CN101821172A - Plastic cap with pouring protrusion - Google Patents

Abstract

A kind of plastic cap of toppling over cylinder that has is provided, and under the occasion that the container lean degree when toppling over carrying liquid more or less changes, it can carry out toppling over of carrying liquid smoothly and can easily regulate liquid measure according to certain liquid width.The characteristics of plastic cap are, in the upper end of being located on cap body (1) top board (5) of toppling over cylinder (11), form outward-dipping outstanding sharp mouth (20), the bottom of toppling over the interior table 1 of cylinder (11) forms the sealing surfaces (17) of general cylindrical shape, on the inside face of the sharp mouth (20) of toppling over cylinder (11), form the groove (30) that extends to sharp mouth (20) upper end from the upper end of sealing surfaces (17), and on the inside face of loam cake (2), be formed on loam cake (2) when closed with sealing surfaces (17) the closed contact seal ring (29) of toppling over the inside face of cylinder (11).

Description

Plastic cap with pouring protrusion

Technical field

The present invention relates to have the plastic cap (for example toppling over cylinder) of pouring protrusion, when the liquid in the container was toppled over, pouring protrusion was as guiding piece.Exactly, the present invention relates to plastic cap, be formed with outwards outstanding sharp mouth in the upper end of pouring protrusion as pouring opening.

Background technology

Having the plastic cap of toppling over cylinder that becomes guiding piece when toppling over liquid in container is widely used.The representative of such plastic cap has so structure, but is hinged on the loam cake on the cap body with for example comprising the cap body that is fixed to container finish and open closed, wherein is provided with on the cap body and topples over cylinder.That is to say, the cap body has cylinder side wall (lateral margin) and is configured to the top board of the upper end of energy closed circle tubular sidewall, topple over cylinder and on the upper surface of top board, form, and being toppled on top board formed the opening predetermined portions of being divided with the ring-type indentation in the cylinder region surrounded.Form opening by tearing at the indentation that is fixed on the cap body of container finish.If topple over liquid in container by opening, topple over the liquid that and flow along the wall of toppling over cylinder, for example, liquid is toppled over swimmingly and is not scattered and splash.

At above-mentioned toppling in the cylinder, general, at least a portion of its upper end is outwards outstanding crosses the root of toppling over cylinder and forms pouring opening, and the upper end image angle of pouring opening is equally outwardly-bent.Yet in recent years, proposed to form a kind of sharp mouth as pouring into oral area, this point mouth formation portion outwards gives prominence in the upper end of toppling over cylinder and obviously, by forming this point mouth, the known liquid shear performance (referring to patent documentation 1 and 2) of having improved.

Also propose a kind of cap, formed the part of elongated evagination from the lower end to the upper end on the part of cylinder toppling over, carried out the toppling over of liquid (referring to patent documentation 3) of institute's splendid attire by this part.

Patent documentation 1:JP-A-2003-40299

Patent documentation 2:JP-A-2004-352284

Patent documentation 3:JP-A-2007-131352

Summary of the invention

The problem to be solved in the present invention

But, as in patent documentation 1 and 2, the plastic cap that is formed with sharp mouth in toppling over cylinder has good liquid shear performance, if but very little variation only takes place in the container lean degree when toppling over carrying liquid, also can cause the change width of toppling over the liquid that from sharp mouth.As a result, topple over yardstick (area) marked change that the liquid that falls part.Particularly, such problem does not take place, but when liquid falls the yardstick increase of part, carrying liquid may occur and may drop on the such inconvenience of not expecting of part when reducing in the yardstick that falls part at liquid.

On the other hand, as in the patent documentation 3, be formed in the cap of toppling on the cylinder at elongated protrusion, unless the container lean degree is big, otherwise the liquid that can not of institute's splendid attire topples over, the result, and this is not suitable for toppling over small amount of liquid.In addition, the liquid that is many owing to toppling over, and is still become according to the change of container lean degree easily so topple over the width of the liquid that, and to the liquid shear performance that obtains too high expectation can not be arranged.

And about the cap in the patent documentation 1 to 3, when the amount of toppling over of pouring liquid when being constant, sharp mouth and elongated protrusion can be worked effectively, but can't be along with the variation of the amount of toppling over of the liquid of institute's splendid attire and become.For example sharp mouth is designed to can finish when toppling over small amount of liquid topple over swimmingly from sharp mouth and liquid, and when a large amount of pouring liquid in wide-angle tilt container ground, sharp mouth can not effectively be worked.For example, liquid even can topple over from the part beyond the sharp mouth, liquid pouring is unsettled, liquid can not successfully be sheared.In addition, if be designed to when a large amount of pouring liquid can smooth and easy pouring liquid for sharp mouth, toppling under the small amount of liquid occasion so, liquid also can be poured out swimmingly.But have in this case sharp mouth and elongated protrusion are configured to unnecessary large scale.Therefore, consider that from the convenience angle of ordinary consumer the space still has greatly improved.

Therefore, the purpose of this invention is to provide a kind of plastic cap with pouring protrusion, also can topple over the liquid that institute's splendid attire swimmingly under the situation that this pouring protrusion can the container lean degree when the liquid pouring of institute's splendid attire more or less changes, and this pouring protrusion also becomes the guiding piece of the pouring liquid with good fluid cutting performance with stable liquid width.

Another object of the present invention provides a kind of can both keep stable liquid pouring and the outstanding plastic cap of convenience smoothly when liquid is toppled on a small quantity or in a large number.

