seat belt retractor

Abstract

The present invention relates to a seat belt retractor which is mounted in an installation space formed in the backrest of a seat installed in a vehicle, and which includes a spindle module including a webbing and a spindle around which the webbing is wound, the spindle being disposed along the longitudinal direction of the vehicle, which corresponds to the thickness direction of the backrest in the installation space, and thus, by rotating the direction in which the spindle around which the webbing is wound is installed, the longitudinal width mounted on the backrest of the seat can be minimized, thereby making the retractor slender.

Description

[Technical Field]

[0001] The present disclosure relates to a seat belt retractor, and more particularly to a seat belt retractor that prevents a seat belt from becoming disengaged during a vehicle collision. [Background technology]

[0002] Generally, vehicles are equipped with seat belt safety devices on their seats to ensure the safety of occupants.

[0003] This seat belt safety device includes a retractor that operates to allow a strip-shaped seat belt webbing (hereinafter referred to as "webbing") for securing an occupant to be wound onto or pulled out of a spool, and a buckle into which a tongue fixed to one end of the webbing is removably inserted.

[0004] The retractor prevents a seatbelted occupant from being thrown forward or pulled out of the seat due to driving inertia when the vehicle suddenly stops or accelerates due to a vehicle accident. Such a retractor allows the webbing to be withdrawn under normal conditions when the occupant is wearing the seat belt, but may include a device that prevents further withdrawal of the webbing when a change in the webbing withdrawal acceleration or a tilt of the vehicle is detected due to a vehicle collision, as well as an emergency tensioning device and a pre-tensioning device that reduce slack or sagging of the webbing, i.e., the webbing slack.

[0005] For example, the following Patent Documents 1 and 2 disclose retractor techniques for controlling the winding and unwinding operations of seat belt webbing.

[0006] On the other hand, when an acceleration exceeding a predetermined value is applied horizontally to the seat belt retractor, such as when a vehicle collision occurs, or when the vehicle inclination changes, a vehicle sensor that detects the acceleration or inclination is applied and activates the seat belt locking device to prevent the webbing from being pulled out.

[0007] Vehicle sensors that use balls as inertia members or independent inertia members are generally known in the art.

[0008] For example, the vehicle sensor includes an inertia member that moves in a dangerous situation where the vehicle decelerates at a rate higher than the normal webbing deceleration or tilts, and a sensor lever that interacts with the external teeth of a control disc that is moved by the inertia member and rotates together with the spool of the seat belt retractor.

[0009] Such a seat belt retractor may be attached to the vehicle body, for example, to a center pillar, a seat back, a rear pillar, etc. Therefore, the mounting position of the seat belt retractor may be changed in various ways depending on the structure of the center pillar, the seat back, the rear pillar, etc. That is, the seat belt retractor is not necessarily mounted in a horizontal position, but may be mounted in a position tilted at a predetermined angle in the left-right or front-rear direction from the horizontal position.

[0010] In particular, when the seat belt retractor is attached to the backrest of the seat, the inclination of the seat belt retractor may change as the backrest rotates.

[0011] However, as described above, if the attitude of the seat belt retractor of the related art changes beyond a specific range, the acceleration and inclination cannot be detected appropriately.

[0012] For example, if a retractor having a vehicle sensor is tilted beyond a certain range from the horizontal state, the distance between the control disc and the sensor lever of the vehicle sensor may become too close, resulting in the sensor lever operating too sensitively and preventing the locking operation from being performed properly.

[0013] In addition, a retractor having a vehicle sensor is attached to the seat back, and when the seat back is tilted toward the front of the vehicle, the sensor lever of the vehicle sensor catches on the external teeth of the control disc, restricting the rotation of the spool.

[0014] Therefore, when an occupant wants to fasten the seat belt, they may not be able to fasten the seat belt because the rotation of the spool is restricted.

[0015] In order to solve the above problems, the applicant of the present invention has filed a patent application, which is hereby registered, disclosing the configuration of a seat belt retractor having a vehicle sensor with an improved fixing structure, as set forth in the following Patent Document 3.

[0016] Meanwhile, with the recent development of autonomous vehicles, technologies have been developed to minimize the volume of seats and seat belt retractors used in vehicles, particularly by designing the backrest to be thinner, thereby making the seats slimmer.

