Frame, safety belt winding device, safety belt assembly and vehicle

Abstract

The embodiment of the utility model provides a frame, a safety belt winding device, a safety belt assembly and a vehicle, the frame comprises a first side plate, the first side plate is suitable for being connected with a shell of the safety belt winding device to form a storage cavity, and a boss is arranged on the side, close to the storage cavity, of the first side plate. The boss is arranged on the side, close to the containing cavity, of the first side plate, so that the structural strength of the first side plate is improved, and the overall impact resistance of the frame can be improved. Therefore, under the condition that the pre-tightening structure of the safety belt winding device is started, that is, at least part of the mass body enters the storage cavity, the frame can be effectively prevented from deforming, and the pre-tightening reliability of the safety belt winding device can be improved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular relates to a frame, a seat belt retracting device, a seat belt assembly and a vehicle. Background Art

[0002] During normal driving of the vehicle, there is a certain gap between the seat belt and the user. In order to quickly tighten the seat belt in an emergency situation in the vehicle to enhance the restraint of the seat belt on the user, the seat belt retractor is usually provided with a pre-tensioning structure.

[0003] In the prior art, the pre-tightening structure includes a transmission wheel and a plurality of mass bodies for driving the transmission wheel to rotate, wherein a recess for accommodating the mass bodies is provided on the periphery of the transmission wheel, and the transmission wheel is coaxially connected to the seat belt reel. When an emergency occurs in the vehicle, the plurality of mass bodies are accelerated and driven into the recess on the periphery of the transmission wheel, so that the transmission wheel rotates and drives the seat belt reel to rotate in the direction of the seat belt reeling, thereby realizing the pre-tightening of the seat belt. The seat belt reeling device also includes a frame and a shell, and a storage cavity is provided between the frame and the shell, and the storage cavity is connected to the pre-tightening structure. After pushing the transmission wheel to rotate a preset angle, the plurality of mass bodies will detach from the recess of the transmission wheel and enter the storage cavity in sequence for temporary storage. However, since the plurality of mass bodies entering the storage cavity have a large kinetic energy, they will cause a large impact on the frame at the corresponding position of the storage cavity during the mutual collision and extrusion process, causing the frame to be easily deformed, affecting the pre-tightening reliability of the seat belt. Utility Model Content

[0004] The present application aims to provide a frame, a seat belt retracting device, a seat belt assembly and a vehicle, so as to solve the problem that during the startup process of the existing pre-tensioning structure, the mass body will cause a large impact on the frame, causing the frame to be easily deformed.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application discloses a frame, which is applied to a seat belt retractor.

[0007] The frame comprises a first side plate, the first side plate is suitable for being connected to the housing of the safety belt retractor to form a storage cavity, and a boss is arranged on one side of the first side plate close to the storage cavity.

[0008] Optionally, the boss and the first side plate are an integrally formed structure.

[0009] Optionally, the boss protrudes from the first side plate toward the interior of the storage cavity.

[0010] Optionally, the frame includes a back panel and a second side panel;

[0011] The first side plate and the second side plate are arranged opposite to each other along a first direction, and the boss is arranged on a side of the first side plate away from the second side plate;

[0012] The back plate is disposed between the first side plate and the second side plate, and the back plate is connected to the first side plate and the second side plate respectively.

[0013] Optionally, the first side plate is provided with a first through hole, and the first through hole is suitable for allowing the reel of the seat belt retracting device to pass through;

[0014] The boss is disposed adjacent to the first through hole.

[0015] Optionally, the first side plate is further provided with a stopper, which is used to stop the mass body of the seat belt retracting device, and the stopper protrudes toward the inside of the storage cavity, and the stopper is located at the edge of the first through hole.

[0016] Optionally, at least part of the boss extends to the stop member.

[0017] Optionally, the boss is provided with reinforcing ribs on a side close to the receiving cavity and / or a side away from the receiving cavity.

[0018] In a second aspect, the present application further discloses a seat belt retracting device, the seat belt retracting device comprising:

[0019] A framework as described in any of the above;

[0020] A shell, wherein the shell is connected to the first side plate, and the storage cavity is formed between the shell and the first side plate;

[0021] And a pre-tightening structure, the pre-tightening structure includes a guide tube and a plurality of mass bodies, the plurality of mass bodies are slidably connected to the guide tube, and the guide tube is communicated with the receiving cavity.

