KR100832921B1 - Active seat back system for vehicle - Google Patents

Abstract

A seat for a vehicle is provided to improve safety and to protect neck of the passenger by maintaining a predetermined distance between a headrest and a seat back. A seat for a vehicle comprises a headrest(10), a distance sensing unit(35), a headrest rotating unit(40), a control unit(30). The control unit continuously receives a signal from the distance sensing unit and judges whether the signal is within a set range, and then controls the headrest rotating unit according to the result in real time to maintain a predetermined distance between the head of a passenger and the headrest. The control unit is connected with an ECU, and has an operation switch and an automatic mode shifting unit additionally. The operation switch operates the headrest rotating unit and a seat back operating unit with a manual mode if a select switch is set in a manual operating mode. The automatic mode shifting unit changes mode of the select switch from the manual mode to an automatic mode if speed of the vehicle is over a standard speed.

Description

Vehicle seat device {Active seat back system for vehicle}

1 is a cross-sectional view showing the seating state of the occupant in the general seat

2 is an explanatory diagram showing a state of movement of a passenger during a collision

3 is a block diagram showing the concept of a sheet apparatus according to a first embodiment of the present invention;

4 is a flowchart showing an operation control process of the seat apparatus according to the present invention.

5A is a block diagram showing the concept of a sheet apparatus according to a second embodiment of the present invention.

5B is a configuration diagram schematically showing the structure of a sheet apparatus according to a second embodiment of the present invention;

6 is a circuit diagram of a control unit according to an embodiment of the present invention.

7 is a block diagram showing the concept of a sheet apparatus according to another embodiment of the present invention

<Description of Symbols for Major Parts of Drawings>

10: headrest 20: seat back

20a: upper seatback 20b: lower seatback

25 diffraction mechanism 26 seatback driving means

30: control unit 35, 36: distance detection means

40: headrest rotation means

1. Korean Laid-Open Utility Publication No. 1999-0026214 (July 15, 1999) : shock detection means for detecting a shock of a vehicle; Distance sensing means installed on the headrest and sensing a distance between the head and the headrest; Driving means driven according to a predetermined control signal and moving the headrest toward the head of the driver; And when a shock signal is detected from the impact sensing means, receives a signal output from the distance sensing means, determines a distance between the head of the driver and the headrest, and outputs a corresponding signal to the driving means to control the movement of the headrest. Disclosed is a head restraint automatic positioning device characterized in that it is provided with a control means (hereinafter referred to as "prior art 1").

2. Korean Patent Registration No. 10-0375448 (2003.03.10.registration announcement) : a collision sensor for detecting a collision of the vehicle, a position sensor for detecting the position of the occupant's head mounted inside the headrest, and mounted on the seat back And an electronic controller for receiving and controlling a signal received from the collision detection sensor, a first solenoid and a second solenoid moved by the control of the electronic controller, and a front support moving upward by the operation of the two solenoids. And a neck injury prevention device for a head restraint for a vehicle, characterized in that it is configured as a rear support (hereinafter, referred to as 'prior art 2').

3. Korean Patent No. 10-0353065 (2002.09.18. Registered notification) : a pressure sensor for mounting the interior of the headrest 10 to sense the pressure caused by the contact between the occupant's head and the headrest, seat back (20 And a first rod rotatably supported forward by an operation of a leaf spring by a signal of a collision detection sensor while being supported by the first rotary shaft at the lower end thereof, and being connected to the lower end by a second rotary shaft at an upper end of the first rod. An apparatus for preventing neck injuries of a head restraint for a vehicle, which includes a second rod rotatable backward by a signal of a pressure sensor, is disclosed.

4. Korean Laid-Open Patent Application No. 2000-0000497 (published on Jan. 15, 2000) : a rotating shaft rotatably installed at a predetermined position inside the back of the seat; A drive motor for rotating the rotary shaft; One side is fixedly installed at a predetermined position of the rotary shaft, the rod member is coupled to the detachable rod of the rod member is rotated a predetermined angle in the front and rear direction according to the rotation direction of the rotary shaft inside the guide hole; And a rotation direction restraining means for allowing the rod member to move only in one of the front and rear directions of the backrest part, wherein the driving motor receives the signal of the collision detection sensor of the vehicle to control the airbag inflation. Disclosed is a vehicle headrest device which is controlled by a control unit (hereinafter referred to as 'prior art 4').

