JP5895743B2 - 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 members such as a seat back, a seat cushion, and an armrest. Among these various swinging members, the mounting operation to the base is performed in a narrow vehicle compartment at the time of manufacture. There is something to be said. For this reason, a technique for simplifying the mounting work in a narrow vehicle interior has been developed. Specifically, for example, a shaft is attached to one of the swing member and the base, and the shaft is pivotally supported in an attachment hole formed in the other of the swing member and the base, so that the swing member becomes the base. A technique for mounting in a swingable manner has been developed. With such a swing member, it is possible to attach the swing member to the base simply by inserting the shaft into the mounting hole, and the mounting work can be simplified.

  However, in the swinging member attached to the base by inserting the shaft into the mounting hole, when a collision or the like occurs in the vehicle, the swinging member may be deformed and the shaft may come out of the mounting hole. For this reason, there is a possibility that the swinging member may fall off the base at the time of a vehicle collision. In view of the above, in the swing member described in Patent Document 1 below, a flange portion is formed at the tip of the shaft, and the shaft can rotate in a mounting hole having an inner diameter smaller than the outer diameter of the flange portion. Is held in. As a result, the flange portion can prevent the shaft from being pulled out from the mounting hole, and the swinging member can be prevented from falling off due to a vehicle collision or the like.

JP 2011-156880 A

  According to the technique described in Patent Document 1, it is possible to prevent the swinging member from falling off due to a vehicle collision or the like by preventing the flange portion from being pulled out from the mounting hole of the shaft. On the other hand, since the flange portion for preventing the shaft from being pulled out from the mounting hole is formed at the tip of the shaft, it becomes difficult to insert the shaft into the mounting hole, and the mounting work of the swing member to the base is complicated. It becomes. The present invention has been made in view of such a situation, and for a vehicle in which the swinging member can be easily attached to the base and the swinging member can be prevented from falling off from the base. It is an object to provide a sheet.

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 swing member is rotatably held around an axis in an attachment hole formed on the other of the base and the swing member, And the other of the base having the mounting hole and the swinging member is hooked by the hooking portion when the swinging member is deformed. have a the latched portion to be stopped, the swing member, the deformed when the load input to the swinging member has a likely deformation promoting portion, the hook portion, when the deformation promoting portion is deformed It is latched by the said latched part, It is characterized by the above-mentioned .

According to a second aspect of the present invention , in the vehicle seat according to the first aspect, the other of the base and the swinging member in which the attachment hole is formed is based on an outer diameter of the shaft portion. The shaft portion has a recess formed on the outer peripheral surface, and the inside of the insertion hole is disposed so that the recess and the inner edge of the insertion hole face each other. The insertion, the concave portion functions as the hooking portion, and the inner edge of the insertion hole functions as the hooked portion.

In the vehicle seat according to the first aspect, the shaft portion provided on one of the swing member and the base is rotatably held in the mounting hole formed on the other. When the swing member is deformed at the time of a vehicle collision or the like, the hook portion formed on the outer peripheral surface of the shaft portion is hooked on the hook portion formed on the other of the base and the swing member. . That is, the latching portion and the latched portion are prevented from being caught during normal times other than when the vehicle collides. For this reason, at the time of manufacture, when inserting the shaft portion into the mounting hole, the hooking portion and the hooked portion are not caught, so the swinging member can be easily attached to the base, and the mounting work is facilitated. It becomes possible to make it simple. Further, when the swinging member is deformed at the time of a vehicle collision or the like, the latching portion and the latched portion are hooked, and the shaft portion is prevented from being pulled out from the mounting hole. As described above, according to the vehicle seat of the first aspect, it is possible to achieve both the mounting property of the swinging member at the time of manufacture and the prevention of the falling-off of the swinging member at the time of a vehicle collision or the like. Further, in the vehicle seat according to claim 1, the deformation promoting portion that is easily deformed when a load is input to the swinging member is formed on the swinging member. The hooked portion is hooked. As a result, when a large load is input to the swinging member at the time of a vehicle collision or the like, it is possible to reliably hook the latching portion and the latched portion, and the swinging member is prevented from falling off at the time of a vehicle collision or the like. It becomes possible to prevent suitably.

In the vehicle seat according to claim 2 , an insertion hole having an inner diameter larger than the outer diameter of the shaft portion is formed in the other of the base and the swing member, and the shaft portion is inserted into the insertion hole. Yes. A concave portion is formed on the outer peripheral surface of the shaft portion so as to face the inner edge of the insertion hole. And while a recessed part functions as a latching | locking part, the inner edge of an insertion hole functions as a to-be-latched part. That is, a recess formed on the outer peripheral surface of the shaft portion is located inside the insertion hole, and the recess is hooked on the inner edge of the insertion hole by deformation of the swing member. Thereby, even if the swinging member is deformed in any direction, the recess is caught on the inner edge of the insertion hole, and the swinging member can be reliably prevented from falling off.

