KR20140112627A - Retractor for seat belt being able to check installation of child seat - Google Patents

Abstract

The present invention relates to a seat belt retractor capable of checking whether an infant seat is mounted or not. The seat belt retractor includes a spool where webbing is wound therearound; a frame where the spool is rotatably coupled and which accommodates the webbing wound around the spool; a flywheel gear which includes a driving gear on the same shaft as a rotary shaft of the spool at the center and unidirectional teeth formed along the outer circumferential surface, and which is mounted at an end of the spool to be rotated together with the spool; a lever which allows the webbing to be pulled in but not to be pulled out, by being caught with the unidirectional teeth when the webbing is pulled out to a predetermined first length, and which allows the webbing to be pulled in and to be pulled out, by separating from the unidirectional teeth when the webbing is pulled out, pulled in, and then pulled out again to a predetermined second length; an integrated plate which has a follower gear interlocked with a driving gear of the flywheel to be rotated together with the spool and the flywheel gear, and a first plate adjusting the lever based on the pulled out length of the webbing; and a sensing unit which checks whether or not the lever is adjusted with a sensor adjacent to the lever when the lever is adjusted by the first plate, to check whether an infant seat is mounted or not.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a retractor for a seat belt,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a retractor for a seat belt capable of confirming whether or not a child seat is attached, and more particularly, to a retractor for a seat belt capable of confirming whether or not an infant seat is mounted by confirming the operation of an automatic locking retractor .

Generally, various safeguards are provided in the vehicle or mechanism to protect the occupant so that the occupant can be prevented from leaving the vehicle or the apparatus by collision with the vehicle or with other objects.

Among them, a seat belt and an air bag are typical examples. More specifically, the seat belt protects the passenger by stably fixing the abdomen and chest of the person aboard the vehicle or apparatus to the seat The airbag is a safety device for protecting the occupant by playing the role of generating a balloon capable of buffering the shock in front of a person aboard the vehicle or the apparatus.

Although the seat belt and the airbag can protect the occupant from a collision with a certain vehicle or another object only by this basic role, such a basic role is often insufficient when the infant seat is mounted for the infant .

That is, when the infant sheet is mounted, there is a possibility that the infant sheet is separated from the seat belt due to collision with the vehicle or other object in the structure of the infant sheet, thereby further improving safety of the infant on the infant sheet. When the airbag is in operation, the volume of the balloon may interfere with the breathing of the infant and may further jeopardize the safety of the infant on the infant seat.

Accordingly, various techniques for compensating for such deficiencies have been developed. Typically, a seat belt is a retractor technique, and an air bag is a technology for detecting a baby seat.

That is, an automatic locking retractor (ALR) function is added to the retractor mounted on the seat belt, and a sensing function capable of detecting whether or not the infant seat is mounted on the airbag module for controlling the operation of the airbag So that the insufficient safety can be supplemented as described above.

However, it is quite difficult to integrate such an automatic locking retractor function into the retractor and the technology to add infant seat detection to the airbag module, so it is now difficult to integrate each technology into individual components .

Therefore, if it can be integrated, it will be possible to reduce the number of parts required to implement each technology, as well as to protect infants on the infant seat more reliably and reliably.

Accordingly, the inventors of the present invention relate to a retractor for a seat belt for Korean Registered Patent No. 10-1152602, which was previously invented by the inventors of the present invention and registered with the patent, and how it relates to an airbag module, To the extent that it would be possible to add to it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a retractor for a seat belt capable of confirming whether or not an infant seat is mounted by confirming whether an automatic locking retractor operates or not.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments that are described. It will be apparent to those skilled in the art, There will be.

According to an aspect of the present invention, there is provided a spool comprising: a spool in which a webbing is wound; A frame rotatably coupled to the spool and receiving a webbing wound on the spool; A flywheel gear which is provided at its center with a driving gear coaxial with the rotating shaft of the spool and which has one-directional teeth formed along the outer circumferential surface thereof and which is mounted on one end of the spool and rotates together with the spool; When the webbing is pulled out by a predetermined first length, the webbing is caught by the unidirectional teeth to allow the webbing to be pulled out but prevented from being pulled out, and after the webbing is pulled out by the predetermined first length, A lever that allows both the pulling-out and pulling-out of the webbing apart from the unidirectional teeth when the webbing is pulled out by a length; An integrated plate having a driven gear interlocked with a driving gear of the flywheel gear and rotating together with the spool and the flywheel gear, the integrated plate having a first plate for adjusting the lever according to a drawn-out length of the webbing; And a detection unit for detecting whether the lever is adjusted through a sensor unit provided adjacent to the lever when the lever is adjusted by the first plate, And can be accomplished by a retractor for a seat belt that can be mounted or not.

Here, the first plate may include a first outer circumferential surface contacting the lever when the webbing is pulled back by a predetermined first length, and a second outer circumferential surface contacting the lever when the webbing is retracted by a predetermined second length, Wherein the first outer circumferential surface and the second outer circumferential surface are formed as circumferential surfaces having different radii so as to change the position of the lever while rotating so that the lever is engaged with the one- Or fall off.

The retractor for a seat belt according to an embodiment of the present invention may further include a tilt sensor for preventing the webbing from being pulled out by the unidirectional teeth when the frame is inclined over a predetermined angle The integrated plate may further include a second plate formed integrally with the first plate to determine whether the inclination sensor is operated.

In this case, the second plate may have a third outer circumferential surface and a fourth outer circumferential surface, which are in contact with the inclination sensor, and the third outer circumferential surface may be provided with a second outer circumferential surface to prevent the webbing from being pulled out when the frame is inclined by a predetermined angle or more. And the fourth outer circumferential surface allows the webbing to be pulled out regardless of an angle at which the frame is inclined when the webbing is pulled out by a predetermined third length, It is possible to prevent the inclination sensor from being caught by the one-way tooth.

The lever may include a body disposed adjacent to the flywheel gear and the integrated plate; A first protrusion protruding from the body and in contact with the first plate; A second projection projecting from the body and spaced apart from the first projection, the second projection being engaged with the one-way tooth when the webbing is drawn out by a predetermined first length; And a position fixing unit for preventing the second projection from falling off the one-way tooth due to an external force generated when the webbing is pulled after the second projection is caught by the one-way tooth.

