EP2965816B1 - Reaction vessel with lid - Google Patents

Description

The invention relates to a reaction vessel with lid (hereinafter also "lid vessel") made of plastic for laboratory use.

Known plastic lidded containers for laboratory use have a tubular vessel having at the bottom a vessel bottom, at the top a vessel opening and below the vessel opening at the inside wall a sealing area. A lid having a lid bottom and a stopper protruding from the inside of the lid bottom is insertable through the vessel opening into a sealing position in the sealing area. The lid is sealed and held by the clamping force of the plug in the vessel. There are applications in which a sample liquid filled in the vessel is heated and has an increased vapor pressure. For example, in Polymerase Chain Reaction (PCR) technology, samples in lidded vessels are repeatedly heated to temperatures above 90 ° C. The clamping force of the plug shall be such as to ensure adequate vapor tightness and not to loosen the lid due to the increased vapor pressure. As a result, a great deal of effort is required to press the lid with the stopper in the vessel. To open the lid, the user must press firmly against the lower edge of a protruding edge of the lid bottom.

From the DE 34 02 276 . US 4,713,219 . EP 0 841 093 A2 . US 5,674,456 A and US 5,863,791 are lidding vessels of the type described above, in which the vessel and lid are integrally connected to each other via a hinge hinge pivotally. The lid has a locking hook protruding downwards from a laterally projecting lid flange, and the vessel has, in addition to the vessel opening, a locking cam engaged behind in the closed position by the locking hook. When closing the lid, the rigid locking hook snaps under elastic deformation the cover flange behind the locking cam, whereby the lid is secured in the closed position. To open the lid, the user must push up the lid flange so that it is bent upwards and the locking hook is released from the locking cam. For this purpose, locking hook and locking cam only a small overlap. Due to the low overlap, the locking hook can unintentionally release from the locking cam, for example, when the internal pressure in the vessel increases. When opening the lid, the locking hook can jerky release from the locking cam, which liquid sample can be sprayed from the vessel.

The WO 2012/083995 A1 and US 2012/328490 A1 describe a lidded vessel made of plastic for laboratory use with a tubular vessel having a bottom of the vessel bottom, above a vessel opening and below the vessel opening on the inner wall has a sealing area. The lidded vessel has a lid having a lid bottom and a stopper projecting from the inside of the lid bottom, which is insertable through the vessel opening into a sealing position in the sealing area. In addition, the lidded vessel has locking means for releasably locking the lid to the vessel. The locking means comprise at least one of the upper edge of the vessel radially outwardly projecting latching projection and at least one projecting from the underside of the lid bottom flexible and elastic tab on which at a distance from the lid bottom vertically below the connection of the tab to the lid bottom a locking edge is arranged which is snap-fit under the latching projection during insertion of the plug into the sealing area. From the tab is laterally outwardly a key, the latching of the locking edge with the locking projection by pressing down against the key can be canceled.

To close the lidded vessel, the stopper is inserted into the vessel opening and placed in sealing position in the sealing area. In this case, the locking edge slides over the latching projection, whereby the flexible tab is deflected slightly laterally outwards. Finally, the elastic tab pivots the locking edge under the lower edge of the locking projection, whereby the lid is locked to the vessel. To open the user presses against the underside of the button, whereby the flexible flap is pivoted outwards, the locking edge of the locking projection is released and the unlocked lid is moved out with the stopper from the vessel.

Although the lidded vessel certainly withstands higher internal pressure loads, larger operating forces do not have to be applied for closing and opening. The disadvantage, however, is that the opening of the vessel is unusual for the user, because it requires an unusual force in the vertical direction against the button below the lid bottom. If the user presses horizontally or slightly obliquely from below against the edge of the lid as in the case of conventional lidded containers, there is a risk that the locking elements will break off when the force is applied. For correct opening, the user must understand the functional principle of the lidded container or learn the correct operation of the key. The change from the long practiced handling is difficult. In addition, the one-hand operation is less user-friendly, since when holding the lid vessel with the fingers pushing up the button with the thumb is more difficult and the vessel must be held firm than pressing the thumb in approximately horizontal direction against the edge of the lid.

Based on this, the object of the invention is to provide a user-friendly lidded container made of plastic for laboratory use create, which can be closed and opened with little effort and safely closes.

