which the elastic piece 16k and the extension portion 21b, which will be described later, are not in contact before the components are assembled as a pump-type discharger 200). In this embodiment, a total of six elastic pieces 16k are provided at equal intervals in the circumferential direction so as to surround the inlet communication port 16c with the central axis O1 as the center in a plan view. As will be described later, when the contents are discharged, the elastic piece 16k is elastically deformed toward the inlet communication port 16c by the extension portion 21b when the head outer member 20 is pressed, and when the pressing force on the head outer member 20 is released, the restoring force returns the head outer member 20 and the head inner member 21 to their original positions.

[0049] The elastic piece 16k comprises a plate-shaped elastic piece body 16m and a reinforcing rib 16n that is narrower than the elastic piece body 16m (shorter in circumferential length than the elastic piece body 16m). The reinforcing ribs 16n are provided at both ends of the elastic piece body 16m in the circumferential direction. The reinforcing rib 16n has a thicker thickness (radial length) at the base where it connects to the inner wall 16b, and its thickness gradually decreases in the middle section in the vertical direction, becoming thinner at the tip.

[0050] Incidentally, if a flexible elastic piece is constantly bent with a relatively large force, it may lose its resilience and become less resilient. To address this problem, in this embodiment, the thickness of the elastic piece 16k is increased at the base by a reinforcing rib 16n which is thicker at the base, while the thickness at the tip is thinner than at the base. Therefore, the tip of the elastic piece 16k is more flexible, and the base of the elastic piece 16k is less flexible, thus suppressing wear at the base of the elastic piece 16k. In this embodiment, the elastic force required to restore the head outer member 20 and the head inner member 21 is adjusted to be mainly exerted at the base of the elastic piece 16k, including the thickness of the reinforcing rib 16n.

[0051] The slit valve 17 includes a slit valve circumferential wall 17a that extends along the inner circumferential surface of the lateral circumferential wall 16j. A partition wall 17b that is elastically deformable in a direction along the central axis O2 is provided on the radially inward side of the longitudinal middle portion of the slit valve circumferential wall 17a. The partition wall 17b in this embodiment has a curved shape that protrudes along the central axis O2 toward the side where the discharge cylinder 19d, which will be described later, is located.

[0052] The slit valve 17 also has a slit 17c that penetrates the partition wall 17b in the thickness direction. The slit 17c in this embodiment has the same shape as the slit 2e shown in Figure 4, and has two slit portions 17c1 that extend linearly when facing the partition wall 17b (in a plan view), and the two slit portions 17c1 intersect in a cross shape. The intersection 17c2 where the two slit portions 17c1 intersect is located in the center of the partition wall 17b.

[0053] The retaining member 18 includes a retaining member circumferential wall 18a that extends along the inner circumferential surface of the lateral circumferential wall 16j, with its tip inserted into the inside of the slit valve circumferential wall 17a. The end of the retaining member circumferential wall 18a has a curved shape that follows the back surface of the partition wall 17b (the downstream surface when the contents are discharged from the containment space S toward the outside, the right surface of the partition wall 17b in the state shown in Figure 6), and a support wall 18b is provided to support this back surface of the partition wall 17b. The support wall 18b is provided with a communication port 18c that penetrates it in the thickness direction. The communication port 18c in this embodiment has the same shape as the communication port 3e shown in Figure 2A, and includes a central communication port 18c1 and an outer peripheral communication port 18c2 that are identical in shape and arrangement to the central communication port 3e1 and the outer peripheral communication port 3e2.