At this time, when the webbing is pulled out by a predetermined first length, the first projection is in contact with the first outer peripheral surface of the first plate and the second projection is caught in the one-way tooth so that the webbing can not be drawn out any more When the webbing is retracted after being drawn out by the predetermined first length and drawn out by a predetermined second length, the first projection is in contact with the second outer peripheral surface of the first plate, and the second projection Away from the unidirectional teeth, the webbing can again be drawn out.

On the other hand, when the webbing is taken out by a predetermined first length and the second protrusion is caught by the one-way tooth, It is confirmed that the infant sheet is attached. However, even if the second protrusion is separated from the unidirectional tooth until the second protrusion is caught by the unidirectional tooth, It can be confirmed that it is installed.

The sensing unit may include a position sensor unit for sensing a relative position of the second protrusion so that the second protrusion can be checked whether the first protrusion is caught by the unidirectional teeth or not.

In this case, the position sensor unit may include a circuit board on which the hall sensor is mounted, a housing on which the circuit board is mounted, and a second protrusion provided opposite to the second protrusion, wherein when the second protrusion is caught by the one- And a magnet member inserted into the housing, wherein when the magnet member is inserted into the housing, the magnets and the hall sensor are adjacent to each other, the intensity of the current flowing through the Hall sensor is changed, It is possible to determine whether or not the second projecting portion is caught by the unidirectional tooth or apart from the circuit board by determining whether the strength of the first projecting portion is changed or not, It can be confirmed that the infant sheet is attached.

On the other hand, the sensing unit adjusts the position of the magnet member with respect to the housing before the second protrusion is separated from the one-way tooth, and when the second protrusion is caught by the one-way tooth, And may further comprise an elastic member for restoring the magnet member.

The sensing unit may include an induction protrusion formed on one surface of the magnet member facing the second protrusion so as to help the magnet member enter the inside of the housing when the second protrusion is separated from the unidirectional tooth, .

In addition, the position sensor unit may include a circuit board on which the Hall sensor is mounted, and a magnet member mounted on the second protrusion. When the second protrusion is caught by the unidirectional teeth and then falls, the magnet member and the hole The second protrusion is caught by the one-way tooth or the second protrusion is determined by determining whether the intensity of the current flowing through the hall sensor is changed while the sensors are adjacent to each other and whether the intensity of the current flowing through the hall sensor is changed, It can be confirmed that the child seat is attached when the second projecting portion is hooked on the one-way tooth as described above. Here, And a second portion having a polarity opposite to the polarity of the first portion, The first portion and the second portion may be formed asymmetrically with respect to each other so as to prevent the second portion from being mounted on the protrusion opposite the hall sensor.

At this time, the magnet member can be manufactured through injection so that the first portion and the second portion can be formed asymmetrically with each other.

Meanwhile, the sensing unit may be connected to an electronic control unit (ECU) that determines whether or not the infant seat is mounted and determines whether to operate the airbag.

According to the retractor for a seat belt according to the present invention, it is possible to confirm whether the child seat is attached or not by confirming whether the automatic locking retractor is operated or not.

In addition, with the seat belt retractor for confirming whether or not the infant seat is mounted according to the present invention, the seat belt for protecting the infant on the infant seat is provided with a technique for retractor, The technology can be integrated to reduce the number of parts needed to implement each technology, as well as to protect children more reliably and reliably.

In addition, according to the retractor for a seat belt which can confirm whether or not the child seat is mounted according to the present invention, not only the integrated technology described above but also a block-out function can be realized.

1 is an exploded perspective view of a retractor for a seat belt according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of a part of a lever, an integration plate, a reduction gear, and the like in the embodiment shown in FIG.
3 is an enlarged plan view of the integrated plate in the embodiment shown in FIG.
FIG. 4 is an enlarged bottom view of the integrated plate in the embodiment shown in FIG. 1. FIG.
5 is an enlarged plan view of the reduction gear in the embodiment shown in FIG.
FIG. 6 is an exploded perspective view illustrating the sensing unit in an enlarged manner in the embodiment shown in FIG. 1. FIG.
FIG. 7 is a partial perspective view showing the spool and webbing to explain the operation of the embodiment shown in FIG. 1. FIG.
Figs. 8 and 9 are schematic diagrams showing the detection unit before operation in the embodiment shown in Fig. 1. Fig.
FIGS. 10 and 11 are schematic views showing the operation after the sensing unit operates in the embodiment shown in FIG. 1. FIG.
12 and 13 are schematic diagrams for explaining the configuration and operation of the modification of the sensing unit in the embodiment shown in FIG.
Figs. 14 and 15 are schematic diagrams for explaining the configuration and operation of another modification of the sensing unit in the embodiment shown in Fig. 1. Fig.
Fig. 16 is a partial perspective view showing a part of another modification of the sensing unit shown in Figs. 14 and 15; Fig.
17 is an enlarged perspective view of the lever and the magnet member shown in Fig.
FIG. 18 is a cross-sectional view showing a state in which a magnet member is coupled to a second projection of the lever shown in FIG. 16;
FIG. 19 is a perspective view of the circuit board and the protection member with the Hall sensor shown in FIG. 16, looking from the other direction. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

1 to 6, a configuration of a retractor for a seat belt according to an embodiment of the present invention will be described in detail.

FIG. 1 is an exploded perspective view of a retractor for a seat belt according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a retractor for a seat belt according to an embodiment of the present invention. FIG. 3 is a plan view showing an enlarged view of the integrated plate in the embodiment shown in FIG. 1, and FIG. 4 is an enlarged view of the integrated plate in the embodiment shown in FIG. 1, FIG. 5 is an enlarged plan view of the reduction gear in the embodiment shown in FIG. 1, and FIG. 6 is an enlarged view of the sensing unit in the embodiment shown in FIG. 1 Fig.

1 to 6, an embodiment of a retractor for a seat belt according to the present invention includes a spool 100, a frame 200, a fly wheel gear 300, An inclination sensor 400, a lever 500, an integrated plate 600, a reduction gear 700, and a sensing unit 800. [

The spool 100 is a cylindrical winder on which the webbing 110 is wound. At this time, the webbing 110 is always wound on the spool 100 by the return spring assembly 120 in a direction to be drawn into the frame 200, which will be described later.