The object is achieved by a lidded vessel with the features of claim 1. Advantageous embodiments of the lidded vessel are specified in subclaims. The lidded container according to the invention can be closed by inserting the lid with the stopper into the vessel opening and bringing it into a sealing position in the sealing area. For this purpose, the user can press in the usual way against the lid bottom. When closing the lid, the locking edge or an adjacent contour of the flexible and elastic tab slides over the locking projection and thereby the tab is deflected slightly laterally outwards. When the locking edge reaches the lower edge of the locking projection, it is pivoted by the tab under the underside of the locking projection. As a result, the lid is locked with the vessel, so that it is secured against accidental opening. Due to the flexibility of the tab, no appreciably greater force is required for closing the lid container than for closing conventional lid containers which have no latching. High closing forces can be avoided since the plug only has to be in the sealing position with a clamping force which ensures sufficient vapor-tightness. The locking of the locking edge with the locking projection secures the lid against unintentional opening at elevated internal pressure.

To open the lidded container, the user pushes from the side and from the bottom against the outside of the second lever. As a result, the second lever is pivoted with the upper end closer to the lid bottom. At the same time, the first lever is pivoted upward because the second lever is connected at the bottom to the first lever. In this case, the tab is pivoted away from the vessel to the outside, so that the locking edge of the locking projection dissolves or lifts off the locking projection. For this purpose, preferably the first lever and the second lever are rigid and rigidly interconnected. The locking devices can be designed so that the latching edge when swinging the tab outwardly so far released from the locking projection so far that the lid can be opened. For the direct release of the locking edge of the locking projection of the locking projection be sized accordingly short. Alternatively, the locking means are formed so that initially the downwardly pivoted first lever rests with the top down on the outer edge of the locking projection and on further pushing against the second lever on the outer edge slides outwards until the locking edge is released completely from the locking projection and the Lid can be opened. When the locking edge is released from the locking projection, the lid with the stopper is moved out of the vessel by further pressing against the second lever. Due to the low clamping force of the plug, the lid can be easily lifted after loosening the catch, without it suddenly jumping up and liquid is spilled or aerosols emerge.

By pressing against the second lever the unlatching of the locking devices is controlled specifically. In this way, an unintentional jerky release of the locking edge of the locking projection and a squirting of liquid sample can be avoided from the vessel. As with conventional lidded containers, the user may apply a substantially horizontal and slightly vertical force to the lid to open the lid. The second lever may be configured and arranged to replace the lid edge of a conventional lidded vessel against which the user presses to open. Thus, the user can operate the lidded container in the usual way and intuitively, without having to change over. In particular, he can easily close the lidded container with one hand and open. Destruction of the locking elements by incorrect operation is avoided. Further, it is possible to open the lid by pressing down against the first lever.

Lidded vessels according to the invention preferably have a capacity in the range of 1/10 ml to 100 ml. For example, they have a capacity 0.1, 0.5, 1, 1.5, 2, 5, 15 or 50 ml. The invention is particularly suitable for large capacity vessels (eg 5, 15 or 50 ml).

According to one embodiment, the second lever is inclined at least on the outside, starting from its connection to the first lever to the outside. This facilitates the application of a substantially horizontal and slightly upward force to the outside of the second lever. In addition, this favors the production of the lidded vessel in an injection mold with only two mold halves. Preferably, the second lever is inclined with the outside and the inside, starting from its connection with the first lever to the outside.

According to a further embodiment, the first lever is in the pivoted state, when the locking edge is released from the latching projection, with the upper side at the lower outer edge of the underside of the latching projection, so that the first lever on further pressing against the second lever with the upper side over the lower outer edge of the locking projection slides until the locking edge of the locking projection is released. This favors a secure locking, which can be solved specifically. For this purpose, the locking projection can be dimensioned accordingly.

According to a further embodiment, the second lever lies with its inner side at a distance from the first lever laterally on the latching projection, when the latching edge is latched to the latching projection, and the second lever is by pressing from the side against the outside of the second lever to the latching projection pivotable. By supporting the second lever on the locking projection of the force required for opening the lid is reduced and the lidded vessel is still easier to use.

According to a further embodiment, the latching projection is formed on a flange which at least partially surrounds the circumference of the upper outer edge of the vessel. The flange stabilizes the upper edge of the vessel. Preferably, the flange runs completely around the upper edge of the vessel.

