Hinge cap

Abstract

To provide a hinge cap capable of, when being lightened, preventing a lid body thereof from buckling and preventing shower water from being absorbed.SOLUTION: A hinge cap includes a cap body B mounted to a 1 of a container A and a lid D provided to the cap body B in a continuous manner via a hinge C. The cap body B includes a mounting portion 3 mounted to the mouth 1 of the container A and a lid engaging portion 11 provided upright from the mounting portion 3; the lid D includes a top wall 30, a side peripheral wall 31 provided vertically from the peripheral edge of the top wall 30, and a knob 38 provided so as to protrude from the lower part of the outer periphery of the side peripheral wall 31 on the side opposite to the hinge C; and the side peripheral wall 31 includes a locking projection 36 formed in the circumferential direction of the lower part of the inner periphery and engaged with the lid engaging portion 11, a buckling prevention projection 37 formed in the circumferential direction from above the locking projection 36 and brought into contact with or close to the upper surface of the lid engaging portion 11 when the lid is closed, and a circumferential lightening groove 40 recessed upward from the lower surface.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hinge cap that is attached to the mouth of a container, and more particularly to a hinge cap that is lightweight yet prevents shower water from being sucked into the cap. [Background technology]

[0002] In a hinge cap for filling a container with a heated liquid content for sterilization, after filling the liquid content and fitting the hinge cap to the mouth of the container, the container is conventionally washed with shower water from the outside and cooled. When a warm water shower is used to cool the filled liquid, the air inside the lid is heated by the heat of the liquid inside, so the air inside the lid cools and the internal pressure inside the lid drops, creating a pressure difference between the inside of the lid and atmospheric pressure, which causes shower water to be sucked into the lid through the gap, creating a hygiene problem.

[0003] For this reason, hinge caps have been known that are designed to maintain a secure seal even when the cap is attached to the mouth of a container to prevent shower water from entering the cap when cooling with a shower (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-246127 Summary of the Invention [Problem to be solved by the invention]

[0005] The hinge cap described in Patent Document 1 is designed so that when the cap body is fitted and fixed to the mouth of a container with the top lid closed on the cap body, the outer wall (15) tilts slightly inward, and the arc-shaped surface (15b) of the outer wall (15) and the inclined surface (26a) of the annular tongue piece (26) of the seal ring (25) are pressed together, preventing shower water from entering the cap. However, in the hinge cap described in Patent Document 1, the engaging protrusion (24) on the side wall (22) of the top cover (20) engages with the engaging protrusion (15a) on the outer wall (15) of the cap body (10), and in order to properly shape the engaging protrusion (24) during molding, it was necessary to ensure the thickness of the side wall (22) of the top cover (20). Therefore, in order to make the hinge cap lighter, it is necessary to make it thinner. However, if the thickness of the side wall (22) is made thinner, the hinge cap may buckle when it is fastened, or the shape of the engaging protrusion (24) may not be properly defined, resulting in inconsistent fitting force, and there is also the problem of it affecting the absorption of shower water.