The means of technical solution problem

According to the present invention, a kind of plastic cap is provided, comprise cap body that is fixed to container finish and the loam cake that can open and close to be installed on the cap body, the lateral margin that the cap body has top board and extends downwards from all genesis of top board, top board has opening or the prodefined opening zone that is used to topple over liquid in container, in the upper surface of this top board, the ring-type kick that forms pouring protrusion and be used for engaging in the outside in this opening or prodefined opening zone with loam cake, pouring protrusion is as toppling over the guiding piece of liquid in container and the outside that the ring-type kick is positioned at this pouring protrusion, wherein, the point mouth is formed on the upper end of pouring protrusion, the point mouth is tilted to outstanding outward and sees triangular in shape from the top, the bottom of the inside face of this pouring protrusion forms the sealing surfaces that in the vertical direction extends, extend to the groove of the upper end of described sealing surfaces from the upper end of described sharp mouth forming, and on the inside face of described loam cake, be formed on loam cake when closed and the seal ring of sealing surfaces closed contact from the inside face of pouring protrusion.

Plastic cap of the present invention can adopt following examples.

(1) pouring protrusion has columnar shape.

(2) inside face of the described sharp mouth of described pouring protrusion forms the outward-dipping inclined surface that makes progress from the upper end on sealing surface, on the side section at the circumferential center of this point mouth, see that described inclined surface is configured on half height at least of described pouring protrusion.

(3) described opening or prodefined opening zone are configured to the shape that the part that is positioned at this point mouth opposite side has the pouring liquid throttling range of little width.

(4) from the top, described groove comprise the big liquid measure that extends to the upper end of described sharp mouth from described sealing surfaces topple over guiding with slot part, this big liquid measure topple over guiding with within the slot part, topple over than big liquid measure guiding little but dark with the width of slot part and extend to low consumption of the liquid on the sharp mouth or medium liquid measure from the upper end on sealing surface and topple over to guide and use slot part.

(5) this big liquid measure topple over guiding be formed with the inboard of slot part topple over than this big liquid measure little but dark with the width of slot part and the medium liquid measure extend to sharp mouth upper end from the upper end on sealing surface of guiding topple over guiding topple over slot part with than this medium liquid measure guide little but dark and extend to low consumption of the liquid on the sharp mouth from the upper end on sealing surface and topple over to guide and use slot part with the width of slot part.

(6) on the inside part of the pouring protrusion of described top board, be formed with the recess that caves in most in the middle part, described opening or prodefined opening zone are formed at described recess, form the stream of toppling over of taper convergent towards the root ground of described pouring protrusion from the pouring liquid throttling range in described opening or prodefined opening zone, topple on the extended line of stream in this middle part of described groove.

(7) be formed with buffer protrusion on the outside face of described pouring protrusion, this buffer protrusion is positioned at the below of this point mouth and outwards gives prominence on engaging with the high part of annular kick than this loam cake.

(8) described buffer protrusion be positioned at described sharp mouth lower end near, and the radial outside end of described buffer protrusion is positioned on the position identical with the radial outside end of sharp mouth or outer slightly.

(9) described loam cake is hinged on the upper end of described lateral margin, and this point mouth is formed on the opposite side part of the part that is hinged with this loam cake and this lateral margin.

(10) the radial outside end of this point mouth is with contiguous when loam cake is closed but not contact the degree of inner peripheral surface of lower end of this loam cake outstanding.

(11) form the double-walled construction that comprises inner and outer wall at least a portion of lateral margin, inner and outer wall interconnects by lacerable weakenings in its lower end, and the articulated section is formed on the outer wall.

(12) on the outside of this articulated section one side's side of this lateral wall, form axially extended and lacerable axial indentation, be formed with on the part of axial indentation, on the top and bottom of this outer wall, all be formed with otch, on the bottom of inner and outer wall, be formed with lower end with axial indentation and be starting point and tear along circumferentially one side at another side place is extended towards the articulated section the initiation region with tear tearing that the initiation region links to each other and carry out the zone, the inwall in tearing the initiation region is set to than in that to tear the Joint strenght that carries out in the zone low relatively with the Joint strenght of outer wall.

The invention effect

Plastic cap of the present invention has important being characterised in that, forms groove at the inside face from the outside sharp mouth of giving prominence to of pouring protrusion, and this groove extends up to the upper end of sharp mouth from the upper end of sealing surfaces.This groove is used for the liquid that throttling is poured out.Therefore,, also can topple over carrying liquid, therefore, can easily regulate toppling over of carrying liquid so that constant liquid width is smooth and easy even the container lean degree when toppling over carrying liquid has certain variation.For example, though container lean largely and big quantity of fluid be poured out, liquid is also by the groove throttling.Therefore, the width of the liquid of pouring out from sharp mouth is not always to change, and can not increase at the liquid area at the liquid place of falling.

And the inside face of sharp mouth is positioned at from the outward-dipping inclined surface in the upper end of almost vertical sealing surfaces, this inclined surface of groove extend past.Therefore, need not tilt container largely, get final product pouring liquid.

In addition, in the present invention, in groove, be formed for big liquid measure and topple over the guiding slot part.Toppling over guiding in big liquid measure further forms low consumption of the liquid in slot part and topples over guiding and topple over to guide with slot part and medium liquid measure and use slot part.Therefore, can topple over swimmingly and liquid, and by big degree tilt container so that during a large amount of pouring liquid or by the slight inclination container so that when toppling over gobbet, prevent the liquid change width.

Description of drawings

Fig. 1 is the planar view with the plastic cap of toppling over cylinder of the present invention that is illustrated under the upper cover part open mode.

Fig. 2 is the lateral plan (A-A cross section) that having of Fig. 1 toppled over the plastic cap of cylinder.

Fig. 3 is the lateral plan with the plastic cap of toppling over cylinder of the Fig. 1 under the loam cake closure state.

Fig. 4 is the transparent view of plastic cap when observing the cap body from bevelled top, wherein is formed with opening by tearing the indentation in the plastic cap that having in Fig. 1 topple over cylinder on top board.

Fig. 5 shows the planar view of main portion that having among Fig. 1 toppled over the plastic cap of cylinder with the enlarged view form.

