CN104773232B - Foaming seat cushion - Google Patents

Abstract

The present invention discloses a foam seat cushion. The foam seat cushion includes a first shell, a second shell, a foam body and a reinforcement structure. The second shell is matched with the first shell. The foam body is formed in the filling groove of the first shell and is respectively combined with the first shell and the second shell. The reinforcement structure is embedded in the foam body. Through the above-mentioned structure, the first shell of the foam seat cushion of the present invention and the foam body have good bonding, and the foam body and the reinforcement structure also have good bonding.

Description

foam seat cushion

technical field

The present invention relates to a foam seat cushion, especially to such a foam seat cushion, which has a first shell and a foam body formed in the first shell, and a foam body is embedded in the foam body. The structure is strengthened, and the foam body is wrapped between the first shell and the second shell through a second shell being joined to the first shell.

Background technique

Known bicycle seat cushion 9 (China Taiwan patent M452113, I340706, M253539), as shown in Figure 14, it comprises a hard bottom shell 91, a foam body 92 and a skin 93, and wherein hard bottom shell 91 is generally The material is plastic or metal, the foam body 92 is made of polyethylene foam material, and the skin 93 is made of materials such as thermoplastic rubber, thermoplastic polyurethane, and polyethylene. The foam body 92 is attached to the top surface of the hard bottom case 91 , and the skin 93 is attached to the surface of the foam body 92 to protect the foam body 92 .

In the Taiwan Patent No. I323216 previously applied by the applicant, a method of manufacturing a foamed product is disclosed. The method is to first put a thermoplastic plastic skin into a mold, and inject a plurality of foamed particles into the mold. The foamed particles are foamed and formed by high temperature and pressure, and are hot-melted with the plastic skin at the same time, and finally a foamed product is obtained, which has the plastic skin and the polyethylene foamed particles. A foam formed by foaming.

Contents of the invention

The purpose of the present invention is to provide a new foam seat cushion.

The foam seat cushion of the present invention includes: a first shell, including a foam skin and a plastic film bonded to the outer surface of the foam skin; a second shell, which is a plastic shell and fits on the a first shell; and a foam body, located in the space formed by the combination of the first shell and the second shell, and the surface of the foam body is in contact with the first shell and the second shell combined inside.

In addition, the present invention also provides another foam seat cushion with a simpler structure, which includes a first shell and a second shell, the first shell includes a foam skin and the outer surface of the foam skin A plastic film, the second shell is combined with the inner surface of the foam skin, and the lower surface has a connecting portion for assembling to a frame of a bicycle.

Preferably, the first shell covers the entire upper surface and periphery of the second shell.

The above-mentioned foam seat cushion, wherein, the foam skin is preferably made of foam material with rubber added, foam material with rubber added and containing polyethylene or polypropylene, and ethylene/vinyl acetate copolymer It is made of one of the materials, and the plastic film is preferably made of one of ion polymer resin, thermoplastic rubber, thermoplastic polyurethane, polyethylene and polyurethane.

The characteristics and advantages of the foam seat cushion of the present invention are:

The foam seat cushion of the present invention includes a first shell, a second shell, a foam body and a strengthening structure. The second shell fits the first shell. The foam body is combined in the first shell and the second shell. The strengthening structure is embedded in the foam body.

On the other hand, the method for manufacturing the foam seat cushion includes the following steps. First, a multi-layer material is put into a mold for thermocompression forming to obtain a first shell, and a filling groove is provided in the first shell. Next, the first shell is put into another mold, and a plurality of foamed particles together with a reinforcing structure are put into the filling groove of the first shell. Next, the foamed particles are foamed to obtain a foamed body combined with the inner surface of the first shell, and the reinforcing structure is embedded in the foamed body. Finally, a second shell is joined to the first shell, and the inner surface of the second shell is combined with the foam body, and the foam body is wrapped between the second shell and the first shell . Preferably, the foamed particles are made of a foamed material containing polypropylene.

Specifically, the foam body has a top surface, a first side adjacent to the top surface, a second side adjacent to the first side, and a bottom adjacent to the second side. The inner surface of the first shell is combined with the top surface and the first side surface of the foam body. An inner surface of the second shell is combined with the bottom surface and the second side surface of the foam body.

The first shell includes a foam skin and a foam sheet combined with the inner surface of the foam skin. The foam skin is preferably formed by foaming a foam material added with rubber. Furthermore, the foam skin is formed by foaming a foam material containing rubber and polyethylene or polypropylene.

