CN110914170B

CN110914170B - Member for liquid injection and container

Info

Publication number: CN110914170B
Application number: CN201880050818.0A
Authority: CN
Inventors: 野尻大和; 池田和敏; 真壁隆; 藤村优介; 文野修至; 多田香织
Original assignee: Kuraray Noritake Dental Inc
Current assignee: Kuraray Noritake Dental Inc
Priority date: 2017-08-04
Filing date: 2018-08-03
Publication date: 2021-09-07
Anticipated expiration: 2038-08-03
Also published as: EP3663223B1; JP2019031331A; AU2018312303A1; AU2018312303B2; JP7066134B2; EP3663223A4; EP3663223A1; CN110914170A; CA3071620A1

Abstract

Provided is a member for liquid injection, which can more effectively prevent liquid from being discharged when opening. The inner plug (1) has a nozzle section (2), a base section (3) that engages with the mouth of the container, and a hollow cylindrical skirt section (4). The nozzle section (2) has a nozzle upper section (5) extending from the upper surface (16) of the base section (3), and a nozzle lower section (6) extending from the lower surface (17) of the base section (3). The nozzle upper part (5) is provided with an injection port (7), the nozzle lower part (6) is provided with an inflow port (8), and an internal passage (9) which penetrates from the inflow port (8) to the injection port (7) is formed. The nozzle lower portion (6) has a tip end portion (11) provided radially inside the skirt portion (4) and having a slope (12), and an inflow port (8) is formed in the slope (12). The nozzle lower part (6) has a columnar part (10) extending perpendicularly from the lower surface (17) of the base part (3), the columnar part (10) has a side surface (24) and a bottom surface (25), and an edge portion between the side surface (24) and the bottom surface (25) forms a corner part (13) at an angle of 90 degrees. The distal end portion (11) protrudes from the skirt portion (4), and a narrow portion (20) having a smaller passage cross-sectional area than other portions is formed in the internal passage (9).

Description

Member for liquid injection and container

Technical Field

The present invention relates to a member and a container for liquid injection.

Background

Conventionally, in order to inject a liquid such as a medicine contained in a container to an affected part, a device having a nozzle on an inner plug fitted to a mouth of the container has been used. Such a nozzle is capped after use, but when the cap is removed at the time of next use, the liquid remaining on the inner wall surface of the nozzle is pushed out by the internal pressure higher than the external pressure, and unintended discharge may be caused.

In order to solve the above problem, a technique described in patent document 1 below is considered. As shown in fig. 1 of patent document 1, the inner plug fitted to the squeeze container according to this technique includes a fitting cylinder 3 for mounting fitted into a mouth-and-neck portion 2 of a container body 1, a straight cylindrical nozzle 5 projecting upward from the fitting cylinder 3 substantially perpendicularly, and an injection hole 4 penetrating the nozzle 5, and a lower end of the nozzle 5 is formed in a slope "イ".

According to the inner plug described in patent document 1, the nozzle 5 and the injection hole 4 are vertically elongated, and therefore, even if the liquid adheres to the inner wall surface of the injection hole 4 in the form of bubbles at the time of injection of the liquid, the bubbles are pushed down to the lower end of the nozzle 5 by the outside air flowing into the container body 1 through the injection hole 4 after the injection. At this time, since the lower end of the nozzle 5 is formed as the inclined surface "イ", the foam dropped to the lower end of the nozzle 5 is easily dropped into the container body 1 and does not adhere to and remain on the inner wall surfaces of the injection hole 4 and the nozzle 5, and therefore, even if the cap 8 is opened at the time of the next injection, it is considered that the foam-like residual liquid is not pushed out from the injection hole 4.

However, even if the technique described in patent document 1 is adopted, if liquid remains in the inner wall surface of the fitting cylinder 3 (skirt) for mounting and in the gap formed between the inner wall of the skirt 3 and the lower end of the nozzle 5, the remaining liquid may enter the injection hole 4 due to capillary phenomenon, and the entered liquid may be ejected due to internal pressure when the cap 8 is removed.

Documents of the prior art

Patent document 1: japanese Kokai Utility model No. Hei 2-48561.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a member for liquid injection and a container which can more effectively prevent liquid from being ejected when the member is opened.

Means for solving the problems

In order to solve the above problem, a member for liquid injection according to the present invention includes a nozzle portion, a base portion engaged with a mouth portion of a container, and a hollow cylindrical skirt portion extending from the base portion so as to be fitted into the mouth portion of the container, the nozzle portion including: a nozzle upper part extending from an upper surface of the base part on the opposite side of the skirt part and having an injection port for injecting the content liquid from the container; a nozzle lower portion extending from a lower surface of the base portion, the nozzle lower portion being provided radially inward of the skirt portion and having an inlet port through which the content liquid from the container flows; and an internal passage formed to pass through the nozzle lower portion and the nozzle upper portion from the inflow port to the injection port, wherein the nozzle lower portion has a tip end portion having a slope on which the inflow port is formed, at least a portion of the tip end portion protrudes from the skirt, the internal passage of the nozzle lower portion has a narrowed portion, the nozzle lower portion and the skirt are formed to have a portion with a relatively wide radial interval and a portion with a narrow radial interval, and the radial interval is an interval between the nozzle lower portion and an inner wall of the skirt adjacent to the nozzle lower portion.

