JP5910364B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat provided with a swinging member attached to a base so as to be swingable according to a seating mode of a seated person.

  Some vehicle seats are provided with a swinging member that is swingably attached to a base. The swinging member depends on the seating state of the seated person, specifically, the sitting posture, the presence / absence of the seating, and the like. Can be swung. Examples of the swinging member include various types such as a seat back, a seat cushion, an armrest, etc., but a seat back used for a rear seat includes one attached to a vehicle body as a base. The seat back is attached in a narrow vehicle interior. For this reason, a technique for simplifying the mounting work in a narrow vehicle interior has been developed. Specifically, in Patent Document 1 below, a technique for attaching a seat back to a vehicle body in a swingable manner by attaching a shaft to the vehicle body side and supporting the shaft in an attachment hole formed on a side surface of the seat back. Is described. With such a seat back, the seat back can be attached to the vehicle body simply by inserting the shaft into the attachment hole, and the attachment work can be simplified.

JP 9-86232 A

  According to the technique described in Patent Document 1, it is possible to easily attach the seat back to the vehicle body even in a narrow vehicle interior. However, if there is a clearance between the outer peripheral surface of the shaft and the inner peripheral surface of the mounting hole, the shaft may be displaced in the radial direction within the mounting hole, and the swinging member may be rattled. The present invention has been made in view of such circumstances, and it is possible to easily attach a swinging member such as a seat back to the base and to prevent the swinging member from rattling. It is an object to provide a vehicle seat.

In order to solve the above-mentioned problem, the vehicle seat according to claim 1 of the present application is provided with a swing member attached to the base so as to be swingable according to the seating mode of the seated person. A shaft portion provided on one of the base and the swinging member is rotatably held around an axis in an attachment hole formed on the other of the base and the swinging member, A holding member that is a member that divides a hole and holds the shaft portion is formed of a flexible material, and the inner diameter of the mounting hole of the holding member in a state where the shaft portion is not held is through, rather smaller than the outer diameter of the shaft portion, wherein the holding member holds the shaft portion in the cylindrical boss portion, said boss portion, which is formed on the other of the base and the rocking member Of the cylindrical member fixedly fitted in the hole The cylindrical member extends to the other of the base and the swinging member, and the tip end portion of the shaft held by the boss portion also has the base and the swinging motion. The shaft member extends to the other inside of the member, and the shaft portion includes a latching portion formed on an outer peripheral surface of a tip portion extending to the other inside of the base and the swinging member, and the cylindrical member Is characterized in that it has a hooked portion to which the hooking portion is hooked at a portion extending into the other of the base and the swinging member when the swinging member is deformed .

  The vehicle seat according to claim 2 is the vehicle seat according to claim 1, wherein the holding member has a taper surface inclined toward the inside of the mounting hole. .

  In the vehicle seat according to claim 1, the shaft portion provided on one of the swing member and the base is rotatably held in the mounting hole formed on the other, so that the swing member is the base. Is attached to be swingable. As a result, the swinging member can be attached to the base simply by inserting the shaft portion into the attachment hole, and the attachment operation can be simplified.

In the vehicle seat according to claim 1, the member defining the mounting hole is formed of a flexible material, and the inner diameter of the mounting hole in a state where the shaft portion is not inserted is the shaft portion. Is smaller than the outer diameter. That is, at the time of manufacture, when the swing member is attached to the base, the shaft portion is press-fitted into the attachment hole. Thereby, it is possible to eliminate the clearance between the outer peripheral surface of the shaft portion and the inner peripheral surface of the mounting hole, and it is possible to prevent the rocking member from rattling. In the vehicle seat according to claim 1, the shaft portion is held by a cylindrical boss portion of the holding member, and the boss portion is fixed inside the cylindrical member fixedly fitted in the through hole. Retained. The cylindrical member extends into the other of the swinging member and the base, and the tip portion of the shaft portion also extends into the other of the swinging member and the base. Furthermore, a latching portion is formed on the outer peripheral surface of the tip portion of the shaft portion extending to the inside of the other side. On the other hand, a hooked portion is formed at the end of the cylindrical member that extends to the other of the sliding member and the base. And when a rocking | swiveling member deform | transforms at the time of a vehicle collision etc., a latching part is latched by a to-be-latched part. Thereby, according to the vehicle seat of the first aspect, it is possible to prevent the shaft portion from being pulled out from the mounting hole at the time of a collision, and it is possible to suitably prevent the swinging member from dropping from the base. It becomes possible.

