JP7075330B2 - Back pad - Google Patents

Description

The present invention relates to a back pad in which a headrest is arranged.

A seat back in which a headrest is arranged on a back pad supported by a frame is known. The back pad disclosed in Patent Document 1 is generated by providing a convex portion protruding toward the frame side on a backing material attached to the back surface of the pad and bringing the convex portion into contact with the frame so that the back pad rubs against the frame. Suppress abnormal noise.

Japanese Unexamined Patent Publication No. 2013-107458

However, the above-mentioned conventional technique has a problem that the back pad that is greatly deformed to the rear cannot suppress the abnormal noise generated by rubbing against the headrest stay.

The present invention has been made to solve this problem, and an object of the present invention is to provide a back pad capable of suppressing an abnormal noise generated by rubbing against a headrest stay.

In order to achieve this object, the present invention is a back pad in which a headrest stay is arranged on the back surface of the pad, and a backing material attached to the back surface of the pad and a non-metal net bonded to the backing material. And. The net is placed between the back of the pad and the headrest stay, and the length of the mesh in the direction perpendicular to the headrest stay is shorter than the thickness of the headrest stay.

According to the back pad according to claim 1, the non-metal net arranged between the headrest stay and the back surface of the pad is joined to the backing material attached to the back surface of the pad. The length of the mesh in the direction perpendicular to the headrest stay is shorter than the thickness of the headrest stay, so if the pad deforms toward the headrest stay, the mesh will become the headrest stay before the pad or backing material touches the headrest stay. Contact. As a result, it is possible to suppress the generation of abnormal noise caused by the contact between the pad or the backing material and the headrest stay.

According to the back pad according to claim 2, at least a part of the lines constituting the net is arranged diagonally with respect to the headrest stay. As a result, the net tends to extend in the direction perpendicular to the headrest stay. Therefore, when the pad is deformed toward the headrest stay, the net extends as the pad extends, and the movement of the pad toward the headrest stay can be suppressed. Therefore, in addition to the effect of claim 1, it is possible to further suppress the generation of abnormal noise caused by contact with the headrest stay.

According to the back pad according to claim 3, at least a portion of the upper edge portion of the net where the headrest stay intersects is joined to the backing material by the first joint portion. This prevents the headrest stay from being inserted between the pad and the net, and the net can be arranged between the pad and the headrest stay. Further, since at least a portion of the net other than the first joint portion is not joined to the backing material, the net can be easily stretched. As a result, when the pad is deformed toward the headrest stay, the net is stretched and the movement of the pad toward the headrest stay can be suppressed. Therefore, in addition to the effects of claim 1 or 2, it is possible to further suppress the generation of abnormal noise caused by contact with the headrest stay.

According to the back pad according to claim 4, since the entire net is arranged on the backing material so as to be overlapped with each other, it is possible to prevent the pad from invading the net when the pad is deformed toward the headrest stay. As a result, the net can be brought into contact with the headrest stay before the pad comes into contact with the headrest stay. Therefore, in addition to the effect according to any one of claims 1 to 3, abnormal noise caused by the contact between the pad and the headrest stay is caused. Can be suppressed.

It is a perspective view of the vehicle seat provided with the back pad in 1st Embodiment. It is a perspective view of a frame. It is a rear view of a back pad. It is sectional drawing of the back pad in the IV-IV line of FIG. It is sectional drawing of the back pad in the VV line of FIG. (A) is a rear view of the back pad showing the portion shown by VIa in FIG. 3, (b) is a rear view of the back pad in the second embodiment, and (c) is a rear view of the back pad in the third embodiment. It is the back view of the back pad, and (d) is the back view of the back pad in 4th Embodiment. (A) is a rear view of the back pad in the fifth embodiment, (b) is a rear view of the back pad in the sixth embodiment, and (c) is the back surface of the back pad in the seventh embodiment. It is a figure, (d) is the back view of the back pad in 8th Embodiment. (A) is a rear view of the back pad in the ninth embodiment, and (b) is a rear view of the back pad in the tenth embodiment. It is a schematic side view of a test apparatus.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a vehicle seat 10 provided with a back pad 30 (described later) according to the first embodiment of the present invention. The vehicle seat 10 is a seat mounted on an automobile, and includes a seat cushion 11 that supports the buttocks of the occupant, a seat back 12 that serves as a backrest of the occupant, and a headrest 13 that supports the head of the occupant.

