KR20250021533A - Discharge cap - Google Patents

Abstract

The present invention aims to suppress an external force applied to a container to discharge the contents (CLq) to an appropriate size, to prevent the contents (CLq) discharged from a discharge nozzle (29) from becoming too thick, and to improve the disconnection of the contents (CLq) after discharge. A valve portion (49) provided with a slit valve (7A) has a slit portion (49b) provided with a slit (55) and an outer peripheral portion (49a) connected to a thin-walled tube portion (51) (connection portion). The slit portion (49b) is more easily deformed than the outer peripheral portion (49a) due to pressure changes in the internal space of the container. When the contents (CLq) is discharged, the slit portion (49b) is deformed in the discharge direction of the contents (CLq), and after the contents (CLq) is discharged, it is deformed toward the nozzle path (29a).

Description

Discharge cap

The present invention relates to a discharge cap.

Lubricants, caulking agents, and viscous liquids such as honey are accommodated in a container having elasticity and a discharge cap mounted on the mouth. The discharge cap is provided with a nozzle for discharging the liquid (content liquid) accommodated in the internal space of the container. The nozzle is a hollow body having a flow path (nozzle flow path) formed therein for the liquid. The nozzle flow path is connected to the internal space of the container when the discharge cap is mounted on the mouth of the container.

When the contents are discharged from the nozzle, an external force is applied to the container. For example, when the nozzle path is filled with the contents and the container is compressed, the pressure in the internal space of the container increases, causing the contents to be discharged from the nozzle.

As such a discharge cap, for example, a discharge cap described in Patent Document 1 is known. In the discharge cap of Patent Document 1, a slit valve having a cross-shaped slit is provided in the nozzle.

When the discharge cap of Patent Document 1 is mounted on the mouth of the container, and the inside of the nozzle passage is filled with the contents, and then an external force is applied to the container, the contents inside the nozzle passage are pushed out toward the slit valve side as the pressure in the internal space of the container increases, and a cross-shaped slit is opened by the contents. Thereafter, the contents pass through the gap (discharge port) of the slit and are discharged to the outside.

After the contents are discharged, when the external force on the container is released, the container swells due to the elasticity of the container, and the contents and air near the slit are drawn into the nozzle path (sackback). The slit is closed when the container returns to its original shape.

In a container equipped with a discharge cap, the external force for discharging the contents is required not to be too large. For example, even if the contents are high viscosity liquids such as lubricants or honey, the contents are required to be discharged by applying an appropriate amount of external force to the container.

Here, in order to suppress the size of the external force applied to the container, it is possible to consider lengthening the slit provided in the valve. However, simply lengthening the slit may cause another problem, such as the content liquid discharged from the nozzle becoming too thick. In addition, there may also be a problem that the disconnection of the content liquid after discharge becomes worse. For example, after the external force on the container is released, the content liquid that does not return to the nozzle path may extend into a thread-like shape and adhere to the outer surface of the cap.

Patent Document 1: Japanese Patent Publication No. 6345040

In this way, conventional discharge caps have the problem that if the slit is made long to suppress external force applied to the container, the contents discharged from the nozzle become too thick.

The present invention has been made in consideration of the above problems, and its main objects are to suppress an external force applied to a container to discharge the contents to an appropriate size, to prevent the contents discharged from a nozzle from becoming too thick, and to improve the disconnection of the contents after discharge.

In order to solve the above problem, the present invention is a discharge cap which is mounted on a bend of a container having elasticity and discharges a liquid content in accordance with a pressure increase in the internal space of the container due to an external force applied to the container, the discharge cap comprises a nozzle which forms a nozzle channel having a smaller cross-sectional area than the opening area of the bend, and a valve which is provided on the nozzle and is made of an elastic material which is more flexible than the nozzle, the valve comprises a valve portion through which the liquid content in the nozzle channel is discharged, a cylindrical retaining portion which is retained by a retainer to the nozzle, and a cylindrical connecting portion which connects the valve portion and the retaining portion, the valve portion comprises a slit portion which is provided with a slit that opens and closes in accordance with a difference between atmospheric pressure and the pressure of the internal space of the container, and an outer peripheral portion which is connected to the connecting portion, the slit portion being more easily deformed by a change in the pressure of the internal space than the outer peripheral portion, and is characterized in that when the liquid content is discharged, it is deformed in the discharge direction of the liquid content, and further, after the liquid content is discharged, it is deformed toward the nozzle channel side.

According to the present invention, the external force applied to the container for discharging the contents can be suppressed to an appropriate size, the contents discharged from the nozzle cannot become too thick, and the interruption of the contents after discharging can be improved.

Figure 1 is a cross-sectional view showing a discharge cap and a part of a container according to the first embodiment, showing a closed state with a cover body.
Figure 2 is a cross-sectional view showing a discharge cap and a part of a container according to the first embodiment, showing an open state with the cover body removed.
Figure 3 is an enlarged view of part A shown in Figure 1.
Fig. 4 (a) is a plan view of the slit valve, and (b) is a cross-sectional view along the line B-B shown in Fig. 4 (a).
Figure 5 (a) is a drawing showing a state in which the contents are filled in the nozzle passage and no external force is applied to the container, (b) is a drawing showing a state in which the slit portion of the slit valve is pressed and widened by the contents in the nozzle passage, and (c) is a drawing showing a state in which the contents are discharged to the outside from the slit portion.
Figure 6 is a drawing showing (a) a state in which the contents inside the nozzle path start to return toward the container side when the external force on the container is released, (b) a drawing showing a state in which air starts to flow into the nozzle path, and (c) a drawing showing a state in which the flow of air into the nozzle path is finished and the slit valve is closed.
Fig. 7 (a) is a plan view of a slit valve according to the first modified example, and (b) is a cross-sectional view along the line C-C shown in Fig. 7 (a).
Fig. 8 is a cross-sectional view of a slit valve according to a second modified example.
Fig. 9 is a cross-sectional view of a slit valve according to a third modified example.
Fig. 10 is a cross-sectional view of a slit valve according to the fourth modified example.
Fig. 11 is a cross-sectional view of a slit valve according to the fifth modified example.
Fig. 12 is a cross-sectional view of a discharge cap according to a modified example of the first embodiment.
Fig. 13 (a) is a plan view showing an open state of a discharge cap according to a modified example of the first embodiment, and (b) is a cross-sectional view along the line D-D shown in Fig. 13 (a).
Fig. 14 is a cross-sectional view showing a closed state with a cover body placed on the discharge cap according to the second embodiment.
Figure 15 is an enlarged view of part E shown in Figure 14.
Fig. 16 is a cross-sectional view of a discharge cap according to a modified example of the second embodiment.

＜First embodiment＞

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, unless specifically stated, the components, types, combinations, shapes, relative arrangements, etc. described in each embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples.

FIG. 1 and FIG. 2 are cross-sectional views showing a discharge cap (1A) according to the first embodiment, and a part of a container (3). As shown in FIG. 1 and FIG. 2, the discharge cap (1A) according to the first embodiment has a nozzle (29) and is detachably mounted to a bend (15) of an elastic container (squeeze container) (3). A liquid (content) (CLq) is accommodated in the internal space of the container (3). The discharge cap (1A) discharges the content (CLq) from the nozzle (29) in accordance with a pressure increase in the internal space of the container (3) due to an external force applied to the container (3).