Preferably, the nozzle lower portion has a columnar portion extending perpendicularly from a lower surface of the base portion, the columnar portion having a side surface and a bottom surface from which the distal end portion extends. In this case, more preferably, the bottom surface and the end edge of the skirt portion have the same height.

The narrow portion is more preferably formed from a position having the same height as the bottom surface to the inside of the columnar portion.

More preferably, the edge portion where the side surface and the bottom surface meet forms a corner portion at an angle of 90 degrees.

The distal end portion may have a projection extending in the axial direction for guiding the drop on the side surface of the portion having the narrow radial interval. The convex portion preferably protrudes in the radial direction within a range not exceeding the diameter of the columnar portion.

In another preferred embodiment, the lower portion of the nozzle extends to the tip portion without a step.

In the present invention, the following means (1) to (3) are used as a structure for forming the wide portion and the narrow portion in the radial direction.

(1) The nozzle lower portion extends from a position of the base lower surface offset from the center of the skirt portion, thereby forming the wide portion and the narrow portion at the radial interval. In this case, the nozzle upper portion may extend from a position offset from the upper surface of the base portion so as to be aligned with the nozzle lower portion. Alternatively, only the nozzle lower portion may be offset from the center of the skirt portion, and the nozzle upper portion may extend concentrically with the skirt portion.

(2) The skirt portion further includes a partial inner circumferential wall partially surrounding the nozzle lower portion on a radially inner side of the outer circumferential wall of the skirt portion, the radial gap is formed between the nozzle lower portion and the partial inner circumferential wall adjacent to the nozzle lower portion, and the radial gap is formed between the nozzle lower portion and an inner wall of the skirt portion adjacent to the nozzle lower portion in a region where the partial inner circumferential wall is not formed.

(3) The nozzle lower portion has a portion with a relatively large wall thickness and a portion with a small wall thickness in the outer peripheral portion of the internal passage, and the portion with a narrow radial gap is formed between the portion with a large wall thickness and the inner wall of the skirt portion, and the portion with a wide radial gap is formed between the portion with a small wall thickness and the inner wall of the skirt portion.

Preferably, the length of the internal passage from the constriction portion to the injection port is 5mm or more.

In the structure for fitting the member of the present invention into the container, the base portion may include: and a side surface portion suspended from the top portion, wherein a thread to be screwed with a thread formed over an outer periphery of a side surface of the mouth portion of the container is formed on an inner wall of the side surface portion. In this aspect, a cap may be provided for closing the injection port by covering at least the upper part of the nozzle. In this case, a screw thread is formed on the inner wall of the cap, and a screw thread for screwing with the screw thread of the cap is formed over the outer periphery of the side surface of the upper portion of the nozzle.

In another configuration of fitting the member of the present invention to the container, the base may be a plate-like member having the upper surface and the lower surface, and in this case, the inner plug may be further locked to the inside of the container by engaging the plate-like member with a distal end of the mouth of the container. In this aspect, a cap may be provided for closing the injection port by covering at least an upper portion of the nozzle. In this case, a screw thread to be screwed with a screw thread formed over the outer periphery of the side surface of the mouth portion of the container is formed on the inner wall of the cap.

In a preferred embodiment of the present invention, the member having a lid includes an upper lid for closing the injection port by covering at least an upper portion of the nozzle, the base is a lower lid fitted to the mouth of the container, and the upper lid and the lower lid are pivotally openably and closably coupled. Preferably, the upper lid is configured to be engaged with the lower lid in a snap-fit manner when closed.

The cap or the upper cap of each of the above embodiments more preferably has a protrusion portion that is inserted into the injection port when closed.

In the member according to each of the above aspects, it is preferable that the nozzle upper portion and the tip end portion have a liquid removing portion on the outer periphery thereof.

The inclined surface of the tip end portion of the nozzle lower portion may be directed toward the wide portion or may be directed toward the narrow portion.

Drawings

Fig. 1 is a view of an inside plug according to a first embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a cross-sectional view taken along line a-a' of fig. 1(a), and (d) is a bottom view.

Fig. 2 is a view of a cap for covering the inside plug of fig. 1, (a) is a plan view, (B) is a front view, (c) is a sectional view taken along line B-B' of fig. 2(a), and (d) is a bottom view.

Fig. 3 is an assembly view of the inside plug of fig. 1 fitted to a container and the inside plug is further closed with the lid of fig. 2, wherein (a) is a plan view, (b) is a front view, and (C) is a sectional view taken along line C-C' of fig. 3 (a).

