JPS5911873A - Seat belt retractor for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an emergency lock type vehicle seat belt traction device (5
(eat belt retractor) I/C related.

Such traction devices typically include a belt storage device and an emergency locking mechanism, such that in use the belt is pulled out of the belt storage device against a tension force exerted by the traction device springing means. The emergency locking mechanism can be set to a predetermined belt acceleration in the direction of belt withdrawal and a predetermined acceleration of the traction device (the term acceleration is used herein to also include deceleration). The traction device is locked to prevent belt withdrawal in response to at least 5 in 10,000. Known traction devices of this type contain a large number of small parts that must operate with considerable reliability and are therefore difficult to manufacture and assemble. It is also necessary to construct the traction device to meet specific requirements, for example, the locking mechanism must respond only to belt acceleration, only to tractor acceleration, or both. Furthermore, it is necessary to have the traction device mounted in different orientations or positions in the vehicle, for example for use in the front seats or for use in the rear seats. The locking action in an emergency situation must take place reliably and quickly, i.e. without the belt being pulled out over a considerable length.

According to the present invention, the seat belt retractor for a vehicle has a frame supporting a spool member, and the seat belt is not unwound against the tensile force of the retractor spring during use. The traction device also includes a locking device for locking the spool member against rotation in the belt unwinding direction, the locking device being configured to rotate on the axis of the spool member to perform the locking action. an actuation member capable of carrying an inertial device for imparting rotational movement of the spool member on the actuation member in response to a predetermined tractor acceleration; Accordingly, there is provided a seat belt retractor for a vehicle configured to cause the rotation of the actuating member.

The inertial device may include an output member, the output member being movable in response to a predetermined acceleration.
The actuating member and the spool member are engaged with each other to couple the actuating member and the spool member to each other, thereby causing the rotation of the actuating member.

Preferably, the output member has a pivotally connected arm;
The free end portion of the arm engages with a ratchet m of the spool portion I.

Thus, rotation of the actuating member is effected by direct coupling between the actuating member and the spool member. However, the connection may be indirect, for example in the following cases: Namely 1. In that case, the traction device is adapted to respond to belt acceleration, and the traction device has an inertial mass, and the inertial mass is connected to the spool member when the rotational acceleration is lower than a predetermined rotational acceleration. the inertial device is configured to rotate together with the spool member and is configured to lag the spool member at a given rotational acceleration, thereby causing said rotation of the actuating member; It may have an output side movable to delay the inertial body relative to the spool member in response to acceleration.

Preferably, the locking device of the traction device includes a locking bar movable into engagement with a ratchet wheel portion of the spool member upon said rotation of the actuating member, said locking bar being integral with said actuating member. The engagement is effected by a formed flange, for example a plastic molded flange.

The traction device according to the invention can have fewer parts than known traction devices. Therefore, fabrication and assembly are simplified and operation is made more reliable. '$ drawer,
It can be made to respond to human retractor acceleration, or to belt acceleration only, or by adding appropriate components to both skin velocities.

Preferably, the inertial device of a tractor according to the invention comprises an inertial weight, typically supported in a stationary position on a support, which inertial weight moves the output member in response to a predetermined tractor acceleration. the support and actuating member are configured to be coupled to one another at a selected one of the plurality of positions, such that the inertial weight is movable from a rest position to It is generally possible to be supported by a support in a resting position in different orientations or positions.

Thus, the present invention provides a towing device that can be adapted to be installed in a suitable orientation for a particular vehicle by selecting the support location of the inertial weight.

Preferably, the support is adjustable about an axis transverse to the axis of the spool member.

Generally, known vehicle seat belt retractors include multiple compression or tension coil springs. This makes the assembly process cumbersome and reduces the reliability of operation, especially when changing the acceleration threshold when the traction device is locked.

In order to overcome these drawbacks, the present invention provides a vehicle seat belt retractor, which has a frame supporting a spool member, and the seat belt, when used,
The retractor can be unwound from the spool member against the tension of the spool, and the retractor can also be rotated in the direction of belt unwinding by relative movement of multiple parts of the retractor in response to predetermined conditions. and a locking device operative to lock the spool member to prevent damage, relative movement of the plurality of parts being opposed by a flexible spring member.

The flexible spring member may comprise a generally straight spring wire, or the spring member may be a part of the actuating member integrally formed with the actuating member, such as a one-piece plastic molding. It may be a department.

The relatively moving parts of the retractor may be a retractor frame and an actuating member that is rotationally movable about the axis of the spool member to actuate the locking device. Alternatively or additionally, the plurality of parts include a spool member and an inertia configured to normally rotate together with the spool member and to lag relative to the spool portion in response to a predetermined belt withdrawal acceleration. You may also be mourning a mass body.

Furthermore, the number of parts that make up the traction device is reduced,
In order to improve operational reliability and facilitate assembly, the present invention provides a vehicle seat belt with a frame for supporting a spool member,
The belt may be unwound from its spool member against the tension of the retractor spring, the retractor also having a locking device operative to lock the spool member against rotation in the direction of belt unwinding. The locking device includes an inertial mass that is normally rotatable together with the spool member and configured to be delayed at a predetermined belt unwinding acceleration, and a pivot on one of the inertial mass and the spool member. a latch lock having a toothed portion and a cooperating structure disposed on the other of the inertial mass and the spool member and on the latch lock, the latch lock having a tooth portion; The operative structure pivots the latch lock outwardly to engage the toothed portions of the latch lock with the ratchet teeth surrounding the latch lock when the inertial mass lags with respect to the spool member. Thereby, a vehicle seat belt traction device for activating a locking device is obtained. Preferably, one end of the latch lock is pivotally mounted and the other end of the latch lock is provided with a toothed portion, the cooperating structure being one of the inertial mass and the spool member. and the latch lock.