Preferably, the foam sheet includes a first foam sheet body and a second foam sheet body combined with the inner surface of the first foam sheet body; the outer surface of the first foam sheet body is combined with the foam sheet body The inner surface of the bubble skin. Wherein, the first foam sheet and the second foam sheet are formed by foaming a foam material containing polyethylene.

Preferably, the first shell further includes a plastic film bonded to the outer surface of the foam skin. Wherein, the plastic film is made of materials including sarin, thermoplastic rubber, thermoplastic polyurethane, polyethylene or polyurethane.

In addition, the second shell is a plastic shell, and is bonded together with the foam body by an adhesive.

The strengthening structure includes a body and a connection portion extending from the body, and the connection portion is configured to connect to an external fixing member. The connection part has a through hole passing through its two opposite sides; the second shell has two openings, respectively facing two opposite ends of the through hole of the connection part, and communicating with the through hole of the connection part.

Compared with the prior art, since the foamed body of the foamed seat cushion of the present invention is formed by foaming a plurality of foamed particles in the filling groove of the first shell, and the reinforced structure is also formed by the above-mentioned foaming process. Embedded in the foam body, so overall, the foam seat cushion of the present invention has a good combination, no matter between the foam body and the first shell, or between the foam body and the reinforced Between the structures, it is not easy to be separated due to the action of external force.

With the above structure, the foam seat cushion of the present invention has a good combination between the first shell and the foam body, and also has a good combination between the foam body and the reinforcing structure.

As for other invention contents and more detailed technical and functional descriptions of the present invention, they will be disclosed in the following description.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in,

Fig. 1 is a three-dimensional exploded view of a preferred embodiment of the foam seat cushion of the present invention.

Fig. 2 is a three-dimensional combined view of the preferred embodiment.

Fig. 3 is a schematic cross-sectional view of the preferred embodiment.

Fig. 4 is a schematic longitudinal sectional view of the preferred embodiment.

FIG. 5 is a schematic perspective view of a strengthening structure in the preferred embodiment.

Fig. 6 is a multi-layer structure used in the method for manufacturing a foamed seat cushion of the present invention.

FIG. 7 is a schematic cross-sectional view of the multilayer structure of FIG. 6 being hot-pressed into a first shell.

FIG. 8 is a schematic perspective view of FIG. 7 .

FIG. 9 shows a schematic cross-sectional view of a foam body formed in the first shell and a reinforcement structure embedded in the foam body.

FIG. 10 shows a schematic diagram of a second shell mated to the first shell shown in FIG. 9 with the foam body integrated therein.

Fig. 11 is an exploded perspective view of another embodiment of the foam seat cushion.

Fig. 12 is a three-dimensional assembled view of another embodiment of the foam seat cushion.

Fig. 13 is a schematic longitudinal sectional view of another embodiment of the foam seat cushion.

Fig. 14 shows an exploded perspective view of a known foam seat cushion.

Explanation of main component labels:

1 foam seat cushion

11 First housing 10 Filling slot

110 foam leather 111 plastic film

112 Foam sheet 113 The first foam sheet

114 second foam sheet body 115 inner surface

12 Second housing 120 opening

121 inner surface

15 foam body 150 top surface

151 First side 152 Second side

153 Bottom

17 Reinforced structure 170 Main body

175 Connection 176 Perforation

21 First shell 210 Foam leather

211 plastic film

22 Second shell 220 Body

221 Assembly part 222 Assembly hole

6 multilayer structure 60 plastic film

61 foam leather 62 foam sheet

621 The first foam sheet 622 The second foam sheet

9 Bicycle saddle 91 Hard shell

92 Foam 93 Skin

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

Fig. 1, Fig. 2 and Fig. 3 show a preferred embodiment of the foam seat cushion of the present invention. The foam seat cushion 1 includes a first shell 11, a second shell 12 that can be matched to the first shell 11, a foam body 15 combined in the first shell 11 and the second shell 12, And a reinforcing structure 17 embedded in the foam body 15 .

Wherein, as shown in FIG. 3 and FIG. 4 , the first shell 11 includes a foam skin 110 , a plastic film 111 combined on the outer surface of the foam skin 110 , and a foam sheet 112 . It should be noted that, in this embodiment, in order to provide sufficient thickness of the first shell 11, the foam sheet 112 includes a first foam sheet body 113 bonded to the inner surface of the foam skin 110, and bonded to A second foam sheet 114 is formed on the inner surface of the first foam sheet 113 . However, a piece of foam sheet with sufficient thickness can also be used alone instead, and it is not limited thereto. More specifically, the foam skin 110 is formed by foaming a foam material containing rubber and containing polyethylene (PE) or polypropylene (PP), and its foaming density is between Between 2pcf and 8pcf, therefore, the foam skin has the characteristics of elasticity and softness at the same time. The foam skin 110 can also be made of ethylene/vinyl acetate copolymer (Ethylene Vinyl Acetate, EVA). The plastic film 111 is made of a material with wear resistance and anti-skid properties, such as: ionomer resin (such as dupont's sarin resin (Surlyn resin), thermoplastic rubber (thermoplastic rubber, TPR), thermoplastic polyurethane (thermoplastic polyurethane, TPU), polyethylene (PE) or polyurethane (polyurethane, PU). The first foam sheet 113 and the second foam sheet 114 are formed by foaming polyethylene (PE) foam material, and the foam density is about 2pcf.

