Vehicle seat

Abstract

To prevent discomfort abnormal sound from being generated without having difficulty in assembly work when assembling a resin plate on a side of a seat back even when there are variations in dimension in a height direction between a plurality of bosses formed on the resin plate.SOLUTION: A seat for a vehicle is configured so as to form a plurality of bosses in position opposed to a seat back side frame on a resin plate of a seat back, make some of the plurality of bosses come into contact with the seat back side frame and prevent the other bosses than the some of the plurality of bosses from coming into contact with the seat back side frame in such a condition that no load is applied on the resin plate, and make the some of the bosses and the other bosses than the some of the bosses come into contact with the seat back side frame to receive load in such a condition that the resin frame deforms by the load being applied in a direction of the seat back side frame.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vehicle seat. [Background technology]

[0002] The seat back of a vehicle seat comprises a cushion member provided on the side against which the back of a seated passenger rests, a frame supporting the cushion member, and a cover member covering the back surface of the frame.

[0003] Patent Document 1 describes a seat back configuration in which a back panel formed by pressing a metal plate is welded to a frame main body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-150732 A Summary of the Invention [Problem to be solved by the invention]

[0005] When the rear panel of the seat back is formed from resin instead of press-molded sheet metal as described in Patent Document 1, one possible method is to provide protrusions such as bosses at multiple points on the side of the resin rear panel and bring these protrusions into contact with the frame body, rather than having the resin rear panel contact the entire surface of the frame body.

[0006] However, when bosses or other protrusions are formed integrally with the plastic rear panel, depending on the forming conditions, there may be variations in height between the multiple bosses, which may make it difficult to assemble the plastic plate to the seat back.

[0007] In addition, when placing luggage on the plastic back panel with the seat back reclined toward the seat cushion, the multiple bosses may move while slightly touching the metal frame on the seat back, causing an unpleasant noise.

[0008] The present invention solves the above-mentioned problems by providing a vehicle seat that does not cause difficulties in the assembly work when assembling the resin plate to the seat back side even if there is some variation in the height dimension between multiple bosses formed on the resin plate of the seat back from the design dimension, and that can prevent the generation of unpleasant noises caused by the multiple bosses moving while slightly contacting the metal seat back frame. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the present invention provides a vehicle seat comprising a seat cushion, a seat back and a headrest, the seat back having a seat back side pad, a seat back side frame and a plastic plate, the plastic plate being formed with a plurality of bosses at positions facing the seat back side frame, and when the plastic plate is in an unloaded state, some of the plurality of bosses contact the seat back side frame, while the remaining bosses do not contact the seat back side frame.

[0010] Furthermore, in order to solve the above-mentioned problems, the present invention provides a vehicle seat that includes a seat cushion, a seat back, and a headrest, and the seat back has a seat back side pad, a seat back side frame, and a resin plate, and at a position of the resin plate facing the seat back side frame, a plurality of high bosses and a plurality of low bosses are formed integrally with the resin plate, and when the resin plate is in an unloaded state, the plurality of high bosses are in contact with the seat back side frame and the plurality of low bosses are away from the seat back side frame. Effect of the Invention

[0011] According to the present invention, even if there is some variation in the height dimension between the multiple bosses formed on the plastic plate of the seat back from the design dimension, there is no difficulty in assembling the plastic plate to the seat back.

[0012] Furthermore, according to the present invention, when the plastic plate is deformed under load, the structure is such that multiple bosses come into contact with the metal frame simultaneously, thereby reducing the concentration of stress on the plastic plate and enabling it to withstand relatively large loads.

