A can end

Abstract

The utility model discloses a can lid is used to the can body's jar mouth is encapsulated, and the outside wall on the can body jar mouth place has been processed with the thread, including the outer lock ring and the inner cover, the top end of outer lock ring forms the limit flange and extends radially to the inside, and the bottom end forms the spin and connects the tooth and extends radially to the inside, the inner cover is arranged in the inside of outer lock ring and moves and is limited between limit flange and spin and connects the tooth, and the outside wall of inner cover and the inside ring wall of outer lock ring axial sliding and circumferential rotation are connected, wherein, spin and connect the tooth with the thread of jar mouth outside wall and can make limit flange downward sealed and tightly the top end of inner cover, and the inner cover buckle and negative pressure adsorption on the jar mouth, the spin and connect the tooth screw up and lift the inner cover to open the jar mouth with loosening outer lock ring. The utility model discloses a can lid is more labor-saving when opening.

Description

Technical Field

[0001] This utility model relates to the field of can sealing technology, and more specifically to a can lid. Background Technology

[0002] Canned food refers to food made from qualified raw materials that have been processed, formulated, canned, sealed, sterilized, and cooled to achieve commercial sterility and can be stored for a long time at room temperature. The two key characteristics of canned food production are sealing and sterilization. To ensure a good seal, significant pressure is often applied to the can lid during the sealing process. After high-temperature sterilization, the can needs to be cooled. After cooling, the pressure inside the can is lower than the external pressure, which causes the can lid to be tightly adhered to the mouth of the can due to negative pressure suction.

[0003] Currently, can lids are usually opened manually by twisting them. If you are not strong enough, it is difficult to open them, such as for some women and children. Furthermore, using lid-opening tools to pry them open can damage the lid.

[0004] Therefore, providing a can lid that is reasonably designed, easy to use, and easy to open is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a can lid that solves the technical problem that the can lid is not easy to unscrew after the can is filled.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A can lid for sealing the opening of a can, wherein the outer wall of the can opening is threaded, and includes an outer locking ring and an inner lid; the top end of the outer locking ring extends radially inward to form a limiting flange, and the bottom end extends radially inward to form a screw-in protrusion; the inner lid is disposed inside the outer locking ring and is movably limited between the limiting flange and the screw-in protrusion, and the outer wall of the inner lid is axially sliding and circumferentially rotating connected to the inner wall of the outer locking ring; wherein, the screw-in protrusion screws into the thread of the outer wall of the can opening, allowing the limiting flange to seal against the top end of the inner lid downward, and the inner lid is fastened and adsorbed onto the can opening by negative pressure; loosening the outer locking ring allows the screw-in protrusion to spiral upward and lift the inner lid to open the can opening.

[0008] Through the above technical solution, this utility model discloses a can lid. When sealing the can opening, a negative pressure environment is formed inside the can, causing the inner lid to be sucked tightly onto the can opening. The screw-on protrusion of the outer locking ring is threaded onto the thread on the outer wall of the can opening, and the limiting flange of the outer locking ring presses downward against the top of the inner lid. At this time, there is a gap between the screw-on protrusion and the bottom of the inner lid. When opening the can lid, the outer locking ring is manually or with a tool turned. The inner lid does not move temporarily. As the screw-on protrusion rotates relative to the outer wall of the can opening, the limiting flange and the top of the inner lid no longer abut and a gap is created. The screw-on protrusion spirals upward and lifts the inner lid to open the can opening. The force of turning the outer locking ring is concentrated on the screw-on protrusion to apply force to the inner lid. According to the lever principle, the inner lid can be opened without much force. The can lid of this utility model is more labor-saving and convenient to open, and will not damage the inner lid.

[0009] Preferably, there are multiple screw-in protrusions, and the multiple screw-in protrusions are evenly arranged along the circumferential direction of the outer locking ring.

[0010] Preferably, a can lid further includes a sealing ring, which is bonded to the inner top wall of the inner lid and can seal against the top of the can.

[0011] The beneficial effect of adopting the above technical solution is that the sealing ring is used to seal the connection between the inner cover and the can opening, thereby improving the sealing performance of the can.

[0012] Preferably, the diameter of the outer locking ring is 85 mm.

[0013] Preferably, the distance between the limiting flange and the screw-on protrusion is 10mm-12mm; the thickness of the inner cover is 5mm-7mm.

[0014] The beneficial effects of adopting the above technical solution are that the limiting flange and the screw-in tooth can restrict the inner cover within the outer locking ring, preventing the inner cover from detaching from the outer locking ring, and the limiting flange and the screw-in tooth together limit the travel of the inner cover's outer locking ring. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a can lid according to the present invention;

[0017] Figure 2 This is a bottom view of a can lid according to the present invention;

[0018] Figure 3 This is a front cross-sectional view of a can lid according to the present invention;

[0019] Figure 4 This is an exploded view of a can lid according to the present invention;

[0020] Figure 5 This is an isometric view of the outer locking ring in a can lid according to this utility model;

[0021] Figure 6 This is a top view of the outer locking ring in a can lid according to the present invention;

[0022] Figure 7 This is an isometric view of the inner lid of a can lid according to the present invention;

[0023] Figure 8 This is a bottom view of the inner lid of a can lid according to the present invention.