[0017] In a seat belt retractor of the related art, the rotation axis of the spindle around which the webbing is wound is disposed in the same direction as the rotation axis of the seat backrest, so the total volume increases depending on the number of times the webbing is wound around the spindle, and there is a limit to how much the front-to-rear width of the seat belt retractor corresponding to the seat backrest can be reduced.

[0018] In addition, the seat belt retractor of the related art is constructed by assembling multiple parts, and therefore has a complex structure. If any one of the individual parts fails or is damaged, it is not possible to repair only that part, and the entire retractor must be replaced.

[0019] (Patent Document 1) U.S. Patent No. 6,499,554 (registered December 31, 2002)

[0020] (Patent Document 2) U.S. Patent No. 6,443,382 (issued September 3, 2002)

[0021] (Patent Document 3) Korean Patent Registration No. 10-1766844 (issued August 9, 2017) Summary of the Invention [Problem to be solved by the invention]

[0022] The object of the present disclosure is to solve the above-mentioned problems and to provide a seat belt retractor that secures and safely protects an occupant in the event of a vehicle collision.

[0023] Another object of the present disclosure is to provide a seat belt retractor that can be applied to a seat that is made slim by reducing the thickness of the seat back.

[0024] Yet another object of the present disclosure is to provide a seat belt retractor that is manufactured by modularizing each component into functional blocks and selectively combining the modules. [Means for solving the problem]

[0025] In order to achieve the above object, the seat belt retractor according to the present disclosure is mounted in a mounting space formed in the backrest of a seat installed in a vehicle, and the seat belt retractor includes a spindle module having a webbing and a spindle around whose outer peripheral surface the webbing is wound, and the spindle is disposed in the mounting space along the fore-and-aft direction of the vehicle corresponding to the thickness direction of the backrest. [Effects of the Invention]

[0026] As described above, according to the present disclosure, the direction in which the spindle around which the webbing is wound is rotated, thereby minimizing the width in the front-to-rear direction of the seat belt retractor attached to the seat back, thereby achieving the effect of slimming down the seat belt retractor.

[0027] In other words, according to the present disclosure, the thickness of the seat back can be designed to be thin by changing the arrangement direction of the spindle around which the webbing is wound, which has the effect of minimizing the installation space required when applying a seat belt retractor to a slim seat.

[0028] In addition, according to the present disclosure, there is an advantage that each component applied to the seat belt retractor can be modularized and manufactured into functional blocks, and modules corresponding to required functions can be selectively combined.

[0029] Therefore, according to the present disclosure, a seat belt retractor can be applied to slim seats that have been recently developed, and an integrated seat belt that is integrated into the seat can be realized.

[0030] Additionally, according to the present disclosure, there is an effect that the unwinding direction and unwinding angle of the webbing wound around the spindle can be freely adjusted.

[0031] Therefore, according to the present disclosure, safety can be improved by adjusting the unwinding direction and angle of the webbing according to the physical condition of the occupant or the purpose of use. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 1 is a diagram showing an example of a seat belt retractor according to the related art. [Figure 2] FIG. 2 is an exploded perspective view of a seat belt retractor according to a preferred embodiment of the present disclosure. [Figure 3] FIG. 3 is a perspective view showing the state in which the modules shown in FIG. 2 are assembled. [Figure 4] 4A to 4C show different assembly methods for each of the modules shown in FIG. 2. [Figure 5] 5A to 5C show different assembly methods for each of the modules shown in FIG. 2. FIG. [Figure 6] FIG. 6 is a perspective view showing in detail the spindle module and the sensor module shown in FIG. [Figure 7] FIG. 7 is a perspective view showing the spindle module and the sensor module shown in FIG. 6 from a different angle. [Figure 8] FIG. 8 is a rear view of a seat belt retractor according to another embodiment of the present disclosure. [Figure 9] FIG. 9 is a perspective view of the seat belt retractor shown in FIG. [Figure 10] FIG. 10 is a diagram showing a state in which the seat belt retractor shown in FIG. 8 is attached to the backrest of a seat. [Figure 11] FIG. 11 is an operational state diagram showing a state in which the unwinding angle of the webbing is adjusted. [Figure 12] FIG. 12 is an operational state diagram showing a state in which the unwinding angle of the webbing is adjusted. DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, seat belt retractors according to preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0034] Before describing the configuration of a seat belt retractor according to a preferred embodiment of the present disclosure, the configuration of a seat belt retractor according to the related art will be briefly described with reference to FIG.