The frame 200 receives the webbing 110 therein so that the spool 100 is rotatably coupled to the frame 200. The return spring assembly 120 may be coupled to one side of the frame 200 to which one end of the spool 100 is coupled and the other side of the frame 200 to which the other end of the spool 100 is coupled A case 330 that surrounds the flywheel gear 300 to be described later may be coupled. Meanwhile, a guide groove may be provided between the outer surface of the frame 200 and the outer surface of the other side to guide the webbing 110 in only one direction.

The fly wheel gear 300 is coupled to the other end of the spool 100 so as to be rotatable together with the spool 100 and includes a inclination sensor 400, a lever 500, an integration plate 600, And determines whether or not the spool 100 rotates. At this time, whether or not the spool 100 rotates has a correlation with the pull-out or pull-in of the webbing 110 as described later.

The flywheel gear 300 is provided with a driving gear 310 coaxial with the rotating shaft of the spool 100 at its central portion, and unidirectional teeth 320 are formed along the outer peripheral surface.

The driving gear 310 may be coupled with a rotation center shaft protruding from the center of the other end of the spool 100. The drive gear 310 may be directly connected to the driven gear 610 of the integrated plate 600 or may be indirectly connected through the reduction gear 700 as described later. The driving gear 310 serves to transmit the rotation of the spool 100 to the flywheel gear 300 and the integrated plate 600 as the webbing 110 is drawn or drawn.

The inclination sensor 400 or the lever 500 to be described later is not engaged in the direction in which the webbing 110 is pulled in. However, in the direction in which the webbing 110 is pulled out, the inclination sensor 400 The lever 500 is engaged.

On the other hand, the flywheel gear 300 configured as described above may be surrounded by the case 330. This is provided for various purposes including the purpose of preventing mutual interference with the integrated plate 600, which will be described later.

More specifically, the case 330 may have a receiving space 332 for receiving the inclination sensor 400, which will be described later. At this time, a cover 334 covering the inclination sensor 400 so as not to be separated from the accommodation space 332 may also be provided. Various protrusions 336a, 336b, and 336c may be provided to allow the lever 500, the integrated plate 600, the reduction gear 700, and the like to be rotatably connected. A lid 338 may also be provided to cover the lever 500, the integrated plate 600, the reduction gear 700, and the like so as not to be detached after being rotatably connected to the case 330.

The vehicle sensor 400 is engaged with the unidirectional teeth 320 to prevent the webbing 110 from being pulled out when the frame 200 is inclined by a predetermined angle or more. The inclination sensor 400 may have any structure as long as it can function as described above. For example, the inclination sensor 400 included in the embodiment of the retractor for a seat belt according to the present invention includes a pushing portion directed toward the unidirectional tooth 320, a pushing portion for pushing when the frame 200 is inclined by a predetermined angle or more And a weight of a spherical shape for pressing the part.

The lever 500 serves to prevent the webbing 110 from being pulled out when the webbing 110 is pulled out by a predetermined length, thereby realizing an automatic locking retractor function. That is, the lever 500, but the webbing 110 is drawn in a predetermined first length (l _1, 7 Note) drawn out, took the webbing 110, the one-way teeth 320. When it is as much as is allowed, and the webbing ( 110 from being drawn out. Then, the lever 500 includes a predetermined first length (l _1, 7 Note) by the webbing 110 is drawn drawn out a predetermined second length of the one-way teeth When it is pulled out by (l _2, see Fig. 7) Both of the pulling-out and pulling-out of the webbing 110 are allowed.

In addition, the lever 500 serves to confirm whether or not the infant seat is mounted together with the implementation of the automatic locking retractor function.

That is, the lever 500 includes a webbing 110 is a predetermined first length while drawn out as (l _1, 7 Note) based on whether or not engaged with the one-way teeth 320, a lever 500, the one-way teeth (320 ), And then the child seat is attached.

The operation of this lever 500 is adjusted by the first plate 620 of the integration plate 600 described later that rotates together with the spool 100 and the flywheel gear 300.

The lever 500 that operates in this manner may be configured in various ways, but the retractor for a seat belt according to the present invention may be exemplarily configured in the following manner.

First, an example of the lever 500 may include a body 510, a first protrusion 520, a second protrusion 530, and a position fixing portion 540.

The body 510 is disposed adjacent to the flywheel gear 300 and the integrated plate 600 and may be rotatably coupled to the case 330 or the frame 200 surrounding the flywheel gear 300. The first protrusion 520 and the second protrusion 530 may protrude from the body 510 and a position fixing unit 540 may be provided.

The first protrusion 520 protrudes from the body 510 and comes into contact with the first plate 620. The first protrusion 520 is adjusted by the first plate 620 so that the second protrusion 530 is moved along the length of the webbing 110, To be engaged with the unidirectional teeth 320.

That is, when the webbing 110 drawn out by a predetermined length is pulled by the return spring assembly 120, the spool 100 wound with the webbing 110 is rotated, and the integrated plate 600). When the integrated plate 600 rotates in this manner, the first plate 620 constituting the integrated plate 600 also rotates to move the first protrusions 520. When the first protrusion 520 moves, the body 510 rotates and the second protrusion 530 protruding from the body 510 moves so that the second protrusion 530 moves in the direction of the unidirectional tooth 320, .

The second projection 530 includes a first protrudes from the projecting portion is separated from the 520 body 510 moves as described above, the webbing 110 is a predetermined first length (l _1, see Fig. 7) as And is caught by the unidirectional tooth 320 when it is drawn out.

More specifically, the webbing 110 when the take-off as much as a predetermined first length (l _1, see Fig. 7), the first projection 520 is tangent to the first outer peripheral surface 622 of first plate 620 The second protrusion 630 is caught by the unidirectional tooth 320, so that the webbing 110 can no longer be drawn out. Moreover, the webbing 110 is a predetermined first length (l _1, Fig. 7 reference by a predetermined been re-drawn after the take-off second length (l _2, see Fig. 7 in the case as long as the take-off, the first projection (520 Is in contact with the second outer peripheral surface 624 of the first plate 620 and the second projection 530 is separated from the unidirectional tooth 320 so that the webbing 110 can be pulled out again.

The position fixing portion 540 is configured such that the second protrusion 530 is separated from the one-way tooth 320 due to an external force generated when the webbing 110 is pulled after the second protrusion 530 is caught by the unidirectional tooth 320 .