[0024] Wherein: 1-outer locking ring, 2-inner cover, 11-limiting flange, 12-screw-in teeth, 3-sealing ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] See appendix Figures 1 to 8 According to an embodiment of the present invention, a can lid is used to seal the mouth of a can. The outer wall of the can mouth is threaded, and the lid includes an outer locking ring 1 and an inner lid 2. The top end of the outer locking ring 1 extends radially inward to form a limiting flange 11, and the bottom end extends radially inward to form a screw-in protrusion 12. The inner lid 2 is arranged inside the outer locking ring 1 and is movable and limited between the limiting flange 11 and the screw-in protrusion 12. The outer wall of the inner lid 2 slides axially and rotates circumferentially with the inner wall of the outer locking ring 1. The screw-in protrusion 12 screws into the threaded connection of the outer wall of the can mouth, allowing the limiting flange 11 to seal and press against the top end of the inner lid 2 downwards, and the inner lid 2 is fastened and adsorbed onto the can mouth under negative pressure. Loosening the outer locking ring 1 allows the screw-in protrusion 12 to spiral upwards and lift the inner lid 2 to open the can mouth.

[0029] When sealing the can opening, first place the inner cover 2 on the can opening, then screw the outer locking ring 1 downwards. As the outer locking ring 1 moves downwards, the limiting flange 11 will press down on the top of the inner cover 2, making the inner cover 2 tightly fastened to the can opening. After the can is sterilized at high temperature, the negative pressure formed inside will cause the inner cover 2 to stick tightly to the can opening. When opening the can lid, the outer locking ring 1 and the inner cover 2 are not connected as a whole and can rotate relative to each other. Screw the outer locking ring 1 upwards. As the outer locking ring 1 spirals upwards, the force applied to the outer locking ring 1 will be concentrated on the screwing protrusion 22 to push the inner cover 2. According to the lever principle, the inner cover 2 can be opened without much force.

[0030] Specifically, the diameter of the outer locking ring 1 is 85mm.

[0031] The inner cover 2 can only move axially between the limiting flange 11 and the screw-in tooth 22. Specifically, the distance between the limiting flange 11 and the screw-in tooth 22 is 10mm-12mm; the thickness of the inner cover 2 is 5mm-7mm.

[0032] In some specific examples, there are multiple screw-in protrusions 22, which are evenly arranged along the circumference of the outer locking ring 1.

[0033] Specifically, the number of screw-in protrusions 22 in this utility model is 6.

[0034] In other specific examples, a can lid also includes a sealing ring 3, which is bonded to the inner top wall of the inner lid 2 and can be pressed against the top of the can.

[0035] The sealing ring 3 can seal the connection between the inner cover 2 and the can opening.

[0036] Before opening, the inner lid 2 of this invention is tightly attached to the mouth of the can, with the limiting flange 11 pressing downward against the top of the inner lid 2, and a gap existing between the screw-on teeth 12 and the bottom of the inner lid 2. When opening the can lid, the outer locking ring 1 is loosened manually or with a tool. The outer locking ring 1 spirals upward, causing the limiting flange 11 to no longer press against the top of the inner lid 2 and creating a gap. The screw-on teeth 12 approach the bottom of the inner lid 2 and push the inner lid 2 upward to open the can mouth. During this process, the force applied to the outer locking ring 1 is concentrated on multiple screw-on teeth 22 and pushes the inner lid 2 upward. According to the lever principle, the inner lid 2 can be lifted without using a large force. This device is more labor-saving when opening.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A can lid for sealing the opening of a can, wherein threads are machined on the outer side wall of the can opening, characterized in that, include: The outer locking ring (1) has a top end that extends radially inward to form a limiting flange (11) and a bottom end that extends radially inward to form a screw-in protrusion (12). Inner cover (2), the inner cover (2) is arranged inside the outer locking ring (1) and is movable and limited between the limiting flange (11) and the screw-in protrusion (12). The outer side wall of the inner cover (2) is axially sliding and circumferentially rotating connected to the inner side wall of the outer locking ring (1). The screw-on protrusion (12) is screwed into the threaded outer wall of the can opening, which allows the limiting flange (11) to seal against the top of the inner cover (2) downwards, and the inner cover (2) is fastened and adsorbed onto the can opening by negative pressure; loosening the outer locking ring (1) allows the screw-on protrusion (12) to spiral up and lift the inner cover (2) to open the can opening.

2. A can lid according to claim 1, characterized in that, There are multiple screw-in protrusions (12), and the multiple screw-in protrusions (12) are evenly arranged along the circumferential direction of the outer locking ring (1).

3. A can lid according to claim 1, characterized in that, It also includes a sealing ring (3), which is bonded to the inner top wall of the inner cover (2) and can seal against the top of the tank.

4. A can lid according to any one of claims 1-3, characterized in that, The diameter of the outer locking ring (1) is 85 mm.

5. A can lid according to any one of claims 1-3, characterized in that, The distance between the limiting flange (11) and the screw-on protrusion (12) is 10mm-12mm; the thickness of the inner cover (2) is 5mm-7mm.

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