[0035] FIG. 1 is a diagram showing an example of a seat belt retractor according to the related art.

[0036] Hereinafter, the direction from the vehicle seat toward the steering wheel will be referred to as "forward (F)," and the opposite direction will be referred to as "backward (B)." In addition, terms indicating directions such as "left side (L)," "right side (R)," "upward (U)," and "downward (D)" are defined to indicate the respective directions based on the above-mentioned forward direction (F) and backward direction (B).

[0037] As shown in FIG. 1, a seat belt retractor 1 of the related art may include a spindle 3 on which seat belt webbing (hereinafter referred to as "webbing") 2 is wound, a sensor unit 4 that detects the inclination of the vehicle, an emergency tensioning unit 5 that winds up the webbing 2 to reduce slack in the event of a vehicle collision, and a pre-tensioning unit 6 that smoothly pulls out the webbing 2 during normal vehicle driving and winds up the webbing 2 immediately before a vehicle collision to reduce slack.

[0038] The sensor unit 4 detects a change in the acceleration of the webbing being unwound due to a vehicle collision and a change in the inclination of the vehicle.

[0039] The emergency tensioning unit 5 can activate an inflator (not shown) in which explosives are embedded in response to a detection signal that detects a vehicle collision, and can also use the pressure of the generated gas to wind up the webbing 2 onto the spindle 3. In this way, the emergency tensioning unit 5 can reduce slack in the webbing 2 by winding up the webbing 2 in the event of a vehicle collision, thereby reducing the injury level of the occupant.

[0040] When a vehicle collision is predicted through a sensor applied to the vehicle, the pre-tensioning unit 6 can operate a motor capable of rotating and reversing to wind the webbing 2 onto the spindle 3. That is, during normal vehicle driving, even if no accident occurs, the pre-tensioning unit 6 can prevent the webbing 2 from loosening by maintaining the tension of the worn webbing 2 until a stronger acceleration or deceleration of the vehicle occurs, and can reduce the injury level of the occupant by reducing the slack in the webbing 2 by winding the webbing 2 immediately before a vehicle collision.

[0041] In this specification, the spindle 3 is installed inside a fixed frame 7, the sensor unit 4, the emergency tensioning unit 5 and the pre-tensioning unit 6 are arranged on both sides of the fixed frame 7, and left and right housings 8 and 9 are connected to the outside of each unit.

[0042] That is, the units 4, 5, and 6 are disposed on both sides of the spindle 2 along the lateral direction.

[0043] As described above, the seat belt retractor 1 of the related art is manufactured by combining components such as the spindle 3, the sensor unit 4, the emergency tensioning unit 5, and the pre-tensioning unit 6 in a complex structure.

[0044] Therefore, in the seat belt retractor 1 of the related art, a spindle 3 is installed between both side walls of a fixed frame, and one side of the webbing 2 is wound around the outer circumferential surface of the spindle 3 and the other side is pulled out upward.

[0045] In addition, in the seat belt retractor 1 of the related art, a spindle 3 is installed between both side walls of the fixed frame, and one side of the webbing 2 is wound around the outer circumferential surface of the spindle 3 and the other side is pulled out upward.

[0046] For this reason, in the seat belt retractor 1 of the related art, as the length of the webbing 2 wound around the spindle 3 increases, the volume in the front-rear direction inevitably increases.

[0047] Recently, seats installed in vehicles have been made slim by designing the thickness of the backrest in the front-to-rear direction (hereinafter referred to as "thickness") to be thin. In addition, seats may be integrated into the seat by applying an integrated seat belt (Belt In Seat (BIS)).

[0048] In particular, seats for autonomous vehicles are being developed that can rotate left and right and have backrests that can be rotated backwards up to 180 degrees.

[0049] As described above, in order to install the seat belt retractor 1 on a slim seat, the width in the front-rear direction of the seat, particularly the seat belt retractor 1 attached to the backrest, must be minimized.

[0050] However, in the seat belt retractor 1 of the related art, the spindle 3 is installed between both side walls of the fixed frame 7 and is mounted so as to face in the same direction as the rotation axis of the seat back.