[0013] Furthermore, according to the present invention, it is possible to prevent the generation of unpleasant noises caused by the movement of the bosses while they are in slight contact with the metal frame on the seat back side. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing an overall configuration of a vehicle seat according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view showing a state in which a seat back is reclined toward a seat cushion in a vehicle seat according to an embodiment of the present invention; [Diagram 3] FIG. 3 is a cross-sectional view taken along the arrows B-B in FIG. 2. [Figure 4] 1 is a perspective view of a vehicle seat according to an embodiment of the present invention, in which a seat back pad is removed and a seat back side frame and a resin plate are combined together. FIG. [Diagram 5] 1 is a front view of a vehicle seat according to an embodiment of the present invention, in which a seat back pad is removed and a seat back side frame and a resin plate are combined together. FIG. [Figure 6] 6 is a view showing the CC cross section of FIG. 5 upside down, in which the resin plate is in an unloaded state. [Figure 7] 6 is a view showing the CC cross section of FIG. 5 upside down, in which a load is applied to the resin plate in the direction of the arrow. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] To provide a structure in which, when a seat back of a vehicle seat is folded down toward a seat cushion and luggage is placed on the seat back, a boss formed on a resin plate covering the rear surface of the seat back hits a metal frame of the seat back, thereby preventing the resin plate from being significantly deflected.

[0016] In order for the plastic plate to support the weight of luggage placed on it, it is necessary to have a structure in which multiple bosses formed integrally with the plastic plate come into contact with the metal frame of the seat back at multiple points to support the load.

[0017] However, if the multiple bosses are configured so that they each come into contact with the metal frame when no load is applied, there are cases in which it becomes difficult to assemble the integrally formed plastic plate to the seat back due to variations in the height dimensions of the multiple bosses.

[0018] Furthermore, when the seat back is tilted or raised relative to the seat cushion while the boss is in slight contact with the metal frame due to variations in the height dimension, the boss may move while in slight contact with the metal frame, causing the boss and the metal frame to rub against each other and generating an unpleasant noise.

[0019] The present invention solves these problems by reducing the number of points where bosses integrally formed on the resin plate contact the metal frame of the seat back when the resin plate on the underside of the seat back is in an unloaded state, and by creating a structure in which multiple bosses formed on the resin plate simultaneously come into contact with the metal frame when the resin plate is deformed under load.

[0020] With this structure, even if the height dimension of the boss varies slightly from the design dimension, the assembly work when assembling the resin plate to the seat back side is not made difficult, and it is possible to prevent the generation of unpleasant noises caused by the boss moving while in slight contact with the metal frame.

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In all the drawings for explaining the embodiment, the same reference numerals are used to denote the same functions, and the repeated description is omitted as a rule.

[0022] However, the present invention should not be construed as being limited to the description of the embodiments shown below. It will be easily understood by those skilled in the art that the specific configurations can be modified without departing from the concept or spirit of the present invention. EXAMPLES

[0023] 1 is a perspective view showing an overall configuration of a vehicle seat 100 according to this embodiment. The vehicle seat 100 according to this embodiment includes a seat cushion 1 on which a passenger sits, a seat back 2 against which the seated passenger leans, and a headrest 3 for protecting the head of the seated passenger.

[0024] In addition, an actual vehicle seat is equipped with a reclining mechanism for adjusting the angle of the seat back 2 relative to the seat cushion 1, a blower for sending air to the seat cushion 1 and the seat back 2, and a lumbar mechanism for pushing the lower back of a seated passenger from the side of the seat back 2, but since these components are not directly related to the present invention, they will not be illustrated or described in order to simplify the explanation.

[0025] 2 is a perspective view showing a state in which the seat back 2 of the vehicle seat 100 according to this embodiment is folded down toward the seat cushion 1. By folding the seat back 2 down onto the seat cushion 1 in this manner, the upper surface of the seat back 2 (the upper surface of the seat back 2 in FIG. 2) can be made substantially parallel to the floor surface (the lower side of the seat cushion 1 in FIG. 2) of the vehicle (not shown), making it possible to place luggage on the upper surface of the seat back 2.

[0026] FIG. 3 shows a cross-sectional view taken along line BB in FIG. 2 in a state in which the seat back 2 is thus reclined toward the seat cushion 1. As shown in FIG.

[0027] In the state shown in Figure 3, the seat cushion side pad 11 held by the frame (seat cushion side frame) 12 on the seat cushion 1 side and the seat back side pad 21 held by the frame (seat back side frame) 22 on the seat back 2 side are in contact with each other, and the resin plate 23 held by the seat back side frame 22 is positioned on the upper surface of the seat back 2.

[0028] In the configuration shown in FIG. 3, the seat cushion side frame 12 and the seat back side frame 22 are rotatably connected by a connection plate 5 .