This retractor locking device has fewer parts than known retractors, thereby simplifying the retractor mechanism.

Preferably, the latch lock is pivotally connected to the pivot pin of the spool member, and the proof mass includes a flexible member carried by the proof mass and engaged with the pivot pin. It is driven by the spool section side via the spring member. Preferably, the flexible spring member comprises a generally straight wire having an end secured to the inertial mass.

The features of the invention described above can, of course, be used in any desired combination in the vehicle seat belt traction device according to the invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The vehicle seat belt retractor shown in FIGS. 1 to 5 has a housing comprising a cover part 1 and a side wall part, preferably all molded from a suitable plastics material. It has 2°3. The cover member 1 does not include the curved outer wall portion 4. These two side wall portions are spaced inward from both side edges of the cover member 10, respectively.

Each of these side wall sections is also provided with an integral pusher 6, the inner end of which is provided with an outwardly bent lip 8.

The rigid frame 10 has two side webs 12.
The lateral webs 12 have central webs 11 connecting them to each other, the lateral webs 12 having holes 14 which are shaped to match the shape of the side wall portions of the cover part 1 and are aligned with each other. Let's do it. Since the cover member 1 is an elastic body, the frame 10 and the cover member 1 can be assembled together by housing the bushing 6 in the hole 14 provided in the side web 12 of the frame 10. K, and when assembled, the outer surface of the lip 8 is aligned with the side web 1.
It engages with the inner surface of 2. At this time, the hole 15 provided in the cover member 1 and the central web 1 of the frame 10 are
Holes 16 in 1 are aligned with each other and adapted to receive locking bolts (not shown) by which the towing device can be attached to a vehicle.

The assembly of the cover member 1 and the frame 10 is as follows.
A spool 20 is supported inside. The spool 20 has an integrally molded tongue and groove, for example by die-casting, and the spool 20 has a spindle portion 2 with an axial slot.
1, the spindle part 21 has a small diameter axially slotted short shaft 22 at one end thereof and a large diameter ratchet wheel part 24 with ratchet teeth at the other end. . The ratchet wheel portion 24 has a small diameter shaft 26 projecting axially outward.

The spool 20 is installed into the frame 1 by being moved axially through the bushing 6 until the ratchet wheel portion 24 engages the lip 8. The spool 20 is also held in the assembled position by a circlip 28 that engages a groove in the spindle portion 21 against the inner surface of the side web 12 adjacent the ratchet wheel portion 24. ing.

Side wall member 2 of the housing and cover member 1 adjacent thereto
A retractor spring 30 is housed between the retractor spring 30 and the retractor spring 30, the inner end of which is received in a slot provided in the short shaft 22; The outer end of the spring 30 is provided with a cutout, which cooperates with a cooperating feature in the side wall part 2 to retain the retractor spring 30. Both side wall members 2
3 is assembled together with the cover member 1 by accommodating the protruding tongue 32 in a slot 34 provided in the curved wall portion 4, and the assembly improves the elasticity of the various parts of the no-woo song. It is supposed to be done by using it. The side wall member 2 with a built-in spring 3o can be brought into an assembled state by screwing a screw 31 that is passed through the side wall member into a tapped recess provided in the cover member 1. Fixed. By pushing the belt through a guide slot (not shown) provided in the cover part 1 into an axial slot provided in the spindle part 21 and holding the belt with a strap 35, the belt t It can be incorporated into the spool 20.

In the space between the illustrated cover side wall portion 5 and the side wall portion 3, there is provided an inertial sensing mechanism for sensing vehicle acceleration and belt speed, and a spool 20 in response to the sensing mechanism.
A locking mechanism for locking the belt against rotation relative to the frame 10 in the unwinding direction of the belt is housed therein.

The locking mechanism has a ratchet wheel portion and an actuating member in the form of a locking cup 40 with internal ratchet teeth 41 and a hole in the center of the bottom of the locking cup 40 to allow the short shaft 26 to It is designed to be supported in a free rotation state. Projecting laterally from the edge of the locking cup 40 is an arm 42 having a cam slot 43 for co-operating with a stopper 44 projecting from the locking member 45. Locker 45 has toothed portions 48 that are engageable with teeth 25 of susol lattet wheel portion 24 to prevent rotation of spool 20 in the direction of belt rewind. The locking member 45 has a shaft portion 49 between the tooth portion 48 and the stop portion 50. During assembly, the stop portion 50 is received all the way through the end of the hole 51 provided in the frame side web 12 adjacent the ratchet wheel portion 24, and the shaft portion 49 is then captured within the narrow portion of the hole 51. Can be set.

