Safety belt retractor, locking device thereof and vehicle

Abstract

The utility model discloses a safety belt retractor, a locking device of the safety belt retractor and a vehicle. The mechanical locking device is provided with first limiting teeth, the first electromagnetic locking device is matched with the mechanical locking device, the first electromagnetic locking device is configured to be capable of limiting matching of the first limiting teeth and the ratchet wheel when powered on and canceling limitation on the first limiting teeth when powered off, and the second electromagnetic locking device is provided with second limiting teeth. The second electromagnetic locking device is configured in the mode that the second limiting teeth can be matched with the ratchet wheel when powered on, and the second limiting teeth are disengaged from the ratchet wheel when powered off. According to the safety belt retractor, the two electromagnetic locking devices are arranged, active locking can be achieved, using of the mechanical locking device is limited, different using working conditions are met, noise can be reduced to a certain degree, rotation of the ratchet wheel is limited through the mechanical locking device when an electromagnetic system is powered off, and therefore the safety belt retractor is safe and reliable. And the use safety is improved.

Description

Technical Field

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

[0002] The seat belt is an important passive safety restraint component of a vehicle, which restrains the occupant in case of danger and protects the occupant from being infringed or less damaged; in this process, the dangerous situation triggering structure in the seat belt retractor plays an important role.

[0003] This triggering structure mainly refers to a mechanical vehicle sense belt sense structure, which actively triggers the retractor locking structure when sensing a dangerous situation to realize the restraint of the occupant. However, during the normal driving of the vehicle, the steel ball in the mechanical vehicle sense is always in an active state, thus generating noise and there is room for improvement. 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 reason, an object of the utility model is to provide a locking device for a seat belt retractor, the locking device has a simple structure, is reliable in use and can reduce noise.

[0005] The utility model also provides a seat belt retractor.

[0006] The utility model also provides a vehicle.

[0007] The locking device for a seat belt retractor according to the first aspect embodiment of the utility model includes: a ratchet wheel; a locking mechanism, the locking mechanism is arranged on the outer periphery of the ratchet wheel and includes a mechanical locking device, a first electromagnetic locking device and a second electromagnetic locking device, the mechanical locking device has a first limiting tooth, the first electromagnetic locking device cooperates with the mechanical locking device, the first electromagnetic locking device is configured to limit the cooperation between the first limiting tooth and the ratchet wheel when being electrified and cancel the limitation on the first limiting tooth when being powered off, the second electromagnetic locking device has a second limiting tooth, the second electromagnetic locking device is configured to enable the second limiting tooth to cooperate with the ratchet wheel when being electrified and separate the second limiting tooth from the ratchet wheel when being powered off.

[0008] The locking device of the seat belt retractor according to the embodiment of the present utility model realizes the function of active locking by setting two electromagnetic locking devices. One locking device can cooperate with the mechanical locking device, and the other electromagnetic locking device can directly cooperate with the ratchet of the retractor body to restrict the rotation of the ratchet through the electromagnetic system, and restricts the use of the mechanical locking device, which can meet different usage conditions, such as restricting the rotation of the ratchet under zero-gravity seat conditions and large-angle adjustment states of the seat. At the same time, it can suppress noise to a certain extent and improve the comfort of use. At the same time, when the electromagnetic system is powered off, the rotation of the ratchet can be restricted by the mechanical locking device, which improves the safety of use.

[0009] In some embodiments, the first electromagnetic locking device includes: a first movable member movably disposed on one side of the mechanical locking device; a first electromagnetic driving member having a valve core, the valve core cooperating with the first movable member to drive the first movable member to move between a first position and a second position. Wherein, when the first electromagnetic locking device is powered on, the first movable member is located at the first position, and the first movable member cooperates with the mechanical locking device. When the first electromagnetic locking device is powered off, the first movable member is located at the second position, and the first movable member is disengaged from the mechanical locking device.

[0010] In some embodiments, the first movable member has a first rotating shaft, and the first movable member can rotate along the first rotating shaft between the first position and the second position to cooperate or disengage the first movable member with the mechanical locking device.

