Abnormal sound restraint structure of vehicle interior trim

Abstract

To restrain abnormal sound from being generated while making it possible to unite exterior appearance of a vehicle interior trim.SOLUTION: There is provided on a configuration portion of at least one of a first part 10 and a second part 20 a plurality of interference parts (first interference part 11) which pressurizes the other of the first part 10 and the second part 20 which are different from the one and at the same time there is reduced pressurization force which applies the other between interference parts (first concave part 41) adjoining in relative movement direction in comparison with the interference part (first interference part 11) by the plurality of interference parts (first interference part 11) being disposed at appropriate intervals in a relative movement directions of the first part 10 and the second part 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a structure for suppressing abnormal noises in vehicle interior parts.

Background Art

[0002] As an example of this type of vehicle interior part, a vehicle seat disclosed in Patent Document 1 can be cited. In this vehicle seat, the lower part of the seat back is connected to the rear part of the seat cushion so as to be able to be tilted forward and backward via a recliner. Further, the lower end of the seat back is pressed against the rear part of the seat cushion so that no gap is generated between them. In the above configuration, when the seat back tilts and reclines, the lower end side of the seat back moves back and forth while being pressed against the seat cushion.

[0003] Here, the seat cushion and the seat back each have a pad (pad material) forming its outer shape and a cover (skin material) covering this pad, and the appearance is constituted by this cover. In such a configuration, when the seat back tilts, consideration should be given so that rubbing noise (abnormal noise) due to friction between the covers does not occur at the contact portion with the seat cushion. Therefore, in the above-described technology, by arranging a cover made of a crosswise bamboo fabric at the lower end of the seat back, the seat back is brought into point contact with the seat cushion. Thus, by reducing the contact area between the seat cushion and the seat back, it becomes possible to prevent or reduce the generation of abnormal noise at these contact portions as much as possible.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the field of vehicle interior parts, from the viewpoint of ensuring the design quality, there is a demand to unify the appearance as much as possible. However, in the above-described vehicle seat, as the cover of the seat back, a horizontal twill fabric (a specific cover material) is used at the lower end portion, and leather or the like (another cover material) is used for the portion excluding the lower end portion. When such different cover materials are used in combination, the appearance is made to look similar by post-treatment or the like, but there is also a certain limit to this. And when trying to more surely ensure the unity of the appearance with the above-described configuration, the use of a cover material having a different appearance from the horizontal twill fabric may be hesitated, and there is a risk that the degree of freedom in material selection cannot be appropriately ensured. The present invention was devised in view of the above points, and the problem to be solved by the present invention is to suppress the generation of abnormal noise while enabling the unity of the appearance of vehicle interior parts.

Means for Solving the Problem

[0006] As a means for solving the above problem, the abnormal noise suppression structure of a vehicle interior part according to a first invention is a structure for suppressing the generation of abnormal noise when a first part provided on the vehicle interior part and a second part provided on the vehicle interior part or another member adjacent to the first part move relative to each other in a pressed state. In the first part, a skin material is arranged along an outer shape portion formed of an elastically deformable pad material, and in the second part, another skin material is arranged along an outer shape portion formed of another elastically deformable pad material. In this type of structure, it is desirable that the generation of abnormal noise can be suppressed while enabling the unity of the appearance of the vehicle interior part by unifying the materials of each skin material or the like.

[0007] Therefore, on at least one of the outer shape portions of the first part and the second part of the present invention, a plurality of interference portions are provided that press the other of the first part and the second part, which is different from the one. And by arranging the plurality of interference portions at appropriate intervals in the relative movement direction of the first part and the second part, the pressing force applied to the other is reduced compared to the interference portions between the interference portions adjacent in the relative movement direction. In the present invention, a plurality of interference portions are provided at appropriate intervals, that is, intermittently, on at least one of the outer shape portions of the first part and the second part. And by intermittently providing the plurality of interference portions in the relative movement direction and reducing the pressing force applied to the other between the adjacent interference portions, it becomes possible to suppress the generation of abnormal noise. And in the present invention, since the interference portions are formed on the outer shape portion (the shape itself) of each part, it is not necessary to use a specific cover material for each skin material that forms the appearance, and the appearance of the vehicle interior parts is easily unified.

[0008] The abnormal noise suppression structure of the vehicle interior part of the second invention is the abnormal noise suppression structure of the vehicle interior part of the first invention, wherein, as the interference portion, a convex portion protruding toward the other of the first part and the second part, which is different from the one, is provided on at least one of the outer shape portions of the first part and the second part, and a concave portion recessed so as to move away from the other is provided between the convex portions adjacent in the relative movement direction. In the present invention, by providing a concave portion recessed so as to move away from the other between the adjacent convex portions (forming a concavo-convex structure), the pressing force applied to the other can be more reliably reduced.