According to one embodiment, the locking edge is arranged vertically below the connection of the tab to the lid bottom. This ensures that the tab for holding the lid on the vessel only has to transmit tensile forces. This promotes a particularly flexible design of the tab, whereby the forces required to close and open the lidded vessel can be further reduced.

According to a further embodiment, the locking edge is supported in locking position on a surface of the locking projection, which is directed tangentially to a radius about the connection of the tab to the lid bottom or in the outward direction of a tangent to the radius away is pivoted downwards. This ensures that the closed lid exerts only tensile forces on the tab. This favors a particularly flexible design of the tab and low closing and opening forces.

According to one embodiment, the latching projection on the outer edge above a radius and / or the tab or the first lever on the inner edge below a radius. As a result, the initial deflection of the tab when placing on the locking projection is facilitated.

According to a further embodiment, the latching projection and / or the tab on the inside adjacent to the locking edge on an outer and / or inner chamfer, so that the tab is increasingly deflected laterally during insertion of the plug into the vessel. As a result, the closing of the vessel is further facilitated.

According to a further embodiment, the second lever is connected to the outer end of the first lever. This design is space and material saving.

According to a further embodiment, the second lever is extended up to the level of connection of the tab to the lid bottom. This promotes a small amount of force for the opening of the lidded vessel.

According to one embodiment, the tab is connected to an outer lid edge and the tab is vertically aligned or inclined outwardly from its connection with the lid edge. As a result, the first and second levers are laterally offset with respect to the lid bottom. This is advantageous for producing the lidded container with an injection mold with two mold halves. Furthermore, this favors a large range of motion of the second lever, which can facilitate the release of the catch.

According to a further embodiment, the vessel on the circumference at least one cam on which the tab or the first lever is applied, when the locking edge is locked with the latching projection and / or the tab or the first lever at least one cam, which on the Vessel rests when the latching projection is locked with the locking edge. The cam prevents the latching devices from locking even more when pressed against the second lever. Preferably, two cams are arranged on both sides of a vertical plane through the second lever for uniform support.

According to a further embodiment, the locking edge of the lower edge of a recess of the tab. Alternatively, the locking edge is formed on a latching projection of the tab, which protrudes from the inside of the tab to the vessel.

According to a further embodiment, the tab has two lateral tab strips, which are connected at the top to the lid base and connected at the bottom to the first lever and between which the recess is present. The two tab strips ensure high flexibility of the tab. The first lever defines the recess from below, so that the inner upper edge of the first lever is also the locking edge.

According to another embodiment, the tab has a single tab strip which is connected at the top to the lid base and connected at the bottom to the first lever, which is wider than the tab strip, wherein at least one side of the tab strip projecting, inner upper edge of the first lever the Locking edge forms. In this embodiment, the first lever is locked with at least one laterally protruding from the tab strip inner upper edge under the locking projection of the vessel.

According to a further embodiment, lid and vessel are connected to each other via a hinge. In this embodiment, the lid is captively connected to the vessel. The lidded vessel can be opened and closed while pivoting the lid relative to the vessel. An alignment of the plug on the vessel opening is eliminated.

According to a further embodiment, the hinge is a band hinge, via which the vessel is integrally connected to the lid. The ribbon hinge may include one or more hinge bands that are at least partially flexible. The hinge hinge is similar to a living hinge but may be flexible over a longer range perpendicular to the pivoting direction. A hinge with at least one hinge strap, which is flexible in the longitudinal direction at least in one area, facilitates the insertion of the plug into the vessel opening of a cylindrical vessel, as it allows a compensation movement. By the one-piece connection of the vessel and lid on the hinge hinge the injection molding of the lid vessel is made possible in a single injection molding step. The lidded container can also be injected in one piece in several injection molding steps from a single or multiple plastics. Preferably, the lid bottom is connected via the hinge hinge with the upper edge of the vessel.

According to a further embodiment, a device for locking the lid in an open position is present next to the hinge. The device for locking can be configured as in the EP 0 841 093 A2 and US 5,863,791 or in the WO 2012/083995 A1 and US 2012/328490 A1 described.

According to a further embodiment, the vessel has, adjacent to the vessel opening, an insertion area for the stopper, which widens toward the upper edge of the vessel, and the sealing area below. As a result, the closing of the lid container is further facilitated.