＜Courage (3)＞

The container (3) is molded from a synthetic resin such as polyethylene (PE) or polyethylene terephthalate (PET), is easily deformed, and is also elastic. When an external force is applied to the container (3) by compression (squeeze), etc., it is deformed to shrink the volume of the internal space, and when the external force is released, it returns to its original shape due to elasticity.

The container (3) has a body part (13) for accommodating the liquid content (CLq) and a mouth part (15) that is formed integrally with the body part (13) and for discharging the liquid content (CLq). A male screw (17) for mounting a discharge cap (1A) is formed on the outer periphery of the mouth part (15).

The shape of the body part (13) is not particularly limited as long as it contracts the volume of the internal space when an external force is applied, and also returns to its original shape when the external force is released. For example, the body part (13) can be formed in a cylindrical shape having a bottom.

The content liquid (CLq) contained in the internal space of the container (3) is a liquid having a viscosity such as a lubricant, a caulking agent, and honey. The viscosity of the lubricant is approximately 3100 mPa·s, and the viscosity of the honey is approximately 12000 mPa·s.

In the description below, the content liquid (CLq) is, for example, a liquid having a viscosity of 500 mPa·s to 12,000 mPa·s.

＜Discharge cap (1A) according to the first embodiment＞

The discharge cap (1A) is provided with a discharge nozzle (29), and also includes a cap body (5) that is detachably mounted to the opening (15) of the container (3), a slit valve (7A) (valve body) provided at the tip of the discharge nozzle (29), a retainer (9) (retainer), and a cover body (11) that is detachably mounted to the cap body (5) so as to cover the discharge nozzle (29).

The cap body (5) has a roughly disc-shaped ceiling wall (21), a roughly cylindrical outer wall portion (23), a cylindrical middle wall portion (25), and a cylindrical inner wall portion (27) extending from the inner surface of the ceiling wall (21) toward the container (3), and a roughly cylindrical discharge nozzle (29) extending from the center of the outer surface of the ceiling wall (21) toward the opposite side of the container (3). In the present embodiment, the cap body (5) is made of a synthetic resin having a hardness that does not deform when the contents (CLq) are discharged.

The tubular outer wall portion (23) extends from the outer edge of the ceiling wall (21) to right next to the body portion (13). On the outer wall surface of the end portion (the end portion farthest from the ceiling wall (21)) of the tubular outer wall portion (23), an annular extension portion (31) extending radially outward is formed. The extension portion (31) is provided to support the opening edge of the cover body (11) mounted on the cap body (5).

The tubular middle wall portion (25) is provided concentrically with the tubular outer wall portion (23) at an appropriate interval on the inner circumference side of the tubular outer wall portion (23). An end portion (an end on the side farther from the ceiling wall (21)) of the tubular middle wall portion (25) extends to the vicinity of the root of the opening (15). A female screw (33) is formed on the inner wall surface of the tubular middle wall portion (25) into which a male screw (17) of the opening (15) is removably fitted.

The tubular inner wall portion (27) is provided concentrically with the tubular middle wall portion (25) at a necessary interval so that the tip portion of the bend (15) can be fitted into the inner circumference of the tubular middle wall portion (25). Accordingly, a space (groove) (35) for inserting the bend (15) of the container (3) is formed between the tubular middle wall portion (25) and the tubular inner wall portion (27).

The length of the cylindrical inner wall portion (27) is shorter than that of the cylindrical middle wall portion (25). The outer surface of the cylindrical inner wall portion (27) is provided with a taper whose diameter decreases as it gets further away from the ceiling wall (21). The taper guides the bulb (15) when it is fitted onto the cap body (5). The outer surface of the cylindrical inner wall portion (27) on the ceiling wall (21) side is in close contact with the inner surface of the bulb (15) when the bulb (15) is fitted onto the cap body (5), thereby suppressing leakage of the contents (CLq).

＜Discharge nozzle (29)＞

The discharge nozzle (29) is a tubular shape that extends from the base on the ceiling wall (21) side toward the tip away from the ceiling wall (21), and a nozzle path (29a) through which the content liquid (CLq) flows is provided inside the discharge nozzle (29). In addition, an opening (43) is provided in the ceiling wall (21) that connects the nozzle path (29a) and the internal space of the container (3). Accordingly, the content liquid (CLq) can flow back and forth between the internal space of the container (3) and the nozzle path (29a).

Since the cross-sectional area (SA29a) of the nozzle euro (29a) is smaller than the opening area (OP15) of the bulb (15), the thickness of the liquid content (CLq) discharged from the tip of the discharge nozzle (29) can be made thinner than the liquid content (CLq) directly flowing out from the bulb (15). In addition, since the discharge nozzle (29) has a predetermined length, it becomes easy to discharge the liquid content (CLq) to a desired location.

In addition, in the present embodiment, the discharge nozzle (29) has a cylindrical shape that tapers from the base to the tip on the ceiling wall (21) side, but is not limited to this shape. For example, the cross-sectional shape of the nozzle path (29a) may be constant from the base to the tip of the discharge nozzle (29).

Fig. 3 is an enlarged view of part A shown in Fig. 1. As shown in Figs. 2 and 3, a ring-shaped protrusion (39) protruding radially inward is formed on the inner circumference of the tip of the discharge nozzle (29).

The inner surface of the protrusion (39) is a discharge opening (37) in which a valve portion (49) provided by the slit valve (7A) and a thin-walled tube portion (51) are arranged. In addition, the inner surface of the protrusion (39) (an annular surface protruding radially inwardly within the nozzle path (29a)) is a contact surface (38) that comes into contact with the valve-side wall portion (47) of the slit valve (7A) to prevent the slit valve (7A) from falling off.

On the outer surface of the tip of the discharge nozzle (29), an expanding portion (45) is formed that expands radially outward. The expanding portion (45) is provided to detachably fix the cover body (11).

As shown in Fig. 3, a ring-shaped concave portion (41) is formed on the inner surface of the discharge nozzle (29) at a position closer to the tip than the middle of the length direction of the discharge nozzle (29). The concave portion (41) is provided to prevent the retainer (9) from falling off from the discharge nozzle (29).

＜Slit valve (7A)＞

Fig. 4 (a) is a plan view of the slit valve (7A), and Fig. 4 (b) is a cross-sectional view taken along the line B-B shown in Fig. 4 (a). As shown in Figs. 3, 4 (a), and 4 (b), the slit valve (7A) has a cylindrical valve-side wall portion (47) (retaining portion), a valve portion (49) having a substantially disc shape through which the contents (CLq) in the nozzle passage (29a) are discharged, and a thin-walled tube portion (51) (connecting portion) connecting the valve-side wall portion (47) and the valve portion (49).

The slit valve (7A) is made of an elastic material that is more flexible than the discharge nozzle (29) (cap body (5)). In the present embodiment, the slit valve (7A) is integrally molded using a synthetic resin such as silicone having a hardness (hardness measured by a durometer type A) of about A20° to about A50°. Since the slit valve (7A) of the present embodiment is manufactured by integral molding, it is easy to produce.