[0011] In some embodiments, a return spring is further included, the return spring is connected to the first movable member, and the return spring is configured to deform and store energy when the first movable member is at the first position to drive the first movable member to move to the second position when the first electromagnetic locking device is powered off.

[0012] In some embodiments, a clamping member is provided on a side of the first movable member close to the valve core, and the valve core is adapted to be clamped and cooperate with the clamping member.

[0013] In some embodiments, a first monitoring device is further included, and the first monitoring device is disposed on one side of the first electromagnetic locking device for identifying the position of the valve core or the first movable member.

[0014] In some embodiments, the second electromagnetic locking device includes: a second movable member having the second limiting teeth; a second electromagnetic driving member cooperating with the second movable member to drive the second movable member to move, so that the second limiting teeth cooperate or disengage with the ratchet.

[0015] In some embodiments, it further includes: a second monitoring device, which is arranged on one side of the second electromagnetic locking device and is used to identify the position of the second moving part.

[0016] In some embodiments, the mechanical locking device includes a steel ball seat, a steel ball, a rotating part and the first limiting tooth. The steel ball is arranged on the steel ball seat and is used to sense the tilt angle and acceleration change signal of the vehicle. The rotating part is rotatably arranged on the steel ball seat and rotates with the movement of the steel ball. The first limiting tooth is arranged on the rotating part.

[0017] In some embodiments, the second electromagnetic locking device and the mechanical locking device are arranged at intervals along the circumferential direction of the ratchet wheel, and the first electromagnetic locking device is located on one side of the mechanical locking device.

[0018] In some embodiments, it further includes: a control device and a sensing device. The control device is connected to the first electromagnetic locking device and the second electromagnetic locking device. The sensing device is used to sense the tilt angle and acceleration change signal of the vehicle and transmit the signal to the control device. The control device judges the dangerous situation by comparing the signal with a set threshold value and issues a command signal to control the power-on or power-off of the first electromagnetic locking device and the second electromagnetic locking device.

[0019] According to the seat belt retractor of the second aspect embodiment of the present invention, it includes a retractor body and the locking device of the seat belt retractor according to the first aspect embodiment of the present invention. The ratchet wheel is arranged on the retractor body. By adopting the above locking device, through the combination of mechanical limit and electromagnetic control, a flexible and safe seat belt management solution is provided, which can meet different usage conditions, and at the same time, to a certain extent, suppress noise, improving the comfort and safety of use.

[0020] According to the vehicle of the third aspect embodiment of the present invention, it includes the seat belt retractor according to the second aspect embodiment of the present invention. By adopting the above seat belt retractor, through the combination of mechanical limit and electromagnetic control, a flexible and safe seat belt management solution is provided, which can meet different usage conditions, and at the same time, to a certain extent, suppress noise, improving the comfort and safety of use.

[0021] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present utility model will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a perspective view of a seat belt retractor according to some embodiments of the present utility model;

[0024] Figure 2 is a schematic diagram of a seat belt retractor according to some embodiments of the present utility model in a state;

[0025] Figure 3 is a schematic diagram of a seat belt retractor according to some embodiments of the present utility model in a state;

[0026] Figure 4 is a schematic diagram of a seat belt retractor according to some embodiments of the present utility model in a state;

[0027] Figure 5 is a schematic diagram of a seat belt retractor according to other embodiments of the present utility model.

[0028] Reference numerals:

[0029] seat belt retractor 100,

[0030] retractor body 10, ratchet 11,

[0031] mechanical locking device 20, first limiting tooth 21, steel ball 22, rotating member 23, steel ball seat 24,

[0032] first electromagnetic locking device 30, first movable member 31, clamping member 311, first electromagnetic driving member 32, valve core 321,

[0033] second electromagnetic locking device 40, second movable member 41, second limiting tooth 411, second electromagnetic driving member 42. Detailed Description of the Embodiments

[0034] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein 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 by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0035] 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 therefore should not be construed as a limitation of the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside 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 situations.