[0009] The abnormal noise suppression structure of the vehicle interior part of the third invention is the abnormal noise suppression structure of the vehicle interior part of the second invention, wherein convex portions and concave portions are formed on both the first part and the second part, and when the first part and the second part move relatively, they are alternately displaced into the following (1) first state and (2) second state. That is, (1) in the first state, the convex portion of the first part and the convex portion of the second part are pressed against each other, and the concave portion of the first part and the concave portion of the second part are spaced apart while facing each other. Also, (2) in the second state, the convex portion of the first part is fitted into the concave portion of the second part, and the convex portion of the second part is fitted into the concave portion of the first part.

[0010] In the above-described first state, for example, when the first part is one side, the convex part (interference part) on that one side presses the convex part of the second part (the other side), but the concave part of the first part (one side) provided between adjacent convex parts and the concave part of the second part (the other side) are separated while facing each other. As a result, the pressing force applied to the second part (the other side) in the first state is reduced. The same applies when the second part is one side. And in the present invention, the first state is displaced to the second state by relative movement. In this second state, for example, when the first part is one side, the convex part on that one side is fitted into the concave part of the second part (the other side), so that the pressing force applied from this one convex part to the second part (the other side) is reduced compared to the first state. The same applies when the second part is one side. Thus, according to the above-described configuration, by making the first state appear intermittently during relative movement, the pressing force applied to the other side can be more reliably reduced.

[0011] The abnormal noise suppression structure of the vehicle interior trim of the fourth invention is the abnormal noise suppression structure of the vehicle interior trim of the first to third inventions, in which the pad material and the skin material are integrated, and another pad material and another skin material are integrated. In the present invention, by integrating each skin material with the corresponding pad material, the outer shape portions of the first part and the second part can be formed more appropriately.

Advantages of the Invention

[0012] According to the first invention of the present invention, it is possible to suppress the generation of abnormal noise while enabling the unification of the appearance of the vehicle interior trim. Further, according to the second invention, the generation of abnormal noise can be more reliably suppressed. Further, according to the third invention, the generation of abnormal noise can be more reliably suppressed. And according to the fourth invention, by arranging each skin material in a more appropriate state on each pad material, the generation of abnormal noise can be more reliably suppressed.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0014] Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. 1 to 16. In each figure, arrow lines indicating the front-rear direction, up-down direction, and left-right direction of the vehicle seat are appropriately illustrated. In each figure, for the sake of convenience, the illustration of the cushion cover and the back cover may be partially or entirely omitted. Also, in each figure, each convex portion (each concave portion) is assigned a corresponding reference sign, and for the other convex portions (each concave portion), the corresponding reference sign may be assigned in parentheses or the reference sign may be omitted. And the structure shown in FIGS. 2 and 3 may be simplified and illustrated in another figure (such as FIGS. 7 to 10 etc.) for the sake of convenience.

[0015] [Outline of the vehicle seat (an example of vehicle interior parts) of Example 1] First, the outline of the vehicle seat 2 shown in FIG. 1 will be described. In this vehicle seat 2, the lower part of the seat back 6 serving as the seat part is connected to the rear part of the seat back 6 so as to be tiltable via the recliner 8. Also, in the vehicle seat 2, the rear part (upper surface) of the seat cushion 4 and the lower end part of the adjacent seat back 6 are arranged in a state of being pressed against each other. Thereby, a gap is hardly generated between the seat back 6 and the seat cushion 4 (the portion indicated by the reference sign X in FIG. 1), and an excellent design of the seat can be ensured. Also, the seat back 6 is configured to tilt between the upright posture shown by the solid line in FIG. 1 and the reclined posture shown by the two-dot chain line in FIG. 1 by rotating back and forth around the central axis of the recliner 8. And when the seat back 6 tilts so as to recline, the rear part of the seat cushion 4 and the lower end part side (the lower end part and the portion on the rear side thereof) of the seat back 6 are pressed against each other and move relative to each other in the front-rear direction of the seat (see FIGS. 7 to 10).

[0016] [Pad material and skin material] Referring now to FIGS. 1 and 2, in the seat cushion 4, an outer shape portion is formed by an elastically deformable cushion pad 4P, and a cushion cover 4S is disposed along the outer shape portion of the cushion pad 4P. Also, in the seat back 6, an outer shape portion is formed by an elastically deformable back pad 6P, and a back cover 6S is disposed along the outer shape portion of the back pad 6P. The cushion pad 4P (back pad 6P) corresponds to a pad material (another pad material) and can be formed of an elastically stretchable material, such as a foamed resin like polyurethane foam. Also, the cushion cover 4S (back cover 6S) corresponds to a skin material (another skin material) and can be formed of a surface material capable of forming the appearance of the seat, such as a fabric (woven fabric, knitted fabric, non-woven fabric) or leather (natural leather, synthetic leather). Here, the cushion cover 4S and the back cover 6S may be formed of a single-piece surface material, or may be formed by joining a plurality of surface materials (skin pieces). In the vehicle seat 2, it is desired to make the appearance as uniform as possible, for example, by forming the entire cushion cover 4S of the same material or a similar material, and the same applies to the back cover 6S. Further, when aiming for a unified appearance, it is desirable to ensure the freedom of choice of the cover material, and a situation where the use of a specific cover material is indispensable should be avoided as much as possible.

