Sealed Tank

Abstract

To provide a convenient sealed tank that has a good freshness-preserving effect and is stable in use. [Solution] The sealed tank includes a base cover 1 and a bottom cover 2 spaced apart from each other in the vertical direction, a sealing ring provided on the circumferential outer edge of the bottom cover, and a tank body 8 provided at its upper end with an open top. The bottom cover is provided at the inner upper end of the tank body, and the base cover engages and covers the open opening of the tank body. The outer edge of the base cover is provided laterally as an outer edge A11, and a lower edge A12 is provided inside the outer edge A and extends downward from the base cover. The lower edge A is close to the inner wall of the tank body, and the sealing ring is an elastic ring. The base cover includes an inner ring 31 connected to the edge and an outer ring 32 arranged on the outer wall of the lower edge A, the outer ring being higher than the inner ring in a horizontal position, and further includes a movable assembly, the movable assembly including a movable seat 41 provided on the upper surface of the base cover and a movable column 42 fixedly connected to the bottom cover, the base cover having a through hole and a through cavity in the middle of the movable seat, the movable column passing through the through hole and the through cavity, and the movable assembly can move the movable column toward and away from the base cover through relative movement.

Description

[Technical Field]

[0001] The present invention relates to the field of storage products, and in particular to sealed tanks. [Background technology]

[0002] Currently, when preserving food or other goods, a lidded tank is often used to isolate it from the outside world. One type of tank has a lid that is placed on the tank body, but because there is a gap between the lid and the tank body, moisture and gas from the outside enter the internal space, causing moisture deterioration of the goods. Furthermore, when placed on the tank, the lid and the tank body cannot be fixed firmly, so the tank is likely to shake or tip over, causing the lid to fall off the tank body. Another type of tank is sealed by fastening the lid to the tank body using a conventional method such as a snap or screw. However, the air pressure inside and outside the tank body is the same, and the moisture content and oxygen content within the internal unit volume when sealed are the same as those of the outside, which results in poor freshness retention. Summary of the Invention

[0003] In response to the shortcomings of the prior art, the object of this invention is to provide a sealed container that has good freshness preservation effect, is stable to use, and is convenient to use.

[0004] The above technical object of the present invention is achieved by the following technical means.

[0005] The sealed tank comprises a base cover and a bottom cover spaced apart from each other above and below, a sealing ring on the circumferential outer edge of the bottom cover, and a tank body open at its upper end, the bottom cover being attached to the inner upper end of the tank body, the base cover engagingly covering the open mouth of the tank body, the outer edge of the base cover being laterally defined as an outer edge A, and a lower edge A extending downward from the base cover being provided inside the outer edge A, the lower edge A being adjacent to the inner wall of the tank body, the sealing ring being an elastic ring, comprising an inner ring connected to the circumferential outer edge of the bottom cover and an outer ring disposed on the outer wall of the lower edge A, the outer ring being higher than the inner ring in a horizontal position, and the movable assembly further comprising a movable seat provided on the upper surface of the base cover and a movable column fixedly connected to the bottom cover, the base cover being provided with a through hole and a through cavity provided in the center of the movable seat, the movable column passing through the through hole and the through cavity, the movable assembly being movable by relative movement. The movable column can move the bottom cover closer to and away from the base cover. In its natural state, the bottom cover is separated from the base cover, leaving a gap between the lower edge A and the inner wall of the tank body, allowing outside air to enter the tank body, and the sealed tank is in an unsealed state. The movement of the movable assembly causes the movable column to rise, attracting the bottom cover to the base cover. The sealing ring rises synchronously, moving the outer ring up until it closes the gap between the outer edge A and the inner wall of the tank body, forming a seal on the sealed tank. The bottom cover continues to rise, making the air density inside the tank body lower than that of the outside world and generating negative pressure. The base cover is fastened and sealed to the tank body, and the movable assembly moves in the opposite direction, causing the bottom cover to move downwards under the action of its own gravity or / and the pressing action of the movable column. The sealing ring descends synchronously, moving the outer ring down so as not to close the gap between the outer edge A and the inner wall of the tank body, allowing outside air to enter the tank body, and the sealed tank returns to its natural unsealed state.

[0006] In a sealed tank according to an embodiment of the present invention, an outer peripheral groove is provided on the circumferential outer edge of the bottom cover, and the outer peripheral groove is an annular groove that opens outward. The minimum diameter of the inner ring is smaller than the maximum diameter of the outer peripheral groove. After the sealing ring is expanded under force, the inner ring is stretched and fitted into the outer peripheral groove to form a fastening.

[0007] The sealed tank according to an embodiment of the present invention further includes a spring A fitted to the outside of the movable column, the upper end of which abuts against the bottom surface of the base cover and the lower end of which abuts against the top surface of the bottom cover, so that the bottom cover is spaced apart from the base cover in its natural state, and the lifting of the bottom cover can compress the spring A and bring it closer to the base cover.

[0008] In a sealed tank according to an embodiment of the present invention, the lower end of the lower edge A is formed as a slope sloping from the outside to the inside, and the outer ring is disposed on the slope and can move up and down along the slope.

[0009] In a sealed tank according to an embodiment of the present invention, the base cover further has a lower edge B extending downward, and the bottom cover has an upper edge extending upward, which is fitted outside the lower edge B.

[0010] In a sealed tank according to an embodiment of the present invention, the base cover further includes a lower edge C parallel to the lower edge A, the lower edge C being located outside the outer edge A, an opening in the side wall of the tank body is accommodated between the lower edge A and the lower edge C, and a protruding position limiting base is provided on the upper side of the outer wall of the tank body, and the lower end of the lower edge C can abut against the upper surface of the position limiting base.