[0051] For this reason, the width of the seat belt retractor 1 of the related art in the fore-and-aft direction increases according to the length of the webbing 2 wound around the outer peripheral surface, which causes a problem in that it is difficult to apply the seat belt retractor 1 of the related art to the backrest of a slim seat.

[0052] In order to solve such problems, the present disclosure modularizes each component applied to a seat belt retractor into functional blocks, and manufactures a seat belt retractor by selectively combining modules corresponding to required functions.

[0053] Additionally, the present disclosure minimizes the width of the seat belt retractor in the front-to-rear direction by changing the direction in which the spindle around which the webbing is wound is installed, thereby slimming down the seat belt retractor.

[0054] The configuration of a seat belt retractor according to a preferred embodiment of the present disclosure will be described in detail below with reference to FIGS.

[0055] Fig. 2 is an exploded perspective view of a seat belt retractor according to a preferred embodiment of the present disclosure, and Fig. 3 is a perspective view showing the assembled state of the modules shown in Fig. 2. Figs. 4 and 5 are views showing the assembled state of the modules shown in Fig. 2 in different ways.

[0056] As shown in Figures 2 and 3, the seat belt retractor 10 according to a preferred embodiment of the present disclosure can be manufactured by modularizing each device, such as the spindle 3, the sensor unit 4, the emergency tensioning unit 5, and the pre-tensioning unit 6 described with reference to Figure 1, into functional blocks, and can be assembled by selectively combining the required modules.

[0057] That is, the seat belt retractor 10 according to the preferred embodiment of the present disclosure is manufactured by modularizing each component applied to the seat belt retractor 10 into functional blocks and selectively combining each modularized component.

[0058] For example, the seat belt retractor 10 may 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.

[0059] The spindle module 20 and the sensor module 30 are basic modules that make up the seat belt retractor 10, and as shown in FIG. 2, they may be manufactured and assembled as separate modules, or may be provided as a single integrated module.

[0060] The sensor module 30 may include an acceleration sensor that detects a change in the acceleration of the unwinding of the webbing 21, or an inclination sensor that detects a change in the inclination of the vehicle.

[0061] The spindle module 20 includes a spindle 22 around which a webbing 21 is wound.

[0062] The spindle module 20 may operate to retract the webbing 21 when the unwinding acceleration of the webbing 21 or the inclination of the vehicle changes due to a vehicle collision.

[0063] The spindle module 20 can further provide the function of retracting a predetermined section of the webbing to secure the child seat.

[0064] In the following description, the direction in which the webbing 21 is pulled out is referred to as an upward direction (U), and the direction in which the spindle 22 is attached is referred to as a front-rear direction (F, B).

[0065] In this embodiment, the thickness of the seat belt retractor 10, that is, the width in the front-rear direction, is minimized, making it possible to attach the seat belt retractor 10 to a slim seat.

[0066] For example, each module in this embodiment may be manufactured to have the same thickness of approximately 40 mm to 90 mm, or other modules may be manufactured to have a thickness thinner than spindle module 20, based on the thickness of spindle module 20.

[0067] In addition, each module is disposed on a side of the spindle module 20 with respect to the center of the spindle module 20, that is, on the right or left side, or on the top or bottom of the spindle module 20.

[0068] That is, as shown in Figures 2 and 3, the pre-tensioning module 50 may be disposed on the left side of the spindle module 20, and the sensor module 30 and the emergency tensioning module 40 may be disposed alternately on the right side of the spindle module 20.

[0069] Of course, the present disclosure is not limited in this respect.

[0070] For example, as shown in FIG. 4, the sensor module 30 and the emergency tensioning module 40 may be disposed on the right side of the spindle module 20, and the pre-tensioning module 50 may be disposed below the spindle module 20.

[0071] Alternatively, as shown in FIG. 5, the pretensioning module 50 may be disposed on the left or right side of the spindle module 20, and the sensor module 30 and emergency tensioning module 40 may be disposed below the spindle module 20 and pretensioning module 50.

[0072] In this embodiment, depending on the specifications of the vehicle and the specifications of the seat belt retractor 10, if necessary, some of the above-mentioned modules can be omitted or additional functional modules can be further combined and assembled.

[0073] In this embodiment, the modules other than the spindle module 20 are manufactured to the same thickness as the spindle module 20 or to a thickness thinner than the spindle module 20, thereby making it possible to maintain a constant width in the fore-and-aft direction of the seat belt retractor 10 attached to the seat back.

