CN1143799C

CN1143799C - Can opener construction with better easiness in opening and enhanced sanitariness

Info

Publication number: CN1143799C
Application number: CNB998169455A
Authority: CN
Inventors: 赵星镐; 孙泰铉
Original assignee: BONG-JEONG INDUSTRIAL CO Ltd
Current assignee: BONG-JEONG INDUSTRIAL CO Ltd
Priority date: 1999-10-19
Filing date: 1999-11-15
Publication date: 2004-03-31
Anticipated expiration: 2019-11-15
Also published as: EA200200388A1; KR20000017742A; AU1082400A; AR026083A1; WO2001028875A1; AU755437B2; EP1222118A1; PA8505101A1; TW469251B; JP2003512262A; MXPA02003462A; BR9917524A; CA2387709A1; CN1383413A; EA003403B1

Abstract

A can lid structure, with an opening tab providing improved practicability, enhanced opening function and improved sanitariness, is disclosed. This can lid structure is preferably used with easy open cans with one-touch type opening means, or with a so-called 'stay-on tab'. In the above can lid structure, an opening tab (30), locked to a can lid using a rivet (24), is levered up by a user so as to break the seal of an opening piece (22) along a depressed seam (21) on the can lid when it is necessary to open the lid prior to emptying a can. In order to open the can lid, the free end portion (31) of the tab (30) is primarily raised up from the top surface (20) of the can lid while forming an appropriate gap between the tab (30) and the can lid by pressing the tab (30) downwardly by a finger. The tab (30) is, thereafter, levered up to break the seal of the opening piece (22) along the depressed seam (21). The above object is accomplished by a thumb pushing part (36), a thumb-operable resilient bulge (33), and/or a depressed linear portion (38) in the form of a groove, respectively formed on predetermined positions of the tab (30). This can lid structure thus accomplishes a desired sanitariness, operational convenience and operational reliability of cans (10).

Description

A kind of can opener arrangement with better openability and high wholesomeness

Technical field

The present invention relates generally to have the one touch type device for opening, the can cover structure that is used for pop can that perhaps has what is called " set collar ", in particular, the present invention relates to a kind of jar can cover structure like this, this jar is designed to can be by pointing pressing action easily lifts draw ring from the upper surface of cover outer end, thereby open ring so that opening before the sheet place opens cover drawing, at first between ring and cover, form suitable gap, desired location at ring provides the finger push piece, the elastic protrusion spare of available finger manipulation and/or groove, thereby the desirable wholesomeness realizing jar makes the user upwards lift the end of ring like a cork from cover in the time of operation convenience and operating reliability.

Background technology

As shown in Figure 1, several covers that are designed to open easily along recessed joint the draw ring 30 of the seal of opening sheet 22 on the jar 10 that have have been proposed and have used.Such as, a kind of traditional pull-type draw ring is designed to upwards draw back and opens sheet so that opening the seal of opening sheet along recessed joint leaves behind from cover fully up to opening sheet, forms opening simultaneously on cover.Another kind of pull-type draw ring is to be designed to upwards draw back open sheet so that open cover will opening under the situation that sheet not exclusively leaves behind from the cover.Also having a kind of pushing-type draw ring is to be designed to pry open formula, thereby ring will open sheet and push in jar, opens the seal of opening sheet along recessed joint simultaneously, up to the desirable opening of formation on cover.

In addition, prior art is widely used to be the compound type draw ring, and each draw ring all is designed to upwards draw so that will open sheet pushes in jar, opens the seal of opening sheet along recessed joint simultaneously.This jar draw ring 30 is made in steel or aluminum usually.In order before the turned letter jar, to open cover, upwards draw unblank to cross the draw ring 30 that rivet 24 is fixed on cover upper surface 20, thereby open the seal of opening sheet 22 along the recessed joint 21 of cover, the upper surface 20 at cover forms a desirable opening simultaneously.Therefore, the user can be by the opening turned letter jar that forms on the cover.