[0037] The following refers to Figures 1-5 Describe the locking device of the seat belt retractor 100 according to an embodiment of the present utility model.

[0038] As Figures 1-5 shown, a locking device according to an embodiment of the present utility model includes: a ratchet 11 and a locking mechanism. The ratchet 11 can be provided on the retractor body 10, and a seat belt is provided on the retractor body 10. The locking mechanism is provided on the outer periphery of the ratchet 11, and the locking mechanism can limit the movement of the ratchet 11, thereby realizing the restraint of the seat belt. The locking mechanism includes a mechanical locking device 20, a first electromagnetic locking device 30 and a second electromagnetic locking device 40. The mechanical locking device 20 has a first limiting tooth 21. The first electromagnetic locking device 30 cooperates with the mechanical locking device 20. Among them, when the first electromagnetic locking device 30 is energized, the cooperation between the first limiting tooth 21 and the ratchet 11 can be restricted, that is, the mechanical locking device 20 is limited. When the first electromagnetic locking device 30 is de-energized, the restriction on the first limiting tooth 21 can be cancelled, so that the mechanical locking device 20 can be used to control the retracting action of the retractor body 10.

[0039] The second electromagnetic locking device 40 has a second limiting tooth 411. When the second electromagnetic locking device 40 is powered on, the second limiting tooth 411 can cooperate with the ratchet wheel 11, so that the second limiting tooth 411 can be used to control the winding action of the retractor body 10. When the second limiting tooth 411 is powered off, the second limiting tooth 411 can be disengaged from the ratchet wheel 11, which can avoid interference between the second electromagnetic locking device 40 and the mechanical locking device 20.

[0040] Specifically, during normal vehicle driving, the first electromagnetic locking device 30 is in the powered-on state, and the second electromagnetic locking device 40 is in the powered-off state. When in a non-dangerous state, the first electromagnetic locking device 30 is always in the powered-on state to inhibit the mechanical locking device 20. At this time, the components inside the mechanical locking device 20 will not move, avoiding noises and abnormal sounds caused by the shaking of the steel ball 22 or other mechanical structures, etc.; at the same time, the second electromagnetic locking device 40 is always in the powered-off state, and the second limiting tooth 411 and the ratchet wheel 11 of the retractor body 10 are arranged at intervals, without affecting the winding action of the retractor body 10, and thus will not affect the extension or winding of the seat belt.

[0041] When a dangerous situation occurs, the first electromagnetic locking device 30 is in the powered-on state, and the second electromagnetic locking device 40 switches to the powered-on state. The first electromagnetic locking device 30 inhibits the mechanical locking device 20. At this time, the components inside the mechanical locking device 20 still will not move, and the second limiting tooth 411 cooperates with the ratchet wheel 11 of the retractor body 10, so that the rotation of the ratchet wheel 11 can be restricted, thereby locking the seat belt to achieve the function of restraining the passenger.

[0042] When the electromagnetic system fails or loses power, the first electromagnetic locking device 30 switches to the powered-off state, and the first electromagnetic locking device 30 cancels the restriction on the first limiting tooth 21, so that the use of the mechanical locking device 20 will not be restricted. The mechanical locking device 20 can be used to control the winding action of the retractor body 10. For example, when a dangerous situation occurs, the vehicle acceleration and tilt angle can be sensed by the steel ball 22 to exceed the threshold value, and then the first limiting tooth 21 is pushed to cooperate with the ratchet wheel 11 to achieve locking, restricting the rotation of the ratchet wheel 11, and further locking the seat belt to achieve the function of restraining the passenger, that is, when the electromagnetic system loses power or fails, due to the effective action of the mechanical locking device 20, the ratchet wheel 11 can still be locked.

