CN210503866U - Sealing structure of storage tank cover and storage tank - Google Patents

Abstract

The utility model relates to a storing utensil technical field, and a seal structure of storing cover is disclosed, including the lid subassembly, the lid subassembly includes the upper cover, well lid and lower cover, upper cover and lower cover fixed connection, well lid activity sets up between upper cover and lower cover, the middle part of upper cover is provided with first mounting groove, the inside joint of first mounting groove has the button, the below fixedly connected with discount of button, cover down and be provided with the on-off mechanism corresponding with the discount, the circumference joint of lower cover has the sealing washer of bowl form, the sealing washer opening of bowl form makes progress, the bottom fixedly connected with of well lid supports tight ring, it is corresponding with the top inner wall of sealing washer to support the bottom of tight ring, be provided with elastic support mechanism between well lid and the lower cover, the bottom of first mounting groove articulates there is climbing mechanism. The utility model discloses can realize the sealed and sealed relieving to the jar body through the mode of pressing the button, operating means is simple, and is sealed respond well.

Description

Sealing structure of storage tank cover and storage tank

Technical Field

The utility model relates to a storing utensil technical field especially relates to a seal structure and storing jar of storing cover.

Background

Glass, the domestic kitchen storing jar of food material is preserved in being used for of plastic material, eat the material, the cover of its sealed jar mouth all generally adopts the sealed jar mouth of rotation type lid, or adopt the direct pressure of bottle stopper formula lid to seal the jar mouth on the storing jar mouth, these jar mouthful lids are all more troublesome during operation, it is difficult or take out the cover strenuous to cause to open the lid easily, and sealed effect is also relatively poor, it is sealed after depositing a period often to appear food in the jar, steam appears, the moisture regain, go mildy and rot scheduling problem, lead to food to eat the material rotten, take place when the circumstances such as the waste of the material of food is caused. Therefore, a storage tank cover sealing structure which is simple, easy and convenient to open and good in sealing is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the lid is difficult to open or the lid is hard to take out in the prior art, and the sealing effect is relatively poor, and after food is stored for a period in the jar in a sealing way, steam appears, the moisture regain, the problem that mildenes and rot often appears, and the seal structure and the storage jar of a storage jar lid that provide.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a sealing structure of a storage tank cover comprises a cover body assembly, wherein the cover body assembly comprises an upper cover, a middle cover and a lower cover, the upper cover and the lower cover are fixedly connected, the middle cover is movably arranged between the upper cover and the lower cover, a first mounting groove is arranged in the middle of the upper cover, a button is clamped in the first mounting groove, a fastening head is fixedly connected below the button, a switch mechanism corresponding to the fastening head is arranged on the lower cover, a bowl-shaped sealing ring is clamped in the circumferential direction of the lower cover, the opening of the bowl-shaped sealing ring is upward, a tightening ring is arranged at the bottom of the circumference of the middle cover, the bottom end of the tightening ring corresponds to the inner wall of the top of the sealing ring, an elastic supporting mechanism is arranged between the middle cover and the lower cover, a jacking mechanism is hinged to the bottom of the first mounting groove, and a through hole matched with the jacking mechanism is formed in the bottom of the first, the jacking mechanism penetrates through the through hole, the top end of the jacking mechanism is abutted against the inner top of the button, and the bottom end of the jacking mechanism is abutted against the middle cover.

Further, a plurality of screw via holes have been seted up to the tank bottom of first mounting groove, the second mounting groove has been seted up at the middle part of well lid, the tank bottom of second mounting groove is seted up and is kept away a hole with the corresponding first of screw via hole, and keeps away a hole with the corresponding second of through-hole, one side of lower cover that is close to well lid is formed and is had the screw post corresponding with the first hole of keeping away, first guiding hole has still been seted up to the tank bottom of second mounting groove, the lower surface of upper cover is formed and is had the guide bar corresponding with first guiding hole, cover down and take shape and have the stand bar assorted stand pipe.