Yet this tradition jar is a kind of head tank or vacuum seal jar, and therefore jar is subjected to the influence of water hammering action easily, and promptly when jar was subjected to unexpected external action, a jar inner high voltage object can carry out bad supercharging to cover.Under the situation of this water hammering action, the unlatching sheet 22 that is limited on the cover by recessed joint 21 can be formed with shearing stress, may unexpectedly open the seal of opening sheet 22 along recessed joint 21.Therefore, recessed joint 21 must have enough thickness and bears this shearing stress that produces owing to water hammering action.To open sheet 22 and form opening on cover in order to open along recessed joint 21, the user must apply certain power to opening sheet 22 by draw ring 30.When the user drew the end of opening draw ring 30, draw ring 30 was had an effect with opening sheet 22, and beginning applies tensile force to recessed joint 21, therefore, was difficulty a bit with the end 31 of draw ring 30 from upper surface 20 pull-ups of cover.This requires the people of theirs on every side to replace them to open their jar with regard to forcing some children or old man.In addition, closely be close together with cover, force the user opening draw ring 30 opens the seal of opening sheet 22 along recessed joint 21 before at the draw ring that does not stay certain interval between ring and the cover by drawing, must between ring 30 end 31 and cover, insert a thin object, such as nail, so as gently with the end 31 of ring separately from the upper surface 20 of cover.Yet this traditional jar is inconvenient to the user when opening cover, that is to say that it is very difficult that the user opens cover by nail operation draw ring 30.Therefore, this tradition jar sometimes can unexpectedly destroy user's nail or damage user's finger.Another weak point of this tradition can cover structure is the unlatching sheet 22 of cover easily by impurity, and such as pollutions such as dusts, therefore this cap structure is antihygienic.

Summary of the invention

Therefore, the present invention considers the problems referred to above that occur in the prior art and finishes, the purpose of this invention is to provide a kind of can cover structure that has opening device, described opening device provides the open function of raising and the wholesomeness of improvement, described can cover structure is designed to easily the outer end of the draw ring upper surface from cover be lifted by finger press action, thereby open ring and at first between ring and cover, form suitable gap before opening cover drawing so that opening the sheet place, desired location at ring also provides the finger push piece, the elastic protrusion spare of available finger manipulation and/or groove, thereby the desirable wholesomeness realizing jar makes the user upwards lift the end of ring like a cork from cover in the time of operation convenience and operating reliability.

This can cover structure of the present invention is to the U.S. Patent No. 5813559 by the present inventor all or application, Japanese Patent No.2913279, the improvement of disclosed can cover structure among Korean Patent No.141618 and the korean patent application No.99-12571.

To achieve these goals, first kind of embodiment of the present invention provides a kind of can cover structure, comprise: one is connected on the cover outside with rivet and is used for where necessary opening the draw ring of opening the sheet seal along recessed joint unlatching sheet that cover upper edge recessed joint forms and one, wherein, be formed with the concave part of some groove shape in the desired location of draw ring.In another embodiment of the invention, predetermined portions at draw ring is formed with the elastic protrusion spare that refers to push piece or available finger manipulation, thereby when under the elastic protrusion spare place that is referring to push piece place or available finger manipulation with finger during pressure ring, the free end portion of ring just can lift from elasticity on the cover, forms suitable gap simultaneously between ring and lid.

In the present invention, on the upper surface of the elastic protrusion spare of available finger manipulation or lower surface, can be formed with a plurality of rule grooves at interval, thereby protrusion can be operated smoothly with concentric circles profile, linear profile or comb structure profile.

In further embodiment, draw ring is designed to have as a kind of original function of can opener and opens the additional function of the sanitary cover of sheet as cover.In this case, draw ring has also obviously improved the wholesomeness of jar except the open function with raising.

