阅读说明：本技术 具有安全结构的扭断式旋开盖 (Twist-off type unscrewing cap with safety structure ) 是由 翟银星 骆轶 傅一飞 于 2018-06-19 设计创作，主要内容包括：本发明公开了一种具有安全结构的扭断式旋开盖,包括盖顶及圆筒状盖壁,盖顶上形成有凹坑,凹坑的底面向上拱起形成安全钮,盖壁的下部设有两条凸环,两条凸环之间构成环形凹槽,环形凹槽的槽底处沿盖壁周向设有若干条U型切缝,所述U型切缝上侧的盖壁向内倾斜形成贯通盖壁的冲压口,相邻冲压口之间的盖壁构成架桥,冲压口下方的盖壁构成防盗环,防盗环通过所述架桥与冲压口上方的盖壁连接。本发明有效地解决了现有技术的旋开盖缺少产品质量安全性提醒功能及现有技术的旋开盖在开盖过程中操作者容易受伤的问题,大大提高了旋开盖在使用过程中的安全性,具有很高的实用价值。(The invention discloses a twist-off type unscrewing cap with a safety structure, which comprises a cap top and a cylindrical cap wall, wherein a pit is formed on the cap top, the bottom surface of the pit is arched upwards to form a safety button, two convex rings are arranged at the lower part of the cap wall, an annular groove is formed between the two convex rings, a plurality of U-shaped cutting seams are arranged at the groove bottom of the annular groove along the circumferential direction of the cap wall, the cap wall at the upper side of each U-shaped cutting seam is inclined inwards to form a stamping opening penetrating through the cap wall, the cap wall between the adjacent stamping openings forms a bridging, the cap wall below the stamping opening forms an anti-theft ring, and the anti-theft ring is connected with the cap wall above the stamping opening through the bridging. The invention effectively solves the problems that the unscrewing cap in the prior art lacks a product quality safety reminding function and an operator is easy to be injured in the process of opening the cap, greatly improves the safety of the unscrewing cap in the using process and has very high practical value.)

1. A twist-off type screw-off cap with a safety structure for sealing a mouth portion of a container, the screw-on cap comprises a cap top (1) and a cylindrical cap wall (2) formed by downward extension of the outer edge of the cap top, the lower surface of the cover top is provided with a sealing gasket (4), a pit (23) is formed on the cover top, the bottom surface of the pit is arched upwards to form a safety button (24), the lower part of the cover wall is provided with two convex rings (18) which are parallel to each other and surround the cover wall, an annular groove (19) is formed between the two convex rings, a plurality of U-shaped cutting seams (20) are arranged at the groove bottom of the annular groove along the circumferential direction of the cover wall, the cover wall on the upper side of the U-shaped cutting seam inclines inwards to form a stamping opening (21) penetrating through the cover wall, the cover wall between adjacent stamping openings forms a bridge (17), the cover wall below the stamping opening forms an anti-theft ring (3), and the anti-theft ring is connected with the cover wall above the stamping opening through the bridge.

2. The twist-off lid with safety structure as claimed in claim 1, wherein the recess and the safety button are both circular, the diameter of the safety button is 10 mm to 35 mm, and the height of the arch of the safety button is 0.3 mm to 1 mm and lower than the depth of the recess; the number of the U-shaped cutting seams is 6-12, and the U-shaped cutting seams are uniformly arranged on the peripheral surface of the unscrewing cover.

3. The twist-off type unscrewing cap with a safety structure as claimed in claim 1, wherein the bridge is provided with a notch (22), the notch is arranged along the circumferential direction of the outer periphery of the cap wall, the number of the notches on the bridge is one, the cross section of the notch is triangular, the bottom side of the triangular is flush with the lower side of the punching opening, the maximum depth of the notch is 40% to 60% of the thickness of the cap wall, and the width of the notch is 0.7 to 1.3 times of the depth of the notch.

