CN211092305U - Lipstick tube with improved air tightness - Google Patents

Abstract

The utility model relates to a lipstick tube for improving air tightness, which comprises a bottom shell and an upper cover which are mutually buckled, wherein the bottom shell and the upper cover are at least two-layer structures which are nested inside and outside, the innermost layer of the upper cover is an inner cover made of metal, and the innermost layer of the bottom shell is an inner bottom made of metal; one part of the inner bottom is a first extension section with the periphery exposed, and a sealing ring is sleeved on the periphery of the first extension section; under the lock state, the inner cup parcel the periphery of first extension section, and through the sealing washer with interior bottom seal fit forms the closed chamber that holds a red cream. The utility model provides an improve lipstick pipe of gas tightness, through the leakproofness of sealing washer in order to improve the lipstick pipe, inner bottom and inner cup all adopt the metal material simultaneously, and the partial micromolecule of having avoided the lipstick cream permeates the phenomenon outside the lipstick, has solved the weightlessness problem.

Description

Lipstick tube with improved air tightness

Technical Field

The utility model relates to a technical field of cosmetic packaging especially relates to an improve lipstick pipe of gas tightness.

Background

As the lipstick cream is gradually liquefied, the lipstick tube tends to develop airtightness. The existing lipstick tube has poor air tightness, so that the problem of weight loss of lipstick cream is caused. In addition, when the lipstick tube adopts a plastic piece, because partial micromolecules in the lipstick paste are smaller than the molecular gaps of the plastic piece, the micromolecules easily permeate the plastic piece and are discharged out of the lipstick tube through the plastic piece, and the weight loss of the lipstick paste is aggravated.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a lipstick tube with improved airtightness to address the problem of weight loss of lipstick body due to poor airtightness of the lipstick tube.

In order to achieve the above purpose, the utility model adopts the following technical proposal: a lipstick tube capable of improving air tightness comprises a bottom shell and an upper cover which are mutually buckled, wherein the bottom shell and the upper cover are of at least two-layer structures which are nested inside and outside, the innermost layer of the upper cover is an inner cover made of metal, and the innermost layer of the bottom shell is an inner bottom made of metal;

one part of the insole is a first extension section with the periphery exposed, and a sealing ring is sleeved on the periphery of the first extension section; under the lock state, the inner cup parcel the periphery of first extension section, and pass through the sealing washer with interior bottom seal fit forms the closed chamber that holds a red cream.

In one embodiment, the inner cap and the inner bottom are both cylindrical structures, the opposite sides of the inner cap and the inner bottom are closed, and the opposite sides of the inner cap and the inner bottom are open and are in sealed movable insertion connection.

In one embodiment, the outer periphery of the first extension section is provided with a mounting groove, and the sealing ring is arranged in the mounting groove.

In one embodiment, the upper cover comprises an outer cover, a middle cover and the inner cover which are sequentially fixed in a nested manner from outside to inside; the bottom shell comprises an outer bottom, a middle sleeve and the inner bottom which are sequentially nested and fixed from outside to inside;

one part of the middle sleeve is a second extension section extending out of the outsole, one part of the middle cover is a third extension section extending out of the inner cover, the third extension section surrounds the periphery of the second extension section in a buckling state, and the outer cover is aligned and abutted to the outsole.

In one embodiment, a middle bundling core is inserted into the inner bottom, a first step is arranged on the periphery of the inner bottom, and a second step which is abutted against the first step and used for positioning in the axial direction is arranged on the inner wall of the middle sleeve.

In one embodiment, a weight is arranged between the middle cover and the outer cover.

In one embodiment, the upper cover comprises an outer cover and an inner cover which are sequentially nested and fixed from outside to inside; the bottom shell comprises an outer bottom and an inner bottom which are sequentially nested and fixed from outside to inside;

the inner bottom is provided with a necking structure, the inner wall of the inner cover is provided with an inclined step matched with the necking structure, and the outer cover and the outer bottom are aligned and abutted in a buckling state.

