JP2005104360A - Seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat for a vehicle with improved merchantability by slowly opening a table at the time of using the table. <P>SOLUTION: A table 14 rotatably supported in an accommodation condition along a back face of a seatback and an approximately horizontal full opening condition with a hinge 13 arranged on a lower side LWO as a center and slidable forward and backward is installed to the seatback of a seat for a vehicle. The hinge 13 is equipped with a spring 43 energizing the table 14 in an accommodating direction in a table-accommodating condition, and a energizing the table 14 in a full opening direction of the table 14 in a condition beyond a neutral position balanced with a weight of the table 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a table that can be tilted backward.

The seat employed in a vehicle such as an automobile includes, for example, at least a seat cushion and a seat back supported by the seat cushion, and the back of the seat back has a back of the seat back. A table is provided that is movable in a retracted state along the side and in a fully horizontal open state (for example, Patent Document 1).
Japanese Utility Model Publication No. 6-83462

  However, in such a conventional technique, when the table is fully opened, it is arranged in front of the occupant seated in the rear seat, so when the occupant is moved to the front side by the impact energy at the time of the collision, There is a risk of hitting the rear end of the table, and there is a concern that the impact energy will increase. In addition, such a sense of danger may impair the merchantability of the table.

  The present invention has been made paying attention to such a conventional technique, and provides a vehicle seat provided with a table that has little impact energy applied to an occupant even if it hits.

  In order to solve the conventional technology, the invention according to claim 1 includes at least a seat cushion and a seat back supported by the seat cushion, and the seat back has the seat on the back side. A vehicle seat in which a table that is rotatable in a retracted state and a substantially horizontal fully open state along the back surface of the back is disposed, and a garnish molding having a recess capable of storing the table is disposed on the back surface, Between the side frames constituting the seat back, a center frame having a mounting portion is constructed, and a mounting portion of the hinge of the table is supported by fastening means on the mounting portion of the center frame, The mounted portion can be detached from the mounting portion by a collision load by an occupant applied to the table. And wherein the Rukoto.

  Invention of Claim 2 is a vehicle seat of Claim 1, Comprising: The said to-be-attached part is formed by the dimension which does not penetrate the head of the fastening means of the said attaching part, and the fastening part, An opening portion formed by a dimension penetrating the head of the fastening means of the attachment portion is formed continuously.

  The invention according to claim 3 is the vehicle seat according to claim 1 or 2, wherein the attachment portion is fastened so as to be movable in a direction perpendicular to the axial direction of the fastening means. It is characterized by.

  A fourth aspect of the present invention is the vehicle seat according to any one of the first to third aspects, wherein the attachment portion is a flat plate formed by being attached to the center frame via a bracket. And a projecting portion for reducing the contact area of the mounted portion with the mounting portion at a position sandwiching the screwing member.

  The invention according to claim 5 is the vehicle seat according to claim 4, wherein the convex portion has a smooth surface shape, and the mounted portion is slidable with respect to the mounting portion. To do.

  A sixth aspect of the present invention is the vehicle seat according to any one of the first to fifth aspects, wherein the attachment portion is such that a tool for fastening means does not interfere with the garnish molding. It is characterized by having an oblique shape.

  According to the first aspect of the present invention, the mounting portion of the hinge of the table is supported by the fastening means on the mounting portion of the center frame constructed between the side frames of the seat back, and the mounting portion is Since it can be detached from the mounting portion due to a collision load applied by the occupant applied to the table, even if the occupant hits the table, the impact energy applied to the occupant is small.

  According to the second aspect of the present invention, the mounted portion of the table penetrates the fastening portion formed by a dimension that does not penetrate the head of the fastening means of the mounting portion, and the head of the fastening means of the mounting portion. Since the opening portion formed by the dimensions is formed continuously, if the rear seat occupant hits the table, the mounted portion of the table is displaced, the fastening means moves from the fastening portion to the opening portion, The mounted portion is disengaged from the fastening means of the mounting portion, and the impact energy applied to the occupant is small.

  According to the third aspect of the present invention, since the attaching portion is fastened so as to be movable in a direction perpendicular to the axial direction of the fastening means, if the rear seat occupant hits the table, the attaching portion is attached to the attached portion of the table. On the other hand, it moves in a direction perpendicular to the axial direction of the fastening means, so that the attached portion is disengaged from the fastening means of the attaching portion, and the impact energy applied to the passenger is small.

