A sealed container with automatic pressure relief on decap

Abstract

The present application relates to the field of containers for storing objects or materials, and in particular to a sealed container with automatic pressure relief when the lid is opened. The container comprises a lid, a box and a lock connected to the lid. The lock comprises a connecting section and a clamping section. One end of the connecting section is connected to the lid, and the other end is fixed to the clamping section. The clamping section is provided with a clamping structure for clamping the box, and forms an angle with the connecting section. The angle allows the connecting section to be in contact with the lid synchronously in the clamped state. The present application links the opening and closing of the pressure relief hole with the opening and closing of the lock, so that the pressure relief hole is synchronously blocked in the clamped state, and synchronously opened in the open state. The operator does not need to control it additionally, and the opening and closing steps of the container are simplified.

Description

[0001] This application is a divisional application of the patent application filed on March 24, 2025, with application number 2025103454343 and invention title "Double-lock Sealing Container". Technical Field

[0002] This invention relates to the field of containers for storing objects or materials, and more particularly to a sealed container that automatically releases pressure when the lid is opened. Background Technology

[0003] As the hot food inside the lunchbox cools down, the internal pressure gradually decreases until it creates negative pressure on the lid, making it difficult to remove the lid from the box even after the latch connecting the lid to the box body is opened.

[0004] In existing technologies, a pressure relief hole is usually added to the top of the lid, and the closed pressure relief hole is opened before opening the lid to achieve pressure balance inside and outside the lunch box, thus making it easier to open the lid.

[0005] However, this method requires users to not only operate the latch to open and close each time they operate the container, but also to take the extra step of controlling the opening and closing of the pressure relief hole, which is rather cumbersome. Summary of the Invention

[0006] The purpose of this invention is to provide a sealed container that automatically releases pressure when opened, so as to solve the problem of cumbersome opening and closing processes of sealed containers in the prior art.

[0007] The technical solution of the present invention is: a sealed container with automatic pressure relief upon opening, comprising a lid, a box body, and a latch rotatably connected to the lid. The latch includes a connecting section and a fastening section; One end of the connecting section is rotatably connected to the cover, and the other end is fixed to the fastening section; The fastening section is provided with a fastening structure for fastening with the box body and forms an angle with the connecting section, which allows the connecting section to fit synchronously with the cover body in the fastened state.

[0008] The cover is provided with a pressure relief hole corresponding to the connecting section, and the connecting section is provided with a plug to cooperate with the pressure relief hole; the plug is configured to seal the pressure relief hole in the locked state, and to move out of the pressure relief hole in response to the separation of the latch from the box.

[0009] A first positioner is provided near the pressure relief hole, and a second positioner is provided on the connecting section in conjunction with the first positioner. When the first positioner is engaged, it cooperates with the second positioner to restrict the movement of the plug along the radial direction of the pressure relief hole.

[0010] The cover includes a first component disposed at the center and a second component disposed around the first component, wherein the first component has a higher elastic modulus than the second component.

[0011] The first component is made of glass, and the second component is made of plastic or silicone.

[0012] The cross-section of the latch parallel to its own width direction is set as an L-shaped structure. In the open state, the outer wall of the latch abuts against the top of the cover to form a fulcrum, and thus the part of the latch away from the rotating connection end of the cover can be constructed as a handle.

[0013] The lid is provided with a limiting protrusion at one end near the box body, and the rotating connection end of the limiting protrusion and the fastening end of the fastener and the box body are in the same vertical plane.

[0014] Compared with the prior art, the advantages of the present invention are: (1) By linking the opening and closing of the pressure relief hole with the opening and closing of the latch, the present invention achieves that the pressure relief hole is simultaneously blocked when it is latched and simultaneously opened when it is open. No additional control by the operator is required, simplifying the opening and closing steps of the container.

[0015] (2) By setting the first locator and the second locator on the cover and the buckle respectively, an anchor point is formed to limit the influence of the buckle's tolerance and deformation on the relative position of the plug and the pressure relief hole during the fastening process, which greatly improves the fitting accuracy of the plug and the pressure relief hole and ensures the sealing effect.