In one embodiment, a weight is disposed in a radial gap between the outer cap and the inner cap, and a weight is disposed in a radial gap between the outer sole and the inner sole.

In one embodiment, a first magnetic member is disposed in a radial gap between the outer cover and the inner cover, a second magnetic member is disposed in a radial gap between the outer sole and the inner sole, and the second magnetic member are adjacent to each other and attracted in a fastened state.

In one embodiment, the opening portion of the inner cover is provided with a first outer flange which abuts against the inner wall of the outer cover to close the radial gap between the outer cover and the inner cover, and the first magnetic part surrounds the outer periphery of the inner cover and abuts against the first outer flange;

the opening part of the insole is provided with a second outer flange which is abutted against the inner wall of the outsole to close the radial gap between the outsole and the insole, and the second magnetic piece surrounds the periphery of the insole and is abutted against the second outer flange.

The utility model provides a pair of lipstick pipe of improvement gas tightness establishes the leakproofness of sealing washer in order to improve the lipstick pipe through the first extension section periphery cover at the inner bottom, and inner bottom and inner cup all adopt the metal material simultaneously, and when having avoided the lipstick pipe to adopt the working of plastics, the partial micromolecule of lipstick cream permeates the phenomenon outside the lipstick pipe, has solved the weightlessness problem of lipstick cream.

Other advantages of the present application will be further described in the detailed description.

Drawings

Fig. 1 is a schematic structural view of a lipstick tube with improved airtightness according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of the lipstick tube shown in FIG. 1 at A;

fig. 3 is a schematic structural view of a lipstick tube with improved airtightness according to another embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of the lipstick tube shown in FIG. 3 at B;

figure 5 is a schematic illustration of the mating dimensional requirements of the components of the lipstick tube shown in figure 3 at B.

Reference numerals:

100. a lipstick tube; 10. an upper cover; 11. an inner cover; 111. an inclined step; 112. a first outer flange; 12. an outer cover; 13. a middle cover; 131. a third extension section; 14. a first magnetic member; 20. a bottom case; 21. an insole; 211. a first extension section; 212. a seal ring; 213. mounting grooves; 214. a first step; 215. a necking structure; 216. a second outer flange; 22. an outsole; 23. a middle sleeve; 231. a second extension section; 232. a second step; 24. a second magnetic member; 30. a core of the middle bundle; 40. and (5) weighting the weight.

The following detailed description of the invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "assembled" to another element, it can be directly disposed on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, a lipstick tube 100 with improved airtightness according to an embodiment of the present invention includes a bottom case 20 and an upper cover 10 fastened to each other, and an enclosed space formed by the bottom case 20 and the upper cover 10 is used for placing a middle wick 30 and lipstick paste.

The upper cover 10 is also of an at least two-layer structure nested inside and outside, the innermost layer of the upper cover 10 is an inner cover 11, and the inner cover 11 is made of metal materials; the bottom case 20 is also of at least two-layer structure nested inside and outside, the innermost layer of the bottom case 20 is an inner bottom 21, and the inner bottom 21 is made of metal. The upper cover 10 and the bottom case 20 are both at least two-layer structures, which is beneficial to improving the precision of lipstick assembly. Wherein, at least two-layer structure is understood as a two-layer structure or a three-layer structure nested with each other, and even more layers, the metal material can be the upper cover 10 such as copper, iron or alloy. It is understood that a metal material may be used for the layer structure other than the insole 21 and the inner lid 11 to further improve the sealing property.

The insole 21 has first extensions 211, the first extensions 211 being distributed around the circumference of the insole 21 for forming a nesting with the cover 10. The first extension 211 is a portion of the inner bottom 21, and compared with other layers of the bottom case 20 except the inner bottom 21, the first extension 211 extends out of the other layers, so as to form a state of exposed periphery.