FIG. 2 is a perspective view of the frame 14 constituting a part of the vehicle seat 10. The frame 14 includes a cushion frame 15 that is a part of the seat cushion 11, and a back frame 16 that supports the headrest 13 and the back pad 30. The back frame 16 is joined between a pair of left and right horizontal frames 17 made of vertically long steel plates, an upper frame 18 made of a U-shaped steel pipe spanned over the upper end of the horizontal frame 17, and a lower portion of the horizontal frame 17. It is provided with a lower frame 19 made of a horizontally long steel pipe. A back plate 20 made of a steel plate is bridged and joined to the horizontal frame 17 near the lower frame 19. The back frame 16 is integrated in a square frame shape by a horizontal frame 17, an upper frame 18, a lower frame 19, and a back plate 20.

In the back frame 16, pressure receiving members 21 and 22 are bridged between the horizontal frames 17. In this embodiment, the pressure receiving members 21 and 22 are three S-shaped steel springs. The pressure receiving member 21 is arranged at a position lower than half the height of the back frame 16, and the pressure receiving member 22 is arranged at a position higher than half the height of the back frame 16. The pressure receiving member 21 is a spring that supports the lower part of the back of the occupant. The pressure receiving member 22 is a spring that supports the upper part of the back of the occupant.

Holders 23 are fixed to the upper frame 18 at two locations on the left and right in the center by welding. The holder 23 is a member into which the headrest stay 24 protruding from the headrest 13 is inserted. The headrest stay 24 is a pipe or rod made of metal or synthetic resin.

3 is a rear view of the back pad 30, FIG. 4 is a cross-sectional view of the back pad 30 in line IV-IV of FIG. 3, and FIG. 5 is a cross-sectional view of the back pad 30 in line V-V of FIG. be. In FIGS. 3 and 4, the lower part of the back pad 30 is not shown. In FIGS. 3 to 5, other than the holder 23 and the headrest stay 24, the frame 14 that supports the back pad 30 is not shown.

As shown in FIG. 3, the back pad 30 includes a pad 31 supported by the back frame 16 (see FIG. 2), a backing material 35 attached to the back surface 32 (see FIG. 4) of the pad 31, and a backing material 35. The net 36, which is joined to the net 36, is provided. The pad 31 is a member made of a soft foam such as a flexible polyurethane foam, and the back surface 32 of the pad 31 is arranged toward the pressure receiving members 21 and 22 of the back frame 16. The pressure receiving members 21 and 22 elastically support the back pads 30 arranged on the front surfaces of the pressure receiving members 21 and 22, respectively. The surface 33 of the pad 31 is covered with a skin material (not shown).

The holder 23 is fixed to the upper part of the pad 31. Two headrest stays 24 protruding from the lower part of the headrest 13 are inserted into the holder 23. The holder 23 fixes the headrest stay 24 inserted into the holder 23 at an arbitrary position. As a result, the headrest 13 is fixed to the upper part of the pad 31. The lower part of the headrest stay 24 inserted into the holder 23 protrudes from the holder 23. The headrest stay 24 protruding from the holder 23 is arranged near the back surface 32 of the pad 31. The back surface 32 of the pad 31 is formed with a recess 34 (see FIG. 5) recessed from the back surface 32 toward the front surface 33 at a portion where the headrest stay 24 is arranged.

The lining material 35 is a planar member that reinforces the pad 31. As the lining material 35, for example, a woven fabric, a knitted fabric, a non-woven fabric, or a laminate thereof formed of natural fibers of animal or plant origin, fibers made of synthetic resin, or the like is used. Examples of the synthetic resin constituting the fiber include polyethylene terephthalate (PET), polyethylene, polyester, nylon, polyurethane, rayon and the like.

The net 36 is a non-metal member arranged between the pad 31 and the headrest stay 24. The basis weight (mass per unit area) of the net 36 is smaller than that of the backing material 35. The net 36 is joined to the backing material 35 by suturing, adhering, welding, etc. with threads, staples, tag pins, etc., leaving a seam allowance 36a (see FIG. 4) such as a seam allowance and a glue allowance. In the present embodiment, not only the stop allowance 36a but also the entire net 36 is arranged so as to overlap the backing material 35.

