JPH01247249A - Seat belt device - Google Patents

Abstract

PURPOSE:To improve wearability by holding a guide member of a reach member usually on a housing position, and moving the guide member to a extended position at least when door is closed while returning the guide member to the housing position always when the door is opened. CONSTITUTION:According to a control unit 45, when in an empty condition and a reach member 36 is on a housing position, a limit switch LS1 of an operation mechanism 40 is made ON, and when the door is shut on getting on a car, a door switching SW1 becomes in OFF. And when an ignition switch is made to ON, a motor M is started, a drive disc 42 is rotated and when a limit switch LS3 becomes to OFF, the motor M stops and the reach member 36 gets to an extended position. Therefore, a guide member 36b moves to the extended position with a shoulder portion 31a of a webbing 31, so it is easy to put on the same. A belt switch SW2, if equipped with, becomes to ON, the motor M is restarted, the reach member 36 is started in housing action and when the door is opened, the same gets to the housing position.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is characterized in that a webbing relay anchor is provided at a position spaced apart from the backrest at the upper side of the passenger compartment, and the webbing is transferred from a retractor that retracts the webbing through the relay anchor. The present invention relates to a seat belt device which has a webbing extending therein and which pulls forward the shoulder portion of the webbing so that a seated person can easily put it on.

"Prior Art" In recent years, it has become common for automobiles to have three-point seatbelt devices in the driver's and passenger's seats. Generally, a relay anchor is provided at the upper part of the passenger compartment at a position away from the backrest, and the shoulder portion of the webbing is pulled forward from the relay anchor and attached to the leader.

However, with this arrangement, when fastening the seat belt, the seated person is forced to twist their body to pull the shoulder area at the rear, forcing them into an unreasonable posture, making it extremely difficult to put on the seat belt, especially on two-door vehicles. In hardtop cars, etc., the entrance is large and the shoulder area tends to be at the rear, making it even more difficult to install.

Therefore, as a technology to solve this problem,
There is one disclosed in Japanese Patent No. 192639.

In other words, the publication states that the end of the webbing is held by a rotating member that rises and falls as the door opens and closes, and that when the door is closed, the rotating member stands up, and when the door is opened, the rotating member moves along the floor. The technology that prevents the vehicle from falling over and obstructing the passenger entrance is demonstrated.

``Problems to be Solved by the Invention'' However, in such conventional seat belt devices, the one-turning member falls along the floor, so although the width of the entrance/exit is secured, the seat belt protrudes onto the floor of the entrance/exit, Not only is there a risk of tripping because of the obstruction, but there is also the problem that dirt on the footwear may adhere to the webbing, making it unclean.

The present invention was made by focusing on these conventional problems, and provides a seat belt device that does not obstruct the entrance and exit at all, eliminates contamination of the webbing, and improves the ease of wearing. is intended to provide.

[Means for Solving the Problems] The gist of the present invention for achieving the above object is to provide a retractor for retracting the webbing, in which a relay anchor for the webbing is provided at a position spaced apart from the backrest at the upper side of the passenger compartment. In a seatbelt device in which a webbing extends into the vehicle interior through the relay anchor and the shoulder portion of the webbing is pulled forward, there is a storage position near the relay anchor and an extended position in front of the storage position. A reach member is installed on the vehicle body to move the shoulder part of the webbing between the parts.

An actuation mechanism is provided to operate the reach member so that the shoulder portion of the webbing is displaced between a storage position and an extended position, and the guide portion of the reach member is normally held in the storage position and at least when the door is closed. The seat belt device is characterized in that it is provided with a control section that moves the guide section to the extended position and always returns the guide section to the storage position when the door is opened.

"Function" The seat belt extends from a relay anchor located at a distance from the backrest at the upper side of the vehicle compartment, and wraps around the seated person.

When the passenger is not seated, the reach member is in the stowed position and the webbing runs along the side of the passenger compartment without covering the entrance to the rear seat.

