JP2010005069A - Seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat with good operability, which includes a seat cushion which supports buttocks of a seated person, a seat back which is rotatable to the seat cushion while supporting the back of the seated person, and a reclining mechanism which is attached to the seat cushion and the seat back while allowing/restricting rotation of the seat back. <P>SOLUTION: The invention is provided with an intermediate stopper mechanism which works as follows. When the reclining mechanism 59 is unlocked to make the seat back 15 lean forward, at an intermediate-stopper position of the seat back 15 passing the state able to be seated until abutting on the seat cushion 13, the seat back 15 is in the intermediate-stopper state, being restricted from leaning forward further. Also, when the seat back 15 restricted leaning forward at the intermediate stopper-position leans backward, the intermediate-stopper state is released, so as to be in the intermediate-stopper released state for enabling the seat back 15 to lean forward. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a seat cushion that supports a seated person's buttocks, a seat back that is rotatably provided with respect to the seat cushion, and that supports the back of the seated person, and is attached to the seat cushion and the seat back, The present invention relates to a seat having a reclining mechanism that permits / inhibits rotation of the seat back.

In the second sheet of the three-row sheet, there are sheets that can be changed into three states (for example, see Patent Document 1).
(1) A seatable state as shown in FIG.
(2) As shown in FIG. 17B, when the seat back 2 of the seat 1 in a seatable state is tilted forward by operating a lever of a reclining mechanism (not shown), the seat back 1 passes the seatable state. Thus, at the intermediate stopper position until the seat cushion 3 is in contact with the seat cushion 3, further forward tilting of the seat back 2 is prohibited, the seat 1 can be moved forward, and the ease of getting on and off the third row seat is improved. Walk-in state.
(3) As shown in FIG. 17 (c), the seat back 2 at the intermediate stopper position is tilted forward until the seat back 2 comes into contact with the seat cushion 3 by operating an intermediate stopper release lever (not shown), and the back of the seat back 2 is placed on the table. Available table as available.
Japanese Patent No. 3581574

  However, in order to change the seating state shown in FIG. 17 (a) to the walk-in state shown in FIG. 17 (b), it is necessary to operate the release lever of the reclining mechanism, and the table shown in FIG. 17 (c) is used. To make it possible, it is necessary to operate the intermediate stopper release lever.

Since there are two levers, there is a problem of poor operability.
This invention is made | formed in view of the said problem, The subject is providing the sheet | seat with sufficient operativity.

  According to a first aspect of the present invention, there is provided a seat cushion that supports a seated person's buttocks, a seat back that is rotatably provided to the seat cushion and supports a seated person's back, the seat cushion, and the seat back. In a seat having a reclining mechanism that is attached and permits / inhibits rotation of the seat back, when the reclining mechanism is unlocked and the seat back tilts forward, the seat back is past a state in which the seat back can be seated. The intermediate stopper position prohibits further forward tilting of the seat back at the intermediate stopper position until the seat cushion is in contact with the seat cushion, and the seat back where forward tilt is prohibited at the intermediate stopper position When it is tilted, the intermediate stopper state is canceled and the intermediate stopper position of the seat back is exceeded. A sheet comprising the intermediate stopper mechanism comprising an intermediate stopper release state enables Kashiga before the.

  According to a second aspect of the present invention, the intermediate stopper mechanism is provided on the seat cushion, and when the reclining mechanism is unlocked and the seat back is tilted forward, the seat back passes through a state where the seat back can be seated. A stopper plate that is in an intermediate stopper position that is in contact with the seat back and prohibits further forward tilting of the seat back at an intermediate stopper position until the state of contact with the seat cushion, and in the intermediate stopper position And a cancel mechanism that allows the seat back to be tilted forward by moving the stopper plate to release the intermediate stopper state when the seat back whose tilt is prohibited is moved backward. The sheet according to claim 1.

According to a third aspect of the present invention, the intermediate stopper mechanism includes a first protrusion provided at a portion other than the rotation center of the seat back, and is provided rotatably on the seat cushion side. A first stopper surface with which the first protrusion of the seat back can come into contact; a stopper plate having a second protrusion provided at a place other than the rotation center; and a rotation provided on the seat cushion side, A second protrusion of the stopper plate can be contacted, and when contacted, a link provided with a second stopper surface for holding the stopper plate at the intermediate stopper position, and the second protrusion is a second stopper of the link A first urging means for urging the stopper plate in a direction contacting the surface, and a second urging member for urging the link in a direction in which the second stopper surface approaches the stopper plate. And a cancel link provided rotatably on the link and capable of contacting the first protrusion, and a first protrusion of the seat back provided on the link and capable of contacting the cancel link and tilting forward. The cancel that allows the cancel link to be pushed and rotated when pushed by the part, and prohibits the cancel link from being pushed and rotated when pushed by the first protrusion of the seat back that tilts backward. A link stopper, and a third urging means for urging the cancel link in a direction contacting the cancel link stopper;
The sheet according to claim 1, comprising:

  The invention according to claim 4 is the seat according to claim 3, wherein the seatback is provided with a third protrusion that moves the stopper plate in the intermediate stopper released state to the intermediate stopper state by pressing the stopper plate. .

