Locking device for safety belt retractor, safety belt retractor and vehicle

Abstract

The utility model discloses a locking device for a safety belt retractor, the safety belt retractor and a vehicle. The locking device for the safety belt retractor comprises a shell, a locking device and a locking device, the ratchet wheel is rotatably arranged in the shell; the locking assembly is arranged in the shell and comprises a clamping jaw, and the clamping jaw is rotationally arranged in the shell and suitable for being meshed with the ratchet wheel to be used for limiting rotation of the ratchet wheel; and the driving assembly is located in the shell and fixed to the shell, and when the vehicle state information does not meet the triggering condition, the driving assembly drives the clamping jaw to be separated from the ratchet wheel. According to the locking device for the safety belt retractor, when the vehicle state information does not meet the triggering condition, the driving assembly drives the clamping jaw to be separated from the ratchet wheel, the clamping jaw is prevented from limiting rotation of the ratchet wheel, normal pulling of a safety belt under the vehicle safety working condition is achieved through a simple structure, and the safety belt retractor is convenient to use. Safety belt locking caused by false triggering of the locking device is avoided, use convenience is improved, and normal use of the locking device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a locking device for a seat belt retractor, a seat belt retractor and a vehicle. Background Art

[0002] In related technologies, as an important passive safety restraint component, a seat belt can restrain an occupant in a dangerous situation and protect the occupant from being infringed or less damaged. Among them, the mechanical vehicle sensor in the seat belt retractor can trigger a locking structure when the sensed acceleration (deceleration) or tilt angle exceeds a set threshold, and lock the webbing to achieve restraint of the occupant.

[0003] However, in the actual use process of the mechanical vehicle sensor, there are often some non-dangerous working conditions that can be triggered by the vehicle sensor structure. In these non-dangerous working conditions, if the mechanical vehicle sensor is triggered and the webbing is locked and cannot be pulled out, it will cause great inconvenience to the occupant and even cause some functions to be unable to work properly. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a locking device for a seat belt retractor, which can avoid mis-triggering of the locking device, improve the convenience of use, and ensure the normal use of the locking device for the seat belt retractor.

[0005] The utility model also provides a seat belt retractor, which includes the above-mentioned locking device for a seat belt retractor.

[0006] The utility model also provides a vehicle, which includes the above-mentioned seat belt retractor.

[0007] The locking device for a seat belt retractor according to an embodiment of the utility model includes: a housing; a ratchet wheel rotatably arranged in the housing; a locking assembly arranged in the housing and including a pawl rotatably arranged in the housing and adapted to engage with the ratchet wheel to limit the rotation of the ratchet wheel; a driving assembly located in the housing and fixed to the housing, wherein when the vehicle state information does not meet the triggering condition, the driving assembly drives the pawl to be spaced apart from the ratchet wheel.

[0008] According to the locking device for the seat belt retractor of the embodiment of the utility model, by providing a driving assembly, it can realize that when the vehicle status information does not meet the triggering conditions, the driving assembly drives the claw and the ratchet to be separated, thereby avoiding the claw restricting the rotation of the ratchet. Through a simple structure, the normal pulling of the seat belt under the vehicle safety working condition can be realized, and the seat belt can be locked due to the false triggering of the locking device, thereby improving the convenience of use of the locking device for the seat belt retractor and ensuring the normal use of the locking device for the seat belt retractor.

[0009] In addition, the locking device for the seat belt retractor according to the utility model may also have the following additional technical features:

[0010] In some embodiments, the driving component includes: a magnetic component, which is fixed on the shell; and a valve core, which is movably disposed in the shell. When the vehicle status information does not meet the trigger condition, there is an attractive force between the valve core and the magnetic component, which is used to drive the valve core to move in a direction away from the locking assembly to achieve separation of the claw and the ratchet.

[0011] In some embodiments, when the vehicle status information meets the trigger condition, there is a repulsive force between the valve core and the magnetic element, which is used to drive the valve core to move toward the locking assembly to cancel the restraining force of the valve core on the claw.

[0012] In some embodiments, the driving component also includes: an elastic member, which is sleeved on the valve core. When the vehicle status information does not meet the trigger condition, the valve core compresses the elastic member. When the vehicle status information meets the trigger condition, the elastic member drives the valve core to move toward the locking assembly.

[0013] In some embodiments, the valve core includes a first section and a second section, the first section is located at the end of the second section facing the magnetic element, the outer diameter of the second section is larger than the outer diameter of the first section, the elastic member is sleeved on the first section and abuts against the end of the second section facing the magnetic element, and the end of the second section facing away from the first section is used to drive the claw to move.

