Sound insulation type automobile carpet

Abstract

The utility model provides a sound insulation type automobile carpet which comprises a first polyurethane foam sound insulation layer, a second polyurethane foam sound insulation layer, a third polyurethane foam sound insulation layer and a fourth polyurethane foam sound insulation layer which are sequentially bonded from bottom to top. The apparent density of the first polyurethane foam sound insulation layer is smaller than that of the second polyurethane foam sound insulation layer, and the apparent density of the third polyurethane foam sound insulation layer and the apparent density of the fourth polyurethane foam sound insulation layer are not smaller than that of the first polyurethane foam sound insulation layer. The four polyurethane foam sound insulation layers with different apparent densities are utilized to form the sound insulation type automobile carpet main body, so that the noise transmission path is complicated, and the sound absorption and sound insulation performance is maximized; meanwhile, the sound insulation type automobile carpet is composed of the polyurethane foam sound insulation layers with different apparent densities, and a high-density heavy sound insulation layer is not added, so that the weight of the sound insulation type automobile carpet can be maintained in a lighter state, and a user can conveniently carry and clean the sound insulation type automobile carpet subsequently.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a sound-insulating car carpet. Background Technology

[0002] The main functions of automotive soundproofing carpets (carpets laid on the floor of a car) are: to reduce interior noise and improve quietness by isolating road noise and tire noise, and blocking chassis noise; to improve ride comfort and reduce vibration transmission. The damping layer in the soundproofing carpet can effectively suppress sheet metal vibration and reduce the vibration transmitted to the passenger's feet and body, making the ride smoother and more comfortable.

[0003] In existing technologies, the materials used in car soundproofing carpets to suppress noise are mostly polyurethane foam. Polyurethane foam has excellent sound absorption properties, but its sound insulation performance is poor. To address this, some car carpet manufacturers add high-density materials to the car soundproofing carpets to improve the poor sound insulation performance of polyurethane foam alone. However, adding high-density sound insulation materials significantly increases the weight of the entire car soundproofing carpet. Heavier car soundproofing carpets can cause some inconvenience for users during subsequent carpet cleaning. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a soundproof car carpet with good sound insulation effect and low weight.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides a sound-insulating car carpet, comprising a first polyurethane foam sound insulation layer, a second polyurethane foam sound insulation layer, a third polyurethane foam sound insulation layer, and a fourth polyurethane foam sound insulation layer bonded together from bottom to top. The apparent density of the first polyurethane foam sound insulation layer is less than the apparent density of the second polyurethane foam sound insulation layer, and the apparent densities of the third and fourth polyurethane foam sound insulation layers are not less than the apparent density of the first polyurethane foam sound insulation layer.

[0007] Furthermore, the apparent density of the first polyurethane foam sound insulation layer is 60–140 kg / m³. 3 The apparent density of the second polyurethane foam sound insulation layer is 160–280 kg / m³. 3 .

[0008] Furthermore, the apparent density of the third and fourth polyurethane foam sound insulation layers is 60–280 kg / m³. 3 .

[0009] Furthermore, it also includes a PET absorbent layer, which is adhered to the outer surface of the fourth polyurethane foam sound insulation layer.

[0010] Furthermore, it also includes a massage layer, which is disposed between the PET absorbent cotton layer and the fourth polyurethane foam sound insulation layer. The massage layer has multiple interconnected airbags spaced apart inside, and the airbags are connected to an external air pump, which is used to control the inflation or deflation of the airbags.

[0011] Furthermore, the massage layer includes an upper massage layer and a lower massage layer. Multiple mounting slots for mounting the airbags are evenly provided at the end faces of the upper and lower massage layers that are in contact with each other. A connecting channel is provided between the multiple mounting slots, and the connecting channel is used to install a connecting tube that connects the multiple airbags. Beneficial effects

[0012] This embodiment uses the aforementioned sound-insulating car carpet, which consists of four layers of polyurethane foam sound insulation layers with different apparent densities to form the main body of the sound-insulating car carpet. This complicates the noise transmission path, thereby maximizing the sound absorption and sound insulation performance. At the same time, since the sound-insulating car carpet is composed of polyurethane foam sound insulation layers with different apparent densities and does not include high-density heavy-duty sound insulation layers, the weight of the sound-insulating car carpet can be maintained at a relatively light level, making it easy for users to move and clean it later. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the sound-insulating car carpet in the embodiments of this application.

