Seat belt retractor

Abstract

This invention relates to a seatbelt retractor, which is installed in an installation space and includes a spindle module formed on a seat back in a vehicle. The spindle module includes a webbing and a spindle on which the webbing is wound. The spindle is positioned in the installation space along the longitudinal direction of the vehicle, corresponding to the thickness direction of the seat back, such that by rotating the installation direction of the spindle on which the webbing is wound, the longitudinal width installed on the seat back can be minimized, thereby making the retractor thinner.

Description

Technical Field

[0001] This disclosure relates to a seatbelt retractor, and more specifically, to a seatbelt retractor that prevents the seatbelt from releasing in the event of a vehicle collision. Background Technology

[0002] Generally speaking, vehicles are equipped with seat belts to ensure the safety of occupants.

[0003] The seatbelt safety device includes: a retractor that operates to allow a strip of seatbelt webbing (hereinafter referred to as "webbing") for securing an occupant to be wound around or pulled out of a reel; and a buckle, into which a tongue fixed at one end of the webbing is removably inserted.

[0004] When a vehicle comes to a sudden stop or accelerates due to a vehicle accident, the retractor prevents a seatbelt-wearing occupant from being thrown forward or displaced from their seat due to driving inertia. Such a retractor may include: a device that allows the webbing to be pulled out under normal conditions when the occupant is wearing a seatbelt, but prevents further pulling out of the webbing when a change in the webbing's pull-out acceleration is detected due to a vehicle collision or the vehicle's tilt; and an emergency tensioning device and a pretensioning device that reduce webbing slack or suspension (i.e., webbing looseness).

[0005] For example, Patent Document 1 and Patent Document 2 disclose a retractor technology for controlling the winding and unwinding operations of seat belt webbing.

[0006] At the same time, when an acceleration exceeding a predetermined value is applied to the seat belt retractor in the horizontal direction, or when the vehicle's tilt changes, such as in the event of a vehicle collision, vehicle sensors that detect acceleration or tilt are applied to prevent the webbing from being pulled out by operating the seat belt locking device.

[0007] Vehicle sensors that use a ball as an inertial component or use an independent inertial component are well known in the art.

[0008] For example, a vehicle sensor includes an inertial member and a sensor rod that moves in dangerous situations where the vehicle is subjected to deceleration or tilt that is higher than the normal deceleration of the webbing. The sensor rod interacts with the external teeth of a control disc that is moved by the inertial member and rotates together with the reel of the seatbelt retractor.

[0009] These seatbelt retractors can be installed on the vehicle body, such as the center pillar, seat back, and rear pillar. Therefore, the installation posture of the seatbelt retractor can be varied depending on the structure of the center pillar, seat back, and rear pillar. That is, the seatbelt retractor is not always installed horizontally; it can also be installed at a predetermined angle from the horizontal position in the left-right or front-back directions.

[0010] In particular, when the seat belt retractor is installed in the seat back, the tilt of the seat belt retractor can be changed according to the rotation of the seat back.

[0011] However, if the posture of the seatbelt retractor in the relevant technology changes within a certain range, it cannot accurately detect acceleration and tilt.

[0012] For example, when a retractor with a vehicle sensor has a tilted posture within a certain range from a horizontal position, the distance between the control panel of the vehicle sensor and the sensor rod becomes too close, so the sensor rod is too sensitive to operate, making it impossible to perform the locking operation correctly.

[0013] Additionally, when the retractor with the vehicle sensor is mounted on the seat back and the seat back is tilted towards the front of the vehicle, the sensor rod of the vehicle sensor is captured by the external teeth of the control disc, thereby limiting the rotation of the retractor.

[0014] Therefore, when occupants want to fasten their seat belts, they may be unable to do so because the rotation of the reel is restricted.

[0015] To address the aforementioned problems, the applicant of this invention has filed a patent application disclosing a seatbelt retractor configuration that includes a vehicle sensor having the improved fixing structure described in Patent Document 3, which is now registered below.

[0016] Meanwhile, with the recent development of autonomous vehicles, technologies are being developed to minimize the size of seats and seatbelt retractors used in vehicles. Specifically, seats are becoming thinner by designing backrests with a thinner profile.