  According to a fifth aspect of the present invention, an elongated hole in which a pin provided on the seat cushion side is loosely fitted is formed on the seat cushion side, one end portion is engaged with the stopper plate, and the other end portion is the seat back. A stopper operation plate that can be pressed against the third projection of the seat back, and the transmission of the force from the third projection of the seat back to the stopper plate is performed via the operation plate in the intermediate stopper release state. 5. The sheet according to claim 4, wherein further rotation of the stopper plate is prohibited by contact between an end of the elongated hole and the pin.

  According to the first to fifth aspects of the present invention, when the reclining mechanism is unlocked and the seat back tilts forward, the seat back passes through the seatable state until the seat back contacts the seat cushion. In the intermediate stopper position, the intermediate stopper state prohibits further forward tilting of the seat back. When the seat back in which the forward tilt is prohibited in the intermediate stopper releasing position is tilted backward, the intermediate stopper state is released. In addition, since the intermediate stopper mechanism for releasing the intermediate stopper that enables the seat back to be tilted forward is provided, a lever for releasing the intermediate stopper is unnecessary, and the operability is good.

Initially, the whole structure of the sheet | seat of this embodiment is demonstrated using FIG. FIG. 1 is a side view of a seat viewed from the outer side (the outside of the vehicle) of the vehicle.
In the figure, the seat 11 includes a seat cushion 13 that supports a seated person's buttocks and a seat back 15 that supports the seated person's back. A seat track 25 is provided which includes a lower rail 21 provided on the floor side and an upper rail 23 provided on the seat cushion 13 side of the seat 11 so as to be movably engaged with the lower rail 21.

  The seat back 15 is provided so as to be rotatable with respect to the seat cushion 13 via a reclining mechanism 59. Reference numeral 57 denotes a lever of the reclining mechanism 59, and the reclining mechanism 59 is unlocked by pulling the end upward, so that the seat back 15 can be tilted forward / backward. Furthermore, in this embodiment, the seat back 15 is urged forward by urging means (not shown).

  Further, the seat track 25 is provided with a lock mechanism (details will be described later) that prohibits the movement of the upper rail 23, and the upper rail 23 can move forward / backward with respect to the lower rail 21 by unlocking the lock mechanism. It becomes.

  Next, the reclining mechanism of this embodiment will be described with reference to FIGS. 2 is an internal configuration diagram of a side surface of the seat viewed from the outer side (outside of the vehicle) of the vehicle, FIG. 3 is an internal configuration diagram of a side surface of the seat viewed from the inner side of the vehicle (inside of the vehicle), and FIG. 5 is a cross-sectional view taken along the section line CC of FIG. 2, FIG. 5 is a cross-sectional view taken along the line EE of FIG. 4, and FIG. 6 is a view with the release plate of FIG.

  In FIG. 2, 41 is a lower arm which is a frame on the seat cushion 13 side, and 43 is an upper arm which is a frame on the seat back 15 side. A reclining mechanism 59 is provided between the lower arm 41 and the upper arm 43 to permit / inhibit rotation of the upper arm 43.

  In FIG. 3, 45 is a lower arm that is a frame on the seat cushion 13 side, and 47 is an upper arm that is a frame on the seat back 15 side. A reclining mechanism 59 ′ is provided between the lower arm 45 and the upper arm 47 to permit / inhibit rotation of the upper arm 47.

  Here, the reclining mechanisms 59 and 59 'will be described with reference to FIGS. Since the outer side reclining mechanism 59 and the inner side reclining mechanism 59 'are the same mechanism, explanation will be given using the reclining mechanism 59, and explanation of the reclining mechanism 59' will be omitted.

