CN2372253Y

CN2372253Y - Theft-proof bottle cap

Info

Publication number: CN2372253Y
Application number: CN 98251963
Authority: CN
Inventors: 董朝霞
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-27
Filing date: 1998-12-27
Publication date: 2000-04-05
Anticipated expiration: 2008-12-27

Abstract

The utility model discloses a theft proof bottle cap, which belongs to the technical field of the packaging bottle. The utility model is provided with cap body 1, a tamper ring 3, and a connecting bridge with a spacing structure 8, wherein, the lower end surface of the cap body 1 is provided with a similar saw tooth-shaped structure 4, and the upper end surface of the tamper ring 3 is provided with a similar saw tooth-shaped structure 4. One edge of each similar saw tooth-shaped structure 4 forms a force bearing point 5 which is used for bearing the resistance force between the tamper ring and the bottle jack when the bottle cap is screwed in, and the connecting bridge 8 is provided with a stress concentration point 6; hence, the utility model has the characteristics that when the bottle cap is screwed in, the connecting bridge 8 can not be broken, when the bottle cap is screwed out, the connecting bridge 8 can be broken easily, and theft proof capacity is strengthened; the utility model can especially improve theft proof performance of the hot filling product.

Description

Anti-theft bottle cap

The utility model relates to a kind of anti-theft bottle cap, and particularly a kind of lid lower surface has the class zigzag structure or is interrupted the anti-theft bottle cap of ramp structure, belongs to the Packaging Bottle technical field.

The lid lower surface of the anti-theft bottle cap of prior art is a planar structure, between lid and the anti-theft ring connecting bridge is set, connecting bridge is shape linearly, connecting bridge becomes to be arranged vertically with the anti-theft ring upper surface with the lid lower surface, connecting bridge also is vertical with the cross section of the interconnective point of lid and anti-theft ring with connecting bridge, be provided with the spacing ring of projection in the anti-theft ring, for example ' antiseepage anticracking anti-theft plastic bottle lid ' patent No. by name of announcing of Chinese patent bulletin is that ' 97209091.6 ' utility model patent all has These characteristics for ' 94231225.2 ' utility model patent and ' plastic seal anti-theft bottle cap ' patent No. by name, also there is following shortcoming in this part prior art: 1. bottle cap lid when screwing in bears directly greatly with anti-theft ring bonded assembly connecting bridge that shearing force ruptures easily, and make and require height, especially material and technology are all had specific (special) requirements; 2. because the resistance between anti-theft ring and bottleneck will lean on lid and anti-theft ring bonded assembly connecting bridge to bear to screw in the time, so the design of connecting bridge is general relative all bigger, and the unlatching torsion of bottle cap when back-out is also bigger like this; 3. be provided with the lid lower surface is vertical with anti-theft ring bonded assembly connecting bridge owing to lid, and the cross section of connecting bridge and the interconnective point of lid and anti-theft ring also is vertical with connecting bridge, therefore could be in the time of when outwarding winding, must certain displacement being arranged axially with connecting bridge tension failure, and at this moment bottle cap has turned over certain angle already, tend to like this occur that bottle leaks gas and lid and anti-theft ring bonded assembly connecting bridge can't rupture, theftproof performance is reduced greatly.

The purpose of this utility model is in order to overcome the above-mentioned shortcoming of prior art, the anti-theft bottle cap of the extremely strong energy widespread use of a kind of anti-theft capability to be provided.

For achieving the above object, anti-theft bottle cap of the present utility model is by lid, anti-theft ring and connecting bridge are formed, hermetically-sealed construction and screw thread are arranged in the lid, position limiting structure is arranged in the anti-theft ring, the separated interface of lid and anti-theft ring is the class zigzag structure that the upper surface of lid lower surface and anti-theft ring has serration or developed and by serration, the ramp structure that perhaps has interruption, the connecting bridge of lid and anti-theft ring constitutes stress point in one of them limit of class zigzag structure or the ramp structure of interruption, resistance when bearing bottle cap and screwing between anti-theft ring and the bottleneck, connecting bridge easy fracture not when making the can spiral cover.

