JPH0939995A - Plastic case which can be opened/closed by one-step operation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly open/close a lid body by one-step operation with a simple structure by a method wherein at the open end side edge of the lid body, a protuberance of which the cross section is tapered, is provided, and an engaging piece which is elastically movable inward by a groove part is integrally formed on a main body edge part at an area corresponding with the protuberance. SOLUTION: On the side edge of an open end part of a lid body 12 which is screwed with a container main body 11, a first engaging piece 15 with a mountain-shaped rib 16 and a valley part 17, of which the cross section is a corrugated shape, is provided facing down on the internal wall surface. In addition, on the internal bottom surface of the first engaging piece 15, a protuberance 18 of which the cross section is tapered is provided facing down. Then, on the side edge part of the container main body 11 at an area which corresponds with the tapered protuberance 18, a groove part 21 is provided, and a second engaging piece 22 the central part of which is elastically movable to the groove part 21 direction, is formed, and on the upper external wall surface, a mountain shaped rib 24 and a valley part 25 which are engaged with the first engaging piece 15, are provided. When the second engaging piece 22 is pressed, the fitting between the mountain-shaped ribs 16, 24 and the valley parts 17, 25 is released, and at the same time, the second engaging piece 22 comes slidably into contact with the tapered protuberance 18, and the lid body 12 is pushed up and opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-touch opening / closing type plastic case such as a foundation case, and more particularly to an opening / closing mechanism thereof.

[0002]

2. Description of the Related Art Conventionally, as a plastic case, for example, a foundation case, in which the container body and the lid are one-touch openable and closed, the open / close mechanism is a separate plastic part or metal fitting. , And these were assembled and constructed.

[0003]

However, in such a conventional one-touch opening / closing type plastic case, since the opening / closing mechanism assembles separate parts such as plastics and metal fittings, the manufacturing top is inferior and a failure easily occurs. There is a problem that the manufacturing cost also becomes high. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a plastic case that has a simple structure, can open and close the lid smoothly with one touch, and can significantly reduce the manufacturing cost. To aim.

[0004]

In order to solve the above problems, the present invention provides a one-touch opening / closing mechanism of a plastic case without using separate parts such as plastic and metal fittings.
The means to be able to form by integral molding was taken.

That is, the invention of claim 1 comprises: (a). A container body having an open top surface and a lid body hinged to one side edge of the container body, and (b). A first locking piece is provided so as to project downward on a side edge of the open end, and an inwardly projecting chevron rib and an outwardly recessed valley are connected to an inner wall surface of the first locking piece. (C). Forming a guide portion that is opposed to the first locking piece on the side edge of the open end of the lid through the groove portion and that is inclined downward in the direction in which the groove width is gradually widened. (D). A second locking piece that is elastically movable inward is provided at a side edge portion of the container body, and (e) an upper outer wall surface of the second locking piece. First
Mountain-shaped ribs and valleys that fit with the valleys and mountain-shaped ribs of the locking piece of are sequentially formed from the top to the bottom,
(f). When the lid body is pressed toward the container body, the chevron ribs of the first locking piece and the chevron ribs of the second locking piece are in sliding contact with each other, and the chevron ribs and the troughs of each other And the lid body and the container body are kept in a hermetically sealed state, and when the second locking piece is pressed inward, the engagement between the chevron rib and the trough is released, and The technical means has been taken such that the top back corner of the locking piece of No. 2 is brought into sliding contact with the tapered projection to press the lid body upward and automatically open the lid body.

The guide portion may be formed on a surface of one side of a tapered projection having a tapered cross section. Note that the top back corner of the second locking piece has a smooth curved surface in cross section, so that the sliding contact with the tapered protrusion can be made smoother. Further, the opening / closing operation of the lid can be made smoother by chamfering the top corner of the wall surface facing the second locking piece of the groove on the side edge of the container body.

In the one-touch opening / closing type plastic case of the present invention, when the second locking piece is pressed inward, the engagement between the chevron rib and the trough is released, and the second locking piece is released. The top and back corners of the slide contact with the guide, and this acts to push the lid upward, so that the lid can be smoothly opened with one touch. Further, since the opening / closing mechanism portion of the lid body is entirely formed by integral molding, it is easy to manufacture and the breakdown can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, description will be given based on an illustrated embodiment applied to a cosmetic case containing a cosmetic such as a foundation as an example of the one-touch opening / closing type plastic case of the present invention. 1 is an enlarged sectional view showing the opening / closing mechanism of the cosmetic case, FIGS. 2 and 3 are sectional views for explaining the operation of the opening / closing mechanism, and FIG. 4 is a state in which the lid is opened 180 degrees. Is a plan view, FIG. 5 is a side view thereof, and FIG. 6 is a perspective view showing an overall view of the cosmetic case.

