KR20220046091A - Seat belt automatic fastening device for vehicle - Google Patents

Abstract

The present invention relates to a device for automatically fastening a seat belt for a vehicle, which enables a seat belt to be automatically fastened for the elderly, the weak, or the disabled sitting on a seat in a vehicle. The device for automatically fastening a seat belt for a vehicle according to the present invention comprises: webbing having a plurality of electromagnets attached thereto; a tongue mounted on an end portion of the webbing and made of a metal material; and a buckle having an electromagnetic plate where the tongue can be attached by magnetism, wherein an electric current is applied to the electromagnets of the webbing and the electromagnetic plate of the buckle to enable the seat belt to be automatically fastened. Therefore, for an autonomous vehicle to be released in the future, when the weak and elderly or the disabled ride therein without any fellow passenger, the seat belt can be readily fastened to enhance convenience and safety of passengers.

Description

Seat belt automatic fastening device for vehicle

The present invention relates to a device for automatically fastening a seat belt for a vehicle, and more particularly, to a device for automatically fastening a seat belt for a vehicle so that the seat belt can be automatically fastened in consideration of passengers such as the elderly or the disabled who are seated in a seat in a vehicle. it's about

In preparation for the launch of an autonomous vehicle capable of driving without the driver's control, independent seats that can swivel and move are being developed for conversations and meetings between passengers, relaxation and sleeping, and assistance with getting on and off.

In such a seat, a retractor for drawing out the webbing is directly installed at the upper end of the seat in consideration of the swivel and movement of the seat.

Accordingly, the passenger seated in the seat can wear the seat belt by directly pulling the webbing from the retractor and fastening the tongue of the pulled webbing to the buckle.

However, in the case of the elderly or the handicapped, since it is difficult to fasten the seat belt by themselves, they have no choice but to wear the seat belt with the help of passengers.

Furthermore, in the case of an autonomous vehicle to be released in the future, it is possible to drive to the destination even if the elderly or the disabled ride alone without a passenger, but there is a problem in that it is impossible to wear a seat belt for safety.

Therefore, in preparation for the release of a fully autonomous vehicle in the future, a method for automatically fastening the seat belt for the elderly or the disabled is required.

The present invention has been devised in view of the above points, and it is to provide an automatic fastening device for a seat belt for a vehicle that enables the seat belt to be automatically fastened in consideration of passengers such as the elderly or the disabled who are seated in a seat in a vehicle. There is this.

In order to achieve the above object, the present invention provides: a retractor housing that is provided with a structure in which a webbing outlet is formed and is mounted on the upper end of the seatback; a retractor mounted within the retractor housing; a webbing provided with a structure in which a plurality of electromagnets are attached along the longitudinal direction and wound so as to be drawn out on the drum of the retractor; a driving motor connected to the rotating shaft of the drum; a tongue made of metal mounted to an end of the webbing; a buckle provided with an electromagnet plate so that the tongue is attached by magnetic force and mounted on a side of the seat cushion; an input unit for selecting and inputting a manual fastening mode or an automatic fastening mode of the seat belt; and a controller for applying current to the electromagnet of the webbing and the electromagnet plate of the buckle, including the driving motor, when the automatic fastening mode is selected. It provides an automatic fastening device for a seat belt for a vehicle, characterized in that it comprises a.

The plurality of electromagnets are arranged along the longitudinal direction at both ends of the webbing, and are attached to each other by a magnetic force according to the current application signal of the controller to impart rigidity to the webbing.

It is mounted on the inside of the retractor housing, characterized in that it further comprises a webbing guide device for adjusting the pull-out height and angle of the webbing drawn out from the retractor to the webbing outlet.

Preferably, the webbing guide device includes: a motor mounted on a bottom surface of the retractor housing; a pinion connected to the rotation shaft of the motor; a rail mounted within the retractor housing; a rack bar that is inserted into the rail while being engaged with the pinion to be elevating; and a guide bar attached to an upper end of the rack bar and in contact with a bottom surface of the webbing. It is characterized in that it is composed of

It is characterized in that the buckle and the tongue are equipped with an infrared sensor that recognizes the position of each other and transmits a sensing signal to the controller for maintaining a distance from the passenger's body.

The seat belt automatic fastening device of the present invention further comprises a camera mounted at a predetermined position in front of the seat to photograph the body shape of a seated passenger and transmit the image to the controller.

A locking bar for locking a tongue attached to the electromagnet plate is rotatably mounted on both upper sides of the buckle, and an actuator is mounted on a rotation shaft of the locking bar.