The outer circumference of the first extension 211 is sleeved with a sealing ring 212 for improving the sealing performance of the snap-fit of the bottom case 20 and the upper cover 10. Under the state that bottom shell 20 and upper cover 10 are buckled, inner cap 11 covers the top periphery of inner bottom 21, that is, inner cap 11 wraps the periphery of first extension section 211, and under the effect of sealing washer 212, inner cap 11 and inner bottom 21 are in sealing fit, and a closed cavity for containing lipstick is formed. It is understood that the seal ring 212 may be, for example, an O-ring seal 212.

The lipstick tube 100 of improvement gas tightness that this embodiment provided establishes sealing washer 212 in order to improve the leakproofness of the closed chamber that holds lipstick cream through the first extension section 211 periphery cover at inner bottom 21, and inner bottom 21 and inner cup 11 all adopt the metal material simultaneously, when having avoided lipstick tube 100 to adopt the working of plastics, the partial micromolecule infiltration working of lipstick cream is the working of plastics and sees through the phenomenon that the working of plastics discharged outside lipstick tube 100, has solved the weightlessness problem of lipstick cream.

In one embodiment, both the inner lid 11 and the inner bottom 21 are tubular structures, closed on opposite sides and open on opposite sides and sealed for removable insertion. Referring to the orientation of fig. 1 and 3, in the use position, the inner lid 11 is positioned above the insole 21, and the side of the inner lid 11 opposite the insole 21, i.e., the top of the inner lid 11 and the bottom of the insole 21. The side of the inner lid 11 opposite to the inner bottom 21 is a portion where the inner lid 11 and the inner bottom 21 are engaged with each other, that is, a bottom end of the inner lid 11 and a top end of the inner bottom 21. The open state at the opposite side of the inner lid 11 and the inner bottom 21 facilitates the snap-fit to form a closed cavity with the inner space of the inner lid 11 and the inner bottom 21.

Further, the outer circumference of the first extension 211 is provided with an installation groove 213, and the sealing ring 212 is disposed in the installation groove 213. The packing 212 is fitted into the mounting groove 213. In the fastened state, the sealing ring 212 abuts against the first extension 211 and the inner lid 11 at the same time, and can be deformed to achieve a sealing effect when being pressed at the same time of the inner lid 11 and the inner bottom 21. The mounting groove 213 may be a groove opened in the circumferential direction of the first extension 211.

Referring to fig. 5, in order to improve the air tightness, there is a design requirement for the sizes of the sealing ring 212 and the mounting groove 213.

Preferably, the relation between the groove width b of the mounting groove 213 and the diameter d of the sealing ring 212 is: b is more than or equal to 1.1d and less than or equal to 1.3 d.

Preferably, the relation between the groove depth c of the mounting groove 213 and the diameter d of the sealing ring 212 is: c is more than or equal to 0.65d and less than or equal to 0.8 d.

Preferably, the interference a of the inner cover 11 and the diameter d of the sealing ring 212 are in the following relation: a is more than or equal to 0.04d and less than or equal to 0.12 d.

It is preferable that the area e of the inner lid 11 be polished with high precision so that the resistance of the packing 212 to the engagement of the upper lid 10 and the bottom case 20 is reduced as much as possible when the inner lid 11 is engaged with the inner bottom 21.

Preferably, the chamfer radius R of the bottom of the mounting groove 213 is 0.2mm to 0.3 mm.

Referring to fig. 1 and 2, in one embodiment, the upper cover 10 includes an outer cover 12, a middle cover 13, and an inner cover 11, and the outer cover 12, the middle cover 13, and the inner cover 11 are sequentially nested and fixed from outside to inside. It will be appreciated that the nested fastening may be by way of snap-fit, glue-bonding, etc.

Specifically, the outer cap 12 is flush with the open port of the middle cap 13 at the engagement portion, the open port of the inner cap 11 is located inside the open port of the middle cap 13, and the open port of the inner cap 11 is neither flush with the open port of the middle cap 13 nor extends out of the open port of the middle cap 13, that is, a portion of the middle cap 13 is longer than the inner cap 11, and a portion of the middle cap 13, which is longer than the inner cap 11, is a third extension 131.