According to a further embodiment, the plug is hollow cylindrical. As a result, the plug is particularly flexible, whereby the closing and opening of the lid vessel is further facilitated.

According to a further embodiment, the plug on the outer circumference has a circumferential sealing bead. As a result, the vapor-tightness of the lidded vessel is further improved.

The lidded container according to the invention is made of one or more plastics. According to a further embodiment, the lidded vessel as a whole made of one or more elastic plastics. In the manufacture of the lidded vessel made of one or more elastic plastics, the at least one tab is preferably more elastic than the lid and / or the vessel. This can be achieved by suitable shaping of the tab, in particular in that the tab is thinner than the lid and / or the vessel. Furthermore, this can be achieved by using a particularly elastic plastic for the tab. Preferably, the tab is so elastic that for closing and opening the lid is predominantly or exclusively the tab is elastically deformed. The first and second levers are preferably formed and / or made of such a plastic as to be rigid when acted upon by forces to be applied to the second lever for opening the lidded vessel.

According to a further embodiment, the lidded vessel is made of one or more polyolefins. Preferably, the lidded vessel is made of a polypropylene or a polyethylene. It is also possible to produce the lidded container with a stopper of different plastics, which has harder and softer segments, as in the US 2003/0102323 A1 described. The lidded container can be produced in particular by multi-component injection molding.

Fig. 1

ein Deckelgefäß im geöffneten Zustand in Seitenansicht;

Fig.2

dasselbe Deckelgefäß geöffnet in der Draufsicht;

Fig. 3

dasselbe Deckelgefäß in geschlossenem Zustand in Seitenansicht;

Fig. 4

dasselbe Deckelgefäß geschlossen in der Draufsicht;

Fig. 5

vergrößertes Detail V von Fig. 4;

Fig. 6

dasselbe geschlossene Deckelgefäß in einer vergrößerten Detailansicht von der Seite;

Fig. 7

dasselbe Deckelgefäß geschlossen in einem Vertikalschnitt;

Fig. 8

vergrößertes Detail VIII von Fig. 7;

Fig. 9

dasselbe Deckelgefäß beim Öffnen des Deckels in einem Vertikalschnitt;

Fig. 10

vergrößertes Detail X von Fig. 9;

Fig. 11

Verriegelungseinrichtungen desselben Deckelgefäßes beim Öffnen in einer vergrößerten Seitenansicht;

Fig. 12

ein weiteres Deckelgefäß mit Abstützung des zweiten Hebels am Rastvorsprung beim Öffnen des Deckels in einem Vertikalschnitt;

Fig. 13

vergrößertes Detail XIII von Fig. 12;

Fig. 14

dasselbe Deckelgefäß beim Öffnen des Deckels in einer vergrößerten Detailansicht von der Seite;

Fig. 15

ein weiteres Deckelgefäß mit Nocken außen am Gefäß im geöffneten Zustand in Seitenansicht;

Fig. 16

vergrößertes Detail XVI von Fig. 15;

Fig. 17

dasselbe Deckelgefäß geöffnet in der Draufsicht;

Fig. 18

vergrößertes Detail XVIII von Fig. 17;

Fig. 19

dasselbe Deckelgefäß geschlossen in einer vergrößerten Detailansicht von der Seite.

The invention will be explained in more detail with reference to the accompanying drawings with reference to embodiments. In the drawings show:

Fig. 1

a lidded vessel in the open state in side view;

Fig.2

the same lidded vessel opened in plan view;

Fig. 3

the same lidded vessel in closed state in side view;

Fig. 4

the same lidded vessel closed in plan view;

Fig. 5

enlarged detail V of Fig. 4 ;

Fig. 6

the same closed lidded vessel in an enlarged detail view from the side;

Fig. 7

the same lidded vessel closed in a vertical section;

Fig. 8

enlarged detail VIII of Fig. 7 ;

Fig. 9

the same lidded vessel when opening the lid in a vertical section;

Fig. 10

enlarged detail X of Fig. 9 ;

Fig. 11

Locking devices of the same lidded vessel when opening in an enlarged side view;

Fig. 12

another lidded vessel with support of the second lever on the locking projection when opening the lid in a vertical section;

Fig. 13

enlarged detail XIII of Fig. 12 ;

Fig. 14

the same lidded vessel when opening the lid in an enlarged detail view from the side;

Fig. 15

another lidded vessel with cams on the outside of the vessel in the open state in side view;

Fig. 16

enlarged detail XVI of Fig. 15 ;

Fig. 17

the same lidded vessel opened in plan view;

Fig. 18

enlarged detail XVIII of Fig. 17 ;

Fig. 19

the same lidded vessel closed in an enlarged detail view from the side.