Connecting bridge of the present utility model is shape linearly, and the root of linear connecting bridge is provided with focal point of stress; The tangential angle that becomes less than 45 ° of the hand of rotation the when direction of linear connecting bridge is rotated with bottle cap; Perhaps the direction of linear connecting bridge can also be the angle that becomes with the axis direction of lid less than 45 °, and connecting bridge and the cross section of the point of connection of lid and anti-theft ring are what to become less than 45 ° angle between the axis with connecting bridge.

Connecting bridge of the present utility model can also be broken line shape or the curvilinear figure that is made of two sections straight lines at least, and certain of broken line shape or curvilinear figure connecting bridge a bit is a focal point of stress, and connecting bridge begins fracture from focal point of stress when bottle cap is outwarded winding.

Position limiting structure in the anti-theft ring of the present utility model can be that the inward direction that makes progress of the lower edge from anti-theft ring extends the pawl that forms, each pawl is made up of the plane polygon on plural three limits at least, link together at place, polygonal limit mutually between the pawl, constitute a circle pawl, the complete pawl of one circle is similar to a sheet fold and forms, it can match with the pit that specially is provided with on the bottleneck, make anti-theft ring can only be when bottle cap screws in and lid rotate simultaneously, and anti-theft ring can not be rotated simultaneously maybe with lid and can only be rotated very little angle when lid is screwed out.

Compared with prior art, the utlity model has following advantage:

1. has zigzag structure owing to lid and the separated lid of anti-theft ring lower surface or by zigzag structure the class zigzag structure of coming that develops, the ramp structure that perhaps has interruption, the connecting bridge of lid and anti-theft ring constitutes stress point in one of them limit of class zigzag structure or the ramp structure of interruption, bottle cap resistance between anti-theft ring and the bottleneck in the screw-in process mainly bears by stress point, connecting bridge itself is compression chord or be subjected to very little moment of flexure then, therefore the possibility of connecting bridge fracture significantly reduces in can spiral cover process, and the fraction defect of can spiral cover production link is reduced greatly;

2. because there is focal point of stress in connecting bridge, connecting bridge bears and shears and moment of flexure when opening bottle cap, is very easy to fracture, and it is very little to open torsion, and theftproof performance is stronger;

Since on pawl and the bottleneck in the anti-theft ring specially the pit of setting match, cause anti-theft ring can only be when screwing in and lid rotate simultaneously, and anti-theft ring can not be rotated with lid simultaneously by pawl is stuck when lid is screwed out, like this in the process of opening bottle cap, must be that connecting bridge disconnects earlier, just gas leakage of bottle then, theftproof performance has just been strengthened greatly like this;

Since antitheft plastic cap of bottle lid when screwing in be not easy to rupture with anti-theft ring bonded assembly connecting bridge, therefore greatly reduce the design and fabrication technology difficulty of anti-theft bottle cap, especially the requirement to material and technology all greatly reduces, and makes to make to be more prone to simple.

Below in conjunction with accompanying drawing the utility model is described:

Accompanying drawing is a specific embodiment of the utility model anti-theft bottle cap, and Fig. 1 expresses the keystone configuration of anti-theft bottle cap, and Fig. 2 is that view is dug in anti-theft ring A-A cross section, and Fig. 3 is a B portion enlarged drawing.