[0017] [Noise suppression structure for vehicle interior parts] In the above-described configuration, the rear part of the seat cushion 4 shown in FIG. 1 and the lower end side of the seat back 6 are in a state of being pressed against each other and relatively move in the front-rear direction of the seat (see FIGS. 7 to 10). That is, in the vehicle seat 2, the rear part of the seat cushion 4 that forms a part thereof corresponds to the first part 10, and the lower end side of the seat back 6 that forms the other part corresponds to the second part 20. In this type of configuration, it is desirable to suppress as much as possible the generation of rubbing noise (abnormal noise) caused by the relative movement between the seat cushion 4 and the seat back 6. Further, in the vehicle seat 2, there is a demand to unify the appearances of the seat cushion 4 and the seat back 6 as much as possible, and in order to meet this demand, it is desirable to ensure the degree of freedom in selecting these cover materials. Therefore, in the present embodiment, by means of the configuration described later (each interference part 11, 21, etc. shown in FIG. 2), while enabling the unification of the appearance of the vehicle seat 2, the generation of abnormal noise is suppressed. Hereinafter, the configuration of the vehicle seat 2 will be described in detail in the order of the functions of the seat cushion 4, the seat back 6, and each interference part 11, 21 (each convex part 31, 32, each concave part 41, 42).

[0018] [Configuration of Seat Cushion] First, the rear part (first part 10) of the seat cushion 4 shown in FIG. 2 has a cushion pad 4P that forms its outer shape and a cushion cover 4S arranged along this cushion pad 4P. A plurality of first convex parts 31 as the first interference part 11 described later are formed at appropriate intervals, that is, intermittently, at the rear part of the cushion pad 4P, thereby forming an uneven structure.

[0019] [First Interference Part (First Convex Part)] A plurality of first convex portions 31 as the first interference portion 11 shown in FIG. 3 are formed on the outer shape portion of the rear portion (first portion 10) of the seat cushion 4 at appropriate intervals in the front-rear direction of the seat. Each of these first convex portions 31 is a portion that protrudes toward the seat back 6 side, and the protruding dimension 51 in the vertical direction thereof is set to be substantially the same. By adjusting the protruding dimension 51 of the first convex portion 31, the pressing force applied to the seat back 6 can be adjusted. For example, based on the conventional seat cushion shape S1 without an uneven structure (the shape indicated by the dashed line in FIG. 3), the top portions of the respective first convex portions 31 are provided so as to coincide with the conventional seat cushion shape S1. By doing so, each first convex portion 31 of the seat cushion 4 is pressed against the seat back 6 side (second convex portion 32 described later) with the same pressing force as in the conventional case. Note that the shapes of the respective first convex portions 31 may be unified or uneven, but in the present embodiment, the first convex portions 31 other than the front end and the rear end are unified to have a substantially trapezoidal cross section. And in the seat cushion 4, each first convex portion 31 is provided at a position where it is pressed against the lower end portion side of the seat back 6 until the seat back 6 changes from the upright posture to the reclined posture. Also referring to FIG. 4, in the rear portion of the seat cushion 4, the first convex portions 31 are continuously formed in the seat width direction, so that a configuration is provided in which a gap is hardly generated between the seat back over substantially the entire width of the seat.

[0020] [First concave portion] Also, in the rear portion (first portion 10) of the seat cushion 4 shown in FIG. 3, a plurality of first concave portions 41 are formed between adjacent first convex portions 31 on the lower side of the seat, that is, in a concave shape in a direction away from the seat back 6. As a result, an uneven structure is provided only by the first convex portions 31 and the first concave portions 41 on the outer shape portion of the rear portion of the seat cushion 4 (the relationship between the uneven structure and the cushion cover will be described later). And each first concave portion 41 has a substantially triangular shape in a side view, and is formed so as to notch the above-described conventional seat cushion shape S1 into a substantially triangle.

[0021] Also referring to FIGS. 5 and 6, in the seat cushion 4, a cushion cover 4S is disposed along the outer shape portion formed by the cushion pad 4P. Thereby, the outer shape portion at the rear of the seat cushion 4 is formed by the cushion pad 4P and the cushion cover 4S. That is, in this embodiment, an uneven structure, namely, a first convex portion 31 and a first concave portion 41, is formed by the cushion cover 4S and the cushion pad 4P. Here, the cushion cover 4S can be placed over the cushion pad 4P, or can be integrated with the cushion pad 4P by means such as integral molding or adhesion. For example, when covering the cushion cover 4S, it is desirable to pre-form unevenness at appropriate positions of the cushion cover 4S by means such as vacuum molding. Thereby, the cushion cover 4S can be placed along the outer shape portion of the cushion pad 4P without difficulty, and the outer shape portion of the first part 10 is formed by these. Also, by integral molding or adhesion, the cushion cover 4S is firmly integrated (fixed) with the cushion pad 4P, so that the outer shape portion of the first part 10 can be formed in a more appropriate state. At this time, according to integral molding, the cushion cover 4S can be placed along the cushion pad 4P without difficulty without going through processes such as vacuum molding and adhesion treatment.

