JP3898089B2 - Vehicle seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat such as an automobile, a ship, an aircraft, and a railway vehicle.
[0002]
[Prior art]
As shown in FIGS. 7 and 8, the seat device 1 for this type of vehicle includes a base frame 12 supported on a leg base (not shown), and front and rear of the seat device 1 supported on the base frame 12. The seat cushion 2 is slidable in the direction, and the seat is erected on the base frame 12 on the rear end side of the seat cushion 2 and is pivotally supported by the support shaft 20 so as to be tiltable in the front-rear direction of the seat device 1 And a back 3.
[0003]
The support shaft 20 is formed on the back frame 21 of the seat back 3, and an arm bracket 32 is suspended from the lower LWR of the support shaft 20. The cushion frame 31 of the seat cushion 2 is formed by bridging a support frame 49 in the left-right direction at a substantially central portion in the front-rear direction. On the rear end side of the cushion frame 31, a support bracket 42 is extended and supported in the front-rear direction. First and second links pivotally supported by first and second pins 13 and 14 via a first link bracket 10 on a lower end portion 32a of the arm bracket 32 and a rear end portion 12a of the base frame 12, respectively. The free end portions 35 a and 37 a of the support brackets 35 and 37 are pivotally supported by the third pin 39 in the front and rear elongated holes 44 of the support bracket 42.
[0004]
Reference numeral 40 denotes a seat surface slide rotation collar that is pivotally supported by the third pin 39 and is slidable back and forth within the front and rear long hole 44. Reference numeral 41 denotes a slider supported by the base frame 12, which is supported by the cushion frame 31 so as to be slidable back and forth.
[0005]
A fifth pin 54 is freely movable in a long hole 48a of an upper end portion 48b of a rotating arm 48 rotatably supported by a front end portion 12b of the base frame 12 via a second link bracket 47 and a fourth pin 51. It is pivotally supported and rotatably supported by the support frame 49 via the third link 61. A lower end portion 48 c of the rotating arm 48 is rotatably supported by a fluid actuator 53 by a sixth pin 55. The fluid type actuator 53 is rotatably supported by a seventh pin 58 via an actuator bracket 56 and an actuator second bracket 52 on the rear end portion 12a of the base frame 12, and is in a locked state in a telescopic position. Release is possible (see Japanese Patent Application Laid-Open No. 9-103333 as a similar technique).
[0006]
[Problems to be solved by the invention]
However, in such a conventional technique, as shown in FIG. 7, even when the seat back 3 is in the foremost tilted position and the seat cushion 2 is in the rearmost position, as shown in FIG. 3 is the foremost tilt position, and even when the seat cushion 2 is in the rearmost position, there is a gap between the lower side of the cushion frame 31 and the first link 35. However, as shown in FIG. When the seat cushion 2 is in the rearmost position, the lower side of the cushion frame 31 and the first link 35 interfere with each other, and the cushion frame 31 does not swing any more.
[0007]
Therefore, the present invention has been made paying attention to such a conventional technique, and provides a vehicle seat in which the swing angle of the seat cushion is increased even when the inclination of the seat back is small.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a base frame supported on a leg stand, a seat cushion supported on the base frame and slidable in the front-rear direction, and the base frame on the rear end side of the seat cushion. A seat back that is erected on and supported by a support shaft so as to be tiltable in the front-rear direction, and an arm bracket is suspended below the support shaft of the back frame of the seat back, and the seat cushion A support frame is bridged in the left-right direction at a substantially central part in the front-rear direction of the cushion frame, and a support bracket extends in the front-rear direction on the rear end side to be supported. lower end a first link the rear end is pivotally supported in part, in the forward position of the rear end of the first link of the rear end of the base frame A second link pivotally supported, is provided, these first, become respective free end portions of the second link is pivotally supported in the front and rear long hole of the support bracket, the front end of the base frame An upper end portion of a rotating arm that is rotatably supported is rotatably supported on the support frame, and a lower end portion of the rotating arm is rotatably supported on a fluid actuator, the fluid actuator Is a vehicle seat that is rotatably supported by the rear end portion of the base frame and that can be locked and unlocked in the telescopic position. The first link is the rear end of the base frame. The upper end of an I-shaped fourth link whose lower end is pivotally supported at a position behind the lower end of the second link, and the front end is pivotally supported on the upper end of the second link. I-shaped first A front end of the sixth link with the rear end of the link, the front end portion of the sixth link I-shaped rear end to the lower end portion is formed by pivotally supported in the arm bracket, formed by rotatably supported The fifth link and the sixth link are arranged in a V shape with the portion inclined downward .