5. Korean Patent Laid-Open Publication No. 2002-0044524 (2002.06.15. Published) : a head support installed on an upper side of a seat back to support a passenger's head; A connection member extending from the lower end of the head support to the inside of the seat back, the middle one of which is rotatably coupled to the upper end of the frame of the seat back; A movable electromagnet portion fixed to the lower end of the connecting member so as to be movable back and forth by the connecting member and having an electromagnet; A fixed electromagnet portion having an electromagnet facing the electromagnet of the movable electromagnet portion and fixed to the front side of the seat back; Collision detection sensor for detecting a collision impact amount; An active part of a vehicle seat including a control unit controlling a strength of a current applied to the movable and fixed electromagnet unit such that a repulsive force proportional to an amount of impact detected by the collision detecting sensor is generated in the electromagnets of the movable and fixed electromagnet unit A head rest is disclosed (hereinafter referred to as 'prior art 5').

6. Korean Laid-Open Patent Publication No. 2002-0055700 (published Jul. 10, 2002) : a seatback frame and a headrest frame inherent in the seatback; Upper and lower slots respectively formed at upper and center portions of the seat back frame; A guide shaft which is fixed to the slot and slides; A propulsion device associated with the collision detection sensor and having a ignition portion ignited by the signal of the collision detection sensor to protrude the propelling member; It is configured to include a support installed on the lower end of the headrest frame while being impacted by the propulsion member, in this neck injury prevention device when the propulsion member of the propulsion device impacts the support during a rear collision accident, the headrest is the front side While moving upward, the gap between the seat head and the headrest is minimized, and the head of the seat is prevented from falling back to prevent neck injury (hereinafter referred to as 'prior art 6').

7. Korean Patent Laid-Open Publication No. 2003-0021681 (published on March 15, 2003) : In the case of a rear collision of a vehicle, the gas pressure of a gas generator controlled by a signal input from a collision detection sensor drives a driving means so that a headrest An apparatus for preventing neck injuries of a head restraint for a vehicle is disclosed, which can be prevented from falling back by preventing the occupant's head from falling back during a rear collision accident by moving upward with respect to the head. It is called.)

8. Korea Patent Registration No. 10-0461146 (December 14, 2004) : Inflator explodes upon receiving the signal output from the collision sensor at the time of rear collision, and the piston descends. As the 'rod-shaped' rotating rod rotates at the same time and the headrest frame is momentarily moved forward from the seatback frame with the headrest, the gap between the seat head and the headrest support surface can be minimized. An automobile headrest device is disclosed that can prevent neck injuries caused by the head of a child being sharply flipped backwards (hereinafter referred to as 'prior art 8').

9. Korean Patent Laid-Open Publication No. 1999-0041853 (published on June 15, 1999) : The impact sensor senses a collision shock of a vehicle so that the solenoid separates the stopper from the ratchet, thereby allowing the rotation lever to rotate in the front and rear directions. The rotation lever is rotated forward along the head of the crew, which is bounced forward due to the driving inertia by the elastic force of the coil spring, and when the head of the crew is flipped backward by the reaction force acting at the stop. Disclosed is a head restraint structure of a seat for an automobile in which the elastic force of the coil spring 41, which is augmented, is supported to the rear of the head.

In general, the seat back of the vehicle refers to the backrest of the seat parts, it is a part that allows the restraint to maintain comfort by providing a reaction force at the back of the occupant (passenger).

In addition, the seatback is assembled through a seat cushion and a recliner, typically a seatback frame serving as a support, a foam providing shock absorption and comfort, and a cover for maintaining aesthetics or shape. It consists of. In addition, a headrest is mounted on the top of the seatback, and the headrest functions to comfortably support the head of the seater while driving, and serves to protect the head of the seater (rider) during a collision.

On the other hand, when a car stopped at an intersection or the like causes a speed change of 10 to 16 km and is crashed, it is very common to cause injury to the neck of a passenger, which is called a whiplash injury. This whiplash injury, or neck injury, is known to be due to the difference in relative speed between the upper body and the head of the seat. The back of the seat causes the upper body of the seat to move forward due to the impact of the seatback, while the head remains in place. The shear force acts on the neck area, and this shear force causes a sudden impact on the joints and muscles of the neck as well as injury to the neck joints. 1 is a cross-sectional view showing a seating state of a passenger in a general seat, the headrest 10 is mounted on the top of the seat back 20 serves to support the head of the passenger.