A trigger that is pressed by the tongue when the tongue is attached to the electromagnet plate is mounted on the inlet portion of the buckle, and a controller that receives the trigger pressing signal applies a driving signal to the actuator.

Through the means for solving the above problems, the present invention provides the following effects.

First, by allowing the seat belt to be automatically fastened according to the body shape of the seated passenger, vehicle convenience and commercialization can be improved.

Second, since it is difficult for the elderly or the handicapped to directly fasten the seat belt, it is possible to automatically fasten the seat belt, thereby improving the convenience of wearing the seat belt.

Third, in the case of an autonomous vehicle to be released in the future, even if the elderly or the disabled ride alone without a passenger, the seat belt can be automatically fastened, thereby improving passenger safety.

1 is a side cross-sectional view showing an automatic fastening device for a seat belt for a vehicle according to the present invention;
2 is an enlarged view of a main part showing a webbing structure of an automatic fastening device for a seat belt for a vehicle according to the present invention;
3 is a side cross-sectional view showing a state in which the webbing of the automatic fastening device for a vehicle seat belt according to the present invention is drawn out;
4 is a front view showing a state in which the webbing of the automatic fastening device for the seat belt for a vehicle according to the present invention is drawn out;
5 is a view showing a state before the tongue of the automatic fastening device for the seat belt for a vehicle according to the present invention is fastened to the buckle;
6 is a view showing a state after the tongue of the automatic fastening device for the seat belt for a vehicle according to the present invention is fastened to the buckle;
7 is a side cross-sectional view showing a state in which the webbing withdrawal height and angle of the automatic seat belt fastening device for a vehicle according to the present invention are adjusted;
8 is a flowchart illustrating an operation sequence of the automatic seat belt fastening device for a vehicle according to the present invention.
9 is a control configuration diagram for the operation of the automatic seat belt fastening device for a vehicle according to the present invention.

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

1 is a side cross-sectional view showing an automatic seat belt fastening device for a vehicle according to the present invention, and reference numeral 20 denotes a retractor housing.

The retractor housing 20 is a housing in which a known retractor for pulling out and restraining the seat belt is installed, and unlike generally mounted inside a body trim or on a body floor, a seat back ( 10) is mounted on one side of the top.

A webbing outlet 22 for entering and exiting the webbing 40 is formed through the front portion of the retractor housing 20 .

A retractor (30, Rretractor) for drawing out and restraining webbing is fixedly mounted inside the retractor housing (20).

Preferably, the retractor 30 is mounted at an angle in which the webbing 40 automatically drawn out through the webbing outlet 22 faces toward the buckle 60 in the diagonal direction.

To this end, a webbing 40 of a predetermined length is wound on the drum 32 of the retractor 30 , and a driving motor 36 for automatically withdrawing the webbing 40 is provided on the rotating shaft 34 of the drum 32 . is installed

Accordingly, since the retractor 30 is mounted at an angle toward the buckle 60 in the diagonal direction, when the rotating shaft 34 and the drum 32 are rotated by the driving of the driving motor 36, the drum The webbing 40 wound around 32 may be drawn out toward the buckle 60 through the webbing outlet 22 .

At this time, a tongue 50 in the shape of a metal disc or a ball attached to the end of the webbing 40 is mounted, and the tongue 60 is attached to the buckle 60 by magnetic force, as will be described later. ) can be entered into.

In particular, the webbing 40 is normally bent and bent freely like a well-known woven webbing, but in order to automatically fasten the seat belt, hard rigidity must be provided for smooth movement up to the buckle 60. .

To this end, as shown in FIG. 2 , the webbing 40 is provided in a structure in which a plurality of electromagnets 42 are attached along its longitudinal direction.

More specifically, by attaching a plurality of electromagnets 42 in flat rectangular pieces along the longitudinal direction to both ends of the webbing 40 during webbing weaving, magnetic force according to the current application signal of the controller 80 The rigidity is imparted to the webbing 40 while being attached to each other.

Preferably, the plurality of electromagnets 42 are interconnected by a conductive wiring line during webbing weaving, and a wiring connector connected to a power supply means is mounted on the drum 32 of the retractor 30, etc. When the wiring line is connected to the wiring connector, current can be applied to the plurality of electromagnets 42 .

Accordingly, as shown in (a) of FIG. 2 , if the plurality of electromagnets 42 only contact each other and are not attached to each other by magnetic force and are freely movable, the webbing 40 is generally woven as is well known. It can be bent and bent freely like webbing, whereas, as shown in FIG. Rigidity may be imparted.