[0074] Therefore, by manufacturing each module of the seat belt retractor 10 to a minimum thickness and arranging the other modules on either side, above, or below the spindle module 20 based on the center of the spindle module 20, the total volume of the seat belt retractor 10 can be minimized and it can be manufactured slim.

[0075] The modules combined as described above can be arranged in parallel or vertical directions so that the axes of the modules face in the same direction, for example, the front-to-rear direction.

[0076] Thus, each module may be configured to transmit or receive power sequentially using a power transmission unit such as a gear, chain, belt, or the like.

[0077] In Figures 2 to 5, each module is shown schematically as having a substantially hexahedral shape, but in the present disclosure, the shape of each module can be varied in various ways depending on its function or configuration, and the modules can be selectively combined to produce a seat belt retractor.

[0078] For example, FIG. 6 is a perspective view showing the spindle module and the sensor module shown in FIG. 2 in detail, and FIG. 7 is a perspective view showing the spindle module and the sensor module shown in FIG. 6 from a different angle.

[0079] The spindle module 20 and the sensor module 30 are basic modules that make up the seat belt retractor 10, and may be provided integrated into one module as shown in Figures 6 and 7, or may be manufactured into separate modules and assembled.

[0080] Additionally, the emergency tensioning module 40 and the pre-tensioning module 50 may be disposed on one side of the base module, for example on the left side.

[0081] Each of the modules combined as described above is installed so that the axis provided in each module faces the same direction as the installation direction of the spindle 22, and is configured to transmit or receive power via a power transmission unit such as a gear.

[0082] The spindle module 20 is provided with a spindle 22 on which the webbing 21 is wound.

[0083] As shown in FIGS. 6 and 7, the spindle 22 is disposed in the housing 23 along the front-rear direction, and the webbing 21 is wound around the outer peripheral surface of the spindle 22.

[0084] A guide portion 24 is provided on the upper portion of the housing 23 to guide the webbing 21 so that the unwinding direction of the webbing 21 is changed to a direction different from the front-to-rear direction in which the spindle 22 is installed, for example, a vertical direction, i.e., a left-to-right direction.

[0085] Each guide portion 24 may include a pair of guide frames 25 spaced a predetermined distance apart to form a pull-out space 251 through which the webbing is pulled out, and connecting members 26 that connect both ends of the pair of guide frames 25 to the housing 23.

[0086] The pair of guide frames 25 may be provided in a straight or curved shape, or in a plate shape.

[0087] Naturally, the guide frame 25 may be changed to a rectangular frame shape, a circular frame shape, or an elliptical frame shape with the drawer space 251 formed in the center thereof.

[0088] One or more connecting members 26 may be provided to connect opposite ends of the guide frame 25 to the housing 23, respectively.

[0089] Therefore, the guide portion 24 may be formed so that the cross section when viewed from the front is substantially in the shape of a "┐".

[0090] Naturally, the shape of the guide portion 24 is not limited to this, and the cross section of the guide portion may be changed to various shapes such as a substantially "∩" shape, a "∧" shape, an arc shape, etc., depending on various conditions such as the appearance of the housing 23, the installation position of the guide portion 24, and the shape of its surroundings.

[0091] In addition, the guide portion 24 is disposed perpendicular to the installation direction of the spindle 22 .

[0092] As a result, one end of the webbing 21 is wound around the outer peripheral surface of the spindle 22, and the other end of the webbing 21 is pulled out to the outside of the housing 23, and then pulled out again upward through the pull-out space 251 between the pair of guide frames 25.

[0093] In this case, the webbing 21 is arranged so that it faces the front-to-rear direction when it is pulled out to the outside of the housing 23, and when it is pulled out through the pull-out space 251 between the pair of guide frames 25, it is rotated to one side and pulled out along the left-to-right direction.

[0094] As described above, according to the present disclosure, by changing the arrangement direction of the spindle around which the webbing is wound, it is possible to minimize the width in the front-to-rear direction when the seat belt retractor is attached to the seat backrest.

[0095] In addition, the present disclosure minimizes the width of the spindle module in the front-to-rear direction, thereby minimizing the width at which the spindle module and the seat belt retractor to which it is applied are attached to the seat, thereby making it possible to manufacture a slim seat belt retractor.