[0011] In the sealed tank according to the embodiment of the present invention, a protruding annular ring A is provided on the top surface of the bottom cover, and the spring A is restricted in position within the annular ring A to prevent rattle.

[0012] In a sealed tank according to an embodiment of the present invention, a through-hole is provided in a cylindrical body, an internal thread is provided on the inner wall of the through-hole, and an external thread is provided on the upper end external wall of the movable column, and the movable seat and the movable column are helically connected by the external thread and the internal thread, and when the movable seat rotates clockwise, the movable column rises, and when the movable seat rotates counterclockwise, the movable column descends.

[0013] In a sealed tank according to an embodiment of the present invention, the movable seat has two symmetrical slopes around the circumference of the through-bore, a horizontal bar is installed at the tip of the movable column, and the bottom walls of both ends of the horizontal bar are placed on the sloped surfaces of the slopes. The movable seat moves to move the horizontal bar relative to the slope, and the movable column can rise or fall accordingly.

[0014] In a sealed tank according to an embodiment of the present invention, a position limiting wall is provided adjacent to the bottom end of the slope of the slope, which can abut and limit the position of the crossbar. A downward-concave groove is provided at the tip of the slope, so that the crossbar can enter the groove to form a position limit and stop its movement without the action of external force, but can break away from the position limiting groove and continue moving up the slope when the action of external force is applied.

[0015] In a sealed tank according to an embodiment of the present invention, a stopper wall A having a height greater than the height of the slope is provided adjacent to the outside of the slope, and the stopper wall A limits the displacement of the cross bar along its longitudinal direction.

[0016] In a sealed tank according to an embodiment of the present invention, the movable seat is circular, the through hole is located at the center of the base cover, and the two slopes are spirally arranged symmetrically around the through hole. The slopes of the slopes are arranged clockwise, starting from high and gradually descending. When the movable seat rotates clockwise, the movable column rises accordingly, and when the movable seat rotates counterclockwise, the movable column descends accordingly.

[0017] The sealed tank according to the embodiment of the present invention further includes a top cover A fixedly connected to a movable seat, the top cover A and the movable seat both being mounted inside the base cover and being rotatable relative to the base cover, such that when the top cover A is rotated, the movable seat rotates synchronously.

[0018] In a sealed tank according to an embodiment of the present invention, the top cover (A) is made of a plastic material, the inner wall of the top cover (A) is provided with a first vertical convex ridge, the outer wall of the movable seat is provided with a vertical guide groove, the bottom end of the inner wall of the top cover (A) is provided with a second horizontal annular convex ridge, and the bottom end of the outer wall of the movable seat is provided with an annular position limiting groove.

[0019] In the sealed tank according to the embodiment of the present invention, a lever is horizontally provided on the outer edge of the top cover A to rotate the top cover A.

[0020] The sealed tank according to an embodiment of the present invention is cylindrical in shape and further includes a top cover (B) that is fitted to the outside of the base cover and is rotatable relative to the base cover. When the top cover (B) is rotated, the movable seat rotates synchronously.

[0021] In the sealed tank according to the embodiment of the present invention, the top cover B is integrally formed with the movable seat or is fixedly connected to the locking block through a locking hole.

[0022] In a sealed tank according to an embodiment of the present invention, the top cover (B) has a surface circumference with a number of arc-shaped grooves spaced apart, and the top surface of the base cover has position limiting posts, the position of which is limited within the arc-shaped grooves and can rotate relative to the rotation of the top cover (B).

[0023] The sealed tank according to the embodiment of the present invention further includes a top cover disposed on the top surface of the top cover (B).

[0024] In the sealed tank according to the embodiment of the present invention, the top cover is engaged with the edge of the top cover B and / or the position limiting posts, or is integrally formed with the top cover B.

[0025] In a sealed tank according to an embodiment of the present invention, the movable seat is rectangular, and two slopes are provided on both sides of the through-hole in the left-right direction, parallel to each other. The slopes of the slopes gradually descend from high to low from left to right, and the movable seat moves linearly to the right, causing the movable column to rise, and the movable seat moves linearly to the left, causing the movable column to descend.

[0026] In a sealed tank according to an embodiment of the present invention, the movable assembly is provided in a set, and the through-hole is provided in the center of the base cover.

[0027] In the sealed tank according to the embodiment of the present invention, the movable assemblies are provided in a plurality of sets, and the plurality of sets of movable assemblies are provided integrally or separately, and together form a rectangular outer periphery.

[0028] In the sealed tank according to the embodiment of the present invention, a rail is further provided on the top surface of the base cover in the left-right direction, and the movable seat is restricted in position within the rail and can move left and right along the rail.

[0029] A sealed tank according to an embodiment of the present invention further includes a top cover (C) integrally formed with or fixedly connected to the movable seat, the top cover (C) being attached to the base cover and capable of moving left and right to synchronize with the movable seat, and the area of ​​the top cover (C) being larger than that of the movable seat and smaller than that of the base cover.

[0030] In a sealed tank according to an embodiment of the present invention, at least two downwardly extending stopper walls B are provided on the underside of the top cover C, one stopper wall B abutting against the outer wall of the left side of the movable seat, and the other stopper wall B abutting against the outer wall of the right side of the movable seat.

[0031] In the sealed tank according to the embodiment of the present invention, the top cover C is provided with a grip portion for gripping and moving the top cover C with fingers.

[0032] A sealed tank according to an embodiment of the present invention further includes an upward fixed pillar located at the center of the bottom cover, with a spring B fitted into the fixed pillar, the upper end of which abuts the bottom surface of the base cover and the lower end of which abuts the top surface of the bottom cover, and the upper end of the fixed pillar is spaced apart from the base cover so as not to hinder movement between the base cover and the bottom cover.