A spring 52 disposed about the minor axis 26 has one end acting on the frame 10 and the other end acting on the locking cup 40 so that the pin 44 is disposed as shown in solid lines in FIG. The lock cup 4o is pressed to an angular position located at one end of the slot 43Q). At this time, the tooth portion 48 of the locking parr 45 is spaced apart from the bellows 25. When the lock cup 4o is rotated counterclockwise in FIG. 4 against the force of the spring 52, the pin 44 is moved to the other end of the slot 43, that is, to the position shown by the dashed line in FIG. The locking member 45 is rotated so that the tooth portion 48 engages the tooth 24.

The belt acceleration responsive inertial sensing device is a lock cup 40.
and the ratchet wheel portion 24.

This inertial sensing device has an inertial mass in the form of a disc 55 with a hole in the middle and supported on the short shaft 26.

The disc 55 is connected to the short shaft 26 by an elongated calibration spring 56 formed from a length of wire OT flexible spring member and provided with a transverse It is received in the direction hole. Spring side 5
6 engages the disc 50 by means of two lugs 58 provided on the outer surface of the disc 50 diametrically opposite each other. Thus, the disk 50 has a calibration spring 5
6 and can rotate within a limited range relative to the short axis 26.

The belt acceleration responsive inertial sensing device also includes a latch lock 60 in the form of a lever with two arms bent at generally right angles.

The free end of one arm is formed as a tooth 61 for engaging with the In ratchet tooth 41 of the lock cup 40, and the free end of the other arm is provided with a hole 62 for receiving the short shaft 26. It's marked K so you can enter. A hole 64 is provided at the joining portion of the two arms, and the lunch lock 0 is pivotally supported by the hole 64 in a pin 65 projecting from the outer surface of the ratchet wheel portion 24 in the axial force direction. ing. Mounting the launch lock 60 in this manner ensures proper phasing of the internal sensing and locking mechanisms. The bore 62 is elongated to allow tilting of the launch lock around the bin 65 and is surrounded by a protruding rim 66 which provides a bearing surface for the disc 55. 7 to reduce friction and noise. As shown in Figure 5,
A camming surface 53 provided by a recess formed at the inner periphery of the disc 55 acts on a follower surface 63 of the latch lock 0, causing a launch when the disc 55 rotates behind the latch wheel 24. Lock 60 is pivoted outwardly about pin 65 into engagement with internal ratchet teeth 41.

In the illustrated traction device variant, the launch lock 6
0 is pivotally mounted on the disc 55 and also defines a cam follower surface that acts on a cam surface formed on the ratchet wheel portion 24.

When the belt is unloaded from the spool at normal speed, the spool rotates slowly enough to maintain a constant PJf angular relationship of the disc 55 to the spool, so that the plane of the disc and the launch lock 60 are Teeth 61 of the launch lock are placed in spaced relationship with internal ratchet teeth 41 of lock cup 4°. however,
When the belt is withdrawn at very high speeds, as is experienced at non-zero times when the belt must keep the user seated, the resulting rotational speed of the spool is such that the disc 55 is unable to keep up with the rotation of the spool, and rotates at such a speed that it lags on the spool against the force of the calibration spring 56. At that time, the cam surface 53 immediately moves the launch lock tooth portion 61 onto the lock cup 4, which was previously held stationary on the spool by the spring 52.
The internal 2fs-ent teeth 41 of the o are engaged with each other. In this way, the lock cup 40 is connected to the rotating spool via the latch lock 0, and as a result, the lock cup 40 itself rotates and the toothed portion 4 of the lock par 45
8 to the teeth of the ratchet wheel portion 24 of the spool, and the frame K is engaged to prevent further rotation of the spool.
Ia is determined. When this acceleration is finished, the spring 52
acts to return lock cup 40 and lock par 45 to their normal inoperative position, while still returning spring 56 to disk 55 to its original angular position with respect to the spool so that normal operation can be resumed. It looks like this.

The locking cup and belt acceleration sensing mechanism is retained on the short shaft 26 by a small circlip contained within a groove provided adjacent the end of the short shaft 26.

The locking mechanism of the illustrated towing device is designed to prevent acceleration of the towing device beyond a predetermined lid, i.e. zero force of the vehicle on which the towing device is equipped.
It also responds to speed.

The locking mechanism has a tractor acceleration sensing device, the sensing device having a support 70 on which the canno γ1 containing the upright bin 12 is placed; A junior high school inertia weight 14 is placed on the upper end of the upright bin 12. Attached to the support 10 is a second lever 15 pivotable Vc1e, which rests on an inertial weight 74 between its pivoting part and a toothed free end 76. ing.

The support 70 is fastened to the arm 42 of the locking cup by a slot 77 which is located in the arm, and when the inertial weight γ4 is tilted in response to a predetermined acceleration of the retractor, the lever 75 is pivoted. , the toothed free end 76 engages the teeth 25 of the ratchet wheel portion 24 through holes γ8 provided in the Ronkkamp 400 cylindrical peripheral wall portion. At this time, the reel or spool is rotating. This is because the annual interest rate accelerating force acting on the inertial weight 14]K
This is because the belt wearer is not allowed to move forward in the seat and the bow 1 is taken out from the reel. The locking cup 40 is therefore caused to rotate together with the reel by the coupling action produced by the lever 15.

This Ronkkamp 400 movement d-1, as well as the rotation of the lock cup caused when it is coupled to the reel by the launch lock 60, locks the retractor from pulling out the belt.