In this application, the terms "top" and "bottom" and "top" and "bottom" and "vertical" and "horizontal" and related terms refer to the lidded vessel where the vessel is closed by the lid and the locking means lock the lid to the vessel with the tubular vessel oriented vertically, the bottom of the vessel down, and the top lid.

The lidded vessel 1.1 of FIGS. 1 to 11 has a tubular vessel 2 with a circular cross section, which has a hollow cylindrical portion 3 at the top and a conical portion 4 at the bottom. At the bottom of the vessel 2 has a cup-shaped bottom 5 and the top of a vessel opening 6. Under the vessel opening 6 is in the hollow cylindrical section 3, a conically tapering down insertion area 7 and below a circular cylindrical sealing area 8 (see. Fig. 7 ) available.

At the top of the vessel 2 has a circumferential, radially outwardly projecting flange 9.1 in the form of a circular disk. A peripheral region of the flange 9.1 serves as a latching projection 9.2. The flange 9.1 has a radius of 9.3 at the upper outer edge. The lower edge 9.4 is not provided with a radius, but has a sharp edge (see. Fig. 8 ).

Below the flange 9.1 is optionally arranged on the outer circumference of the vessel 2, a series of crenellated projections 10, which serve to support on the edge of a vessel holder.

The lidded vessel 1.1 has a lid 11 which has a lid bottom 12 and a stopper 13 projecting from the bottom of the lid 12. The plug 13 has a hollow cylindrical plug portion 13.1. At the lower end of the plug portion 13.1, it has a peripheral, outwardly projecting sealing bead 13.2 (see. Fig. 7 ).

The lid bottom 12 protrudes laterally beyond the stopper 13 also. The lid base 12 has two mutually opposite lid edges 12.1 and 12.2, which are arcuately curved outwards and two parallel, straight lid edges 12.3, 12.4 (see. Fig. 2 ).

The lid 11 is connected via a hinge band 14 with the vessel 2. One end of the hinge 14 is connected to the flange 9.1 and the other end to the lid edge 12.4. The locking projection 9.2 is arranged diametrically opposite the connection of the hinge band 14 to the flange 9.1.

From the bottom of the lid bottom are lid projections 15 before. Two arcuate lid projections 15.1, 15.2 extend along the arcuate lid edges. Two parallel, cam-like lid projections 15.3, 15.4 are arranged next to the hinge band 14 on the straight lid edge 12.4.

The lid projections 15 serve to support the lid 11 on the flange 9.1.

The lidded vessel 1.1 has locking devices 16 for releasably locking the lid 11 to the vessel 2.

The latching projection 9.2 is part of the locking devices 16.

In addition, the locking means 16 on a flexible and elastic tab 17 which is connected to the rectilinear edge of the cover 12.3 relative to the hinge band 14 (see. FIGS. 5 and 8 ). The tab 17 is connected at the bottom with a first lever 18 which extends parallel to the lid bottom 12 to the outside. The outer end of the first lever 18 is connected to an upwardly directed outer lever 19. The second lever 19 is inclined starting from its connection to the first lever 18 slightly outwards, so that an outer side 19.1 is inclined slightly downwards with the lidded container 1.1. The second lever 19 extends approximately to the lower edge of the lid bottom 12.

The tab 17 has two lateral tab strips 17.1, 17.2, between which a recess 20 is present. The tab strips 17.1, 17.2 are arranged near the ends of the lid edge 12.3. The first lever 18 is strip-shaped and extends from the tab strip 17.1 to the tab strip 17.2. The first lever 18 limits the recess 20 below. The inner, upper edge of the first lever 18 is a latching edge 21st

According to the first lever 18 and the second lever 19 is strip-shaped.

The first lever 18 has a radius 18.1 at the lower edge.

The second lever 19 has a radius 19.2 at the top of the inner edge.

