JPS62178458A - Seat belt device - Google Patents

Abstract

PURPOSE:To facilitate the fitness of a seat belt by providing a seat fit switch which is actuated when the seat belt is fitted whereby controlling an arm having a belt-through by actuating the switch. CONSTITUTION:A judgment is made of the case when a man passes through with a door opened, by a door switch which is actuated accompanied by a man getting on and out. And when no man gets on and out, the belt-through 5 of an arm 4 driven by a motor is pulled toward you, and when a man gets on and out, the belt-through 5 is moved to a housed condition. Accordingly, a seat belt device is actuated whenever a man gets on and out for facilitating the pick-up of a belt tong 6 attached between the end of a belt 1 and the belt- through 5 so as to improve the fitness of a seat belt.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat belt device, and particularly to a structure of a seat belt device suitable for a seat belt device for a two-door type automobile. .

[Prior Art] Conventional seatbelts are positioned at 1% and 1%, particularly in two-door type automobiles, due to the position of the pillars, the anchor through of the seatbelt device is located at the rear, and the seatbelt is located at the rear.
Since the ease of wearing the seatbelt device is very poor, some seatbelt devices have a configuration as shown in FIG. 5, which is a schematic diagram of the inside of a vehicle showing the state of the seatbelt device.

In the figure, the belt 1 is wound around a belt winding machine (not shown) installed in a pillar 2, that is, a retractor.
An anchor through 3 having a fulcrum on the pillar 2 and a belt through 5 of the arm 4 were inserted through the anchor through 3 and the end thereof was attached to the pillar 2. A belt tongue 6 is inserted between the end of the belt 1 and the bell (through 5) of the arm 4.

The seat 7 is provided with a belt anchor 8 that can be locked to or released from the belt tongue 6.
The seatbelt attachment switch SSW is provided, which is turned on when the belt tongue 6 and the belt anchor 8 are locked, and turned off when the belt tongue 6 and the belt anchor 8 are unlocked. are doing.

Therefore, when riding, a person holds the belt tongue 6 and pulls the belt 1, and the arm 4 is pulled out together with the belt 1 which is not wound around the tractor.

By locking the belt tongue 6 to the belt anchor 8 of the seat 7, the seat belt is brought into the '[ff] state.

At this time, when the belt tongue 6 and the belt anchor 8 are in a locked state, the seatbelt attachment switch SSW is turned off, and the seatbelt 1 to attachment indicator lamp can be displayed as being off.

Furthermore, when getting out of the vehicle, the person can hold the belt tongue 6 and release the seat belt anchor 8 to release the seat belt.

[Problem to be solved by the invention] However, when a person gets off the train, the person holds the belt tongue 6 and the seat 7
When the belt anchor 8 and belt tongue 6 of the vehicle are unlocked to release the belt, the arm 4 will stop at the position it was in when the belt was worn, and the person will have to return it to the stowed state by hand when getting off the vehicle. That was an annoyance.

Furthermore, when riding a vehicle, the arm 4 is in the retracted state when the vehicle is seated on the seat belt, making it difficult to locate the belt tongue 6.

SUMMARY OF THE INVENTION Therefore, in order to solve the above-mentioned problems, the present invention aims to provide a seat belt device that operates in response to a person getting on or off the vehicle, thereby making it easier to put on the seat belt.

[Means for Solving the Problems] The seat belt device according to the present invention includes a switch that is activated when a person gets on or off the vehicle, an arm that is driven by a motor and has a belt through which the belt is inserted, and a seat belt that is fitted with the seat belt. The motor is controlled by a seat belt fastening switch that is activated when the person gets on or off the vehicle, and a switch that is activated when the person gets on or off the vehicle.
The vehicle is equipped with a control circuit that stops the control when the seat belt attachment switch is activated, and a bell l-tang inserted between the end of the belt and the belt through of the arm.

