CN216822502U

CN216822502U - Pull strap and inflatable product with same

Info

Publication number: CN216822502U
Application number: CN202122958269.9U
Authority: CN
Inventors: 刘劲麟
Original assignee: Mingda Optoelectronic Xiamen Co ltd
Current assignee: Mingda Optoelectronic Xiamen Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-06-28
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a drawstring which comprises a line body group and plastic strips, wherein the line body group is formed by parallelly arranging a plurality of line bodies in a plane, each line body comprises a head end, a tail end and a middle section, the plastic strips which are vertically arranged with the line bodies are welded at the head end and the tail end of each line body, and the head end and the tail end of each line body are coated with plastic materials which can be welded with the plastic strips. The outer layer of the wire body of the drawstring is coated with a layer of plastic material with a polarized molecular structure to form a composite coating wire, so that the plastic material on the outer layer of the composite coating wire can also participate in welding in the process of high-frequency welding, the wire body can be tightly adhered with the sheet body or the plastic sheet strip of the inflatable product, the plastic sheet strip is not only simply adhered together, the adhesion strength of the wire body of the drawstring can be greatly increased, the drawstring is prevented from being pulled away, and the service life of the product is prolonged.

Description

Pull strap and inflatable product with same

Technical Field

The utility model relates to the technical field of inflatable products, in particular to a drawstring and an inflatable product with the drawstring.

Background

The inflatable product utilizes soft materials to form a closed air chamber, and air is pumped into the closed air chamber to maintain certain air pressure so as to support various activities of the human body on the closed air chamber for use. Such as an air bed.

The manufacturing method of the inflatable bed is that soft materials are bonded together to form a closed air chamber through a welding process such as high-frequency welding, and gas inside the inflatable bed is prevented from leaking to the outside.

In order to maintain the shape of the inflated bed after being inflated and prevent the deformation of the bed body caused by the stretching of the soft material of the inflated bed, the structural strength of the inflated bed is enhanced by using a thread pull belt or a cloth pull belt and the like.

The cloth drawstrings are generally made of the same material as the outer layer of the air bed, mainly because different materials are connected together in a welding mode due to different material characteristics of different materials in the welding process, the difficulty in the process is increased, enough bonding strength cannot be generated, and the inner drawstrings are made of the same material as the outer layer of the air bed, so that the required bonding strength is achieved easily.

The thread drawstring can be made of the same material as the outer layer of the inflatable bed and different materials from the outer layer, and is made of upper and lower strips which are soft materials capable of being welded by high frequency.

Utilize high frequency (radio frequency) heating two upper and lower strips, utilize proper pressure with two upper and lower strips bonding together, and these drawstrings do not obtain sufficient energy and soften melting it so that with two upper and lower strips tightly bonding, only by two upper and lower strips cladding inside that are pasted together, such structure is in the use, because of the air inflation of air bed, inside atmospheric pressure makes the air inflation bed inflation, cause the drawstring to be stretched, lead to the drawstring because of the bonding intensity is not enough, and easily taken out between two upper and lower strips, and then influence the life of air inflation bed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drawstring and an inflatable product with the same, which can overcome the defects of the existing product, greatly increase the bonding strength of a line body of the drawstring and prevent the drawstring in the inflatable product from being pulled out.

In order to achieve the above purpose, the solution of the utility model is:

The utility model provides a drawstring, includes line body group and plastic film strip, line body group is arranged by many line bodies in a plane parallel and forms, the line body includes head end, tail end and middlings section, the head end and the tail end welding of the line body have with the line body sets up perpendicularly the plastic film strip, the head end and the tail end cladding of the line body have can with the plastic material of plastic film strip butt fusion.

Further, the middle section of the wire body is a bare wire.

Furthermore, the middle section of the wire body is coated with the plastic material.

Furthermore, one or two plastic strips at the head end of the line body are arranged on one side or two sides of the head end of the line body respectively; one or two plastic strips at the tail end of the line body are arranged on one side or two sides of the tail end of the line body respectively.

Preferably, the head end and the tail end of the wire body are coated with plastic materials with polarized molecular structures, and the plastic strips are made of plastic with polarized molecular structures.

Preferably, the diameter of the wire body is between 0.05mm and 0.3 mm.