[0017] In existing seat belt retractors, the rotation axis of the spindle on which the webbing is wound is set in the same direction as the rotation axis of the backrest. Therefore, the total volume increases with the number of times the webbing is wound on the spindle, and there are limitations in reducing the width of the seat belt retractor corresponding to the backrest in the front-back direction.

[0018] Furthermore, existing seatbelt retractors are configured by assembling multiple components, resulting in a complex structure. When any single component fails or is damaged, the entire retractor needs to be replaced because it is not possible to repair only that component.

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

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

[0021] (Patent Document 3) Korean Patent Registration No. 10-1766844 (published on August 9, 2017) Summary of the Invention

[0022] Technical issues

[0023] One object of this disclosure is to solve the above-mentioned problems and to provide a seat belt retractor that safely protects occupants by securing them in the event of a vehicle collision.

[0024] Another object of this disclosure is to provide a seatbelt retractor for use in a slim seat manufactured by reducing the thickness of the backrest.

[0025] Another object of this disclosure is to provide a seatbelt retractor that is made by modularizing the various components according to functional blocks and selectively combining the various modules.

[0026] Solution to the problem

[0027] To achieve the above objectives, the seat belt retractor according to the present disclosure is installed in an installation space formed in a seat back installed in a vehicle, and the seat belt retractor includes a spindle module comprising a webbing and a spindle on which the webbing is wound on its outer surface, wherein the spindle is disposed in the installation space along the vehicle's fore-and-aft direction corresponding to the thickness direction of the seat back.

[0028] Advantages of the present invention

[0029] According to the above disclosure, the seat belt retractor has the effect of being thin by rotating the direction of the main shaft on which the webbing is wound and minimizing the width of the seat belt retractor installed in the seat back in the front-to-back direction.

[0030] That is, according to this disclosure, the following effects are achieved: by changing the orientation of the spindle on which the webbing is wound, the backrest is designed to have a thinner thickness, and the installation space required when applying the seat belt retractor to a slim seat is minimized.

[0031] In addition, according to this disclosure, the following effects are achieved: by modularizing the various components applied to the seat belt retractor according to the functional blocks, and selectively combining modules corresponding to the necessary functions for manufacturing.

[0032] Therefore, according to this disclosure, a seat belt retractor can be applied to recently developed slim seats and has the effect of integrating a seat belt into the seat.

[0033] Furthermore, according to this disclosure, it has the effect of freely adjusting the pulling direction and pulling angle of the webbing wound on the main shaft.

[0034] Therefore, according to this disclosure, safety can be improved by adjusting the direction and angle of the webbing pull-out according to the occupant's physical condition or intended use. Attached Figure Description

[0035] Figure 1 This is a diagram illustrating an example of a prior art seatbelt retractor;

[0036] Figure 2 This is an exploded perspective view of a seatbelt retractor according to a preferred embodiment of the present disclosure;

[0037] Figure 3 It shows that it has been assembled. Figure 2 A perspective view showing the status of each module;

[0038] Figure 4 and Figure 5 They are shown respectively Figure 2 The diagram shows the assembly states of the various modules in different methods;

[0039] Figure 6 It shows in detail Figure 2 A perspective view of the spindle module and sensor module shown;

[0040] Figure 7 Shown from different angles Figure 6 A perspective view of the spindle module and sensor module shown;

[0041] Figure 8 This is a rear view of a seatbelt retractor according to another embodiment of this disclosure;

[0042] Figure 9 yes Figure 8 A perspective view of the seatbelt retractor shown;

[0043] Figure 10 It is shown Figure 8 The diagram shows the seatbelt retractor installed in the seat back; and

[0044] Figure 11 and Figure 12 These are working state diagrams showing the adjustment of the webbing pull-out angle.

[0045] Best way to carry out the invention

[0046] In the following, a preferred embodiment of the seatbelt retractor according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0047] Before describing the configuration of the seatbelt retractor according to the preferred embodiment of this disclosure, reference will be made to... Figure 1 This section provides a general description of the configuration of seatbelt retractors based on existing technology.

[0048] Figure 1 This is a diagram illustrating an example of a prior art seatbelt retractor.

[0049] In the following text, the direction from the vehicle's seat toward the steering wheel will be referred to as 'forward direction (F)', and the opposite direction will be referred to as 'rearward direction (B)'. Additionally, terms indicating directions such as 'left (L)', 'right (R)', 'upward direction (U)', and 'downward direction (D)' are defined as indicating the corresponding directions relative to the aforementioned forward (F) and rearward (B) directions.

