Locking mechanism, safety belt retractor and vehicle

Abstract

The utility model relates to a locking mechanism, a safety belt retractor and a vehicle. The ratchet wheel is rotationally connected with the shell; the ball is movably arranged on one side of the ratchet wheel; the clamping jaw is movably arranged between the ratchet wheel and the ball; the first poking claw assembly is configured to poke the clamping claw in the first direction so that the clamping claw can reach a first preset position used for locking the ratchet wheel; and the second poking claw assembly is configured to poke the clamping claw in the second direction so that the clamping claw can reach a second preset position used for releasing the ratchet wheel. The locking mechanism, the safety belt retractor and the vehicle have the beneficial effects that the clamping jaw can be controlled to lock or release the ratchet wheel in an electric control mode so that the ratchet wheel can adapt to more application scenes.

Description

Technical Field

[0001] The present application relates to the field of vehicle safety technology, and in particular to a locking mechanism, a seat belt retractor and a vehicle. Background Art

[0002] The seat belt retractor is used to lock the seat belt in the event of an emergency in the vehicle so that the occupants can be effectively restrained in their seats to ensure their safety.

[0003] The mechanical vehicle sense of the current seat belt retractor relies on inertial force for triggering, which may result in unreasonable locking of the seat belt when the mechanical triggering conditions are met and the seat belt does not need to be locked, thus affecting the riding comfort or safety of passengers. Utility Model Content

[0004] The embodiments of the present application provide a locking mechanism, a seat belt retractor and a vehicle, which improve the adaptability of the locking mechanism to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a locking mechanism is provided, comprising:

[0006] case;

[0007] A ratchet wheel is rotatably connected to the housing;

[0008] A ball bearing is movably disposed on one side of the ratchet wheel;

[0009] A claw, movably disposed between the ratchet wheel and the ball;

[0010] A first pawl assembly, configured to push the pawl in a first direction so as to move the pawl to a first preset position for locking the ratchet;

[0011] The second pawl assembly is configured to push the pawl in a second direction so as to move the pawl to a second preset position for releasing the ratchet.

[0012] Optional,

[0013] The outer periphery of the ratchet wheel is provided with a plurality of ratchet teeth;

[0014] The pawl is provided with an embedding portion for embedding into the ratchet teeth to restrict the rotation of the ratchet wheel and a contact portion for contacting with the ball.

[0015] Optional,

[0016] The ball bearing is disposed between the first finger assembly and the second finger assembly.

[0017] Optional,

[0018] The jaw is rotatably connected to the housing; the rotation axis of the jaw is parallel to the rotation axis of the ratchet wheel.

[0019] Optionally,

[0020] The locking mechanism further includes:

[0021] A ball seat provided with a seat groove, and at least part of the ball is located in the seat groove;

[0022] Wherein, the ball seat is fixedly connected to the housing.

[0023] Optionally,

[0024] The ball seat includes:

[0025] A base portion forming the seat groove;

[0026] A bracket portion fixedly connected to the base portion;

[0027] Wherein, the jaw is rotatably connected to the bracket portion.

[0028] Optionally,

[0029] The bracket portion is disposed between the ratchet wheel and the base portion.

[0030] Optionally,

[0031] The contact portion of the jaw is provided with a contact groove disposed opposite to the seat groove.

[0032] Optionally,

[0033] The first pawl assembly includes:

[0034] A first electromagnetic device for generating a first magnetic field, and the first electromagnetic device is fixedly connected to the housing;

[0035] A first sliding core slidably connected to the first electromagnetic device, and the first sliding core generates a displacement under the action of the first magnetic field of the first electromagnetic device;

[0036] A first swing member rotatably connected to the housing, the first swing member is configured to swing under the drive of the first sliding core, and the first swing member can swing to dial the jaw to rotate in a first direction.

[0037] Optionally,

[0038] The locking mechanism further includes:

[0039] A first return spring for applying an elastic force to the first sliding core and / or the first swing member to reset them;

[0040] Wherein, one end of the first return spring is connected to the housing, and the other end is connected to the first sliding core and / or the first swinging member.