The valve-side wall portion (47) is held to the discharge nozzle (29) by the retainer (9). The end face (47a) (more specifically, the surface protruding radially outward from the thin-walled portion (51)) of the valve-side wall portion (47) abuts against the abutment surface (38) of the protrusion (39), thereby preventing the slit valve (7A) from falling off from the discharge nozzle (29). For this reason, the thickness (TH47) of the valve-side wall portion (47) is set to a thickness necessary to prevent falling off from the discharge nozzle (29). In the present embodiment, the thickness (TH47) of the valve-side wall portion (47) is about 0.3 mm to about 1.0 mm.

The thin wall portion (51) connects the inner circumference of the front end surface (47a) of the valve-side wall portion (47) and the outer circumference of the inner surface (54) of the valve portion (49). In addition, the outer diameter of the thin wall portion (51) is approximately the same as the opening diameter of the discharge opening (37). Therefore, the outer circumference of the thin wall portion (51) is in contact with the discharge opening (37) while the slit valve (7A) is held at the front end of the discharge nozzle (29). In other words, the thin wall portion (51) is arranged to fit into the discharge opening (37) of the discharge nozzle (29).

The thickness (TH51) of the thin wall portion (51) is sufficiently thin compared to the thickness (TH47) of the valve-side wall portion (47). For example, the thickness (TH51) of the thin wall portion (51) is less than half (approximately 1/4 to approximately 1/3) of the thickness (TH47) of the valve-side wall portion (47). In addition, the length (L51) of the thin wall portion (51) is approximately 0.3 mm to approximately 0.7 mm.

For this reason, the area of the front end surface (47a) of the valve-side wall portion (47) (in other words, the area of the portion that comes into contact with the contact surface (38) provided by the discharge nozzle (29)) can be sufficiently secured, so that the slit valve (7A) can be effectively prevented from falling off from the discharge nozzle (29).

In addition, the thin wall portion (51) is easily deformed compared to the valve side wall portion (47). Since the thin wall portion (51) is easily deformed, even if the valve side wall portion (47) is deformed due to the installation of the slit valve (7A), the deformation of the valve side wall portion (47) is absorbed.

Specifically, the valve-side wall portion (47) is fitted between the discharge nozzle (29) and the retainer (9) from the outer and inner sides, as shown in Fig. 3. The mounting of the slit valve (7A) to the discharge nozzle (29) is performed, for example, by relatively moving the retainer (9) with the slit valve (7A) covered at the tip portion toward the tip of the discharge nozzle (29) through the inner space of the discharge nozzle (29) (i.e., the nozzle path (29a)). Therefore, when the slit valve (7A) is mounted, the valve-side wall portion (47) may be deformed due to friction between the inner surface of the discharge nozzle (29) and the outer surface of the retainer (9). The thin-walled tube portion (51) is configured so that even if the valve-side wall portion (47) is deformed, the valve portion (49) is not affected by being deformed itself.

In addition, the thin-walled tube (51) may be deformed when discharging the liquid content (CLq). For example, when discharging a liquid content (CLq) having a relatively high viscosity, such as a lubricant (viscosity: approximately 3100 mPa·s) or honey (viscosity: approximately 12000 mPa·s), the thin-walled tube (51) expands when an external force in the discharge direction is applied to the valve portion (49), and contracts after discharging the liquid content (CLq). As described later, when the thin-walled tube (51) contracts, it pulls the outer peripheral portion (49a) toward the nozzle channel (29a), thereby assisting the deformation of the slit portion (49b) toward the nozzle channel (29a). As a result, the disconnection of the liquid content (CLq) after discharging is improved.

＜Valve section (49)＞

The outer diameter of the valve portion (49) is approximately the same as the opening diameter of the discharge opening (37). Therefore, the outer surface of the valve portion (49) contacts the discharge opening (37) while the slit valve (7A) is held at the tip end of the discharge nozzle (29). In other words, the valve portion (49) is arranged so as to fit into the discharge opening (37) of the discharge nozzle (29). In the present embodiment, the outer diameter (Φ49) of the valve portion (49) is approximately 4 mm to approximately 7 mm.

The outer surface (53) of the valve portion (49) is a concave surface that is sunken into a spherical shape toward the nozzle path (29a) side (the side opposite to the discharge direction of the contents (CLq)). On the other hand, the inner surface (54) of the valve portion (49) is a flat surface that is perpendicular to the central axis (L) of the cylinder of the valve-side wall portion (47).

In the valve portion (49), a slit (55) is formed that extends radially outward from the center point (O). In the slit valve (7A), the slit (55) has a +-shaped shape. The slit (55) is configured to be opened and closed by the difference between the pressure of the internal space of the container (3) and the atmospheric pressure. In the present embodiment, the length L55 of the slit (55) is about 2 mm to about 5 mm.

In addition, with respect to the slit (55), the angle of intersection between the slit on one side and the slit on the other side is not limited to 90 degrees. For example, the angle of intersection between the slit on one side and the slit on the other side may be changed within a range of 60 degrees to 90 degrees. In addition, the length of the slit on one side and the length of the slit on the other side may be different.

The valve part (49) has an outer portion (49a) coupled to a thin wall portion (51), a slit portion (49b) provided with a slit (55), and an intermediate portion (49c) provided between the slit portion (49b) and the outer portion (49a).

As described above, since the outer surface (53) of the valve portion (49) is a spherical concave surface and the inner surface (54) is a flat surface, the outer peripheral portion (49a), the middle portion (49c), and the slit portion (49b) are formed to be gradually thinner from the outer peripheral portion of the valve portion (49) toward the center point (O). Accordingly, the middle portion (49c) is formed to be gradually thinner from the outer peripheral portion (49a) toward the slit portion (49b).

In this embodiment, the thickness of the slit portion (49b) is less than half the thickness of the outer peripheral portion (49a), and the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49) in the thickness direction of the outer peripheral portion (49a).

For example, the maximum thickness (TH49a) of the outer portion (49a) is about 0.6 mm to about 0.7 mm, and the maximum thickness (TH49b) of the slit portion (49b) is about 0.3 mm to about 0.35 mm. In addition, the minimum thickness at the center point (O) of the slit portion (49b) is about 0.15 mm to about 0.25 mm.

By the above configuration, when discharging the contents (CLq), the slit portion (49b) is more easily deformed than the outer peripheral portion (49a) due to the pressure change of the contents (CLq) (inner space of the container (3)), and contributes to reducing the diameter of the tip side (downstream side) of the discharge nozzle (29).

In addition, the outer portion (49a) is thicker than the middle portion (49c) and the slit portion (49b), and the middle portion (49c) is thicker than the slit portion (49b). Therefore, after the content liquid (CLq) is discharged, the outer portion (49a) has a greater force (restoring force) to deform in the return direction than the middle portion (49c), and the middle portion (49c) has a greater restoring force than the slit portion (49b). As a result, the slit portion (49b) receives restoring force from the outer portion (49a) and the middle portion (49c) in addition to its own restoring force, and is quickly deformed toward the nozzle path (29a), thereby improving the disconnection of the content liquid (CLq).

In addition, since the outer portion (49a) or the middle portion (49c) is thicker than the slit portion (49b), it is possible to make it difficult for the two ends of the slit (55) to split.

