JPS62238144A - Seat belt device - Google Patents

Abstract

PURPOSE:To easily take a tongue by providing a detecting part for detecting the push out quantity of a seat belt and pushing out said seat belt up to a position corresponding to a variable set position of a seat. CONSTITUTION:When a rider is seated on a seat 1, a seat switch SW6 is turned on and a timer T1 is operated and, after a certain time, a timer switch SW7 is shifted to a contact (b) to rotate a motor 13. And, a slide arm 5 is driven forward and a seat belt 2 is pushed out in the forward direction of a vehicle. Then, as an arm switch 16 is turned off, the timer T1 is turned off to stop the rotation of the motor 13. The moved position of the slide arm 5 at this time corresponds to a position where a tongue 2A can be easily taken when the seat 1 is in a neutral position. Thereby, the rider can easily take the tongue 2A which is fed to the side of the seat 1.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a seat belt device attached to a vehicle, and more specifically to a seat belt device installed diagonally behind a seat. Regarding the improvement of technology that makes it easier.

(Prior art) Examples of conventional technologies for making this type of seatbelt easy to remove include JP-A-57-198143 and JP-A-56.
There is one described in Japanese Patent No.-12748.

In these techniques, a seat belt equipped with a tongue is pushed out straight from the rear of the seat toward the front of the vehicle, so that an occupant seated on the seat can easily catch the tongue.

The pushing out of the seat belt is performed after the vehicle door is closed, and when the engagement between the buckle and the tongue is detected, the seat belt is returned to its original position.

(Problems to be Solved by the Invention) By the way, in conventional seatbelt devices of this type, the amount of extrusion of the seatbelt is constant.

However, seat positions have traditionally been changed, for example in the driver's seat, in order to ensure the proper driving posture of the occupants.
Since the seat belt is variably set in the longitudinal direction of the vehicle, there is a problem in that even though the seat belt is pushed forward, the position of the seat is variably set, making it difficult to remove the tongue at all.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention provides a seatbelt device in which the tongue is always set at a position where it is easy to remove by controlling the amount of thrust of the seatbelt according to the set position of the seat. It is an object.

[Structure of the Invention] (Means for Solving Problems) The present invention includes a moving member that pushes out and moves the seat belt, a first detection unit that detects the variable setting position of the seat, and a moving member that moves the seat belt by pushing it out, and a first detection unit that detects the variable setting position of the seat. The seat belt is pushed out to an appropriate position according to the variable setting position of the seat by varying the drive amount of the second detection unit that detects the detection and the drive unit that drives the moving member based on the outputs of both detection units. The drive controller includes a drive control section that controls the drive control.

(Function) The first detecting section detects the variable setting position of the seat, and the second detecting section detects whether the seat belt has been pushed out to an appropriate position preset for this seat position. The first step is to check whether the seat belt has been fed to the appropriate position according to the variable setting position of the seat. It can be detected by the output of the second detection section. Therefore, the drive control section is the first.
By varying the drive amount of the drive unit based on the output of the second detection unit, it is possible to control the seat belt so that it is always supplied and driven to an appropriate position even if the seat position changes. Note that since the amount of push-out of the seat belt and the amount of movement of the movable member are in a proportional relationship, the amount of pull-out of the seat can be detected based on the movement position of the movable member.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are schematic explanatory diagrams showing the basic configuration of this embodiment, respectively.

In the figure, reference numeral 1 indicates, for example, a seat on the driver's side, and as is well known, its position can be variably set in the longitudinal direction of the vehicle (in the direction of the arrow shown in FIG. 1). 2 is tongs (
(not shown in FIGS. 1 and 2), and is supported inside the pillar part 3 of the vehicle so as to be freely drawn out. Reference numeral 5 designates a slide arm as a moving member, which is provided with a belt hanger 4 at its tip, and is configured to slide along the arm's longitudinal direction by driving a motor to be described later.

As shown in FIG. 2, the amount of movement of the slide arm 5 (=the amount of seatbelt thrust) is controlled according to the set position of the seat 1.

Next, FIG. 3 shows details of the drive mechanism of the slide arm 5 and its position detection device (second detection section).

This will be explained with reference to FIG. 4 (al~(C1).

The slide arm 5 is provided with a rank gear 10 along its longitudinal direction. Further, this slide arm 5 is supported by a guide body 11 so as to be slidable along its longitudinal direction. The guide body 11 is formed in a U-shape, and the rank gear 1 is provided in the central space of the guide body 11.
A pinion gear 12 that meshes with 0 is arranged. This pinion gear 12 is configured to be reversibly rotated at that position by the drive of a motor (driver) 13. Therefore, the rotation of this pinion gear 12 causes the slide arm 5 to rotate.
is adapted to move along its longitudinal direction. The belt hanger 4 disposed at the tip of the slide arm 5 is formed in a U-shape as shown in the figure, and holds the seat belt 2 at a position below the tongue 2A by movement of the slide arm 5. It is supposed to be done.