When fastening the seat belt, when the predetermined fastening conditions are met, the operating mechanism moves the reach member to the extended position according to instructions from the control unit, and the seated person can easily put their hand on the shoulder part and pull the webbing. It can be worn by wrapping it around the body.

When the door is opened, the control section determines that the seat belt is not to be fastened, checks the position of the reach member, and if it is not in the stowed position, instructs the actuation mechanism to return the reach member to the stowed position.

"Example" Hereinafter, various embodiments of the present invention will be described based on the drawings.

1 to 7 show a first embodiment of the present invention.

As shown in FIGS. 1 to 3, a front seat 10 and a rear seat 10a are arranged in the interior of an automobile, and an entrance 21 is provided on the side of the vehicle body 20 facing the front seat 10.

A seat belt device 30 for a person seated in the front seat 1O.
is provided.

The webbing 31 of the seat belt device 30 is attached to the front seat 10.
The position is located away from the backrest 11 of the vehicle, and is located on the side wall 2 of the passenger compartment.
A relay anchor 32 is provided on the upper side of the relay anchor 3.
The webbing 31 is drawn into the inside of the rear villa 24 of the vehicle body 20 through the intake port 23 opened at position 2, and the base end of the webbing 31 is provided at the lower end of the rear villa 24 or wound around the tractor 33.

The relay anchor 32 has a guide hole 3 through which the webbing 31 is inserted.
2a, the webbing 31 extends into the vehicle interior through the guide port 32a, and its end is fixed to the floor, and the webbing 31 is provided with a tongue plate 34.
The seated person is able to wear the seat by pulling the shoulder portion 31a of the passenger seat 1 forward and fitting the tongue plate 34 into a buckle 35 provided on the opposite side.

A shiny reach member 36 that hangs downward and cannot swing back and forth is pivotally supported by a pivot 36a at an intermediate position between the relay anchor 32 and the backrest 11 toward the backrest ll side. There is.

The shoulder part 31a of the webbing 31 is inserted into the tip of the reach member 36, and as the reach member 36 swings, the hand is placed in the storage position near the middle door anchor 32 and the webbing 31 on the side of the seated person. A guide portion 36b is pivotally supported and is movable between the guide portion 36b and the easy-to-extend position.

An operated end 36c is provided protruding from the base of the reach member 36,
The operated end 36c is connected to the actuation mechanism 40 by a push-pull cable 37.

The actuating mechanism 40 swings the reach member 36 back and forth to move the guide portion 36b between the extension position and the storage position, and as shown in FIGS.
1, a drive disk 4 that is rotated only in one direction by a motor M;
2 is attached, and an operating lever 43 that swings by a drive disk 42 is pivotally supported by a pivot shaft 43a.

An engagement pin 42a is protruded from the surface of the drive disk 42, and an elongated hole 43b is bored in the operating lever 43, into which the engagement pin 42a is slidably engaged. When the engaging pin 42a rotates, the operating lever 43 swings due to its engagement with the elongated hole 43b.

The operated end 36 of the reach member 36 is attached to the end of the operating lever 43.
The end of the push-pull cable 37 extending from c is connected, and the outer periphery of the drive disk 42 forms a cam surface 42b for detection, and the limit switch LSI-
LS3 is provided.

The control unit 45 of the seat belt device 30 is connected to the motor M of the actuating mechanism 40, and limit switches LSI to LS
3. A door switch SWI, a belt switch SW2 that detects the connection between the tongue plate 34 and the buckle 35, and a power line 38 are connected to the control unit 45.

FIG. 6 shows the electric circuit of the control section 45.

In addition to the above switches, there is a starting relay RA connected to the door switch SWl, an ignition switch SW3. It is equipped with a relay RB for operation control and a relay RC for manual power to the motor M.

The limit switches LSI to LS3 are turned on and off depending on the positional relationship with the rotational position of the cam surface 42b of the drive disk 42 corresponding to the extending operation of the reach member 36.

As shown in Figure 7, limit switch LS2 is turned off in the retracted position (a), limit switch LS3 is turned off in the extended position (b), and limit switch LSI is turned off in the retracted position (c). and all other states are set to be on.