[0006] The present invention aims to solve the above problems and to provide a hinge cap that, when made lighter, prevents the lid of the hinge cap from buckling and prevents the absorption of shower water. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a hinge cap comprising a cap body attached to the mouth of a container and a lid body connected to the cap body via a hinge portion, wherein the cap body has an attachment portion attached to the mouth of the container and a lid engagement portion erected from the attachment portion, and the lid body has a top wall, side walls erected from the peripheral edge of the top wall, and a knob portion protruding from the lower outer periphery of the side walls on the opposite side to the hinge portion, the hinge portion includes a central hinge and elastic pieces adjacent to or close to both sides of the hinge, or a central elastic piece and hinges adjacent to or close to both sides of the elastic piece; The side peripheral wall has a locking protrusion formed in the circumferential direction on the lower inner periphery and engaging with the lid engaging portion, and a buckling prevention protrusion formed in the circumferential direction from above the locking protrusion and abutting or coming close to the upper surface of the lid engaging portion when the lid is closed. The hinge portion extends from the center of the hinge portion to the circumferential direction on both sides of the side peripheral wall except for the area where the elastic piece is formed.a circumferential lightening groove recessed upward from the lower surface, It is also used as a separate hinge cap and attached to the mouth of the container. The hinge cap is comprised of a cap body attached to the mouth of a container and a lid body connected to the cap body via a hinge portion, and the cap body has an attachment portion attached to the mouth of a container and a lid engagement portion erected from the attachment portion, and the lid body has a top wall, side walls erected from the peripheral edge of the top wall, and a tab portion protruding from the side opposite the hinge portion at the bottom of the outer periphery of the side walls, and the hinge portion is comprised of a central hinge and elastic pieces adjacent or close to both sides of the hinge, or a central hinge. The side walls are provided with a locking protrusion formed circumferentially on the lower inner periphery that engages with the lid engaging portion, a buckling prevention protrusion formed circumferentially from above the locking protrusion that abuts or comes close to the upper surface of the lid engaging portion when the lid is closed, and circumferential lightening grooves that extend circumferentially on both sides from the side opposite the hinges, excluding the area where the knob is formed, and are recessed upward from the underside of the side walls excluding the area where the elastic piece is formed.

[0008] Specific embodiments of the hinge cap include: The recessed groove is a configuration characterized in that the recess is recessed upward at a height equal to the height of the upper end of the buckling prevention protrusion; and a configuration characterized in that the recess is a pouring-side recess recessed upward from the underside of the side peripheral wall at a height equal to the height of the lid engagement portion in the area where the knob is formed. Hire . [Effects of the Invention]

[0009] By adopting the above-described configuration, the hinge cap of the present invention can reduce the weight of the cap, and There is no risk of the hinge twisting when opening and closing the lid, and By providing a buckling prevention protrusion on the inside of the side peripheral wall of the lid, buckling of the lid when plugged can be prevented. Furthermore, when the hinge cap of the present invention is released from the mold, the locking protrusion on the inner periphery of the side wall is removed after the lightening groove is removed, so that the shape of the locking protrusion can be firmly established without forcible removal. Furthermore, the hinge cap of the present invention allows the lid engagement portion of the cap body and the locking protrusion of the lid body to be firmly engaged, so when the hinge cap is attached to a container filled with heated liquid contents and cooled with shower water, even if the pressure inside the cap is reduced, shower water can be prevented from being sucked into the cap. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a side cross-sectional view showing a closed state of a container equipped with a hinge cap according to a first embodiment of the present invention. [Figure 2] 1A and 1B are diagrams showing the hinge cap according to the first embodiment of the present invention in an open state, in which (a) is a top view and (b) is a side cross-sectional view. [Figure 3] 1A and 1B are diagrams showing a cap body of a hinge cap according to a first embodiment of the present invention, in which (a) is a bottom view of a main part, and (b) is a view of a main part as seen from the arrow XX in (a). [Figure 4] FIG. 10 is a cross-sectional side view showing a closed state of a container equipped with a hinge cap according to a second embodiment of the present invention. [Figure 5] 10A and 10B are diagrams showing a hinge cap according to a second embodiment of the present invention in an open state, in which (a) is a top view and (b) is a side cross-sectional view. [Figure 6] FIG. 10 is a cross-sectional side view showing a closed state of a container equipped with a hinge cap according to a third embodiment of the present invention. [Figure 7] 10A and 10B are diagrams showing a hinge cap according to a third embodiment of the present invention in an open state, in which (a) is a top view and (b) is a side cross-sectional view. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, the hinge cap of the present invention will be described with reference to the drawings showing an embodiment. In the following description, the left side in FIG. 1 is the "pouring side," the right side is the "rear side," the upper side is the "top," and the lower side is the "bottom." [Example]

[0012] In FIG. 1, A is a container, B is a cap body attached to the container A, and D is a lid body attached to the cap body B via a hinge part C so as to be able to open and close. The container A is deformable by squeezing and has a mouth 1 at the top, and a fitting ridge 2 is provided on the upper outer periphery of the mouth 1, and the upper outer periphery of the fitting ridge 2 forms an inclined surface 2a.