[0043] According to the seat belt retractor 100 of the embodiment of the present utility model, by providing two electromagnetic locking devices, one locking device can cooperate with the mechanical locking device 20, and the other electromagnetic locking device can directly cooperate with the ratchet wheel 11 of the retractor body 10. The rotation of the ratchet wheel 11 is restricted through the electromagnetic system to achieve the function of active locking, and the use of the mechanical locking device 20 is restricted, which can meet different usage conditions. For example, it can meet the restriction of the rotation of the ratchet wheel 11 under zero-gravity seat conditions and large-angle adjustment states of the seat. At the same time, the noise is suppressed to a certain extent, improving the comfort of use; at the same time, when the electromagnetic system is powered off, the rotation of the ratchet wheel 11 can be restricted by the mechanical locking device 20, improving the safety of use.

[0044] As Figures 2-4 shown, in some embodiments, the first electromagnetic locking device 30 includes: a first movable member 31 and a first electromagnetic driving member 32. The first movable member 31 is movably arranged on one side of the mechanical locking device 20. The first electromagnetic driving member 32 has a valve core 321, and the valve core 321 cooperates with the first movable member 31 to drive the first movable member 31 to move, so that the first movable member 31 can move between a first position and a second position. Here, the first movable member 31 can move between the two positions by moving or by rotating.

[0045] Among them, as Figure 2 and Figure 3 shown, when the first electromagnetic driving member 32 is in the energized state, the first movable member 31 is located at the first position, and the first movable member 31 cooperates with the mechanical locking device 20, and the first movable member 31 inhibits the mechanical locking device 20. At this time, the components in the mechanical locking device 20 will not move; as Figure 4 shown, when the first electromagnetic driving member 32 is in the de-energized state, the first movable member 31 is located at the second position, and the first movable member 31 is disengaged from the mechanical locking device 20, thus canceling the restriction on the first limiting tooth 21 and not restricting the use of the mechanical locking device 20. The mechanical locking device 20 can be used to control the retracting action of the retractor body 10. For example, in case of danger, the vehicle acceleration and tilt angle can be sensed by the steel ball 22 to exceed the threshold value, and then the first limiting tooth 21 is pushed to cooperate with the ratchet wheel 11 to achieve locking.

[0046] The mechanical locking device 20 has a rotating member 23, and a first limiting tooth 21 is provided on the rotating member 23. The first limiting tooth 21 can be integrally formed with the rotating member 23. The first electromagnetic driving member 32 also has an electromagnetic coil. When the electromagnetic coil is energized, the valve core 321 is attracted and moves downward, driving the first movable member 31 to move to the first position. The rotating member 23 is located below the first movable member 31, and at this time, the first movable member 31 abuts against the rotating member 23. When the electromagnetic coil is de-energized, the valve core 321 pops out and moves upward, driving the first movable member 31 to move to the second position. The rotating member 23 is still located below the first movable member 31, and at this time, the first movable member 31 and the rotating member 23 are arranged at intervals, so as not to limit the rotation of the rotating member 23. The mechanical locking device 20 can be used to control the retracting action of the retractor body 10.

[0047] As Figure 2 shown, in some specific embodiments, the first movable member 31 has a first rotating shaft m. The first movable member 31 can rotate between the first position and the second position along the first rotating shaft m, so that the first movable member 31 cooperates or disengages with the mechanical locking device 20. That is to say, the first movable member 31 is restricted to one side of the mechanical locking device 20 by the first rotating shaft, and the first movable member 31 moves between the two positions in a rotating manner. The setting of the first rotating shaft can limit the position of the first movable member 31 to a certain extent, avoiding large displacement of the first movable member 31, which may cause difficulty in cooperating with the mechanical locking device 20, etc., and improving the reliability of the entire retractor.

[0048] In some embodiments, the seat belt retractor 100 further includes a return spring. The return spring is connected to the first movable member 31. When the first movable member 31 is in the first position, the return spring can be deformed and store energy. When the first electromagnetic locking device 30 is de-energized, the return spring can drive the first movable member 31 to move to the second position by its elastic force, so as to increase the moving speed of the first movable member 31 when the first electromagnetic driving member 32 is de-energized, and further enable the seat belt retractor 100 to quickly switch to the state where the mechanical locking device 20 takes effect, improving the reliability of the seat belt retractor 100.

