JPS58139845A - Safety belt winding-up device - Google Patents

Abstract

PURPOSE:To keep the safety belt in optimum tension and improve the safety by heightening the tension of the belt in case of emergency by a method wherein the winding-up of the safety belt is performed by a motor, which is run at high speed in case of emergency. CONSTITUTION:A motor 7 and a shaft 2, onto which the safety belt 3 is taken up, are connected to each other through a speed reduction mechanism 8. A detecting member for rotational direction of the shaft 2 consists of a pulser 20 fixed to the shaft 2 and contacts A, B and E provided on the frame 1. In addition, an inertia responding device 22, which actuates in case of emergency, is provided on the frame 1. The driving of the motor 7 is controlled by a controlling circuit 12. Concretely, the controlling circuit 12 controls the motor by driving it so as to apply the torque, the magnitude of which is determined to be either one step of the two steps of large torque and small torque by means of the signals from said detecting member and a signal from a buckle switch, to the belt 3. Moreover, in case of emergency, the controlling circuit 12 runs the motor 7 at high speed by means of the signal from the inertia responding device 22 so as to generate the torque larger than said torques.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a safety belt retractor installed in a vehicle or the like.

In conventional winding devices used for vehicle safety belts, an unwinding spring (
A return spring (hereinafter also referred to as a return spring) is attached, and the tension belt is wound up by the spring force of this spring.

This kind of return spring is designed so that tension is always applied to the safety belt when the belt is pulled out, so for example, if the driver maintains a normal driving posture after tightening the safety belt, This will give a feeling of pressure. Ninth, once the safety belt is fastened and the driving position is maintained, a safety belt retractor is required that is equipped with a mechanism that temporarily relieves the tension on the safety belt due to the return spring. become.

The present invention was made in response to the above-mentioned request, and by winding up the safety belt mainly by motor drive, the tension of the safety belt can be adjusted to the optimum state according to the driving posture of the driver. A safety belt retractor WI that can maintain the tension below C (also referred to as tension) and in addition, can instantly apply strong tension to the belt in an emergency.
The purpose is to provide L.

The present invention will be specifically explained below using Examples.

The first figure is a schematic exploded perspective view showing one embodiment of the safety belt retractor of the present invention, and the second figure is an assembled front view of the same. In the figure, reference numeral 1 denotes a frame having a U-shaped cross section and is fixed to the vehicle floor or seat by appropriate means.

There is an insertion hole 1C between this frame 10 flesh side 1i1A and 18.
A shaft 2 is rotatably supported through the shaft 2, and one end of a safety belt 3 is fixed to the shaft 2 so that it can be wound up. As a result, the direction of the arrow X becomes the rotational direction when the belt is pulled out, and the reverse direction Y becomes the rotational direction when the belt is wound. In addition, the shaft 2 protrudes outward (to the left in the figure) from one side plate, and at the protruding tip there are two rectangular fitting central parts for fixing a shaft drive gear, which will be described later. is provided. 1uFi This is the insertion hole for the cylindrical shaft, which will be described later.

Furthermore, an insertion hole 4 for the shaft 2 is provided on the side surface of one of the side plates.
Insertion hole 4 for inserting the shaft portion of the drive gear described later
Nine retainers 4 are provided. The retainer 4 is also provided with mounting holes 4c and 4C for mounting gear holding plates, which will be described later. 5Fi gear holding plate with a convex cross section and mounting holes 50, 5 at both ends.
C is provided, and holes 5A and 5B for holding reduction gears, which will be described later, are provided in the raised portion of the intermediate portion.

And this gear holding plate) STI inner tin mounting hole 5c
, 5c, and are attached to the attachment holes 4C, 4C of the thread retainer 4 by appropriate means such as screws. The shaft portion 6A of the drive gear 6 is rotatably inserted through the insertion holes jD and 4B of the retainer 4 and the side of the frame 6.
The AK is provided with a fixing hole.
A is scheduled to be inserted.

