Safety force limiting structure, force limiting buckle mechanism, safety belt assembly, seat and vehicle

Abstract

The utility model belongs to vehicle technical field discloses safe force limiting structure, force limiting lock mechanism, safety belt assembly, seat and vehicle. When the tension of safety belt body or lock catch connecting piece connected with reel is not enough to overcome the resistance between first resistance piece and second resistance piece, reel is fixed relative to mounting frame, so that safety belt body can normally function when vehicle does not have the collision, when the vehicle has the collision, the tension of safety belt body or lock catch connecting piece connected with reel increases instantaneously, so that reel overcomes the resistance between first resistance piece and second resistance piece, so that reel rotates along the preset circumferential direction relative to mounting frame, and safety belt body or lock catch connecting piece connected with reel is pulled out, and safety belt body absorbs part energy to play the buffering effect, reduces the pressure of safety belt body to human body, reduces the harm of human body chest especially rib at the moment of collision. The safe force limiting structure simple structure, small space occupation, low in cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a safety force limiting structure, a force limiting buckle mechanism, a seat belt assembly, a seat, and a vehicle. Background Technology

[0002] The seatbelt buckle, as one of the effective anchor points for the seatbelt, is located on the seat or vehicle floor. In the event of a collision, the seatbelt buckle transfers the energy from the webbing that is in contact with the user's chest and abdomen to the seat or vehicle floor, while simultaneously restricting the body's forward movement through the webbing to prevent injury from collisions with other objects inside the vehicle.

[0003] However, at the moment of impact, the instantaneous force between the webbing and the user's chest and abdomen in contact with the webbing is relatively large. In order to reduce this instantaneous force and avoid injury to the user's chest and abdomen, seat belt buckles with force limiting are usually used. When the force transmitted to the seat belt buckle exceeds the preset minimum force limit, a collision is confirmed. The end of the seat belt buckle connected to the seat belt lock is pulled outward to absorb part of the energy transmitted by the webbing, reduce the pressure of the webbing on the human body, and reduce the damage to the human chest, especially the ribs, at the moment of impact.

[0004] Existing seat belt buckles also have drawbacks such as large structural layout space and high cost. Utility Model Content

[0005] The purpose of this utility model is to provide a safety force limiting structure, a force limiting locking mechanism, a seat belt assembly, a seat, and a vehicle, which can reduce the space occupied by the safety force limiting structure and reduce costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Safety force-limiting structures include:

[0008] Mounting rack;

[0009] A reel having a winding portion for winding a seat belt body or a buckle connector, the reel being rotatably mounted on the mounting frame around its own axis in a predetermined circumferential direction.

[0010] The force limiting unit includes at least one first resistance member disposed on the mounting frame and a second resistance member disposed on the reel. The first resistance member and the second resistance member abut against each other to generate resistance, thereby preventing the reel from rotating relative to the mounting frame in a predetermined circumferential direction.

[0011] As one possible implementation of the aforementioned safety force limiting structure, the second resistance member is a friction wheel, and the first resistance member has a meshing portion that engages with the friction wheel.

[0012] As one possible implementation of the aforementioned safety force limiting structure, the friction wheel includes a starting tooth, a middle tooth, and an ending tooth that are sequentially spaced and gradually decrease in spacing along the preset circumference.

[0013] As one possible implementation of the aforementioned safety force limiting structure, one end of the first resistance member is placed between the starting tooth and the adjacent middle tooth.

[0014] As one possible implementation of the aforementioned safety force-limiting structure, one of the first resistance member and the second resistance member is a rigid body, and the other is an elastic body.

[0015] As one possible implementation of the above-mentioned safety force limiting structure, the first resistance element is a cutting blade capable of cutting the second resistance element, the second resistance element is wound around the outer periphery of the reel, one end of the first resistance element is inserted into the second resistance element, and the other end is fixed to the mounting bracket, and the cutting edge of the cutting blade presses against the second resistance element along the preset circumferential direction.

[0016] As one possible implementation of the aforementioned safety force limiting structure, one end of the first resistance member is inserted into the second resistance member radially along the spool.

[0017] As one possible implementation of the above-mentioned safety force limiting structure, the force limiting unit is provided at both ends of the axial direction of the reel, and the winding part is located between the two force limiting units along the axial direction of the reel.

