JP3300166B2 - Power comfort seat structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power comfort seat structure which secures a comfortable posture of a seat by at least a swing operation of a seat cushion following a swing of the seat back and a bending operation of the seat back.

[0002]

2. Description of the Related Art As a seat for an automobile or the like, for example, there is provided a middle-foldable seat back in which an upper half can be tilted forward with respect to a lower half, and a seat cushion which can swing following the swing of the seat back. Comfort seats are known. As such a comfort seat, a power comfort seat that reclines and breaks a seat back under the drive control of a corresponding motor is provided.

[0003] In such a comfort seat, the seat cushion is swung up and down in conjunction with reclining of the seat back.
The inclination of the seat cushion according to the reclining angle can be obtained, and the buttocks of the occupant due to reclining of the seat back can be prevented. By bending the seat back in addition to the swing of the seat cushion, a comfortable posture (relaxed posture) without back tilting of the head of the seated person can be sufficiently ensured.

[0004]

By the way, in a known power comfort seat, reclining and folding of a seat back can normally be operated by separate power modules each having a dedicated motor. The independent adjustment by the module makes it possible to arbitrarily secure a comfortable posture according to the preference of the occupant.

However, in such a configuration having two power modules, an increase in the number of parts is inevitable, and the configuration tends to be complicated. In such a configuration, since the motor itself is expensive, an increase in the overall cost of the power module, that is, the power comfort seat is unavoidable.

Further, since reclining and folding of the seat back are independently adjusted by the two systems of power modules, the operation may be complicated. Since the relative relationship between the reclining angle and the bending angle suitable for relaxation or the like cannot be easily set, fine adjustment of both repetitions is required. Therefore, the operation is likely to be complicated from this point, and there is a possibility that the operability may be reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a power comfort seat structure in which a seat back is reclined with a seat cushion swing and a seat back is bent using only one system of power modules.

[0008]

According to the present invention, a fulcrum of a substantially rectangular link is pivotally mounted on the upper end of the lower half of the seat back. The lower end of the upper half of the seat back is connected and fixed to one end of the link on the rear side of the fulcrum, and the other end of the front side of the link is connected to the seat back via a rotatable connection means. At the front side adjacent to the center of motion,
It is rotatably connected to the fixed member.

[0009]

In this configuration, the connecting member pivotally connected at one end to the fixed member follows the swing of the seat back because the link end pulls and pushes the corresponding terminal of the link under the swing of the seat back. A folded seat back is obtained. Therefore, only one power module is required, and the configuration of the power comfort is simplified.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a power comfort seat structure 10 according to the present invention, a seat back 12 is swung in a front-rear direction by a power recliner 16 which can be operated under the drive of a motor 14. The seat cushion 18 is connected to the seat back so that the seat cushion 18 can swing vertically in accordance with the swing of the seat back.

The power recliner 16 includes, for example, a base frame 24 fixed to a seat slide device 22 via brackets 20 and 21 and an arm plate 26 fixed to a side frame 25 of the seat back 12.
The arm plate is swingably connected to and supported by the base plate via the output shaft 14a. Motor 14
For example, a DC geared motor can be used, and the motor is arranged by being fixed to the base frame 24.
It should be noted that the motor 14 of the power recliner is generally configured to be drive-controllable under a predetermined switch operation or the like.

As shown in FIGS. 1 and 2, in the power comfort seat structure 10, for example, a seat cushion frame forming a skeleton of a seat cushion 18 is provided.
The front end of 18a is connected to the base frame 24 via the front link 28, and the rear end of the seat cushion frame is connected to the seat back 12 via the rear link 30. As shown in FIG. 1, for example, a rear link 30 is pivotally attached to a lower end of a support plate 32 extended by fixing a power recliner to an arm plate 26.

The front link 28 and the rear link 30
Are arranged separately from each other on the left and right sides. Then, for example, the left and right front links 28 can be integrally swung by connection with a connecting rod 34 (see FIG. 2).

Here, as shown in FIGS. 1 and 2, in the power comfort seat structure 10 of the present invention, the seat back 12 is separately formed into an upper half portion 12a and a lower half portion 12b. It is assembled as a so-called center-bend type, with the connection between them, the upper half being pivotable forward with respect to the lower half.

As can be seen from FIG. 2, the seat back
The lower half 12b serving as the base of the unit 12 is formed in a predetermined shape, for example, with a frame 36 and the like fixed between the left and right side frames 25 and fixed. As shown in FIGS. 1 and 2, the lower frame 38, which forms part of the skeleton of the upper half 12a of the seat back, is connected to the side frame 25 by a fulcrum 40a.
One end of the rear side of the generally rectangular link 40 pivoted
The upper half portion 12a of the seat back is tilted forward with respect to the lower half portion 12b, that is, can be bent in half under the rotation of the link about the fulcrum.

Here, in the present invention, the other end 40c of the front side of the link 40 is rotatably connected to a fixed member, for example, the base frame 24 via a connecting means 42. For example, a plate-shaped connecting arm can be used as the connecting means 42, and the other end of the connecting arm pivotally connected at one end at the center of swing of the seat back 12, that is, at a position adjacent to the output shaft 14a of the motor, is connected. At the other end 40c.

In the power comfort seat structure 10 as described above, for example, when the seat back 12 is swung backward from the reclining position shown in FIG. By moving the support arm 32, which is integral with the arm plate 26, about the shaft 14a in the counterclockwise direction, the seat cushion 18 is swung forward and upward with the rotation of the front link 28 and the rear link 30. (See FIG. 3).