[0054] The nozzle member 19 is provided with a base cylinder 19a that surrounds the tip of the lateral peripheral wall 16j. The tip of the base cylinder 19a is provided with an annular plate-shaped connecting wall 19b that extends radially inward from the base cylinder 19a. On the back surface of the connecting wall 19b is an inner cylinder 19c that is cylindrical and surrounded by the tip of the lateral peripheral wall 16j. As shown in Figure 6, when the combined slit valve 17 and retaining member 18 are inserted into the lateral peripheral wall 16j, and the nozzle member 19 is then inserted into the lateral peripheral wall 16j, the tip of the lateral peripheral wall 16j fits between the base cylinder 19a and the inner cylinder 19c, and the nozzle member 19 is fitted and held in place by the lateral peripheral wall 16j. When the nozzle member 19 is held on the lateral peripheral wall 16j, the combined slit valve 17 and holding member 18 are held immovably in the direction along the central axis O2 by the outer surface of the base peripheral wall 16f and the end of the inner cylinder 19c. A discharge cylinder 19d, which is cylindrical and curves downward at its tip, is provided on the surface of the connecting wall 19b. Here, the opening at the tip of the discharge cylinder 19d is referred to as the discharge port 19e.

[0055] The head outer member 20 comprises a disc-shaped top wall 20a and a cylindrical head peripheral wall 20b extending downward from the outer edge of the top wall 20a. The outer circumferential surface of the head peripheral wall 20b is provided with a piston portion 20c that is slidable and in liquid-tight contact with the inner circumferential surface of the base peripheral wall 16f. The piston portion 20c in this embodiment consists of an annular plate-shaped base portion 20d that protrudes radially outward from the outer circumferential surface of the head peripheral wall 20b, and a sliding piece 20e that extends upward and downward from the outer edge of the base portion 20d and contacts the inner circumferential surface of the base peripheral wall 16f while elastically deforming.

[0056] The inner head member 21 is disc-shaped and has an inner top wall 21a that is inserted inside the outer head member 20 and fitted and held by the head peripheral wall 20b. An extension portion 21b extending downward is provided on the lower surface of the inner top wall 21a. The extension portion 21b in this embodiment is cylindrical with a central axis O1. The lower part of the extension portion 21b is inclined to widen radially outward as it generally extends downward, as shown in Figure 6, and the inner edge of this inclined portion contacts the outer surface of the elastic piece 16k (elastic piece body 16m). Here, the portion of the extension portion 21b that contacts the elastic piece 16k is referred to as the contact portion 21c.

[0057] The stopper member 22 comprises a stopper top wall 22a which is an annular plate shape, a stopper outer peripheral wall 22b which is cylindrical and extends downward from the outer edge of the stopper top wall 22a, and a stopper inner peripheral wall 22c which is cylindrical and extends downward from the inner edge of the stopper top wall 22a. As shown in the figure, the piston portion 20c is inserted inside the base peripheral wall 16f by combining the head outer member 20 and the head inner member 21, and the base peripheral wall 16f is inserted between the stopper outer peripheral wall 22b and the stopper inner peripheral wall 22c, thereby fitting and holding the stopper member 22 to the base peripheral wall 16f. In this state, since the stopper inner peripheral wall 22c is located above the piston portion 20c, the combined head outer member 20 and head inner member 21 will not come out of the upper cylinder 16.

[0058] As shown in Figure 6, the space located inside the head peripheral wall 20b and the base peripheral wall 16f is referred to as the internal space S1. In this embodiment, the internal space S1 is surrounded by the lower cylinder 11, the upper cylinder 16, and the head outer member 20, and is the space from the inlet 11d through the inlet communication port 16c to the outlet communication port 16h. The space located inside the lateral peripheral wall 16j and the nozzle member 19, and from the outlet communication port 16h through the communication port 18c to the discharge port 19e, is referred to as the discharge space S2. In the following description, it is assumed that the liquid contents have already been discharged from the discharge port 19e, and that the liquid contents are stored in the internal space S1 and the space from the inlet communication port 16c to the communication port 18c in the discharge space S2.