Brief description of drawings

After the following detailed description in conjunction with the drawings, can more be expressly understood above-mentioned purpose of the present invention and other purposes, feature and other advantage, in the accompanying drawings:

Fig. 1 is the block diagram according to the cover that has draw ring of first kind of embodiment of the present invention;

Fig. 1 a to 1e is plane or section-drawing, and the structure of the concave part that provides on draw ring according to the improvement of first kind of embodiment of the present invention has been provided respectively;

Fig. 1 f and 1g are plane and section-drawing, have shown according to other improvement of first kind of embodiment of the present invention the sagging part that forms below draw ring concave part on cover;

Fig. 1 h to 1j is a planar view, and the finger push piece structure that provides on draw ring according to other improvement of first kind of embodiment of the present invention has been provided respectively;

Fig. 1 k to 1n is plane or section-drawing, has shown the structure of the concave part that forms on draw ring according to other improvement of first kind of embodiment of the present invention respectively;

Fig. 1 o to 1q is a planar view, and the finger push piece structure that provides on draw ring according to the further improvement of first kind of embodiment of the present invention has been provided respectively;

Fig. 1 r is a section-drawing, has shown the cover open operation according to the draw ring of first kind of embodiment of the present invention;

Fig. 2 is the block diagram according to the cover that has draw ring of second kind of embodiment of the present invention;

Fig. 2 a to 2c is plane or section-drawing, has shown according to the improvement of second kind of embodiment of the present invention the structure of the rule groove at interval that forms on the upper surface of the elastic protrusion spare of available finger manipulation on the draw ring or lower surface respectively;

Fig. 2 d to 2i is a planar view, and the structure of the reinforcement that provides on the elastic protrusion spare of available finger manipulation on the draw ring according to the improvement of second kind of embodiment of the present invention has been provided respectively;

Fig. 2 j to 2l is a planar view, has shown the structure of the concave part that forms on draw ring according to the improvement of second kind of embodiment of the present invention respectively;

Fig. 2 m to 2o is section or planar view, has shown the structure of the concave part that forms on draw ring according to other improvement of second kind of embodiment of the present invention respectively;

Fig. 2 p to 2u is a planar view, has shown according to other improvement of second kind of embodiment of the present invention the structure of the rule groove at interval that forms on the upper surface of the elastic protrusion spare of available finger manipulation on the draw ring or lower surface respectively;

Fig. 2 v to 2w is plane and section-drawing, has shown the structure that is positioned at the sagging part that forms below the draw ring concave part according to other improvement of second kind of embodiment of the present invention on cover;

Fig. 2 x is a width of cloth view, has shown the structure that is positioned at the sagging part that forms below the draw ring concave part according to the further improvement of second kind of embodiment of the present invention on cover;

Fig. 2 y to 2z is a planar view, and required advertisement that provides on the elastic protrusion spare of available finger manipulation on the draw ring or the guiding pattern of opening draw ring according to the improvement of second kind of embodiment of the present invention have been provided;

Fig. 3 is a kind of block diagram of the cover that has draw ring according to the third embodiment of the present invention;

Fig. 3 a to 3e is a planar view, has shown that respectively improved additional each all has the structure of the draw ring of rule groove at interval as the sanitary cover of opening sheet on the cover and on the upper surface of the elastic protrusion spare of available finger manipulation or lower surface according to the third embodiment of the present invention;

Fig. 3 f to 3h is a planar view, has shown that respectively improved additional each all has the structure of the draw ring of rule groove at interval as the sanitary cover of opening sheet on the cover and on the upper surface of the elastic protrusion spare of available finger manipulation or lower surface according to other of the third embodiment of the present invention;

Fig. 3 i to 3l is a planar view, has shown according to the third embodiment of the present invention improved additional as opening the sanitary cover of sheet on the cover and each all has the structure of the draw ring of reinforcement on the elastic protrusion spare of available finger manipulation respectively;

Fig. 3 m to 3o is a planar view, has shown respectively according to improved the adding as the sanitary cover of opening sheet on the cover and each of the third embodiment of the present invention all to have the structure of the draw ring of concave part;

Fig. 3 p and 3q are planar views, have shown that respectively other improved the adding as the sanitary cover of opening sheet on the cover and each according to the third embodiment of the present invention all has the structure of the draw ring of concave part;

Fig. 3 r to 3t is a planar view, has shown according to other of the third embodiment of the present invention improved additional as opening the sanitary cover of sheet on the cover and each structure of draw ring that all provides required advertisement or open the guiding pattern of draw ring on the elastic protrusion spare of available finger manipulation respectively;