[0014] In some embodiments, the claw has a first stop portion and a ratchet respectively located on opposite sides of the claw's rotating shaft, the valve core is inserted into the first stop portion and has a second stop portion, the second stop portion is located on the side of the first stop portion away from the magnetic suction component, when the vehicle status information does not meet the trigger condition, the second stop portion and the first stop portion are abutted against each other to drive the claw to move, and when the vehicle status information meets the trigger condition, the second stop portion is spaced apart from the first stop portion.

[0015] In some embodiments, the jaw has a mating portion, and the locking assembly further includes: a base fixed to the housing, and the jaw is rotatably connected to the base; a steel ball movably disposed on the base, and the steel ball abuts against the mating portion for driving the jaw to move.

[0016] In some embodiments, one surface of the mating portion facing the steel ball is a first spherical surface, and the first spherical surface matches the steel ball; and / or, one surface of the base facing the steel ball is a second spherical surface, and the second spherical surface matches the steel ball.

[0017] The seat belt retractor according to an embodiment of the present invention includes: a retractor main body for retracting the seat belt; the above-mentioned locking device for the seat belt retractor, and the ratchet is fixed to an axial end of the retractor main body and rotates synchronously with the retractor main body.

[0018] For the seat belt retractor according to an embodiment of the present invention, by providing the above-mentioned locking device for the seat belt retractor and a driving component, when the vehicle state information does not meet the triggering condition, it can be realized that the driving component drives the jaw to be spaced apart from the ratchet, avoiding the jaw from restricting the rotation of the ratchet, and realizing the normal pulling of the seat belt under the vehicle safety working conditions through a simple structure, avoiding the seat belt from being locked due to the mis-triggering of the locking device, thereby improving the use convenience of the locking device for the seat belt retractor and ensuring the normal use of the locking device for the seat belt retractor.

[0019] The vehicle according to an embodiment of the present invention includes: the above-mentioned seat belt retractor; a control component electrically connected to the driving component, and the control component is used to obtain the vehicle state information to judge whether the vehicle state information meets the triggering condition.

[0020] For the vehicle according to an embodiment of the present invention, by providing the above-mentioned seat belt retractor and a driving component, when the vehicle state information does not meet the triggering condition, it can be realized that the driving component drives the jaw to be spaced apart from the ratchet, avoiding the jaw from restricting the rotation of the ratchet, and realizing the normal pulling of the seat belt under the vehicle safety working conditions through a simple structure, avoiding the seat belt from being locked due to the mis-triggering of the locking device, thereby improving the use convenience of the locking device for the seat belt retractor and ensuring the normal use of the locking device for the seat belt retractor.

[0021] In addition, the vehicle according to the present invention may further have the following additional technical features:

[0022] In some embodiments, the control component includes a sensing device and a control device. The sensing device is configured to acquire the vehicle state information and transmit the vehicle state information to the control device, and the control device is configured to determine whether the vehicle state information meets the triggering condition and control the driving component.

[0023] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a front view of a locking device for a seat belt retractor according to an embodiment of the present utility model, wherein the vehicle state information does not meet the triggering condition;

[0026] Figure 2 is a front view of a locking device for a seat belt retractor according to an embodiment of the present utility model, wherein the vehicle state information meets the triggering condition;

[0027] Figure 3 is a perspective view of a locking device for a seat belt retractor according to an embodiment of the present utility model, wherein the housing is not shown;

[0028] Figure 4 is a cross-sectional view of a locking device for a seat belt retractor according to an embodiment of the present utility model, wherein the housing is not shown;

[0029] Figure 5 is a perspective view of a locking device for a seat belt retractor according to an embodiment of the present utility model, wherein the housing and part of the driving component are not shown;

[0030] Reference Numerals:

[0031] 100, locking device;

[0032] 1, housing;

[0033] 2, ratchet wheel;

[0034] 3, locking component; 31, pawl; 311, first abutting portion; 312, ratchet teeth; 313, mating portion; 314, first spherical surface; 315, rotating shaft; 316, avoiding groove; 32, base; 321, second spherical surface; 33, steel ball;

[0035] 4. Driving component; 41. Magnetic component; 42. Valve core; 421. First section; 422. Second section; 423. Second abutting portion; 43. Elastic component. Detailed implementation manner

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The locking device 100 for a seat belt retractor according to an embodiment of the present utility model will be described below with reference to the drawings.

[0041] As Figure 1 and Figure 2As shown, the locking device 100 for a seat belt retractor according to an embodiment of the present utility model includes a housing 1, a ratchet wheel 2, a locking assembly 3, and a driving assembly 4.