On the other hand, when the webbing 40 is directed from the retractor 30 to the buckle 60, there is a possibility that an interference phenomenon may occur depending on the body type of the passenger. The pull-out height and pull-out angle of the webbing 40 drawn out through the webbing outlet 22 should be adjusted.

To this end, a camera 90 that captures the body shape of a seated passenger and transmits it to the controller 80 is mounted at a predetermined position (eg, headlining) in front of the seat, and the tongue 50 and the buckle 60 Infrared sensors 52 and 62 for recognizing each other's positions and transmitting a sensing signal for maintaining a distance from the passenger's body to the controller 80 are mounted.

In addition, a webbing guide device 70 for adjusting the withdrawal height and angle of the webbing 40 drawn out from the retractor 30 to the webbing outlet 22 is mounted inside the retractor housing 20 .

Accordingly, the webbing guide device 70 operates according to the control signal of the controller 80 that has received the signals from the camera 90 and the infrared sensors 52 and 62 so that the height and angle of the webbing 40 are drawn out. It can be adjusted to a level to maintain a distance from the body of the passenger.

As shown in FIG. 1, the webbing guide device 70 includes a motor 71 mounted on the bottom surface of the retractor housing 20, and a pinion 72 connected to the rotation shaft of the motor 71, A rail 73 mounted in the vertical direction in the retractor housing 20, a rack bar 74 that is inserted into the rail 73 while being engaged with the pinion 72, and the upper end of the rack bar 74 It may be configured to include a guide bar 75 that is attached to the bottom surface of the webbing (40).

Therefore, when the controller 80 determines that the body type of the seated passenger is larger than the standard based on the captured image signal of the camera 90, the controller 80 rotates the motor 71 in one direction. When the pinion 72 rotates in one direction by applying a control signal for The pull-out height and pull-out angle of (40) can be increased and adjusted.

Alternatively, based on a sensing signal of the infrared sensor 52 mounted on the tongue 50 in the controller 80 (eg, a light reception signal of infrared rays reflected by irradiating the passenger's body), the controller 80 communicates with the body of the seated passenger. When the distance is small compared to the reference, when the pinion 72 rotates in one direction by applying a control signal for one-way rotation to the motor 71 from the controller 80, the rack bar 74 rises and the guide bar By lifting the webbing 40 as 75 rises, as shown in FIG. 3 , the pull-out height and pull-out angle of the webbing 40 can be increased and adjusted to increase the distance from the passenger's body to a reference value.

On the other hand, when the controller 80 determines that the body type of the seated passenger is smaller than the standard based on the captured image signal of the camera 90, the controller 80 moves the motor 71 in the other direction. When the pinion 72 is rotated in the other direction by applying a control signal for rotation, the webbing 40 is lowered while the rack bar 74 is lowered and the guide bar 75 is lowered while the webbing 40 is lowered. The pull-out height and pull-out angle of the can be adjusted to decrease.

On the other hand, the buckle 60 is provided with an electromagnet plate 61 attached so that the tongue 50 is attached by magnetic force at a predetermined internal position where the tongue 50 is inserted and fastened, so that the side of the seat cushion 12 is is mounted on

In addition, as shown in FIGS. 5 and 6 , a locking bar 64 for locking the tongue 50 attached to the electromagnet plate 61 is rotatably mounted on both upper sides of the buckle 60 and , the actuator 66 is mounted on the rotating shaft of the locking bar 64 , and the tongue 50 is attached to the electromagnet plate 61 at the entrance of the buckle 60 , which is a trigger pressed by the tongue 50 . (68, Trigger) is installed.

Accordingly, when the tongue 50 is inserted into the buckle 60 while pressing the trigger 63 and attached to the electromagnet plate 61 by magnetic force, a trigger signal according to the pressing of the trigger 68 is generated by the controller 80 By applying a driving signal to the actuator 66 from the controller 80 that is transmitted to and received the trigger signal, the locking bar 64 rotates inwardly as shown in FIG. Since the tongue 50 is locked while being in close contact, it is possible to prevent the tongue 50 from being separated from the buckle 60 .

Meanwhile, in the seat belt automatic fastening device of the present invention, as shown in FIG. 8 , a manual fastening mode of the seat belt (manual fastening in which the passenger directly pulls the webbing and fastens the tongue to the buckle) or an automatic fastening mode can be selected. , and an input unit 92 for transmitting the selection input signal to the controller 80 .