1 is a perspective view showing a vehicle seat according to a first embodiment of the present 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 an expanded sectional view of the resin cap of the state holding the axis. 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. It is sectional drawing which shows the seat back of 2nd Example. It is sectional drawing which shows a seat back when the seat back of 2nd Example 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.
[First embodiment]

<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. 5) 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 is seated, 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. In addition, a slightly curved portion 46 is formed at the tip of the side surface 40, that is, at a location near the side surface 42.

  A generally annular resin cap 50 covering the edge of the through hole 44 formed in the side surface 42 is attached. The resin cap 50 is formed of a resin material, and includes a main body portion 54 in which a mounting hole 52 is formed at a central portion, and a boss portion 56 erected so as to surround the mounting hole 52. . As shown in FIG. 4, a concave portion 58 is formed on the outer peripheral surface of the boss portion 56 over the entire circumference, and the edge of the through hole 44 is hooked on the concave portion 58, so that the resin cap 50 is on the sheet side The bracket 38 is attached to be swingable.

  Specifically, the recess 58 is configured by two taper surfaces that are high in the width direction thereof, that is, in the extending direction of the boss portion 56 and are inclined toward both ends of the recess 58 in the width direction. . The diameter of the through hole 44 is substantially the same as the outer diameter of the central portion in the width direction of the concave portion 58, and the edge of the through hole 44 is in line contact with the central portion in the width direction of the concave portion 58. Yes. For this reason, the resin cap 50 can swing around the central portion in the width direction of the recess 58, that is, around the apexes of the two taper surfaces, as shown by the two-dot chain line in FIG. It is said that.

  As shown in FIG. 3, a shaft 60 provided on the inner wall of the vehicle body is inserted into the mounting hole 52 of the resin cap 50, and the right seat back 22 is pivotally supported by the shaft 60 so as to be swingable. Yes. Specifically, the shaft 60 is bolted to the body side bracket 64 fixed to the wheel house frame 62 at the base end portion, and extends into the vehicle interior via a through hole 68 formed in the trim 66. Yes. The shaft 60 extending into the passenger compartment is inserted into the mounting hole 52 of the resin cap 50 attached to the through hole 44 of the seat side bracket 38, and the tip of the shaft 60 extends from the resin cap 50 to the right seat back. 22 extends into the interior. A taper surface 70 that is inclined toward the inside of the mounting hole 52 is formed on the side surface side of the right seat back 22 of the main body portion 54 of the resin cap 50 into which the shaft 60 is inserted.

  The distal end portion of the shaft 60 extending from the resin cap 50 is inserted through a retaining member 72 fixed so as to be stacked on the seat side bracket 38. Specifically, the retaining member 72 is generally L-shaped, and the side surface 74 on the longitudinal side thereof is laminated on the side surface 40 of the back pad 34 and is fixed to the side surface 40. The side surface 74 of the retaining member 72 is laminated on the side surface 40 so as not to overlap the curved portion 46 formed on the side surface 40 of the seat side bracket 38.

  On the other hand, the short side surface 75 of the retaining member 72 is parallel to the side surface 42 on the inner side of the side surface 42 of the seat side bracket 38. An insertion hole 76 is formed in the side surface 75 of the retaining member 72 coaxially with the through hole 44 formed in the side surface 42 of the seat side bracket 38, and the inner diameter of the insertion hole 76 extends from the resin cap 50. The outer diameter of the shaft 60 is larger. The tip of the shaft 60 passes through the insertion hole 76 and extends into the right seat back 22. A concave portion 78 is formed over the entire outer peripheral surface of the tip portion of the shaft 60, and the concave portion 78 faces the edge of the insertion hole 76 through which the shaft 60 is inserted.

  Further, as shown in FIG. 5, 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. 6, 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. 5, a shaft 98 erected on the right side surface of the left seat back 24 is connected 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 operator holds the right seat back 22 in the vehicle interior, and inserts the shaft 60 protruding from the inner wall of the vehicle body into the vehicle interior in the mounting hole 52 of the resin cap 50 attached to the right side surface of the right seat back 22. Insert into.

  After inserting the shaft 60 into the mounting hole 52, 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.