[0050] like Figure 1 As shown, a prior art seat belt retractor 1 may include: a main shaft 3 on which seat belt webbing (hereinafter referred to as "webbing") 2 is wound; a sensor unit 4 for detecting the tilt of the vehicle; an emergency tensioning unit 5 for reducing slack by winding the webbing 2 around the webbing 2 during a vehicle collision; and a pretensioning unit 6 for smoothly pulling out the webbing 2 during normal vehicle operation and reducing slack by winding the webbing 2 around the webbing 2 just before a vehicle collision.

[0051] Sensor unit 4 detects changes in the pull-out acceleration of the webbing caused by a vehicle collision or changes in the vehicle's tilt angle.

[0052] The emergency tensioning unit 5 can operate the inflator (not shown) embedded in the propellant based on the detection signal of a vehicle collision, and can use the pressure of the generated gas to wrap the webbing 2 around the main shaft 3. Therefore, the emergency tensioning unit 5 can reduce the slack of the webbing 2 by wrapping it around the webbing 2 during a vehicle collision, thereby reducing the injury value to the occupants.

[0053] When a vehicle collision is predicted by sensors applied to the vehicle, the pretensioning unit 6 can wind the webbing 2 onto the main shaft 3 by operating a motor capable of rotating in both directions. That is, when the vehicle is driving normally, even without an accident, the pretensioning unit 6 can maintain the tension of the attached webbing 2 and prevent the webbing 2 from slackening until the vehicle experiences stronger acceleration or deceleration. Furthermore, by winding the webbing 2 just before a collision, the slackening of the webbing 2 can be reduced, thereby reducing the injury level to the occupants.

[0054] In this paper, the main shaft 3 is installed inside the fixed frame 7, the sensor unit 4, the emergency tensioning unit 5 and the pretensioning unit 6 are arranged on both sides of the fixed frame 7, and the left housing 8 and the right housing 9 are coupled to the outside of each unit.

[0055] That is, each unit 4, 5, and 6 is arranged on both sides of the main shaft 2 along the horizontal direction.

[0056] As described above, the existing seat belt retractor 1 is made by coupling various components such as the main shaft 3, sensor unit 4, emergency tensioning unit 5, and pretensioning unit 6 together with each other in a complex structure.

[0057] Therefore, in the existing seat belt retractor 1, the main shaft 3 is installed between the two side walls of the fixed frame, and one side of the webbing 2 is wrapped around the outer surface of the main shaft 3, while the other side is pulled out in the upward direction.

[0058] In addition, in the existing seat belt retractor 1, the main shaft 3 is installed between the two side walls of the fixed frame, and one side of the webbing 2 is wrapped around the outer surface of the main shaft 3, while the other side is pulled out in the upward direction.

[0059] Therefore, as the length of the webbing 2 wound on the main shaft 3 increases, the volume of the prior art seat belt retractor 1 in the front-to-back direction inevitably increases.

[0060] Recently, by designing the backrest to be thinner in the fore-and-aft direction (hereinafter referred to as 'thickness'), seats installed in vehicles can be manufactured to be thinner. Additionally, integrated seat belts (BIS in-seat belts) can be integrated into the seat.

[0061] Specifically, a seat for autonomous vehicles is being developed that can rotate in the left and right directions and allows the backrest to rotate backward to a maximum angle of 180°.

[0062] As described above, in order to install the seat belt retractor 1 in a slim seat, the width of the seat belt retractor 1 installed in the seat, especially the backrest, in the fore-and-aft direction should be minimized.

[0063] However, in the existing seat belt retractor 1, the main shaft 3 is installed in the same direction as the rotation axis of the backrest, and is installed between the two side walls of the fixed frame 7.

[0064] Therefore, the width of the existing seat belt retractor 1 in the front-to-back direction increases according to the length of the webbing 2 wrapped around the outer surface. As a result, it is difficult to apply the existing seat belt retractor 1 to thin seat backs.

[0065] To address this problem, this disclosure modularizes the various components applied to the seatbelt retractor according to functional blocks, and manufactures the seatbelt retractor by selectively combining modules corresponding to necessary functions.