[0022] Optionally, the guide tube comprises a first outlet, and when the pre-tightening structure is activated, at least part of the mass body is ejected from the first outlet;

[0023] The safety belt retracting device also includes a guide member;

[0024] The guide member is disposed on a side of the boss close to the shell, and is used to guide the mass body ejected from the first outlet so that the mass body enters the receiving cavity along a preset path.

[0025] In a third aspect, the present application further discloses a seat belt assembly, the seat belt assembly comprising:

[0026] The seat belt retractor as described in any one of the above items, wherein the seat belt retractor comprises a reel, and the reel is rotatably connected to the frame;

[0027] and a safety belt, wherein the safety belt is wound around the reel.

[0028] In a fourth aspect, the present application further discloses a vehicle, comprising the above-mentioned seat belt assembly.

[0029] In the embodiment of the present application, since the frame includes a first side plate, the first side plate is suitable for connecting with the housing of the seat belt retractor to form a storage chamber, and the first side plate is provided with a boss on the side close to the storage chamber. Since the first side plate is provided with a boss on the side close to the storage chamber, the structural strength of the first side plate is improved, thereby improving the overall impact resistance of the frame. In this way, when the pre-tightening structure of the seat belt retractor is activated, that is, when at least part of the mass body enters the storage chamber, deformation of the frame can be effectively avoided, which is beneficial to improving the pre-tightening reliability of the seat belt retractor.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 It is a structural schematic diagram of a framework provided in an embodiment of the present application;

[0033] Figure 2 It is a structural schematic diagram of a seat belt retracting device provided in an embodiment of the present application;

[0034] Figure 3 is a structural schematic diagram of a seat belt retracting device provided in an embodiment of the present application, in which a pre-tightening structure is not activated;

[0035] Figure 4 It is a structural schematic diagram of a pre-tensioning structure of a seat belt retracting device provided in an embodiment of the present application after activation.

[0036] Figure markings: 1. Frame, 11. Back plate, 12. First side plate, 121. First through hole, 13. Second side plate, 131. Second through hole, 14. Connecting plate, 2. Shell, 3. Boss, 4. Guide, 5. Arc channel, 51. Stopper, 6. Guide tube, 7. Mass body, 8. Transmission wheel, 81. Recess, 9. Reel, X. First direction. DETAILED DESCRIPTION

[0037] The embodiments of the utility model will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] An embodiment of the present application provides a seat belt retracting device, which is described in detail below with reference to the accompanying drawings.

[0042] Reference Figure 1 , showing a schematic diagram of a structure of a framework provided in an embodiment of the present application, referring to Figure 2 , showing a schematic diagram of the structure of a seat belt retracting device provided in an embodiment of the present application, referring to Figure 3, showing a schematic diagram of a structure in which the pre-tightening structure of a seat belt retracting device provided in an embodiment of the present application is not activated, referring to Figure 4 , shows a schematic structural diagram of a pre-tensioning structure of a seat belt retracting device provided in an embodiment of the present application after activation.

[0043] like Figure 1 As shown, the present application provides a frame 1, which is applied to a seat belt retractor. The frame 1 includes a first side plate 12, which is suitable for connecting with a housing 2 of the seat belt retractor to form a storage cavity. The first side plate 12 is provided with a boss 3 on one side close to the storage cavity.

[0044] In the embodiment of the present application, since the first side plate 12 is provided with a boss 3 on the side close to the storage cavity, the structural strength of the first side plate 12 is improved, thereby improving the overall impact resistance of the frame 1. In this way, when the pre-tightening structure of the seat belt retractor is activated, that is, when at least part of the mass body 7 enters the storage cavity, the deformation of the frame 1 can be effectively avoided, which is conducive to improving the pre-tightening reliability of the seat belt retractor.

