CN1070888A

CN1070888A - Tin opener

Info

Publication number: CN1070888A
Application number: CN92105136A
Authority: CN
Inventors: 顾康华
Original assignee: Jianyi Co ltd
Current assignee: Jianyi Co ltd
Priority date: 1991-06-17
Filing date: 1992-06-17
Publication date: 1993-04-14
Also published as: EP0519646A2; GB9113022D0; AU1825792A; CA2071374A1; EP0519646A3; JPH05170286A; ZA924388B

Abstract

A kind of tin opener, be used to open the can that lid and can main body link together with flange, in this opener, can is to open by the outside of the flange of cutting connection cover and can main body, this tin opener comprises being used for interlock and cutting the exterior cut-off wheel of described flange of a rotatable supporting, be used for the rotatable drive wheel of interlock flange in-to-in, this flange is clamped on device between cut-off wheel and the drive wheel, when rotating with convenient drive wheel, this tin opener can cut an otch around the outside of flange around can flange rotation while cut-off wheel, and the leverage that drives free-wheel clutch, this leverage is used to rotate drive wheel makes tin opener advance around can.

Description

Tin opener

The present invention relates to tin opener, particularly relate to cutting off the outer part that connects between can ends and the pot sidewall, the tin opener that takes off the sort of type of can ends.

The example of this tin opener that can reference is such as US Patent 4,734,986 and WO 90/05108 shown in.This shown class tin opener at first around making otch by lid self material along the flange of the top fold one-tenth of the vertical wall of can, then, separates its other parts with can with the clamping device pry-off cap it is taken off.

The advantage of this class tin opener is that the top margin of can is stubbed after opening, and promptly the part of coming out around can sidewall top margin actual exposed is smooth, the user that can not injure the grasping can or be in contact with it.And, the folding material of the remainder of can still can be strengthened top margin well, still can make can keep its original shape during the grasping can, again because only cut in the outside of can wall, can not penetrate in the can, thereby not having scrap metal or similar articles to pollute the interior article of can, the cutting knife of not enough health also can not touch the article in the can.

A problem of this class tin opener is to drive tin opener around flange quite to require great effort, and the user of this class tin opener is the housewife often, uses to feel gruelling, thereby has no attraction from this respect.

The purpose of this invention is to provide a kind of improved tin opener, in this opener, the power that drives this tin opener around flange can remain on reasonable range.

The invention provides a kind of tin opener, this opener is used to open a kind of can that links together with flange with main body that covers, in this opener, open a tin is that finish outside by the flange by cutting connection cover and can main body, this tin opener comprises that an outside that is used for interlock and the described flange of cutting is rotated the cut-off wheel of supporting, one is used for the rotating drive wheel of interlock flange in-to-in, the device of the flange of chucking between cut-off wheel and drive wheel, when rotating with convenient drive wheel, tin opener rotates around the can flange, cut-off wheel can be made a complete otch around the outside of flange, with the leverage that drives free-wheel clutch, this free-wheel clutch is used for the rotating drive wheel makes tin opener push ahead around can.

We know, use this tin opener, and a people applies more moderate power to leverage just can make cut-off wheel advance gradually.The leverage crank motion so just can be at every turn when working direction moves, and the tin opener that makes that cut-off wheel will rotate a smaller amount advances; When reversing sense moves, free-wheel clutch will make throw of lever return at every turn, and can be simultaneously along the reverse drive cut-off wheel.

The device that flange is clamped between cut-off wheel and the drive wheel preferably includes a pair of pivoted body spare, two arms that these parts have the autorotation center to stretch out.When these two arms pool together, cut-off wheel and drive wheel are drawn close mutually with the chucking flange; Equally, when these two arms were removed mutually, cut-off wheel and drive wheel were removed, and free chucking.

In most preferred embodiment of the present invention, leverage comprises that the 3rd arm is lever, this arm is around the drive wheel pivot axis, and can between closure and open position, move, when this arm is shifted to open position forward, owing to free-wheel clutch freely rotates, so drive wheel is rotated, when this arm was shifted near one in two arms of parts make position, power-transfer clutch rotated drive wheel.