4. The twist-off type unscrewing cap with a safety structure as claimed in claim 1, characterized in that an inner sealing ring (6) for abutting against the inner wall of the container mouth (5) and an outer sealing ring (7) for abutting against the outer wall of the container mouth are integrally extended downward from the outer peripheral portion of the sealing gasket, and a sealing groove (8) with a downward opening is formed between the inner sealing ring and the outer sealing ring.

5. The twist-off type unscrewing cap with the safety structure as claimed in claim 4, wherein a material containing groove (9) is arranged on the top surface of the sealing gasket corresponding to the upper and lower parts of the sealing groove, the bottom surface of the material containing groove is arc-shaped, the center line of the cross section of the material containing groove coincides with the center line of the cross section of the sealing groove, the opening width of the material containing groove is 55% to 75% of the width of the sealing groove, and the depth of the material containing groove is 35% to 65% of the opening width of the material containing groove; when the cover is screwed to seal the container opening, the inner side surface of the outer sealing ring is tightly attached to the outer wall of the container opening, the outer side surface of the inner sealing ring is tightly attached to the inner wall of the container opening, the groove bottom of the sealing groove is tightly attached to the upper edge of the opening of the container, the cross-sectional area of the container groove is reduced, and the groove bottom of the container groove is close to the lower surface of the cover.

6. The twist-off type unscrewing cap with a safety structure as claimed in claim 4, wherein the height of the cross section of the inner sealing ring is greater than that of the cross section of the outer sealing ring, an interference ring (10) is convexly provided on the lower portion of the outer side surface of the inner sealing ring, and the distance between the interference ring and the bottom of the sealing groove is greater than the axial moving distance of the cap top when the opening bridge of the unscrewing cap is broken.

7. The twist-off type unscrewing cap with a safety structure as claimed in claim 1, wherein a cap wall close to the cap top is formed with an annular tapered wall (11) with a small upper part and a large lower part, the upper section of the tapered wall clings to the outer sealing ring to form an outer sealing ring squeezing part (12), when the cap is unscrewed to close the container mouth, the pressure of the outer sealing ring on the outer wall of the container mouth is greater than that of the inner sealing ring on the inner wall of the container mouth, and the apex angle of the tapered wall is 26-49 degrees; the number of the U-shaped cutting seams is 6-12, and the U-shaped cutting seams are uniformly arranged on the peripheral surface of the unscrewing cover.

8. The twist-off unscrewing cap with safety structure as claimed in claim 7, characterized in that the inner side surface of the inner sealing ring and the lower surface of the sealing gasket are transitionally connected by a compression-resistant arc surface (13), the radius of which is 0.7 to 1.3 times the height of the cross-section of the inner sealing ring; the lower part of the annular conical wall is provided with a plurality of internal pressure release ports (16) which are punched inwards along the circumferential direction of the cover wall, and the cover wall at the lower side edge of the internal pressure release ports is bent inwards to form an inwards inclined plane structure.

9. The twist-off type screw-on cap with safety structure according to claim 8, wherein a decompression groove (14) extending along the sealing groove is provided on the groove bottom of the sealing groove on the side close to the inner sealing ring, the opening width of the decompression groove is 11% to 24% of the width of the groove bottom of the sealing groove, and the depth of the decompression groove is 16% to 29% of the width of the groove bottom of the sealing groove; the center line of the cross section of the pressure reducing groove is parallel to the center line of the cross section of the sealing groove, the inner side groove wall of the pressure reducing groove and the inner side groove wall at the groove bottom of the sealing groove are on the same cylindrical surface, and the groove bottom of the pressure reducing groove is arc-shaped.

10. The twist-off unscrewing cap with safety feature as claimed in claim 4, characterized in that the lower end of the outer side of the inner sealing ring is provided with a guiding arc-shaped edge (15), the upper edge of which is connected with the lower edge of the interference ring.

Technical Field

The invention relates to the technical field of packaging containers, in particular to a twist-off type unscrewing cap with a safety structure.

Background

Disclosure of Invention

The invention aims to solve the problems that the unscrewing cap in the prior art lacks a product safety reminding function and an operator is easy to hurt in the cap opening process, and provides the twist-off type unscrewing cap with the safety structure, which can remind a consumer of safety and greatly improve the safety of the unscrewing cap in the using process.