Further, the switch mechanism comprises a clamping column, a guide column and a fastening mechanism, wherein the clamping column and the guide column are hollow columns with openings at the tops, clamping holes are formed in the side walls of the clamping column, clamping blocks matched with the clamping holes are fixedly connected to the outer wall of the guide column, the guide column is clamped in the clamping column through the clamping blocks and the clamping holes, a vertical first guide groove is formed in the side wall of one side of the guide column, a hook-shaped second guide groove is formed in the side wall of the other side of the guide column, a guide block is formed in the inner side wall, the top surface of the guide block is an inclined surface, the second guide groove penetrates through the guide block and the side wall of the guide column, the fastening mechanism comprises a clamping jaw, a rocker arm, a retainer, a second spring and a limiting column, the rocker arm is flat, a half-moon-shaped inserting shaft is formed in the end portion of one side, and a clamping block is formed in the other end portion of the, the clamping device is characterized in that the holder is provided with half-moon-shaped connecting holes corresponding to the inserting shaft, the inserting shaft is movably connected to the holder through the half-moon-shaped connecting holes, one surface of the holder corresponding to the first guide groove is provided with two limiting protrusions, the limiting protrusions are positioned in the first guide groove, the clamping block moves in the guide column through the guide of the guide block and the second guide groove, the holder is a hollow cylinder, the number of the clamping jaws is two, the bottom ends of the two clamping jaws are respectively and correspondingly elastically connected with the top end of the holder to form a pincerlike corresponding structure, the top ends of the two clamping jaws are respectively provided with a clamping block, the outer wall of each clamping block is provided with an arc-shaped surface corresponding to the top opening of the guide column, the bottom end of the buckle head is provided with a clamping groove corresponding to the clamping block, the limiting column is formed at the inner bottom of the guide column and fixedly connected with the bottom of the, and the top part penetrates into the inside of the retainer to be abutted against the arc surface of the inserting shaft.

Further, climbing mechanism is including two runing rest that crisscross setting, the top of runing rest is provided with the end, and the bottom is provided with down the end, it has the pivot to take shape on the outer wall of end down, the tank bottom of first mounting groove takes shape there is articulated seat, the runing rest articulates the inside at first mounting groove through pivot and articulated seat, it offsets with the interior top of button to go up the end, the end offsets with well lid down.

Furthermore, the elastic supporting mechanism is a first spring, the top of the first spring abuts against the middle cover, and the bottom of the first spring abuts against the lower cover.

Furthermore, a plurality of limiting pieces and guide pieces are formed at the bottom of the button, limiting steps are arranged on the outer wall of the bottom end of each limiting piece, and limiting holes and second guide holes corresponding to the limiting pieces and the guide pieces are formed in the groove wall of the first mounting groove.

The utility model also provides a storing jar with above storing cover, which comprises a tank body, the jar mouth department at the jar body is detained to the lid subassembly, the bottom cover of the jar body is equipped with the antiskid circle.

Compared with the prior art, the utility model provides a seal structure and storing jar of storing cover possesses following beneficial effect:

1. the sealing structure of the storage tank cover and the storage tank are provided with an upper cover, a middle cover, a lower cover and a button which are provided with a jacking mechanism, an elastic supporting mechanism, a button head and a switch mechanism, the button and the lower cover can be connected by utilizing the button head and the switch mechanism, at the moment, the middle cover is pressed towards the lower cover, so that the sealing ring is pressed down and extruded to the inner wall of the tank body by the abutting ring, thereby realizing good sealing of the tank body, when the lid subassembly is taken off at needs, also only need press the button, remove the chucking relation between discount and the on-off mechanism and can be under elastic support mechanism's effect, will well lid and sealing washer part, this moment under climbing mechanism's effect, the button is by jack-up, the discount leaves on-off mechanism, can easily take off the lid subassembly from the jar body afterwards, jar body sealed and the removal of encapsulated situation, all be simple press the button can, convenient operation, and sealed effectual.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can be effectual the realization to the sealed of the jar body, and easy operation avoids the food in the jar body to regain the tide or milden and rot.

