JP6056525B2 - Seat back interlocking ottoman device - Google Patents

Description

  The present invention relates to a seat for a vehicle such as an automobile, a train, and an airplane, and in particular, an ottoman provided in front of a seat cushion of a vehicle seat is deployed in conjunction with an angle adjustment of a seat back with respect to the seat cushion. The present invention relates to a seat back interlocking ottoman device that is moved between the position and the storage position.

  Such a vehicle seat back interlocking ottoman device has already been developed (see Patent Document 1 below). This seat back interlocking ottoman device is configured such that when the seat back is tilted backward from the normal use position suitable for sitting, the ottoman moves from the retracted position to the deployed position by the link mechanism. . In this case, the ottoman is stored at a predetermined position in the lower front portion of the seat cushion in the retracted position, and the ottoman supports the leg of the seated occupant from below at a predetermined position in front of the seat cushion in the unfolded position. It is easy to pick.

Japanese Utility Model Publication No. 3-45748

In the seat back interlocking ottoman device of the above-mentioned Patent Document 1, in order to convert the movement of the longitudinally moving member that is operated in the front-rear direction in accordance with the angle adjustment of the seat back with respect to the seat cushion into the rotational movement of the ottoman, The longitudinally moving member and the ottoman are connected via a rotation link. In this case, in order to largely rotate the rotation link with respect to the movement of the longitudinal movement member, the connection point between the rotation link and the longitudinal movement member is on the side close to the rotation center of the rotation link. The connecting point between the ottoman and the ottoman is on the side far from the rotation center of the rotation link. Therefore, a large force is required to rotate the rotation link by the longitudinally moving member, and as a result, there is a problem that a large force is required to tilt the seat back backward.
In view of such a problem, an object of the present invention is to reduce the operation force required for the backward tilting of the seat back that interlocks the ottoman by lengthening the moment arm when the rotation link is rotated by the longitudinal movement member. There is.

In the first aspect of the present invention, the angle of the seat back can be adjusted with respect to the seat cushion, and an ottoman is provided in front of the seat cushion. The ottoman is deployed in the retracted position under the seat cushion and in front of the seat cushion. A pivot link fixed to a predetermined base member so as to be movable between the unfolded position and a longitudinally moving member that is moved in the longitudinal direction in accordance with the angle adjustment of the seat back, The pivot link is a seat back interlocking ottoman device that is pivoted by a longitudinally moving member in accordance with an angle adjustment of the seatback, and is connected so as to transmit this pivoting to the ottoman. A connecting body for connecting the rotating link and transmitting the movements of the two to each other, the connecting body being fixed to be movable in the link length direction of the rotating link; Tobakku is when Ottoman be in the normal use position is in the retracted position, characterized in that it comprises a moving means for moving the connecting member in the counter-rotation center side of the pivot link.
According to the first invention, when the seat back is in the normal use position and the ottoman is in the retracted position, the connecting body is moved to the counter-rotation center side of the rotation link. Compared with the case where the connecting body transmitting to the link is separated from the turning center of the turning link and the connecting body is closer to the turning center of the turning link, the force for turning the turning link by the longitudinal movement member Is small. Therefore, it is possible to reduce the operating force required for the backward tilting of the seat back that interlocks the ottoman.

According to a second aspect of the present invention, in the first aspect of the present invention, biasing means is coupled to the moving member in the path for transmitting the rotation of the rotation link to the ottoman. The moving member is biased so as to move the ottoman toward the deploying position in the state where the ottoman is in the deployed position, and is not configured to be biased when the ottoman is in the retracted position. It is characterized by.
According to the second invention, in a state where the ottoman is on the deployment position side from the retracted position, the moving member in the path for transmitting the rotation of the rotation link to the ottoman is biased toward the deployment side. When the connecting body is movable with respect to the rotation link in the position, and the force for pressing the ottoman from above is weakened, the ottoman can be moved so as to increase the deployment angle by the urging force against the moving member.
As a result, when the unfolding angle of the ottoman in the comfort posture is insufficient, the unfolding angle of the ottoman can be adjusted by adjusting the force for pressing the ottoman from above.
Further, when the deployment angle of the ottoman is increased, the coupling body is moved to the side closer to the pivot center of the pivot link, so that the seat back is in a position inclined backward from the normal use position and the ottoman is deployed. In the position, the force applied on the ottoman is amplified and transmitted to the longitudinal member. Therefore, it is possible to reduce the operating force when returning the seat back in the rearward tilted position to the normal use position by pushing the ottoman down with the legs.
On the other hand, since the moving member is not urged by the urging means in the state where the ottoman is in the retracted position, the movement is not affected when the connecting body is moved by the moving means in the retracted position. Can do.