As a second detection unit that detects the moving position of the slide arm 5, a limit switch 14 and slide arm switches 15 and 1 are installed along the moving direction of the slide arm 5.
6.17 is provided. Each of these switches is
Each of the limit switches 14 is composed of, for example, a microswitch, and is turned on when the operating end (not shown) of the slide arm 5 reaches the most retracted position, thereby activating a relay R1 to be described later. The slide arm switches 15, 16 and 17 are provided, for example, in response to the case where the seat 1 can be variably set in its longitudinal position in three stages. The operating end 5A is for each switch 15.16.17
The movement position of the slide arm 5 can be detected from the combination of ON-OFF of each switch and ON-OFF of each switch. Note that 4th (a) to (C1) respectively indicate the front most position, neutral position, and rear most position of the slide arm 5.

Next, FIGS. 5 and 6(a) show a detection device (first detection section) for the variable setting position of the seat 1.

(This will be explained with reference to bl. In FIG. 5, a movable contact 20 that moves integrally with the sheet 1 is provided on the lower surface of the sheet 1. On the other hand, this movable contact 20
The moving path includes fixed contacts 21 . corresponding to the variable setting positions of the seat 1 . 22. 23 are arranged. The fixed contacts 21, 22, and 23 and the movable contacts 20 are connected to the seat position switches SWI, SW2, . It constitutes SW3. In addition, FIG. 5 shows the case where the seat 1 is in the front most position, and FIG. 6 +8) and (11) show the case where the seat 1 is in the neutral position and the rear most position, respectively.

Next, a drive control circuit for the motor 13 will be explained with reference to FIG. 7. In the figure, the limit switch 14 described above is used as a switch for controlling the drive of the motor 13. Arm switch 15-17. In addition to the seat position switches 5WI-3W3, the following switches are provided.

The door switch SW4 is a switch that is switched by opening and closing the door, and when the door is closed, the movable contact contacts contact a in the figure, and when the door is open, the movable contact contacts contact a. It is supposed to be done. The movable contact side of the door switch SW4 is connected to a power source, and the tongs 2A of the buckle switch SW5 are connected to and removed from a buckle (not shown; provided on one side of the seat 1). The movable contact contacts the contact a when engaged, and the movable contact contacts the contact a when engaged. The seat switch SW6 is a switch that is turned on when the occupant sits on the seat 1 and turned off when the occupant leaves the seat.A timer TI is connected between the switch SW6 and the ground terminal.
is inserted and connected. Then, the switch SW
5 and the switch SW6 are the arm switches 15 to 17 and the seat position switch SWI.
~SW3 are connected as shown in the figure. here,
Each of the seat position switches SWI to SW3 is turned on depending on the set position of the seat 1, and the arm switches 15 to 17 are used to set the slide arm 5 to the rear most position, neutral position, or front most position. These switches are turned off when the respective values are reached. The connection state of each switch is such that when the seat position switch SWI is in the ON state, the timer T1 is energized until the arm switch 17 is turned off, and when the seat position switch SW2 is in the ON state, the arm switch 16 is in the ON state. The timer TI is turned off until it is turned off.
When the seat position switch SW3 is in the ON state, the T-timer I is energized until the arm switch 15 is turned OFF.

Further, between the contact point of the buckle switch SW5 and the ground terminal, there is a connection between the rimiso [・switch 14] and the relay R.
1 are connected in series.

The above-mentioned timer T1 and relay R1 are for switching the timer switch SW7 and the υ race pin SW8 shown in the figure, respectively. The timer switch SW7 has a movable contact connected to one end of the motor 13, a contact a thereof is grounded, and a contact a is connected between the arm switch 17 and the seat switch SW6. On the other hand, the relay switch SW8 has its movable contact connected to the other end of the motor 13, the contact a is grounded, and the contact A is connected between the contact A of the buckle switch SW5 and the limit switch 14. and the timer switch S
W7 is configured such that its movable contact is switched from contact a to contact after a delay time S1 has elapsed after the timer T1 is energized. The relay switch SW8 is actuated by energizing the relay R1, and the movable contact is switched from the contact A to the contact G by the energization.
It's happening.

The operation of the apparatus constructed as above will be explained with reference to the timing chart shown in FIG.

Figure 8 shows that seat 1 is in the neutral position (Figure 6 (al)
FIG.

In the initial state, the seat position switch SW2 is ON and the other seat position switches SWI.

SW3 is OFF, limit switch 14 is OFF, and arm switches 15, 16, and 17 are all ON.