Fig. 4 is a diagram for explaining an operation of the inside plug of fig. 1 when used, (1) is a diagram of a state in which a container is filled with a liquid, the inside plug of fig. 1 is fitted into the container as shown in fig. 3(c), and the container is covered with a cap, and (2) is a diagram of a state in which the container is returned from the state (1) to an upright state, (3) is a diagram of an initial state when the cap is removed in the state (2), and (4) is a diagram of a state in which a short time has elapsed from the state (3).

Fig. 5 is a view taken along the line D-D' of the state (2) of fig. 4.

Fig. 6 is a view of an inside plug according to a second embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a cross-sectional view taken along line E-E' of fig. 6(a), and (d) is a bottom view.

Fig. 7 is a view of an inside plug according to a third embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a cross-sectional view taken along line F-F' of fig. 7(a), and (d) is a bottom view.

Fig. 8 is a view of an inside plug according to a fourth embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a cross-sectional view taken along line G-G' of fig. 8(a), and (d) is a bottom view.

Fig. 9 is a diagram of an inside plug according to a fifth embodiment of the present invention, in which (a) is a plan view, (b) is a front view, (c) is a cross-sectional view taken along line H-H' of fig. 9(a), (d) is a cross-sectional view when the inside plug of fig. 9(c) is fitted to a container and a cap is closed, and (e) is a bottom view.

Fig. 10 is a view showing an opened state of a lid with a hinge according to a sixth embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a right side view, (d) is a rear view, (e) is a bottom view, and (f) is a sectional view taken along the line I-I' of fig. 10 (b).

Fig. 11 is a view showing a closed state of a lid with a hinge according to a sixth embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a right side view, (d) is a rear view, (e) is a bottom view, and (f) is a sectional view taken along line J-J' of fig. 11 (b).

Fig. 12 is a view showing an opened state of a hinged lid according to a seventh embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a right side view, (d) is a rear view, (e) is a bottom view, and (f) is a sectional view taken along a line K-K' in fig. 12 (b).

Description of the reference numerals

1. 1b, 1c, 1d, 1e inner plug

1f, 1g hinge cover

2. 2b, 2e nozzle parts

3. 3b, 3d, 3e base

3f, 3g lower cover

4. 4b, 4d, 4e, 4f, 4g skirt

5. 5b, 5d, 5e, 5f, 5g nozzle top

6. 6b, 6d, 6e, 6f, 6g nozzle lower part

7. 7e, 7f, 7g injection port

8 flow inlet

9. 9e, 9d internal passages

10. 10c, 10e, 10f columnar parts

11. 11c, 11d, 11e, 11f, 11g

12. 12f, 12g inclined plane

13 corner

14 top of the container

14e plate-like member

15 side part

16. 16e upper surface

17. 17e lower surface

18 screw thread (inner plug)

19 screw thread (nozzle upper)

20. 20c narrow part

21. 21f, 21g liquid removing part

22. 22b, 22c, 22d, 22e, 22f, 22g wide portions

23. 23b, 23c, 23d, 23e, 23f, 23g narrow

24 side surface

25 bottom surface

30. 30e cover

31 screw thread (lid)

32 Top plate

33. 33e protrusion part

40 container

41 mouth (Container)

42 screw thread (Container)

43 liquid content (in container)

44 content liquid (narrow part)

45 content liquid (narrow part)

46 content liquid (internal passage)

47 cracked content liquid

50 part inner peripheral wall

51 convex part

52 relatively large wall thickness

53 relatively small wall thickness

54 screw thread (cover inner wall)

60 upper cover

61f, 61g hinge part

62 rod

63 hook part

64 hinge support

65 locking part

66 protruding part

67 protective part

68 fulcrum

69 spring part

70f, 70g, 71g concave wall parts.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

(first embodiment)

Fig. 1(a) to (d) show an inner plug 1 as a member for liquid injection according to a first embodiment of the present invention. The inside plug 1 is a member that is fitted into a container containing a content liquid such as a drug solution so that the content liquid can be injected, as will be described later. The inside plug 1 can be manufactured as an integral part by injection molding, but is not limited thereto.

As shown in fig. 1(c), the inside plug 1 includes: the nozzle unit 2 includes a base 3 that engages with a mouth of a container (not shown), and a hollow cylindrical skirt 4 that extends from the base 3 to fit into the mouth of the container. The nozzle section 2 includes: a nozzle upper part 5 (fig. 1(b)) extending from an upper surface 16 of the base part 3 on the opposite side of the skirt part 4, and a nozzle lower part 6 extending from a lower surface 17 of the base part 3. The nozzle upper part 5 has an injection port 7 for injecting the content liquid from the container, and the nozzle lower part 6 has an inflow port 8 into which the content liquid from the container flows, and forms an internal passage 9 passing through the inflow port 8 to the injection port 7 and penetrating the nozzle lower part 6 and the nozzle upper part 5.