[0041] Optionally,

[0042] The second pawl assembly includes:

[0043] A second electromagnetic device for generating a second magnetic field, and the second electromagnetic device is fixedly connected to the housing;

[0044] A second sliding core, the second sliding core is slidably connected to the second electromagnetic device, and the second sliding core is configured to generate a displacement under the action of the second magnetic field of the second electromagnetic device;

[0045] A second swinging member, the second swinging member is rotatably connected to the housing, the second swinging member is configured to swing under the drive of the second sliding core, and the second swinging member can swing to dial the pawl to rotate in a second direction.

[0046] Optionally,

[0047] The locking mechanism further includes:

[0048] A second return spring for applying an elastic force to the second sliding core and / or the second swinging member to reset them;

[0049] Wherein, one end of the second return spring is connected to the housing, and the other end is connected to the second sliding core and / or the second swinging member.

[0050] Optionally,

[0051] The first pawl assembly includes:

[0052] A first electromagnetic device for generating a first magnetic field, and the first electromagnetic device is fixedly connected to the housing;

[0053] A first sliding core, the first sliding core is slidably connected to the first electromagnetic device, and the first sliding core generates a displacement under the action of the first magnetic field of the first electromagnetic device;

[0054] A first swinging member, the first swinging member is rotatably connected to the housing, the first swinging member is configured to swing under the drive of the first sliding core, and the first swinging member can swing to dial the pawl to rotate in a first direction;

[0055] The second pawl assembly includes:

[0056] A second electromagnetic device for generating a second magnetic field, the second electromagnetic device being fixedly connected to the housing;

[0057] A second sliding core, the second sliding core being slidably connected to the second electromagnetic device, the second sliding core being configured to displace under the action of the second magnetic field of the second electromagnetic device;

[0058] A second swing member, the second swing member being rotatably connected to the housing, the second swing member being configured to swing under the drive of the second sliding core, and the second swing member being able to swing to dial the claw to rotate in a second direction.

[0059] Optionally,

[0060] The rotation axis of the first swing member is parallel to the rotation axis of the second swing member.

[0061] Optionally,

[0062] The sliding direction of the first sliding core is perpendicular to the sliding direction of the second sliding core.

[0063] Optionally,

[0064] When both the first magnetic field and the second magnetic field disappear, the ball is configured to be able to drive the claw to move to the state of locking the ratchet under inertia.

[0065] Optionally,

[0066] When the first magnetic field and / or the second magnetic field exists, the claw is configured to release the state of the ratchet, and the ball is configured to be in a state of being limited by the claw.

[0067] According to a second aspect of the present application, there is also provided a seat belt retractor, including:

[0068] A retractor body and the locking mechanism according to the first aspect of the present application, the retractor body being used for retracting the seat belt, and the ratchet being fixedly connected to the retractor body.

[0069] According to a third aspect of the present application, there is also provided a vehicle including the seat belt retractor according to the second aspect of the present application.

[0070] The beneficial effects of the present application are as follows: A locking mechanism, a seat belt retractor and a vehicle are provided, which can control the locking of the seat belt by an electric control method to adapt to more application scenarios.

[0071] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0072] Two electromagnetic control devices are adopted to achieve locking and decoupling respectively, which can ensure the certainty of action execution; the two sliding cores adopt different sliding directions, thus ensuring that the electric control mechanism will not get stuck during execution.

[0073] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0075] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0076] Figure 1 is a perspective structural view of the locking mechanism provided in an exemplary embodiment of the present disclosure;

[0077] Figure 2 is Figure 1 a structural view of the illustrated embodiment observed from another perspective after removing the housing;

[0078] Figure 3 is Figure 1 a structural view of the illustrated ratchet wheel;

[0079] Figure 4 is Figure 1 a structural view of the ball part in the illustrated locking mechanism;

[0080] Figure 5 is Figure 1 a structural view of the first pawl assembly part in the illustrated locking mechanism;

[0081] Figure 6 is Figure 1 a structural view of the second pawl assembly part in the illustrated locking mechanism;

[0082] Figure 7 is Figure 1 a structural view of the illustrated locking mechanism in the locked state;

[0083] Figure 8 is Figure 1 a structural view of the illustrated locking mechanism in the inhibited state;

[0084] Figure 9 is Figure 1Schematic structural diagram of the locking mechanism in the decoupled state;

[0085] Figure 10 is a schematic structural diagram of a vehicle provided in an exemplary embodiment of the present disclosure.