Further, a weight 40 is disposed between the middle cap 13 and the outer cap 12 to increase the weight of the upper cap 10, increase the pressing force when the upper cap 10 is fastened to the bottom case 20, and improve the sealing performance, and at the same time, the user experience when the user separates and fastens the lipstick tube 100 is enhanced. The weight 40 is not limited in shape, and may be made of heavy iron, for example.

Specifically, the weight 40 is placed in a gap space formed between the middle cap 13 and the outer cap 12 in the axial direction, that is, a space formed between the closed end of the middle cap 13 and the closed end of the outer cap 12, rather than being disposed in a radially formed space, to reduce the radial width of the lipstick tube 100.

The bottom shell 20 comprises an outsole 22, a middle sleeve 23 and an insole 21, wherein the outsole 22, the middle sleeve 23 and the insole 21 are sequentially nested and fixed from outside to inside. It will be appreciated that the nested fastening may be by way of snap-fit, glue-bonding, etc. The first extension 211 of the insole 21 extends out of both the open port of the outsole 22 and the open port of the middle sleeve 23, and the middle sleeve 23 has a second extension 231 that extends out of the open port of the outsole 22.

In the fastened state, the outer cap 12 is aligned with the outer sole 22, the third extension 131 of the middle cap 13 surrounds the second extension 231 of the middle sleeve 23, the inner cap 11 surrounds the first extension 211 of the inner sole 21, and a sealing ring 212 is disposed between the inner cap 11 and the first extension 211.

Further, the bottom and top of the insole 21 are cylindrical and the middle section is square. The inner bottom 21 is inserted with the middle core 30, the outer periphery of the inner bottom 21 is provided with a first step 214, and the inner wall of the middle sleeve 23 is provided with a second step 232 which is abutted against the first step 214 for positioning in the axial direction. The first step 214 and the second step 232 are abutted to realize the nesting and fixing of the insole 21 and the middle sleeve 23.

Specifically, the insole 21 extends toward the open port through the first step 214 to form a first extension 211, and the middle sleeve 23 extends toward the open port through the second step 232 to form a second extension 231. The first extension 211 has an outer diameter smaller than that of the inner bottom 21, and the second extension 231 has an inner diameter smaller than that of the middle sleeve 23.

In this embodiment, the lipstick tube 100 is assembled in the following manner: and spraying hot melt adhesive into the middle cover 13, pressing the inner cover 11 in place by using a jig, putting the weighting block 40 into the outer cover 12, spraying the hot melt adhesive, pressing the inner cover 11 into the middle cover 13 by using the jig, and assembling into a finished cover product. The middle sleeve 23 is sleeved into the inner bottom 21, the oiled sealing ring 212 is sleeved into the inner bottom 21, then the middle bundle core 30 is pressed in, finally hot melt adhesive is sprayed into the outer bottom 22, the inner bottom 21 is assembled in place by using a jig, and the assembly of the finished product of the bottom is completed.

In one embodiment, referring to fig. 3 and 4, the upper cover 10 includes an outer cover 12 and an inner cover 11 that are nested and fixed from outside to inside, and the bottom case 20 includes an outer bottom 22 and an inner bottom 21 that are nested and fixed from outside to inside. Similarly, the nested fixing mode can adopt a clamping mode, a glue bonding mode and the like.

In the engaged position, the outer cover 12 is aligned with and abuts the outsole 22. The inner lid 11 is flush with the open port of the outer lid 12, the open port of the inner bottom 21 extends out of the outer bottom 22 to form a first extension 211, and the inner wall of the inner lid 11 abuts against the outer periphery of the first extension 211.

The inner bottom 21 is provided with a throat structure 215, and the inner wall of the inner lid 11 is provided with a slope step 111 matching with the throat structure 215. The throat structure 215 interacts with the sloped step 111 such that the insole 21 is engaged with the inner lid 11. The outer diameter of the first extension 211 is smaller than that of the insole 21 to form a throat structure 215, and the outer diameter of the throat structure 215 is gradually reduced in the open port direction to fit the slope step 111 of the throat structure 215. Specifically, the inner lid 11 has the same wall thickness as the inner bottom 21, and the sum of the wall thicknesses of the throat structures 215 and the inclined steps 111 is the same as the wall thickness of the inner lid 11.