[0045] In practical applications, such as Figure 2 As shown, the seat belt retracting device also includes a pre-tensioning structure and a reel 9, the pre-tensioning structure is fixedly connected to the frame 1, and the reel 9 is rotatably connected to the frame 1, and the reel 9 is used to reel up the seat belt, wherein the axial direction of the reel 9 is the first direction X shown in the figure.

[0046] Specifically, the pre-tightening structure includes a guide tube 6, a plurality of mass bodies 7 and a transmission wheel 8, wherein the plurality of mass bodies 7 are slidably connected to the guide tube 6, and the guide tube 6 is communicated with the storage chamber. The transmission wheel 8 is arranged between the frame 1 and the shell 2, and is fixedly connected to one end of the reel 9 close to the shell 2, wherein a plurality of recesses 81 are arranged on the periphery of the transmission wheel 8, and one recess 81 is cooperatively connected with one mass body 7, and the mass body 7 can be a metal ball. Along the extension direction of the guide tube 6, the guide tube 6 includes a first inlet and a first outlet which are arranged away from each other, and the first outlet is communicated with the storage chamber. As shown in FIG. Figure 3 to Figure 4 When the pre-tensioning structure is not activated, the mass body 7 is located in the guide tube 6; when the pre-tensioning structure is activated, at least part of the mass body 7 is ejected from the first outlet and is connected one-to-one with the recess 81 of the transmission wheel 8, thereby pushing the transmission wheel 8 to rotate at a preset angle and then disengage from the recess 81 and enter the storage chamber for temporary storage. During this process, the reel 9 fixedly connected to the transmission wheel 8 rotates in the winding direction of the seat belt, thereby realizing the pre-tensioning of the seat belt.

[0047] In practical applications, the pre-tensioning structure further includes a gas generator, which is disposed at the first inlet. When an emergency occurs in the vehicle, such as emergency braking or a collision, the gas generator is ignited, thereby generating high-pressure gas to cause the mass body 7 to be ejected from the first outlet and to be matched and connected with the recess 81 of the transmission wheel 8, so as to drive the transmission wheel 8 to rotate and drive the reel 9 to rotate in the reeling direction of the seat belt, so as to achieve pre-tensioning of the seat belt.

[0048] In some optional embodiments of the present application, the boss 3 and the first side plate 12 are integrally formed. That is, the boss 3 and the first side plate 12 do not need secondary processing, which is conducive to reducing manufacturing costs. In one embodiment, the boss 3 and the first side plate 12 are integrally formed by a sheet metal stamping die, so that the structural strength of the first side plate 12 can be improved without increasing the overall thickness of the first side plate 12, so that the overall impact resistance of the frame 1 is enhanced and deformation is effectively avoided.

[0049] In some optional embodiments of the present application, the boss 3 protrudes from the first side plate 12 toward the inside of the storage cavity. In this way, on the one hand, the boss 3 can reduce the height of the storage cavity along the first direction X, thereby limiting the movement of the mass body 7 along the first direction X to a certain extent, which is conducive to reducing the impact of the mass body 7 on the storage cavity caused by mutual collision or extrusion. On the other hand, compared with the flat plate structure, the boss 3 can enhance the structural strength of the first side plate 12, thereby effectively preventing the first side plate 12 from being deformed, which is conducive to improving the pre-tightening reliability of the seat belt retractor.

[0050] In some optional embodiments of the present application, the frame 1 also includes a back panel 11 and a second side panel 13; the first side panel 12 and the second side panel 13 are relatively arranged along the first direction X, and the boss 3 is arranged on the side of the first side panel 12 away from the second side panel 13; the back panel 11 is arranged between the first side panel 12 and the second side panel 13, and the back panel 11 is respectively connected to the first side panel 12 and the second side panel 13.

[0051] In the embodiment of the present application, since a back plate 11, a first side plate 12 and a second side plate 13 are provided, wherein the first side plate 12 and the second side plate 13 are arranged opposite to each other along the first direction X, the back plate 11 is arranged between the first side plate 12 and the second side plate 13, and is connected to the first side plate 12 and the second side plate 13 respectively. In this way, the back plate 11 and the first side plate 12 and the second side plate 13 can enclose a storage space for placing the reel 9. In one embodiment, the first side plate 12 and the second side plate 13 are arranged in parallel, and are respectively arranged perpendicular to the back plate 11.