By accompanying drawing as can be known, present embodiment is by lid (1), anti-theft ring (3) and connecting bridge (8) are formed, hermetically-sealed construction (10) and screw thread (9) are arranged in the lid, anti-theft ring (3) is that anti-theft ring upper surface and lid lower surface (2) have the class zigzag structure (4) that is developed and by serration with the separated interface of lid (1), the minor face of the sawtooth of class zigzag structure (4) constitutes stress point (5), resistance when bearing the bottle cap screw-in between anti-theft ring (3) and the bottleneck, the L-shaped polyline shaped of connecting bridge (8), the interior corner of connecting bridge (8) is provided with focal point of stress (6), connecting bridge when bottle cap is outwarded winding (8) begins fracture from focal point of stress (6), there is the inward direction that makes progress from the lower edge of anti-theft ring (3) to extend the pawl (7) that forms in the anti-theft ring (3), each pawl is made up of two plane triangles, link together at the place, limit of plane triangle mutually between the pawl and constitute the complete pawl (7) of a circle, complete pawl (7) is similar to a sheet fold and forms, it can match with the pit that specially is provided with on the bottleneck, make anti-theft ring (3) can only be when bottle cap screws in and lid (1) rotate simultaneously, and anti-theft ring (3) can not be rotated simultaneously with lid (1) and maybe can only be rotated very little angle when bottle cap is screwed out.

When bottle cap screws in bottleneck, because making connecting bridge not stress substantially, the effect of stress point therefore can screw in smoothly, the phenomenon of connecting bridge fracture in can spiral cover process, can not occur, so fraction defect is low; Because pawl along screw-in direction, therefore can not increase resistance when bottle cap screws in, and connecting bridge directly bears moment of flexure when bottle cap screws out, and the interior angle of connecting bridge is a wedge angle, have stress concentration, connecting bridge just is very easy to fracture like this, makes to open to be very easy to; Because the effect of pawl can not be rotated anti-theft ring to the direction of outwarding winding, and connecting bridge is very easy to fracture when outwarding winding, and therefore must be that connecting bridge ruptures earlier in addition, just gas leakage of bottle then is so antitheft effect is strengthened greatly simultaneously.

Claims

1. anti-theft bottle cap, by lid (1), anti-theft ring (3) and connecting bridge (8) are formed, hermetically-sealed construction (10) and screw thread (9) are arranged in the lid, anti-theft ring has position limiting structure in (3), it is characterized in that: lid (1) is the class zigzag structure (4) that lid lower surface (2) and anti-theft ring upper surface have serration or developed and by serration with the separated interface of anti-theft ring (3), perhaps lid lower surface (2) and anti-theft ring upper surface ramp structure with interruption, lid (1) constitutes stress point (5) with the connecting bridge of anti-theft ring (3) in one of them limit of class zigzag structure (4) or the ramp structure of interruption, the resistance when bearing the bottle cap screw-in between anti-theft ring (3) and the bottleneck;

2. anti-theft bottle cap according to claim 1 is characterized in that: connecting bridge (8) is shape linearly, and root is provided with focal point of stress, the tangential angle that becomes less than 45 ° of the hand of rotation the when axis direction of connecting bridge (8) rotates with bottle cap;

3. anti-theft bottle cap according to claim 1, it is characterized in that: connecting bridge (8) is shape linearly, root is provided with focal point of stress, the axis direction of connecting bridge (8) becomes the angle less than 45 ° with the axis direction of lid (1), and connecting bridge (8) and the cross section of lid (1) and anti-theft ring (3) point of connection are what to become less than 45 ° angle between the axis with connecting bridge (8);

4. anti-theft bottle cap according to claim 1, it is characterized in that: connecting bridge (8) is broken line shape or the curved shape that has two sections rectilinear(-al)s at least, certain of connecting bridge (8) is provided with focal point of stress (6), and connecting bridge when bottle cap is outwarded winding (8) begins fracture from focal point of stress (6);

5. according to claim 1 or claim 2 or 3 or 4 described anti-theft bottle caps, it is characterized in that: the position limiting structure in the anti-theft ring (3) is that the inward direction that makes progress of the lower edge from anti-theft ring (3) extends a circle pawl (7) that forms, each pawl by plural more than or the plane polygon that equals three limits form, interconnect at place, the limit of plane polygon between the pawl and constitute a circle pawl (7), the pawl (7) of whole circle is similar to a sheet fold and forms, it can match with the pit that specially is provided with on the bottleneck, cause anti-theft ring (3) can only be when bottle cap be threaded into and lid (1) rotate simultaneously, and anti-theft ring (3) can not be rotated simultaneously with lid (1) and maybe can only be rotated very little angle when bottle cap is screwed out.