[0029] A cylindrical headrest support 25 is fixed to the seat back side frame 22. A tip portion of a headrest frame 32 that supports a cushion member 31 of the headrest 3 is inserted into the headrest support 25 and is supported.

[0030] Fig. 4 shows a cross-sectional view taken along the line AA of the vehicle seat 100 shown in Fig. 1. That is, Fig. 4 shows a state in which the seat back side frame 22 and the resin plate 23 are combined with the seat back side pad 21 of the seat back 2 removed, as viewed from an oblique direction.

[0031] 4, auxiliary frames 41 and 42 are connected between the seat back side frame 22 and the connecting bar 51, and a horizontal frame 43 is connected between the auxiliary frames 41 and 42. In addition, the resin plate 23 is formed with a plurality of protrusions (bosses) 24 that are formed integrally with the resin plate 23.

[0032] 5 shows a front view of the configuration in Fig. 4. Of the multiple protrusions (bosses) 24 (all the protrusions (bosses) shown in Fig. 5 are collectively referred to as protrusions (bosses) 24) formed on the resin plate 23, protrusions (bosses) 241, 242, 243, and 245, and protrusions (bosses) 2401, 2402, 2403, and 2404 are disposed on the rear side of the seat back side frame 22.

[0033] Moreover, the protrusions (bosses) 2403 and 2404 are disposed on the rear sides of the auxiliary frames 41 and 42 , and the protrusion (boss) 2406 is disposed on the rear side of the horizontal frame 43 .

[0034] Furthermore, the protrusions (bosses) 246 and 247, and 2407 and 2408 are disposed on the rear side of the connecting bar 51.

[0035] 6 and 7 are diagrams in which the CC cross section in FIG. 5 is turned upside down so that the resin plate 23 is on the upper side.

[0036] Fig. 6 shows a state where no load is applied to the resin plate 23, and Fig. 7 shows a state where a load is applied to the resin plate 23 from the direction of the arrow. That is, Fig. 5 shows a state where no luggage is placed on the resin plate 23 with the seat back 2 reclined toward the seat cushion 1 as shown in Fig. 3, and Fig. 6 shows a state where luggage is placed on the resin plate 23 with the seat back 2 reclined toward the seat cushion 1 as shown in Fig. 3, and a load is applied in the direction of the arrow shown in Fig. 7.

[0037] As shown in FIG. 6, when no load is applied to the resin plate 23, the protrusions (bosses) 241 and 242 formed on the resin plate 23 contact the seat back side frame 22, and a gap of distance d is formed between the protrusions (bosses) 2401 and 2402 arranged between the protrusions (bosses) 241 and 242 and the seat back side frame 22.

[0038] In this manner, by configuring the resin plate 23 so that only the protrusions (bosses) 241 and 242 formed thereon come into contact with the seatback side frame 22 when no load is applied to the resin plate 23, even if there is some variation in the height direction dimensions between the protrusions (bosses) 241 and 242 and the protrusions (bosses) 2401 and 2402, this will not cause a deterioration in the workability of assembly when assembling the resin plate 23 to the seatback side frame 22.

[0039] Furthermore, in a configuration in which the protrusions (bosses) 241 and 242 and the protrusions (bosses) 2401 and 2402 are in contact with the seatback side frame 22 at the same time, if there is some variation in the height direction between the protrusions (bosses) 241 and 242 and the protrusions (bosses) 2401 and 2402, the contact pressure with the seatback side frame 22 differs when the resin plate 23 is assembled to the seatback side frame 22, causing friction in the portion where the contact pressure is small, which causes abnormal noise. In contrast, in this embodiment, the height direction dimensions of the protrusions (bosses) 2401 and 2402 are set so that a gap of distance d is formed between the protrusions (bosses) 2401 and 2402 and the seatback side frame 22, thereby making it possible to prevent the generation of abnormal noise.

[0040] On the other hand, as shown in Fig. 7, when a load is applied to the resin plate 23 in the direction of the arrow, the resin plate 23 bends downward in Fig. 7, and the protrusions (bosses) 2401 and 2402 also come into contact with the seat back side frame 22. As a result, the load applied to the resin plate 23 in the direction of the arrow is supported by the protrusions (bosses) 241 and 242 and the protrusions (bosses) 2401 and 2402, and the amount of deformation of the resin plate 23 in the direction of the arrow can be limited to about d, making it possible to prevent the resin plate 23 from being significantly deformed due to the application of a load.