Another object of the present invention is to provide a twist-off type unscrewing cap with a safety structure, which can greatly reduce the problems of container collapse, container neck deformation of the anti-theft ring, etc. caused by the unscrewing cap during the capping process, so as to solve the problems of container collapse, container neck deformation of the anti-theft ring, etc. caused by the excessive capping pressure during the capping process of the unscrewing cap in the prior art.

The third purpose of the invention is to solve the problem that the sealing performance of the unscrewing cap in the prior art is easy to be poor, so that the quality guarantee period of the product is greatly shortened, and provide the twist-off unscrewing cap with a safety structure, which has the characteristics of simple structure, good sealing performance and convenience in opening.

The twist-off type unscrewing cap with the safety structure is used for sealing the opening of a container, and comprises a cap top and a cylindrical cap wall formed by downward extending of the outer edge of the cap top, a sealing gasket is arranged on the lower surface of the cap top, a pit is formed in the cap top, the bottom surface of the pit is upwards arched to form a safety button, two convex rings which are parallel to each other and surround the cap wall are arranged on the lower portion of the cap wall, an annular groove is formed between the two convex rings, a plurality of U-shaped cutting seams are arranged at the groove bottom of the annular groove along the circumferential direction of the cap wall, the cap wall on the upper side of each U-shaped cutting seam is inwards inclined to form a stamping opening penetrating through the cap wall, the cap wall between every two adjacent stamping openings forms a bridge, the cap wall below each stamping opening forms an anti-theft ring, and the anti-theft ring is connected with the cap wall above each stamping opening through the bridge. The top of the unscrewing cover is provided with a pit, the bottom of the pit is provided with an upward arc-shaped arch structure, the arch structure can be sunken to form a downward concave surface under the action of external atmospheric pressure when negative pressure is generated inside the product after the product is vacuumized or the product is subjected to heat packaging and cooling, and the concave surface is always present in the shelf life of the product. When the sealing failure of the container causes the air to flow into the container or the food in the container is deteriorated to generate gas, so that the internal air pressure and the external air pressure are the same or the internal air pressure is greater than the external atmospheric pressure, the arch structure can be bounced to restore to the original state to form the structural characteristic that the safety button is arched upwards, at the moment, a consumer is reminded to pay attention, the commodity possibly has the quality safety problem and is not suitable for being purchased or eaten. On the other hand, two convex rings which are parallel to each other and surround the cover wall are arranged between the upper part of the unscrewing cover and the anti-theft ring, an annular groove is formed between the two convex rings, and the cutting seams for separating the anti-theft ring and the bridging bridges between the adjacent cutting seams are arranged at the groove bottom of the annular groove, so that the cutting seams and the bridging bridges are both positioned at the concave parts of the groove and are not easy to contact with the palm of an operator when the unscrewing cover is rotated, and the palm can be prevented from being injured by sharp pricks after the anti-theft ring is broken (namely the bridging bridges are broken). Meanwhile, the cover wall on the upper side of the U-shaped cutting seam is inclined inwards to form a punching opening (used for replacing a notch in the traditional process) penetrating through the cover wall, so that a spike formed when the bridging is broken can be extruded by the cover wall on the upper side of the U-shaped cutting seam when the unscrewing cover rotates, and the spike loses the sharpness to a certain extent (or the direction of the spike is consistent with the rotating direction through extrusion), so that the possibility of damaging the palm of an operator is greatly reduced. Therefore, the problem that an operator is easily injured in the process of opening the cover of the unscrewing cover in the prior art is solved, and the safety of the unscrewing cover in the using process is greatly improved.

Preferably, the concave pit and the safety button are both circular, the diameter of the safety button is 10 mm to 35 mm, and the arching height of the safety button is 0.3 mm to 1 mm and is lower than the depth of the concave pit; the number of the U-shaped cutting seams is 6-12, and the U-shaped cutting seams are uniformly arranged on the peripheral surface of the unscrewing cover.