This motor has 7 leads @7. It is connected to a control circuit block 12 via B, the details of which will be described later. A reduction gear mechanism 8 is attached to the gear holding plate 5. This reduction gear machine #I8 includes a lIl, 1fjk gear 8A that meshes with a portion 6B of the drive gear 6, and a second reduction gear 8B that is coaxially fixed to the 011.1 reduction gear BA.
A Gai 3 reduction gear 8C meshing with the second reduction gear 8B,
A fourth reduction gear 8D is coaxially fixed to the third reduction gear 80, and nine rotation pins 8E are used to rotatably attach the first and second reduction gears to the mounting hole 5B of the holding plate 5.
Said 3rd. Mounting hole 5 of plate 5 holding the fourth reduction gear
Rotating bin 8F rotatably attached to a person and corner rotating pin 9
It is composed of a connecting plate) 8G which rotatably connects E and 8F. A shaft drive gear 9 is fitted into the fitting protrusion 2A at the protruding tip of the shaft 2 through nine fitting holes, and this shaft drive gear 9 is connected to the reduction gear 4.
It meshes with reduction gear 8D of $18 WJ4. Further, a pulser 20 is fixed to the tip of the shaft 2 that projects outward (to the right in the figure) K from the frame side plate 1B. For example, as shown in FIG. 5, this pulser 20 has a conductive foil pattern (for example, copper foil) on the surface of a disk-shaped substrate (for example, epoxy resin) 20A that is fixed to the belt winding shaft 2.
This copper foil has a circular grounding part 21E on the inner wall part, a middle part 21 connected to this and extending radially to the outer periphery, and an outer part extending from the middle part via the stepped part. For example, contacts E, A, and B, which are fixed to the frame 1, are arranged at positions corresponding to each region (see FIGS. 2 and 3). Note that a lead wire (not shown) extends from each contact, and the tip of the lead wire is n
'l;It: Connected to the control circuit block 12.

This pulser 20 and contacts E, A, and B constitute a shaft rotation direction detection member. Furthermore, Freneau 111
An inertial sensing device (hereinafter also referred to as a G sensor) 22 is attached to the outside of the 11 & IH to be produced in case of an emergency such as a vehicle price crash. This G sensor 22 is configured to close a switch by, for example, the displacement of a pendulum, suppress the air pollution, and send it to the circuit.

FIG. 4 is a schematic exploded perspective view showing the structure of a device according to another embodiment of the present invention, and FIG. 5 is a partially assembled sectional view of the main parts thereof. In the figure, the same reference numerals are given to the same members as those in the previous embodiment, and detailed explanation thereof will be omitted. The difference between this device and the previous embodiment is that three planetary gears 31A to 3 are connected to the tip of the shaft 2 via three pins 30A.
1C is attached to the disc-shaped carrier plate 30,
Side plate 1AK fixes an internal gear 32 that meshes with the planetary gear, and also provides a sun gear 33 that commonly meshes with the planetary gears 31A to 31C, and fixes a flat motor 7' to the internal gear 32. , the sun gear 33 is fitted and fixed to the motor shaft 7 of this motor 7'.

FIG. 6 is a schematic exploded perspective view showing the structure of a device according to another embodiment of the present invention, and FIG. 7 is an assembled partial sectional view of the main parts thereof. In this device, a shaft 2' having a motor housing hole 2A' is inserted and supported in frame side plates 1A and [B], and a structure equivalent to the carrier 3o shown in FIG. 4 is installed at the end of the motor insertion hole 2A'. A cup-shaped inner gear 52' that meshes with the planet gears is fitted and fixed to the protrusion of the carrier 30', and the cup-shaped inner gear 52' that meshes with the planet gears is covered with the planet gears 31M to 31C and the sun gear 33 in mesh with each other. After fixing the pulser 20 to the side plate and the flange at the other end of the shaft 2', insert the small motor 7 with the shaft 7A fixed to the sun gear 33 into the motor storage hole 2A'. The bracket 54 to which the motor 7 is attached in good condition is fixed to the frame side plate IBK.

