JP6520532B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. More particularly, the present invention relates to a vehicle seat in which a stopper for restricting the tilt of the seat back by abutting on the seat frame is provided to project in the width direction.

  Conventionally, there is known a vehicle seat in which a seat back is connected to a rear end portion of a seat cushion via a pair of left and right recliners so that the backrest angle can be adjusted (Patent Document 1). Specifically, the lower ends of the side frames on the left and right sides of the seatback are respectively connected to reclining plates connected to the rear ends of the left and right sides of the seat cushion via a recliner. The above-mentioned seat back is configured such that tilting in the front-rear direction can be stopped by the stopper pieces coupled to the outer side portions of the above-mentioned side frames coming into contact with the projections formed on the respective reclining plates. .

JP, 2011-183122, A

  However, in the above-mentioned prior art, in order to stop tilting of a seat back, since a stopper piece as another member is needed, the number of parts will increase. The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to obtain a stopper structure for restricting the tilt of the seat back with a rational configuration.

  In order to solve the above-mentioned subject, the vehicle seat of the present invention takes the following measures.

  The first invention is a vehicle seat provided with a stopper for restricting tilting of the seat back by abutting on the seat frame in the width direction, and the stopper is formed by transferring a part of the seat frame It is

  According to the first aspect of the invention, there is no need to prepare a member other than the seat frame in order to form the stopper on the seat frame. Therefore, the stopper structure which regulates the tilting of the seat back can be obtained with a rational configuration.

  The second invention has the following configuration in the first invention described above. The stopper is formed by drawing a part of the side frame of the seat back in the width direction.

  According to the second aspect of the present invention, the stopper can be formed in a form integrated with the side frame and having high structural strength projecting in a closed cross section. Also, the stopper can be formed integrally with the side frame without being coupled to the side frame.

  The third invention is the following configuration in the first or second invention described above. Stops are formed at central locations leaving both longitudinal locations of the side frame.

  According to the third aspect of the present invention, the stopper can be formed in a shape that is appropriately extended by forming the stopper at the central portion of the side frame that is easily expanded at the time of drawing processing.

  A fourth aspect of the invention is the following configuration in the first aspect of the invention described above. The stopper is formed by cutting and raising a part of the side frame of the seat back in the width direction.

  According to the fourth aspect of the present invention, the stopper can be simply formed integrally with the side frame without being coupled to the side frame.

  The fifth invention has the following configuration in the fourth invention described above. The cut and raised part of the stopper is folded over.

  According to the fifth aspect of the present invention, the stopper can be formed into a simple shape having high structural strength.

FIG. 1 is a perspective view showing a schematic configuration of a vehicle seat of Example 1; It is the perspective view which expanded and represented the structure of the connection part by a recliner. It is the perspective view which looked at FIG. 2 from the back side. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. It is a side view showing the state where tilting of a seat back was stopped by contact of a stopper. FIG. 10 is a perspective view showing a main part structure of a vehicle seat of Example 2; FIG. 7 is a cross-sectional view taken along line VII-VII of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Basic structure of sheet 1>
First, the configuration of the seat 1 (seat for a vehicle) according to the first embodiment will be described with reference to FIGS. 1 to 5. First, the basic configuration of the seat 1 will be described with reference to FIG. In the following description, when “sheet” is attached to various directions such as “sheet width direction” and “sheet height direction”, various directions with respect to the sheet 1 are indicated. Moreover, when showing "the sheet | seat outer side""sheet inner side", the inside in a sheet | seat width direction shall be shown, respectively. Moreover, when showing "the vehicle outer side""vehicle inner side", the inside in the width direction of a vehicle shall be shown, respectively.

  As shown in FIG. 1, the seat 1 of the present embodiment is configured as a left seat of a car. The seat 1 includes a seat back 2 serving as a backrest of a seated person, a seat cushion 3 serving as a seating portion, and a headrest 4 serving as a head rest.

<Seat back 2>
The above-described seat back 2 is connected to the rear end portion of the seat cushion 3 via a pair of left and right electric recliners 20 so that the backrest angle can be adjusted. The respective recliners 20 are always held in a state in which the backrest angle of the seat back 2 is fixed. Each recliner 20 is operated to push the switch 20A provided on the side of the vehicle outer side facing the entrance door (not shown) side of the seat cushion 3 back and forth to correspond the backrest angle of the seat back 2 It is driven to rotate so as to be tilted in the direction.