[0009]
According to the first aspect of the present invention, the first link is arranged in a V shape between the fifth link and the sixth link, and the portion pivotally supported by the fourth link can move, so the inclination of the seat back Even if is small, the swing angle of the seat cushion is increased because the cushion frame and the sixth link do not interfere with each other. Further, as the link ratio setting range is widened, the cushion frame can be swung even with a narrow reclining angle.
[0010]
According to a second aspect of the present invention, there is provided a base frame supported on a leg base, a seat cushion supported on the base frame and slidable in the front-rear direction, and the base frame on the rear end side of the seat cushion. A seat back that is erected on and supported by a support shaft so as to be tiltable in the front-rear direction, and an arm bracket is suspended below the support shaft of the back frame of the seat back, and the seat cushion A support frame is bridged in the left-right direction at a substantially central part in the front-rear direction of the cushion frame, and a support bracket extends in the front-rear direction on the rear end side to be supported. lower a first link the rear end is pivotally supported in part, in the forward position of the rear end of the first link of the rear end of the base frame There is provided a second link pivotally supported, is, they first, each of the free ends portions of the second link, it is pivotally supported by the front and rear long hole of the support bracket, the front end of the base frame An upper end portion of a rotating arm that is rotatably supported by a portion is rotatably supported by the support frame, and a lower end portion of the rotating arm is rotatably supported by a fluid actuator. In the vehicle seat in which the actuator is rotatably supported at the rear end portion of the base frame, and the telescopic position is locked and released, the first link is provided on the arm bracket. The lower end portion is pivotally supported at a position rearward of the lower end portion of the second link among the rear end portion of the I-shaped seventh link having the rear end portion pivotally supported by the lower end portion and the rear end portion of the base frame. Become A rear end portion of an I-shaped fifth link, which is rotatably supported by an upper end portion of a letter-shaped eighth link and a front end portion is pivotally supported by the upper end portion of the second link. It is pivotally supported by the middle part of the eight links and the front end part of the seventh link is inclined downward.
[0011]
According to the second aspect of the invention, the first link includes the fifth link, the seventh link, and the eighth link, and the front end portion of the seventh link is inclined downward, so that the seat back is inclined. Even if is small, the swing angle of the seat cushion increases because the cushion frame and the seventh link do not interfere with each other. Further, as the link ratio setting range is widened, the cushion frame can be swung even with a narrow reclining angle.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings. In the following description, FR is the front side, RR is the rear side, UP is the upper side, and LWR is the lower side.
[0013]
FIGS. 1 to 5 show a first embodiment of the present invention. Reference numeral 1 denotes an automobile seat device for a “vehicle”, which is not shown, as well as a seat cushion 2 on which an unillustrated occupant can be seated. The seat back 3 is configured at least by which a passenger can lean. “At least configured” means, in addition to this, a reclining device that can control the inclination of the seat back 3 in the front FR or rear RR direction with respect to the seat cushion 2, and is supported by the upper end of the seat back 3. This is because there are a large number of structural members such as a headrest.
[0014]
The seat cushion 2 includes a closed loop base frame 12 supported on a leg base 11 mounted on a floor surface of a passenger compartment (not shown), and the front FR or rear RR direction supported on the base frame 12 A closed-loop cushion frame 31 that is slidable on the rear side, a bracket 16 (see FIG. 1) formed so as to protrude from the rear RR portion of the base frame 12 toward the seat back 3, and a front side from the bracket 16 The armrest 17 is formed so as to protrude from the FR.