Drawings

Fig. 1 is a schematic structural view of a sealing structure of a storage tank cover and a storage tank provided by the present invention;

fig. 2 is a schematic view of a sealing structure of a lid of a storage tank and a partial structure of the storage tank in an unsealed state;

fig. 3 is a partial structural schematic view of a sealing structure of a storage tank cover and a sealing state of the storage tank according to the present invention;

FIG. 4 is a schematic view of a partial structural connection of a seal structure and a cover assembly of a storage tank cover according to the present invention;

fig. 5 is a schematic structural view of an upper cover of a sealing structure of a storage tank cover according to the present invention;

fig. 6 is a schematic structural view of a middle cap of a sealing structure of a storage cap according to the present invention;

fig. 7 is a schematic structural view of a lower cover of a sealing structure of a storage tank cover according to the present invention;

fig. 8 is a schematic structural view of a non-sealing state of a sealing structure of a storage tank cover according to the present invention;

fig. 9 is a schematic structural view of a sealing state of a sealing structure of a storage tank cover according to the present invention;

FIG. 10 is a schematic view of a portion of the closure mechanism of the seal structure of a storage tank cover in accordance with the present invention;

FIG. 11 is a schematic front view of the structure of FIG. 10 taken along line A-A;

fig. 12 is a schematic structural view of a rocker arm of a storage tank cover according to the present invention.

In the figure: 1 upper cover, 2 middle cover, 3 lower cover, 4 buttons, 5 button heads, 6 sealing rings, 7 abutting rings, 8 through holes, 9 screw through holes, 10 screw columns, 11 clamping columns, 12 guide columns, 14 upper end heads, 15 lower end heads, 16 hinging seats, 17 first springs, 18 limiting sheets, 19 guide sheets, 20 limiting holes, 21 second guide holes, 22 tank bodies, 23 anti-slip rings, 24 first guide holes, 25 guide rods, 26 guide pipes, 27 clamping holes, 28 clamping blocks, 29 first guide grooves, 30 second guide grooves, 31 clamping jaws, 32 rocker arms, 33 retainers, 34 second springs, 35 limiting columns, 36 clamping blocks, 37 insertion shafts, 38 clamping blocks and 39 guide blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-12, a sealing structure of a storage tank cover comprises a cover body assembly, the cover body assembly comprises an upper cover 1, a middle cover 2 and a lower cover 3, the upper cover 1 and the lower cover 3 are fixedly connected, the middle cover 2 is movably arranged between the upper cover 1 and the lower cover 3, a first mounting groove is arranged in the middle of the upper cover 1, a button 4 is clamped in the first mounting groove, a buckle head 5 is fixedly connected below the button 4, a switch mechanism corresponding to the buckle head 5 is arranged on the lower cover 3, a bowl-shaped sealing ring 6 is clamped in the circumferential direction of the lower cover 3, an annular clamping groove is arranged in the circumferential direction of the lower cover 3, a horizontal part is arranged at the bottom end of the bowl-shaped sealing ring 6, the horizontal part is clamped in the clamping groove, as shown in fig. 4, the sealing ring 6 can be made of elastic soft material such as rubber or silicon rubber, the opening of the bowl-shaped sealing ring 6 is upward, a resisting ring 7 is, the bottom of the abutting ring 7 corresponds to the inner wall of the top of the sealing ring 6, an elastic supporting mechanism is arranged between the middle cover 2 and the lower cover 3, the bottom of the first mounting groove is hinged to a jacking mechanism, a through hole 8 matched with the jacking mechanism is formed in the bottom of the first mounting groove, the jacking mechanism penetrates through the through hole 8, the top end of the jacking mechanism is abutted to the inner top of the button 4, and the bottom end of the jacking mechanism is abutted to the middle cover 2.