[0022] [Configuration of Seat Back] Next, the lower end side (second part 20) of the seat back 6 shown in FIG. 2 has a back pad 6P forming its outer shape and a back cover 6S disposed along the back pad 6P. And a plurality of second convex portions 32 as second interference portions 21 to be described later are intermittently formed at the rear of the cushion pad 4P, thereby forming an uneven structure.

[0023] [Second Interference Portion (Second Convex Portion)] A plurality of second convex portions 32 as the second interference portion 21 shown in FIG. 3 are arranged at appropriate intervals (substantially equal intervals in FIG. 3) in the front-rear direction of the seat on the outer shape portion of the lower end side (second portion 20) of the seat back 6. Each of these second convex portions 32 is a portion that protrudes toward the seat cushion 4, and the protruding dimension 52 in the vertical direction thereof is set to be substantially the same. By adjusting the protruding dimension 52 of the second convex portion 32, the pressing force applied to the seat cushion 4 can be adjusted. For example, based on the conventional seat back shape S2 without an uneven structure (the shape shown by the two-dot chain line in FIG. 3), the top portions of the respective second convex portions 32 are provided so as to coincide with the conventional seat back shape S2. In this way, each second convex portion 32 of the seat back 6 is pressed against the seat cushion 4 side (first convex portion 31) with the same pressing force as in the conventional case. The plurality of second convex portions 32 are provided in a portion (lower end side) from the lower end portion to the lower rear side of the seat back 6 when the seat back 6 is in the upright posture. Here, the lower rear side of the seat back 6 is a portion that is pressed against the rear portion of the seat cushion 4 during backward tilting and in the backward tilted state. Also in the seat back 6, by continuously forming the second convex portions 32 over substantially the entire width in the seat width direction, a configuration is adopted in which a gap hardly occurs between the seat back 6 and the seat cushion 4. The shape of each second convex portion 32 is not particularly limited and may be unified or uneven, but in this embodiment, the second convex portions 32 other than the front end and the rear end are unified into a substantially trapezoidal cross section.

[0024] [Second concave portion] Also, on the lower end side (second portion 20) of the seat back 6 shown in FIG. 3, a plurality of second concave portions 42 are formed in a concave shape above the seat, that is, in a direction away from the seat cushion 4, between adjacent second convex portions 32. As a result, an uneven structure is provided only by the second convex portions 32 and the second concave portions 42 on the outer shape portion of the lower end side of the seat back 6 (the relationship between the uneven structure and the back cover will be described later). Each of the second concave portions 42 has a substantially triangular shape in a side view and is formed by notching the above-described conventional seat back shape S2 into a substantially triangular shape.

[0025] Also, in the seat back 6 shown in FIG. 5, a back cover 6S is arranged along the outer shape portion formed by the back pad 6P. As a result, the outer shape portion on the lower end side of the seat back 6 is formed by the back pad 6P and the back cover 6S. That is, in the present embodiment, an uneven structure, that is, a second convex portion 32 and a second concave portion 42, is formed by the back cover 6S and the back pad 6P. Here, the back cover 6S can also be placed over the back pad 6P or integrated with the back pad 6P. By firmly integrating the back cover 6S with the back pad 6P by integral molding or adhesion, the outer shape portion of the second part 20 can be formed in a more appropriate state. At this time, according to integral molding, the back cover 6S can be placed along the back pad 6P without difficulty without going through processes such as vacuum molding or adhesion treatment.

[0026] [Dimensions of each convex portion and each concave portion] As described later, the first convex portion 31 shown in FIG. 3 can be fitted into the second concave portion 42, and the second convex portion 32 can be fitted into the first concave portion 41. That is, the front-rear, left-right width dimension (reference signs omitted) of the first convex portion 31 (second convex portion 32) is smaller than the front-rear, left-right opening dimension (reference signs omitted) of the second concave portion 42 (first concave portion 41). The protruding dimension of each convex portion 31 (32) is not particularly limited as long as it can be fitted into the corresponding concave portion 41 (42). For example, the protruding dimension 51 of the first convex portion 31 is smaller than the depth dimension 53 of the second concave portion 42. On the other hand, the protruding dimension 52 of the second convex portion 32 is larger than the depth dimension 54 of the first concave portion 41. As a result, in a state where the second convex portion 32 is fitted into the first concave portion 41, the cushion cover 4S (back cover 6S) can be arranged in the upper and lower gaps generated therebetween in a well-fitting manner.

[0027] [Tilting operation of the seat back] In the vehicle seat 2 shown in FIG. 1, the rear part of the seat cushion 4 and the lower end side of the seat back 6 move relative to each other in the seat front-rear direction while being pressed against each other. In this type of configuration, as described above, while enabling the unification of the appearance of the cushion cover 4S (back cover 6S), it is desirable to suppress the generation of abnormal noises caused by the relative movement between the seat back 6 and the seat cushion 4 as much as possible. Therefore, on the outer shape portion of the rear part (first part 10) of the seat cushion 4 shown in FIGS. 2 and 3, a plurality of first interference parts 11 (first convex parts 31) that press the lower end side (second part 20) of the seat back 6 are provided. And by arranging the plurality of first interference parts 11 at appropriate intervals in the relative movement direction of the first part 10 and the second part 20, between the first interference parts 11 (first concave parts 41) adjacent to each other in the relative movement direction, the pressing force applied to the seat back 6 (the other party) is reduced compared to the first interference parts 11. Further, in this embodiment, second interference parts 21 (second convex parts 32) are also provided on the outer shape portion of the lower end of the seat back 6, and between the second interference parts 21 (second concave parts 42) adjacent to each other in the relative movement direction, the pressing force applied to the seat cushion 4 (the other party) is reduced compared to the pressing force by the second interference parts 21. Note that being reduced includes both the case where the pressing force becomes weak and the case where no pressing force is applied.