[0096] Hereinafter, the configuration of a seat belt retractor according to another embodiment of the present disclosure will be described in detail with reference to FIGS.

[0097] Fig. 8 is a rear view of a seat belt retractor according to another embodiment of the present disclosure, Fig. 9 is a perspective view of the seat belt retractor shown in Fig. 8, and Fig. 10 is a diagram showing a state in which the seat belt retractor shown in Fig. 8 is attached to the backrest of a seat. Fig. 10(a) shows the front of the seat, and Fig. 10(b) shows the rear of the seat.

[0098] 8-10, a seat belt retractor 10 according to another embodiment of the present disclosure is similar in configuration to the seat belt retractor 10 described above with reference to Figures 6 and 7. However, the emergency tensioning module 40 and the pre-tensioning module 50 are coupled to the top of the spindle module 20.

[0099] That is, the seat belt retractor 10 according to another embodiment of the present disclosure can be manufactured by modularizing each component applied to the seat belt retractor 10 into functional blocks and selectively combining each of the modularized components.

[0100] Additionally, the spindle module 20 includes a spindle 22 around which the webbing 21 is wound.

[0101] The spindle module 20 may operate to retract the webbing 21 when the unwinding acceleration of the webbing 21 or the inclination of the vehicle changes due to a vehicle collision.

[0102] The spindle module 20 can further provide a function of retracting the webbing 21 by a predetermined section to secure the child seat.

[0103] In the following description, the direction in which the webbing 21 is pulled out is referred to as an upward direction (U), and the direction in which the spindle 22 is installed is referred to as a front-rear direction (F, B).

[0104] In this embodiment, the thickness of the seat belt retractor 10, that is, the width in the front-rear direction, is minimized, making it possible to mount the seat belt retractor on a slim seat.

[0105] Each module is disposed on a side of the spindle module 20 with respect to the center of the spindle module 20 , that is, on the left or right side, top or bottom of the spindle module 20 .

[0106] 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 each be disposed above the spindle module 20.

[0107] In this specification, the spindle module 20 and the sensor module 30 are basic modules that make up the seat belt retractor 10, and may be provided integrated into one module or may be manufactured and assembled into separate modules.

[0108] Additionally, the emergency tensioning module 40 and the pre-tensioning module 50 may be located on one side of the base module, for example, on top.

[0109] Each of the modules combined as described above is installed vertically parallel so that the axis provided in each module faces the same direction as the installation direction of the spindle 22, and is configured to transmit or receive power via a power transmission unit such as a gear.

[0110] For example, the axes provided to the emergency tensioning module 40 and the pretensioning module 50 may be arranged parallel to the spindle 22, and the output axis of the drive motor provided to the pretensioning module 50 and the axis provided to the sensor module 30 may be arranged along the left-right direction so as to be perpendicular to the spindle 22.

[0111] A first bracket 27 and a second bracket 28 , which are coupled to each other to perform the function of the housing 23 , may be coupled to the front and rear sides of the spindle module 20 .

[0112] That is, the first bracket 27 may be disposed on the front side of the spindle module 20, and the second bracket 28 may be disposed on the rear side of the spindle module 28. In addition, both sides of the first bracket 27 and the second bracket 28 may be provided with connecting members that connect them to each other, and the lower ends of the first bracket 27 and the second bracket 28 may be provided with mounting members that are mounted on the backrest 12.

[0113] Accordingly, a pull-out space 251 may be provided on one side of the first bracket 27 and the second bracket 28, for example, on the lower end on the left side in FIG. 8 , to enable the webbing 21 to be pulled out. A guide member 29 may be installed in the pull-out space 251 along the same front-rear direction as the spindle 22.

[0114] The guide member 29 functions to guide the upward withdrawal of the webbing 22. The guide member 29 may be provided as a roller whose front end and rear end are rotatably and axially coupled to the first bracket 27 and the second bracket 28, respectively, so as to enable the webbing 21 to be smoothly wound onto or unwound from the spindle 22.

[0115] Therefore, the overall width of the seat belt retractor 10 in the front-rear direction can be limited to the width of the first bracket 27 and the second bracket 28 in the front-rear direction.

[0116] Meanwhile, a seat back 12 of the seat 11 may be provided with a mounting space 13 in which the seat belt retractor 10 is mounted.