[0042] Specifically, referring to the attached Figure 1 and the attached Figure 2 As shown, the housing 1 can protect the internal structure of the locking device 100, prevent the internal structure from being exposed and damaged, and ensure the service life of the locking device 100 for the seat belt retractor. Further, referring to the attached Figure 1 and the attached Figure 2 As shown, the ratchet wheel 2 is rotatably disposed in the housing 1, the locking assembly 3 is disposed in the housing 1 and includes a pawl 31, the pawl 31 is rotatably disposed in the housing 1 and is adapted to engage with the ratchet wheel 2 to limit the rotation of the ratchet wheel 2, the driving assembly 4 is located in the housing 1 and fixed to the housing 1, wherein the driving assembly 4 is electrically connected to the control assembly of the vehicle, and the control assembly is used to obtain vehicle state information to determine whether the vehicle state information meets the triggering condition. When the vehicle state information does not meet the triggering condition, the driving assembly 4 drives the pawl 31 to be spaced apart from the ratchet wheel 2.

[0043] Preferably, the vehicle state information is the inclination angle of the vehicle and the change in acceleration (deceleration) sensed by the sensing device. Meeting the triggering condition means that the inclination angle of the vehicle is greater than or equal to the preset value or the vehicle acceleration (deceleration) is greater than or equal to the preset value, and not meeting the triggering condition means that the inclination angle of the vehicle is less than the preset value or the vehicle acceleration (deceleration) is less than the preset value.

[0044] It can be understood that, as Figure 1 shown, when the inclination angle of the vehicle is less than the preset value or the vehicle acceleration (deceleration) is less than the preset value, the control assembly determines that the vehicle state information does not meet the triggering condition, the vehicle is in a safe working condition, the control assembly transmits a signal to the driving assembly 4, and the driving assembly 4 drives the pawl 31 to be spaced apart from the ratchet wheel 2, avoiding the pawl 31 from restricting the rotation of the ratchet wheel 2, ensuring the normal pulling of the seat belt, and preventing the locking device 100 from being accidentally triggered to lock the seat belt, thereby improving the usability of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor; as Figure 2 shown, when the inclination angle of the vehicle is greater than or equal to the preset value or the vehicle acceleration (deceleration) is greater than or equal to the preset value, the control assembly determines that the vehicle state information meets the triggering condition, the vehicle is in a dangerous working condition, the driving assembly 4 cancels the binding force on the pawl 31, and the locking assembly 3 can function normally, so that the pawl 31 engages with the ratchet wheel 2 to limit the rotation of the ratchet wheel 2, lock the seat belt, ensure the restraint of the seat belt on the occupant, protect the occupant from being infringed or less damaged, and improve safety.

[0045] In the prior art, since the backrest and seat cushion of the zero-gravity seat can be adjusted at a large angle, it is easy for the occupant to exceed the vehicle-sensing locking limit angle when adjusting the seat, causing the seat belt to lock, thereby preventing the backrest from further rotating or the occupant from fastening the seat belt, affecting the passenger's riding comfort; when the vehicle is parked at a location with a large slope, the seat belt may be locked due to the posture of the vehicle body, but in reality it is only the vehicle that is parked. When the vehicle needs to be started again, the seat belt may not be pulled out, thereby affecting the normal use of the seat belt and posing a safety risk; when the vehicle is in off-road mode, low-speed creeping is likely to occur, and the vehicle's escape process may involve multiple rapid accelerations and decelerations in a short period of time. In these cases, because of the low speed, the danger is usually low, but it is easy to cause the seat belt to lock continuously, thereby strangling the occupant, causing complaints from the occupant, and poor comfort.

[0046] The drive assembly 4 can be set so that the claw 31 and the ratchet 2 are spaced apart when the control assembly determines that the vehicle status information does not meet the triggering conditions and the vehicle is in a safe working condition, so that the normal pulling of the seat belt can be achieved through a simple structure, and the locking device 100 can be prevented from being triggered by mistake and causing the seat belt to be locked, thereby improving the convenience of using the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor. For example, by providing the drive assembly 4, the working condition of the vehicle can be judged in advance, so as to avoid the locking device 100 from misjudging and locking the seat belt in a non-dangerous working condition, meet the needs of passengers to adjust the seat at a large angle, and improve the comfort and use experience on the basis of ensuring the safety of the passengers.

[0047] It should be noted that when the vehicle is powered off, the drive component 4 is in a power-off state and the drive component 4 has no binding force on the claw 31. When the vehicle is powered on, the drive component 4 is powered on and switched to a safe working condition. The drive component 4 drives the claw 31 to be separated from the ratchet 2. When the control component senses that the vehicle is in a dangerous working condition, the drive component 4 cancels the binding force on the claw 31 and the locking component 3 can function normally.