A plurality of screw via holes 9 are formed in the bottom of the first mounting groove, a second mounting groove is formed in the middle of the middle cover 2, a first avoiding hole corresponding to the screw via hole 9 is formed in the bottom of the second mounting groove, a second avoiding hole corresponding to the through hole 8 is formed in the bottom of the second mounting groove, the first avoiding hole is used for allowing a screw to pass through, the second avoiding hole is smaller than the through hole 8 and used for allowing a switch mechanism to pass through, a screw column 10 corresponding to the first avoiding hole is formed in one side, close to the middle cover 2, of the lower cover 3, the upper cover 1 is fixedly connected with the lower cover 3 through the screw, the first avoiding hole and the screw column 10 are further formed in the bottom of the second mounting groove, a first guide hole 24 is further formed in the bottom of the upper cover 1, a guide rod 25 corresponding to the first guide hole 24 is formed in the lower surface of the upper cover 1, a guide pipe 26 matched with the guide rod 25 is formed in the lower cover 3.

The switch mechanism comprises a clamping column 11, a guide column 12 and a fastening mechanism, wherein the clamping column 11 and the guide column 12 are hollow columns with open tops, the side wall of the clamping column 11 is provided with a clamping hole 27, the outer wall of the guide column 12 is fixedly connected with a clamping block 28 matched with the clamping hole 27, the guide column 12 is clamped in the clamping column 11 through the clamping block 28 and the clamping hole 27, the side wall of one side of the guide column 12 is provided with a vertical first guide groove 29, the side wall of the other side is provided with a square-shaped second guide groove 30, a guide block 39 is formed on the inner side wall, the top surface of the guide block 39 is an inclined surface, the second guide groove 30 penetrates through the guide block 39 and the side wall of the guide column 12 as shown in figure 11, the fastening mechanism comprises a clamping jaw 31, a rocker arm 32, a retainer 33, a second spring 34 and a limiting column 35, the rocker arm 32 is flat, a half-moon-shaped inserting shaft 37 is formed at, a latch 36 (see fig. 12) is formed at the other end of the other side, the insert shaft 37 is arranged in such a way that when the bottom of the button head 5 is abutted against the insert shaft 37, the insert shaft 37 has a tendency to rotate, the latch 36 is urged to enter the second guide groove 30 in a 'V' -shape when the can lid is fastened, and when the can lid needs to leave the can body 22, the second guide groove 30 in the 'V' -shape is separated, the holder 33 is provided with a half-moon-shaped connecting hole corresponding to the insert shaft 37, wherein the half-moon-shaped connecting hole can ensure that the insert shaft 37 rotates a certain angle therein (see fig. 12), the insert shaft 37 is movably connected to the holder 33 through the half-moon-shaped connecting hole, a limit projection (not shown) is arranged on a surface of the holder 33 corresponding to the first guide groove 29, the limit projection is positioned in the first guide groove 29, the latch 36 moves inside the guide post 12 through the guide of the guide block 39 and the second guide, the retainer 33 is a hollow cylinder, the number of the claws 31 is two, the bottom ends of the two claws 31 are respectively and correspondingly connected with the top end of the retainer 33 in an elastic manner to form a pincer-shaped corresponding structure, the claws 31 can be integrally formed with the retainer 33 and are made of plastic materials with high toughness, the top ends of the two claws are respectively provided with a clamping block 38, the outer wall of the clamping block 38 is provided with an arc-shaped surface corresponding to the top opening of the guide post 12, the bottom end of the buckle head 5 is provided with a clamping groove corresponding to the clamping block 38, the limiting post 35 is formed at the inner bottom of the guide post 12, the bottom of the second spring 34 is sleeved outside the limiting post 35, the top of the second spring extends into the retainer 33 and abuts against the arc surface of the inserting shaft 37, the retainer 33 moves downwards when the buckle head 5 is pressed downwards through the first guide groove 29 and the second guide groove 30 arranged on the guide post 12, the retainer 33 moves downwards, and the clamping block 36 also moves downwards along the, at this time, the inserting shaft 37 has a tendency to rotate, so that the latch 36 finally enters the interior of the "√" shaped second guide groove 30, then the pressing down of the button head 5 is stopped, the holder 33 is lifted up under the action of the second spring 34, the latch 36 is latched at the inner top corner of the "√" shaped second guide groove 30, during the process of descending the holder 33, due to the guiding action of the top opening of the guide post 12 to the latch 31 and the clamping block 38, the two clamping blocks 38 move closer to each other and are latched in the latch groove on the button head 5, so as to realize the latching of the button head 5, when the button head 5 is pressed down again, the inserting shaft 37 drives the rocker 32 to swing by a certain angle, so that the latch 36 leaves the "√" shaped second guide groove 30, then when the button head 5 is released, the latch 36 moves out of the second guide groove 30 under the action of the second spring 34, so that the latch 31 moves out of the interior of the guide post 12 and opens, the fastening of the fastening head 5 is released.