[0086] Description of reference numerals:

[0087] 1. Vehicle;

[0088] 10. Seat belt retractor;

[0089] 100. Locking mechanism;

[0090] 110. Housing; 110a. First positioning post; 110b. Second positioning post;

[0091] 120. Ratchet; 121. Ratchet teeth;

[0092] 130. Ball;

[0093] 140. Pawl; 141. Embedded part; 142. Contact part;

[0094] 150. First pawl assembly; 151. First electromagnetic device; 152. First sliding core; 153. First swinging member; 153a. First clamping part; 153b. First rotating shaft part; 153c. First touching part; 153d. First movable post;

[0095] 160. Second pawl assembly; 161. Second electromagnetic device; 162. Second sliding core; 163. Second swinging member; 163a. Second clamping part; 163b. Second rotating shaft part; 163c. Second touching part; 163d. Second movable post;

[0096] 170. First return spring;

[0097] 180. Second return spring;

[0098] 190. Ball seat; 191. Base part; 191a. Seat groove; 192. Bracket part. Detailed implementation manners

[0099] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0100] Refer to Figures 1 to 9As shown in the figure, the present application provides a locking mechanism 100, which is applicable to a seat belt retractor 10. The locking mechanism 100 includes: a housing 110, a ratchet wheel 120, a ball 130, a pawl 140, a first pawl assembly 150, a second pawl assembly 160, a first return spring 170, a second return spring 180, a ball seat 190, etc.

[0101] The housing 110 forms an inner housing space; the ratchet wheel 120 is rotatably connected to the housing 110; the ball 130 is movably arranged on one side of the ratchet wheel 120; the pawl 140 is movably arranged between the ratchet wheel 120 and the ball 130; the first pawl assembly 150 is configured to move the pawl 140 in a first direction so that the pawl 140 reaches a first preset position for locking the aforementioned ratchet wheel 120; the second pawl assembly 160 is configured to move the pawl 140 in a second direction so that the pawl 140 reaches a second preset position for releasing the aforementioned ratchet wheel 120.

[0102] It can be understood that the ball 130 and the pawl 140 are locking parts with a mechanical vehicle feeling. By moving the pawl 140 in the first direction through the first pawl assembly 150 so that the pawl 140 reaches the first preset position for locking the ratchet wheel 120, the seat belt can be locked under the control of the vehicle controller; by moving the pawl 140 in the second direction through the second pawl assembly 160 so that the pawl 140 reaches the second preset position for releasing the ratchet wheel 120, the seat belt can be released under the control of the vehicle controller. In this way, in some specific application scenarios, for example, when the mechanical vehicle feeling trigger condition is met and the seat belt does not need to be locked, the second pawl assembly 160 can be used to move the pawl 140 to the second preset position for releasing the ratchet wheel 120. At this time, the ratchet wheel 120 can rotate normally, and thus the webbing of the seat belt can be pulled out normally.

[0103] Specifically, for example, in a vehicle with automatic driving, the seat back and seat cushion under the zero-gravity seat can be adjusted to a large angle and rotate 360 degrees as a whole, exceeding the vehicle-sensing locking limit angle. The second claw assembly 160 allows the claw 140 to move to the second preset position of the release ratchet 120, preventing the seat belt from locking, so that the backrest can be further rotated or the occupant can wear the seat belt normally, thereby improving the passenger comfort and safety; and when the vehicle is parked at a location with a large slope, the posture of the vehicle body may cause the vehicle to lock, but in fact the vehicle is only parked. At this time, the second claw assembly 160 allows the claw 140 to move to the second preset position of the release ratchet 120, thereby preventing the seat belt from locking. The second preset position of 120 prevents the seat belt from being locked, so that when the vehicle needs to be started again, the seat belt can be pulled out normally to reduce the safety risk; for example, in the off-road mode of the vehicle, low-speed creeping is likely to occur, and the vehicle may be accelerated and decelerated multiple times in a short period of time during the escape process. In this case, because it is a low-speed state, the danger is usually low, but it is easy to cause the vehicle to feel continuously locked, and then strangle the occupants, causing complaints from the occupants and poor comfort. At this time, the second pawl assembly 160 is used to move the claw 140 to the second preset position of the release ratchet 120 to prevent the seat belt from being locked, which can improve the passenger experience in this application scenario.