The most handy spring installation of throw of lever flexibly pushes it against the open position, so that make it be in the position of preparing the rotating drive wheel.In this most preferred embodiment, also be provided with blocking device throw of lever is locked in make position near one of described arm of body spare, therefore, when folding body spare arm clamps or unclamps the can flange, throw of lever keeps keeping flushing state with a described arm, and moves with it.This has levied throw of lever with regard to the guarantor and can not produce manipulation and use the general trouble that tin opener had.

A simple free-wheel clutch comprises an escapement by the elastomeric mounting of throw of lever driving, this escapement is meshed with tooth that make or fixed thereon on the axle of drive wheel, and this escapement is when a direction relatively rotates and tooth engagement locking; Then slipping over tooth when another direction is rotated freely rotates.

In order further to reduce the application force that drive wheel is rotated, the most handy metal shaft supporting of drive wheel, this metal shaft rotatably is contained in the metal sleeve by the supporting of the fuselage of tin opener, the inside face of this outside face and sleeve cooperatively interacts in the position near sleeve ends, so that provide swivel bearing to axle.Those positions in the middle of the inside face of the outside face of axle and sleeve have the gap and prevent that axle from contact with sleeve, with the friction force of minimizing spool when sleeve rotates.

Because this layout, the quite little friction force of maintenance between two partial sum sleeves of the metal shaft that engages with sleeve itself, and avoided unnecessary friction force owing to having the gap at axle and sleeve core.Therefore, do not need the core of axle to contact with sleeve for the end of matching at sleeve and axle provides good swivel bearing, in addition, available lubricating ester series lubricant agent is filled in the groove that mating part forms.

The steel of the outside face of the inside face of sleeve and axle preferably hardens, to guarantee the friction force minimum.For example, can harden and be tempered to 45 to 56 by the third constellations, Lip river durometer level (HRC).

By one embodiment of the present of invention, the diameter of cross-sectional plane is a unmodified in the sleeve, and axle is being specified the position that has a diameter to reduce between two zones that contact with sleeve, so that described gap is provided.

As in No. 90/05108 specification sheets of WO, explaining: require cut-off wheel to cut in the substantially invariable predetermined distance of distance flange lower end.As in this part specification sheets, being explained, this available permission cut-off wheel is realized along the springing of the axial direction resilient movement cut-off wheel of its rotation axis, with link to each other with cut-off wheel, axis leaves the copying system of a predetermined space apart from cut-off wheel, this copying system is lined up with the flange downside and is engaged.The copying system that fit to move with the flange downside and head on the cut-off wheel that springing moves to a certain position cut-off wheel is cut with substantially invariable distance apart from the flange downside on flange.

Like this, no matter because the size of the shape and size of can and flange and highly how, because copying system is fitted in below the flange, in case of necessity, the elasticity that cut-off wheel overcomes springing moves to the position that is positioned at a certain setting above the flange lower edge, make an otch in the optimum position of tearing lid open, thereby can obtain uniform good result.In addition, when opener rotates around can, if also can adapt to when the height of flange changes.

In a most preferred embodiment, copying system comprises a circular rim, this circular rim has one to go up the plane slight inclination in fitting with the perpendicular plane of this wheel rim axis and with flange bottom, when the can wheel rim is clamped between cut-off wheel and the drive wheel, when being used to make this wheel rim to be fitted in the bottom of flange, the inclined surface of circular rim and coupled cut-off wheel can overcome the power of springing and move, firmly make the cutting edge of cut-off wheel penetrate the outside of this flange, the diameter of this circular rim is greater than the diameter of cut-off wheel because it will with must be less than the vertical wall interlock mutually of the can main body of lip diameter.But,, can be selected the difference of these diameters for the cutting edge that guarantees cut-off wheel can excessively not enter above the flange outer layer material.

Circular rim and cut-off wheel can be made of a block of material, also can make respectively, fuse then, so that rotation therewith and vertically moving together along its rotation axis.They are mounted on its shared rotation axis easily.

Springing can comprise a rubber grommet that is installed between copying system and the fixed bearing, for make copying system be fitted in flange below, when copying system moved down cut-off wheel, rubber grommet was by compression; When cutting operation finished, compressed packing ring made cut-off wheel be returned to original position along its rotation again.

US Patent just as described above is illustrated: the cutting knife bearing at tin opener has the problem that high tolerance must be provided, and the purpose of this patent provides a kind of mode that realizes this point.Yet, described in No. 90/05108 specification sheets of WO just as noted above like that: cut-off wheel be can be rotated to support on the hard d-axis that stretches out from a body spare, on described axle, the circular rim of a diameter greater than cut-off wheel is housed, be provided with one that stretch out from a body, be the vertical abutment wall of arc at center with the rotation axis of cut-off wheel, this circular rim is arranged to lean against on the abutment wall, helps bolster and cut-off wheel when cutting can flange.

