Vehicle seat

Abstract

To provide a vehicle seat capable of curbing displacement of a supporting member with a simple structure.SOLUTION: A vehicle seat comprises: a pair of side frames 10 arranged in a horizontal direction with a distance therebetween; a pair of connection frame (a front frame 21 and a rear frame 22) which is arranged with a distance therebetween and connects the pair of side frames 10; and a support member 50 which has hook sections 52 and 53 hooked to the pair of connection frames, is installed on the pair of connection frames, and supports a passenger. Collars 70 with the rear frame 22 positioned therein are arranged between the hook section 53 and the side frames 10. The collars 70 regulate a position of the support member 50 in the horizontal direction by being brought into contact with the hook section 53.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat having a support member for supporting an occupant. [Background technology]

[0002] A seat cushion is known that has a frame-shaped cushion frame, and an S-spring as a support member for supporting an occupant is suspended between the front and rear frames of the cushion frame (Patent Document 1). In this seat cushion, a groove is formed in the connecting shaft that constitutes the rear frame to prevent the S-spring from shifting left or right, and a retainer that hooks the end of the S-spring is engaged in this groove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-225600 Summary of the Invention [Problem to be solved by the invention]

[0004] However, as in Patent Document 1, processing the rear frame poses a problem in that costs increase significantly.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vehicle seat that has a simple structure and is capable of suppressing displacement of a support member. Another object of the present invention is to suppress the generation of noise. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the vehicle seat of the present invention comprises a pair of side frames arranged at a distance from each other on the left and right, a pair of connecting frames arranged at a distance from each other and connecting the pair of side frames, and a support member for supporting an occupant that has a hook portion hooked to the pair of connecting frames and is installed on the pair of connecting frames, and a tubular member containing the connecting frame is provided at a position between the hook portion and the side frame. The cylindrical member is characterized in that it abuts against the hook portion to regulate the left-right position of the support member.

[0007] With this configuration, the hook portion of the support member abuts against the tubular member, thereby restricting the left-right position of the support member, thereby preventing misalignment of the support member with a simple structure and thereby preventing an increase in the cost of the vehicle seat.

[0008] In the vehicle seat described above, it is preferable that the tubular member is not fixed to the connecting frame.

[0009] In this way, by configuring the tubular member not to be fixed to the connecting frame, the tubular member can be easily attached to the connecting frame.

[0010] In the vehicle seat described above, the tubular member may be rotatably supported by the connecting frame.

[0011] In this way, by configuring the cylindrical member to be rotatable relative to the connecting frame, the contact portion between the cylindrical member and the hooking portion can be made less susceptible to wear.

[0012] In the vehicle seat described above, the tubular member may be fixed to the connecting frame.

[0013] In this way, by configuring the cylindrical member to be fixed to the connecting frame, the position of the cylindrical member does not shift, so that the position of the support member can be reliably regulated.

[0014] In the vehicle seat described above, the support member may be configured to include a metal wire and a resin member that covers at least a portion of the metal wire. In this case, it is preferable that the hooking portion has a portion that abuts against the tubular member that is configured of the resin member.

[0015] In this way, by making the hooking portion out of a resin member, it is possible to suppress the generation of noise when the hooking portion abuts against the cylindrical member.

[0016] In the vehicle seat described above, the tubular member is preferably made of resin.

[0017] In this way, by making the cylindrical member out of resin, it is possible to suppress the generation of noise when the hooking portion abuts against the cylindrical member. [Effects of the Invention]

[0018] According to the present invention, it is possible to suppress displacement of a support member that supports an occupant with a simple structure.

[0019] Furthermore, according to the present invention, the generation of noise can be suppressed. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a diagram showing a vehicle seat as a vehicle seat according to an embodiment; [Figure 2] FIG. 2 is a perspective view showing a cushion frame and a support member in the first embodiment. [Figure 3] FIG. 2 is a cross-sectional view taken along the axis of the rear frame of the cushion frame in the first embodiment. [Figure 4] FIG. 10 is a cross-sectional view taken along the axis of the rear frame of the cushion frame in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] [First embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In this specification, front, rear, left, right, top, and bottom are based on a passenger sitting in a seat. Furthermore, the inside and outside of the left-right direction are based on the seat, not the vehicle. As shown in FIG. 1, the vehicle seat of this embodiment is configured as a vehicle seat S to be used as a driver's seat or passenger seat in an automobile, and mainly includes a seat cushion S1 and a seat back S2.

