CN104960446A - Honeycomb foam structure seat - Google Patents

Abstract

The invention discloses a seat with a honeycomb foam structure. Seat cushions and seats filled in the seat back are foamed into a honeycomb foam structure. The hexagonal columns hang parallel to each other in space; the honeycomb foam structure filled in the seat cushion includes the first foam structure of the seat cushion and the second foam structure of the seat cushion, and the foam density of the first foam structure of the seat cushion is greater than that of the second cushion foam structure. The foam density of the foam structure; the honeycomb foam structure filled in the seat back includes the first foam structure of the backrest, the second foam structure of the backrest and the third foam structure of the backrest, and the foaming structure of the third foam structure of the backrest The density is greater than the foaming density of the first foaming structure of the backrest, and the foaming density of the first foaming structure of the backrest is greater than the foaming density of the second foaming structure of the backrest. The invention considers the distribution characteristics of the occupant's body pressure, fully exerts the deformation characteristics of the foaming material and can enhance the foaming air permeability.

Description

A honeycomb foam structure seat

technical field

The invention relates to a car seat, in particular to a seat with a honeycomb foam structure.

Background technique

With the continuous development of automobile technology, people pay more attention to the comfort of car seats. Seats, as the parts in the car that are in direct contact with the occupants, directly affect the comfort of the occupants. The degree is the most important factor in determining whether the seat is comfortable. In the past seat foam design, there are the following three problems:

(1) The foam density of the seat is the same, too much support for some body parts of the occupant, insufficient support for some body parts of the occupant, and different support forces cannot be provided for different body parts of the occupant. Since the foam of the seat is a whole, after the foam is squeezed and deformed, the deformation space of the foam is limited, and the foam cannot fully deform to adapt to the body contour of the occupant, and the occupant will feel a hard object when riding for a long time.

(2) The air permeability of the foam is not good. The overall design of the foam will cause the air in the seat cushion to not circulate, and the heat of the buttocks of the occupants will accumulate on the seat cushion and cannot be discharged, which will not only greatly reduce the comfort quality of the seat, Long-term rides may also cause various diseases.

(3) The foam density of the seat is the same everywhere, but the stress distribution of the occupant on the seat is uneven. The stress concentration area of the seat and the ordinary contact area require different bearing capacity. The requirements for softness and hardness are also different. If the seat is used for a long time, some body parts of the occupant will experience muscle fatigue due to excessive foaming or insufficient foam support, and the seat will wear out in the stress concentration area where the occupant and the seat are in contact. If it is large, it will directly affect the appearance of the seat and reduce the normal service life of the whole chair.

At present, the car seat foam in the market is mainly produced from polyurethane. The foam density is an important physical property index of the car seat. Ride comfort and the driving experience of the whole vehicle. When the foam density of the car seat decreases, the tensile strength of the car seat foam decreases, the elongation decreases, the compression set increases, and the durability deteriorates. The comfort of the car seat foam decreases with the density And the thickness becomes thinner and worse. Therefore, it is necessary to increase the foam density at the high-strength extrusion of the seat.

Contents of the invention

The purpose of this invention patent is to design a honeycomb foam structure seat that considers the distribution characteristics of the occupant's body pressure, fully utilizes the deformation characteristics of the foam material, and can enhance the air permeability of the foam, so as to meet the air permeability requirements of the occupant.

The patent of the present invention adopts the following technical solutions, combined with the accompanying drawings:

A seat with a honeycomb foam structure, comprising a seat cushion 15 and a seat back 14, the seat cushion and the backrest are filled with seat foam, and the seat cushion 15 and the seat back 14 are filled with seat foam The foam is a honeycomb foam structure, and the honeycomb foam structure is composed of a plurality of hollow hexagonal columnar bodies, each hexagonal columnar body is suspended parallel to each other in space.

Said seat with a honeycomb foam structure, wherein the honeycomb foam structure filled in the seat cushion 15 includes a cushion first foam structure 6 and a cushion second foam structure 7, and the seat cushion first foam structure The foam structure 6 is arranged on the left half hip region 2 and the right half hip region 1 of the seat cushion 15, and the second foam structure 7 of the seat cushion is arranged on the left thigh region 5, the right thigh region 3 and the middle of the thigh of the seat cushion 15 In area 4, the foam density of the first foam structure 6 of the seat cushion is greater than the foam density of the second foam structure 7 of the seat cushion.