It is a perspective view showing the appearance of the vehicular seat of one embodiment of the present invention. The schematic diagram of the interlocking operation mechanism of the seat back and ottoman of the said embodiment is shown, and it is a side view in case an ottoman exists in a retracted position state. FIG. 3 is a schematic view similar to FIG. 2, and is a side view when the ottoman is in a deployed position. It is explanatory drawing which shows the front-end part in the schematic diagram of FIG. 3, and shows the operation | movement change in the case of adjusting the expansion | deployment position of an ottoman by a link connection structure. It is an explanatory view of the operation state in the storing position state of the ottoman showing the front end portion in the schematic diagram of FIG. In the Example which actualized the said embodiment, it is explanatory drawing of the seat cushion front-end periphery vicinity which shows the state which inclined the seat back to the predetermined angle. In the said Example, it is explanatory drawing similar to FIG. 6 which shows the state which returned the seat back to the normal use position. It is explanatory drawing which shows the state which returned the seat back to the normal use position similarly to FIG. 7, and the connection body moved below. In the said Example, it is explanatory drawing similar to FIG. 6 which shows the state which inclined the seat back back to the angle exceeding predetermined angle. FIG. 10 is an explanatory view showing a state in which the seat back is locked by a lock mechanism at a position tilted backward to an angle exceeding a predetermined angle, as in FIG. It is explanatory drawing similar to FIG. 6 which shows the state which adjusted the deployment angle of the ottoman in the said Example. It is an expansion explanatory view which extracts and shows the composition around the lock mechanism of the above-mentioned embodiment. It is explanatory drawing for demonstrating the movement state of a coupling body in the said Example. It is an AA line expanded sectional view of FIG.

FIGS. 1-5 shows the structure of the vehicle seat 10 as one Embodiment. As shown in FIG. 1, the vehicle seat 10 is configured as a so-called one-person captain seat arranged in the second row of a vehicle having a three-row seat, and the back of the seated occupant And a seat cushion 18 serving as a seating portion. An ottoman 14 that can be used as a footrest by a seated occupant is disposed at the front portion of the seat cushion 18.
In the present specification, unless otherwise specified, the front-rear direction is the front direction facing the occupant seated on the seat cushion 18 with the seat back 16 as the backrest, and the opposite direction is the rear direction. The direction is the left-right direction, and the vertical direction is the vertical direction.
In FIG. 1, the position change state is indicated by a solid line and a virtual line. The solid line position state indicates the normal use position state in the normal sitting state, and the virtual line position state indicates the comfort posture position state.

  The ottoman 14 is in a retracted position in which it is folded into the front lower portion of the seat cushion 18 when the seat back 16 shown by a solid line is in a standing normal use position where it is used as a backrest. The ottoman 14 moves upward from the normal use position to the rearward tilt position where it is in a comfortable posture, as shown by the phantom line, so that it can be used as a footrest in conjunction with this operation. The deployed position can be switched to the raised position. In this embodiment, it is possible to adjust the position of the ottoman 14 in the deployed state to an arbitrary position in the position indicated by the phantom line. In any deployed position of the ottoman 14 that has been adjusted, the ottoman 14 can be returned to the retracted position in conjunction with the operation of raising the seat back 16 from the rearward tilt position to the normal standing position. It is like that. When the ottoman 14 is returned to the retracted position, when the ottoman 14 is moved back to the deployed position by the interlocking operation with the seat back 16, the ottoman 14 is set to the same deployed position as before the return, and a so-called memory function is activated. It is like that.

  As described above, the vehicle seat 10 of the present embodiment can store and unfold the ottoman 14 in conjunction with the operation of the seat back 16, and can arbitrarily set the position of the ottoman 14 in the unfolded state in conjunction with the operation. In addition, it can be operated in the adjusted position state in conjunction with the seat back 16 to return to the retracted position state, and further, the so-called memory function is activated so that the ottoman is developed again. When operated in conjunction with the position, the usability of the ottoman 14 can be improved, for example, the deployment position is the same as the position before returning.

Hereinafter, the configuration of each part of the vehicle seat 10 will be described in detail.
As shown in FIG. 1, the vehicle seat 10 includes the seat body 12 including the seat back 16 and the seat cushion 18 as described above, and the ottoman 14 is disposed at the front lower portion of the seat cushion 18. The ottoman 14 is pivotally supported with respect to the seat cushion 18 so as to be able to take a storage position indicated by a solid line and a deployed position indicated by an imaginary line.
A headrest 20 that supports the head of a seated occupant is disposed above and below the seat back 16 so as to be movable up and down.
On both the left and right sides of the seat body 12, lateral walls 22 erected in a standing wall shape from the floor are disposed, and the seat body 12 is attached to a base frame 24 </ b> A of a cushion frame 24 described later provided in the lateral walls 22. Connected and supported. The base frame 24A corresponds to a base member in the present invention. In addition, the vehicle seat 10 installed on the floor of the vehicle is installed on the floor via a slide rail (not shown), and is slidable in the front-rear direction. As the slide rail, a known one disclosed in a document such as JP 2010-221935 A can be used. In addition, as for each horizontal wall 22 of the both sides mentioned above, those upper surface parts are set as armrest 22A which a seated passenger | crew can use as an armrest.

The backward tilting operation from the solid line position to the virtual line position with respect to the seat cushion 18 of the seat back 16 shown in FIG. 1 is performed by a recliner (not shown) provided at the connecting portion between the seat cushion 18 and the seat back 16. ing. As the basic structure of the recliner, those disclosed in documents such as Japanese Patent Application Laid-Open No. 2011-116303 can be used, and the specific description thereof is omitted.
The recliner is provided with a lock structure, and the lock structure is released by a lifting operation of a reclining lever (not shown) provided on the side surface of the lateral wall 22 or the like. Since this recliner lever is also always provided with a spring force in a direction in which the recliner is locked, the recliner is unlocked by releasing the recliner lever and the seat back 16 is held in the set position. .