Implement best mode of the present invention

As shown in the drawing, the draw ring 30 that provides on cover of the present invention has a free end portion, or first end section 31, and in the time will opening cover, user's finger application force is applied to this first end section.Be formed with a hole 34 at the center of this end 31, and be formed with a rivet hole in the fixed end or the second end section of draw ring 30, draw ring 30 just is fixed on the cover with rivet 24 at the rivet hole place.Shown in Fig. 1 a to 1r, on draw ring 30, be formed with the concave part 38 of groove shape near the position of first end section 31.Core on ring 30 between hole 34 and second end section can provide a kind of finger push piece 36 with multiple shape, thereby makes the user can more easily press down draw ring 30.According to other improvement of first kind of embodiment of the present invention, shown in Fig. 2 a to 2z, on draw ring 30, can be formed with a kind of usually to the elastic protrusion spare 33 of the available finger manipulation of upper process.On the upper surface of described elastic protrusion spare 33 or lower surface, can be formed with a plurality of rule grooves 37 at interval with concentric circles profile, linear profile or comb structure profile.31 the concave part 38 that provides on every side is some grooves with preliminary dimension and horizontal expansion in the first end section.Around the rivet hole of draw ring 30, be formed with crossbow incision 32, make to lever up so that when opening cover when ring 30 that ring 30 can bending.In above-mentioned draw ring 30, draw ring 30 is preferably that its width of direction of assigning to first end section 31 from the second end enlarges gradually and its two ends all have arc profile.

The elastic protrusion spare 33 of available finger manipulation at center that is formed on the first end section 31 of draw ring 30 is designed to have certain profile and elasticity, this profile and elasticity make protrusion 33 normally to upper process, but when it is pressed down by finger, will be optionally and reverse projection flexibly.That is, when the elastic protrusion spare 33 of available finger manipulation was pressed down by user's finger, the ring body that protrusion 33 will comprise end 31 was from upper surface 20 parts of cover and flexibly lift, and formed suitable gap simultaneously between the upper surface of ring body and cover.In the present invention, on draw ring 30, can be formed with the elastic protrusion spare 33 of several types, for example, the overline bridge shape protrusion shown in the cheese protrusion shown in Fig. 2 a or Fig. 2 e.Can smoothly and flexibly operate when pressing down with finger in order to make elastic protrusion spare 33, as shown in Fig. 2 a to 2u, can be formed with a plurality of rule grooves 37 at interval on the upper surface of elastic protrusion spare 33 or the lower surface with concentric circles profile, linear profile or comb structure profile.Certainly, should be understood to here when not influencing function of the present invention, the profile of one or more grooves 37 can have some freely to change.

In the present invention, on the first end section 31 of draw ring 30, can be formed with the concave part 38 of the groove shape of horizontal expansion.Above-mentioned concave part 38 can be like a cork upwards lifted the first end section 31 of draw ring 30 upper surface 20 from cover the user, thus make the user separately and in phase the drawing of action and ring of lifting of operation ring start and do.Certainly, shown in Fig. 1 a to 1r and Fig. 2 j to 2z, when not influencing function of the present invention, concave part 38 can have multiple profile.Yet, when will be on cover recessed joint when opening the seal of opening sheet 22, concave part 38 must have enough intensity and bear suffered external force.In the present invention, two concave parts 38 can laterally be formed on the two opposite sides of draw ring 30.Thereby the first end section 31 that can make draw ring 30 is at upper surface 20 K/UPs of concave part 38 from cover, so that form the gap with about 25 ° to 30 ° inclination angle between end 31 and upper surface 20.