[0049] As Figure 3 shown, in some embodiments, a clamping member 311 is provided on one side of the first movable member 31 close to the valve core 321. The valve core 321 can be clamped and matched with the clamping member 311. For example, the clamping member 311 defines a clamping groove, and the end of the valve core 321 has an end plate, and the end plate can be clamped into the clamping groove, which is convenient for the cooperation between the first movable member 31 and the valve core 321, and at the same time, the valve core 321 can drive the first movable member 31 to move when the valve core 321 moves.

[0050] In some embodiments, the seat belt retractor 100 further includes: a first monitoring device disposed on one side of the first electromagnetic locking device 30, configured to identify the position of the valve core 321 or the first movable member 31, and then transmit the position information of the valve core 321 or the first movable member 31 to the control device, so as to improve the reliability of the seat belt retractor 100.

[0051] For example, the monitoring device monitors that when the valve core 321 is in the ejected position, it is recorded as 1, and when it is in the attracted position, it is recorded as 0, and then transmits this signal to the control device. When the control device receives the signal 1, at this time the first electromagnetic driving member 32 is in the power-off state, then the control device should issue a power-on signal next time; conversely, when the control device receives the signal 0, at this time the first electromagnetic driving member 32 is in the power-on and attracted state, then the control device should issue a power-off signal next time. Through the above operations, the risk of control logic errors can be reduced, and the design reliability can be further increased.

[0052] For another example, the monitoring device monitors that when the first movable member 31 is in the second position, it is recorded as 1, and when it is in the first position, it is recorded as 0, and then transmits this signal to the control device. When the control device receives the signal 1, at this time the first electromagnetic driving member 32 is in the power-off state, then the control device should issue a power-on signal next time; conversely, when the control device receives the signal 0, at this time the first electromagnetic driving member 32 is in the power-on and attracted state, then the control device should issue a power-off signal next time. Through the above operations, the risk of control logic errors can be reduced, and the design reliability can be further increased.

[0053] As Figures 2-4 shown, in some embodiments, the second electromagnetic locking device 40 includes: a second movable member 41 and a second electromagnetic driving member 42. The second movable member 41 has second limiting teeth 411; the second electromagnetic driving member 42 cooperates with the second movable member 41 to drive the second movable member 41 to move. For example, the second movable member 41 can move between a third position and a fourth position in a rotational form or a translational form, so that the second limiting teeth 411 cooperate with or disengage from the ratchet 11.

[0054] Among them, as Figure 2 and Figure 4 shown, in the power-off state of the second electromagnetic driving member 42, the second movable member 41 is located at the third position, and the second limiting teeth 411 are disengaged from the ratchet 11, as Figure 3As shown, when the second electromagnetic driving member 42 is energized, the second movable member 41 moves to the fourth position, so that the second limiting teeth 411 can cooperate with the ratchet wheel 11. The second electromagnetic locking device 40 can be used to control the retracting action of the retractor body 10. For example, the sensing device senses the tilt angle and acceleration change signals of the vehicle and transmits the signals to the control device. The control device judges the dangerous situation by comparing the signals with the set threshold values. When a dangerous situation occurs, the control device issues a command signal to control the energization of the second electromagnetic locking device 40. The second movable member 41 moves to the fourth position, and the second limiting teeth 411 cooperate with the ratchet wheel 11 to realize the locking of the seat belt.

[0055] In some embodiments, the seat belt retractor 100 further includes: a second monitoring device. The second monitoring device is provided on one side of the second electromagnetic locking device 40 and is used to identify the position of the second movable member 41, and then can transmit the position information of the second movable member 41 to the control device to improve the reliability of the seat belt retractor 100.