Fig. 6 is an enlarged side view (B-B section drawing) of toppling over the sharp mouth part of cylinder shown in Figure 4.

Fig. 7 is the planar view that shows another embodiment of sharp mouth with the form of enlarged view, and this point mouth is the main portion that having among Fig. 1 toppled over the plastic cap of cylinder.

Fig. 8 is the planar view of the plastic cap of the present invention that is provided with buffer protrusion under the loam cake open mode.

Fig. 9 is the lateral plan (A-A section drawing) of the plastic cap of Fig. 8.

Figure 10 is the lateral plan that the buffer protrusion of plastic cap shown in Figure 8 is seen from the side.

Figure 11 is the lateral plan of buffer protrusion from seeing previously of plastic cap shown in Figure 8.

Figure 12 is the backplan of plastic cap shown in Figure 8.

Figure 13 represents not have the state of the finger of plastic cap when loam cake is opened of buffer protrusion.

Figure 14 represents the state of the finger when the loam cake of plastic cap shown in Figure 8 is opened.

Figure 15 shows the state of the cap when using plastic cap among Figure 13, that do not have buffer protrusion that carrying liquid is transferred to small container.

The state of the cap when Figure 16 represents to use the plastic cap of Fig. 8 that carrying liquid is transferred to small container.

Figure 17 is the lateral margin at the cap body is divided into the cap under the state of inner and outer wall by slit S a backplan, and inner and outer wall is by linking together by open circuited bridging part.

Figure 18 is that the plastic cap among Figure 17 is formed with indentation and the lateral plan under the avulsed state of bridge portion between the inner and outer wall in lateral wall.

Figure 19 is the birds-eye view of cap under the state of Figure 18.

The specific embodiment

Referring to Fig. 1 to Fig. 4, cap comprises cap body 1 and the loam cake 2 that is hinged on the cap body 1.Such cap is made (see figure 2) by the injection mo(u)lding that utilizes known synthetic resin own under loam cake 2 open modes, synthetic resin for example comprises olefin resin such as basic, normal, high density polyethylene, linear low density polyethylene, isotactic polypropylene, ethylene/propene copolymer, Polybutene-1, ethylene/butylene-1 copolymer, propene/but-1-ene-1 copolymer or ethylene, or polystyrene, styrene/butadiene copolymers, ABS resin, thermoplastic polyester or polyamide.

Cap body 1 comprises top board 5 and from the sagging lateral margin 6 of the periphery of top board 5.Loam cake 2 is hinged to the upper end of lateral margin 6.The articulated section is by Reference numeral 7 expression, and comprise be connected to lateral margin 6 upper ends in the middle of band 7a and be positioned in the middle of band 7a both sides and be connected to a pair of subband 7b on the part that is lower than lateral margin 6 upper ends slightly.Like this, be hinged to loam cake 2 on the lateral margin 6 by upset, the top board 5 of cap body 1 is by loam cake 2 closures.

In addition, near the two ends of the shallow slot 7c of rectangle band 7a in the middle of the top surface side of the pars intermedia of centre band 7a extends to always.It is in order to strengthen the easy bending of hinge that groove 7c is set.Even if not extending to hinge two ends landform grooving 7c is that hinge can not rupture yet in order repeatedly to open and close loam cake.

Especially referring to Fig. 2, on the inside face of cap body 1 lateral margin 6, form copulational protuberance 8, ring 9 on the peripheral part of top board 5 inside faces, forming, interior ring 9 opposite side edges 6 leave the compartment of terrain and extend downwards.In other words, the container finish (not shown) is fitted into the space between interior ring 9 and the lateral margin 6, and passes through the joint of the outside face of copulational protuberance 8 and container finish, and cap body 1 firmly is installed to container finish.

Have, lateral margin 6 is formed with the slit S that extends from the top down on its heavy section again, and by this slit S, lateral margin 6 becomes the double-walled construction that is divided into inwall 6a and outer wall 6b.As shown in Figures 2 and 3, inwall 6a and outer wall 6b interconnect in the lower end.By lateral margin 6 is configured to double-walled construction, when abandoning cap separately, can easily take off cap from container finish.

What be formed on the guiding that becomes pouring liquid when toppling over carrying liquid on the upper surface of cap body 1 top board 5 topples over cylinder 11.As from understanding Fig. 2 and Fig. 3, in the inside portion of toppling over cylinder 11, top board 5 forms the recess that caves in as cup.And referring to Fig. 1, the annular indentation 12 that is used for forming pouring opening is formed in the recess, is used for destroying the draw ring 15 of indentation by being formed on the outside face that is arranged on top board 5 as the pillar 14 of annular indentation 12 area inside.That is,, make indentation 12 fractures, as shown in Figure 4, in top board 5, form pouring opening, and liquid in container can be toppled over by pouring opening by pull-up draw ring 15.

Therefore, from toppled over cylinder 11 guiding because of the carrying liquid that flows out the indentation 12 disrumpent feelings pouring openings that form, be poured out along its inside face.Especially know from Fig. 2 and Fig. 3 that topple over cylinder 11 and becoming short with loam cake 2 pivotallys attached one side, the top 11a of this short part is outward-dipping.This is for this is toppled over cylinder 11 and does not constitute obstruction when loam cake 2 is closed.

In addition, the bottom on the inside face of toppling over cylinder 11 is flat on whole circumference and forms roughly vertical sealing surfaces 17.When loam cake 12 was closed, the part of loam cake 2 and sealing surfaces 17 closed contacts guaranteed by the leak tightness after indentation 12 being broken form pouring opening.