The hinge band 14 is flexible. The tab 17 is also flexible. The levers 18, 19, however, are rigid. The plug 13 and / or the sealing area 8 are flexible and / or rigid. The remaining lidded vessel 2 is preferably rigid. The rigid and flexible properties are achieved by the design and / or wall thicknesses and / or materials of the respective parts.

The lidded vessel 1.1 is inserted into the in Fig. 1 and 2 shown, opened arrangements produced by injection molding. Due to the shape free of undercuts, the lidded container 1.1 can be produced by means of a simple injection molding tool which has only two mold halves, which can be moved apart for removal along an axis.

To close the lid 11, the user presses against the outside of the lid bottom 12, so that the lid 11 pivots about the hinge 14. The lid 11 enters the vessel opening 6 with the stopper 13, which is facilitated by the extended insertion area 7. Thereafter, the sealing bead 13.2 enters the sealing area 8. Here, the first lever 18 with the radius 18.1 hits the radius 9.3 of the locking projection 9.2. Upon further pressing the lid 11, the tab 17 is deflected laterally outwards. Because of the radii 9.3, 18.1 and the Flexibility of the tab 17 requires only a slightly increased effort.

When the latching edge 21 has reached the lower outer edge 9.4 of the latching projection 9.2, the elastic flap 17 springs towards the vessel 2 and the latching edge 21 on the first lever 18 engages under the latching projection 9.2 (cf. Fig. 3 to 8 ). As a result, the locking takes place and the lid 11 secured to the vessel 2.

To open the lid 11, the user presses against the outer side 19.1 of the second lever 19 (see. Fig. 9 to 11 ). The force is essentially horizontal, with a small upward force component. As a result, the second lever 19 is pivoted to the lid bottom 12 and the first lever 18 releases with the locking edge 21 from the locking projection 9.2. Further pressing against the second lever 19 causes the first lever 18 with the top on the lower outer edge of the locking projection 9.2 9.2 slides up until the locking edge 21 slides over the lower outer edge of the catch projection 9.2 9.4 and thus released from the locking projection 9.2. Further pressing against the second lever 19 causes the pivoting of the lid 11 in the open position (see. Fig. 1 and 2 ).

The user can thus operate the lidded vessel 1.1 substantially like a conventional lidded vessel.

The lidded vessel 1.2 of Fig. 12 to 14 differs from the lidded vessel 1.1 in that the locking projection 9.2 at the upper outer edge 9.5 has no radius, but a sharp edge. When the user presses against the second lever 19, this is supported with the inside at the upper outer edge 9.5 of the locking projection 9.2 (see. Fig. 13 ). This supports the fact that the Latching edge 21 from the locking projection 9.2 triggers and the top of the first lever 18 at the lower outer edge of the locking projection 9.2 9.2 slides up.

The lidded vessel 1.3 of 15 to 19 differs from the lidded vessel 1.1 in that the vessel 2 on the outside of the flange 9.1, two cams 22.1, 22.2, which are arranged on both sides of the locking projection 9.2. The cams 22.1, 22.2 are positioned so that the tab strips 17.1, 17.2 abut against the cams 22.1, 22.2 when the lidded vessel 1.2 is closed. This prevents jamming or deformation of the tab 17 when the user presses against the second lever 19 from above or off-center.

LIST OF REFERENCE NUMBERS

1.1, 1.2, 1.3

Deckelgefäß

2

vessel

3

hollow cylindrical section

4

conical section

5

ground

6

vessel opening

7

insertion

8th

sealing area

9.1

flange

9.2

catch projection

9.3

radius

9.4

lower outer edge

9.5

upper outer edge

10

head Start

11

cover

12

cover ground

12.1, 12.2

curved lid edges

12.3, 12.4

straight lid edges

13

Plug

13.1

hollow cylindrical plug section

13.2

sealing bead

14

strap hinge

15

cap projection

15.1, 15.2

arcuate lid projection

15.3, 15.4

Cam-like cover projection

16

locking devices

17

flap

17.1, 17.2

tab strip

18

first lever

18.1

radius

19

second lever

19.1

outside

19.2

radius

20

recess

21

catch edge

22.1, 22.2

cam

Claims (17)