  In this way, the shaft 60 erected on the inner wall of the vehicle body is inserted into the mounting hole 52 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, a taper surface 70 that is inclined toward the inside of the mounting hole 52 is formed in the resin cap 50 in which the mounting hole 52 is formed. For this reason, the operator can insert the shaft 60 into the mounting hole 52 along the taper surface 70. Thereby, the operator can appropriately insert the shaft 60 into the mounting hole 52 even in a situation where it is difficult to visually check the mounting hole 52.

  Furthermore, as described above, the resin cap 50 into which the shaft 60 is inserted is swingable. For this reason, even if the extending direction of the shaft 60 and the extending direction of the boss portion 56 of the resin cap 50 do not match, the shaft 60 is inserted into the mounting hole 52 of the resin cap 50 by the resin cap 50 swinging. It is possible to do. Thus, the operator can insert the shaft 60 into the mounting hole 52 without making the extending direction of the shaft 60 and the extending direction of the boss portion 56 of the resin cap 50 coincide with each other. It becomes possible to.

<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 60 into the attachment hole 52. For this reason, when a collision or the like occurs in the vehicle, the right seat back 22 is deformed, and the shaft 60 is pulled out from the mounting hole 52, 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 edge of the insertion hole 76 formed in the retaining member 72 is caught in the recess 78 formed in the shaft 60, and the shaft 60 is attached to the mounting hole. 52 so as not to be pulled 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 the curved portion 46 formed in the seat side bracket 38, and the seat side bracket 38 is bent. As a result, the center of the shaft 60 and the center of the insertion hole 76 formed in the retaining member 72 are displaced, and the edge of the insertion hole 76 is caught in the recess 78 formed in the shaft 60. Thereby, in the vehicle seat 10, it is possible to prevent the shaft 60 from being pulled out from the mounting hole 52 at the time of a vehicle collision, and it is possible to prevent the right seat back 22 from falling off. In FIG. 7, the back pad 34, the back panel 36, and the like are omitted.

As described above, in the vehicle seat 10, when the right seat back 22 is deformed at the time of a vehicle collision or the like, the recess 78 formed in the shaft 60 and the insertion hole 76 formed in the retaining member 72 are hooked, and the shaft Extraction from the 60 mounting holes 52 is prevented. On the other hand, when the shaft 60 is inserted into the mounting hole 52 during manufacturing, the recess 78 formed in the shaft 60 and the insertion hole 76 formed in the retaining member 72 do not interfere with each other. It can be attached to the vehicle body, and the attachment work can be simplified. Thereby, in the vehicle seat 10, compatibility between the mounting property of the seat back 22 at the time of manufacture and the prevention of the seat back 22 from falling off at the time of a vehicle collision or the like is achieved.
[Second Embodiment]

<Configuration of vehicle seat>
In the vehicle seat 10, the generally L-shaped retaining member 72 stacked on the seat-side bracket 38 prevents the shaft 60 from being pulled out from the mounting hole 52. A vehicle seat having a configuration different from such a configuration is shown in FIG. 8 as a vehicle seat 100 of the second embodiment. Since the vehicle seat 100 has substantially the same configuration as the vehicle seat 10 except for the configuration for attaching the seat back 102 to the vehicle body, the same reference numerals are used for components having the same functions as the vehicle seat 10. The description will be omitted or simplified using.

  Similar to the seat back 22, the seat back 102 of the vehicle seat 100 has a generally L-shaped seat side bracket 104 fixed to the right back frame 32, and the short side of the seat side bracket 104. A through-hole 108 is formed in the side surface 106 of this. A generally cylindrical bush 110 is fitted in the through hole 108.

  The bush 110 includes a cylindrical portion 112 and a flange portion 114 formed at the end of the cylindrical portion 112. The outer diameter of the cylindrical portion 112 is slightly smaller than the inner diameter of the through hole 108, and the cylindrical portion 112 is fitted into the through hole 108 so that the flange portion 114 is located inside the seat back 102. ing. The bush 110 and the seat side bracket 104 are fixed by welding. Further, a protrusion 116 protruding radially inward is formed on the inner peripheral surface of the end portion of the cylindrical portion 112 on the side where the flange portion 114 is formed.

  A generally annular bezel 120 is attached to the cylindrical portion 112 of the bush 110 to cover the edge of the opening on the outside of the seat back 102 thereof. The bezel 120 is formed of a resin material having flexibility, a bezel main body portion 124 in which a mounting hole 122 is formed in the central portion, and a boss portion 126 erected so as to surround the mounting hole 122. It is constituted by. The outer diameter of the boss portion 126 is substantially the same as the inner diameter of the cylindrical portion 112 of the bush 110, and the boss portion 126 is fitted into the cylindrical portion 112 from the outside of the seat back 102.

