KR102524018B1 - Seat belt retractor - Google Patents

Abstract

It relates to a seat belt retractor, and the seat belt retractor according to the present invention is mounted in a mounting space formed in the backrest of a seat installed in a vehicle, and includes a spindle module including a webbing and a spindle on which the webbing is wound on an outer surface, , The spindle is arranged in the mounting space along the front and rear direction of the vehicle corresponding to the thickness direction of the backrest, and by rotating the direction in which the spindle on which the webbing is wound is installed, the width in the front and rear direction mounted on the backrest of the seat is increased. You can slim it down to a minimum.

Description

Seat belt retractor {SEAT BELT RETRACTOR}

The present invention relates to a seat belt retractor, and more particularly, to a seat belt retractor that prevents the withdrawal of a seat belt in the event of a vehicle collision.

In general, a seat belt safety device is provided in a seat to ensure the safety of an occupant in a vehicle.

The seat belt safety device is a retractor that operates to wind or withdraw a belt-shaped seat belt webbing (hereinafter referred to as 'webbing') that fixes the occupant on a spool and a tongue fixed to one end of the webbing to be detachable It consists of an inserted buckle.

The retractor prevents an occupant wearing a seat belt from being thrown forward or separated from the seat due to driving inertia when the vehicle suddenly stops or accelerates due to an accident or the like. Such a retractor allows the webbing to be drawn out in a normal state when the seat belt is worn, but when a webbing pulling out acceleration or a change in the inclination of the vehicle is detected due to a vehicle collision, a device that suppresses further pulling out of the webbing, and the loosening or loosening of the webbing It may include an emergency tensioning device and a pre-tensioning device that reduce sagging, that is, slack.

For example, Patent Literature 1 and Patent Literature 2 below disclose a retractor technology for controlling unwinding and retracting operations of seat belt webbing.

On the other hand, when an acceleration greater than a predetermined value acts on the seat belt retractor in the horizontal direction or the inclination of the vehicle changes, as in the case of a car collision, the seat belt locking device is operated to prevent the webbing from being pulled out. Vehicle sensors that detect acceleration or inclination are applied.

As an inertial body used in the vehicle sensor, it is known to use a ball or a self-supporting inertial body.

For example, a vehicle sensor may be used to detect an inertial body that moves in critical situations where a higher than normal deceleration rate or tilt of the webbing is applied to the vehicle, and a control disk that is moved by the inertial body and rotates with the spool of the seat belt retractor. It includes a sensor lever that interacts with the outer teeth.

Such a seat belt retractor may be mounted on a vehicle body, for example, a center pillar of a vehicle, a backrest of a seat, a rear pillar, or the like. Accordingly, the mounting posture of the seat belt retractor may be variously changed according to structures such as the center pillar, the backrest of the seat, and the rear pillar. That is, the seat belt retractor is not always mounted in a horizontal state, and may be mounted in an inclined state at a certain angle in the left-right direction or the front-back direction from the horizontal state.

In particular, when the seat belt retractor is installed on the backrest of the seat, the inclination of the seat belt retractor changes according to the rotation of the backrest.

However, if the posture of the seat belt retractor according to the prior art is changed beyond a certain range, acceleration and inclination cannot be properly detected.

For example, when a retractor having a vehicle sensor has an attitude tilted over a certain range from a horizontal state, the distance between the control disk and the sensor lever provided on the vehicle sensor is too close, and the sensor lever operates sensitively, so proper locking is performed. The action cannot be performed.

Further, when a retractor having a vehicle sensor is mounted on the backrest of the seat and the seat backrest is tilted toward the front of the vehicle, the sensor lever of the vehicle sensor is caught on the outer teeth of the control disk and restricts the rotation of the spool.

Due to this, when an occupant wants to wear a seat belt, rotation of the spool is restricted, making it impossible to wear the seat belt.

In order to solve this problem, the present applicant discloses a seat belt retractor configuration having a vehicle sensor in which the fixing structure of the vehicle sensor is improved in Patent Document 3 below, and has applied for and registered a patent.