In addition, since the slit valve (7A) is integrally molded using synthetic resin such as silicone, the smoothness of each part (49a, 49b, 51) can be easily determined by determining the thickness (TH49a, TH49b, TH51) of each part (49a, 49b, 51).

＜Maintenance (9)＞

As shown in Fig. 3, the retainer (9) is a hollow body fitted to the inner circumference of the tip side of the discharge nozzle (29), and in this embodiment, is a substantially cylindrical member. The retainer (9) retains the valve-side wall portion (47) together with the discharge nozzle (29), and prevents the slit valve (7A) from falling off from the discharge nozzle (29).

The retainer (9) has a small-diameter barrel (57) located at the front end of the discharge nozzle (29) and a large-diameter barrel (59) located at the base end of the discharge nozzle (29) relative to the small-diameter barrel (57). The base end of the small-diameter barrel (57) and the front end of the large-diameter barrel (59) are integrally connected. In addition, the internal space (9a) of the retainer (9) constitutes a part of the nozzle path (29a).

The outer diameter of the small-diameter tube (57) is approximately the same as the inner diameter of the valve-side wall (47). The outer diameter of the large-diameter tube (59) is approximately the same as the inner diameter of the discharge nozzle (29).

On the outer surface of the base portion of the large diameter tube (59), a flange portion (61) is provided that protrudes radially outward. The flange portion (61) is fitted into a ring-shaped concave portion (41) of the discharge nozzle (29).

The retainer (9) is positioned by fitting the flange portion (61) into the concave portion (41) and is also fixed to the discharge nozzle (29).

When the retainer (9) is fixed to the discharge nozzle (29), the valve side wall portion (47) of the slit valve (7A) is placed between the discharge nozzle (29) and the small diameter tube portion (57).

The front end surface (47a) of the valve-side wall portion (47) abuts against the contact surface (38) of the protrusion (37), and the base end surface (47b) of the valve-side wall portion (47) abuts against the front end surface (60) of the large-diameter barrel portion (59) (a surface that is radially expanded more than the small-diameter barrel portion (57).

In this way, the valve side wall portion (47) is maintained in the space formed by the discharge nozzle (29) and the retainer (9). As a result, the slit valve (7A) is prevented from falling off from the discharge nozzle (29). In addition, the thin-walled tube portion (51) extends from the gap between the small-diameter tube portion (57) and the protrusion portion (37) to the tip side of the discharge nozzle (29).

＜Cover (11)＞

As shown in FIG. 1 and FIG. 3, the cover body (11) is a cylindrical member having a bottom with a cylindrical wall portion (65) in the shape of a cylinder and a plate-shaped top portion (67). A cylindrical catch portion (69) is provided protruding at the center of the inner surface (67a) of the top portion (67).

The tip portion of the discharge nozzle (29) is inserted into the internal space of the catch (69). On the inner surface of the open end of the catch (69), a taper is formed that expands toward the open end. This taper is provided to guide the tip portion of the discharge nozzle (29).

In the inner portion of the top plate (67) rather than the engaging portion (69), a contact portion (71) is provided that is spherically raised toward the open end of the engaging portion (69). The surface of the contact portion (71) comes into contact with the outer surface (53) of the valve portion (49) when the cover body (11) is mounted on the cap body (5), thereby enhancing the sealing properties of the valve portion (49).

＜Operation when discharging the contents (CLq)＞

Next, the operation when discharging the contents (CLq) is explained.

Fig. 5 (a) is a drawing showing a state in which the contents (CLq) are filled in the nozzle passage (29a) and no external force is applied to the container (3), Fig. 5 (b) is a drawing showing a state in which the slit portion (49b) of the slit valve (7A) is pressed and widened by the contents (CLq) in the nozzle passage (29a), and Fig. 5 (c) is a drawing showing a state in which the contents (CLq) is discharged to the outside from the slit portion (49b).

In addition, Figs. 5 (a) to 5 (c) show the tip of the discharge nozzle (29). In these drawings, the tip of the discharge nozzle (29) is facing downward.

First, the operation when an external force is applied to the container (3) will be described. As shown in (a) of Fig. 5, when the contents (CLq) are filled in the nozzle path (29a) and no external force is applied to the container (3), the slit portion (49b) of the slit valve (7A) is closed.

Accordingly, the liquid content (CLq) within the nozzle path (29a) remains within the nozzle path (29a) by the closed slit valve (7A) (valve part (49)).

As shown in (b) of Fig. 5, when an external force is applied to the container (3) by means of compression or the like, the pressure of the internal space increases, and a force (PR+) in the discharge direction is applied to the contents (CLq) in the nozzle path (29a). The force (PR+) in the discharge direction is proportional to the difference between the pressure of the internal space of the container (3) and the atmospheric pressure. The force (PR+) in the discharge direction is transmitted through the contents (CLq) and acts on the inner surface (54) of the valve portion (49).

The slit portion (49b) is deformed toward the discharge direction by the contents (CLq). A gap (discharge port) is formed between the slits (55) by the deformation of the slit portion (49b).

Here, since the slit portion (49b) has a smaller thickness than the outer portion (49a) and the middle portion (49c), it deforms more significantly than the outer portion (49a) and the middle portion (49c). In addition, since the middle portion (49c) has a smaller thickness than the outer portion (49a), it deforms more significantly than the outer portion (49a). For this reason, the inner surface (54) of the valve portion (49) forms a slope facing the discharge port, thereby smoothly guiding the contents (CLq).

Thereafter, as shown in (c) of Fig. 5, the contents (CLq) are continuously discharged from the gap (discharge port) between the slits (55). In this discharge cap (1A), the thickness of the slit portion (49b) is thinner than the thicknesses of the outer peripheral portion (49a) and the middle portion (49c). Therefore, the slit portion (49b) is greatly deformed with respect to the pressure change of the contents (CLq) (the pressure change in the internal space of the container (3)) compared to the outer peripheral portion (49a) and the middle portion (49c).

As a result, the contents (CLq) can be discharged from the discharge nozzle (29) without excessively increasing the external force applied to the container (3). In addition, since the thickness of the contents (CLq) discharged from the discharge nozzle (29) can be limited according to the size of the slit portion (49b) (slit (55)), the problem of the contents (CLq) becoming too thick is suppressed.

Next, the operation when the content liquid (CLq) is introduced into the discharge nozzle (29) will be described.

Fig. 6 (a) is a drawing showing a state in which the liquid content (CLq) in the nozzle path (29a) starts to return toward the container (3) when the external force to the container (3) is released, Fig. 6 (b) is a drawing showing a state in which air (AR) starts to flow into the nozzle path (29a), and Fig. 6 (c) is a drawing showing a state in which the flow of air (AR) into the nozzle path (29a) is finished and the slit valve (7A) is closed.

Also, in (a) to (c) of Fig. 6, as in (a) to (c) of Fig. 5, the tip of the discharge nozzle (29) faces downward.

As shown in (a) of Fig. 6, when the external force on the container (3) is released after the discharge of the contents (CLq), a force (PR-) (hereinafter referred to as return direction force (PR-)) is applied to the contents (CLq) in the nozzle path (29a) to return toward the container (3). The return direction force (PR-) is generated because the container (3) in a contracted state tries to swell back to its original shape by its own elasticity.