On the other hand, the body of the occupant is pushed backward by the inertia during the rear collision of the car, and the neck is bent by bending the neck by the difference between the rear speed of the occupant's upper body and the rear speed of the head. The narrower the gap (d) between (10), the smaller the risk of neck injury for the occupant.

However, the vehicle equipped with the headrest 10 as described above does not have a separate device in which the distance d between the occupant's head and the headrest 10 is adjusted so that the rear collision of the vehicle is illustrated in FIG. 2. As can be seen, the seat moves with the vehicle body pushed forward to rapidly move the upper body of the seat forward. At this time, while the upper body of the seat is pushed forward by the seatback 20 momentarily, the head makes a relative movement with the upper body by the inertia, and the relative movement of the occupant's neck causes a considerable pressure on the neck joint. Will be added. Eventually, while the upper body of the seater is pushed forward for a very short time, the head and neck are tilted backwards, and the upper body and head of the seater are pulled together while moving in opposite directions. Severe deformation of the joints occurs.

On the other hand, as a way to prevent the neck injury of the seat occupant generated as described above, when the impact signal is detected from the collision detection means, the distance between the head and the headrest by the distance detection means between the head of the driver and the headrest After the determination, the headrest automatic positioning device including a control means for controlling the movement of the headrest by outputting a signal corresponding thereto to the driving means is disclosed in Korean Patent Application Laid-Open No. 1999-0026214 (published on July 15, 1999). )).

In the related art, a first solenoid for releasing the elevating stopper of the headrest, a second solenoid for elevating and operating the headrest by a signal value of the occupant head position sensor according to the collision sensor signal; An apparatus for preventing neck injuries of a head restraint for a vehicle, which is constituted by a front support and a rear support, which are moved up and down by operation of a second solenoid, is disclosed (hereinafter referred to as 'prior art 2').

In addition, the pressure sensor is mounted on the inside of the headrest 10 and detects the pressure caused by the contact between the occupant's head and the headrest, and the signal of the collision detection sensor while being supported by the first rotating shaft in the seat back 20 A first rod rotatable forward by the operation of the leaf spring by the second rod, and a second rod rotatable backward by the signal of the pressure sensor while being connected to the lower end by a second rotating shaft at an upper end of the first rod. A neck injury prevention device of a headrest for a vehicle that is configured is disclosed in Korean Patent Registration No. 10-0353065 (2002.09.18. Registered notification) (hereinafter referred to as 'prior art 3').

And, the rotating shaft is rotatably installed at a predetermined position of the inner lower side of the back of the seat; A drive motor for rotating the rotary shaft; One side is fixedly installed at a predetermined position of the rotary shaft, the rod member is coupled to the detachable rod of the rod member is rotated a predetermined angle in the front and rear direction according to the rotation direction of the rotary shaft inside the guide hole; And a rotation direction restraining means for allowing the rod member to move only in one of front and rear directions of the backrest part, wherein the driving motor is operated at the moment when the airbag is inflated by a collision detection signal. A vehicle headrest device is disclosed in Korean Laid-Open Publication No. 2000-0000497 (published on Jan. 15, 2000) (hereinafter referred to as 'prior art 4').

However, the headrest by the operation of the drive means (rod operation by solenoid, leaf spring) from the moment when the collision by the headrest device collision detection means for preventing neck injury disclosed in the prior art 1 to the prior art 4 is detected Has not been put to practical use because it takes more than 2-3 seconds to move (or descend) to get in close contact with the driver's head.

As a solution for solving the problems (delay in response speed) of the prior arts 1 to 4, techniques for obtaining a fast response speed have been disclosed. Headrest device for preventing neck injury shown in the prior art 6 to 8 is to improve the response speed of the headrest to advance from the collision detection moment by using various propulsion devices.

First, the neck injury prevention device disclosed in Korean Patent Laid-Open Publication No. 2002-0055700 (published Jul. 10, 2002) (hereinafter referred to as “Prior Art 6”) has an ignition part ignited by a signal of the collision detection sensor. A propulsion device for protruding the propelling member is installed at the lower end of the headrest frame. In this neck injury prevention device, when the propulsion member of the propulsion device impacts the support during a rear collision, the headrest moves upward and upward. Minimize the gap between the head of the chair and the headrest, and prevent the neck from falling back by preventing the seat head from leaning back.

