JPS60157943A - Seat belt winding method - Google Patents

Abstract

PURPOSE:To facilitate the operation of wearing a belt and relieve a sense of oppression by driving a driving means for a certain time when a buckle is joined to a tongue. CONSTITUTION:When a seat belt 12 gets slack, a slip joint 4 is rapidly returned by its own weight and by the assisting force of a coil spring 61. A base terminal 71 made of a conductive material is provided on the outer periphery of an insulating collar 46 by means of joining, plating, etc., while a movable contact terminal 72, which is mated with the base terminal 71, is formed in an integrated form with a coil spring 61, in the vicinity of its movable end 612. The base terminal 71 and the movable contact terminal 72 constitute a slack sensor 7, which detects the slackening of the seat belt 12.

Description

[Detailed description of the invention] Technical field The present invention relates to a method for winding up seat belts.

The seatbelt winding method according to the present invention is applied to a seatbelt installed in an automobile to protect the occupants of the automobile.

Prior Art In conventional seatbelt winding openings, the tensioner of the spring spring is constantly hung on the seatbelt, which creates a feeling of pressure on the body when the belt is worn, making it uncomfortable. Furthermore, there is a problem in that the belt is stretched and heavy when the belt is put on, making it difficult to put on the belt.

OBJECTS OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a practically convenient method for winding up a seat belt, which makes it easy to wear the belt and alleviates the feeling of pressure on the body.

Structure of the Invention In the present invention, there is provided a slip joint operation detection means for detecting the slackness of the seat belt by the operation of the slip joint, and a reverse means for detecting rotation of the winding device in the belt winding direction υ and the winding direction. A seatbelt slackness detection means having a direction rotation detection means, a seatbelt retractor 9 means, a drive control means for receiving a signal from the seatbelt slackness detection means and generating a signal for controlling the drive means, and a signal from the drive control means. Using a driving means for driving the receiving and winding υ means,
When the buckle and the tank are coupled, a seat belt winding method is provided in which drive control is performed to drive the drive means for a predetermined period of time.

Embodiment An apparatus to which a multi-method seatbelt winding method is applied as an embodiment of the present invention is shown in FIG. The configuration of the retractor portion of the device shown in FIG. 1 is shown in FIGS. 2 and 3. Regarding the device shown in FIG. 13, reference may be made to Japanese Patent Application No. 58-102243 "Seatbelt Winding Device" filed by the present applicant.

In the device shown in FIG. 1, the device shown in FIG. 2, and the device shown in FIG. 3, 1
Reference numeral 0 denotes a retractor main body as a seat belt retractor 9, and this retractor main body IO is fixed to the vehicle body by a bolt (not shown) inserted through a hole 101. A belt winding shaft 11 having a recess 111 and a through hole 112 is rotatably supported in the retractor body 10 . A loop portion 121 is sewn to one end of the seat belt 12 for the three-point seat belt system, and the belt winding shaft 1
1 in the loop portion 121 in the recess 111.
3 prevents the seatbelt 12 from coming off from the belt winding shaft 11.

A motor 20 is attached to the retractor body lO as a driving means for retracting the seat belt.
Here, the output shaft 21 of 0 is directly operatively engaged with the belt winding shaft 11.

The seal winding shaft 11 is rotated in the counterclockwise direction in FIG. 2 by driving the motor 20. On the other hand, seat belt 1
2 from the retractor body 10, the output shaft 21 of the motor 20 idles due to the pulling force, and the belt winding shaft 11 rotates clockwise in FIG.

A pendulum 31 is supported by a bracket 30 fixed to the retractor body 10 so as to be able to swing 1''.

The Jin's pendulum 31 swings and pushes up the pawl 32 when a shock occurs due to a vehicle collision or the like. With this, the protrusion 321 of the bowl 32 is connected to the gear 33 fixed to the belt winding υ shaft 11.
The rotation of the belt winding shaft 11 is locked.

Seat bell pulled out from the retractor body lO) 12
As shown in FIG. 4, the retractor body 10 is inserted into and supported by a sliding shaft 4 provided above the retractor body 10, and is further connected to an anchor ANC attached to one side of the passenger seating part through a tank plate 50. . The tank plate 50 has a buckle 51 connected to the other side of the passenger seating area.
By connecting the tank grate 50 to the buckle 51, the seatbelt 12 can be attached to the occupant.

The buckle 51 has a built-in buckle sensor 52 that detects whether or not the tongue plate 50 and the buckle 51 are connected. It consists of

The slip joint 4 has a ring portion 41 having a hole 411 through which the seat belt 12 passes, and a plate portion 42 attached to the ring portion 41. The plate portion 42 is shown in FIG. It also has a hole 421 as shown.

The hole 421 of the plate portion 42 is rotatably fitted into a bolt 44 which is a pivot attached to the vehicle body frame 43, and the slip joint 4 is rotatable around the bolt 44. It becomes.