That is, even if the unidirectional teeth 320 are formed so as not to catch the inclination sensor 400 or the lever 500 in the direction in which the webbing 110 is drawn, as described above, since the teeth have a certain height , An external force such as an impact force or a frictional force may be generated due to contact with the inclination sensor 400 or the lever 500 when the webbing 110 is pulled. This external force may cause the second projection 530 engaged with the unidirectional tooth 320 to disengage, and the position fixing unit 540 prevents the second projection 530 from coming off.

The method for constructing the position fixing unit 540 may be any structure as long as it plays the role as described above. Hereinafter, the position fixing unit 540 will be described as an elastic unit and as a latch.

First, the position fixing unit 540 is fixed to the case 330 which surrounds the frame 200 or the flywheel gear 300, and the other end is connected to the first protrusion 520 or the second protrusion 530, Unit. That is, the position fixing unit 540 applies an elastic force so that the second projection 530 faces the unidirectional tooth 320, so that the second projection 530 due to the external force generated when the webbing 110 is pulled is moved in one direction And can be prevented from falling off the teeth 320.

In this way, when the position fixing portion 540 is formed of an elastic member, the lever 500 prevents the first protrusion 520 from being separated from the first plate 620 due to the position fixing portion 540, And may further include a third protrusion 550 protruding from the body 510.

The position fixing unit 540 may be formed as a latch that engages with the protrusion 350 provided in the case 330 that encloses the frame 200 or the flywheel gear 300. That is, after the second protrusion 530 is caught by the unidirectional tooth 320, the position fixing portion 540 is caught by the protrusion 350, so that the second protrusion 540 due to the external force generated when the webbing 110 is pulled- (530) can be prevented from falling off the unidirectional teeth (320).

The second protrusion 530 is formed in the case 330 surrounding the frame 200 or the flywheel gear 300 regardless of whether the position fixing unit 540 is formed by a latch or an elastic unit A guide portion 560 may be provided which moves toward the unidirectional tooth 320 or moves away from the unidirectional tooth 320. A latching jaw 562 for preventing the lever 500 from moving beyond the range of movement of the lever 500 may also be formed as one component constituting the guide portion 560. [

The integrated plate 600 rotates together with the spool 100 and the flywheel gear 300 and functions to adjust the lever 500 and the inclination sensor 400 according to the drawing length of the webbing 110. That is, the integrated plate 600 is a component that allows one embodiment of the retractor for a seat belt according to the present invention to implement the automatic locking retractor function and the block-out function together.

Particularly, since the integrated plate 600 is not an assembly in which separate components are assembled but is an integrated product including the components to be described later, in order to realize both the automatic locking retractor function and the block-out function, There is no such disadvantage.

This integrated plate 600 may include a driven gear 610 and a first plate 620 and a second plate 630.

The driven gear 610 is a gear interlocked with the driving gear 310 of the flywheel gear 300. That is, the driven gear 610 serves to allow the integrated plate 600 to rotate together with the flywheel gear 300 coupled with the spool 100.

The driven gear 610 having such a role is only a gear capable of interlocking with the driving gear 310, and its shape and structure are not limited. 3 and 4, the driven gear 610 is disposed on the opposite side of the first outer circumferential surface 622 to the fourth outer circumferential surface 634, which will be described later, toward the center of rotation of the integration plate 600 And may be formed of an internal gear provided.

At this time, a reduction gear 700 may be provided between the driving gear 310 and the driven gear 610. The reduction gear 700 serves to reduce the rotation speed of the integrated plate 600 by reducing the rotation rate of the driven gear 610 with respect to the drive gear 310 so as to be lower than the rotation speed of the flywheel gear 300.

The reduction gear 700 is disposed such that one side of the reduction gear 700 interlocks with the driving gear 310 and the other side of the reduction gear 700 interlocks with the driven gear 610. At this time, in order to reduce the rotation ratio of the driven gear 610 with respect to the driving gear 310, the number of gears on one side linked to the driving gear 310 is larger than the number of gears on the other side linked to the driven gear 610.

The first plate 620 has a first outer circumferential surface 622 and a second outer circumferential surface 624 to adjust the lever 500 according to the pull-out length of the webbing 110.

A first outer peripheral surface 622 is the webbing 110 is a predetermined first length (l _1, Fig. 7 reference) and an outer peripheral surface in contact with the lever 500. When the re-drawn after being drawn out by the second outer peripheral surface 624 a webbing (110) is an outer peripheral surface in contact with the pre-set length of the second lever 500 when the re-drawn after the (l _2, see Fig. 7) drawn by.

The first outer circumferential surface 622 and the second outer circumferential surface 624 are formed with circumferential surfaces having different radii so that the lever 500 is rotated while the lever 500 is rotated to the one- You can adjust it to hang or fall.

More specifically, the radius of the second outer peripheral surface 624 is larger than the radius of the first outer peripheral surface 622, so that the lever 500 can be adjusted. That is, the webbing 110, this group is pulled out is set by a first length (l _1, see Fig. 7), when again be drawn, the first projection 520 of the lever 500 in contact with the first outer peripheral surface 622, the lever ( The second projecting portion 530 of the one-way tooth 320 is engaged. However, continues to the first projection of the release of the webbing 110, is set the period incoming second length (l _2, 7 Note) as the lever (500) to when it is pulled out, a second outer peripheral surface 624, the radius is larger ( 520, and the body 510 of the lever 500 is rotated. The rotation of the body 510 of the lever 500 moves the second projection 530 of the lever 500 so that the second projection 530 of the lever 500 is separated from the unidirectional tooth 320.

The second plate 630 functions to determine whether the inclination sensor 400 is operated according to the pull-out length of the webbing 110 and is integrally formed with the first plate 620. That is, the second plate 630 may be formed of a single molded article having a stepped shape with the first plate 620. In addition, the second plate 630 may be formed to have an area larger than the area of the first plate 620.

The second plate 630 has a third outer circumferential surface 632 and a fourth outer circumferential surface 634 which are in contact with the inclination sensor 400.