[0059] In the pump-type discharger 200, which is composed of such components, before pressing the outer head member 20 located to the right of the central axis O1 in Figure 6, the contact portion 21c of the extension portion 21b contacts the elastic piece 16k, causing the elastic piece 16k to bend slightly, and the outer head member 20 and the inner head member 21 are moved to their upper limit. In this embodiment, the elastic piece 16k is thicker at the base due to the reinforcing rib 16n, while thinner at the tip. Therefore, before pressing the outer head member 20, as shown in Figure 6, the tip of the elastic piece 16k bends, while the base of the elastic piece 16k is less likely to bend. As described above, in the elastic piece 16k of this embodiment, the elastic force for returning the outer head member 20 and the inner head member 21 is adjusted to be mainly expressed at the base of the elastic piece 16k, thus suppressing the effect of deformation while ensuring the function of returning the outer head member 20 and the inner head member 21. Furthermore, when the outer head member 20 and the inner head member 21 are moved to their upper limits, the force acting on the tip side of the elastic piece 16k is small before the outer head member 20 is pressed. Therefore, the effect of deformation at the tip side of the elastic piece 16k, which remains bent as shown in Figure 6, can be mitigated.

[0060] When the outer head member 20 is pressed from above, the contact portion 21c of the extension portion 21b that contacts the elastic piece 16k applies pressure to the elastic piece 16k, causing the elastic piece 16k to bend radially inward, as shown to the left of the central axis O1 in Figure 6. Also, when the outer head member 20 and the inner head member 21 are lowered by pressing the outer head member 20, the piston portion 20c, which is slidable and in liquid-tight contact with the inner surface of the base peripheral wall 16f, also lowers, pressurizing the internal space S1. Here, the suction valve body portion 13b of the suction valve 13 is seated on the upper surface of the cylindrical portion 11c1 at the bottom portion 11c, as shown in Figure 6. In other words, the suction valve 13 has the function of allowing the flow of liquid contents from the pouch container 250 to the internal space S1, while restricting the flow of liquid contents from the internal space S1 to the pouch container 250. Because such a suction valve 13 is provided, the liquid contents of the pressurized internal space S1 do not flow into the pouch container 250, but are introduced into the discharge space S2 where the slit valve 17 is located.

[0061] The partition wall 17b of the slit valve 17 is elastically deformable in a direction along the central axis O2. The back surface of the partition wall 17b is supported by a support wall 18b, and in this case the slit 17c is closed and the communication port 18c is closed. In other words, the slit valve 17 functions as a discharge valve that allows the flow of liquid contents from the internal space S1 to the discharge port 19e, while restricting the flow of liquid contents from the discharge port 19e to the internal space S1. The liquid contents introduced into the discharge space S2 pass through the communication port 18c and press against the partition wall 17b, causing the partition wall 17b to elastically deform so that the peripheral part of the intersection 17c2 is bent away from the support wall 18b, and the slit 17c opens. As a result, the liquid contents that have passed through the slit 17c move within the discharge space S2 and are discharged to the outside from the discharge port 19e.

[0062] Furthermore, in this embodiment, the slit valve 17 does not require as much force to open the slit 17c compared to conventional valves with increased self-closing force of the slit, so excessive force is not required when pressing the outer head member 20.

[0063] Furthermore, the pump-type dispenser 200 of this embodiment is equipped with a pair of finger-grip flanges 16g as shown in Figure 7, so that the outer head member 20 can be pressed with the thumb while either finger-grip flange 16g is held between the index and middle fingers. In other words, when dispensing the liquid contents, the pump-type dispenser 200 can be supported by the finger-grip flanges 16g, so that the liquid contents can be easily dispensed even when the pump-type dispenser 200 is attached to a flexible pouch container 250. Also, when dispensing the liquid contents, it is possible to hold the pump-type dispenser 200 by supporting the lower surface of one finger-grip flange 16g with the index finger and the lower surface of the other finger-grip flange 16g with the middle finger, so that the pump-type dispenser 200 is held between these fingers and the thumb placed on the upper surface of the outer head member 20, and in this case as well, the liquid contents can be easily dispensed.

[0064] While pump-type dispensers with a nozzle equipped with a discharge port have been known for some time, in this type of pump-type dispenser, the discharge port moves when the head is pressed. In contrast, in the pump-type dispenser 200 of this embodiment, the discharge port 19e is provided on the nozzle member 19 that constitutes the "base," and the position of the discharge port 19e does not change even when the head outer member 20 that constitutes the "head" is pressed, so that the liquid contents can be stably discharged toward the discharge destination.