Preferably, the input unit 92 may be adopted as an AVN (Audio, Video, Navigation) system mounted as an in-vehicle infotainment device, and the user selects a menu displayed on the display of the AVN system to automatically fasten the seat belt. If you select ON, the automatic seat belt fastening mode may be selected, and if you select OFF for the automatic seat belt fastening mode, the manual seat belt fastening mode is maintained.

Here, an operation flow of the seat belt automatic fastening device of the present invention having the above configuration is as follows.

8 is a flowchart illustrating an operation sequence of the automatic seat belt fastening apparatus for a vehicle according to the present invention, and FIG. 9 is a control configuration diagram for the operation of the automatic seat belt automatic fastening apparatus for a vehicle according to the present invention.

First, the seat belt automatic fastening mode is selected as ON through the input unit 92 (S101).

Next, when the camera 90 transmits an image signal photographing a seated passenger to the controller 80, the controller 80 analyzes the passenger size and posture based on the image captured by the camera (S102).

As described above, when the controller 80 determines that the body type of the seated passenger is larger than the standard based on the captured image signal of the camera 90, the controller 80 controls the motor 71 When the pinion 72 rotates in one direction by applying a control signal for one-way rotation to As can be seen, the pull-out height and pull-out angle of the webbing 40 can be increased and adjusted.

On the other hand, when the controller 80 determines that the body type of the seated passenger is smaller than the standard based on the captured image signal of the camera 90, the controller 80 moves the motor 71 in the other direction. When the pinion 72 is rotated in the other direction by applying a control signal for rotation, the webbing 40 is lowered while the rack bar 74 is lowered and the guide bar 75 is lowered while the webbing 40 is lowered. The pull-out height and pull-out angle of the can be adjusted to decrease.

Then, the drive motor 36 is rotationally driven by the current application signal of the controller 80 to rotate the drum 32 , so that the webbing 40 is pulled out from the drum 32 of the retractor 30 . starts (S103).

At this time, since the retractor 30 is mounted at an angle facing the buckle 60 in the diagonal direction, when the rotating shaft 34 and the drum 32 are rotated by the driving of the driving motor 36, the drum The webbing 40 wound around 32 may be drawn out toward the buckle 60 through the webbing outlet 22 .

Subsequently, a current is applied to the electromagnets 42 of the webbing 40 by the control signal of the controller 80, so that the electromagnets 42 are magnetized and attached to each other by magnetic force at the same time, so that the webbing 40 is rigid. This provided webbing hardening is made (S104).

Accordingly, as shown in FIGS. 3 and 4 , the webbing 40 is drawn out through the webbing outlet 22 in a rigid state, and at the same time is easily lowered toward the buckle 60 .

At this time, based on the sensing signal of the infrared sensor 52 mounted on the tongue 50 in the controller 80 (eg, a light reception signal of infrared rays reflected by irradiating the passenger's body) with the body of the seated passenger It is determined whether the distance of is maintained as a reference distance (eg, 30 mm) (S105).

As a result of the determination, when the distance to the body of the seated passenger is smaller than the reference, the webbing may come into contact with the body and may interfere. Thus, when the pinion 72 rotates in one direction, the rack bar 74 rises and the guide bar 75 rises while lifting the webbing 40, thereby increasing the pull-out height and pull-out angle of the webbing 40. can be adjusted, thereby increasing the distance between the webbing 50 and the passenger's body to a reference value.

Accordingly, after the webbing 40 is pulled out through the webbing outlet 22 in a rigid state, it is easily lowered toward the buckle 60 without interference with the passenger's body.

At this time, an infrared sensor 52 is attached to the tongue 50 mounted on the end of the webbing 40 , and an infrared sensor 62 is also attached to the buckle 60 , and each infrared sensor senses each other by sensing. The position and distance between them can be easily recognized.

Accordingly, when the distance between the infrared sensors 52 and 62 through sensing in the controller 80 is determined as the proximity distance exerted by the magnetic force, the electromagnet of the buckle 60 by the control signal of the controller 80 A current is applied to the plate 61 and maintained in a magnetized state (S106).

Accordingly, when the tongue 50 of the webbing 40 comes within the proximity distance of the buckle 60, the tongue 50 attaches to the electromagnet plate 61 of the buckle 60, thereby firstly automatically fastening the seat belt. This is completed (S107).

At this time, when the tongue 50 is inserted into the buckle 60 and attached to the electromagnet plate 61 by magnetic force, the trigger 63 at the entrance of the buckle 60 is pressed, and the trigger 63 is pressed. A corresponding trigger signal is transmitted to the controller 80 , and the controller 80 receiving the trigger signal applies a driving signal to the actuator 66 .