On the part of a side opposite with articulated section 7 of toppling over cylinder 11, the part of upper end is outward-dipping, and forms with the outwards outstanding sharp mouth 20 of triangle, shown in the planar view of Fig. 1 and Fig. 4.The leading section 20a (the most outstanding upper end pars intermedia) of point mouth 20 is positioned on the cap line of centers X through 7a center, articulated section, constitutes vertex of a triangle.The bottom of the inside face of this sharp mouth 20 (corresponding to the leg-of-mutton bottom side portion that is formed by sharp mouth 20) is positioned at the upper end of sealing surfaces 17, and the inside face of sharp mouth 20 becomes from the acclivitous inclined surface 20b of this part.Like this, the sharp mouth 20 obviously outwards more outstanding than the root of toppling over cylinder 11 becomes pouring opening, pours out carrying liquid by this part, can carry out pouring out of carrying liquid swimmingly.

In addition, as shown in Figures 2 and 3, the upper end attenuation and the image angle of above-mentioned sharp mouth 20 are equally outwardly-bent.That is, except sharp mouth shape, by so being the bending of horn shape, inhibition liquid is attached on this part and improves the liquid shear performance, can effectively prevent under the fluid drips when carrying liquid is toppled over end.

In addition, the ring-type kick 21 that is used to engage loam cake 2 is formed on top board 5 outside faces on the part of toppling over cylinder 11 more laterals.

On the other hand, loam cake 2 comprises top board 25 and the cylindrical sidewall 27 that extends from top board 25 all genesis, and is formed with seal ring 29 on the inside face of top board 25.That is, when loam cake 2 is closed, the outside face of seal ring 29 with at sealing surfaces 17 closed contacts of toppling over below cylinder 11 inside faces, guarantee by the leak tightness behind the indentation 12 fractures formation pouring opening by this closed contact.In addition, become short and outward-dipping owing to topple over the part 11a of articulated section 7 sides of cylinder 11, therefore when loam cake 2 is closed, seal ring 29 enter smoothly topple over cylinder 11 and with sealing surfaces 17 closed contacts.

Have, as shown in Figure 3, the centre portion of loam cake 2 top boards 25 forms the bump 25a that swells as dome again.Under the situation that forms bump 25a, inside face from seal ring 29, the inside face of the top board 25 that is centered on by seal ring 29 is made into not have the arcuate surface at angle, after indentation 12 fractures, can get back in the container rapidly attached to the carrying liquid on top board 25 inside faces.

Have again, on the part of the side opposite of top board 25, form flange 25b, allow loam cake 2 easily to open and close whereby with articulated section 7.As from understanding Fig. 3, flange 25b is located at the upper end of cylinder side wall 27.Therefore, when opening loam cake 2, finger is difficult to touch the leading section 20a of the sharp mouth 20 that forms in toppling over cylinder 11.

As shown in Figure 2, on the leading section side (with the part of articulated section 7 opposite sides) on the lower surface of the cylinder side wall 27 of loam cake 2, kick 27a is set according to appropriate intervals ground.That is, when toppling over carrying liquid, toppled over the liquid that and to be attached on the peripheral part of upper surface of cap body 1 top board 5, especially be attached on the part of an opposite side with articulated section 7b.In the case, when loam cake 2 closures, if the peripheral part closed contact of the whole lower surface of cylinder side wall 27 and top board 5 upper surfaces, then attaching liq will scatter and splash, and the inconvenience that surrounding environment is made dirty occur.Yet,, just can effectively stop scattering of attaching liq to be splashed if form above-mentioned kick 27b.And the 7b side is formed with the arc-shaped protrusions 27b that height adjustment is used in the articulated section of cylindrical wall 27 lower surfaces, in order to the inclination of avoiding being caused by forming of kick 27a.

In addition, on the inside face of cylinder side wall 27 lower parts, along circumferentially being formed with projection 27c.That is, when loam cake 2 was closed, projection 27c engaged also with kick 21 on being formed on top board 5 outside faces and thus loam cake 2 is remained on closure state.

Referring to Fig. 5 that amplifies expression main portion of the present invention and the transparent view of Fig. 6 and Fig. 4, it is important forming groove 30 on the inside face of the sharp mouth 20 of toppling over cylinder 11 simultaneously.Groove 30 extends to the upper end of sharp mouth 20 always from the upper end of sealing surfaces 17.Owing to be formed with above-mentioned groove 30, so in cap of the present invention, toppled over the liquid that by sharp mouth 20 by throttling, for example when carrying liquid is toppled on tilt container ground, the angle of inclination that is Bedpan more or less changes, and sharp mouth 20 also can keep the width of the liquid poured out constant, so the area that liquid falls a little can keep almost constant, can effectively avoid adjusting the amount of pouring out easily because of the increase that liquid the falls area a little inconveniences such as surrounding environment of making dirty.

In addition, because above-mentioned groove 30 is formed on from the outward-dipping inclined surface 20b in the upper end of almost vertical sealing surfaces 17 (inside face of sharp mouth 20), do not need wide-angle tilt container ground to topple over the benefit of carrying liquid so exist.

In the present invention, shown in the sectional view of Fig. 6, sharp mouth 20 inside faces that are formed with groove 30 be inclined surface 20b preferably be configured to up to be no less than at least topple over cylinder 11 half the height.That is,, then will cause such as the necessary wide-angle tilt of container so that the such inconvenience of pouring liquid if the zone of inclined surface 20b is short.In addition, the length of the groove 30 that forms on inclined surface 20b reduces, and the restriction effect that is produced by groove 30 also weakens half.

Better is, considers the complexity of pouring liquid and the demoulding complexity behind cap forming, and the tilt angle theta (see figure 6) of inclined surface 20a is approximately 10 to 55 degree.

Referring to Fig. 1 to Fig. 5, the prodefined opening zone of being divided by the indentation 12 that forms in top board 5 (corresponding to the opening of representing with Z in the drawings) is preferably shape like this, the part of a side relative with sharp mouth 20 has the pouring liquid throttling range Z1 of little width, and groove 30 preferably has the width W much at one with pouring liquid throttling range Z1.That is, by forming pouring liquid throttling range Z1,, further strengthen restriction effect thus from carrying out the throttling of pouring liquid to groove 30 ground by tearing the opening that indentation 12 forms.