<Seat cushion 3>
The seat cushion 3 is connected on the floor of the vehicle in a state where the position adjustment can be performed in the front-rear direction via a pair of left and right electric slide rails 5. The slide rails 5 are always held in a state in which the front and rear positions of the seat cushion 3 are fixed. Each slide rail 5 is driven to push the back and forth position of the seat cushion 3 in the corresponding operation direction by an operation of pushing and pulling back and forth the switch 5A provided on the side portion outside the vehicle of the seat cushion 3 It is supposed to be.

<Frame structure of seat back 2>
The seat back 2 mentioned above is specifically considered as the structure by which the back frame 10 which comprises the frame | skeleton was put together in the shape of square-view shape in a plain view. Here, the back frame 10 corresponds to the "seat frame" of the present invention. Specifically, the back frame 10 includes a side frame 11 formed of a pair of left and right elongated steel plates, and an upper frame 12 coupled to be integrally bridged between upper end portions of the side frames 11. The lower panel 13 integrally joined with the lower ends of the side frames 11 is configured to be assembled in a square frame shape in a front view.

  Each of the side frames 11 described above is formed by press-cutting a single steel plate material into a plate shape elongated in the sheet height direction, and arranged so that the faces face each other in the sheet width direction. It has been set up. Each of the side frames 11 has its front and rear edges bent to the inside of the seat to enhance its structural strength against bending and twisting, and has a shape that is rounded so that no edge is erected on the outer periphery. It is done.

  The upper frame 12 is formed by press-cutting one steel plate material into a long plate shape in the sheet width direction, and then bending the whole into an inverted U-shape in a side view. The upper frame 12 is assembled so as to straddle between the upper ends of the side frames 11 described above, and is in a state of being firmly and integrally connected by welding. The lower panel 13 is formed by press-cutting a single steel plate material into a plate shape elongated in the sheet width direction, and straddling from the front side between the rear edges on the lower end side of each side frame 11 described above It is assembled and is in a state of being firmly and integrally connected by welding. The lower panel 13 is disposed in such a manner that the lower panel 13 faces in the sheet longitudinal direction orthogonal to the disposition direction of the side frames 11 by the above-mentioned connection.

  In the seat back 2 having the back frame 10 of the above configuration, the lower ends of the left and right side frames 11 are connected to the left and right rear ends of the seat cushion 3 via the above-described recliners 20. It is connected to the reclining plate 3A. Each reclining plate 3A is provided in a state of being bolted to the left and right rear end portions of a cushion frame (not shown) forming the frame of the seat cushion 3 and firmly and integrally coupled.

  Each reclining plate 3A has a higher structural strength than each side frame 11 of the above-described seat back 2 so that it can strongly support the heavy weight from the lower side through the above-mentioned recliner 20. It is formed of a steel plate material. Since each recliner 20 is coupled to such a thick reclining plate 3A, a high bonding strength between the recliner 20 and the reclining plate 3A is also secured. Therefore, even if a large load such as bending moment is applied to each reclining plate 3A from the seat back 2 via the recliner 20 on each side due to the back load applied to the seat back 2 and various collision loads, these loads are The respective recliners 20 described above and the respective reclining plates 3A coupled thereto are strongly received.

  On the other hand, each side frame 11 of the seat back 2 is thinner than the above-mentioned each reclining plate 3A and has a thickness of 1 mm and a tensile strength of 980 MPa, from the viewpoint of achieving both weight reduction and high strength. It is formed of a tensile steel plate material. With such a configuration, each side frame 11 is configured to be able to strongly receive the backrest load and various collision loads applied to the seat back 2 even if the plate thickness is thin. Specifically, each side frame 11 has a shape in which the longitudinal width thereof gradually increases from the upper end side which is the free end side of each side frame 11 to the lower end side which is the support end side. By being formed, the backrest load applied to the seat back 2 and various collision loads can be strongly received.

  By the way, in each movement for tilting the backrest angle of the seat back 2 in the front and back direction, the stopper 11A formed on each side frame 11 of the seat back 2 is each peripheral edge portion on the front and rear sides of the reclining plate 3A on each side. It is made to stop by contact | abutted to front side latching protrusion 3A1 or back side latching protrusion 3A2 which was formed by protruding to (refer FIG. 5). Each of the stoppers 11A is formed to extend straight integrally from the side frames 11 of the seat back 2 toward the outer side of the seat by drawing.

