JPH0318368Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a cap locking structure for preventing loosening of a screw-on cap attached to the mouth edge of a container containing a semi-liquid or oily liquid.

For example, many cosmetic containers filled with lotions, emulsions, etc. have relatively precise sealing structures to prevent the expensive contents from seeping or leaking out of the container when not in use. Such a sealing structure is not fully effective due to loosening of the cap, and accidents frequently occur in which the contents are accidentally exposed. That is, in containers for filling semi-liquid substances such as cosmetics, a flexible hard resin cap with a screw on the inner circumference is screwed onto the container body with a screw on the outer circumference of the mouth. It is common to use a so-called screw-on cap that is attached to the cap, but in this case, the screwed cap naturally returns in the opposite direction to the screw-in direction due to the elastic restoring force caused by the deformation of the material. As a result, there is a strong tendency for the cap to become loose. This tendency becomes even more pronounced when the semi-liquid or oily liquid of the contents adheres to the screws on the outer peripheral surface of the lip of the cosmetic container, as the contents act as a lubricant. As a result, the cap becomes loose, which reduces or invalidates the sealing function of the container, and in severe cases, the contents may accidentally leak out when carried in a handbag, etc., causing troublesome troubles. It also became the cause of many problems.

Therefore, as a way to effectively solve this problem, slits (circumferential grooves) have recently been introduced in the screw threads of caps.
It was proposed that the cap be provided with a cap, and this method was actually quite effective in preventing the cap from loosening, but on the other hand, this method had the disadvantage that it was difficult to manufacture the cap.
In other words, this type of cap is usually manufactured by molding a flexible hard resin, but in this case it is very difficult to process the mold to provide the required slits in the molded cap. It became.

In view of the above-mentioned problems, the present invention aims to provide a device that is easy to manufacture and has a sufficient locking function, and also has a structure that allows it to detect when screwing is complete. , its characteristics are that a female thread 9 and a male thread 3 are provided on the inner circumferential surface of the cap 4 made of a flexible hard resin and on the outer circumferential surface of the opening rim 2 of the container body 1, respectively; These screws 3 and 9 are screwed together, and the cap 4
In the cap mounting structure in which the cap is screwed onto the mouth edge 2 of the container body 1, the mouth edge 2 is provided with an engaging portion 13 and a stopper 14 that protrude below the male thread 3 and outward from the male thread 3. The cap 4 has a cap body 5 whose upper end is closed and opens downward, and an inner cap body 8 disposed within the cap body 5. The cap body 8 is
It has an inner cylinder part and an outer cylinder part which are double-layered inside and outside, and a bottom wall part connecting the bottoms of both cylinder parts, and the inner cylinder part is closed at the upper end and the upper end of the cap body 5 The outer cylindrical portion is fitted onto the inner circumferential surface of the cap main body 5, and is open downwardly, and the female thread 9 is provided on the inner circumferential surface of the cap body. When the cap 4 is screwed onto the container body 1, a thin-walled engaging portion is provided on the bottom surface of the portion, which detachably engages with the engaging portion 13 through elastic deformation in the radial direction almost simultaneously when the screwing is completed. A piece 15 and a thick stopper piece 16 that abuts the stopper 14 are provided in a downwardly protruding shape, respectively, and the engaging piece 15 and the stopper piece 16 are located below the female screw 9 and outward from the female screw 9. At a point placed in a position.

Hereinafter, embodiments of the present invention will be explained based on the drawings. In Figs. 1 to 4, 1 is a container body made of glass or hard resin that is filled with semi-liquid or oily liquid such as cosmetics; A male screw 3 is provided on the outer circumferential surface of the mouth edge 2. Reference numeral 4 denotes a cap made of a flexible hard resin such as polypropylene, and includes a cap body 5 whose upper end is closed and opens downward, and the cap body 5.
A side decorative body 6 is fitted and attached to the outer peripheral surface of the cap, a top decorative body 7 is fixed to the upper surface of the cap main body 5, and an inner cap body 8 is fitted and attached to the inner peripheral surface of the cap main body 5. There is. The inner cap body 8 has an inner cylinder part and an outer cylinder part which are double-layered inside and outside, and a bottom wall part that connects the bottoms of both cylinder parts. The inner cylinder part is
The upper end is closed and comes into contact with the inner surface of the upper end of the cap main body 5, and is open downward, and furthermore, a female screw 9 is provided on the inner circumferential surface of the cap, which can be freely engaged with the male screw 3. It is being The outer cylindrical portion is fitted onto the inner circumferential surface of the cap body 5. A sealing packing body 10 is also provided at the upper end of the inner cap body 8.
is installed. On the other hand, an inner plug body 11 is fitted to the upper end of the mouth edge portion 2 .