[0104] In addition, the ratchet 120 is locked and released by two pusher claw assemblies, thereby ensuring the certainty of the action execution; the two pusher claw assemblies push the claw 140 in different directions, thereby ensuring that the electric control mechanism will not get stuck during execution.

[0105] The outer periphery of the ratchet 120 is provided with a plurality of ratchet teeth 121; the pawl 140 is provided with an embedding portion 141 for embedding the ratchet teeth 121 to limit the rotation of the ratchet 120 and a contact portion 142 for contacting the ball 130; the ball 130 is arranged between the first pawl assembly 150 and the second pawl assembly 160 so that the first pawl assembly 150 and the second pawl assembly 160 respectively push the pawl 140 to a first preset position for locking the ratchet 120 and a second preset position for releasing the ratchet 120.

[0106] By adopting the above solution, the seat belt retractor 10 can lock or release the seat belt under the control of the vehicle controller according to the specific application scenario of the vehicle, thereby meeting the requirements of various application scenarios. At the same time, when the vehicle's electronic control fails and the mechanical triggering condition is met, the ball 130 triggers the locking of the seat belt to increase safety.

[0107] In particular, the use of two groups of pusher claw assemblies can place the claw 140 in more states so that the seat belt retractor 10 has more control states for the seat belt.

[0108] Specifically, the housing 110 can be the outer shell of the seat belt retractor 10 or a housing structure fixedly connected to the outer shell of the seat belt retractor 10.

[0109] The ratchet wheel 120 is non-rotatably connected to the tape reel of the seat belt retractor 10, that is, the ratchet wheel 120 rotates synchronously with the tape reel (not shown in the figure, the same below). Locking the rotation of the ratchet wheel 120 is equivalent to locking the tape reel. The tape reel is used for winding the seat belt. Therefore, the locking and releasing of the seat belt can be achieved by locking and releasing the tape reel.

[0110] In some embodiments of the present application, the ball 130 is configured as a spherical steel ball, so that the inertia it receives in all directions is relatively consistent.

[0111] In some embodiments of the present application, the pawl 140 is rotatably connected to the housing 110; the rotation axis of the pawl 140 is parallel to the rotation axis of the ratchet wheel 120. This is an optimal solution both in terms of locking and preventing movement interference.

[0112] In some embodiments of the present application, the locking mechanism 100 further includes a ball seat 190. The ball seat 190 is provided with a seat groove 191a, and at least a part of the ball 130 is located in the seat groove 191a, that is, the ball seat 190 forms a seat groove 191a that restricts the position of the ball 130; wherein, the ball seat 190 is fixedly connected to the housing 110.

[0113] The ball seat 190 includes: a base portion 191 and a support portion 192. The base portion 191 and the support portion 192 are fixedly connected. The pawl 140 is rotatably connected to the support portion. Among them, the base portion 191 is used to form the seat groove 191a; the support portion 192 is used to form a support shaft hole; wherein, the pawl 140 is formed with a rotating shaft portion that can extend into the support shaft hole so that the pawl 140 is rotatably connected to the ball seat 190.

[0114] Using the ball seat 190 can form a groove that can better adapt to the shape of the ball 130, that is, the seat groove 191a, so as to effectively set the threshold conditions for mechanical triggering. As a structural reuse, the ball seat 190 can also rotatably connect the pawl 140 through the support portion 192.

[0115] As a specific solution, the support portion 192 can be arranged between the ratchet wheel 120 and the base portion 191.

[0116] In order to better maintain the position of the ball 130 or enable the ball 130 to effectively drive the pawl 140, the contact portion 142 of the pawl 140 is provided with a contact groove (not shown in the figure, the same below) that is arranged opposite to the seat groove 191a. The term "opposite" here means that the depression directions of the seat groove 191a and the contact groove are substantially opposite.

[0117] In some embodiments of the present application, the first pawl assembly 150 includes: a first electromagnetic device 151, a first sliding core 152, and a first swinging member 153.

[0118] The first electromagnetic device 151 is configured to generate a first magnetic field, and the first electromagnetic device 151 is fixedly connected to the housing 110; the first sliding core 152 is slidably connected to the first electromagnetic device 151, and at least a part of the first sliding core 152 is made of a magnetic material and is displaced under the action of the first magnetic field of the first electromagnetic device 151; the first swinging member 153 is rotatably connected to the housing 110, and the first swinging member 153 is configured to swing under the drive of the first sliding core 152, and the first swinging member 153 can swing to rotate the pawl 140 in a first direction.