  The inner diameter of the boss portion 126 is the same as the diameter of the mounting hole 122 formed in the bezel main body portion 124, and each inner peripheral surface is smoothly continuous. A shaft 130 provided on the inner wall of the vehicle body is press-fitted into the continuous inner peripheral surface, and the seat back 102 is pivotally supported by the shaft 130 so as to be swingable.

  Specifically, the shaft 130 is bolted to the body side bracket 64 at the base end portion, and extends into the vehicle interior via a through hole 68 formed in the trim 66. The outer diameter of the shaft 130 is slightly larger than the inner diameter of the mounting hole 122 formed in the bezel 120. Specifically, the outer diameter of the shaft 130 is about 10 mm, and the inner diameter of the mounting hole 122 is about 9 mm. Then, the distal end portion of the shaft 130 extending into the vehicle interior is press-fitted into the attachment hole 122 while bending the bezel main body portion 124 and the boss portion 126 of the bezel 120 that defines the attachment hole 122. Thus, the shaft 130 is rotatably held in the mounting hole 122, and the seat back 102 is swingably attached to the inner wall of the vehicle body. A taper surface 132 that is inclined toward the inside of the mounting hole 122 is formed in the bezel body portion 124 in which the mounting hole 122 is formed.

  Further, the shaft 130 inserted into the mounting hole 122 passes through the bush 110 and extends into the seat back 102. Specifically, the diameter of the insertion hole 134 defined by the protrusion 116 formed in the bush 110 is larger than the outer diameter of the shaft 130, and the shaft 130 passes through the insertion hole 134, so that the seat back 102 extends into the interior. A recess 136 is formed over the entire outer periphery of the tip of the shaft 130 that extends into the seat back 102, and the recess 136 faces the protrusion 116 of the bush 110.

<Attaching the vehicle seat to the vehicle body>
With such a structure, also in the vehicle seat 100, the shaft 130 protruding from the inner wall of the vehicle body into the vehicle interior is inserted into the mounting hole 122 of the bezel 120 attached to the side surface of the seat back 102 in the vehicle manufacturing stage. Thus, the seat back 102 is attached to the inner wall of the vehicle body. However, since the outer diameter of the shaft 130 is slightly larger than the inner diameter of the mounting hole 122, the shaft 130 is press-fitted into the mounting hole 122. Although the shaft 130 is press-fitted into the mounting hole 122, the bezel 120 that defines the mounting hole 122 is formed of a resinous material, so that the seatback 102 can be smoothly swung.

  Also in the vehicle seat 100, similarly to the vehicle seat 10, a shaft 82 is fixed to the left side surface of the seat back 102, and the shaft 82 is attached to a fixture 84 fixed on the floor of the vehicle body. The seat back 102 is attached to the floor of the vehicle body by pivoting. Accordingly, the seat back 102 is attached to the vehicle body so as to be swingable. Also in the vehicle seat 100, the shaft 130 can be inserted into the mounting hole 122 using the taper surface 132 formed on the bezel 120. For this reason, the operator can appropriately insert the shaft 130 into the mounting hole 122 even when it is difficult to visually check the mounting hole 122.

  Further, in the vehicle seat 100, as described above, the bezel 120 is formed of a flexible material, and the inner diameter of the mounting hole 122 in a state where the shaft 130 is not inserted is the outer diameter of the shaft 130. Have been smaller. For this reason, when the seat back 102 is attached to the inner wall of the vehicle body, the shaft 130 is press-fitted into the attachment hole 122. Thereby, it is possible to eliminate the clearance between the outer peripheral surface of the shaft 130 and the inner peripheral surface of the mounting hole 122, and it is possible to suitably prevent the seat back 102 from rattling.

<Deformation of seat back at the time of vehicle collision>
Also in the vehicle seat 100 having the above structure, when the seat back 102 is deformed at the time of a vehicle collision, the seat back 102 is prevented from falling off by preventing the shaft 130 from being pulled out from the mounting hole 122. . Specifically, in the event of a vehicle collision or the like, as shown in FIG. 9, a load is applied to a continuous portion of the two side surfaces of the seat side bracket 104, and the seat side bracket 104 is bent. At this time, the bezel 120 that holds the shaft 130 is bent, the axis of the shaft 130 and the axis of the cylindrical portion 112 of the bush 110 are displaced, and the protrusion 116 formed on the bush 110 is a recess 136 formed on the shaft 130. Get caught in. Thereby, in the vehicle seat 100, it is possible to prevent the shaft 130 from being pulled out from the mounting hole 122 at the time of a vehicle collision, and it is possible to prevent the seat back 102 from falling off. In FIG. 9, the back pad 34, the back panel 36, and the like are omitted.