[0033] As described above, the beneficial effects of this invention over the prior art are as follows: Under the action of the movable assembly, the bottom cover moves upward toward the base cover, and the outer ring moves upward until it closes the gap between the outer edge A and the inner wall of the tank body, forming a seal on the sealed tank. The bottom cover continues to rise, lowering the air density inside the tank body below that of the outside, generating negative pressure. After this, the oxygen content and water content per unit volume inside the tank body are both lower than those of the outside, effectively reducing or preventing oxidation and deterioration of the internal items, providing a better insurance effect. At the same time, because the outside air pressure is higher than that inside the tank body, the base cover is less likely to fall off the tank body and can be stably fixed to the tank body. When the movable assembly is moved in the opposite direction, the sealed state of the sealed tank is released, and the base cover can be easily removed from the tank body for ease of use. [Brief explanation of the drawings]

[0034] [Figure 1] FIG. 2 is a cross-sectional view showing the structure of the first embodiment in an unsealed state. [Figure 2] FIG. 2 is a cross-sectional view showing the structure of the first embodiment in a sealed state. [Figure 3] FIG. 10 is a cross-sectional view of the structure of the second embodiment in an unsealed state. [Figure 4] FIG. 10 is a cross-sectional view showing the structure of the second embodiment in a sealed state. [Figure 5] FIG. 2 is a structural schematic diagram of the movable seat of the first embodiment. [Figure 6] FIG. 2 is a structural schematic diagram of a movable column and a bottom cover according to the first embodiment. [Figure 7] FIG. 2 is a structural schematic diagram of a movable assembly and a bottom cover according to the first embodiment. [Figure 8] FIG. 10 is a schematic cross-sectional view of the exploded structure of the base cover and bottom cover of the second embodiment. [Figure 9] FIG. 2 is a schematic diagram of the overall structure of one of the sealed tanks of the first embodiment. [Figure 10] FIG. 2 is a schematic exploded view of the entire structure of one of the sealed tanks of the first embodiment. [Figure 11] FIG. 2 is a schematic diagram of the overall structure of one of the sealed tanks of the first and second embodiments. [Figure 12] This is a structural schematic diagram with a lever added to Figure 11. [Figure 13] 1 is a structural exploded schematic diagram of the top cover B, base cover and bottom cover of the first embodiment. FIG. [Figure 14] FIG. [Figure 15] FIG. 2 is another schematic diagram of the overall structure of the sealed tank of the first embodiment. [Figure 16] 16 is a schematic diagram of the bottom cover and the movable seat in FIG. 15 in a fixed connection disassembled state. [Figure 17] 16 is a schematic diagram of the bottom cover and the movable seat of FIG. 15 in an integrally installed disassembled state. [Figure 18] FIG. 1 is a perspective view of a sealed tank with a top cover. [Figure 19] FIG. 10 is an exploded structural schematic diagram of the top cover A and one of the movable seats of the second embodiment. [Figure 20] FIG. 10 is another exploded structural schematic diagram of the top cover A and the movable seat of the second embodiment. [Figure 21] FIG. 10 is a schematic diagram showing the overall structure of a sealed tank according to a third embodiment. [Figure 22] FIG. 10 is a cross-sectional view of the structure of the third embodiment in an unsealed state. [Figure 23] FIG. 10 is a cross-sectional view showing the structure of the third embodiment in a sealed state. [Figure 24] FIG. 24 is a perspective view of the overall structure of FIG. 23. [Figure 25] 21 and the top cover C. FIG. [Figure 26] FIG. 10 is an exploded structural schematic diagram of a third embodiment having a set of movable assemblies. [Figure 27] FIG. 10 is another exploded structural schematic diagram of the third embodiment having a set of movable assemblies. [Figure 28] FIG. 2 is a schematic diagram of the bottom cover and the sealing ring in an exploded state. [Figure 29] FIG. 10 is a structural schematic diagram of a movable seat according to a third embodiment. [Figure 30] FIG. [Figure 31] FIG. 10 is an exploded structural schematic diagram of the third embodiment having two sets of movable assemblies. [Figure 32] FIG. 10 is an exploded structural schematic diagram of the third embodiment having four sets of movable assemblies. DETAILED DESCRIPTION OF THE INVENTION

[0035] In describing the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "inner," "outer," "left," and "right" are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate or simplify the description of the present invention, and are not intended to indicate or imply that the indicated devices or elements must be configured and operated in a specific orientation or in a specific direction, and therefore should not be understood as limitations on the present invention.

[0036] The present invention will be described in more detail below with reference to the accompanying drawings.

