JPH0747016A - Seat device - Google Patents

Abstract

PURPOSE:To mitigate compatibly by means of simple control a sense of incongruity following the change of a reclining angle and the fatigue of a seated person due to long time operation or the like. CONSTITUTION:This is a seat device equipped with a seat back CL1 to support the back portion of a seated person on a support surface; a reclining angle adjusting mechanism CL2 to adjust the reclining angle of the seat back CL1; a shape setting means CL3 to conduct setting by changing the shape of the support surface; a control means CL4 to control the shape setting means CL3 according to the operation of the reclining angle adjusting mechanism CL2; and a shape changing means CL5 to change the shape of the support surface independently of the shape setting means CL3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device capable of variably controlling the shape of a supporting surface.

[0002]

2. Description of the Related Art A conventional seat device of this type is shown in FIG.
Is disclosed in Japanese Utility Model Publication No. 1-133443. The seat device 101 includes an air bag 105 (105a, 105b, 105c) inside a seat back 103.
The operation of the pump 107 that supplies air into the air bag 105 is controlled according to the reclining angle detected by the angle sensor 109. For example, when the seat back 103 is tilted as shown in FIG. Decrease.
As a result, when the seat back 103 is tilted, FIG.
The lower part A of the supporting surface of the seat back 103 is projected to press the waist of the seated person like this, or the supporting surface is separated from the back of the seated person when the seat back 103 is raised. This kind of discomfort can be alleviated.

Another seat device shown in FIG. 13 is disclosed in Japanese Patent Laid-Open No. 3-188806. This seat device 111 is provided with a movable member 117 which is driven by a motor 115 inside a seat back 113, and the front and rear positions of the movable member 117 are changed by a manual switch 119, and a select switch 121 is provided.
Thus, the motor 115 is rotationally driven in the forward and reverse directions via the pulse oscillator transmission 123. Thereby, the movable member 11
Since the vibration drive 5 gives an appropriate stimulus to the waist of the seated person, fatigue of the waist of the seated person due to long-term driving or the like can be alleviated.

[0004]

Here, in the seat device 101 shown in FIG. 10, as in the seat device 111 shown in FIG. 13, the support surface of the seat back 103 is vibrated by increasing or decreasing the air amount of the air bag 105. It may be possible to drive it to reduce fatigue of the seated person.

However, in the seat device 101 shown in FIG.
Since the amount of air in the air bladder 105 is increased / decreased according to the reclining angle, the amount of air in the air bladder 105 is different before and after the reclining angle is changed. The amount setting had to be changed according to the reclining angle. In order to change the setting of the increase / decrease air amount according to the reclining angle in this way, the increase / decrease change pattern of the air amount becomes complicated, so that the drive control of the air bladder 105 cannot be performed by simple control. It was

[0006] Therefore, an object of the present invention is to provide a seat device which can easily alleviate the discomfort caused by the change of the reclining angle and the fatigue of the seated person due to long-time driving etc. by simple control. .

[0007]

To achieve the above object, the present invention provides a seat back CL1 for supporting the back of a seated person on a support surface and a reclining angle adjusting mechanism CL2 for adjusting the reclining angle of the seat back CL1.
The shape setting means CL3 for changing and setting the shape of the support surface, the control means CL4 for controlling the shape setting means CL3 according to the operation of the reclining angle adjusting mechanism CL2, and the shape setting means CL3. The seat apparatus is provided with a shape changing means CL5 for independently changing the shape of the support surface.

[0008]

According to the seat device of the present invention, when the reclining angle is changed by the reclining angle adjusting mechanism CL2, the control means CL4 controls the shape setting means CL3 according to the operation of the reclining angle adjusting mechanism CL2. The shape of the support surface is changed and set to the optimum shape according to the reclining angle.

Further, since the shape changing means CL5 is provided independently of the shape setting means CL3, the shape changing means CL5 changes the shape of the supporting surface for mitigating fatigue. It can be performed independently of the operation of the means CL3.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is an overall configuration diagram of a vehicle seat device according to the present invention. A seat device 1 includes a seat cushion 3 for supporting a buttocks of a seated person who is a vehicle occupant on a seat surface 3a.
Seat back 5 that supports the back of the seated person on the support surface 5a
(CL1).