Next, the interlocking operation structure of the seat back 16 and the ottoman 14 will be described with reference to FIGS. The illustrated states of these drawings schematically show the configuration when the vehicle seat 10 is viewed from the side. 2 and 5 show the interlocking positional relationship in which the ottoman 14 is in the retracted position while the seat back 16 is in the normal upright position. FIG. 3 shows the interlocking positional relationship in which the seat back 16 is tilted rearward and the ottoman 14 is in the unfolded position state in the comfort posture position state. FIG. 4 shows an operating state when only the deployed position state of the ottoman 14 is adjusted in the predetermined interlocking position normal state of FIG.
First, a description will be given based on FIG. The cushion frame 24 disposed on the seat cushion 18 includes a base frame 24A and a slide frame 24B. The base frame 24A and the slide frame 24B are arranged in the seating direction and are arranged in parallel. The slide frame 24B is disposed so as to be movable in the front-rear direction as viewed in FIG. 2 with respect to the base frame 24A. For this reason, a long hole-shaped guide hole 50 is formed in the base frame 24A in the front-rear direction, a slide pin 52 is integrally provided in the slide frame 24B, and the slide pin 52 engages with the guide hole 50. By sliding the slide frame 24B, the forward and backward movement of the slide frame 24B is regulated and guided. The slide frame 24B corresponds to the longitudinal movement member in the present invention.
A rear end portion (right end portion in FIG. 2) of the slide frame 24B is rotatably pin-coupled to a lower end portion of the side frame 16A of the seat back 16. The side frame 16A of the seat back 16 is pivotally coupled 46 to a projecting portion 24Aa in which the rear portion of the base frame 24A extends upward, and the seat back 16 extends in the front-rear direction around the 46 pivotal coupling locations. It comes to tilt. Accordingly, when the upper part of the seat back 16 is tilted backward in the comfort posture state, the movement is transmitted to the slide frame 24B as a sliding movement forward by the pin connection 48. Conversely, the movement of the seat back 16 tilting forward from the backward tilt position in the comfort posture state is transmitted to the slide frame 24B as a backward slide movement. Although not shown in the drawings, the above-described recliner is provided at a portion 46 where the side frame 16A of the seatback 16 is pivotally supported by the projecting portion 24Aa of the base frame 24A.
The front end portion (left end portion in FIG. 2) of the slide frame 24B is pivotally coupled 44 to one end of the support frame member 14A of the ottoman 14, and the ottoman 14 is rotatable around the pivot coupling 44. In this state, the seat cushion 18 is disposed at the lower front position. Accordingly, the ottoman 14 also moves back and forth together with the aforementioned back and forth movement of the slide frame 24B. The ottoman 14 is in the retracted position shown in FIG. 2 and is stored in the front lower portion of the seat cushion 18. The unfolded state is the state shown in FIG. 3 and is a position state in which the other end of the ottoman 14 is rotated upward.
The base frame 24A is installed so as to be slidable with respect to the floor via a slide rail (not shown). For this reason, in the present embodiment, the entire vehicle seat is installed to be movable back and forth with respect to the floor. In addition, the cushion pad which comprises the seat part of the seat cushion 18 is mounted with respect to the slide frame 24B. Therefore, the seating surface on the upper surface of the seat cushion 18 is in an integrated state with the slide frame 24B, and moves together in the front-rear direction as the slide frame 24B moves. Therefore, as the seat back 16 tilts backward, the slide frame 24B moves forward, and the seating surface of the seat cushion 18 also moves forward.

A position of the front end portion (left end portion as viewed in FIG. 2) of the base frame 24A and the ottoman 14 is connected by a first link member 26 (corresponding to a rotating link of the present invention). In the first link member 26, two elongated plate-like link members A 28 and B 30 (corresponding to the moving member of the present invention) are connected by a pin coupling 34. One end of the link member A28 is connected to the front end portion of the base frame 24A so as to be relatively rotatable by a pin coupling 32, and the other end is connected to be relatively rotatable by a pin coupling 34 similarly to one end of the link member B30. Yes. The other end of the link member B30 is connected to a substantially center position of the support frame member 14A of the ottoman 14 as shown in FIG.
As shown in FIG. 2, the slide frame 24B is formed with a slide part 24Ba integrally extending downward, as seen in FIG. 2, and the link member A28 of the first link member 26 meets the slide part 24Ba. It is arranged in a position state where position states overlap. In the slide portion 24Ba and the link member A28 disposed in the overlapping position state, long hole-shaped guide holes 38 and 40 are formed in a linear shape, respectively. The arrangement relationship between the guide holes 38 and 40 is such that when the ottoman 14 is in the retracted position shown in FIG. 2, the axes X1 and X2 of the respective guide holes 38 and 40 coincide. Each member is arranged and connected so as to be. Note that the axis of the guide hole 40 formed in the slide part 24Ba is X1, and the axis of the guide hole 38 formed in the link member A28 is X2.
A common linkage pin member 42 (corresponding to the connecting body of the present invention) communicates with and engages with the guide holes 38 and 40. The link pin member 42 is slidable with respect to the guide holes 38 and 40, and the deployment angle of the ottoman 14 is changed by changing the relative positional relationship of the link pin member 42 with respect to the guide holes 38 and 40. Is something that can be done. A lock mechanism (details will be described later) is provided between the linkage pin member 42 and the slide portion 24Ba to fix the engagement position of the linkage pin member 42 with respect to the guide hole 40.