[0028] In the above-described vehicle seat 2, as shown in FIGS. 2 and 3, on the outer shape portion of the first part 10 (second part 20), that is, each interference part 11 (21) is formed by its shape itself. For this reason, it is not necessary to use a specific cover material (such as a yokohamabata fabric) for the cushion cover 4S (back cover 6S) that forms the appearance, and the configuration becomes one that easily unifies the appearance of the vehicle seat 2. And in the above-described configuration, by intermittently providing the plurality of each interference part 11 (21) in the relative movement direction and reducing the pressing force applied to the other party between the adjacent interference parts, it becomes possible to suppress the generation of abnormal noises. Therefore, the functions of each interference part 11, 21 will be described in detail below together with the tilting operation of the seat back 6.

[0029] Here, at the rear part (first part 10) of the seat cushion 4 shown in FIGS. 2 and 3, a first convex part 31 and a first concave part 41 as a first interference part 11 are provided. Also, at the lower end side (second part 20) of the seat back 6, a second convex part 32 and a second concave part 42 as a second interference part 21 are provided. In the above-described configuration (a configuration in which interference parts are provided in both parts), when the first part 10 and the second part 20 move relative to each other, they alternately displace into the following (1) first state and (2) second state described later. That is, (1) in the first state, the first convex part 31 of the first part 10 and the second convex part 32 of the second part 20 are pressed against each other, and the first concave part 41 of the first part 10 and the second concave part 42 of the second part 20 are spaced apart while facing each other. Also, (2) in the second state, the first convex part 31 of the first part 10 is fitted into the second concave part 42 of the second part 20, and the second convex part 32 of the second part 20 is fitted into the first concave part 41 of the first part 10.

[0030] [Function of the convex part and the concave part (interference part)] First, based on the case where the seat back 6 shown in FIGS. 2 and 3 is in the upright posture, the positional relationship between each of the above-described convex parts and each of the concave parts will be described. In this state, since it is desirable that no gap is formed between the lower end of the seat back 6 and the rear part of the seat cushion 4, it is set to be in the above-described (2) second state. That is, each first convex part 31 of the rear part (first part 10) of the seat cushion 4 is fitted into the corresponding second concave part 42 of the lower end (second part 20) of the seat back 6. Also, each second convex part 32 of the lower end (second part 20) of the seat back 6 is fitted into the corresponding first concave part 41 of the rear part (first part 10) of the seat cushion 4. In the above-described state, by fitting the first convex part 31 and the second concave part 42, and the second convex part 32 and the first concave part 41 vertically, it becomes difficult for a gap to be formed between the seat back 6 and the seat cushion 4 (the portion indicated by reference sign X in FIG. 1), and it becomes a configuration that contributes to ensuring the design quality of the seat.

[0031] Next, referring to FIGS. 1 and 7, the upper end side of the seat back 6 is rotated backward around the recliner 8 to recline the seat back 6. At this time, the lower end side (second part 20) of the seat back 6 moves forward on the seat while being pressed against the rear part of the seat cushion 4. As a result, the first convex portion 31 moves forward on the seat from the corresponding second concave portion 42 and is superposed on the corresponding second convex portion 32, that is, it is displaced to the state of (1) above. In this (1) first state, since the first interference portion 11 (first convex portion 31) and the second interference portion 21 (second convex portion 32) relatively move while being pressed against each other, the same friction as before occurs between the seat cushion 4 and the seat back 6 at the interference portion. Therefore, in the present embodiment, the first concave portion 41 is provided between adjacent first convex portions 31, and the second concave portion 42 is provided between adjacent second convex portions 32. And in the above-described configuration, in the (1) first state, the first concave portion 41 and the corresponding second concave portion 42 are separated while facing each other, so that the seat cushion 4 and the seat back 6 interfere only at their respective interference portions, that is, intermittently interfere. As a result, the pressing force (and contact area) applied between the seat cushion 4 and the seat back 6 in the first state is reduced, and it becomes possible to suppress the generation of abnormal noise.

[0032] And in the above-described configuration, as shown in FIG. 8, when the seat back 6 further reclines and the first part 10 and the second part 20 relatively move, both parts are displaced from the (1) first state to the (2) second state. That is, when the lower end side (second part 20) of the seat back 6 moves forward on the seat, the second convex portion 32 gets over the corresponding first convex portion 31 and fits into the first concave portion 41, and the first convex portion 31 gets over the corresponding second convex portion 32 and fits into the second concave portion 42. By fitting the first convex portion 31 into the second concave portion 42 in this way, the pressing force applied from the first convex portion 31 to the seat back 6 (the other party) is reduced compared to the first state. Similarly, by fitting the second convex portion 32 into the first concave portion 41, the pressing force applied from the second convex portion 32 to the seat cushion 4 (the other party) is reduced compared to the first state.