In the net 36, the portions where the first line 37 and the second line 38 intersect are connected to each other. The first line 37 and the second line 38 are formed of, for example, animal-based or plant-based natural fibers, synthetic resin wire rods, and the like. Examples of the synthetic resin constituting the first wire 37 and the second wire 38 include polyethylene terephthalate (PET), polyethylene, polyester, nylon, polyurethane, rayon and the like.

The mesh 36 has a rectangular mesh 39 surrounded by a first line 37 and a second line 38. The length L of the mesh 39 in the direction perpendicular to the headrest stay 24 (horizontal direction in FIG. 3) is shorter than the diameter (thickness in the rear view) of the headrest stay 24. In the rear view of the back pad 30, the net 36 has the first line 37 and the second line 38 arranged obliquely with respect to the headrest stay 24. In order to suppress contact between the pad 31 and the backing material 35 and the headrest stay 24, the diameter of the first wire 37 and the second wire 38 (thickness of the net 36) is preferably 0.27 mm or more.

FIG. 6A is a rear view of the back pad 30 showing the portion shown by VIa in FIG. In the rear view of the back pad 30, the net 36 is formed in a rectangular shape in which the upper edge portion 40 and the lower edge portion 41 are parallel to each other and the side edge portions 42 on both sides are parallel to each other in the rear view. The lower edge portion 41 of the net 36 is located below the position of the lower end portion of the headrest stay 24 when the headrest stay 24 protrudes the longest from the holder 23. The side edge portion 42 of the net 36 is located on the left and right outside of the two headrest stays 24.

The net 36 is joined to the backing material 35 by the first joint portion 43 and the second joint portion 44 formed by adhesion, stitching, or the like. The first joint 43 and the second joint 44 show a hardened adhesive or seam. The upper edge portion 40, the lower edge portion 41, and the side edge portion 42 are portions having a width that serves as a stopper from each end edge of the net 36 to the joint portion (hardened adhesive, seam, etc.).

The first joining portion 43 joins at least a portion of the upper edge portion 40 of the net 36 where the headrest stay 24 intersects with the backing material 35. The first joint portion 43 intersects the side edge portion 42, respectively, and is continuous along the upper edge portion 40 from one side edge portion 42 to the other side edge portion 42. The second joint portion 44 joins the lower edge portion 41 of the net 36 and a part of the side edge portions 42 on both sides to the backing material 35. The second joint portion 44 intersects the side edge portion 42, respectively, and is continuous along the lower edge portion 41 from one side edge portion 42 to the other side edge portion 42. The non-joint portion 45, which is a portion of the net 36 other than the first joint portion 43 and the second joint portion 44, is not joined to the backing material 35.

The back pad 30 is manufactured using, for example, a first mold in which the surface 33 is molded, a second mold that overlaps the first mold, and a molding mold (not shown) including a core. After arranging the backing material 35 to which the net 36 is joined in the core, the undiluted solution that is the raw material of the soft foam is injected into the first mold, and the first mold is sealed using the second mold in which the core is arranged. .. When the undiluted solution foams and fills the mold, the pad 31 made of soft foam is molded.

Since the entire net 36 is arranged so as to overlap the backing material 35, when the pad 31 made of a soft foam is formed in a molding die (not shown), the backing material 35 puts the pad 31 into the mesh 39. The pad 31 can be prevented from entering. After opening the second mold in which the core is arranged, the core is moved with respect to the second mold and demolded to obtain a back pad 30 in which the backing material 35 is attached to the back surface 32 of the pad 31.

In the back pad 30, a non-metal net 36 arranged between the back surface 32 of the pad 31 and the headrest stay 24 is joined to the backing material 35 attached to the back surface 32 of the pad 31. The headrest stay 24 is arranged at a distance from the back surface 32 (recessed portion 34) of the pad 31.

Since the length L of the mesh 39 in the direction perpendicular to the headrest stay 24 is shorter than the thickness of the headrest stay 24, when the occupant deposits the weight on the back pad 30, the pad 31 is greatly deformed toward the headrest stay 24. The net 36 comes into contact with the headrest stay 24 before the pad 31 and the backing material 35 come into contact with the headrest stay 24. Since the area of contact between the net 36 and the headrest stay 24 is smaller than the area of contact of the pad 31 and the backing material 35 with the headrest stay 24, abnormal noise is generated due to the contact between the back pad 30 and the headrest stay 24. Can be suppressed.