In the reclining mechanism 59 of this embodiment, the base plate 100 is attached to the upper arm 43, and the ratchet 130 is attached to the lower arm 41.
A ratchet holding portion 100b that is bent in the direction of the rotation axis of the base plate 100 is formed on the outer peripheral portion of the disc-shaped base plate 100, and is further provided on the outer peripheral portion of the base plate 100 and the outer peripheral portion of the ratchet 130. The disc-shaped base plate 100 and the disc-shaped ratchet 130 are joined together by the metal fitting 206 so as to be relatively rotatable. The ratchet holding portion 100b prohibits movement of the base plate 100 and the ratchet 130 in a direction perpendicular to the rotation axis, and the mounting bracket 206 prohibits movement of the base plate 100 and the ratchet 130 in the rotation axis direction. A hole 101 and a hole 131 are formed in a portion through which the rotation center axis of the base plate 100 and the ratchet 130 passes, and a pin 120 is inserted through the hole 101 and the hole 131.

  A substantially circular recess 132 centering on the rotation center axis of the ratchet 130 is formed on the surface of the ratchet 130 facing the base plate 100, and internal teeth 133 are engraved on the inner peripheral surface of the recess 132.

  A concave portion 104 is also formed on the surface of the base plate 100 facing the concave portion 132 of the ratchet 130, and guide protrusions 105 and 106 project toward the ratchet 130 on the bottom surface of the concave portion 104. The guide protrusions 107 and 108 are projected toward the ratchet 130.

  On the surface of the base plate 100 opposite to the ratchet 130 side, a plurality of coupling protrusions 100a to be attached to the lower arm 41 are arranged at equal intervals on the same circumference centered on the hole 101 (center of the base plate 100). It is installed. On the other hand, on the surface of the ratchet 130 opposite to the base plate 100 side, a plurality of coupling protrusions 130a for attachment to the upper arm 43 are provided on the same circumference centered on the hole 131 (the tilting center of the ratchet 130). They are arranged at intervals.

  The pole 140 is sandwiched between the guide surfaces 105a and 106a of the guide protrusions 105 and 106, and is slidably guided in a direction orthogonal to the rotation center axis of the ratchet 130. The external teeth (engagement portion) 141 at the front end portion are ratchet 130. It is comprised so that it can mesh with the internal tooth (engaged part) 133 of this.

  Similarly, the pole 150 is sandwiched between the guide surfaces 107a and 108a of the guide protrusions 107 and 108, and is slidably guided in a direction orthogonal to the rotation center axis of the ratchet 130, and external teeth (engagement portions) 151 at the front end portion. Is configured to mesh with the internal teeth (engaged portion) 133 of the ratchet 130.

  A cross-sectional oval portion 123 is formed in the intermediate portion of the pin 120, and an oval hole 171 of the cam 170 is fitted in the cross-sectional oval portion 123. For this reason, the cam 170 is fitted to the pin 120 in a relatively non-rotatable state. Further, an operation lever 57 is fixed to an outer side end portion of the pin 120 of the outer side reclining mechanism 59. Also, one end of the connecting pipe 121 is fixed to the inner end of the pin 120 of the outer reclining mechanism 59. The other end of the connecting pipe 121 is fixed to the pin 120 'of the inner reclining mechanism 59'. Therefore, when the operation lever 57 is operated, the pin 120 of the outer side reclining mechanism 59 and the pin 120 'of the inner side reclining mechanism 59' rotate together.

  The cam 170 rotates together with the pin 120, and three pressing portions 174a, 174b, 174c, 175a, 175b, and 175c are formed in the upper portion and in the lower portion. Of the three pressing portions, the back portions 142 and 152 of the poles 140 and 150 are pushed in the direction of the external teeth 141 and 151 with the central pressing portions 174b and 175b, and the external teeth 141 and 151 of the poles 140 and 150 are ratchet. It meshes with 130 internal teeth 133. The remaining pressing portions 174a and 175a and the pressing portions 174c and 175c are set so as to come into contact when the poles 140 and 150 are tilted due to a collision or the like and prohibit further tilting of the poles 140 and 150. Yes.

  In the axial direction of the pin 120 provided along the rotation center axis, the release plate 180 is disposed at a position where the cam 170, the poles 140 and 150, and the guide protrusions 105, 106, 107, and 108 are stacked, and the pin A hole 181 through which 120 is inserted is formed.

  The cam 170 is formed with projections 176 and 177 protruding toward the ratchet 130, and the projections 176 and 177 are formed at the edge of the hole 181 of the release plate 180 and extend in the radial direction. 183 is fitted. For this reason, the cam 170 and the release plate 180 rotate in conjunction with each other.

The release plate 180 is formed with projections 183 and 184 that protrude toward the rotation plane of the ratchet 130 of the poles 140 and 150.
On the other hand, the projections 183 and 184 of the release plate 180 are engaged with a plane parallel to the rotation plane of the ratchet 130 of the poles 140 and 150, and the release plate 180 rotates, whereby the external teeth 141 of the poles 140 and 150 are rotated. , 151 are cam grooves 144, 154 as recesses having side wall surfaces set in a shape for moving the poles 140, 150 in a direction away from the inner teeth 133 of the ratchet 130.

