CN2275072Y

CN2275072Y - Radial seal pad and wedge elastic buckel anti-theft plastic bottle cap

Info

Publication number: CN2275072Y
Application number: CN 96237734
Authority: CN
Inventors: 张辉和
Original assignee: HUANA PACKING PRODUCT CO Ltd SANSHUI CITY
Current assignee: HUANA PACKING PRODUCT CO Ltd SANSHUI CITY
Priority date: 1996-11-12
Filing date: 1996-11-12
Publication date: 1998-02-25
Anticipated expiration: 2006-11-12

Abstract

The utility model relates to an anti-theft bottle cap, particularly a radial seal pad and wedge elastic lock catch anti-theft plastic bottle cap, which is composed of an upper basal body 1, a lower basal body 2, and a cross structure 3, wherein the top basal body 1 and the lower basal body 2 are connected through the cross structure 3; the upper basal body 1 is also provided with threads 4 and an annular seal pad 5. The utility model is characterized in that the annular seal pad 5 is positioned on the junction of the top of the upper basal body 1 and the inside wall and extends out along a conical surface which forms a certain included angle with the inside wall so as to form a truncated cone. The cross section radius of the truncated cone is equal to the external diameter of a vessel opening to be capped. The inner wall of the lower basal body 2 is also provided with symmetrically distributed T-shaped wedge surface lock catches 6, the upper part of each T-shaped wedge surface lock catch 6 extends out in a radial direction from the inner wall of the lower basal body 2, and the lower part of each T-shaped wedge surface lock catch 6 abuts against the inner wall of the lower basal body 2. The wedge surface of each T-shaped wedge surface lock catch 6 forms an included angle alpha with a vertical axis, and an elastic cambered surface 7 separates different wedge surfaces of the T-shaped wedge surface lock catches 6. The utility model has the advantages of no tearing, no burst, good tightness and anti-theft performance, low cost and wide ranges of application.

Description

A kind of radial seal pad and wedge surface elastic lock anti-theft plastic bottle lid

The utility model relates to a kind of anti-theft bottle cap, and particularly a kind of radial seal pad and wedge surface elastic lock anti-theft plastic bottle lid belong to field of packaging material.

The plastic bottle closure of prior art is provided with seal ring and anti-theft ring mostly, but the leak tightness of these plastic bottle closures and anti-theft are all undesirable, and complex manufacturing, the cost height.For example the number of patent application of Chinese patent bulletin is " 93243352.9 ", name is called the utility model patent of " a kind of prevent open without authorization plastic seal bottle cap ", form by lid matrix, lid pin and dowel, the inside of lid matrix is provided with seal ring, the inwall of lid pin is provided with anti-theft ring, has certain leak tightness and theftproof performance.But there is following shortcoming in this technology: 1. seal ring is an axially downwardly extending, and its root is torn easily, and there is the dangerous section of the yielding explosion of a stress concentration in caping during use.2. anti-theft ring is rigidity, needs very big axial positive pressure during the envelope bottle, and can not reliably exert pressure effectively to the bottle of bottleneck boss shape puts in place.3. mould and injection moulding section bar are required height, complex manufacturing, thereby cost is higher.

The purpose of this utility model provides a kind of radial seal pad and wedge surface elastic lock anti-theft plastic bottle lid, and this anti-theft plastic bottle lid can overcome the shortcoming of prior art, indeformable, not explosion, is easy to revolve envelope.

The purpose of this utility model can take following measure to reach: a kind of radial seal pad and wedge surface elastic lock anti-theft plastic bottle lid, be formed by connecting by connecting bridge by last matrix, lower substrate, last matrix also is provided with screw thread and sealing ring pad, its constructional feature is: sealing ring pad is positioned at the top of matrix and the junction of madial wall, and stretch out with the circular conical surface that this madial wall forms an angle on the edge, form a conical butt, this Frusto-conical section radius is equivalent to adorn the external diameter of the vessel port of lid; The inwall of lower substrate also is provided with at least four symmetrical distributions " T " type wedge surface snap close, top that should " T " type wedge surface snap close from the madial wall of lower substrate extend radially out, the bottom is near the madial wall of lower substrate, its wedge surface and vertical axes are cut with forming angle α, and each " T " type wedge surface snap close is separated by the elasticity cambered surface.

