JP6749277B2 - Wide-mouth container with movable core - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wide-mouth container equipped with a screw-in cap that can hold cosmetics and the like.

In a container for cosmetics or the like having a screw-in cap, it is important to keep airtightness between the cap and the edge of the container body in order to prevent alteration of the contents.

The invention described in Jitsubo No. 3152177 is a wide-mouth container in which a detachable small container is housed in the container body of a cosmetic container, in which a downward fitting groove is formed outside the edge of the small container and a screw is formed on the back surface. The lid is detachably attached to a screw on the edge of the container body, and when the lid is closed, the upper end of the edge of the small container comes into contact with the back side of the lid to seal the container. Further, it is described that an elastic member is provided on the back side of the lid in order to improve airtightness.

The invention described in JP-A-2005-144035 is a refill container having a screw-in cap and an inner tray for storing cosmetics. In the refill container, an annular packing and an inner tray edge portion which are assembled and held on the back surface of the cap when the cap is closed. The upper surface of the cap contacts the inside of the inner plate to make it airtight, and a stopper is provided on the cap to prevent over-tightening of the cap, so that the packing does not deform beyond the elastic range.

Noboru 3152177 JP-A-2005-144035

In the invention described in Jitsubo No. 3152177, the airtightness is enhanced by providing the elastic member on the back surface of the lid, but it is necessary that the edge portion of the small container presses the elastic member by the pressure of tightening the lid. .. In this case, it is necessary to rotate the cap against the friction between both members until a sufficient pressing force is generated between the elastic member and the edge of the container, and torsional deformation and wear of the packing due to friction also pose a problem. The friction generated at the contact portion between the core and the elastic member is essentially unnecessary for airtightness, and it is desirable that the torque is transmitted with high efficiency in the rotation axis direction without being lost by the friction.

The invention of JP-A-2005-144035 uses an annular packing to improve the airtightness of the container, but it is still necessary to slide the cap and the main body against friction, and the packing and the assembly structure are complicated. There is a problem.

It is an object of the present invention to solve these problems of the prior art, and to provide a wide-mouth container in which the cap can be easily attached and detached and which has high airtightness.

The present invention has a bottomed cylindrical outer container, a core that is rotatably assembled in a housing portion of the outer container, and a cap that is fixed to a screw on an outer periphery of an edge portion of the outer container, and is assembled to the outer container. In this state, only the center of the bottom surface of the bottom of the core is in contact with the bottom of the storage portion of the outer container, and an annular undercut joint is provided between the edge of the outer container and the edge of the core. By increasing the vertical width of the undercut recesses to be larger than the vertical width of the projections of the undercut joint, the core assembled inside the outer container will not move between the edge and the center of the bottom as the cap is tightened. The above object is achieved by a wide-mouthed container characterized by being elastically deformed during a period of time and moving from a normal state in which the edge is slightly depressed to a state in which the edge is largely depressed.

The cap may include a packing that is held on the back surface of the top plate of the cap body so as not to rotate. By using the elastic packing, the close contact between the cap side and the main body side is increased, and the airtightness can be improved. It is preferable that the packing has, for example, a disk shape or an annular shape, and has a property of causing sufficient friction between the packing surface and the upper surface of the core. In the present invention, twisting of the packing due to tightening of the cap is prevented, so that a simple disc-shaped packing can be used.

The present invention is also provided with an annular undercut joint between the edge of the outer container and the edge of the core, and makes the vertical width of the undercut recess larger than the vertical width of the projection of the undercut joint. By doing so, the core assembled inside the outer container can be elastically deformed between the normal state where the edge is slightly depressed and the edge is greatly depressed as the cap is tightened. Can be

The annular undercut joint has a mechanism for preventing the protrusion from being dropped by fitting the undercut, and the protrusion and the undercut are annularly arranged so that the core and the outer container can rotate relative to each other. Further, since the fitting portion between the outer container and the core is provided with play in the vertical direction, the edge portion of the core can move up and down.

When the core is attached to the outer container, the edge of the core is pushed up by the repulsive force of the core and the protrusion of the undercut coupling is pressed against one end of the undercut, and the core is It prevents it from rotating in the container. When the cap is tightened and the frictional force between the packing and the edge of the core exceeds the frictional force between the core and the outer container, the core rotates together with the cap and the packing, and the action of the screw part causes the edge to move. Moves downward. At this time, since the protrusion is separated from the end portion of the undercut, it can be rotated more easily.

The present invention also has an upper surface portion in which the upper edge portion of the core extends outward beyond the upper edge portion of the outer container, and a tubular portion extending downward from the outer periphery of the outer container. The undercut joint portion may be provided between the outer peripheral surface of the outer container and the outer surface of the outer container. By doing so, the user can push the core into the outer container and crimp the edge of the core for easy attachment/detachment. It can be removed from the outer container by putting your finger on it. Therefore, it is suitable when the core is replaceable as a refill.

The shape of the core may be, for example, a curved surface with the bottom protruding downward, and when assembled in an outer container, only the center of the bottom of the core may be in contact with the bottom of the storage part of the outer container. it can. This reduces the contact area between the core and the outer container and facilitates rotation of the core when the cap is tightened. Further, by deforming the curved surface portion that is projected by the compressive force, the edge portion elastically moves up and down, and an optimum repulsive force can be obtained.

Further, if a small protrusion is provided in the central portion on the lower side of the bottom of the core, the contact between the core and the bottom of the outer container is limited to the tip of the protrusion, so that the rotation becomes smoother.

