JP4204892B2 - Mating structure of container and lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fitting structure between a container and a lid, which is a typical example of a fitting structure between an inner container and a lid in a food warming container.
[0002]
[Prior art]
A food heat insulation container such as a portable lunch jar is one in which an inner container such as a rice bowl or a soup bowl is stored in an outer container having heat insulation properties. A so-called bayonet fitting is used as a fitting structure between the inner container and the lid used as a rice cooker in this case (see, for example, Patent Document 1). And what has the bayonet fitting structure which developed further what was shown in the said patent document 1 is generally used nowadays. This will be described with reference to FIGS.
[0003]
FIG. 8 shows an example of an inner container of a food heat retaining container. This inner container is a lid-side fitting provided on the outer peripheral surface of the lid 3 on the inner peripheral surface of the container 1 having a circular opening, that is, the container-side fitting surface 2. It has a bayonet fitting structure for fitting the surface 4 so as to be rotatable in the circumferential direction. That is, a rectangular engagement protrusion 5 that is long in the circumferential direction is provided on the container-side fitting surface 2, and an L-shaped groove 6 that is engaged with the engagement protrusion 5 is provided on the lid-side fitting surface 4. As shown in FIG. 9A, the L-shaped groove 6 is formed in the height direction of the lid 3, and a longitudinal groove 7 having one end opened to the lower end of the lid-side fitting surface 4, and the longitudinal groove 7. And a lateral groove 8 formed continuously in the circumferential direction. The vertical groove 7 and the horizontal groove 8 and the width of the bent portion 9 moving from the vertical groove 7 to the horizontal groove 8 are formed such that the engagement protrusion 5 can be shifted with a margin. The length of the vertical groove 7 is about the thickness of the engaging protrusion 5, and the length of the lateral groove 8 is set to be several times the circumferential length of the protrusion 5. The end portion of the lateral groove 8 is closed. A rib-like edge 10 remains between the L-shaped groove 6 and the lower end of the lid-side fitting surface 4. The tip of the rib-like edge 10 is formed in a tapered shape so that the protrusion 5 can be smoothly inserted into the L-shaped groove 6.
[0004]
The lid-side fitting surface 4 of the lid 3 is formed to have a small diameter from the outer peripheral surface of the lid 3 by the width of the stepped portion 11, and the stepped portion 11 faces the upper end surface of the container 1 (see FIG. 9B). As shown in the figure, in the state where the engaging protrusion 5 is in contact with the inner side surface 8 a on the lower end side of the lateral groove 8, a fitting gap Δx is generated between the stepped portion 11 and the upper end surface of the container 1.
[0005]
A click projection 12 is formed on the rib-like edge 10 in the middle in the length direction of the inner side surface 8a of the lateral groove 8. The click protrusion 12 is formed in a semicircular shape having a height (Δx + α) obtained by adding a minute height α to the fitting gap Δx.
[0006]
Combinations of the engagement protrusions 5 and the L-shaped grooves 6 having the same configuration as described above are provided at a plurality of positions at equal intervals in the circumferential direction, and a bayonet fitting structure is configured. The cover 3 is placed on the container 1, the engagement protrusion 5 of the container 1 is fitted into the vertical groove 7 of the L-shaped groove 6 of the cover 3, and the engagement protrusion 5 is relatively moved to the lateral groove 8 by rotating the cover 3. Move in. When the engagement protrusion 5 rides on the click protrusion 12 and pulls the lid 3 against the container 1 to make the fitting gap Δx zero (see FIG. 9C), the upper end surface of the container 1 is the upper end surface of the lid 3. Since it hits the step portion 11, resistance is added to the user's hand turning the lid 3. When a further force is applied, the rib-like edge 10 is elastically deformed by α (see the two-dot chain line in FIG. 9C), and the engaging protrusion 5 gets over the click protrusion 12 and gives a click feeling to the user's hand. To complete the engagement. When the engagement is completed, the fitting gap Δx is generated. When an external force in the opening direction is applied to the lid 3, the engagement projection 5 and the click projection 12 interfere with each other due to the presence of the minute height α, thereby preventing the lid 3 from being arbitrarily removed. When the lid 3 is removed, a slight force is applied so that the engagement protrusion 5 gets over the click protrusion 12 in the reverse direction.