US Patent No. 6,499,554 (registered on December 31, 2002) US Patent No. 6,443,382 (registered on September 3, 2002) Republic of Korea Patent Registration No. 10-1766844 (Announced on August 9, 2017)

Meanwhile, with the recent development of self-driving cars, technologies for minimizing the volume of seats and seat belt retractors applied to vehicles have been developed. In particular, the seat has been slimmed down by designing the thickness of the backrest thin.

In the seat belt retractor according to the prior art, as the rotational axis of the spindle on which the webbing is wound is disposed in the same direction as the rotational axis of the backrest, the overall volume increases according to the amount of webbing wound on the spindle, and the seat belt retractor corresponding to the backrest There was a limit to reducing the front-to-back direction width of .

In addition, as the seat belt retractor according to the prior art is constructed by assembling a number of parts, the structure is complicated, and even if a failure or damage occurs in any one individual part, the corresponding part cannot be repaired, so the entire retractor There was a problem that had to be replaced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and to provide a seat belt retractor that secures and safely protects occupants in the event of a vehicle collision.

Another object of the present invention is to provide a seat belt retractor that can be applied to a seat that is made slim by reducing the thickness of the backrest.

Another object of the present invention is to provide a seat belt retractor that can be manufactured by modularizing each component by functional block and selectively combining each module.

In order to achieve the above object, the seat belt retractor according to the present invention is mounted in a mounting space formed on the back of a seat installed in a vehicle, and includes a spindle module including a webbing and a spindle on which the webbing is wound on an outer surface. And, the spindle is characterized in that it is disposed along the front-rear direction of the vehicle corresponding to the thickness direction of the backrest in the mounting space.

As described above, according to the seat belt retractor according to the present invention, by rotating the direction in which the spindle on which the webbing is wound is installed, the front-back width mounted on the backrest of the seat can be minimized and slimmed down.

That is, according to the present invention, by changing the arrangement direction of the spindle on which the webbing is wound, an effect of minimizing the mounting space required when applying to a slim seat by designing the thickness of the backrest to be thin is obtained.

Further, according to the present invention, the effect of modularizing each component applied to the seat belt retractor for each functional block and selectively combining modules corresponding to required functions to be manufactured is obtained.

Accordingly, according to the present invention, an effect is obtained that it can be applied to a slim type seat that has recently been developed and can implement an integrated seat belt that is integrated with the seat.

In addition, according to the present invention, the effect of being able to freely adjust the drawing direction and drawing angle in which the webbing wound on the spindle is drawn is obtained.

Accordingly, according to the present invention, it is possible to improve safety by adjusting the pulling direction and angle of the webbing according to the occupant's physical condition or purpose of use.

1 is an exemplary view of a seat belt retractor according to the prior art.
2 is an exploded perspective view of a seat belt retractor according to a preferred embodiment of the present invention;
Figure 3 is a perspective view showing an assembled state of each module shown in Figure 2;
4 and 5 are exemplary views showing a state in which each module shown in FIG. 2 is assembled in a different way;
6 is a detailed perspective view of the spindle module and sensor module shown in FIG. 2;
7 is a perspective view of the spindle module and sensor module shown in FIG. 6 from another angle;
8 is a rear view of a seat belt retractor according to another embodiment of the present invention;
9 is a perspective view of the seat belt retractor shown in FIG. 8;
10 is a view showing a state in which the seat belt retractor shown in FIG. 8 is mounted on the back of a seat;
11 and 12 are operating state diagrams showing a state in which the withdrawal angle of the webbing is adjusted, respectively.

Hereinafter, a seat belt retractor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, prior to describing the configuration of a seat belt retractor according to a preferred embodiment of the present invention, the configuration of a seat belt retractor according to the prior art will be schematically described with reference to FIG. 1 .

1 is an exemplary view of a seat belt retractor according to the prior art.

