JP5008837B2 - Cap with dropper - Google Patents

Description

  The present invention relates to a cap with a dropper used for a pharmaceutical container, a cosmetic container, and the like.

The screw-type cap screwed into the container mouth portion is provided with a packing between the inner surface of the top wall of the cap and the upper surface of the container mouth portion in order to ensure sealing performance.
In this cap, if the packing is kinked when the lid is closed, a restoring force is exerted to return the kinking to the original state, and the cap is loosened. Therefore, there is a risk that the contents stored in the container may leak.

Therefore, in order to prevent the cap from loosening, the following cap has been developed (for example, see Patent Document 1). That is,
A locking circumferential groove located at the upper end or the lower end is formed on the outer peripheral wall surface of the cylindrical mouth-neck portion of the container body, and corresponds to the locking circumferential groove of the container body on the upper or lower part of the inner peripheral wall surface of the lid. Screw cap with locking piece.

Utility Kaihei 2-11052

The conventional example has the following problems.
(1) Since the locking piece is provided on the inner peripheral wall surface of the lid, the bending allowance of the locking piece is restricted. This means that when the lid is opened and closed by rotating the cap and engaging or disengaging the engagement piece with the engagement circumferential groove, a large frictional resistance is generated on the engagement piece. A large rotational torque is required. Therefore, it is difficult for a person with weak power to smoothly open and close the cap.

(2) The engaging force between the locking piece (locking protrusion) and the locking circumferential groove is not sufficient. When a flexible material with high elasticity is used for the packing, for example, when a consumer carries the container in a bag, the screw loosens due to the restoring force of the packing that is in contact with the inner surface of the top wall of the cap. The contents will be leaked. In order to increase the engagement force, it is conceivable to increase the overlap margin between the locking piece (locking protrusion) and the locking circumferential groove, but the locking piece is provided on the inner surface of the inner peripheral wall of the lid. For this reason, the degree of freedom in designing the locking projection is extremely limited.
(3) A cap used for a container having a relatively small capacity containing cosmetics has a small diameter and is difficult to pick by hand.

  In view of the above circumstances, an object of the present invention is to provide a cap that facilitates opening and closing of the cap and prevents contents from leaking out.

The present invention provides a screw portion that is screwed into the container mouth portion on the inner surface of the side wall, and inserts a dropper into a dropper insertion port on the top wall continuous with the side wall, and the inner surface of the top wall has a packing function. A cap with a dropper abutted against the upper surface of the flange portion of the dropper formed of an elastic flexible resin ; having a diameter larger than the inner diameter of the side wall at the lower end of the side wall; wall thickness continuously thin cylindrical retaining wall provided than on the inner surface of the locking cylinder wall, a locking projection that engages the bead of the container mouth portion is provided, the locking tube wall, the engagement A longitudinal weakening portion that extends in the axial direction from the lower end to the upper end of the stopper cylinder wall and assists the deformation of the locking cylinder wall is provided.

The weakened part of this invention is a notch part or a thin part . An outer peripheral surface extending from the side wall of this invention the locking tube wall, characterized by providing in succession finger hook protrusion.

  According to the present invention, a locking cylinder wall having a diameter larger than the inner diameter of the side wall is continuously provided at the lower end portion of the side wall, and a locking projection that engages with a bead of the container mouth is formed on the inner surface of the locking cylinder wall. Since the vertical weakening portion is provided on the locking cylinder wall, the locking protrusion engages with the bead of the container mouth when the lid is closed. Therefore, since the displacement of the cap in the axial direction is restricted, the loosening of the screw can be prevented, so that there is no possibility that the contents leak out.

  In addition, the locking cylinder wall is more flexible than the side wall, and the locking protrusion is easily engaged with and disengaged from the bead. Therefore, when the cap is rotated to open or close, the locking protrusion receives a greater frictional resistance than the conventional example. There is nothing. Therefore, since a large rotational torque is not required, the cap can be opened and closed smoothly.

  Furthermore, since the finger hooking projections are provided on the outer peripheral surface from the side wall to the locking cylinder wall, even a small cap can be reliably and easily rotated. Further, the locking cylinder wall provided with the finger hooking projection is less likely to bend than the other locking cylinder walls, and the loosening of the screws can be more effectively prevented.

An embodiment of the present invention will be described with reference to FIGS.
A cap 3 with a dropper 2 is screwed to the mouth 1 of a small container in which cosmetics (liquid) is stored.

  The dropper 2 is a knob 5 formed of an elastic flexible resin (eg, polystyrene, synthetic rubber, elastomer, etc.) and a hard resin (eg, polyethylene, polypropylene, glass, etc.) fixed to the knob 5. And a nozzle 7 formed. A flange portion 9 is provided at the lower end portion of the knob 5 of the dropper 2 and has a packing function.

The lower surface 9 a of the flange portion 9 is in contact with the upper end surface of the container mouth portion 1, and the upper surface 9 b is in pressure contact with the inner surface of the top wall 12 of the cap 3 . A dropper insertion opening 14 is provided at the center of the top wall 12.

  The peripheral edge of the top wall 12 is continuous with the side wall 16. The side wall 16 has, for example, an inner diameter L of 20 mm and a wall thickness T of 1.1 mm. On the inner surface of the side wall 16, a female screw 16 a that engages with the male screw 1 a of the mouth portion 1 is provided.

  A locking cylinder wall 20 is provided continuously at the lower end of the side wall 16. The locking cylinder wall 20 has, for example, an inner diameter L1 of 24 mm and a larger diameter than the inner diameter L of the side wall 16, and a wall thickness T1 of 1.0 mm. It is formed thinner than T. Therefore, the locking cylinder wall 20 is more easily bent than the side wall 16.