The bolt 44 is coated with a collar 45, and the collar 4
5 is clamped and fixed between a stepped portion 441 formed on the bolt 44 and the vehicle body frame 43.

An insulating collar 46 surrounding the collar 45 is fixed to the outer periphery of the collar 45. A flange portion 461 extending radially outward is integrally formed on the insulating collar 46 .

On the outside of the insulating collar 46, a coil spring 61 having a larger inner diameter than the outside of the insulating collar 46 is arranged substantially concentrically with the insulating collar 46. The fixed end 613 of the coil spring 61 is fixed to the flange portion 461 of the insulating collar 46, and the movable end 612 of the coil spring 61 is fixed to the cylindrical protective cover 62 fixed to the plate portion 42 of the slip joint 4 with screws. It is attached to the hole 621 of.

The coil spring 61 plays the role of assisting the movement of the sleeve shield 4 due to the loosening of the seat pel 12, that is, the movement from the state shown in FIG. 6 to the state shown in FIG. 4. Therefore, when the seat belt 12 becomes loose, the slip joint 4 is quickly returned to the position shown in FIG. 4 by its own weight and the assisting force of the coil spring 61.

A base terminal 71 made of a conductor is mounted on the outer peripheral surface of the insulating collar 46 by means of adhesion, plating, etc., and a movable contact for the base terminal 71 is provided near the movable end 612 of the coil spring 61. A terminal 72 is integrally formed. The base terminal 71 and the movable contact terminal 72 constitute a slack sensor 7 that detects slack in the seat belt 12.

The configuration of the control circuit C0NT in the device shown in FIG. 1 is shown in FIG. FIG. 8 is a time chart showing the operation. In FIG. 7, 701 and 702 are filter circuits;
05,707 is a D type flip-flop, 7061.70
91.7041.7082.7081 is an oblong amplifier, 52 is a buckle sensor, 7 is a slack sensor, 71O is a motor drive circuit, and 704 is ? 709 is a motor load detection circuit as a direction rotation detection means, 708 is a tangent drive circuit for gradually increasing the motor drive torque, 706 is a motor drive time lag circuit, and 703 is a motor load detection circuit. This is a motor predetermined time drive circuit.

When the contacts of the slack sensor and buckle sensor 52 are off, the filter circuits 701 and 702 are at the "H" level. The signal of the buckle sensor 52 is filtered by a filter circuit 70.
1, and the signal from the slack sensor 7 is input to the filter circuit 702. The motor 20 is also connected to a motor drive circuit 710.

The operation of the FIG. 1 device is distributed below. A passenger wears the seat held 12 on his body and connects the tongue plate 50 to the buckle 51. Then, the switch signal of the buckle sensor 52 changes from off to on), and the motor predetermined time drive circuit 703 issues a fixed time signal TI. When the motor drive circuit 710 receives this signal, the motor 2o is driven for a period of time T1, and the seatbelt 12 is wound up and firmly attached to the occupant's body. This state is indicated by 81 in FIG.

When the seat heald 12 becomes loose when the buckle sensor 52 is in the connected state C (on), the motor soft drive circuit 708 receives a signal from the slack sensor 7 and issues a signal whose duty gradually increases at a predetermined frequency. and,
The signal is input to the seat motor 2o by the motor drive circuit 710, and the motor 20 is gradually driven to gradually tighten the seat belt 12. Also at this time, motor load detection circuit 7
At step 09, the motor load is detected, and when a predetermined load is reached, a signal is issued to stop driving the motor, and the motor 20 is stopped. In addition, this state is 83a*83b in FIG.
, 83e (D state theal.

Further, when the slack sensor 7 is turned on in the released state of the buckle 5, the time lag circuit 706 is activated and the motor 2o is activated after a certain period of time To. At this time as well, the motor load detection circuit 709 detects the motor load, and when a predetermined load is reached, a signal is issued to stop driving the motor, and the motor 20 is stopped. m8 diagram tetri,
84a184bt84c.

The slackness of the seat belt 12 that can be detected by the strain sensor 7 is only the slackness 141 between the retractor body 1o and the slip joint 4, and the slackness between the slip joint 4 and the buckle 51. Therefore, buckle 50 and anchor A
When the belt winding shaft 11 and the motor 20 are loosened and the seatbelt 12 is pulled out, the belt winding shaft 11 and the motor 20 rotate in the opposite direction. This reverse rotation generates a negative electromotive force from the shimotor 20. This is detected by the motor back-movement t5 detection circuit 704, and the motor 20 is activated after the withdrawal is completed. In this case, in the buckle-released state, the time rough circuit 706 operates for a certain period of time T. Later, when the motor 20 operates and reaches a predetermined load, the motor load detection circuit 709 causes the motor 2 to operate.
0 stops. In FIG. 8, they are 85a, 85b, and 85c.