Referring to fig. 1(c), the nozzle lower portion 6 has a distal end portion 11 provided radially inward of the skirt portion 4 and having a slope 12, and the inlet 8 is formed in the slope 12. The nozzle lower portion 6 has a columnar portion 10 extending perpendicularly from the lower surface 17 of the base portion 3, the columnar portion 10 having a side surface 24 and a bottom surface 25, an edge portion between the side surface 24 and the bottom surface 25 forming a corner portion 13 at an angle of 90 degrees. Preferably, the bottom surface 25 is at the same height as the end edge of the skirt portion 4, and the distal end portion 11 extends from the bottom surface 25. In this case, the tip end portion 11 protrudes from the skirt 4. The internal passage 9 is formed with a narrowed portion 20 having a smaller passage cross-sectional area than other portions. The narrow portion 20 is preferably formed at a position further downward near the tip end portion 11. More preferably, the narrow portion 20 is formed in the columnar portion 10 from the same height as the bottom surface 25. The length of the internal passage 9 between the narrow portion 20 and the injection port 7 is preferably as long as possible, and is preferably 5mm or more, more preferably 10mm or more.

Referring to fig. 1(d), in the present embodiment, the nozzle lower portion 6 extends downward from a position offset from the lower surface 17 at the center of the skirt portion 4, thereby forming a wide portion 22 and a narrow portion 23 spaced apart in the radial direction. In the present embodiment, as shown in fig. 1(a), the nozzle upper portion 5 also extends from a position offset from the upper surface 16 of the base portion 3 so as to be aligned with the nozzle lower portion 6. In the drawings, the inclined surface 12 of the distal end portion 11 of the nozzle lower portion 6 is shown as being directed toward the wide portion 22, but the present invention is not limited to this example, and the inclined surface 12 may be formed so as to be directed in any direction, including the narrow portion 23 (the same applies to other embodiments).

As shown in fig. 1(c), the base 3 includes: a top part 14 having an upper surface 16 and a lower surface 17, and a side part 15 hanging down from the top part 14, wherein a thread 18 is formed on the inner wall of the side part 15, and is screwed with a thread formed on the outer periphery of the side surface of the mouth of the container. Further, as shown in fig. 1(b), a thread 19 is formed on the outer periphery of the side surface of the nozzle upper portion 5. Further, a liquid removing portion 21 is provided over the outer periphery of the distal end portion of the nozzle upper portion 5.

In fig. 2, a cap 30 is shown covering the spout upper part 5 of the inside plug 1 of fig. 1. In particular, if referring to fig. 2(c), a thread 31 is formed on the inner wall of the cap 30. Further, a protrusion 33 is formed on the back surface of the top plate 32 of the lid 30.

Fig. 3 shows a state where the inside plug 1 of fig. 1 is fitted into the container 40 and the cap 30 of fig. 2 is further fitted over the inside plug 1. In particular, referring to fig. 3(c), the screw thread 42 is formed on the outer periphery of the side surface of the mouth portion 41 of the container 40, and the skirt portion 4 of the inside plug 1 is fitted into the opening portion of the mouth portion 41 of the container 40 by screwing the screw thread 18 of the inside plug 1 into the screw thread 42 of the container, whereby the inside plug 1 can be fitted into the container 40.

The cap 30 can be attached to the inside plug 1 by screwing the screw 19 of the nozzle upper portion 5 to the screw 31 of the cap 30. At this time, the protrusion 33 of the cap 30 is inserted into the injection port 7 of the nozzle portion 2. Thereby, during the period of mounting the cap 30 on the inside plug 1, the risk of leakage of the content liquid in the container 40 to the outside is eliminated, and the airtightness in the container is maintained.

Next, the operation of the inside plug 1 according to the first embodiment will be described with reference to fig. 4 and 5.

Referring to fig. 4, first, the container 40 of fig. 3 containing a content liquid 43 such as a drug solution is fitted with the inner plug 1, and the lid 30 is closed to be placed in a horizontal state (1). In this horizontal state (1), the content liquid 43 flows into the inflow port 8 and passes through the constriction 20 by capillary action. However, since the injection port 7 is closed by the protrusion 33 of the cap 30, air remains in the internal passage 9, and the content liquid 44 that has entered the narrow portion 20 is accumulated in the internal passage near the narrow portion 20 and the inflow port 8 by the air pressure.

Next, when the container is set from the horizontal state (1) to the upright state (2), the content liquid accumulated in the vicinity of the inside plug 1 in the horizontal state (1) drops by its own weight, but a certain amount of the content liquid adheres to the inner wall of the inside plug 1 by surface tension. At this time, referring to fig. 5, of the content liquid accumulated between the nozzle lower portion 6 and the inner wall of the skirt portion 4, the content liquid accumulated in the portion 22 having a wide radial interval moves to the narrow portion 23 by capillary force (see an arrow in fig. 5). Referring again to fig. 4, it can be understood that the content liquid 45 that has moved to the narrow portion 23 and accumulated falls due to the inability to withstand its own weight. Here, the distal end portion 11 where the inflow port 8 is formed protrudes downward from the end edge of the skirt portion 4, and the corner portion 13 is formed at an angle of 90 degrees, so that the content liquid collected in the vicinity of the inflow port 8 by capillary force can be reduced as much as possible.

