Directional pull-out type safety belt retractor

Abstract

The utility model discloses a directional pull-out type safety belt retractor which comprises a shell frame, a mandrel is arranged on the shell frame in a rotating mode, one end of the mandrel is connected with a coil spring assembly, a ratchet wheel is arranged at the other end corresponding to the mandrel, a locking assembly is arranged between the ratchet wheel and the mandrel, and ratchets are arranged at the end of one side of the ratchet wheel in a surrounding mode. A first swing arm is movably arranged on the shell frame, a clamping jaw is arranged at one end of the first swing arm and can clamp the ratchet, a magnetic block is arranged at the other end of the first swing arm, an electromagnetic coil is arranged at the position, close to the magnetic block, of the shell frame, and the automobile condition balance sensor can feed back information to the controller. The controller can control electrification of the electromagnetic coil to attract or repel the magnetic block so as to drive the first swing arm to swing. Automatic control locking of the retractor can be achieved according to the vehicle condition, the retractor can be pulled out only when the vehicle is kept in the set direction, and safety is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety belt equipment, concretely relates to a directional pull-out type safety belt retractor. BACKGROUND

[0002] The retractor is an important component of the safety belt assembly, which mainly plays the roles of winding and pulling out the safety belt, and locking the safety belt when the vehicle is braked in emergency. When the vehicle is braked in emergency, the occupant will cause the safety belt to be rapidly and violently stretched. At this moment, the self-locking function of the retractor can instantly lock the safety belt, so that the occupant is tightly attached to the seat, thereby avoiding falling out of the vehicle or being injured by collision. At present, the traditional retractor is generally provided with a locking assembly. In actual use, when the vehicle is strongly jolted or tilted, the traditional locking assembly may not be able to sense and lock the safety belt. Therefore, some retractor that can sense the jolt or tilt of the vehicle appears on the market. However, the retractor generally adopts a mechanical structure, which has the problems of poor sensing sensitivity and difficulty in electrically controlling and adjusting in actual use, resulting in poor use experience. SUMMARY

[0003] In view of the deficiencies in the background art, the technical problem to be solved by the utility model is to provide a directional pull-out type safety belt retractor for solving the above problems.

[0004] To this end, the utility model is implemented by adopting the following scheme:

[0005] A directional pull-out type safety belt retractor, comprising a housing frame, a mandrel rotatably arranged on the housing frame, the mandrel being connected with a coil spring assembly at one end, and a ratchet wheel being arranged at the other end of the mandrel, a locking assembly being arranged between the ratchet wheel and the mandrel, characterized in that: a ratchet tooth is annularly arranged at the end of one side of the ratchet wheel, a first swing arm is movably arranged on the housing frame, a pawl is arranged at one end of the first swing arm, the pawl can lock the ratchet tooth, a magnetic block is arranged at the other end of the first swing arm, an electromagnetic coil is arranged on the housing frame near the magnetic block, and a vehicle condition balance sensor is further included, the vehicle condition balance sensor can feed back information to a controller, the controller can control the electromagnetic coil to attract or repel the magnetic block, thereby driving the first swing arm to swing.

[0006] The other end of the mandrel is integrally provided with a rotating part, the locking assembly comprises a locking block movably arranged in the rotating part, an elastic hook is arranged between the locking block and the rotating part, a transmission pin is arranged on the locking block, the transmission pin is clamped into a transmission groove on a ratchet wheel, a clamping tooth for clamping the locking block is arranged on the shell frame, a second swing arm is arranged on the ratchet wheel, a first spring is tightly pressed on one end of the second swing arm, a first positioning block and a second positioning block are arranged on the other end of the second swing arm corresponding to the ratchet wheel, a limiting cover is arranged on one side of the ratchet wheel, a limiting tooth is arranged in the limiting cover, and one end of the second swing arm can be clamped into the limiting tooth.

[0007] The vehicle condition balance inductor is arranged in the vehicle body.

[0008] The shell frame is provided with a spherical cover on the outer side corresponding to the electromagnetic coil, and a magnetic yoke is arranged on the inner wall of the spherical cover.

[0009] The above technical solution is a directional pull-out type safety belt retractor, a vehicle condition inductor is arranged to induct the driving condition of the vehicle, whether the vehicle is in a bumping, rollover or other situation can be accurately detected, and the retractor is automatically controlled according to the detected information to lock the safety belt, which provides another insurance for the safety belt retractor, ensures that the safety belt can be pulled out only when the vehicle is kept in a normal driving set direction, and compared with a traditional mechanical locking structure, the safety belt locking condition can be adjusted, the use is more flexible and humanized, the safety belt retractor is more suitable for modern new energy vehicles, and better driving and riding experiences are improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 It is a structural schematic view of the utility model;

[0012] Figure 2 It is a structural view of the limiting cover of the utility model;

[0013] Figure 3 It is Figure 1 The view of another perspective after removing the limiting cover;

[0014] Figure 4 It is Figure 3 The view after removing the ratchet wheel. DETAILED DESCRIPTION

[0015] As shown in the figure, the utility model discloses a kind of directional pull-out type safety belt retractor, including shell frame 1, shell frame 1 is rotatably provided with mandrel 3, one end of mandrel 3 is connected with spring assembly 2, another end of corresponding mandrel 3 is provided with ratchet 18, locking assembly is provided between ratchet 18 and mandrel 3, characterized by: the end portion of one side of ratchet 18 is peripherally provided with ratchet teeth 10, first swing arm 5 is movably provided on shell frame 1, one end of first swing arm 5 is provided with dog 11, dog 11 can be deadlocked ratchet teeth 10, the other end of first swing arm 5 is provided with magnetic block 6, electromagnetic coil 7 is provided on shell frame 1 close to magnetic block 6, further including vehicle condition balance inductor, vehicle condition balance inductor can feedback information to controller, controller can control the power-on attraction or repulsion of electromagnetic coil 7 magnetic block 6 in turn to drive first swing arm 5 to swing.