[Function] The seat belt device of the present invention determines when a person moves through the door by a switch that is activated when a person gets on or off the vehicle, and if a person does not get on or off the vehicle, the belt of the arm driven by the motor is activated. Pull out the belt to the front, and when a person gets on or off the vehicle, move the belt through of the arm driven by the motor to the stored state side. This makes it easier to remove the belt tongue inserted between the end of the belt and the belt through of the arm, and is expected to improve the ease of wearing the seatbelt 1-.

[Embodiment] FIG. 1 is a front view of a main part of the outline of a seat belt device according to a first embodiment of the present invention, and FIG. 2 is a central sectional view of the main part.

In the figure, a reversible direct current motor M is attached to the hinter 20. The output shaft of the motor M is transmitted to a worm and a worm gear in a gear housing 12 by a torque cable 11 which is a flexible cable. The rotation of the worm gear is transmitted to the pinion 13 and via the sector gear 14 to the arm 4 supported coaxially with the sector gear 14. A belt through 5 is rotatably supported at the end of the arm 4 by a hinge pin 18. Further, the anchor through 3 is supported by an anchor bolt 21 and tightened to the center pillar 20 with a nut 22.

The belt 1 wound around a retractor (not shown) installed inside the center pillar 20 is inserted into the insertion hole 3a of the anchor through 3 and the insertion hole 5a of the belt through 5, and the end of the belt 1 is It is attached to the center pillar 20.

Note that the cover 16 covers the pinion 13 and sector gear 14,
It covers the end of the arm 4 supported coaxially with the sector gear 14.

The mechanism section of the seat belt device of this embodiment configured as described above can operate as follows.

When the motor M rotates, the pinion 13 is rotated in a predetermined direction via the torque cable 11, the worm, and the worm gear. The pinion 13 meshes with a sector gear 14, and the sector gear 14 moves the arm 4 to the lower limit stop 17a.
and rotate within the range of the upper limit stopper 17b. That is, in FIG. 1, when the sector gear 14 rotates to the right, the arm 4 can be rotated within a range from the upper limit stop 1 to the point where it comes into contact with the collar 17b. When the sector gear 14 rotates to the left, the arm 4 can rotate within a range until it comes into contact with the lower limit stopper 178.

When the sector gear 14 rotates to the right, the arm 4 rotates within a range until it comes into contact with the upper limit stopper 17b, and the belt through 5 pulls out the belt 1 wound around the retractor. Therefore, the belt tongue 6 located between the end of the belt 1 and the insertion hole 5a of the belt through 5 can be easily removed.

Furthermore, when the sector gear 14 rotates to the left, the arm 4 rotates within the range until it comes into contact with the lower limit stopper 178, releasing the tension on the belt through 5.
is wound up on the retractor, and the belt 1 and arm 4 are in their most stowed state.

FIG. 3 is a circuit diagram of a control circuit section that controls the mechanical section of the seat belt device according to the first embodiment of the present invention shown in FIGS. 1 and 2.

When the main switch SWO is on, the surge absorber SA, the parallel circuit of the electrolytic capacitor CO, the resistor RO, the Zener diode zD1, the protective diode 03.1 connected in series with the Zener diode ZD, and the transistor Q1
A power supply voltage +VB is outputted by a known constant voltage circuit consisting of the following.

Furthermore, power is supplied to the solenoids and contacts of relays Rup and Rdw, which control the rotational direction and on/off of the motor M.

Through a series circuit of a known room lamp RL, a diode D1, and a door switch DSW that closes when the door is opened, the room lamp RL lights up when the door is opened and turns off when the door is closed.T-Itoru In this embodiment, the open/close state of the door switch DSW is detected as the open/close potential from the series circuit of the room lamp RL, the diode D1 connected thereto, and the door switch DSW. The door switch DSW is connected to a pull-up resistor R1 via a diode D2.

Capacitors C1 and C2 are connected between the connection points of the pull-up resistor R1 and the series resistors R2 and R3. The potential ■ at the connection point between the series resistors R2 and R3 and the capacitor C2 is input to the comparators COMPI and COMP2. Further, the comparator COMPI has resistors R4, R5, R6, and R7.