[0013] As shown in Figures 1 and 2, the cap body B comprises an attachment portion 3 that is fitted onto the mouth portion 1 of the container A, an upper wall 4 that extends inward from the inner edge of the attachment portion 3 and seals the opening of the mouth portion 1, a pouring outlet 4a that penetrates the upper wall 4, and a pouring tube 5 that is erected on the upper surface of the upper wall 4 with a diameter slightly wider than the pouring outlet 4a. The spout 4a opens from the center of the cap body B toward the pouring side. In order to make it easier to pour the liquid content, in this embodiment, the pouring side of the pouring tube 5 is formed higher than the back side, and the lip portion 5a is widened in a trumpet shape.

[0014] The mounting portion 3 is composed of an annular base wall portion 6 that abuts against the upper surface of the mouth portion 1 of the container A, an inner tube 7 that hangs down from the inner side of the base wall portion 6, and an outer wall portion 8 that hangs down from the outer side of the base wall portion 6, and the outer wall portion 8 has a hinge portion C connected to the upper end on the back side and an engaging protrusion 9 at the lower inner periphery that engages with the mating protrusion 2 of the mouth portion 1 of the container A. The base wall 6 has a lid engaging portion 11 erected at the top, and a locking protrusion 13 is provided around the outer periphery of the lid engaging portion 11.

[0015] At the top of the outer peripheral wall portion 8, on the pouring side, there is provided a stepped recess 15 recessed from the outer periphery in an arc shape over an arc range of approximately 180° to a depth of a distance α from above, and on the remaining back side, the upper surface 8a is flush with the upper surface of the upper wall 4, and a hinge portion C is connected to the upper end of the outer periphery. The step recess 15 is formed with a flat surface 15a that is a distance α below the top surface 8a, an inclined surface 15b that slopes upward and inward from the inner peripheral edge of the flat surface 15a, and inclined side surfaces 15c that slope from both sides of the end of the flat surface 15a toward both sides of the top surface 8a. On the pouring side of the outer peripheral wall portion 8, a notched recess 10 is recessed downward from the flat surface 15a of the stepped recess 15.

[0016] As shown in Figure 2(a), near the left side of the hinge part C when viewed from the hinge part C side, a peripheral notch 16 that is approximately V-shaped in a plan view is cut into the outer peripheral surface from the upper surface 8a, leaving a thin bottom wall 17 at the lower end. At a position corresponding to the outer circumferential notch 16 of the engaging projection 9 on the inner periphery of the outer circumferential wall 8, an inner circumferential notch (not shown) is cut vertically to form a vertical tear line. In addition, on the hinge portion C side of the outer peripheral wall portion 8, a slit groove 18 is recessed from above, starting from a position separated by the thin-walled portion at the top of the inner peripheral side of the outer peripheral notch portion 16, passing through the hinge portion C side and extending in an arc shape to near the center on the right side when viewed from the hinge portion C of the outer peripheral wall portion 8, so that the starting point of the slit groove 18 adjacent to the vertical tear line can be used as the tearing starting point, and the inner side of the bottom surface of the slit groove 18 can be used as the circumferential tear line to tear.

[0017] In this embodiment, by pulling the lid body D, the vertical tear line and circumferential tear line of the outer wall portion 8 are torn via the hinge portion C, disengaging the attachment portion 3 of the cap body B attached to the mouth portion 1 of the container A, thereby forming a separation mechanism for separating the cap body B from the container A. The separation mechanism may be based on another method or may not be present.

[0018] As shown in FIG. 1, the flow straightening cylinder 20 extends downward in a cylindrical shape with a slightly reduced diameter from the pouring outlet 4a of the upper wall 4, and is disposed coaxially with the pouring outlet 4a. The bottom wall 23 of the flow straightening cylinder 20 slopes downward from the side opposite the horizontal hole 22 toward the horizontal hole 22, across the axis of the flow straightening cylinder 20. The upper surface 23a of the bottom wall 23 forms an inclined surface that slopes downward from the pouring side toward the back side.