And, in Fig. 1 and example shown in Figure 5, prodefined opening zone (or opening) Z is formed on by indentation 12 in the recess of cup-shaped, and pouring liquid throttling range Z1 extends towards toppling over cylinder 11 root taper convergent ground, and this part becomes the groove that more caves in than other parts.In addition, the leading section 20a of sharp mouth 20 (center of groove 30) is positioned on the extended line of pouring liquid throttling range Z1.Therefore when container lean, topple over stream to sharp mouth 20 leading section 20a ground, one tunnel formation, can carry out toppling over and throttling of liquid in container effectively from pouring liquid throttling range Z1.

Referring to the local amplification view of the Fig. 7 that represents other embodiments of the invention, groove 30 preferably is configured to a plurality of steps.Promptly, in Fig. 7, in the inside of the groove 30a of maximum (toppling over the guiding slot part hereinafter referred to as big liquid measure), be formed with groove 30b (toppling over the guiding slot part) hereinafter referred to as medium liquid measure, the width of this groove 30b is littler than the width of groove 30a, but it is darker than it, topple over the inside that guides with slot part 30b in medium liquid measure and be formed with groove 30c (toppling over the guiding slot part hereinafter referred to as low consumption of the liquid), the width of this groove 30c is littler, but darker.These slot parts 30a-30c extends to the upper end of sharp mouth 20 from the upper end of sealing surfaces 17.Like this, constitute groove 30, allow common user to adjust the pouring liquid amount easily by multistage.Specifically, if the container wide-angle tilt is then toppled over guiding by the big liquid measure of big width and is finished liquid pouring with slot part 30a.If the container lean angle reduces, then topple over guiding and carry out liquid pouring with slot part 30b by the medium liquid measure of medium-width, if the container lean degree further reduces, then topple over guiding and finish liquid pouring with slot part 30c by the low consumption of the liquid of minimum width.That is, observe the liquid width of pouring out from sharp mouth 20, common user can regulate container lean degree and correct adjustment and topple over the amount of liquid that.

And, in above-mentioned the present invention, because sharp mouth 20 remarkable evaginations, so, be preferably on the inside face of loam cake 2 and be provided with as the disclosed rib that is used for straightening of JP-A-2004-352284 although not shown.Because I'm afraid that sharp mouth can be out of shape when the demoulding, so, utilize the rib of correcting distortion to correct sharp mouth distortion by closed loam cake behind cap forming.

And in above-mentioned object lesson, prodefined opening zone Z is formed by indentation 12, and pouring opening forms by tearing indentation 12.But do not form indentation, but form pouring opening (being the state of Fig. 4) at the very start, this obviously also is feasible.

In addition,, the person skilled in the art will easily understand, in sharp mouth 20 inside faces, form groove 30 in the present invention, so the present invention also may be used on loam cake 2 by being threadably fastened in the cap on the cap body 1 although loam cake 2 is hinged on the cap body 1.

Except above-mentioned and graphic form, above-mentioned plastic cap of the present invention can present multiple structure.For example toppling under the situation about forming in the upper end of cylinder 11 at sharp mouth 20, when attempting to open loam cake 2 with finger, finger can contact with the sharp end of sharp mouth 20, allows the user not feel well.Yet this sense of discomfort can be eliminated by buffer protrusion is provided.An example of the cap with buffer protrusion has been shown in Fig. 8 to Figure 12.

Cap among Fig. 8 to Figure 12 have with Fig. 1 to the same basic design of cap shown in Figure 4.Therefore, the Reference numeral of Fig. 1 to Fig. 4 is suitable equally in Fig. 8 to Figure 12.

To the cap of form shown in Figure 12, form pouring protrusion 110 at Fig. 8, replace toppling over cylinder 11 with arcuate shape.That is, the shorter part of articulated section 7 sides by will toppling over cylinder 11 is excised the pouring protrusion 110 that forms arc.In other words, because carrying liquid toppled over from a side opposite with articulated section 7, thereby do not need guiding wall in this part.Therefore, by cutting away this part, pouring protrusion 110 can not constitute obstruction when closed loam cake 2.

As in toppling over cylinder 11, in the circumferential core of such pouring protrusion 110, form sharp mouth 20, go up at the inside face (inclined surface 20b) of sharp mouth 20 and form groove 30.And as from understanding Fig. 9, on the inside part of pouring protrusion 110, top board 5 so tilts, and promptly articulated section 7 side step-downs are short.

Bottom on the inside face of pouring protrusion 110 is flat in whole zone, and forms almost vertical sealing surfaces 17 (especially referring to Fig. 9).In the otch (being pouring protrusion 110 cut and non-existent zones) of articulated section 7 sides, form on the top board 5 towards the sagging surface of annular indentation 12.The tapered surface that extends to annular indentation is formed at this surperficial bottom, and almost vertical sealing surfaces 17a is formed at the top that links to each other with this tapered surface, and the surperficial 17a of sealing links to each other with sealing surfaces 17 in the bottom of pouring protrusion 110.In other words, when loam cake 2 closures, sealing surfaces 17,17a that seal ring 29 closed contacts of loam cake 2 form in pouring protrusion 110 and top board 5 guarantee the leak tightness after forming pouring opening by fracture indentation 12 thus.As from understanding Fig. 9, the part that is formed on the closed contact sealing surfaces 17a of the seal ring 29 on the loam cake 2 is elongated.