[0066] In addition, this disclosure minimizes the width of the seat belt retractor in the front-to-back direction by changing the installation direction of the webbing wound on it, thereby making the seat belt retractor thinner.

[0067] In the following text, reference will be made to Figures 2 to 5 The configuration of the seat belt retractor according to a preferred embodiment of this disclosure is described in detail.

[0068] Figure 2 This is an exploded perspective view of a seatbelt retractor according to a preferred embodiment of the present disclosure, and Figure 3 This shows the assembly. Figure 2 A perspective view showing the status of each module. Figure 4 and Figure 5 They are shown respectively Figure 2 The diagram shows the assembly states of the various modules in different methods.

[0069] like Figure 2 and Figure 3 As shown, the seatbelt retractor 10 according to a preferred embodiment of this disclosure can be configured to refer to a functional block. Figure 1 The various devices described, such as the spindle 3, sensor unit 4, emergency tensioning unit 5, and pretensioning unit 6, are manufactured in modular form and can be assembled by selectively combining the necessary modules.

[0070] That is, the seat belt retractor 10 according to the preferred embodiment of this disclosure is manufactured by modularizing the various components applied to the seat belt retractor 10 according to functional blocks, and selectively combining the modular components.

[0071] For example, the seat belt retractor 10 can be assembled by selectively combining the spindle module 20, sensor module 30, emergency tensioning module 40, pretensioning module 50, and additional function modules.

[0072] The spindle module 20 and sensor module 30 are the basic modules constituting the seatbelt retractor 10, and can be manufactured as separate modules as follows: Figure 2 It can be assembled as shown, or it can be set up as an integrated module.

[0073] The sensor module 30 may include an acceleration sensor that detects changes in the pulling acceleration of the webbing 21 or a tilt sensor that detects changes in the vehicle's tilt.

[0074] The spindle module 20 is provided with a spindle 22 on which a webbing 21 is wound around its outer surface.

[0075] When the pulling acceleration of the webbing 21 or the tilt of the vehicle changes due to a vehicle collision, the spindle module 20 can be operated to wind the webbing 21.

[0076] The spindle module 20 can also provide the function of pulling the webbing only in a predetermined section to secure the child seat.

[0077] In the following description, the pulling direction of the webbing 21 is set to the upward direction (U), and the mounting direction of the spindle 22 is set to the front-back direction (F, B).

[0078] In this embodiment, the thickness (i.e., the width in the front-to-back direction) of the seat belt retractor 10 is minimized to allow the seat belt retractor 10 to be installed in a slim seat.

[0079] For example, each module in this embodiment can be manufactured with the same thickness of about 40 mm to 90 mm, or, referring to the thickness of spindle module 20, other modules can be manufactured with a smaller thickness than spindle module 20.

[0080] In addition, each module is positioned relative to the center of the spindle module 20 on the side surface of the spindle module 20, that is, on the right or left side, or on the top or bottom of the spindle module 20.

[0081] That is, such as Figure 2 and Figure 3 As shown, the pre-tensioning module 50 can be located on the left side of the spindle module 20, and the sensor module 30 and the emergency tensioning module 40 can be located on the right side of the spindle module 20 in sequence.

[0082] Of course, this disclosure is not limited to this.

[0083] For example, such as Figure 4 As shown, the sensor module 30 and the emergency tensioning module 40 can be located on the right side of the spindle module 20, while the pretensioning module 50 can be located at the lower part of the spindle module 20.

[0084] Or, such as Figure 5 As shown, the pretensioning module 50 can be located on the left or right side of the spindle module 20, and the sensor module 30 and the emergency tensioning module 40 can be located at the lower part of the spindle module 20 and the pretensioning module 50.

[0085] In this embodiment, if necessary, some of the above-mentioned modules may be omitted or additional functional modules may be further combined and assembled according to the vehicle specifications and the specifications of the seat belt retractor 10.

[0086] In this embodiment, modules other than the main spindle module 20 are manufactured to have the same thickness as the main spindle module 20 or to have a smaller thickness than the main spindle module 20, so that the width of the seat belt retractor 10 installed in the seat back can remain constant in the front-to-back direction.