[0056] For example, when the second monitoring device monitors that the second movable member 41 is in the third position, it is recorded as 1, and when it is in the fourth position, it is recorded as 0, and then this signal is transmitted to the control device. When the control device receives the signal 1, at this time the second electromagnetic driving member 42 is in the power-off state, then the control device should issue a power-on signal next time; on the contrary, when the control device receives the signal 0, at this time the second electromagnetic driving member 42 is in the power-on and attracted state, then the control device should issue a power-off signal next time. Through the above operations, the risk of control logic errors can be reduced, and the design reliability can be further increased.

[0057] As Figures 2-4 shown, in some embodiments, the mechanical locking device 20 includes a steel ball seat 24, a steel ball 22, a rotating member 23 and a first limiting tooth 21. The steel ball 22 is provided on the steel ball seat 24 and is used to sense the tilt angle and acceleration change signals of the vehicle. The rotating member 23 is rotatably provided on the steel ball seat 24. The rotating member 23 can rotate along with the movement of the steel ball 22, and the first limiting tooth 21 is provided on the rotating member 23.

[0058] Among them, a conical surface is provided inside the steel ball seat 24. The steel ball 22 can roll in any direction on the conical surface. The rotating member 23 is attached to the steel ball 22. By sensing the changes in the vehicle acceleration and tilt angle by the steel ball 22, the rotating member 23 is pushed to rotate when the threshold value is exceeded, so that the first limiting tooth 21 can cooperate with the ratchet wheel 11 to realize locking.

[0059] As Figures 2-5 shown, in some embodiments, the second electromagnetic locking device 40 and the mechanical locking device 20 are arranged at intervals along the circumferential direction of the ratchet wheel, and the first electromagnetic locking device 30 is located on one side of the mechanical locking device 20.

[0060] Due to the limitations of the internal space of the seat belt retractor 100, in order to make full and reasonable use of the internal space of the retractor, the second electromagnetic locking device 40 and the mechanical locking device 20 are arranged at intervals along the circumferential direction of the ratchet wheel 11. Among them, as Figures 2-4 shown, the second electromagnetic locking device 40 and the first electromagnetic locking device 30 can be respectively located on opposite sides of the mechanical locking device 20, which is convenient for wiring layout; as Figure 5 shown, the second electromagnetic locking device 40 can also be arranged above the ratchet wheel 11, and the first electromagnetic locking device 30 and the mechanical locking device 20 are arranged below the ratchet wheel 11, which can prevent the magnet inside the second electromagnetic locking device 40 from affecting the steel ball 22.

[0061] In some embodiments, the seat belt retractor 100 further includes: a control device and a sensing device. The control device is connected to the first electromagnetic locking device 30 and the second electromagnetic locking device 40. The control device can be a vehicle computer control module (ECU), or a separate control device, and is connected to the vehicle computer control module (ECU). The sensing device (such as a grating sensor or other sensors) is used to sense the tilt angle and acceleration change signals of the vehicle, and transmit the signals to the control device. The control device judges the dangerous situation by comparing the signals with the set threshold, and issues a command signal to control the first electromagnetic locking device 30 to be energized or de-energized, so as to inhibit and lock the mechanical locking device 20; and can issue a command signal to control the energization or de-energization of the second electromagnetic locking device 40, so that the second electromagnetic locking device 40 controls the retraction or locking of the retractor body 10.

[0062] That is to say, by using the sensing device to sense the external dangerous situation, such as signals of vehicle acceleration and deceleration or vehicle body position, etc.; the control device compares the set threshold with the sensed signal to determine whether to trigger the locking mechanism. When the control device judges that there is no danger, the first electromagnetic locking device 30 inhibits the action of the mechanical locking device 20. At this time, the seat belt can be normally pulled out and used, and at the same time, the vibration noise generated by the movement of the steel ball 22 during driving can also be reduced; when it is judged that a dangerous signal appears, the second electromagnetic locking device 40 is energized, and the second limiting tooth 411 cooperates with the ratchet wheel 11 for locking to restrict the movement of the passenger.