[0018] As one possible implementation of the above-mentioned safety force limiting structure, the force limiting unit is equipped with a limiting part fixed to the mounting frame;

[0019] Along the axial direction of the reel, the limiting portion is located on the side of the second resistance member of the force limiting unit that is disposed thereaway from the mounting bracket, and abuts against the second resistance member of the force limiting unit.

[0020] As one possible implementation of the above-mentioned safety force limiting structure, the safety force limiting structure further includes a cover that is connected to each of the force limiting units in a one-to-one manner. A receiving cavity is formed between the cover and the mounting bracket, and the force limiting unit and the limiting part are both placed in the corresponding receiving cavity.

[0021] As one possible implementation of the aforementioned safety force-limiting structure, the minimum resistance value is F, where 0.8kN ≤ F < 2kN.

[0022] To achieve the above objectives, this utility model also provides a force-limiting locking mechanism, including the safety force-limiting structure provided by any of the above-described feasible embodiments.

[0023] To achieve the above objectives, this utility model also provides a seat belt assembly, including the safety force limiting structure provided by any of the above-described feasible embodiments, or the force limiting buckle mechanism described above.

[0024] To achieve the above objectives, the present invention also provides a seat, including the safety force limiting structure provided by any of the above-described possible embodiments, or the force limiting buckle mechanism, or the seat belt assembly.

[0025] The vehicle is characterized by including a safety force-limiting structure provided by any of the above-described possible embodiments, or the above-described force-limiting locking mechanism, or the above-described seat belt assembly, or the above-described seat.

[0026] The beneficial effects of this utility model are:

[0027] The safety force-limiting structure provided by this utility model ensures that when the tension on the seat belt or buckle connected to the reel is insufficient to overcome the resistance between the first and second resistance members, the reel remains fixed relative to the mounting frame, allowing the seat belt to function normally when no collision occurs. Upon collision, the tension on the seat belt or buckle connected to the reel increases instantaneously, causing the reel to overcome the resistance between the first and second resistance members. This allows the reel to rotate relative to the mounting frame along a predetermined circumferential direction, pulling out the seat belt or buckle. The seat belt absorbs some energy to provide cushioning, reducing the pressure of the seat belt on the human body and minimizing injury to the chest, especially the ribs, during a collision. This safety force-limiting structure has the advantages of simple structure, small space occupation, and low cost.

[0028] The force-limiting buckle mechanism provided by this utility model includes the above-mentioned safety force-limiting structure. It can not only reduce the pressure of the seat belt on the human body during a collision and reduce the damage to the chest, especially the ribs, at the moment of the collision, but also simplify the structure of the force-limiting buckle mechanism, reduce the space occupied, and reduce costs.

[0029] The seat belt assembly provided by this utility model includes the aforementioned safety force limiting structure or force limiting buckle mechanism. It can not only ensure that the pressure of the seat belt on the human body is reduced during a collision, thus reducing the damage to the chest, especially the ribs, at the moment of the collision, but also simplify the structure of the seat belt assembly and reduce costs.

[0030] The seat provided by this utility model includes the aforementioned safety force limiting structure, or force limiting buckle mechanism, or seat belt assembly. It can not only ensure that the pressure of the seat belt on the human body is reduced during a collision, thereby reducing the damage to the human chest, especially the ribs, at the moment of the collision, but also simplify the structure of the seat and reduce costs.

[0031] The vehicle provided by this utility model includes the aforementioned safety force limiting structure, or force limiting buckle mechanism, or seat belt assembly, or seat. It can not only ensure that the pressure of the seat belt on the human body is reduced during a collision, thereby reducing the damage to the human chest, especially the ribs, at the moment of the collision, but also simplify the structure of the seat and reduce costs. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the first force-limiting locking mechanism installed on the seat frame according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the first type of safety force-limiting structure provided in this embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the first type of safety force limiting structure (the cover located at one end of the axial direction of the reel is not shown) provided in this embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the first type of safety force limiting structure provided in this embodiment of the utility model (the cover and limiting part located at one end of the axial direction of the reel are not shown);

[0036] Figure 5 This is a schematic diagram of the second type of safety force limiting structure provided in this embodiment of the utility model (the cover and limiting part located at one end of the axial direction of the reel are not shown);

[0037] Figure 6 This is a partially enlarged schematic diagram of the second type of safety force limiting structure provided in this embodiment of the utility model.