Next, the interlocking operation in the interlocking operation configuration of the seat back 16 and the ottoman 14 will be described with reference to FIGS.
The state of FIG. 2 is a case where the vehicle seat 10 shown in FIG. 1 is in a normal use position state that is a normal seating posture indicated by a solid line, the seat back 16 is in an upright state, and the ottoman 14 is in the seat cushion 18. This is a case where the storage position is stored in the front lower part. In this state, the side frame 16A of the seat back 16 is in a standing state in a state where it is pivotally coupled 46 to the projecting portion 24Aa of the base frame 24A, and the slide frame 24B pin-coupled 48 at the lower end of the side frame 16A is attached. It is in the rear position relative to the base frame 24A. In the position state of both of these 24A and 24B, the engagement relationship between the slide pin 52 provided in the slide frame 24B and the guide hole 50 provided in the base frame 24A is shown in FIG. Seen, it is in a state of being engaged with the rear part.
The operating position state of the slide frame 24B is transmitted to the ottoman 14 that is pivotally coupled 44 at the front end thereof. The position control of the ottoman 14 is performed by being controlled by a first link member 26 formed between the ottoman 14 and the front end portion of the base frame 24A. The link member A28 of the first link member 26 is pivotable by being pin-coupled 32 to the front end portion of the base frame 24A. The pivot pin 42 fixed to the slide part 24Ba of the slide frame 24B by a lock mechanism (not shown) can slide in the direction of the axis X2 in the guide hole 38 provided in the link member A28. Since the slide part 24Ba is moved in the front-rear direction, this is performed. In the state shown in FIG. 2, since the slide part 24Ba, that is, the slide frame 24B is at the rearmost position, the lower end of the other end of the link member A28 is also at the rearmost position. This position state is transmitted to the support frame member 14A of the ottoman 14 that is pin-coupled 36 through the link member B30 that is pin-coupled 34, so that the ottoman 14 is in the retracted position state.

Next, the movement operation from the standing position state of the seat back 16 shown by the solid line shown in FIG. 1 to the comfortable posture state in which the seat back 16 shown by the phantom line tilts backward and the ottoman 14 expands upward is performed. This is done as follows. FIG. 3 shows the operating state in the comfort posture state. As the seat back 16 tilts backward, the side frame 16A of the seat back 16 rotates clockwise about the pivot coupling 46 as a pivot, and slides 24B that is pin-coupled 48 at its lower end slides forward. Let That is, the slide frame 24B slides forward relative to the base frame 24A. In the position state of both 24A and 24B, the engagement relationship between the slide pin 52 provided in the slide frame 24B and the guide hole 50 provided in the base frame 24A is shown in FIG. As seen, it is in a state of being engaged with the front end.
As the slide frame 24B shown in FIG. 3 moves forward, the slide part 24Ba formed integrally therewith also moves forward. Accordingly, the linkage pin member 42 fixed to the slide portion 24Ba causes the link member A28 to rotate clockwise around the position where the pin coupling 32 is connected to the front end of the base frame 24A as viewed in FIG. Then, the lower end of the other end of the link member A28 is moved forward. The movement of the lower end of the link member A28 is transmitted to the support frame member 14A of the ottoman 14 via the link member B30 which is pin-coupled 34, 36, and the ottoman 14 is rotated around the place where the shaft connection 44 is connected to the slide frame 24B. Rotate clockwise as a moving shaft and expand upward. At this time, since the 44 pivot joints of the ottoman 14 also move forward, the ottoman 14 is deployed while the ottoman 14 itself moves forward. When the ottoman 14 is deployed and rotated, the rotation of the link member A28 with the pin coupling 32 as the rotation axis is linked with the forward movement of the linkage pin member 42 so that the linkage pin member 42 links within the guide hole 38 of the link member A28. The sliding is performed in the lower end direction of the member A28. In this manner, in the present embodiment, the interlock operation of the seat back 16 and the ottoman 14 is performed, and the operation from the normal posture state shown in FIG. 2 to the comfortable posture state shown in FIG. 3 is performed. The operation from the comfortable posture state shown in FIG. 3 to the normal posture state shown in FIG. 2 is performed by the reverse operation to the above.

In the present embodiment, in the comfort posture state in which the ottoman 14 is deployed and rotated by the interlocking operation with the rearward tilt of the seat back 16 shown in FIG. 3, the deployed angle state of the ottoman 14 without changing the posture state of the seat back 16. Only the angle can be adjusted according to the preference of the seated person. That is, the relative positional relationship between the seat back and the ottoman in the interlocking operation can be adjusted while the seat back and the ottoman are interlockingly operated. The operation will be described below with reference to FIG.
The deployment angle position indicated by the solid line in FIG. 4 of the ottoman 14 is assumed to be a position Y1 that has been deployed and rotated by the interlocking operation with the seat back 16 in advance. Adjusting the position by rotating the position Y1 to Y2 and Y3 indicated by phantom lines releases the fixation of the linkage pin member 42 to the slide part 24Ba by a lock mechanism (not shown) and forms the slide part 24Ba. This is made possible by the sliding movement of the linking pin member 42 in the guide hole 40 formed. Now, when the ottoman 14 is adjusted to the Y2 rotational position, the linkage pin member 42 is released from the fixing of the slide part 24Ba, and is slid from the position t1 to the position t2 and fixed to the slide part 24Ba again. Similarly, when adjusting to the rotational position of Y3, the fixing position of the linkage pin member 42 with respect to the slide portion 24Ba is similarly moved by moving the guide hole 40 from the position t1 to the position t3. At this time, as the rotation position of the ottoman 14 changes, the engagement position state of the linkage pin member 42 with respect to the guide hole 38 of the link member A 28 also slides and changes.
Thus, even if the position of the linking pin member 42 relative to the slide part 24Ba is changed to change the deployment angle of the ottoman 14, the seat back 16 is returned to the normal posture position, and the ottoman 14 is returned to the retracted position. Regardless of the position of the linkage pin member 42, the position of the ottoman 14 does not change and is in the retracted position. This is shown in FIG. As described above, even if the position of the linking pin member 42 changes to t1, t2, and t3, the guide hole 40 and the link member A28 of the slide portion 24Ba in which the linking pin member 42 is slid and moved in the ottoman 14 retracted position. Since the position overlaps with the guide hole 38, the position of the link member A28 does not change regardless of the position of the linkage pin member 42.