[0015]
The seat back 3 includes a back frame 21 that is erected on the base frame 12 at the rear RR end of the seat cushion 2 and is pivotally supported by a support shaft 20 so as to be tiltable in the front-rear direction. A hinge bracket 23 is suspended from a lower LWR of the support shaft 20 of the frame 21. The support shaft 20 is supported by the rear end of the bracket 16 and the armrest 17 of the base frame 12. One end of an actuator 25 (see FIG. 1) such as a fluid pressure cylinder for tilting the seat back 3 back and forth is connected to the lower end 23a of the hinge bracket 23. The other end of the actuator 25 is connected to the base frame 12.
[0016]
The actuator 25 is connected to a lock release button 27 disposed on the armrest 17 by a wire cable 26 that houses an inner cable for unlocking the actuator 25. By pressing the lock release button 27, the actuator 25 is locked. The state is released, and it is configured to return to the locked state by releasing the press.
[0017]
The cushion frame 31 of the seat cushion 2 has a support frame 49 extending in the left-right direction and bridged at a substantially central portion in the front-rear direction, and support brackets 42, 42 on the rear end side of the cushion frame 31. It is extended and supported in the front-rear direction.
[0018]
Arm brackets 32, 32 are suspended from the back frame 21 at the center side of the hinge bracket 23. Reference numeral 37 is an I-shaped second link, and the second link 37 protrudes from the end 12a of the rear side RR of the base frame 12 to the front side FR and is supported by the end 12a. The lower end portion of the front end portion 10 is rotatably supported by the second pin 14. Reference numeral 35 denotes a first link, and the first link 35 is an upper end of an I-shaped fourth link 36 having a lower end pivotally supported by a ninth pin 34 in the middle of the first link bracket 10. A rear end portion of an I-shaped fifth link 38 in which a front end portion 38a is rotatably supported by a third pin 39 on an upper end portion 37a of the second link 37, and a lower end portion of the arm bracket 32 A fifth end of the I-shaped sixth link 65, the rear end of which is rotatably supported by the first pin 13, is rotatably supported by the eighth pin 33 and the fifth link. 38 and the sixth link 65 are arranged in a V shape. The free ends 37 a and 38 a of the second and fifth links 37 and 38 are pivotally supported by a third pin 39 in the front and rear elongated holes 44 of the support bracket 42. A bearing surface slide rotary collar 40 is rotatably supported on the third pin 39 so that it can slide back and forth in the longitudinal slot 44 of the support bracket 42. The front and rear long holes 44 are open at the rear end.
[0019]
A rotating arm 48 is pivotally supported by a fourth pin 51 on the second link bracket 47 which protrudes from the end portion 12b of the front side FR of the base frame 12 to the rear side RR and is supported by the end portion 12b. Being done. The pivot arm 48 is I-shaped, and a long hole 48a is formed in the upper end portion thereof. The fifth pin 54 pivotally supported in the long hole 48a is supported by the cushion frame 31. It is rotatably supported by a third link 61 that is rotatably supported by the frame 49. A fluid type actuator 53 is rotatably supported by a sixth pin 55 at the lower end of the rotating arm 48.
[0020]
The fluid type actuator 53 is connected to an actuator second bracket 52 that is rotatably supported by a seventh pin 58 with respect to the actuator bracket 56 protruding toward the front side FR at the end portion 12a of the rear side RR of the base frame 12. It is supported. In addition, the fluid actuator 53 can be locked and unlocked at the telescopic position. That is, the wire cable 59 that houses the inner cable for unlocking is connected to the unlock button 60 arranged on the upper side surface of the armrest 17, and by pressing the unlock button 60, the fluid actuator 53 The locked state is released, and the locked state is restored by releasing the press.
[0021]
Reference numerals 41 and 41 are a pair of left and right sliders fixed to the upper surface of the end portion of the front side FR of the base frame 12, and the cushion frame 31 is guided to be slidable in the front-rear direction. The slider 41 includes a guide plate portion 41a having a circular cross section, and left and right side plate portions 41b provided upright on both sides of the guide plate portion 41a. The left and right side plate portions 41b extend in the left and right direction of the cushion frame 31. Restricts movement.