The starting relay RA has a switching contact part ral, the operation control relay RB has a normally open contact rbl, and the power relay RC has a switching contact part rcl.

Next, the effect will be explained.

The seat belt is worn by a webbing 31 extending from a relay anchor 32 at a position spaced apart from the backrest 11 at the upper side of the vehicle interior and wrapped around the seated person.

As shown in FIGS. 1 to 3, when a person is not seated, the reach member 36 swings rearward, the guide portion 36b is in the storage position, and the webbing 31 enters the rear villa 24 from the lead-in opening 23. Retractor 33 at the lower end of rear villa 24
The vehicle is caught up in the vehicle, and is along the rear villa 24 on the side of the vehicle interior without being caught in the entrance/exit door 21.

When a person takes a seat in the front seat and closes the door, the motor M is started and the drive disk 42 rotates, and due to the rotational movement of the engagement pin 42a, it engages with the engagement pin 42a via the elongated hole 43b. The operating lever 43 swings, the push-pull cable 37 pulls the operated end 36c of the reach member 36, the reach member 36 swings forward, and the guide portion 36b moves to the extended position.

As shown in FIG. 4, the guide portion 36b moves while holding the shoulder portion 31a of the webbing 31, so that the seated person can easily place his or her hand on the shoulder portion 31a and move the webbing 31.
can attract.

When the webbing 31 is wrapped around the body and the tongue plate 34 is inserted and fitted into the buckle 35, the motor M is restarted, the drive disc 42 rotates, the operating lever 43 swings, and the push-pull cable 37 is activated. Push the operated end 36c of the reach member 36, and as shown in FIG.
6 swings backwards and waits in the storage position.

After the reach member 36 has been set to the extended position, if the user stops wearing the seat belt for some reason and opens the door to get on or off the rear seat, the reach member 36 returns to the storage position and stops.

What controls the above operation is a control section 45 having an electric circuit shown in FIG. 6, which will be explained below with reference to FIG. 7 as well.

The operation of getting into an empty car and letting the reach member 36 hold out the webbing 31 is as follows.

When the vehicle is empty and the reach member 36 is in the storage position,
The positional relationship between the limit switches LSI to LS3 and the cam surface 42b of the drive disk 42 is in the state shown in FIG. When the door switch SW1 is closed, the door switch SW1 is turned off, and when the key plate is inserted into the ignition key hole and operated, the ignition switch SW3 is turned on.

The switching contact part ral of the starting relay RA is on the limit switch LSI side, and the limit switch LSI, LS3
．． Through the ignition switch SW3, the relay RB for operation control and the relay RC for power manual power are energized and excited, the normally open contact rbl and the switching contact rcl are turned on, and the motor M is energized through these, and the reach member 3
6 is started.

When the drive disk 42 rotates and becomes the state shown in FIG. 7(b), the limit switch LS3 turns off.

Relay RB for operation control and relay RC for power manual power are no longer energized, motor M is stopped, and reach member 36 is at the extended position.

As described above, the guide part 36b of the reach member 36 moves to the extending position while holding the shoulder part 31a of the webbing 31, and the seated person can easily put their hand on this shoulder part 31a and pull the webbing 31. Installing.

When the webbing 31 is wrapped around the body and the tongue plate 34 is inserted and fitted into the buckle 35, the belt switch SW2 is turned on. From this state, the storage operation of the reach member 36 starts.

When the belt switch SW2 is turned on, since the limit switch LSI is turned on, the relay RB for operation control and the relay RC for power manual power are energized again, and the motor M is restarted.

When the drive disc 42 rotates and the positional relationship between the cam surface 42b and each limit switch becomes the state shown in FIG. 7(c), and the limit switch LSI turns off, the operation control relay RB and the power manual relay RC is no longer energized, and motor M stops.