The first line 37 and the second line 38 constituting the net 36 are arranged obliquely with respect to the headrest stay 24. As a result, when the pad 31 is deformed toward the headrest stay 24, the distance between the upper edge portion 40 and the lower edge portion 41 of the net 36 and the distance between the side edge portions 42 tend to increase. As the pad 31 is deformed, the net 36 tends to extend up and down and left and right, so that the movement of the pad 31 toward the headrest stay 24 to the rear can be suppressed. Therefore, it is possible to further suppress the generation of abnormal noise caused by the contact between the back pad 30 and the headrest stay 24.

In the back pad 30, at least a portion of the upper edge portion 40 of the net 36 where the headrest stay intersects is joined to the backing material 35 by the first joining portion 43. This prevents the headrest stay 24 from being inserted between the pad 31 and the net 36 when the headrest stay 24 is arranged on the back surface of the back pad 30, and secures the net 36 between the pad 31 and the headrest stay 24. Can be placed in.

Further, a part of the lower edge portion 41 and the side edge portion 42 of the net 36 is joined to the backing material 35 by the second joint portion 44, and at least a portion of the net 36 other than the first joint portion 43 is joined by the non-joint portion 45. Since it is not joined to the backing material 35, it is possible to prevent the net 36 from being restrained by the non-joining portion 45 when the pad 31 is deformed toward the headrest stay 24. As a result, the rearward movement of the pad 31 toward the headrest stay 24 can be suppressed. Therefore, it is possible to further suppress the generation of abnormal noise caused by the contact between the back pad 30 and the headrest stay 24.

The first joint 43 is continuous along the upper edge 40 from one side edge 42 to the other side edge 42, and the second joint 44 is from one side edge 42 to the other side. Since it is continuous up to the edge portion 42 along the lower edge portion 41, the net 36 can be easily extended up and down. As a result, it becomes difficult to suppress the vertical extension of the pad 31, so that the effect of suppressing the backward movement of the pad 31 toward the headrest stay 24 can be ensured.

Since the entire net 36 is overlapped on the backing material 35, when the pad 31 is deformed toward the headrest stay 24, the backing material 35 is interposed between the pad 31 and the net 36 to form the net 36. The pad 31 can be prevented from entering. As a result, the net 36 can be reliably brought into contact with the headrest stay 24 before the pad 31 comes into contact with the headrest stay 24. Therefore, it is possible to suppress the generation of abnormal noise caused by the contact between the pad 31 and the headrest stay 24.

FIG. 6B is a rear view of the back pad 60 in the second embodiment. In FIG. 6 (b), a part of the back pad 60 in which the headrest stay 24 is arranged is shown (same from FIG. 6 (c) to FIG. 7 (d)). The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted.

The second joint portion 46 joins the lower edge portion 41 of the net 36 and a part of the side edge portions 42 on both sides to the backing material 35. The second joint portion 46 intersects the side edge portion 42, respectively, and there is a gap between a portion that intersects the side edge portion 42 and a portion that intersects the other side edge portion 42. As a result, the lower edge portion 41 of the net 36 can be more easily stretched. As a result, in addition to the same action and effect as in the first embodiment, the left and right extension of the lower edge portion 41 of the net 36 can improve the effect of suppressing the rearward movement of the pad 31 toward the headrest stay 24.

FIG. 6 (c) is a rear view of the back pad 61 in the third embodiment. The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted. The second joint portion 47 joins the lower edge portion 41 of the net 36 and a part of the side edge portions 42 on both sides to the backing material 35. The second joint portion 47 joins a portion of the net 36 between the side edge portions 42. As a result, the portion of the lower edge portion 41 of the net 36 that is closer to the side edge portion 42 can be more easily stretched. As a result, in addition to the same action and effect as in the first embodiment, the left and right extension of the lower edge portion 41 of the net 36 can improve the effect of suppressing the rearward movement of the pad 31 toward the headrest stay 24.

FIG. 6D is a rear view of the back pad 62 in the fourth embodiment. The same parts as those described in the first embodiment and the second embodiment are designated by the same reference numerals, and the following description will be omitted. The first joining portion 48 joins at least a portion of the upper edge portion 40 of the net 36 where the headrest stay 24 intersects with the backing material 35. The first joint portion 48 intersects the side edge portion 42, respectively, and there is a gap between a portion that intersects the side edge portion 42 and a portion that intersects the other side edge portion 42. As a result, in addition to the same action and effect as in the second embodiment, the effect of suppressing the rearward movement of the pad 31 toward the headrest stay 24 can be improved by the left and right extension of the upper edge portion 40 of the net 36.

