JP5217398B2 - Vehicle seat structure - Google Patents

Description

  The present invention relates to a vehicle seat structure. More specifically, the present invention relates to a vehicle seat structure in which side frames forming a skeleton of a seat back are disposed on both sides of the seat back.

2. Description of the Related Art Conventionally, in a vehicle seat structure, a structure in which both side frames constituting a skeleton of a seat back are reinforced by being connected to each other by a reinforcing member such as a pipe is known. Here, Patent Document 1 below discloses a structure in which the above-described side frames are reinforced by being connected to each other by a plurality of reinforcing members.
JP 2006-290222 A

  However, in the configuration in which the side frames are connected by a plurality of reinforcing members as in the related art disclosed above, a large space is required for installing the reinforcing members.

  The present invention was devised as a solution to the above-described problems, and the problem to be solved by the present invention is that the installation space is increased even if a reinforcing member for connecting the side frames of the seat back is added. It is to be able to suppress the increase in the amount to be small.

In order to solve the above problems, the vehicle seat structure of the present invention takes the following means.
A first invention is a vehicle seat structure in which side frames forming a skeleton of a seat back are disposed on both side portions of the seat back. In the seat back, each side frame is connected to a skeleton of a base member such as a seat cushion via a reclining device functioning as a rotation-retaining device so that the backrest angle can be adjusted. In each reclining device, a rotating shaft that adjusts the backrest angle of each other's seat back is integrally connected in the rotational direction by a connecting shaft that is inserted through each side frame. Between the side frames, an electric motor that rotates the connecting shaft is connected to the connecting shaft at an internal position of the seat back adjacent to the one side frame. An extension member that extends so as to sandwich the electric motor between the one side frame is integrally formed on one side frame in which the electric motor is disposed adjacently. Between the extension member and the other side frame, a tubular reinforcing member that allows the connecting shaft to be inserted therein is integrally connected to the extension member and the other side frame.

  According to the first aspect of the present invention, the arrangement space of the connecting shaft is absorbed by the arrangement space of the reinforcing member by arranging the connecting shaft so as to be inserted into the pipe of the reinforcing member. The reinforcing member is integrally connected to the extension member that extends so as to avoid the electric motor and the other side frame, so that the electric motor is disposed between the side frames. Also in the configuration, both side frames can be firmly and integrally connected to each other. Thereby, even if the reinforcement member which connects the side frames of a seat back is added, the increase in this installation space can be suppressed small.

Next, according to a second invention, in the first invention described above, the connecting shaft is inserted into the rotating shaft in the axial direction so as to be integrally assembled with each other in the rotating direction. The reinforcing member is formed in a circular tube shape, and is arranged and set so that its axis is coaxial with the rotation axis. A guide structure for guiding the insertion movement of the connecting shaft along the axis of the reinforcing member is provided in the pipe of the reinforcing member.
According to the second aspect of the present invention, the connecting shaft is inserted along the inside of the reinforcing member pipe by the guide structure provided in the reinforcing member pipe, so that the connecting shaft is inserted in a state where the rotation shaft and the shaft center are aligned. To be guided. Therefore, by inserting the connecting shaft along the pipe of the reinforcing member, the connecting shaft can be easily assembled with the rotating shaft so as to be integrated with the rotating direction.

Next, according to a third aspect, in the second aspect described above, the guide structure provided in the pipe of the reinforcing member has an inclined surface that guides the insertion movement of the connecting shaft toward the axial center of the reinforcing member. The guide member thus assembled is assembled to the opening end of the reinforcing member.
According to the third aspect of the invention, the guide structure for guiding the insertion movement of the connecting shaft is configured as a guide member that is assembled to the opening end portion of the reinforcing member, so that the guide structure can be easily provided in the pipe of the reinforcing member. Can be set.

Next, according to a fourth invention, in any one of the first to third inventions described above, a resin component is provided between the extension member and the electric motor so as to be interposed between the axial gaps.
According to the fourth aspect of the invention, since the resin component is provided in the axial gap between the extension member and the electric motor, a large load from the side is input to the seat back during a side collision or the like. The axial deformation of the extension member is suppressed. Further, since the intervening part is a resin part, it is possible to reduce the hit as compared with the case where the iron part is brought into contact with the electric motor, and to suppress the transmission of vibration from the electric motor to other parts. .