2 to 5 described above, an embodiment of the present invention has been described with reference to schematic diagrams. Hereinafter, an embodiment in which the embodiment is embodied will be described with reference to FIGS. 6 to 11 show only the layout on the plane of each component, and ignore the three-dimensional positional relationship.
FIG. 6 shows the configuration around the ottoman operating portion, that is, the front end portion of the seat cushion when the seat back is tilted backward from the normal use position by a predetermined angle (for example, torso angle = 40 degrees) in the same manner as FIG. Show.
2-5, the linkage pin member 42 is engaged with the guide hole 40 of the slide portion 24Ba. However, in FIG. 6, the linkage pin member 42 is supported by the slider 24Bd, and the slider 24Bd is supported by the slide portion 24Ba. It is slidable along the guide rail 24Bc. Here, the guide rail 24Bc is provided so as to correspond to the guide hole 40 in FIGS.
Further, as shown in an enlarged view in FIG. 12, the linking pin member 42 is also supported by the connecting link 56B, and the connecting link 56B is rotatably coupled to the tip of the ratchet 56A.
6 and 12 show a lock mechanism 54 not shown in FIGS. A memory mechanism 56 is provided adjacent to the lock mechanism 54. The ratchet 56A in FIG. 12 is a part of the memory mechanism 56, and the lock mechanism 54 locks the position of the ratchet 56A of the memory mechanism 56, thereby locking the position of the linkage pin member 42 via the connecting link 56B. become.

As shown in FIG. 12, the lock mechanism 54 is a combination of a cable link 54B, a drive link 54D, a stopper link 54C, and a lock plate 54E. The cable link 54B includes a cable (not shown) that is operated when adjusting the deployment angle of the ottoman, and a cable (not shown) from a reclining lever (not shown) that is operated when adjusting the tilt position of the seat back. Are coupled to the slide portion 24Ba so as to be rotatable around a coupling shaft 54Ba with the drive link 54D. The drive link 54D is integrally coupled to the cable link 54B via the coupling shaft 54Ba, and when the cable link 54B is rotated, the drive link 54D is also rotated integrally. The drive link 54D is configured in a triangular shape, and a connecting shaft 54Ba is provided at one apex of the triangular shape, and a stopper link 54C and a lock are connected to the other two apexes via connecting pins 54Da and 54Db, respectively. The plates 54E are connected so as to be rotatable relative to each other. The stopper link 54C is fixed so as to be rotatable with respect to the slide portion 24Ba around a rotation shaft 54Ca provided at the end thereof, and the lock plate 54E is configured in a triangular shape, and one vertex of the triangular shape is The other two apexes are connected to the connecting pin 54Db and fixed to the slide part 24Ba so as to be rotatable about the rotation shaft 54Ea, and the other is provided with a lock pin 54Eb.
The connecting pins 54Da and 54Db, the lock pin 54Eb, and the coupling shaft 54Ba have their movement ranges restricted by the guide holes 25A, 25B, 25C, and 25D, respectively. The coupling shaft 54Ba only needs to rotate, and in principle, the guide hole 25D may not be provided. However, the connecting pins 54Da, 54Db and the lock pin 54Eb move smoothly in the guide holes 25A, 25B, 25C. A guide hole 25D is provided as a backlash absorption for the purpose.
FIG. 12 shows the connection pins 54Da and 54Db, the lock pin 54Eb, and the connection shaft when a cable (not shown) is pulled to adjust the ottoman's unfolding angle and the cable link 54B is rotated as indicated by the solid line. 54Ba shows the position, and when the cable operation is released and the cable link 54B is returned from the rotating state to the position indicated by the phantom line, the connecting pins 54Da, 54Db, the lock pin 54Eb, and the connecting shaft 54Ba moves to the opposite side of the position shown in FIG. 12 in the guide holes 25A, 25B, 25C, and 25D. The guide holes 25A, 25B, 25C, and 25D are provided in a cover (not shown) that is provided so as to cover the entire slide part 24Ba.