[0048] According to the locking device 100 for the seat belt retractor of the embodiment of the utility model, by providing a driving component 4, when the vehicle status information does not meet the triggering conditions, the driving component 4 can drive the claw 31 to be separated from the ratchet 2, so as to avoid the claw 31 restricting the rotation of the ratchet 2. The normal pulling of the seat belt under the vehicle safety working condition can be achieved through a simple structure, and the locking device 100 can be avoided from being triggered incorrectly and causing the seat belt to be locked, thereby improving the convenience of use of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0049] In some embodiments of the present invention, refer to the attached Figure 4 and attached Figure 5As shown, the driving component 4 includes a magnetic attraction member 41 and a valve core 42. The magnetic attraction member 41 is fixed on the housing 1 and electrically connected to the control component. The valve core 42 is movably arranged in the housing 1. When the vehicle state information does not meet the triggering condition, there is an attractive force between the valve core 42 and the magnetic attraction member 41, which is used to drive the valve core 42 to move in a direction away from the locking component 3 to separate the pawl 31 from the ratchet wheel 2, prevent the pawl 31 from restricting the rotation of the ratchet wheel 2, ensure the normal pulling of the seat belt, and avoid the mis-triggering of the locking device 100 for the seat belt retractor, resulting in the locking of the seat belt, thereby improving the usability of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0050] Moreover, the movement of the valve core 42 is realized by the mutual attraction between the magnetic attraction member 41 and the valve core 42, which can ensure the quick connection and disconnection between the magnetic attraction member 41 and the valve core 42. When the driving component 4 switches from the power-off state to the powered-on safe operating condition state, the quick unlocking of the pawl 31 and the ratchet wheel 2 is realized, ensuring the normal use of the seat belt by the occupant.

[0051] In a further embodiment of the present utility model, with reference to the attached Figure 2 and the attached Figure 4 , when the vehicle state information meets the triggering condition, there is a repulsive force between the valve core 42 and the magnetic attraction member 41, which is used to drive the valve core 42 to move towards the locking component 3 to cancel the binding force of the valve core 42 on the pawl 31. The locking component 3 can function normally, so that the pawl 31 meshes with the ratchet wheel 2, restricts the rotation of the ratchet wheel 2, locks the seat belt, ensures the restraint of the seat belt on the occupant, protects the occupant from being infringed or less damaged, and improves safety.

[0052] Moreover, the movement of the valve core 42 is realized by the mutual repulsion between the valve core 42 and the magnetic attraction member 41, which can ensure the quick disconnection between the magnetic attraction member 41 and the valve core 42. When the driving component 4 switches from the safe operating condition state to the dangerous operating condition state, the binding force of the valve core 42 on the pawl 31 is cancelled, and the pawl 31 and the ratchet wheel 2 are quickly meshed, quickly restraining the occupant and ensuring the safety of the occupant.

[0053] It can be understood that when the vehicle state information does not meet the triggering condition, the magnetic attraction member 41 is energized with positive electricity, which can make there be an attractive force between the valve core 42 and the magnetic attraction member 41, and the valve core 42 moves in a direction away from the locking component 3, and the pawl 31 is separated from the ratchet wheel 2; when the vehicle state information meets the triggering condition, the magnetic attraction member 41 is energized with reverse electricity, which can make there be a repulsive force between the valve core 42 and the magnetic attraction member 41, and the valve core 42 moves towards the locking component 3 and cancels the binding force on the pawl 31, and the pawl 31 meshes with the ratchet wheel 2.

[0054] In a further embodiment of the present utility model, with reference to the attached Figure 4 and the attachedFigure 5 As shown, the drive assembly 4 also includes an elastic member 43, which is sleeved on the valve core 42. When the vehicle status information does not meet the triggering conditions, there is attraction between the valve core 42 and the magnetic member 41, and the valve core 42 moves in a direction away from the locking assembly 3. The valve core 42 compresses the elastic member 43. When the vehicle status information meets the triggering conditions, the elastic member 43 resets and drives the valve core 42 to move toward the locking assembly 3 to cancel the restraining force of the valve core 42 on the claw 31, so that the locking assembly 3 can function normally, so that the claw 31 engages with the ratchet 2, limits the rotation of the ratchet 2, locks the seat belt, ensures that the seat belt restrains the occupant, protects the occupant from harm or reduces injury, and improves safety.

[0055] It can be understood that the elastic member 43 can be compressed and deformed when the vehicle status information does not meet the trigger conditions. When the vehicle status information meets the trigger conditions, the pressure of the valve core 42 on the elastic member 43 is eliminated, and the elastic force generated by the reset of the elastic member 43 can drive the valve core 42 to move toward the locking assembly 3. The movement of the valve core 42 toward the locking assembly 3 can be achieved without additional electric drive, which can reduce the structural complexity of the locking device 100 for the seat belt retractor and reduce the difficulty of assembling the seat belt retractor.