This traction participation speed sensing device operates independently of the belt acceleration sensing device, and the illustrated traction device can detect only belt acceleration, only tractor acceleration, or both accelerations by selecting appropriate components. can be easily assembled to operate in response to

If desired, the traction device can be easily modified so that the traction speed sensing device operates via the belt force speed sensing device rather than separately. In this case, disk 55
can be provided with external ratchet teeth, and the lever 75 can be configured to engage the toothed free end 76 with the ratchet teeth, thus retarding the movement of the disc from rotating with the spool and The locking action is performed in the same manner as when the spool lags behind the spool due to its own inertia.

A second embodiment of the tractor, not shown in FIG. and a ratchet wheel fixedly attached to the wheel portion 124 or the spool. A locking par 145 is pivotally mounted in a hole provided in the side web of the frame, the locking par 145 being integral with or attached to the spool of the second ratchet wheel portion 1.
an actuated position in which it engages with 25 to prevent withdrawal of the belt;
The lockper is connected to its second ratchet wheel portion 12.
5 and a normal position spaced apart from the normal position. Locker 145 is the spool extension 1
The locking cup 140 is actuated by a locking cup 140 rotatably carried by the locking member 26 and having a radially outwardly projecting arm 142.
45 extensions are housed between the arms 1420. Lock cup 140 also has a lower protrusion 141 within which is housed an inertial sensing device responsive to tractor acceleration. This sensing device has a tilting weight assembly similar to the assemblies 71, 72, 74 shown in FIG. When the weight assembly is tilted in response to a predetermined acceleration of the retractor, the lever 115, which is pivotally mounted outside the extension of the locking cup, pivots, causing the lever 175 in the form of teeth 176 to pivot. The free end is adapted to engage teeth on a ratchet wheel portion 124 within the lock cup.

As soon as the lever 175 engages the teeth of the ratent portion 124, the locking cup 140 is coupled to the spool, and rotation of the spool in the (counterclockwise) belt rewinding direction causes the locking cup to similarly move and its As a result, the locking member 145 is moved from the release position to the engagement position. This movement of the lock cup 140 is caused by the movement of the frame 110 and the radially protruding portion 111 of the lock cup.
is opposed by a return spring 152 extending between.

It will be appreciated that the retractor of FIG. 6 is responsive only to retractor acceleration. However, Rock Cup 1
40, in addition to the ratchet wheel portion 124, the first
A belt acceleration sensing device may be accommodated which may correspond to that shown in FIGS. Variants are also conceivable in which the traction device is rotated by an acceleration sensing device or the lever 115 engages with teeth provided on the inertial disk 55 so that the tractor acceleration sensing device is actuated via the belt acceleration sensing device.

The retractor shown in FIG. 7 has a cover member 201 and a rigid metal frame 210. These parts are generally similar to the cover 1 and frame 10 of the traction device shown in FIGS. 1-5. Therefore, the cover 201 and frame 210 will not be described in detail. In addition, parts and parts corresponding to parts and parts of the cover 1 and frame 100 of the traction device shown in Figs. 1 to 5 are designated by the corresponding numbers in Figs. 1 to 5 plus 200 in Fig. 7. It is shown. In FIG. 7, the side wall members of the tractor and the tractor spring are omitted.

The illustrated retractor has a spool 220 that includes an axial slot in the spool 220 of the spool 220.
21 and a short shaft 222 with a small diameter axial slot for receiving the retractor spring. Spool assembly 22
A ratchet wheel 224 having ratchet teeth 225 is integrally formed at the opposite end of the ratchet.

A cylindrical wall 230 having coaxial edges is integrally provided on the outer end surface of the ratchet wheel 224 or is attached separately, and ratchet teeth 231 are provided on the outer surface of the cylindrical wall 230. .

The short axis 226 of the spool assembly 220, which projects beyond the ratchet wheel 224, carries a locking cup 240 secured for free rotation on its short axis 226 by a screw 268, and the cylindrical wall 230 is locked. Cup 2400 is located radially outward of the cylindrical wall.

Unlike locking cup 40 of the retractor of FIGS. 1-5, locking cup 240 has a cam 243 on its laterally disposed arm 242. That cam m243
The vi lockper 246 is in contact with the follower surface 244 of the vi lockper 246, which is attached to one side of the frame 210.
Itlj is pivotally mounted to a pivot pin 249 through a hole formed through the wall 212.

The locking force horn 240 is connected to the tooth portion 24 of the locking parr 245.
8 is separated from the ratchet m225,
The spring 252 is biased by a straight, frangible return spring 252 formed from a length of wire and having one end secured to the exterior surface of the lock cup 240 and the other end secured to the frame 210. are doing.

The lock cup 240 has an arm 242 projecting laterally.
are integrally formed, and the arm 242 supports a vehicle acceleration sensing device, which includes a cup 271, an upright bottle 212, and a hollow inertial weight 274.
It has The acceleration sensing device also includes lever 275.
The lever 275 rests on the bin 272 and has a toothed end (not shown) that pivots on the arm 242, and the toothed end has a cylindrical shape. Ratchets on wall 230 can be engaged with teeth 231.