In addition, in the buckled state, after the withdrawal is completed, the motor 20 is gradually driven by the motor soft drive circuit 708, and when a predetermined load is reached, the motor load detection circuit 70
9, the υ motor 20 is stopped. In Figure 8, 86g+8
6b and 86c.

When the occupant releases the connection between the tank plate 50 and the buckle 51, the switch signal of the buckle sensor 52 changes from on to off, and the motor predetermined time drive circuit 703 issues a fixed time signal T.

Then, the motor drive circuit 710 receiving this signal drives the seat motor 20 for 71 hours, and the seat belt 12 is wound up.

The 70-chart of the flow of operation of the control circuit in Figure 7 is shown in Figure 9.
As shown in the figure. Each step in the flowchart of FIG. 9 is as follows.

(+) When the buckle is connected or touched, the belt is wound with the highest priority in any of the following conditions, and stops after the set time T (Step S) 01 to 8104
.

(If) When the belt is pushed out and the step is detected by the step sensor after the belt has finished being extended, the belt is immediately tried to be wound up. It depends on whether it is present (steps 8105 to 8108).

(Ill) When the buckle is connected, the belt is gradually wound up by the soft start, and when a predetermined load is reached, the winding is stopped (steps 8109 to 8113).
).

(IV) Time lag T when the buckle is released. Afterwards, belt winding begins. When the predetermined load is reached, the winding stops (steps 8110 to 8113).
.

Another example of the control circuit is shown in FIG. FIG. 11 is a time chart of its operation. In the apparatus shown in FIG. 1O, when the strip sensor 7 is turned on in the buckled state, the motor soft drive circuit 708 gradually drives the motor 20, but the step sensor 7 signals the motor to stop driving. This is done at the falling edge of the signal. This can be seen at 87a, 87bs87c in FIG.

Other operations are the same as in the case of FIG. The 10th drawing route is mainly knot gate 721. anime) 7
22 and an OR gate 723 are different from the circuit shown in FIG.

Effects of the Invention According to the present invention, it is possible to realize a practically convenient method for winding up a seatbelt, which makes it easy to wear a belt and relieves the feeling of pressure on the body.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a device to which the seatbelt winding deer method as an embodiment of the present invention is applied, and Figs. 2 and 3 both show the configuration of the IJ) tractor part in the device shown in Fig. 1. Figure 4, Figure 5, and Figure 6 all show the configuration of the slider four in the device in Figure 1, and Figure 7 shows the
Figure 8 is a waveform diagram showing the signal waveforms of each part of the circuit in Figure 7. Figure 9 is a flowchart showing the operation flow of the circuit in Figure 10.
Figure O is a diagram showing another example of the control circuit, and Figure gt1 is a waveform diagram showing waveforms of signals at various parts of the circuit in Figure 10. (Explanation of symbols) 10... Retractor body, 11... Belt winding υ
Shaft, 12... Seat belt, 13... Rod, 20...
・Motor, 21... Motor output shaft, 30... Bracket, 31... Pendulum, 32... Bawl, 4
...Slip joint, 41...Ring part, 4
2... Plate portion, 43... Vehicle body frame, 44.
...Bolt, 45...Collar, 46...Insulation collar, 50...Tank plate, 51...Buckle,
52... Buckle sensor, 61... Coil, 6
2... Protective cover, 7... Nurak sensor, 71
...Base terminal, 72...Movable contact terminal, C0NT...Control circuit, ANC...Anchor, B
AT...storage battery. Patent Applicant: Japan Auto Parts Research Institute Co., Ltd. Patent Application Agent: Ro Aomi, Patent Attorney: Kazuyuki Nishidate, Patent Attorney, Masashi Matsushita, Patent Attorney, Akira Yamaguchi, Patent Attorney: Masaya Nishiyama Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. Slip joint operation detection means for detecting slack in the seat belt by the movement of the slip joint and detecting rotation of the winding system in a direction opposite to the belt winding direction. A seatbelt slackness detection means having a reverse rotation detection means 2, a seatbelt winding means, a drive control means that receives a signal from the seatbelt slackness detection means and generates a signal for controlling the drive means, and a signal from the drive control means. A seatbelt winding deer method that uses a driving means to drive a receiving winding means, and when the buckle and the tank are connected, drive control is performed so that the driving means is driven for a certain period of time. 2. When the buckle is connected and the belt is worn, the drive control means sets the time lag to a phantom zero according to the signal from the seat belt slack detection means. The method described in section. 3. When the buckle is connected and the belt is worn, the change from the off state to the on state as a signal of the slip joint operation detection means, that is, the change from belt slack to no slack, is used as a hail signal. 2. A method according to claim 1, characterized by driving a yoshimotor.