[0119] More specifically, the first electromagnetic device 151 is fixedly connected to the housing 110; the first sliding core 152 is slidably connected to the first electromagnetic device 151; the first swinging member 153 is rotatably connected to the housing 110 so as to be able to rotate the pawl 140, that is, a movable connection is formed between the first swinging member 153 and the pawl 140, and the pawl 140 rotates correspondingly as the first swinging member 153 swings. When the pawl 140 follows the first swinging member 153 to rotate, the pawl 140 contacts the first swinging member 153. When the pawl 140 does not follow the first swinging member 153 to rotate, the two may or may not contact.

[0120] The first electromagnetic device 151 can be any device that converts electrical energy into magnetic energy, such as an electromagnetic relay or an electromagnet in other forms.

[0121] In some embodiments of the present application, the second pawl assembly 160 includes: a second electromagnetic device 161, a second sliding core 162, and a second swinging member 163.

[0122] The second electromagnetic device 161 is configured to generate a second magnetic field, and the second electromagnetic device 161 is fixedly connected to the housing 110; at least a part of the second sliding core 162 is made of a magnetic material, the second sliding core 162 is slidably connected to the second electromagnetic device 161, and is configured to be displaced under the action of the second magnetic field of the second electromagnetic device 161; the second swinging member 163 is rotatably connected to the housing 110, and the second swinging member 163 is configured to swing under the drive of the second sliding core 162, and the second swinging member 163 can swing to rotate the pawl 140 in a second direction.

[0123] More specifically, the second electromagnetic device 161 is fixedly connected to the housing 110; the second sliding core 162 is slidably connected to the second electromagnetic device 161; the second swinging member 163 is rotatably connected to the housing 110 so as to be able to toggle the claw 140, that is, a movable connection is formed between the second swinging member 163 and the claw 140. The claw 140 rotates correspondingly with the swing of the second swinging member 163. When the claw 140 follows the second swinging member 163 to rotate, the claw 140 contacts the second swinging member 163. When the claw 140 does not follow the second swinging member 163 to rotate, the two may or may not contact each other.

[0124] The second electromagnetic device 161 can be any device that converts electrical energy into magnetic energy, such as an electromagnetic relay or an electromagnet in other forms.

[0125] In some embodiments of the present application, the first return spring 170 is used to apply an elastic force to the first sliding core 152 and / or the first swinging member 153 to reset them; one end of the first return spring 170 is connected to the housing 110, and the other end is connected to the first sliding core 152 and / or the first swinging member 153.

[0126] In some embodiments of the present application, the second return spring 180 is used to apply an elastic force to the second sliding core 162 and / or the second swinging member 163 to reset them; one end of the second return spring 180 is connected to the housing 110, and the other end is connected to the second sliding core 162 and / or the second swinging member 163.

[0127] Refer to Figures 1 to 2 As shown, as a specific solution, the first return spring 170 is directly connected to the first swinging member 153, and the second return spring 180 is directly connected to the second swinging member 163. Although the resistance of the first sliding core 152 and the second sliding core 162 also needs to be overcome in this way, the elastic force is applied more directly.

[0128] As a specific solution, a first positioning post 110a and a second positioning post 110b are formed inside the housing 110. The first swinging member 153 is formed with a first movable post 153d, and the second swinging member 163 is formed with a second movable post 163d. Hanging rings are provided at both ends of the first return spring 170 and the second return spring 180. The two hanging rings of the first return spring 170 are respectively sleeved on the first positioning post 110a and the first movable post 153d; the two hanging rings of the second return spring 180 are respectively sleeved on the second positioning post 110b and the second movable post 163d.

[0129] In some embodiments of the present application, the rotation axis of the first swinging member 153 is parallel to the rotation axis of the second swinging member 163; the sliding direction of the first sliding core 152 is parallel to and different from the sliding direction of the second sliding core 162.

[0130] Reference Figure 1 and Figure 2 As shown, as a specific solution, the sliding direction of the first sliding core 152 intersects perpendicularly with the sliding direction of the second sliding core 162. Using different sliding directions can make the claw 140 subject to forces in different directions, thereby avoiding the occurrence of jamming, because the mutually perpendicular sliding directions can generate enough multi-directional force components to avoid the situation where the forces are equal and offset and thus jamming.