[0014] Figure 2 This is a schematic diagram of the sound-insulating car carpet in the embodiment of this application, viewed from below.

[0015] Figure 3 for Figure 2 A schematic diagram of the AA-direction cross-section structure.

[0016] Figure 4 This is an exploded view of the installation and assembly structure of the sound-insulating car carpet in the embodiments of this application.

[0017] Figure 5 This is an exploded view of the massage layer installation and assembly in an embodiment of this application.

[0018] Figure 6 This is an exploded view of the installation and assembly structure of the first polyurethane foam sound insulation layer, the second polyurethane foam sound insulation layer, the third polyurethane foam sound insulation layer and the fourth polyurethane foam sound insulation layer in the embodiments of this application.

[0019] In the picture:

[0020] 100-Soundproof car carpet;

[0021] 10-PET absorbent cotton layer;

[0022] 20 - Massage layer; 21 - Upper massage layer; 22 - Lower massage layer; 23 - Air pump; 24 - Mounting slot; 25 - Connection channel;

[0023] 31-First polyurethane foam sound insulation layer; 32-Second polyurethane foam sound insulation layer; 33-Third polyurethane foam sound insulation layer; 34-Fourth polyurethane foam sound insulation layer. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] See appendix Figure 1 To be continued Figure 4 and attached Figure 6 As shown, this embodiment provides a sound-insulating car carpet 100, comprising a first polyurethane foam sound insulation layer 31, a second polyurethane foam sound insulation layer 32, a third polyurethane foam sound insulation layer 33, and a fourth polyurethane foam sound insulation layer 34, which are sequentially bonded from bottom to top. For example, the thickness of the first polyurethane foam sound insulation layer 31 is 5 mm, the thickness of the second polyurethane foam sound insulation layer 32 is 10 mm, and the thicknesses of the third polyurethane foam sound insulation layer 33 and the fourth polyurethane foam sound insulation layer 34 are both 5 mm. The first polyurethane foam sound insulation layer 31 has a low apparent density, for example, an apparent density of 60–140 kg / m³. 3 The apparent density of the second polyurethane foam sound insulation layer 32 is greater than that of the first polyurethane foam sound insulation layer 31, for example, using an apparent density of 160-280 kg / m³. 3 The apparent density of the third polyurethane foam sound insulation layer 33 and the fourth polyurethane foam sound insulation layer 34 is not less than the apparent density of the first polyurethane foam sound insulation layer 31. For example, the apparent density of the third polyurethane foam sound insulation layer 33 and the fourth polyurethane foam sound insulation layer 34 is 60-280 kg / m³. 3 The reason why the first polyurethane foam sound insulation layer 31 is a low-density sound insulation and sound absorption material is that by keeping the surface soft, it increases the adhesion to the floor iron plate of a general car, thereby preventing the material from splashing when vibration occurs, and suppressing noise leakage at the same time. The reason why the second polyurethane foam sound insulation layer 32 is made of a higher-density sound insulation and sound absorption material than the first polyurethane foam sound insulation layer 31 is that the noise from the low-density material of the first polyurethane foam sound insulation layer 31 is reflected and refracted when it passes through the high-density material of the second polyurethane foam sound insulation layer 32, thereby inducing the sound to disappear.

[0026] By using four layers of polyurethane foam sound insulation layers with different apparent densities to form the main body of the sound-insulating car carpet 100, the noise transmission path is complicated, thereby maximizing the sound absorption and sound insulation performance. At the same time, since the sound-insulating car carpet 100 is made of polyurethane foam sound insulation layers with different apparent densities and does not include high-density heavy sound insulation layers, the weight of the sound-insulating car carpet 100 can be kept at a relatively light level, making it easy for users to move and clean it later.