  The inner ends of the spiral springs 191 and 195 are hooked to the hooks 111 and 112 of the base plate 100, the outer ends are hooked to the step portions 178 and 179 of the cam 170, and the cam 170 presses the back surface of the poles 140 and 150. The cam 170 is urged to rotate.

  The operation of the reclining mechanism 59 having the above configuration will be described. Normally, the cam 170 pushes the back surfaces of the poles 140 and 150 due to the urging force of the spiral springs 191 and 195, and the external teeth 141 and 151 of the poles 140 and 150 mesh with the internal teeth 133 of the ratchet 130. ) The rotation of 130 is prohibited (locked state).

  Here, when the operation lever 57 is operated to rotate the pin 120 and the cam 170 is rotated clockwise against the urging force of the spiral springs 191, 195, the cam 170 is moved to the back of the poles 140, 150. As the pressing is released, the projections 183 and 184 of the release plate 180 are guided by the cam grooves 144 and 154 of the poles 140 and 150, and the external teeth 141 and 151 of the poles 140 and 150 are from the internal teeth 133 of the ratchet 130. The poles 140 and 150 move away in the direction away from each other, the meshing between the external teeth 141 and 151 of the poles 140 and 150 and the internal teeth 133 of the ratchet 130 is released, and the ratchet (upper arm 43) 130 can tilt (lock). Released state).

  When the upper arm 43 is tilted to a desired angle, the operation force to the operation lever 57 is released, and the operation force to the pin 120 is released, the urging force of the spiral springs 191 and 195 causes the cam 170 to move to the back of the poles 140 and 150. , The external teeth 141 and 151 of the poles 140 and 150 mesh with the internal teeth 133 of the ratchet 130 again, and the ratchet (upper arm 43) 130 is returned to the state where the rotation is prohibited.

  Next, the intermediate locking mechanism of this embodiment will be described with reference to FIGS. 2, 7, 9, 11, 13, and 15. FIG. 7 is an internal configuration diagram of the side of the seat viewed from the outer side of the vehicle (outside of the vehicle) when the seat back is at the intermediate stopper position, and FIG. 9 is an intermediate stopper mechanism in which the seat back tilts backward from the intermediate stopper position. 11 is an internal configuration diagram of the side surface of the seat viewed from the outer side (outside of the vehicle) when the locked state of the vehicle is released, and FIG. 11 is a table usable state in which the seat back with the intermediate stopper state released is tilted forward. 13 is an internal configuration diagram of the side surface of the seat viewed from the outer side (outside of the vehicle) of the vehicle, FIG. 13 is a view when the seat back is tilted backward from the table usable state, and the intermediate stopper mechanism starts to return. 15 is an internal configuration diagram of the side surface of the seat viewed from the outer side of the vehicle (outside of the vehicle), and FIG. 15 is viewed from the outer side of the vehicle (outside of the vehicle) when the intermediate stopper mechanism is restored from the state of FIG. It is an internal block diagram of a side surface of the over bets.

  As shown in FIG. 2, a first protrusion 251 is formed on the lower edge that is a portion other than the center of rotation of the upper arm 43 on the seat back 15 side. On the other hand, a stopper plate 203 is rotatably provided on the lower arm 41 on the seat cushion 13 side using a pin 205. The stopper plate 203 has an intermediate stopper position (until the reclining mechanism 59 is unlocked and when the seat back 15 tilts forward, the seat back 15 passes through the seatable state until it comes into contact with the seat cushion 13. The first stopper surface 207 with which the first protrusion 251 of the seat back 15 can come into contact with the first stopper surface 207 and the center of rotation It has the 2nd protrusion part 209 provided in places other than (pin 205).

  Further, the lower arm 41 is provided with a stopper operation plate 211 substantially along the vertical direction. An elongated hole 213 is formed in the middle portion of the stopper operation plate 211 in the vertical direction, and a pin 215 provided on the lower arm 41 is loosely fitted in the elongated hole 213. At the lower end of the stopper operation plate 211, a protrusion 217 is formed that loosely fits into a long hole 208 formed in the stopper plate 203. A cut-and-raised portion 219 is formed at the upper end of the stopper operation plate 211.

  A link 221 is rotatably provided on the lower arm 41 using a pin 223. The link 221 can contact the second protrusion 209 of the stopper plate 203. When the link 221 contacts, the stopper plate 203 is held at the intermediate stopper position, and the stopper plate 203 is prohibited from moving to the intermediate stopper release position. Two stopper surfaces 225 are provided.