[0033] And until the seat back 6 assumes the reclined posture, the (1) first state shown in FIG. 9 and the (2) second state shown in FIG. 10 appear alternately. By alternately passing through the (1) first state and the (2) second state in this way, the period (contact time) of the (1) first state where friction increases the most can be made as short as possible, and the generation of abnormal noise caused by friction can be more reliably suppressed compared to the case where this first state continues. Thus, according to the above-described configuration, by intermittently presenting the first state during relative movement, the pressing force applied from each of the convex portions 31 and 32 to the other can be more reliably reduced.

[0034] [Modification Example] Here, referring to FIGS. 2 and 3, the configurations of the seat cushion 4 and the seat back 6 can take various configurations in addition to the above-described configuration. For example, similar to the embodiment, a first interference portion 11 (first convex portion 31) and a first concave portion 41 are provided at the rear portion of the seat cushion 4, and the lower end portion of the seat back 6 can be formed into a conventional seat back shape S2 without an uneven structure (the shape shown by the broken line in FIG. 3). Also with the above-described configuration, since the plurality of first interference portions 11 (first convex portions 31) are arranged intermittently, the pressing force applied to the seat back 6 (the other party) is reduced between adjacent first interference portions 11 (first concave portion 41). Furthermore, with the above-described configuration, the configuration of the seat back 6 can be made into a conventional shape. Conversely, by providing only the second interference portion 21 or the like on the lower end portion side of the seat back 6, the pressing force applied to the seat cushion 4 (the other party) is also reduced.

[0035] As described above, in this embodiment, a plurality of interference sites (11, 21) are provided at appropriate intervals, that is, intermittently, on the outer shape portions of the first part 10 and the second part 20. By intermittently providing the plurality of interference sites (11, 21) in the relative movement direction and reducing the pressing force applied to the other between adjacent interference sites, it becomes possible to suppress the generation of abnormal noise. In particular, in this embodiment, recessed portions (41, 42) that are recessed so as to be away from the other are provided between adjacent convex portions (forming a concavo-convex structure), so that the pressing force applied to the other can be more reliably reduced. And since the interference sites (11, 21) are formed in the outer shape portion (the shape itself) of each part, there is no need to use a specific cover material for the cushion cover 4S (back cover 6S) that forms the appearance, and the appearance of the vehicle seat 2 is easily unified. Therefore, according to this embodiment, it is possible to suppress the generation of abnormal noise while unifying the appearance of the vehicle interior parts.

[0036] Also, in the first state of this embodiment, for example, when the first part 10 is taken as one side, the first convex portion 31 (first interference site 11) on that one side presses the second convex portion 32 of the second part 20 (the other side), but the first concave portion 41 of the first part 10 (one side) provided between adjacent first convex portions and the second concave portion 42 of the second part 20 (the other side) are separated in a state of facing each other. Thereby, the pressing force applied to the second part 20 (the other side) in the first state is reduced. The same applies when the second part 20 is taken as one side. And in this embodiment, the first state is displaced to the second state by relative movement. In this second state, for example, when the first part 10 is taken as one side, the first convex portion 31 on that one side is fitted into the second concave portion 42 of the second part 20, so that the pressing force applied from this first convex portion 31 to the second part 20 (the other side) is reduced compared to the first state. The same applies when the second part 20 is taken as one side. Thus, according to the above-described configuration, by making the first state appear intermittently during relative movement, the pressing force applied to the other side can be more reliably reduced. And in this embodiment, by integrating the cushion cover 4S (back cover 6S) with the corresponding cushion pad 4P (back pad 6P), the outer shape portion of the first part 10 (second part 20) can be formed more appropriately.

[0037] [Example 2] Next, the vehicle seat 2A of Example 2 shown in FIG. 11 will be described. Here, in the vehicle seat 2A of this example, for the same configurations as those in Example 1, the same reference numerals as those in Example 1 are used and detailed descriptions thereof are omitted (the same applies to Examples 3 and 4 described later). The vehicle seat 2A of this example has substantially the same basic configuration as that of Example 1, but is different from Example 1 in that the first convex portions 31 are intermittently formed in the seat width direction.

[0038] At the rear part (the first part 10) of the seat cushion 4A shown in FIG. 11, relatively short first convex portions 31 (the first interference portions 11) are intermittently arranged in a row in the seat width direction. Further, a gap portion 60 is provided so as to extend in the seat width direction between the adjacent first convex portions 31 in the seat width direction. This gap portion 60 is a portion having a smaller protruding dimension than the first convex portion 31, and in this example, it is formed in a concave shape having substantially the same depth dimension as the first concave portion 41.