  In the vehicle seat according to the second aspect, the taper surface inclined toward the inside of the mounting hole is formed on the member that defines the mounting hole. As a result, when the swing member is attached to the base during manufacturing, the shaft portion can be inserted into the mounting hole along the taper surface. It can be made easy.

It is a perspective view which shows the vehicle seat which is the Example of this invention. It is a side view which shows the state which made the seat back of the vehicle seat shown in FIG. It is sectional drawing in the AA line shown in FIG. It is sectional drawing which shows the fixture for attaching a seat back to the floor of a vehicle body so that rocking | fluctuation is possible. It is a perspective view which shows the fixture for attaching a seat back to the floor of a vehicle body so that rocking | fluctuation is possible. It is sectional drawing which shows a seat back when a seat back deform | transforms.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as modes for carrying out the present invention.

<Configuration of vehicle seat>
FIG. 1 shows a vehicle seat 10 according to an embodiment of the present invention. The vehicle seat 10 is a seat used as a rear seat of the vehicle, a so-called rear seat, and is a split-foldable seat that can divide the seat back and fold it down independently. Specifically, the vehicle seat 10 includes a seat cushion 20 disposed over the entire vehicle width direction, a narrow right seat back 22 provided in a right-side portion of the seat cushion 20, and a seat. A wide left seat back 24 is provided in the left part of the cushion 20 so as to be able to fall down, and headrests 26 and 28 are provided in the right seat back 22 and the left seat back 24, respectively. In addition, the left-right direction in an Example is a direction in a passenger | crew's viewpoint in the state seated on the vehicle seat 10. FIG. That is, the direction toward the upper left in FIG. 1 is the right direction in the embodiment, and the direction toward the lower right in FIG. 1 is the left direction in the embodiment.

  The seat cushion 20 is fixedly provided on a floor (see FIG. 2) 30 of the vehicle body. On the other hand, each of the right seat back 22 and the left seat back 24 is swingably provided on the vehicle body, and as shown in FIG. 2, a standing state (solid line) and a forward-turning state (two-dot chain line) It is possible to change the posture between. Incidentally, each of the right seat back 22 and the left seat back 24 is provided with a fixing mechanism (not shown) for fixing the seat backs 22 and 24 in an upright state. By releasing the fixing of 22 and 24, the seat backs 22 and 24 can be swung forward to be brought forward.

  Here, the mounting structure of the seatbacks 22 and 24 to the vehicle body will be described in detail. The mounting structure of the right seatback 22 to the vehicle body and the mounting structure of the left seatback 24 to the vehicle body are symmetrical. Except for, it is almost the same. For this reason, the structure for attaching the right seat back 22 to the vehicle body will be described as a representative.

  As shown in FIG. 3 which is a cross-sectional view of the right seat back 22 in a state where the right seat back 22 is erected along the line AA shown in FIG. 2, the right seat back 22 and the left back A frame (see FIG. 4) 33, a back pad 34 disposed on the side of the right back frame 32 and the left back frame 33 on which a passenger sits, and a back panel surrounding the back surfaces of the right back frame 32 and the left back frame 33 36 and a seat side bracket 38 extending to the right side of the right seat back 22.