And, the outer portion (49a), the middle portion (49c), and the slit portion (49b) also try to return to their original shapes by their own elasticity. Here, since the outer portion (49a) is thicker than the middle portion (49c) and the slit portion (49b), the restoring force is stronger than the middle portion (49c) and the slit portion (49b). Similarly, the middle portion (49c) has a stronger restoring force than the slit portion (49b).

As a result, after the discharge of the contents (CLq), the slit portion (49b) receives, in addition to its own restoring force, the restoring force of the outer portion (49a) and the middle portion (49c), and is quickly deformed toward the nozzle path (29a).

As shown in (b) of Fig. 6, after the liquid content (CLq) passes through the valve portion (49), air (AR) in an amount that replenishes the discharged liquid content (CLq) flows into the nozzle passage (29a). When the air (AR) flows in, the slit portion (49b) is deformed toward the nozzle passage (29a), thereby forming a gap between the slits (55).

Here, the thickness of the slit portion (49b) is smaller than the thickness of the outer peripheral portion (49a) and the middle portion (49c). Therefore, the slit portion (49b) is greatly deformed compared to the outer peripheral portion (49a) and the middle portion (49c). By deforming the slit portion (49b), the gap between the slits (55) can be made sufficiently large, so that air (AR) can be efficiently introduced into the nozzle path (29a).

In addition, the thin-walled tube (51) formed with a thin thickness may be inclined in the inner circumferential direction of the thin-walled tube (51). For example, the thin-walled tube (51) may be inclined in the inner circumferential direction when the amount of air (AR) flowing into the nozzle passage (29a) is sufficiently large, the flow rate of the air (AR) is sufficiently high, or the viscosity of the content liquid (CLq) is high. When the thin-walled tube (51) is inclined, the slit portion (49b) is greatly inclined toward the nozzle passage (29a) by the amount that the thin-walled tube (51) is inclined. For this reason, the gap between the slits (55) becomes larger compared to the case where they are not inclined. As a result, air (AR) can be efficiently introduced into the nozzle passage (29a) even by the inclination of the thin-walled tube (51).

Thereafter, as shown in (c) of Fig. 6, the force (PR-) in the return direction for the contents (CLq) is eliminated as the container (3) returns to its original shape. As the force (PR-) in the return direction is eliminated, the slit portion (49b) of the slit valve (7A) is closed.

Accordingly, the liquid content (CLq) within the nozzle path (29a) remains within the nozzle path (29a) by the closed slit valve (7A) (valve part (49)).

As is clear from the above explanation, the slit portion (49b) is deformed according to the pressure change of the contents (CLq) (the pressure change of the internal space of the container (3)). Therefore, the gap between the slits (55) can be made sufficiently large by the force (PR-) in the return direction. As a result, the size required to efficiently introduce the contents (CLq) and air (AR) into the nozzle path (29a) can be made, thereby improving the disconnection of the contents (CLq).

In addition, in the slit valve (7A), since the outer peripheral portion (49a) can be made sufficiently thick, the restoring force of the outer peripheral portion (49a) after the discharge of the contents (CLq) can be increased. Similarly, the restoring force of the middle portion (49c) can be increased compared to the slit portion (49b).

In addition, when discharging the contents (CLq), the force (PR+) in the discharge direction received by the valve portion (49) (particularly, the inner surface (54) of the valve portion (49)) increases as the viscosity of the contents (CLq) increases. Since the thin-walled tube portion (51) is easily deformed to be thinner than the outer peripheral portion (49a) of the valve portion (49), there are cases where the outer peripheral portion (49a) is elongated in the discharge direction by the force (PR+) in the discharge direction received, as indicated by the arrow in Fig. 5 (b).

When the external force on the container (3) is released while the thin wall portion (51) is extended, the thin wall portion (51) begins to contract in the return direction by its own elasticity, as indicated by the arrow in Fig. 6 (a). The outer peripheral portion (49a) is pulled toward the container (3) by the contraction of the thin wall portion (51). The contraction force of the thin wall portion (51) assists in the deformation of the slit portion (49b) toward the nozzle path (29a) after the discharge of the contents (CLq).

In this way, there are cases where the breakage of the contents (CLq) can be further improved by stretching the thin wall (51).

In addition, since the discharge nozzle (29) of the discharge cap (1A) is a cylindrical shape with the end tapered from the base (upstream side) to the tip (downstream side), it is easy to discharge the contents into a concave portion. As a result, the contents (CLq) can be easily discharged to various locations.

＜Variations of slit valves＞

Below, a modified example of the slit valve is described.

Fig. 7 (a) is a plan view of a slit valve (7B) according to a first modified example, Fig. 7 (b) is a cross-sectional view along the line C-C shown in Fig. 7 (a), Fig. 8 is a cross-sectional view of a slit valve (7C) according to a second modified example, Fig. 9 is a cross-sectional view of a slit valve (7D) according to a third modified example, Fig. 10 is a cross-sectional view of a slit valve (7E) according to a fourth modified example, and Fig. 11 is a cross-sectional view of a slit valve (7F) according to a fifth modified example.

＜Slit valve (7B) according to the first modified example＞

The slit valve (7B) according to the first modified example shown in Fig. 7 (a) and Fig. 7 (b) is characterized by having a slit (55B) in the shape of a - letter, or in other words, the slit (55B) is formed by a single straight slit.

The slit valve (7B) is superior to the above-described slit valve (7A) in that the slit (55B) is formed by a single straight slit, but the other configurations are identical to the slit valve (7A).

Accordingly, even if a slit valve (7B) is used in the discharge cap (1A), the slit portion (49b) is deformed according to the pressure change of the contents (CLq), so that the external force applied to the container (3) to discharge the contents (CLq) can be suppressed to an appropriate size, and also, the contents (CLq) discharged from the discharge nozzle (29) does not become too thick.

In addition, in the slit valve (7B), the thickness of the slit portion (49b) is less than half the thickness of the outer peripheral portion (49a), and the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49) in the thickness direction of the outer peripheral portion (49a).

Accordingly, even if a slit valve (7B) is used in the discharge cap (1A), the restoring force of the outer peripheral portion (49a) after discharge of the contents (CLq) can be increased.

By the above configuration, after the content liquid (CLq) is discharged, the slit portion (49b) is quickly deformed toward the nozzle path (29a). As a result, the disconnection of the content liquid (CLq) can be improved. And, in the slit valve (7B), when the viscosity of the content liquid (CLq) is sufficiently high, the outer peripheral portion (49a) is pulled toward the container (3) by the shrinkage of the thin-walled tube portion (51), so that the disconnection of the content liquid (CLq) can be improved.

＜Slit valve (7C) according to the second modified example＞

The slit valve (7C) according to the second modified example shown in Fig. 8 is characterized in that the outer surface (53C) of the valve portion (49) is a flat surface and the inner surface (54C) is a concave surface that is sunken into a spherical shape toward the discharge direction of the contents (CLq).

Even if a slit valve (7C) is used in the discharge cap (1A), since the slit portion (49b) is deformed according to the pressure change of the contents (CLq), the external force applied to the container (3) to discharge the contents (CLq) can be suppressed to an appropriate size, and also the contents (CLq) discharged from the discharge nozzle (29) does not become too thick.