[0022] The seat cushion S1 includes a cushion frame F1 (shown in Fig. 2) built into it, which forms the frame of the seat cushion S1. The seat cushion S1 is constructed by covering the cushion frame F1 with a pad made of urethane foam or the like and a covering material made of fabric, leather, or the like. Although not shown, the seat back S2 is constructed by covering a back frame that forms the frame of the seat back S2 with a pad and a covering material.

[0023] The cushion frame F1 includes a pair of side frames 10, a front frame 21 and a rear frame 22 as an example of a pair of connecting frames, and a pan frame 23. The side frames 10 are arranged in pairs on the left and right sides, spaced apart from each other. The front frame 21 and the rear frame 22 are arranged to be spaced apart from each other in the front-rear direction. The front frame 21 is made of a metal pipe with a circular cross section, and connects the front portions of the pair of side frames 10 together. The rear frame 22 is made of a metal pipe with a circular cross section, and connects the rear portions of the pair of side frames 10 together. The pan frame 23 is a frame made of a metal plate, and connects the front portions of the pair of side frames 10 together at a position forward of the front frame 21.

[0024] The cushion frame F1 is supported by a slide rail mechanism 30 via a height adjustment mechanism. The slide rail mechanism 30 is made up of a pair of lower rails 31 that extend longitudinally and are spaced apart on the left and right, and a pair of upper rails 32 that are engaged with the lower rails 31 so as to be slidable longitudinally. The lower rails 31 are fixed to the floor of the vehicle (not shown).

[0025] The height adjustment mechanism includes a pair of front links 35 and a pair of rear links 36. The front link 35 has an upper end rotatably connected to the front portion of the side frame 10 by a pin 35A, and a lower end rotatably connected to the front portion of the upper rail 32 by a pin 35B. The upper end of the rear link 36 is rotatably connected to the side frame 10. The lower end of the rear link 36 is rotatably connected to the rear of the upper rail 32 by a pin (not shown).

[0026] The front link 35 and the rear link 36, together with the upper rail 32 and the side frame 10, form a four-section link. The height of the side frame 10 can be changed by rotating the front link 35 or the rear link 36 relative to the side frame 10 using an electric or manual actuator (not shown).

[0027] As shown in Fig. 3, the rear frame 22 is connected to the side frame 10 via a cylindrical bracket 81. Since the configuration of each part is substantially symmetrical, only the cross section of the right side of the cushion frame F1 will be shown and explained in Fig. 3. The bracket 81 has a first cylindrical portion 81A and a second cylindrical portion 81B disposed outward in the left-right direction from the first cylindrical portion 81A. The first cylindrical portion 81A and the second cylindrical portion 81B are connected by a flange 81C that protrudes radially outward. The left and right inner ends of the first cylindrical portion 81A fit onto the outside of the rear frame 22 and are welded to the rear frame 22 by welds 91.

[0028] The side frame 10 has a circular support hole 11. The second cylindrical portion 81B of the bracket 81 is inserted into the support hole 11, and further, a washer 85 is fitted to the outside of the side frame 10, and the left and right outer ends are crimped. As a result, the rear frame 22 is assembled to the side frame 10 so as not to come off from the side frame 10, and is rotatably supported by the side frame 10.

[0029] The rear link 36 has a hole 36C, and is welded to the bracket 81 by a welded portion 92 with the first cylindrical portion 81A of the bracket 81 inserted into the hole 36C. This allows the rear link 36 to rotate integrally with the bracket 81 and the rear frame 22.

[0030] Returning to Figure 2, a support member 50 for supporting an occupant is disposed between the pair of side frames 10. The support member 50 is positioned below the pad of the seat cushion S1 (not shown) and supports the pad of the seat cushion S1 from below, i.e., from the side opposite to the occupant. The support member 50 has a main body portion 51 that supports the occupant, and a hook portion that is hooked to the pair of connecting frames, namely, a hook portion 52 that is hooked to the front frame 21 and a hook portion 53 that is hooked to the rear frame 22. Each of the hook portions 52, 53 has a hook shape with a semicircular cross section that follows the outer shapes of the front frame 21 and the rear frame 22. The hook portion 52 is hooked to the front frame 21 and the hook portion 53 is hooked to the rear frame 22 , so that the support member 50 is mounted across the front frame 21 and the rear frame 22 .

[0031] The support member 50 includes a plurality of metal wires 61 and a resin member 62 that covers at least a portion of the metal wires 61. In this embodiment, the resin member 62 covers the entire metal wires 61. Therefore, the resin member 62 can suppress corrosion of the metal wires 61 without requiring extensive rust prevention treatment of the metal wires 61.