With continued reference to fig. 4, when the cap 30 is removed from the container in the state (2) (3), the injection port 7 is released. Therefore, the vent port that generates the expansion force of the air inside the container acts so that the internal pressure of the container becomes equal to the external air pressure, and the content liquid accumulated in the narrowed portion 20 is pushed out and moves upward through the internal passage 9 as shown by 46 in state (3).

In the state (4) in which a short time has elapsed from the state (3), the content liquid to be extruded is cracked before reaching the injection port 7 in the process of passing through the long internal passage 9 as shown in 47, and the air in the container communicates with the outside air to return to the normal pressure. Here, even if the content liquid accumulated in the portion 23 with a narrow radial interval falls by its own weight and remains partially, the distal end portion 11 where the inflow port 8 is formed protrudes downward from the end edge of the skirt portion 4, and the corner portion 13 is formed at an angle of 90 degrees, so that the amount of the remaining liquid decreases from the vicinity of the inflow port 8 when the cap 30 is removed, and thus the ejection of the remaining liquid can be more effectively prevented when the cap is removed.

As described above, in the present embodiment, the ejection of the content liquid can be prevented in advance when the cap 30 is detached.

The content liquid to be added to the container 40 includes a dental adhesive such as a dental cement, a dental pretreatment agent such as a dental primer, a temporary polymer resin, a dental prosthetic material such as a base material, a dental lubricant, a dental etching material, a dental cleaning material, a dental material including a dental chemical, a medical adhesive, a chemical, an industrial adhesive, and a chemical, but the present invention is not limited thereto.

(second embodiment)

In the first embodiment, the wide portions 22 and the narrow portions 23 are formed at a radial interval by offsetting the nozzle portion 2 as a whole from the centers of the base portion 3 and the skirt portion 4. The present invention is not limited to this example, and the second embodiment of the present invention forms the radially widely spaced portions and the narrow portions by another means.

Fig. 6 shows an inner plug 1b according to a second embodiment of the present invention. In fig. 6, the same components as those of the first embodiment are not denoted by reference numerals, or the same reference numerals are denoted by reference numerals "b", and detailed description thereof is omitted.

As shown in fig. 6(a), (b), (c), and (d), the nozzle portion 2b of the second embodiment is formed concentrically with the base portion 3b as a whole. That is, the nozzle upper portion 5b and the nozzle lower portion 6b are formed concentrically with the skirt portion 4b, and are not deviated as in the first embodiment.

However, as shown in fig. 6(c) and (d), the skirt portion 4b further includes a partial inner peripheral wall 50 that partially surrounds the nozzle lower portion 6b on the radially inner side of the outer peripheral wall of the skirt portion 4 b. Thus, a portion 23b with a narrow radial gap is formed between the nozzle lower portion 6b and a portion of the inner circumferential wall 50 adjacent to the nozzle lower portion 6b, and a portion 22b with a wide radial gap is formed between the nozzle lower portion 6b and the inner wall of the skirt portion 4b adjacent to the nozzle lower portion 6b in a region where the portion of the inner circumferential wall 50 is not formed.

In the second embodiment, the same operational effects as those of the first embodiment can be achieved.

(third embodiment)

The third embodiment has an effect of further improving the first embodiment in which the content liquid 45 that moves and accumulates to the narrow portion 23 with time in the state (2) of fig. 4 cannot fall against its own weight.

Fig. 7 shows an inner plug 1c according to a third embodiment. In fig. 7, the same components as those of the first embodiment are not denoted by reference numerals, or c is denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in fig. 7(c) and (d), the distal end portion 11c has a projection 51 for guiding the drop falling, which extends in the axial direction, on the side surface on the side of the portion 23c with a narrow radial interval. The convex portion 51 protrudes in the radial direction within a range not exceeding the diameter of the columnar portion 10 c.

According to the third embodiment, as shown in the state (2) of fig. 4 and fig. 5, when the container 40 is stood up, the content liquid accumulated as time passes through the narrow portion 23c cannot fall against the self weight, and the falling of the liquid droplets is guided by the convex portion 51, so that the remaining liquid can be more effectively reduced.

Fig. 7 shows an example in which the projection 51 for droplet landing guide is added in the first embodiment, but the present invention can also be applied to the second embodiment, fourth to sixth embodiments described below, and the like.

(fourth embodiment)

In the first embodiment, the wide portions 22 and the narrow portions 23 are formed at a radial interval by offsetting the nozzle portion 2 as a whole from the centers of the base portion 3 and the skirt portion 4. A fourth embodiment of the present invention shows a modification of the first embodiment.