[0016] (3) The latch of the present invention can be used as a handle during the opening action, making it convenient for the operator to lift the lid. At the same time, the latch forming the handle can also serve as a support for the lid after the lid is flipped over, so that the lid can be suspended on the table, avoiding the operator's hands from contacting the contents attached to the inner wall of the lid when closing the lid again.

[0017] (4) The cover structure is made of different materials, which not only ensures the rigidity of the first component in the middle of the cover to resist the warping of the two ends of the cover, but also makes it easy to process the second component on the edge of the cover, the pressure relief hole, the rotating shaft with the lock, and the sealing groove to accommodate the sealing ring. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a structural diagram of a sealed container with automatic pressure relief upon opening, as described in this invention. Figure 2 This is a schematic diagram of the open lid state as described in this invention; Figure 3 This is a schematic diagram of the force applied to the latch described in this invention; Figure 4 This is a schematic diagram of the handle structure described in this invention; Figure 5 This is a schematic diagram of the support structure described in this invention; Figure 6 This is a schematic diagram of the limiting protrusion structure described in this invention; Figure 7 This is a schematic diagram of the buckle-less end warping described in this invention; Among them: 1. Cover, 11. First component, 12. Second component, 13. Limiting protrusion, 2. Box body, 3. Lock, 31. Connecting section, 32. Fastening section, 33. Rotating shaft, 34. Fastening structure, 41. Pressure relief hole, 42. Plug, 51. First locator, 52. Second locator. Detailed Implementation

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", 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 application 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 application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] The present invention will be further described in detail below with reference to specific embodiments: like Figure 1As shown, a sealed container with automatic pressure relief upon opening includes a lid 1, a housing 2, a latch 3, and an O-ring. One end of the latch 3 is rotatably connected to the lid 1, and the other end can engage with the housing 2. During this engagement, a traction force is applied to the lid 1, causing it to move towards the housing 2, pressing the lid 1 against the housing 2. The O-ring, which abuts against both the lid 1 and the housing 2, is compressed vertically to form a sealing surface. When the latch 3 engages with the housing 2, the O-ring elastically resets and lifts the lid 1 a certain distance, thus disengaging the lid 1 from the housing 2.

[0023] Specifically, such as Figure 2 As shown, the latch 3 consists of two parts: a connecting section 31 and a fastening section 32. The connecting section 31 is rotatably connected to the cover 1 near its center via a pivot 33, and the fastening section 32 is provided with a fastening structure 34 for fastening with the box body 2. In a preferred embodiment of this application, the fastening section 32 and the connecting section 31 are integrally formed and bent to form a shape that is substantially perpendicular to each other. This arrangement allows the connecting section 31 to conform to the top surface of the cover 1 when the fastening section 32 is fastened to the box body 2.

[0024] The fit between the lid and the top surface of the lid gives the container a simple shape. More importantly, it can cooperate with the pressure relief hole 41 on the lid to realize that the opening and closing of the pressure relief hole 41 is synchronized with the opening and closing of the lid.

[0025] In existing sealed containers, negative pressure can easily arise when opened due to changes in the volume of the sealed chamber or the temperature of the contents. This negative pressure prevents the lid 1 from easily separating from the container 2 even after it has been unfastened. This is typically addressed by adding a pressure relief hole 41 to the lid 1 for manual opening or closing to achieve pressure balance inside and outside the container or to seal the internal chamber. However, this undoubtedly makes the already complex opening and closing process of traditional sealed containers even more cumbersome.

[0026] Therefore, this application links the pressure relief hole 41 with the connecting section 31 of the latch 3, so that the pressure relief hole 41 is blocked synchronously when the latch 3 is engaged; and the pressure relief hole 41 is opened synchronously when the latch 3 is disengaged.