Hereinafter, the direction toward the steering wheel based on the seat of the vehicle is referred to as 'front (F)', and the opposite direction is referred to as 'rearward (B)'. In addition, terms indicating directions such as 'left (L)', 'right (R)', 'upper (U)' and 'downward (D)' are based on the aforementioned front (F) and rear (B) It is defined as pointing in each direction.

As shown in FIG. 1, the seat belt retractor 1 according to the prior art includes a spindle 3 on which seat belt webbing (hereinafter referred to as 'webbing') 2 is wound, and a sensor for detecting the inclination of the vehicle. Unit (4), an emergency tensioning unit (5) that reduces slack by winding webbing (2) in the event of a vehicle collision, and smoothly withdraws webbing (2) during normal driving of the vehicle and winds webbing (2) just before a collision to reduce slack It may include a pre-tensioning unit 6 that reduces the.

The sensor unit 4 detects a change in acceleration of pulling out the webbing or a change in inclination of the vehicle due to a vehicle collision.

The emergency tensioning unit 5 operates an inflator (not shown) containing gunpowder in response to a detection signal that detects a collision of a vehicle, and winds the webbing 2 around the spindle 3 using the pressure of the gas generated. give. Accordingly, the emergency tensioning unit 5 reduces the slack of the webbing 2 by winding the webbing 2 in the event of a vehicle collision, thereby reducing injuries to passengers.

When a vehicle collision is predicted through a sensor applied to the vehicle, the pre-tensioning unit 6 winds the webbing 2 around the spindle 3 by driving a motor capable of normal and reverse rotation. That is, the pre-tensioning unit 6 keeps the worn webbing 2 taut until a stronger acceleration or deceleration of the vehicle occurs without the occurrence of an accident under normal driving conditions, and the webbing 2 becomes loose. It is possible to prevent the possibility of injury to passengers by reducing the slack of the webbing 2 by winding the webbing 2 immediately before the collision of the vehicle.

Here, the spindle 3 is installed inside the fixed frame 7, and the sensor unit 4, the emergency tensioning unit 5, and the pre-tensioning unit 6 are disposed on both sides of the fixed frame 7, , Left and right housings 8 and 9 are coupled to the outside of each unit.

That is, each unit 4 , 5 , 6 is disposed along the transverse direction on both sides of the spindle 2 .

As such, the seat belt retractor (1) according to the prior art combines each of the parts, such as the spindle (3), the sensor unit (4), the emergency tensioning unit (5), and the pre-tensioning unit (6), in a complex structure. is manufactured by

For this reason, in the seat belt retractor (1) according to the prior art, the spindle (3) is installed between both side walls of the fixing frame, and the webbing (2) has one side wound on the outer surface of the spindle (3) and the other side is is drawn upwards

And in the seat belt retractor (1) according to the prior art, the spindle (3) is installed between both side walls of the fixing frame, and the webbing (2) has one side wound on the outer surface of the spindle (3) while the other side is moved upward. are withdrawn

Therefore, in the seat belt retractor 1 according to the prior art, as the length of the webbing 2 wound around the spindle 3 increases, the volume in the front-rear direction gradually increases.

Recently, a seat installed in a vehicle has been manufactured to be slim by designing a thin thickness of the backrest (hereinafter, abbreviated as 'thickness') in the front-back direction. In addition, an integrated seat belt integrated with the seat (Belt In Seat, BIS) is sometimes applied.

In particular, seats applied to self-driving cars are being developed so that they can rotate left and right, and the backrest can be rotated backwards up to 180°.

In this way, in order to install the seat belt retractor 1 on a slim seat, it is necessary to minimize the front-and-back direction width of the seat belt retractor 1 mounted on the seat, particularly the backrest.

However, in the seat belt retractor 1 according to the prior art, as described above, the spindle 3 faces the same direction as the rotational axis of the backrest in a state where the spindle 3 is installed between both side walls of the fixing frame 7. fitted to do

Therefore, the seat belt retractor 1 according to the prior art has a problem in that it is difficult to apply it to the backrest of a slim seat as the width in the front and rear direction increases according to the length of the webbing 2 wound on the outer surface.

