JP7161099B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat provided with a support member for supporting an occupant.

2. Description of the Related Art A seat cushion having a frame-shaped cushion frame and having an S spring as a support member for supporting an occupant between a front frame and a rear frame of the cushion frame is known (Patent Document 1). In order to prevent the S spring from shifting left and right, this seat cushion is formed by machining a connecting shaft that constitutes the rear frame to form a groove, and engaging a retainer in which the end of the S spring is engaged in the groove. there is

Japanese Patent Application Laid-Open No. 2002-225600

By the way, in the structure provided with the bracket for connecting the connecting shaft to the side frame, the joint portion of the bracket and the connecting frame and the hooking portion which is the part of the supporting member that hooks the connecting shaft are arranged appropriately. There is a need to.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to properly arrange joints and hooks .

In order to achieve the above object, the vehicle seat of the present invention comprises a pair of side frames spaced apart from each other in the left and right direction, and a pair of connecting frames spaced apart from each other and connecting the pair of side frames. , a bracket for connecting the connecting frame to the side frame, a hooking portion hooked to the pair of connecting frames, and a body portion for supporting an occupant; and a support member mounted on the frame.
The hooking portion has a contact portion that contacts the connection frame.
A joint portion between the bracket and the connecting frame is separated from the contact portion in the left-right direction.
Further, the pair of side frames and the pair of connecting frames constitute a cushion frame, the main body portion has an inclined portion that inclines outward and upward in the left-right direction, and the hook portion has the inclined portion. In a cross section taken along a plane perpendicular to the front-rear direction of the connecting frame, the joint is located above the upper end of one of the pair of side frames and the contact portion of the contact portion. It may be arranged below an imaginary line connecting the outer end of one of the side frames.
Further, the hooking portion may be arranged below the upper end of the one side frame.
Further, a plurality of the contact portions are arranged so as to be aligned with the joint portion in the left-right direction, and the joint portion is an outer contact which is the contact portion closest to the one side frame among the plurality of contact portions. It may be arranged outside the contact portion in the left-right direction.
Further, in the left-right direction, the distance from the joint portion to the outer contact portion may be smaller than the distance from the joint portion to the one side frame.
Further, the connecting frame has a cylindrical outer peripheral surface, the hooking portion has a spaced portion apart from the connecting frame in a radial direction of the connecting frame, and the spaced portion corresponds to the joint portion. may be arranged radially outside of the .
Further, the bracket may have a cylindrical inner peripheral surface, and the connection frame may be fitted to the inner peripheral surface of the bracket.
Also, the vehicle seat is rotatably connected to the side frame about a first axis, and is rotatably connected to another member about a second axis different from the first axis. and the hooking portion may be arranged below the upper end of the rotating link.
Further, the rotating link is arranged below the upper end of the one side frame and between the one side frame and the hooking portion in the left-right direction, and the joint portion is located at the rotating link. may be arranged below the upper end of the
Further, in a cross section of the connecting frame taken along a plane perpendicular to the front-rear direction, the joint portion is arranged below an imaginary line connecting the upper end of the rotating link and the outer end of the contact portion. may

The vehicle seat includes a pair of side frames spaced apart from each other in the left and right direction, a pair of connection frames spaced apart from each other and connecting the pair of side frames, and a pair of connection frames. and a support member that has a hook and is installed on the pair of connection frames to support the occupant.
The hooking portion abuts on the pair of side frames or is rotatably connected to the pair of side frames about a first axis, and is rotatable about a second axis different from the first axis to another member. a regulating portion that regulates the position of the support member in the left-right direction by coming into contact with the rotation link connected to the support member.
According to such a configuration, the support member can be regulated in the left-right direction by bringing the hooking portion of the support member into contact with the side frame or the rotating link. deviation can be suppressed. Therefore, it is possible to suppress an increase in the cost of the vehicle seat.

In the vehicle seat described above, the support member may include a metal wire and a resin member covering at least a portion of the metal wire. In this case, it is desirable that the restricting portion is made of a resin member.

Since the restricting portion is made of a resin member in this way, it is possible to suppress the generation of noise when the restricting portion is in contact with the side frame or the rotating link.

In the vehicle seat described above, it is preferable that the rotating link rotates integrally with the connecting frame or is rotatably supported by the connecting frame.

With such a configuration, even if the rotating link rotates, the positional relationship between the regulating portion and the rotating link is unlikely to change, and the position can be reliably regulated.

ADVANTAGE OF THE INVENTION According to this invention, a joint part and a latch part can be arrange|positioned appropriately .