Lock cup 240 has an internal ratchet, )1411724
1 and houses a belt acceleration responsive inertial sensing clamp, the sensing device comprising an inertial mass 255, a latch lock 260 seeded on the outer surface of the ratchet wheel 224, and a belt acceleration responsive inertial sensing clamp. It has other parts corresponding to those of the traction device shown in FIG. latch lock 26
0 is for spool! Movement away from the 1qil line acts to engage the internal ratchet teeth of the lock cup.

The belt acceleration sensing device of the traction device shown in FIG. 7 is similar to that of the traction device shown in FIGS.
is coupled to the lock cup 240. In this way, when receiving emergency acceleration, the lock cup z4θ rotates together with the spool 220, and the follower of the lock cup 245
A cam surround 243 formed on the support arm 242 in contact with the lock bar 244 causes the lock bar to rotate and cause the lock bar tooth portion 248 to engage the ratchet teeth 225 of the ratchet wheel 224.

[When the first speed is completed, the lock cup 240 is under the action of the return spring 252, and the meat part 248 is pressed against the ratchet tooth 2.
25 to the unengaged angular position.

Tractor acceleration sensing assembly 211.272.214.27
5, the bin 27 is caused by tractor acceleration exceeding a predetermined amount.
2 is moved about 1 to actuate lever 275, except that when lever 275 is actuated, the toothed end of lever 275 engages ratchet teeth 231 on cylindrical wall 230 to couple locking force horn 240 to spool 220. 4. Sensing assembly 71, 72, 74, 15, 16 of FIGS.
It works the same way.

In another variation l+1, the charcoal spring 252 can be molded integrally with the lock cup 240.

8 to 9 show a spool member 320, a lock cup 3401, an inertial mass body 355, and other parts constituting a vehicle seat belt traction device according to a fourth embodiment of the present invention. . For the sake of clarity, the parts comprising the nail-containing tool such as the frame, cover and traction spring are not shown in FIGS. 8-10. These and other parts not shown are co-workers of the corresponding parts shown in FIGS. 1-6.

The spool member 320 has a spindle portion 321 to which a seat belt is fixed. The spool member 320 is P! 32 carrying a ratchet wheel 324 having a
A locking member 345 (FIG. 9) is engaged with the spool portion 4 to lock the spool portion 320 to the tractor frame.

The end of the spool member 320 protruding beyond the ratchet wheel 324 has a center short 1 pongee 326 and a short shaft 3
Is it related to 1llI with 26? A circular cylindrical wall 330 is formed, and the d-bottom cylindrical wall 330 has ratchet teeth 331 on the outside +Mi. Within the cylindrical wall 330,
The stool member 320 includes a bin 380 and a circular recess 382.
is formed, the bin 380 extends parallel to the axis of the shaft portion 321, and the circular recess 382 is formed in the bin 380.
It is spaced M apart from the center in the circumferential direction. Another circular recess 384 is provided in concentric relationship around the minor axis 326.

The latch lock 360 is molded from a plastic material and has a hole 380 at one end of the latch lock 360.
A hole 386 receives the large diameter base of the bin 380 and mounts the latch lock 360 for pivotal movement relative to the circular ends of the ratchet wheel 324.

The opposite end of the latch lock 3600 is formed as a pawl portion 388, which pawl portion 38B is connected to the latch lock 360.
One end of the integral pin portion 390 is disposed within the recess 382 . The cylindrical wall of recess 382 abuts bin 390 to limit pivotal movement of latch lock 360 about bin 380.

The inertial component 355 has a central opening 392 having a diameter larger than the outer diameter of the short axis 326 of the spool member 320.

The mass 355 has a groove 394 extending inwardly from the circumferential surface of the mass 355 and receiving the other end of the integral pin 3900 of the latch lock 360. As the mass 355 rotates relative to the spool member 320, the walls of the bin 390 and groove 394 cooperate with each other in accordance with the direction of their relative rotation.
is moved toward and away from the axis of the stool member 320. The relative rotation of inertial mass 355 and ratchet wheel 324 in a direction that causes outward movement of pawl portion 388 is in the form of a spring wire. J is opposed by a flexible spring member 400, and the spring portion 400 is connected to a hole 404 provided in the mass body 355.
A short bent end 402 resting within the spool member 320 and a straight portion 406 that abuts the bottle 380 of the spool member 320 are M, and a hook 408 provided on the mass body 355 receives the bottle 380.

The short end 326 of the spool member 320 carries a locking cup 7° 340 which is an integral plastic molding and has a central boss 409 received within the recess 384. The boss 409 has a hole in the center to receive the short shaft 326 and has a cylindrical outer surface such that the mass 355 rotates around the cylindrical outer surface. ing. Lock cup 340 is secured to spool member 320 by a screw (not shown) received at the end of short shaft 326.

Lock cup 73400 cylindrical wall 410 is stool member 32
The latch lock 360 has internal ratchet teeth located radially inwardly of the cylindrical wall 330 and engaged by the pawl portion 38B of the latch lock 360 during outward movement of the latch lock.

In this way, an angle in the direction of versit unwinding equal to or greater than the acceleration threshold defined by the biasing or spring force of the flexible spring member 400, 0I
The locking cup 340 is locked to the stool member 320 unless the spool member 320KI is used manually.