In order to solve this problem, the present invention modularizes each component applied to the seat belt retractor for each functional block, and selectively combines modules corresponding to necessary functions to manufacture.

In addition, the present invention minimizes and slims the width of the seat belt retractor in the front and rear direction by changing the direction in which the spindle in which the webbing is wound is installed.

Next, the configuration of the seat belt retractor according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5 .

2 is an exploded perspective view of a seat belt retractor according to a preferred embodiment of the present invention, and FIG. 3 is a perspective view showing an assembled state of each module shown in FIG. 2 . And Figures 4 and 5 are each an exemplary view showing a state in which each module shown in Figure 2 is assembled in different ways.

As shown in FIGS. 2 and 3, the seat belt retractor 10 according to a preferred embodiment of the present invention includes the spindle 3, the sensor unit 4, and the emergency tensioning unit 5 described with reference to FIG. ), the pre-tensioning unit 6, etc. may be modularized and manufactured for each functional block, and may be assembled by selectively combining necessary modules.

That is, the seat belt retractor 10 according to a preferred embodiment of the present invention is manufactured by modularizing each component applied to the seat belt retractor 10 by functional block and selectively combining the modularized components.

For example, the seat belt retractor 10 can be assembled by selectively combining the spindle module 20, the sensor module 30, the emergency tensioning module 40, the pre-tensioning module 50, and additional function modules. can

The spindle module 20 and the sensor module 30 are basic modules constituting the seat belt retractor 10, and as shown in FIG. 2, they may be manufactured and assembled as individual modules or integrated into one module. may be

The sensor module 30 may include an acceleration sensor that detects a change in the pulling out acceleration of the webbing 21 or a tilt sensor that detects a change in inclination of the vehicle.

The spindle module 20 is provided with a spindle 22 around which the webbing 21 is wound.

The spindle module 20 may operate to wind the webbing 21 when a change in pulling out acceleration of the webbing 21 or a change in inclination of the vehicle due to a vehicle collision occurs.

The spindle module 20 may further provide a function of only retracting the webbing in a certain section to fix the child seat.

Hereinafter, the direction in which the webbing 21 is pulled out is set to the upper direction (U), and the direction in which the spindle 22 is mounted is set to the forward and backward directions (F, B).

In this embodiment, the thickness of the seat belt retractor 10, that is, the width in the front and rear direction, is minimized in order to be mounted on a slim seat.

For example, in this embodiment, each module is manufactured with the same thickness of approximately 40 mm to 90 mm, or based on the thickness of the spindle module 20, the remaining modules are manufactured with a thickness smaller than the thickness of the spindle module 20. It can be.

Also, each module is disposed on the side of the spindle module 20, that is, on the right or left side, or on the top or bottom of the spindle module 20, centering on the spindle module 20.

That is, as shown in FIGS. 2 and 3, the pre-tensioning module 50 is disposed on the left side of the spindle module 20, and the sensor module 30 and the emergency tensioning module are on the right side of the spindle module 20. (40) can be arranged up and down.

Of course, the present invention is not necessarily limited thereto.

For example, as shown in FIG. 4, the sensor module 30 and the emergency tensioning module 40 are disposed on the right side of the spindle module 20, and the pre-tensioning module 50 is the spindle module 20 can be placed at the bottom of

Alternatively, as shown in FIG. 5, the pre-tensioning module 50 is disposed on the left or right side of the spindle module 20, and the sensor module 30 and the emergency tensioning module 40 are the spindle module 20 And may be disposed under the pre-tensioning module (50).

In addition, in this embodiment, some of the above modules may be excluded or additional functional modules may be further combined and assembled according to necessity, such as vehicle specifications and seat belt retractor 10 specifications.

In this embodiment, the rest of the modules except for the spindle module 20 have the same thickness as the spindle module 20 or the spindle module 20 so as to keep the width of the seat belt retractor 10 mounted on the back of the seat constant in the front and rear directions. ) is manufactured with a thickness smaller than the thickness of

Therefore, the seat belt retractor 10 manufactures the thickness of each module to a minimum thickness, and arranges the remaining modules around the spindle module 20 on both sides, top, or bottom of the spindle module 20, so that the total volume is reduced. It can be minimized and made slim.