[0019] A horizontal hole 22 is formed in the peripheral wall 21 of the flow straightening cylinder 20, and the horizontal hole 22 penetrates the peripheral wall 21 and opens from the flow straightening cylinder 20 toward the rear side. The horizontal hole 22 is disposed over the entire length of the peripheral wall 21 in the vertical direction, and the portion of the lower edge of the horizontal hole 22 located on the pouring side is continuous with the upper surface 23 a of the bottom wall 23 of the flow straightening cylinder 20 . As shown in FIG. 3(b), the shape of the lateral hole 22 in a front view is rectangular, and the shape of the lateral hole 22 in a front view is the shape of the lateral hole 22 when viewed from the X direction in which the lateral hole 22 opens.

[0020] The hanging tube 25 is arranged next to the rear side of the flow straightening tube 20, and extends downward from the upper wall 4. As shown in FIG. 3(a), the hanging tube 25 has a larger diameter than the flow straightening tube 20. The axis of the hanging tube 25 is positioned closer to the pouring side than the center of the cap body B, and the vertical length of the hanging tube 25 is longer than the vertical length of the straightening tube 20, so that the lower end of the hanging tube 25 is located lower than the lower end of the straightening tube 20.

[0021] The interior of hanging cylinder 25 communicates with horizontal hole 22 , and a part of hanging cylinder 25 located on the pouring side is integrated with flow straightening cylinder 20 , and horizontal hole 22 opens into hanging cylinder 25 . The hanging tube 25 does not have a bottom and opens downward. The hanging tube 25 is provided with a notch 26 that opens to the rear side, and the notch 26 cuts out the lower end of the hanging tube 25, and the notch 26 becomes larger in the vertical direction from the pouring side toward the rear side.

[0022] As shown in FIG. 2(a), the hinge portion C is composed of a central hinge 28 and elastic pieces 29 adjacent to both sides of the hinge 28. In this embodiment, the hinge portion C is formed so that the hinge 28 and the elastic piece 29 are continuous, but the hinge 28 and the elastic piece 29 may be formed with a gap between them (close to each other). Furthermore, the hinge portion C may be composed of a central elastic piece 29 and hinges 28 adjacent to or close to both sides of the elastic piece 29 .

[0023] As shown in Figures 1 and 2, the lid body D is rotatably attached to the upper outer end of the outer wall portion 8 of the cap body B via a hinge portion C, and is provided with a top wall 30, a side wall 31 hanging down from the periphery of the top wall 30, and a sealing tube 32 hanging down from the back surface of the top wall 30 and sealing the dispensing tube 5. The top wall 30 is provided with a thin, deformable portion 33 on the outer periphery of the sealing cylinder 32 .

[0024] The sealing cylinder 32 has a normal sealing portion a that is inserted into the inner surface of the pouring cylinder 5 when the lid is closed to create a sealed state, and is provided with a lower sealing cylinder 32a whose diameter is reduced on the lower outer periphery of the sealing cylinder 32. The lower sealing cylinder 32a is formed so that when the lid is closed, it is close to or abuts the inner surface of the pouring outlet 4a in the upper wall 4, and another temporary sealing portion b is formed below the sealing portion a between the lower sealing cylinder 32a and the inner surface of the pouring outlet 4a.

[0025] The hinge cap is sealed with two seals, the seal part a and the temporary seal part b, so even if one seal part comes off due to an impact, the other seal part will seal and the contents will not leak. In addition, a space c is provided between the sealed portion a and the temporary sealed portion b, so that when a small amount of liquid contents enters the temporary sealed portion b due to an impact such as when the container A is dropped, the liquid contents can be contained in the space c.