Arm 41 protruding laterally of lock cup 340
2 is the inertia device 71, 72 of the traction device of FIGS. 1 to 6;
．． It also has an inertial device 414 similar to 74. Movement of the inertial force 416 of the inertial device caused by acceleration or deceleration beyond the threshold causes the bottle to pivot the pawl member 420 so that the pawl member 420 engages the external ratchet teeth 331 of the cylindrical wall 330. to engage. This acceleration or deceleration causes lock cup 340 to become locked to spool member 320, which rotates together with spool member 320 in the belt rewinding direction.

Locking cup 340 includes an integral biasing member in the form of a flexible tongue 440 . Its tongue 4
The outer end of 40 is connected to a stop (
(not shown) and biases the lock cup 340 to prevent rotational movement in a direction that would cause the spool member 320 to lock against the device frame;
In other words, it is energized. This locking action is achieved by a locking parr 345 (similar to the locking parr 45 shown in FIG. 6).
Figure 9). The locker 345 has a pawl portion 34B that engages a portion 325 of the ratchet wheel 324 to hold the spool member 320 against the frame as the locker pivots relative to the tractor frame. Fix it. The lockper 345 is inserted into the lockcup 345 by receiving a protruding tab 422 provided on the lockper into a hole 424 formed as part of the integral lockcup molding.
40. The hole 424 is connected to another integral spring member 42 that is molded with the rest of the lock cup.
t3, and the spring member 426 presses the tab 422 against the inner wall of the hole 424.

The inertial device 414 is attached to the arm 41 by a seat 428 that determines the orientation of the inertial device relative to the retractor frame.
It is installed on 2. The arm 412 and the seat 428 are snapped together, and the arm 41
2 is shaped so that the seat can be brought into alignment with the arm at a selected relative position of two or more relative positions 4 between the arm and the seat.

This avoids the use of separate screws or other fastening elements, and also allows the towr to be installed in one of two or more orientation positions, such as on the left or right side of the vehicle, or forward or towards the rear. It is designed to be used in one selected orientation position.

In the embodiment of FIGS. 8-10, the seat 428 is articulated at one end of the axis extending transversely to the axis of the spool member 320. In the embodiment of FIGS. In a particular example of this embodiment, the rest position of the inertial device 414 is
The longitudinal axis of the bin of the inertial device is located at the spool portion (third
It can be chosen to lie along one of two lines located in a plane containing the 20 axes. In the two positions, the longitudinal axis of the bottle forms an angle of 15° with respect to both sides of the bottle, which are located within the front curvature and extend at right angles to the axis of the spool member 320. There is. In other embodiments of the invention, other orientation angles and orientation planes of the inertial device may also be used, so that the seat for the inertial device can be adjusted at different axes (III). ) can also be used.

The claw member 420 is molded from plastic material,
A circular hole 430 provided in the leg of the cut U-shaped part
It is pivotally mounted to arm 412 by receiving corresponding cylindrical projections 432, one on each side of arm 412. Pawl portion 348 of pawl member 420 is engageable with ratchet teeth 331.

The pawl member 420 is connected to the inertial weight 416 by a cup portion 436 that houses the bin of the inertial device it 414. The pawl member 420 is shaped so that the cup portion 436 is offset from the pawl portion 348 by an angle appropriate for the orientation in which the retractor is to be used;
In the event that it is desired to change the orientation in which the retractor is to be used, pawl member 420 is adapted to be easily removed from arm 412 for replacement with an alternate pawl member having a different offset angle. .

The belt acceleration sensing locking mechanism of the traction device shown in FIGS. 8 to 10 has a first leak similar to that of the traction device shown in FIG. Upon occurrence of a belt/JD speed above a threshold in the rewind direction, the latch lock 360 engages the internal ratchet teeth of the lock cup 3400, thus reducing the locking force horn 340.
rotates together with spool tfAl'320. This rotation pivots the locker 345 so that the pawl portion 348 of the locker engages the teeth 325 of the ratchet wheel 324 to lock the spool part to the tractor frame. When the caro speed ceases, the locking cup is forced back into a position where the ratchet wheel 324 is free to rotate under the action of the resilient tongue 420.

Military Weapon Mouth Speed R&%D Flow 2 mechanism is the same as the one mentioned above, and is for swimmers. When the inertia weight 416 tilts under the influence of JJU strayness or deceleration that is higher than the threshold value, the pawl portion 348 of the pawl member 420 ratchets hm331.
The lock cup 340 is rotated together with the spool member 320.

The locking action of the spool member 320 relative to the retractor frame as described above is then produced.

Similar to the embodiments described above, the traction device acceleration sensing inertial device slows the rotation of the inertial mass of the belt acceleration sensing device and operates via the belt acceleration sensing device to perform the locking action of the traction device. The retractor of FIGS. 8-10 can be modified and modified.

Another variation is to have the latch lock 360 pivoted to the inertial mass, and the latch lock itself and the spool member 32
The ratchet 360 can be moved into a position where it engages the ratchet teeth of the locking cup 340 by the action of cooperating structures, such as pins and grooves, grooves, or camming structures, provided on the lock cup 340. You can do it like this.