Each of the modules combined in this way may be arranged side by side or in a right angle direction so that the axes provided in each module all face the same direction, for example, the front and back direction.

Therefore, each module may be configured to continuously transmit or receive power using a power transmission unit such as a gear, chain, or belt.

On the other hand, in FIGS. 2 to 5, each module is schematically shown in a substantially hexahedron shape, but the present invention variously transforms the shape of each module according to the function and configuration of each module, and selectively combines the seat belt retractor can be manufactured.

For example, FIG. 6 is a detailed perspective view of the spindle module and sensor module shown in FIG. 2, and FIG. 7 is a perspective view of the spindle module and sensor module shown in FIG. 6 from another angle.

The spindle module 20 and the sensor module 30 are basic modules constituting the seat belt retractor 10, and as shown in FIGS. 6 and 7, they are integrated into one module or provided separately. Can be manufactured and assembled.

In addition, the emergency tensioning module 40 and the pre-tensioning module 50 may be disposed on one side of the basic module, for example, on the left side.

Each module combined in this way is installed so that the shaft provided in each module faces the same direction as the direction in which the spindle 22 is installed, and is configured to transmit power or receive power through a power transmission unit such as a gear.

The spindle module 20 is provided with a spindle 22 on which the webbing 21 is wound.

As shown in FIGS. 6 and 7 , the spindle 22 is disposed inside the housing 23 along the fore-and-aft direction, and the webbing 21 is wound around the outer surface of the spindle 22 .

On the other hand, a guide unit 24 is provided on the top of the housing 23 to guide the pulling direction of the webbing 21 in a direction different from the front-back direction in which the spindle 22 is installed, for example, in a right-angled direction, that is, in the left-right direction. can

The guide portion 24 includes a pair of guide frames 25 spaced apart from each other by a predetermined distance to form a drawing space 251 into which the webbing 21 is drawn, and a pair of guide frames 25. It may include a connecting member 26 connecting both ends to the housing 23, respectively.

A pair of guide frames 25 may be provided in a straight bar shape, a curved bar, or a plate, respectively.

Of course, the guide frame 25 may be changed to a square frame shape or a circular or elliptical frame shape in which a lead-out space 251 is formed in the center.

One or more connection members 26 may be provided to connect both ends of the guide frame 25 to the housing 23, respectively.

So, when viewed from the front, the guide portion 24 may have a cross section of an approximate 'L' shape.

Of course, the shape of the guide part 24 is not limited to this, and the cross section is approximately '∩' shape or '∩' shape depending on various conditions such as the outer shape of the housing 23, the location where the guide part 24 is installed, and the shape of its periphery. It can be changed in various ways such as ∧' shape and arc shape.

And the guide part 24 is disposed perpendicular to the direction in which the spindle 22 is disposed.

Accordingly, one end of the webbing 21 is wound around the outer surface of the spindle 22, and the other end of the webbing 21 is pulled out of the housing 23, and then the drawing space between the pair of guide frames 25 ( 251) is withdrawn upwards again.

At this time, the webbing 21 is arranged to face the front and rear directions when being drawn out from the housing 23, and rotates in one direction when being drawn out through the drawing space 251 between the pair of guide frames 25. It is drawn out along the left and right directions.

In this way, the present invention can minimize the width in the front-back direction when the webbing is mounted on the backrest of the seat by changing the arrangement direction of the spindle around which the webbing is wound.

In addition, the present invention minimizes the width of the spindle module in the front-rear direction, so that the spindle module and the seat belt retractor to which it is applied can be manufactured slim by minimizing the width at which the seat belt retractor is mounted.

Next, the configuration of a seat belt retractor according to another embodiment of the present invention will be described in detail with reference to FIGS. 8 to 10 .