As selection, shown in Fig. 1 k to 1n and Fig. 2 m to 2o, can be formed with two horizontal concave parts 38 on each limit of draw ring 30.In addition, one or more grooves 37 can be different with the shape in the accompanying drawing with the shape of reinforcement 35 through cutting when not influencing function of the present invention.When applying the application force that makes progress on the end 31 of the draw ring 30 that is having the concave part 38 shown in Fig. 1 r, flexibly upwards lift in concave part 38 end 31, thereby form suitable gap between the upper surface 20 of end 31 and cover.Make the user to draw in the end 31 of draw ring 30 and the gap between the cover and open draw ring 30 with the light finger loose ground.When the user draws when opening draw ring 30 as mentioned above, the second end section of draw ring 30 presses down opens sheet 22, thereby opens the seal of opening sheet 22 and form opening on cover along recessed joint 21.

On the other hand, in order to open the cover of the elastic protrusion spare 33 that has the available finger manipulation shown in Fig. 2 a to 2z on draw ring 30 before turned letter jar 10, the elastic protrusion spare 33 on the draw ring 30 at first presses down with finger so that flexibly reverse projection.In this case, protrusion 33 is from the end 31 that the upper surface 20 of cover flexibly lifts draw ring 30, forms certain clearance simultaneously between the upper surface 20 of the end 31 of draw ring 30 and cover.Then, apply a little power on the end 31 of the draw ring 30 that at first lifts, end 31 is in the 38 places bending of concave part then, thereby makes the user operate the end 31 of draw ring 30 more like a cork.The end 31 of draw ring 30 and the gap between the cover make the user by drawing like a cork and open draw ring 30 with finger pull end portion 31.When the user draws when opening draw ring 30 as mentioned above, the second end section of draw ring 30 presses down opens sheet 22, can open the seal of opening sheet 22 along recessed joint 21, and form opening on cover.So the user can be by the opening turned letter jar that forms on the cover.

In the improvement of Fig. 1 h to 1i and Fig. 1 o to 1q, on draw ring 30, provide and refer to push piece 36, refer to that push piece 36 makes and be formed with small hole size 34 near 31 places, end.Therefore this finger push piece 36 is providing bigger area on the draw ring 30 between hole 34 and crossbow incision 32, makes the user can use finger press draw ring 30 more like a cork.

In the improvement of Fig. 1 f, 1g, 2v and 2w, on the upper surface 20 of cover, be positioned at and be limited with a sagging part 23 below the concave part 38 of draw ring 30.Press down so that when the upper surface 20 of cover upwards lifts the end 31 of draw ring 30 when referring to that push piece 36 or elastic protrusion spare 33 usefulness are pointed, above-mentioned sagging part 23 makes the end 31 of draw ring 30 in the 38 easier bendings of concave part.

In the improvement of Fig. 1 o to 1q, Fig. 2 y and 2z, on the elastic protrusion spare 33 of the finger push piece 36 of draw ring 30 or available finger manipulation, provide with the required advertisement of literal, symbol or graphic form or the guiding pattern 100 of opener tab.The formation of the above-mentioned pattern 100 on the draw ring 30 can be passed through intaglio technology, embossing technology, artistic carving or typography and realize.

In the improvement of Fig. 2 d to 2i, 2k, 2l and 2s to 2v, on the elastic protrusion spare 33 of the available finger manipulation of draw ring 30, provide reinforcement 35 through cutting, make that elastic protrusion spare 33 can be operated more smoothly when protrusion 33 is pressed down by the user.In the present invention, when not influencing function of the present invention, the reinforcement 35 through cutting can have multiple shape.In addition, the draw ring 30 that is fixed on cover upper surface 20 with rivet 24 can be designed on the unlatching sheet on normal and the surface 20 that fully is incumbent on.Above-mentioned draw ring 30 opens so that Rotate 180 ° on upper surface 20 selectively open the seal of opening sheet 22 along recessed joint 21 before drawing.

In the third embodiment of Fig. 3 to 3t, draw ring 30 is additional as the sanitary cover of opening sheet 22 on the cover.Those skilled in the art is very clear, and when the turned letter jar, opening sheet 22 is the parts that contact with user's lip.In other words, according to the third embodiment of the present invention, the purpose of draw ring 30 is obviously to improve the wholesomeness of jar.