[0056] In a further embodiment of the present invention, refer to the attached Figure 4 and attached Figure 5 As shown, the valve core 42 includes a first section 421 and a second section 422, the first section 421 is located at the end of the second section 422 facing the magnetic member 41, the outer diameter of the second section 422 is larger than the outer diameter of the first section 421, the elastic member 43 is sleeved on the first section 421 and abuts against the end of the second section 422 facing the magnetic member 41, the end of the second section 422 facing away from the first section 421 is used to drive the claw 31 to move, the first section 421 can guide the elastic member 43 to prevent the elastic member 43 from shifting during the deformation process, and ensure the cooperation between the elastic member 43 and the second section 422, by limiting the outer diameter of the second section 422 to be larger than the outer diameter of the first section 421, the elastic member 43 directly abuts against the end of the second section 422 facing the magnetic member 41, and the second section 422 can compress the elastic member 43 and push the second section 422 without the need for additional components, which can relatively reduce the number of components of the drive assembly 4 and reduce the assembly difficulty of the drive assembly 4.

[0057] It can be understood that when the vehicle state information does not meet the triggering condition, there is an attractive force between the valve core 42 and the magnetic attracting member 41. The valve core 42 moves in a direction away from the locking assembly 3. One end of the second section 422 away from the first section 421 drives the pawl 31 to be spaced apart from the ratchet wheel 2, and one end of the second section 422 facing the first section 421 compresses the elastic member 43. When the vehicle state information meets the triggering condition, the elastic member 43 resets and drives the valve core 42 to move towards the locking assembly 3 to cancel the binding force of the second section 422 on the pawl 31, so that the locking assembly 3 can function properly, enabling the pawl 31 to engage with the ratchet wheel 2, restricting the rotation of the ratchet wheel 2, locking the seat belt, ensuring the restraint of the seat belt on the occupant, protecting the occupant from being infringed or less damaged, and improving safety.

[0058] In a further embodiment of the present utility model, referring to the attached Figure 1 and the attached Figure 3 As shown, the pawl 31 has a first abutting portion 311 and a ratchet tooth 312 respectively located on opposite sides of the rotation axis 315 of the pawl 31. The valve core 42 is disposed in the first abutting portion 311 and has a second abutting portion 423. The second abutting portion 423 is located on the side of the first abutting portion 311 away from the magnetic attracting member 41. When the vehicle state information does not meet the triggering condition, as Figure 1 shown, the second abutting portion 423 abuts against the first abutting portion 311 to drive the movement of the pawl 31, so that the ratchet tooth 312 is spaced apart from the ratchet wheel 2, preventing the ratchet tooth 312 from restricting the rotation of the ratchet wheel 2, ensuring the normal pulling of the seat belt, and avoiding the mis-triggering of the locking device 100 resulting in the locking of the seat belt, thereby improving the usability of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0059] When the vehicle state information meets the triggering condition, as Figure 2 shown, the second abutting portion 423 is spaced apart from the first abutting portion 311, and the second abutting portion 423 cancels the binding force on the first abutting portion 311, enabling the locking assembly 3 to function properly. The pawl 31 rotates to make the ratchet tooth 312 engage with the ratchet wheel 2, restricting the rotation of the ratchet wheel 2, locking the seat belt, ensuring the restraint of the seat belt on the occupant, protecting the occupant from being infringed or less damaged, and improving safety.

[0060] It can be understood that through the cooperation of the first abutting portion 311 and the second abutting portion 423, the rotation of the pawl 31 can be restricted, further preventing the ratchet tooth 312 from engaging with the ratchet wheel 2 and avoiding the locking of the ratchet wheel 2, ensuring the normal pulling of the seat belt, and avoiding the mis-triggering of the locking device 100 resulting in the locking of the seat belt, thereby improving the usability of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0061] Specifically, referring to the attachedFigure 3 and the attached Figure 5 As shown, the first abutting portion 311 has an avoidance groove 316. The avoidance groove 316 penetrates the first abutting portion 311 along the moving direction of the valve core 42 (refer to the a direction shown in the attached Figure 5 figure). The valve core 42 is disposed in the avoidance groove 316 and is spaced apart from the inner wall of the avoidance groove 316 to ensure the movement of the valve core 42 in the avoidance groove 316 and prevent the valve core 42 from interfering with the first abutting portion 311 and affecting the normal rotation of the claw 31. Preferably, refer to the attached Figure 3 and the attached Figure 5 figure. One side of the avoidance groove 316 is open, which is convenient for the valve core 42 to be disposed in the avoidance groove 316.

