CN219613231U - Two-way airtight zip fastener - Google Patents

Abstract

The utility model relates to a bidirectional airtight zipper, which comprises two symmetrically arranged zipper units; the zipper unit comprises a cloth belt, zipper teeth, a sealing layer and a sealing strip; the edge positions of the opposite sides of the cloth belt are provided with chain teeth which are arranged on the lower side of the cloth belt; the sealing layer is arranged on the upper side of the cloth belt; the sealing strip is arranged at the edge position of the opposite side of the sealing layer, the height of the sealing strip is larger than that of the sealing layer, and the sealing strip is connected with the cloth belt; the sealing strip comprises a straight part and an abutting part at the bottom; the straight part is connected with the cloth belt and extends out of the edge of the cloth belt; the abutting part is connected with the straight part at the bottom; the abutting part is provided with a groove. When the abutting parts of the sealing strips at the two sides are mutually extruded, the two grooves are mutually extruded to discharge part of air in the inner part, so that the air pressure in the accommodating cavity formed by the two grooves is originally smaller than the external pressure; therefore, the extrusion degree of the two sealing strips is further improved by utilizing the pressure difference between the inside and the outside, so that the air tightness and the water resistance of the airtight zipper are further improved.

Description

Two-way airtight zip fastener

Technical Field

The utility model relates to the technical field of zippers, in particular to a bidirectional airtight zipper.

Background

In the prior art, a common slide fastener includes a tape, fastener elements, and a slider. The opposite sides of the two cloth belts are provided with chain teeth; the pull head is slidably arranged on the two rows of the chain teeth so as to engage the two rows of the chain teeth into a whole.

Airtight zippers, also known as waterproof zippers, have evolved from conventional zippers. Specifically, the surface of the cloth belt of the airtight zipper is provided with a layer of waterproof TPU film, and the zipper teeth and the zipper head part are provided with airtight structures, so that airtight effect without air leakage is achieved, and waterproof effect is achieved.

The airtight zipper can be used for waterproof bags and other articles with waterproof requirements. When the waterproof bag carries shooting equipment to the seabed for shooting, the airtight zipper arranged on the waterproof bag is required to bear a large pressure effect. If the engaged teeth are subjected to a large pressure, the teeth arranged oppositely are dislocated relatively to form a gap, so that reliable sealing cannot be formed, and leakage is caused. Therefore, water vapor enters the waterproof bag along the gap of the airtight zipper, and the service life of shooting equipment is affected.

Therefore, the waterproof zipper with the sealing effect realized by only mutual occlusion of the unidirectional zipper teeth cannot meet the application scene of the waterproof bag.

Disclosure of Invention

In order to improve the sealing effect of the waterproof zipper, the utility model provides a bidirectional airtight zipper.

The utility model provides a bidirectional airtight zipper, which adopts the following technical scheme:

a bidirectional airtight zipper comprises two symmetrically arranged zipper units; the zipper unit comprises a cloth belt, zipper teeth, a sealing layer and a sealing strip; the edge positions of the opposite sides of the cloth belt are provided with chain teeth, and the chain teeth are arranged on the lower side of the cloth belt; the sealing layer is arranged on the upper side of the cloth belt; the sealing strip is arranged at the edge position of the opposite side of the sealing layer, the height of the sealing strip is larger than that of the sealing layer, and the sealing strip is connected with the cloth belt; the sealing strip comprises a straight part and an abutting part at the bottom; the straight part is connected with the cloth belt, and extends out of the edge of the cloth belt; the abutting part is connected with the straight part at the bottom; when the two side teeth are meshed, the two side abutting parts are mutually abutted; the abutting part is provided with a groove.

Through adopting above-mentioned technical scheme, when the tooth is mutually bitten into a whole under the effect of pull head to form the first seal structure of airtight zip fastener in strap downside, play the water-proof effects. Therefore, after the two zipper teeth are mutually meshed and connected, the abutting parts of the sealing strips are mutually extruded, so that a second sealing structure of the airtight zipper is formed on the upper side of the cloth belt, and the waterproof effect of the zipper is further improved. When the abutting parts of the sealing strips at the two sides are mutually extruded, after the two grooves are mutually extruded, part of air in the two grooves is discharged. The air pressure in the accommodating cavity formed by the two grooves is smaller than the external pressure, so that the extrusion degree of the two sealing strips is further improved by utilizing the internal and external pressure difference, and the air tightness and the water resistance of the airtight zipper are further improved.