[0065] Subsequently, when the pressure on the outer head member 20 is released, the elastic force of the elastic piece 16k, which had been elastically deformed, acts on the extension portion 21b, causing the outer head member 20 and the inner head member 21 to begin rising. As a result, the piston portion 20c, which is slidable and in liquid-tight contact with the inner surface of the base peripheral wall 16f, also rises, and the internal space S1 is depressurized. Furthermore, the partition wall 17b, which had been elastically deformed to bend away from the support wall 18b, returns to its original state as the pressure in the pressurized internal space S1 decreases and is supported by the support wall 18b. Therefore, it does not excessively elastically deform toward the side opposite to where the discharge port 19e is located, and the slit 17c can be stably maintained in a closed state. In this embodiment, the slit valve 17 is located relatively far from the discharge port 19e in the discharge space S2, so there is little risk of outside air being drawn into the inside of the partition wall 17b. However, even if the slit valve 17 is placed near the discharge port 19e, the restored partition wall 17b is supported by the support wall 18b, thus preventing the problem of outside air being drawn into the inside of the partition wall 17b. Here, the suction valve body 13b of the suction valve 13 is detachable from the upper surface of the cylindrical portion 11c1 at the bottom 11c, and the suction valve 13 allows the flow of liquid contents from the pouch container 250 to the internal space S1. Therefore, when the internal space S1 is depressurized, the liquid contents contained in the pouch container 250 are sucked into the internal space S1 via the pipe 12 and the inlet 11d. Subsequently, by pressing the outer head member 20 from above, the liquid contents in the internal space S1 can be discharged again from the discharge port 19e.

[0066] In the pump-type discharger 200 of this embodiment, a slit valve 17, which functions as a discharge valve, can be placed inside the "nozzle" which is composed of a horizontal peripheral wall 16j and a nozzle member 19. On the other hand, while spherical valve bodies have been used as discharge valves in the past, in this case the valve body needs to be moved up and down, which limits the location where the valve body can be placed. In contrast, the pump-type discharger 200 of this embodiment allows the slit valve 17 to be placed inside the horizontally extending "nozzle," thus increasing the degree of freedom in configuration. Furthermore, by providing the slit valve 17 inside the "nozzle," the discharge valve is placed close to the discharge port 19e, which effectively prevents the problem of liquid remaining inside the nozzle member 19 dripping out of the discharge port 19e after the liquid has been discharged.

[0067] Although one embodiment embodying the present invention has been described above with reference to the drawings, the above-described embodiment may be modified as follows. For example, the communication ports 3e provided in the discharge caps 100A and 100B and the communication port 18c provided in the pump-type discharger 200 are not limited to the arrangement and shape shown in Figures 2A and 2B, etc., and can be changed as appropriate. Also, the number of elastic pieces 16k provided in the pump-type discharger 200 and the positions where they are provided are not limited to the above-described embodiment and can be changed as appropriate.

[0068] Furthermore, although the elastic piece 16k in the above-described embodiment bends toward the central axis O1, it may also bend toward the central axis O1. In the above-described embodiment, the elastic piece 16k is provided on the upper cylinder 16 (base) and the extension portion 21b is provided on the head inner member 21 (head), but the extension portion 21b may be provided on the upper cylinder 16 and the elastic piece 16k may be provided on the head inner member 21.

[0069] Alternatively, the head circumferential wall 20b may be positioned radially outward from the base circumferential wall 16f, and a piston portion 20c that is slidable and in liquid-tight contact with the outer circumferential surface of the base circumferential wall 16f may be provided on the inner circumferential surface of the head circumferential wall 20b.