We also find: in this structure, even the rotation axis broaching load of cut-off wheel more also can accurately remain unchanged.In general, the artificial plastic production of body spare, axle also can be used this material; So that axle can be made one with a described body spare or make other part that separate, the S. A. of cut-off wheel is easily deformable under load, because the plastics of described parts can not stop this distortion.People do not wish to occur this distortion, because can lose desired accurate cutting tolerance, but can make this distortion remain to minimum degree for the axle supporting, like this, the arc supporting wall supports the circular rim that is installed on the axle, help to prevent that axle is crooked, particularly all the more so when circular rim is contained in the outside of cutting edge under load.

We find: it is important with high tolerance cutting tool being positioned on the can be opened.Therefore, one in the preferably a pair of body spare is rotated mutually around another, and has the integral handle that this pivot center direction stretching, extension is left on common edge, has the flat basically plane at the position, interval between cut-off wheel and drive wheel; The integral handle of another body spare has a flat substantially lower surface, this lower surface basically with an above-mentioned body spare on flat basically surface be positioned at same plane, thereby, when when these two body spares and integral handle rotation thereof, making this tin opener be fitted on the can flange, those two surfaces will lean against the axis of the top of can flange and centering cut-off wheel, so that in the plane of containing those two surfaces, the axis of cut-off wheel parallels with the vertical axis of can at least.

Its advantage is: along waiting to make the accurately annular cutting edge of levelling cut-off wheel of cut-out direction, and guarantee to rotate together when making the close grip flange of drive wheel and cut-off wheel when body spare and handle thereof, make cutting edge accurately begin to cut flange, thereby can obtain the cutting effect of unanimity from a kind of can to another kind of can to the cut-out direction of alignment request.

Preferably select a body spare of described supporting cut-off wheel on a side of the drive wheel opposite, to also have another mating surfaces with cut-off wheel, this mating surfaces leaves certain distance downwards from the surface that is positioned at the described substantially flat on the described body spare, its value equals the degree of depth of can flange the inside substantially, that is to say the height that equals the flange above the can ends top center district, like this, this another mating surfaces will lean against on the top of lid, and guarantee the axis of centering cut-off wheel equally, make it along becoming to parallel with the vertical axis of can in a lateral direction with respect to a plane containing these two axis.In fact, because this auxiliary contact surface, when the user forwards body spare to open position and be placed on tin opener above the can flange to be opened, there are three points to contact with can, therefore, when all handles close up, make cut-off wheel keep correct orientation to thrust flange.

As described in the above pointed specification sheets WO 90/05108, preferably select such drive wheel: its external cylindrical surface has tooth, make its flange body of nipping help tin opener to rotate around can, the bottom of this drive wheel external cylindrical surface in use, promptly the edge near can ends is a bevelled.

Owing to be provided with this hypotenuse, we are surprised to find: though the effect of this hypotenuse is actually the area of contact that has reduced between drive wheel and the can flange, it is easier to drive.Particularly look it is that the wall angle of can is a leak free, but that flange twists often is rough so that at the outside face of drive wheel under the cylindrical condition completely, in any case can only realize the line contact; And tin opener of the present invention can obtain bigger area of contact between drive wheel and fillet leak free can flange.

In addition, we also find: the depth tolerances of wishing the otch that maintenance is produced does not obviously surpass material layer very near desired value so that cut-off wheel thrusts flange, and in addition, the gripping power between cut-off wheel and the drive wheel should not make the distortion of can flange.This inclined-plane also has the outer circumference surface that guarantees drive wheel can closely cooperate the advantage that can obviously not make the flange distortion with the inside face of flange.

This inclined-plane is preferably about 45 ° the angle of drive wheel axis, but also for example between 30 to 60 °.This inclined-plane of bottom at drive wheel preferably radially extends inwards, and its value will equal the degree of depth of tooth at least.