In addition, the outer portion (49a) or the middle portion (49c) quickly deforms the slit portion (49b) toward the nozzle path (29a) after the content liquid (CLq) is discharged. As a result, the disconnection of the content liquid (CLq) can be improved. In addition, when the viscosity of the content liquid (CLq) is sufficiently high, the disconnection of the content liquid (CLq) can be improved by the expansion and contraction of the thin-walled tube portion (51).

＜Slit valve (7D) according to the third modified example＞

The slit valve (7D) according to the third modified example shown in Fig. 9 is characterized in that each of the outer surface (53D) and the inner surface (54D) of the valve portion (49) is a concave surface sunken into a spherical shape.

Even if a slit valve (7D) is used in the discharge cap (1A), since the slit portion (49b) is deformed according to the pressure change of the contents (CLq), the external force applied to the container (3) to discharge the contents (CLq) can be suppressed to an appropriate size, and also the contents (CLq) discharged from the discharge nozzle (29) does not become too thick.

In addition, the outer portion (49a) or the middle portion (49c) quickly deforms the slit portion (49b) toward the nozzle path (29a) after the content liquid (CLq) is discharged. As a result, the disconnection of the content liquid (CLq) can be improved. In addition, when the viscosity of the content liquid (CLq) is sufficiently high, the disconnection of the content liquid (CLq) can be improved by the expansion and contraction of the thin-walled tube portion (51).

＜Slit valve (7E) according to the fourth modified example＞

The slit valve (7E) according to the fourth modified example shown in Fig. 10 is characterized in that the thickness of the middle portion (49c) of the valve portion (49) gradually becomes thinner toward the center of the valve portion (49), and further, the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49) in the thickness direction of the outer peripheral portion (49a).

Even if a slit valve (7E) is used in the discharge cap (1A), since the slit portion (49b) is deformed according to the pressure change of the contents (CLq), the external force applied to the container (3) to discharge the contents (CLq) can be suppressed to an appropriate size, and also the contents (CLq) discharged from the discharge nozzle (29) does not become too thick.

In addition, the thickness of the slit portion (49b) is less than half the thickness of the outer peripheral portion (49a), and furthermore, the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49). Therefore, after the content liquid (CLq) is discharged, the slit portion (49b) is quickly deformed toward the nozzle path (29a). As a result, after the content liquid (CLq) is discharged, the disconnection of the content liquid (CLq) can be improved.

＜Slit valve (7F) according to the fifth modified example＞

The slit valve (7F) according to the fifth modified example shown in Fig. 11 is characterized in that a portion corresponding to the middle portion (49c) on the outer surface (53F) of the valve portion (49) and a portion corresponding to the middle portion (49c) on the inner surface (54F) are tapered surfaces that are inclined toward the slit portion (49b), and further, the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49) in the thickness direction of the outer peripheral portion (49a).

Even if a slit valve (7F) is used in the discharge cap (1A), since the slit portion (49b) is deformed according to the pressure change of the contents (CLq), the external force applied to the container (3) to discharge the contents (CLq) can be suppressed to an appropriate size, and also the contents (CLq) discharged from the discharge nozzle (29) does not become too thick.

In addition, the thickness of the slit portion (49b) is less than half the thickness of the outer peripheral portion (49a), and furthermore, the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49). Therefore, after the content liquid (CLq) is discharged, the slit portion (49b) is quickly deformed toward the nozzle path (29a). As a result, after the content liquid (CLq) is discharged, the disconnection of the content liquid (CLq) can be improved.

＜Discharge cap (1B) according to a modified example of the first embodiment＞

Fig. 12 is a cross-sectional view of a discharge cap (1B) according to a modified example of the first embodiment, Fig. 13 (a) is a plan view showing an open state of a discharge cap (1B) according to a modified example of the first embodiment, and Fig. 13 (b) is a cross-sectional view along the line D-D shown in Fig. 13 (a).

As shown in Fig. 12, Fig. 13 (a), and Fig. 13 (b), a discharge cap (1B) according to a modified example of the first embodiment is characterized in that the discharge nozzle (29) is short, compared to the discharge cap (1A) of the first embodiment. In addition, the same reference numerals are given to the same configuration as the discharge cap (1A) of the first embodiment, and a description thereof is omitted.

The cap body (5) of the discharge cap (1B) is equipped with a cover body (11) via a hinge (75). A projection (79) is provided on the opposite side of the hinge (75) in the cover body (11). In addition, a recessed portion (77) is provided on the opposite side of the hinge (75) in the cap body (5). The projection (79) is provided to catch a user's finger or claw when the cover body (11) is in a closed state (see Fig. 12) in which the cap body (5) is covered. The recessed portion (77) is provided to make it easy for a user's finger, etc., to be caught on the projection (79).

Likewise, in the modified discharge cap (1B) having a single discharge nozzle (29), the contents (CLq) can be discharged from the discharge nozzle (29) without excessively increasing the external force applied to the container (3). In addition, in the discharge cap (1B), the tip of the discharge nozzle (29) can be made smaller, so that a small amount of the contents (CLq) can be discharged.

＜Discharge cap (1C) according to the second embodiment＞

Fig. 14 is a cross-sectional view showing a closed state in which a cover body (11) is placed on a discharge cap (1C) according to the second embodiment, and Fig. 15 is an enlarged view of part E shown in Fig. 14.

As shown in FIG. 14 and FIG. 15, the discharge cap (1C) according to the second embodiment is characterized in that, compared to the discharge cap (1A) of the first embodiment, a retainer (9C) is mounted on the outer peripheral surface of the tip portion of the discharge nozzle (29C). In addition, the same reference numerals are given to the same configuration as the discharge cap (1A) of the first embodiment, and explanation is omitted.

The discharge nozzle (29C) is provided with, in order from the ceiling wall (21) side toward the tip side, a large-diameter cylindrical wall (81) having the largest diameter, a medium-diameter cylindrical wall (83) having a smaller diameter than the large-diameter cylindrical wall (81), and a small-diameter cylindrical wall (85) having a smaller diameter than the medium-diameter cylindrical wall (83). In the present embodiment, the large-diameter cylindrical wall (81) is the longest and occupies approximately 4/3 of the length of the discharge nozzle (29C). Furthermore, the medium-diameter cylindrical wall (83) is the second longest, and the small-diameter cylindrical wall (85) is the shortest. Therefore, it can be said that the outer diameter of the discharge nozzle (29C) is gradually reduced in the portion on the tip side.

The outer diameter of the small diameter cylindrical wall (85) is approximately the same as the inner diameter of the valve-side wall (47) of the slit valve (7A). A ring-shaped protrusion (87) is formed on the outer surface of the medium diameter cylindrical wall (83). The protrusion (87) is provided to prevent the retainer (9C) from falling off.

The retainer (9C) is a substantially cylindrical member, and the inner diameter of the retainer (9C) is substantially the same as the outer diameter of the medium-diameter cylindrical wall (83) except for the tip portion. Furthermore, in the present embodiment, the outer diameter of the medium-diameter cylindrical wall (83) is substantially the same as the outer diameter of the cylindrical valve-side wall portion (47) of the slit valve (7). The retainer (9C) is fitted to the medium-diameter cylindrical wall (83) of the discharge nozzle (29C). When the retainer (9C) is fitted, the small-diameter cylindrical wall (85) is arranged in the inner space of the retainer (9C).