[0070] Furthermore, the discharge cap and pump-type dispenser according to the present invention can be attached to various containers. For example, in the embodiment described above, the container 150 to which the discharge caps 100A and 100B are attached is a tube container, and the container to which the pump-type dispenser 200 is attached is a pouch container 250. However, the discharge caps 100A and 100B may be attached to a pouch container, or the pump-type dispenser 200 may be attached to a tube container. These can also be used in containers whose volume is reduced by discharging the liquid contents, and can be attached to, for example, thin-walled containers that can be reduced in volume, or so-called delaminated containers (double-walled containers). The pump-type dispenser 200 is not limited to the illustrated embodiment, and may, for example, be equipped with a pump in which a piston is placed inside a cylinder, and the pump is operated by pushing down an upwardly biased nozzle head to discharge the liquid contents.

[0071] (Note) This specification discloses the following technologies in one aspect. The reference numerals listed below correspond to those used in the accompanying drawings, but are provided as examples only and are not intended to limit the inventions of this application.

[0072] (Technology 1) A cap body (1) is attached to the mouth (151) of a container (150) that holds the liquid contents, and has a cap opening (1e) located inside the mouth (151), A slit valve (2A) having a partition wall (2d, 2h) provided inside the cap opening (1e) and having a curved shape that protrudes in a direction along the central axis (O) of the mouth portion (151) and is elastically deformable, and a slit (2e) that penetrates the partition wall (2d, 2h) in the thickness direction, A discharge cap (100A) comprising: support walls (3d, 3f) that are curved along the back surface of the partition walls (2d, 2h) and support the back surface thereof; and a communication opening (3e) that penetrates the support walls (3d, 3f) in the thickness direction, and holding members (3A, 3B) that hold the slit valves (2A, 2B) between themselves and the cap body (1).

[0073] This technology allows the partition wall with the slit to be supported by a support wall, and the curvature increases the rigidity of the partition wall compared to a flat wall. In other words, the partition wall around the slit is less likely to elastically deform inward towards the container, thus preventing outside air from being drawn into the container through the slit. Furthermore, since it is no longer necessary to increase the self-closing force as much as before to prevent outside air from being drawn into the container, the force required during dispensing can be reduced, for example, by making the partition wall thinner.

[0074] (Technology 2) The slit (2e) has a plurality of slit portions (2e1), and the slit portions (2e1) intersect each other. The discharge cap (100A) described in Technical 1 is located away from the intersection (2e2) where the slit portions (2e1) intersect, with the aforementioned communication port (3e) being positioned away from the intersection (2e2).

[0075] This technology prevents the partition wall near the intersection from entering the communication opening when the partition wall is restored, thus more effectively preventing and suppressing the intrusion of outside air into the container.

[0076] (Technology 3) The slit (2e) has a plurality of slit portions (2e1), and the slit portions (2e1) intersect each other. The aforementioned communication opening (3e) is circular in shape and is located directly below the intersection (2e2) where the slit portions (2e1) intersect. When the inner diameter of the communication port (3e) is D and the length of the slit portion (2e1) is L, the discharge cap (100A) described in Technology 1 satisfies the following formula (1). D ≤ (2 / 3) × L ···(1)

[0077] This technology prevents the area near the intersection of the restored partition wall from entering the inside of the communication opening, even if the communication opening is located directly below the intersection, thus effectively suppressing the intrusion of outside air into the container.

[0078] (Technology 4) The slit valves (2A, 2B) are covered by a cover (4), The discharge cap (100A) according to Technical 1, wherein the partition wall (2d, 2h) has a projection (2f) that protrudes from the outside of the slit (2e) toward the lid (4) and whose tip (2g) contacts the back surface of the lid (4).

[0079] This technology allows the slit to remain slightly open when the lid is moved to the closed position, thus preventing the problem of the liquid contents solidifying and preventing the slit from opening.

[0080] (Technology 5) A pump-type dispenser (200) comprising a base attached to a container (250) that contains the liquid contents, and a head that moves back and forth relative to the base, wherein pressing the head causes the liquid contents to be discharged to the outside from a discharge port (19e) provided at the tip of the nozzle, A slit valve (17) having a partition wall (17b) provided inside the nozzle and having a curved shape that protrudes in a direction along the central axis (O2) of the nozzle and is elastically deformable, and a slit (17c) that penetrates the partition wall (17b) in the thickness direction, A pump-type discharger (200) comprising a support wall (18b) that is curved along the back surface of the partition wall (17b) and supports the back surface, and a holding member (18) that holds the slit valve (17) inside the nozzle and has a communication opening (18c) that penetrates the support wall (18b) in the thickness direction.