First, as shown in FIGS. 4 to 6, this cosmetic case comprises a container body 11 having an upper surface opening, and a lid 12 hinged to one side edge of the container body 11.
In the illustrated example, the hinged portion of the lid body 12 is made of a thin wall portion (groove portion) of plastic, and the container body 11 and the lid body 12 are manufactured by integral molding. A central portion of the container body 11 serves as a storage portion 13 for cosmetics, and the storage portion 13 is sealed when the lid 12 is closed.

A first locking piece 15 is provided so as to project downward on the side edge 14 of the open end of the lid 12. As shown in FIG. 1, the inner wall surface of the first locking piece 15 is formed with a mountain-shaped rib 16 and a valley portion 17 having a corrugated cross-section in order from the lowermost portion to the upper portion. In the vicinity of the open end side edge 14 of the lid body 12, a projection 18 having a tapered cross-section is provided on the lower surface of the lid body 12 inside the first locking piece 15 so as to project downward. Therefore, a long narrow groove portion 19 is formed between the first locking piece 15 and the protrusion 18. Here, the outer inclined surface 18a of the projection serves as a guide for retracting the second locking piece 22 from the locked state in the releasing direction. Therefore, the structure may be such that the inner inclined surface 18b is not provided. It suffices that the inwardly inclined surface 18b abut against the upper front end of the wall surface 23 of the container body 11 so as to be guided.

A groove 21 is formed in a side edge 20 of the container body 11 substantially facing the tapered projection 18 so as to be dug downward from the upper surface, and as a result, the outer wall of the groove 21 is thin. And a central portion thereof serves as a second locking piece 22 that is elastically movable (or flexible) toward the groove portion 21. That is, the second locking piece 22 is integrally connected to the side edge 20 of the container body 11 only through the left and right sides, and therefore the groove 2
It is elastically movable in one direction. In addition,
The second locking piece 22 is elastically movable in the direction of the groove 21. However, even if the second locking piece 22 is pressed against the tapered projection 18 and then further pressed, the second locking piece 22 contacts the other wall surface 23 of the groove 21. As a result, it does not move substantially further.

Further, a mountain-shaped rib 24 having a corrugated cross section and a valley portion 25 are sequentially formed on the second locking piece 22 from the top to the bottom, and the valley portion of the first locking piece 15 is formed. The ribs 17 and the chevron ribs 16 can be aligned and fitted with each other. The top back corner 26 of the second locking piece 22 has a gently curved surface. In addition, the lower portion 27 from the top of the second locking piece 22 has a shape protruding outward,
When the lid body 12 is closed, the outer wall surface of this protruding portion is substantially flush with the outer wall surface of the first locking piece 15 of the lid body 12.

The outer wall surface of the projecting portion is formed with a plurality of grooves 28 extending laterally so as to prevent slippage, so that the restoring property after pressing is improved. Note that this portion also serves as the pressing portion 29. Also,
The slope 2 where the top corner of the wall 23 is also chamfered as shown
3a, so that the lid 12 can be opened and closed more smoothly.

From the viewpoint of smoother opening and closing of the lid body 12, as shown in FIG. 1, the thickness A of the chevron rib 24 of the second locking piece 22 is equal to the chevron shape of the first locking piece 15. It is preferable that the width B between the rib 16 and the intersection of the horizontal extension line and the tapered protrusion 18 be smaller than the width B. The height (from the top) C of the chevron rib 24 of the second locking piece 22 is First
Height (from the bottom) of the chevron rib 16 of the locking piece 15 of D
Preferably smaller.

The operation of the cosmetic case having the above structure will be described below. First, when opening the closed cosmetic case, the pressing portion 29 is pressed inward. As a result, as shown in FIG. 2, the mountain-shaped ribs 24 and the valleys 25 on the top of the second locking piece 22 are released from the fitting between the valleys 17 and the mountain-shaped ribs 16 of the first locking piece 15, and at the same time. The top back corner 26 of the second locking piece 22 abuts on the tapered surface of the tapered projection 18, and the tapered projection 18 makes the tapered projection 18 slope 23a on the top of the wall surface 23 of the groove 21 and the top of the second locking piece 22. It is sandwiched between the back surface corner portion 26 and being pressed, and is pushed upward by the pressing force, whereby the lid 12 is vigorously pushed upward. In this way, the cosmetic case is opened with one touch.