High IA(if) voltage VT1 from the series circuit consisting of R8
However, similarly, a low threshold voltage VT2 is input to the comparator COMP2. Therefore, comparator C
The output of OMP1 is a threshold voltage V where the potential V at the connection point is high.
When it exceeds TI, it becomes H (high level)'' and comparator C
The output of OMP2 becomes 'H' below the low threshold voltage VT2.Then, when the potential ■ at the connection point is in the range from the threshold voltage VT1 to the threshold voltage VT2, both comparators COMP1
And the output of the comparator COMP2 becomes 'L (low level)'.

Further, the output of the comparator COMP1 is input to the transistor Q2 via a resistor R10 and a resistor R12.

Note that the pull-up resistor R11 is the resistor R10 and R12.
The output of comparator C○MP1 is H''
When , the voltage is raised, and the transistor Q
2, the base-emitter resistance R13 is the transistor Q
2 to ensure that it is in the OFF state.

Similarly, the output of the comparator COMP2 is the resistor R14,
It is input to transistor Q3 via resistor R16. Pull-up resistor R15 connects the potential at the connection point of resistors R14 and R16 to the point where the output of comparator COMP2 is 11H.
When it is +1, the voltage is raised, and the pace-emitter resistance R17 of the transistor Q3 ensures that the transistor Q3 is turned off.

A solenoid of a relay Rup is connected to the collector side of the transistor Q2, and a solenoid of a relay Rdw is connected to the collector side of the transistor Q3. When the transistor Q2 is turned on, the a-C of the contacts of the relay Rup are connected.
By turning on h-transistor Q3, the contacts of relay Rdw are switched between a-C and b-c.

Seatbelt attachment switches SS to V, which are turned on when a person is seated in the seat, holding the belt tongue 6, and wearing the belt 1 which is secured to the belt anchor 8 of the seat 7, are connected to the pull-up resistor R20, and are connected to the pull-up resistor R20. Opening and closing of the seat belt attachment switch SSW is detected by diode D7,
A switching circuit made up of resistors R21 and R22 and a transistor Q4, and an output opened and closed by the switching circuit are led to a switching circuit made up of resistors R23 and R24 and a transistor Q5.

The outputs of the comparators COMPI and COMP2 are led to the collector side of the transistor Q5 of the switching circuit through a diode D5 and a diode D6. Therefore, when the seat belt attachment switch ssw is turned on, transistors Q4 and Q5 are turned on, transistors Q2 and Q3 are turned off by diode D5 and diode D6, and relays Rup and Rd are turned on.
Let w be the stopped state of the illustrated contact state.

When the main switch swo is turned on, a resistor R20 and a resistor R25, a resistor R22 and a resistor R are connected to the capacitor C3.
21 and the diode D7. This charging voltage increases the load current of motor M, and resistor R26
The voltage drop of transistor Q6 becomes larger than a predetermined threshold value.
When turned on, it is rapidly discharged through diode D13. Once discharged, resistor R22 and resistor R2
1 and turns on transistor Q4 for a predetermined period of time charged through diode D7.

η, motor M is connected to a common contact point of relay Rup and relay Rdw. Further, the diode D4 clamps the potential of the ground side wiring. Diode D8 and diode D9 are flywheel diodes.

Next, the operation of the control circuit unit that controls the seat belt device of this embodiment configured as described above will be explained.

First, when the main switch SwO is in the on state and a person opens the door to board or exit the vehicle, the seat belt attachment switches 1 to ssw are not worn and are in the off state.

By opening the door, the door switch DSW is turned on and the room lamp RL is turned on. At the same time, capacitor C
The almost steady state voltage +VB (R2/ (R2+R3)) charged in 1 and 1 + C2 is negative at the connection point between resistor R2 and resistor R3, positive at the diode D2 side, and at the connection point between resistor R2 and resistor R3. The point potential V becomes approximately -VB (R2/'(R2+R3>), and the output of the comparator COMP2 becomes "-B". When the output of the comparator COMP2 becomes "1", the resistance R
Transistor Q3 is turned on via R14 and R16, putting relay Rdw into operation. When the relay Rdw is activated, the common contact C switches the connection from the B contact to the A contact, and the motor M rotates the arm 4 to the side where the arm 4 is in a bad storage state.