Optionally, the bottom of the groove is an arc-shaped groove bottom, and openings of the arc-shaped groove bottoms at two sides are oppositely arranged.

By adopting the technical scheme, the arc-shaped groove bottom is convenient for the deformation of the groove body; to expel air from within the recess.

Optionally, along the central axis of the zipper, to both sides; the distance from the abutting portion to the straight portion decreases.

By adopting the technical scheme, when a user pulls the slider to close the zipper; the butt portion that the slope set up can make the sealing strip from top to bottom gradually looks extrusion butt to the airtight zip fastener of user closure of being convenient for.

Optionally, the groove is a strip groove; the length direction of the groove is consistent with the length direction of the zipper.

Through adopting above-mentioned technical scheme, when improving sealing strip gas tightness, the staff of being convenient for processes out the recess.

Optionally, the sealing strip comprises an arc-shaped protruding piece; the protruding piece is connected with the abutting portion, and the opening direction of the protruding piece faces to the tooth.

By adopting the technical scheme, the bulge on the upper part of the sealing strip can limit the outward deformation of the sealing strip, so that the extrusion degree between the abutting parts of the sealing element is improved.

Optionally, the sealing strip further comprises an arc-shaped transition piece; the transition piece is arranged between the protruding piece and the sealing layer, and the opening of the transition piece faces away from the teeth.

By adopting the technical scheme, when the protruding piece is stressed to deform, the transition piece abutted against the protruding piece can limit the outward movement of the protruding piece; thereby improving the limit effect of the protruding piece on the abutting part.

Optionally, the upper edge of the groove is flush with the upper edge of the sealing layer.

By adopting the technical scheme, the area of the butt extrusion of the sealing strips on the grooves is large enough to resist the acting force of external water pressure on the airtight zipper.

Optionally, the heat conducting piece is further included; the heat conducting piece is arranged in the sealing strip.

Through adopting above-mentioned technical scheme, when the staff uses the hair-dryer to weather the water stain on the airtight zip fastener, the heat conduction piece will be with this part heat transfer to the air of two recesses. The gas in the accommodating cavity is heated and expanded, so that the air pressure in the accommodating cavity is increased, and a user can separate the sealing strip conveniently.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. when a user tightens the airtight zipper, the zipper teeth meshed with the lower side of the cloth belt and the sealing strips extruded with the upper side of the cloth belt form two airtight structures of the airtight zipper respectively; thereby improving the air tightness and the water resistance of the airtight zipper at the bottom of the water.

2. When the abutting parts of the sealing strips at the two sides are mutually extruded, the two grooves are mutually extruded to discharge part of air in the inner part, so that the air pressure in the accommodating cavity formed by the two grooves is originally smaller than the external pressure; therefore, the extrusion degree of the two sealing strips is further improved by utilizing the pressure difference between the inside and the outside, so that the air tightness and the water resistance of the airtight zipper are further improved.

Drawings

Fig. 1 is a cross-sectional view showing the structure of the slide fastener in this embodiment.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a cross-sectional view showing the zipper structure of the present embodiment after the zipper structure is pulled together.

Fig. 4 is a schematic diagram showing a groove structure.

Reference numerals illustrate: 1. cloth belt; 2. a fastener element; 3. a sealing layer; 4. a sealing strip; 5. a straight portion; 6. an abutting portion; 7. a protruding member; 8. a transition piece; 9. a groove; 10. a heat conducting member.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the utility model discloses a bidirectional airtight zipper. Referring to fig. 1, the two-way airtight slide fastener includes two symmetrically disposed slide fastener units; after the two zipper units are connected, the airtight zipper is sealed and closed. In this embodiment, the airtight zipper is disposed on a waterproof bag, which can be used for shooting with photographic equipment at the water bottom.

Specifically, referring to fig. 1, both of the fastener elements include a tape 1, fastener elements 2, a sealing layer 3, and a weather strip 4. The opposite sides of the cloth belt 1 are provided with the chain teeth 2, and the chain teeth 2 are arranged at the lower side of the cloth belt 1. In this embodiment, the surface of the element 2 is also coated with a waterproof coating; therefore, when the zipper teeth 2 are mutually meshed into a whole under the action of the pull head, a first sealing structure of the airtight zipper is formed at the lower side of the cloth belt 1, and the waterproof effect is achieved.