We also find: wish that the serration on the drive wheel should be superficial, because if serration is dark excessively, the can flange that is easy to bite makes its damage.And tightly embrace the flange top layer, thereby be difficult for prying open tight lid, therefore, the maximum warp-wise degree of depth of tooth or serration must not be greater than 1.5mm, and preferably the warp-wise degree of depth is not more than 1mm.In general, a large amount of shallow, intensive serrations should be arranged.

After processing otch, should be able to take off from the lid that the remainder of can will be obturaged, according to another target of the present invention, this tin opener has a tip of flexibly being pushed to a certain fixed support in the one side, when using the body spare pry-off cap of tin opener, this tip can enter otch, and lifts a side of lid from can.This tip is arranged on the element that flexibly is installed on the pivot, this element is pushed this tip to supporting member, and have an available hand to overcome the arm that elastic force moves it, for enlarge and should the tip and supporting member between the crack, allow at the very start they to be enclosed within on the can flange.

Hereinafter explain an embodiment of tin opener of the present invention with reference to corresponding accompanying drawing, wherein:

Fig. 1 is the lateral plan of tin opener;

Fig. 2 is its birds-eye view;

Fig. 3 is its planar view;

Fig. 4 is its lateral plan of seeing from opposite side;

Fig. 5 is its cross-sectional partial enlarged drawing of getting along Fig. 2 5-5 line;

Fig. 6 represents to use the lateral plan of the first step that tin opener opens a tin;

Fig. 7 is the partial enlarged drawing of doing around the scope of Fig. 6 mark 7 about a kind of can;

Fig. 8 represents the partial enlarged drawing similar to Fig. 7 to another kind of can;

Fig. 9 is the local amplification view of being got along Fig. 4 9-9 line;

Figure 10 represents the birds-eye view that tin opener is shown in an open position;

Figure 11 represents that throw of lever is in the planar view of the tin opener of open position;

Figure 12 represents to take off the thin portion amplification sectional elevation that second of can ends goes on foot;

Figure 13 is the local amplification view of being got along Fig. 1 13-13 line.

Tin opener 10 shown in the drawings comprises a pair of

handle

12 and 14 of making one respectively with body part 8 and 6, body part 8 and 14 is around sleeve pipe 20(Fig. 5) mutually rotate, sleeve pipe 20 fuses with body part 16 and extend in the respective openings 22 in the body part 18.

Axle 24 is passed sleeve pipe 20, and the one side is made drive wheel 26.Drive wheel outer surface has tooth 27, makes its chucking can flange 29 inboards, and when drive wheel rotates, tooth will drive tin opener 10 around can be opened 30.During use, the bottom of drive wheel 26, promptly there are a chamfering or inclined-plane 26a in the limit near can ends, and the angle of this chamfering or inclined-plane 26a is about 45 °, and it highly is slightly larger than the flank of tooth or tooth 27.

The opposite side of axle 24 links to each other with escapement 31, and this escapement is driven by ratchet 32, and ratchet 32 is subjected to the motion control of the throw of lever 33 that hereinafter will describe.

Axle 24 can be rotated in the steel bushing 28 in embedding sleeve 20, have on the position 28a and 28b of certain intervals in the end of axle 24 near steel bushing 28, its diameter and steel bushing no-float, provide good swivel bearing with this to axle, but reduced at 28c place, the centre of axle, so that leave gap 28d between axle 24 and sleeve 28, this gap radial distance is about 0.4mm.Because axle do not contact in the centre with steel bushing, thereby axle is when rotating, and this position can not produce friction, and the slidingsurface of can pack in the 28d of gap grease lubrication position 28a and 28b.Since at these two positions, the inside of steel bushing and axle outside no-float, thereby good swivel bearing is provided.Be the power of reducing friction, wish that outside face with the inside face of steel bushing and axle hardens and is tempered to HRC56.

As shown in Figure 5, the axis 34 of axle 24 departs from the axis 36 of sleeve 20, like this, and when

handle

12 and 14 opens up into position shown in Figure 10 by

part

16 and 18 around sleeve 20 rotations, drive wheel 26 is removed cut-off wheel 40, so as can to make its flange that places can be opened 29 above; Otherwise when tight, drive wheel 26 just shifts near cut-off wheel 40, and can flange 29 is clamped between these two wheels when handle flocks together as shown in Figure 2 and with holding of user.

Be rotatably mounted and be throw of levers 33 around axle 24 with the axle head 24a fix in position of axle 24.In position shown in Figure 3, throw of lever 33 flushes with arm 14 and is similar in line.In this connection structure, arm 14 has groove 14a(Figure 11 of a longitudinal extension), 33 on arm goes in the groove and with its high precision to cooperate.