Moreover, according to the present invention, it is possible to suppress the generation of sound.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the vehicle seat as a vehicle seat which concerns on embodiment. FIG. 4 is a perspective view showing a cushion frame and support members in the first embodiment; FIG. 4 is a cross-sectional view along the axis of the rear frame of the cushion frame in the first embodiment; FIG. 5 is a perspective view showing a cushion frame and support members in a second embodiment; FIG. 10 is a cross-sectional view along the axis of the rear frame of the cushion frame in the second embodiment;

[First Embodiment]
Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings. In this specification, front and rear, left and right, and up and down are based on the occupant sitting on the seat. Further, the inner side and the outer side in the left-right direction are based on the seat rather than the vehicle.
As shown in FIG. 1, the vehicle seat of this embodiment is configured as a vehicle seat S used in a driver's seat, a passenger's seat, etc. of an automobile, and mainly includes a seat cushion S1 and a seat back S2. It has

Inside the seat cushion S1, a cushion frame F1 as shown in FIG. 2, which constitutes the frame of the seat cushion S1, is incorporated. The seat cushion S1 is configured by covering a cushion frame F1 with a pad made of urethane foam or the like and a skin material made of cloth or leather. Although not shown, the seat back S2 is constructed by covering a back frame, which constitutes the frame of the seat back S2, with a pad and an upholstery material.

The cushion frame F<b>1 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 .
A pair of side frames 10 are arranged with a space left and right.
The front frame 21 and the rear frame 22 are 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 to each other.
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 to each other.
The pan frame 23 is a frame made of a metal plate, and connects front portions of the pair of side frames 10 at a position in front of the front frame 21 .

The cushion frame F1 is supported by the slide rail mechanism 30 via a height adjustment mechanism.
The slide rail mechanism 30 includes a pair of lower rails 31 that extend in the front-rear direction and are spaced apart in the left-right direction, and a pair of upper rails 32 that are engaged with the lower rails 31 so as to be slidable in the front-rear direction. consists of The lower rail 31 is fixed to the floor of the vehicle (not shown).

The height adjustment mechanism includes a pair of front links 35 and a pair of rear links 36 as an example of pivot links.
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 connected to the side frame 10 so as to be rotatable around the first shaft 36A. The lower end of the rear link 36 is rotatably connected to the rear portion of the upper rail 32, which is an example of another member, around a second shaft 36B different from the first shaft 36A by a pin (not shown).

The front link 35 and the rear link 36 form a four-bar link together with the upper rail 32 and the side frames 10 . The height of the side frame 10 can be changed by rotating the front link 35 or the rear link 36 with respect to the side frame 10 by an electric or manual actuator (not shown).

As shown in FIG. 3 , the rear frame 22 is connected to the side frames 10 via cylindrical brackets 81 . Since the configuration of each part is substantially symmetrical, FIG. 3 shows only the cross section of the right side of the cushion frame F1 for explanation.
The bracket 81 has a first cylindrical portion 81A and a second cylindrical portion 81B arranged laterally outwardly of the first cylindrical portion 81A. The first cylindrical portion 81A and the second cylindrical portion 81B are connected by a flange 81C projecting radially outward. Left and right inner end portions of the first cylindrical portion 81 A are fitted to the outer side of the rear frame 22 and welded to the rear frame 22 by welding portions 91 .

The side frame 10 has circular support holes 11 . The second cylindrical portion 81B of the bracket 81 is inserted through the support hole 11, and a washer 85 is fitted to the outside of the side frame 10, and left and right outer ends are crimped. Thereby, the rear frame 22 is attached 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 .

The rear link 36 has a hole 36C, and is welded to the bracket 81 by a welding portion 92 with the first cylindrical portion 81A of the bracket 81 being inserted through the hole 36C. This allows the rear link 36 to rotate integrally with the bracket 81 and the rear frame 22 . Also, since the rear link 36 rotates integrally with the rear frame 22 , the first shaft 36</b>A coincides with the axial center of the rear frame 22 .

Returning to FIG. 2, a support member 50 that supports the passenger is arranged between the pair of side frames 10. As shown in FIG. The support member 50 is positioned under the pad of the seat cushion S1 (not shown) and supports the pad of the seat cushion S1 from below, that is, from the side opposite to the occupant.
The support member 50 includes a body portion 51 that supports an occupant, and a hook portion 52 that is hooked to the front frame 21 and the rear frame 22 as hook portions that are hooked to a pair of connecting frames. and a hooking portion 53 to be engaged. Each of the hooking portions 52 and 53 has a hook shape with a semicircular cross section following the outer shape of the front frame 21 and the rear frame 22 .
The support member 50 is suspended between the front frame 21 and the rear frame 22 by hooking the hooking portion 52 on the front frame 21 and hooking the hooking portion 53 on the rear frame 22 .