Next, the contents of the control circuit block 12 will be explained with reference to diagram WJ8. This control circuit block (simply 11111
(Also called I41 circuit) 12ti above pulser? A phase detection circuit 13 inputs the contact outputs balsar A and pulsar B and detects their phases, and gates the pulser human output and the two outputs C and D of the phase detection circuit 13 to generate two outputs E and F, respectively. Two A〈dogut ANIJ, , which generate
ANDtJ - the output of the take-up side (W) pulse processing circuit 14A, the output side (D) pulse processing circuit 14B, the D pulse processing circuit 14H, the time lag circuit 15 that gives a time lag to the output, and the output of this time lag circuit 15. A first memory circuit 16 for storing data, an inverter IN for inverting the output of the D-pulse processing circuit 14B, and a buckle that operates depending on the state of engagement between a tong (not shown) provided at the tip of the safety belt 3 and a buckle. a transition detection circuit 17 that outputs a pulse every time the output signal of the switch SW changes;
A second 1 storage circuit 18 that stores the output of this transition detection circuit 17, and the output of each storage circuit 1, 6.18.

An OR gate OR1 that outputs the output of the W pulse processing circuit 14A, this ORI, and the inverter I.
AND gate AND which makes each output of Nl two-man power,
AND gate AND which uses the output of the inverter IN and the signal from the ignition switch (not shown) using two people.
, the signal from the buckle switch 8W1 and the G
AND gate A that uses two people to generate the signal from the sensor 22
ND, "and said motor 7 (7') K first electric fIL1
141 transistor Tr connected in series via the limiting circuit 19A, and transistor Tr similarly connected in series via the motor 7 (7') K second current limiting circuit 19B.
and a transistor Tr, which is also connected to the motor 7 (7'), and each of the ant games) AND, ~AND
The transistors Trl and Tr are configured to be driven by the outputs of the transistors Trl and Tr. Here, current limit circuit 1
9 and 19B are set so that the current flowing through the transistor Tr is larger than the current flowing through the transistor Tr, and the current flowing through the transistor Tr is also smaller. There are restrictions. That is, 1. >1. >I holds true, and therefore the torque of the motor 7 (7') changes. As will be explained later, the motor torque is kept relatively low to give the occupant the appropriate tension when the belt is attached, and the motor torque is slightly lowered when absorbing the slug generated in the belt and when storing the belt. This is because it is necessary to maximize the torque of the motor and apply high tension to the belt in an emergency.

For example, as shown in FIG. 9, the phase detection circuit 13 includes inverters IN, IN, which inverts the outputs from the contacts A and B for the pulser 20, and a D-type flip-flop F.
It is composed of F. When the above-mentioned pulser 20 and the contacts E, A, and B are in the relationship as shown in FIG. 10, when rotating clockwise (CW), the outputs A, 13° A, and 13° A, as shown in FIG. B and Q are obtained, the winding direction rotation (Winding, W) is detected, and when the rotation is counterclockwise (CCW), #! 11 Rotation in the drawer direction (1)rawer, D
) is now detected.

For example, as shown in FIG. 12, the control compliance detection circuit 17 is connected to the power supply Vcc and back!・Second exclusive logic that makes the output J and output J obtained through the time constant circuit (to the resistor and from the capacitor C6) of the switch 8 kite EXO
R, and a third exclusive logic (gXOR) in which the output of this second exclusive logic (gXOR) and the output H of the buckle switch 8W are powered by two people, and the buckle switch Every time the signal H of 8W changes, a pulse-like output having a predetermined width T as shown in FIG. 15 is generated. This predetermined width T can be set to any value KvI4 depending on how the time constant circuit is set.

Next, the operation of the above-mentioned component device will be explained with reference to an explanatory diagram of control operation torque in FIG. 14.