[0038] In the picture:

[0039] 1. Mounting bracket; 11. U-shaped structure; 12. Flanged edge; 121. Guide hole;

[0040] 2. Scroll;

[0041] 3. Force limiting unit; 31. First resistance element; 32. Second resistance element;

[0042] 4. Limiting part; 5. Cover; 6. Seat frame; 7. Locking connector; 8. Lock;

[0043] 100. Safety-limiting structure. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] Example 1

[0049] An embodiment of this utility model provides a safety force-limiting structure to reduce the space occupied by the safety force-limiting structure and lower costs.

[0050] like Figures 1 to 4As shown, the safety force limiting structure 100 includes a mounting frame 1, a reel 2, and a force limiting unit 3. The reel 2 is rotatably mounted on the mounting frame 1 around its own axis in a preset circumferential direction. The reel 2 has a winding portion for winding the locking connector 7. The force limiting unit 3 includes at least one first resistance member 31 provided on the mounting frame 1 and a second resistance member 32 provided on the reel 2. The first resistance member 31 and the second resistance member 32 abut against each other to generate resistance, thereby preventing the reel 2 from rotating relative to the mounting frame 1 in the preset circumferential direction.

[0051] An embodiment of this utility model also provides a force-limiting buckle mechanism, including a buckle 8, a buckle connector 7, and the aforementioned safety force-limiting structure 100. One end of the buckle connector 7 is connected to the buckle 8, and the other end is wound around the reel 2. The buckle 8 selectively engages or disengages from the locking tongue connected to the seat belt. When the buckle 8 is engaged with the locking tongue, the seat belt provides safety protection for the human body; when the buckle 8 is disengaged from the locking tongue, the safety protection function of the seat belt is released.

[0052] When the tension on the locking connector 7 connected to the reel 2 is insufficient to overcome the resistance between the first resistance member 31 and the second resistance member 32, the reel 2 is fixed relative to the mounting frame 1, allowing the seat belt to function normally when no collision occurs. When a collision occurs, the tension transmitted to the locking connector 7 instantly increases. This tension causes the reel 2 to overcome the resistance between the first and second resistance members 31 and 32, causing the reel 2 to rotate relative to the mounting frame 1 along a predetermined circumferential direction. The locking connector 7 connected to the reel 2 is pulled out, and the seat belt absorbs some energy to provide cushioning, reducing the pressure of the seat belt on the human body and minimizing injury to the chest, especially the ribs, during a collision. This safety force limiting structure 100 has the advantages of simple structure, small space occupation, convenient installation, and low cost.

[0053] For example, both the buckle connector 7 and the seat belt body are webbing structures. Alternatively, the buckle connector 7 can be a rope structure, and the seat belt body can be a webbing structure.

[0054] For example, one first resistance member 31 is provided. Alternatively, two, three, or more first resistance members 31 may be provided, i.e., at least two first resistance members 31 may be used, so that the resistance required to rotate the spool 2 can be greater.

[0055] In some embodiments, such as Figure 4 As shown, the second resistance member 32 is a friction wheel, and the first resistance member 31 has a meshing portion that engages with the friction wheel. Specifically, one end of the first resistance member 31 forms a meshing portion that engages with the friction wheel, and the other end of the first resistance member 31 is fixed to the mounting bracket 1.

[0056] The resistance between the first resistance member 31 and the second resistance member 32 is frictional resistance, which always exists regardless of whether a collision occurs. When a collision occurs, the tension transmitted to the buckle connector 7 by the seat belt increases instantaneously, causing the reel 2 to overcome the frictional resistance between the first resistance member 31 and the second resistance member 32, and causing the reel 2 to rotate relative to the mounting bracket 1 in a preset circumferential direction.