And,, on the inside face of the cylinder side wall 27 of the loam cake 2 of this cap and in part (forming inboard), go up and form pod 40 by the part of flange 25b with articulated section 7 opposition sides by attenuate referring to Fig. 8 and Fig. 9.By forming this pod 40, the sharp mouth 20 of pouring protrusion 110 does not contact the inside face of the cylinder side wall 27 of loam cake when loam cake 2 closures, and promptly loam cake 2 can be successfully closed.

In such plastic cap, on the outside face of pouring protrusion 110, form buffer protrusion 50, it is outwards outstanding on the part below the sharp mouth 20.Buffer protrusion 50 is positioned at than on the high part of the ring-type kick that engages with loam cake 2 21, and its radial outside end is slightly more outer than the radial outer end 20a of sharp mouth.And as shown in Figure 10 and Figure 11, the upper surface 50a horizontal-extending of buffer protrusion 50, the curved extension of its outer peripheral edges, the side surface 50b of buffer protrusion 50 is made into such curved surface, the length that is projection reduces down gradually, is easy to the shape of the demoulding when being formed in moulding.

In the present invention, by forming above-mentioned buffer protrusion 50, can prevent effectively that meeting sharp mouth 20 leading section 20a because of finger when opening loam cake causes sense of discomfort.

For example referring to Figure 13, it shows the state of cap when loam cake is opened that does not have buffer protrusion 50 in pouring protrusion 110.In other words, open closed loam cake 2 with finger P with uncovering above-mentioned flange 25b.In this case, finger P probably will arrive to the sharp mouth 20 of the taper that is formed on the pouring protrusion 110 with strength.In the case, can allow the people who opens loam cake 2 not feel well.

In contrast to this, referring to Figure 14, its expression is formed with the state of cap of the present invention when loam cake is opened of above-mentioned buffer protrusion 50.As from Figure 14, understanding, in the present invention, when opening loam cake 2 with finger P, finger contact buffer protrusion 50.For this reason, even finger P meets the leading section 20a of sharp mouth 20, the situation of colliding sharp mouth 20 is relaxed, thereby effectively avoids the sense of discomfort that produced by collision.

That understands as described above is such, and buffer protrusion 50 is arranged near the lower end of sharp mouth 20 leading section 20a, and the upper end 50a of buffer protrusion preferably is projected into axis L part or the part (as shown in figure 10) more outer slightly than axis L through sharp mouth 20 front ends.Do like this is because if extrusion position is positioned at the position more inner than axis L, then do not give full play to the effect that alleviates the sharp mouth 20 of finger collision.

Like this, by above-mentioned buffer protrusion 50 is set, contiguous but do not contact under the outstanding occasion of the degree of inner peripheral surface of cylinder side wall 27 lower ends when opening loam cake 2 at the leading section 20a of sharp mouth 20, also can effectively alleviate loam cake 2 degree that finger P collides sharp mouth 20 when closed.

In addition, when liquid in container was transferred to small container easily, cap of the present invention also was favourable.

Figure 15 is illustrated in the state when liquid in container is transferred to small container of the plastic cap of the Figure 13 that does not form buffer protrusion.As from understanding this figure, in the upper end of the oral area 100 of the small container that will move liquid while the contact of the outside face of the pouring protrusion 110 that makes cap and during tilt container, sharp mouth 20 leading sections of pouring protrusion 110 upper ends are so located, promptly with the last end in contact of the mouth wall 100 of small container or do not contact mouthful wall 100 of small container, under this state, carry out toppling over of carrying liquid.Thereby in the case, under the situation of upper end face of the mouth wall 100 of contact small container, poured-out carrying liquid flows into, and the result causes that easily partially liq flows to and splash the such inconvenience of outside face side of container finish 100.

To this, as shown in figure 16, have in the cap of the present invention of buffer protrusion 50 in use, if contact the container that the buffer protrusion 50 that is formed on pouring protrusion 110 outside faces tilts to fill liquid while the mouth wall 100 that makes small container, then sharp mouth 20 positions of pouring protrusion 110 are slightly above small container mouth wall 100, as a result, liquid can directly be poured into small container, and not with the upper end closed contact of small container mouth wall 100.In other words, by while making buffer protrusion 50 and small container mouth wall 100 closed contact tilt containers, container displacement in the time of avoiding toppling over, and because can contact liq not with the situation of the wall of container 100 of the small container that is introduced under pouring liquid, so carrying liquid can reliably be poured in the small container with not splashing.

Get back to Fig. 9 to Figure 12, especially as shown in figure 12, the annular indentation 12 that forms in cap body 1 top board 5 has shape like this, and promptly 7 sides and be narrow with the part of articulated section 7 opposite sides in the articulated section form narrow 12a and 12b respectively.Promptly, torn forming pouring opening and on one side container lean to be poured out under the situation of carrying liquid from pouring opening on one side at annular indentation 12, carrying liquid accumulates on the inside face of sharp mouth 20 of pouring protrusion 110 and flows out fast from the narrow 12b that is formed on a side opposite with articulated section 7.In addition, after toppling over end, the liquid that adheres on the wall that remains in articulated section 7 sides is got back in the container rapidly from narrow 12a.This is because the surface that is formed with annular indentation 12 is to be formed with a side height of sharp mouth 20 and articulated section 7 side lowland bevelleds.

And as shown in figure 12, in the inner face of top board 5, be formed with the riblet 60,60 that extends on the each several part that is being formed with this narrow 12a, 12b downwards.Rib 60 becomes guiding, and the liquid that adheres on the wall that remains in articulated section 7 sides can't be trapped near the wall of narrow 12a, but gets back in the container effectively.

In addition, although illustrate about the cap of Fig. 1 to Fig. 4, as Fig. 1 to Fig. 4 and Fig. 8 to cap shown in Figure 12, lateral margin 6 is configured to be divided into by slit S the double-walled construction of inwall 6a and outer wall 6b, inwall 6a and outer wall 6b link together in the lower end.Be the lateral margin 6 of double-walled construction by formation, can when abandoning cap separately, from container finish, easily take off cap.When adopting above-mentioned double-walled construction, for example as shown in figure 10, be provided preferably with indentation 65 on the outer wall 6b.