Fig. 8 shows an inner plug 1d according to a fourth embodiment of the present invention. In fig. 8, the same components as those of the first embodiment are not denoted by reference numerals, or d is denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in fig. 8(a), (b), and (c), the nozzle upper portion 5d of the fourth embodiment is formed concentrically with the base portion 3d and the skirt portion 4 d.

However, as shown in fig. 8(c) and (d), the nozzle lower portion 6d extends from a position offset from the lower surface 17d of the base portion 3d in the center of the skirt portion 4d, as in the first embodiment, and thereby a radially widely spaced portion 22d and a radially narrow portion 23d are formed between the nozzle lower portion 6d and the inner wall of the skirt portion 4d adjacent to the nozzle lower portion 6 d.

In this manner, in the fourth embodiment, the nozzle upper portion 5d and the nozzle lower portion 6d are not aligned, and therefore, as shown in fig. 8(c), the internal passage 9d has a bent portion in the nozzle lower portion 6 d. In the fourth embodiment, the cap and the container can be made to have the same axial center, because the nozzle upper portion 5d is positioned at the center of the inside plug 1d, in addition to the same operational effects as those of the first embodiment.

(fifth embodiment)

In the first and fourth embodiments, by offsetting at least the lower portion of the nozzle from the center of the skirt, in the second embodiment, by providing a portion of the inner circumferential wall 50, a radially widely spaced portion and a radially narrow portion are formed. The present invention is not limited to these examples, and the fifth embodiment of the present invention forms the portions having the wide radial intervals and the narrow portions by still another means. In the fifth embodiment, an example is provided in which the form of the lid is also different.

Fig. 9 shows an inner plug 1e according to a fifth embodiment of the present invention. In fig. 9, the same components as those of the first embodiment are not denoted by reference numerals, or the same reference numerals are denoted by reference numerals "e", and detailed description thereof is omitted.

As shown in fig. 9(a) to (d), the nozzle portion 2e of the fifth embodiment is formed substantially concentrically with the base portion 3e as a whole. That is, the tip end portions 11e of the nozzle upper portion 5e and the nozzle lower portion 6e are formed concentrically with the skirt portion 4e without being deviated as in the first embodiment.

However, as shown in fig. 9(c) to (e), the nozzle lower portion 6e has a portion 52 and a small portion 53 having a relatively large wall thickness of the outer peripheral portion (columnar portion 10e) of the internal passage 9e, a portion 23e having a narrow radial interval is formed between the portion 52 having a large wall thickness and the inner wall of the skirt portion 4e, and a portion 22e having a wide radial interval is formed between the portion 53 having a small wall thickness and the inner wall of the skirt portion 4 e.

In the fifth embodiment, the same operational effects as those of the first embodiment can be achieved.

Further, the base portion 3e of the inside plug 1e according to the fifth embodiment is a plate-like member 14e having an upper surface 16e and a lower surface 17e as shown in fig. 9(b) and (c), and further insertion of the inside plug 1e into the container 40 can be locked by engaging the plate-like member 14e with the end of the mouth portion 41 of the container 40 as shown in fig. 9 (d).

In the nozzle upper part 5e of the fifth embodiment, a cap 30e different from the cap 30 shown in fig. 2 is prepared without forming a screw for screwing with the screw of the cap (fig. 9 (d)). The cap 30e has a screw 54 formed on its inner wall, and the screw 54 is screwed to the screw 42 formed on the outer periphery of the side surface of the mouth portion 41 of the container 40, whereby the cap 30e can be attached to the container 40 in which the inner plug 1e is fitted. At this time, the projection 33e of the cap 30e can be fitted to the injection port 7e of the nozzle.

The fitting structure of the inside plug 1e and the structure of the cap 30e of the fifth embodiment can be applied to the above embodiments within a structurally possible range. For example, in the case of an embodiment in which the upper portion of the nozzle is not deviated from the center of the skirt, the fitting structure and the cap 30e shown in fig. 9(d) can be easily applied.

(sixth embodiment)

As the caps used for the inside plug of each embodiment of the present invention, the cap 30 shown in fig. 2 and the cap 30e shown in fig. 9(d) are explained. The sixth embodiment provides the caps in a different manner from these caps.

Fig. 10 shows a state where the hinge cover 1f is opened according to the sixth embodiment of the present invention, and fig. 11 shows a state where the hinge cover 1f is closed.

As shown in fig. 10, particularly fig. 10(c) and (f), the lower cover 3f of the hinge cover 1f includes a hinge support portion 64 and a locking portion 65 formed on the opposite side of the hinge support portion 64. An upper cover 60 is pivotably connected to the hinge support portion 64 via a hinge portion 61f and a spring portion 69. The upper cover 60 has a lever 62 elastically pivoted around a fulcrum 68 at an upper portion thereof, and a hook 63 is formed at a distal end portion of the lever 62. As shown in fig. 10(a) and (f), a projection 66 is formed on the back surface of the top plate of the upper cover 60, and a guard 67 is further formed around the projection 66.