In addition, Korean Patent Laid-Open Publication No. 2003-0021681 (published on March 15, 2003) (hereinafter referred to as 'prior art 7') includes a gas pressure of a gas generator controlled by a signal input from a collision sensor during a rear collision of a vehicle. By driving the drive means, the headrest is moved upward with respect to the occupant's head, thereby preventing the neck injury of the occupant's head from falling back in the event of a rear collision, thereby preventing a neck injury of an automobile headrest. Is disclosed.

In addition, Korean Patent Registration No. 10-0461146 (Dec. 14, 2004) (hereinafter referred to as 'prior art 8') receives the signal output from the collision detection sensor at the moment of rear collision and the piston explodes at the same time. The lowering force of the piston causes the rotary rod to rotate at the same time and the headrest frame is moved forward and forward in the seatback frame with the headrest, thereby minimizing the gap between the seat head and the headrest support surface. A car headrest device is disclosed which can prevent neck injuries caused by sharply tilting the head of the seat back.

However, since the headrest device disclosed in the prior arts 6 to 8 uses various propulsion devices (explosive force or gas pressure) applied to obtain a quick response speed, a momentary large force may act on the seated person. The risk is high and there is a high risk of threatening the safety of the seated person.

On the other hand, Korean Patent Laid-Open Publication No. 2002-0044524 (2002.06.15.Publication) applies a current having an intensity proportional to the amount of impact input from a collision detection sensor, so that the head support is moved forward to press the passenger's head. An active headrest of an automobile seat including a control unit is disclosed. (Hereinafter, referred to as 'prior art 5') However, the prior art 5 also suddenly moves forward of the head support when a large collision impact amount is generated. By doing so, there is a high risk of threatening the safety of the seat.

Another important cause of injuries to occupants by rear collisions is the problem of seating positions. Although safety equipment design engineers design the equipment for maximum passenger protection, passengers do not understand the engineer's intentions and set up seatbacks and headrests as recommended in the guidelines, for a variety of reasons, including bad driver tax. Injuries may not occur in many cases. For example, the headrest attached to the seat has a decisive role in preventing a passenger's neck injury in the event of a rear collision, but many passengers collide with the rear because the user places the headrest too close to the head or too far. Si suffers a serious neck injury. In addition, safeguarding technicians design the dummy for a dummy, but in reality only 5% of the passengers are in the desired posture. In other words, the remaining 95% of passengers are in a driving position that was not considered in the design, using their vehicle without even knowing what danger they are exposed to in the blind spots of safety.

Therefore, there is an urgent need to develop safety equipment that actively copes with changes in attitudes of passengers.

The present invention has been made to solve the problems of the prior art as described above, and provides a vehicle seat device that can effectively prevent the neck injury of the seated person (hereinafter referred to as the passenger, passenger, etc.) during a collision or rear collision. It aims to do it.

Further, an object of the present invention is to provide a vehicle seat apparatus which maximizes the comfort of the seat by enabling the passenger to actively support the passenger according to the seating position of the passenger.

In order to achieve the above object, the vehicle seat apparatus according to the present invention continuously measures the distance between the head of the seat and the head rest at intervals of 1 to 3 seconds while the seated person is sitting on the seat, and rotates the headrest in real time. By operating the means, it is characterized in that the distance between the seat and the headrest is maintained at an optimum distance (4-6 cm).

Specific technical configuration constituting the vehicle seat apparatus of the present invention having such a feature is a head rest 10 supported by the stay 11 on the seat back 20 and a seat rest on the head rest 10. A distance sensing means for sensing a distance between the head of the child and the head rest, a headrest rotating means 40 which is driven according to a predetermined control signal and moves the headrest 10 in the direction of the head of the driver, and After determining the distance between the head and the headrest is provided with a control unit 30 for controlling the movement of the headrest by outputting a signal corresponding to the headrest rotating means 40; The control unit continuously receives the output signal from the distance sensing means at set unit time intervals, and determines whether it is within a set range of appropriate values, so that the distance between the head of the seater and the head rest is automatically kept constant. Main control of the headrest rotation means (40).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an explanatory view showing a schematic internal structure of a vehicular seat device according to a first preferred embodiment of the present invention, and FIG. 4 is a control flowchart of a control unit of the vehicular seat device according to a first preferred embodiment of the present invention. It is explanatory drawing which showed schematically.