The foam body 15 can be made of expanded polystyrene (Polystyrene, PS), preferably made of foamed material containing polypropylene (PP), and has a top surface 150 adjacent to A first side 151 of the top surface 150 , a second side 152 adjacent to the first side 151 , and a bottom 153 adjacent to the second side 152 . Preferably, the top surface 150 and the first side surface 151 of the foam body 15 are directly combined with the inner surface 115 of the second foam sheet 114 of the first shell 11, or through a bonding film The way (not shown in the figure) is combined with the inner surface 115 of the second foam sheet body 114 depends on the materials selected for the foam body 15 and the second foam sheet body 114 .

The second shell 12 is a plastic shell formed by plastic injection molding, and its inner surface 121 is preferably glued together with the second side surface 152 and the bottom surface 153 of the foam body 15 by an adhesive (not shown in the figure). The adhesive can be coated on the inner surface 121 of the second shell 12 , or coated on the second side surface 152 and the bottom surface 153 of the foam body 15 .

Referring to FIG. 3 , FIG. 4 and FIG. 5 , in this embodiment, the reinforcement structure 17 includes a body 170 and two connecting portions 175 extending from the body 170 . The body 170 is completely embedded in the foam body 15 to enhance the structural strength of the foam body 15 . The two connecting portions 175 are configured to connect to an external fixing member (not shown in the figure), such as a frame of a bicycle. However, depending on different requirements, the reinforcing structure 17 may also have only one connecting portion or more connecting portions. Specifically, in this embodiment, each connecting portion 175 has a through hole 176 passing through its two opposite sides. The two openings 120 of the second housing 12 communicate with the outside, as shown in FIG. 3 , for passing and combining the external fixing member.

6 to 10 show the method for manufacturing the above-mentioned foam seat cushion 1 . First, as shown in FIG. 6 , a multi-layer material 6 is provided. The multi-layer material 6 includes a foam skin 61 , a plastic film 60 is thermally pasted on its outer surface, and a foam sheet 62 is thermally pasted on its inner surface. Wherein, the foam sheet 62 includes a first foam sheet body 621 and a second foam sheet body 622 bonded to each other. The outer surface of the first foam sheet body 621 is thermally attached to the foam skin 61 . The outer surface of the second foam sheet 622 is thermally attached to the inner surface of the first foam sheet 621 . Preferably, the thickness of the plastic film 60 is between 0.01 and 0.5mm, the thickness of the foam skin 61 is between 2mm and 3mm, the first foam sheet 621 and the second foam sheet 622 The thickness is 5mm respectively. In other words, the total thickness of the multi-layer material 6 is about 12 mm to 13.5 mm. In addition, the plastic film 60, the foam skin 61 and the foam sheet 62 have the same material and Foam density and other characteristics.

Then, put the multilayer material 6 into a mold (not shown) and heat press it into a predetermined shape to obtain the first shell 11 as described above. At this time, the plastic film 60 and foam of the multilayer material 6 The skin 61 and the foam sheet 62 become the plastic film 111 , the foam skin 110 and the foam sheet 112 in the aforementioned first housing 11 . In addition, the first casing 11 has a filling groove 10 inside, as shown in FIG. 7 and FIG. 8 . It is worth noting that the multi-layer material 6 will be extruded during the hot pressing process to make its thickness thinner. Specifically, after the multi-layer material 6 is hot-pressed to form the first shell 11, its The thickness is about 8mm, which is thinner than its original thickness.