When the upper cover 60 is pivoted toward the nozzle upper portion 5f, as shown in fig. 11(b) to (d) and (f), the end edge of the upper cover 60 and the end edge of the lower cover 3f are closely engaged with each other, and the hinge cover 1f is closed. At this time, the hook 63 of the lever 62 is snap-fit engaged with the latch 65 of the lower cover 3f, thereby being locked so as not to open the upper cover 60 accidentally. When the upper cover 60 is opened, the upper portion (the finger-lock portion side) of the lever 62 is pushed toward the axial core side, so that the engagement between the hook 63 and the locking portion 65 is easily released, and the upper cover 60 can be opened. When the upper cover 60 is closed, the projection 66 is inserted into the injection port 7f of the nozzle upper portion 5f as shown in fig. 11 (f). Thereby, during the closing of the upper cover 60, the risk of the content liquid inside the container leaking to the outside is eliminated, and further, the airtightness inside the container is maintained. Further, a liquid removing portion 21f is formed above the nozzle. As shown in fig. 10(a) and 10(f), the upper cover 60 is formed with a recessed portion 70f, which is a portion having a smaller thickness.

The configuration of the nozzle portion according to the sixth embodiment is exemplified by the first embodiment, but the configuration of any of the nozzle portions according to the second to fourth embodiments can be applied to the sixth embodiment.

(seventh embodiment)

The seventh embodiment provides a modification of the hinged lid according to the sixth embodiment. The same components as those in the sixth embodiment are denoted by the same reference numerals, and the same components as those in the sixth embodiment are denoted by the same reference numerals g, and only the differences will be described in detail.

Fig. 12 shows a state where the hinge cover 1g is opened according to the seventh embodiment of the present invention.

As shown in fig. 12(a), the hinge portion 61g of the seventh embodiment is formed wider than the hinge portion 61f of the sixth embodiment, and the strength of the hinge portion is improved. As shown in fig. 12(a) and (f), the concave portion 70g of the upper cover 60 is formed larger than the concave portion 70f of the sixth embodiment, and the concave portion 71g, which is a portion having a smaller thickness, is also formed in the lower cover 3 g. This can suppress an increase in weight due to formation of the larger hinge portion 61 g.

Further, the distal end portion 11f of the nozzle lower portion 6f of the sixth embodiment extends from the bottom surface 25 of the columnar portion 10f to form the corner portion 13, as in the first embodiment. In contrast, the nozzle lower portion 6g of the seventh embodiment extends up to the tip end portion 11g without a step. That is, in the seventh embodiment, the structure corresponding to the bottom surface 25 and the corner portion 13 of the columnar portion 10f is not formed (feature 1). The nozzle lower portion 6g of the seventh embodiment may have a shape different from the columnar portion according to the other embodiments, on the side surface of the portion from the lower surface to the tip end portion 11 g.

Further, while the slope 12f of the distal end portion 11f of the sixth embodiment is directed toward the wide portion 22f, the slope 12g of the distal end portion 11g of the seventh embodiment is directed toward the narrow portion 23g (feature 2).

The embodiments of the present invention have been described above, but the present invention is not limited to the above examples and can be modified as desired. Features of one embodiment can also be applied to other embodiments as long as they are possible in structure. For example, at least one of the above-described

features

1 and 2 relating to the nozzle structure of the seventh embodiment can also be applied to the first to sixth embodiments. Further, a mode in which any of the above-described

features

1 and 2 is applied in the seventh embodiment is also conceivable.

Claims

1. A member for use in the injection of a liquid,

comprising:

a nozzle part,

A base part engaged with the mouth part of the container,

A hollow cylindrical skirt portion extending from the base portion so as to be fitted into the mouth portion of the container,

the nozzle section includes:

a nozzle upper part extending from an upper surface of the base part on the opposite side of the skirt part and having an injection port for injecting the content liquid from the container;

a nozzle lower portion extending from a lower surface of the base portion, the nozzle lower portion being provided radially inward of the skirt portion and having an inlet port through which the content liquid from the container flows;

an internal passage formed from the inflow port to the injection port, passing through the nozzle lower portion and the nozzle upper portion,

the nozzle lower part has a tip part having an inclined surface on which the inflow port is formed, at least a part of the tip part protrudes from the skirt part,

a narrow portion is provided in the internal passage below the nozzle,

the member for liquid injection is characterized in that,

the aforementioned nozzle lower portion and the aforementioned skirt portion are formed to have a portion that is relatively wide and a portion that is narrow in a radial interval that is an interval between the aforementioned nozzle lower portion and an inner wall of the aforementioned skirt portion adjacent to the nozzle lower portion.