During this time, the steady state voltage charged in the capacitor C1 and capacitor C2 is discharged, and when the voltage becomes higher than the threshold voltage VT2, the output of the comparator COMP2 becomes II L II, and the transistor Q3 is turned off. When transistor Q3 is turned off, relay Rdw is de-energized and rotation of motor M is stopped. Further, the capacitor C1 and the capacitor C2 are reversely charged by the resistor R2, the capacitor C1 and the capacitor→JC,2, and the diode D2. During normal door opening time, the charging voltage of capacitor C1 and capacitor C2 is approximately +VB.
(R3/(R2+R3)).

Here, when a person gets on or off the vehicle and closes the door, the door switch DSW is turned off and the room lamp R is turned on. At the same time, capacitor C1 and condenser C
The almost steady state voltage +VB (R3/ (R2→-R3)) charged at
The connection point between and resistor R3 is lifted by resistor R1, and becomes +VB +VB (R3/ (R2+R3)), and the output of comparator COMP1 becomes 111~4''. When the output of comparator COMPI becomes 'l-1'', , transistor Q2 via resistors R10 and R12.
is turned on, and the relay Rup is activated. When the relay Rtll) is activated, the common contact C switches the connection from the B contact to the A contact, and the septa M rotates the arm 4 to the activated state. During this time, the steady state voltage charged in capacitor C1 and capacitor C2 is discharged, and when the voltage becomes lower than the threshold voltage v11, the output of comparator COMPI becomes L'', and transistor Q2 is turned off. Transistor Q2 is turned off. Then, the relay Rut) becomes de-energized and stops the rotation of the motor M.Furthermore, the capacitor C1 and the capacitor C2 are connected to the resistor R
1. It is charged via the capacitor C1 and the capacitor C2 with a voltage of 10 VB and the divided voltage of the resistor R2 and the resistor R3.

Note that the rotation time of the motor M is set by the charging voltage of the capacitor C1 and the capacitor C2, but when the sector gear 14 comes into contact with the lower limit stopper 178 or the upper limit stopper 17b and the load current of the motor M increases, the voltage of the resistor R2G increases. Since the voltage drop becomes large and transistor Q6 is turned on, the charge in capacitor C3 is rapidly discharged via diode D13. Once discharged,
The transistor Q4 is turned on for a predetermined time charged through the resistor R22, the resistor R21, and the diode D7, and as a result, the transistor Q4 and the transistor 05 are turned on, and the comparator COMP1 and the comparator COMP2 are charged through the diode D5 and the diode D6.
The output of is pulled to lI-II, and transistor Q2 and transistor Q3 are turned off. Motor M
can be stopped not only by the time limit set by the time constant circuit, but also by the magnitude of the current.

When a person gets in the vehicle and fastens the seat belt 1, the seat belt fastening switch SSW is turned on.

At this time, diode D7 is turned on, and a switching circuit made up of resistors R21 and R22 and transistor Q4, a switching circuit made up of resistors R23 and R24, and transistor Q5 are turned on, and transistor Q5 turns on diode D5 and Diode D
6, the outputs of the comparator COMP1 and the comparator COMP2 are pulled to "L Tt,"
Transistor Q2 and transistor Q3 are turned off. Therefore, when the seat belt is fastened, that is, when the seat belt fastening switch SSW is on, the arm 4 maintains its operating position regardless of whether the door switch DSW is on or off.