The support member 50 includes a plurality of metal wires 61 and a resin member 62 covering at least a portion of the metal wires 61 . In this embodiment, the resin member 62 covers the entire metal wire 61 . Therefore, corrosion of the metal wire 61 can be suppressed by the resin member 62 even if the metal wire 61 is not subjected to a high antirust treatment.

Three hooking portions 53 hooked to the rear frame 22 are provided on the left and right sides.
As shown in FIG. 3 , the rightmost hooking portion 53 extends to the right, and the right end serves as a restricting portion 53</b>A that can come into contact with the rear link 36 . The restricting portion 53A restricts the position of the support member 50 in the left-right direction by coming into contact with the rear link 36 when the support member 50 attempts to move rightward. The restricting portion 53A is composed of a resin member 62. As shown in FIG. Although illustration is omitted, the leftmost hooking portion 53 also has a symmetrical configuration, and has a restricting portion 53A made of a resin member 62 at the left end portion.

Although FIG. 3 shows a state in which the restricting portion 53A is in contact with the rear link 36, in order to facilitate assembly of the support member 50 to the cushion frame F1, the restricting portion 53A is normally closed. There should be some play between the rear links 36 . However, the play with the left and right rear links 36 is set to be small, for example, 10 mm or less, so that the support member 50 can be regulated in the lateral direction by the regulating portion 53A.

According to the vehicle seat S configured as described above, the support member 50 is displaced in the left-right direction due to repeated sitting on the seat cushion S1 by the occupant or repeated application of force in the lateral direction while the occupant is seated. In this case, the right or left restricting portion 53A abuts on the rear link 36, thereby restricting the support member 50 from further movement. Since the rear link 36 is a member normally provided in a vehicle seat having a height adjustment mechanism, according to the present embodiment, the support member 50 can be attached to the support member 50 with a simple structure while suppressing an increase in manufacturing cost. Displacement can be suppressed.

If a load is applied to the support member 50 from the occupant while the restricting portion 53A is in contact with the rear link 36, the rear link 36 and the restricting portion 53A may rub against each other to generate a squeak noise. Since the restricting portion 53A is made of the resin member 62, the generation of this sound can be suppressed.

Also, when the height adjustment mechanism is operated, the rear link 36 rotates. At this time, if the restricting portion 53A is in contact with the rear link 36, there is a possibility that the rear link 36 rubs against the restricting portion 53A and generates a squeaky sound. Thus, the generation of this sound can be suppressed. In addition, since the rear link 36 rotates integrally with the rear frame 22, the positional relationship between the restricting portion 53A and the rear link 36 is unlikely to change even if the rear link 36 rotates. It can be carried out.

[Second embodiment]
Next, a second embodiment of the invention will be described. Since the vehicle seat according to the second embodiment differs from the first embodiment only in the structure of the supporting member 50, only this different part will be described.

As shown in FIGS. 4 and 5, in the second embodiment, the rear hooking portion 153 of the support member 50 is configured to contact the side frame 10 instead of the rear link 36 . Specifically, the rightmost hooking portion 153 has an enlarged diameter portion 153A extending radially outward at the right end portion and a restricting portion 153B extending from the enlarged diameter portion 153A toward the side frame 10. there is The restricting portion 153B restricts the lateral position of the support member 50 by contacting the side frame 10 when the support member 50 attempts to move rightward. The restricting portion 153B is composed of the resin member 62 . The leftmost hooking portion 153 also has a symmetrical configuration, and has a restricting portion 153B made of a resin member 62 at the left end.

The position of the support member 50 can also be regulated by the vehicle seat S configured in this way, as in the first embodiment. Since the side frame 10 is a member normally provided in a vehicle seat, according to the present embodiment, it is possible to suppress the displacement of the support member 50 with a simple structure while suppressing an increase in manufacturing cost.

Also in the second embodiment, since the restricting portion 153B is made of the resin member 62, it is possible to suppress the generation of sound.

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 changed as appropriate without departing from the spirit of the invention as described below.

Although the rear link 36 was configured to rotate together with the rear frame 22 in the above embodiment, it may be configured to rotate relative to the rear frame 22 . For example, the rear frame 22 may be configured such that the ends thereof are fixed to the side frames 10 and the rear link 36 is rotatably supported by the rear frame 22 . That is, the rear link 36 may be configured to be rotatably connected to the side frame 10 via the rear frame 22 . In this case as well, the positional relationship between the restricting portion 53A and the rear link 36 is unlikely to change when the rear link 36 rotates, and the restricting portion 53A can reliably perform positional restriction.