In this third embodiment, draw ring 30 is fixed on the unlatching sheet 22 on the surface 20 that is incumbent on fully simultaneously on the upper surface 20 of cover.In this case, laterally be formed with two concaves 233 at the elastic protrusion spare 33 of available finger manipulation on the draw ring 30 and the correct position between the rivet coupling end part.Center between two concaves 233 on the draw ring 30 is formed with shaft-like protrusion 234.

Open sanitary cover on the sheet 22 according to the draw ring 30 of the third embodiment is additional as covering cover fully, thereby prevented impurity,, pollute and open sheet 22 such as dust etc.Therefore, the draw ring 30 of this embodiment has been realized the desirable wholesomeness of jar.In order before turned letter jar, to open cover, press down the elastic protrusion spare 33 of draw ring 30 with finger, so the flexibly reverse projection of protrusion 33.In this case, protrusion 33 is flexibly lifted the end 31 of draw ring 30 upper surface 20 from cover.Then, draw ring 30 is drawn to open, thereby as shown in Figure 3 at concave 233 place's K/UPs.In this case, the unlatching sheet 22 of cover is given prominence to and pressed down to the rod-like protrusions thing 234 on the draw ring 30 from crossbow incision line 232, thereby open the seal of opening sheet 22 along recessed joint 21, forms opening simultaneously on cover.Briefly, the draw ring 30 according to the third embodiment of Fig. 3 to 3t has as the original function of can opener with as the additional function of opening sheet 22 sanitary covers.Therefore, the draw ring 30 of the third embodiment has also obviously improved the wholesomeness of jar except the open function with raising.

In above-mentioned the third embodiment, as providing on Fig. 3 draw ring that r to 3t is shown in 30 with the required advertisement of literal, symbol or graphic form or the guiding pattern 100 of opener tab.In addition, be shown in the reinforcement 35 that can be formed with on the elastic protrusion spare 33 of available finger manipulation of draw ring 30 as i to 31 of Fig. 3 through cutting.In this embodiment, as being formed with a plurality of rule grooves 37 at interval on the upper surface of Fig. 3 elastic protrusion spare that a to 3h is shown in 33 or the lower surface with concentric circles profile, linear profile or comb structure profile.When protrusion 33 usefulness finger pressed down, above-mentioned concave part 38 can make elastic protrusion spare 33 operate more smoothly.In addition, can be formed with concave part 38 one or more groove shape and that have preliminary dimension on the first end section 31 as Fig. 3 draw ring that m to 3q is shown in 30.

Industrial applicibility

As mentioned above, the invention provides a kind of can cover structure that has opening device, this can cover structure provides the open function of raising and the wholesomeness of improvement.Opening device of the present invention makes user's jar of easily, simply and wholesomely opening and turn.Therefore, the present invention has realized the desirable wholesomeness of jar to the user simultaneously very easily.

Although for illustrative purpose discloses preferred implementation of the present invention, those skilled in the art can understand, under the situation that does not break away from disclosed scope and spirit of the present invention in the appended claims, can carry out various improvement to the present invention, add and replacement.

Claims

1. can cover structure, comprise a draw ring that outside unlatching sheet that cover upper edge recessed joint forms and, is connected on the cover and is used for opening the seal of opening sheet where necessary along recessed joint, said draw ring is fixed on the cover in its fixed end part with rivet, said ring also has a crossbow incision and a hole, crossbow incision be positioned at the rivet junction around, the hole is between fixed end part and free end portion, wherein

Two opposite sides is formed with the concave part around the said free end portion of draw ring, so that free end portion can upwards be lifted from cover like a cork in the concave part, said concave partly is the groove with preliminary dimension and horizontal expansion.

2. according to the can cover structure of claim 1, wherein be formed with a sagging part between the concave partial sum crossbow incision at draw ring on the outside face of cover, thereby when concave partly is pressed downward, making the free end portion of ring can more easily upwards lift in this concave part.

3. according to the can cover structure of claim 1, wherein a side of concave part provides a finger push piece on said ring, makes the concave part more easily to operate.

4. according to the can cover structure of claim 3, wherein on the finger push piece of said draw ring, provide the required advertisement or the guiding pattern of opener tab.