First, when the passenger sits on the seat inside the car and turns on the ignition, the control MIIi! Since the output of the inverter IN in the circuit 12 is at the Hu level, the output of the AND gate AND turns on the transistor Tr, causing the motor 7 (7') to control the current VL.
Since 't flows, the belt 5 is subjected to torque in the winding direction, thereby preventing the belt from sagging or the like.

Next, when the passenger pulls out the belt 5 to attach the belt, at this time, the Luther 20 rotates in the hour hand direction (CW), so the Luther output is generated first,
After that, in a partially wrapped state) (Luther B output is generated (S>O state in Fig. 11).

Fig. 8 Phase detection circuit 15F in control circuit 12 without rc
Since outputs of "iC=rH" and D=rLJ are generated, the D pulse processing circuit 14B is activated by the pulse output PK of "AND" and outputs the rHJ level output. This "H" level output is rLJ by INNO(-TAIN).
Since the level is inverted, the transistor l1lrI becomes 11
1) The output G of the AND gate AND4 which controls the transistor Tr, and the output of the AND4 which controls the tube are both [LJ level, this transistor Tr, Tr.
, are turned off, so the motor 7 is not driven to rotate, and is in an idling state, allowing the belt to be pulled out smoothly (Fig. 14 (1)).

Next, when the occupant pulls out the safety belt 3 to a desired length and engages the tongs in the buckle (not shown), the buckle switch Swl turns "on" and at this moment the transition detection port [1
From 7 onwards, a pulse-like output as shown in Fig. 13 occurs,
Since this is stored in the second memory circuit 18Kle, the memory output ("H" level) is input to the OR gate O, and the output of the OR gate O becomes the rHJ level. If the occupant releases the safety belt 5 once the tongue is engaged with the buckle, the safety belt will slacken (slap). At this stage, the belt winding shaft 2 begins to rotate in the belt winding direction, so the pulser 20 rotates in the belt winding direction and outputs pulses as shown in A and H in FIG. 11 (b). Occur. As a result, the output of the phase detection circuit 13 is C=LJ, D=rHJ, and the AND gate AND.

A pulse-like output E is generated from the W-side pulse processing circuit 14, and an rHJ level output is generated from the W-side pulse processing circuit 14. -7jD@The output of the pulse processing circuit 14B falls to the rLJ level, and this falling state is transmitted to the first storage circuit 1 via the time lag circuit 15.
6 is stored. At this time, the output Fi of OR,
Since the output of the inverter IN is at the rHJ level and the output of the inverter IN is at the "H" level, the output G of the ant gate (AND) becomes the rHJ level and the transistor Tr becomes conductive. At the same time, the transistor Tr also becomes conductive, so that the motor 7 (7') is rotationally driven by the limiting layer fLL and the limiting current. Therefore, the rotation of the motor 7 (7') quickly absorbs the slack on the safety belt 3 (the state shown in FIG. 14 (2)).

When the slug is absorbed and the safety belt 3 is fitted to the occupant (belt attachment complete state), the W-side pulse processing circuit 14A is turned off and its output changes from "H" to "L".
Since it falls, the memory circuits 16 and 18 of the first and second mackerel 2 are cleared, and the gate of the AND gate ANL) is closed, so the motor 7 (7') is driven only by the limiting layer tIt (Fig. 14 ( 4) condition). Here, if the torque of the motor 7 (7') when driven by the III current limit current is set to be, for example, about 5 Kff·■, appropriate tension will be applied to the occupant.

When the occupant takes a forward leaning position after the safety belt has been completely attached, the safety belt 3 is pulled out, so there are two ANDs as described above.

Both AND gates are closed, the motor is not driven, the motor 7 (7') idles, the passenger returns to the original position, and at 9 o'clock, the gates of the AND gate are opened,
The motor 7 (7') K limited current 4 flows to wind the belt, and the slug generated in the belt 3 is absorbed (FIG. 14 (5) and (6)).