[0026] An engaged portion 35 is provided around the inner periphery of the lower end of the side peripheral wall 31, which engages with the lid engaging portion 11 to maintain the lid in a closed state. The engaged portion 35 has a locking projection 36 on its inward surface that engages with the locking projection 13 of the lid engaging portion 11 . In addition, a buckling prevention protrusion 37 is provided above the engaged portion 35 of the side wall 31 and protrudes inward, which comes into close proximity to or abuts against the upper surface of the lid engaging portion 11 when the lid is closed, and prevents the side wall 31 from buckling when the hinge cap is inserted. In this embodiment, as shown in Figure 2(a), the buckling prevention protrusion 37 is formed by dividing it into three parts by providing three intermittent portions on the inner circumference of the side wall 31, and as shown in Figure 1, the upper end of the buckling prevention protrusion 37 is formed by gently descending inward from the side wall 31 near the middle between the upper end of the engaged portion 35 and the top wall 30, and the lower end of the buckling prevention protrusion 37 is formed with a flat downward surface 37a so that it is close to or lightly abuts the upper surface of the lid engagement portion 11. The buckling prevention protrusion 37 may be formed on the entire inner periphery of the side peripheral wall 31, or may be divided into a plurality of parts with intermittent portions provided therebetween.

[0027] A knob 38 having an arc shape in the circumferential direction is formed on the outer periphery of the side wall 31 at the lower part on the pouring side, and a hinge C is connected to the lower end on the back side. An arc-shaped covering wall 39 is vertically attached to the outer peripheral edge of the pouring side of the underside of the side peripheral wall 31, except for the part where the knob portion 38 is formed, and its lower end is formed so as to be close to or abut the flat surface 15a of the stepped recess 15 so as to cover the stepped recess 15 of the outer peripheral wall portion 8 of the cap body B when the lid is closed.

[0028] As shown in Figure 2(a), the underside of the peripheral side wall 31 is formed with a lightening groove 40 that extends circumferentially on both sides from the center of the pouring side, excluding the arc-shaped range θ1 to which the elastic pieces 29 of the hinge portion C are connected, and that forms a space recessed upward at a height h1 equivalent to the height of the upper end of the buckling prevention protrusion 37, as shown in Figure 1, and a deformable engaging tube 41 is formed between the lightening groove 40 of the peripheral side wall 31 and the engaged portion 35. Furthermore, because the lightening groove 40 is not formed in the arc-shaped range θ1 to which the elastic pieces 29 of the hinge portion C are connected, there is no risk of the hinge portion C twisting when the lid D is opened or closed, resulting in good usability.

[0029] In order to prevent unauthorized opening of the hinge cap of this embodiment before use, a shrink label or sealing member, etc., may be provided between the cap body B and the lid body D, although this is not shown.

[0030] Next, the manner of use and the effects of this embodiment will be described. The hinge cap of this embodiment is integrally molded in the open state shown in FIG. In the integral molding of the hinge cap, when the mold is released, the locking projection 36 of the engagement cylinder 41 which is the inner peripheral part of the side peripheral wall 31 is removed after the lightening groove 40 is removed, so that the shape of the locking projection 36 can be firmly formed without forcible removal.

[0031] The integrally molded hinge cap rotates the lid body D via the hinge portion C, covers the cap body B, and closes the lid. At this time, the outer peripheral surface of the lower part of the sealing tube 32 of the lid body D comes into close contact with the inner peripheral surface of the lower part of the dispensing tube 5 of the cap body B to form a seal part a. Furthermore, the engaged portion 35 of the side peripheral wall 31 of the lid body D and the lid engaging portion 11 of the cap body B are engaged, maintaining the lid closed.

[0032] Next, as shown in FIG. 1, the closed hinge cap is attached to the mouth 1 of the container A filled with the liquid content. In the stoppering process, the mouth 1 of the container A is placed in the annular groove formed between the inner tube 7 and outer wall 8 of the attachment portion 3, and a pressing force is applied from above the lid body D, causing the engaging protrusion 9 of the outer wall 8 to overcome the mating protrusion 2 of the mouth 1 and engage, so that the mouth 1 of the container A is clamped between the outer periphery of the inner tube 7, the inner periphery of the outer wall 8, and the base wall 6, thereby attaching the container.

[0033] When the cap is capped, the cap body D is pressed hard, which causes the engaging tube 41 to expand outward and become prone to deformation. However, the downward surface 37a of the anti-buckling protrusion 37 abuts against the upper surface of the cap engaging portion 11, preventing the engaging tube 41 from expanding outward and preventing the hinge cap from buckling.