A locking protrusion 24 that engages with the bead 22 of the container mouth 1 is provided at the lower end of the inner surface of the locking cylinder wall 20. The locking cylinder wall 20 is provided with a V-shaped cutout portion 26. The cutout portion 26 is a so-called longitudinal weakening portion and assists the deformation of the locking cylinder wall 20. It has a function. The notches 26 extend in the axial direction from the lower end 20a to the upper end (large diameter starting end) 20b of the locking cylinder wall 20, and are formed in six circumferentially spaced intervals.
The locking projection 24 is divided into six arc-shaped locking projections (center angle of about 60 degrees) by the notch 26. The circumferential length of the locking projection is as follows. For example, the central angle may be set to 5 degrees, and the locking projections may be arranged at appropriate intervals in the circumferential direction.

  The shape, size, number, and the like of the notches 26 are appropriately selected as necessary. For example, one notch is selected, or a notch that is inclined with respect to the axial direction is selected. .

As the weakening portion, a perforation or a thin wall portion may be used instead of the notch portion 26 to assist the deformation of the locking cylinder wall 20 .

As shown in FIGS. 1 and 2, finger hooking projections 28 extending in the axial direction are provided on the outer peripheral surface from the upper side of the side wall 16 to the lower side of the locking cylinder wall 20. A pair of the finger projections 28 are provided so as to face each other at an interval of 180 degrees, are less likely to bend than the other locking cylinder walls 20, and effectively prevent the screws from loosening without unnecessarily increasing the frictional resistance. . The number, position, length, and the like of the finger hooking projections 28 are not limited to the embodiment and can be appropriately selected as necessary.

Next, the operation of the present embodiment will be described.
When opened:
The finger hooking protrusion 28 is grasped with a finger and the cap 3 is rotated in the direction of opening. At this time, since there is the finger hooking projection 28, it can be easily rotated even if the cap 3 is small.

  Then, the locking protrusion 24 that is in contact with the bead 22 is disengaged from the bead 22 while receiving frictional resistance, so that the engagement between the two is released. At this time, since the locking cylinder wall 20 is formed to have a diameter larger than the inner diameter of the side wall 16 and includes the notch portion 26, the locking cylinder wall 20 is more easily bent than the side wall 16, and the locking protrusion 24 is also easily deformed. The frictional resistance is greatly reduced as compared with the conventional example. Therefore, since the rotational torque of the cap 3 becomes small, it can be rotated easily.

  Further, the cap 3 is rotated in the same direction to remove it from the container mouth 1, and after the knob 5 is picked with a finger, when the finger is released, lotion is sucked into the nozzle 7, so that the cosmetic liquid is then applied to the palm or the like. Let it drip.

When closed:
The nozzle 7 is inserted into the container, the cap 3 is turned in the closing direction and screwed into the container mouth 1, the lower surface 9 a of the flange 9 is brought into contact with the upper end surface of the container mouth 1, and the upper surface 9 b Is pressed on the inner surface of the side wall 16.

  At this time, as described above, the locking cylindrical wall 20 is more easily bent than the side wall 16, and the locking projection 24 is also easily deformed, so that the locking projection 24 and the bead 22 can be smoothly engaged. I can do it. At this time, the portion (thick portion) corresponding to the finger hooking projection 28 of the locking cylinder wall is less likely to bend than the other portion, so that the locking projection corresponding to the thick portion is engaged in the other portion. The bead 22 is engaged more strongly than the stop protrusion.

By the engagement between the locking projection 24 and the bead 22, the displacement in the axial direction of the cap 3 is reliably restricted, Gillet I generated in the flange portion 9 (packing) in closed may try to return Even if the restoring force works, the cap 3 does not loosen. For this reason, leakage of contents can be prevented.

It is a top view which shows embodiment of this invention. It is the II-II sectional view enlarged view of FIG. It is a principal part enlarged view of the longitudinal cross-section which shows the state which mounted | wore the container with the cap.

Explanation of symbols

1 Container mouth 2 Dropper 3 Cap 5 Knob 9 Glass nozzle
9a Bottom surface
9b Top view
12 Top wall
16 Side wall
20 Locking cylinder wall
22 Bead
24 Locking protrusion
26 Notch
28 Finger hook projection L Side wall inner diameter L ₁ Locking cylinder wall inner diameter

Claims (3)

A threaded portion that is screwed into the container mouth is provided on the inner surface of the side wall, and a syringe is inserted into the dropper insertion port of the top wall continuous with the side wall, and the inner surface of the top wall has a packing function and is elastic. A cap with a dropper abutted against the upper surface of the flange portion of the dropper formed of a flexible resin ;
The lower end of the side wall is continuously provided with a locking cylinder wall having a diameter larger than the inner diameter of the side wall and thinner than the side wall ,
Provided on the inner surface of the locking cylinder wall is a locking projection that engages with the bead of the container mouth,
A cap with a dropper, characterized in that a longitudinal weakening portion is provided on the locking cylinder wall so as to extend in the axial direction from the lower end to the upper end of the locking cylinder wall and assist the deformation of the locking cylinder wall .   The cap with a dropper according to claim 1, wherein the longitudinally weakened portion is a cutout portion or a thin-walled portion. The cap with a dropper according to claim 1 or 2 , wherein finger hooking protrusions are continuously provided on an outer peripheral surface from the side wall to the locking cylinder wall.

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