  The seat side bracket 38 is generally L-shaped, and a side surface 40 on the longitudinal side thereof is interposed between the right back frame 32 and the back pad 34 and is fixed to the right back frame 32. On the other hand, the short side surface 42 of the seat side bracket 38 constitutes the right side surface of the right seat back 22, and a through hole 44 is formed in the side surface 42.

  A generally cylindrical bush 50 is fitted in the through hole 44. The bush 50 includes a cylindrical portion 52 and a flange portion 54 formed at the end of the cylindrical portion 52. The outer diameter of the cylindrical portion 52 is slightly smaller than the inner diameter of the through hole 44, and the cylindrical portion 52 is fitted into the through hole 44 so that the flange portion 54 is located inside the right seat back 22. Has been. The bush 50 and the seat side bracket 38 are fixed by welding. In addition, a protrusion 56 that protrudes radially inward is formed on the inner peripheral surface of the end portion of the cylindrical portion 52 on the side where the flange portion 54 is formed.

  A generally annular bezel 60 is attached to the cylindrical portion 52 of the bush 50 to cover the edge of the opening on the outside of the right seat back 22 thereof. The bezel 60 is formed of a resin material having flexibility, a bezel main body portion 64 in which a mounting hole 62 is formed in the center portion, and a boss portion 66 erected so as to surround the mounting hole 62. It is constituted by. The outer diameter of the boss portion 66 is substantially the same as the inner diameter of the cylindrical portion 52 of the bush 50, and the boss portion 66 is fitted into the cylindrical portion 52 from the outside of the right seat back 22.

  The inner diameter of the boss 66 is the same as the diameter of the mounting hole 62 formed in the bezel main body 64, and each inner peripheral surface is smoothly continuous. A shaft 70 provided on the inner wall of the vehicle body is press-fitted into the continuous inner peripheral surface, and the right seat back 22 is pivotally supported by the shaft 70 so as to be swingable.

  Specifically, the shaft 70 is bolted to a body side bracket 74 fixed to the wheel house frame 72 at the base end portion, and extends into the vehicle interior via a through hole 78 formed in the trim 76. Yes. The outer diameter of the shaft 70 is slightly larger than the inner diameter of the mounting hole 62 formed in the bezel 60. Specifically, the outer diameter of the shaft 70 is about 10 mm, and the inner diameter of the mounting hole 62 is about 9 mm. Then, the distal end portion of the shaft 70 extending into the vehicle interior is press-fitted into the attachment hole 62 while bending the bezel main body portion 64 and the boss portion 66 of the bezel 60 that defines the attachment hole 62. Thus, the shaft 70 is rotatably held in the mounting hole 62, and the right seat back 22 is swingably attached to the inner wall of the vehicle body. Note that a taper surface 79 that is inclined toward the inside of the mounting hole 62 is formed in the bezel body portion 64 in which the mounting hole 62 is formed.

  The shaft 70 inserted into the mounting hole 62 passes through the bush 50 and extends into the right seat back 22. Specifically, the diameter of the insertion hole 80 defined by the protrusion 56 formed in the bush 50 is larger than the outer diameter of the shaft 70, and the shaft 70 is inserted through the insertion hole 80, and the right seat It extends into the back 22. A concave portion 81 is formed on the outer peripheral surface of the distal end portion of the shaft 70 extending into the right seat back 22, and the concave portion 81 faces the protruding portion 56 of the bush 50. .

  Further, as shown in FIG. 4, a shaft 82 is provided on the left side surface of the right seat back 22, and the right seat back 22 is attached to the shaft 82 by a fixture 84 provided on the floor of the vehicle body. It is pivotally supported. Specifically, an L-shaped seat side bracket 86 is fixed to the left back frame 33 of the right seat back 22. A shaft 82 is fixedly erected on the seat side bracket 86 and extends from the left side surface of the right seat back 22.