Preferably, the bridge is provided with a notch, the notch is arranged along the circumferential direction of the periphery of the cover wall, the notch on the bridge is a single notch, the cross section of the notch is triangular, the bottom edge of the triangle is flush with the lower side edge of the punching opening, the maximum depth of the notch is 40-60% of the thickness of the cover wall, and the width of the notch is 0.7-1.3 times of the depth of the notch. The notch is formed by removing a part of cover wall materials in a cutting mode, and is different from a notch pressing structure formed by extrusion and the like, on one hand, the existence of the notch enables the wall thickness of a bridge to be locally thinned and the structural strength to be reduced, on the other hand, the stress at the notch is concentrated when the unscrewing cover is opened, so that the opening force of the unscrewing cover can be greatly reduced, and the purpose of opening is facilitated. The bottom edge of the triangular notch groove is flush with the lower side edge of the stamping opening, so that the outer edge of the lower side edge of the stamping opening after the bridge is broken is a complete circle after the cover is rotated and unscrewed, namely the round outer edge has no sharp prick, and the palm can be prevented from being injured by the sharp prick after the bridge is broken to the maximum extent.

Preferably, an inner seal ring for abutting against an inner wall of the container mouth and an outer seal ring for abutting against an outer wall of the container mouth are integrally extended downward from an outer peripheral portion of the gasket, and a seal groove with a downward opening is formed between the inner seal ring and the outer seal ring. The inner side surface of the outer sealing ring (namely the outer side groove wall of the sealing groove) is tightly attached to the outer wall of the container opening to form outer sealing, the outer side surface of the inner sealing ring (namely the inner side groove wall of the sealing groove) is tightly attached to the inner wall of the container opening to form inner sealing, and the groove bottom of the sealing groove is tightly attached to the upper edge of the container opening to form upper sealing, so that the container is well sealed by screwing the cover.

Preferably, the top surface of the sealing gasket vertically corresponding to the sealing groove is provided with a material containing groove, the bottom surface of the material containing groove is arc-shaped, the central line of the cross section of the material containing groove is superposed with the central line of the cross section of the sealing groove, the opening width of the material containing groove is 55-75% of the width of the sealing groove, and the depth of the material containing groove is 35-65% of the opening width of the material containing groove; when the cover is screwed to seal the container opening, the inner side surface of the outer sealing ring is tightly attached to the outer wall of the container opening, the outer side surface of the inner sealing ring is tightly attached to the inner wall of the container opening, the groove bottom of the sealing groove is tightly attached to the upper edge of the opening of the container, the cross-sectional area of the container groove is reduced, and the groove bottom of the container groove is close to the lower surface of the cover. According to the invention, the material containing groove is arranged on the top surface of the sealing gasket above the sealing groove, and is arranged on the surface, which is contacted with the cover top, of the sealing gasket, when the cover is unscrewed to cover the container opening, downward pressure is generated when the cover is covered by the cover top, and the sealing gasket interferes to generate a reaction force, and part of the reaction force can be deformed and absorbed by the material containing groove, so that the reaction force can not be completely acted on the container, the pressure bearing of the container is greatly reduced, and the problems of container collapse, container anti-theft ring neck deformation and the like caused in the cover closing process of the unscrewing cover are greatly reduced.

Preferably, the height of the cross section of the inner sealing ring is greater than that of the cross section of the outer sealing ring (namely, the downward extension length of the inner sealing ring is greater than that of the outer sealing ring), an interference ring is convexly arranged at the lower part of the outer side surface of the inner sealing ring, and the distance between the interference ring and the bottom of the sealing groove is greater than the axial moving distance of the cap top when the unscrewing cap opening bridge is broken. The invention is characterized in that the lower part of the outer side surface of the inner sealing ring is convexly provided with an interference ring, the interference ring is an annular belt structure which is protruded on the outer side surface of the inner sealing ring, the interference ring can play a role of strengthening sealing when the outer side surface of the inner sealing ring is tightly attached to the inner wall of the container opening, because the distance between the interference ring and the bottom of the sealing groove is larger than the axial moving distance of the cover top when the anti-theft ring is opened by unscrewing the cover, namely, in the initial stage of the rotary opening of the unscrewing cover, when the unscrewing cover moves a certain distance in the axial direction but the anti-theft ring is not broken, the interference ring is always tightly attached to the inner wall of the container opening, the sealing between the inner sealing ring and the inner wall of the container opening before the anti-theft ring is broken is ensured, thus, the rotary opening cover can be prevented from rotating (or loosening) to a, leading to poor sealability and greatly shortened shelf life of the product.