[0022]
Reference numeral 57 denotes a tension spring, which is suspended between the third pin 39 of the second link 37 and the fifth link 38 and the rear end portion 12a of the base frame 12, and is attached to the tension spring 57. The seat back 3 is configured to maintain a neutral state that is substantially erected by a link mechanism including the second link 37 and the fifth link 38 by the force.
[0023]
Next, the operation according to this embodiment will be described.
[0024]
As shown in FIG. 1, it is assumed that the seat back 3 is in a neutral state in which the seat back 3 is substantially upright. When the seated person sits on the seat cushion 2 in this state, the fluid actuator 53 is locked. Therefore, the front-rear position is fixed. In this state, in order to adjust the front and rear positions of the seat cushion 2 to the seated person's preference, the lock of the fluid actuator 53 is locked via the wire cable 59 by pressing the lock release button 60 formed on the armrest 17 in the seated state. Since the state is released, the cushion frame 31 is guided by the slider 41 when the seated person moves his / her waist, and until the front / rear elongated hole 44 of the support bracket 42 contacts the third pin 39, the front / rear side Can be moved. By releasing the pressing of the lock release button 60 at a desired movement position, the fluid actuator 53 is locked and the front and rear positions of the seat cushion 2 are fixed.
[0025]
Since the first link 35 is arranged in a V shape by the fifth link 38 and the sixth link 65 and the part pivotally supported by the fourth link 36 can move, the cushion can be used even if the inclination of the seat back 3 is small. Since the frame 31 and the sixth link 65 do not interfere with each other, the swing angle of the seat cushion 2 is increased. Further, as the link ratio setting range is widened, the cushion frame 2 can be swung even at a narrow reclining angle.
[0026]
Since the rear end portion of the front and rear long holes 44 of the support bracket 42 is opened, the free end portions 37a and 38a of the second and fifth links 37 and 38 that engage with the front and rear long holes 44 are opened. Since it can be inserted from the rear end portion, it is easy to engage.
[0027]
In order to tilt the seat back 3 shown in FIGS. 1 and 4 from the neutral state to the rear RR, in the seated state, the lock release button 27 disposed on the armrest 17 is pressed to release the actuator 25 from the locked state. By pushing the seat back 3 from the back to the rear RR, the seat back 3 can be tilted to the rear RR against the tension spring 57 around the support shaft 20 as shown in FIG. At this time, the lower end portion 32a of the arm bracket 32 rotates in the clockwise direction in FIG. 1, and the front end portion of the sixth link 65 of the first link 35 moves to the lower LWR. Earn money to move to the lower LWR. When the front end portion of the sixth link 65 moves downward, the rear end portion of the fifth link 38 also moves to the lower LWR, and further away from the rear end of the cushion frame 31.
[0028]
When the lock release button 27 is pressed from the final tilted state of the seat back 3 shown in FIG. 5 to release the locked state of the actuator 25, the seat back 3 is neutralized by the urging force of the tension spring 57 as shown in FIG. At this time, the position of the fifth pin 54 does not change with respect to the elongated hole 48a of the rotating arm 48, and the cushion frame 31 is maintained at that position. Further, when the lock release button 27 is pressed to release the locked state of the actuator 25, as shown in FIG. When the fifth pin 54 moves to the upper end of the long hole 48a of the arm 48, the rear end of the cushion frame 31 rotates upward, and the cushion frame 31 can be accommodated to swing.
[0029]
FIG. 6 shows a second embodiment of the present invention. Since the main difference from the first embodiment is a point related to the first link 35, only the structure of the first link 35 will be described. Others are the same as those of the first embodiment, and are omitted.