[0057] In some embodiments, such as Figure 4 As shown, the friction wheel includes a starting tooth, a middle tooth, and an ending tooth, which are distributed sequentially along a preset circumference with gradually decreasing intervals. The different spacing between adjacent teeth results in different degrees of deformation of the first resistance member 31 in the initial state after the safety force limiting structure 100 is assembled. The smaller the spacing between adjacent teeth, the greater the deformation of the first resistance member 31 when one end is placed between these two teeth. Correspondingly, the greater the frictional resistance between the first resistance member 31 and the friction wheel, achieving different frictional resistances when the first resistance member 31 engages with the friction wheel at different positions. During the assembly of the safety force limiting structure 100, the first resistance member 31 can be engaged with the friction wheel at different positions as needed to meet the required frictional resistance to overcome when the roller 2 rotates during a vehicle collision. It should be noted that the number of middle teeth can be set according to actual needs. That is, the force limiting stroke of the friction wheel rotating along the preset circumference can be changed according to the number of middle teeth, thus changing the pressure exerted on the human body by the seat belt, ensuring that the pressure exerted on the human body by the seat belt during the force limiting stroke of the friction wheel is never too high.

[0058] For example, one end of the first resistance member 31 is placed between the starting tooth and the adjacent middle tooth. Specifically, when the safety force limiting structure 100 is in its initial state, one end of the first resistance member 31 is placed between the starting tooth and the adjacent middle tooth, at which time the frictional resistance between the first resistance member 31 and the friction wheel is minimal.

[0059] In some embodiments, such as Figure 4 As shown, one of the first resistance member 31 and the second resistance member 32 is a rigid body, and the other is an elastic body. For example, the first resistance member 31 is an elastic body, and the second resistance member 32 is a rigid body. Alternatively, the first resistance member 31 can be a rigid body, and the second resistance member 32 can be an elastic body.

[0060] Since the elastomer can undergo elastic deformation, it is beneficial to keep the safety force limiting structure 100 in its initial state, and the frictional resistance between the first resistance member 31 and the second resistance member 32 is small, thereby reducing the resistance that needs to be overcome to make the roller 2 rotate.

[0061] In some embodiments, such as Figure 4 As shown, the minimum resistance between the first resistance member 31 and the second resistance member 32 is F, where 0.8kN ≤ F < 2kN. When F < 0.8kN, the resistance required to rotate the reel 2 is too small, making it too easy for the reel 2 to rotate. Even when the vehicle is decelerating without a collision, the reel 2 will rotate, thus preventing the seat belt from effectively protecting the human body. When F ≥ 2kN, the resistance required to rotate the reel 2 is too large, making it difficult for the reel 2 to rotate. This results in the reel 2 not rotating when the impact force is not large, causing excessive pressure on the human body from the seat belt, which can easily cause injury to the chest and abdomen of the human body at the moment of collision.

[0062] By ensuring that the distance between two adjacent teeth at one end of the first resistance member 31 is 0.8kN≤F<2kN when the safety force limiting structure 100 is in its initial state, it is possible to ensure that the resistance required to rotate the roller 2 is neither too large nor too small, thereby enabling the safety belt to effectively ensure the safety of the human body.

[0063] It should be noted that F can be any value within the range of 0.8kN or greater and less than 2kN, such as any one of 0.8kN, 0.9kN, 1.0kN, 1.1kN, 1.2kN, 1.3kN, 1.4kN, 1.5kN, 1.6kN, 1.7kN, 1.8kN, or 1.9kN.

[0064] In some embodiments, the second resistance element 32 is made of metal, such as magnesium-aluminum alloy structural components or steel structures, and the structural components capable of elastic deformation are made of rubber, such as thermoplastic polyolefins or polyester resins.

[0065] As an alternative, the second resistance element 32 can also be made of a plastic that is not easily deformed, namely thermoplastic plastic, or a steel sheet with a certain thickness that can undergo elastic deformation.

[0066] The safety force limiting structure 100 can change the maximum static friction between the first resistance member 31 and the second resistance member 32 when the safety force limiting structure 100 is in its initial state, and the maximum static friction between the first resistance member 31 and the second resistance member 32 during the rotation of the scroll 2, by selecting the materials used to prepare the first resistance member 31 and the second resistance member 32, as well as the surface processing precision of the two.

[0067] The safety force limiting structure 100 can control the pressure changes of the seat belt on the human body and the energy changes that the seat belt can absorb within the force limiting stroke by setting the force limiting stroke that can be achieved by different friction wheel rotations and the frictional resistance changes between the first resistance member 31 and the second resistance member 32 within the force limiting stroke.