8 is a rear view of a seat belt retractor according to another embodiment of the present invention, FIG. 9 is a perspective view of the seat belt retractor shown in FIG. 8, and FIG. 10 is a seat belt retractor shown in FIG. It is a drawing showing the state mounted on the backrest of 10(a) shows a front view of the sheet, and FIG. 10(b) shows a rear view of the sheet.

As shown in FIGS. 8 to 10, the seat belt retractor 10 according to another embodiment of the present invention is similar to the configuration of the seat belt retractor 10 described with reference to FIGS. 6 and 7, except that The emergency tensioning module 40 and the pre-tensioning module 50 are coupled to the top of the spindle module 20 .

That is, the seat belt retractor 10 according to another embodiment of the present invention can be manufactured by modularizing each part applied to the seat belt retractor 10 by functional block and selectively combining each modularized part. .

In addition, the spindle module 20 is provided with a spindle 22 around which the webbing 21 is wound.

The spindle module 20 may operate to wind the webbing 21 when a change in pulling out acceleration of the webbing 21 or a change in inclination of the vehicle due to a vehicle collision occurs.

The spindle module 20 may further provide a function of only retracting the webbing 21 in a certain section to fix the child seat.

Hereinafter, the direction in which the webbing 21 is pulled out is set to the upper direction (U), and the direction in which the spindle 22 is installed is set to the forward and backward directions (F, B).

In this embodiment, the thickness of the seat belt retractor 10, that is, the width in the front and rear direction, is minimized in order to be mounted on a slim seat.

Each module is disposed on the side of the spindle module 20, that is, on the left or right side, or on the top or bottom of the spindle module 20 with the spindle module 20 as the center.

For example, as shown in FIGS. 8 and 9 , the sensor module 30, the emergency tensioning module 40, and the pre-tensioning module 50 may be respectively disposed above the spindle module 20. .

Here, the spindle module 20 and the sensor module 30 are basic modules constituting the seat belt retractor 10, and may be integrated into one module or manufactured and assembled as individual modules.

In addition, the emergency tensioning module 40 and the pre-tensioning module 50 may be disposed on one side of the basic module, for example, on top.

Each module combined in this way is installed in a parallel or perpendicular direction so that the axis provided in each module faces the same direction as the direction in which the spindle 22 is installed, and transmits power or transmits power through a power transmission unit such as a gear. configured to be delivered.

For example, the axes provided in the emergency tensioning module 40 and the pre-tensioning module 50 are arranged parallel to the spindle 22, respectively, and the output shaft and sensor of the drive motor provided in the pre-tensioning module 50 An axis provided in the module 30 may be arranged along a left-right direction so as to be perpendicular to the spindle 22 .

Meanwhile, first and second brackets 27 and 28 may be coupled to the front and rear sides of the spindle module 20 to function as the housing 23 by being coupled to each other.

That is, the first bracket 27 is disposed on the front side of the spindle module 20, and the second bracket 28 is disposed on the rear side of the spindle module 28. In addition, coupling members coupled to each other are provided on both sides of the first bracket 27 and the second bracket 28, and installation members installed on the backrest 12 are provided at the lower ends of the first and second brackets 27 and 28. can be provided.

In addition, a drawing-out space 251 through which the webbing 21 is drawn may be provided at one side of the first and second brackets 27 and 28, at the lower left side as seen in FIG. 8 . A guide member 29 may be installed in the lead-out space 251 along the front-back direction in the same way as the spindle 22 .

The guide member 29 serves to guide the webbing 22 to be drawn upward. The guide member 29 is a roller whose front and rear ends are rotatably coupled to the first and second brackets 27 and 28 so that the webbing 21 can be smoothly wound or drawn out from the spindle 22. can be provided with

Therefore, the width of the entire seat belt retractor 10 in the front and rear direction may be limited to the width of the first and second brackets 27 and 28 in the front and rear direction.

Meanwhile, a mounting space 13 in which the seat belt retractor 10 is mounted may be provided in the backrest 12 of the seat 11 .