[0007]
[Patent Document 1]
Japanese Utility Model Publication No. 59-64025 (Fig. 2)
[0008]
[Problems to be solved by the invention]
When the container 1 and the lid 3 having the bayonet fitting structure as described above are manufactured by injection molding of synthetic resin, the engagement protrusion 5 is tilted by β toward the bottom of the container 1 (FIG. 9D). (See Fig.). When the container 1 having such an engagement protrusion 5 and the lid 3 are fitted, in the state where the engagement protrusion 5 is in contact with the inner side surface 8a of the lateral groove 8, as shown in FIG. The gap between the three step portions 11 and the upper end surface of the container 1 is Δx−β, which is narrower by β than in the above case. For this reason, the resistance when the engagement protrusion 5 gets over the click protrusion 12 increases, and the burden on the user who rotates the lid 3 increases.
[0009]
Accordingly, an object of the present invention is to provide a bayonet fitting structure that allows a lid to be smoothly fitted without a burden even when the above-described collapse of the engaging protrusion 5 occurs during molding.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides either a container-side fitting surface or a lid-side fitting surface, which are opposed to each other, between a container having a circular opening and a lid that is rotatably fitted to the container. A plurality of engaging protrusions are provided on one fitting surface, and a plurality of L-shaped grooves engaging with the engaging protrusions are provided on the other, and the L-shaped groove has one end opened at the end of the fitting surface. And a circumferentially extending lateral groove, and a click projection is provided on the inner surface of the lateral groove, and the engagement projection fitted from the open end of the longitudinal groove is transferred to the lateral groove, and the click projection is In the fitting structure between the container and the lid, which is overcome and engaged, the rib-like edge remaining between the L-shaped groove and the end of the fitting surface is provided with elasticity applying means, and the elasticity As an imparting means, the length of the engagement protrusion between the end of the lateral groove of the L-shaped groove and the end of the fitting surface It is obtained by adopting the configuration of forming a narrower separation groove width.
[0011]
As the other elastic applying means, before Symbol a through portion in the rising surface reaches the end of the mating surface from the groove bottom surface of the L-shaped grooves of the rib-like edge, the click projection and the through portion The structure provided over the range to include, the structure which provided the recessed part over the range including the protrusion for a click on the surface of the said rib-shaped edge part, etc. can be taken.
[0012]
When the above-mentioned elasticity is applied to the rib-like edge, the rib-like edge can be forcibly elastically deformed when the engaging protrusion that has fallen over the click protrusion is used. Without overloading the user.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The first embodiment shown in FIGS. 1 and 2 is an example of a bayonet fitting structure in an inner container (rice cooker) of a food warming container (see FIG. 5 described later), and basically the above-described conventional example. It is the same. That is, it is a bayonet fitting structure in which the lid side fitting surface 4 of the lid 3 is fitted to the container side fitting surface 2 of the container 1 having a circular opening so as to be rotatable in the circumferential direction. A long rectangular engagement protrusion 5 in the circumferential direction is provided on the fitting surface 2, and an L-shaped groove 6 in which the engagement protrusion 5 is engaged is provided in the lid-side fitting surface 4. As shown in FIG. 2A, the L-shaped groove 6 is formed in the height direction of the lid 3 and has one vertical groove 7 having one end opened to the lower end of the lid-side fitting surface 4, and the vertical groove 7. And a lateral groove 8 formed continuously in the circumferential direction.
[0014]
The vertical groove 7 and the horizontal groove 8 and the width of the bent portion 9 moving from the vertical groove 7 to the horizontal groove 8 are formed such that the engagement protrusion 5 can be shifted with a margin. The length of the vertical groove 7 is about the thickness of the engaging protrusion 5, and the length of the lateral groove 8 is set to be several times the circumferential length of the protrusion 5.
[0015]
The lid-side fitting surface 4 of the lid 3 is formed with a small diameter from the outer peripheral surface of the lid 3 by the stepped portion 11, and the stepped portion 11 faces the upper end surface of the container 1. As shown in FIG. 2 (b), in a state where the engagement protrusion 5 is in contact with the inner side surface 8 a on the lower end side of the lateral groove 8, the gap Δx fitted between the step portion 11 and the upper end surface of the container 1 is Arise.
[0016]
A click projection 12 is formed in the middle of the inner surface 8a of the lateral groove 8 in the longitudinal direction. The click protrusion 12 is formed in a semicircular shape having a height (Δx + α) obtained by adding a minute height α to the fitting gap Δx.