[Brief explanation of drawings]

1, 2 and 6 are exploded perspective views of a traction device according to a tenth example of the present invention, and FIGS.
6 is a partial view showing a part of the retractor shown in FIGS. FIG. 8 is an exploded perspective view showing a part of the retractor according to the fourth embodiment of the present invention, and FIG. 9 is an exploded perspective view of a retractor according to the fourth embodiment of the present invention. FIG. 10 is a side view showing the assembled state of the tractor parts shown in FIG.
It is a partial Kr side view along the scarlet line. 1... Cover member, 2, 3... Side wall member, 4...
Outer wall part, 5... Side wall part, 6... Bush, 8.
... Lip, 10... Frame, 11... Central web, 12... Side web, 14. 15... Hole, 20...
...Spool, 21...Spindle part, 22...
Short shaft, 24... Ratchet wheel part, 25...
Teeth, 26・Short axis, 28...-Circlip, 30...
Spring, 31... Screw, 32 Projecting tongue, 34... Slot, 35... Band-shaped bottle, 40... Lock cup, 41...
・Internal ratchet teeth, 42 arms, 43 cam slots,
ヰ4 ・Follower Pino, 45...Rock Bar, 48・
...Tooth part, 49...Shaft part, 50...Stop part,
51...hole, 52...spring, 53...cam quotient, 5
5... Disk, 56... Calibration spring, 5B... Lug, 60... Latch lock, 61... 1fi, 62...
...hole, 63...follower, 64...hole, 65...
Bottle, 66... Rim, 70... Support, 71...
Cup, 12... Bottle, 74... Inertia weight, 75
... Lever, 76 ... Toothed free end, 77 ... Slot, 78 ... Hole, 110 ... Frame, 111 ... Projection part, 124 ... Ratchet wheel part, 125
...Second ratchet tooth)"ja minute, 140.
-Lock cup, 141...Protrusion, 142...Arm, 145...Lock bar, 152...Return: 0
．． 175...Lever, 176...Teeth, 201...Part of the cover) 210...Frame, 212...1+ll
I wall, 220... Sphere, 221... Spindle part, 222... Short shaft, 224... Ratchet wheel, 225. Ratchet tooth, 226 Short shaft, 228...
... Screw, 230 ... Cylindrical wall, 231 ... Ratchet +1.240 ... Lock cup, 241 ... Ratchet 245 ... Lock bar, 24B ... Teeth part, 249
...Pivot pin, 252...Return spring, 258i...
Inertial mass body, 2so-latch lock, 271...-cup, 272... upright bottle, 274... resistance weight, 275... lever, 320... spool member, 3
21... Spindle part, 324... Ratchet wheel, 325... Teeth, 326... Short shaft, 330...
Circle l@Wall, 331...Ratchet teeth, 340...Lock cup 1, (4b・Lock bar~, :(48・Claw part, 3 pieces 5...Infusion body donation, 360...Latch lock, 380・Bottle, 382.384...Circular recess, 3
86...hole, 3B+3, claw part, 390...bottle part,
392...Central plane 1'', 394...(Rui, 400...
Spring part side, 402-bent end, 404... hole, 406...
・・Straight line part, 408・Groove, 409・・Boss, 410・Cylindrical wall, 412・Arm, 414・1 piece 1 production device, 41G
...1 piece '1 raw 16 mori, 420...claw side, 42
2.Tab, 424...hole, 426.spring member, 428.
・Layer seat body, 430 Circular hole, 432 ・Cylindrical projection, 43
6 Cup part, Procedural amendment (method) August 10, 1980, Commissioner of the Japan Patent Office 1, Indication of the case 1982 Patent Application No. 69892 3, Relationship with the person making the amendment 1! 1 Patent 4r1 application Address: 4, Agent: 5, Amendment Order: 1 q.

Claims (1)