[0081] This technology prevents outside air from being drawn into the inside of the partition, and also eliminates the need for excessive force when pressing the head.

[0082] (Technology 6) The head is The head has a peripheral wall (20b) on which a piston portion (20c) is provided on the outer or inner circumferential surface, The aforementioned base is The piston portion (20c) slidably contacts the base peripheral wall (16f), An internal space (S1) is provided inside the head peripheral wall (20b) and the base peripheral wall (16f), and allows the storage space (S) of the container (250) and the inside of the nozzle to pass through. A suction valve (13) allows the flow of liquid contents from the containment space (S) to the internal space (S1), while restricting the flow of liquid contents from the internal space (S1) to the containment space (S). The system includes a slit valve (17) that functions as a discharge valve, allowing the flow of liquid contents from the internal space (S1) toward the discharge port (19e), while restricting the flow of liquid contents from the discharge port (19e) toward the internal space (S1), Either the head or the base is located in the internal space (S1) and has an extension (21b) extending toward the other of the head or the base. The pump-type discharger (200) according to Technology 5, wherein either the head or the base has an elastic piece (16k) located in the internal space (S1) that bends due to the extension (21b) when the head is pressed.

[0083] This technology allows the elastic piece to flex due to the extension when the head is pressed, and the flexed elastic piece then returns to its original position. Furthermore, since the metal coil springs that were commonly used to return the head to its original position are no longer needed, there is no need to separate metal parts when disposing of the product after use, and it can be reused as a resin product, making it highly recyclable.

[0084] Although one embodiment of the present invention has been described above, the present invention is not limited to such specific embodiments, and unless otherwise specifically limited in the above description, various modifications and changes are possible within the scope of the spirit of the present invention as described in the claims. For example, the configuration of the above-described embodiment can be added or deleted as appropriate, and the configuration of one embodiment can be provided in other embodiments. Furthermore, the effects in the above-described embodiment are merely illustrative of the effects that may result from the present invention. In other words, the effects of the present invention are not limited to the above-described effects, and additional effects may also be produced in addition to the above-described effects. [Explanation of Symbols]

[0085] 1: Cap body 1a: Inner circumferential wall of the cap 1b: Female threaded section 1c: Cap top wall 1d: Upper annular wall 1e: Cap opening 1f: Lower ring wall 1g: Seal wall 1h: Cap outer wall 2A, 2B: Slit valve 2a: base 2b: Slit valve recess 2c: Slit valve peripheral wall 2d: bulkhead 2e: Slit 2e1: Slit section 2e2: Intersection 2f:Protrusion 2g:Tip 2h: Bulkhead 3A, 3B: Holding member 3a: bottom 3b: Holding member convex part 3c: Peripheral wall of the retaining member 3d: support wall 3e: Communication port 3e1: Center side communication port 3e2: Outer communication port 3f: Support wall 4: Lid 4a: Hinge section 4b: Biasing part 4c: Lid top wall 4d: Lid body peripheral wall 4e: Lid annular wall 11: Lower cylinder 11a: Lower cylinder body 11b: Flange 11c: Bottom 11c1: Cylindrical part 11d: Inlet 11e: Pipe retaining tube 12: Pipe 13: Suction valve 13a: Base 13b: Suction valve body 13c: Connecting piece 14: Attachment cap 14a: Cap top wall 14b: Cap surrounding wall 14c: Female thread section 15: Packing 16: Upper cylinder 16a: Holding cylinder 16b:Inner wall 16c: Entrance side communication port 16d: Insertion tube 16e:Outer wall 16f: Base perimeter wall 16g: Finger-grip flange 16h: Outlet side communication port 16j: Sideways perimeter wall 16k: Elastic piece 16m: Elastic piece body 16n: Reinforcement ribs 17: Slit valve 17a: Slit valve peripheral wall 17b: Bulkhead 17c: Slit 17c1: Slit section 17c2: Intersection 18: Retaining member 18a: Peripheral wall of the retaining member 18b: Support wall 18c: Communication port 18c1: Center side communication port 18c2: Outer perimeter communication port 19: Nozzle component 19a: Base tube 19b: Connecting wall 19c: Internal cylinder 19d:Discharge tube 19e:Discharge port 20: Head outer component 20a:Top wall 20b: Head surrounding wall 20c: Piston section 20d: base 20e: Sliding piece 21: Head inner component 21a: Inner top wall 21b: Extension part 21c: Contact part 22: Stopper component 22a: Stopper top wall 22b: Stopper outer wall 22c: Inner wall of stopper 100A, 100B: Discharge cap 150: Container 151: Mouth 152: Torso 153: Male threaded section 200: Pump-type dispensing device 210: Container with dispensing device 250: Pouch container 251: Pouch container body 252: Spout 252a: Pour tube 252b: Mounting part 252c: Plate-like part 252d: Male threaded section O: Central axis of the mouth O1: Center axis of the base O2: Nozzle central axis S: Containment space S1: Internal space S2: Exhaust space