Since the pressing force and the separating force caused by the strong-locking fit between the upper cover 10 and the bottom case 20 are large, the airtight ring or the sealing ring 212 is damaged by friction after the fitting is performed for many times, so that the airtightness of the lipstick tube 100 fails, and even scraps may be generated to contaminate lipstick. In one embodiment, the first magnetic member 14 is disposed in the radial gap between the outer cap 12 and the inner cap 11, the second magnetic member 24 is disposed in the radial gap between the outsole 22 and the insole 21, and the first magnetic member 14 and the second magnetic member 24 are attracted adjacent to each other in the fastened state. The attractive force between the upper cover 10 and the bottom case 20 is controlled by regulating the magnetic strength and the distance between the first magnetic part 14 and the second magnetic part 24, so that the good separating force and the pressing force between the upper cover 10 and the bottom case 20 are realized, and the stability and the durability of the air tightness are ensured.

It is understood that the first and second magnetic members 14 and 24 may be ring-shaped and are disposed around the inner lid 11 or the inner bottom 21. The first and second magnetic members 14, 24 may be magnets or other magnetically attractive members. The distance between the first magnetic member 14 and the second magnetic member 24 can be designed as required to achieve the proper separation force and insertion force.

Further, the opening portion of the inner cap 11 is provided with a first outer flange 112, the first outer flange 112 abuts against the inner wall of the outer cap 12 to close the radial gap between the outer cap 12 and the inner cap 11, and the first magnetic member 14 surrounds the outer periphery of the inner cap 11 and abuts against the first outer flange 112. Specifically, the first outer flange 112 extends radially from the open end of the inner cap 11 toward the outer cap 12 and abuts against the inner wall of the outer cap 12, and the thickness of the first outer flange 112 in the axial direction is smaller than the wall thickness of the inner cap 11.

The opening portion of the insole 21 is provided with a second outer flange 216, the second outer flange 216 abuts against the inner wall of the outsole 22 to close the radial gap between the outsole 22 and the insole 21, and the second magnetic member 24 surrounds the outer periphery of the insole 21 and abuts against the second outer flange 216. Specifically, the second outer flange 216 extends radially from the bottom of the first extension 211 toward the outsole 22 and abuts the inner wall of the outsole 22, and the thickness of the second outer flange 216 in the axial direction is smaller than the wall thickness of the insole 21. In the snap-fit condition, the first outer flange 112 is spaced apart from the second outer flange 216.

Further, a weight 40 is provided in a radial gap between the outer cap 12 and the inner cap 11, and a weight 40 is provided in a radial gap between the outsole 22 and the insole 21. It is understood that the weight 40 may be provided in the upper cover 10 or the lower cover 20 alone, or both the upper cover 10 and the lower cover 20 are provided with the weight 40. The weight 40 is disposed in a radial gap, rather than an axial gap, to reduce the length of the lipstick tube 100.

Specifically, the weight 40 is disposed adjacent to the open port of the upper cover 10 and the bottom case 20, and abuts against the first magnetic member 14 or the second magnetic member 24. The weighting blocks 40 are distributed around the outer periphery of the outer wall of the inner bottom 21 and can be fixedly connected with the outer wall of the inner bottom 21.

In this embodiment, the assembling method of the lipstick tube 100 may be: the first magnetic part 14 and the weighted iron are pressed into the inner cover 11, hot melt glue is sprayed on the outer cover 12, and the inner cover 11 and the outer cover 12 are assembled in place by using a jig. The sealing ring 212 is oiled and sleeved on the insole 21, the second magnetic member 24 and the weighting block 40 are pressed in, the middle bundle core 30 and the insole 21 are assembled by using a jig, and finally, the outer sole 22 is sprayed with hot melt adhesive, and the insole 21 and the outer sole 22 are assembled in place by using the jig.