Constructional feature of the present utility model also has: the angle of the root of sealing ring pad and the madial wall of last matrix is 45 °～80 °.

The junction of the root of sealing ring pad and the top of last matrix, madial wall is cambered surface, and wherein the circular arc radian with the outside of the radian of the cambered surface of madial wall institute shape and bottleneck coincide.

The madial wall of lower substrate is established the wedge surface snap close of four groups of symmetries, and wherein every group of wedge surface snap close comprises two " T " type wedge surface snap closes, respectively is provided with an elasticity cambered surface between " T " type wedge surface snap close; Each is organized between the wedge surface snap close and is separated by an elasticity cambered surface, and aforementioned elasticity cambered surface is positioned on the circumference of same diameter, and the angle α in the wedge surface of wedge surface snap close and vertical axes cross section is 5 °～30 °.

The lateral wall of lower substrate respectively is provided with a breach corresponding to the adjacent of the point of connection of elasticity cambered surface and " T " type wedge surface snap close.

Compared with prior art, the utility model has following outstanding advantage:

1. seal ring increases with the area that is connected of last matrix, can not tear, and can quick-friedly not cover good airproof performance.

2. the anti-theft ring of forming by symmetrical wedge surface snap close, capping is easy, and theftproof performance is good.

3. production technology is simple, and is with low cost, applied widely.

Below in conjunction with accompanying drawing the utility model being carried out detail describes:

Fig. 1 is a part cut-away view of the present utility model.

Fig. 2 is the partial cutaway diagrammatic sketch of seal ring of the present utility model and last matrix junction.

Fig. 3 is a running condition partial cutaway diagrammatic sketch of the present utility model.

Fig. 4 is the C-C cross section cut-away view of the utility model embodiment 1.

Fig. 1 to Fig. 4 constitutes embodiment 1 of the present utility model.From Fig. 1, Fig. 3 as can be known, present embodiment is formed by connecting by connecting bridge 3 by last matrix 1, lower substrate 2, last matrix 1 also is provided with screw thread 4 and sealing ring pad 5, wherein sealing ring pad 5 is positioned at the top of matrix 1 and the junction of madial wall, and stretch out along the circular conical surface that forms an angle with this madial wall, form the external diameter that this Frusto-conical section radius of a conical butt is equivalent to adorn the vessel port of lid; The inwall of lower substrate 2 also is provided with symmetrical distribution " T " type wedge surface snap close 6, top that should " T " type wedge surface snap close 6 from the madial wall of lower substrate 2 extend radially out, the bottom is near the madial wall of lower substrate 2, the angle α that its wedge surface and vertical axes cross section form is 10 °, each " T " type wedge surface snap close 6 is separated by elasticity cambered surface 7, the angle of the madial wall of the root of sealing ring pad 5 and last matrix 1 is 45 °: the top of the root of sealing ring pad 5 and last matrix 1, the junction of madial wall are cambered surface, and wherein the circular arc radian with the outside of the radian of the cambered surface of madial wall institute shape and bottleneck coincide; As can be seen from Figure 4, present embodiment is established the wedge surface snap close of four groups of symmetries at the madial wall of lower substrate 2, and wherein two " T " types of every group of wedge surface snap close bag wedge surface snap close 6, is provided with an elasticity cambered surface 8 between each " T " type wedge surface snap close; Each is organized between the wedge surface snap close and is separated by an elasticity cambered surface 7, elasticity cambered surface 7, elasticity cambered surface 8 are positioned on the circumference of same diameter, the lateral wall of lower substrate 2 respectively is provided with a breach 9 corresponding to the adjacent of the point of connection of elasticity cambered surface 7 and " T " type wedge surface snap close 6, and this breach 9 is 60 ° with the angle of the tangent line of neutral line.