As shown in FIG. 12, when the ottoman 14 is in the retracted position, the tip of the unlocking bracket 54A comes into contact with the connecting pin 54Da. At this time, even when the cable operation is released and the cable link 54B is in the position indicated by the phantom line, the cable link 54B is rotated via the drive link 54D by the connection pin 54Da being pushed by the lock release bracket 54A. It is moved to the position indicated by the solid line. Therefore, when the ottoman 14 is in the retracted position, the lock mechanism 54 is forced to be unlocked regardless of the cable operation. Although not shown, the unlocking bracket 54A is fixed to the base frame 24A (see FIG. 2), and the position does not change regardless of the tilting position of the seat back.
In the state of FIG. 12, the lock pin 54 </ b> Eb of the lock mechanism 54 is not engaged with the gear portion 56 </ b> Aa of the ratchet 56 </ b> A of the memory mechanism 56. For this reason, the lock mechanism 54 does not lock the position of the ratchet 56 </ b> A of the memory mechanism 56.
When the cable operation is released or the ottoman 14 is in the unfolded position, the cable link 54B is in the position indicated by the phantom line, and the links 54D and 54C and the lock plate 54E are rotated, respectively. The lock pin 54Eb meshes with the gear portion 56Aa of the ratchet 56A of the memory mechanism 56, and the lock mechanism 54 locks the position of the ratchet 56A of the memory mechanism 56. As a result, the position of the linkage pin member 42 with respect to the slide part 24Ba is locked.

FIG. 7 shows a state when the seat back is in the normal use position. In the following description, FIGS. 12 and 13 are also referred to for easy understanding.
At this time, the ottoman 14 is set to the storage position, and the lock mechanism 54 does not lock the position of the ratchet 56A of the memory mechanism 56 as described above. Further, the guide hole 38 of the link member A28 and the guide rail 24Bc of the slide portion 24Ba are parallel to each other, and the movement path of the linkage pin member 42 by the guide hole 38 and the movement path of the linkage pin member 42 by the guide rail 24Bc coincide with each other. It is in. On the other hand, between the ratchet 56A and the slide frame 24 B, the tension spring 56Ab (corresponding to the moving means of the present invention) is stretched. Therefore, the ratchet 56A is biased counterclockwise about the rotation shaft 56Ac by the tensile force of the tension spring 56Ab.
As a result, as shown in FIG. 7, when the seat back is in the normal use position and the ottoman 14 is in the retracted position, the linkage pin member 42 is moved from the position of FIGS. 7 and 12 by the tensile force of the tension spring 56Ab. 8 and 13 are moved.
Thus, when the linkage pin member 42 is moved to a position away from the pin coupling 32 of the guide hole 38 of the link member A28, the torque required to rotate the link member A28 by the linkage pin member 42 is reduced. . This is because the moment arm for rotating the link member A28 becomes longer. Therefore, as shown in FIG. 8, from the state where the seat back is set to the normal use position and the ottoman 14 is set to the retracted position, the operation force when moving the ottoman 14 toward the deployed position by tilting the seat back backward is reduced. be able to.

FIG. 9 shows a state in which the seat back is greatly tilted backward (for example, torso angle = 51 degrees) beyond the predetermined angle. At this time, as described above, the slide member 24B (see FIG. 3) and the slide portion 24Ba are moved forward, whereby the link member A28 is rotated clockwise via the linkage pin member 42, and via the link member B30. The ottoman 14 is deployed forward. Further, the support frame member 14A of the ottoman 14 is configured to feed the ottoman 14 forward in FIG. 9 compared to when the ottoman 14 is in the retracted position as shown in FIGS. This is because a mechanism for feeding the ottoman 14 forward is provided in the support frame member 14A as the deployment angle of the ottoman 14 increases. In FIG. 9, the linking pin member 42 is positioned at the upper end of the slide portion 24Ba.
FIG. 10 shows a state in which the operation of tilting the seat back backward is stopped while the seat back is largely tilted rearward as in FIG. At this time, the operation of a reclining lever (not shown) that is operated to tilt the seat back backward is released, and the lock pin 54Eb of the lock mechanism 54 is engaged with the gear portion 56Aa of the ratchet 56A of the memory mechanism 56, so that the lock mechanism 54 locks the position of the ratchet 56 A of the memory mechanism 56.

FIG. 11 shows a state in which only the angle of the ottoman 14 is adjusted without changing the tilting position of the seat back in a state where the seat back is largely tilted rearward as in FIG. In FIG. 11, the configuration of the memory mechanism 56 is shown in a simplified manner.
When the angle of the ottoman 14 is adjusted in this way, the angle of the ottoman 14 is adjusted while the lock mechanism 54 is unlocked by operating the cable (not shown) for operating the lock mechanism 54 as described above. Adjust arbitrarily. The angle adjustment of the ottoman 14 can be performed by adjusting the gravity applied on the ottoman 14 by the legs placed on the ottoman 14.
A tension spring 14B (corresponding to the urging means of the present invention) is stretched between the pivot coupling 44 portion, which is the rotation center of the ottoman 14, and the link member B30, and the ottoman 14 is pulled by the tensile force of the tension spring 14B. Is biased from the retracted position toward the deployed position. As described with reference to FIG. 7, between the ratchet 56A and the slide frame 24 B, the tension spring 56Ab is stretched. The ratchet 56A is biased counterclockwise about the rotation shaft 56Ac by the tensile force of the tension spring 56Ab. Here, the tension spring 14B is set so that the tension force is larger than that of the tension spring 56Ab. As a result, in a state where the lock mechanism 54 is unlocked, the ottoman 14 is urged in the direction of increasing the deployment angle by the tensile force of the tension spring 14B. Therefore, the deployment angle of the ottoman 14 can be adjusted by adjusting the force applied to the ottoman 14 as described above.
When the locked state of the lock mechanism 54 is released in this way and the angle of the ottoman 14 is adjusted, the linkage pin member 42 moves along the guide rail 24Bc, and the linkage pin member 42 in the guide hole 38 of the link member A28 moves. The position changes. That is, the distance between the pin coupling 32 and the linkage pin member 42 changes. As this distance is shorter, the force applied to the link member A28 via the link member B30 is amplified by the principle of “lever” and transmitted to the linkage pin member 42. Therefore, by increasing the deployment angle of the ottoman 14, the force applied from the leg portion on the ottoman 14 can be amplified and transmitted to the slide portion 24Ba, and the seat back is tilted backward to the normal use position. It is possible to reduce the operating force when raising the head.
In addition, the tension spring 14B has a positional relationship in which the link member A28 is not subjected to rotational Mormont due to the tensile force of the tension spring 14B or only slightly when the ottoman 14 is in the retracted position as shown in FIGS. Therefore, the ottoman 14 is not biased toward the deployed position. Therefore, as described with reference to FIG. 8, when the ottoman 14 is in the retracted position, the linkage pin member 42 is moved to a position away from the pin coupling 32 by the tension of the tension spring 56Ab, but the tension spring 14B. The tensile force does not affect the movement.