The utility model provides a pair of lipstick tube 100 of improvement gas tightness includes one of following technological effect at least: the inner cover 11 and the inner bottom 21 which are made of metal materials are used for preventing lipstick cream from permeating and losing weight, and the sealing ring 212 is matched to improve the air tightness so as to solve the problem of weight loss of the lipstick tube 100; the magnetic part is matched with the sealing ring 212 to ensure the air tightness of the lipstick tube 100 and control the separating force between the upper cover 10 and the bottom shell 20; the dimensions of the mounting groove 213 and the sealing ring 212 are precisely designed.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A lipstick tube capable of improving air tightness comprises a bottom shell and an upper cover which are mutually buckled, and is characterized in that the bottom shell and the upper cover are of at least two-layer structures which are nested inside and outside, wherein the innermost layer of the upper cover is an inner cover made of metal, and the innermost layer of the bottom shell is an inner bottom made of metal;

one part of the insole is a first extension section with the periphery exposed, and a sealing ring is sleeved on the periphery of the first extension section; under the lock state, the inner cup parcel the periphery of first extension section, and pass through the sealing washer with interior bottom seal fit forms the closed chamber that holds a red cream.

2. The lipstick tube with improved airtightness according to claim 1, wherein said inner cap and said inner bottom are both of a cylindrical structure, opposite sides of which are closed, and opposite sides of which are open and hermetically movably inserted.

3. The lipstick tube with improved airtightness as claimed in claim 1, wherein an installation groove is provided on an outer periphery of the first extension, and the sealing ring is disposed in the installation groove.

4. The lipstick tube with improved airtightness as claimed in claim 1, wherein said upper cap comprises an outer cap, a middle cap and said inner cap which are fixed by nesting in order from outside to inside; the bottom shell comprises an outer bottom, a middle sleeve and the inner bottom which are sequentially nested and fixed from outside to inside;

one part of the middle sleeve is a second extension section extending out of the outsole, one part of the middle cover is a third extension section extending out of the inner cover, the third extension section surrounds the periphery of the second extension section in a buckling state, and the outer cover is aligned and abutted to the outsole.

5. The lipstick tube with improved airtightness as claimed in claim 4, wherein a middle core is inserted into the inner bottom, a first step is provided on the outer periphery of the inner bottom, and a second step is provided on the inner wall of the middle sleeve to abut against the first step for positioning in the axial direction.

6. The lipstick tube with improved airtightness as claimed in claim 4, wherein a weight is provided between the middle cap and the outer cap.

7. The lipstick tube with improved airtightness as claimed in claim 1, wherein said upper cap comprises an outer cap and said inner cap which are fixed by nesting in order from outside to inside; the bottom shell comprises an outer bottom and an inner bottom which are sequentially nested and fixed from outside to inside;

the inner bottom is provided with a necking structure, the inner wall of the inner cover is provided with an inclined step matched with the necking structure, and the outer cover and the outer bottom are aligned and abutted in a buckling state.

8. The lipstick tube with improved airtightness as claimed in claim 7, wherein a weight is provided in a radial gap between said outer cap and said inner cap, and a weight is provided in a radial gap between said outer sole and said inner sole.

9. The lipstick tube with improved airtightness according to claim 7, wherein a first magnetic member is provided in a radial gap between said outer cap and said inner cap, a second magnetic member is provided in a radial gap between said outer sole and said inner sole, and said second magnetic member are attracted adjacent to each other in a snap-fit state.

10. The lipstick tube with improved airtightness as claimed in claim 9, wherein the opening portion of the inner cap is provided with a first outer flange which abuts against an inner wall of the outer cap to close a radial gap between the outer cap and the inner cap, and the first magnetic member is wound around an outer periphery of the inner cap and abuts against the first outer flange;

the opening part of the insole is provided with a second outer flange which is abutted against the inner wall of the outsole to close the radial gap between the outsole and the insole, and the second magnetic piece surrounds the periphery of the insole and is abutted against the second outer flange.

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