The sealing layer 3 and the sealing strip 4 are arranged on the upper side of the cloth belt 1 and are fixedly connected with the cloth belt 1 through an adhesive. Wherein, sealing strip 4 sets up in sealing layer 3 one side near tooth 2. In this embodiment, the sealing layer 3 and the sealing strip 4 are all integrally formed from polyurethane elastic material. So that the sealing layer 3 and the sealing strip 4 have good deformability and waterproof performance.

Referring to fig. 1 and 2, the weather strip 4 includes a flat portion 5 of the bottom, an abutting portion 6, a protruding piece 7, and a transition piece 8 in this order in the counterclockwise direction of the weather strip 4. The straight part 5 at the bottom of the sealing strip 4 is fixedly connected with the cloth belt 1, and the straight part 5 extends out of the edge of the cloth belt 1. Therefore, after the two zipper teeth 2 are mutually meshed and connected, the sealing strips 4 on the two sides are mutually extruded, so that a second sealing structure of the airtight zipper is formed on the upper side of the cloth belt 1, and the waterproof effect of the zipper is further improved.

Referring to fig. 1 and 3, specifically, opposite sides of the two sealing strips 4 are abutting portions 6; when the two chain teeth 2 are mutually meshed, the abutting parts 6 of the two sealing strips 4 are mutually tightly abutted. Referring to fig. 1, the abutment portion 6 is inclined from bottom to top; specifically, the distance from the abutment 6 to the flat portion 5 decreases from the central axis of the slide fastener to both sides. Therefore, when a user pulls the pull head to enable the two side zipper teeth 2 to be meshed and the opposite sealing strips 4 to be abutted, the sealing strips 4 can be gradually extruded and abutted from top to bottom, and the airtight zipper is convenient for the user to close.

The degree of sealing between the two sealing strips 4 depends on the degree of mutual compression between the two sealing strips 4. Therefore, the airtight effect of the airtight zipper is improved, so that the waterproof effect of the waterproof bag is improved; we need to increase the interaction force between the two side sealing strips 4.

Referring to fig. 1 and 3, the protrusion 7 at the top of the sealing strip 4 is arc-shaped, and the opening of the protrusion 7 is provided toward the element 2. Therefore, when the sealing pieces at two sides are extruded, the sealing strip 4 can deform outwards, and the bulge piece 7 at the upper part of the sealing strip 4 can limit the outwards deformation amount of the sealing strip 4, so that the extrusion degree between the abutting parts 6 of the sealing pieces is improved.

The transition piece 8 is arranged between the protruding piece 7 and the sealing piece, and the transition piece 8 is also an arc-shaped piece, and the opening direction of the arc-shaped transition piece 8 is away from the tooth element 2. So that when the protrusion 7 is deformed by force, the transition piece 8 abutting against the protrusion 7 restricts the outward movement of the protrusion 7; thereby enhancing the limit effect of the protrusion 7 on the abutment 6.

Referring to fig. 1 and 3, in order to further improve the sealing effect of the airtight slide fastener. The abutting part 6 of the sealing strip 4 is provided with a groove 9; and the upper side of the groove 9 is abutted against the upper side of the sealing layer 3 to ensure that the sealing strip 4 on the groove 9 has a large enough area to be abutted against each other for extrusion, so that the resistance acting force of the sealing strip 4 to water pressure is improved.

When the abutting portions 6 of the sealing strips 4 on the two sides are mutually extruded, the air in the two grooves 9 is discharged after the two grooves 9 are mutually extruded. So that the air pressure in the accommodating cavity formed by the two grooves 9 is smaller than the outside water. Therefore, under the combined action of the containing cavity and the external water pressure, the mutual extrusion degree of the two sealing strips 4 is improved, and the air tightness and the waterproof effect of the airtight zipper are further improved.

In the process of extrusion abutting of the two sealing strips 4, air is extruded for facilitating deformation of the grooves 9; the bottom of the groove 9 should be an arc-shaped groove bottom so as to facilitate the deformation of the groove 9 body.