In the seat with a honeycomb foam structure, the foam density of the first foam structure 6 of the seat cushion is 1.5 to 2.5 times the foam density of the second foam structure 7 of the seat cushion.

Said seat with a honeycomb foam structure, wherein the honeycomb foam structure filled in the seat back 14 includes a first foam structure 16 of the backrest, a second foam structure 17 of the backrest and a third foam structure of the backrest , the backrest first foam structure 16 is arranged on the left shoulder region 9 and the right shoulder region 8 of the seat back 14, and the backrest second foam structure is arranged on the left side region 11 and the right side of the seat back 14 Area 10, the third foam structure of the backrest is arranged on the waist region 13 of the seat back 14, the foaming density of the third foaming structure of the backrest is greater than the foaming density of the first foaming structure 16 of the backrest, the first foaming structure of the backrest The foam density of the foam structure 16 is greater than the foam density of the second foam structure 17 of the backrest.

Compared with the existing seat foam design, the honeycomb foam seat provided by this patent has the following advantages:

(1) The seat foam adopts a honeycomb structure, which has the characteristics of a firm structure, and the deformation space of the honeycomb structure foam in the direction vertical to the seat surface is large, and even heavy passengers will not be deformed by the foam Insufficient to produce a hard object feeling, the foam surface can better fit the contour curve of the occupant. When the occupant sits on the seat, the weight of the occupant is distributed on the foamed hexagonal column, and the force direction of the foam is perpendicular to the foam surface and parallel to the hexagonal column in space. Under the action of longitudinal force, the foamed material deforms along the direction of the force, that is, it deforms in the height direction of the hexagonal columnar body, and the foaming deforms along the compression characteristic curve of the material. The hollow hexagonal columnar body provides enough for the longitudinal deformation of the foaming According to the weight of the occupant, the foamed hexagonal columnar body can be deformed to a large extent.

(2) The seat cushion and the backrest of the honeycomb foam structure are divided into different areas, each area has different foam density, different support force for the occupant, and different degrees of softness and hardness of the seat. Seat cushion foaming is divided into five areas according to the principle of optimal body pressure distribution of the human body, namely the left half hip area, right half hip area, left thigh area, right thigh area, and middle thigh area. Seat back foam is divided into six areas according to the principle of optimal body pressure distribution of the human body, namely the left shoulder area, right shoulder area, back area, waist area, left side area, and right side area. The foaming densities of the seat cushion and the backrest are set differently according to the body pressure distribution of the human body on the seat, so different supporting forces can be provided for different body parts of the occupant. In the stress concentration area of the seat, that is, the left and right hip areas of the seat cushion and the back area of the backrest, the density of the hexagonal columns of the honeycomb foam structure increases, that is, the number of hexagons on the foam surface increases. The stress concentration of the seat cushion is mainly distributed at the ischium joints of the left and right hips of the occupant, and the stress concentration of the seat back is mainly distributed on the occupant's back. In the previous seat design, the foams were all of the same density, and the foam in the stress-concentrated area of the seat could not provide enough support. The occupant sat for a long time, and the foam material would be permanently deformed, and the foam in the stress-concentrated area of the seat was less prone to wear and tear. Large, it will affect the appearance of the seat and the service life of the whole chair.

(3) The center of the hexagonal columnar body of the honeycomb foam structure is hollowed out, and the heat accumulated by the occupant on the surface of the seat can be discharged through the hollow structure, which improves the air permeability of the foamed seat and can bring great benefits to the occupant. Good thermal comfort experience. In the previous foam design, the foam is an integral design with poor air permeability, the heat from the occupant's buttocks and back cannot be discharged, and the thermal comfort of the seat is poor.

Description of drawings

Fig. 1 is the structure schematic diagram of honeycomb foam structure seat of the present invention;

Fig. 2 is the top view of the honeycomb foam structure seat of the present invention;

Fig. 3 is the side view of the seat of honeycomb foam structure of the present invention;

Fig. 4 is a body pressure distribution diagram of an occupant on the seat back;

Fig. 5 is a body pressure distribution diagram of the occupant on the seat cushion;

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

Accompanying drawing 1 has shown the structural representation of this honeycomb foam structure seat, and honeycomb foam structure seat comprises seat cushion 15 and seat back 14, and seat foam is filled in seat cushion and backrest, and seat cushion and backrest The seat foam filled inside is a honeycomb foam structure, which is similar in shape to a honeycomb. The honeycomb foam structure is composed of a number of hollow hexagonal columns. Each hexagonal columnar body is suspended parallel to each other in space, perpendicular to the seat The seat surface that comes into contact with the occupant.