First, when the occupant opens the door, enters the vehicle, and closes the door, the movable contact of the door switch SW4 comes into contact with the contact a. After that, when the passenger sits on seat 1, the seat SW
6 is turned ON. At this time, since the tongue 2A and the buckle are not engaged, the movable contact of the buckle switch SW5 is in contact with the contact a, and the movable contact of the buckle switch SW5 is in contact with the contact a.
, the power supply voltage is applied to the timer T1 via the buckle switch SW5, the seat position switch 16-17, and the seat switch SW6.

Then, the timer TI is activated and, as shown in FIG. 8, after 31 hours have elapsed, the timer switch SW is
Switch the movable contact 7 so that it comes into contact with the contact. As a result, a closed circuit is formed from the power supply through contact b of timer switch SW7, motor 13, and contact a of relay switch SW8 to the ground terminal, and motor 13 is driven to rotate in the forward direction as shown in FIG. become.

When the motor 13 rotates forward, the pinion gear 12 shown in FIG. 3 rotates, and as a result, the slide arm 5 having the rack gear 10 meshing with the pinion gear 12 is driven forward. In addition, in this state limit switch 1
4 is turned ON as shown in FIG.

When the slide arm 5 is driven forward, the seat belt 2 is held by the belt hanger 4 at its tip.
After that, as the slide arm 5 moves, the seat belt 2
will be pushed toward the front of the vehicle.

Here, the switch 15 of the arm switches 15 to 17 is first turned off by the movement of the slide arm 5 (see FIG. 8).
Since F is unrelated to the above-mentioned closed circuit, the motor 13 will continue to be driven to rotate.

Next, when the arm switch 16 is turned off as shown in FIG.
The movable contact 7 is switched to contact contact a. As a result, the rotation of the motor 13 is stopped, and the pushing and supplying of the seat belt 2 is completed.

At this time, the movement position 1 of the slide arm 5 when the arm switch 16 is turned off corresponds to the seat belt supply position where the tongue 2A can be easily taken when the seat 1 is in the neutral position. . Therefore sheet 1
The occupant sitting on the seat can easily take the tongue 2A that has been supplied and moved to the side of the seat 1, and can quickly and easily put on the seat belt.

When the seat belt is fastened, that is, the tongue 2A and the buckle are fastened, the movable contact of the buckle switch SW5 is switched so as to come into contact with the contact. Also, at this time, since the limit switch 14 is turned on, the door switch SW4 and the buckle switch SW are connected to the power source.
5 and the limit switch 14, the relay R1 is energized. Then, relay switch SW8
Since the movable contact of timer switch SW7 is set to contact contact a, the movable contact of timer switch SW7 is set to contact contact a, so contact b1 of buckle switch SW5, contact b1 of relay switch SW8, and A closed circuit is formed through the contact b2 of the motor 13 and the contact a of the timer switch SW7 to the ground terminal, and the motor 13 is driven to rotate in reverse as shown in FIG.

When the motor 13 rotates in the reverse direction, the slide arm 5 is driven backward by the action of the binion gear 12 and rack gear 10. Then, when the slide arm 5 retreats to the initial position, the limit switch 14 is turned off as shown in FIG. 8, and the power supply to the relay R1 is cut off. As a result, the movable contact of the relay switch SW8 is switched to contact the contact a, and the power to the motor 13 is also cut off, so that the slide arm 5 is stopped at the initial position.

In this way, the series of operations of the slide arm 5 when the seat 1 is in the neutral position is completed.

The above operation example was explained when the seat 1 was in the neutral position, but when the seat 1 is set in the front most position and the rear most position, the forward movement of the slide arm 5 is , until the seat position switches 15 and 17 are turned off, so that the seat belt can be pushed and supplied to an appropriate position according to the set position of the seat 1.

In the embodiment described above, since the door switch SW4 and the seat switch SW6 are provided, it is possible to prevent malfunctions such as the slide arm 5 being driven forward when the door is opened or when the seat is not seated.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.

For example, in the above embodiment, the second detection section detects the position of the moving member 5, but it may also directly detect the amount of thrust of the seat belt.

Here, a modification of the present invention will be explained with reference to FIGS. 9 to 12. 9 and 10 show a modification of the position detection bag W (second detection section) of the slide arm 5, and FIG. 11 shows a modification of the position detection device (first detection section) of the seat 1. 12 shows a modification of the drive control circuit for the motor 13. In FIG.

In addition, in FIGS. 9 to 12, members having the same functions as the members of the above-mentioned embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

As shown in FIG. 9, in this embodiment, the slide arm 5
In order to detect the position, the arm switches 15 to 17 are not used, and instead a resistor 31 is provided longitudinally on the upper surface of the slide arm 5, for example. Also, illustration A in FIG.
As shown in FIG. 10, which is an enlarged sectional view of the section, a movable contact 11A that moves together with the guide body 11 and comes into sliding contact with the resistor 31 is provided.
A and A constitute a variable resistor VRI. Incidentally, connectors are connected to both ends of the resistor 31 and the movable contact 11A, respectively, as shown in FIG. 10.