The third outer circumferential surface 632 is formed in such a manner that when the webbing 110 is prevented from being pulled out when the inclination sensor 400 is operated and the frame 200 is inclined over a predetermined angle, 630, respectively. The fourth outer circumferential surface 634 is formed at a position where the webbing 110 is pulled out regardless of the angle at which the frame 200 is tilted when the webbing 110 is pulled out by a predetermined third length l ₃ That is, when the tilt sensor 400 is not operated, the tilt sensor 400 is in contact with the outer circumferential surface.

In this case, the fourth outer circumferential surface 634 is formed to protrude from the third outer circumferential surface 632, and when the webbing 110 is drawn out by a predetermined third length l ₃ (see FIG. 7), the inclination sensor 400, It is possible to prevent the inclination sensor 400 from being caught by the unidirectional teeth 320 by pushing it out of the flywheel gear 300.

More specifically, the webbing when 110 is more withdrawn than the third length set is a group (l _3, see Fig. 7) group to be drawn until it reaches the third length (l _3, see Fig. 7) is set, the inclination sensor The third contact surface 400 contacts the third outer circumferential surface 632 and can be caught by the unidirectional tooth 320 when the frame 200 is inclined by a predetermined angle or more. However, the webbing 110 is a predetermined third length of time the inlet is withdrawn as (l _3, Fig. 7 reference), the inclination sensor 400 is the fourth, and flush with the outer peripheral surface (634), overhanging the fourth outer circumferential face (634 Pushes the tilt sensor 400 outwardly of the flywheel gear 300 so that the tilt sensor 400 is no longer caught by the unidirectional teeth 320, (110) is allowed to freely enter and withdraw.

The integrated plate 600 may further include a reference gear 640 in addition to the driven gear 610 and the first and second plates 620 and 630.

The reference member 640 corresponds to the reference point 340 provided in the case 330 surrounding the flywheel gear 300 or the flywheel gear 300. When the webbing 110 is completely drawn out of the frame 200 a first length of a first outer peripheral surface 622 and the second outer peripheral surface 624, the lever 500 on one side 650, which is connected to set (l _1, 7 Note) the preset of the webbing 110, the length of the It can be used as a place to be located.

The reference plate 640 may be formed in a shape of an arrow on one surface of the integrating plate 600 or may be a protrusion protruding from the outer circumferential surface of the second plate 630.

The sensing unit 800 detects whether the lever 500 is adjusted through the sensor portion provided adjacent to the lever 500 when the lever 500 is adjusted by the first plate 620, . ≪ / RTI >

The sensing unit 800 may be configured to have any structure and shape as long as the infant seat is mounted on the lever 500 in cooperation with the lever 500 so that the infant seat can not be operated if the infant seat is mounted. And shapes of the present invention fall within the scope of the present invention.

However, for the sake of more detailed explanation, an example of the lever 500 as described above will be described as follows, for example.

That is, whether engaged with the detecting unit 800 includes a webbing 110 is a predetermined first length of the second one-way teeth 320, the projections 530 of the lever 500. As the take-off as (l _1, see Fig. 7) The second protrusion 530 is caught by the unidirectional tooth 320 and then is separated from the first protrusion 530. When the sensor unit senses that the second protrusion 530 is in contact with the unidirectional tooth 320,

However, even if the second protrusion 530 is not caught by the unidirectional tooth 320 until the second protrusion 530 is caught by the unidirectional tooth 320 after the infant sheet is affixed, As shown in Fig.

If not confirmed in this way, so when the webbing (110) after the infant seat is equipped with a predetermined second length is drawn out by (l _2, see Fig. 7) can be a case of mistaken as not equipped with the infant seat occurs Because.

However, when engaged with the back second projection 530, the one-way teeth 320, that is, the webbing 110, which is mounted once the group is drawn by a predetermined first length (l _1, see Fig. 7), the infant seat back And therefore, there is no possibility of misidentification as described above.

In order to prevent the occurrence of such a mistake, there is a method in which an auxiliary unit (not shown) may be additionally provided so that it can be confirmed again, and it is a matter of course to be able to notify the user through a display unit (not shown).

In order to easily detect whether or not the second protrusion 530 is caught by the unidirectional tooth 320, the sensor part is not limited to the type of the sensor, It is advantageous that the position sensor portion is capable of sensing the relative positional relationship of the two protrusions 530.

More specifically, to describe the sensing unit 800, an example of the sensing unit 800 and various modifications will be described with reference to FIGS. 8 to 15 as follows.

Here, FIGS. 8 and 9 are schematic diagrams showing a state before the sensing unit is operated in the embodiment shown in FIG. 1, and FIGS. 10 and 11 show a state in which the sensing unit operates in the embodiment shown in FIG. FIGS. 12 and 13 are schematic diagrams for explaining the configuration and operation of a modification of the sensing unit in the embodiment shown in FIG. 1, and FIGS. 14 and 15 are diagrams 1 is a schematic diagram for illustrating the configuration and operation of another modification of the sensing unit in the embodiment shown in Fig.

8 to 11, the sensing unit 800 includes a circuit board 830 to which a Hall sensor 840 is attached, a housing 810 mounted on one side of the circuit board 830, And a magnet member 820 which is provided opposite to the second protrusion 530 of the first protrusion 530 and enters the inside of the housing 810 when the second protrusion 530 is caught by the unidirectional tooth 320 and then falls off .

8 and 9, when the second protrusion 530 of the lever 500 is engaged with the unidirectional tooth 320, the second protrusion 530 (see FIG. 8) The magnet member 820 and the hall sensor 840 are not adjacent to each other because the magnet member 820 does not push the magnet member 820 into the housing 810. As a result, The strength is unchanged. Therefore, it is confirmed that the child seat is not yet mounted on the circuit board 830 because there is no recognition of the fact that the intensity of the current flowing through the Hall sensor 840 is changed.

10 and 11, when the second protrusion 530 of the lever 500 is caught by the unidirectional teeth 320 and then is separated from the first protrusion 530, the second protrusion 530 is inserted into the magnet member 820, The magnet member 820 and the hall sensor 840 are adjacent to each other and the intensity of the current flowing through the Hall sensor 840 is changed. Therefore, the circuit board 830 also recognizes that the intensity of the current flowing through the Hall sensor 840 has changed, confirming that the baby seat is attached.

8 to 11, the elastic member 850 may be further included in an example of the sensing unit 800 that operates as described above.