Next, the memory mechanism 56 will be described.
As shown in FIG. 12, a gear portion 56Aa is provided along a circular arc around the rotation shaft 56Ac at a position away from the rotation shaft 56Ac of the ratchet 56A. Gears are cut on both sides of the inner circumference. As described above, the outer peripheral gear meshes with the lock pin 54Eb of the lock mechanism 54, and the memory plate 56F is provided so as to mesh with the inner peripheral gear. As shown in FIG. 14, the memory plate 56F is engaged with the gear portion 56Aa. As shown in FIG. 14 (A), the memory plate 56F is provided opposite to the gear on the inner peripheral side of the gear portion 56Aa. Moved to a position where the gear (not shown) of the memory plate 56F is engaged and a position where the gears 56Aa are disengaged from each other as shown in FIG. 14B. It is possible. A cam 56C is provided adjacent to the memory plate 56F. When the memory plate 56F is pushed by the cam 56C, the memory plate 56F is moved to a position where it engages with the gear on the inner peripheral side of the gear portion 56Aa. A tension spring 56Fa is stretched between the memory plate 56F and the rotation shaft 56Ac of the ratchet 56A. When the memory plate 56F is not pushed by the cam 56C, the memory plate 56F is separated from the gear on the inner peripheral side of the gear portion 56Aa. Yes.
A stopper 56D and a guide 56E are provided at positions corresponding to both ends of the memory plate 56F, respectively, and the stopper 56D regulates a range in which the memory plate 56F moves along the arc shape together with the gear portion 56Aa. The guide 56E allows the memory plate 56F to move along the arc shape when the memory plate 56F is engaged with the gear on the inner peripheral side of the gear portion 56Aa, and the memory plate 56F is allowed to move along the inner peripheral side of the gear portion 56Aa. When moving away from the head, movement along the arc shape is restricted. Accordingly, the stopper 56D and the guide 56E prevent the memory plate 56F that is not engaged with the gear on the inner peripheral side of the gear portion 56Aa from moving in any of the front and rear directions along the arc shape of the gear portion 56Aa. The memory plate 56F engaged with the gear on the inner peripheral side is moved along the guide 56E together with the gear portion 56Aa of the ratchet 56A, but is not moved forward from the stopper 56D. The stopper 56D and the guide 56E are formed on the inner wall of the cover (not shown) of the slide part 24Ba.
The cam 56C is coupled to the cable 58, and when a reclining lever (not shown) operated to adjust the tilting position of the seat back is operated, the cable 58 pulls the cam 56C as shown in FIG. Then, the cam 56C is rotated around the rotation shaft 56Cb. At this time, the cam 56C pushes the memory plate 56F to move it to a position where it engages with the gear on the inner peripheral side of the gear portion 56Aa. When the operation of the reclining lever (not shown) is released, the cable 58 is returned, the cam 56C is pulled and rotated by the tension spring 56Ca, the pressure of the memory plate 56F is released, and the memory plate 56F is the gear portion 56Aa. Move away from the gear on the inner circumference of the.