Above-mentioned indentation 65 is formed near the articulated section 7 (hinged band 7b) on the position in outer wall 6b and extends ground vertically and constitutes.In other words, by pulling down the loam cake 2 under the open mode, indentation 65 is torn and outer wall 6b is broken, and can easily take off cap body 1 from container thus.

Tearing by such indentation 65 under the situation of outer wall 6b, as shown in figure 10, the top and bottom that are preferably in indentation 65 form otch 67 respectively.The formation of otch 67 is easy to realize tearing by indentation 65.And, utilize the outer wall 6b of indentation 65 to tear by pulling down opened loam cake 2 usually.Yet ordinary consumer can be removed cap body 1 by upwards pulling loam cake 2 from container.But, by also forming otch 67 in indentation 65 lower ends, indentation 65 can also be torn upwards pulling on to cover in 2 o'clock, and cap body 1 can be taken down from container.

And in the example of Figure 10, axially extended rib 70 is formed on the outside face of outer wall 6b, near the neighbouring part (articulated section 7) of indentation 65.Setting element when rib 70 is used as cap body 1 mount to container finish.

In addition, when lateral margin 6 is configured to the double-walled form by slit S as described above, the bottom of inwall 6a and outer wall 6b preferably links to each other by the bridging part that can rupture, and so, need not any speciality tool just can be easily cap body 1 be removed from container finish.

In addition, when inwall 6a is connected by the bridging part that can rupture with outer wall 6b,, can strengthen abandoning property separately by regulating Joint strenght.Figure 17 shows the example of such cap.

Figure 17 is the upward view of the plastic cap of expression loam cake 2 when opening.In this cap, link together by weakenings (indentation and a plurality of bridging part 75) by the inwall 6a of slit S division and the bottom of outer wall 6b.Bridging part 75 can easily be torn.

And in Figure 17, the bottom of inwall 6a and outer wall 6b is divided into tears initiation region Q1, tears and carry out regional Q2 and not peelable regional Q3.In other words, tearing initiation region Q1, the Joint strenght minimum of inwall 6a and outer wall 6b for example is set to the intensity of carrying out regional Q2 less than for example tearing.At not peelable regional Q3, Joint strenght is configured to the highest, is difficult to it is torn.

As from Figure 17, understanding, tear the lower end of the axial indentation 65 of initiation region from the end outside that is positioned at outer wall 6b articulated section 7, along circumferentially towards the articulated section 7 other end place sides extend.Tear and carry out regional Q2 and tear initiation region Q1 and link to each other, not peelable regional Q3 with tear carry out that regional Q2 links to each other and further with tear initiation region Q1 and link to each other.

Joint strenght among the above-mentioned zone Q1-Q3 can come simple realization by regulating the slit S degree of depth.

For example tearing initiation region Q1, slit S is connected to ground, lower end fully from the upper end of lateral margin 6.At this zone Q1, inwall 6a separates with outer wall 6b fully.Therefore, this zone is the minimum zone of Joint strenght.In the case, Joint strenght is 0, does not form weakenings.In addition, distinct slit S can link to each other with the bridging part 75 with minimum Joint strenght.

In contrast to this, carry out regional Q2 tearing, by being set in the scope of peelable degree with rupturable bridging part 75 greater than the bridging part of tearing among the Q1 of initiation region 75, perhaps by being higher than the intensity of tearing initiation region Q1 with shortening at interval less than interval between the bridging part of tearing among the Q1 of initiation region between the bridging part 75, Joint strenght can being increased to.And, carrying out regional Q2 tearing, Joint strenght can be adjusted by the indentation that forms dark slit S, need not to be provided with to break the bridging part 75 that splits.

In addition, at not peelable regional Q3, can obtain the Joint strenght that to tear by forming the most shallow slit S or not forming slit S.

As mentioned above, form the regional Q1-Q3 that has regulated Joint strenght, can further strengthen abandoning property separately by bottom at inwall 6a and outer wall 6b.For example, the state that removes the cap that is formed with above-mentioned zone from container finish has been shown in Figure 18 and Figure 19.

In the example of Figure 18 and Figure 19, do not form rupturable bridging part being equivalent to tear on the part of initiation region Q1, only, form rupturable bridging part 75 according to certain interval being equivalent to tear on the part of the Q2 of the portion of carrying out.

Promptly as from understanding Figure 18 and Figure 19, after indentation 65 is torn on pulling loam cake 2 ground downwards, circumferentially peel off outer wall 6b by catching loam cake 2 and edge, bridging part 75 is torn, outer wall 6b separates with inwall 6a fully, and outer wall 6b only keeps being connected at the regional Q3 that does not allow to tear with inwall 6a.As a result, engaging force reduces significantly between cap body 1 and container finish, and by catching the outer wall 6b that tears with hand and upwards drawing cap body 1, can easily remove cap body 1 from container finish.

When tearing as described above, the part that being provided with of outer wall 6b is used to connect the articulated section 7 of loam cake 2 becomes the starting point of tearing initiation region Q1 of bridging part 75, and the Joint strenght between inwall 6a and the outer wall 6b minimum (being 0 in the case), therefore, can begin fast to tear and be transferred to subsequently tearing and carry out tearing among the regional Q2, just cap body 1 can be removed from container finish without any need for instrument.

In addition, in the case, except the upper end at axial indentation 65 is provided with otch 67, also otch 67 is set in its lower end, thereby when attempt upwards to pull on cover 2 ground with cap body 1 when container finish removes, can be by removing cap body 1 from container finish at the otch 67 of axial indentation 65 lower ends and the effect of tearing initiation region Q1.