[0062] In some embodiments of the present invention, refer to the attached Figure 3 and the attached Figure 4 figure. The claw 31 has a mating portion 313. The locking assembly 3 further includes a base 32 and a steel ball 33. The base 32 is fixed to the housing 1. The claw 31 is rotatably connected to the base 32. The steel ball 33 is movably disposed on the base 32. The steel ball 33 abuts against the mating portion 313 to drive the claw 31 to move. The steel ball 33 can drive the claw 31 to move under the action of inertia, so that the claw 31 meshes with the ratchet 2.

[0063] It should be noted that, refer to the attached Figure 3 and the attached Figure 4 figure. The claw 31 is an integral part and includes a mating portion 313, a first abutting portion 311, and a ratchet tooth 312. The first abutting portion 311 and the ratchet tooth 312 are respectively located on opposite sides of the mating portion 313. The rotation axis 315 of the claw 31 is disposed at the connection between the mating portion 313 and the first abutting portion 311. The rotation axis 315 is rotatably connected to the base 32.

[0064] When the vehicle state information does not meet the trigger condition, as Figure 1 shown, the second abutting portion 423 of the valve core 42 abuts against the first abutting portion 311 to drive the claw 31 to rotate. The mating portion 313 abuts against the steel ball 33 to limit the rolling of the steel ball 33. The ratchet tooth 312 is spaced apart from the ratchet 2 to prevent the ratchet tooth 312 from restricting the rotation of the ratchet 2, ensure the normal pulling of the seat belt, and avoid the mis-triggering of the locking device 100 resulting in the locking of the seat belt, thereby improving the use convenience of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0065] When the vehicle state information meets the trigger condition, as Figure 2As shown, the second abutting portion 423 of the valve core 42 is spaced apart from the first abutting portion 311, and the second abutting portion 423 of the valve core 42 cancels the binding force on the first abutting portion 311. At this time, the locking assembly 3 can function normally. When the vehicle acceleration (deceleration) is greater than or equal to the preset value or the vehicle tilt angle is greater than or equal to the preset value, the steel ball 33 rolls at the bottom of the base 32 due to inertia. The steel ball 33 abuts against the mating portion 313, thereby pushing the pawl 31 to rotate, so that the ratchet tooth 312 engages with the ratchet wheel 2 and restricts the rotation of the ratchet wheel 2, locking the seat belt, ensuring the restraint of the seat belt on the occupant, protecting the occupant from being infringed or less damaged, and improving safety.

[0066] It should be noted that by fixing the driving assembly 4 in the housing 1 in the present utility model, the fixing stability of the driving assembly 4 can be ensured, so that the relative position between the driving assembly 4 and the pawl 31 is fixed, which can ensure the cooperation between the driving assembly 4 and the pawl 31 under the vehicle safety conditions, thereby ensuring that the mating portion 313 of the pawl 31 abuts against the steel ball 33, realizing the stable suppression of the steel ball 33, avoiding the steel ball 33 rolling in the base 32 and generating noise, and further reducing the noise of the vehicle under the safety conditions, and further improving the use comfort.

[0067] In a further embodiment of the present utility model, refer to the attached Figure 4 As shown, the surface of the mating portion 313 facing the steel ball 33 is the first spherical surface 314, and the first spherical surface 314 matches the steel ball 33, which can play a limiting role on the steel ball 33 to a certain extent, ensure that the mating portion 313 abuts against the steel ball 33, and guarantee the reliability and stability of the cooperation of the locking assembly 3, avoiding the locking failure of the locking assembly 3 for the ratchet wheel 2.

[0068] Furthermore, refer to the attached Figure 4 As shown, the surface of the base 32 facing the steel ball 33 is the second spherical surface 321, and the second spherical surface 321 matches the steel ball 33, which can realize the steel ball 33 rolling in any direction on the second spherical surface 321, and the top height of the steel ball 33 is different when the steel ball 33 moves to different positions on the second spherical surface 321, so as to realize the steel ball 33 driving the mating portion 313 to rotate, realizing the cooperation or disengagement of the pawl 31 and the ratchet wheel 2, so as to meet the requirements under different working conditions of the vehicle.

[0069] Of course, the present utility model is not limited thereto. The surface of the mating portion 313 facing the steel ball 33 and the surface of the base 32 facing the steel ball 33 can also be formed as an arc surface or a tapered groove, and the top height of the steel ball 33 can also change accordingly when the steel ball 33 moves to different positions in the base 32.

[0070] The present utility model also proposes a seat belt retractor having the locking device 100 for a seat belt retractor in the above embodiment.