The spring (not shown) pusher arm 33 that works between throw of lever 33 and body part 16 with its two ends makes it to leave arm 44, but throw of lever 33 can constrain in position shown in Figure 3 with the locking ring 34 that is connected in rotationally on arm 14 ends, therefore, ring 34 makes handle 14 and arm 33 lump together in this position, and it is moved together.When arm 14 is separated open loop 34, arm 33 is just flicked open position, as shown in figure 11.

As indicated above, escapement 31 usefulness key 31a are connected to the end of axle 24, escapement 31 is meshed with ratchet 32 in flexibly being installed to arm 33 groove 33a, the end 32a of ratchet 32 and the tooth 31b of escapement engagement, spring 35 promotes ratchet 32 and makes the common and tooth 31b engagement of its end 32a, therefore, when separating decylization 34 and make arm 33 leave arm 14, arm 33 can be swung between open position shown in Figure 11 and make position shown in Figure 3, when throw of lever when open position is removed, ratchet 32 will mesh drive spindle 24 with tooth, rotate thereby drive drive wheel 26; And when throw of lever is shifted to open position, ratchet will slip over the tooth on the escapement, and the rotating drive wheel 26.

For being fit to different users, the arm opening degree of drive wheel 26 can be selected, and for example the user can only hold tin opener with one, and presses a small amount of simple truck live lever arm of the direction shown in Figure 11 arrow 36.The another kind of scheme person of being to use also can use two hands, and one holds

handle

14 and 16, and the another hand moves to big as far as possible distance with throw of lever 33, for example moves 180 ° by the direction shown in Figure 11 arrow 37.

Anchor shaft 44 is made one (Fig. 8) with fuselage part 18, and cut-off wheel 40 is installed on idle running ground on it, and this cut-off wheel comprises a round cutting edge 46 and whole circular rim 48.The slightly larger in diameter of the external cylindrical surface 49 of circular rim 48 is in the diameter of cutting edge 46, so that the face of cylinder 49 can be pressed on the upper side wall 50 of can 30, this circular rim thereon the surface also have a slight inclination, with the pattern limit 51 that engages below of can flange 29, pattern limit 51 becomes 80 ° of angles approximately with the rotation axis of cut-off wheel, also can say so between 75 ° to 85 °.Importantly limit 51 will enter into usually than below the flange 29 of the diameter big 1 to 1.5mm of sidewall 50, when needing, by hereinafter described can mobile cut-off wheel 40.

Cut-off wheel 40 is by riveted joint or be fixed to the end cap 52 of axle on 44 with screw thread it is fixed on the axle 44, at end cap 52 with take turns the spring washer of being made by elastomeric material 54 is housed between 40; Thin metal washer 55 then is housed at packing ring 54 with between taking turns 40.

With reference to Fig. 7 and Fig. 8, the structure of the detailed flange that shows can 30 29 among the figure.The top of can sidewall 50 curves " U " shape, meanwhile, the limit of lid 62 is around the bending of the inside of sidewall, climb over the top of curved sidewall, walk around the outside of the sweep at 63 places, position then downwards, make its end crooked inward at last, with the top of curved sidewall it is clamped, 63 sweep is exactly to be cut the part that sword 46 cuts at the position for lid 62.

The surface 64 of fuselage 18 between cut-off wheel 40 and drive wheel 26 is flat, and the rotation axis of these two wheels of crosscut.As shown in figs. 1 and 4, the lower surface of handle 14 65 is in same plane with surface 64, and therefore, when fuselage partly reached corresponding handle rotating opening and makes can flange 29 can enter between drive wheel 26 and the cut-off wheel 40, the top of flange 29 can lean against on the surface 64.Because surface 64 width that traverse body part 16 are straight, the part of this surface support on flange will make axis 45 and can vertical axis centering.In addition, when

handle

12 and 14 is opened to as shown in figure 10 position, when perhaps even also wanting bigger position, the part (shown in Figure 10 dotted line) that leans against on the flange 19 can be strengthened in surface 65, thereby helps to guarantee this centering.