  The stopper plate 203 is urged by a first urging means (not shown) in the direction in which the second protrusion 209 abuts against the second stopper surface 225 of the link 221 (the direction indicated by the arrow H in FIG. 2).

Further, the link 221 is urged in a direction (arrow I direction) in which the second stopper surface 225 approaches the stopper plate 203 by a second urging means (not shown).
Here, as shown in FIG. 9, the first stopper surface 207 of the stopper plate 203 cannot contact the first protrusion 251 and the seat back 15 is further forward tilted beyond the intermediate stopper position. The intermediate stopper is released. When the stopper plate 203 in the intermediate stopper state rotates counterclockwise in FIG. 2 and rotates to the position shown in FIG. 9 in the intermediate stopper released state, the stopper operation plate 211 moves upward as the stopper plate 203 rotates. The lower end of the long hole 213 comes into contact with the pin 215, and further rotation of the stopper plate 203 is prohibited.

The link 221 is provided with a cancel link 231 with which the first protrusion 251 can come into contact with the pin 233 so as to be rotatable.
Further, the cancel link 231 can be brought into contact with the link 221, and when the first projecting portion 251 of the upper arm (seat back 15) 43 tilting forward is pushed, the cancel link 231 is pushed and rotated. A cancel link stopper 235 that prohibits the cancel link 231 from being pushed and rotated when it is pushed by the first protrusion 251 of the upper arm (seat back 15) 43 that tilts backward is provided.

The cancel link 231 is urged in a direction (a direction indicated by an arrow J in FIG. 2) in contact with the cancel link stopper 235 by a third urging unit (not shown).
The upper arm 43 on the seat back 15 side is formed with a third protrusion 253 that pushes the stopper plate 203 at the intermediate stopper release position and moves it to the intermediate stopper position by pushing the cut and raised portion 219 of the stopper operation plate 211. Has been.

  Next, the walk-in mechanism will be described with reference to FIGS. 3, 8, 10, 12, and 14. FIG. 8 is an internal configuration diagram of the side of the seat viewed from the inner side of the vehicle (inner side of the vehicle) when the seat back is at the intermediate stopper position, and FIG. 10 is an intermediate stopper mechanism in which the seat back is tilted backward from the intermediate stopper position. Fig. 12 is an internal configuration diagram of the side surface of the seat viewed from the inner side (the inside of the vehicle) of the vehicle when the locked state of the vehicle is released. 14 is an internal configuration diagram of the side surface of the seat as seen from the inner side (inside of the vehicle) of the vehicle, FIG. 14 is a view when the seat back is tilted backward from the table usable state, and the intermediate stopper mechanism starts to return. It is an internal block diagram of the side surface of the sheet | seat seen from the inner side (inner side of a vehicle) of a vehicle.

In FIG. 3, a plurality of lock holes 21 a and 21 a ′ are provided on the side surface of the lower rail 21 of the seat track 25 along the moving direction of the upper rail 23.
Here, a lock mechanism that prohibits the movement of the upper rail 23 relative to the lower rail 21 will be described. A bracket 24 is provided at the top of the upper rail 23. A lock lever 26 is provided on the bracket 24 so as to be rotatable about a shaft 29 along the moving direction of the upper rail 23. The lock lever 26 is formed with a lock claw 26a that can be engaged with the hole 24a of the bracket 24, one lock hole 21a of the plurality of lock holes 21a, 21a 'of the lower rail 21, and the hole 23a' of the upper rail 23. Has been. Further, the lock lever 26 is urged in a direction in which the lock claw 26 a is engaged with the lock hole 21 a of the lower rail 21 by urging means (not shown). Therefore, by engaging the lock claw 26a of the lock lever 26 with the hole 24a of the bracket 24, one lock hole 21a of the plurality of lock holes 21a and 21a ′ of the lower rail 21, and the hole 23a ′ of the upper rail 23, The movement of the upper rail 23 is prohibited (locked state). The lock lever 26 is rotated against the urging force of the urging means, and the lock claw 26a is moved to the hole 24a of the bracket 24, one of the plurality of lock holes 21a, 21a ′ of the lower rail 21, and the upper rail 23. Movement of the upper rail 23 with respect to the lower rail 21 is permitted (unlocked state).

  The lower arm 45 is provided with a substantially L-shaped cable link 303. An intermediate portion of the cable link 303 is rotatably provided on the lower arm 45 using a pin 301.

  One rotating end of the cable link 303 is connected to one end of an inner cable 313 of a cable 315 including a tubular outer cable 311 and an inner cable 313 inserted through the outer cable 311. The other end of the inner cable 313 is connected to the lock lever 26.