In addition, preferably so set the length of above-mentioned each regional Q1-Q3, under the situation of engaging force between harmless cap body 1 and the container finish, keep stable leak tightness, tearing of rupturable bridging part 75 can be carried out smoothly, and can easily remove cap body 1 from container finish.For example, unnecessarily increase if tear the intensity of initiation region Q1, then the engaging force between the oral area of cap body 1 and container reduces, and leak tightness is impaired.Therefore, this length is set to the circumferential lengths of hinged no better than band portion 7 usually.In addition, can so set and tear the length of carrying out regional Q2, when this regional bridging part 75 is torn, can be easily cap body 1 be removed from container finish.For example, be enough to reach half that is not less than lateral margin 6 circumferential total lengths if tear initiation region Q1 and tear the total length that carries out regional Q2.And, not necessarily not peelable regional Q3 must be set.

As from understanding above describing, the cap that inwall 6a and outer wall 6b link together by rupturable bridging part 75 has good abandoning property separately.

Above-mentioned cap of the present invention can be effective as the cap (lid) of the container that is filled with various beverages and flavoring such as soy sauce etc.

Claims (13)

1. plastic cap, comprise cap body that is fixed to container finish and the loam cake that can open and close to be installed to this cap body, the lateral margin that described cap body has top board and extends downwards from all genesis of this top board, on described top board, be formed with and be used to topple over opening or the prodefined opening zone that liquid in container, on the upper surface of this top board, the ring-type kick that on the Outboard Sections in this opening or this prodefined opening zone, is formed with pouring protrusion and is used for engaging with this loam cake, this pouring protrusion becomes the outside that the guiding piece of toppling over liquid in container and this ring-type kick are positioned at this pouring protrusion, it is characterized in that, form sharp mouth in the upper end of described pouring protrusion, this point mouth is outward-dipping outstanding and see triangular in shape from upper surface, the bottom of the inside face of described pouring protrusion forms the sealing surfaces that in the vertical direction extends, on the inside face of described pouring protrusion, be formed with the groove that extends to the upper end on sealing surface from the upper end of this point mouth, at the seal ring that is formed with on the inside face of this loam cake when this loam cake is closed with the surperficial closed contact of sealing.

2. plastic cap according to claim 1 is characterized in that described pouring protrusion has cylindrical shape.

3. plastic cap according to claim 1, it is characterized in that, the inside face of the described sharp mouth of described pouring protrusion forms the outward-dipping inclined surface that makes progress from the upper end on sealing surface, on the side section at the circumferential center of this point mouth, see that described inclined surface is configured on half height at least of described pouring protrusion.

4. plastic cap according to claim 1 is characterized in that, described opening or prodefined opening zone are configured to the shape that the part that is positioned at this point mouth opposite side has the pouring liquid throttling range of little width.

5. plastic cap according to claim 1, it is characterized in that, from the top, described groove comprise the big liquid measure that extends to the upper end of described sharp mouth from described sealing surfaces topple over guiding with slot part, this big liquid measure topple over guiding with within the slot part, topple over than big liquid measure guiding little but dark with the width of slot part and extend to low consumption of the liquid on the sharp mouth or medium liquid measure from the upper end on sealing surface and topple over to guide and use slot part.

6. plastic cap according to claim 5, it is characterized in that, topple over guiding with the inboard of slot part in this big liquid measure, be formed with than this big liquid measure topple over guiding with the width of slot part little but dark and from the medium liquid measure that the upper end on sealing surface extends to sharp mouth upper end topple over guiding with slot part and than this medium liquid measure topple over guide with the width of slot part little but dark and extend to low consumption of the liquid on the sharp mouth from the upper end on sealing surface and topple over to guide and use slot part.

7. plastic cap according to claim 4, it is characterized in that, on the inside part of the pouring protrusion of described top board, be formed with the recess that caves in most in the middle part, described opening or prodefined opening zone are formed at described recess, form the stream of toppling over of taper convergent towards the root ground of described pouring protrusion from the pouring liquid throttling range in described opening or prodefined opening zone, topple on the extended line of stream in this middle part of described groove.

8. plastic cap according to claim 1 is characterized in that, is formed with buffer protrusion on the outside face of described pouring protrusion, and this buffer protrusion is positioned at the below of this point mouth and outwards gives prominence on engaging with the high part of annular kick than this loam cake.

9. plastic cap according to claim 8 is characterized in that, described buffer protrusion be positioned at described sharp mouth lower end near, and the radial outside end of described buffer protrusion is positioned on the position identical with the radial outside end of sharp mouth or outer slightly.

10. plastic cap according to claim 1 is characterized in that described loam cake is hinged on the upper end of described lateral margin, and this point mouth is formed on the opposite side part of the part that is hinged with this loam cake and this lateral margin.

11. plastic cap according to claim 10 is characterized in that, the radial outside end of this point mouth is with contiguous when loam cake is closed but not contact the degree of inner peripheral surface of lower end of this loam cake outstanding.

12. plastic cap according to claim 10, it is characterized in that, at least a portion of described lateral margin, form the double-walled construction that comprises inner and outer wall, this inwall and this outer wall interconnect by lacerable weakenings in its lower end, and described articulated section is formed on the described outer wall.

13. plastic cap according to claim 11, it is characterized in that, on the outside of this articulated section one side's side of this lateral wall, form axially extended and lacerable axial indentation, and be formed with on the part of this axial indentation, on the top and bottom of this outer wall, all be formed with otch, on the bottom of this inwall and this outer wall, be formed with lower end with this axial indentation and be starting point and upwards tear the initiation region and tear tearing that the initiation region links to each other and carry out the zone, and be set to than to tear the Joint strenght that carries out in the zone low relatively described with the Joint strenght of outer wall at the described inwall of tearing in the initiation region with described towards what another side place one side of this articulated section was extended in week.

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