In the outer end of body element, be shaped on the integral body projection 76 of elongation downwards, this projection has a smooth following mating surfaces 78 that connects.The amount that projection 76 extends downwards is approximately equal to and is positioned at the height that covers the above flange 28 of 62 upper surfaces, like this, when tin opener is placed on the flange 29 of can be opened, because contact surface 78 leans against and covers on 62, just can guarantee that the pivot center 45 of cut-off wheel 40 parallels with the vertical axis of can exactly.

Cover at 62 o'clock pulling down, at

first forwarding handle

12 and 14 directions along arrow 70 indications (Fig. 2) to position shown in Figure 10 opens it, arm 33 is encircled 34 constraints and is moved with arm 14, at this moment, opens a gap as mentioned above between drive wheel 26 and cut-off wheel 40.Tin opener can be placed on then flange 29 is between the

wheel

26 and 40, make handle get back to make position shown in Figure 2 subsequently, flange 29 is stuck between the

wheel

26 and 40, the tooth that makes drive wheel is the inboard that the flank of tooth 27 is tightly bitten flange, meanwhile, force cutting edge 46 to pass the lid at 63 places, position.

That had explained as mentioned is such;

Surface

64 and 65 can guarantee that cutting edge 46 is around flange 29(annular incision to be made thereon) accurately levelling; Contact surface 78 contacts with the top of lid 62 and can guarantee that cutting edge 46 is along wedging in the lids with the upright side walls 60 accurate rectangular directions of can.

Then, rotating drive wheel 26, tin opener is moved in a circle around can, 23 make the complete annular incision that passes lid at the position, this can make throw of lever 33 open up into position shown in Figure 11 to realize by take ring 34 from throw of lever 33, then, repeat to move to make position shown in Figure 3 from open position shown in Figure 11.As indicated above, when arm 33 is shifted to make position, drive wheel 26 will rotate, and meanwhile, this arm outwards ejects under the effect of spring again, but can not make drive wheel along contrarotation.

Clearly visible from Fig. 7, when handle was closed fully, the limit 51 of wheel rim 48 had been snapped to the base of flange 29, and the external cylindrical surface 49 of wheel rim 48 contacts with the outside face of can sidewall 50.Difference is very big between the height d can of flange 29 and the can, even same can is also inequality, and this may cause cutting inconsistent.For avoiding this situation, can see: if height d greater than the contemplated minimum value of Fig. 7, i.e. situation as shown in Figure 8, so cam surface 51 still the following interlock of flange 29 and with cut-off wheel 40 toward drop-down, compression washer 54.Remaining unchanged apart from a between cutting edge 46 and flange 29 bottoms, this yes roller edge 48 and cutting edge 46 relative positions are determined, thereby can be obtained uniform cutting effect.

In case formed complete annular incision, just arm 33 is back into make position shown in Figure 3, and be fixed on the there with ring 34, then

handle

12 and 14 being opened separates can, meanwhile, if cut-off wheel is removed from position shown in Figure 8, packing ring 54 is just got back to its position shown in Figure 7.

Make the vertical arched arm 66 that has of one with body part 18, the axis centering of its axis and axle 44, the angle that this arcwall extends is 180 °, the both sides of online A (Fig. 2) respectively account for half, and line A is the extended line of cut-off wheel 40 and drive wheel 26 lines when tin opener is in position shown in Figure 2.The angle that wall 66 extends is the amount doesn't matter, and for example approximately from 45 ° to 220 °, the both sides of online A remain and respectively account for half, in fact, if the angle of elongation surpasses 180 °, can make the assembling of tin opener produce difficulty.180 ° is optimum value, because at this moment this arcwall is not only that bolster prevents straight line between its Bending Deviation cut-off wheel axis and the drive wheel axis, and bolster prevents axle lateral bending when tin opener processing otch.

Shown in Fig. 7 and 8, the diameter on surface 68 is approximate in this arcwall equates with the external cylindrical surface 49 of wheel rim 48, therefore, surface 49 is against surface 48, when cutting operation, this arc wall energy bolster 44 produces obviously distortion to avoid axle 44 like this, prevent that cutting edge 46 and flange 28 are not parallel, although fuselage part 18 and with its all-in-one-piece axle 44 be that also not having of being molded into of synthetic plastic is anti-.

When taking off tin opener 10, lid 62 is still intactly stayed on the can, uses the mechanism that is contained on tin opener 18 1 sides 80 that it is pried open, and just it can be taken off.