[0131] Reference Figure 2 , Figures 5 to 6 As shown, the first swinging member 153 of the present application includes: a first clamping portion 153a, a first rotating shaft portion 153b and a first contact portion 153c. Among them, the first clamping portion 153a is formed with a clamping groove so as to form a movable connection with the first sliding core 152; the first rotating shaft portion 153b is used to form a rotating pair with the housing 110 to form a rotating connection; the first contact portion 153c is used to contact the claw 140 so as to drive the claw 140 to rotate. It should be noted that the first contact portion 153c has no fixed connection with the claw 140, that is, the first contact portion 153c has no effect on the freedom of the claw 140 after rotating out of a specific position, which is also the reason why the mechanical trigger can still work after the electric control fails.

[0132] Similarly, refer to Figure 2 , Figures 5 to 6 As shown, the second swinging member 163 of the present application includes: a second clamping portion 163a, a second rotating shaft portion 163b and a second contact portion 163c. Among them, the second clamping portion 163a is formed with a clamping groove so as to form a movable connection with the second sliding core 162; the second rotating shaft portion 163b is used to form a rotating pair with the housing 110 to form a rotating connection; the second contact portion 163c is used to contact the claw 140 so as to drive the claw 140 to rotate. It should be noted that the second contact portion 163c has no fixed connection relationship with the claw 140, that is, the second contact portion 163c has no effect on the freedom of the claw 140 after rotating out of a specific position, which is also the reason why the mechanical trigger can still work after the electric control fails.

[0133] Of course, in order to adapt to different structures, the specific shapes of the first swing member 153 and the second swing member 163 can be configured according to requirements.

[0134] Reference Figures 7 to 9 As shown, the locking mechanism 100 of the present application has three states: Figure 7 The display shows the locked state. Figure 8 Shown is the inhibited state, Figure 9 The decoupled state (or decoupled state) is shown.

[0135] Among them, the locked state is the state when the seat belt is locked. The inhibited state is when the pawl 140 releases the ratchet 120, and the pawl 140 can inhibit the ball 130 for positioning. In this state, the seat belt can be pulled out, but the noise generated by the ball 130 is reduced by the inhibition of the pawl 140 on the ball 130. The decoupled state is the state where the ball 130 can drive the pawl 140 to move to lock the ratchet 120 under the action of inertia. In this state, the mechanical vehicle feeling resumes its function, so as to ensure that when both the first magnetic field and / or the second magnetic field disappear, the mechanical trigger can still work, further improving the reliability of the locking mechanism.

[0136] When the vehicle is driving normally, the sensing device (sensor) senses the changes in the tilt angle and acceleration. When the control device such as (ECU) receives the signal from the sensor and determines that there is no danger at this time, the first electromagnetic device 151 is powered off → the first sliding core 152 extends to the right (pops out) → driven by the reset action of the first return spring 170, the first swing member 153 rotates counterclockwise around the fulcrum; the second electromagnetic device 161 is powered on → the second sliding core 162 retracts downward (sucks in) → drives the second swing member 163 to rotate counterclockwise around the fulcrum → drives the pawl 140 to rotate downward, thereby realizing the inhibition of the mechanical vehicle feeling and inhibiting the rotation of the ball 130.

[0137] When the sensor determines that a dangerous situation occurs, the second electromagnetic device 161 is powered off → the second sliding core 162 extends upward → the second swing member 163 is lifted by rotating clockwise around the fulcrum under the action of the second return spring 180; the first electromagnetic device 151 is powered on → the first sliding core 152 retracts to the left → drives the first swing member 153 to rotate clockwise around the fulcrum, driving the pawl 140 to rotate upward to engage with the ratchet teeth. Thus, the restraint of the occupant is completed.

[0138] When the first electromagnetic device 151 and the second electromagnetic device 161 fail or are powered off, that is, when both the first magnetic field and the second magnetic field disappear, the first electromagnetic device 151 is powered off → the first sliding core 152 extends to the right → the first swing member 153 is lifted by rotating counterclockwise around the fulcrum under the reset action of the first return spring 170; the second electromagnetic device 161 is powered off → the second sliding core 162 extends upward → the second swing member 163 is lifted by rotating clockwise around the fulcrum under the reset action of the second return spring 180.