[0027] Specifically, the pressure relief hole 41 is located on the cover 1 corresponding to the connecting section 31. When the connecting section 31 is in the locked state, a plug 42 protrudes from the bottom surface corresponding to the pressure relief hole 41 and is fixed thereto. The plug 42 is fixed to the connecting section 31 and can therefore move synchronously with the connecting section 31. When the latch 3 rotates around the pivot 33 to enter the locked state, the plug 42 can also be inserted into the pressure relief hole 41 synchronously to seal it. Similarly, after the latch 3 is opened, the plug 42 can also be removed from the pressure relief hole 41 synchronously. No additional control from the operator is required.

[0028] However, in practical applications such as Figure 3 As shown, the tension FL of the latch 3 in the latched state is not vertically downward as ideally intended. Instead, due to manufacturing tolerances of the cover 1, latch 3, or box 2, as well as the inherent elasticity of the latch 3, a portion of the tension FL, FL1, is horizontal and outward. This component FL1 prevents the various parts of the connecting section 31 from maintaining the same relative position with the cover 1 during each latching process. Furthermore, the plug 42 in this application is fixed to the connecting section 31. Therefore, the plug 42 and pressure relief hole 41, which ideally fit together, may not align effectively during actual latching due to deformation of the latch 3 caused by the component FL1, thus affecting the sealing effect.

[0029] To solve this problem, such as Figure 2 As shown, this application provides a first positioner 51 on the left and right sides of the cover 1 near the pressure relief hole 41, and a second positioner 52 is provided on the connecting end in conjunction with the first positioner 51.

[0030] While the latch 3 engages with the housing 2, the first positioner 51 can cooperate with the second positioner 52 before the plug 42 is fully inserted into the pressure relief hole 41. The engaged first positioner 51 and second positioner 52 form an anchor point. This anchor point limits the tolerance and deformation range that could affect the relative position of the plug 42 and the pressure relief hole 41 to the area between the anchor point and the rotating connection end of the latch 3, thus eliminating the influence of the portion from the anchor point to the engagement end of the latch 3 and the housing 2. This significantly improves the fitting accuracy between the plug 42 and the pressure relief hole 41.

[0031] Furthermore, because the distance between the rotating connection end of the latch 3 on the cover 1 and the fastening end on the box 2 is relatively long and there is no fixed point with the cover 1 or the box 2, it is easily disturbed by external forces, which can cause the plug 42 to shift from the pressure relief hole 41, resulting in air leakage. The anchor points generated by the first positioner 51 and the second positioner 52 can also resist the influence of this external force on the plug 42.

[0032] Specifically, in this embodiment, the first positioner 51 and the second positioner 52 are respectively configured as a positioning groove and a positioning block integrally formed with the corresponding cover 1 and latch 3. Based on the same concept, the first positioner 51 and the second positioner 52 can also be configured as a matching snap-fit ​​structure, or other structures that can limit the position in the horizontal direction.

[0033] After achieving the synchronous opening and closing effect of the pressure relief hole 41, the latch 3 of this application can realize another purpose, namely, as a handle when opening the cover.

[0034] Because the connecting segment 31 and the engaging segment 32 are perpendicular to each other, therefore... Figure 4As shown, during the opening action, after the latch 3 rotates outward around the pivot 33, the outer wall of the connecting section 31 and the fastening section 32 at the bend can abut against the top surface of the cover 1, and the abutment point will form a fulcrum, so that the fastening section 32 on the two latches 3 can be constructed as a handle. The operator can lift the cover 1 by pressing the two fastening structures 34 with two fingers at the same time.

[0035] And, as Figure 5 As shown, the latch 3 forming the handle can also serve as a support for the lid 1 after the lid 1 is flipped over, allowing the lid 1 to be suspended on the table. This makes it convenient for the operator to reach under the lid 1 and pick it up for resealing without touching the inner wall of the lid 1, thus avoiding contact between the operator's hands and the contents (such as food or soup) attached to the inner wall of the lid 1.

[0036] Regarding the double-locking structure of this application, as Figure 7 As shown, because both latches 3 are engaged with the middle of the cover 1, the two ends of the cover 1 without latches are prone to tilting upwards due to the leverage effect generated by the elastic force FT of the O-ring seal.