[0071] The seat belt retractor according to an embodiment of the present invention includes a retractor main body and the above-mentioned locking device 100 for the seat belt retractor.

[0072] Specifically, the retractor main body is used for retracting the seat belt. The ratchet wheel 2 is fixed to one axial end of the retractor main body and rotates synchronously with the retractor main body. It can be understood that when the vehicle is in a safe working condition, the pawl 31 and the ratchet wheel 2 are arranged at intervals. The ratchet wheel 2 can rotate together with the retractor main body, and the seat belt can be freely retracted and pulled. When the vehicle is in a dangerous working condition, the pawl 31 meshes with the ratchet wheel 2 to restrict the rotation of the ratchet wheel 2, and further restrict the rotation of the retractor main body, so as to realize that the seat belt can be tightened but cannot be pulled out continuously.

[0073] For the seat belt retractor according to an embodiment of the present invention, by providing the above-mentioned locking device 100 for the seat belt retractor and providing a driving assembly 4, when the vehicle state information does not meet the triggering condition, the driving assembly 4 can be realized to drive the pawl 31 and the ratchet wheel 2 to be separated, avoiding the pawl 31 restricting the rotation of the ratchet wheel 2, and realizing the normal pulling of the seat belt under the safe working condition of the vehicle through a simple structure, avoiding the mis-triggering of the locking device 100 for the seat belt retractor resulting in the locking of the seat belt, thereby improving the use convenience of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0074] The present invention also proposes a vehicle having the seat belt retractor of the above embodiment.

[0075] The vehicle according to an embodiment of the present invention includes the above-mentioned seat belt retractor and a control assembly.

[0076] Specifically, the control assembly is electrically connected to the driving assembly 4. The control assembly is used to obtain vehicle state information to judge whether the vehicle state information meets the triggering condition, and control the driving assembly 4 to drive the pawl 31 and the ratchet wheel 2 to mesh or be separated.

[0077] For the vehicle according to an embodiment of the present invention, by providing the above-mentioned seat belt retractor and providing a driving assembly 4, when the control assembly judges that the vehicle state information does not meet the triggering condition, the driving assembly 4 can be realized to drive the pawl 31 and the ratchet wheel 2 to be separated, avoiding the pawl 31 restricting the rotation of the ratchet wheel 2, and realizing the normal pulling of the seat belt under the safe working condition of the vehicle through a simple structure, avoiding the mis-triggering of the locking device 100 for the seat belt retractor resulting in the locking of the seat belt, thereby improving the use convenience of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor.

[0078] In some embodiments of the present utility model, the control assembly includes a sensing device and a control device. The sensing device is used to obtain vehicle state information and transmit the vehicle state information to the control device. The control device is used to determine whether the vehicle state information meets the triggering condition and control the driving assembly 4 to determine whether the vehicle is in a safe operating condition or a dangerous operating condition, so as to send relevant instructions to the driving assembly 4, enabling the driving assembly 4 to restrain the pawl 31 or cancel the restraint force on the pawl 31, thereby causing the pawl 31 and the ratchet wheel 2 to be spaced apart or engaged, realizing the normal pulling or locking of the seat belt.

[0079] For example, the control device is an electronic control unit (ECU), which can receive the vehicle state information transmitted by the sensing device, perform calculation processing and analysis on the vehicle state information, determine whether the vehicle state information meets the triggering condition by comparing the vehicle state information with a set threshold value, and then issue a control instruction to control the driving assembly 4.

[0080] Optionally, the vehicle state information is the inclination angle of the vehicle and the change in acceleration (deceleration) sensed by the sensing device. When the inclination angle of the vehicle is less than a preset value or the vehicle acceleration (deceleration) is less than a preset value, the control device determines that the vehicle state information does not meet the triggering condition, the vehicle is in a safe operating condition, and the control device controls the driving assembly 4 to drive the pawl 31 and the ratchet wheel 2 to be spaced apart, preventing the pawl 31 from restricting the rotation of the ratchet wheel 2, thereby ensuring the normal pulling of the seat belt and avoiding the mis-triggering of the locking device 100 resulting in the locking of the seat belt, thus improving the usability of the locking device 100 for the seat belt retractor and ensuring the normal use of the locking device 100 for the seat belt retractor; when the inclination angle of the vehicle is greater than or equal to the preset value or the vehicle acceleration (deceleration) is greater than or equal to the preset value, the control device determines that the vehicle state information meets the triggering condition, the vehicle is in a dangerous operating condition, the driving assembly 4 cancels the restraint force on the pawl 31, and the locking assembly 3 can function normally to engage the pawl 31 and the ratchet wheel 2 to restrict the rotation of the ratchet wheel 2 and lock the seat belt, ensuring the restraint of the seat belt on the occupant, protecting the occupant from being infringed or less damaged, and improving safety.