  As described above, even in the vehicle seat 100, when the seat back 102 is deformed at the time of a vehicle collision or the like, the recess 136 formed in the shaft 130 and the projection 116 of the bush 110 are caught, and the mounting hole 122 of the shaft 130 is engaged. Extraction from is prevented. On the other hand, when the shaft 130 is inserted into the mounting hole 122 during manufacturing, the recess 136 formed in the shaft 130 and the projection 116 formed in the bush 110 do not interfere with each other, so that the seat back 102 can be easily attached to the vehicle body. It becomes possible to make it easy to attach. Thereby, also in the vehicle seat 100, compatibility between the mounting property of the seat back 102 at the time of manufacture and the prevention of the seat back 102 from falling off at the time of a vehicle collision or the like is achieved.

  Incidentally, in the above-described embodiment, the vehicle seats 10 and 100 are examples of vehicle seats, and the right seat back 22, the left seat back 24, and the seat back 102 constituting the vehicle seats 10 and 100 are swung. It is an example of a member. The mounting holes 52 and 122 and the shafts 60 and 130 are examples of mounting holes and shaft portions, and the curved portion 46 formed in the seat side bracket 38 is an example of a deformation promoting portion. The recesses 78 and 136 formed in the shafts 60 and 130 are examples of the hooking portion and the recess, and the insertion hole 76 formed in the retaining member 72 and the insertion hole 134 of the protrusion 116 formed in the bush 110 are It is an example of an insertion hole. Further, the retaining member 72 and the projection 116 formed on the bush 110 are an example of a hooked portion, and the inner wall of the vehicle body, specifically, the body side bracket 64 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, the recesses 78 and 136 formed on the outer peripheral surfaces of the shafts 60 and 130 are employed as the latching portions, but the portion protruding from the outer peripheral surface of the shaft is used as the latching portion. It may be adopted. Moreover, the to-be-latched part by which a latching part is latched is not limited to an insertion hole, If it is a shape by which a latching part is latched, it can be set as various shapes, such as a recessed part and a convex part. .

  Further, in the above embodiment, the bending portion 46 in which a part of the seat side bracket is bent is adopted as the deformation promoting portion. However, the processing portion is deformed by performing various processing on the seat side bracket or the like. You may make it function as a promotion part. For example, each processed part may function as a deformation promoting part by forming a thin part, a notch part, a constricted part, etc. in the seat side bracket. Further, a part of the seat side bracket may be formed of a material that is easily deformed, and a part of the seat side bracket may function as a deformation promoting portion. Furthermore, a cylindrical shape may be adopted as the seat-side bracket, and a portion where the diameter changes may be used as the deformation promoting portion by changing the diameter of the cylindrical seat-side bracket. In addition, a deformation | transformation promotion part can be provided in various things other than a seat side bracket.

  In the above embodiment, the seat back is adopted as the swinging 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 mounting holes 52 and 122 are formed in the seat back as the swing member, and the shafts 60 and 130 are provided in the vehicle body as the base. However, the shaft is provided in the swing member and the base. A mounting hole may be formed on the surface.

10: Vehicle seat 22: Right seat back (swing member)
24: Left seat back (swing member)
46: Curved part (deformation promoting part)
52: Mounting hole 60: Shaft (shaft)
64: Body side bracket (base)
72: retaining member (covered portion)
76: Insertion hole 78: Concave portion (hanging portion)
100: Vehicle seat 102: Seat back (swing member)
116: Protruding part (covered part)
122: Mounting hole 130: Shaft (shaft)
134: Insertion hole 136: 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,
The shaft portion has a latching portion formed on the outer peripheral surface;
The other of the base in which the mounting hole is formed and the swing member is
Have a the latched portion to which the hook portion is hooked when the swing member is deformed,
The swing member is
A deformation promoting portion that easily deforms when a load is input to the swing member;
The latching portion is
A vehicle seat characterized in that the vehicle seat is hooked to the hooked portion when the deformation promoting portion is deformed . The other of the base in which the mounting hole is formed and the swing member is
A member having an insertion hole having an inner diameter larger than the outer diameter of the shaft portion;
The shaft portion is
It has a recess formed in the outer peripheral surface, and the inside of the insertion hole is inserted so that the recess and the inner edge of the insertion hole face each other.
2. The vehicle seat according to claim 1 , wherein the concave portion functions as the hooking portion, and an inner edge of the insertion hole functions as the hooked portion.

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