[0139] At this time, it returns to the mechanical vehicle feeling. The ball 130 is configured to be able to drive the pawl to move to the state of locking the ratchet 120 under the action of inertia, such as sensing the acceleration change through the ball 130 and then pushing the pawl to achieve locking.

[0140] This solution controls the mechanical vehicle feeling by using two electromagnetic devices to achieve active locking. Therefore, it can meet the working conditions of zero-gravity seats, large-angle adjustment of seats, and suppression of vehicle feeling noise, further improving the use comfort. At the same time, when power is off or a fault occurs, the ECU controls the two electromagnetic devices to power off simultaneously, and the mechanical vehicle feeling takes effect. At this time, the seat belt can still be locked.

[0141] Meanwhile, at a higher level, to ensure reliability and increase design redundancy, a position monitoring device (not marked in the figure, the same below), such as a grating, can be added at the sliding core; it is used to identify whether the sliding core is in the attracted or ejected position at this time.

[0142] Specifically, when the monitoring device monitors that the sliding core is in the ejected position, it is recorded as 1, and when it is in the attracted position, it is recorded as 0. Then this signal is transmitted to the control unit ECU. When the ECU receives the signal 1, at this time the electromagnetic device is in the powered-off and ejected state, then the next time the ECU should send a power-on signal; on the contrary, when the ECU receives the signal 0, at this time the electromagnetic device is in the powered-on and attracted state, then the next time the ECU should send a power-off signal. Through the above operations, the risk of control logic errors can be reduced, and the design reliability can be further increased.

[0143] An embodiment of the present application further provides a seat belt retractor 10, including a retractor body and the locking mechanism 100 described above in the present application. The retractor body is used to retract the seat belt, and the ratchet 120 is fixedly connected to the retractor body.

[0144] An embodiment of the present application further provides a vehicle 1, including the seat belt retractor 10 described above in the present application.

[0145] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0146] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0147] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0148] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A locking mechanism, characterized in that, Comprising: A housing (110); A ratchet wheel (120) rotatably connected to the housing (110); A ball (130) movably disposed on one side of the ratchet wheel (120); A pawl (140) movably disposed between the ratchet wheel (120) and the ball (130); A first pawl assembly (150) configured to move the pawl (140) in a first direction to move the pawl (140) to a first preset position for locking the ratchet wheel (120); A second pawl assembly (160) configured to move the pawl (140) in a second direction to move the pawl (140) to a second preset position for releasing the ratchet wheel (120).

2. The locking mechanism according to claim 1, characterized in that A plurality of ratchet teeth (121) are provided on the outer periphery of the ratchet wheel (120); The pawl (140) is provided with an embedding portion (141) for embedding the ratchet teeth (121) to limit the rotation of the ratchet wheel (120) and a contact portion (142) for contacting the ball (130).

3. The locking mechanism according to claim 1, characterized in that The ball (130) is disposed between the first pawl assembly (150) and the second pawl assembly (160).

4. The locking mechanism according to claim 1, characterized in that The pawl (140) is rotatably connected to the housing (110); the rotation axis of the pawl (140) is parallel to the rotation axis of the ratchet wheel (120).

5. The locking mechanism according to claim 4, characterized in that The locking mechanism (100) further comprises: A ball seat (190) provided with a seat groove (191a), at least a part of the ball (130) being located in the seat groove (191a); Wherein, the ball seat (190) is fixedly connected to the housing (110).

6. The locking mechanism according to claim 5, characterized in that The ball seat (190) comprises: A base portion (191) forming the seat groove (191a); A bracket portion (192) fixedly connected to the base portion (191); Wherein, the pawl (140) is rotatably connected to the bracket portion (192).

7. The locking mechanism according to claim 6, characterized in that The bracket portion (192) is disposed between the ratchet wheel (120) and the base portion (191).

8. The locking mechanism according to claim 5, characterized in that The contact portion (142) of the pawl (140) is provided with a contact groove disposed opposite to the seat groove (191a).