As shown in figure 13, mechanism 80 comprises fixed support 82 and elastomeric mounting Fastener 84.This supporting member 82 is fixed on the body part 18, and comprises a vertical abutment wall 86, and part 84 can rotate around the little fixator pins 90 of form in the groove 92 of body part 16 relative to being mounted to.Part 84 also comprises throw of lever 94 and outstanding forward tip 96, and spring 98 thrust pieces 84 make its tip 96 press to arm 86.

When mechanism 80 being placed on the can flange shown in Figure 12, the user can spur arm 94, gap between tip 96 and the arm 86 is strengthened, position shown in Figure 12 solid line, thereby the upper end of can flange can enter between the two, but user's release arm 94 then, spring 98 is pressed to wall 86 with tip 96, nipped in the tip to be in to cover and make in the otch on 62 the lid at position 64, it is the position shown in Figure 12 dotted line, the elastic force of spring 98 makes most advanced and sophisticated and wall is close together, and guarantees that this tip enters and is stuck in this otch.

Then, with the handle 12 of tin opener and 16 sled upwards, the remaining part that can is left with regard to the cut-off parts that forces lid in the tip 96 below the otch of nipping is opened can.

Claims

1, a kind of tin opener, be used to open the can that lid and can main body link together with flange, in this opener, can is to open by the outside of the flange of cutting connection cover and can main body, this tin opener comprises the cut-off wheel with described flange external engagement and cutting of being used for of a rotatable supporting, be used for the rotatable drive wheel of interlock flange in-to-in, this flange is clamped on device between cut-off wheel and the drive wheel, when rotating with convenient drive wheel, this tin opener is around the rotation of can flange, cut-off wheel can cut an otch around the outside of flange simultaneously, and the leverage that drives free-wheel clutch, this leverage is used for the rotation driving makes tin opener advance around can.

2, according to the described tin opener of claim 1, it is characterized in that this fixing device comprises a pair of pivoted body spare, this has from the outwardly directed arm of pivot(ing) point body spare.

3, by claim 1 or 2 described tin openers, it is characterized in that leverage comprises that the 3rd arm is lever, this arm also can move between closure and open position around the pivot axis of drive wheel, when this arm is shifted to open position, because free-wheel clutch rotates freely, so drive wheel is rotated; When this arm was shifted to the make position of a close arm of body spare, this power-transfer clutch then drove the drive wheel rotation.

4, according to the described tin opener of claim 3, it is characterized in that this throw of lever flexibly pushed to open position by spring installation, make it to be in the position of preparing the rotating drive wheel.

5, according to claim 3 or 4 or 2 described tin openers, it is characterized in that having blocking device, throw of lever is locked near one make position in the described arm of body spare.

6, require any described tin opener according to aforesaid right, it is characterized in that free-wheel clutch comprises an escapement by the elastomeric mounting of leverage driving, this escapement be meshed at the tooth of making on the axle of drive wheel or be fixed on this axle, this escapement is along a counterrotating direction and tooth engagement or locking, along oppositely rotating freely and slip over this tooth.

7, require any described tin opener according to aforesaid right, it is characterized in that drive wheel is supported by metal shaft, this metal shaft rotatably is contained in the metal sleeve by the supporting of the body of tin opener, the outside face of axle and sleeve interior surface match at the two ends near this sleeve, so that provide swivel bearing to axle, those parts of centre between the inside face of the outside face of axle and sleeve leave the gap, to avoid axle and sleeve direct contact.

8,, it is characterized in that the inside face of sleeve and the outside face of axle are the steel that hardens according to the described tin opener of claim 7.

9, according to the described tin opener of claim 8, the outside face that it is characterized in that the inside face of sleeve and axle quenches and is tempered in the scope of Rockwell hardness (HRC) 45-56.

10, according to any described tin opener of claim 7 to 9, it is characterized in that the interior cross-sectional diameter of sleeve is changeless; And between all zones that axle contacts with sleeve, axle has the zone of a reduced, so that described gap is provided.

11, require any described tin opener according to aforesaid right, it is characterized in that being provided with and make cut-off wheel along the axial direction resilient movement of its rotation axis ground springing, with be connected with cut-off wheel, the between centers cut-off wheel leaves the copying system of certain intervals, this copying system is arranged to fit with the bottom of flange, be fitted in and make copying system and cut-off wheel head on springing below the flange to move to some positions, make cut-off wheel substantially invariable distance on make an otch from the bottom of flange toward flange.