When the buckle is released to remove it from the attached state, the transition detection circuit 17 is activated by the output of the buckle switch 8W.
A pulse-like output is generated from the second storage circuit 18, and an rHJ level output is generated from the second memory circuit 18. At this time, the output of the D side pulse processing circuit 14B is at the rLJ level, so the AND3. The gates of AND4 are both opened, the motor 7 (7') is rotationally driven, and the safety belt 5 is wound with a large torque.

At this time, if the safety belt 3 is caught in the seat force, the output of the Wsen pulse processing circuit 14 will fall to the rLJ level, so the motor 7 (7') is driven only by the Fi limited current -. be done. When the cause of the safety belt 3 being caught is removed, the output of the W@pulse processing circuit 14A becomes rHJ level, the motor 7 (7') rotates with a large torque, and the belt is retracted as described above. (Figure 14 (shape 11 of η).

When the safety belt 3 is completely retracted and the belt stops moving, the output of the Wgs pulse processing circuit 14A changes from rHJ to rLJ.
Since the voltage falls, the gate of the AND gate AND closes and the motor 7 (7') is driven only by the limited current. By turning off the ignition switch, the motor 7 (7')
') stops rotating and becomes unused (Fig. 14 (8)).
), (9)).

Next, in the event of an emergency such as when the vehicle is involved in a collision while the occupant is wearing the safety belt 3 and the safety belt 3 is in good condition, the G sensor 22 operates and generates a signal, so the
An output is generated from AND, the drive transistor Tr becomes conductive, and a large current ■ instantaneously flows through the motor 7 (7'), and as the motor rotates at high speed, the tension of the safety belt 3 increases. be rapidly increased. By setting the torque at this time to, for example, 30 to 4511f@f■, the safety of the occupants is ensured (Fig. 14 QO)
. At this time, the other transistor Tr is also conductive, so the current flowing through the motor 7 (7') KR is 11. Therefore, the torque will be further increased. In general, when the vehicle stops after a second accident occurs, the G-sensor 22 returns to its original state (resets), so the occupant can easily disengage by removing the tongue from the buckle, but the G-sensor 22
Buckle switch SW in case 2 does not return to its original state.
If a reset button is provided in either the signal path of , or the signal path from the Fig sensor 22, troubles during use can be prevented.

In the above operation explanation, if it takes some time to pull out the safety belt and engage the tongue with the buckle in order to put on the safety belt. )K, the output of the first memory circuit 16 becomes rH'' level, the motor 7 (7') is driven, and belt winding operation is performed. After the operation setting time of the processing circuit 14A, the output of the W@pulse processing circuit 14A becomes rH.
Since rLJK falls from J, the motor 7 (7') is driven only by the limited current M, so that it does not affect the subsequent drawing operation.

The present invention is not limited to the embodiments described above, but can be implemented in various modifications.

FIG. 15 shows another embodiment of the control circuit constituting the present invention. This circuit is provided with a pulser 20' that generates a pulse-like output f intermittently by the rotation of the shaft in place of the pulser 20, and outputs an "H" level output when a pulse output from the pulser is detected at the downstream stage of the pulser 20'. A pulse processing circuit 31 is provided which generates an rLJ level output when no pulse is input, and a Noah gate NO. By the output of the NOR gate NOR.

The motor 7 (7')K drives a Darlington-connected transistor Tr connected in series with the current limiting circuit 34B, and also connects the first and second one to the output side of the buckle switch 8W via an inverter IN. Connect shot circuits 32 and 35 in parallel.

An OR gate 0R1) is provided to output the output of each one-shot circuit 32.55 by two people, and this OR gate 0R1) is provided.

The output drives a Darlington-connected transistor Tr4 connected to the ground side of the motor 7 (7') via a current limiting circuit 54A. Then, a "C motor 7"(7'
), a Darlington-connected transistor Tr connected to
is configured to drive. Note that a torque adjustment resistor vB- is provided outside the current limiting circuit 54B.