[0117] A mounting space 13 may be provided inside the backrest 12, and a webbing guide 14 is provided on one side of the mounting space 13 to guide the webbing pulled out from the spindle module 20 to the outside of the backrest 12.

[0118] The mounting space 13 may be provided at the upper rear portion of the backrest 12 .

[0119] 10, the mounting space 13 is disposed at the center of the upper end of the backrest 12, but the present disclosure is not limited thereto. The mounting space 13 may be formed at a position spaced a predetermined distance downward from the upper end of the backrest 12, or may be formed offset to the left or right side of the center of the backrest 12.

[0120] The space in which the webbing 21 is disposed toward the webbing guide 14 may be in fluid communication with one side of the mounting space 13 .

[0121] When the webbing guide 14 is applied to the upper end of one side of the backrest 12, for example, the driver's seat 11, the webbing guide 14 may be provided to partially cover the upper part of the left side of the backrest 12 and the right edge of the upper surface.

[0122] In this specification, the webbing 21 is pulled out to the outside of the backrest 12 through the mounting space 13 and the arrangement space 15 while being wound around the spindle 22 so that both ends of the webbing 21 face in the front-to-rear direction, and the pulling direction of the webbing 21 may be changed by the webbing guide 14 so that both ends of the webbing 21 face substantially in the left-to-right direction.

[0123] That is, the direction in which the webbing 21 is pulled out is changed so that both ends in the front-rear direction disposed between the spindle 22 and the webbing guide 14, i.e., in the arrangement space 15, face in the left-right direction.

[0124] Accordingly, the angle at which the webbing 21 is pulled out may be adjusted depending on the position of the webbing guide 14.

[0125] For example, Figures 11 and 12 are operational state diagrams showing states in which the unwinding angle of the webbing is adjusted. Figures 11 and 12(a) each show the front side of the seat, and Figures 11 and 12(b) each show the rear side of the seat.

[0126] When the occupant seated in the driver's seat 11 is an adult, the webbing 21 is disposed on one side of the seat back 12, with the upper end on the left side facing upward as viewed in Figure 10, as shown in Figure 10. That is, one end of the webbing 21 is wound around the outer peripheral surface of the spindle 22, and the other end of the webbing 21 is pulled out to the outside of the seat belt retractor 10 and then pulled upward toward the webbing guide 14 installed on the seat back 12.

[0127] On the other hand, as shown in Figures 11 and 12, when the occupant seated on the seat 11 is a woman, a young person, or a child whose build is smaller than that of an adult, the angle at which the webbing 21 is pulled out may be adjusted so that the webbing 21 is pulled out from a position shifted downward from the upper end of the left side of the backrest 12.

[0128] For example, when an occupant rotates the backrest rearward to adjust the angle of the backrest, the webbing may get caught on the occupant's neck or shoulder, causing inconvenience.

[0129] In addition, it may be necessary to adjust the angle at which the webbing 21 is unwound depending on the physical condition of the occupant, i.e., whether an adult, adolescent, or child is riding, the occupant's body type, or the purpose of use, such as when a child seat is installed.

[0130] Therefore, an adjustment member (not shown) may be installed on the webbing guide 14 so that it can move within a preset range from the top surface of the backrest 12 to the upper left side surface, and the webbing 21 may be rotated around the guide member 29 according to the position of the adjustment member to adjust the pull-out angle.

[0131] As described above, according to the present disclosure, the webbing wound around the spindle is pulled out from one side of the first bracket and the second bracket, and the pull-out angle of the webbing is freely adjusted within the mounting space of the backrest.

[0132] Therefore, according to the present disclosure, the unwinding direction and unwinding angle of the webbing can be adjusted according to the physical condition of the occupant or the purpose of use, thereby improving stability.

[0133] In this case, the webbing 21 is arranged so that both ends face in the front-to-rear direction when it is pulled out to the outside of the spindle module 20, and the webbing 21 is rotated to one side when it is pulled out through the arrangement space 15 and the webbing guide 14, and is pulled out so that both ends face in the left-to-right direction.

[0134] As described above, the present disclosure makes it possible to minimize the width of the seat belt retractor in the fore-and-aft direction when the seat belt retractor is attached to the seat backrest by changing the arrangement direction of the spindle around which the webbing is wound.