Preferably, the width of the plastic sheet strip is 5mm-30mm, and the thickness of the plastic sheet strip is 0.08mm-0.5 mm.

Preferably, the plastic material is PVC, EVA copolymer, TPU or polyurethane.

The utility model also provides an inflatable product, which comprises the drawstring, wherein the drawstring is connected between the sheet bodies of the inflatable product so as to draw out the shape required by the inflatable product.

The utility model adopts the technical scheme, and has the advantages that:

the outer layer of the wire body of the drawstring is coated with a layer of plastic material with a polarized molecular structure (the plastic material is a material which can be subjected to high-frequency welding with the sheet body of an inflatable product or the plastic sheet strip of the drawstring) to form a composite coating wire, so that the plastic material on the outer layer of the composite coating wire can also participate in welding in the process of high-frequency welding, the wire body can be tightly adhered with the sheet body or the plastic sheet strip of the inflatable product, and not only the plastic sheet strip is simply adhered together, so that the adhesion strength of the wire body of the drawstring can be greatly increased, the drawstring is prevented from being pulled away, and the service life of the product is prolonged.

Drawings

FIG. 1 is an exploded view of an air bed of the present invention;

FIG. 2 is a schematic perspective view of a drawstring according to a first embodiment of the present invention;

fig. 3 is an exploded schematic view of the drawstring according to the first embodiment of the present invention, illustrating that a plastic strip at the head end or the tail end is provided with a sheet;

Fig. 4 is an exploded schematic view of the draw tape according to the first embodiment of the present invention, which illustrates that two plastic strips at the head end or the tail end are provided;

fig. 5 is a schematic perspective view of a drawstring according to a second embodiment of the present invention.

Description of the symbols:

air bed 100

Drawstring 10

Line body group 1 line body 01

Plastic material 14 in the middle section 13 of the head end 11 and the tail end 12

Plastic film strip 2

The lower sheet 30 of the upper sheet 20 is surrounded by an inflation nozzle 40 41.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1, the inflatable product according to the embodiment of the present invention is specifically described by taking an inflatable bed 100 as an example, where the inflatable bed 100 includes a drawstring 10, an upper sheet 20, a lower sheet 30 and a side wall 40, two ends of the drawstring 10 are respectively connected and fixed to the upper sheet 20 and the lower sheet 30, two ends of the side wall 40 are respectively connected and fixed to a lower edge of the upper sheet 20 and an upper edge of the lower sheet 30, so that the side wall 40, the upper sheet 20 and the lower sheet 30 form an inflation chamber, and the side wall 40 is provided with an inflation nozzle 41.

The pull strap 10 of the present invention may also be used with other inflatable products such as inflatable boats, inflatable toys, and the like.

The first embodiment is as follows:

as shown in fig. 2 to 4, the present embodiment discloses a pull tape 10, which includes a line body group 1 and a plastic strip 2, wherein the line body group 1 is formed by a plurality of line bodies 01 arranged in parallel in a plane, the line body 01 includes a head end 11, a tail end 12 and a middle section 13, the head end 11 and the tail end 12 of the line body 01 are coated with a plastic material 14, the head end 11 and the tail end 12 of the line body 01 are welded with the plastic strip 2 perpendicular to the line body 01, the plastic material 14 coated with the line body 01 and the plastic strip 2 are welded with each other, the plastic material 14 has a polarized molecular structure, and the plastic strip 2 is made of plastic with the polarized molecular structure.

In this embodiment, in order to reduce the material cost, the middle section 13 of the wire body 01 is a bare wire.

In this embodiment, as shown in fig. 3 and 4, in order to facilitate welding the drawstring 10 to the air bed 100, one or two plastic strips 2 at the head end 11 or the tail end 12 of the wire body 01 are respectively disposed at one side or two sides of the head end 11 or the tail end 12 of the wire body 01. If the plastic sheet strip 2 is provided as one piece, the material cost can be reduced under the condition that the tensile strength is satisfied. If the plastic film strip 2 is provided with two pieces, the welding is tighter, and the tensile strength is better. One or two plastic film strips 2 are arranged according to the needs of the product.

Preferably, the plastic material 14 having a polarized molecular structure may be PVC, EVA copolymer, TPU or Polyurethane (PU).