[0037] As shown in FIGS. 1 to 32, the sealed tank includes a base cover 1 and a bottom cover 2 spaced apart vertically. That is, there is a certain distance between the bottom cover 2 and the base cover 1. The sealed tank further includes a tank body 8 with an open top. The bottom cover 2 is located at the upper interior end of the tank body 8, and the base cover 1 covers the open opening of the tank body 8. The outer edge of the base cover 1 is formed as an outer edge A11 extending laterally. A lower edge A12 extends downward from the base cover 1 inside the outer edge A11 and is adjacent to the inner wall of the tank body. A sealing ring 3 is provided on the outer circumferential edge of the bottom cover 2. The sealing ring 3 is an elastic ring, preferably made of rubber. The sealing ring 3 can deform to fill gaps and achieve a sealing effect. The sealing ring 3 includes an inner ring 31 connected to the circumferential outer edge of the bottom cover 2 and an outer ring 32 disposed on the outer wall of the lower edge A12, the outer ring 32 being higher than the inner ring 31 in a horizontal position, and the vertical movement of the inner inner ring 31 causes the outer outer ring 32 to move up and down on the lower edge A12 accordingly, and the outer ring 32 can fill the gap between the lower edge A12 and the inner wall of the tank body 8 by moving its position and deforming itself. To enable the vertical movement of the sealing ring 3, a movable assembly 4 is provided to realize the vertical movement of the bottom cover 2 relative to the base cover 1. The movable assembly 4 includes a movable seat 41 disposed on the upper surface of the base cover 1 and a movable post 42 fixedly connected to the bottom cover 2, the base cover 1 being provided with a through-hole and a through cavity 413 in the center of the movable seat 41, the movable post 42 passing through the through-hole and the through cavity 413, and the movable assembly 4 allows the movable post 42 to move the bottom cover 2 toward or away from the base cover 1 through relative movement. 1, 3 and 22, in a natural state, the bottom cover 2 is separated from the base cover 1, and there is a gap between the lower edge A12 and the inner wall of the tank body 8, but the outer ring 32 does not close this gap in its lowest state, allowing outside air to enter the tank body 8, and at this time, the sealed tank is in an unsealed state. As shown in FIGS. 2, 4 and 23, the movement of the movable assembly 4 raises the movable column 42 to draw the bottom cover 2 to the base cover 1, and the sealing ring 3 rises synchronously, moving the outer ring 32 up until it closes the gap between the outer edge A11 and the inner wall of the tank body 8, and the sealed tank is formed.Due to the elastic properties of the sealing ring 3, the outer ring 32 can close the gap by both displacement and deformation (i.e., an interference fit). Due to the "negative clearance" nature of the interference fit and the uncertainty of deformation, it is not possible to specifically show the shape of the outer ring 32 after closing the gap. Therefore, only the shape of the outer ring 32 displaced upward and extending beyond the outer edge A11 is shown. However, based on this figure, the operating principle of the outer ring 32 closing and forming a seal can be clearly understood and fully disclosed. After the sealed tank is sealed, the movable assembly 4 can continue to move, lifting the bottom cover 2, and the sealing ring 3 can deform to maintain the sealing function. At this time, the volume within the tank body 8 increases, the air density decreases, and the pressure within the tank body 8 becomes lower than the outside, generating a negative pressure. The air pressure difference fastens and seals the bottom cover 1 to the tank body 8. In other words, the movement of the movable assembly 4 first achieves a sealing effect, and then continues to move to achieve a negative pressure effect. When the movable assembly 4 moves in the opposite direction, the force lifting the movable column 42 disappears, allowing the bottom cover 2 to move downward under its own gravity, thereby moving the sealing ring 3 downward. Furthermore, the bottom cover 2 also moves downward under the pressure of the movable column 42, thereby moving the sealing ring 3 downward. Of course, the bottom cover 2 can also move the sealing ring 3 downward through the combined action of the two. When the sealing ring 3 and the outer ring 32 no longer seal the gap between the outer edge A11 and the inner wall of the tank body 8, outside air enters the tank body 8, the air pressure inside and outside the sealed tank becomes equal, and the sealed tank returns to its natural, unsealed state. To facilitate movement of the outer ring 32 within the gap between the lower edge A12 and the inner wall of the tank body 8, a slope 121 sloping from outside to inside is provided at the lower end of the lower edge A12. The outer ring 32 is positioned on the slope 121 and can move up and down along the slope 121. The inclined surface 121 not only provides a guiding function for the outer ring 32, but also makes the gap wider at the bottom and narrower at the top, so that the outer ring 32 can achieve a better deformation sealing effect.

[0038] 28, to facilitate the connection between the bottom cover 2 and the sealing ring 3, an outer peripheral groove 23 is provided on the circumferential outer edge of the bottom cover 2, which is an annular groove opening outward, and the minimum diameter of the inner ring 31 is smaller than the maximum diameter of the outer peripheral groove 23. After the sealing ring 3 expands under force, the diameter of the inner ring 31 is extended so that it can be fitted into the outer peripheral groove 23. After the external force is removed, the inner ring 31 returns to its original state, thereby forming a fastening connection between the sealing ring 3 and the bottom cover 2, i.e., the sealing ring 3 is fitted into the outer peripheral groove 23 based on its own elasticity. Of course, the reverse arrangement of the above-mentioned structure and connection relationship between the sealing ring 3 and the bottom cover 2 also belongs to the equivalent substitution of the present invention.

[0039] The sealing ring 3 is made of an elastic material and can stretch and deform to fit the outer edge groove 23 of the bottom cover 2 of different shapes, so it can be made into a universal type, for example, a circular type. The sealing ring 3 can be simultaneously used with bottom covers 2 of various shapes, such as circular and rectangular. Preferably, the sealing ring 3 is made into the same shape as the bottom cover 2, so that if the bottom cover 2 is rectangular, the sealing ring 3 is rectangular, and if the bottom cover 2 is circular, the sealing ring 3 is circular, making it a custom-made type. A boundary line X is preferably set between the inner ring 31 and the outer ring 32. The boundary line X is a fixed line, and in a natural state, the inner ring 31 is arranged horizontally and the outer ring 32 is arranged diagonally upward.

[0040] When it is necessary to move the bottom cover 2 downward, a spring A102 is fitted to the outside of the movable column 42 to make the movement faster. The upper end of the spring A102 abuts against the bottom surface of the base cover 1, and the lower end abuts against the top surface of the bottom cover 2, separating the bottom cover 2 from the base cover 1 in its natural state, and when the bottom cover 2 rises, the spring A102 is compressed to bring it closer to the base cover 1. To make better use of the spring A102, a protruding annular ring A22 is provided on the top surface of the bottom cover 2, and by restricting the position of the spring A102 within the annular ring A22, it is possible to prevent it from rattling.