In the above embodiment, the vehicle seat includes the height adjustment mechanism, but may not include the height adjustment mechanism. For example, in the second embodiment, even if there is no rear link 36, the position of the support member 50 can be regulated by bringing the regulating portion 153B into contact with the side frame 10. FIG.

In the first embodiment, the case where both the right restricting portion 53A and the left restricting portion 53A abut on the rear link 36 has been described, but one of the left and right restricting portions abuts on a rotating link such as a rear link. , the other restricting portion may be configured to abut on the side frame. In addition, only one of the left and right sides is provided with the restricting portion of the present invention, and this restricting portion abuts on the side frame or the rotating link. may

In the above embodiment, the case where the rear hooking portions 53 and 153 have the restricting portions 53A and 153B has been described, but the front hooking portion 52 may have the restricting portions. That is, the front hooking portion 52 may contact the side frame 10 or the front link 35 . When the hooking portion 52 is brought into contact with the front link 35 , the front link 35 is preferably arranged inside the side frame 10 in the left-right direction.

Although the support member 50 is arranged on the cushion frame F1 in the above embodiment, the support member can also be arranged on the seat back frame. In this case as well, it is possible to restrict the position of the support member by vertically extending the support member with respect to the seatback frame and bringing the hook portion into contact with the side frame or the like.

In the above-described embodiment, the vehicle seat S mounted in an automobile was exemplified as the vehicle seat, but the vehicle seat is not limited to this, and can be used in vehicles other than automobiles, such as railway vehicles, ships, and aircraft. It may be a seat mounted on the

In addition, it is also possible to arbitrarily combine the elements described in the above-described embodiment and modifications.

REFERENCE SIGNS LIST 10 side frame 21 front frame 22 rear frame 30 slide rail mechanism 35 front link 36 rear link 36A first shaft 36B second shaft 50 support member 53 locking portion 53A regulating portion 61 metal wire rod 62 resin member 81 bracket 153 locking portion 153B Regulating part F1 Cushion frame S Vehicle seat

Claims (9)

a pair of side frames spaced apart on the left and right;
a pair of connecting frames arranged apart from each other and connecting the pair of side frames;
a bracket for connecting the connecting frame to the side frame;
A support member having a hooking portion hooked to the pair of connecting frames and a body portion that is a portion that supports an occupant, and a support member that is constructed over the pair of connecting frames,
The hooking portion has a contact portion that contacts the connecting frame,
The welded portion between the bracket and the connecting frame is separated from the contact portion in the left-right direction,
The pair of side frames and the pair of connecting frames constitute a cushion frame,
The main body has an inclined portion that inclines outward and upward in the left-right direction,
1. A vehicle seat according to claim 1, wherein said hooking portion includes a metal wire, said metal wire is coated with resin , and said hooking portion extends to the outside of said inclined portion in the left-right direction . The contact portion includes a resin portion covering the metal wire under the metal wire, and a plurality of portions that contact the connection frame at positions left and right away from the metal wire, 2. The vehicle seat according to claim 1, wherein the metal wire is closer to the abutting portion under the metal wire than the upper end of the hooking portion. 3. The vehicle seat according to claim 1, wherein the engaging portion is arranged below an upper end of one of the side frames. A plurality of the contact portions are arranged so as to line up with the weld portion in the left-right direction,
1 to 4, wherein the welded portion is arranged laterally outside an outer contact portion, which is a contact portion closest to one of the plurality of contact portions to the side frame. 4. The vehicle seat according to any one of 3. The connection frame has a cylindrical outer peripheral surface,
the hooking portion has a spaced portion spaced apart from the connecting frame in the radial direction of the connecting frame;
The vehicle seat according to any one of claims 1 to 4, wherein the separation portion covers the welded portion from the outer side and the upper side in the radial direction. The bracket has a cylindrical inner peripheral surface,
The vehicle seat according to any one of claims 2 to 5 , wherein the connecting frame is fitted to the inner peripheral surface of the bracket. a pivot link rotatably connected to the side frame about a first axis and rotatably connected to another member about a second axis different from the first axis;
7. The vehicle seat according to any one of claims 1 to 6 , wherein the engaging portion is arranged below an upper end of the rotating link. The rotating link is arranged below the upper end of the one side frame and between the one side frame and the hook portion in the left-right direction,
8. The vehicle seat according to claim 7 , wherein the welded portion is arranged below the upper end of the pivot link. The engaging portion is connected to the pair of side frames by abutting on the pair of side frames, or is rotatably connected to the pair of side frames about a first axis, and is connected to the pair of side frames about a second axis different from the first axis. 9. The support member according to any one of claims 1 to 8, wherein the position of the support member in the left-right direction is regulated by abutting on a rotation link rotatably connected to the member of the support member. vehicle seat.

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