  The lower arm 45 is formed with a cut-and-raised portion 45a to which one end of the outer cable 311 is attached. Further, the other end portion of the outer cable 311 is attached to a cable attachment portion 24 b formed on the bracket 24.

  The lower arm 45 is provided with a tension spring 321 whose one end is locked to the lower arm 45 and whose other end is locked to the cable link 303. The tension spring 321 is provided such that the rotation center (pin 301) of the cable link 303, one end of the tension spring 321 and the other end are located on the same straight line (l).

  A fourth protrusion 331 is formed at a lower edge portion other than the center of rotation of the upper arm 43 on the seat back 15 side, and the fourth protrusion 331 is inclined forward from a state in which the seat back 15 can be seated. The cable link 303 is pushed to rotate the cable link 303 so that the rotation amount of the cable link 303 is the largest at the intermediate stopper position, and the cable link 303 is set so as to be separated from the cable link 303 that passes the intermediate stopper position. Further, the L-shaped cable link 303 is configured such that when the seat back 15 tilts forward and is pushed by the fourth protrusion 331, the inner cable 313 is rotated in the pulling direction, and the seat back 15 tilts backward and the fourth protrusion 331 When pushed, the inner cable 313 is provided to rotate in the pushing direction.

  In the seatable state, there is no contact between the cable link 303 and the fourth protrusion 331, and the cable link 303 is held at a certain position (hereinafter referred to as a neutral position) by the urging force of the tension spring 321. It has become.

  In this embodiment, the connection between the inner cable 313 and the cable link 303 is configured as shown in FIG. A cylindrical cable end member 317 is attached to the end of the inner cable 313. On the other hand, the cable link 303 includes a substantially L-shaped main body part 305, a standing wall part 307 bent from the main body part 305, and a folded part 309 bent from the standing wall part 307 and facing the main body part 305 through a space. It is made up of. Opposed holes 305a and 309a are formed in the main body portion 305 and the folded portion 309. The diameters of the hole 305a and the hole 309a are set slightly larger than the diameter of the cylindrical cable end member 317.

  Further, the folded portion 309 is formed with a slit 309b that connects the hole 309a and the outside. The width of the slit 309b is set slightly larger than the diameter of the inner cable 313, and the position where the slit 309b is provided is set on the side opposite to the side where the inner cable 313 is routed.

  Then, the cable end member 317 is inserted from the hole 309a of the folded portion 309 into the hole 305a of the main body 305, and the inner cable 313 is inserted into the slit 309b, and then the inner cable 313 is rotated from the solid line position to the two-dot chain line position. Thus, the attachment of the cable link 303 and the inner cable 313 is completed.

Next, the operation of the above configuration will be described.
[Seatable state: FIGS. 2 and 3]
(Outer side)
As shown in FIG. 2, when the seat back (upper arm 43) 15 is in a seatable state, the second protrusion 209 of the stopper plate 203 biased in the arrow H direction and the link biased in the arrow I direction 221 is in contact with the second stopper surface 225.

(Inner side)
As shown in FIG. 3, the cable link 303 is in a neutral position by the urging force of the tension spring 321.

The cable link 303 is in a neutral position, and the locking mechanism of the seat track 25 is in a locked state.
[Intermediate stopper state tilted forward from seatable state: FIGS. 7 and 8]
(Outer side)
In the seatable state, the operating lever 57 of the reclining mechanism 59 is operated (in FIG. 2, the operating lever 57 is pulled up from the two-dot chain line position to the solid line position), the reclining mechanism 59 is unlocked, and the seat back (upper arm 43) Tilt 15 forward.

  As shown in FIG. 7, the first protrusion 251 of the upper arm 43 pushes the cancel link 231, and the cancel link 231 rotates in the direction opposite to the arrow J direction. When the first protrusion 251 moves away from the cancel link 231, the cancel link 231 rotates in the direction of arrow J until it comes into contact with the cancel link stopper 235 by the biasing force of the biasing means (not shown) and returns to the original position.

Further, when the seat back 15 is tilted forward, the first protrusion 251 of the upper arm 43 is positioned on the stopper plate 203 at an intermediate stopper position after the seat back 15 passes the seatable state and comes into contact with the seat cushion 13. A contact with the first stopper surface 207 results in an intermediate stopper state in which further forward tilting of the seat back 15 is prohibited.
(Inner side)
As shown in FIG. 8, when the seat back 15 is tilted forward from the seatable state, the fourth protrusion 331 pushes the cable link 303 to rotate the cable link 303 and pulls the inner cable 313. When the inner cable 313 is pulled, the lock lever 26 is rotated, and the lock claw 26a has a hole 24a in the bracket 24, one lock hole 21a 'among the plurality of lock holes 21a in the lower rail 21, and a hole 23a' in the upper rail 23. The upper rail 23 is allowed to move relative to the lower rail 21 (unlocked state).