FIG. 7A is a rear view of the back pad 63 according to the fifth embodiment. The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted. The second joint portion 49 joins the lower edge portion 41 of the net 36 and a part of the side edge portions 42 on both sides to the backing material 35. The second joint portion 49 intersects the lower edge portion 41 and is continuous along the side edge portion 42 from the lower edge portion 41 to the vicinity of the upper edge portion 40, respectively. As a result, the lower edge portion 41 of the net 36 can be more easily stretched. As a result, in addition to the same action and effect as in the first embodiment, the left and right extension of the lower edge portion 41 of the net 36 can improve the effect of suppressing the rearward movement of the pad 31 toward the headrest stay 24.

FIG. 7B is a rear view of the back pad 64 in the sixth embodiment. The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted. The second joint portion 50 joins the lower edge portion 41 of the net 36 and a part of the side edge portions 42 on both sides to the backing material 35. The second joint portion 50 intersects the lower edge portion 41, respectively. As a result, the lower edge portion 41 and the side edge portion 42 of the net 36 can be more easily stretched. As a result, in addition to the same action and effect as in the first embodiment, the effect of suppressing the backward movement of the pad 31 toward the headrest stay 24 can be improved by extending the net 36 up and down and left and right.

FIG. 7 (c) is a rear view of the back pad 65 in the seventh embodiment. The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted. The first joining portion 51 joins at least a portion of the upper edge portion 40 of the net 36 where the headrest stay 24 intersects with the backing material 35. The first joint portion 51 intersects the upper edge portion 40 and the lower edge portion 41, and is provided at the position of the headrest stay 24, respectively. The first joint portion 51 is continuous along the side edge portion 42 from the lower edge portion 41 to the upper edge portion 40. As a result, the lower edge portion 41 of the net 36 can be more easily stretched. As a result, in addition to the same action and effect as in the first embodiment, the left and right extension of the lower edge portion 41 of the net 36 can improve the effect of suppressing the rearward movement of the pad 31 toward the headrest stay 24.

FIG. 7D is a rear view of the back pad 66 in the eighth embodiment. The same parts as those described in the first embodiment and the seventh embodiment are designated by the same reference numerals, and the following description will be omitted. The back pad 66 omits the first joint portion 43 as compared with the back pad 65 in the seventh embodiment. As a result, the man-hours for forming the first joint portion 43 can be reduced in the manufacturing process of the back pad 66. Further, the upper edge portion 40 and the lower edge portion 41 of the net 36 can be more easily stretched. Therefore, in addition to the same action and effect as in the first embodiment, the effect of suppressing the rearward movement of the pad 31 toward the headrest stay 24 can be improved by the left and right extension of the upper edge portion 40 and the lower edge portion 41 of the net 36. ..

FIG. 8A is a rear view of the back pad 70 according to the ninth embodiment. The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted.

As shown in FIG. 8A, the back pad 70 has a net 71 bonded to the backing material 35. The net 71 is a non-metal member arranged between the pad 31 and the headrest stay 24. The net 71 is formed in a trapezoidal shape in which the upper edge portion 72 and the lower edge portion 73 are parallel to each other and the distance between the side edge portions 74 on both sides expands downward.

In the net 71, a portion where the first line 75 and the second line 76 intersect and a portion arranged side by side are connected to each other. The net 71 has a hexagonal mesh 77 surrounded by the first line 75 and the second line 76. The length L of the mesh 77 in the direction perpendicular to the headrest stay 24 (left-right direction in FIG. 8A) is shorter than the thickness of the headrest stay 24. In the rear view of the back pad 30, the net 71 has the first line 75 and the second line 76 arranged obliquely with respect to the headrest stay 24.

Since the first line 75 and the second line 76 constituting the net 71 are arranged diagonally with respect to the headrest stay 24, when the pad 31 is deformed toward the headrest stay 24, the upper edge portion 72 and the lower edge of the net 36 are formed. The distance between the portion 73 and the side edge portion 74 tends to be long. As the pad 31 is deformed, the net 71 tends to extend up and down and left and right, so that the movement of the pad 31 toward the headrest stay 24 to the rear can be suppressed. As a result, it is possible to easily suppress the generation of abnormal noise caused by contact with the headrest stay 24, as in the first embodiment.