[0034] When the hinge cap of this embodiment is applied to a container A filled with hot liquid, the pressure inside the container A rises. However, since the top wall 30 has a deformable thin-walled portion 33 formed on the outside of the sealing tube 32, only the inner side of the thin-walled portion 33 of the top wall 30 rises, releasing the pressure outside the dispensing tube 5. This does not interfere with the engagement between the engaging portion 35 of the side wall 31 of the lid body D and the lid engaging portion 11 of the cap body B, and the lid is maintained closed, preventing the lid body D from opening due to an increase in internal pressure when the liquid is hot. After that, the container A is washed with shower water from the outside and cooled.

[0035] Furthermore, even if an impact force is applied to the top wall 30 of the lid body D when the container is dropped upside down in the closed state, the thin-walled portion 33 absorbs the impact received by the lid body D and the sealing tube 32 is not pushed into or pulled away from the dispensing tube 5, so that the tight contact between the sealing tube 32 and the dispensing tube 5 of the cap body B is not affected, and the sealing tube 32 and the dispensing tube 5 are prevented from coming loose and from damaging each other.

[0036] When using the liquid contents in container A, by placing a finger on knob 38 of lid body D and lifting it, the side wall 31 on the pouring side is lifted and the engaging tube 41 is deformed from the bottom toward the space of the lightening groove 40, making it easier for the engaging protrusion 36 at that part to disengage from the engaging protrusion 13 of the lid engaging part 11, thereby reducing the force required to disengage. When the knob 38 is further lifted, the seal a between the sealing tube 32 of the lid body D and the dispensing tube 5 of the cap body B is released, and the lid body D is opened.

[0037] When the container A is squeezed and deformed with the lid body D open, the liquid content in the container A passes through the inside of the hanging tube 25, the horizontal hole 22 of the straightening tube 20, and the inside of the straightening tube 20 to reach the outlet 4a, and is then poured out of the pouring tube 5 through the outlet 4a. During this process, the liquid content passes through the horizontal hole 22 of the flow straightening cylinder 20, causing it to flow in a direction that intersects the vertical direction once, but then passes through the inside of the flow straightening cylinder 20, whereby the flow is straightened in the vertical direction. Moreover, in this embodiment, the liquid content in container A passes through the hanging tube 25 before reaching the horizontal hole 22 of the flow straightening tube 20. Therefore, even if container A is strongly squeezed and deformed, for example, the flow of the liquid content is prevented from being disturbed, which makes it easier to pour the liquid content in the desired direction.

[0038] By closing the lid body D again on the cap body B, the outer periphery of the sealing tube 32 of the lid body D adheres closely to the inner periphery of the dispensing tube 5 of the cap body B to form a seal, thereby sealing the inside of the container A, and the hinge cap can be used by repeatedly opening and closing the lid body D. The hinge cap of this embodiment has a stepped recess 15 formed with a flat surface 15a and an inclined surface 15b on the pouring side of the outer wall portion 8 of the cap body B. Therefore, even if the liquid drips from the lip portion 5a of the pouring tube 5 into the lower stepped recess 15 when the container A is tilted during use, the inclination of the inclined surface 15b will cause the liquid to flow from the flat surface 15a into the cutout recess 10, so that the dirt can be easily wiped off with tissue or the like.

[0039] Next, a mode in which the hinge cap is separately disposed of after the liquid content in the container A has been used up will be described. In this case, the hinge cap is opened, and the lid body D is grasped with the fingers and pulled outward, tearing the vertical tear line and circumferential tear line of the outer wall portion 8 through the hinge portion C, disengaging the attachment portion 3 of the cap body B attached to the mouth portion 1 of the container A, and the cap body B can be separated from the container A. [Example]

[0040] Next, a second embodiment in which the shape of the lid D is modified will be described with reference to the drawings. In the following, the same components as those in the first embodiment are given the same reference numerals, and new reference numerals are given to changed components, and the explanation will focus on the differences.