<Specific configuration of each mechanism>
Hereinafter, the configuration of each side frame 11 of the seat back 2 described above will be described in detail with reference to FIGS. 2 to 5 together with the configuration of peripheral components such as the recliner 20 on each side and the reclining plate 3A. In addition, since these become a pair of symmetrical configuration mutually, below, it shall represent in detail and it demonstrates in detail only about the structure of the one side arrange | positioned on the vehicle outer side.

<Recliner 20>
First, the configuration of the recliner 20 will be described. In addition, since the recliner 20 has a known configuration disclosed in documents such as Japanese Patent Application Laid-Open No. 2011-240758, only the structure of the main part will be briefly described below. As shown in FIGS. 2 to 4, the recliner 20 is disposed between the side frame 11 of the above-described seat back 2 and a reclining plate 3A disposed facing the outside of the seat, They are connected in such a way that they can be rotated relative to one another.

  Specifically, as shown in FIG. 4, the recliner 20 is connected to the external gear 21 connected to the seat outer side of the side frame 11 of the seat back 2 and to the seat inner side of the reclining plate 3A. The outer ring 23 holds the internal gear 22, the external gear 21 and the internal gear 22 axially assembled to each other, and the central portion of the internal gear 22 is rotated to rotate between the external gear 21. It has an operation shaft 24 for operating the assembled rotation stop structure (not shown), and a cap 25 assembled to the side outside the seat of the internal gear 22 to prevent the components of the rotation prevention mechanism (not shown) from falling off It is a structure.

  The external gear 21 and the internal gear 22 are assembled to each other in the axial direction, and are always pressed in the radial direction by the rotation stopper structure (not shown) described above at all times and held in a deep meshing state without backlash It is considered to be in a state of being The external gear 21 and the internal gear 22 are turned in response to the transmission of the rotational output from the drive motor M connected to the central portion of the internal gear 22 through the connecting rod R. Thus, the rotation stop structure (not shown) is pushed in the rotational direction of the operating shaft 24 so as to rotate relative to each other while changing the meshing position of each other.

  When the rotation of the drive motor M is stopped, the external gear 21 and the internal gear 22 are held in a state where they are pressed in a deep meshing state without backlash by the rotation stopping structure (not shown). Upon receiving the transmission of the braking force from the drive motor M, the motor M is held in a strongly stopped state. The drive motor M is bolted to and attached to a side surface portion inside the seat of the side frame 11 outside the vehicle.

<Stopper 11A>
The stopper 11A formed on the side frame 11 described above is drawn to the outside (width direction) of the sheet by drawing at a position slightly higher than the connecting portion of the side frame 11 with the recliner 20, as shown in FIGS. It is formed as an extruded form. As shown in FIG. 5, the stopper 11A is pushed out so as to have a substantially inverted trapezoidal shape in a side view, and the closed cross section parallel to the side surface of the side frame 11 has a substantially inverted trapezoidal shape. It is in the state of being formed in a closed bottomed cylindrical shape of the outer side portion which forms a cross section.

  The stopper 11A has a closed cross section in which the entire circumference is connected to the side frame 11 as described above, and the tip of the stopper 11A is closed with the tip extended to the outside of the seat. It is configured to have high structural strength that can strongly receive the compressive load and bending load received when pressed against the front locking projection 3A1 and the rear locking projection 3A2 of 3A. Specifically, as described above, the stopper 11A has a substantially inverted trapezoidal shape in a side view, so that the side surface 11A1 on the front side and the side surface 11A2 on the rear side are respectively the reclining plate 3A. The front locking projections 3A1 and the rear locking projections 3A2 are formed to be in contact with each other in a straight surface. As a result, the stopper 11A widely disperses the load received when pressed against the front locking projection 3A1 and the rear locking projection 3A2 in the surface direction, and strongly receives the seatback 2 which is a heavy load. It can be done.

<Summary>
Summarizing the above, the seat 1 of the present embodiment is configured as follows. That is, the seat 1 has a configuration in which a stopper 11A that restricts tilting of the seat back 2 by abutting on the back frame 10 (seat frame) is provided so as to protrude in the width direction. The stopper 11 </ b> A is formed by transferring a part of the back frame 10 in a projecting manner by drawing. With such a configuration, it is not necessary to prepare a member other than the back frame 10 in order to form the stopper 11A in the back frame 10. Therefore, the stopper structure which regulates the tilting of the seat back 2 can be obtained with a rational configuration.

  More specifically, the stopper 11A is formed by drawing a part of the side frame 11 of the seat back 2 in the width direction. With such a configuration, the stopper 11A can be formed integrally with the side frame 11 and in a form having high structural strength projecting in a closed cross section. Further, the stopper 11A can be formed integrally with the side frame 11 without being coupled to the side frame 11.