[0041] The configuration of the CC cross-sectional arrow view of Figure 5 has been explained using Figures 6 and 7, but the relationship between protrusions (bosses) 243, 245 and protrusions (bosses) 2403, 2404, 2406 shown in Figure 5, and the relationship between protrusions (bosses) 246, 247 and protrusions (bosses) 2407, 2408 are the same as the relationship between protrusions (bosses) 241, 242 and protrusions (bosses) 2401, 2402 in Figures 6 and 7.

[0042] In other words, protrusions (bosses) 2403, 2404, 2406 formed between protrusions (bosses) 243 and 245 are formed to be lower in height than protrusions (bosses) 243, 245, and when no load is applied to resin plate 23 (corresponding to the state described in Figure 6), protrusions (bosses) 243, 245 come into contact with seat back side frame 22, and protrusions (bosses) 2403, 2404, 2406 form gaps of distance d between auxiliary frames 41 and 42 and horizontal frame 43, respectively.

[0043] In addition, in an unloaded state where no load is applied to the resin plate 23 (corresponding to the state described in Figure 6), the protrusions (bosses) 246 and 247 contact the connecting bar 51, and the protrusions (bosses) 2407, 2408 formed between the protrusions (bosses) 246 and 247 form a gap of distance d between them and the connecting bar 51.

[0044] On the other hand, when a load is applied to the resin plate 23 (corresponding to the state described in Figure 7), all of the protrusions (bosses) 243, 245 and the protrusions (bosses) 2403, 2404, 2406 come into contact with the seat back side frame 22, and all of the protrusions (bosses) 246, 247 and the protrusions (bosses) 2407, 2408 come into contact with the connecting bar 51.

[0045] In this way, when no load is applied to the resin plate 23, only a portion of the numerous protrusions (bosses) formed on the resin plate 23 come into contact with the seat back side frame 22 or the connecting bar 51, whereas when a load is applied to the resin plate 23, all of the protrusions (bosses) 24 come into contact with either the seat back side frame 22, the connecting bar 51, the auxiliary frames 41 and 42, or the horizontal frame 43, thereby preventing the resin plate 23 from being significantly deformed.

[0046] 4 to 7 are described as having a circular cross section, but may have other cross-sectional shapes. The number of protrusions (bosses) 24 that do not contact the seat back side frame 22, the auxiliary frames 41 and 42, the horizontal frame 43, and the connecting bar 51 when no load is applied to the resin plate 23 described in the embodiment is merely an example, and may be more or less than the number described in the embodiment.

[0047] As described above, according to this embodiment, the resin plate 23 on the rear surface of the seat back 2 is structured to reduce the number of the multiple bosses 24 formed integrally with the resin plate 23 that come into contact with the seat back side frame 22 when the resin plate 23 is in an unloaded state. As a result, even if there is some variation in the height direction dimensions between the multiple bosses 24 from the design dimensions, there is no difficulty in assembling the resin plate 23 to the seat back 2 side.

[0048] On the other hand, when a load is applied to the resin plate 23 and the resin plate 23 is deformed, the multiple bosses 24 formed on the resin plate 23 simultaneously come into contact with the metal seat back side frame 22, the connecting bar 51, the auxiliary frames 41 and 42, and the horizontal frame 43, distributing the load. This structure makes it possible to reduce the concentration of stress on the resin plate 23 and enable the resin plate 23 to withstand a relatively large load.

[0049] In addition, when the seat back 2 is reclined toward the seat cushion 1 as shown in FIG. 2 and luggage is placed on the resin plate 23, the multiple bosses move while slightly contacting the metal seat back frame, thereby preventing the generation of unpleasant noises.

[0050] In the above embodiment, the resin plate 23 and the multiple protrusions (bosses) 24 are formed integrally, but they may be molded separately and the multiple protrusions (bosses) 24 formed separately may be connected (glued) to the resin plate 23.