[0041] In order to make the up and down movement of the bottom cover 2 more stable, the base cover 1 is provided with a lower edge B13 extending downward, and the bottom cover 2 is provided with an upper edge 21 extending upward, which is fitted to the outside of the lower edge B13, thereby providing a guide for the relative movement of the bottom cover 2 and the base cover 1.

[0042] 1 and 3, the outer edge A11 is placed directly on the side wall of the opening of the tank body 8 to realize a locking cover of the base cover 1 to the tank body 8. In order to improve the locking cover effect of the base cover 1 to the tank body 8, as shown in FIGS. 22 and 23, the base cover 1 is provided with a lower edge C16 parallel to the lower edge A12, the lower edge C16 is provided outside the outer edge A11, the opening of the side wall of the tank body 8 is accommodated between the lower edge A12 and the lower edge C16, and a protruding position limiting base 81 is provided on the upper side of the outer wall of the tank body 8, and the lower end of the lower edge C16 can abut on the upper surface of the position limiting base 81. With this installation, the base cover 1 can form inner and outer positional limits through the lower edge A12 and the lower edge C16 without being displaced relative to the side wall of the opening of the tank body 8, thereby achieving a better locking cover effect, and can also be adapted to tank bodies 8 with different heights of the positional limiting base 81 as needed. For example, when the positional limiting base 81 is in a high position, the lower edge C16 abuts against the positional limiting base 81, and the outer edge A11 is higher than and floats above the side wall of the opening of the tank body 8, and when the positional limiting base 81 is in an appropriate position, the lower edge C16 abuts against the positional limiting base 81 and the outer edge A11 is attached to and placed on the side wall of the opening of the tank body 8; when the positional limiting base 81 is in a low position, the outer edge A11 is attached to and placed on the side wall of the opening of the tank body 8, and the lower edge C16 does not abut against the positional limiting base 81.

[0043] The movable assembly 4 has the following three embodiments.

[0044] 3, 4 and 8, the through-hole 413 is formed in a cylindrical body, the inner wall of the through-hole 413 is provided with an internal thread 414, and the upper outer wall of the movable column 42 is provided with an external thread 421. The movable base 41 and the movable column 42 are helically connected by the external thread 421 and the internal thread 414, so that when the movable base 41 rotates clockwise, the movable column 42 rises, and when the movable base 41 rotates counterclockwise, the movable column 42 descends. In this embodiment, the bottom cover 2 moves downward due to the pressing action of the movable column 42, thereby moving the sealing ring 3 downward. Of course, the gravity of the bottom cover 2 itself also plays an auxiliary role in moving the bottom cover 2 downward.

[0045] The second and third embodiments share the principle of achieving lifting or not lifting by the relative movement of an inclined slope. Specifically, the movable base 41 has two symmetrical slopes 411 around the circumference of the through-bore 413. A horizontal cross bar 422 is attached to the tip of the movable column 42, and the bottom walls of both ends of the cross bar 422 are positioned on the slopes of the slopes 411. The movable base 41 moves to move the cross bar 422 relatively along the slopes 411, allowing the movable column 42 to rise or fall accordingly. During this relative movement, the cross bar 422 is only lifted as the height of the slopes 411 rises, and is not lowered as the height of the slopes 411 decreases. The horizontal bar 422 can only be lowered by the gravitational force of the movable column 42 and bottom cover 2 or the elastic force of the spring A102. To facilitate the start and stop of relative motion, a position limiting wall 4111 is provided adjacent to the bottom end of the slope 411, which can abut against and limit the position of the movement of the cross bar 422, and a downwardly recessed groove 4112 is provided at the tip of the slope 411, so that the cross bar 422 can enter the groove 4112 to form a position limit and stop its movement without the action of external force, but can leave the position limit of the groove 4112 and continue to move on the slope 411 with the action of external force. A stopper wall A412 having a height greater than that of the slope 411 is provided adjacent to the outside of the slope 411 to limit the displacement of the cross bar 422 in the longitudinal direction of the cross bar 422.

[0046] The specific differences between the second and third embodiments are as follows:

[0047] In the second embodiment, a rotational method is used to realize relative movement on the slope 411. Specifically, as shown in Figures 1, 2, 5 to 7, and 9 to 20, the movable seat 41 is circular, the through hole is located at the center of the base cover 1, and the two slopes 411 are spirally arranged symmetrically around the through hole. The slope of the slope 411 gradually descends from a high position in a clockwise direction. When the movable seat 41 rotates clockwise, the gradient gradually increases, the cross bar 422 is lifted, and the movable column 42 rises accordingly. When the movable seat 41 rotates counterclockwise, the gradient gradually decreases, and the movable column 42 descends due to the gravitational effect of the bottom cover 2 or the elastic force of the spring A102.

[0048] In the second embodiment, to facilitate rotation of the movable seat 41, a top cover A5 is provided that is fixedly connected to the movable seat 41, as shown in Figure 11. Both the top cover A5 and the movable seat 41 are provided inside the base cover 1 and are rotatable relative to the base cover 1, so that when the top cover A5 is rotated, the movable seat 41 rotates synchronously. The top cover A5 is provided inside the base cover 1 and can be of an appropriate size that is easy to grip. In this installation, the external shape of the base cover 1 does not affect the movement of the top cover A5, so the sealed tank can be formed into various shapes, such as circular, rectangular, or square. To facilitate production and processing, as shown in Figures 12, 19, and 20, the top cover A5 is made of a plastic material, with a first vertical convex ridge 52 formed on the inner wall of the top cover A5, a vertical guide groove 415 formed in the outer wall of the movable base 41, a ring-shaped second convex ridge 53 formed horizontally at the bottom end of the inner wall of the top cover A5, and a ring-shaped position limiting groove 416 formed in the bottom end of the outer wall of the movable base 41. The first convex ridge 52 is inserted from top to bottom into the guide groove 415 to limit its position in a horizontal position, and after the top cover A5 expands due to plastic action, the second convex ridge 53 is limited in position by the position limiting groove 416 to limit its vertical position. To make operation of the top cover A5 more labor-saving, a lever 51 is horizontally formed on the outer edge of the top cover A5 to rotate the top cover A5.