2. The member for liquid injection according to claim 1, wherein the nozzle lower portion has a columnar portion extending perpendicularly from a lower surface of the base portion, the columnar portion having a side surface and a bottom surface, the distal end portion extending from the bottom surface.

3. The member for liquid injection according to claim 2, wherein the bottom surface and the end edge of the skirt portion are at the same height.

4. The member for liquid injection according to claim 2 or 3, wherein the narrow portion is formed in the columnar portion from a position having the same height as the bottom surface.

5. The member for liquid injection according to claim 2 or 3, wherein an edge portion where the side surface and the bottom surface meet forms a corner portion at an angle of 90 degrees.

6. The member for liquid injection according to claim 2 or 3, wherein the tip portion has a projection for guiding drop falling extending in the axial direction on a side surface on the side of the portion where the radial interval is narrow.

7. The liquid injection member according to claim 6, wherein the convex portion protrudes in a radial direction within a range not exceeding a diameter of the columnar portion.

8. The member for liquid injection according to claim 1, wherein the nozzle lower portion extends to the tip portion without a step.

9. A member for liquid injection according to any one of claims 1 to 3, wherein said nozzle lower portion extends from a position of said base lower surface which is offset from the center of said skirt portion, thereby forming said radially widely spaced portions and said narrow portions.

10. The member for liquid injection according to claim 9, wherein the nozzle upper portion extends from a deviated position of the upper surface of the base portion to be aligned with the nozzle lower portion.

11. The member for liquid injection according to claim 9, wherein only the lower nozzle portion is offset from the center of the skirt portion, and the upper nozzle portion extends concentrically with the skirt portion.

12. A member for liquid injection according to any one of claims 1 to 3, wherein the skirt portion further has a partial inner peripheral wall partially surrounding the nozzle lower portion on a radially inner side of the outer peripheral wall of the skirt portion, the radially narrow space portion is formed between the nozzle lower portion and the partial inner peripheral wall adjacent to the nozzle lower portion, and the radially wide space portion is formed between the nozzle lower portion and an inner wall of the skirt portion adjacent to the nozzle lower portion in a region where the partial inner peripheral wall is not formed.

13. The member for liquid injection according to any one of claims 1 to 3, wherein the nozzle lower portion has a portion where the wall thickness of the outer peripheral portion of the internal passage is relatively large and a small portion, the portion where the radial interval is narrow is formed between the portion where the wall thickness is large and the inner wall of the skirt, and the portion where the radial interval is wide is formed between the portion where the wall thickness is small and the inner wall of the skirt.

14. The liquid injection member according to any one of claims 1 to 3, wherein the length of the internal passage from the constriction portion to the injection port is 5mm or more.

15. The liquid injection member according to any one of claims 1 to 3,

the base part has: a top part having the upper surface and the lower surface, and a side part hanging from the top part,

the inner wall of the side surface portion is formed with a screw thread to be screwed with a screw thread formed over the outer periphery of the side surface of the mouth portion of the container.

16. The member for liquid injection according to any one of claims 1 to 3, wherein the base is a plate-like member having the upper surface and the lower surface, and the plate-like member is engaged with a distal end of the mouth of the container, whereby further insertion of the inner plug into the container is locked.

17. The member for liquid injection according to claim 15,

having a lid for closing said injection port by covering at least an upper portion of said nozzle,

a screw thread is formed on the inner wall of the aforementioned cap,

a screw thread for screwing with the screw thread of the cap is formed on the outer periphery of the side surface of the upper part of the nozzle.

18. The member for liquid injection according to claim 16, having a lid for closing said injection port by covering at least an upper part of said nozzle,

the inner wall of the cap is formed with a screw thread to be screwed with a screw thread formed over the outer periphery of the side surface of the mouth of the container.

19. The member for liquid injection according to any one of claims 1 to 3, having an upper cover for closing said injection port by covering at least an upper part of said nozzle,

the base is a lower cover fitted to the mouth of the container,

the upper cover and the lower cover are connected in a pivoting type openable and closable manner.

20. The member for liquid injection according to claim 19, wherein the upper lid is configured to be engaged with the lower lid in a snap-fit manner when closed.

21. A member for liquid injection according to any one of claims 17 to 18, wherein said cap has a projection portion which is inserted into said injection port when closed.

22. The member for liquid injection according to claim 19, wherein the upper cover has a protrusion portion which is inserted into the injection port when closed.

23. The member for liquid injection according to claim 17, wherein the nozzle has a liquid removing portion on an outer periphery of an upper portion thereof and a distal end portion thereof.

24. The member for liquid injection according to any one of claims 1 to 3, wherein the slope of the tip end portion of the nozzle lower portion is directed toward the wide portion.

25. The member for liquid injection according to any one of claims 1 to 3, wherein the slope of the tip end portion of the nozzle lower portion is directed toward the narrow portion.

26. A container for storing a content liquid, into which the member for liquid injection according to any one of claims 1 to 25 is fitted.