Claims

1. A cap body that is attached to the mouth of a container that holds the liquid contents and has a cap opening located inside the mouth, A slit valve having a partition wall provided inside the cap opening, which is curved to protrude along the central axis of the opening and is elastically deformable, and a slit that penetrates the partition wall in the thickness direction, A discharge cap comprising a support wall having a curved shape along the back surface of the partition wall and supporting the back surface, and a retaining member having a communication opening that penetrates the support wall in the thickness direction and holding the slit valve between itself and the cap body.

2. The slit has a plurality of slit portions, and these slit portions intersect each other. The discharge cap according to claim 1, wherein the communication port is located away from the intersection where the slit portions intersect.

3. The slit has a plurality of slit portions, and these slit portions intersect each other. The aforementioned communication opening is circular in shape and is located directly below the intersection where the slit portions intersect. The discharge cap according to claim 1, where D is the inner diameter of the communication port and L is the length of the slit portion, and satisfies the following formula (1). D ≤ (2 / 3) × L ... (1)

4. Having a cover that covers the slit valve, The discharge cap according to claim 1, wherein the partition wall has a projection that protrudes from the outside of the slit toward the lid and whose tip contacts the back surface of the lid.

5. A pump-type dispenser comprising a base attached to a container for holding liquid contents and a head that moves back and forth relative to the base, wherein pressing the head causes the liquid contents to be discharged to the outside from a discharge port provided at the tip of the nozzle, A slit valve having a partition wall provided inside the nozzle, which is curved to protrude in a direction along the central axis of the nozzle and is elastically deformable, and a slit that penetrates the partition wall in the thickness direction, A pump-type discharger comprising a support wall that has a curved shape along the back surface of the partition wall and supports the back surface, and a holding member that holds the slit valve inside the nozzle and has a communication port that penetrates the support wall in the thickness direction.

6. The head is The head has a peripheral wall on which a piston portion is provided on the outer or inner surface, The aforementioned base is The base peripheral wall with which the piston portion slidably contacts, An internal space is provided inside the head peripheral wall and the base peripheral wall, which allows the container's storage space and the inside of the nozzle to pass through. A suction valve that allows the flow of liquid contents from the containment space to the internal space, while restricting the flow of liquid contents from the internal space to the containment space, The system includes a slit valve that functions as a discharge valve, allowing the flow of liquid contents from the internal space toward the discharge port, while restricting the flow of liquid contents from the discharge port toward the internal space, Either the head or the base is located in the internal space and has an extension that extends toward the other of the head or the base. The pump-type discharger according to claim 5, wherein either the head or the base is located in the internal space and comprises an elastic piece that bends due to the extension when the head is pressed.

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