12, are described tin openers according to claim 11, it is characterized in that this copying system comprises an annular flange, its upper surface slight inclination in the perpendicular plane of the axis of this flange and be fitted in flange below.When the can flange is held under the arm between cut-off wheel and drive wheel, when being used for this wheel rim and being in flange following, the cut-off wheel that this inclined upper surface is attached thereto annular flange overcomes springing and moves, simultaneously, and the outside that firmly makes the cutting edge of cut-off wheel pierce through flange.

13,, it is characterized in that annular flange and cut-off wheel made by a block of material according to the described tin opener of claim 12.

14,, it is characterized in that annular flange and cut-off wheel separate manufacturing and then fuse, so that they rotate together and move together along its rotation axis according to the described tin opener of claim 12.

15,, it is characterized in that on its shared S. A. of installation that annular flange and cut-off wheel fuse according to any described tin opener of claim 12 to 14.

16,, it is characterized in that springing comprises a caoutchouc packing ring that is installed between copying system and the fixed bearing according to any described tin opener of claim 11 to 15.

17, according to above-mentioned any described tin opener, it is characterized in that cut-off wheel can be rotated to support on from fixing device vertically stretch out the axle on, on the described axle annular flange of diameter greater than cut-off wheel is housed, vertically stretch out from fixing device, the arc supporting wall concentric with the rotation axis of cut-off wheel, this annular flange is arranged to lean against on this abutment wall, helps bolster and cut-off wheel when cutting can flange.

18, require any described tin opener according to aforesaid right, it is characterized in that fixing device makes with synthetic plastic.

19, according to claim 17 and 18 described tin openers, it is characterized in that axle be with artificial plastic production and make one with fixing device.

20,, it is characterized in that axle and fixing device separate according to claim 17 or 18 described tin openers.

21, according to any described tin opener of claim 17 to 20, it is characterized in that annular flange is positioned at the outside of cutting edge.

22, require any described tin opener according to aforesaid right, it is characterized in that fixing device comprises the body spare of a pair of mutual rotation, and have along leaving the integral handle that the pivot center direction is extended, the surface that has a flat substantially wall in the zone in a gap between cut-off wheel and drive wheel in a pair of body spare, the integral handle of another body spare has the flat substantially surface on a flat substantially wall and basic and the above-mentioned body spare to be in lower surface in the same plane, thereby, when body spare and integral handle thereof are rotated on pivot, tin opener is fixed on the can flange, those two surfaces will lean against on the top of can flange and the axis of centering cut-off wheel, so that at least in the plane of containing these two axis, the axis of cut-off wheel parallels with the vertical axis of can.

23,, it is characterized in that a body spare of described supporting cut-off wheel has another contact surface on a side of the drive wheel relative with cut-off wheel according to the described tin opener of claim 22.

24, according to the described tin opener of claim 23, the position that it is characterized in that this mating surfaces is to leave certain distance downwards from the surface that is positioned at the described substantially flat on the described body spare, and its distance value equals the height of the flange above the can ends top center district substantially.

25, require any described tin opener according to aforesaid right, it is characterized in that drive wheel has an external cylindrical surface, be shaped on tooth on it, this tooth is nipped in the material of flange, help to drive tin opener and rotate around can, the bottom of the close can ends of the external cylindrical surface of drive wheel is a bevelled during use.

26,, it is characterized in that the relative drive wheel axis in inclined-plane becomes 30 to 60 ° of angles according to the described tin opener of claim 25.

27, according to claim 25 or 26 described tin openers, it is characterized in that the inclined-plane the bottom of drive wheel radially inwards the amount of elongation equal the degree of depth of tooth at least.

28,, it is characterized in that the maximum radial degree of depth of tooth is not more than 1.5mm according to the described tin opener of claim 27.

29, a kind of tin opener has a tip of flexibly being pushed to certain fixed support in the one side, and when using the body spare pry-off cap of tin opener, this tip can enter otch, and lifts a side of lid from can.

30, according to the described tin opener of claim 29, it is characterized in that this tip is provided with on the pivoted element, this element is for pushing this tip to supporting member by elastomeric mounting, and be provided with an available hand and overcome the arm that elastic force moves it, in order to enlarge the crack between this tip and the supporting member, allow at the very start they to be enclosed within on the can flange.