[0051] In the above-described embodiment, for example, a height difference is provided between the protrusions (bosses) 241, 242 and the protrusions (bosses) 2401, 2402, so that the protrusions (bosses) 241, 242 come into contact with the metallic seat back side frame 22 when the resin plate 23 is in an unloaded state. However, it is also possible to form the protrusions (bosses) 241, 242 and the protrusions (bosses) 2401, 2402 at the same height without any height difference, and to provide recesses on the seat back side frame 22 at locations facing the protrusions (bosses) 2401, 2402, so that a distance d is formed between the protrusions (bosses) 2401, 2402 and the seat back side frame 22 when the resin plate 23 is in an unloaded state.

[0052] The invention made by the present inventor has been specifically described above based on the embodiments, but it goes without saying that the present invention is not limited to the above embodiments and can be modified in various ways without departing from the gist of the invention. For example, the above embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those having all of the configurations described. In addition, other known configurations can be added to or substituted for part of the configurations of the embodiments. [Explanation of symbols]

[0053] 1 seat cushion 2 Seat back 3 Headrest 22 Seat back frame 23 Resin Plate 24,241,242,243,245,246,247,2401,2402,2403,2404,2406,2407,2408 Protrusions (bosses) 41,42 Auxiliary frame 43 Horizontal Frame 51 Connecting bar 100 Vehicle seats

Claims

1. A vehicle seat including a seat cushion, a seat back, and a headrest, The seat back has a seat back side pad, a seat back side frame, and a resin plate, The resin plate is formed with a plurality of bosses at positions facing the seat back frame, a seat for a vehicle, characterized in that, when the resin plate is in an unloaded state, some of the plurality of bosses contact the seat back side frame, and the remaining bosses other than the some of the bosses do not contact the seat back side frame.

2. 2. The vehicle seat according to claim 1, A vehicle seat characterized in that, when a load is applied to the plastic plate in the direction of the seat back side frame and the plastic plate is deformed, some of the bosses and some of the bosses other than the some of the bosses are in contact with the seat back side frame to receive the load.

3. 3. The vehicle seat according to claim 1 or 2, The vehicle seat is characterized in that the seat back further includes an auxiliary frame connected to the seat back side frame and a connecting frame connected to the auxiliary frame, and the bosses are formed at a position of the resin plate facing the auxiliary frame and at a position facing the connecting frame.

4. 2. The vehicle seat according to claim 1, a seat for a vehicle, characterized in that among the plurality of bosses, some of the bosses that come into contact with the seat back side frame when the plastic plate is in an unloaded state are formed to be higher from the plastic plate than the bosses other than the some of the bosses that do not come into contact with the seat back side frame.

5. 3. The vehicle seat according to claim 1 or 2, The vehicle seat, wherein the plurality of bosses are integrally formed with the resin plate.

6. 3. The vehicle seat according to claim 1 or 2, A vehicle seat characterized in that the bosses other than the certain bosses that are not in contact with the seat back side frame are formed at a position sandwiched between a plurality of the certain bosses that are formed at a higher height from the resin plate than the bosses other than the certain bosses that are not in contact with the seat back side frame and are arranged along the seat back side frame.

7. A vehicle seat including a seat cushion, a seat back, and a headrest, The seat back has a seat back side pad, a seat back side frame, and a resin plate, a plurality of first bosses and a plurality of second bosses having a height from the resin plate lower than that of the plurality of first bosses are formed integrally with the resin plate at a position of the resin plate facing the seat back side frame, a seat for a vehicle, wherein when the resin plate is in an unloaded state, the plurality of first bosses are in contact with the seat back side frame and the plurality of second bosses are spaced apart from the seat back side frame.

8. 8. The vehicle seat according to claim 7, a seat for a vehicle, characterized in that when a load is applied to the plastic plate in the direction of the seat back side frame and the plastic plate is deformed, the plurality of first bosses and the plurality of second bosses are configured to contact the seat back side frame.

9. The vehicle seat according to claim 7 or 8, The vehicle seat is characterized in that the seat back further includes an auxiliary frame connected to the seat back side frame and a connecting frame connected to the auxiliary frame, and the plurality of second bosses are formed at a position of the resin plate facing the auxiliary frame and at a position facing the connecting frame.

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