A longitudinal sectional view showing a state in which a core is attached to an outer container according to an embodiment. Enlarged view of the edge of Figure 1 FIG. 1 is a vertical sectional view showing a state in which a cap is further attached to the wide-mouthed container of FIG. Enlarged view of the edge of FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 is a vertical cross-sectional view of the container body with the cap removed, and FIG. 2 is a vertical cross-sectional view of the container and the cap with the cap attached.

The wide-mouthed container of the present embodiment is a cosmetics container including a container body composed of an outer container 1 and a core 2, and a screw-on cap composed of a cap body 3 and a packing 4. The core 2 is sold as a refill in which cosmetics are filled and hermetically sealed, and the user can attach and detach the core 2 by himself/herself.

The outer container 1 is a bottomed cylindrical container having a storage portion 1a for the core 2, and an upper portion of the cylindrical portion serves as a small-diameter edge portion 1b to which the cap is fitted, and is provided with an external screw. An annular undercut 1c for core attachment is provided on the upper side of the outer screw.

The core 2 has a bottom portion 2a formed of a curved surface projecting downward, the height of the bottom portion 2a to the edge is slightly higher than the height of the storage portion 1a in the outer container, and the tip is the upper end of the edge of the outer container 1. A ring-shaped upper surface portion 2b is formed by extending over the outer periphery of the outer container 1 and the outer periphery of the outer container 1 forms a cylindrical portion corresponding to the outer surface of the edge portion. Inside the tubular portion, an annular continuous protrusion (protruding ridge portion 2c) that fits into the undercut 1c at the lower outer edge of the outer container is provided. Since the vertical width of the undercut 1c of the outer container 1 is larger than the vertical width of the protruding portion 2c of the core 2, the edge of the core is engaged with the edge of the outer container with play vertically. doing. At the center of the bottom of the core 2, a small protrusion 2d that abuts on the bottom of the storage portion 1a of the outer container is provided.

The cap body 3 has a top end cylindrical shape in which a cylindrical tubular portion 3b hangs from the outer circumference of a disc-shaped top portion 3a, and engages with a screw of an edge portion 1b of the outer container 1 on the inner surface of the tubular portion 3b. Internal threads are provided. A disc-shaped packing 4 made of an elastic material is fixed to the lower surface of the top portion 3a by adhesion.

To attach the core to the outer container, push the core in from the mouth of the outer container with the cap removed, and the cylindrical portion of the core will be deformed and the protrusion 2c on the back surface will be below the outer edge of the outer container. It fits into the undercut of and does not fall off. To remove the core, put your finger on the tubular part and pull up.

In the state where only the core is attached, the small protrusion 2d at the bottom of the core is pushed to the bottom of the outer container, so that the edge of the core is urged slightly upward, and the ridge 2c as shown in FIG. It is in a state of being stopped by being restricted by the upper end of the undercut 1c. At this time, friction occurs between the protrusion 2c and the upper end surface of the undercut 1c, so that the core 2 is prevented from rotating in the outer container 1 during use.

In order to tighten the cap, if the cap is fitted onto the outer container and twisted as in a normal container, the cap descends while rotating due to the action of the screw portion. At this time, since the small protrusion 2d of the core 2 is in contact with the bottom of the storage portion, the elastic force of the core causes the packing 4 and the upper surface portion 2b of the core 2 to closely contact each other, but between the packing 4 and the core 2. Since the frictional force of the core is larger than the frictional force between the core 2 and the bottom of the outer container, the core 2 rotates together with the cap body 3 and the packing 4, and the edge moves so as to sink from the upper end of the movable range. ..

With the tightening of the cap, as shown in FIG. 4, the edge of the core 2 moves from the upper position to the lower position where the elasticity due to the deformation of the core becomes airtight enough. In this embodiment, at this lower position, the upper end of the edge 1b of the outer container abuts the lower surface of the upper surface 2b of the core to correct the inclination of the core 2, but it does not contact. It can also be configured.

1 Outer container 1a Storage part 1b Edge part 1c Undercut 2 Core 2a Bottom part 2b Top surface part 2c Ridge part 2d Small projection 3 Cap 3a Top part 3b Cylindrical part 4 Packing

Claims (3)

A bottomed cylindrical outer container, having a core that is rotatably assembled in the housing portion of the outer container and a cap that is fixed to a screw on the outer periphery of the edge of the outer container, and in a state assembled to the outer container, Only the center of the bottom surface of the bottom of the core is in contact with the bottom of the storage part of the outer container, and an annular undercut joint is provided between the edge of the outer container and the edge of the core. By making the vertical width of the undercut recesses larger than the vertical width of the protrusions on the inner part, the core assembled inside the outer container is elastic between the edge and the center of the bottom as the cap is tightened. A wide-mouth container characterized by being deformed and moving from a normal state in which the edge is slightly depressed to a state in which the edge is largely depressed.
The upper end of the edge of the core extends outward beyond the upper edge of the outer container, and has a tubular portion extending downward from the outer periphery of the outer container. The wide-mouth container according to claim 1, wherein the undercut joint is provided between the outer surface and the outer surface of the portion.
The bottom of the core is a curved surface that projects downward, and a small protrusion that protrudes further is provided in the center of the bottom bottom surface of the core.When assembled in an outer container, only the small protrusion on the bottom bottom surface of the core The wide-mouthed container according to claim 1 or 2, wherein is in contact with the bottom of the storage portion of the outer container.

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