The seat back 5 is internally provided with a skeleton member 15 that holds the shape of the seat back 5 and supports the back of a seated person, and a lower portion 17 of the skeleton member 15 is rotatably connected to the seat cushion 3 side. . A reclining angle adjusting mechanism CL2 (not shown) is provided in the lower portion 17 of the skeleton member 15, and the skeleton member 15 is provided by the reclining angle adjusting mechanism.
Is fixed to an arbitrary slope. The reclining angle adjusting mechanism CL2 includes an angle sensor 19, and the reclining angle adjusting mechanism CL2 adjusts and detects the reclining angle of the seat back 5.

In the seat back 5 on the back side of the support surface 5a, three shape-changing air bags 7 (7a, 7b, 7c) as shape changing means CL5 are arranged in parallel in the vertical direction. Air ducts 8a, 8b, 8c are connected to the air bladder 7, and each air duct 8a, 8b, 8c is connected to an air compressor 27 via an electromagnetic control valve 29. The air pipes 8a, 8b, 8c are provided with pressure sensors 31a, 31b, 31c for detecting the pressure in the air bladder 7, respectively.
The pressure detected by the pressure sensors 31a, 31b, 31c is input to the controller 23, and the controller 23 controls the opening / closing of the electromagnetic control valve 29 according to the internal pressure of the air bladder 7.
When the electromagnetic control valve 29 is controlled to open and close, each air bladder 7 repeatedly expands or contracts, and the shape of the support surface 5a is vibration-driven.

The air bladder 7 is fixed on a support plate 9. The support plate 9 is supported by the skeleton member 15 at both upper and lower ends via the spring members 11, and between the support plate 9 and the skeleton member 15, a shape setting air bag 13 as the shape setting means CL3 is arranged. There is. An air duct 14 is connected to the air bag 13, and the air duct 14 is connected to an air compressor 27 via an electromagnetic control valve 21. A pressure sensor 33 that detects the pressure inside the air bladder 13 is connected in the middle of the air pipeline 14. The pressure detected by the pressure sensor 33 is input to the controller 25 as the control means CL4 together with the reclining angle detected by the angle sensor 19, and the controller 25 controls the electromagnetic control valve 21 according to the internal pressure of the air bladder 13 and the reclining angle. Open and close control. When the electromagnetic control valve 21 is controlled to open and close, the air bag 13
Expands or contracts, the support plate 9 moves in the front-rear direction, and the shape of the support surface 5a is changed and set to the optimum shape according to the reclining angle.

That is, when the seat back 5 is raised from the state shown in FIG. 3 to the state shown in FIG. 4, the angle sensor 19 detects the reclining angle and the controller 25
Controls opening / closing of the electromagnetic control valve 21 according to the reclining angle to reduce the pressure in the air bladder 13 to a predetermined pressure. When the pressure in the air bag 13 decreases, the support plate 9 is moved rearward by the urging force of the spring member 11, and the lower shape of the support surface 5a is changed and set back as shown in FIG. . As a result, the contact of the support surface 5a with the seated person is reduced.

On the contrary, when the seat back 5 is tilted and raised as shown in FIG. 3, the angle sensor 19 detects the reclining angle, and the controller 25 controls the opening / closing of the electromagnetic control valve 21 according to the reclining angle to deflate the air bag. The pressure in 13 is increased to a predetermined pressure. When the pressure in the air bag 13 increases, the support plate 9 moves forward against the urging force of the spring member 11, and the lower shape of the support surface 5a is entirely set and pushed. As a result, the support surface 5a is prevented from coming off from the seated person.

Next, the control of this embodiment will be described with reference to FIGS.

When the seated person turns on the ignition switch, the compressor 27, the angle sensor 19, the controllers 23 and 25, etc. are turned on and the main control is started.

In step S1, the air bag 1 for changing the shape is formed.
Air is introduced into the air bladder 13 so that the pressure in 3 becomes a predetermined pressure. This is the air bag 1 at the start of control.
This is because there is a possibility that all the air in 3 has been released.

In step S2, the seated person sets the initial shape of the support surface 5a, sets a variable cycle for relieving fatigue, and adjusts the reclining angle. Instructions for setting the initial shape and setting the variable cycle are input from a seated person to an input operation unit (not shown) provided in the vehicle compartment, and this instruction signal is input to the controller 25. Controller 25
Changes the shape of the support surface 5a by increasing or decreasing the pressure inside the air bags 7, 13 according to the instruction. Further, the adjustment of the reclining angle is performed by the operation of the reclining angle adjusting mechanism by the seated person.