  According to the fourth aspect of the present invention, the mounting portion is provided with a convex portion at a position sandwiching the screwing member that is mounted to the center frame via the bracket and the fastening means is screwed. The contact area with the mounted portion is reduced, and the mounted portion is easily detached from the mounting portion.

  According to the invention of claim 5, the convex portion has a smooth surface shape, and the attached portion can slide relative to the attaching portion, so that the attaching portion and the attached portion can easily slide. The mounted portion is easily detached from the mounting portion.

  According to the sixth aspect of the present invention, the mounting portion is slanted so that the fastening tool does not interfere with the garnish molding, so that the front and rear dimensions in the seat back are small, and the seated occupant feels uncomfortable. There will be no.

  The purpose of giving less impact energy to the occupant even if it hits the table is realized by the fact that the mounted portion of the table can be detached from the seat back mounting portion by a collision load caused by the occupant applied to the table.

  1 to 6 show a vehicle seat according to an embodiment of the present invention. Reference numeral 1 denotes a vehicle seat which is a front seat. The vehicle seat 1 includes a seat cushion 2 slidable in a front side FR and a rear side RR by a well-known slide device (not shown), and a reclining not shown in the seat cushion 2. A seat back 3 that can be tilted forward and rearward RR about the central axis 5 of the apparatus, and a headrest 4 that is supported by the top portion 3a of the seat back 3 and that is movable substantially vertically and can be tilted forward. It is equipped with. Reference numeral 7 denotes a rear seat disposed on the rear RR of the front seat 1. The rear seat 7 includes a seat cushion 8 fixed to the vehicle body and a seat back 9 also fixed to the vehicle body. .

  The lower half of the front seat 1 excluding both side portions of the seat back 3 has an opening 11 formed through the seat back 3 in the front-rear direction, and the opening 11 can be opened and closed, and the occupant 20 of the rear seat 7 A relaxing seat 12 capable of supporting the lower limbs 20a is rotatably disposed on the rear side RR about the central axis 5. Further, on the rear RR surface of the upper half of the seat back 3, the lower LWO is in a retracted state indicated by a two-dot chain line along the rear surface 3b of the seat back 3 and a substantially horizontal fully opened state indicated by a solid line. A table 14 is provided that is rotatably supported around a hinge 13 disposed in the table and that can slide back and forth in the fully opened state.

  The hinge 13 urges the table 14 in the retracted direction while the table 14 is retracted, and urges the hinge 14 in the fully open direction beyond a neutral position commensurate with the weight of the table 14. A click lock spring 43 that is a “spring” is attached.

  The hinges 13 are symmetrically mounted on the rear side RR of the main frame 31 formed by bridging the side frames (not shown) of the seat back 3, and are symmetrically supported by the hinge brackets 32 and 33. The table hinge 36 is supported by a bolt 35 screwed into a fixed nut 34, and a click lock bracket 37 fixed to the table hinge 36. Between the table hinge 36 and the bolt 35, a flat washer 46, web washers 47 and 48, and a bush 49 are laminated and interposed.

  The table hinge 36 extends from side to side and has through holes 36a and 36a that are formed through the center side in the front and rear direction, and notches 36b and 36b that are also formed through the left and right end parts in the front and back direction. Arm portions 36c and 36c formed to project from the notches 36b and 36b to the rear side RR from the left and right end sides, and left and right through holes 36d and 36d formed in the arm portions 36c and 36c; It becomes more. A stepped bolt 20 that is screwed into a fixed rail 25 of the table 14 described later is inserted into the through holes 36d and 36d via a bush 21 interposed in the through holes 36d and 36d. It is freely rotatable with respect to the holes 36d and 36d.

  The click lock bracket 37 includes a support portion 37a that extends to the left and right and to which the nuts 38 are fixed, and an arm portion 37b that protrudes to the rear side RR from the left and right end portions of the support portion 37a. 37b, through-holes 37c and 37c formed in the left and right sides formed in the arm portions 37b and 37b (the right side 37c is not visible but formed), and formed in the arm portions 37b and 37b. And the bracket 40 having a semi-cylindrical cross section supported by the arm portions 37b and 37b. A pin 41 is inserted through the through holes 37c and 37c of the arm portions 37b and 37b in the left-right direction, and the pin 41 is supported by a push nut 42. A cutout 40 a is formed in the cylindrical portion of the bracket 40, and the click lock spring 43 is inserted and supported by the pin 41. The click lock bracket 37 is screwed into the nuts 38 and 38 by bolts 39 and 39 inserted through the through holes 36a and 36a of the table hinge 36 from the front side FR. It is supported by.