[0041] In FIG. 4, A is a container, B is a cap body attached to the container A, and Da is a lid body attached to the cap body B via a hinge part C so as to be able to open and close. As shown in Figures 4 and 5, the lid body Da is rotatably attached to the upper outer end of the outer wall portion 8 of the cap body B via a hinge portion C, and is provided with a top wall 30, a side wall 31 hanging down from the peripheral edge of the top wall 30, and a sealing tube 32 hanging down from the back surface of the top wall 30 to seal the dispensing tube 5.

[0042] As shown in Figure 5(a), on the underside of the side peripheral wall 31, except for the arc-shaped range θ2 where the knob portion 38 is formed, a lightening groove 40 is formed which extends circumferentially on both sides from the pouring side and forms a space recessed upward at a height h1 equivalent to the height of the upper end of the buckling prevention protrusion 37, except for the arc-shaped range θ1 where the elastic piece 29 of the hinge portion C is connected, as shown in Figure 4, and a deformable engaging tube 41 is formed between the lightening groove 40 of the side peripheral wall 31 and the engaged portion 35.

[0043] Next, the manner of use and the effects of this embodiment will be described. In the hinge cap of this embodiment, a lightening groove 40 is provided on the underside of the side peripheral wall 31 of the lid body Da so as to exclude the arc range θ2 in which the knob 38 is formed, so that when the knob 38 of the lid body D is lifted to use the liquid contained in the container A, the side peripheral wall 31 on the pouring side is lifted, but since there is no lightening groove 40 in this part, it is less likely to deform, and the force required to disengage the locking protrusion 36 from the locking ridge 13 of the lid engagement part 11 is greater than in the first embodiment. However, the buckling prevention effect is greater than in the first embodiment. Other functions and effects are the same as those of the first embodiment. [Example]

[0044] Next, a third embodiment in which the shape of the lid D is modified will be described with reference to the drawings. In the following, the same components as those in the first embodiment are given the same reference numerals, and new reference numerals are given to changed components, and the explanation will focus on the differences.

[0045] In FIG. 6, A is a container, B is a cap body attached to the container A, and Db is a lid body attached to the cap body B via a hinge part C so as to be able to open and close. As shown in Figures 6 and 7, the lid body Db is rotatably attached to the upper outer end of the outer wall portion 8 of the cap body B via a hinge portion C, and is provided with a top wall 30, a side wall 31 hanging down from the peripheral edge of the top wall 30, and a sealing tube 32 hanging down from the back surface of the top wall 30 to seal the dispensing tube 5.

[0046] As shown in Figure 7(a), on the underside of side peripheral wall 31, except for arc-shaped range θ1 where elastic pieces 29 of hinge portion C are connected, lightening grooves 40 and dispensing-side lightening grooves 42 of different heights are formed, as shown in Figure 6, extending circumferentially from the center of the dispensing side. Lightening grooves 40 are recessed upward at a height h1 equivalent to the height of the upper end of anti-buckling protrusion 37, except for arc-shaped range θ2 where knob portion 38 is formed, to form a space, and dispensing-side lightening groove 42 is recessed upward at a height h2 equivalent to the height of lid engaging portion 11 in arc-shaped range θ2 where knob portion 38 is formed, to form a space, and a deformable engaging tube 41 is formed between side peripheral wall 31 lightening grooves 40 and dispensing-side lightening groove 42 and engaged portion 35. Since the pouring side recessed groove 42 has a height h2 equal to the height of the lid engagement portion 11, the buckling prevention effect is greater than in the first embodiment, and the structure makes it easier to open the lid body Db than in the second embodiment.

[0047] Next, the manner of use and the effects of this embodiment will be described. In the hinge cap of this embodiment, a dispensing-side recessed groove 42 is provided on the underside of the side wall 31 of the lid body Db in the arc range θ2 where the gripping portion 38 is formed. Therefore, when the contents of the container A are used, by lifting the gripping portion 38 of the lid body D, the dispensing-side side wall 31 is lifted and the engaging tube 41 is deformed from the bottom toward the space of the dispensing-side recessed groove 42, making it easier for the engaging protrusion 36 in this part to disengage from the engaging protrusion 13 of the lid engaging portion 11, and therefore the force for disengaging can be applied between the first and second embodiments. Other functions and effects are the same as those of the first embodiment. [Industrial Applicability]