The detection device for the sheet 1 includes a resistor 32 disposed on the lower surface of the sheet 1 and a movable contact IA that moves together with the sheet 1 and comes into sliding contact with the resistor 32, as shown in FIG. The resistor 32 and the movable contact IA constitute a variable resistor VR2. Note that this resistor 32
Connectors are also connected to both ends of the movable contact IA.

FIG. 12 shows a drive control circuit for the motor 13 using both of the above position detection devices. Said resistor 31.3
One end of the switch 2 is connected to a power source via a seat switch SW6, a buckle switch SW5, and a door switch SW4, and the other end is grounded. In addition, variable resistor VRI,
Both rotating contacts 11A and IA of VR2 are connected to a control box 35 inserted and connected between the seat switch casing 6 and the timer T1.

Here, the control box 35 includes a comparison circuit for comparing the voltages inputted through both variable resistors VRI and VR2, and a switch circuit that performs switching based on the output of this comparison circuit. The control box 35 controls the start and stop of forward movement of the slide arm 5. That is, when a person is seated on the seat with the door closed and the buckle is not engaged, both the variable resistors VRI and VR2
The two voltages dropped in the control box 3
5 is input. Here, the voltage input via the variable resistor VR2 is one of three types of voltages depending on the set position of the seat 1. For example, each voltage at the front most position, neutral position, and rear most position of seat 1 is L+Vz, V3 (for example, V, >V, >V
, and so on. Note that the magnitude relationship may be reversed), a voltage of - corresponding to the set position of the seat 1, for example, V2 at the neutral position, is input.

Then, the control box 35 operates the timer T1 by inputting the voltage (2), for example, and thereafter the forward drive of the slide arm 5 is started in the same manner as in the previous embodiment.

When the slide arm 5 begins to move, the voltage (2) input via the variable resistor VRI changes. Here, assuming that the voltage gradually increases, control box 3
5 compares the voltage V2 and the voltage (2), and controls to cut off the energization to the timer T1 when, for example, the voltage (2) exceeds the voltage v2. Then, the movement of the slide arm 5 is stopped in the same manner as in the above embodiment.

In this way, the control box is connected to the variable resistor VRI.
Since the stop position of the slide arm 5 is controlled by comparing the voltage input via the voltage input terminal with the voltages Vl, Vffi, and V3 corresponding to the set position of the seat 1, the stop position of the slide arm 5 is controlled at the same time as the set position of the seat 1. The supply amount of the seat belt 2 can be varied accordingly.

〔Effect of the invention〕

As described above, according to the present invention, by controlling the amount of thrust of the seatbelt according to the set position of the seat, it is possible to always set the tongs at a position where it is easy to take them.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are schematic explanatory diagrams showing the basic configuration of the seat belt device according to the present invention, FIG. 3, and FIG. 4(a), respectively.
-(C) are schematic explanatory views of the slide arm drive mechanism and its position detection device, respectively, and FIG. 5. Figure 6 (al, (bl) is a schematic explanatory diagram showing a detection device for variable setting positions of the seat, Figure 7 is a circuit diagram of a motor drive control circuit, Figure 8 is a timing chart showing motor drive operation, FIG. 9 is a schematic explanatory diagram showing a modification of the slide arm position detection device, FIG. 10 is an enlarged sectional view of section A shown in FIG. 9, and FIG. 11 is a modification of the seat variable setting position detection device. The schematic explanatory diagram and FIG. 12 are circuit diagrams showing a modification of the motor drive control circuit. 1... Seat, 2... Seat belt, 2A... Tong, 5... Moving member, 13...・・Drive part, 15.1
6.17...Second detection unit, SWl, SW2. sw3
...first detection section, VRI...second detection section, VR2...first detection section. Figure 6 Figure 9■ Want Figure 10

Claims (2)

[Claims] (1) a seat belt that is removably supported at the rear of one side of the seat; a moving member that is moved forward from the rear of one side of the seat to push out the seat belt; and a drive unit that drives the moving member; a first detecting section that detects the variable setting position of the seat; a second detecting section that detects the amount of push-out of the seat belt; and driving in the driving section based on the outputs of the first and second detecting sections. A seat belt device comprising: a drive control section that controls the seat belt to be pushed out to an appropriate position according to a variable setting position of the seat by varying the amount of the seat belt. (2) The seat belt device according to claim 1, wherein the second detection means detects the moving position of the moving member to detect the amount of push-out of the seat belt.