[0081] The other components and operations of the locking device 100 for the seat belt retractor, the seat belt retractor, and the vehicle according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0082] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A locking device for a seat belt retractor, characterized in that, include: Housing (1); A ratchet (2), the ratchet (2) being rotatably disposed in the housing (1); A locking assembly (3), the locking assembly (3) being arranged in the housing (1) and comprising a claw (31), the claw (31) being rotatably arranged in the housing (1) and being adapted to engage with the ratchet (2) to limit the rotation of the ratchet (2); a drive assembly (4), the drive assembly (4) being located in the housing (1) and fixed on the housing (1), Wherein, when the vehicle status information does not meet the triggering condition, the driving component (4) drives the claw (31) to be spaced apart from the ratchet (2).

2. The locking device for a seat belt retractor according to claim 1, characterized in that, The driving assembly (4) comprises: A magnetic attraction member (41), wherein the magnetic attraction member (41) is fixed on the housing (1); A valve core (42) is movably disposed in the housing (1); when the vehicle status information does not meet the trigger condition, there is an attractive force between the valve core (42) and the magnetic element (41), which is used to drive the valve core (42) to move in a direction away from the locking assembly (3) so as to achieve the separation of the claw (31) and the ratchet (2).

3. The locking device for a seat belt retractor according to claim 2, characterized in that, When the vehicle status information meets the trigger condition, a repulsive force is generated between the valve core (42) and the magnetic attraction member (41), which is used to drive the valve core (42) to move toward the locking assembly (3) to cancel the restraining force of the valve core (42) on the claw (31).

4. The locking device for a seat belt retractor according to claim 2 or 3, characterized in that, The driving assembly (4) further comprises: An elastic member (43), wherein the elastic member (43) is sleeved on the valve core (42); when the vehicle status information does not meet the trigger condition, the valve core (42) compresses the elastic member (43); when the vehicle status information meets the trigger condition, the elastic member (43) drives the valve core (42) to move toward the locking assembly (3).

5. The locking device for a seat belt retractor according to claim 4, characterized in that, The valve core (42) comprises a first section (421) and a second section (422), wherein the first section (421) is located at one end of the second section (422) facing the magnetic member (41), and the outer diameter of the second section (422) is greater than the outer diameter of the first section (421). The elastic member (43) is sleeved on the first section (421) and abuts against one end of the second section (422) facing the magnetic member (41), and one end of the second section (422) facing away from the first section (421) is used to drive the claw (31) to move.

6. The locking device for a seat belt retractor according to claim 2, characterized in that, The claw (31) has a first stop portion (311) and a ratchet (312) respectively located on opposite sides of the rotating shaft (315) of the claw (31); the valve core (42) is inserted into the first stop portion (311) and has a second stop portion (423); the second stop portion (423) is located on the side of the first stop portion (311) away from the magnetic attraction member (41); when the vehicle status information does not meet the trigger condition, the second stop portion (423) abuts against the first stop portion (311) to drive the claw (31) to move; when the vehicle status information meets the trigger condition, the second stop portion (423) is spaced apart from the first stop portion (311).

7. The locking device for a seat belt retractor according to claim 1, characterized in that, The claw (31) has a matching portion (313), and the locking assembly (3) further comprises: A base (32), the base (32) being fixed on the housing (1), and the claw (31) being rotatably connected to the base (32); A steel ball (33), the steel ball (33) is movably arranged on the base (32), the steel ball (33) abuts against the matching portion (313), and is used to drive the claw (31) to move.

8. The locking device for a seat belt retractor according to claim 7, characterized in that, A surface of the matching portion (313) facing the steel ball (33) is a first spherical surface (314), and the first spherical surface (314) matches the steel ball (33); And / or, a surface of the base (32) facing the steel ball (33) is a second spherical surface (321), and the second spherical surface (321) matches the steel ball (33).

9. A seat belt retractor, characterized in that, include: A retractor body, used for retracting the seat belt; According to the locking device (100) for a seat belt retractor according to any one of claims 1 to 8, the ratchet (2) is fixed to one axial end of the retractor body and rotates synchronously with the retractor body.

10. A vehicle, characterized in that, include: The seat belt retractor according to claim 9; A control component is electrically connected to the drive component (4), and is used to obtain the vehicle status information to determine whether the vehicle status information meets the trigger condition.

11. The vehicle according to claim 10, characterized in that, The control component comprises: A sensing device and a control device, wherein the sensing device is used to obtain the vehicle status information and transmit the vehicle status information to the control device, and the control device is used to determine whether the vehicle status information meets the triggering condition and control the driving component (4).

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