[0068] In some embodiments, such as Figure 4 As shown, force-limiting units 3 are provided at both ends of the axial direction of the spool 2, and the winding part is located between two force-limiting units 3 along the axial direction of the spool 2. This arrangement ensures that the forces at both ends of the spool 2 are balanced, improving the smoothness of the rotation of the spool 2 and preventing jamming caused by force on one end of the spool 2. As an alternative, a single force-limiting unit 3 can also be provided, with the force-limiting unit 3 and the winding part arranged at intervals along the axial direction of the spool 2.

[0069] Specifically, the mounting frame 1 includes a U-shaped structure 11 that runs vertically through the top and bottom and has an opening on one side in the first horizontal direction. The U-shaped structure 11 has two mounting walls that are arranged opposite each other in the second horizontal direction. The scroll 2 runs through the second horizontal direction and is rotatably mounted on the two mounting walls. The two ends of the scroll 2 pass through the two mounting walls one by one and are connected to a second resistance member 32. The mounting frame 1 is located between the second resistance members 32 of the two force limiting units 3 along the axial direction of the scroll 2. The winding part is located between the two mounting walls and can use the two mounting walls to axially limit the locking connector 7 wound around the outer periphery of the winding part. The first horizontal direction and the second horizontal direction are perpendicular.

[0070] In some embodiments, such as Figure 1 and Figure 4 As shown, the top of the mounting bracket 1 is provided with a guide hole 121 for the insertion of the latch connector 7. After passing through the guide hole 121, the latch connector 7 is connected to the latch 8. The guide hole 121 guides the latch connector 7, and the inner wall of the guide hole 121 forms an action wall. The latch connector 7 presses against the action wall, so that when the latch tongue separates from the latch 8, the frictional resistance between the latch connector 7 and the action wall can prevent the latch connector 7 wound on the scroll 2 from loosening.

[0071] For example, the upper edge of the bottom wall of the U-shaped structure 11 is folded towards the side where the mounting wall is located to form a flange 12, and a guide hole 121 is provided on the flange 12 and extends through the flange 12 in the vertical direction.

[0072] In some embodiments, such as Figure 4 As shown, the mounting bracket 1 is a one-piece molded structural component, which is low in cost and easy to process. Exemplarily, the mounting bracket 1 is a stamped structural component. Alternatively, the mounting bracket 1 can also be a casting or an injection molded part.

[0073] In some embodiments, such as Figure 3 and Figure 4As shown, the force limiting unit 3 is equipped with a limiting part 4 fixed to the mounting frame 1; along the axial direction of the reel 2, the limiting part 4 is located on the side of the second resistance member 32 of the force limiting unit 3 away from the mounting frame 1, and abuts against the second resistance member 32 of the force limiting unit 3. Exemplarily, the force limiting unit 3 and the limiting part 4 correspond one-to-one. As an alternative, at least two limiting parts 4 can be provided for the second resistance member 32 of a force limiting unit, arranged at intervals along the circumference of the second resistance member 32.

[0074] The limiting part 4 and the second resistance member 32 abut against each other along the axial direction of the reel 2. Since the limiting part 4 is installed on the mounting bracket 1, it is beneficial to increase the force to overcome the resistance between the first resistance member 31 and the second resistance member 32 so that when the reel 2 rotates, the seat belt body applies a pulling force to the buckle connector 7 and pulls the buckle connector 7 out.

[0075] When applied to a safety force limiting structure 100 with two force limiting units 3, the scroll 2 is clamped between the two limiting parts 4 along the axial direction of the scroll 2, which can limit the scroll 2.

[0076] Specifically, the spool 2 is a stepped spool with two stepped surfaces. The two stepped surfaces and two second resistance members 32 are arranged in a one-to-one correspondence. The second resistance members 32 are sleeved on the outside of the spool 2 and are clamped between the corresponding stepped surfaces and the limiting part 4 along the axial direction of the spool 2.

[0077] As an alternative, when setting two force limiting units 3, one of the second resistance components 32 can be integrally formed on the scroll 2, and the other second resistance component 32 can be installed on the scroll 2.

[0078] In some embodiments, such as Figure 3 and Figure 4 As shown, the limiting part 4 and the mounting bracket 1 are connected by a first fastener, which simplifies the installation process and reduces costs. Exemplarily, two first fasteners are provided. It should be noted that three, four, or more first fasteners can also be provided.