In this embodiment, a door switch DSW is used as a switch activated when a person gets on or off the vehicle, and an arm 4 having a belt through 5 driven by a motor M is connected to the end of the belt 1 and the belt through 5 of the arm 4. The system is equipped with a bell 1 and a tongue 6 inserted into the door, and the door switch DSW, which is activated when a person gets on or off, determines whether a person is passing through the door with the same number, and whether or not the person is getting on or off the vehicle. When the completed door is closed, the belt through 5 of the arm 4 driven by the motor M is lifted forward, and when the door for people to get on and off the vehicle is opened, the belt through 5 of the arm 4 driven by the motor M is lifted up. 5 to the stored state side. Thereby,
This makes it easier for a person to remove the belt tongue 6 inserted between the end of the belt 1 and the bell l-through 5 of the arm 4, and is expected to improve the ease of wearing the seat belt. Furthermore, since the heel through 5 of the arm 4 can be moved to the stored state when getting off the vehicle, there is no need to manually return it to the stored state.

In this embodiment, a door switch DSW is used as a switch activated when a person gets on or off the vehicle, but when implementing the present invention, a door switch DSW and a seating switch NSW can be used.

FIG. 4 shows another example of the control circuit section for controlling the mechanical section of the seat belt device according to the first embodiment of the present invention.

In the figure, the same reference numerals and symbols as in the first embodiment of FIG. 3 indicate the same or corresponding parts, and since the basic structure is the same, only the differences will be explained.

The seating switch NSW is a switch that is disposed on the seat 7 and operates by the weight of a person sitting on the seat 7, and switches that operate by applying pressure can be used. In addition, monostable @ path 30 and monostable circuit 31
A circuit that outputs a predetermined pulse width using a trigger signal such as a monomulti-by-break can be used.

When the door changes from the closed state to the open state, the door switch DSW changes from OFF to ON, and the potential at the connection point between the pull-up resistor R1 and the diode D2 becomes the same as that of the door switch DS.
When W goes from off to on, it produces a falling signal.

The falling signal is connected to diode D11 and capacitor C.
11, a trigger signal is obtained which triggers the monostable circuit 31 on a falling edge. That is, when the door switch DSW is turned on from off, the monostable circuit 31 is activated at the falling edge.
is triggered and outputs a predetermined pulse width that brings the arm 4 into the accommodated state, and the relay Rdw is energized for a period of time corresponding to the pulse width.

Therefore, when the door changes from closing, that is, when boarding or exiting the vehicle, the door switch DSW is turned from OFF to ON, and the monostable circuit 31 is triggered at the falling edge of the switch DSW for a period of a predetermined pulse width. Relay Rdw is energized and motor M is rotated to the storage side of arm 4.

When the door changes from the open state to the closed state, the door switch DSW changes from on to off, and the potential at the connection point between the pull-up resistor R1 and the diode D2 changes from the door switch DS
When W goes from on to off, it produces a rising signal. The rise signal passes through a diode D10 and a capacitor C10 to obtain a trigger signal that triggers the monostable circuit 30 at the rise. That is, when the door switch DSW turns from on to off, the monostable circuit 3 is activated at the rising edge.
0 is triggered and arm 4 is pulled out to the front. i”, /7'1 mountain mos fy (rs 2fr'+ rl II.

It becomes an input to the AND gate AND for a time corresponding to the width of the signal.

At this time, if a person is sitting on the seat 7, the seat switch NSW, which operates due to the weight of the person, is turned off.
Diode 012 turns off and pull-up resistor R31
As a result, the input of the AND gate AND becomes 'H',
Relay Rup is kept in an excited state for only the output time of a predetermined pulse width of monostable circuit 30.

Therefore, when the door changes from opening to closing, that is, when a person gets on board and sits on the seat 7, the door switch DSW
turns from on to off, and at the rising edge, monostable circuit 3
0 and relay Rup for a predetermined pulse width time.
is brought into an excited state, and the motor M is rotated in a direction to pull out the arm 4. However, when no one is seated on seat 7, the game 1-A N D closes and the motor M
does not rotate.

In this way, as in this embodiment, the door switch DSW and the seating switch N are used as switches that operate when a person gets on and off the vehicle.
SW can be used.