[0049] In the second embodiment, a different top cover shape can be adopted to facilitate the rotation of the movable base 41. As shown in Figures 13 to 18, the sealed tank is cylindrical, and a top cover B6 is provided on the outside of the base cover 1, locking and rotatable relative to the base cover 1. When the top cover B6 is rotated, the movable base 41 rotates synchronously. This can be understood as the diameter of the movable base 41 being expanded beyond the base cover 1 via the top cover B6. This allows the top cover B6 to be rotated by covering it with the palm of the hand and applying fingers to the outer edge of the top cover B6. This method uses only circular sealed tanks. In production, the top cover B6 and the movable base 41 can be integrally molded or fixedly connected via a locking block 91 and a locking hole 92, depending on the manufacturing process. As shown in Figure 16, The locking blocks 91 are provided on the outer wall of the movable base 41, and the locking holes 92 are provided on the central inner wall of the top cover B6 and open to the bottom end. The locking blocks 91 are positioned within the locking holes 92 to securely connect the movable base 41 and the top cover B6. Preferably, there are four pairs of locking blocks 91 and locking holes 92. To ensure stability during the rotation of the top cover B6, the circumferential surface of the top cover B6 is provided with a number of spaced arc-shaped grooves 61. The top surface of the base cover 1 is provided with a number of limiting posts 15 equal to the number of arc-shaped grooves 61. The limiting posts 15 are positioned within the arc-shaped grooves 61 to allow relative rotation as the top cover B6 rotates. Preferably, there are three arc-shaped grooves 61. In addition to this configuration, to improve the appearance of the product, as shown in Figure 18, a top cover 7 is provided, which is provided on the upper surface of the top cover B6 to cover internal parts such as the movable seat 41 and the arc groove 61, and the top cover 7 and the top cover B6 can be molded as a single unit, or can be engaged and fixed to the edge of the top cover B6 and / or the position limiting column 15.

[0050] 21 to 32, the movable base 41 is rectangular, with two slopes 411 arranged parallel to each other on either side of the through-hole. The slopes 411 slope from high to low from left to right, with the movable base 41 moving linearly to the right, the crossbar 422 being raised to raise the movable column 42, the movable base 41 moving linearly to the left, and the movable column 42 descending. The left-right linear movement of the movable base 41 brings the bottom cover 2 and the base cover 1 closer to or farther apart from each other without affecting the shape of the outer edge of the base cover 1. Therefore, the sealed tank can be configured in various shapes, such as circular, rectangular, and square. Although the drawings only show a rectangular shape, this still applies to the structures and connections in the other embodiments.

[0051] In the third embodiment, to ensure the stability of the movement of the movable seat 41, left-right rails 17 are provided on the top surface of the base cover 1, and the outer walls of both the upper and lower sides of the movable seat 41 abut against the inner walls of the rails 17, restricting the position of the movable seat 41 within the rails 17 and allowing it to move left and right along the rails 17. To further facilitate the movement of the movable seat 41, a top cover C108 is provided that is integrally formed with or fixedly connected to the movable seat 41. The top cover C108 is attached to the base cover 1 and can move left and right to synchronously move the movable seat 41, the area of ​​the top cover C108 being larger than that of the movable seat 41 but smaller than that of the base cover 1. This ensures that even if the force-receiving area acting on the movable seat 41 is increased, the top cover C108 will not exceed the base cover 1 during movement. Preferably, the connection between the top cover C108 and the movable seat 41 is such that, as shown in FIG. 27, at least two stopper walls B1081 extending downward are provided on the underside of the top cover C108, one of which abuts against the outer wall of the left side of the movable seat 41, and the other of which abuts against the outer wall of the right side of the movable seat 41. This allows the movable seat 41 to be constantly held midway between the two stopper walls B1081, enabling the top cover C108 to be pushed synchronously against the movable seat 41. For ease of operation, the top cover C108 is provided with a grip 1082 for gripping and moving the top cover C108 with fingers. The grip 1082 may be a variety of conventional structures, such as a knob or a protrusion, and preferably, the grip 1082 is provided as a recessed groove recessed downward at the top of the top cover C108.

[0052] In the third embodiment, as shown in FIGS. 26 and 27, there is one movable assembly 4, and the through-hole 14 is located at the center of the base cover 1. Alternatively, multiple movable assemblies 4 may be provided. When two movable assemblies 4 are provided, as shown in FIG. 31, two through-holes 14 are provided. In this case, an upward-facing fixed post 104 is provided at the center of the bottom cover 2, and a spring B103 is fitted into the fixed post 104. The upper end of the fixed post 104 is spaced from the base cover 1 so as not to impede movement between the base cover 1 and the bottom cover 2. An annular ring B105 is provided at the center of the bottom cover 2 to limit the rattle of the spring B103. The upper end of the spring B103 abuts the bottom surface of the base cover 1 and the lower end abuts the top surface of the bottom cover 2, and the function of the spring B103 is the same as that of the spring A102. This central installation configuration enhances the stability of the relative movement between the base cover 1 and the bottom cover 2. As shown in FIG. 32, when there are four sets of movable assemblies 4, the results of parts such as the through holes 14 are the same as when there are two sets of movable assemblies 4, but in this case, the four movable seats 41 can be integrally mounted on the same flat plate to enhance the uniformity of movement.