Preferably, the diameter of the wire body 01 is between 0.05mm and 0.3mm, and the wire body 01 with the diameter has enough tension and light weight.

In addition, preferably, the width of the plastic strip 2 is 5mm-30mm, and the thickness is 0.08mm-0.5mm, so that the plastic strip 2 with the size can meet the requirement of welding strength and save materials.

Example two:

as shown in fig. 5, the difference between the present embodiment and the first embodiment is that the middle section 13 of the wire body 01 is coated with the plastic material 14. That is, in this embodiment, the entire section of the wire body 01 is coated with the plastic material 14. This method of coating requires more plastic material 14 to coat, but there may be more coating methods, and they may be selected as desired.

In the present invention, the fusion of the drawstring 10 and the inflatable product, and the fusion of the wire body 01 of the drawstring 10 and the inflatable product or the plastic sheet strip 2 are high frequency fusion, the high frequency fusion technique adopts radio frequency welding, and the radio frequency welding is completed by applying high frequency current to two or more layers of thermoplastic materials placed between two sealing electrodes or a mold. The mold is typically mounted in a pneumatic or hydraulic press to provide pressure to fuse the materials. When the generated high frequency current heats and melts the material, a seal is formed and the pressure exerted on the material causes the material to completely fuse. The current is then turned off, allowing the material to solidify during a brief cooling period, completing the seal.

This heating effect occurs because the dielectric molecular material itself has a polarized molecular structure, and the electric dipoles of these polarized molecules align with the direction of the electric field, trying to orient or polarize with the high frequency electromagnetic field. If the high-frequency welding apparatus is 27.12MHz, since the electric field is reversed 2712 ten thousand times per second (27.12MHz), internal friction occurs between molecules, thereby generating high heat to melt and bond the materials together.

The high frequency welding technology is suitable for coating materials with polarized molecular structures such as PVC, EVA copolymer, TPU or Polyurethane (PU).

According to the utility model, the outer layer of the wire body 01 of the drawstring 10 is coated with a layer of plastic material 14 with a polarized molecular structure (the plastic material 14 is a material which can be subjected to high-frequency welding with the sheet body of the inflatable product or the plastic sheet strip 2 of the drawstring 10) to form the composite coated wire, so that the plastic material 14 on the outer layer of the composite coated wire can also participate in welding in the high-frequency welding process, the wire body 01 can be tightly adhered with the sheet body of the inflatable product or the plastic sheet strip 2, and the plastic sheet strip 2 is not only adhered together, so that the adhesion strength of the wire body 01 of the drawstring 10 can be greatly increased, the wire drawstring 10 is prevented from being pulled away, and the service life of the product is prolonged.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a stretching strap, includes line body group and plastic film strip, line body group is arranged by many line bodies in a plane parallel and forms, the line body includes head end, tail end and middlings section, the head end and the tail end welding of the line body have with the line body sets up perpendicularly the plastic film strip, its characterized in that: the head end and the tail end of the wire body are coated with plastic materials which can be welded with the plastic strips.

2. The draw tape of claim 1, wherein: the middle section of the wire body is a bare wire.

3. The draw tape of claim 1, wherein: the middle section of the wire body is coated with the plastic material.

4. The draw tape of claim 1, wherein: the plastic strip at the head end of the wire body is provided with one or two plastic strips which are respectively arranged at one side or two sides of the head end of the wire body; the plastic strip at the tail end of the wire body is provided with one or two plastic strips which are respectively arranged at one side or two sides of the tail end of the wire body.

5. The draw tape of claim 1, wherein: the plastic material is a plastic material with a polarized molecular structure, and the plastic strip is made of plastic with a polarized molecular structure.

6. The draw tape of claim 5, wherein: the plastic material is PVC, EVA copolymer, TPU or polyurethane.

7. The draw tape of any one of claims 2 or 3, further characterized by: the diameter of the wire body is 0.05mm-0.3 mm.

8. The draw tape of claim 7, wherein: the width of the plastic sheet strip is 5mm-30mm, and the thickness of the plastic sheet strip is 0.08mm-0.5 mm.

9. An inflatable product characterized by: comprising a pull tape according to any one of claims 1-6 or 8 connected between sheets of an inflatable product to pull out a desired shape of the inflatable product.