[0087] Therefore, by manufacturing each module of the seat belt retractor 10 with a minimum thickness and placing the other modules on either side, above, or below the center of the main shaft module 20, the overall volume of the seat belt retractor 10 can be minimized and it can be manufactured to be thin.

[0088] The modules assembled as described above can be arranged in parallel or perpendicular directions, such that the axes in each module face the same direction, for example, the front-to-back direction.

[0089] Therefore, each module can be configured to continuously transmit or receive power using power transmission units such as gears, chains, and belts.

[0090] Figures 2 to 5 Each module is schematically shown as having a generally hexahedral shape, but in this disclosure, the seat belt retractor can be manufactured by varying the shape of the individual modules and selectively combining them according to their function or configuration.

[0091] For example, Figure 6 It is shown in detail Figure 2 The diagram shows a perspective view of the spindle module and sensor module, and... Figure 7 Shown from different angles Figure 6 A perspective view of the spindle module and sensor module shown.

[0092] The spindle module 20 and the sensor module 30 are the basic modules that constitute the seat belt retractor 10, and can be integrated into a single module as follows: Figure 6 and Figure 7 The configuration shown can be either manufactured as a separate module or assembled.

[0093] Additionally, the emergency tensioning module 40 and the pretensioning module 50 can be located on one side of the basic module, for example, the left side.

[0094] The modules are assembled as described above, such that the shafts on each module are oriented in the same direction as the mounting direction of the main shaft 22, and are configured to transmit or receive power via a power transmission unit such as gears.

[0095] A spindle 22 with webbing 21 wound around it is set in the spindle module 20.

[0096] like Figure 6 and Figure 7 As shown, the main shaft 22 is arranged inside the housing 23 along the front-to-back direction, and a webbing 21 is wound on the outer surface of the main shaft 22.

[0097] The guide portion 24 is provided on the upper part of the housing 23 to guide the webbing 21, thereby changing the pull-out direction of the webbing 21 to a direction different from the front-back direction of the mounting spindle 22, for example, the vertical direction, i.e. the left-right direction.

[0098] The guide portion 24 may include a pair of guide frames 25 and a connecting member 26. The pair of guide frames are spaced apart from each other by a predetermined distance to form a pull-out space 251 through which the webbing is pulled out. The connecting member connects the two ends of the pair of guide frames 25 to the housing 23 respectively.

[0099] The guide frame 25 can be configured to be in the shape of a straight rod, a curved rod, or a plate.

[0100] Of course, the guide frame 25 can be changed to a rectangular frame shape or a circular or elliptical frame shape, with a pull-out space 251 formed in its center.

[0101] One or more connecting members 26 may be provided to connect the two ends of the guide frame 25 to the housing 23 respectively.

[0102] Therefore, the guiding part 24 can be formed to have a roughly " " shape when viewed from the front. "The cross-section of the shape."

[0103] Of course, the shape of the guide portion 24 is not limited to this, and the cross-section of the guide portion can be changed to various shapes according to various conditions (such as the appearance of the housing 23, the installation position of the guide portion 24 and the shape of its periphery), such as approximately “∩” or “∧”, or arc.

[0104] In addition, the guide section 24 is installed perpendicular to the spindle 22.

[0105] Therefore, one end of the webbing 21 is wrapped around the outer surface of the main shaft 22, and the other end of the webbing 21 is pulled out to the outside of the housing 23, and then pulled out again in the upward direction through the pull-out space 251 between the pair of guide frames 25.

[0106] In this configuration, the webbing 21 is positioned to face forward and backward when pulled out of the housing 23, and when pulled out through the pull-out space 251 between the pair of guide frames 25, the webbing rotates in one direction and is pulled out in the left and right direction.

[0107] As described above, when the seat belt retractor is installed in the seat back, this disclosure can minimize the width in the front-to-back direction by changing the orientation of the spindle on which the webbing is wound.

[0108] In addition, by minimizing the width of the spindle module in the front-to-back direction, this disclosure enables the manufacture of a slim seatbelt retractor by minimizing the width of the spindle module and the seatbelt retractor in which the spindle module is applied in the seat.

[0109] In the following text, reference will be made to Figures 8 to 10 The configuration of a seatbelt retractor according to another embodiment of this disclosure is described in detail.