Here, when the walk-in is performed, the upper rail 23 is moved forward to improve the ability to get on and off the third row seat.
[Release of locked state of intermediate stopper mechanism: FIGS. 9 and 10]
(Outer side)
As shown in FIG. 9, when the reclining mechanism 59 tilts the seat back 15 in the unlocked state backward, the first protrusion 251 of the upper arm 43 pushes the cancel link 231. At this time, the cancel link 231 is prohibited from rotating by the cancel link stopper 235 and the link 221 rotates in the direction opposite to the arrow I. Then, the contact between the second protrusion 209 of the stopper plate 203 and the second stopper surface 225 of the link 221 is released, the stopper plate 203 rotates in the arrow H direction, and the stopper operation plate 211 moves upward. The stopper plate 203 rotates until the lower end of the elongated hole 213 of the stopper operation plate 211 contacts the pin 215.

By the rotation of the stopper plate 203, the first protrusion 251 of the upper arm 43 can be tilted forward without contacting the first stopper surface 207 of the stopper plate 203 (intermediate stopper release state: intermediate stopper mechanism locked state). Release).
(Inner side)
As shown in FIG. 10, the cable link 303 slightly returns in the neutral position direction, but the inner cable 313 is still pulled, so that the locking mechanism of the seat track 25 is in the unlocked state.
[Table available state: FIGS. 11 and 12]
(Outer side)
As shown in FIG. 11, when the reclining mechanism 59 is tilted forward until the unlocked seat back 15 comes into contact with the seat cushion 13, a table usable state in which the back surface of the seat back 15 can be used as a table is set.
(Inner side)
As shown in FIG. 12, when the seat back 15 is tilted forward until it comes into contact with the seat cushion 13, the fourth protrusion 331 of the upper arm 47 is separated from the cable link 303, and the cable link 303 returns to the neutral position. The lock mechanism 25 is locked.
[Return to seatable position: FIGS. 13, 14, and 15]
(Outer side)
As shown in FIG. 13, when the operation lever 57 of the reclining mechanism 59 is operated to tilt the seat back 15 backward, the third protrusion 253 of the upper arm 43 pushes the cut and raised portion 219 of the stopper operation plate 211, The stopper operation plate 211 moves downward. As the stopper operation plate 211 moves downward, the stopper plate 203 rotates in the direction opposite to the arrow H direction, and as shown in FIG. 15, the second projection 209 of the stopper plate 203 and the biasing direction in the arrow I direction are applied. The second stopper surface 225 of the link 221 thus brought into contact comes into contact.
(Inner side)
As shown in FIG. 14, when the seat back 15 is tilted backward, the fourth protrusion 331 of the upper arm 43 pushes the cable link 303 to rotate the cable link 303. In this case, since the inner cable 313 is pushed by the rotation of the cable link 303, the locking mechanism of the seat track 25 remains in the locked state. And if the 4th protrusion 331 leaves | separates from the cable link 303, the cable link 303 will return to a neutral position.

  According to such a configuration, when the reclining mechanism 59 is unlocked and the seat back 15 is tilted forward, the intermediate stopper between the state in which the seat back 15 passes through the seatable state and the state in which the seat back 15 contacts the seat cushion 13 is provided. When the seat back 15 that is prohibited from forward tilting is moved backward at the intermediate stopper position, the intermediate stopper state is released and the seat back 15 is released. By providing an intermediate stopper mechanism in which the intermediate stopper is released so that it can be tilted forward, a lever for releasing the intermediate stopper is not necessary, and operability is good.