[Scope of Claims] fl) A seat belt retractor for a vehicle, comprising a frame supporting a spool member, and when the seat belt is used, the seat belt pulls the spool member against the tensile force of a retractor spring. The traction device further includes a locking device for locking the spool member against rotation in the belt unwinding direction, the locking device being configured to prevent the spool member from rotating in the belt unwinding direction. an actuating member which is rotatable at a locking position and carries an inertial device which causes the actuating member to flex in response to a predetermined tractor acceleration. M.L.
A vehicular seat belt traction device in which the rotation of the actuating member is effected by applying a rotational movement of the Sgurgle member. (2. In the vehicular seat belt retractor described in claim 1, the inertial device d has an inertial weight, and the inertial weight is supported at a normally resting position on a support. and moving the output member in response to the predetermined tractor acceleration) from the rest position, the support and the actuating member being in a selected one of a plurality of positions. a seat belt retractor for a vehicle, wherein the inertial weight or the frame is configured to be connected to each other at a plurality of different orientation positions and supported by the support in a normally rest position. . (3) The vehicle seat belt traction device according to claim 2, wherein the support body is adjustable around a shaft in a direction transverse to the axis of the spool 8B material. . (4) Self-actuating part for performing a locking function in the vehicle seat belt tensioner described in any one of paragraphs 1 to 6 of the scope of % meter reading. The rotation of the actuating member is caused by the engagement of the integrally shaped portion of the actuating member with the frame.
' 1iE is competing with vehicle seat belts. (5) % Allowance In the vehicle seat belt traction device according to any one of claims 1 to 4,
The locking device includes a locking bar, the locking bar being movable by the rotation of the actuating member into engagement with a ratchet wheel portion of the spool member, the locking bar being an integral part of the actuating member. A vehicle seat belt traction device which is engaged by a portion formed with a (6) In the vehicle seat belt traction device according to any one of claims 1 to 5,
The inertial device has an output member that moves in response to the predetermined acceleration to engage the spool member, thereby coupling the actuating member and the spool member together. A vehicular seat belt traction device for causing said rotation of said actuating member. (7)%, Scope of Permissible Requirements In the vehicle seat belt retractor according to item 6, the output member has an arm, and the arm has a free end provided on the spool member. vehicular seatbelt which is pivotally mounted to engage the ratchet teeth of the seatbelt). (8) % Allowance In the vehicle seat belt traction device according to any one of claims 1 to 5,
an inertia configured to rotate with the spool member below a predetermined rotational acceleration of the spool member and cause the rotation of the actuating member to occur with a delay relative to the spool member at the predetermined rotational acceleration; A mass is provided, the inertial device having an output member movable in response to the predetermined tractor acceleration and configured to move forward 1U02 relative to the spool member.
Receiver 5ji, vehicle seat bell l pulli that slows down the body. (9) In the vehicle seat belt retractor according to claim 8, a latch lock is pivotally attached to one of the spool part restraint and the inertial mass body bjJ,
The latch lock has a protrusion received in a groove in the other of the spool member and the inertial mass so that the engagement between the protrusion and the groove upon delay of the inertial mass is Due to the cooperative action, the latch lock pivots outwardly to engage the ratchet l on the actuating member.
A vehicular seat belt traction device that engages with the actuating member to cause the rotation of the actuating member. 00) In the vehicle seat belt traction device according to claim 8 or 9, the inertial mass body and Mi
+ vehicle seat belt provided with a generally straight flywire acting between the self-sustaining members to maintain a normal angular relationship between them;
Guilt. (11) A seat belt retractor for a vehicle has a frame supporting a spool member, and when the seat belt is used, the seat belt is unwound from the spool member against the tensile force of the retractor spring. The retractor may also include a locking device operable to lock the spool member from rotation in a belt rewind direction due to relative movement of parts of the retractor in response to predetermined conditions. A vehicular seat belt traction device, wherein relative movement of the plurality of parts is opposed by a flexible spring member. α2, In the vehicle seat belt retractor according to claim 11, the plurality of relatively moving parts are rotatably moved around the axis of the retractor frame and the spool member to actuate the locking device. A vehicular seat belt traction device having an actuating member. 03) Seatbelt traction device for offshore vehicles according to claim 12, wherein the flexible spring member is constituted by an integrally formed part of the actuating member. . 04) The vehicle seat belt retractor according to claim 12, wherein the flexible spring member has a generally MW-shaped wire carried by the actuating member. . (15) In the vehicle seat belt traction device according to any one of claims 12 to 14, the plurality of relatively moving parts are the #-marked susol member and the #-marked susol member. 061% 16. The vehicle seat belt retractor according to claim 15, wherein the flexible spring member has a straight wire extending generally in a diametrical direction of the inertial mass body. Q71 In the vehicle seat belt traction device according to claim 15, a latch lock is pivotally connected to one of the spool member and the inertial weight body of No. 611, The latch lock is activated when the inertial mass is delayed.
for a vehicle, wherein the inertial mass body and the spool member are cammed outwardly to engage internal ratchet teeth of the actuating member to effect the relative rotation of the actuating member; Seat belt e-device. α Enoki This is a seat belt retractor for vehicles, and has a frame that supports a spool member, and when in use, the belt is unwound from the aforementioned bissol member against the tensile force of the retractor spring. The traction device may also include a locking device operable to lock the spool member against rotation in the belt unwinding direction, the locking device being normally attached to the spool member. an inertial mass rotatable to and configured to delay relative to the spool member in response to a predetermined belt rewind acceleration; and an inertial mass supported by one of the inertial mass and the spool member; a latch lock having locking teeth and a cooperating structure disposed on the other of the inertial mass and the spool member and the latch lock; Cooperative structure pivots the latch lock outwardly to engage the toothed portion of the latch lock with ratchet teeth surrounding the latch lock as the inertial mass lags with respect to the spool member. A vehicular seat belt traction device for activating the locking device. 09) Permissible scope of claim 18 In the vehicle seat belt retractor according to claim 18, one end of the latch lock is pivotally connected, and the other end of the latch lock is provided with a toothed portion, and A vehicle seat belt retractor wherein the cooperating structure includes bin and groove means operative between one of the inertial mass and the spool member and the latch lock. (2. In the vehicle seat belt traction device according to any one of claims 17 to 19,
The latch lock is pivotally attached to a pivot pin of the spool member, and the inertial mass includes a flexible spring member carried by the inertial mass and engaged with the pivot pin. A vehicle seat belt traction device that is driven by the spool member via the spool member. 0υ In the ridged vehicular seat belt retractor of claim 20, the flexible spring part has an end fixed to the inertial mass.
A vehicle seat belt traction device consisting of a shaped wire. (24%) In the vehicle seat belt retractor according to any one of claims 18 to 21, the ratchet teeth are rotatable against the biasing force of a spring. A seat belt retractor for a vehicle, which is an internal tooth of an actuating member that engages a lock bar with ratchet teeth of the spool member. (2. Claims 12 to 17 and 21
A vehicle seat belt retractor according to any one of the preceding paragraphs, wherein the actuating member carries an inertial device that causes the rotation of the actuating member in response to a predetermined retractor acceleration. seat belt traction device.