The mounting space 13 is provided inside the backrest 12, and on one side of the mounting space 13, a webbing guide 14 for guiding the webbing 21 drawn out from the spindle module 20 to the outside of the backrest 12. ) can be installed.

The mounting space 13 may be provided on the rear upper part of the backrest 12 .

Of course, in FIG. 10, the mounting space 13 is shown at the center of the upper end of the backrest 12, but the present invention is not necessarily limited thereto, and is formed at a position spaced downward by a predetermined interval from the upper end of the backrest 12 Or, it may be formed biased to the left or right from the center of the backrest (12).

An arrangement space 15 in which the webbing 21 is disposed toward the webbing guide 14 may communicate with one side of the mounting space 13 .

The webbing guide 14 may be provided to partially cover the top of one side of the backrest 12, for example, the upper left side of the backrest 12 and the edge of the upper right side of the backrest 12 when applied to the driver's seat 11.

Here, the webbing 21 is drawn out of the backrest 12 through the mounting space 13 and the placement space 15 in a state in which one end is wound around the spindle 22 in the front-back direction, and the webbing guide 14 As a result, the drawing direction may be changed so that both ends are approximately directed in the left and right directions.

That is, the pull-out direction of the webbing 21 is changed so that both ends disposed along the front-back direction between the spindle 22 and the webbing guide 14, that is, within the arrangement space 15, face the left-right direction.

At the same time, the webbing 21 may have a drawing angle adjusted according to the position of the webbing guide 14 .

For example, FIGS. 11 and 12 are operation state diagrams each showing a state in which the pulling out angle of the webbing is adjusted. 11 and 12 (a) respectively show front views of the sheet, and FIGS. 11 and 12 (b) respectively show a rear view of the sheet.

When the driver's seat 11 is an adult, the webbing 21 is disposed toward one side of the backrest 12, the left upper end or upward when viewed from FIG. 10 as shown in FIG. 10 . That is, one end of the webbing 21 is wound around the outer surface of the spindle 22, and the other end of the webbing 21 is pulled out of the seat belt retractor 10, and then the webbing guide 14 installed on the backrest 12 is drawn upward toward

On the other hand, as shown in FIGS. 11 and 12, when the occupant on the seat 11 is a woman, teenager, or infant who has a smaller physique than an adult, the seat 11 is pulled out from a position moved downward from the upper left corner of the backrest 12. The drawing angle can be adjusted so as to be.

For example, when the occupant adjusts the angle of the backrest by rotating the backrest backward, the webbing may be caught on the occupant's neck or shoulder, causing inconvenience.

In addition, it is necessary to adjust the drawing angle of the webbing 21 according to the physical condition of the occupant, that is, the occupant's body shape or purpose of use, such as when adults, teenagers, or infants board or when a child seat is installed.

Thus, an adjusting member (not shown) is installed in the webbing guide 14 so as to be movable within a predetermined range from the upper surface of the backrest 12 to the upper left side of the backrest 12, and the webbing 21 is guided according to the position of the adjusting member. The drawing angle is adjusted by rotating the member 29 as a rotating shaft.

As described above, according to the present invention, the webbing wound around the spindle is drawn out through one side of the first and second brackets, and the webbing drawn out angle can be freely adjusted inside the mounting space of the backrest.

Accordingly, the present invention can improve safety by adjusting the pulling direction and angle of the webbing according to the physical condition of the occupant or the purpose of use.

At this time, when the webbing 21 is pulled out of the spindle module 20, both ends are arranged to face the front and rear directions, and when pulled out through the placement space 15 and the webbing guide 14, the webbing 21 rotates in one direction so that both ends It is pulled out in a state in which it is arranged so as to face the left-right direction.

Through the process as described above, the present invention can minimize the width in the front-back direction when the webbing is mounted on the backrest of the seat by changing the arrangement direction of the spindle around which the webbing is wound.

In addition, the present invention reduces and minimizes the width of the webbing together with the thickness of the spindle module, so that the spindle module and the seat belt retractor to which it is applied can be manufactured slim by minimizing the width mounted on the seat.