Accordingly, the locking bar 64 rotates inwardly by the rotational driving of the actuator 66 and locks the tongue 50 to prevent separation while being in close contact with the rear of the tongue 50, so that the automatic seat belt fastening is finally completed. is completed (S108).

When the automatic seat belt fastening is completed, that is, after the controller 80 applies a driving signal to the actuator 66 and then releases the current application to the electromagnet 42, the plurality of electromagnets 42 are connected to each other. The webbing 40 is in a state in which it can freely move without being attached by magnetic force only by contact, and accordingly the webbing 40 is in a state in which it can be freely bent and bent, so that the upper body of the passenger can be easily protected by the webbing 40. can

On the other hand, when the vehicle arrives at the destination, that is, when a destination arrival signal is given to the controller 80 in the AVN system, the locking bar 64 is released by reverse rotation of the actuator 66 by the control signal of the controller 80 . direction and at the same time as the application of current to the electromagnet plate 61 is released, the drum 32 of the retractor 30 is rotated in reverse by an elastic restoring force such as a return spring while winding the webbing 40 at the same time. The seat belt is automatically released such that the tongue 50 is raised to its original position.

As seen above, by allowing the seat belt to be automatically fastened to suit the body shape of a seated passenger, such as the elderly or the disabled, and without the assistance of a passenger, vehicle convenience and marketability can be improved.

10: seat back 12: seat cushion
20: retractor housing 22: webbing outlet
30: retractor 32: drum
34: rotation shaft 36: drive motor
40: webbing 42: electromagnet
50: tongue 52: infrared sensor
60: buckle 61: electromagnet plate
62: infrared sensor 64: locking bar
66: actuator 68: trigger
70: webbing guide device 71: motor
72: pinion 73: rail
74: rack bar 75: guide bar
80: controller 90: camera
92: input unit

Claims (8)

a retractor housing that is provided in a structure in which a webbing outlet is formed and is mounted on the upper end of the seatback;
a retractor mounted within the retractor housing;
a webbing provided with a structure in which a plurality of electromagnets are attached along the longitudinal direction and wound so as to be drawn out on the drum of the retractor;
a driving motor connected to the rotating shaft of the drum;
a tongue made of a metal mounted on an end of the webbing;
a buckle provided with an electromagnet plate so that the tongue is attached by magnetic force and mounted on a side of the seat cushion;
an input unit for selecting and inputting a manual fastening mode or an automatic fastening mode of the seat belt; and
a controller for applying a current to the electromagnet of the webbing and the electromagnet plate of the buckle, including the driving motor, when the automatic fastening mode is selected;
A seat belt automatic fastening device for a vehicle, characterized in that it comprises a.
The method according to claim 1,
The plurality of electromagnets are arranged along the longitudinal direction at both ends of the webbing, and are attached to each other by a magnetic force according to a current application signal from the controller, thereby imparting rigidity to the webbing.
The method according to claim 1,
and a webbing guide device mounted inside the retractor housing to adjust a height and angle of the webbing drawn out from the retractor to the webbing outlet.
3. The method according to claim 2,
The webbing guide device comprises:
a motor mounted on a bottom surface of the retractor housing;
a pinion connected to the rotation shaft of the motor;
a rail mounted within the retractor housing;
a rack bar that is inserted into the rail while being engaged with the pinion to be elevating; and
a guide bar attached to an upper end of the rack bar and in contact with a bottom surface of the webbing;
An automatic fastening device for a seat belt for a vehicle, characterized in that it consists of.
The method according to claim 1,
The automatic seat belt fastening device for a vehicle, characterized in that the buckle and the tongue are equipped with an infrared sensor that recognizes the position of each other and transmits a sensing signal to the controller for maintaining a distance from the passenger's body.
The method according to claim 1,
The automatic seat belt fastening device for a vehicle, characterized in that it further comprises a camera mounted at a predetermined position in front of the seat, photographing the body shape of the seated passenger and transmitting the image to the controller.
The method according to claim 1,
A locking bar for locking a tongue attached to the electromagnet plate is rotatably mounted on both upper sides of the buckle, and an actuator is mounted on a rotating shaft of the locking bar.
8. The method of claim 7,
A trigger pressed by the tongue when the tongue is attached to the electromagnet plate is mounted on the inlet portion of the buckle, and a controller receiving the trigger pressing signal applies a driving signal to the actuator. fastening device.

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