The operation of such an embodiment circuit is as follows.

If the buckle switch is not in the ON state 11 and the ignition switch 8W is turned on, the transistor Tr is turned on and the motor 7 (7') is limited xal!
flows and rotates in the belt winding direction with a weak torque, so there is no need to worry about the belt slipping off due to vibrations while the car is running, and the ignition switch SW! When K is off, the motor does not rotate, but since the car is stationary, the belt will not slip.

When the occupant tries to pull out the belt to attach it, a pulse output is generated from the pulser 20', and the pulse processing circuit 5
1 to rf (J level output is generated, so the transistor Tr is turned off, stopping the rotation of the 9 motor 7.7',
The belt can be easily pulled out since it is in a idling state.

Next, when the tongue is engaged (latched) in the buckle, the second one-shot circuit 33 is triggered, and the transistor T,
is turned on, and the current 11 flows to the motor 7 (7'), so that the winding plate is wound with a strong torque Fi corresponding to the slug of the belt pulled out for installation.゛One shot episode W1t13
The motor 7 (7') rotates only when output is being generated from the pulse processing circuit, absorbs the slug, and when winding is finished, the pulse processing circuit! Since the output of 11 is at the "L" level, the transistor Tr- is turned on and the motor 7 (
7''), the limiting current flows and a weak tension is applied to the belt.

As in the case of the previous embodiment, this tension is set to a value that does not give a feeling of pressure to the occupant. Here, when the belt is pulled out by the passenger assuming the front Mil position, an "H" level output is generated from the pulse processing circuit 31 by the output of the valve ii--20', so the transistor T rl is turned off.毫-Evening 7 (7')
Since no driving current is applied to the motor 7 (7'), the motor 7 (7') is idle, and the movement of the occupant is not restricted. Incidentally, the tension when the belt is attached can be varied by a torque adjustment resistor (R) provided in the current limiting circuit 548, so that the tension can be adjusted according to the passenger's preference.

Next, when the tongs are removed from the buckle for detachment, the one-shot circuit 32 of 1s1 is triggered and the transistor Tr4 is turned on, so that the motor 7 (7') is driven for a predetermined time to quickly wind the flow belt. take. In this case, if the predetermined opening time is set to, for example, 10 seconds, the belt will be reliably wound and the motor will not burn out. Furthermore, even if a situation occurs in which the belt is caught in the seat cap, the motor stops, and the belt is not completely wound, the transistor Tr remains on even after the first one-shot circuit 32 completes its operation. Since the limit [fil,] is flowing through the motor, if the stuck condition is removed, the Pel F will be retracted reliably.

Furthermore, in the event of an emergency situation such as a car collision, #'iG
The sensor operates, and the transistor Tr is driven by the output of NOAG), which connects the large fi to the motor 7 (7').
Since t Is flows, a large amount of tension is applied, and the safety of the occupants can be ensured. In this way, the same operation and effect as in the above embodiment can be obtained.

Further, the configuration of the motor drive system in the control circuit 12 is changed to the 16th one.
It may be done as shown in the figure. That is, the motor 7 is placed on the ground, and the current limiting circuit 19B and the first driving transistor Tr are connected in series between the motor 7 and the power supply +V, and the current limiting circuit 19B and the transistor Tr are also connected in series. Connected in parallel, the emitter of the third driving transistor Tr is connected to the motor 7.7' side, and the collector is connected to the DC-DC
Connect to the output power supply +■, side of the converter 25. This D
The C-DC converter 25 boosts and outputs the power supply +V (for example, 12 cm), and is stabilized by a capacitor C0. As a result, the fifth driving transistor Tr, the driving transistor Tr1. The current 1t-It flowing through Tr can also cause a large current R- to flow,
You can achieve your goals.