A circumferential projecting wall 12 is provided at the lower end of the mouth edge portion 2, that is, below the male thread 3 and protruding outward from the male thread 3, and a circumferential projecting wall 12 is provided on the upper surface side of the projecting wall 12 in a substantially radial direction. Correspondingly, an engaging portion 13 and a stopper 14 are provided in a protruding manner.

On the other hand, the bottom surface of the bottom wall portion of the inner cap body 8 of the cap 4 is also provided with a thin-walled engagement member that is elastically deformable in the radial direction and is located outwardly from the female thread 9 in correspondence with the engaging portion 13 and the stopper 14. A mating piece 15 and a thick stopper piece 16 are provided to protrude downward, and the cap 4 is screwed onto the opening rim 2, and the upper end surface of the inner plug body 11 is in close contact with the seal body 10 in a screwed-in completed state. At approximately the same time, the engaging portion 13 and the engaged piece 15 are removably engaged, and each stopper 14 and the stopper piece 16 are configured to contact each other so as to be able to move toward and away from each other. That is, as shown in FIG.
When the female screw 9 of the cap 4 is screwed in the direction of arrow A, the outer surface of the engaging portion 13 and the inner surface of the engaged piece 15 first come into contact with each other, and when the female screw 9 of the cap 4 is screwed further, the engaging portion 1
3. The inner surface of the engaged piece 15 is slid along the outer surface,
Due to this relative sliding, the engaged piece 15 is urged outward in the radial direction and is elastically deformed outward in the radial direction as shown by the imaginary line. After that, if you spiral it further,
Sliding between the outer surface of the engaging portion 13 and the inner surface of the engaged piece 15 is released, and the engaged piece 15, which had been elastically deformed radially outward, elastically returns to its initial position radially inward.
Here, as shown in FIG. 3, the inner peripheral surface stepped portion 17 of the engaged piece 15 and the engaging surface 18 of the engaging portion
A state is obtained in which the screws 3 and 9 are engaged in the direction in which the screws 3 and 9 are screwed back, and the engaging portion 1
Due to the collision between the outer surface 3 and the inner surface of the engaged portion 15, a slight sound or a tactile response is sensed. And at this time, stopper 1
4 and the inner peripheral surface stepped portion 20 of the stopper piece 6
are configured so that they can come into contact with each other in a manner that allows them to move toward and away from each other.

Also, when loosening the cap 4, the engaging portion 13
When the cap 4 is rotated in the screwing direction against the engagement force between the engaging surface 18 and the stepped portion 17 of the engaged piece 15, the engaged piece 15 is elastically deformed and the engaging portion 13
A state is obtained in which it rides on the outer surface, and the engagement is released at this point.

The embodiment of the present invention is constructed as described above, and when the cap 4 is screwed onto the mouth edge 2 of the container body 1, the engaging surface 18 of the engaging portion 13 and the engaged surface are connected almost simultaneously when the screwing is completed. The state of engagement of the mating piece 15 with the stepped portion 17 is obtained, and the point at which the screwing is completed can be clearly confirmed by the slight sound and tactile sensation generated during this engagement. Therefore,
When screwing the cap 4 onto the container body 1, unnecessary over-tightening of the cap 4 can be prevented, and damage caused by over-tightening of the cap 4 can be prevented. Furthermore, since the time point at which the screwing is completed can be clearly confirmed, there is no risk that the cap 4 will be left in an incompletely screwed state. In addition, when the screwing is completed, the cap 4
Even if the cap 4 attempts to return in the opposite direction to the screwing direction due to the elastic recovery force of the female screw 9,
Since the engagement between the engaging portion 13 and the engaged piece 15 prevents this, there is no risk of loosening, and therefore,
The conventional problem caused by loosening of the cap 4 can be solved. Further, when the engaging portion 13 and the engaged piece 15 are engaged, a stopper 14 and a stopper piece 16 are provided which come into contact with each other so as to be able to move toward and away from each other, so that subsequent spiral movement is prevented. Even if the cap 4 and the container body 1 are asymmetrical in shape around the axis, the cap 4 and the container body 1 are always aligned, and the appearance is not impaired in any way. Also, the engaging part 1
3. It has a simple structure in which the engaged piece 15, the stopper 14, and the stopper piece 16 are provided protrudingly, and is easy to manufacture.

Furthermore, the stopper 14 prevents the cap 4 from being overtightened.
This is a structure in which loosening of the cap 4 is prevented by the engagement between the engaging portion 13 and the engaged piece 15, and each prevention function is divided into two parts. Because of the configuration, the stopper piece 16
The engaged piece 15 can be made thicker to make it stronger, and the engaged piece 15 can be made thinner so that it can be elastically deformed more easily. Therefore, engagement and disengagement operations between the engaging portion 13 and the engaged piece 15 can be performed smoothly and without difficulty.