Next, put the first shell 11 into another mold (not shown), and put a plurality of expanded particles into the filling groove 10 of the first shell 11 together with a reinforcing structure 17 (Fig. 5) . Preferably, the foamed particles can be made of expanded polystyrene, preferably made of a foamed material containing polypropylene. Next, the foamed particles are foamed to form the aforementioned foam body 15 . During the foaming process, the inner surface 115 of the second foam sheet body 114 located at the innermost side of the first shell 11 will be heated and present a slightly melted state. Therefore, after the foaming body 15 is foamed, it will The inner surfaces 115 of the first shell 11 are closely melted together, and the reinforcement structure 17 is embedded in the foam body 15 , as shown in FIG. 9 . In addition, the through hole 176 of the connecting portion 175 of the reinforcement structure 17 is exposed to the foam body 15 . In addition, between the inner surface 115 of the second foam sheet 114 and the foam body 15, a bonding film, such as a copolymer, may be used to form a connection between the inner surface 115 of the second foam sheet 114 and the foam body 15 due to the difference in the materials of the two. The material of the two foam sheets 114 and the material of the foam body 15 are collectively polymerized, so as to combine the second foam sheet 114 and the foam body 15 together, but this does not mean that limit.

Finally, as shown in FIG. 10 , a second shell 12 is matched to the first shell 11, and the inner surface of the second shell 12 is bonded to the foam body 15, so that the foam body 15 is covered. Between the second shell 12 and the first shell 11 , as shown in FIG. 3 . Wherein, the opening 120 of the second shell 12 is just in front of the through hole 176 of the connecting portion 175 of the reinforcing structure 17 after the assembly is completed.

It can be seen from the above description that the present invention provides a foam seat cushion with good bonding properties. The foam body is formed by foaming in the filling groove of the first shell, and is closely combined with the first shell, so that it is not easy to Separated by external force. In addition, the reinforcing structure is placed between the foam particles during the foaming process of the foaming body, so that the reinforcing structure is firmly embedded in the foaming body after the foaming of the foaming body is completed .

Fig. 11, Fig. 12 and Fig. 13 show another embodiment of the present invention, and the foam seat cushion 2 shown in it is similar to above-mentioned foam seat cushion 1, and the difference is that a first shell of foam seat cushion 2 21 is composed of a foam skin 210 and a plastic film 211, and is directly bonded to a second shell 22 by glue. In this example, the foam body 15 , reinforcement structure 17 and foam sheet 112 in the above foam seat cushion 1 are not used, and the structure is quite simple.

In addition, a preferred manufacturing method of the foam seat cushion 2 is to combine the first outer shell 21 and the second outer shell 22 after the first outer shell 21 and the second outer shell 22 are manufactured, for example, glue them together. Wherein, the manufacturing step of the first shell 21 includes combining a flat plastic film with a flat foam skin by hot pressing, and then putting the combined plastic film and foam skin into a forming mold Heating is performed, whereby the first shell 21 having a predetermined cushion shape is formed. In this example, the plastic film is made of one of thermoplastic polyurethane (thermoplastic polyurethane, TPU), ionomer resin, thermoplastic rubber, thermoplastic polyurethane, polyethylene and polyurethane, and the foam skin is made of ethylene/acetic acid Ethylene Vinyl Acetate (EVA), rubber-added foam material, rubber-added foam material containing polyethylene or polypropylene is made of one of the materials. The second shell 22 is injection molded by plastic injection, and it has a plurality of assembly parts 221 for assembly on the frame of a bicycle (not shown in the figure), wherein each of the assembly parts 221 has a plurality of assembly parts. Hole 222.

Another method is to place the formed first shell 21 in a plastic injection molding mold, and then inject molten plastic material into the plastic injection molding mold, so that the second casing formed by the plastic material The shell 22 can form a tight combination with the first shell 21 without using glue. In addition, as shown in FIG. 13, the first shell 21 covers the entire upper surface and periphery of the second shell 21, so that when a user sits on the foam seat cushion 2, his thighs are in contact with the soft first shell. The first shell 21 is in contact with the hard second shell 22 , so the user can sit comfortably on the foam seat cushion 2 .

The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention. And it should be noted that each component of the present invention is not limited to the above-mentioned overall application, and each technical feature described in the description of the present invention can be selected to be used alone or in combination according to actual needs. Therefore, the present invention Other combinations and specific applications related to the invention of this case are naturally covered.

Claims (1)

1. A foamed seat cushion, comprising:

a first housing including a foam skin and a plastic film bonded to an outer surface of the foam skin, wherein the foam skin is made of one of a foam material added with rubber, a foam material added with rubber and containing polyethylene or polypropylene, and an ethylene/vinyl acetate copolymer, and the plastic film is made of one of an ionomer resin, a thermoplastic rubber, polyethylene, and polyurethane; and

the second shell is combined with the inner surface of the foaming skin, wherein the first shell covers the whole upper surface and the periphery of the second shell;

and the assembling part extends from the lower surface of the second shell and is used for assembling to a frame of a bicycle, the assembling part is provided with a plurality of assembling holes, and the assembling part and the second shell are integrally formed by injection molding in a plastic injection mode.