The vehicle seat apparatus according to the first embodiment of the present invention shown in FIG. 3 includes a headrest 10 supported by the stay 11 on the seatback 20, and installed on the headrest 10. A distance detecting means 35 for detecting a distance between the head and the headrest, a headrest rotating means 40 which is driven according to a predetermined control signal and moves the headrest 10 in the direction of the head of the driver; After determining the distance between the head of the driver and the headrest and the corresponding signal is output to the headrest rotating means 40 is composed of a control unit 30 for controlling the movement of the headrest, a predetermined time interval (preferably approximately 1 to 3 seconds) to control the headrest rotating means 40 in real time to maintain a constant distance between the head of the seat and the headrest 10 at all times.

As shown in FIG. 4, the control unit 30 of the vehicle seat apparatus according to the present invention receives a signal from the distance detecting means 35 when the operation of the seat apparatus according to the present invention is started. The distance between the headrest 10 and the headrest 10 to determine whether to maintain the proper distance (preferably 4 to 6 cm), and if the distance between the head of the seater and the headrest 10 is determined to be closer than the proper distance. If so, the headrest rotation means 40 is driven. The controller continuously receives a signal from the distance detecting means 35 continuously at intervals of 1 to 2 seconds, and determines whether the distance between the head of the seater and the headrest 10 is an appropriate distance, When the proper distance is reached, the driving of the headrest rotating means 40 is stopped. If it is determined that the distance between the head of the seater and the headrest 10 is greater than the proper distance, the headrest pivoting means 40 is driven in the opposite direction, whereby the distance between the head of the seater and the headrest 10 ( d) is operated to be an appropriate distance.

The starting point of operation of the seat device according to the present invention may be configured to be started by the operation of the operation switch, but is provided with a pressure sensor in the seat cushion of the seat in general, the start switch of the car is turned on, the seat cushion inside It is preferable to configure the seat apparatus according to the present invention to automatically start the operation by the signal is applied to the pressure sensor of the for convenience and safety improvement.

The most important feature of the present invention configured as described above, the control unit 30 receives a signal from the distance detecting means 35 in real time and continuously, the distance between the head of the seat and the headrest 10 is a suitable distance And control the headrest pivoting means 40 in real time and continuously to maintain it.

Therefore, since the seat apparatus according to the present invention always maintains the gap between the seat and the headrest at a constant interval, the 'fast response' which has been a problem in the prior arts in which the operation is started at the moment of impact (or collision) occurs. Not only does it need to consider securing the speed, but also has the advantage of fundamentally preventing the risk of injury to the seat due to the rapid movement of the headrest (working speed).

In the first preferred embodiment of the present invention illustrated in FIG. 3, the headrest pivoting means 40 moves the headrest 10 forward or backward in accordance with the rotation of the motor 42 and the motor 42. It may be composed of gears 44 that can be made. However, the headrest rotating means 40 in the present invention is not limited to the configuration shown in FIG. 3, and various rotating mechanisms may be applied.

FIG. 5A is a block diagram showing the concept of a vehicle seat apparatus according to a second embodiment of the present invention, and FIG. 5B conceptually shows the mechanical configuration of the seat apparatus according to the second embodiment of the present invention.

In the vehicular seat device according to the second preferred embodiment of the present invention, in the vehicular seat device according to the first embodiment described above, the seat back 20 is divided into two parts, the upper seat back 20b and the lower seat back. It is divided into (20a), the diffraction mechanism 25 is provided between the upper seatback (20b) and the lower seatback (20a) by the operation of the diffraction mechanism 25, the upper seatback (20b) is a lower seatback And a seatback driving means (26) for operating the diffraction mechanism (25) and sensing the distance between the upper seatback (20b) and the seated shoulder of the seat (20a). It further comprises a distance sensing means 36.

That is, the lower seatback 20a is coupled to the seat cushion 1 by the recliner 2, and the upper seatback 20b is coupled to the upper seatback 20a by the diffraction mechanism 25. The headrest pivoting means 40 is provided inside the upper seatback 20b.