When the seat back 12 swings backward, the link 40 turns counterclockwise around the fulcrum 40a due to the pulling of the link terminal 40c by the connecting arm 42 accompanying the backward tilt of the seat back. As shown in FIG. 3, the upper half 12a of the seat back is moved forward with respect to the lower half 12b. That is, the comfort posture of the comfort seat is automatically set according to the reclining angle of the seat back due to the bending of the seat back 12 in addition to the swing of the seat cushion 18.

When the motor 14 is driven in the reverse direction to swing the seat back forward from the backward tilt position of the seat back 12 as shown in FIG. 3, the connecting arm 42 associated with the swing of the seat back. The link 40 pivots clockwise about the fulcrum 40a by pushing up the terminal 40c by the upper end of the seat back with respect to the lower half 12a of the seat back.
By tilting backward 12b, the seat back is returned to the initial shape of FIG.

When the seat back 12 is swung forward, the seat cushion 18 follows the swing of the seat back by the swing accompanied by the rotation of the front link 28 and the rear link 30, and as shown in FIG. To the initial position shown.

As described above, according to the power comfort seat structure 10 of the present invention, both the swing of the seat cushion 18 and the bending of the seat back 12 can be obtained only by driving the motor 14 of the power recliner 16. . In other words, the comfort posture of the power comfort seat can be obtained with only one power module of the power recliner 16 without using a power module including a dedicated motor for operating the bending of the seat back 12, and the number of parts is greatly reduced. Simplification of the configuration and reduction of the cost can be sufficiently achieved.

The swing angle of the seat cushion 18 suitable for the reclining angle and the bending angle of the seat back are automatically set only by the reclining adjustment operation of the seat back 12. The simplicity and simplicity certainly improve operability.

Also, the upper half 12a of the seat back is fixed to one end 40b of the link, and the connecting arm
Since it is sufficient to connect the other end 40c of the link to the base frame 24 via 42, the configuration is not complicated, and from this point, the configuration can be simplified and the cost can be sufficiently reduced. .

By using the substantially rectangular link 40, the rotation of the terminal 40b when the terminal 40c is connected to the base frame 24, that is, the bending operation of the seat back 12 in the middle can be accurately obtained.

Here, in the embodiment, the connecting arm is exemplified as the connecting means 42, but it is sufficient if the link terminal 40c is rotatably connected to the base frame 24. The present invention is not limited to this. For example, a rod-shaped connecting rod or the like may be used as the connecting means. However, since the connecting arm is plate-shaped, if the connecting arm is used as the connecting means 42, a large arrangement space is not required, and a reduction in the arrangement space can surely prevent the cushioning property of the seat back from lowering.

Although the base frame 24 is used here as a fixing member to which the other end 40c of the link is connected, any member fixed to the same member as the power recliner 16 is sufficient. The fixing member is not limited to the base frame, and for example, a bracket or the like of another member fixed to the seat slide device 22 may be used.

However, if the base frame 24 is used as a fixing member, the number of components can be reduced in this respect as well, and the structure can be further simplified.

In the embodiment, the seat back 12
Although the power comfort seat which can obtain the swing of the seat cushion 18 and the bent back of the seat back following the reclining of the vehicle is embodied, the present invention is not limited to this. The present invention can be applied to a power comfort seat that can be further secured.

And, it is not limited to an automobile seat.
For example, the power comfort seat structure of the present invention may be used for seats for trains, airplanes, ships, and the like, and for seats, hairdressing, and the like.

The embodiments described above are for explaining the present invention, and do not limit the present invention in any way.
It goes without saying that all modifications and alterations within the technical scope of the present invention are included in the present invention.

[0032]

As described above, according to the power comfort seat structure of the present invention, the seat cushion swings and the seat back is bent in accordance with the reclining of the seat back only by the operation of the power module including the power recliner. Are obtained. That is, since only one power module is required to be provided in the power comfort seat, the total number of components of the power comfort seat can be reduced. Therefore, the configuration of the power comfort seat structure can be simplified and the cost can be reduced reliably.

The swing angle of the seat cushion suitable for the reclining angle and the bending angle of the seat back are automatically set only by adjusting the reclining of the seat back, thereby simplifying the operation. As a result, the operability is reliably improved.

Further, it is sufficient that the upper half of the seat back is fixed to one end of the link, and the other end of the link is rotatably connected to the fixing member via the connecting means. From this point, the simplification of the configuration and the reduction of the cost can be sufficiently achieved from this point.

By using the substantially rectangular link, the rotation of the terminal when the terminal is connected to the fixing member,
That is, the bending operation of the seat back can be accurately obtained.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a power comfort seat structure according to the present invention in an initial state.

FIG. 2 is a schematic perspective view of a partially broken power comfort seat structure.

FIG. 3 is a schematic side view of the power comfort seat structure in a seat back rearwardly inclined position.

[Explanation of symbols]

 10 Power comfort seat structure 12 Seat back 12a Upper half 12b Lower half 14 Motor 14a Output shaft (oscillation center) 16 Power recliner (power module) 18 Seat cushion 24 Base frame (fixing member) 28 Front link 30 Rear link 40 Link 42 Connecting means (connecting arm)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60N 2/22 A47C 1/024 A47C 7/46

Claims (1)

(57) [Claims] A folded back seat comprising a combination of separated upper and lower halves; a front link supporting the front end and a rear link connecting to the seat back. A power comfort seat structure comprising: a seat cushion provided so as to be able to swing following the swing of the seat back; and a power recliner for swinging the seat back in the front-rear direction under the driving of a motor. At the upper end of the lower half of the back, a fulcrum of a substantially U-shaped link is pivotally connected, and at one end of the link on the rear side from the fulcrum, the lower end of the upper half of the seat back is connected and fixed. The other end of the front side is rotatable with respect to the fixed member at a position on the front side adjacent to the center of rotation of the seat back via a rotatable connection means. Power Comfort sheet structure characterized in that it is sintered.