FIG. 3 is a side view of the seat as viewed from the outer side (outside of the vehicle) of the vehicle. It is an internal block diagram of the side surface of the sheet | seat seen from the outer side (outside of the vehicle) of the vehicle. It is an internal block diagram of the side surface of the sheet | seat seen from the inner side (inner side of a vehicle) of a vehicle. FIG. 3 is a cross-sectional view taken along a cutting line CC in FIG. 2. It is sectional drawing in the cutting line EE of FIG. It is the figure which removed the release plate of FIG. It is an internal block diagram of the side of the seat viewed from the outer side (outside of the vehicle) of the vehicle when the seat back is at the intermediate stopper position. It is an internal block diagram of the side of the seat viewed from the inner side (the inside of the vehicle) of the vehicle when the seat back is at the intermediate stopper position. FIG. 5 is an internal configuration diagram of the side surface of the seat as viewed from the outer side (outside of the vehicle) of the vehicle when the seat back is tilted backward from the intermediate stopper position and the locked state of the intermediate stopper mechanism is released. FIG. 5 is an internal configuration diagram of a side surface of a seat viewed from the inner side (the inside of the vehicle) of the vehicle when the seat back is tilted backward from the intermediate stopper position and the locked state of the intermediate stopper mechanism is released. FIG. 3 is an internal configuration diagram of a side surface of a seat viewed from an outer side of the vehicle (outside of the vehicle) when the seat back in which the intermediate stopper state is released tilts forward and enters a table usable state. It is an internal block diagram of the side of the seat viewed from the inner side (the inside of the vehicle) of the vehicle when the seat back released from the intermediate stopper state is tilted forward and the table is ready for use. It is an internal block diagram of the side of the seat viewed from the outer side (outside of the vehicle) of the vehicle when the seat back is tilted backward from the table usable state and the intermediate stopper mechanism starts to return. It is an internal block diagram of the side of the seat viewed from the inner side (the inside of the vehicle) of the vehicle when the seat back is tilted backward from the table usable state and the intermediate stopper mechanism starts to return. FIG. 14 is an internal configuration diagram of the side surface of the seat as viewed from the outer side (outside of the vehicle) of the vehicle when the intermediate stopper mechanism is restored from the state of FIG. 13. It is a perspective view explaining the connection of an inner cable and a cable link. It is a figure explaining a prior art example.

Explanation of symbols

13 Seat cushion 15 Seat back 59 Reclining mechanism

Claims (5)

A seat cushion that supports a seated occupant's buttocks, a seat back that is rotatably provided with respect to the seat cushion, and that is attached to the seat cushion and the seat back, and that rotates the seat back In a seat with a reclining mechanism that permits / prohibits
When the reclining mechanism is unlocked and the seat back is tilted forward, the seat back is past the seatable state and the intermediate stopper position until the seat abuts against the seat cushion. An intermediate stopper state that prohibits forward tilting of
When the seat back whose forward tilting is prohibited at the intermediate stopper position is tilted backward, the intermediate stopper state is released, and further forward tilting of the seat back beyond the intermediate stopper position is possible. A sheet comprising an intermediate stopper mechanism to be in a state. The intermediate stopper mechanism is
Provided in the seat cushion, when the reclining mechanism is unlocked and the seat back is tilted forward, at an intermediate stopper position between the seat back and the state in which the seat back comes into contact with the seat cushion. A stopper plate that is in contact with the seat back and is in an intermediate stopper state that prohibits further forward tilting of the seat back;
A cancellation mechanism that allows the seat back to be tilted forward by moving the stopper plate when the seat back, which is prohibited to tilt forward at the intermediate stopper position, is moved backward, and releasing the intermediate stopper state;
The sheet according to claim 1, comprising: The intermediate stopper mechanism is
A first protrusion provided at a portion other than the rotation center of the seat back;
A second stopper provided at a position other than the first stopper surface, which is provided rotatably on the seat cushion side, and capable of contacting the first protrusion of the seat back at the intermediate stopper position; A stopper plate having
A link provided rotatably on the seat cushion side, the second protrusion of the stopper plate being able to contact, and a second stopper surface for holding the stopper plate at the intermediate stopper position when contacted;
First biasing means for biasing the stopper plate in a direction in which the second protrusion comes into contact with the second stopper surface of the link;
Second urging means for urging the link in a direction in which the second stopper surface approaches the stopper plate;
A cancel link provided rotatably on the link and capable of contacting the first protrusion;
The seat back that is provided on the link and is capable of contacting the cancel link and that is pushed by a first protrusion of the seat back that tilts forward, allows the cancel link to be pushed and rotates, and tilts backward. A cancel link stopper that inhibits the cancel link from being pushed and rotated when pushed by the first protrusion of
Third urging means for urging the cancel link in a direction in contact with the cancel link stopper;
The sheet according to claim 1, comprising: In the seat back,
4. The sheet according to claim 3, further comprising a third protrusion that pushes the stopper plate in the intermediate stopper release state and moves the stopper plate to the intermediate stopper state. On the seat cushion side, a long hole is formed in which the pin provided on the seat cushion side is loosely fitted. One end is engaged with the stopper plate, and the other end is pressed against the third projection of the seat back. Possible stopper operation plate is provided,
Transmission of force from the third protrusion of the seat back to the stopper plate is performed via the operation plate,
5. The sheet according to claim 4, wherein further rotation of the stopper plate in the intermediate stopper release state is prohibited by contact between an end of the elongated hole and the pin.

Images