[0110] Figure 8 This is a rear view of a seatbelt retractor according to another embodiment of this disclosure. Figure 9 yes Figure 8 The diagram shows a perspective view of the seatbelt retractor. Figure 10 It shows that Figure 8 The diagram shows the seatbelt retractor installed in the seat back. Figure 10 (a) shows the front of the seat. Figure 10 (b) shows the back of the seat.

[0111] like Figures 8 to 10 As shown, the configuration of the seatbelt retractor 10 according to another embodiment of this disclosure is similar to that described above. Figure 6 and Figure 7 The seatbelt retractor 10 is the same. However, the emergency tensioning module 40 and the pretensioning module 50 are coupled to the upper part of the spindle module 20.

[0112] That is, the seat belt retractor 10 according to another embodiment of the present disclosure can be manufactured by modularizing the various components applied to the seat belt retractor 10 according to functional blocks and selectively combining the modular components.

[0113] In addition, the spindle module 20 is provided with a spindle 22 on which the webbing 21 is wound around its outer surface.

[0114] When the pulling acceleration of the webbing 21 or the tilt of the vehicle changes due to a vehicle collision, the spindle module 20 can be operated to wind the webbing 21.

[0115] The spindle module 20 can also provide the function of pulling the webbing 21 only in a predetermined section to secure the child seat.

[0116] In the following description, the pulling direction of the webbing 21 is set to the upward direction (U), and the mounting direction of the spindle 22 is set to the front-back direction (F, B).

[0117] In this embodiment, the thickness (i.e., the width in the front-to-back direction) of the seat belt retractor 10 is minimized to allow the seat belt retractor to be installed in a slim seat.

[0118] Each module is positioned relative to the center of the spindle module 20 on the side surface of the spindle module 20, that is, on the left or right side, or on the top or bottom of the spindle module 20.

[0119] For example, such as Figure 8 and Figure 9 As shown, the sensor module 30, the emergency tensioning module 40, and the pretensioning module 50 can be respectively installed on the upper part of the spindle module 20.

[0120] In this document, the spindle module 20 and the sensor module 30 are the basic modules constituting the seat belt retractor 10, and can be integrated into a single module and set up, or can be manufactured as separate modules and assembled.

[0121] Additionally, the emergency tensioning module 40 and the pretensioning module 50 can be located on one side of the basic module, for example, at the top.

[0122] The modules assembled as described above are installed in parallel or perpendicular directions, such that the shafts provided on each module are oriented in the same direction as the mounting direction of the main shaft 22, and are configured to transmit or receive power via a power transmission unit such as gears.

[0123] For example, the shafts in the emergency tensioning module 40 and the pretensioning module 50 are respectively arranged parallel to the main shaft 22, and the output shaft of the drive motor in the pretensioning module 50 and the shaft in the sensor module 30 can be arranged in the left-right direction, thus perpendicular to the main shaft 22.

[0124] The first bracket 27 and the second bracket 28, which are coupled to each other to perform the function of the housing 23, can be coupled to the front and rear sides of the spindle module 20.

[0125] That is, the first bracket 27 can be disposed on the front side of the spindle module 20, and the second bracket 28 can be disposed on the rear side of the spindle module 28. In addition, coupling members that are coupled to each other can be disposed on both sides of the first bracket 27 and the second bracket 28, and mounting members are disposed at the lower ends of the first bracket 27 and the second bracket 28 for mounting on the backrest 12.

[0126] Meanwhile, the pull-out space 251 can be located on one side of the first bracket 27 and the second bracket 28, for example, when in Figure 8 When viewed from the center, it is positioned on the lower left side to allow the webbing 21 to be pulled out. The guide member 29 can be installed in the pull-out space 251 in the same front-back direction as the main shaft 22.

[0127] The guide member 29 is used to guide the webbing 22 to be pulled out in the upward direction. The guide member 29 can be configured as a roller, the front end and the rear end of which are rotatably coupled to the first bracket 27 and the second bracket 28, respectively, thereby allowing the webbing 21 to be smoothly wound on or pulled out from the main shaft 22.

[0128] Therefore, the entire width of the seat belt retractor 10 in the front-to-back direction can be limited to the width of the first bracket 27 and the second bracket 28 in the front-to-back direction.

[0129] Meanwhile, the installation space 13 can be set in the backrest 12 of the seat 11 so that the seat belt retractor 10 can be installed therein.