  As shown in FIG. 9, the fixture 84 that supports the shaft 82 extending from the left side surface of the right seat back 22 includes a floor fixing portion 88 that is fixed to the floor of the vehicle body, and the shaft 82. And a lid portion 92 that covers the shaft support portion 90. The shaft support 90 is formed with a notch 96 slightly larger than the outer diameter of the shaft 82, and the shaft 82 is supported by the notch 96 so that the right seat back 22 is supported by the fixture 84. The The lid portion 92 is provided on the shaft support portion 90 so as to be openable and closable, and the upper portion of the shaft support portion 90 that supports the shaft 82 in the notch portion 96 is covered with the lid portion 92.

  Incidentally, the left seat back 24 is also attached to the fixture 84, and as shown in FIG. 8, a shaft 98 erected on the right side surface of the left seat back 24 is attached to the right seat back 22. It is supported at the notch 96 of the shaft support 90 in a state of facing the shaft 82 erected on the left side surface.

<Attaching the vehicle seat to the vehicle body>
The attachment procedure when the vehicle seat 10 having the above structure is attached to the vehicle body in the vehicle manufacturing stage will be described in detail. First, the worker holds the right seat back 22 in the vehicle interior, attaches the shaft 70 protruding from the inner wall of the vehicle body into the vehicle interior, and attaches the bezel 60 attached to the right side surface of the right seat back 22 from the tip thereof. Insert into hole 62. At this time, since the outer diameter of the shaft 70 is slightly larger than the inner diameter of the mounting hole 62, the shaft 70 is press-fitted into the mounting hole 62.

  After the shaft 70 is inserted into the mounting hole 62, the shaft 82 erected on the left side surface of the right seat back 22 is hooked on the notch 96 of the shaft support 90 of the mounting tool 84 fixed on the floor of the vehicle body. . Then, the upper opening of the shaft support portion 90 in a state in which the shaft 82 is supported is closed by the lid portion 92, and the shaft support portion 90 and the lid portion 92 are fastened by a bolt. Accordingly, the right seat back 22 is attached to the vehicle body so as to be swingable. Although the shaft 70 is press-fitted into the mounting hole 62, the bezel 60 that defines the mounting hole 62 is formed of a resinous material, so that the right seat back 22 is smoothly swung. .

  In this way, the shaft 70 erected on the inner wall of the vehicle body is inserted into the mounting hole 62 formed on one side surface of the right seat back 22, and the shaft 82 erected on the other side surface is connected to the floor of the vehicle body. The right seat back 22 can be attached to the vehicle body simply by hooking it onto the fixture 84 fixed to the vehicle body. In particular, the bezel 60 in which the mounting hole 62 is formed has a taper surface 79 that is inclined toward the inside of the mounting hole 62. For this reason, the operator can insert the shaft 70 into the mounting hole 62 along the taper surface 79. Thereby, the operator can appropriately insert the shaft 70 into the mounting hole 62 even in a situation where it is difficult to visually check the mounting hole 62.

  Further, in the vehicle seat 10, as described above, the bezel 60 is formed of a flexible material, and the inner diameter of the mounting hole 62 in a state where the shaft 70 is not inserted is the outer diameter of the shaft 70. Have been smaller. For this reason, when the right seat back 22 is attached to the inner wall of the vehicle body, the shaft 70 is press-fitted into the attachment hole 62. As a result, the clearance between the outer peripheral surface of the shaft 70 and the inner peripheral surface of the mounting hole 62 can be eliminated, and rattling of the right seat back 22 can be suitably prevented.

<Deformation of seat back at the time of vehicle collision>
In the vehicle seat 10 having the above structure, the right seat back 22 is attached to the vehicle body by inserting the shaft 70 into the attachment hole 62. For this reason, when a collision or the like occurs in the vehicle, the right seat back 22 is deformed, and the shaft 70 is pulled out from the mounting hole 62, so that there is a concern that the right seat back 22 falls off. However, in the vehicle seat 10, when the right seat back 22 is deformed at the time of a vehicle collision, the protrusion 56 formed on the bush 50 is caught in the recess 81 formed on the shaft 70, and the shaft 70 is pulled out from the mounting hole 62. It is made not to put out.