[0053] From the above, the above-described embodiment achieves the following technical effects: After the bottom cover is moved up to seal the sealed tank, the sealed tank isolates the inside from the outside. At this time, the pressure inside and outside the tank is the same. The movable assembly can continue to move the bottom cover up, increasing the volume of the tank body. The pressure inside the tank body is lower than the outside, and the original moisture and oxygen inside the tank body are reduced within a unit volume, forming a certain degree of vacuum, which effectively inhibits the survival of internal microorganisms and effectively prevents preservation, mold, and moisture for food and other items. Furthermore, the negative pressure created after the sealed tank is sealed makes it difficult for the bottom cover to fall off and can be easily removed after the sealed tank is released, making it easy to use. Of course, the negative pressure vacuum in the sealed tank is relative to the conventional atmospheric pressure, and the degree of negative pressure vacuum depends on the stroke of the bottom cover's up and down movement, the tank volume, and the pressure-resistant capacity of each component of the sealed tank. However, the technical solution described in this invention, when installed, achieves superior technical effects compared to the prior art.

[0054] The above are only exemplary embodiments of the present invention, and are not intended to limit the protection scope of the present invention, which is determined by the appended claims. [Explanation of symbols]

[0055] 1 Base lid 11 Outer edge A 12 Lower margin A 121 Slope 13 Lower edge B 14 Through holes 15 Position restriction pillar 16 Lower edge C 17 Rail 2 Bottom lid 21 Upper margin 22 Annular Ring A 23 Outer edge groove 3 sealing ring 31 Inner ring 32 outer ring 4 Moving Assembly 41 Movable seat 411 Slope 4111 Position Restriction Wall 4112 Groove 412 Stopper Wall A 413 Through-hole 414 Internal thread 415 Guide groove 416 Position limiting groove 42 Movable column 421 Male thread 422 horizontal bar 5 Cap A 51 Lever 52 First convex ridge 53 Second convex ridge 6 Cap B 61 Arc groove 108 Cap C 1081 Stopper Wall B 1082 Gripping part 7 Top cover 8 Tank body 81 Position Restriction Platform 91 Locking Block 92 Locking hole 102 Spring A 103 Spring B 104 Fixed column 105 Annular Ring B X border

Claims

1. A sealed tank comprising a base cover and a bottom cover spaced apart from each other in the vertical direction, a sealing ring provided on the circumferential outer edge of the bottom cover, and a tank body having an open upper end, wherein the bottom cover is provided at the inner upper end of the tank body, and the base cover engages to cover the open opening of the tank body, The outer edge of the base lid is defined as an outer edge A in the horizontal direction, and a lower edge A is defined inside the outer edge A and extending downward from the base lid, and the lower edge A is adjacent to the inner wall of the tank body, the sealing ring is an elastic ring, and includes an inner ring connected to the circumferential outer edge of the bottom cover, and an outer ring disposed on the outer wall of the lower edge A, the outer ring being higher than the inner ring in a horizontal position; The movable assembly further includes a movable seat provided on an upper surface of the base cover and a movable column fixedly connected to the bottom cover, the base cover is provided with a through-hole, a through-cavity is provided in the center of the movable seat, the movable column passes through the through-hole and the through-cavity, and the movable assembly can move the bottom cover closer to and away from the base cover by relative movement, a sealing ring synchronously ascending to move the outer ring upward until it closes the gap between the outer edge A and the inner wall of the tank body, thereby forming a seal; the bottom cover continues to ascend to make the air density inside the tank body lower than that of the outside, thereby generating a negative pressure; the base cover is fastened and sealed to the tank body; the movable assembly moves in the opposite direction; the bottom cover moves downward by its own gravity and / or the pressing action of the movable column; the sealing ring synchronously descending to move the outer ring downward so as not to close the gap between the outer edge A and the inner wall of the tank body;

2. 2. The sealed tank according to claim 1, wherein an outer peripheral groove is provided on the circumferential outer edge of the bottom cover, the outer peripheral groove being an annular groove that opens outward, the minimum diameter of the inner ring is smaller than the maximum diameter of the outer peripheral groove, and after the sealing ring is expanded under a force, the inner ring is stretched and fitted into the outer peripheral groove to form a fastening.

3. The sealed tank according to claim 2, further comprising a spring A fitted to the outside of the movable column, wherein the upper end of the spring A abuts against the bottom surface of the base lid and the lower end abuts against the top surface of the bottom lid, separating the bottom lid from the base lid in a natural state, and the lifting of the bottom lid compresses the spring A to bring it closer to the base lid.

4. 4. The sealed tank according to claim 3, wherein the lower end of the lower edge A is formed as a slope sloping from the outside to the inside, and the outer ring is disposed on the slope and is movable up and down along the slope direction.

5. The sealed tank according to claim 4, characterized in that the base cover further has a lower edge B extending downward, and the bottom cover has an upper edge extending upward, the upper edge being fitted outside the lower edge B.

6. The sealed tank according to claim 5, characterized in that the base lid further includes a lower edge C parallel to the lower edge A, the lower edge C being located outside the outer edge A, an opening in the side wall of the tank body is accommodated between the lower edge A and the lower edge C, a protruding position limiting base is provided on the upper side of the outer wall of the tank body, and a lower end of the lower edge C can abut against an upper surface of the position limiting base.