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the vehicle seat structure of the first embodiment will be described with reference to FIGS. Here, FIG. 1 shows a skeletal structure of the seat back 1 constituting the backrest of the vehicle seat as the vehicle seat structure of the present embodiment. As shown in the figure, the back frame 10 constituting the skeleton of the seat back 1 comprises the upper frame 11 extending in the width direction constituting the skeleton of the upper edge portion of the seat back 1 and the skeletons on both sides of the seat back 1. The side frames 12 and 13 extending in the height direction are formed in a gate shape. Here, the side frame 12 corresponds to one side frame of the present invention, and the side frame 13 corresponds to the other side frame of the present invention.

  Specifically, the upper frame 11 is formed by bending a circular steel pipe into an inverted U shape. Each of the side frames 12 and 13 is formed of a steel plate, and is disposed on both sides of the seat back 1 so that the plate surfaces thereof face each other. These side frames 12 and 13 have their upper ends bent into a semi-pipe shape in accordance with the shape of each end of the upper frame 11 described above, and applied to the outer peripheral surface of each end of the upper frame 11. They are broken and are rigidly joined together by welding.

  The upper frame 11 is rigidly coupled integrally with the gate-shaped legs by a reinforcing plate 14 made of a steel plate. The side frames 12 and 13 are rigidly coupled integrally with each other at their lower edges by a reinforcing plate 15 made of a steel plate. Thus, the back frame 10 is formed in a frame shape by the upper frame 11, the side frames 12 and 13, and the reinforcing plates 14 and 15.

  The back frame 10 having the above-described configuration is connected to the side frames 2F and 2F that form the skeleton of the seat cushion 2 by the reclining devices 20 and 20 that function as rotation stoppers at the lower edges of the side frames 12 and 13, respectively. Has been. Here, the side frames 2F and 2F of the seat cushion 2 correspond to the skeleton of the base member of the present invention. These side frames 2F and 2F are respectively arranged at positions outside the side frames 12 and 13 of the back frame 10 as shown in FIGS. Each reclining device 20, 20 has a known configuration disclosed in a document such as Japanese Patent Application Laid-Open No. 2005-270298. Therefore, only the outline of the configuration of the reclining device 20 on one side will be briefly described below.

  As shown in FIG. 3, the reclining device 20 is configured by assembling an internal tooth member 21, an external tooth member 22, an outer peripheral ring 23, and a rotating shaft 24. Specifically, the internal gear member 21 is formed to have a cylindrical internal gear having internal teeth formed on the inner peripheral surface thereof, and is integrally connected to the side frame 12 (side frame 13) of the seat back 1. Has been. The external tooth member 22 has a cylindrical external gear having external teeth formed on the outer peripheral surface thereof, and is integrally connected to the side frame 2F (side frame 2F) of the seat cushion 2. Yes. And the outer periphery ring 23 is assembled | attached so that the outer peripheral surface of these both members may be enclosed, and it has the structure which hold | maintains both members in the state piled up in the plate | board thickness direction mutually.

  The rotating shaft 24 is formed in a cylindrical shape and is rotatably supported in a through hole formed in the axial center portion of the internal tooth member 21. As the rotary shaft 24 rotates, the external gear member 22 is rotated to change the meshing position of the external gear of the external gear member 22 along the inner peripheral surface of the internal gear of the internal gear member 21. In this way, a revolving motion with rotation is performed. And with this rotational movement, since the external tooth member 22 and the internal tooth member 21 change a relative rotational position by the difference in the number of teeth of each other, the backrest angle of the seat back 1 is changed.

  Here, the rotating shaft 24 is integrally connected to the rotating shaft 24 of the reclining device 20 on the other side by a connecting shaft 26 in the rotation direction. Thereby, the rotation operation of the rotating shaft 24 is performed in synchronization with the rotating shaft 24 on the other side. Here, the side frames 12 and 13 of the seat back 1 and the side frames 2F and 2F of the seat cushion 2 are provided with through holes through which the connecting shaft 26 can be inserted in the axial direction. It is formed so as to penetrate in the axial direction so as to pass through 24 cylindrical holes.

  Therefore, by inserting the connecting shaft 26 from the outside of the side frame 2F on one side of the seat cushion 2, the connecting shaft 26 can be inserted into the cylinders of both the rotating shafts 24, 24. In addition, when the connecting shaft 26 is inserted into the cylinders of the rotary shafts 24 and 24, the retaining shafts 26 </ b> R and 26 </ b> R are attached to both ends thereof, so that the connecting shaft 26 is detached from the rotary shafts 24 and 24. It is designed to be held so as not to come off.