[0030]
The first link 35 includes a front end portion 28 a of an I-shaped seventh link 28 in which a rear end portion 28 b is pivotally supported by a first pin 13 on a lower end portion 32 a of the arm bracket 32, and a rear side of the base frame 12. A V-shaped eighth link 29 that protrudes from the end portion 12a of the RR toward the front side FR and has a lower end portion 29a pivotally supported by a ninth pin 34 at an intermediate portion of the first link bracket 10 supported by the end portion 12a. The upper end portion 29b of the second link 37 is rotatably supported by the eighth pin 33, and the front end portion 38a is pivotally supported by the third pin 39 on the upper end portion 37a of the second link 37. A rear end portion 38b of the link 38 is rotatably supported by a tenth pin 30 at an intermediate portion of the eighth link 29, and a front end portion 28a of the seventh link 28 is inclined to the lower LWR. The front end portions 37 a and 38 a of the second and fifth links 37 and 38 are pivotally supported by a third pin 39 in the front and rear elongated holes 44 of the support bracket 42. A bearing surface slide rotary collar 40 is rotatably supported on the third pin 39 so that it can slide back and forth in the longitudinal slot 44 of the support bracket 42. The front and rear long holes 44 are open at the rear end.
[0031]
Next, the operation according to this embodiment will be described. The first link 35 includes the fifth link 38, the seventh link 28, and the eighth link 29, and the front end portion 28a of the seventh link 28 is inclined to the lower LWR. Therefore, even if the inclination of the seat back 3 is small, the swing angle of the seat cushion 2 is increased as much as the cushion frame 31 and the seventh link 28 do not interfere with each other. Further, the cushion frame 31 can be swung even with a narrow reclining angle because the link ratio setting range is widened.
[0032]
The present invention is not limited to the structure of the above-described embodiment, and the shape and structure of each part can be freely modified and changed as necessary, and various modifications can be made to each part of the seat device 1. Is included. For example, although the embodiment uses the actuator 25 for the tilting operation of the seat back 3, the present invention is not limited to this, and various means may be adopted as long as the seat back 3 can be tilted. Of course.
[0033]
Further, although the description has been made assuming that the locked state of the actuator 25 for tilting the seat back 3 and the fluid type actuator 53 for moving the cushion frame 31 back and forth is released by the lock release buttons 27 and 60, respectively. Of course, any release mechanism such as a pivot lever may be used.
[0034]
【The invention's effect】
According to the first aspect of the present invention, the first link is arranged in a V shape between the fifth link and the sixth link, and the portion pivotally supported by the fourth link can move, so the inclination of the seat back Even if is small, the swing angle of the seat cushion is increased because the cushion frame and the sixth link do not interfere with each other. Further, as the link ratio setting range is widened, the cushion frame can be swung even with a narrow reclining angle.
[0035]
According to the second aspect of the invention, the first link includes the fifth link, the seventh link, and the eighth link, and the front end portion of the seventh link is inclined downward, so that the seat back is inclined. Even if is small, the swing angle of the seat cushion increases because the cushion frame and the seventh link do not interfere with each other. Further, as the link ratio setting range is widened, the cushion frame can be swung even with a narrow reclining angle.
[Brief description of the drawings]
FIG. 1 is a side view of a seat device according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view of the seat device of FIG.
FIG. 3 is a side view showing a state in which the main portion of the back frame in FIG. 1 is in the forwardmost tilt position and the cushion frame is in the rearmost position.
4 is a view corresponding to FIG. 3, showing a state in which the back frame in FIG. 3 is in a neutral position and the cushion frame is in a rearmost position.
5 is a view corresponding to FIG. 3, showing a state in which the back frame in FIG. 3 is in the last tilt position and the cushion frame is in the neutral position.
FIG. 6 is a view corresponding to FIG. 3 showing a state in which the back frame according to the second embodiment of the present invention is in the last inclined position and the cushion frame is in the neutral position.
FIG. 7 is a view corresponding to FIG. 3 showing a state in which the back frame of the conventional example is in the foremost tilt position and the cushion frame is in the rearmost position.
8 is a view corresponding to FIG. 3, showing a state in which the back frame of FIG. 7 is in the neutral position and the cushion frame is in the rearmost position.