  In the fully open state of the table 14, the click lock spring 43 is fitted into an engaging portion 40 b (which is an engaging portion of the hinge 13) formed as a recess in the bracket 40, so that the fully open state of the table 14 is Retained. Further, by urging a bar 43b (to be described later) of the click lock spring 43 in the lateral direction, the fitting of the click lock spring 43 to the engaging portion 40b can be released.

  The click lock spring 43 includes seven coil portions 43a and 43a, which are inserted into the bracket 40, a substantially C-shaped bar 43b extending from a central portion of the coil portions 43a and 43a, The coil portions 43a and 43a protrude from the end portion side, and are constituted by engaging portions 43c and 43c that can be locked to the notches 37d and 37e to restrict the rotation of the click lock spring 43. The bar 43 b of the click lock spring 43 has an opening angle θ <b> 1 at the upper part toward the coil portions 43 a and 43 a with respect to the center line 44 is 13 degrees. Further, an angle θ2 formed by the engaging portions 43c and 43c with respect to the coil portions 43a and 43a is 90 degrees. The angle θ3 of the click lock spring 43 with respect to the bar 43b when viewed from the left and right directions of the engaging portions 43c and 43c is 102.8 degrees, and the left and right directions of the bar 43b with respect to the vertical line 45 of the coil portions 43a and 43a. The viewed angle θ4 is 85.4 degrees.

  The table 14 includes a fixed rail 25 extending to the rear side RR, a movable rail 26 slidable in the front-rear direction on the fixed rail 25, and a table portion 27 fixed to the movable rail 26. Consists of. The fully open angle of the table 14 is 58.2 degrees. The stoppers 25a and 25a of the fixed rail 25 (the side 25a is not visible) are in contact with the fixed portions 36e and 36e of the table hinge 36, whereby the angle when the table 14 is fully opened is determined. The movable rail 26 has a function of covering the fixed rail 25 and covering the back portion 3b of the seat back 3 when closed (stored). The table portion 27 is fixed to the fixed rail 25 side, and has a cover portion 28a raised in a bank shape so that the inner side cannot be seen from the upper end 22a of the garnish molding 22 that covers the back portion 3b of the seat back 3 at the front end portion. And a mounting portion 29 disposed on the upper side UP of the cover member 28. The mounting portion 29 supports a buffer portion 29a.

  The upper end 22a of the opening of the garnish molding 22 descends to the position of the limit of the insertion angle of a fixing tool (not shown) of the bolt 35 for fixing the hinge 13 to the seat back 3, thereby allowing the rear seat occupant 20 to It is difficult to see. Reference numeral 22 b is a lower end of the opening of the garnish molding 22.

  A plate-like elastic body 23 is interposed between the bar 33 b of the click lock spring 33 and the fixed rail 25 of the table 14. The elastic body 23 has a block shape having a through hole 23a, and a bar 33b of the click lock spring 33 is inserted into the through hole 23a.

  Next, the operation of the vehicle seat 1 will be described.

  A click lock is formed on the hinge 13 when the table 14 is urged in the retracted direction and the table 14 is urged in the fully open direction of the table 14 beyond the neutral position that is in proportion to the weight of the table 14. Since the spring 43 is attached, when the table 14 is in the retracted state, it is biased in the retracting direction by the click lock spring 43, so that no locking means or the like is required, and the cost is reduced accordingly. Further, since the fully open speed corresponding to the forward pulling force against the urging force of the click lock spring 43 up to the neutral position commensurate with the weight of the table 14 can be opened slowly. Further, if the neutral position that is in proportion to the weight of the table 14 is exceeded, the table 14 is biased in the fully open direction, so that it can be smoothly opened fully, and the merchantability of the table 14 can be remarkably improved. .

  When the table 14 is fully opened, the click lock spring 43 is fitted to the engaging portion 40b of the hinge 13, so that the urging force of the click lock spring 43 is not inadvertently applied, and the table 14 is inadvertently moved. There will be no. Further, since the click lock spring 43 can be detached from the engaged state with the engaging portion 40b, it is easy to return the table 14 to the retracted state again, and the convenience is improved.