[0017]
The configuration different from the conventional case is that the separation groove 13 is provided between the terminal end portion of the lateral groove 8 and the lower end of the lid-side fitting surface 4, thereby the L-shaped groove 6 and the separation groove 13. The rib-like edge portion 10 is separated from the other lid-side fitting surface 4 in an island shape. The separation groove 13 is formed to be narrower than the length of the engagement protrusion 5, so that the engagement protrusion 5 does not fall into the separation groove 13. The tip of the rib-like edge portion 10 is formed in a tapered shape, and the projection 5 can be smoothly inserted into the L-shaped groove 6 as in the conventional case.
[0018]
A combination of the L-shaped groove 6, the separation groove 13, and the engagement protrusion 5 having the same configuration as described above is provided at a plurality of positions at equal intervals in the circumferential direction, and a bayonet fitting structure is formed. The cover 3 is placed on the container 1, the engagement protrusion 5 of the container 1 is fitted into the vertical groove 7 of the L-shaped groove 6 of the cover 3, and the engagement protrusion 5 is relatively moved to the lateral groove 8 by rotating the cover 3. Move in. When the engaging protrusion 5 rides on the click protrusion 12 and pulls the lid 3 toward the container 1 to make the fitting gap Δx zero (see FIG. 2C), the upper end surface of the container 1 is the lid 3. Since it hits the step portion 11, resistance is added to the user's hand turning the lid 3. When a further force is applied, the rib-like edge portion 10 is elastically deformed by α (see the two-dot chain line in FIG. 2C), and the engaging protrusion 5 gets over the click protrusion 12 to give a click feeling to the user's hand. To complete the engagement. When the engagement is completed, the fitting gap Δx is generated. Further, when an external force in the opening direction acts on the lid 3, the engagement projection 5 and the click projection 12 interfere with each other, so that the lid 3 is prevented from being arbitrarily removed. When the lid 3 is removed, a slight force is applied so that the engagement protrusion 5 gets over the click protrusion 12 in the reverse direction.
[0019]
Further, when the engagement protrusion 5 is tilted by β (see FIG. 2D), the rib-like edge 10 is easily deformed elastically because it is separated into islands by the separation groove 13. The rib-like edge portion 10 is elastically deformed by α + β, and the click projection 12 can be overcome with relative ease.
[0020]
FIGS. 3A to 3D show the case of the second embodiment. In this case, as a means for imparting elasticity to the rib-like edge 10, the groove bottom surface of the L-shaped groove 6 of the rib-like edge 10 is shown. A through portion 15 reaching the lower end portion of the lid-side fitting surface 4 is provided on the rising surface 14 from the side, and the through portion 15 is provided in a range including the portion of the click projection 12, that is, over almost the entire length of the rib-like edge portion 10. ing. When such a penetration part 15 is provided, since the thickness of the rib-shaped edge part 10 becomes thin, it becomes easy to elastically deform. Therefore, when the engagement protrusion 5 is tilted by β, the rib-like edge portion 10 is elastically deformed by α + β similarly to the case described above, and the click protrusion 12 can be overcome with relative ease.
[0021]
FIGS. 4A to 4C show the case of the third embodiment. In this case, as a means for imparting elasticity to the rib-like edge portion 10, the click protrusion 12 on the surface 16 of the rib-like edge portion 10. The concave portion 17 is provided over the entire range of the rib-like edge portion 10, that is, the entire length of the rib-like edge portion 10. When such a recess 17 is provided, the rib-like edge portion 10 is partially thinned so that it is easily elastically deformed, and the engaging protrusion 5 can easily get over the click protrusion 12 as described above. Can do.
[0022]
FIG. 5 shows the overall structure of a food heat insulation container using the container 1 and the lid 3 of each of the embodiments as a rice cooker 18. In this food warming container, the container body is constituted by a vacuum double container 19, a bottom member 21 and a shoulder member 22, and a heat insulating lid 23 is detachably covered on the shoulder member 22. The heat insulating lid 23 is firmly tightened against the container body by the buckles 24, 24 attached to the container.