[0130] The mounting space 13 can be located inside the backrest 12, and the webbing guide 14 can be installed on one side of the mounting space 13 to guide the webbing from the spindle module 20 to the outside of the backrest 12.

[0131] The installation space 13 can be located on the upper part of the rear side of the backrest 12.

[0132] Figure 10 The installation space 13 is shown to be located at the center of the upper end of the backrest 12, but this disclosure is not limited thereto. The installation space 13 may be formed at a position spaced downwards from the upper end of the backrest 12 at a predetermined distance, or it may be formed to be offset to the left or right from the center of the backrest 12.

[0133] The space where the webbing 21 is disposed toward the webbing guide 14 can be in fluid communication with one side of the mounting space 13.

[0134] When the webbing guide 14 is applied to the upper end of one side of the backrest 12, for example, when applied to the driver's seat 11, the webbing guide 14 can be configured to partially cover the upper part of the left side surface and the right edge of the upper surface of the backrest 12.

[0135] In this document, the webbing 21 is pulled out to the outside of the backrest 12 through the mounting space 13 and the setting space 15. The two ends of the webbing 21 are wrapped around the main shaft 22 in the front-back direction, and the pulling direction of the webbing 21 can be changed by the webbing guide 14 so that the two ends of the webbing 21 are roughly in the left-right direction.

[0136] That is, the pulling direction of the webbing 21 is changed so that the two ends located between the main shaft 22 and the webbing guide 14 (i.e., the front-to-back direction within the setting space 15) are oriented to the left and right.

[0137] At the same time, the pull-out angle of the webbing 21 can be adjusted according to the position of the webbing guide 14.

[0138] For example, Figure 11 and Figure 12These are working state diagrams showing the adjustment of the webbing pull-out angle. Figure 11 and Figure 12 (a) shows the front of the seat, and Figure 11 and Figure 12 (b) shows the rear of the seat.

[0139] When the occupant sitting in the driver's seat 11 is an adult, the webbing 21 is set to face as shown. Figure 10 The backrest 12 shown is located on one side, the upper left side, or when... Figure 10 When viewed from the center, the webbing 21 is wound around the outer surface of the main shaft 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 mounted on the backrest 12.

[0140] On the other hand, such as Figure 11 and Figure 12 As shown, when the occupant sitting in seat 11 is a woman, a teenager, or a child smaller than an adult, the pull-out angle of the webbing 21 can be adjusted so that the webbing 21 is pulled out from the upper left side of the backrest 12 at a position that is offset downwards.

[0141] For example, when an occupant adjusts the backrest angle by turning it backward, the webbing may get caught on the occupant's neck or shoulders, causing inconvenience.

[0142] In addition, the pull-out angle of the webbing 21 needs to be adjusted according to the occupant's physical condition (i.e., when an adult, teenager, or child enters the vehicle) or according to the occupant's body type or the intended use, such as when a child seat is installed.

[0143] Therefore, the adjustment member (not shown) can be installed in the webbing guide 14 to be movable within a preset range from the upper surface of the backrest 12 to the upper part of the left side surface, and the webbing 21 can be rotated about the guide member 29, which serves as a rotation axis, according to the position of the adjustment member, thereby adjusting the pull-out angle.

[0144] According to the aforementioned disclosure, the webbing wound on the main shaft is pulled out through one side of the first and second supports, and the pulling angle of the webbing can be freely adjusted in the mounting space of the backrest.

[0145] Therefore, this disclosure can improve stability by adjusting the pull-out direction and pull-out angle of the webbing according to the occupant's physical condition or intended use.

[0146] In this case, when pulled out of the spindle module 20, the webbing 21 is configured such that its two ends face the front-back direction, and when pulled out through the setting space 15 and the webbing guide 14, the webbing 21 rotates to one side and is pulled out with its two ends set to face the left-right direction.

[0147] Through the above process, when the seat belt retractor is installed in the seat back, by changing the orientation of the spindle on which the webbing is wound, this disclosure can minimize the width of the seat belt retractor in the front-to-back direction.

[0148] Furthermore, by reducing and minimizing the thickness of the spindle module and the width of the webbing, the seatbelt retractor of this disclosure can be manufactured to be slim by minimizing the width of the spindle module and the seatbelt retractor with the spindle module installed in the seat.