Referring to fig. 4, in the embodiment, the groove 9 is a long groove 9, and the length direction of the groove 9 coincides with the length direction of the slide fastener. Thereby ensuring that the waterproof zipper has a groove 9 with a large enough volume to improve the air tightness of the sealing strip 4, and being convenient for working staff to process the groove 9.

When the waterproof bag with the shooting equipment is taken out of water, a user can dry the water stain outside the waterproof bag, and the water stain on the surfaces of the waterproof bag and the waterproof zipper is clearly assisted by equipment such as a blower; then, the user pulls open the airtight zipper to take out the shooting equipment in the waterproof bag.

Therefore, referring to fig. 1 and 3, the sealing tape 4 is further referred to with a heat conductive member 10 in the middle to improve the heat conductive property of the sealing tape 4. The heat conductive member 10 may be made of metal particles, wires, or the like having a heat conductive function, so that the weather strip 4 has a certain heat conductivity while having an elastic deformation capability. In an embodiment, the heat conducting member 10 is a copper wire.

So that when a worker dries the water spot on the airtight slide fastener using a blower, the heat-conducting member 10 will transfer the part of the heat to the container cavity formed by the two grooves 9. The gas in the accommodating cavity is heated and collided, namely, the gas pressure in the accommodating cavity is increased. Thereby facilitating the user to pull open the separate airtight zipper.

When the waterproof zipper is applied to the water bottom, the temperature of the water body is low; so that the heat conducting member 10 transfers heat of the air in the recess 9 to the external water body. Thereby the air in the two grooves 9 is cooled and contracted, and the air pressure in the accommodating cavity formed by the two grooves 9 is further reduced. The size of the interaction force between the two sealing strips 4 is further improved under the action of external water pressure, and the air tightness and the waterproof performance of the airtight zipper are further improved.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. A bi-directional airtight zipper, characterized in that: comprises two symmetrically arranged zipper units; the zipper unit comprises a cloth belt (1), zipper teeth (2), a sealing layer (3) and a sealing strip (4); the edge positions of the opposite sides of the cloth belt (1) are provided with chain teeth (2), and the chain teeth (2) are arranged on the lower side of the cloth belt (1); the sealing layer (3) is arranged on the upper side of the cloth belt (1); the sealing strips (4) are arranged at the edge positions of the opposite sides of the sealing layer (3), and the height of the sealing strips (4) is larger than that of the sealing layer (3) and is connected with the cloth belt (1); the sealing strip (4) comprises a flat part (5) at the bottom and an abutting part (6); the straight part (5) is connected with the cloth belt (1), and the straight part (5) extends out of the edge of the cloth belt (1); the abutting part (6) is connected with the straight part (5) at the bottom; when the two side teeth (2) are meshed, the two side abutting parts (6) are mutually abutted; the abutting part (6) is provided with a groove (9).

2. The bi-directional airtight zipper of claim 1, wherein: the bottom of the groove (9) is an arc-shaped groove bottom, and the opening directions of the arc-shaped groove bottoms are opposite.

3. The bi-directional airtight zipper of claim 1, wherein: along the central axis of the zipper to the two sides; the distance from the abutting part (6) to the straight part (5) decreases.

4. The bi-directional airtight zipper of claim 1, wherein: the groove (9) is a strip-shaped groove (9); the length direction of the groove (9) is consistent with the length direction of the zipper.

5. The bi-directional airtight zipper of claim 1, wherein: the sealing strip (4) comprises an arc-shaped protruding piece (7); the protruding piece (7) is connected with the abutting part (6), and the opening direction of the protruding piece (7) is arranged towards the tooth element (2).

6. The bi-directional hermetic zipper of claim 5, wherein: the sealing strip (4) also comprises an arc-shaped transition piece (8); the transition piece (8) is arranged between the protruding piece (7) and the sealing layer (3), and the opening of the transition piece (8) faces away from the tooth element (2).

7. The bi-directional airtight zipper of claim 1, wherein: the upper edge of the groove (9) is flush with the upper edge of the sealing layer (3).

8. The bi-directional airtight zipper of claim 1, wherein: also comprises a heat conducting piece (10); the heat conducting piece (10) is arranged in the sealing strip (4).