7. 4. The sealed tank according to claim 3, wherein a protruding annular ring A is provided on the top surface of the bottom cover, and the spring A is restricted in position within the annular ring A to prevent rattle.

8. 4. The sealed tank according to claim 3, wherein the through cavity is formed in a cylindrical body, an inner wall of the through cavity is provided with a female thread, an outer wall of the upper end of the movable column is provided with a male thread, the movable seat and the movable column are helically connected by the male thread and the female thread, and when the movable seat rotates clockwise, the movable column rises, and when the movable seat rotates counterclockwise, the movable column descends.

9. 4. The sealed tank according to claim 3, wherein the movable seat has two symmetrical slopes on the outer periphery of the through cavity, a horizontal bar is provided at the tip of the movable column, and bottom walls at both ends of the horizontal bar are arranged on the sloped surfaces of the slopes, and the movable seat moves to move the horizontal bar relatively on the slopes, and the movable column can rise or fall accordingly.

10. 10. The sealed tank according to claim 9, wherein a position limiting wall is provided adjacent to the bottom end of the slope of the slope, the position limiting wall can abut against and limit the position of the movement of the cross bar, and a downwardly recessed groove is provided at the tip of the slope of the slope, so that the cross bar can enter the groove to form a position limit and stop its movement without the action of an external force, but can leave the position limit of the groove and continue to move on the slope when the action of an external force is applied.

11. The sealed tank according to claim 10, characterized in that a stopper wall A having a height greater than the height of the slope is provided adjacent to the outside of the slope, and the stopper wall A limits the displacement of the cross bar along its longitudinal direction.

12. The sealed tank according to claim 9, characterized in that the movable seat is circular, the through hole is provided at the center of the base cover, the two slopes are spirally provided symmetrically around the through hole, the slopes of the slopes are provided so as to gradually descend from a high position in a clockwise direction, and when the movable seat rotates clockwise, the movable column rises accordingly, and when the movable seat rotates counterclockwise, the movable column descends accordingly.

13. 13. The sealed tank according to claim 12, further comprising a top cover A fixedly connected to the movable seat, wherein the top cover A and the movable seat are both disposed inside the base cover and are rotatable relative to the base cover, and when the top cover A is rotated, the movable seat rotates synchronously.

14. 14. The sealed tank according to claim 13, wherein the top cover (A) is made of a plastic material, the inner wall of the top cover (A) is provided with a first vertical convex ridge, the outer wall of the movable seat is provided with a vertical guide groove, the bottom end of the inner wall of the top cover (A) is provided with a second horizontal annular convex ridge, and the bottom end of the outer wall of the movable seat is provided with an annular position limiting groove.

15. 15. The sealed tank according to claim 14, wherein a lever for rotating the top cover A is horizontally provided on the outer edge of the top cover A.

16. 13. The sealed tank according to claim 12, wherein the sealed tank is cylindrical in shape and further comprises a top cover B that is engaged and covered on the outside of the base cover and is rotatable relative to the base cover, and when the top cover B is rotated, the movable seat rotates synchronously.

17. 17. The sealed tank according to claim 16, wherein the top cover B is integrally formed with the movable seat or is fixedly connected to a locking block via a locking hole.

18. The sealed tank of claim 17, characterized in that the top cover (B) has a surface circumference with a plurality of spaced arcuate grooves, and the upper surface of the base cover has position limiting posts of the same number as the arcuate grooves, the position limiting posts being restricted within the arcuate grooves and being capable of relative rotation as the top cover (B) rotates.

19. 19. The sealed tank according to claim 18, further comprising a top cover provided on the top surface of the top cover (B).

20. The sealed tank according to claim 19, characterized in that the top cover is engaged with the edge of the top lid (B) and / or the position limiting post, or is integrally formed with the top lid (B).

21. The sealed tank according to claim 9, characterized in that the movable seat is rectangular, the two slopes are provided on both sides of the through hole in the left-right direction and parallel to each other, the slopes have a high slope that gradually descends from left to right, the movable seat moves linearly to the right, the movable column rises, the movable seat moves linearly to the left, and the movable column descends.

22. 22. The sealed tank according to claim 21, wherein the movable assemblies are provided in a set, and the through-hole is provided in the center of the base cover.

23. The sealed tank according to claim 21, characterized in that the movable assemblies are provided in a plurality of sets, and the plurality of sets of movable assemblies are provided integrally or separately, and together form a rectangular outer shape.

24. 23. The sealed tank according to claim 22, wherein a rail is further provided on the upper surface of the base cover in the left-right direction, and the movable seat is restricted in position within the rail and is movable left and right along the rail.

25. 25. The sealed tank according to claim 24, further comprising a top cover C integrally formed with or fixedly connected to the movable seat, the top cover C being attached to the base cover and capable of moving left and right to move the movable seat synchronously, and the area of ​​the top cover C being larger than that of the movable seat and smaller than that of the base cover.

26. The sealed tank according to claim 25, characterized in that at least two stopper walls B extending downward are provided on the underside of the top cover C, one stopper wall B abutting against the outer wall of the left side edge of the movable seat, and the other stopper wall B abutting against the outer wall of the right side edge of the movable seat.

27. 27. The sealed tank according to claim 26, wherein the top cover C is provided with a grip portion for gripping and moving the top cover C with fingers.

28. 24. The sealed tank of claim 23, further comprising an upward fixed pillar provided at the center of the bottom cover, wherein a spring B is fitted into the fixed pillar, the upper end of the spring B abutting the bottom surface of the base cover and the lower end abutting the top surface of the bottom cover, and the upper end of the fixed pillar is separated from the base cover so as not to hinder movement between the base cover and the bottom cover.

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