Climbing mechanism is including two runing rest that crisscross set up, the top of runing rest is provided with end 14, and the bottom is provided with down end 15, it has the pivot to take shape on the outer wall of lower end 15, the tank bottom of first mounting groove is formed with articulated seat 16, the runing rest articulates in the inside of first mounting groove through pivot and articulated seat 16, it offsets with the interior top of button 4 to go up end 14, lower end 15 offsets with well lid 2, through-hole 8 is the dysmorphism hole here, otherwise can't guarantee two runing rest around articulated seat 16 pivoted normal clear.

The elastic supporting mechanism is a first spring 17, the top of the first spring 17 is abutted against the middle cover 2, the bottom of the first spring 17 is abutted against the lower cover 3, and the middle cover 2 is easier to reset due to the arrangement of the first spring 17 when the operation of the sealing state is released.

The bottom of the button 4 is provided with a plurality of limiting pieces 18 and guide pieces 19, the outer wall of the bottom end of each limiting piece 18 is provided with a limiting step, the groove wall of the first mounting groove is provided with a limiting hole 20 and a second guide hole 21 corresponding to the limiting pieces 18 and the guide pieces 19, the limiting pieces 18 and the guide pieces 19 are both arranged in an inclined mode, and the limiting pieces 18 with the limiting steps can prevent the button 4 from being separated from the upper cover 1 when the sealing state is assembled and released.

The utility model provides a storing jar with above storing cover, includes jar body 22, and lid subassembly is detained in jar mouth department of jar body 22, and the bottom cover of jar body 22 is equipped with antiskid circle 23, and the bottom of upper cover 1 among the lid subassembly corresponds with the top of jar body 22, and when using, the bottom of upper cover 1 offsets with the top of jar body 22.

In the utility model, when in use, if dry food or food materials need to be stored in the storage tank, the dry food or food materials are put into the tank body 22 of the storage tank, then the lower cover 3 of the storage tank cover sealing structure is put on the upper opening of the tank body 22 downwards, so that the lower cover 3 extends into the upper opening of the tank body 22 until the lower edge end face of the upper cover 1 contacts with the end face of the upper opening of the tank body 22, and at the moment, the cover body component of the storage tank cover sealing structure is already put in place;

if sealing is required, the button 4 is pressed, at this time, the upper end 14 of the rotating bracket in the button 4 is pressed downwards and rotates around the hinge seat 16 positioned on the bottom plane of the first installation groove of the upper cover 1, the two upper ends 14 gradually expand outwards, at this time, the lower end 15 of the rotating bracket rotates downwards due to the rotation of the rotating bracket, the tip end of the lower end 15 continuously presses down the groove bottom plane of the second installation groove of the middle cover 2, so that the middle cover 2 moves downwards, at this time, the first spring 17 is compressed, as the button 4 continues to move downwards, the button head 5 thereon also moves downwards, the abutting ring 7 on the lower edge end surface of the outer ring of the middle cover 2 presses down the upper ring edge of the sealing ring 6 clamped on the lower cover 3, as the abutting ring 7 on the middle cover 2 is positioned in the inwards inclined plane of the upper ring of the sealing ring 6, thus, as the sealing ring 6 is made of soft material with elasticity such as rubber or silicon rubber, therefore, the bowl mouth of the sealing ring 6 is squeezed and opened, the distance that the middle cover 2 moves downwards is increased along with the increase of the downward pressure of the button 4, the bowl mouth of the sealing ring 6 is squeezed and opened more greatly by the middle cover 2, the upper ring edge on the bowl mouth of the sealing ring 6 is squeezed and directly and tightly pressed on the inner wall of the can body 22, at this time, the cover body assembly of the storage can cover sealing structure tightly seals the can body 22, and the button head 5 on the button 4 is also pressed into the guide column 12 and is buckled by the claw 31 in the buckling mechanism, so that the sealing state between the cover body assembly and the can body 22 is kept, as shown in fig. 3 and fig. 9 (the guide column 12 and the internal structure thereof are not shown in fig. 3).