Of course, the diffraction mechanism 25 may be made of a group of gears such as the headrest rotating means 40 shown in FIG. 3, but may be made of rotatable connecting links, and a known recliner. (Recliner) (2) may be applied, and in addition, since those skilled in the art may appropriately modify and apply known rotating mechanisms, in the present invention, the diffraction mechanism 25 and the headrest rotating means 40 ) Will be omitted.

As shown in Figs. 5A and 5B, the seatback constituting the second embodiment of the present invention includes a headrest pivoting means 40 inside the upper seatback 20b, and thus the shoulder of the upper seatback 20b. Moving back and forth to the receiving portion 20c and the headrest 10 may further increase the comfort of the seater. Of course, in some cases, in order to move only the headrest 10, the headrest rotating means 40 may be configured at the top end of the seatback.

The second distance sensing means 36 is most preferably positioned on the stay 11 or on the shoulder 20c to detect the distance between the seat of the seat and the seatback. However, the embodiment of the present invention shown in Figs. 5A and 5B is merely an exemplary structure, and unlike the shape shown in Figs. 5A and 5B, the height of the shoulderrest 20c is the upper seatback 20b. Since it may be configured to be relatively low compared to the height of the), the installation position of the second distance detecting means 36 may be installed in any one of the shoulder portion 20c or the upper seat back (20b) in an appropriate position.

Since the headrest 10 and the head of the seat holder have a 4 to 6 cm length, the distance between the upper seatback 20b and the seat shoulder is known to be 2 to 4 cm, which is slightly smaller than this. In the configuration, the control unit 30 performs a comparison determination on the signal input by the first distance sensing means 35 and a comparison determination on the signal input by the second distance sensing means 36, respectively. It would be more desirable to configure the comparison determination unit 31 to be able to do so.

Features of the present invention according to the second embodiment configured as described above, because the headrest 10 and the upper seatback (20b) is controlled independently of each other, not only can provide comfort and comfort to the seated person However, there is an advantage that can prevent the risk of impact that may occur in the wrong seating state in advance.

Therefore, the seat device according to the present invention can maximize the comfort of the seat by enabling the vehicle seat device according to the present invention to actively support the passenger in accordance with the seating position of the passenger.

FIG. 6 conceptually shows a circuit diagram of the comparison determination unit 31 and the motor driving unit 32 constituting the control unit 30 of the present invention. The control unit 30 configured as described above includes the headrest rotating unit 40. It is possible to control the motor 42 or the seatback driving means 26 of. As shown in Fig. 6, the signal output from the distance sensing means 35 and 36 is input to the control circuit. The motor driving unit passes through the comparison unit 31 constituting the control unit 30 by the detection signals S1 and S2 of the distance detecting means 35 and 36 which detect the gap between the head of the seat and the headrest 10. It is input to the (Mortor Driving Unit) 32 to control the operation of the motor 42 or the seatback driving means 26 of the headrest rotation means 40 in accordance with the operation of the relay switch.

If the distance measured by the distance sensing means 35 and 36 in the present invention is 0 to 4 cm, the force distance sensing means 35 and 36 output a signal of (0, 0), and the measured distance is If 4 ~ 6cm to output a signal of (1,0), and if the measurement distance is more than 6cm to output a signal of (1,1), the controller 30 constituting the present invention using the AND gate and the NOR gate The comparative determination part 31 of Fig. 3 is shown as an exemplary form. However, the present invention is not limited to these exemplary embodiments, and may be substituted with various other components for the same purpose and effect as the technical configuration of the present invention.

In the present invention, in order to measure the distance between the head of the occupant (passenger) and the headrest, and the distance between the shoulder of the occupant (passenger) and the upper seatback 20b, ultrasonic waves are detected by the distance sensing means 35 and 36. Most preferably, the sensor is mounted. Conventionally, infrared sensors and ultrasonic sensors have been developed as distance measuring sensors. Infrared sensors have the advantage of being cheaper than ultrasonic sensors, but due to the use of infrared light, they are affected by illuminance and color. Therefore, when the infrared sensor is applied as the distance detecting means 35 and 36, the measured value changes according to the illumination of the inside of the vehicle, and there is a problem that accurate distance measurement is difficult when the black hair or the black clothes are worn. On the other hand, the ultrasonic sensor has a disadvantage that it is expensive compared to the infrared sensor, but the ultrasonic sensor was used because it is recognized as stability because it is already used as a car parking radar in abnormal life without being affected by illuminance and color. However, in the case of the ultrasonic sensor, the ultrasonic wave is detected by the distance sensing means 35 and 36 in the present invention in order to solve the problem that accurate distance measurement is difficult in the case of the perm hair and the curly hair due to the shape of the sound wave reaching surface. Adopt a sensor, but by installing the ultrasonic sensor on the stay (11) for supporting the head rest 10 without installing in the head rest, so that the ultrasonic sensor is irradiated to the neck and back, which is a flat part of the human body, the disadvantage of the ultrasonic sensor I tried to overcome.