9 is a view corresponding to FIG. 3, showing a state in which the back frame in FIG. 7 is in the last tilt position and the cushion frame is in the last end position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Automobile seat apparatus as "vehicle" 2 Seat cushion 3 Seat back 11 Leg stand 12 Base frame 12a Base frame rear end 12b Base frame front end 20 Support shaft 21 Back frame 28 Seventh link 28a 7th link front end portion 28b 7th link rear end portion 29 8th link 29a 8th link lower end portion 29b 8th link upper end portion 31 Cushion frame 32 Arm bracket 32a Arm bracket lower end portion 35 1st link 36 1st link 4 link 36a lower end portion 36b of fourth link upper end portion 37 of fourth link second link 37a free end portion (upper end portion) of second link
38 5th link 38a Free end (front end) of 5th link
38b Rear end portion 42 of fifth link Support bracket 44 Longitudinal hole 48 Rotating arm 48b Upper end portion 48c of rotating arm Lower end portion 49 of rotating arm Support frame 53 Fluid actuator 65 Sixth link 65a Rear of sixth link End 65b Front end FR of the sixth link FR Front RR Rear UP Upper LWR Lower

Claims (2)

A base frame supported on a leg base, a seat cushion supported on the base frame and slidable in the front-rear direction; and standing on the base frame on the rear end side of the seat cushion and in the front-rear direction A seat back that is pivotally supported by a support shaft so that it can tilt;
The arm bracket is suspended below the support shaft of the back frame of the seat back,
In the cushion frame of the seat cushion, a support frame is bridged in the left-right direction at a substantially central portion in the front-rear direction, and a support bracket is extended in the front-rear direction and supported at the rear end side.
A first link whose rear end is pivotally supported by the lower end of the arm bracket, and a first link whose lower end is pivotally supported at a position ahead of the rear end of the first link among the rear ends of the base frame . 2 and the link, are provided, these first, it is pivotally supported by the front and rear long hole of each of the free ends to each other the support bracket of the second link,
An upper end portion of a rotating arm rotatably supported on the front end portion of the base frame is rotatably supported on the support frame, and a lower end portion of the rotating arm is rotatably supported on a fluid actuator. And
In the vehicle seat, the fluid actuator is rotatably supported at the rear end portion of the base frame and can be locked and unlocked at the telescopic position.
The first link includes an upper end portion of an I-shaped fourth link in which a lower end portion is pivotally supported at a position rearward of a lower end portion of the second link in a rear end portion of the base frame, and the second link A rear end portion of an I-shaped fifth link whose front end portion is pivotally supported by an upper end portion of the arm bracket; and a front end portion of an I-shaped sixth link whose rear end portion is pivotally supported by the lower end portion of the arm bracket; The vehicle is characterized in that it is rotatably supported and is arranged in a V-shape between the fifth link and the sixth link with the front end portion of the sixth link inclined downward. Sheet. A base frame supported on a leg base, a seat cushion supported on the base frame and slidable in the front-rear direction; and standing on the base frame on the rear end side of the seat cushion and in the front-rear direction A seat back that is pivotally supported by a support shaft so that it can tilt;
The arm bracket is suspended below the support shaft of the back frame of the seat back,
In the cushion frame of the seat cushion, a support frame is bridged in the left-right direction at a substantially central portion in the front-rear direction, and a support bracket is extended in the front-rear direction and supported at the rear end side.
The first link whose rear end is pivotally supported by the lower end of the arm bracket, and the lower end of the rear end of the base frame is pivotally supported at a position ahead of the rear end of the first link. a second link, is provided, these first, each of the free ends portions of the second link, it is pivotally supported by the front and rear long hole of the support bracket,
An upper end portion of a rotating arm rotatably supported on the front end portion of the base frame is rotatably supported on the support frame, and a lower end portion of the rotating arm is rotatably supported on a fluid actuator. Being
In the vehicle seat, the fluid actuator is rotatably supported at the rear end portion of the base frame and can be locked and unlocked at the telescopic position.
The first link includes a front end portion of an I-shaped seventh link whose rear end portion is pivotally supported by a lower end portion of the arm bracket, and a lower end portion of the second link among the rear end portions of the base frame. In addition, an upper end portion of a V-shaped eighth link whose lower end portion is pivotally supported at the rear position is rotatably supported and a front end portion is pivotally supported on the upper end portion of the second link. A vehicle seat characterized in that a rear end portion of a letter-shaped fifth link is pivotally supported by an intermediate portion of the eighth link, and a front end portion of the seventh link is inclined downward.

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