[0135] In addition, the seat belt retractor of the present disclosure can be manufactured slim by minimizing the thickness of the spindle module and the width of the webbing, thereby minimizing the width at which the spindle module and the seat belt retractor to which it is applied are attached to the seat.

[0136] In addition, the present disclosure allows the direction and angle of the webbing pulled out from the spindle module to be freely adjusted.

[0137] Although the present disclosure by the inventors has been specifically described based on the above embodiments, the present disclosure is not limited to the above embodiments and can be modified in various ways within the scope of the technical essence of the present disclosure.

[0138] That is, in the above-described embodiment, a seat belt retractor is produced by selectively combining a spindle module, a sensor module, an emergency tensioning module, and a pre-tensioning module, but in the present disclosure, a seat belt retractor can also be produced by selectively combining modules having additional functions in addition to the aforementioned modules.

[0139] In addition, in the above-described embodiment, an example was given in which the arrangement direction of the spindle and the pull-out direction of the webbing form a right angle, but the present disclosure is not limited to this, and the arrangement direction of the spindle and the pull-out direction of the webbing may be changed to form an angle other than a right angle, such as an acute angle or an obtuse angle, depending on the surrounding conditions in which the spindle is installed.

[0140] Although the present disclosure by the inventors has been specifically described based on the above embodiments, the present disclosure is not limited to the above embodiments and can be modified in various ways within the scope of the technical essence of the present disclosure. [Industrial Applicability]

[0141] The present disclosure is applicable to a seat belt retractor technology in which each component applied to a seat belt retractor is modularized into functional blocks, modules corresponding to required functions are selectively combined to manufacture a seat belt retractor, and the direction in which a spindle on which a webbing is wound is rotated to install the spindle, thereby minimizing the width in the front-to-rear direction of the seat belt retractor attached to the seat backrest, thereby slimming the seat belt retractor.

Claims

1. A seat belt retractor that is mounted in a mounting space formed in a backrest of a seat installed in a vehicle, a spindle module including a webbing and a spindle on which the webbing is wound; a sensor module for detecting the inclination of the vehicle; an emergency tensioning module that retracts the webbing to reduce slack during a vehicle collision; and a pre-tensioning module that reduces slack by winding up the webbing immediately before a collision of the vehicle; and each module being selectively coupled to said spindle module; The spindle is disposed in the mounting space along a front-rear direction of the vehicle, which corresponds to a thickness direction of the seat back.

2. the spindle module further includes a first bracket and a second bracket disposed on a front side and a rear side of the spindle, respectively; a width of the seat belt retractor in the front-rear direction is limited to a width of the first bracket and the second bracket in the front-rear direction; 2. The seat belt retractor according to claim 1.

3. The webbing is pulled out in a direction different from the installation direction of the spindle in the backrest.

2. The seat belt retractor according to claim 1.

4. The webbing is configured to have a pull-out direction and a pull-out angle, and the pull-out direction and the pull-out angle are adjusted between the mounting space and a webbing guide installed in the seat back.

2. The seat belt retractor according to claim 1.

5. The webbing guide is arranged to partially cover an upper end of one side of the backrest and an edge of an upper surface of the backrest, The webbing is configured so that the withdrawal angle is adjusted according to the position of an adjustment member movably installed on the webbing guide.

5. The seat belt retractor according to claim 4.

6. Both ends of the webbing pulled out from the spindle module in the longitudinal direction of the vehicle are rotated so as to face the left-right direction of the vehicle in an arrangement space formed between the mounting space and the webbing guide, thereby changing the pulling-out direction of the webbing.

5. The seat belt retractor according to claim 4.

7. a pull-out space from which the webbing wound around the spindle is pulled out is formed on one side of the first bracket and the second bracket, A guide member that guides the webbing so that it is wound onto or released from the spindle is installed in the pull-out space, a front end and a rear end of the guide member are rotatably and axially coupled to the first bracket and the second bracket, respectively; 3. The seat belt retractor according to claim 2.

8. The modules other than the spindle module are disposed on at least one of both sides, upper and lower sides of the spindle module. A seat belt retractor according to any one of claims 1 to 7.

9. In the modules combined to be applied to the seat belt retractor, the axis provided in each module is arranged parallel or perpendicular to the installation direction of the spindle, Each axis transmits or receives power continuously by using a power transmission unit; 9. The seat belt retractor according to claim 8.

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