Preferably, an annular tapered wall with a small upper part and a large lower part is formed on the cover wall close to the cover top, the upper section of the tapered wall is tightly attached to the outer sealing ring to form an outer sealing ring squeezing part, when the container opening is unscrewed and covered, the pressure of the outer sealing ring on the outer wall of the container opening is greater than the pressure of the inner sealing ring on the inner wall of the container opening, and the vertex angle of the tapered wall is 26-49 degrees. The invention forms an annular tapered wall with a small upper part and a big lower part on the cover wall close to the cover top, namely the upper section of the unscrewing cover is of a structure with the small upper part and the big lower part, the cross section of the cover wall of the section is inclined, the outer sealing ring is extruded by the tapered wall to form an extruding part, the inner side surface of the outer sealing ring is tightly attached to the outer wall of the container opening after being extruded by the extruding part, and the pressure of the outer sealing ring to the outer wall of the container opening is greater than that of the inner sealing ring to the inner wall of the container opening, thus ensuring the sealing of the outer sealing ring to the container opening, solving the problem of poor sealing performance of the traditional process in the form of pressing the container opening by the cover top and a single-side (inner side) sealing ring, simultaneously, because the extruding part of the invention is of the tapered structure with the small upper part and the big lower part, the unscrewing cover is easy to escape from the container opening when the unscrewing cover is opened, and the problem that the unscrewing cover is difficult to open due to the large friction force, the opening of the unscrewing cover is facilitated on the premise of ensuring sealing. The top angle is an included angle between conical walls on two sides of the cover top, the top angle is too small, and the lateral extrusion force of the outer sealing ring to the container opening is too large, so that the opening force of the unscrewing cover is too large easily; if the vertex angle is too large, the pressure of the outer sealing ring on the container opening is too small, and although the opening is easy, the sealing performance is poor.

Preferably, the inner side surface of the inner sealing ring is in transitional connection with the lower surface of the sealing gasket (namely the bottom surface of the sealing gasket which is close to the inner sealing ring and does not extend downwards) through a compression-resistant cambered surface, and the radius of the compression-resistant cambered surface is 0.7 to 1.3 times of the height of the cross section of the inner sealing ring; the lower part of the annular conical wall is provided with a plurality of internal pressure release openings punched inwards along the circumferential direction of the cover wall, and the cover wall at the lower side edge of the internal pressure release openings is bent inwards to form an inwards inclined plane structure. The compression-resistant cambered surface is arranged between the inner side surface of the inner sealing ring and the lower surface of the sealing gasket, so that the compression resistance of the inner sealing ring can be obviously improved, and the sealing effect of the interference ring on the inner wall of the container opening is strengthened. The internal pressure release port is used for releasing gas or liquid in the container in time when the pressure in the container is overlarge, so that the serious result caused by direct flying of the unscrewing cover due to overlarge pressure in the container is avoided.