The elastic member 850 adjusts the position of the magnet member 820 with respect to the housing 810 before the second protrusion 530 falls to the unidirectional tooth 320 and the second protrusion 530 moves in one direction The second protruding portion 530 restores the magnet member 820 that has entered the housing 810 when the second protruding portion 530 is caught by the unidirectional teeth 320 again.

Such an elastic member 850 may be designed to have other members other than the coil spring as shown in the drawing if it can perform the functions as described above.

12 and 13, may further include an induction protrusion 860 for assisting the operation of the sensing unit 800. The sensing unit 800 may include a sensing unit 800,

The guide protrusion 860 is provided to assist the magnet member 820 into the housing 810 when the second protrusion 530 of the lever 500 falls to the unidirectional tooth 320, Is a component protruding from one surface of the magnet member 820 against the magnet member 530.

That is, when it is difficult to push the magnet member 820 into the housing 810 by the second projection 530 of the lever 500 and the second projection 530 of the magnet member 820, The second protrusion 530 can facilitate pushing the magnet member 820 into the housing 810 by providing the guide protrusion 860 in the magnet member 820 as shown in Fig.

The induction protrusion 860 may be designed to have a different shape without being shaped as shown in the drawings as long as it can perform the functions as described above.

Another modification of the sensing unit 800 that operates as shown in FIGS. 14 and 15 is a design modification to omit the housing 810 and the elastic member 850, and the hole sensor 840 ' May be configured such that a circuit board 830'attached to the case cover 338 is provided adjacent to the case cover 338 and a magnet member 820'interacting with the hall sensor 840'is mounted to the second protrusion 530 have.

In order to further explain another modification of this sensing unit 800, the following description will be made with reference to Figs. 16 to 19. Fig.

FIG. 16 is a partial perspective view showing a part of another modification of the sensing unit shown in FIGS. 14 and 15, FIG. 17 is an enlarged perspective view of the lever and the magnet member shown in FIG. 16, FIG. 18 is a cross-sectional view showing a state in which a magnet member is coupled to the second projection of the lever shown in FIG. 16, FIG. 19 is a view showing the circuit board and the protection member with the Hall sensor shown in FIG. It is a perspective.

As shown in FIGS. 16 to 19, the magnet member 820 'is mounted on the second protrusion 530 and is not mounted with a simple adhesive, but in order to prevent erroneous mounting by the manufacturer in consideration of polarity, Can be mounted together.

That is, the magnet member 820 'has a polarity opposite to the polarity of the first portion 820'a and the first portion 820'a having the polarity (S pole) responsive to the hall sensor 840' The first portion 820'a has a second portion 820'b having a first portion 820'a and a second portion 820'b having a second portion 820'b having N poles, And the second portion 820'b are formed to have different shapes. That is, by forming the first portion 820'a and the second portion 820'b asymmetrically, it is possible to prevent the magnet member 820 'from being erroneously mounted on the second projection portion 530.

In order to form the first portion 820'a and the second portion 820'b asymmetrically, it is not possible to form the ferrite according to the conventional ferrite processing method, And PA6), it is advantageous to use an injection method.

On the other hand, since the circuit board 830 'with the Hall sensor 840' is weak in durability, it is advantageous to fit the circuit board protector 870 when it is provided adjacent to the case cover 338, It goes without saying that the shape of the protector 870 has no effect on the scope of the rights.

14, when the second projection 530 of the lever 500 is engaged with the unidirectional tooth 320, the second projection 530 of the second projection 530 is engaged with the second projection 530 of the second projection 530. In this case, The current does not flow through the hall sensor 840 'since the magnet member 820' is not adjacent to the hall sensor 840 ', and therefore the current is not received by the circuit board 830' It is confirmed that it is not.

15, when the second protrusion 530 of the lever 500 is caught by the unidirectional teeth 320 and then is dropped, the magnet member 820 'provided on the second protrusion 530 is inserted into the hole The sensor 840 'is adjacent to the sensor 840', so that a current flows through the Hall sensor 840 ', thus confirming that the child seat is mounted on the circuit board 830'.

One example and various modifications of the sensing unit 800 as described above are connected to an electronic control unit (ECU) 900 for determining whether or not the infant seat is mounted and operating the airbag.

It should be noted that the electronic control unit 900 may be connected to the circuit boards 830 and 830 'if the sensing unit 800 is provided as described above. The circuit board connecting portion 880 may be a circuit board connecting portion.

In addition, the electronic control unit 900 may be provided in an airbag module, but may be provided in an integrated module that cooperates with other safety devices in the vehicle and may be configured to control the airbag module via CAN communication, It goes without saying that the scope of the present invention is not limited by design changes to such electronic control unit 900.

Next, referring back to FIG. 7 and FIG. 8 to FIG. 13 referred to above, the operation and effect of one embodiment of a retractor for a seat belt in which the infant seat according to the present invention can be confirmed will be described in detail.

Here, FIG. 7 is a partial perspective view showing the spool and the webbing in order to explain the operation of the embodiment shown in FIG.

First, referring to FIG. 7, a description will be given of an embodiment of a retractor for a seat belt that can confirm whether or not a child seat is attached according to the present invention, according to the length of the webbing 110 taken out.

The webbing 110 is wound around the spool 100 to be always pulled by the return spring assembly 120. However, the webbing 110 is pulled out to a predetermined length according to the user's need.

However, when the webbing 110 is pulled out by a predetermined first length l ₁ , the first protrusion 520 of the lever 500 is engaged with the first outer peripheral surface of the first plate 620 of the integrated plate 600 And the second projecting portion 530 of the lever 500 is caught by the unidirectional teeth 320 of the flywheel gear 300. Thus, the webbing 110 is a predetermined first length (l ₁₎ when drawn out by the webbing, the 110 is just no longer take-occupancy.

The take-off protection with the incoming allow the webbing 110 by a first length (l ₁₎ that implement one embodiment of automatic locking retractor function of the seat belt retractor for, a predetermined webbing 110 in accordance with the present invention It may be time to implement an automatic locking retractor function.

The webbing 110 may be positioned such that the lever 500 is positioned at one side 650 of the first plate 620 to which the first outer circumferential surface 622 and the second outer circumferential surface 624 are connected, And is drawn out by a predetermined first length l ₁ .