The honeycomb foam structure specifically includes foam structures of different densities. By increasing the number of hexagonal columns in the pressure-concentrated area of the seat cushion foam, the foam density can be increased, that is, when the pressure between the occupant and the seat is relatively high. Large areas increase the density of the foamed hexagonal columns. Assuming that the side length of the hexagon on the foam surface of the seat cushion is D, then when the side length of the hexagon at the left and right hips is D/2, the number of hexagonal columns increases by 4 times, and the theoretical foam density Also increased by 4 times, the tensile strength of the cushion foam increases, the compression set decreases, and the durability is significantly improved. Similarly, the number of hexagonal columns can be increased at the back and shoulders where the occupant contacts the seat back.

The seat cushion 15 and the seat back 14 respectively have regions with different foam densities. The seat cushion 15 is divided into five regions according to the optimal body pressure distribution principle (shown in accompanying drawing 4) of the occupant on the seat back, being respectively the left half-buttocks region 2, the right half-buttocks region 1, the left thigh region 5, Right thigh area 3, middle thigh area 4. The seat back 14 is divided into six regions according to the optimal body pressure distribution principle (shown in accompanying drawing 5) of the occupant on the seat cushion, being respectively the left shoulder region 9, the right shoulder region 8, the back region 12, the waist region 13, Left side area 11 , right side area 10 .

Referring to Fig. 1 and Fig. 2, the honeycomb foam structure filled in the seat cushion 15 includes the first foam structure 6 and the second foam structure 7 of the seat cushion with different densities. As shown in Fig. 1, the first foam structure of the seat cushion The area where the structure 6 is located is the stress concentration area of the occupant on the seat cushion, that is, the left and right hip areas 2 and 1. The stress concentration point of the occupant's hip bone node falls in this area, and the foaming density of the first foam structure 6 of the seat cushion is The second foam structure 7 is 1.5 to 2.5 times the foaming density, which can provide sufficient supporting force for the occupant, slow down the fatigue of the occupant due to insufficient buttock supporting force, and reduce the wear and tear of the stress concentration area of the seat cushion. The area where the second foaming structure 7 of the seat cushion is located is the left thigh area 5, the right thigh area 3 and the middle area of the thigh 4 of the seat cushion 15, and the density of the second foaming structure 7 of the seat cushion is relatively small, which can provide enough space for the thighs of the occupant. For soft support, the supporting force required by the occupant's thighs is less than that required by the occupant's buttocks, so the foaming density of the second foam structure 7 of the seat cushion should be smaller than that of the first foam structure 6 of the seat cushion. The foam honeycomb structure of the seat cushion is designed as a hollow hexagonal column in the middle, which can discharge the heat accumulated on the occupant's buttocks and thighs, so that the seat cushion has good thermal comfort.

Accompanying drawing 2 has shown the top view of this honeycomb foam structure seat, and the honeycomb foam density of seat cushion left and right half buttock area is greater than the foam density of left and right thigh area, and the foaming surface of seat cushion left and right half buttock area is hexagonal The number of columns is more than that of the left and right thighs. The body pressure distribution of the occupant on the surface of the seat cushion is concentrated at the occupant's ischial node, the stress on the surface of the seat cushion decreases from the ischial node to the surrounding, and the stress distribution of the occupant's thigh on the seat cushion is relatively uniform, and the stress is less than The left and right hips of the occupant. It is thus provided that the density of the first foam structure 6 of the seat cushion in the region of the left and right buttocks is greater than the density of the second foam structure 7 of the seat cushion in the region of the left and right thighs.