9. The locking mechanism according to any one of claims 1 to 8, characterized in that The first pawl assembly (150) comprises: A first electromagnetic device (151) for generating a first magnetic field, the first electromagnetic device (151) being fixedly connected to the housing (110); A first sliding core (152), wherein the first sliding core (152) is slidably connected to the first electromagnetic device (151), and the first sliding core (152) is displaced under the action of a first magnetic field of the first electromagnetic device (151); A first swinging member (153), the first swinging member (153) is rotatably connected to the housing (110), the first swinging member (153) is configured to swing under the drive of the first sliding core (152), and the first swinging member (153) can drive the claw (140) to rotate in a first direction by swinging.

10. The locking mechanism according to claim 9, characterized in that: The locking mechanism also includes: A first return spring (170) is used to apply an elastic force to the first sliding core (152) and / or the first swinging member (153) to return them to their original positions; Wherein, one end of the first return spring (170) is connected to the housing (110), and the other end is connected to the first sliding core (152) and / or the first swinging member (153).

11. The locking mechanism according to any one of claims 1 to 8, characterized in that: The second finger assembly (160) comprises: A second electromagnetic device (161) for generating a second magnetic field, wherein the second electromagnetic device (161) is fixedly connected to the housing (110); A second sliding core (162), wherein the second sliding core (162) is in sliding connection with the second electromagnetic device (161), and the second sliding core (162) is configured to generate displacement under the action of a second magnetic field of the second electromagnetic device (161); A second swinging member (163), the second swinging member (163) is rotatably connected to the housing (110), the second swinging member (163) is configured to swing under the drive of the second sliding core (162), and the second swinging member (163) can drive the claw (140) to rotate in a second direction by swinging.

12. The locking mechanism according to claim 11, characterized in that: The locking mechanism also includes: A second return spring (180) is used to apply an elastic force to the second sliding core (162) and / or the second swinging member (163) to return them to their original position; Wherein, one end of the second return spring (180) is connected to the housing (110), and the other end is connected to the second sliding core (162) and / or the second swinging member (163).

13. The locking mechanism according to any one of claims 1 to 8, characterized in that: The first finger assembly (150) comprises: A first electromagnetic device (151) for generating a first magnetic field, wherein the first electromagnetic device (151) is fixedly connected to the housing (110); A first sliding core (152), wherein the first sliding core (152) is slidably connected to the first electromagnetic device (151), and the first sliding core (152) is displaced under the action of a first magnetic field of the first electromagnetic device (151); A first swinging member (153), the first swinging member (153) being rotatably connected to the housing (110), the first swinging member (153) being configured to swing under the drive of the first sliding core (152), and the first swinging member (153) can drive the claw (140) to rotate in a first direction by swinging; The second finger assembly (160) comprises: A second electromagnetic device (161) for generating a second magnetic field, wherein the second electromagnetic device (161) is fixedly connected to the housing (110); A second sliding core (162), wherein the second sliding core (162) is in sliding connection with the second electromagnetic device (161), and the second sliding core (162) is configured to generate displacement under the action of a second magnetic field of the second electromagnetic device (161); A second swinging member (163), the second swinging member (163) is rotatably connected to the housing (110), the second swinging member (163) is configured to swing under the drive of the second sliding core (162), and the second swinging member (163) can drive the claw (140) to rotate in a second direction by swinging.

14. The locking mechanism according to claim 13, characterized in that: The rotation axis of the first swing member (153) is parallel to the rotation axis of the second swing member (163).

15. The locking mechanism according to claim 13, characterized in that: The sliding direction of the first sliding core (152) is perpendicular to the sliding direction of the second sliding core (162).

16. The locking mechanism according to claim 13, characterized in that: When both the first magnetic field and the second magnetic field disappear, the ball (130) is configured to be able to drive the claw (140) to move to a state of locking the ratchet (120) under the action of inertia.

17. The locking mechanism according to claim 13, characterized in that: When the first magnetic field and / or the second magnetic field exist, the claw (140) is configured to release the ratchet (120), and the ball (130) is configured to be in a state of being limited by the claw (140).

18. A seat belt retractor, characterized in that, It comprises a retractor body and a locking mechanism (100) according to any one of claims 1 to 17, wherein the retractor body is used for retracting a safety belt, and the ratchet (120) is fixedly connected to the retractor body.

19. A vehicle, characterized in that, It comprises the seat belt retractor (10) as claimed in claim 18.

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