On the other hand, the viewpoint can be adjusted as desired by the user, but can be made when the webbing 110 is fully drawn out from the frame 200 for convenience of setting the viewpoint. That is, the predetermined first length l _{1 of the} webbing 110 may be the length when the webbing 110 is completely drawn out of the frame 200, as shown in Fig.

When the webbing 110 is continuously pulled and the webbing 110 is pulled out by a predetermined second length l ₂ , the first projection 520 of the lever 500 is pulled out of the first plate 620 of the integrated plate 600 And the second projection 530 of the lever 500 is released from the unidirectional tooth 320 of the flywheel gear 300. Accordingly, when the webbing 110 is pulled out by the predetermined second length l ₂ , the webbing 110 is free to be pulled out and pulled in.

A second length such webbing permit the free take-off and pulling of 110 is predetermined to be, the webbing 110 to disable one embodiment of automatic locking retractor function of the seat belt retractor according to the present invention (l ₂₎ Can be an end point implementing the automatic locking retractor function.

That is, the end point may be defined as being on the other side 660 of the first plate 620 to which the first outer circumferential surface 622 and the second outer circumferential surface 624 are connected, And is drawn out by a predetermined second length l ₂ .

On the other hand, when the webbing 110 is pulled out by the predetermined second length l ₂ , the end point for implementing the function of the automatic locking retractor is determined, and a point serving as a switch for confirming whether or not the infant seat is mounted .

That is, if the webbing 110 is in the predetermined first length l ₁ and the predetermined second length l ₂ , the webbing 110 is in the section for implementing the automatic locking retractor function, However, if the webbing 110 is less than the predetermined second length ₁₂ , it will not be in the section for implementing the automatic locking retractor function, which is not intended to mount the infant seat.

Thus, the webbing 110 on the basis of whether the predetermined second length (l ₂₎ at least take-off, that is, based on whether or not the lever 500 falls is hanging on the one-way teeth 320 infant seat is It can be confirmed whether or not it is mounted.

In this case, it is assumed that the sensing unit 800 is included in one embodiment of the present invention in order to check whether the lever 500 is hooked on the unidirectional teeth 320 or not, As already discussed above, the description thereof will be omitted.

As described above, according to the embodiment of the retractor for a seat belt according to the present invention, it is possible to confirm whether or not the child seat is mounted by confirming the operation of the automatic locking retractor, It is possible to protect the infant more stably by not operating the airbag when the infant seat is mounted on the base.

On the other hand, when the webbing 110 is pulled out by a predetermined third length l ₃ regardless of the _first and second predetermined lengths l ₁ and l _{2 of the} webbing 110, The pressing portion of the sensor 400 is brought into contact with the fourth outer circumferential surface 634 of the second plate 620 of the integrated plate 600 and the pressing portion of the inclination sensor 400 is brought into contact with the unidirectional tooth 320 of the flywheel gear 300, . Thus, the webbing 110 is a predetermined third length (l ₃₎ as it is drawn out the incoming frame 200 is independent of the angular tilt sensor 400 is tilted is failure to effect the webbing 110 is drawn out and the incoming Becomes free.

On the contrary, if the webbing 110 is pulled out more than the third predetermined length l ₃ , the pushing portion of the inclination sensor 400 is pressed against the third outer peripheral surface of the second plate 620 of the integrated plate 600, It is determined whether or not the pushing portion of the inclination sensor 400 is caught by the unidirectional teeth 320 of the flywheel gear 300 according to the angle at which the frame 200 is tilted.

The take-off protection with the incoming allow the webbing 110 is to implement an embodiment of the block-out function for a seatbelt retractor according to the invention, to take-off by a third length (l ₃₎ preset the webbing 110 It can be a reference point for implementing the block-out function.

At this time, the reference point for implementing the block-out function is independent of the start point and the end point of the above-described automatic locking retractor function. 6, the predetermined third length l ₃ of the webbing 110 may be longer than the predetermined second length l ₂ .

That is, according to the embodiment of the retractor for a seat belt according to the present invention, it is possible to confirm whether the child seat is mounted or not by confirming the operation of the automatic locking retractor, It can be implemented integrally without being implemented as a part of the device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, such modifications or variations should not be individually understood from the technical spirit and viewpoint of the present invention, and modified embodiments should be included in the claims of the present invention.

100: spool
110: webbing 120: return spring assembly
200: frame
300: flywheel gear 310: drive gear
320: one-way tooth 330: case
332: inclination sensor accommodation space 334: accommodation space cover
336a, 336b, 336c: projection 338: case cover
340: reference point 350: projection
400: inclination sensor
500: lever 510: body
520: first protrusion 530: second protrusion
532: inclination sensor connecting portion 534: magnet member accommodating portion
540: Position fixture 550: Third protrusion
600: integrated plate 610: driven gear
620: first plate
622: first outer circumferential surface 624: second outer circumferential surface
630: second plate
632: third outer circumferential surface 634: fourth outer circumferential surface
700: Reduction gear
800: Detection unit
810: Housing 820, 820 ': Magnet member
820'a: first portion of the magnet member 820'b: second portion of the magnet member
830, 830 ': Circuit board 840, 840': Hall sensor
850: elastic member 860: guiding projection
870: Circuit board protector 880: Circuit board connector
900: Electronic control unit
l ₁ : predetermined first length of webbing
l ₂ : predetermined second length of the webbing
l ₃ : predetermined third length of webbing

Claims (15)