In order to start the fatigue mitigation control, the seated person sets the input operation section to the start mode (step S
3), go to step S4.

In step S4, the pressure of the air bladder 7 and the variable cycle set in step S2 are stored (memory) in the controller 23 for shape change, and the pressure and the reclining angle of the air bladder 13 are set in the controller 21 for shape setting. Memorized in.

In step S5, fatigue mitigation control is started. The control of the fatigue mitigation is performed by the controller 23 increasing or decreasing the pressure of the air bladder 7 every predetermined time in accordance with the variable cycle set in step S4. Thereby, the support surface 5
When a is vibrating, the lumbar region of the seated person is stimulated and fatigue is relieved. When the fatigue mitigation control starts, the process proceeds to step S6.

In step S6, the angle sensor 19 sequentially detects the reclining angle, and when the reclining angle is changed, the process proceeds to step S7.

In step S7, it is determined whether the reclining angle is increased or decreased. If it is increased (when the seat back 5 is tilted), the process proceeds to step S8. If it is decreased (when the seat back 5 is raised), step S10 is performed. Proceed to.

In step S8, the air bag 1 for shape setting is used.
The pressure of 3 is reduced by a predetermined amount, and the process proceeds to step S9.

In step S9, it is judged whether or not the pressure of the air bladder 13 has reached the proper pressure. If the pressure is not yet the proper pressure, the process returns to step S8 to further reduce the pressure, and when the proper pressure is reached, , And proceeds to step S12. The proper pressure of the air bladder 13 is obtained by the controller 25 according to the reclining angle.

As a result, as shown in FIG.
Moves rearward, and the lower shape of the support surface 5a formed by the air bag 7 for relieving fatigue is changed and set so as to retreat as a whole, and the contact of the support surface 5a with the seated person is relaxed.

Further, even if the shape of the support surface 5a is changed and set in this way, the air bag 7 for alleviating fatigue is simply retracted and the pressure is not changed.
The fatigue mitigation control can be continuously performed without particularly changing the pressure of the air bladder or the variable cycle stored in 4.

On the other hand, in step S10, the pressure of the air bag 13 for shape setting is increased by a predetermined amount, and the process proceeds to step S11.

In step S11, it is judged whether the pressure of the air bladder 13 has reached the proper pressure. If the pressure is not yet the proper pressure, the process returns to step S10 to further increase the pressure, and when the proper pressure is reached. Proceeds to step S12. The appropriate pressure of the air bladder 13 is obtained by the controller 25 according to the reclining angle as in step S8.

As a result, as shown in FIG. 3, the lower shape of the support surface 5a is changed and set so that the support surface 5a is entirely extruded, and the support surface 5a is prevented from coming off from the seated person.

Further, even if the shape of the support surface 5a is changed and set in this way, the air bag 7 for fatigue relaxation is only pushed out as a whole and the pressure is not changed. Therefore, in the case of step S8 Similarly, the fatigue mitigation control can be continuously performed without particularly changing the pressure of the air bladder or the variable cycle stored in step S4.

In step S12, it is judged whether or not the ignition switch is turned off. If it is off, the process proceeds to step S13 and the present control is reset and finished.

As described above, according to the present embodiment, the air bladder 7 that vibrates and drives the support surface 5a for alleviating fatigue of the seated person.
And an air bladder 13 that pushes or retracts the air bladder 7 as a whole to change the set shape of the support surface 5a according to the reclining angle, and changes the pressures of both the air bladder 7 and 13 independently. Since it did in this way, the pressure control in both air bags 7 and 13 can be performed independently. Therefore, with simple control, it is possible to relieve the discomfort associated with the change of the reclining angle and alleviate the fatigue of the seated person due to long-time driving or the like.

Next, a second embodiment of the present invention will be described.

FIG. 7 is an overall configuration diagram of this embodiment.
9 and 9 are explanatory views of the operation.

As shown in FIG. 7, the seat apparatus of this embodiment is provided with a motor 43 as a shape setting means CL3 instead of the air bag 13 for changing the setting in the first embodiment. The same parts as those in the example are designated by the same reference numerals, and the description thereof will be omitted.