As can be seen from Figure 3, the radian in the radian of the root cambered surface of seal ring of the present utility model and the bottleneck outside coincide, it extends radially out angle ∠ BOB and bends to ∠ B ' OB ', the folding bend angle ∠ A ' OA ' that axially stretches out of contrast prior art, ∠ B ' OB ' is much smaller, in addition, from the N-N section, the dangerous section value of axially stretching out in the prior art is a, dangerous section value of the present utility model is the a+ Δ, same more much bigger than existing, so seal ring of the present utility model easy fracture not, caping is difficult for explosion; The radian tight connecting of the radian in the bottleneck outside and the root cambered surface of seal ring, favorable sealing property.From Fig. 3, Fig. 4 as can be known, anti-theft ring of the present utility model is made up of " T " type wedge surface snap close of four groups of symmetries; Because each " T " type wedge surface snap close is separated by an elasticity cambered surface, therefore lower substrate 2 has better elastic, and when the utility model screwed in bottleneck, the minimum diameter Ф min of lower substrate was by asymptotic expansion, the snap close anchor ring is arrived by flange smoothly sting the position mutually, because there is uniform

elastic buffer district

7,8 in lower substrate 2, neutral line forms 60 ° of round corner cuts, so during bottle cap screw-in bottleneck flange, lower substrate 2 elastic dilatations, behind flange, the lower substrate recovery of elasticity, anti-theft effect is good.In addition, according to mathematical principle, there is a weighted average diameter Ф in lower substrate 2, and Ф is more much bigger than Ф min for this weighted average diameter, because in fact Ф can be considered the working diameter of lower substrate 2, so axial positive pressure significantly descends during the spinning lid.

Other embodiment of the present utility model is the size that changes wedge surface with the angle α in vertical axes cross section of wedge surface snap close 6, perhaps changes the size of angle of the madial wall of sealing ring pad 5 and last matrix 1.

Claims

1. radial seal pad and wedge surface elastic lock anti-theft plastic bottle lid, be formed by connecting by connecting bridge (3) by last matrix (1), lower substrate (2), last matrix (1) also is provided with screw thread (4) and sealing ring pad (5), it is characterized in that: sealing ring pad (5) is positioned at the top of matrix (1) and the junction of madial wall, and stretch out with the circular conical surface that this madial wall forms an angle on the edge, form a conical butt, this Frusto-conical section radius is equivalent to adorn the external diameter of the vessel port of lid; The inwall of lower substrate (2) also is provided with " T " type wedge surface snap close (6) of at least four symmetrical distributions, top that should " T " type wedge surface snap close (6) from the madial wall of lower substrate (2) extend radially out, the bottom is near the madial wall of lower substrate (2), its wedge surface and vertical axes form angle α, and each " T " type wedge surface snap close (6) is separated by elasticity cambered surface (7).

2. a kind of radial seal pad according to claim 1 and wedge surface elastic lock anti-theft plastic bottle lid, it is characterized in that: the angle of the madial wall of the root of sealing ring pad (5) and last matrix (1) is 45 °～80 °.

3. a kind of radial seal pad according to claim 1 and 2 and wedge surface elastic lock anti-theft plastic bottle lid, the top of the root of sealing ring pad (5) and last matrix (1), the junction of madial wall are cambered surface, and wherein the circular arc radian with the outside of the radian of the cambered surface of madial wall institute shape and bottleneck coincide.

4. a kind of radial seal pad according to claim 1 and wedge surface elastic lock anti-theft plastic bottle lid, it is characterized in that: the madial wall of lower substrate (2) is established the wedge surface snap close of four groups of symmetries, wherein every group of wedge surface snap close bag two " T " types wedge surface snap close (6) is provided with an elasticity cambered surface (8) between each " T " type wedge surface snap close; Each is organized between the wedge surface snap close and is separated by an elasticity cambered surface (7), and elasticity cambered surface (7), elasticity cambered surface (8) are positioned on the circumference of same diameter, and the wedge surface of wedge surface snap close (6) and the angle α in vertical axes cross section are 5 °～30 °.

5. a kind of radial seal pad according to claim 4 and wedge surface elastic lock anti-theft plastic bottle lid, it is characterized in that: the lateral wall of lower substrate (2) respectively is provided with a breach (9) corresponding to the adjacent of the point of connection of elasticity cambered surface (7) and " T " type wedge surface snap close (6).