This position is not a complete storage position, and next time the door is opened, the switching contact ral of the starting relay RA will be switched.
Electricity is applied through the limit switch LS2, which is turned on, to rotate the motor M, and as shown in FIG. 7(a), when the limit switch LS2 is turned off, the reach member 36 is in the retracted position.

By the way, the limit switch LS2 is on except when the reach member 36 is in the storage position, and when the door is opened, the switching contact part ral of the starting relay RA switches to the limit switch LSI side and turns on. The motor M rotates by energizing it through the limit switch LS2.

As long as the door is open, the switching contact ral of the starting relay RA is on the limit switch LSZ side, so regardless of the state of limit switches LSI and LS3, the motor M is always in the state where limit switch LS2 is off. rotates.

That is, when the door is open, there is a possibility of getting on or off the rear seat, so the reach member 36 returns to the storage position and waits no matter what position it was in before.

8 to 10 show a second embodiment.

In this embodiment, the arrangement of the vehicle body and the vicinity of the seats is the same as in the first embodiment, so similar parts are denoted by the same reference numerals.
Omit duplicate explanations.

In this embodiment as well, a seat belt attachment fl 30a is provided for the person seated in the front seat 10.

A guide rail 25 is fixedly provided on the roof rail portion of the vehicle body at a side position of the seated person, and a guide groove 26 is formed in the guide rail 25.

The reach member 39 that moves the shoulder portion 31a of the webbing 31 has a connecting pin 39a having a fitting roller at its base, and the connecting pin 39a is connected to the storage position of the rear end of the guide groove 26 of the guide rail 25 and the guide. The guide groove 26 is arranged so that the reach member 39 can slide between the front end of the groove 26 and the extending position where it is easy to reach the side webbing of the seated person.
is fitted.

The reach member 39 also serves as a relay anchor, and has a guide port 39b through which the webbing 31 is inserted.
The webbing 31 extends into the vehicle interior through the webbing 9b, and the webbing 31 is provided with a tongue plate 34.
The shoulder part 31a of the passenger seat 1 is pulled forward, and the tongue plate 34 is fitted into a buckle 35 provided on the opposite side, so that the seated person can wear it.

A push-pull cable 37 that reaches the tip of the guide groove 26 of the guide rail 25 is extended to the actuation mechanism 40a, and a push-pull cable 37 that reaches the tip of the guide groove 26 of the guide rail 25 is extended to the connecting pin 39a of the reach member 39.
The tip is solidified.

The actuating mechanism 40a moves the reach member 39 back and forth between the delivery position and the storage position as necessary, and moves the push-pull cable 37 forward and backward from the base plate 46 using the motor M and the driving force of the motor M. A drive section 47 is provided, and a control section 45a that operates the seat belt device 30a and the actuating mechanism 40a is provided.

The control unit 45a is connected to the motor M of the actuating mechanism 40a, and has a limit switch LS4. Limit switch LS5 also detects that it is at the rear end.
．． The door switch swi, the belt switch SW2 that detects the connection between the tongue plate 34 and the buckle 37, and the power supply line 47 are connected to the control section 45a.

FIG. 9 shows the electric circuit of the control unit 45a, in which, in addition to the above-mentioned switches, there is a relay RD for detecting the operating state connected to the door switch SWI, an ignition switch SW3.
Relay RE for holding the release operation, Relay RF for manual power when sending to the motor M, Relay RG for holding the return operation
, relay RH for manual power when returning to motor M, starting relay R1 connected to ignition switch SW3
It consists of:

Limit switch LS4. LS5 has an on contact a and a switching contact S, and due to the positional relationship with the push-pull cable 37, the limit switch LS4 is at the on contact a in the section corresponding to the extending operation of the reach member 39, and the limit switch LS5 is at the on contact a. is set to be on the on-contact a side only when the reach member 39 is near the storage position δ, and to be on the switching contact side in all other cases.