  More specifically, the stoppers 11 </ b> A are formed at central positions that leave both end positions in the front-rear direction of the side frame 11. As described above, by forming the stopper 11A at the central portion of the side frame 11 which is easily expanded at the time of the drawing process, the stopper 11A can be formed to be appropriately extended.

  Then, the structure of the sheet | seat 1 of Example 2 is demonstrated using FIGS. 6-7. In the present embodiment, the stopper 11B protruding from the side frame 11 of the seat back 2 to the outside of the seat is cut and raised so as to be vertically inclined from the side frame 11 to the outside of the seat. The stopper 11B has a shape in which the area of the tip cut and raised from the side frame 11 is further folded downward and doubled in a doubled manner. Thus, the stopper 11B tilts the seat back 2 by applying the front side portion and the rear side portion to the front locking projection 3A1 and the rear locking projection 3A2 of the reclining plate 3A, respectively. Is configured to have a high structural strength capable of firmly locking the

  As described above, the stopper 11B is formed by cutting and raising the part of the side frame 11 of the seat back 2 in the width direction, so that the stopper 11B and the side frame 11 are not combined with each other. It can be easily formed into an integral form. Further, since the cut and raised portion of the stopper 11B is folded, the stopper 11B can be formed into a shape having a simple and high structural strength. The configuration other than the above is the same as the configuration of the seat 1 shown in the first embodiment, so the same reference numerals are given and the description is omitted.

<Other Embodiments>
As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the vehicle seat of the present invention can be widely applied to a vehicle other than a car such as a railway, and a seat provided for various vehicles such as an aircraft and a ship.

  Further, the configuration of the present invention may be applied to a frame of a base installed on a floor such as a seat cushion. Further, the stopper may be any one that protrudes in the width direction from the seat frame and functions, and may protrude inward in addition to the outside in the seat width direction. In addition, the stopper is not limited to those formed by drawing and cutting up from the seat frame, and the seat frame is provided with an extra extending shape portion in advance, and the excess shape portion is bent and formed. You may By doing so, the stopper can be formed without removing the seat frame.

  Specifically, taking the configuration shown in the above-described embodiment as an example, the side frame of the seatback is formed into a shape provided with an extra shaped portion which is extended in the lower side, front and back, right and left beforehand. May be bent to project as a stopper. Alternatively, part of the shape may be cut and raised from the lower panel adjacent to the side frame, and this may be extended as a stopper. In addition, the stopper may be provided so that the other part of the seat frame is cut out and coupled so as to protrude in the width direction.

  Further, in the above embodiment, the configuration of the electric type has been illustrated as the recliner of the present invention, but instead, manual lock and release operation type as disclosed in documents such as Japanese Patent Laid-Open No. 2015-30342 A recliner may be applied. In this case, if a spiral spring is applied between the side frame of the seat back and the reclining plate, which always applies an urging force in the direction of raising the seat back to the front, the diameter of this spiral spring By configuring the outer end of the direction to be hooked to the stopper, more appropriate configuration can be rationalized.

Reference Signs List 1 seat 2 seat back 3 seat cushion 3A reclining plate 3A1 front locking projection 3A2 rear locking projection 4 headrest 5 slide rail 5A switch 10 back frame (seat frame)
11 side frame 11A stopper 11A1 front side surface portion 11A2 rear side surface portion 11B stopper 12 upper frame 13 lower panel 20 recliner 20A switch 21 external gear 22 external gear 23 internal gear 23 peripheral ring 24 operation shaft 25 cap R connecting rod M drive motor

Claims (3)

Before and after tilting the sheet Tobakku stopper for regulating the contact between the contact target is a vehicle seat that is provided protruding from the seat frame in the width direction,
The stopper is formed by drawing in a substantially inverted trapezoidal shape extending in the width direction from the side frame of the seatback, and the front and rear side portions of the extended portion are in direct contact with the contact object vehicle seat that will be the surface shape. A vehicle seat according to claim 1, wherein
It said stopper, a vehicle seat which is formed in the center portion leaving the longitudinal ends portions of the front hexa id frame. The vehicle seat is a vehicle seat in which a stopper for restricting forward and backward tilting of the seat back by contact with the contact object is provided by protruding in the width direction from the seat frame,
Said stopper, said seat back with the cut and raised from the side frame in the width direction, the cut and raised the formed Ru vehicle seat from the shape which is folded to place itself folded shape.

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