In the above embodiment, the arm 4 and the belt through 5 of the arm 4 are constructed from separate members, and are connected to the hinge bin 1.
However, when carrying out the present invention, the structure is not limited to the above structure, and the arm 4 and the belt through 5 may be formed as a body.

In addition, in each of the above embodiments, the control circuit that controls the motor M by the operation of a switch that is activated when a person gets on or off the vehicle, and stops the control by the operation of the seal belt installation switch SSW, is configured to control the motor M by setting a time limit and controlling the motor Although the rotation time of M is set, when implementing the present invention, the step motor may be configured to rotate by the output of the door opening/closing detection circuit. Furthermore, the arm can be reciprocated by energizing a solenoid with the output of the door opening/closing detection circuit and utilizing the attraction and repulsion of the magnetic material.

[Effects of the Invention] As described above, the seat belt device of the present invention includes a switch that is activated when a person gets on and off the vehicle, an arm that is driven by a motor, and that controls the belt through which the belt is inserted.
Seat 1 - A seat belt installation switch that operates when the belt is fastened, a control circuit that controls a motor by the switch that operates when the person gets on or off the vehicle, and stops the control when the seat belt installation switch is activated, and the end of the belt. Since it is equipped with a belt tongue inserted between the belt through section and the arm, a switch that is activated when a person gets on or off the door determines when a person will move through the door, and when a person gets on or off the door. If not, the belt through of the arm driven by the motor can be pulled out toward the front, and when a person gets on or off the vehicle, the belt through of the arm driven by the motor can be moved to the storage state side. Therefore, the seat belt device operates when a person gets on or off the seat, making it easier to remove the belt tongue inserted between the end of the belt and the belt through of the arm, making it easier to put on the seat belt, and making it easier to put on the seat belt. It can be expected that the wearability will be improved. Furthermore, since the belt through of the arm can be moved to the stowed state side when getting off the vehicle, it is possible to eliminate the trouble of manually returning it to the stowed state.

[Brief explanation of drawings]

FIG. 1 is a front view of the main parts of the mechanical part of the seat belt device according to the first embodiment of the present invention, FIG. 2 is a central vertical sectional view of the main parts, and FIG. FIG. 4 is a circuit diagram of the control circuit section for controlling the modified section of the seat belt device according to the first embodiment of the present invention shown in FIG. 1 and FIG. 2. 6 is a circuit diagram of another example of a control circuit section that controls the In@ section of the seat belt device, and a schematic diagram of the interior of the vehicle showing the state of the seat belt device of FIG. 5. FIG. In the figure, 1...Belt, 3...Anchor through, 4
... Arm, 5... Belt through, 6.
・・Belt tongue, 8・Belt anchor, 7・
・・Seat, M・・Motor, SWO・・
・Power switch, SSW...Seatbell 1~installation switch, NSW...
- Seating switch. In addition, in the figures, the same reference numerals and the same symbols indicate the same or equivalent parts.

Claims (4)

[Claims] (1) A switch that is activated when a person gets on or off the vehicle, an arm that is driven by a motor and has a belt through which the belt is inserted, a seat belt installation switch that is activated when the seat belt is fastened, and an arm that is activated when the person gets on or off the vehicle. A control circuit that controls the motor with a switch that controls the motor and stops the control when the seat belt installation switch is activated, and a belt tongue that is inserted between the end of the belt and the belt through of the arm. seat belt device. (2) The seat belt device according to claim 1, wherein the switch that is activated when the person gets on and off the vehicle is a door switch that opens and closes when the door opens and closes. (3) The seat belt according to claim 1, wherein the switch that is activated when the person gets on and off the vehicle is a door switch that opens and closes when the door opens and closes, and a seating switch that detects whether the person is seated on the seat. Device. (4) The control circuit that controls the motor by a switch activated when a person gets on or off the vehicle, and stops the control when the seat belt installation switch is activated, is a time limit circuit that detects the opening and closing of the door and determines the rotation time of the motor. The seat belt device according to claim 1, comprising: and a motor drive circuit.