According to the present invention described in detail above, when the safety belt is worn, only the weak tension of the sub-spring is applied to the belt, so the occupant can drive comfortably without feeling the pressure exerted by the belt, and at the same time, in an emergency, high torque can be applied. It is possible to maintain the safety of passengers by providing tension. First, since the safety belt can be wound up mainly by the motor, the operation can be made faster and the safety belt can be easily operated. Furthermore, since one control circuit is operated mainly by the rotational output of the pulser and the operation output of the buckle switch, the circuit configuration is simple, and since the operation is simple, the circuit design is also easy. In addition, since the motor uses only the idling state and normal rotation state, low-cost products can be used, and the overall cost of the device can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the device of the present invention;
3 is a front view of the pulsar used in this embodiment, and FIGS. 4 and 5 are schematic exploded perspective views showing the structure of another embodiment of the device of the present invention and its assembly. 6 and 7 are schematic exploded perspective views and assembled partial sectional views showing the structure of other embodiments of the present invention, and FIG. 8 is an example of a control circuit in an apparatus according to an embodiment of the present invention. 9 is a block diagram showing an example of the phase detection circuit used in the control circuit, FIG. 10 is an explanatory diagram showing the relationship between the pulser and the contact, and FIG. 11 (a), Φ) is FIG. 12 is a circuit diagram showing an example of the S shift detection circuit used in the control circuit, FIG. 13 is a rounded time chart for explaining the operation, and FIG. 14 is a time chart for explaining the operation of the phase detection circuit. An operating torque diagram for explaining the operation of the embodiment device,
Figure 915. FIG. 16 is a control circuit diagram of another embodiment of the present invention. 1... U-shaped frame, [A, [B...IH&, 2
...Shaft, 3...Safety belt, 7.7'...
Motor, 8... Reduction mechanism, 12... Control circuit block % 13... Phase detection circuit, 14A, 14B...
Pulse processing circuit, 15... Time lag circuit, 16.1
8... Memory circuit, 17... Transition detection circuit, 2G, 2
0'...Pulsar, SW,...Buckle switch,
SW, ignition switch. Figure 12 Figure 13 (1) '<' 7 emphatic 2) Ha Nfurura Tuna (3) Slur, 7jI;? ') (4) Begging for art (5) The power to do everything (6) λ Ritsuka on the hand of the seal ~ (7) Ha...Full death τI (8) Hepal>-+! r+fJ complete (9) A2, 2, 7ka>0FF (1q! No 1 odd 4 figure., □“124゜−−−−1−−−→−

Claims (1)

[Claims] A safety belt, one end of which is fixed to a belt winding shaft interposed between both side plates of the U-shaped frame, is stored so that it can be pulled out and wound up, and the pulled out safety belt is engaged with a buckle and a tongue. A safety belt winding device for use as a safety belt winding device includes a motor attached to an mE frame plate, a power transmission mechanism that transmits the rotation of the motor to the belt winding shaft, and a power transmission mechanism that transmits the rotation of the motor to the belt winding shaft. a shaft rotation direction detection member that detects the rotational state of the shaft for use and generates a signal; a buckle switch means that detects the engagement state of the buckle and the tongue and generates a signal each time the state changes; an inertial sensing device that generates a detection signal in the event of a vehicle emergency; and each time a signal from at least a buckle switch means is input, a first torque is applied to the motor to drive the motor to rotate in a belt winding direction, and the shaft rotation direction is detected. When a rotation signal in the belt pull-out direction is output from the member, the motor is brought into an idling state, and when no signal is generated from either the shaft rotation direction detection member or the buckle switch means, the motor is set to a state in which the rotation signal is applied to the motor from the first torque. The belt is rotated in the belt winding direction by applying a low second torque, and the signal from the buckle switch means and the signal from the inertial sensing device are input.
．． A safety belt retractor is provided with a control circuit that performs control such as applying a third torque higher than the second torque to rotate the motor at high speed.