[0063] When both electromagnetic locking devices are de-energized or fail, the mechanical locking device 20 becomes effective, and can still lock the retractor body 10 in time in case of danger to protect the passengers.

[0064] The seatbelt retractor 100 according to an embodiment of the present utility model includes a retractor body 10 and a locking device of the seatbelt retractor 100 according to an embodiment of the present utility model. A ratchet wheel 11 is provided on the retractor body 10. By adopting the above locking device, through the combination of mechanical limitation and electromagnetic control, a flexible and safe seatbelt management solution is provided, which can meet different usage conditions, and at the same time, to a certain extent, suppress noise, improving the comfort and safety of use.

[0065] It should be noted that a mandrel for the seatbelt to wind around is usually further provided inside the retractor body 10. The ratchet wheel 11 is connected to one end of the mandrel, and the ratchet wheel 11 rotates synchronously with the mandrel; the retractor body 10 also has a housing, and the locking mechanism can be installed inside the housing.

[0066] The vehicle according to an embodiment of the present utility model includes the seatbelt retractor 100 according to an embodiment of the present utility model. By combining mechanical limitation and electromagnetic control, a flexible and safe seatbelt management solution is provided, which can meet different usage conditions, and at the same time, to a certain extent, suppress noise, improving the comfort and safety of use.

[0067] Next, in conjunction with Figures 1-5 Describe some specific embodiments according to the present utility model.

[0068] When the vehicle is driving normally, the sensing device senses the changes in the vehicle tilt angle and acceleration. When the control device receives the signal from the sensing device and determines that there is no danger at this time, the first electromagnetic driving member 32 is energized, and the valve core 321 retracts downward, driving the first moving member 31 to rotate counterclockwise to the first position, driving the rotating member 23 to rotate clockwise, thereby realizing the inhibition of the mechanical locking device 20 and inhibiting the movement of the steel ball 22; at this time, the second electromagnetic driving member 42 is de-energized, and the second moving member 41 closes and maintains at the third position.

[0069] When a dangerous situation occurs, the control device compares and determines the dangerous situation, and issues a command signal to control the second electromagnetic driving member 42 to be energized. The second moving member 41 pops out and moves to the fourth position, so that the second limiting tooth 411 meshes with the ratchet wheel 11, locking the retractor body 10, thereby realizing the function of restraining the passengers.

[0070] At this time, the first electromagnetic driving member 32 still remains energized, the moving member is in the first position, and the rotating member 23 rotates clockwise to inhibit the movement of the steel ball 22.

[0071] When the first electromagnetic locking device 30 and the second electromagnetic locking device 40 fail or lose power, the first electromagnetic driving member 32 loses power, the valve core 321 extends upward, drives the first movable member 31 to rotate clockwise to the second position, and the first movable member 31 can be spaced apart from the rotating member 23, canceling the inhibition of the mechanical locking device 20, and the mechanical locking device 20 becomes effective.

[0072] At the same time, the second electromagnetic driving member 42 loses power, and the second movable member 41 closes and maintains at the third position, so that the second limiting tooth 411 does not contact the ratchet wheel 11, and thus does not interfere with the normal use of the retractor body 10. Moreover, since the mechanical locking device 20 becomes effective at this time, by sensing changes in acceleration, tilt angle, etc. through the steel ball 22, the rotating member 23 and the first limiting tooth 21 can be pushed to move. In case of danger, through the engagement of the first limiting tooth 21 and the ratchet wheel 11, the retractor body 10 is locked, so as to achieve the function of restraining the passengers.

[0073] Other components and operations of the vehicle according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here. Among them, the up-down direction, left-right direction, and front-back direction are based on the up-down direction, left-right direction, and front-back direction shown in the figure.

[0074] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0075] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 invention. In this specification, the schematic descriptions 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.