[0079] In some embodiments, such as Figure 2 and Figure 3 As shown, the safety force limiting structure 100 also includes a cover 5 that is connected to the force limiting unit 3 in a one-to-one manner. A receiving cavity is formed between the cover 5 and the mounting bracket 1, and the force limiting unit 3 and the limiting part 4 are both placed in the corresponding receiving cavity.

[0080] By placing both the force limiting unit 3 and the limiting part 4 inside their respective receiving cavities, the aesthetics can be prevented from being exposed.

[0081] In some embodiments, such as Figure 2 and Figure 3As shown, the cover 5 and the mounting bracket 1 are connected by a second fastener, which simplifies installation and reduces costs. Exemplarily, three second fasteners are provided, arranged circumferentially around the reel 2. It should be noted that two, four, or more second fasteners can also be provided.

[0082] In some embodiments, such as Figures 2 to 4 As shown, the first fastener is located between two adjacent second fasteners. This arrangement helps to avoid interference between the first and second fasteners, and also allows the end of the first fastener closest to the cover 5 to be placed inside the receiving cavity, reducing the number of exposed fasteners and improving the aesthetic effect.

[0083] In some embodiments, such as Figure 1 As shown, an embodiment of this utility model also provides a seat belt assembly, including the aforementioned safety force limiting structure 100 or force limiting buckle mechanism. This seat belt assembly includes the aforementioned force limiting buckle mechanism and has the same technical effects as the aforementioned force limiting buckle mechanism, and will not be described again here.

[0084] The safety force limiting structure 100 has two application scenarios. One application scenario is to apply the safety force limiting structure 100 to the force limiting buckle mechanism. The other application scenario is to apply the above-mentioned force limiting buckle mechanism directly to the seat belt assembly. One end of the seat belt body of the seat belt assembly is wound on the reel, and the seat belt body passes through the locking tongue. The locking tongue is movable along the extension direction of the seat belt body.

[0085] In some embodiments, such as Figure 1 As shown, an embodiment of this utility model also provides a seat, including the aforementioned force-limiting locking mechanism, or the aforementioned safety force-limiting structure 100, or the aforementioned seat belt assembly. This seat has the same technical effects as the aforementioned force-limiting locking mechanism, and will not be described again here.

[0086] For a vehicle seat, a seat belt assembly may use only one of the above-mentioned safety force limiting structures 100, which is applied to either of the two application scenarios; a seat belt assembly may also use two of the above-mentioned safety force limiting structures 100, which are each applied to one of the two application scenarios.

[0087] The seat also includes a seat body and a seat frame 6 mounted on the seat body. For a seat body that is movable along the front and rear of the vehicle, fixing the mounting bracket 1 to the seat frame 6 ensures that the seat belt assembly does not affect the front and rear movement of the seat body. For a seat body that is not movable along the front and rear of the vehicle, the mounting bracket can be fixed to the seat frame 6 or to the floor.

[0088] In some embodiments, the present invention also provides a vehicle including the force-limiting locking mechanism described above, or including the safety force-limiting structure 100 described above, or including the seat belt assembly described above, or the seat described above. This vehicle has the same technical effects as the force-limiting locking mechanism described above, and will not be described again here.

[0089] Example 2

[0090] The difference between this embodiment and Embodiment 1 is that, as Figure 5 and Figure 6 As shown, the first resistance element 31 is a cutting blade and can cut the second resistance element 32. The second resistance element 32 is wound around the outer periphery of the spool 2. One end of the first resistance element 31 is inserted into the second resistance element 32, and the other end is fixed to the mounting bracket 1. The cutting edge of the cutting blade presses against the second resistance element 32 along a preset circumferential direction.

[0091] When a vehicle collision occurs, the tension transmitted to the buckle connector 7 by the seat belt increases instantaneously. This tension causes the spool 2 to overcome the resistance between the first resistance member 31 and the second resistance member 32, and the buckle connector 7 connected to the spool 2 is pulled out. As the spool 2 continues to rotate, the cutting blade continuously cuts the second resistance member 32, so that the frictional resistance between the first resistance member 31 and the second resistance member 32 always exists.