[0016] Further, the other end of mandrel 3 is integrally provided with rotating part 19, locking assembly includes locking block 20 movably provided in rotating part 19, elastic hook 22 is provided between locking block 20 and rotating part 19, transmission pin 15 is provided on locking block 20, transmission pin 15 is clamped into transmission groove 16 on ratchet 18, clamping tooth 21 for clamping locking block 20 is provided on shell frame 1, second swing arm 14 is provided on ratchet 18, first spring 17 is tightly pressed on one end of second swing arm 14, first positioning block 12 and second positioning block 13 are provided on the other end of ratchet 18 corresponding to second swing arm 14, limiting cover 4 is provided on the side corresponding to ratchet 18, limiting tooth 9 is provided in limiting cover 4, one end of second swing arm 14 can be clamped into limiting tooth 9.

[0017] Further, vehicle condition balance inductor is arranged inside the vehicle body. The driving condition of the vehicle can be directly detected, such as the vibration fluctuation of the vehicle, whether the vehicle is tilted or not. Of course, according to the production needs, the vehicle condition balance inductor can be directly built into the inside of the retractor.

[0018] Further, shell frame 1 is provided with spherical cover 8 on the outside corresponding to electromagnetic coil 7, and the inner wall of spherical cover 8 is provided with a magnetic yoke. The electromagnetic coil 7 can be protected, and the magnetic yoke can amplify the magnetic field generated by the electromagnetic coil 7, thereby improving the attraction or repulsion effect of the magnetic block 6, and ensuring that the first swing arm 5 can swing in place.

[0019] The working principle of the utility model is: when the vehicle is braked suddenly, the second swing arm 14 will swing under the action of inertia and make its one end clamped into the limiting tooth 9 in the limiting cover 4, further limit the rotation of the ratchet 18, at this moment the human body will pull the safety belt out quickly under the action of inertia and drive the mandrel 3 to rotate, with the rotation of the mandrel 3 will drive the locking block 20 to act, and the locking block 20 will move outward under the guidance of the transmission pin 15 and the transmission groove 16, make the locking block 20 clamped into the clamping tooth 21, further realize the locking of the mandrel 3, limit the pulling out of the safety belt. At the same time, in the process of vehicle driving, the vehicle condition sensor will feed back the vibration and bumping situation of the vehicle and whether the vehicle is rolled or not to the controller, the controller will control the current direction of the electromagnetic coil 7 according to the feedback information, if the vehicle is in the driving situation of more bumping or rolled or not, the magnetic field generated by the electromagnetic coil 7 will repel the magnetic block 6 to make the first swing arm 5 swing and the pawl 11 clamp the ratchet 10, limit the rotation of the ratchet 18, further ensure that the mandrel 3 can be limited to rotate under the action of the locking assembly when the human body inertia moves to pull the safety belt out quickly, ensure that the safety belt will not be pulled out too much, ensure the safety of the personnel; when the vehicle is driven stably and is in the normal driving situation without rolling or not, the magnetic field generated by the electromagnetic coil 7 will attract the magnetic block 6 to make the first swing arm swing reversely, and the pawl 11 is separated from the ratchet 10, avoid the false locking of the safety belt.

Claims

1. A directional pull-out seat belt retractor, comprising a housing frame (1), a spindle (3) rotatably mounted on the housing frame (1), one end of the spindle (3) being connected to a coil spring assembly (2), a ratchet (18) being provided at the other end of the spindle (3), and a locking assembly being provided between the ratchet (18) and the spindle (3), characterized in that: The end of one side of the ratchet wheel (18) is provided with a ratchet (10) around, the first swing arm (5) is movably arranged on the shell frame (1), one end of the first swing arm (5) is provided with a pawl (11), the pawl (11) can be locked with the ratchet (10), the other end of the first swing arm (5) is provided with a magnetic block (6), the shell frame (1) is provided with an electromagnetic coil (7) near the magnetic block (6), further comprising a vehicle condition balance inductor, the vehicle condition balance inductor can feed back information to the controller, the controller can control the electromagnetic coil (7) to attract or repel the magnetic block (6) and then drive the first swing arm (5) to swing.

2. A directional pull-out seat belt retractor according to claim 1, characterized in that: The other end of the mandrel (3) is integrally provided with a rotating part (19), the locking assembly comprises a locking block (20) movably arranged in the rotating part (19), a elastic hook (22) is arranged between the locking block (20) and the rotating part (19), a transmission pin (15) is arranged on the locking block (20), the transmission pin (15) is clamped into the transmission groove (16) on the ratchet wheel (18), the shell frame (1) is provided with a clamping tooth (21) for clamping the locking block (20), the ratchet wheel (18) is provided with a second swing arm (14), one end of the second swing arm (14) is tightly pressed by a first spring (17), the ratchet wheel (18) is provided with a first positioning block (12) and a second positioning block (13) corresponding to the other end of the second swing arm (14), a limiting cover (4) is arranged corresponding to one side of the ratchet wheel (18), the limiting cover (4) is provided with a limiting tooth (9) inside, one end of the second swing arm (14) can be clamped into the limiting tooth (9).

3. A directional pull-out seat belt retractor according to claim 1, characterized in that: The vehicle condition balance inductor is arranged inside the vehicle body.

4. The directional pull-out lap belt retractor of claim 1, wherein: The shell frame (1) is provided with a spherical cover (8) outside corresponding to the electromagnetic coil (7), the inner wall of the spherical cover (8) is provided with a magnetic yoke.

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