In addition, the present invention can freely adjust the drawing direction and angle of the webbing drawn out from the spindle module.

Although the invention made by the present inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

That is, in the above embodiment, the seat belt retractor has been described as being manufactured by selectively combining a spindle module, a sensor module, an emergency tensioning module, and a pre-tensioning module, but the present invention has additional functions in addition to the above modules. It can also be manufactured by combining modules more selectively.

In the above embodiment, it has been described that the spindle arrangement direction and the webbing withdrawal direction are orthogonal, but the present invention is not necessarily limited thereto, and the spindle arrangement direction and the webbing withdrawal direction may vary depending on the surrounding conditions in which the spindle is installed. It may be altered to form a non-rectangular direction, for example an acute or obtuse angle.

Although the invention made by the present inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

The present invention modularizes each part applied to the seat belt retractor by functional block, selectively combines and manufactures modules corresponding to the necessary functions, rotates the direction in which the spindle on which the webbing is wound is installed, and mounts it on the back of the seat. It is applied to the seat belt retractor technology that slims down by minimizing the width in the front and rear directions.

1: seat belt retractor
2: webbing 3: spindle
4: sensor unit 5: emergency tensioning unit
6: pre-tensioning unit 7: fixed frame
8,9: left, right housing
10: seat belt retractor
11: seat 12: backrest
13: mounting space 14: webbing guide
15: Layout space
20: spindle module
21: webbing 22: spindle
23: housing 24: guide part
25: guide frame 251: withdrawal space
26: connecting member 27,28: first and second brackets
29: guide member
30: sensor module
40: emergency tensioning module
50: pre-tensioning module

Claims (10)

A spindle module including a seat belt webbing and a spindle on which the webbing is wound on an outer surface,
A sensor module that detects the tilt of the vehicle;
An emergency tensioning module for reducing slack by winding the webbing when a vehicle crash occurs, and
A pre-tensioning module, which reduces slack by winding the webbing immediately before a collision of the vehicle, is modularized and manufactured for each functional block and mounted in an installation space provided in the vehicle,
The spindle is disposed along the front and rear direction of the vehicle corresponding to the thickness direction of the backrest in the mounting space,
Each module is selectively combined with the spindle module and disposed on one or more of both sides, upper and lower sides of the spindle centered on the spindle module,
The axis provided in each combined module is arranged parallel to or perpendicular to the direction in which the spindle is arranged,
The seat belt retractor, characterized in that each shaft continuously transmits or receives power through a power transmission unit disposed on the front or rear side of the spindle. According to claim 1,
The spindle module further includes first and second brackets respectively disposed on the front and rear sides of the spindle,
The seat belt retractor, characterized in that the front and rear width of the seat belt retractor is limited to the front and rear widths of the first and second brackets. According to claim 1,
The seat belt retractor, characterized in that the webbing is pulled out in a direction different from the direction in which the spindle is disposed on the backrest. According to claim 1,
The seat belt retractor, characterized in that the pull-out direction and pull-out angle of the webbing are adjusted between the mounting space and the webbing guide installed on the backrest. According to claim 4,
The webbing guide is disposed to partially cover an upper end of one side of the backrest and an edge of the upper surface,
The seat belt retractor, characterized in that the withdrawal angle of the webbing is adjusted according to the position of the adjusting member movably installed in the webbing guide. According to claim 4,
The webbing is rotated so that both ends drawn out along the front and rear directions of the vehicle in the spindle module face the left and right directions of the vehicle in the arrangement space formed between the mounting space and the webbing guide, so that the pulling direction is changed. retractor. According to claim 2,
At one side of the first and second brackets, a drawing-out space through which the webbing wound on the spindle is drawn is formed.
A guide member for guiding the webbing to be wound or drawn out from the spindle is installed in the drawing-out space,
The seat belt retractor, characterized in that the front and rear ends of the guide member are rotatably shaft-coupled to the first and second brackets, respectively. delete delete delete

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