As described above, the present invention is provided with an engaging part and a stopper on the mouth edge, an engaged piece and a stopper piece on the cap, and when the cap is screwed onto the container body, when the screwing is completed, At the same time, due to the return of the elastic deformation of the engaged piece, the engaged piece and the engaging portion are releasably engaged, and the stopper piece and the stopper are in contact with each other. You can clearly confirm when the screwing is complete by the slight sound and tactile sensation that is emitted during the process, and also prevent damage caused by over-tightening the cap. Furthermore, since the point at which the screwing is completed can be clearly confirmed, there is no risk of leaving the cap in an incompletely screwed state. In addition, the structure prevents over-tightening of the cap by the contact between the stopper and the stopper piece, and prevents loosening of the cap by the engagement between the engaging part and the engaged part. Since it has a separate structure, the stopper piece can be made thicker and stronger, and the engaged piece can be made thinner and more easily elastically deformed. Engaging and disengaging operations can be performed smoothly and effortlessly. The cap has a cap body and an inner cap body that is fitted into the cap body, and the inner cap body is provided with an engaged piece, so that the cap body and the inner cap body are respectively required. For example, in consideration of operability, the cap body is made of a relatively hard resin, and the inner cap body is made of a hard resin. Among them, it is possible to make the thin engaged piece more elastically deformable by forming it from a relatively soft resin. Furthermore, even if the inner cap body is made of a relatively soft resin as described above, the stopper piece is provided on the inner cap body completely separately from the engaged piece, so only the stopper piece is thick. As a result, the stopper piece can be made to have a strong structure without impeding the function of the engaged piece in any way.
Further, the inner cap body has an inner cylinder part and an outer cylinder part which are double-layered inside and outside, and a bottom wall part connecting the bottom parts of both cylinder parts, and the outer cylinder part is attached to the inner surface of the cap body. Because they are fitted together, the inner cap body can be formed with a relatively small amount of resin, and the deformation and displacement of the bottom part, which is prone to deformation and displacement in the inner cylinder part, can be controlled by the cap body. Can be securely screwed onto the edge of the mouth. In addition, since the engaged piece and the stopper piece are each provided in a downwardly projecting shape on the bottom surface of the bottom wall of the inner cap body, the engaged piece can be made thin regardless of the shape of the inner cap body. The structure can be easily elastically deformed, and the stopper piece can have a thick and strong structure.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line from Fig. 1, Fig. 3 is a sectional view taken from Fig. 2 - sectional view taken from the line, and Fig. 4 is an operation explanatory diagram. be. DESCRIPTION OF SYMBOLS 1... Container body, 2... Mouth edge, 3... Male thread, 4... Cap, 9... Female thread, 13... Engaging portion, 14... Stopper, 15... Engaged piece, 1
6...Stopper piece.

Claims (1)

[Claims for Utility Model Registration] A female thread 9 and a male thread 3 are provided on the inner peripheral surface of the cap 4 made of a flexible hard resin and on the outer peripheral surface of the opening rim 2 of the container body 1, respectively. In a cap mounting structure in which the screws 3 and 9 are screwed together and the cap 4 is screwed onto the mouth edge 2 of the container body 1, a male thread 3 is attached to the mouth edge 2 below the male thread 3 and An engaging portion 13 and a stopper 14 that protrude further outward are provided corresponding to each other in the approximately radial direction, and the cap 4 includes a cap body 5 whose upper end is closed and opens downward, and a cap body 5 disposed within the cap body 5. An inner cap body 8 is provided, and the inner cap body 8 includes:
It has an inner cylinder part and an outer cylinder part which are double-layered inside and outside, and a bottom wall part connecting the bottoms of both cylinder parts, and the inner cylinder part is closed at the upper end and the upper end of the cap body 5 The outer cylindrical portion is fitted onto the inner circumferential surface of the cap main body 5, and is open downwardly, and the female thread 9 is provided on the inner circumferential surface of the cap body. When the cap 4 is screwed onto the container body 1, a thin-walled engaging portion is provided on the bottom surface of the portion, which detachably engages with the engaging portion 13 through elastic deformation in the radial direction almost simultaneously when the screwing is completed. A piece 15 and a thick stopper piece 16 that abuts the stopper 14 are provided in a downwardly protruding shape, respectively, and the engaging piece 15 and the stopper piece 16 are located below the female screw 9 and outward from the female screw 9. A structure that prevents the cap from loosening.