FIG. 8B is a rear view of the back pad 80 according to the tenth embodiment. The same parts as those described in the first embodiment are designated by the same reference numerals, and the following description will be omitted. The back pad 80 has a net 81 bonded to the backing material 35. The net 81 is a non-metal member arranged between the pad 31 and the headrest stay 24. The net 81 is formed in a vertically long rectangular shape, and is arranged on each of the two headrest stays 24. Similarly to the first embodiment, the back pad 80 in the tenth embodiment can suppress the generation of abnormal noise caused by the contact with the headrest stay 24.

FIG. 9 is a schematic side view of the test apparatus 90 for confirming the presence or absence of abnormal noise generated by rubbing the pad 94 (test piece) and the headrest stay 93. The test apparatus 90 includes a substantially rectangular parallelepiped base 91 and a substantially rectangular parallelepiped support portion 92 on which two parallel headrest stays 93 project. The headrest stay 93 is made by galvanizing a pipe made of carbon steel. The surface of the headrest stay 93 is covered with a silicone film. The thickness (diameter) of the headrest stay 93 is 14 mm. The end portion of the headrest stay 93 is placed on the upper surface of the table 91.

The pad 94 is a flat plate made of flexible polyurethane foam having a thickness T of 50 mm. A backing material 94a integrally molded with the pad 94 is attached to the back surface of the pad 94. The lining material 94a is a spunbonded non-woven fabric having a thickness of 100 g / m ² . The pad 94 is placed on the table 91 with the back surface side leaning on the headrest stay 93.

The pressure plate 95 is a cylinder having a diameter D of 80 mm, and is arranged between the two headrest stays 93 via the pad 94. The horizontal distance W from the end of the table 91 to the center of the pressure plate 95 was set to 100 mm. After the pressure plate 95 is placed on the pad 94, the pressure plate 95 is pressed downward in the vertical direction at a speed of 10 mm / sec, and the pad 94 and the backing material 94a are formed until the pad 94 is deformed by 50 mm in the vertical direction. The magnitude of the abnormal noise generated by rubbing against the headrest stay 93 was measured.

網の線径および網目の大きさと異音との関係を表１に示す。表１のＮｏ１－１２は、ヘッドレストステー９３とパッド９４の裏打ち材９４ａとの間に、線径や網目の大きさが異なる種々の網（図示せず）を介在させた。網目の形状が長方形または正方形のポリプロピレン製の網を用いた。表１に示すａ，ｂは網目の辺の長さであり、Ｌはヘッドレストステー９３に垂直な方向の網目の長さである（図３参照）。Ｎｏ１は網目を構成する線をヘッドレストステー９３と垂直および平行に配置し、Ｎｏ２－１２は網目を構成する線をヘッドレストステー９３に対し斜めに配置した。

Table 1 shows the relationship between the wire diameter and mesh size of the mesh and the abnormal noise. In No. 1-12 of Table 1, various nets (not shown) having different wire diameters and mesh sizes were interposed between the headrest stay 93 and the backing material 94a of the pad 94. A polypropylene net having a rectangular or square mesh shape was used. A and b shown in Table 1 are the lengths of the sides of the mesh, and L is the length of the mesh in the direction perpendicular to the headrest stay 93 (see FIG. 3). In No. 1, the lines constituting the mesh were arranged vertically and parallel to the headrest stay 93, and in No. 2-12, the lines constituting the mesh were arranged diagonally with respect to the headrest stay 93.

In No. 13, the backing material 94a of the pad 94 was brought into direct contact with the headrest stay 93. Those having a smaller abnormal noise than the magnitude of the abnormal noise of No. 13 were evaluated as A or B. Among them, the one with particularly small abnormal noise was evaluated as A. The one in which the abnormal noise of the same magnitude as that of No. 13 was generated was evaluated as C.

Comparing No. 13 and No. 1-10, it was clarified that the abnormal noise generated by rubbing the headrest stay 93 can be suppressed by interposing a net between the pad 94 and the headrest stay 93. In Nos. 11 and 12, a mesh is interposed between the pad 94 and the headrest stay 93, but the length L of the mesh in the direction perpendicular to the headrest stay 93 is longer than the thickness (diameter) of the headrest stay 93. , The abnormal noise could not be suppressed by the net.