When the lid 12 is pushed down to close the cosmetic case, the chevron ribs 16 of the first locking piece 15 and the chevron ribs 24 of the second locking piece 22 are brought into sliding contact with each other as shown in FIG. However, once they are elastically warped in the mutually conceding direction and then further pushed down, the elastic force of these locking pieces causes the mutual ribs and troughs to engage with each other as shown in FIG. 1, and the cosmetic case is sealed. , The sealed state will be maintained.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various design changes can be made without departing from the scope of the present invention. For example, in the above embodiment, the groove 21
Although the top of the wall surface 23 is a chamfered slope, the slope does not necessarily have to be a slope. Further, the groove 28 of the pressing portion 29 can be appropriately changed or omitted. Although the cosmetic case has been described, the present invention is not limited to this and can be applied to all kinds of plastic cases.

[0018]

As described above in detail, according to the one-touch opening / closing type plastic case of the present invention, the lid can be smoothly opened and closed with one touch. In addition, since the opening / closing mechanism portion of the lid body is entirely formed by integral molding, the manufacturing is simple, there are few failures, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an opening / closing mechanism of a cosmetic case according to an embodiment of a one-touch opening / closing type plastic case of the present invention.

FIG. 2 is a cross-sectional view illustrating the operation of the opening / closing mechanism of the cosmetic case shown in FIG.

FIG. 3 is a cross-sectional view for explaining the operation of the opening / closing mechanism of the cosmetic case shown in FIG.

FIG. 4 is a plan view showing a state where the cosmetic case shown in FIG. 1 is opened.

5 is a side view of the cosmetic case shown in FIG.

FIG. 6 is a perspective view showing an overall view of the cosmetic case shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Container main body, 12 ... Lid body, 13 ... Accommodating part, 14 ... Side edge, 15 ... 1st locking piece, 16 ... Chevron rib, 17 ... Valley part, 18 ... Tapered projection, 18a ... Guide part 19 ... Groove portion, 20 ... Side edge, 21 ... Groove portion, 22 ... Second locking piece, 23 ... Wall surface, 24 ... Angle rib, 25 ... Valley portion, 26 ... Back corner portion, 28 ... Groove, 29 ... Pressing portion.

Claims (4)

[Claims] 1. A container main body having an open upper surface, and a lid body hinged to one side edge of the container main body, wherein a first locking piece faces downward on a side edge of an open end of the lid body. And an inwardly projecting chevron rib and an outwardly recessed valley are formed to be connected to each other on the inner wall surface of the first locking piece. A guide portion is formed which faces the first locking piece via the groove portion and inclines in a direction to gradually widen the groove width downward, and elastically moves inward at the side edge portion of the container body. A freely movable second locking piece is provided, and a chevron rib and a trough that fit with the troughs and chevron ribs of the first locking piece are provided on the upper outer wall surface of the second locking piece downward from the top. When the lid body is pressed toward the container body, the chevron ribs of the first locking piece and the chevron ribs of the second locking piece are slidably in contact with each other and are formed in order. The ribs and the troughs are fitted to each other to keep the lid and the container body in a sealed state, and when the second locking piece is pressed inward, the engagement between the chevron ribs and the troughs is released. Together
A one-touch opening / closing type plastic case, characterized in that the top back corner of the second locking piece is brought into sliding contact with the tapered projection to press the lid upward, thereby automatically opening the lid. 2. The guide portion is formed as a downwardly projecting tapered sectional projection on the inner bottom surface of the lid body, and the side of the container body at a portion of the lid body that substantially opposes the tapered projection. A groove portion dug downward from the upper surface is formed at the edge portion, and the outer portion of the groove portion is a thin portion whose left and right sides are connected to the container body, and the center portion thereof is elastically inwardly directed. The one-touch opening / closing type plastic case according to claim 1, wherein the second locking piece is formed so as to be movable. 3. The cross section of the top back corner of the second locking piece is a gentle curved surface.
One-touch opening and closing plastic case described. 4. The one-touch opening / closing type plastic case according to claim 1, wherein the top corner portion of the wall surface of the groove facing the second locking piece of the container body is chamfered.