As shown in fig. 2 and 8 (the guide post 12 and its internal structure are not shown in fig. 2), when the cover assembly of the storage tank cover sealing structure is released from the tank body 22, the button 4 is pressed again in the sealing state, and the locking head 5 of the button 4 is released by the locking mechanism in the guide post 12, under the elastic force of the first spring 17, the lower plane of the middle cover 2 is moved upward by the upward elastic force of the first spring 17, the tip of the lower end head 15 is continuously pushed upward by the bottom plane of the second mounting groove of the middle cover 2, so that the upper end head 14 of the rotary bracket is rotated around the hinge seat 16 located on the bottom plane of the first mounting groove of the upper cover 1, the two upper end heads 14 are moved inward, thereby also pushing the button 4 to move upward, and because there is no pressure on the button 4, the lower end head 15 is a free end, at this time, the lower end head 15 of the rotary bracket is rotated upward by the rotation of the rotary bracket, the tip of the lower end head 15 continuously loosens the bottom plane of the second mounting groove to enable the middle cover 2 to move upwards, at this time, the button 4 continues to move upwards, the fastening head 5 on the button also moves upwards, the first spring 17 is gradually released to reduce the pressure on the middle cover 2, the upper ring edge of the sealing ring 6 fixed on the lower cover 3 is downwards pressed by the abutting ring 7 on the middle cover 2, the pressure is gradually reduced, because the abutting ring 7 is positioned in the inward inclined surface of the upper ring edge of the sealing ring 6, the sealing ring 6 is made of elastic soft materials such as rubber or silicon rubber, the bowl opening of the sealing ring 6 gradually shrinks to restore the original shape, the bowl opening of the sealing ring 6 is not pressed by the abutting ring 7 of the middle cover 2 any more along with the increase of the distance of the middle cover 2, the upper ring edge on the bowl opening of the sealing ring 6 gradually leaves the inner wall of the tank body 22, at this time, the cover body assembly of the storage tank cover sealing structure can not seal the tank body 22 any more, and the sealing ring 6 is completely separated from the inner wall of the can body 22, the cover assembly of the storage can cover sealing structure can be easily taken up by hands.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (7)

1. The sealing structure of the storage tank cover comprises a cover body assembly and is characterized in that the cover body assembly comprises an upper cover (1), a middle cover (2) and a lower cover (3), the upper cover (1) is fixedly connected with the lower cover (3), the middle cover (2) is movably arranged between the upper cover (1) and the lower cover (3), a first mounting groove is formed in the middle of the upper cover (1), a button (4) is clamped inside the first mounting groove, a buckle head (5) is fixedly connected below the button (4), a switch mechanism corresponding to the buckle head (5) is arranged on the lower cover (3), a bowl-shaped sealing ring (6) is clamped in the circumferential direction of the lower cover (3), the bowl-shaped sealing ring (6) is upwards opened, a resisting ring (7) is arranged at the bottom of the middle cover (2), and the bottom end of the resisting ring (7) corresponds to the inner wall of the top of the sealing ring (6), be provided with elastic support mechanism between well lid (2) and lower cover (3), the bottom of first mounting groove articulates there is climbing mechanism, just the bottom of first mounting groove seted up with climbing mechanism assorted through-hole (8), climbing mechanism runs through-hole (8), climbing mechanism's top offsets with the interior top of button (4), and the bottom offsets with well lid (2).