Preferably, a decompression groove extending along the sealing groove is arranged on one side, close to the inner sealing ring, of the groove bottom of the sealing groove, the opening width of the decompression groove is 11% -24% of the width of the groove bottom of the sealing groove, and the depth of the decompression groove is 16% -29% of the width of the groove bottom of the sealing groove; the center line of the cross section of the pressure reducing groove is parallel to the center line of the cross section of the sealing groove, the inner side groove wall of the pressure reducing groove and the inner side groove wall at the groove bottom of the sealing groove are on the same cylindrical surface (namely the inner side groove wall of the pressure reducing groove is formed by extending the inner side groove wall of the sealing groove close to the groove bottom), and the groove bottom of the pressure reducing groove is arc-shaped. The function of the pressure reducing groove is to properly reduce the resistance of the inner sealing ring entering the container opening, and avoid the serious damage to the sealing performance of the container caused by the excessive resistance when the container opening is unscrewed and sealed by the cover due to the existence of the interference ring and the pressure-resistant cambered surface and the wrinkle at the interference ring caused by the excessive squeezing of the sealing gasket at the upper edge of the opening part of the container. Although the resistance when the container mouth is capped by unscrewing the cap can be reduced by reducing the compression-resistant cambered surface, the influence on the sealing performance of the interference ring is large, the influence can be reduced to the minimum degree by arranging the pressure reduction groove, and meanwhile, the phenomenon that the interference ring is folded is avoided, so that the technical scheme is ideal; on the other hand, the size of the cross section of the pressure reducing groove has a great influence on the sealing performance, and the oversize pressure reducing groove not only influences the sealing of the top end of the container mouth, but also reduces the sealing performance of the interference ring, so that the pressure reducing groove needs to be controlled within a reasonable range.

Preferably, the lower end of the outer side surface of the inner sealing ring is provided with a guide arc-shaped edge, and the upper edge of the guide arc-shaped edge is connected with the lower edge of the interference ring. The guide arc edge plays a guide role when the unscrewing cover is matched with the container opening.

The invention has the beneficial effects that: 1. the problem that the unscrewing cap in the prior art lacks a product quality safety reminding function and the unscrewing cap in the prior art is easy to hurt an operator in the cap opening process is effectively solved, the product quality safety reminding can be carried out on a consumer, and the safety of the unscrewing cap in the using process is greatly improved. 2. The problems that in the prior art, the container is easily collapsed and the neck of the anti-theft ring of the container is deformed due to overlarge capping pressure during capping of the unscrewing cap are solved, and the problems that the container is collapsed and the neck of the anti-theft ring of the container is deformed during capping of the unscrewing cap are greatly reduced. 3. The problem of prior art's screw-on cap appear the leakproofness variation easily, lead to the product shelf life to shorten greatly is solved. The twist-off type unscrewing cap has the advantages of being good in anti-theft sealing performance and convenient to open, and has a product quality safety reminding function, and high practical value.

Drawings

FIG. 1 is a cross-sectional view of one construction of a twist-off closure having a safety feature in accordance with the present invention;

FIG. 2 is a partial cross-sectional view of the twist-off cap of the present invention;

FIG. 3 is a cross-sectional view of another partial construction of the twist-off cap of the present invention;

FIG. 4 is a partial cross-sectional view of the invention shown in a configuration in which the cap is unscrewed to close the mouth of the container;

FIG. 5 is a cross-sectional view of another alternate embodiment of the invention shown in the open position with the cap removed to close the mouth of the container;

FIG. 6 is a partial cross-sectional view of the structure at the location of the swing-out cover bridge of the present invention;

FIG. 7 is a schematic view of the invention in a stressed state during unscrewing of the closure over the mouth of the container;

fig. 8 is a structural sectional view of the unscrewing cap of the present invention in an operating state (negative pressure state).

In the figure: 1. the anti-theft cap comprises a cap top, 2 parts of a cap wall, 3 parts of an anti-theft ring, 4 parts of a sealing gasket, 5 parts of a container opening, 6 parts of an inner sealing ring, 7 parts of an outer sealing ring, 8 parts of a sealing groove, 9 parts of a material containing groove, 10 parts of an interference ring, 11 parts of a conical wall, 12 parts of an extrusion part, 13 parts of a compression-resistant arc surface, 14 parts of a pressure reducing groove, 15 parts of a guide arc edge, 16 parts of an inner pressure releasing opening, 17 parts of a bridge, 18 parts of a convex ring, 19 parts of an annular groove, 20 parts of a U-shaped kerf, 21 parts of a stamping opening, 22 parts of a notch.

Detailed Description

The following further describes embodiments of the present invention by way of examples, with reference to the accompanying drawings.