However, the range of the distance detecting means 35 and 36 in the present invention is not limited to the ultrasonic sensor, and the object of the present invention is measured by measuring the distance between the seat and the headrest or the distance between the seat and the upper seatback. And if it is a technical configuration that can achieve the same effect and effect substantially the same as the effect will naturally be included in the scope of the present invention.

As shown in FIG. 6, when the distance between the seat and the headrest is measured by an ultrasonic sensor at 0 to 4 cm, the comparison determination unit 31 that receives the signal of (0,0) is connected to the AND gate ( A signal of 0) is output from the NOR gate and the relay switch ② and relay switch ③ of the motor drive section are operated. Therefore, the motor 42 of the headrest pivoting means 40 connected to the motor driving part 32 is driven, and the headrest 10 moves in a direction away from the head of the seat (rear).

If the measurement distance is 4 ~ 6cm, the ultrasonic sensor outputs a signal of (1,0), and the signal of (0) at the AND gate and (0) at the NOR gate of the comparison judgment unit 31 receiving the signal. Do not operate the relay switch by outputting Thus, the headrest rotating means 40 does not operate and maintains the current state.

If the measured distance is 6 ~ ∞cm, the ultrasonic sensor outputs the signal of (1,1), the signal of (1) is output from the AND gate, and the signal of (0) is output from the NOR gate. Activate relay switch④. Therefore, the motor 42 of the headrest pivoting means 40 connected to the motor driving part 32 is driven in the opposite direction, and the headrest 10 moves in a direction (forward) in close contact with the head of the seat.

As described above, the relay switches ② and ③ operate simultaneously with the signals output from the comparison determination unit 31 of the control unit, and the relay switches ① and ④ operate simultaneously to control the driving of the motor. 40) moves forward and backward so that it is close to or away from the passenger.

The configuration of the control unit is also applied to the seatback driving means 26 provided between the upper seatback 20b and the lower seatback 20a as it is, and the diffraction mechanism 25 rotates by the operation of the seatback driving means 26. While the upper seatback 20b is rotated relative to the lower seatback 20a, the upper seatback 20b is operated to be in close contact or away from the shoulder of the seat.

Furthermore, the control unit 30 according to the present invention further includes a selection switch for selecting a manual operation mode and an automatic mode, so that the distance detection is performed in a normal state in which a passenger (or driver) sits in an engine start state. The headrest pivoting means 40 and the seatback drive means 26 are actuated automatically in accordance with the signals input by the means 35 and 36 to maintain the proper distance from the seat, while in certain cases necessary The headrest pivoting means 40 and the seatback driving means 26 are not automatically operated according to the above, and the headrest pivoting means 40 or the seatback driving means 26 can be driven by operating an operation switch. By doing so, the user's convenience can be further maximized.

In addition, when driving in the manual mode, it may be particularly dangerous for the occupant, so that the controller may be connected with the ECU of the vehicle so that the controller receives a signal from the ECU in order to further increase the safety of the occupant while driving the vehicle. The control unit controls the mode automatic switching switch when the vehicle driving speed exceeds the reference value by additionally configuring a mode automatic switching switch in the control unit. It is necessary to force to switch to the automatic mode so that the distance between the occupant and the headrest and the distance between the occupant and the seatback are automatically maintained at an appropriate interval during high speed driving at all times. The seat device for a vehicle according to the present invention configured as described above has a seatback and headrest automatically moved to an appropriate position, especially during high speed, even when the driver or passenger is set to an inappropriate position by mistake or error. It can be moved and reset, further increasing the occupant's safety.