[0048] The hinge cap of the present invention can be made lightweight, and even though it is a lightweight hinge cap, it will not buckle.Furthermore, when it is attached to a container filled with heated liquid contents and cooled with shower water, even if the pressure inside the cap is reduced, the shower water will not be sucked into the cap, making it easy to maintain hygiene, and it is suitable as a hinge cap to be fitted onto the mouth of a food container. [Explanation of symbols]

[0049] A container B Cap body C Hinge part D, Da, Db lid body a Seal part b Temporary seal c space h1, h2 height α distance θ1, θ2 arc range 1 Mouth 2 Mating ridges 2a Slope 3. Mounting part 4 Upper wall 4a spout 5 Pour tube 5a Lip 6 Base wall part 7 Inner cylinder 8 Outer wall 8a, 23a top surface 9 Engagement protrusion 10. Notched recess 11 Lid engagement part 13 Locking ridge 15 Step recess 15a flat surface 15b Slope 15c sloped side 16 Peripheral notch 17 Thin bottom wall 18 Slit groove 20 Rectifier tube 21 Peripheral wall 22 Horizontal cave 23 Bottom wall 25 Hanging tube 26 Notch 28 Hinge 29 Elastic piece 30 Top Wall 31 Side wall 32 Closed Envelope 32a Lower seal tube 33 Thin-walled section 35 Engaged part 36 Locking protrusion 37 Buckling prevention protrusion 37a Downward Face 38 Knob 39 Covered wall 40 Lightening groove 41 Engagement tube 42 Outlet side lightening groove

Claims

1. A hinge cap comprising a cap body attached to the mouth of a container and a lid body connected to the cap body via a hinge portion, The cap body includes an attachment portion that is attached to the mouth of the container, and a lid engagement portion that stands upright from the attachment portion; The lid body includes a top wall, a side wall extending downward from the peripheral edge of the top wall, and a knob protruding from the lower outer periphery of the side wall on the opposite side to the hinge portion, the hinge portion includes a central hinge and elastic pieces adjacent to or close to both sides of the hinge, or a central elastic piece and hinges adjacent to or close to both sides of the elastic piece; The side wall has a locking protrusion formed circumferentially on the lower inner periphery that engages with the lid engagement portion, a buckling prevention protrusion formed circumferentially from above the locking protrusion that abuts or comes close to the upper surface of the lid engagement portion when the lid is closed, and a circumferential lightening groove extending circumferentially on both sides from the center opposite the hinge portion and recessed upward from the underside of the side wall excluding the area where the elastic piece is formed.

2. A hinge cap comprising a cap body attached to the mouth of a container and a lid body connected to the cap body via a hinge portion, The cap body includes an attachment portion that is attached to the mouth of the container, and a lid engagement portion that stands upright from the attachment portion; The lid body includes a top wall, a side wall extending downward from the peripheral edge of the top wall, and a knob protruding from the lower outer periphery of the side wall on the opposite side to the hinge portion, the hinge portion includes a central hinge and elastic pieces adjacent to or close to both sides of the hinge, or a central elastic piece and hinges adjacent to or close to both sides of the elastic piece; The side walls are provided with a locking protrusion formed circumferentially on the lower inner periphery and engaging with the lid engaging portion, a buckling prevention protrusion formed circumferentially from above the locking protrusion and abutting or coming close to the upper surface of the lid engaging portion when the lid is closed, and a circumferential lightening groove extending circumferentially on both sides from the opposite side of the hinge, excluding the area where the knob portion is formed, and recessed upward from the underside of the side walls excluding the area where the elastic piece is formed.

3. 3. The hinge cap according to claim 1, wherein the recessed groove is recessed upward at a height equal to the height of the upper end of the buckling prevention protrusion.

4. A hinge cap as described in claim 1 or 3, characterized in that the recessed groove is a pouring-side recessed groove that is recessed upward from the underside of the side wall at a height equal to the height of the lid engagement portion in the area where the knob portion is formed.

Images