[0039] Then, in the seat cushion 4A shown in FIG. 11, the first convex portions 31 are arranged in a row in the seat width direction. Thereby, the rows 71, 72, 73, 74 of the first convex portions 31 are arranged at appropriate intervals in the seat front-rear direction, and further, the first concave portions 41 are formed between the adjacent rows. Here, the relationship between the rows adjacent to each other in the seat front-rear direction will be described by taking the first row 71 and the second row 72 as an example. When viewed from the seat front-rear direction, the first convex portion 31 of the first row 71 and the gap portion 60 of the second row 72 are arranged so as to overlap each other, and the gap portion 60 of the first row 71 and the first convex portion 31 of the second row 72 are arranged so as to overlap each other. Thereby, a configuration is adopted in which as little gap as possible is generated between the seat cushion 4A and the seat back 6. Although not shown, a plurality of second convex portions (second interference portions) can be formed in the same arrangement as that of the seat cushion 4A also on the lower end portion side (the second part) of the seat back, and the same configuration as that of Example 1 can also be adopted.

[0040] Even in the above-described configuration, when the seat back tilts (for example, in the first state), the first convex portion 31 (first interference portion 11) shown in FIG. 11 and a second convex portion (second interference portion) (not shown) relatively move while pressing against each other. At this time, in this embodiment, a gap portion 60 is provided between the first convex portions 31 adjacent to each other in the seat width direction. In this gap portion 60, the pressing force between the first convex portion 31 and the second convex portion is reduced. Thus, in this embodiment, by reducing the pressing force applied to the seat back (the other party) by the function of the gap portion 60, it becomes possible to more reliably suppress the generation of abnormal noise.

[0041] [Modification Example] Also, in the above-described configuration, it is also possible to continuously form only the first convex portions 31 in, for example, the first row 71 shown in FIG. 12, among each row, in the seat width direction. Thereby, it becomes difficult for a gap to occur between the rear portion of the seat cushion 4 and the lower end portion of the seat back, and the configuration contributes to ensuring the design property of the seat.

[0042] [Embodiment 3] Next, the vehicle seat 2B of Example 3 shown in FIG. 13 will be described. In the vehicle seat 2B of this example, a first convex portion 31 having a substantially triangular shape in a front view is formed at the rear portion (first portion 10) of the seat cushion 4B. And in the rear portion (first portion 10) of the seat cushion 4B, the point that the top portion (the most interfering portion) of the first convex portion 31 is arranged in a dot-like (dot-shaped) manner is different from Example 1. That is, in the rear portion (first portion 10) of the seat cushion 4B, rows 81, 82, 83, 84 of triangular first convex portions 31 arranged in the seat width direction are arranged at appropriate intervals in the seat front-rear direction. And the relationship between adjacent rows in the seat front-rear direction will be described taking the first row 81 and the second row 82 as an example. In the first row 81, the triangular first convex portion 31 (first interference portion 11) is formed intermittently, so that a gap portion 90 is formed between adjacent first convex portions in the seat width direction. And in the second row 82, the triangular first convex portions 31 are formed without gaps in the seat width direction, and are arranged so that the first convex portions 31 of the second row overlap the gap portion 90 of the first row when viewed from the seat front-rear direction. In the above-described configuration, by providing the first convex portion 31 (first interference portion 11) intermittently and arranging its top portion in a dot-like manner, the pressing force applied to the seat back (the other party) can be further reduced.

[0043] [Example 4] Next, the vehicle seat 2C of Example 4 shown in FIGS. 14 to 16 will be described. In the vehicle seat 2C of this example, it is different from Example 1 in that the first convex portions are formed only at the front end and the rear end of the rear portion (first portion 10) of the seat cushion 4. That is, in the rear portion (first portion 10) of the seat cushion 4C shown in FIGS. 15 and 16, the first convex portion 31A at the front end and the first convex portion 31B at the rear end are provided so as to be separated from each other in the front-rear direction of the seat. And a first concave portion 41 that is long in the front-rear direction of the seat is formed between the first convex portion 31A at the front end and the first convex portion 31B at the rear end. Further, on the lower end side (second portion 20) of the seat back 6, the second convex portion 32 and the second concave portion 42 are alternately formed in the same manner as in Example 1. In the above-described configuration, when the seat back 6 is tilted, the second convex portion 32 at the lower end of the seat back 6 passes through the first concave portion 41 that is long in the front-rear direction of the seat, so as to interfere with the rear portion of the seat cushion 4C as little as possible. Thereby, the pressing force applied to the seat back 6 (the other party) is reduced, and it becomes possible to more reliably suppress the generation of abnormal noise.

[0044] The vehicle seat (vehicle interior part) of the present embodiment is not limited to the above-described embodiment, and various other embodiments can be adopted. In this example, an example in which the seat back is tilted backward has been described, but the configuration of this example can also be applied when the seat back is tilted forward. Also, the dimensions, shapes, and formation numbers of the convex and concave portions can be set as appropriate. For example, the protruding dimension of the first convex portion shown in FIG. 3 can be made larger than the depth dimension of the second concave portion. Note that the convex and concave portions can be formed independently of the conventional seat cushion shape S1 (conventional seat back shape S2). Also, the convex portion may be slightly inclined in the seat width direction and the front-rear direction. Further, the convex portions may be provided in a lattice pattern so that the convex portion portions extending in the front-rear direction partially overlap the concave portions. Also, the configurations of each example and each modification can be used in appropriate combinations.