  Here, serrated serrations are formed on the inner peripheral surfaces of the rotary shafts 24 and 24 in the cylinder. A serrated serration that fits with the serration is formed on the outer peripheral surface of the connecting shaft 26. As a result, the connecting shaft 26 is inserted into the cylinders of the rotary shafts 24 and 24 so that they are fitted together and integrally connected in the rotational direction. The rotating operation of the rotating shafts 24 and 24 described above is performed by rotating the connecting shaft 26 by driving the electric motor 25 directly connected to the connecting shaft 26.

  The electric motor 25 is disposed at a position between the side frames 12 and 13 of the seat back 1, and a connecting shaft 26 is inserted through the electric motor 25. Specifically, the electric motor 25 is disposed adjacent to the side frame 12 shown on the right side in FIG. As shown in FIG. 1, the electric motor 25 is integrally fixed to the side frame 12 by being fixed to a bracket 12 </ b> A extending integrally from the side frame 12. Here, the bracket 12A corresponds to the extending member of the present invention.

  Here, the bracket 12 </ b> A is formed by bending a steel plate into an L shape, and is disposed and formed so as to sandwich the electric motor 25 between the side frame 12. As shown in FIG. 3, the plate portion of the bracket 12A bent so as to sandwich the electric motor 25 is formed with a through hole penetrating in the plate thickness direction, and the above-described connecting shaft 26 is inserted therethrough. Has been. On the other hand, a bracket 13A made of a steel plate is also integrally formed on the left side frame 13 in the figure. The bracket 13A is also formed with a through-hole penetrating in the plate thickness direction, and the connecting shaft 26 is inserted therethrough.

  And between the brackets 12A and 13A described above, a tubular reinforcing member 16 is disposed through which the connecting shaft 26 is inserted. The reinforcing member 16 is formed of a circular steel pipe, and an opening end portion on the right side in the drawing is fitted into a cylindrical bush 12B welded integrally with the bracket 12A and is integrally connected to the bush 12B. . And the opening end part of the left side of the reinforcing member 16 in the drawing is fitted into a cylindrical bush 13B welded integrally with the bracket 13A and is integrally connected to the bush 13B. Here, the bushes 12B and 13B correspond to the guide member of the present invention.

  Further, by providing the reinforcing member 16 that integrally connects the side frames 12 and 13 of the seat back 1 in this manner, the support strength of the back frame 10 assembled in a frame shape is further reinforced. Yes. Specifically, the tubular reinforcing member 16 is arranged and connected so as to extend in the axial direction between the side frames 12 and 13, so that the support strength against the side collision of the entire skeleton of the seat back 1 is increased. Yes.

  Here, as shown in FIG. 3, each bush 12B, 13B is formed in a cylindrical shape in which the connecting end portion with each bracket 12A, 13A projects in a flange shape. And as for these bushes 12B and 13B, the edge part of the reinforcement member 16 is engage | inserted by the outer periphery of those cylindrical parts, respectively. Thereby, the reinforcing member 16 is arrange | positioned as the state aligned with the position on the coaxial center with each rotating shaft 24 and 24 mentioned above.

  Here, the inner peripheral surfaces of both ends of each bush 12B, 13B are formed in a shape that is gently inclined so as to widen the opening shape of each end. As a result, the connecting shaft 26 is guided toward the axial center of the reinforcing member 16 by the inclined surfaces of the open ends of the bushes 12B and 13B, so that the connecting shaft 26 can easily enter the pipe of the reinforcing member 16. ing. As a result, the connecting shaft 26 passes through the pipe of the reinforcing member 16 and is easily inserted in a state where the shaft center is aligned with the cylinder of the rotating shaft 24 ahead.

  Each of the rotating shafts 24, 24 described above is also formed in a shape in which the inner peripheral surfaces of both end portions thereof are gently inclined so as to widen the opening shape of each end portion. As a result, the connecting shaft 26 is guided toward the axis of each rotary shaft 24, 24 by the inclined surface of the opening end portion of each rotary shaft 24, 24 and enters the pipe of each rotary shaft 24, 24. It is easy.

  As shown in FIG. 1, a resin component 17 is assembled to the left end of the reinforcing member 16 in the drawing. The resin component 17 is formed in a shape that fits into the outer peripheral surface of the reinforcing member 16, and is fitted into and attached to the reinforcing member 16 from the lower side in the figure. Thereby, the resin component 17 is arrange | positioned in the state which protruded the shape in the clearance gap of the axial direction between bracket 12A and the electric motor 25, as FIG. 3 shows.

  Accordingly, since the resin component 17 is disposed in the axial gap between the bracket 12A and the electric motor 25, a large lateral load is input to the seat back 1 at the time of a side collision or the like. The deformation of the bracket 12A in the axial direction can be suppressed. Further, since the intervening part is a resin part, the contact with the electric motor 25 is reduced as compared with the case where the iron part is brought into contact with the electric motor 25, and vibration is transmitted from the electric motor 25 to other parts. Can be suppressed.