[0037] In this regard, in a preferred embodiment, this application combines... Figure 2 and Figure 6 As shown, a limiting protrusion 13 protrudes downwards from the bottom edge of the cover 1. The limiting protrusion 13 is located in the same vertical plane formed by the rotating connection end of the latch 3 and the cover 1, and the fastening end of the latch 3 and the box 2. During the fastening action, as the cover 1 compresses the O-ring and moves towards the box 2, the length of the limiting protrusion 13 is configured to abut against the top of the box 2 when the O-ring is compressed and fully contacts the cover 1, preventing further movement of the cover 1. This limits the downward pressure of the latched end of the cover 1, reducing excessive pressure on the O-ring. When the travel at this point is limited, the upward tilt of the two unlatched ends of the cover 1 is correspondingly reduced under the leverage effect.

[0038] In addition, combined Figure 1 and Figure 2 As shown, the cover 1 in this application can be composed of two different materials, including a first component 11 located at the center and a second component 12 surrounding the first component 11. The first component 11 is made of a material with a greater elastic modulus than the second component 12, and the latch 3, pressure relief hole 41, first locator 51, and sealing groove for accommodating the sealing ring are all disposed on the second component 12.

[0039] In this embodiment, the first component 11 is made of glass, which makes the middle of the entire cover 1 rigid, thus making the two unfastened ends of the cover 1 less prone to curling up. Furthermore, the glass structure allows the operator to easily observe the contents without opening the cover. In this embodiment, the second component 12 is injection molded onto the periphery of the first component 11 and is made of plastic or silicone material. These materials have better processing performance than glass, thereby reducing the processing costs of the latch 3, pressure relief hole 41, first positioner 51, and sealing groove accommodating the sealing ring. In other embodiments of this application, the first component 11 may also be made of a material with similar characteristics to glass, that is, a balance of rigidity and transparency, while the second component 12 may be made of other injection-molded materials with good processing performance.

[0040] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A sealed container with automatic pressure relief upon opening, comprising a lid (1), a box body (2), and a latch (3) rotatably connected to the lid (1), characterized in that: The latch (3) includes a connecting section (31) and a fastening section (32); One end of the connecting section (31) is rotatably connected to the cover (1), and the other end is fixed to the fastening section (32); The fastening section (32) is provided with a fastening structure (34) for fastening with the box body (2) and forms an angle with the connecting section (31), which allows the connecting section (31) in the fastened state to fit synchronously with the cover (1); The cover (1) is provided with a pressure relief hole (41) corresponding to the connecting section (31), and the connecting section (31) is provided with a plug (42) in conjunction with the pressure relief hole (41); the plug (42) is configured to block the pressure relief hole (41) in the latched state, and to move out of the pressure relief hole (41) in response to the separation of the latch (3) from the box (2).

2. The sealed container with automatic pressure relief upon opening, as described in claim 1, is characterized in that, A first locator (51) is provided near the pressure relief hole (41), and a second locator (52) is provided in conjunction with the first locator (51). The first locator (51) cooperates with the second locator (52) in the locked state to restrict the movement of the plug (42) radially along the pressure relief hole (41).

3. A sealed container with automatic pressure relief upon opening, as described in claim 1 or 2, characterized in that, The cover (1) includes a first component (11) disposed at the center and a second component (12) disposed around the first component (11), wherein the first component (11) has a higher elastic modulus than the second component (12).

4. A sealed container with automatic pressure relief upon opening, as described in claim 3, characterized in that, The first component (11) is made of glass, and the second component (12) is made of plastic or silicone.

5. A sealed container with automatic pressure relief upon opening, as described in claim 1, characterized in that, The buckle (3) has an L-shaped cross section parallel to its width direction. When the cover is open, the outer wall of the buckle (3) abuts against the top of the cover (1) to form a fulcrum. Therefore, the part of the buckle (3) away from the rotating connection end of the cover (1) can be constructed as a handle.

6. A sealed container with automatic pressure relief upon opening, as described in claim 1, characterized in that, The cover (1) is provided with a limiting protrusion (13) at one end near the box (2), and the rotating connection end of the limiting protrusion (13) and the latch (3) and the fastening end of the latch (3) and the box (2) are in the same vertical plane.

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