[0045] In addition, in this embodiment, only the concavo-convex structure has been described. Differently, for example, the portion corresponding to the first concave portion shown in FIG. 3 can be formed of a material softer than the first convex portion. In such a case, the shape of the seat cushion remains the same as the conventional one, but the hard portions (interference portions) corresponding to the first convex portions and the soft portions are arranged alternately. And at the hard portions (interference portions), the pressing force applied to the seat back (the other party) becomes large, and between the adjacent interference portions (soft portions), the pressing force applied to the seat back (the other party) is reduced. Also with the above-described configuration, the generation of abnormal noise can be suppressed. And the above-described configuration can be applied to at least one of the seat cushion and the seat back. When using a plurality of skin pieces, a pad material (another pad material) having a concavo-convex structure formed on the skin piece portion of the first portion (second portion) can be integrated in advance. And the skin pieces with the pad materials integrated in advance can be joined (retro-fitted) to the other skin pieces.

[0046] In this embodiment, a vehicle seat is exemplified as a vehicle interior component, and the seat cushion and the seat back are exemplified as the first part and the second part. The configuration of this embodiment is applicable when the first part of the vehicle interior component and the second part of the vehicle interior component or another member move relative to each other (rotate, move up and down, slide). For example, in the case of a vehicle seat, each part that moves relative to each other can be defined as the first part and the second part. Specifically, the seat back and the armrest that rotates back and forth relative to the seat back can be defined as the first part and the second part. Note that the armrest may be attached to the vehicle seat itself or may be constituted by a part of another vehicle seat (for example, a reclined seat back). Also, the seat back and the headrest that moves back and forth while being in contact with the seat back can be defined as the first part and the second part. When the seat cushion moves up and down or the like while being in contact with another vehicle interior component (another member) such as a console, the first part can be the seat cushion and the second part can be the console or the like. Note that the other member does not necessarily have to be a vehicle interior component and may be a body part of the vehicle (a structural part of the vehicle) provided with a cover and a pad. And the configuration of this embodiment can be applied to vehicle interior components in general, such as those of vehicles, airplanes, trains, and ships.

Explanation of Reference Numerals

[0047] 2 Vehicle seat 4 Seat cushion 4S Cushion cover 4P Cushion pad 6 Seat back 6S Back cover 6P Back pad 8 Recliner 10 First part 11 First interference part 20 Second part 21 Second interference part 31 First convex part 32 Second convex part 41 First concave part 42 Second concave part 2A Vehicle seat (of Example 2) 4A (Seat cushion of Example 2) 60 (Gap portion of Example 2) 71 - 74 (Rows of the first convex portions of Example 2) 2B (Vehicle seat of Example 3) 4B (Seat cushion of Example 3) 81 - 84 (Rows of the first convex portions of Example 3) 90 (Gap portion of Example 3) 2C (Vehicle seat of Example 4) 4C (Seat cushion of Example 4) 31A First convex portion at the front end 31B First convex portion at the rear end S1 Conventional seat cushion shape S2 Conventional seat back shape

Claims

1. In a noise suppression structure for a vehicle interior part that suppresses the generation of abnormal noise when a first part provided on the vehicle interior part and a second part provided on the vehicle interior part or another member adjacent to the first part move relative to each other in a pressed state, In the first part, a skin material is disposed along an outer shape portion formed of an elastically deformable pad material, and in the second part, another skin material is disposed along an outer shape portion formed of another elastically deformable pad material. On at least one of the outer shape portions of the first part and the second part, a plurality of interference portions are provided that press the other of the first part and the second part different from the one, and By arranging the plurality of interference portions at appropriate intervals in the relative movement direction of the first part and the second part, the pressing force applied to the other is reduced compared to the interference portions between the interference portions adjacent to each other in the relative movement direction. A noise suppression structure for a vehicle interior part.

2. As the interference portion, a convex portion protruding toward the other of the first part and the second part different from the one is provided on at least one of the outer shape portions of the first part and the second part, and between the convex portions adjacent to each other in the relative movement direction, A concave portion that is recessed so as to be separated from the other is provided. The noise suppression structure for a vehicle interior part according to claim 1.

3. The convex portion and the concave portion are formed in both the first part and the second part, and by the relative movement of the first part and the second part, the following (1) first state and (2) second state are alternately displaced. The noise suppression structure for a vehicle interior part according to claim 2. (1) In the first state, the convex portion of the first part and the convex portion of the second part are pressed against each other, and the concave portion of the first part and the concave portion of the second part are separated in a facing state. (2) In the second state, the convex portion of the first part is fitted into the concave portion of the second part, and the convex portion of the second part is fitted into the concave portion of the first part.

4. The noise suppression structure for a vehicle interior part according to any one of claims 1 to 3, wherein the pad material and the skin material are integrated, and the other pad material and the other skin material are integrated.

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