  As described above, according to the vehicle seat structure of the present embodiment, the connecting shaft 26 is inserted into the pipe of the reinforcing member 16 that reinforces the support strength of the back frame 10, thereby arranging the connecting shaft 26. Is absorbed by the arrangement space of the reinforcing member 16. The reinforcing member 16 is integrally connected to the bracket 12A and the other side frame 13 extending so as to avoid the electric motor 25. Even in the configuration in which the electric motor 25 is disposed, the side frames 12 and 13 can be firmly and integrally connected to each other. Thereby, even if it adds the reinforcement member 16, it can be made to suppress the increase in this installation space small.

  Further, by arranging bushes 12B and 13B having inclined surfaces at the ends in the pipe of the reinforcing member 16, the connecting shaft 26 is inserted into the pipe of the reinforcing member 16 so that the connecting shaft 26 and the rotary shafts 24 and 24 are inserted. It can be guided so as to be inserted in a state where the axes are aligned. Therefore, by inserting the connecting shaft 26 along the pipe of the reinforcing member 16, the connecting shaft 26 can be easily assembled with the rotary shafts 24, 24 so as to be integrated with each other in the rotation direction.

  Although the embodiment of the present invention has been described with one embodiment, the present invention can be implemented in various forms in addition to the above-described embodiment. For example, the reclining device may be configured to connect the side frames of the seat back to the skeleton body integrated with the floor. Further, the reinforcing member may be formed in a square tube shape. Further, the reinforcing member may be directly connected to the bracket or the side frame without using a bush. Moreover, although the bush having an inclined surface has been illustrated as the guide structure set in the reinforcing member, it may be formed by another part assembled in the pipe of the reinforcing member.

1 is a perspective view illustrating a seat structure of a vehicle according to a first embodiment. It is the side view which expanded and showed the arrangement structure of a reinforcing member. It is the III-III sectional view taken on the line of FIG.

Explanation of symbols

1 Seat back 2 Seat cushion 2F Side frame (frame of base member)
10 Back frame 11 Upper frame 12 Side frame (one side frame)
12A Bracket (extension member)
12B Bush (guide member)
13 Side frame (the other side frame)
13A Bracket 13B Bush (guide member)
14, 15 Reinforcement plate 16 Reinforcement member 17 Resin part 20 Reclining device 21 Internal tooth member 22 External tooth member 23 Outer ring 24 Rotating shaft 25 Electric motor 26 Connecting shaft 26R Ring

Claims (4)

A vehicle seat structure in which side frames constituting a skeleton of the seat back are disposed on both sides of the seat back,
The seat back is connected to a skeleton of a base member such as a seat cushion through a reclining device in which each side frame functions as a rotation-retaining device, and a backrest angle is adjustable.
Each of the reclining devices is integrally connected in the rotational direction by a connecting shaft that is inserted through the side frames so that a rotating shaft that adjusts the backrest angle of each other's seat back is inserted.
Between the side frames, an electric motor for rotating the connecting shaft is disposed in an internal position of the seat back adjacent to the one side frame, and is connected to the connecting shaft.
A state I write sandwiched axially between the electric motor is adjacent to the electric motor on one of the side frames which are arranged extending out axially from one of the side frame the said one side frame L shape bent form of prolongation member formed have been provided, et al as a state of being integrally coupled directly inserting the said connecting shaft to the inside between the extension piece and the other side frame A vehicle seat structure, wherein a tubular reinforcing member is integrally coupled to the extension member and the other side frame. The vehicle seat structure according to claim 1,
The connecting shaft is configured to be integrally assembled with each other in the rotational direction by being inserted through the rotational shaft in the axial direction.
The reinforcing member is formed in a circular tube shape, and is arranged and set so that its axis is coaxial with the rotating shaft,
A vehicle seat structure, characterized in that a guide structure is provided in the pipe of the reinforcing member to guide the connecting shaft to be inserted and moved along the axis of the reinforcing member. The vehicle seat structure according to claim 2,
In the guide structure provided in the pipe of the reinforcing member, a guide member having an inclined surface for guiding the insertion movement of the connecting shaft toward the axial center of the reinforcing member is assembled to the opening end of the reinforcing member. A vehicle seat structure characterized by a structure. The vehicle seat structure according to any one of claims 1 to 3,
A vehicle seat structure characterized in that a resin component is provided between the extension member and the electric motor so as to be interposed in the gap in the axial direction.

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