The relay RD for detecting the operating state has a normally closed contact rdl and a normally open contact rd2, the relay RE for holding the release operation has a normally open contact tel, and the relay RF for manual power at the time of release has a normally closed contact rdl and a normally open contact rd2. The relay RG for holding the return operation has a normally open contact rgl, the relay RH for manual power at the time of return has a switching contact part tel, and the starting relay R1 is normally open. It has an open contact ril and a normally closed contact ri2.

Next, the operation of the second embodiment will be explained.

When no one is seated in the front seat 10, the reach member 39 moves rearward and is in the stowed position, and when the front seat 10 is seated and the door is closed,
The motor M is started, the push-pull cable 37 is let out from the drive part 47, and the reach member 39 moves forward and stops at the extended position. The seated person can easily pull the webbing 31 by placing his or her hand on the shoulder portion 31a.

When the webbing 31 is wrapped around the body and the tongue plate 34 is inserted and fitted into the buckle 35, the motor M is restarted and the push-pull cable 37 is pulled in by the drive unit 47, and the push-pull cable 37 is connected to the reach member 3.
9 is moved and stopped at the storage position.

Next, the operation of the control section 45a having the electric circuit shown in FIG. 9, which controls the above operation, will be explained.

When the car is empty, the limit switch LS4 is on contact a side, and when you get into the car and close the door, the door switch SWI turns off, and when you insert the key plate into the ignition key hole and operate it, the ignition switch S turns on.
W3 is turned on and starting relay RI operates. This point is the delivery start position shown in FIG.

Since the normally closed contact rdl of the relay RD for detecting the operating state is closed, the relay RE for holding the sending operation and the relay RF for manual power during sending are energized and energized, and the normally open contacts rel, The switching contacts rfl are turned on, and the motor M is energized through these contacts, and the motor M rotates in the extending direction and the push-pull cable 37 is paid out.

When the reach member 39 reaches the extended position, the limit switch L
When S4 switches from ON contact a to switching contact S, the relay RE for holding the holding operation and the relay RF for manual power during feeding are no longer energized, and the motor M is stopped.

As described above, the reach member 39 moves to the extending position while holding the shoulder portion 31a of the webbing 31, and the seated person can easily put their hand on the shoulder portion 31a and release the webbing 31.
Pull it and attach it.

When the webbing 31 is wrapped around the body and the tongue plate 34 is inserted and fitted into the buckle 35, the belt switch SW2 is turned on. The storage operation of the reach member 39 starts from this state.

When belt switch SW2 is turned on, power is applied through the switching contacts of LS5 and the switching contacts of limit switch LS4 to relay RG for holding return operation and relay RH for power manual power at the time of return. Relay R
The switching contact section rhl of H is switched to energize the motor M from the opposite direction, and the motor M rotates in the opposite direction to that during the feeding operation.

When the reach member 39 moves back and the limit switch LS5 on the switching contact side switches to the on contact a side, the relay RG for holding the return operation and the relay RH for manual power at the time of return are no longer energized, and the motor Power to M is cut off.

This retracted position is not a complete stowed position, but if you drive as it is and then open the door, the normally open contact rd2 will turn on.
The motor M rotates by energizing the relay RG for holding the return operation and the relay RH for manual power at the time of return, and when the limit switch LS4 is switched to the on contact a, it reaches the storage position and stops.

When the door is opened during operation, the door switch SWI is turned on, the relay RD for detecting the operating state is energized, and the normally closed contact rdl is opened. If the ignition switch SW3 is also turned off during the feeding operation, the normally closed contact rdl is opened, and the relay RE for holding the feeding operation and the relay RF for manual power during feeding are no longer energized, and the motor M is no longer energized. Current in the forward rotation direction is cut off.

During the storage operation, even after the limit switch LS5 is switched to the ON contact a, the motor M continues to be energized through the switching contact of the limit switch LS4, and the reach member 39 is reliably returned to the storage position.

If the door is opened for some reason during the delivery operation, the door switch SWI is turned on, the relay RD for detecting the operating state is operated, the normally closed contact rdl is opened, and the normally open contact rd2 is closed.

Even if the normally closed contact rdl is opened, the normally open contact rel of the relay RE for holding the sending operation is closed and self-maintaining, so the relay RE for holding the sending operation.

