Split type safety belt retractor for automobile rear seat

Technical field of split seat belt retractor for car rear seats

[0001] The present invention relates to the technical field of vehicle seat belt retractors, and in particular to a split seat belt retractor used for rear seats of automobiles.

Background technique

[0002] Vehicle seat belts are an important part of the vehicle occupant restraint system, especially in traffic accidents can provide protection for the vehicle occupants, to avoid injury to the occupants or to minimize injuries. With the continuous increase in the number of vehicles, vehicle users have higher and higher requirements for the safety performance of vehicle seat belts.

[0003] A retractor is provided in the seat belt system, and the function of the retractor is to store the webbing and lock the webbing. The retractor is usually equipped with a locking mechanism. The locking mechanism allows the safety webbing to be pulled out or rolled back freely when the vehicle is not driving or normal driving; when the vehicle is rapidly decelerating, tilting, or overturning, the car sensor component is activated and works The locking mechanism makes the locking mechanism emergency lock the reel of the retractor to prevent the webbing from being pulled out.

[0004] In the prior art, the car-sensing component and the retractor body are arranged in an integrated manner. For example, a Chinese patent (publication number CN111674354A) discloses a car-sensing component and a retractor, wherein the car-sensing component includes: Car-sensing support, car-sensing ball and car-sensing arm; car-sensing support is arranged on the mounting base plate of the retractor body. The car-sensing arm includes a clamping end, a connecting part and a cover-mounted end. The cover-mounted end is buckled on the car-sensing The opening of the support is to confine the car-sensing ball in the car-sensing support. The connecting part is movably connected to the edge of the opening of the car-sensing support, and the clamping end is set close to the ratchet wheel; when the car-sensing ball moves away from the mounting substrate At this time, through the connecting part, the clamping end moves to the direction of the mounting substrate and clamps the clamping teeth of the ratchet.

[0005] In the technical solution of the above-mentioned patent, the car-sensing component is integrated in the retractor body, that is, the car-sensing component and the retractor body are arranged in an integrated structure, which simplifies the overall structure of the retractor. As for the middle rear seat of the car, because the middle rear seat is far from the C-pillar, when the seat belt retractor is arranged, it is generally considered to be arranged on the back of the seat. However, the seat back of the rear seat generally needs to be turned over due to the use of the car by the occupants. When the turning speed of the seat back is too fast or the turning angle is too large, the car feel component is easily activated to act on the locking mechanism of the retractor. The safety webbing is locked so that the webbing cannot be pulled out from the retractor. In this way, due to the limitation of the webbing on the seat back, the turning range of the seat back will be greatly affected or even unable to turn, which directly affects the use of the rear space of the car by the drivers and passengers.

[0006] Therefore, it is necessary to design a new type of seat belt retractor, this new type of seat belt retractor can not only achieve the seat back in a large range of turnover, but also does not affect the seat belt retractor normal car feel and safety The webbing protects the occupants.

Summary of the invention

[0007] In view of this, the present invention provides a split seat belt retractor for the rear seat of an automobile, which can realize the seat back in a large range and does not affect the normal operation of the seat belt retractor. Car feeling function and safety webbing protect the occupants.

[0008] In order to achieve the above object, the present invention provides a split seat belt retractor for the rear seat of a car, comprising a retractor body and a car feel component, and the retractor body and the car feel component are separated The structure of the set; wherein, the retractor body is provided with a locking mechanism for locking the webbing when the webbing is quickly drawn out, and the locking mechanism is connected with the car-sensing component by a linkage device, and the linkage device is used for When the car feel component is activated, the locking mechanism is driven to lock

Webbing

[0009] The locking mechanism includes:

[0010] The locking ratchet is arranged on the side of the mounting base plate of the retractor body;

[0011] The lock cover is fixedly connected to the side of the mounting substrate of the retractor body. A partition is arranged inside the lock cover to separate the lock cover into a first cavity and a second cavity, wherein the first cavity covers the Lock the ratchet;

[0012] The sealing plate is used to encapsulate the second cavity of the lock cover;

[0013] The driving gear, located in the second cavity of the lock cover, is fixedly sleeved on the shaft end of the reel and rotates with the reel;

[0014] The driven gear assembly, which is located in the second cavity of the lock cover, includes a driven gear, a spool and a claw drive plate arranged coaxially in sequence, wherein the driven gear meshes with the driving gear, The winding reel is used to connect with the linkage device. The driven gear, the winding reel and the jaw drive plate are rotatably supported on the partition and the sealing plate through a driven gear shaft fixed to them In between, the partition plate and the sealing plate are respectively provided with arc-shaped grooves at the corresponding positions of the driven gear shaft, and both ends of the driven gear shaft are inserted into the partition plate through the arc-shaped grooves. And the sealing plate, and both ends of the driven gear shaft are also provided with first elastic elements to enable the driven gear shaft to have a tendency to remain in the extreme position on the arc-shaped groove; and

[0015] The pawl is located in the second cavity of the lock cover and is rotatably installed on the partition of the lock cover through a pawl shaft, and the action end of the pawl abuts against the driven gear assembly On the inner side of the claw drive disc, the clamping end of the claw passes through the through hole of the partition and is arranged close to the locking ratchet, and is used to cooperate with the locking ratchet to lock the reel. The pawl is provided with a second elastic element for keeping the clamping end of the pawl outward, so that the pawl does not contact the locking ratchet under normal conditions.