[0023]
FIG. 6 shows a fourth embodiment. In this case, the lid 3 is formed by screw-fitting the lid upper member 3b to the lid lower member 3a with the lid upper member 3b on the outer peripheral surface thereof. The same L-shaped groove 6 and rib-like edge portion 10 as those in the above embodiments are formed in the lid lower member 3a, and the protrusion 5 on the inner surface of the container 1 is fitted and engaged with the L-shaped groove 6. is there. As shown in FIGS. 7A to 7C, a click projection 12 is provided on the inner surface 8a of the lateral groove 8 of the L-shaped groove 6, that is, the inner surface of the rib-shaped edge portion 10, and the clearance Δx between which the projection 5 fits. Is the same as in each of the embodiments described above, in which the rib-shaped edge 10 is elastically deformed by a minute height α and is overcome. The difference is that the regulating collar 25 protrudes outward from the lid lower member 3a, and is opposed to the regulating collar 25 and the upper end surface of the container 1 with the fitting gap Δx therebetween, and A packing groove 26 is provided on the restricting collar 25, and a packing 27 is attached to the packing groove 26. The upper surface of the packing groove 26 is composed of a lower end surface of the lid upper member 3b and a thread 28 of the lid lower member 3a. It is the point formed by.
[0024]
In this case, when the falling β due to the formation of the protrusion 5 occurs, the restriction collar 25 is elastically deformed and absorbed as shown in FIG. Since the rib-like edge 10 only needs to be elastically deformed by α, the conventional configuration, that is, no special elasticity applying means is required. The packing 27 prevents water from entering from the screw fitting portions of the lid lower member 3a and the lid upper member 3b.
[0025]
【The invention's effect】
As described above, according to the present invention, the rib-shaped edge forming the L-shaped groove is elastically deformed even if the engaging protrusion constituting the bayonet fitting structure on the fitting surface between the container and the lid collapses due to molding. Therefore, the engaging protrusion can smoothly get over the click protrusion, and the user is not burdened.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a first embodiment. FIG. 2 (a) is a front view of the same fitting portion. FIG. 1 (b) is a sectional view of the same fitting portion. FIG. 4 is a partial perspective view of the fitting portion of the second embodiment. FIG. 4B is a front view of the portion of FIG. 4A. FIG. 4D is a plan view of the portion of FIG. (A) Partial perspective view of the fitting portion of the third embodiment (b) Front view of the portion of (a) figure (c) Cross-sectional view of the fitting portion same as above [FIG. 5] Cross-sectional view of the food heat insulation container 6 is a cross-sectional view of the fourth embodiment. FIG. 7A is a front view of the fitting portion of the fourth embodiment. FIG. 6B is a cross-sectional view of the same fitting portion. FIG. FIG. 9 is an exploded perspective view showing the fitting structure between the container and the lid of FIG. 9A. FIG. 9A is a front view of the fitting portion of the conventional example, and FIG.
DESCRIPTION OF SYMBOLS 1 Container 2 Container side fitting surface 3 Lid 3a Lid lower member 3b Lid upper member 4 Lid side fitting surface 5 Engagement protrusion 6 L-shaped groove 7 Vertical groove 8 Horizontal groove 8a Inner side surface 9 Bent part 10 Rib-like edge 11 Step Portion 12 Clicking projection 13 Separation groove 14 Rising surface 15 Through portion 16 Surface 17 Recess 18 Rice cooker 19 Vacuum double container 21 Bottom member 22 Shoulder member 23 Thermal insulation cover 24 Buckle 25 Restriction collar 26 Packing groove 27 Packing 28 Screw thread

Claims (1)

A plurality of engaging projections on the fitting surface of the container-side fitting surface and the lid-side fitting surface that face each other between a container having a circular opening and a lid that is rotatably fitted to the container, and the other A plurality of L-shaped grooves that are engaged with the respective engaging protrusions are provided on each of the plurality of L-shaped grooves, and the L-shaped grooves are formed by a longitudinal groove having one end opened at the end of the fitting surface and a circumferential lateral groove continuous therewith. In addition, a click projection is provided on the inner side surface of the lateral groove, and the engagement projection inserted from the open end of the vertical groove transitions to the lateral groove and gets over the click projection and engages with the lid. In the fitting structure, an elastic force imparting means is applied to the rib-like edge portion remaining between the L-shaped groove and the end portion of the fitting surface, and the end portion of the lateral groove of the L- shaped groove is used as the elastic force imparting means. wherein said that the formation of the narrow separation groove width than the length of the engaging projections between the end portion of the fitting surface Fitting structure between the container and the lid to be.

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