[0032] The hooking portions 53 are provided in three, separated on the left and right, and hooked to the rear frame 22. The hooking portions 53 have outer ends in the left and right direction that are made of a resin member 62. A collar 70, which is an example of a cylindrical member, is provided between the left and right hook portions 53 and the side frame 10, respectively.

[0033] As shown in FIG. 3 , the collar 70 is made of resin and is formed in a cylindrical shape with an insertion hole 71. The rear frame 22 and the first cylindrical portion 81A of the bracket 81 are inserted into the insertion hole 71 of the collar 70, and the collar 70 is provided at a position between the rear link 36 and the hook portion 53. The collar 70 is not fixed to the rear frame 22 and the bracket 81, but is rotatably supported by the rear frame 22 and the bracket 81. The outer end of the collar 70 in the left-right direction is adjacent to the rear link 36, and by abutting against the rear link 36, outward movement in the left-right direction is restricted.

[0034] The left end of the right-side collar 70 is adjacent to the rightmost hook portion 53. As a result, when the support member 50 attempts to move to the right, the collar 70 abuts against the hook portion 53, thereby restricting the left-right position of the support member 50. Although not shown in the figures, the right end of the left-side collar 70 is adjacent to the leftmost hook portion 53, and when the support member 50 attempts to move to the left, the collar 70 abuts against the hook portion 53, thereby restricting the left-right position of the support member 50.

[0035] 3 shows the state in which the collar 70 abuts against the hook portion 53 and the rear link 36, but to facilitate the assembly of the support member 50 to the cushion frame F1, it is preferable that there is some play between the hook portion 53 and the collar 70 under normal circumstances. However, to enable the collar 70 to regulate the position of the support member 50 in the left-right direction, the play between the collar 70 and the left and right hook portions 53 when the collar 70 is in contact with the left and right rear links 36 is small, set to, for example, 10 mm or less.

[0036] According to the vehicle seat S configured as described above, if the support member 50 shifts left or right due to the occupant repeatedly sitting on the seat cushion S1 or due to repeated lateral force being applied while seated, the right or left hook portion 53 comes into contact with the collar 70, thereby restricting further movement of the support member 50. Because the collar 70 is formed as a separate part from the rear frame 22, it is possible to suppress an increase in manufacturing costs and to suppress shifting of the support member 50 with a simple structure, compared to when the rear frame 22 itself is processed to provide a portion that abuts the hook portion 53.

[0037] When the hooking portion 53 is in contact with the collar 70, if a load from the occupant is applied to the support member 50, the hooking portion 53 and the collar 70 may rub against each other, causing a creaking noise. However, since the part of the hooking portion 53 that contacts the collar 70 and the collar 70 are made of the resin member 62, the generation of this noise can be suppressed.

[0038] Furthermore, when the height adjustment mechanism is operated, the rear link 36 rotates. At this time, the rear frame 22 and bracket 81 also rotate together with the rear link 36, but because the collar 70 is rotatable relative to the rear frame 22 and bracket 81, the amount of relative rotation between the hook portion 53 and the collar 70 is small. Therefore, wear on the contact portion between the hook portion 53 and the collar 70 can be reduced compared to when the collar 70 rotates integrally with the rear frame 22 or bracket 81.

[0039] Furthermore, since the collar 70 is not fixed to the rear frame 22 or the bracket 81, the collar 70 can be assembled more easily than when the collar 70 is fixed to the rear frame 22 or the bracket 81.

[0040] [Second embodiment] Next, a second embodiment of the present invention will be described. The vehicle seat according to the second embodiment does not include the collar 70 as in the first embodiment.

[0041] As shown in FIG. 4 , in the second embodiment, the rear hook portion 153 of the support member 50 is configured to abut against the bracket 81 instead of a collar. Specifically, the rightmost hook portion 153 has a plate-shaped portion 153A extending along the rear frame 22 and a restricting portion 153B extending from the right end of the plate-shaped portion 153A toward the rear frame 22. The restricting portion 153B contacts the rear frame 22 and is adjacent to the first cylindrical portion 81A of the bracket 81. The first cylindrical portion 81A is an example of a tubular member and is provided between the hook portion 153 and the side frame 10 and fixed to the rear frame 22. When the support member 50 attempts to move rightward, the welded portion 91 of the first cylindrical portion 81A abuts against the restricting portion 153B, thereby restricting the left-right position of the support member 50. The restricting portion 153B is made of a resin member 62. The leftmost hook portion 153 also has a symmetrical configuration, and has a restricting portion 153B made of a resin member 62 at the left end portion.