5. can cover structure, comprise a draw ring that outside unlatching sheet that cover upper edge recessed joint forms and, is connected on the cover and is used for opening the seal of opening sheet where necessary along recessed joint, said draw ring is fixed on the cover in its fixed end part with rivet, said ring be positioned at the rivet junction around also have a crossbow incision, on fixed end part of encircling and the position between the free end portion, provide the elastic protrusion spare of available finger manipulation, thereby make the free end portion of ring easily upwards to lift, wherein from cover

The rule that on the lower surface of the elastic protrusion spare of said available finger manipulation, is formed with a plurality of concentric circles at interval and the groove of suitable dimension, thereby make described protrusion to be operated smoothly.

6. according to the can cover structure of claim 5, wherein on the elastic protrusion spare of the said available finger manipulation of draw ring, be formed with reinforcement, so that make this elastic protrusion spare to operate more smoothly through cutting.

7. according to the can cover structure of claim 5 or 6, wherein on draw ring around the said free end portion two opposite sides be formed with the concave part, so that this free end portion can more easily upwards be lifted from cover on the concave part, said concave partly is some grooves with preliminary dimension and horizontal expansion.

8. according to the can cover structure of claim 1 or 7, wherein the every limit around the said free end portion is formed with two or more concave parts on draw ring, so that the free end portion of draw ring can more easily upwards be lifted from cover in the concave part.

9. according to the can cover structure of claim 5 or 6, wherein the rule that is formed with a plurality of linear profiles or comb structure profile at the lower surface of the elastic protrusion spare of available finger manipulation at interval and the groove of regular size, thereby this protrusion can be operated smoothly.

10. according to the can cover structure of claim 7, wherein on the outside face of cover, be formed with a sagging part, it is between the crossbow incision of concave partial sum draw ring, wherein the concave parts transversely is formed on the two opposite sides of free end portion on the draw ring, thereby when concave partly is pressed downward, the free end portion of ring can more easily partly upwards be lifted at concave.

11. according to the can cover structure of claim 9, wherein the upper surface of the elastic protrusion spare of said available finger manipulation be formed with a plurality of rules at interval, the groove of regular size and regular shape, thereby this protrusion can be operated smoothly.

12., wherein on the elastic protrusion spare of the available finger manipulation of said draw ring, provide the required advertisement or the guiding pattern of opener tab according to the can cover structure of claim 5 or 6.

13. can cover structure, comprise a unlatching sheet that forms at cover upper edge recessed joint, with one be connected on outward on the cover and under normal circumstances be used for to cover and open on the sheet and be used for optionally opening the draw ring of the seal of opening sheet where necessary along recessed joint, said draw ring is fixed on the cover in its fixed end part with rivet, said ring also has the crossbow incision line one at centre portion, have twice from the two ends of crossbow incision line the concave to the horizontal expansion of ring two opposite sides, the elastic protrusion spare that concave on ring and the position between the free end portion provide an available finger manipulation, so that the free end portion of ring can more easily upwards be lifted from cover, also has a shaft-like protrusion at crossbow incision line place, with convenient draw ring when concave partly is bent, this shaft-like protrusion can be with the unlatching sheet of cover to pressing down, thereby open the seal of opening sheet along recessed joint, wherein

Be formed with a plurality of rules at interval and the groove with concentric circles profile, linear profile or comb structure profile of suitable dimension at the upper surface of the elastic protrusion spare of said available finger manipulation or lower surface, thereby protrusion can be operated smoothly.

14., wherein on the elastic protrusion spare of the said available finger manipulation of draw ring, be formed with a reinforcement, so that elastic protrusion spare can be operated more smoothly through cutting according to the can cover structure of claim 13.

15. can cover structure according to claim 13 or 14, wherein the every limit around the said free end portion is formed with one or more concave parts on draw ring, so that free end portion can upwards be lifted from cover in the concave part more like a cork, said concave partly is the groove with preliminary dimension and horizontal expansion.

16., wherein on the upper surface of the elastic protrusion spare of the said available finger manipulation of said draw ring or lower surface, provide the required advertisement or the guiding pattern of opener tab according to the can cover structure of claim 13 or 14.