[0052] In practical applications, the first side plate 12 is provided with a first through hole 121, and the second side plate 13 is provided with a second through hole 131 at a position corresponding to the first side plate 12. The reel 9 is passed through the first through hole 121 and the second through hole 131, so that the reel 9 is installed in the accommodation space surrounded by the back plate 11, the first side plate 12 and the second side plate 13. In addition, the frame 1 also includes a connecting plate 14, which is arranged on the side of the first side plate 12 and the second side plate 13 away from the back plate 11, and the connecting plate 14 is respectively connected to the first side plate 12 and the second side plate 13, so as to improve the overall structural stability of the frame 1, so that the reel 9 can be reliably installed on the frame 1. In one embodiment, two connecting plates 14 are provided, and the two connecting plates 14 are arranged at intervals.

[0053] In some optional embodiments of the present application, the first side plate 12 is provided with a first through hole 121, and the first through hole 121 is suitable for allowing the reel 9 of the safety belt retracting device to pass through; the boss 3 is arranged adjacent to the first through hole 121. In this way, since the boss 3 is arranged adjacent to the first through hole 121, the processing difficulty can be reduced, which is conducive to reducing the manufacturing cost.

[0054] In some optional embodiments of the present application, the first side plate 12 is further provided with a stopper 51, which is used to stop the mass body 7 of the seat belt retractor, and the stopper 51 is located at the edge of the first through hole 121, and the stopper 51 protrudes toward the inside of the storage cavity. In this way, since the stopper 51 is provided, the mass body 7 can be prevented from leaving the storage cavity and entering the recess 81 of the transmission wheel 8 again, so as to avoid affecting the normal operation of the pre-tightening structure.

[0055] It should be noted that, in one embodiment, the stopper 51 is a stopper plate, which extends toward the inside of the storage cavity, and can save space in the storage cavity while preventing the mass body 7 from leaving the storage cavity. In addition, the shell 2 can be provided with a groove at the corresponding position of the stopper plate, and when the shell 2 and the frame 1 are assembled, the end of the stopper plate away from the first side plate 12 is embedded in the groove, thereby improving the structural strength of the stopper plate, and preventing the mass body 7 from impacting and deforming the stopper plate, thereby affecting the normal operation of the preload structure.

[0056] In addition, in order to make the mass body 7 always move within the range of the boss 3 before colliding with the stopper 51, in some optional embodiments of the present application, at least a portion of the boss 3 extends to the stopper 51. In this way, the first side plate 12 can be effectively prevented from being deformed at positions other than the boss 3 due to mutual collision or extrusion of the mass body 7.

[0057] In some optional embodiments of the present application, the boss 3 is provided with reinforcing ribs (not shown) on the side close to the storage cavity and / or the side away from the storage cavity. In this way, the structural strength of the boss 3 can be further improved, which is conducive to improving the overall impact resistance of the frame 1. It can be understood that when the boss 3 protrudes from the first side plate 12 toward the inside of the storage cavity, the boss 3 forms a corresponding recessed portion on the side of the first side plate 12 away from the storage cavity. When the reinforcing ribs are provided in the recessed portion, other components of the safety belt retracting device will not be affected.

[0058] It should be noted that the embodiments of the present application do not limit the number of reinforcement ribs and the direction of extension, and those skilled in the art can make adjustments according to actual needs. In one embodiment, the storage cavity has an arc channel 5, which is used to guide the mass body 7 to move along a preset path and finally be temporarily stored in the arc channel 5, wherein the arc channel 5 has a first central axis, and the extension direction of the reinforcement rib is parallel to the first central axis. In this way, not only can the structural strength of the boss 3 be improved, but also the mass body 7 can be guided to move along a preset path, avoiding the mass body 7 from causing a large impact on the guide member 4 and the housing 2. In this case, a plurality of reinforcement ribs are provided, and the plurality of reinforcement ribs are spaced apart in a direction perpendicular to the first central axis. In this way, the structural strength of the boss 3 can be further improved.