A spool in which webbing is wound;
A frame rotatably coupled to the spool and receiving a webbing wound on the spool;
A flywheel gear which is provided at its center with a driving gear coaxial with the rotating shaft of the spool and which has one-directional teeth formed along the outer circumferential surface thereof and which is mounted on one end of the spool and rotates together with the spool;
When the webbing is pulled out by a predetermined first length, the webbing is caught by the unidirectional teeth to allow the webbing to be pulled out but prevented from being pulled out, and after the webbing is pulled out by the predetermined first length, A lever that allows both the pulling-out and pulling-out of the webbing apart from the unidirectional teeth when the webbing is pulled out by a length;
An integrated plate having a driven gear interlocked with a driving gear of the flywheel gear and rotating together with the spool and the flywheel gear, the integrated plate having a first plate for adjusting the lever according to a drawn-out length of the webbing; And
And a detection unit for detecting whether the lever is adjusted through a sensor unit provided adjacent to the lever when the lever is adjusted by the first plate,
Retractor for seat belt to check whether infant seat is fitted.
The method according to claim 1,
Wherein the first plate includes:
A first outer circumferential surface contacting the lever when the webbing is pulled out by a predetermined first length, and a second outer circumferential surface contacting the lever when the webbing is retracted after being drawn out by the predetermined second length, , ≪ / RTI &
Wherein the first outer circumferential surface and the second outer circumferential surface are formed as circumferential surfaces having different radii so as to adjust the lever so as to be caught or fallen by the unidirectional teeth by changing the position of the lever while rotating.
Retractor for seat belt to check whether infant seat is fitted.
3. The method of claim 2,
Further comprising an inclination sensor for preventing the webbing from being pulled out by the unidirectional teeth when the frame is inclined by a predetermined angle or more,
Wherein the integrated plate comprises:
Further comprising a second plate formed integrally with the first plate to determine whether the inclination sensor is operated or not.
Retractor for seat belt to check whether infant seat is fitted.
The method of claim 3,
Wherein the second plate
A third outer circumferential surface and a fourth outer circumferential surface in contact with the inclination sensor,
Wherein the third outer circumferential surface allows the inclination sensor to be caught by the one-way tooth so as to prevent the webbing from being pulled out when the frame is inclined by a predetermined angle or more,
Wherein the fourth outer circumferential surface prevents the inclination sensor from being caught by the one-way tooth so as to allow the webbing to be pulled out regardless of an angle at which the frame is inclined when the webbing is pulled out by a predetermined third length ≪ / RTI >
Retractor for seat belt to check whether infant seat is fitted.
5. The method of claim 4,
The lever
A body disposed adjacent to the flywheel gear and the integrated plate;
A first protrusion protruding from the body and in contact with the first plate;
A second projection projecting from the body and spaced apart from the first projection, the second projection being engaged with the one-way tooth when the webbing is drawn out by a predetermined first length; And
And a position fixing portion for preventing the second projection from falling off the one-way tooth due to an external force generated when the webbing is pulled after the second projection is caught by the one-way tooth.
Retractor for seat belt to check whether infant seat is fitted.
6. The method of claim 5,
When the webbing is pulled out by a predetermined first length, the first projection is in contact with the first outer peripheral surface of the first plate and the second projection is caught in the one-way tooth, so that the webbing is no longer able to be drawn out ,
Wherein when the webbing is pulled out again after being drawn out by the predetermined first length and drawn out by a predetermined second length, the first projection is in contact with the second outer peripheral surface of the first plate and the second projection is in contact with the one- , The webbing is allowed to be pulled out again.
Retractor for seat belt to check whether infant seat is fitted.
6. The method of claim 5,
The sensing unit includes:
Wherein the webbing is pulled out by a predetermined first length, and based on whether or not the second projecting portion is caught by the one-way tooth,
The second protrusion is caught by the unidirectional teeth and is separated from the first protrusion,
Wherein it is confirmed that the infant seat is mounted even if the second protrusion is separated from the unidirectional tooth until the second protrusion is caught by the unidirectional tooth after it is confirmed that the infant sheet is mounted thereon ,
Retractor for seat belt to check whether infant seat is fitted.
8. The method of claim 7,
Wherein the sensing unit includes a position sensor unit capable of sensing a relative position of the second protrusion so that the second protrusion can be checked whether the first protrusion is caught or separated by the one-
Retractor for seat belt to check whether infant seat is fitted.
9. The method of claim 8,
The position sensor unit includes:
And a magnet member which is provided to face the second protrusion and enters the inside of the housing when the second protrusion is caught by the unidirectional teeth and then falls into the inside of the housing, the circuit board comprising: a circuit board on which the hall sensor is mounted; Including,
When the magnet member is inserted into the housing, the magnet member and the Hall sensor are adjacent to each other, and the intensity of the current flowing through the Hall sensor is changed. Whether the intensity of the current flowing through the Hall sensor is changed, Wherein the second protrusion is checked whether or not the second protrusion is caught or separated from the one-way tooth.
Retractor for seat belt to check whether infant seat is fitted.
10. The method of claim 9,
The sensing unit includes:
And an elastic member for adjusting the position of the magnet member with respect to the housing before the second protrusion is separated from the unidirectional tooth and returning the magnet member that has entered the inside of the housing when the second protrusion is again caught by the one- Lt; RTI ID = 0.0 > 1, < / RTI &
Retractor for seat belt to check whether infant seat is fitted.
10. The method of claim 9,
The sensing unit includes:
Further comprising an induction protrusion formed on one surface of the magnet member opposite to the second protrusion so as to assist the magnet member to enter the inside of the housing when the second protrusion is separated from the unidirectional tooth ,
Retractor for seat belt to check whether infant seat is fitted.
9. The method of claim 8,
The position sensor unit includes:
A circuit board on which a Hall sensor is mounted, and a magnet member mounted on the second protrusion,
Wherein when the second protrusion is caught by the one-way tooth and falls, the magnet member and the hall sensor are adjacent to each other, thereby determining whether the intensity of the current flowing through the hall sensor is changed and the intensity of the current flowing through the hall sensor is changed Wherein the first projecting portion is attached to the one-way tooth or is separated from the first projecting portion by judging via the circuit board,
Retractor for seat belt to check whether infant seat is fitted.
13. The method of claim 12,
Wherein the magnet member comprises:
A first portion having a polarity responsive to the hall sensor and a second portion having a polarity opposite to the polarity of the first portion,
Characterized in that the first portion and the second portion are formed asymmetrical with respect to each other so as to prevent the second portion from being mounted on the protrusion opposite the hall sensor.
Retractor for seat belt to check whether infant seat is fitted.
14. The method of claim 13,
Wherein the magnet member comprises:
Wherein the first portion and the second portion are formed through injection so that the first portion and the second portion can be formed asymmetrically with each other.
Retractor for seat belt to check whether infant seat is fitted.
15. The method according to any one of claims 7 to 14,
The sensing unit includes:
Is connected to an electronic control unit (ECU) that determines whether or not the infant seat is mounted and determines whether to operate the airbag.
Retractor for seat belt to check whether infant seat is fitted.

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