  Since the engaging portion 40b of the hinge 13 is formed with a recess into which the bar 43b of the click lock spring 43 can be fitted, a separate part is not required and the manufacturing cost is low.

  The click lock spring 43 is a coiled spring composed of coil portions 43a and 43a and bars 43b and 43b extending from the coil portions 43a and 43a. Can give power. Further, since the plate-like elastic body 23 is interposed between the bars 43b and 43b of the click lock spring 43 and the table 14, even if the bars 43b and 43b of the click lock spring 43 move, the table 14 The product quality is improved without strong interference.

  The seat back 3 is supported in a retracted state along the back surface 3b of the seat back 3 and a substantially horizontal fully opened state so as to be rotatable around a hinge 13 disposed on the lower side, and the fully opened state. Therefore, the height of the table 14 in use is appropriate for the occupant 20 seated on the seat cushion 8 of the rear seat 7, and the table portion 27 of the table 14 is used. Can be moved to the front side of the occupant 20 and the usability of the table 14 is remarkably improved.

  Further, the seat back 3 of the lower LWO of the table 14 has an opening 11 that penetrates the seat back 3 back and forth, and an occupant 20 that can freely open and close the opening 11 and is seated on the seat cushion 8 of the rear seat 7. Since the relaxing seat 12 capable of supporting the lower limbs 20a is provided, the passenger 20 sitting on the seat cushion 8 of the rear seat 7 can use the table 14 and the relaxing seat 12 as the seat 1. Convenience is improved.

  Further, the table 14 is fixed to the fixed rail 25 extending from the hinge 13 to the rear side RR, a movable rail 26 slidable in the front-rear direction on the fixed rail 25, and the movable rail 26. Since the cross section of both the fixed rail 25 and the movable rail 26 has a wedge shape, no play occurs and smooth movement is possible.

  Such a seat 1 can be applied not only to automobiles but also to seats of all vehicles such as airplanes, ships, and railways.

The side view of the vehicle seat which shows the relationship with the passenger | crew in the state which moved the table which concerns on one Example of this invention to the back side. The expanded sectional view of FIG. FIG. 3 is an enlarged cross-sectional view corresponding to FIG. 2 when the table shown in FIG. 2 is stored. The disassembled perspective view of the table hinge of FIG. FIG. 5 is a top view of the spring of FIG. 4. The side view of the spring of FIG.

Explanation of symbols

1 Vehicle seat (front seat)
2 Seat cushion 3 Seat back 3b Back of seat back 13 Hinge 14 Table 23 Elastic body 40b Bracket engagement part 43 Click lock spring 43a Coil part of click lock spring 43b Bar of click lock spring

Claims (6)

Comprising at least a seat cushion and a seat back supported by the seat cushion;
On the back side of the seat back is a garnish molding having a table that can be rotated in a retracted state and a substantially horizontal fully open state along the back of the seat back and having a recess that can store the table on the back side. A vehicle seat that is arranged,
Between the side frames constituting the seat back, a center frame having a mounting portion is constructed,
A mounting portion of the hinge of the table is supported by fastening means on the mounting portion of the center frame,
The vehicle seat according to claim 1, wherein the mounted portion is detachable from the mounting portion by a collision load by an occupant applied to the table. The vehicle seat according to claim 1,
The attachment portion includes a fastening portion formed with a dimension that does not penetrate the head of the fastening means of the attachment portion, and an open portion formed with a dimension that penetrates the head of the fastening means of the attachment portion. A vehicle seat characterized by being formed continuously. A vehicle seat according to claim 1 or claim 2,
The mounting seat is fastened so as to be movable in a direction perpendicular to the axial direction of the fastening means. A vehicle seat according to any one of claims 1 to 3,
The mounting portion has a flat plate shape that is mounted on the center frame via a bracket, and a screwing member to which a fastening means is screwed, and a contact area of the mounting portion with the mounting portion at a position sandwiching the screwing member A vehicle seat characterized by being provided with a convex portion for reducing the amount of the vehicle. The vehicle seat according to claim 4,
The vehicle seat according to claim 1, wherein the convex portion has a smooth surface shape, and the mounted portion is slidable with respect to the mounting portion. A vehicle seat according to any one of claims 1 to 5,
The vehicle seat according to claim 1, wherein the attachment portion is slanted so that a tool for fastening means does not interfere with the garnish molding.

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