On the inner circumference of the tip of the retainer (9C), a ring-shaped protrusion (89) is formed that protrudes radially inward. The protrusion (89) is provided for the same purpose as the protrusion (39) provided in the discharge cap (1A) of the first embodiment. On the outer circumference of the tip of the retainer (9C), an expanded portion (93) is provided that engages with the engaging portion (69) of the cover body (11).

A ring-shaped concave portion (91) is formed at a position toward the base on the inner surface of the retainer (9C). The concave portion (91) engages with a protrusion (87) provided on the outer surface of the middle diameter cylindrical wall (83), thereby preventing the retainer (9C) from falling off from the discharge nozzle (29C).

By the above configuration, in the discharge cap (1C), the retainer (9C) is mounted on the discharge nozzle (29C), so that the cylindrical valve-side wall portion (47) of the slit valve (7A) is maintained between the inner surface of the retainer (9C) and the outer surface of the small-diameter cylindrical wall (85) of the discharge nozzle (29C), and further, the valve portion (49) is maintained on the inner surface of the ring-shaped protrusion (89).

In the discharge cap (1C) according to the second embodiment, the same operational effect as that of the discharge cap (1A) according to the first embodiment is achieved.

＜Discharge cap (1D) according to a modified example of the second embodiment＞

Fig. 16 is a cross-sectional view of a discharge cap (1D) according to a modified example of the second embodiment. As shown in Fig. 16, a discharge cap (1D) according to a modified example of the second embodiment applies the configuration of the discharge nozzle (29C) and the retainer (9C) of the second embodiment to the discharge cap (1B) according to the modified example of the first embodiment (see Fig. 12, etc.). In addition, the same reference numerals are given to the same configurations as those of the discharge cap (1B) according to the modified example of the first embodiment and the discharge cap (1C) according to the second embodiment, and a description thereof is omitted.

In the discharge cap (1D) according to the modified example of the second embodiment, the same operational effect as that of the discharge cap (1A) according to the first embodiment is achieved.

＜Other variations＞

The discharge cap (1A, 1C) described above has adopted a configuration in which the cover body (11) is fitted to the cap body (5), but is not limited to this configuration. For example, a male screw may be formed on the outer surface of the cylindrical outer wall portion (23) of the cap body (5), and a female screw may be formed on the inner surface of the cylindrical wall portion (65) of the cover body (11).

In addition, although the discharge cap (1B, 1D) described above adopts a configuration in which the cover body (11) and the cap body (5) are connected by a hinge (75), it is not limited to this configuration. For example, a configuration in which the cover body (11) is fitted to the cap body (5) without connecting the cover body (11) and the cap body (5) may be adopted.

In the discharge caps (1A, 1B, 1C, 1D) described above, the length of the discharge nozzle (29, 29A) can be appropriately determined.

[Summary of embodiments, functions, and effects of the present invention]

＜First embodiment＞

This embodiment is a discharge cap (1A, 1B, 1C, 1D) mounted on a ball (15) of a container (3) having elasticity and discharging a content liquid (CLq) in accordance with an increase in pressure in the internal space of the container (3) due to an external force applied to the container (3), comprising: a discharge nozzle (29, 29C) forming a nozzle passage (29a) having a smaller cross-sectional area (SA29a) than the opening area (OP15) of the ball (15); and a slit valve (7A, 7B, 7C, 7D, 7E, 7F) provided on the discharge nozzle (29, 29C) and manufactured using an elastic material that is more flexible than the discharge nozzle (29, 29C); and the slit valve (7A, 7B, 7C, 7D, 7E, 7F) discharges the content liquid (CLq) in the nozzle passage (29a). It is provided with a valve portion (49), a cylindrical valve-side wall portion (47) (retaining portion) maintained by a discharge nozzle (29, 29C) through a retainer (9, 9C), and a cylindrical thin-walled tube portion (51) (connecting portion) connecting the valve portion (49) and the valve-side wall portion (47), and the valve portion (49) is provided with a slit portion (49b) provided with a slit (55, 55B) that opens and closes depending on the difference between atmospheric pressure and the pressure of the internal space of the container (3), and an outer portion (49a) coupled to the thin-walled tube portion (51), and the slit portion (49b) is characterized in that it is more easily deformed by a change in the pressure of the internal space than the outer portion (49a), and when the contents (CLq) is discharged, it is deformed in the discharge direction of the contents (CLq), and further, after the contents (CLq) is discharged, it is deformed toward the nozzle path (29a).

According to the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the slit portion (49b) is deformed by the pressure change in the internal space, and the slit (55, 55B) is opened to form a discharge port for the contents (CLq). Since the slit portion (49b) is deformed more easily than the outer peripheral portion (49a), the external force applied to the container (3) to discharge the contents (CLq) can be suppressed to an appropriate size, and also the problem of the contents (CLq) discharged from the discharge nozzle (29, 29C) becoming too thick is suppressed.

In addition, since the outer peripheral portion (49a) is less likely to be deformed than the slit portion (49b), the restoring force after deformation becomes higher than that of the slit portion (49b). Therefore, the restoring force of the outer peripheral portion (49a) can be increased after the discharge of the contents (CLq). The restoring force of the outer peripheral portion (49a) assists the restoring force of the slit portion (49b) to return to the closed state. As a result, the disconnection of the contents (CLq) after the discharge can be improved.

＜Second embodiment＞

In the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the slit portion (49b) of the slit valve (7A, 7B, 7C, 7D, 7E, 7F) is integrally formed with the same elastic material as the outer portion (49a), and further, the thickness (TH49b) of the slit portion (49b) and the thickness (TH51) of the thin-walled tube portion (51) are thinner than the thickness (TH49a) of the outer portion (49a).

According to the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the production of the slit valve (7A, 7B, 7C, 7D, 7E, 7F) is easy, and flexibility can be managed by the thickness (TH49a, TH49b) of each part (49a, 49b).

＜Third embodiment＞

In the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the valve portion (49) of the slit valve (7A, 7B, 7C, 7D, 7E, 7F) has an intermediate portion (49c) between the slit portion (49b) and the outer peripheral portion (49a), and the intermediate portion (49c) is characterized in that it gradually becomes thinner from the outer peripheral portion (49a) toward the slit portion (49b).

According to the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, after the content liquid (CLq) is discharged, the outer peripheral portion (49a) has a greater restoring force than the middle portion (49c), and the middle portion (49c) has a greater restoring force than the slit portion (49b). As a result, the slit portion (49b) receives restoring forces from the outer peripheral portion (49a) and the middle portion (49c) in addition to its own restoring force, and is quickly deformed toward the nozzle path (29a) to improve the disconnection of the content liquid (CLq).

＜Fourth embodiment＞

In the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the valve part (49) of the slit valve (7A, 7B) is characterized by having an outer surface (53) as a spherical concave surface sunken toward the nozzle path (29a), and an inner surface (54) as a flat surface.