[0149] In addition, this disclosure allows for free adjustment of the pulling direction and angle of the webbing pulled out from the spindle module.

[0150] Although the invention manufactured by the inventors of this application has been specifically described according to the above embodiments, this disclosure is not limited to the above embodiments and can be modified in various ways within the scope of the technical essence of this disclosure.

[0151] That is, in the above-described embodiments, a seat belt retractor is shown to be manufactured by selectively combining the spindle module, sensor module, emergency tensioning module, and pretensioning module. However, in this disclosure, a seat belt retractor can be manufactured by further selectively combining modules with additional functions in addition to the modules described above.

[0152] Furthermore, in the above embodiment, it is shown that the setting direction of the spindle and the pulling direction of the webbing form a right angle. However, this disclosure is not limited to this and can be changed so that the setting direction of the spindle and the pulling direction of the webbing form an angle other than a right angle, such as an acute angle or an obtuse angle, depending on the surrounding conditions of the mounting spindle.

[0153] Although the invention manufactured by the inventors of this application has been specifically described according to the above embodiments, this disclosure is not limited to the above embodiments and can be modified in various ways within the scope of the technical essence of this disclosure.

[0154] Industrial applicability

[0155] This disclosure applies to seat belt retractor technology, which modularizes the various components of the seat belt retractor according to functional blocks, manufactures the seat belt retractor by selectively combining modules corresponding to necessary functions, and makes the seat belt retractor thinner by rotating the mounting direction of the spindle wound with webbing and minimizing the width of the seat belt retractor installed in the seat back in the fore-and-aft direction.

Claims

1. A seatbelt retractor, the seatbelt retractor being installed in an installation space formed in a seat backrest installed in a vehicle, the seatbelt retractor comprising: The spindle module includes a webbing and a spindle on which the webbing is wound. The main shaft is arranged in the mounting space along the front-rear direction of the vehicle, corresponding to the thickness direction of the backrest, such that the rotation axis of the main shaft is parallel to the front-rear direction of the vehicle.

2. The seatbelt retractor according to claim 1, in, The spindle module also includes a first bracket and a second bracket respectively disposed on the front and rear sides of the spindle, and The width of the seatbelt retractor in the front-to-back direction is limited within the width of the first bracket and the second bracket in the front-to-back direction.

3. The seatbelt retractor according to claim 1, in, The webbing is pulled out in a direction different from the mounting direction of the main shaft in the backrest.

4. The seatbelt retractor according to claim 1, in, The webbing is configured to have an adjustable pull-out direction and pull-out angle between the mounting space and the webbing guide mounted in the backrest.

5. The seatbelt retractor according to claim 4, in, The webbing guide is configured to partially cover the upper end of one side of the backrest and the edge of the upper surface of the backrest, and The webbing is configured to adjust the pull-out angle according to the position of an adjusting member movably mounted on the webbing guide.

6. The seatbelt retractor according to claim 4, in, The two ends of the webbing pulled out from the main shaft module along the longitudinal direction of the vehicle rotate in the setting space formed between the mounting space and the webbing guide to face the lateral direction of the vehicle, thereby changing the pulling direction of the webbing.

7. The seatbelt retractor according to claim 2, in, A pull-out space is formed on one side of the first and second supports, and the webbing wrapped around the main shaft is pulled out into the pull-out space. A guide member is installed in the pull-out space to guide the webbing to wrap around or release from the main shaft, and The front and rear ends of the guide member are rotatably coupled to the first bracket and the second bracket, respectively.

8. The seatbelt retractor according to any one of claims 1 to 7, Also includes A sensor module that detects the vehicle's tilt angle. An emergency tensioning module reduces slack by wrapping the webbing around it during a vehicle collision; and A pretensioning module, which reduces slack by wrapping the webbing around the vehicle just before a collision, is modular in its function, and Each module is selectively combined with the spindle module.

9. The seatbelt retractor according to claim 8, in, The modules other than the spindle module are disposed on at least one of the two sides, the upper part, and the lower part of the spindle module.

10. The seatbelt retractor according to claim 9, in, In the modules assembled for use with the seatbelt retractor, the shafts in each module are arranged parallel or perpendicular to the mounting direction of the main shaft, and Each axis continuously transmits or receives power using a power transmission unit.

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