The support plate 9 has an air bag 7 for changing its shape.
Has been fixed. The upper end portion of the support plate 9 is rotatably supported by the hinge portion 41, and the lower end portion thereof is connected to the connecting link 4
It is connected to the motor 43 via 5. Control means CL
The reclining angle detected by the angle sensor 19 is input to the controller 25 as 4, and the motor 43 is drive-controlled by the controller 25.

When the seated person tilts the seat back 5 by the angle θ as shown in FIG. 8, the angle sensor 19 detects the reclining angle, and the controller 25 drives and controls the motor 43 in accordance with the reclining angle to support the support plate 9. Retract the lower end of the. As a result, the support plate 9 rotates about the hinge portion 41, and the lower shape of the support surface 5a formed by the air bag 7 for relieving fatigue is changed and set so that the support surface 9a for the seated person is changed. The hit is eased.

On the contrary, when the seat back 5 is raised from the tilted state, the angle sensor 19 detects the reclining angle, and the controller 21 pushes out the lower end portion of the support plate 9 according to the reclining angle. As a result, the support plate 9 is rotated around the hinge portion 41, and the lower shape of the support surface 5a formed by the air bag 7 for fatigue mitigation is changed and set so that the support surface for the seated person is changed. The removal of 5a is prevented.

Here, the proper movement amount of the support plate 9 will be described with reference to FIG.

When the seat back 5 is tilted by an angle θ from the initial state (state shown by the broken line in the figure), the lower end of the support surface 5a is pushed out to the seated side by L as shown by the two-dot chain line, and the seated person is seated. There is a risk of hitting. Therefore, if the support plate 9 is rotated to the side opposite to the seated person by the angle ψ so that the lower end of the support surface 5a is in the same position as the initial state, the seat surface shape 5a is changed as shown by the solid line, and the reclining angle is increased. It is possible to reduce the discomfort caused by the change. That is, the proper movement amount of the support plate 9 can be uniquely determined according to the movement amount of the lower end portion of the support surface 5a due to the change of the reclining angle.

As described above, according to the present embodiment, the air bladder 7 that vibrates and drives the support surface 5a for alleviating fatigue of the seated person.
And the motor 43 that pushes or retracts the air bag 7 as a whole to change the set shape of the support surface 5a according to the reclining angle. , Support surface 5a for alleviating discomfort
The setting change of the shape can be performed independently. Therefore, with simple control, it is possible to relieve the discomfort associated with the change of the reclining angle and alleviate the fatigue of the seated person due to long-time driving or the like.

[0045]

As described above, according to the present invention, the setting of the support surface shape according to the reclining angle by the shape setting means CL3 and the change of the support surface shape for mitigating fatigue by the shape changing means CL5 are performed. Since the change can be performed independently, the simple control can both reduce the discomfort of the seated person due to the change of the reclining angle and the fatigue of the seated person due to long-term driving etc. be able to.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to a claim of a seat device according to claim 1 of the present invention.

FIG. 2 is an overall configuration diagram of the seat device according to the first embodiment of the present invention.

FIG. 3 is an operation explanatory view of the seat device according to the first embodiment of the present invention.

FIG. 4 is an operation explanatory view of the seat device according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing the control of the first embodiment of the present invention.

FIG. 6 is a flowchart showing the control of the first embodiment of the present invention.

FIG. 7 is an overall configuration diagram of a seat device according to a second embodiment of the present invention.

FIG. 8 is an operation explanatory view of the seat device according to the second embodiment of the present invention.

FIG. 9 is an operation explanatory view of the seat device according to the second embodiment of the present invention.

FIG. 10 is an overall view of a conventional seat pressure device.

FIG. 11 is an overall view of a conventional seat pressure device.

FIG. 12 is an overall view of a conventional seat pressure device.

FIG. 13 is an overall view of another conventional seat pressure device.

[Explanation of symbols]

 CL1 seat back CL2 reclining angle adjusting mechanism CL3 shape setting means CL4 control means CL5 shape changing means

Claims (1)

[Claims] 1. A seat back for supporting a back of a seated person on a support surface, a reclining angle adjusting mechanism for adjusting a reclining angle of the seat back, and shape setting means for changing and setting the shape of the support surface. A seat characterized by comprising control means for controlling the shape setting means according to the operation of the reclining angle adjusting mechanism, and shape changing means for changing the shape of the support surface independently of the shape setting means. apparatus.