[0076] Although the embodiments of the present invention 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 purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A locking device for a seat belt retractor, characterized in that, Comprising: Ratchet wheel; A locking mechanism, which is arranged on the outer periphery of the ratchet wheel and includes a mechanical locking device, a first electromagnetic locking device and a second electromagnetic locking device. The mechanical locking device has a first limiting tooth. The first electromagnetic locking device cooperates with the mechanical locking device. The first electromagnetic locking device is configured to limit the cooperation between the first limiting tooth and the ratchet wheel when powered on and cancel the limitation on the first limiting tooth when powered off. The second electromagnetic locking device has a second limiting tooth. The second electromagnetic locking device is configured that the second limiting tooth can cooperate with the ratchet wheel when powered on and the second limiting tooth is disengaged from the ratchet wheel when powered off.

2. The locking device of the seat belt retractor according to claim 1, characterized in that The first electromagnetic locking device includes: A first movable member, which is movably arranged on one side of the mechanical locking device; A first electromagnetic driving member, which has a valve core. The valve core cooperates with the first movable member to drive the first movable member to move between a first position and a second position. Wherein, in the powered-on state of the first electromagnetic locking device, the first movable member is located at the first position and the first movable member cooperates with the mechanical locking device. In the powered-off state of the first electromagnetic locking device, the first movable member is located at the second position and the first movable member is disengaged from the mechanical locking device.

3. The locking device of the seat belt retractor according to claim 2, characterized in that, The first movable member has a first rotating shaft, and the first movable member can rotate along the first rotating shaft between the first position and the second position so that the first movable member cooperates with or disengages from the mechanical locking device.

4. The locking device of the seat belt retractor according to claim 2, characterized in that, It further includes a return spring, which is connected to the first movable member. The return spring is configured to deform and store energy when the first movable member is at the first position to drive the first movable member to move to the second position when the first electromagnetic locking device is powered off.

5. The locking device of the seat belt retractor according to claim 2, wherein One side of the first movable member close to the valve core has a clamping member, and the valve core is adapted to be clamped and cooperate with the clamping member.

6. The locking device of the seat belt retractor according to claim 2, characterized in that, It further includes: A first monitoring device, which is arranged on one side of the first electromagnetic locking device for identifying the position of the valve core or the first movable member.

7. The locking device of the seat belt retractor according to claim 1, characterized in that, The second electromagnetic locking device includes: A second movable member, which has the second limiting tooth; A second electromagnetic driving member, which cooperates with the second movable member to drive the second movable member to move so that the second limiting tooth cooperates with or disengages from the ratchet wheel.

8. The locking device of the seat belt retractor according to claim 7, characterized in that, It further includes: A second monitoring device, which is arranged on one side of the second electromagnetic locking device for identifying the position of the second movable member.

9. The locking device of the seat belt retractor according to claim 1, characterized in that, The mechanical locking device includes a steel ball seat, a steel ball, a rotating member and the first limiting tooth. The steel ball is arranged on the steel ball seat for sensing the tilt angle and acceleration change signal of the vehicle. The rotating member is rotatably arranged on the steel ball seat and rotates with the movement of the steel ball. The first limiting tooth is arranged on the rotating member.

10. The locking device of the seat belt retractor according to any one of claims 1-9, characterized in that, The second electromagnetic locking device and the mechanical locking device are arranged at intervals along the circumferential direction of the ratchet wheel, and the first electromagnetic locking device is located on one side of the mechanical locking device.

11. The locking device of a seat belt retractor according to any one of claims 1-9, characterized in that, It further includes: A control device and a sensing device. The control device is connected to the first electromagnetic locking device and the second electromagnetic locking device. The sensing device is used to sense the inclination angle of the vehicle and the acceleration change signal, and transmit the signal to the control device. The control device judges the dangerous situation by comparing the signal with a set threshold value, and issues a command signal to control the energization or de-energization of the first electromagnetic locking device and the second electromagnetic locking device.

12. A seat belt retractor, characterized in that, It includes a retractor body and a locking device of the seat belt retractor according to any one of claims 1-11, and the ratchet wheel is arranged on the retractor body.

13. A vehicle, characterized in that, It includes the seat belt retractor according to claim 12.

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