In particular, a recent automobile can receive a variety of useful information from the ECU as the performance of the ECU is sharply improved, as shown in Figure 7, the control unit 30 according to the present invention is a dangerous situation signal from the ECU (E.g., a rapid acceleration signal or a rapid deceleration signal, etc.), and when such a signal is transmitted to the controller, it is determined that a collision or collision has occurred and thus the distance between the head of the seat and the head rest and By operating the headrest pivoting means 40 and the seatback driving means 26 so that the distance between the shoulder of the seat and the upper seatback 20b is minimized, the seated person is brought into close contact with the seat and the headrest, thereby injuring the occupant. It can also be configured to minimize.

At the moment of the accident, the optimal distance between the passenger's head and the headrest and the passenger's back and seat back 20a should be 0cm, but the optimum distance (4 ~ 6cm) can satisfy both safety and convenience in normal times. By maintaining a shorter interval at the time of the accident, it will be possible to obtain a further effect to reduce the injury caused by the accident of the occupant even more.

As described above, the vehicle seat apparatus according to the present invention has described preferred embodiments with reference to the detailed description and the accompanying drawings, and is not limited to the above embodiments in the scope of the present invention, and those skilled in the art will configure the present invention. Even if some of the elements are changed or modified, it should be regarded as falling within the scope of the present invention as long as they have substantially the same purpose and the same effect as the configuration of the present invention.

As described above, the vehicle seat apparatus according to the present invention has a headrest (headrest) and the backrest (seatback) by the sensor signal detecting the position of the head and shoulder distance (4 ~) to ensure the safety of the passengers 6 cm) to move naturally. If the passenger's head and backrest are too far apart, the backrest will move in the direction of the passenger; conversely, if the backrest is in contact with the person or is too close, the sensor will detect this and secure the passenger's safety. It is possible to move back to the distance (about 4 ~ 6cm) does not feel uncomfortable.

The vehicle seat apparatus according to the present invention can effectively prevent the neck injury of the seated person in the event of a collision or rear collision, and also can actively support the head and shoulders of the passenger (seater) according to the seating position of the passenger. Thus, the comfort of the seat can be maximized.

Furthermore, even if the driver or occupant is accidentally or accidentally set up the seatback or headrest in an improper position, the seatback and headrest may be moved and reset to the proper position automatically during high-speed driving, thereby ensuring the safety of the occupant. It can be further increased to be a very useful invention in the automotive industry.

In particular, the seatback 20 divided into an upper seatback and a lower seatback automatically supports the back according to the seated position of the seat by the diffraction mechanism, and thus plays a big role in improving the seat comfort by greatly assisting in improving seat comfort. In addition, it is expected that the safety can be increased to satisfy the needs of consumers.

Claims (6)

delete delete delete delete delete A headrest 10 supported by the stay 11 on the seatback 20 of the vehicle; Distance detecting means (35) installed on the headrest (10) or stay (11) and detecting a distance between the head restraint of the seat and the headrest; Headrest rotation means (40) driven according to a predetermined control signal and moving the headrest (10) in the head direction of the driver; And a controller 30 which determines a distance between the head of the driver and the headrest and outputs a signal corresponding thereto to the rotation means 40 to control the movement of the headrest. The control unit 30 continuously receives the signal value from the distance detecting means 35 at set unit time intervals, and determines whether the received value corresponds to the set value, and sets the headrest rotating means 40. In the vehicle seat apparatus for controlling so that the distance between the head of the seat and the headrest is always maintained by controlling in real time, The seatback 20 is divided into a lower seatback 20a coupled to the seat cushion by a recliner and an upper seatback 20b coupled to the headrest, The upper seatback 20b is provided with a second distance sensing means 36 for detecting the distance between the upper seatback 20b and the shoulder of the seater. The upper seatback and the lower seatback are rotatably coupled back and forth by a diffraction mechanism 25, and further includes seatback driving means 26 for operating the diffraction mechanism 25, The control unit is configured to be coupled to the ECU of the vehicle, The control unit further includes a selection switch for selecting a manual operation mode and an automatic mode, An operation switch for manually operating the headrest rotating means or the seatback driving means when the selection switch of the controller is in the manual operation mode, If it is determined that the speed value of the vehicle input from the ECU exceeds the reference value, the control unit is further provided with a mode automatic switching means for switching the mode selection switch set to the manual operation mode to the automatic mode, The distance sensing means (35) and the second distance sensing means (36) is a vehicle seat apparatus, characterized in that the ultrasonic sensor.

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