[0027] See attached document Figure 1 To be continued Figure 4 As shown, in this embodiment, the sound-insulating car carpet 100 also includes a PET absorbent cotton layer 10, which is adhered to the outer surface of the fourth polyurethane foam sound insulation layer 34. Placing the PET absorbent cotton layer 10 on the outer surface of the sound-insulating car carpet 100 allows its aesthetically pleasing surface to be used directly as decoration, improving the overall appearance of the sound-insulating car carpet 100. Simultaneously, the PET absorbent cotton layer 10 has the best absorption effect for mid-to-high frequencies, meaning it has a good absorption effect for human voices and harsh noises.

[0028] See attached document Figure 1 To be continued Figure 5 As shown, in this embodiment, the soundproof car carpet 100 also includes a massage layer 20, which is disposed between the PET absorbent cotton layer 10 and the fourth polyurethane foam soundproof layer 34. Multiple interconnected airbags are disposed inside the massage layer 20, and the airbags are connected to an external air pump 23, which is used to control the inflation or deflation of the airbags.

[0029] When resting, users can remove their shoes and place their feet on the soundproof car carpet 100. Turning on the air pump 23 inflates or deflates the airbags inside the massage layer 20, squeezing the user's soles to achieve a foot massage effect. It should be noted that the structural principle of massaging the user's feet using the air pump 23 and airbags can be directly applied to the existing massage structure of car massagers, namely, the system of air pump 23 + airbags + solenoid valve assembly + delivery pipeline. Therefore, the structural principle of airbag massage will not be repeated here.

[0030] See attached document Figure 5As shown, the massage layer 20 includes an upper massage layer 21 and a lower massage layer 22. Multiple mounting slots 24 for installing airbags are evenly provided at the mating end faces of the upper massage layer 21 and the lower massage layer 22. Connecting channels 25 are provided between the multiple mounting slots 24, and these channels are used to install connecting tubes that connect the multiple airbags. By adopting an openable massage layer structure, the installation of airbags in the massage layer is facilitated. That is, after the airbag is placed on one side (for example, first on the upper massage layer 21), the other side (for example, the lower massage layer 22) is then snapped shut. After snapping shut, adhesive is used to seal and bond the upper massage layer 21 and the lower massage layer 22 around their perimeter, thus completing the installation of the airbag inside the massage layer. Furthermore, the massage layer is made of a highly resilient sponge material.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A sound-insulating car carpet, characterized in that, It includes a first polyurethane foam sound insulation layer, a second polyurethane foam sound insulation layer, a third polyurethane foam sound insulation layer, and a fourth polyurethane foam sound insulation layer bonded together from bottom to top. The apparent density of the first polyurethane foam sound insulation layer is less than that of the second polyurethane foam sound insulation layer, and the apparent densities of the third and fourth polyurethane foam sound insulation layers are not less than that of the first polyurethane foam sound insulation layer.

2. The sound-insulating car carpet according to claim 1, characterized in that, The apparent density of the first polyurethane foam sound insulation layer is 60–140 kg / m³. 3 The apparent density of the second polyurethane foam sound insulation layer is 160–280 kg / m³. 3 .

3. The sound-insulating car carpet according to claim 2, characterized in that, The apparent density of the third and fourth polyurethane foam sound insulation layers is 60–280 kg / m³. 3 .

4. The sound-insulating car carpet according to claim 1, characterized in that, It also includes a PET absorbent layer, which is adhered to the outer surface of the fourth polyurethane foam sound insulation layer.

5. A sound-insulating car carpet according to claim 4, characterized in that, It also includes a massage layer, which is disposed between the PET absorbent cotton layer and the fourth polyurethane foam sound insulation layer. Multiple interconnected airbags are disposed inside the massage layer, and the airbags are connected to an external air pump, which is used to control the inflation or deflation of the airbags.

6. The sound-insulating car carpet according to claim 5, characterized in that, The massage layer includes an upper massage layer and a lower massage layer. Multiple mounting slots for mounting the airbags are evenly provided at the end faces of the upper and lower massage layers that are in contact with each other. A connecting channel is provided between the multiple mounting slots, and the connecting channel is used to install a connecting tube that connects the multiple airbags.

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