No. 2-10 in which the lines constituting the mesh were arranged diagonally with respect to the headrest stay 93 was able to reduce the abnormal noise as compared with No. 1 in which the lines constituting the mesh were arranged vertically and parallel to the headrest stay 93. It has been clarified that the effect of suppressing abnormal noise can be improved by arranging the lines constituting the mesh diagonally with respect to the headrest stay 93.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It is easy to guess. For example, the shape, size, material, mesh shape, etc. of the headrest stay 24 and the pad 31 are appropriately set.

In the embodiment, the case where the recess 34 is formed on the back surface 32 of the pad 31 has been described, but the present invention is not limited to this. Of course, it is possible to omit the recess 34 and flatten the portion of the back surface 32 of the pad 31 on which the nets 36, 71, 81 are arranged.

In the embodiment, the pad 31 made of a soft foam such as a flexible polyurethane foam has been described, but the present invention is not limited to this, and it is naturally possible to apply the pad 31 to a pad 31 made of another material. Examples of the pad 31 made of another material include those obtained by curing (bonding) fibers made of synthetic resin or the like with a binder such as urethane, those made of synthetic resin fibers that are melted by heat and welded to each other, and the like. ..

In the embodiment, the back pad of the front seat of the automobile has been described, but the present invention is not limited to this, and it is naturally possible to apply the back pad of the back seat. Further, the present invention is not limited to automobile seats, and can of course be applied to back pads used for seats placed in vehicles and houses other than automobiles.

In the embodiment, the case where the entire nets 36, 71, and 81 are arranged so as to overlap the backing material 35 has been described, but the present invention is not limited to this. Of the back surface 32 of the pad 31, it is naturally possible to arrange the backing material 35 except at least the portion where the headrest stay 24 and the nets 36, 71, 81 overlap in the rear view. In this case, the backing material 35 and the nets 36, 71, 81 overlap by the amount of the seam allowance, the glue allowance, and the like. When the pad 31 is deformed toward the headrest stay 24 as a result, the backing material 35 does not suppress the elongation of the pad 31, so that the rearward movement of the pad 31 toward the headrest stay 24 can be suppressed. Therefore, it is possible to improve the effect of suppressing the generation of abnormal noise caused by the contact between the headrest stay 24 and the back pad.

In the embodiment, the case where the nets 36, 71, 81 are interposed between the pad 31 and the headrest stay 24 has been described, but further, the nets 36, 71, 81 are interposed between the pad 31 and the upper frame 18. Is of course possible. In this case as well, it is possible to suppress the generation of abnormal noise generated by the back pad rubbing against the upper frame 18 as in the embodiment.

In each of the above embodiments, by adding a part or a plurality of parts of the configuration of another embodiment to the embodiment or exchanging with a part or a plurality of parts of the configuration of the embodiment, etc. , The embodiment may be modified and configured. For example, it is naturally possible to replace the net 36 described in the first to eighth embodiments with the net 71 described in the ninth embodiment or the net 81 described in the tenth embodiment. Further, it is naturally possible to provide the joint portions described in the first to eighth embodiments in the net 71 described in the ninth embodiment and the net 81 described in the tenth embodiment.

24 Headrest stay 30, 60, 61, 62, 63, 64, 65, 66, 70, 80 Back pad 31 Pad 35 Backing material 36, 71, 81 Net 37,75 Line 1 (line)
38,76 2nd line (line)
39,77 mesh 40,72 upper edge 41,73 lower edge 42,74 side edge 43,48,51 first joint 45 non-joint L mesh length

Claims (4)

A back pad in which the headrest stay is placed on the back of the pad.
The lining material attached to the back of the pad and
With a non-metal net, which is joined to the backing material,
The net is arranged between the headrest stay and the pad, and the length of the mesh in the direction perpendicular to the headrest stay is shorter than the thickness of the headrest stay. The back pad according to claim 1, wherein at least a part of the lines constituting the net is diagonally arranged with respect to the headrest stay. A first joint portion in which at least a portion of the upper edge portion of the net where the headrest stay intersects is joined to the backing material,
The back pad according to claim 1 or 2, further comprising a non-joining portion in which at least a portion of the net other than the first joining portion is non-bonded to the backing material. The back pad according to any one of claims 1 to 3, wherein the net is arranged so as to be entirely overlapped with the backing material.

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