  Specifically, in the event of a vehicle collision or the like, the acceleration in the front-rear direction of the seat occupant may change suddenly, and a large load may be input to the right seat back 22, causing the right seat back 22 to deform. In such a case, as shown in FIG. 6, a load is applied to a continuous portion of the two side surfaces 40 and 42 of the seat side bracket 38, and the seat side bracket 38 is bent. At this time, the bezel 60 that holds the shaft 70 is bent, the axis of the shaft 70 and the axis of the cylindrical portion 52 of the bush 50 are displaced, and the protrusion 56 formed on the bush 50 is a recess 81 formed on the shaft 70. Get caught in. Thereby, in the vehicle seat 10, it is possible to prevent the shaft 70 from being pulled out from the mounting hole 62 at the time of a vehicle collision, and it is possible to prevent the right seat back 22 from falling off. In FIG. 6, the back pad 34, the back panel 36, and the like are omitted.

  Incidentally, in the above-described embodiment, the vehicle seat 10 is an example of a vehicle seat, and the right seat back 22 and the left seat back 24 constituting the vehicle seat 10 are examples of swing members. The bezel 60 and the shaft 70 are an example of a holding member and a shaft portion, and the mounting hole 62 and the taper surface 79 formed in the bezel 60 are an example of a mounting hole and a taper surface. The concave portion 81 formed on the shaft 70 is an example of a hooking portion, and the protrusion 56 formed on the bush 50 is an example of a hooked portion. The inner wall of the vehicle body, specifically, the body side bracket 74 is an example of a base.

  In addition, this invention is not limited to the said Example, It can implement in the various aspect which gave various change and improvement based on the knowledge of those skilled in the art. Specifically, in the above embodiment, a seat back is adopted as the swing member, but various members constituting the vehicle seat, such as a seat cushion, an armrest, etc., can be adopted. In addition, when a seat cushion is employed as the swing member, it is desirable to employ the floor of the vehicle body as the base, and when an armrest is employed as the swing member, the seat back is employed as the base. It is desirable.

  In the above embodiment, the seat back as the swing member is provided with the bezel 60 as the holding member, and the vehicle body as the base is provided with the shaft 70 as the shaft portion. The holding member may be provided on the base.

10: Vehicle seat 22: Right seat back (swing member)
24: Left seat back (swing member)
56: Protruding part (covered part)
60: Bezel (holding member)
62: Mounting hole 70: Shaft (shaft)
74: Body side bracket (base)
80: Taper surface 81: Concave portion (hanging portion)

Claims (2)

In the vehicle seat provided with a swinging member attached to the base so as to be swingable according to the seating mode of the seated person,
A shaft portion provided on one of the base and the swinging member is held so as to be rotatable about an axis in an attachment hole formed on the other of the base and the swinging member,
A holding member that is a member that partitions the mounting hole and holds the shaft portion is formed of a flexible material,
Inner diameter of the mounting hole of the holding member in the state that does not hold the shank, rather smaller than the outer diameter of the shaft portion,
The holding member holds the shaft portion in a cylindrical boss portion,
The boss portion is fixedly held inside a cylindrical member fixedly fitted in a through hole formed in the other of the base and the swinging member,
The cylindrical member extends into the other of the base and the sliding member;
The tip portion of the shaft portion held in the boss portion also extends to the other inside of the base and the sliding member,
The shaft portion has a latching portion formed on an outer peripheral surface of a tip portion extending into the other of the base and the sliding member,
The cylindrical member has a hooked portion on which the hooking portion is hooked at a portion extending into the other of the base and the swinging member when the swinging member is deformed. Vehicle seat. The holding member is
2. The vehicle seat according to claim 1, further comprising a taper surface inclined toward the inside of the mounting hole.

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