[0042] The vehicle seat S configured in this manner can also restrict the position of the support member 50, as in the first embodiment. Since the bracket 81 is a member provided to connect the rear frame 22 to the side frame 10, according to this embodiment, it is possible to suppress displacement of the support member 50 with a simple structure while suppressing an increase in manufacturing costs.

[0043] Also in the second embodiment, the restricting portion 153B is made of the resin member 62, so that the generation of noise can be suppressed.

[0044] Furthermore, the first cylindrical portion 81A of the bracket 81 is fixed to the rear frame 22 and the rear link 36, and when the rear link 36 rotates, it rotates integrally with the rear frame 22 and the rear link 36. Therefore, even if the rear link 36 rotates, the positional relationship between the regulating portion 153B and the first cylindrical portion 81A is unlikely to change, and positional regulation can be reliably performed by the first cylindrical portion 81A.

[0045] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. The specific configuration can be appropriately changed as described below without departing from the spirit of the invention.

[0046] In the above-described embodiment, the vehicle seat is provided with a height adjustment mechanism, but the vehicle seat does not necessarily have to be provided with a height adjustment mechanism. For example, even if the rear link 36 is not provided in the first embodiment, the collar 70 abuts against the side frame 10, thereby restricting the collar 70 from moving outward in the left-right direction, and therefore the collar 70 can restrict the position of the support member 50.

[0047] In the first embodiment, the right and left hook portions 53 are described as coming into contact with the collar 70, but one of the left and right hook portions 53 may come into contact with the collar 70, and the other hook portion 53 may come into contact with the first cylindrical portion 81A of the bracket 81. Also, a cylindrical member of the present invention may be provided on only one of the left and right portions, and this cylindrical member may come into contact with the hook portions, while the other of the left and right portions may employ a position regulation structure different from that of the present invention.

[0048] In the above embodiment, a cylindrical member is provided between the rear hook portion 53, 153 and the side frame 10, but a tubular member may also be provided between the front hook portion 52 and the side frame 10, and this tubular member may be abutted against the front hook portion 52.

[0049] In the above embodiment, the support member 50 is disposed on the cushion frame F1, but the support member can also be disposed on the seat back frame. In this case, the support member can be installed in the vertical direction across the seat back frame, and the position of the support member can be restricted by abutting a cylindrical member such as a collar provided between the hook portion and the side frame on the hook portion.

[0050] In the above embodiment, the collar 70 and the first cylindrical portion 81A of the bracket 81, which are examples of cylindrical members, are cylindrical, but the cylindrical member may be formed in a cylindrical shape other than a cylindrical shape.

[0051] Furthermore, the shape of the cylindrical member does not need to be a completely closed cylinder, but may be a partially cut cylinder, for example, with a C-shaped cross section.

[0052] In the above embodiment, the portion of the hook 53 that contacts the tubular member is made of the resin member 62, but the portion of the hook that contacts the tubular member may also be made of metal.

[0053] Furthermore, in the above embodiment, a vehicle seat S mounted on an automobile is given as an example of a vehicle seat, but the vehicle seat is not limited to this and may also be a seat mounted on a vehicle other than an automobile, such as a railway vehicle, a ship, or an aircraft.

[0054] Furthermore, the elements described in the above-described embodiment and modified examples can be combined in any desired manner. [Explanation of symbols]

[0055] 10 Side frame 21 Front frame 22 Rear frame 50 Support member 53 Latch part 61 Metal wire 62 Resin parts 70 colors 81 Bracket 153 Latch part 153B Regulatory Department S vehicle seat

Claims

1. A cushion frame having left and right side frames positioned spaced apart from each other, and a rear frame connecting the left and right side frames, A support member having a plate-shaped main body and a fastening portion that is fastened to the rear frame, and supporting the occupant, Equipped with, The aforementioned latching portion has a plate-like portion that extends along the rear frame, A vehicle seat characterized by having a gap formed between the plate-like portion and the rear frame.

2. The vehicle seat according to Claim 1, characterized in that the latching portion has a plurality of protrusions that extend from the plate-shaped portion toward the rear frame and contact the rear frame.

3. The vehicle seat according to claim 2, characterized in that the plurality of protrusions are spaced apart from each other in the left-right direction.

4. The vehicle seat according to claim 2 or 3, wherein the latching portion comprises a metal wire and a resin member covering at least a portion of the metal wire, and the plurality of protruding portions are made of the resin member.

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