Referring to Fig. 1 and Fig. 3, the honeycomb foam structure on the seat back 14 is in the same principle as the honeycomb foam structure on the seat cushion 15, and the honeycomb foam structure filled in the seat back 14 includes honeycomb backrests of different densities. The first foam structure 16, the second foam structure 17 of the backrest and the third foam structure of the backrest (not shown in the figure). The first foam structure 16 of the backrest is arranged on the left shoulder region 9 and the right shoulder region 8 of the seat back 14, and the second foam structure of the backrest is arranged on the left side region 11 and the right side region of the seat back 14 10. The third foam structure of the backrest is arranged on the waist region 13 of the seat back 14 . The stress of the left and right shoulder regions 9, 8 of the seat back 14 is greater than that of the left and right side regions 11, 10 of the seat back, so the density of the backrest first foam structure 16 in the left and right shoulder regions on the backrest is greater than that of the left and right side regions. The density of the honeycomb backrest second foaming structure 17 and the foaming density of the backrest first foaming structure 16 are 1.5 to 2.5 times that of the backrest second foaming structure 17 . And the density of the foaming structure at the stress concentration place (that is, the fourth and fifth vertebrae of the human body) of the seat back 14 is relatively large, and the foaming density of the third foaming structure in the waist region 12 is greater than that of the left and right shoulder regions 9, 8 and the foam density of the first foam structure 16 of the backrest in the left and right side areas 11, 10, because the stress of the occupant on the seat is concentrated in the waist area 12, followed by the occupant's left and right shoulder areas 9, 8, and again The occupant's lumbar region 13, left and right side regions 11, 10 are under minimal stress. Therefore, the foaming density of the third foaming structure of the backrest is greater than that of the first foaming structure 16 of the backrest, and the foaming density of the third foaming structure of the backrest is 1.5 to 2.5 times that of the first foaming structure 16 of the backrest. Generally speaking, the foam densities of the third foam structure of the backrest, the first foam structure of the backrest, and the second foam structure of the backrest decrease successively. Depending on the foam density of the backrest, it can provide different support forces required by different body parts of the occupant, so that each part of the occupant's body is in the most comfortable support state. Reduce the occupant's muscle soreness caused by the insufficient support of the seat to the body, or the hard object feeling caused by the excessive support of the seat to the body.

Accompanying drawing 4 shows the body pressure distribution diagram of the occupant on the back of the seat. It can be seen from the figure that the occupant's waist area has the largest stress, and the stress spreads from the waist to the surroundings. At the same time, the pressure on the shoulder area is relatively large. This distribution law sets the different areas of the seat back of the honeycomb foam structure.

Attached Figure 5 shows the body pressure distribution diagram of the occupant on the seat cushion. It can be seen from the figure that the stress in the left and right buttocks of the occupant is the largest, and the stress spreads from the occupant's ischial node to the surroundings, and the pressure on the front of the occupant's thigh is relatively high. Small, so that different areas of the honeycomb foam structure seat cushion are set according to the distribution law.

Claims (4)

1. a cell type foaming structure seat, comprise Chain cushion (15) and back of seat (14), seat foaming is all filled with in cushion and backrest, it is characterized in that, described Chain cushion (15) and the interior seat foaming of filling of back of seat (14) are cell type foaming structure, described cell type foaming structure is arranged by multiple hollow out hexagonal column and forms, and each hexagonal column is parallel to each other in space suspension.

2. a kind of cell type foaming structure seat as claimed in claim 1, it is characterized in that, the cell type foaming structure of filling in described Chain cushion (15) comprises cushion first foaming structure (6) and cushion second foaming structure (7), described cushion first foaming structure (6) is arranged on the stern region, a left side half (2) of Chain cushion (15) and right half stern region (1), described cushion second foaming structure (7) is arranged on the left thigh region (5) of Chain cushion (15), right thigh region (3) and thigh zone line (4), the expansion density of described cushion first foaming structure (6) is greater than the expansion density of cushion second foaming structure (7).

3. a kind of cell type foaming structure seat as claimed in claim 2, is characterized in that, the expansion density of described cushion first foaming structure (6) is 1.5 ~ 2.5 times of cushion second foaming structure (7) expansion density.

4. a kind of cell type foaming structure seat as claimed in claim 1, it is characterized in that, the cell type foaming structure of filling in described back of seat (14) comprises backrest first foaming structure (16), backrest second foaming structure (17) and backrest the 3rd foaming structure, described backrest first foaming structure (16) is arranged on left shoulder regions (9) and the right shoulder regions (8) of back of seat (14), described backrest second foaming structure is arranged on left side side region (11) and the right side region (10) of back of seat (14), described backrest the 3rd foaming structure is arranged on the lumbar region (13) of back of seat (14), the expansion density of described backrest the 3rd foaming structure is greater than the expansion density of backrest first foaming structure (16), the expansion density of backrest first foaming structure (16) is greater than the expansion density of backrest second foaming structure (17).