2. The sealing structure of the storage tank cover according to claim 1, wherein a plurality of screw through holes (9) are formed in the bottom of the first mounting groove, a second mounting groove is formed in the middle of the middle cover (2), a first avoiding hole corresponding to the screw through holes (9) and a second avoiding hole corresponding to the through hole (8) are formed in the bottom of the second mounting groove, a screw post (10) corresponding to the first avoiding hole is formed on one side of the lower cover (3) close to the middle cover (2), a first guide hole (24) is further formed in the bottom of the second mounting groove, a guide rod (25) corresponding to the first guide hole (24) is formed on the lower surface of the upper cover (1), and a guide pipe (26) matched with the guide rod (25) is formed on the lower cover (3).

3. The sealing structure of the storage tank cover according to claim 1, wherein the switch mechanism comprises a clamping column (11), a guide column (12) and a fastening mechanism, the clamping column (11) and the guide column (12) are hollow columns with open tops, a clamping hole (27) is formed in the side wall of the clamping column (11), a clamping block (28) matched with the clamping hole (27) is fixedly connected to the outer wall of the guide column (12), the guide column (12) is clamped in the clamping column (11) through the clamping block (28) and the clamping hole (27), a vertical first guide groove (29) is formed in the side wall of one side of the guide column (12), a second guide groove (30) in a V-shaped shape is formed in the side wall of the other side, a guide block (39) is formed in the inner side wall, and the top surface of the guide block (39) is an inclined surface, the lateral wall of guide block (39) and guide post (12) is run through in second guide way (30), straining device includes jack catch (31), rocking arm (32), holder (33), second spring (34) and spacing post (35), rocking arm (32) are the platykurtic, and the tip of one side is formed with axle (37) of inserting of semilune, and another tip of another side is formed with fixture block (36), set up the semilune connecting hole corresponding with axle (37) of inserting on holder (33), axle (37) are inserted through semilune connecting hole swing joint on holder (33), the one side that holder (33) and first guide way (29) correspond is equipped with spacing protruding, and spacing protruding department is in first guide way (29), fixture block (36) move inside guide post (12) through the direction of guide block (39) and second guide way (30), the cylinder that holder (33) were well expert, the quantity of jack catch (31) is two, two the bottom of jack catch (31) corresponds respectively with the top elastic connection of holder (33), forms pincerlike corresponding structure, two the top of jack catch (31) all is provided with clamp splice (38), the outer wall of clamp splice (38) is provided with the arcwall face corresponding with the open-top of guide post (12), the draw-in groove corresponding with clamp splice (38) has been seted up to the bottom of discount (5), the bottom of spacing post (35) is taken shape at the interior bottom of guide post (12), the bottom cover of second spring (34) is established in the outside of spacing post (35), and the inside that the top penetrated holder (33) offsets with the arc surface of inserting axle (37).

4. The sealing structure of the storage tank cover is characterized in that the jacking mechanism comprises two rotating supports which are arranged in a staggered mode, an upper end (14) is arranged at the top end of each rotating support, a lower end (15) is arranged at the bottom end of each rotating support, a rotating shaft is formed on the outer wall of each lower end (15), a hinge seat (16) is formed at the bottom of each first mounting groove, the rotating supports are hinged inside the first mounting grooves through the rotating shafts and the hinge seats (16), the upper ends (14) abut against the inner tops of the buttons (4), and the lower ends (15) abut against the middle cover (2).

5. The seal structure of a storage tank cover according to claim 1, wherein the elastic support mechanism is a first spring (17), the top of the first spring (17) abuts against the middle cover (2), and the bottom of the first spring (17) abuts against the lower cover (3).

6. The sealing structure of the storage tank cover according to claim 1, wherein a plurality of limiting pieces (18) and guiding pieces (19) are formed at the bottom of the button (4), a limiting step is arranged on the outer wall of the bottom end of each limiting piece (18), and a limiting hole (20) and a second guiding hole (21) corresponding to the limiting pieces (18) and the guiding pieces (19) are formed in the groove wall of the first mounting groove.

7. A canister having a canister lid according to any one of claims 1 to 6, comprising a body (22), wherein the lid assembly is fastened to the mouth of the body (22), and a non-slip ring (23) is provided around the bottom of the body (22).

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