[0059] In summary, the seat belt retracting device provided in the embodiment of the present application has at least the following advantages:

[0060] In the embodiment of the present application, since the frame includes a first side plate, the first side plate is suitable for connecting with the housing of the seat belt retractor to form a storage cavity, and the first side plate is provided with a boss on the side close to the storage cavity. Since the first side plate is provided with a boss on the side close to the storage cavity, the structural strength of the first side plate is improved, thereby improving the impact resistance of the frame. In this way, when the pre-tightening structure of the seat belt retractor is activated, that is, when at least part of the mass body enters the storage cavity, deformation of the frame can be effectively avoided, which is conducive to improving the pre-tightening reliability of the seat belt retractor.

[0061] like Figure 2As shown, the embodiment of the present application also provides a seat belt retracting device, which includes: a frame 1 of any one of the above embodiments; a shell 2, the shell 2 is connected to the first side plate 12, and a storage cavity is formed between the shell 2 and the first side plate 12; and a pre-tightening structure, the pre-tightening structure includes a guide tube 6 and a plurality of mass bodies 7, the plurality of mass bodies 7 are slidably connected to the guide tube 6, and the guide tube 6 is connected to the storage cavity. In this way, when the pre-tightening structure of the seat belt retracting device is activated, at least part of the mass bodies 7 enter the storage cavity formed by the first side plate 12 and the shell 2. Since the boss 3 is provided on the side of the first side plate 12 close to the storage cavity, the structural strength of the frame 1 can be improved, the impact resistance can be improved, and the deformation of the frame 1 can be effectively avoided, which is conducive to improving the pre-tightening reliability of the seat belt retracting device.

[0062] It should be noted that in the embodiment of the present application, the structure of the frame 1 is the same as the structure of the frame 1 in any of the above embodiments, and its beneficial effects are also similar, which will not be described in detail here.

[0063] In some optional embodiments of the present application, the guide tube 6 includes a first outlet, and when the pre-tensioning structure is activated, at least part of the mass body 7 is ejected from the first outlet; the seat belt retracting device also includes a guide member 4; the guide member 4 is arranged on the side of the boss 3 close to the shell 2, and the guide member 4 is used to guide the mass body 7 ejected from the first outlet so that the mass body 7 enters the storage cavity along a preset path.

[0064] In the embodiment of the present application, since the guide member 4 is provided, the guide member 4 can guide the mass body 7 ejected from the first outlet so that the mass body 7 enters the storage chamber along a preset path. Specifically, after the mass body 7 ejected from the first outlet cooperates with the recess 81 of the transmission wheel 8 and pushes the transmission wheel 8 to rotate by a preset angle, it is disengaged from the recess 81 of the transmission wheel 8 under the guiding action of the guide member 4, thereby smoothly entering the storage chamber for temporary storage. It should be noted that there is a gap between the guide member 4 and the transmission wheel 8, so that the mass body 7 is disengaged from the recess 81 without interfering with the rotation of the transmission wheel 8.

[0065] In practical applications, a pin is provided on one side of the guide member 4 close to the boss 3, and the boss 3 is provided with a pin hole, and the guide member 4 can be fixedly connected to the boss 3 by inserting the pin into the pin hole. It should be noted that in order to improve the fixing reliability of the guide member 4, the cross-sectional shape of the pin and the pin hole perpendicular to the first direction X is the same, wherein the cross-sectional shape can be an ellipse, a triangle, a rectangle or other irregular shapes, so that the pin will not rotate relative to the pin hole. The embodiment of the present application does not limit the cross-sectional shape of the pin and the pin hole, and those skilled in the art can adjust it according to actual needs.

[0066] In some optional embodiments of the present application, the storage chamber has an arc-shaped channel 5, which is formed by a guide member 4, a boss 3 and a shell 2; along the extension direction of the arc-shaped channel 5, the arc-shaped channel 5 includes a second inlet and a second outlet arranged opposite to each other, and the second inlet is connected to the first outlet; wherein a stop member 51 is located at the second outlet to prevent the mass body 7 from escaping from the arc-shaped channel 5.