Next, the operation of the memory mechanism 56 will be described.
With the seat back tilted backward from the normal use position and the ottoman 14 in the deployed position, the lock mechanism 54 is unlocked by operating a cable (not shown), and the deployment angle of the ottoman 14 is arbitrarily set as described above. When the angle is adjusted, the linking pin member 42 is moved to a position corresponding to the deployment angle of the ottoman 14. At this time, the ratchet 56A connected to the linkage pin member 42 is also moved together with the gear portion 56Aa. That is, the gear portion 56Aa is moved along the lower surface of the guide 56E. On the other hand, when the reclining lever (not shown) is not operated, the cam 56C does not push the memory plate 56F, so that the memory plate 56F is separated from the meshing state with the gear portion 56Aa, and the gear portion 56Aa Even if it moves along the lower surface, the memory plate 56F is stopped by the guide 56E and does not move together with the gear portion 56Aa.
When the adjustment of the deployment angle of the ottoman 14 is completed and the operation of the cable (not shown) is released, the lock pin 54Eb of the lock mechanism 54 meshes with the gear on the outer peripheral side of the gear portion 56Aa to lock the deployment angle of the ottoman 14. .
Thereafter, when the seat back is returned to the normal use position or the rearward tilt angle of the seat back is changed, when the reclining lever (not shown) is operated, the cable 58 is pulled and the cam 56C is rotated. Since the memory plate 56F is in a position to mesh with the gear portion 56Aa, the memory plate 56A moves when the ratchet 56A moves with the change in the deployment angle of the ottoman 14 even if the lock mechanism 54 is unlocked in accordance with the operation of the reclining lever. 56F also moves together, and the position of the ottoman 14 that has been adjusted last time is stored and maintained as the deployment angle position of the ottoman 14 that accompanies the backward tilt of the seat back.
As described above, when the ottoman 14 is in the retracted position with the seat back in the normal use position, the lock mechanism 54 is unlocked, so that the linking pin member 42 moves downward along the guide hole 38 and the ratchet 56A also rotates and the gear portion 56Aa moves to the lower part of the guide 56E. At this time, since the gear portion 56Aa moves together with the memory plate 56F, the unfolded angle of the ottoman 14 adjusted as described above can be stored. Therefore, in this state, even if the lock mechanism 54 is unlocked, the storage of the ottoman's deployment angle position is not released. Therefore, when the reclining lever is operated to tilt the seat back backward, the link member A28 is pushed by the linkage pin member 42 and the ottoman 14 is moved from the retracted position to the deployed position. Overcomes the urging force of the tension spring 56Ab, expands the ottoman 14 by adjusting the gravity of the leg as described above, and the deployment angle is determined at the position where the end of the memory plate 56F contacts the stopper 56D. The expansion angle is an angle stored by the memory plate 56F meshing with the gear portion 56Aa as described above, and the expansion angle of the ottoman 14 is set to the angle stored in the memory mechanism 56.
Note that the unfolding operation of the ottoman 14 is stopped at the position where the end portion of the memory plate 56F is in contact with the stopper 56D, but the rearward tilting operation of the seat back can be continued even in this state.

As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example,
1. As the moving means of the connecting body that connects the rotating link and the longitudinally moving member, an electric moving means such as a motor may be used.
2. The moving member in the path for transmitting the rotation of the rotation link to the ottoman may be any of a rotation link, a connecting body, an ottoman, and a member connected to the rotation link and the ottoman. Any one of those moving members may be used, or may be performed on a plurality of moving members.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat body 14 Ottoman 14A Support frame member 14B Tension spring (biasing means)
16 Seatback 16A Side frame 18 Seat cushion 20 Headrest 22 Side wall 24 Cushion frame 24A Base frame (base member)
24Aa Projection site 24Ab Bracket 24B Slide frame (back and forth member)
24Ba slide part (second link member)
24Bc guide rail 24Bd slider 25A, 25B, 25C guide hole 26 first link member (rotating link)
28 Link member A
30 Link member B (moving member)
32 pin connection (second rotary shaft)
34, 36 Pin coupling 38 Guide hole 40 Guide hole 42 Linking pin member (connector)
44 Axle connection (first rotary shaft)
46 Axis connection 46A Reclining mechanism 48 Pin connection 50 Guide hole 52 Slide pin 54 Lock mechanism 54A Lock release bracket 54B Cable link 54Ba Connection shaft 54C Stopper link 54Ca Rotation shaft 54D Drive link 54Da, 54Db Connection pin 54E Lock plate 54Ea Rotation Shaft 54Eb Lock pin 56 Memory mechanism 56A Ratchet 56Aa Gear part 56Ab Tension spring (moving means)
56Ac rotating shaft 56B connecting link 56C cam 56Ca tension spring 56Cb rotating shaft 56D stopper 56E guide 56F memory plate 56Fa tension spring 58 cable X1 axis of guide hole 40 X2 axis of guide hole 38

Claims (4)

The seat back angle can be adjusted with respect to the seat cushion.
An ottoman is provided in front of the seat cushion, the ottoman being movable between a retracted position under the seat cushion and a deployed position deployed in front of the seat cushion,
A rotation link fixed to a predetermined base member so as to be rotatable, and a longitudinal movement member that is moved in the front-rear direction in accordance with the angle adjustment of the seat back,
The pivot link is a seat back interlocking ottoman device that is pivoted by a longitudinally moving member according to the angle adjustment of the seat back, and is coupled to transmit the pivot to the ottoman.
By connecting the pivot link and the forward-rearward movement member, a connecting member for transmitting the movement of both mutually,
A ratchet for adjustable deployment angle of the ottoman independently of the angular adjustment of the seat back by the connecting member movably fixed to the link length direction of the pivot link, to move the fixed position,
A lock mechanism capable of locking the adjustment position of the ratchet;
When the ottoman is in the retracted position there seat back in the normal use position, the seat back interlocked ottoman device characterized by comprising a moving means for moving the connecting member in the counter-rotation center side of the pivot link . In claim 1,
A moving member is provided in a path for transmitting the rotation of the rotating link to the ottoman , and the moving member is coupled to the urging means and constantly urges the ottoman at the unfolded position to the unfolded side and is at the retracted position. seat back interlocked ottoman apparatus urging force in the ottoman is characterized that you suppressed.   In claim 2,
  The seat back interlocking ottoman device, wherein the moving means is a tension spring.   In claim 3,
  2. The seat back interlocking ottoman device according to claim 1, wherein the biasing means is a tension spring, and the tension force is larger than that of the tension spring constituting the moving means.

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