JPH04741Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to an electric vehicle seat that can be slid and reclined by an electric motor.

(Conventional technology) Traditionally, automobile seats have been slid,
All operations such as reclining were performed manually, but recently, devices have been developed in which these operations are performed using electric motors.

(Problem that the invention aims to solve) In the case of electric-powered devices like this, even if you hit an obstacle while operating the seat, it is easy to continue operating the seat without noticing. for example,
If you slide the seat backwards while it is fully reclined, there is a high risk of interference with obstacles behind the seat, and if this happens, the seat may be damaged and the seat drive system may be disrupted.

In view of the above-mentioned problems, the present invention aims to provide an electric seat that can avoid interference with obstacles.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a driving electric circuit for an electric vehicle seat that turns on when the seat back is at a reclining angle larger than a preset reclining angle. When the reclining angle detection switch is activated, the slide position detection switch is activated when the seat is located behind a preset slide position, the reclining electric motor lodging switch, and both of the detection switches are in the ON state, When the motor stop relay that interrupts the drive circuit of the reclining electric motor, the reclining electric motor raising switch, and both of the detection switches are in the on state, the reclining electric motor is supplied with current without going through the raising switch. It is characterized by incorporating a directly connected emergency standing relay.

(Function) According to the above configuration, when the seat is slid backwards with the seat back reclined to a tilt angle greater than the set value, the emergency standing relay is activated when the seat reaches the set sliding position. When activated, the reclining electric motor is directly connected to the power source and rotates toward the upright side, and the seat back is erected to an inclination angle that is less than the set value.

Additionally, if the seat back is folded down with the seat positioned further back than the preset slide position, the motor stop relay is activated when the seat back reaches the preset inclination angle, causing the reclining electric motor to recline. The motor stops rotating, and the seat back no longer tilts toward the reclining side.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a driving electric circuit for driving a seat S of a driver's seat. In the figure, 1 is a reversibly rotatable sliding motor for sliding the seat S in the front-rear direction, and 2 is a reversibly rotatable reclining motor for reclining the seat S, respectively. built into the mechanism. Note that since both of these mechanisms are well-known prior art, their explanations will be omitted.

Both motors 12 are each connected to a battery power source 4 via a key switch 3, and can be switched between forward and reverse directions of rotation by operating switches 5 and 6, respectively.
That is, the changeover switch 5 on the side of the sliding motor 1 has forward and backward changeover switches FSW, RSW, and the changeover switch 6 on the reclining motor 2 side has changeover switches USW, 2 for standing up and lodging. Each is equipped with a DSW.

Next, a typical example of a switch means for regulating the operation of the reclining motor 2 so that the reclining operation does not exceed a certain angle when the seat S slides backward beyond a predetermined slide position will be described.

A switch 7 capable of detecting the reclining angle of the seat S and a switch 8 capable of detecting the sliding position are respectively incorporated in the reclining mechanism and the sliding mechanism. The reclining angle detection switch 7 is kept on when the reclining angle exceeds a predetermined angle (θ), and the slide position detection switch 8 is kept on when the slide position exceeds a predetermined retreat position (S). It is becoming more and more maintained.

Also, in the middle of the wiring on the upright switch USW side in the drive circuit of the reclining motor 2,
A relay R1 for emergency standing up of the seat S is interposed. This emergency standing relay R1 is connected to both the detection switches 7 and 8 via a diode D1, and when both the detection switches 7 and 8 are in the on state, the contact point on the changeover switch 6 side , and the contact on the power supply 4 side. Further, a normally closed motor stop relay R2 is connected in the middle of the wiring on the lodging switch DSW side in the drive circuit of the motor 2.
This stop relay R2 is also connected to both detection switches 7 and 8 via a diode D2, and when both detection switches 7 and 8 are in the on state, it is turned off and the reclining motor is driven. It's supposed to open the circuit.

Subsequently, the functions and effects of this example formed as described above will be specifically explained.

First, when key switch 3 is on,
A case will be described in which the seat S is slid rearward from a fully reclined state, for example.

In this case, since the reclining angle of the seat S exceeds the set angle (θ), the reclining angle detection switch 7 is in the on state.
In this state, when the retraction switch RSW of the changeover operation switch 5 for the slide motor 1 is turned on, the slide motor 1 is energized in the direction shown by arrow P in the figure, and as a result, the sheet S is retracted.
When the slide position of the seat S reaches the set position (S), the slide position detection switch 8
is turned on. Then, the contact point of the emergency standing relay R1 switches to the power source 4 side, so that the reclining motor 2 is energized in the standing direction (energization in the direction of arrow Q in the figure), and the seat S is forcibly erected. . When the reclining angle reaches the set angle (θ), the reclining angle detection switch 7 is turned off, so the emergency standing relay R1
is turned off, and the power supply to the reclining motor 2 is automatically stopped. Therefore, as shown in FIG. 2, if there is an obstacle W behind the seat S, even if you move backward with the seat S reclined, the seat S will stand up at a certain position, so there will be no interference between the seat S and the obstacle. Interference with the object W is avoided.

Next, a case will be described in which an attempt is made to recline the seat S at a position beyond the set position (S).

In this case, the slide position detection switch 8 is kept in the on state. Operation switch 6 for switching the reclining motor 2 Lodging switch
When the DSW is turned on, the reclining motor 2 is energized in the direction of the arrow Q shown in the figure, and the seat S tries to recline, but the reclining angle soon reaches the set angle (θ), so the stop relay R
2 is turned off, the reclining motor 2
Electricity is automatically stopped, and the reclining operation of the seat S is stopped as an emergency. Therefore, as in the above case, interference with the obstacle W is avoided.

(Effects of the Invention) Since the present invention has the above-described configuration, the seat is prevented from interfering with obstacles in the rear, so that damage to the seat and its drive system is prevented.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit for driving the seat of this example, and FIG. 2 is an explanatory diagram for explaining the problems to be solved by the present invention. 1... Slide motor, 2... Reclining motor, 7... Reclining angle detection switch, 8... Slide position detection switch, R1...
...Emergency stand-up relay, R2...Stop relay.

Claims (1)

[Claims for Utility Model Registration] A sliding electric motor for sliding a seat in the longitudinal direction of a vehicle; and a reclining electric motor for reclining the seat back of the seat to a predetermined inclination angle with respect to the seat cushion. A reclining angle detection switch that is turned on when the seat back is at a reclining angle larger than a preset reclining angle; When the slide position detection switch is turned on when the seat is located behind a preset slide position, the reclining electric motor lodging switch, and both of the detection switches are on,
When the motor stop relay that interrupts the drive circuit of the electric motor for reclining, the switch for raising the electric motor for reclining, and both of the detection switches are in the ON state,
An electric vehicle seat characterized in that it incorporates an emergency standing relay that connects the reclining electric motor directly to a power source without going through a standing switch.