1. Lidded vessel made of plastic for laboratory use comprising

   - a tubular vessel (2) which has a vessel base (5) at the bottom, a vessel opening (6) at the top and a sealing region (7) on the inner wall below the vessel opening,

   - a lid (11) which has a lid base (12) and a plug (13) which projects from the inside of the lid base and can be inserted through the vessel opening (6) into a sealing position in the sealing region (8), and

   - a locking devices (16) for releasably latching the lid (11) to the vessel (2), comprising

   - at least one locking projection (9.2) projecting radially outwards at the upper edge of the vessel (2),

   - at least one flexible and elastic tab (17) projecting from the underside of the lid base (12),

   - a first lever which projects laterally outwards from the tab (17) at a distance from the lid base (12) and on which a latching edge (21) is arranged at a distance from the lid base (12) and which can be snapped under the latching projection (9.2) when the plug (13) is inserted into the sealing region (8), characterized in that a second lever (19) projects upwardly from the first lever (18) at a distance from the tab (17) when the lid is closed, the latching edge (21) being releasable from the latching projection (9.2) by pressing from the side against the outside of the second lever (19).
2. Lidded vessel according to claim 1, in which the second lever (19) is inclined outwards at least on the outside (19.1) starting from its connection to the first lever (18).
3. Lidded vessel according to claim 1 or 2, in which the first lever (18), when the latching edge (21) is released from the latching projection (9.2), bears with its upper side against the lower outer edge (9.4) of the underside of the latching projection (9.2), so that the first lever (18) slides with its latching edge over the lower outer edge (9.4) of the latching projection (9.2) when it is pressed further against the second lever (19) until the latching edge (21) is released from the latching projection (9.2).
4. Lidded vessel according to one of claims 1 to 3, in which the second lever (19) rests with its inside at a distance from the first lever (18) laterally against the latching projection (9.2) when the latching edge (21) is latched with the latching projection (9.2), and the second lever (19) is pivotable about the latching projection (9.2) by pressing from the side against the outside (19.1) of the second lever (19).
5. Lidded vessel according to one of claims 1 to 4, in which the latching projection (9.2) is formed on a flange (9.1) which revolves at least partially around the circumference of the upper outer edge of the vessel.
6. Lidded vessel according to one of claims 1 to 5, in which the latching edge (21) is arranged vertically under the connection of the tab (17) to the lid base (12) and/or the latched latching edge (21) is supported on a surface of the latching projection (9.2) which is directed tangentially to a radius around the connection of the tab (17) to the lid base (12) or is pivoted downwards in the outward direction away from the tangents to the radius.
7. Lidded vessel according to one of claims 1 to 6, in which the latching projection (9.2) has a radius (9.3) at the upper outer edge and/or the tab (17) or the first lever (18) has a radius (18.1) at the bottom of the inner edge.
8. Lidded vessel according to any of claims 1 to 7, in which the second lever (19) extends upwards to the level of the connection between the tab (17) and the lid base (12).
9. Lidded vessel according to one of claims 1 to 8, in which the tab (17) is connected to a lid edge (12.3) of the lid base (12) and is aligned vertically or is inclined outwards starting from its connection to the lid edge (12.3).
10. Lidded vessel according to one of claims 1 to 9, in which the latching edge (21) of the lower edge is a recess (20) in the tab (17).
11. Lidded vessel according to claim 10, in which the tab (17) has two lateral tab strips (17.1, 17.2) which are connected at the top to the lid base (12) and are connected at the bottom to the first lever (18) and between which the recess (20) is present, wherein the inner, upper edge of the first lever (18) is the latching edge (21).
12. Lidded vessel according to one of claims 1 to 11, in which lid (11) and vessel (2) are connected to one another via a hinge (14).
13. Lidded vessel according to claim 12, in which the hinge is a strap hinge (14) via which the vessel (2) is integrally connected to the lid (11).
14. Lidded vessel according to one of claims 12 or 13 which, in addition to the hinge (14), has a device for locking the lid (11) in its open position.
15. Lidded vessel according to one of claims 1 to 14, in which the plug (13) is hollow-cylindrical and/or in which the plug (13) has a circumferential sealing rim (13.2) on the outer circumference.
16. Lidded vessel according to any of claims 1 to 15, which is made of a polyolefin.
17. Lidded vessel according to claims 1 to 16, which is injection-moulded from plastics material.

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