According to the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the deformation amount of the outer peripheral portion (49a) due to the pressure from the content liquid (CLq) received on the inner surface (54) of the outer peripheral portion (49a) can be increased. As a result, after the content liquid (CLq) is discharged, the force with which the outer peripheral portion (49a) tends to deform in the return direction can be increased, so that the slit portion (49b) can be quickly deformed toward the nozzle path (29a). As a result, the disconnection of the content liquid (CLq) can be improved.

＜Fifth embodiment＞

In the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the valve portion (49) of the slit valve (7A, 7B, 7E, 7F) is characterized in that the thickness of the slit portion (49b) is less than half the thickness of the outer peripheral portion (49a), and the slit portion (49b) is provided closer to the nozzle path (29a) than the middle position (TC49) in the thickness direction of the outer peripheral portion (49a).

According to the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, since the slit portion (49b) is provided to be offset from the middle position (TC49) toward the nozzle passage (29a), the amount of deformation when discharging the contents (CLq) can be increased compared to a configuration in which the slit portion (49b) is provided to be offset from the middle position (TC49) toward the discharge side. Accordingly, the restoring force of the slit portion (49b) after discharging the contents (CLq) is increased. As a result, the slit portion (49b) can be quickly deformed toward the nozzle passage (29a), thereby improving the disconnection of the contents (CLq).

＜Embodiment 6＞

In the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the thin-walled portion (51) (connection portion) of the slit valve (7A, 7B, 7C, 7D, 7E, 7F) is more easily deformed by pressure changes in the internal space of the container (3) than the outer peripheral portion (49a), and is characterized in that it expands in the discharge direction when the contents (CLq) are discharged, and further contracts in the return direction after the contents (CLq) are discharged.

According to the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, after the contents (CLq) is discharged, the outer peripheral portion (49a) can be pulled toward the nozzle passage (29a) by the contractile force of the thin-walled tube portion (51), so that the slit portion (49b) can be quickly deformed toward the nozzle passage (29a). As a result, the disconnection of the contents (CLq) can be improved.

＜Seventh embodiment＞

In the discharge cap (1A, 1B, 1C, 1D) according to the present embodiment, the thin-walled portion (51) (connection portion) of the slit valve (7A, 7B, 7C, 7D, 7E, 7F) is more easily deformed by a change in pressure in the internal space of the container (3) than the outer peripheral portion (49a), and is characterized in that it tilts in the inner peripheral direction of the thin-walled portion (51) after the contents (CLq) are discharged.

According to the discharge cap (1A, 1B, 1C, 1D) according to this aspect, after the content liquid (CLq) is discharged, the gap between the slits (55) can be made large, so that air (AR) can be efficiently introduced into the nozzle path (29a).

1A… Discharge cap according to the first embodiment
1B… Discharge cap according to a modified example of the first embodiment
1C… Discharge cap according to the second embodiment
1D… Discharge cap according to a modified example of the second embodiment
3… container 5… cap body
7A… Slit valve 7B… Slit valve according to the first modified example
7C… Slit valve according to the second modified example 7D… Slit valve according to the third modified example
7E… Slit valve according to the fourth modified example 7F… Slit valve according to the fifth modified example
9… Maintenance 9C… Maintenance
9a… Internal space of the retainer 11… Cover
13… body 15… bend
17… Screw 21… Ceiling wall
23… Tubular outer wall 25… Tubular middle wall
27… Tubular inner wall 29… Discharge nozzle
29C… Discharge nozzle 29a… Nozzle Euro
31… Extension 33… Female screw
35… Space (home) 37… Discharge opening
38… Contact surface 39… Protrusion
41… concave part 43… opening part
45… Expanded section 47… Valve side wall section
47a… Cross-section of the valve side wall 49… Valve part
49a… Outer circumference of valve part 49b… Slit part of valve part
49c… Middle part of valve section 51… Thin section
53… Outer surface of valve part 53C… Outer surface of valve part
53D… Outer surface of valve part 54… Inner surface of valve part
54C… Inner surface of valve part 54D… Inner surface of valve part
55…＋Letter-shaped slit 55B…－Letter-shaped slit
57… Small diameter of the retainer 59… Large diameter of the retainer
60… Section of the large diameter tube 61… Flange of the retainer
65… Cylindrical wall portion of the cover body 67… Top plate portion of the cover body
67a… Inner surface of the top plate 69… The catch of the cover body
71… Contact portion of cover body 75… Hinge
77… Concave part of cap body 79… Protrusion of cover body
81… Large diameter cylindrical wall of discharge nozzle 83… Medium diameter cylindrical wall of discharge nozzle
85… Small diameter cylindrical wall of the discharge nozzle 87… Protrusion of the medium diameter cylindrical wall
89… Protrusion of the retainer 91… Recess of the retainer
CLq… Content OP15… Opening area of the ball
SA29a… Cross-sectional area of nozzle euro TH47… Thickness of valve side wall
Φ49…Outer diameter of valve part
TC49… The middle position in the thickness direction of the outer circumference
TH49a… Maximum thickness of outer circumference TH49b… Maximum thickness of slit portion
TH51… Thickness of the thin wall L51… Length of the thin wall
L55… Slit length O… Center point of valve part
L… Central axis of valve side wall PR＋… Force in discharge direction
PR－… Force in the return direction AR… Air

Claims (7)

A discharge cap mounted on the bend of a container having elasticity and discharging the contents in accordance with an increase in pressure in the internal space of the container due to an external force applied to the container,
A nozzle forming a nozzle path having a cross-sectional area smaller than the opening area of the above-mentioned portion,
A valve is provided on the above nozzle and is also made of an elastic material that is more flexible than the above nozzle.
The above valve has a valve part through which the contents in the nozzle path are discharged, a cylindrical retention part maintained in the nozzle by a retention body, and a cylindrical connecting part connecting the valve part and the retention part.
The above valve part has a slit part having a slit that opens and closes according to the difference between atmospheric pressure and the pressure of the internal space of the container, and an outer peripheral part connected to the connecting part.
A discharge cap characterized in that the slit portion is more easily deformed by changes in pressure in the internal space than the outer peripheral portion, deforms in the discharge direction of the contents when the contents are discharged, and further deforms toward the nozzle path after the contents are discharged. In claim 1,
A discharge cap characterized in that the slit portion is integrally formed with the same elastic material as the outer peripheral portion and is thinner than the outer peripheral portion. In claim 2,
The above valve part has a middle part between the slit part and the outer peripheral part.
A discharge cap characterized in that the middle portion gradually becomes thinner from the outer portion toward the slit portion. In claim 3,
The above valve part is a discharge cap characterized in that the outer surface is a spherical concave surface sunken toward the nozzle path, and the inner surface is a flat surface. In claim 1,
The thickness of the above slit portion is less than half the thickness of the outer peripheral portion,
A discharge cap characterized in that the slit portion is provided further from the nozzle path side than the middle position in the thickness direction of the outer peripheral portion. In claim 1,
A discharge cap characterized in that the above-mentioned connecting portion is more easily deformed by a change in pressure of the internal space than the above-mentioned outer portion, and expands in the discharge direction when the contents are discharged, and further contracts in the return direction after the contents are discharged. In claim 1,
A discharge cap characterized in that the above-mentioned connecting portion is more likely to be deformed by a change in pressure in the internal space than the above-mentioned outer portion, and is tilted in the inner direction of the connecting portion after the contents are discharged.

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