[0092] In some embodiments, such as Figure 5 and Figure 6 As shown, one end of the first resistance member 31 is inserted radially into the second resistance member 32 along the spool 2 to reduce the occupancy of the first resistance member 31 on the axial space of the spool 2, and to reduce the space occupied by the safety limiting structure 100 along the axial direction of the spool 2. For example, the spool 2 has a C-shaped structure. It should be noted that the spool 2 can also adopt a ring structure, with a through hole provided in the ring structure, one end of which extends through to the outer peripheral wall of the ring structure, and one end of the first resistance member 31 is inserted radially into the through hole along the spool 2.

[0093] As an alternative, one end of the first resistance member 31 can be inserted into the second resistance member 32 along the axial direction of the spool 2.

[0094] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A safety force-limiting structure, characterized in that, include: Mounting bracket (1); A reel (2) has a winding part for winding a safety belt body or a buckle connector (7). The reel (2) is rotatably mounted on the mounting frame (1) around its own axis in a preset circumferential direction. The force limiting unit (3) includes at least one first resistance member (31) disposed on the mounting frame (1) and a second resistance member (32) disposed on the spool (2). The first resistance member (31) and the second resistance member (32) abut against each other to generate resistance, thereby preventing the spool (2) from rotating relative to the mounting frame (1) in a predetermined circumferential direction.

2. The safety force-limiting structure according to claim 1, characterized in that, The second resistance member (32) is a friction wheel, and the first resistance member (31) has a meshing part that meshes with the friction wheel.

3. The safety force-limiting structure according to claim 2, characterized in that, The friction wheel includes a starting tooth, a middle tooth, and an ending tooth that are distributed sequentially at intervals along the preset circumference and whose intervals gradually decrease.

4. The safety force-limiting structure according to claim 3, characterized in that, One end of the first resistance member (31) is placed between the starting tooth and the adjacent middle tooth.

5. The safety force-limiting structure according to any one of claims 2 to 4, characterized in that, One of the first resistance member (31) and the second resistance member (32) is a rigid body and the other is an elastic body.

6. The safety force-limiting structure according to claim 1, characterized in that, The first resistance member (31) is a cutting blade and is capable of cutting the second resistance member (32). The second resistance member (32) is wound around the outer periphery of the spool (2). One end of the first resistance member (31) is inserted into the second resistance member (32), and the other end is fixed to the mounting bracket (1). The cutting edge of the cutting blade presses against the second resistance member (32) along the preset circumferential direction.

7. The safety force-limiting structure according to claim 6, characterized in that, One end of the first resistance member (31) is inserted into the second resistance member (32) along the radial direction of the spool (2).

8. The safety force-limiting structure according to any one of claims 1 to 7, characterized in that, The force limiting unit (3) is provided at both ends of the axial direction of the spool (2), and the winding part is located between the two force limiting units (3) along the axial direction of the spool (2).

9. The safety force-limiting structure according to claim 8, characterized in that, The force limiting unit (3) is equipped with a limiting part (4) fixed to the mounting frame (1); Along the axial direction of the spool (2), the limiting part (4) is located on the side of the second resistance member (32) of the force limiting unit (3) that is disposed thereaway from the mounting bracket (1), and abuts against the second resistance member (32) of the force limiting unit (3).

10. The safety force-limiting structure according to claim 9, characterized in that, The safety force limiting structure (100) also includes a cover (5) that is connected to the force limiting unit (3) in a one-to-one manner. A receiving cavity is formed between the cover (5) and the mounting bracket (1). The force limiting unit (3) and the limiting part (4) are both placed in the corresponding receiving cavity.

11. The safety force-limiting structure according to any one of claims 1 to 10, characterized in that, The minimum resistance value is F, where 0.8kN ≤ F < 2kN.

12. A force-limiting locking mechanism, characterized in that, The safety force-limiting structure (100) as described in any one of claims 1-11.

13. A seat belt assembly, characterized in that, Includes the safety force limiting structure (100) as described in any one of claims 1-11, or the force limiting locking mechanism as described in claim 12.

14. A seat, characterized in that, Includes the safety force limiting structure (100) as described in any one of claims 1-11, or the force limiting buckle mechanism as described in claim 12, or the seat belt assembly as described in claim 13.

15. A vehicle, characterized in that, Includes the safety force limiting structure (100) as described in any one of claims 1-11, or the force limiting buckle mechanism as described in claim 12, or the seat belt assembly as described in claim 13, or the seat as described in claim 14.

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