[0067] In the embodiment of the present application, on the one hand, since the storage chamber has an arc-shaped channel 5, the mass body 7 separated from the recess 81 of the transmission wheel 8 can be guided to move along a preset path, thereby preventing the disordered movement of multiple mass bodies 7 in the storage chamber from causing a large impact on the frame 1 and the housing 2. On the other hand, since the stopper 51 is located at the second exit, the mass body 7 can be prevented from escaping from the arc-shaped channel 5 and entering the recess 81 of the transmission wheel 8 again, which affects the normal operation of the preload structure.

[0068] The embodiment of the present application further provides a seat belt assembly, which comprises: a seat belt retracting device of any one of the above embodiments, the seat belt retracting device comprising a reel 9, the reel 9 being rotatably connected to the frame 1; and a seat belt, the seat belt being wound around the reel 9. In this way, when an emergency occurs in the vehicle, such as emergency braking or a collision, the pre-tightening structure of the seat belt retracting device will be activated in time to rotate the reel 9 in the reeling direction of the seat belt, thereby realizing the pre-tightening of the seat belt and enhancing the restraining force of the seat belt on the user.

[0069] It should be noted that in the embodiment of the present application, the structure of the seat belt retractor is the same as the structure of the seat belt retractor of any of the above embodiments, and its beneficial effects are also similar, which will not be described in detail here.

[0070] An embodiment of the present application also provides a vehicle, which includes the above-mentioned seat belt assembly.

[0071] It should be noted that in the embodiment of the present application, the structure of the seat belt assembly is the same as the structure of the seat belt assembly in any of the above embodiments, and its beneficial effects are also similar, which will not be described in detail here.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A frame, applied to a seat belt retractor, characterized in that: The frame comprises a first side plate, the first side plate is suitable for being connected to the housing of the safety belt retractor to form a storage cavity, and a boss is arranged on one side of the first side plate close to the storage cavity.

2. The frame according to claim 1, characterized in that The boss and the first side plate are an integrally formed structure.

3. The frame according to claim 1, characterized in that The boss protrudes from the first side plate toward the interior of the storage cavity.

4. The frame according to claim 1, characterized in that The frame also includes a back panel and a second side panel; The first side plate and the second side plate are arranged opposite to each other along a first direction, and the boss is arranged on a side of the first side plate away from the second side plate; The back plate is disposed between the first side plate and the second side plate, and the back plate is connected to the first side plate and the second side plate respectively.

5. The frame according to claim 1, characterized in that The first side plate is provided with a first through hole, and the first through hole is suitable for the reel of the seat belt retracting device to pass through; The boss is disposed adjacent to the first through hole.

6. The frame according to claim 5, characterized in that The first side plate is further provided with a stopper, which is used to stop the mass body of the seat belt retracting device. The stopper protrudes toward the inside of the storage cavity, and the stopper is located at the edge of the first through hole.

7. The frame according to claim 6, characterized in that At least a portion of the boss extends to the stopper.

8. The frame according to claim 1, characterized in that The boss is provided with reinforcing ribs on a side close to the receiving cavity and / or a side away from the receiving cavity.

9. A seat belt retracting device, characterized in that: The seat belt retracting device comprises: The frame according to any one of claims 1 to 8; A shell, wherein the shell is connected to the first side plate, and the storage cavity is formed between the shell and the first side plate; And a pre-tightening structure, the pre-tightening structure includes a guide tube and a plurality of mass bodies, the plurality of mass bodies are slidably connected to the guide tube, and the guide tube is communicated with the receiving cavity.

10. The seat belt retracting device according to claim 9, characterized in that: The guide tube comprises a first outlet, and when the pre-tightening structure is activated, at least a part of the mass body is ejected from the first outlet; The safety belt retracting device also includes a guide member; The guide member is disposed on a side of the boss close to the shell, and is used to guide the mass body ejected from the first outlet so that the mass body enters the receiving cavity along a preset path.

11. A seat belt assembly, characterized in that: The seat belt assembly comprises: The seat belt retractor according to claim 9 or 10, wherein the seat belt retractor comprises a reel, and the reel is rotatably connected to the frame; and a safety belt, wherein the safety belt is wound around the reel.

12. A vehicle, characterized in that: The vehicle comprises a seat belt assembly as claimed in claim 11.

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