The power supply to the relay RF for manual power at the time of submission continues. However, at the extended position, the switch switches to limit switch LS4 or switching contact S, so the relay R for holding the extended operation is
E. The power to the relay RF for manual power is cut off at the time of submission.

On the other hand, since the limit switch LS5 is located at the switching contact point, the normally open contact rd2, which is closed, energizes the relay RG for holding the return operation and the relay RH for manual power at the time of return, and the reach member 39 is placed in the storage position. Move to.

That is, in the second embodiment as well, as long as the door is open,
When the reach member 39 moves to the storage position and the door is open, there is a possibility of getting in or out of the rear seat, so the reach member 3
9 returns to the storage position and waits.

FIG. 11 shows a third embodiment, in which an arm-shaped reach member 39c is provided, and a guided pin 39d at the base end of the reach member 39a is inserted into the guide groove 26a of the guide rail 25a arranged along the roof rail of the automobile. are slidably fitted together. The operation is similar to the first embodiment.

"Effects of the Invention" According to the seat belt device according to the present invention, the reach member of the webbing is provided at a position apart from the backrest at the upper side of the vehicle compartment, making it difficult for a seated person to fasten the seat belt. In the case of seatbelt placement, the shoulder part of the webbing is held out in a position where it is easy to put your hand on it, which improves the operability of fastening the seatbelt and is expected to improve the seatbelt wearing rate.

In addition, the reach member always returns to the storage position when the door is opened, so there is no need for extra operations when getting in and out of the rear seat, making it easy to use.The small size and simple structure minimize cost and space. That's enough.

[Brief explanation of the drawing]

1 to 7 show a first embodiment of the present invention, and FIG. 1 is a conceptual front view of a seat belt device. FIG. 2 is a side view of the automobile, showing the interior of the vehicle. Fig. 3 is a partial perspective view of the interior of the vehicle, Fig. 4 is an explanatory drawing showing a state in which the shoulder part of the webbing is extended, Fig. 5 is an explanatory drawing showing the seat belt in the same state, and Fig. 6 is an explanatory drawing showing the state in which the seat belt is attached. The circuit diagram, FIG. 7 is an explanatory diagram showing the relationship between the limit switch and the cam surface, FIGS. 8 to 10 show the second embodiment, and FIG. 8 is a conceptual front view of the seat belt device. FIG. 9 is an electric circuit diagram of the control section, FIG. 10 is an operation timing diagram, and FIG. 11 is a front view of main parts of the seat belt device according to the third embodiment. lO...Front seat 11...Backrest 20.
...Vehicle body 21...Gateway 22...Side wall 24-...Rear villa 25...Guide rail 26...Guide groove 30a...Seat belt device 31...Webbing 31a...Shoulder portion 32 ... Relay anchor 33 ... Retractor 3
4... Tongue plate 35... Buckle 37.
...Push-pull cable 40.40a...Operating mechanism 42...Drive disc 45
．． 45a...Control unit 47...Drive unit M...Motor LSI to LS5...Limit switch a...On contact b...Switching contact swi...Door switch SW2...Belt switch SW3 ...Ignition switch RD~RI...Relay

Claims (1)

[Scope of Claims] A webbing relay anchor is provided at a position spaced apart from the backrest at the upper side of the vehicle interior, and the webbing extends into the vehicle interior from a retractor that retracts the webbing via the relay anchor, and the webbing shoulder In a seat belt device that is designed to pull the webbing forward, a reach member is disposed on the vehicle body to move the shoulder portion of the webbing between a storage position near the relay anchor and an extended position in front of the storage position, and the webbing an actuating mechanism that operates the reach member so that the shoulder portion of the reach member is displaced between a storage position and an extended position; the guide portion of the reach member is normally held in the storage position; and at least when the door is closed, the guide portion is 1. A seat belt device comprising: a control section that moves the guide section to an extended position and always returns the guide section to a storage position when a door is opened.