[0016] Preferably, the first elastic member is a torsion spring or an annular spring, the driven gear shaft is provided with the torsion spring at one end facing the sealing plate, and the driven gear shaft faces the partition plate. One end is provided with the toroidal spring.

[0017] Preferably, the linkage device includes:

[0018] The housing is provided with a first mounting cavity;

[0019] The wire wheel assembly is arranged in the first installation cavity of the housing, the wire wheel assembly includes a car-feeling ratchet wheel and a wire wheel that are snapped together, and the car-feeling ratchet wheel and the wire wheel are rotatably arranged in the first through a spool shaft. In an installation cavity, wherein the car feel ratchet is used to cooperate with the car feel component, and the wire wheel and the wire wheel shaft are connected by a coil spring so that the wire wheel can be rewinded; and

[0020] The cable, one end of the cable is fixedly connected and wound on the wire wheel, and the other end of the cable is fixedly connected through the through hole of the housing and wound on the winding of the driven gear assembly of the locking mechanism On the wire reel.

[0021] Preferably, the wire wheel includes a disk-shaped portion, and a side of the disk-shaped portion facing the car ratchet is provided with a cylindrical portion for winding the cable.

[0022] Preferably, a plurality of insert blocks are circumferentially provided on the circumference of one end of the cylindrical portion used to cooperate with the car-sensing ratchet; the car-sensing ratchet is provided with a plurality of corresponding sockets, the insert Insert into the socket, so that the wire wheel and the car feel ratchet wheel are snapped together as a whole.

[0023] Preferably, the number of the insert block and the socket is three.

[0024] Preferably, the housing is further provided with a second mounting cavity, the car sensing component is arranged in the second mounting cavity, and the second mounting cavity is in communication with the first mounting cavity, so that the car The vehicle sensor arm of the sensor assembly can extend into the first installation cavity to cooperate with the vehicle sensor ratchet.

[0025] Preferably, the retractor body is installed on the seat back of the vehicle seat, and the vehicle feel component is installed in the vehicle without turning over.

Turn on the site.

[0026] Preferably, the vehicle feel component is installed on the seat cushion of the vehicle seat.

[0027] The present invention has the following beneficial effects:

[0028] The split seat belt retractor for the rear seat of the car provided by the present invention separates the car feel component from the original retractor body, and the car feel component and the lock on the retractor body The locking mechanism is linked by the linkage device. The linkage device is used to transfer the locking function of the car sensor assembly to the locking mechanism of the retractor body, that is, in an emergency state, the car sensor assembly is activated by the linkage device to act on the locking mechanism to drive The locking mechanism locks the safety webbing. That is to say, the split seat belt retractor provided by the present invention has a normal feeling of the car and the safety webbing protects the occupants.

[0029] During installation, the retractor body is installed on the back of the seat, and the car-sensing component is installed in the car, such as the seat cushion and other parts that will not turn over. In this way, the car-sensing component will not be affected by the seat. The back adjustment angle is activated, and the chair back can be adjusted to any angle.

[0030] In summary, the split seat belt retractor for the rear seat of the car provided by the present invention can achieve the seat back in a large range, and does not affect the normal seat belt retractor. Sense function and safety webbing protect the occupants.

Description of the drawings

[0031] The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the drawings: [0032] FIG. 1 is an external view of the split seat belt retractor used in the rear seat of an automobile according to the present invention;

[0033] FIG. 2 is a schematic diagram of the structure of a car seat;

[0034] FIG. 3 is a schematic diagram of the internal structure of the locking mechanism;

[0035] FIG. 4 is an exploded schematic view of the lock cover and the sealing plate of the locking mechanism;

[0036] FIG. 5 is a schematic diagram of the driving gear and the driven gear meshing of the locking mechanism;

[0037] FIG. 6 is another schematic diagram of FIG. 5;

[0038] FIG. 7 is a schematic structural view of the claws of the locking mechanism;

[0039] FIG. 8 is a schematic diagram of the internal structure of the linkage device;

[0040] FIG. 9 is a schematic diagram of the structure of the housing of the linkage device;

[0041] FIG. 10 is a schematic diagram of the cooperation between the car-sensing ratchet and the car-sensing component of the linkage device;

[0042] FIG. 11 is an exploded schematic diagram of the reel and the car feel ratchet of the reel assembly of the linkage device;

[0043] FIG. 12 is a schematic diagram of the internal structure of the split seat belt retractor used in the rear seat of the car according to the present invention.

[0044] Attached icon number

[0045] 1- Retractor body

[0046] 11-Reel; 12-Mounting base plate; 13-Locking device;

13a-reel ratchet wheel; 13b-lock cover; 13c one plate; 13d-drive gear; 13e-driven gear assembly; 13 claws; 13g-arc groove; 13h-claw shaft; 13i-first Elastic element; 13j second elastic element;

[0048] 13b1- partition; 13b2- first cavity; 13b3- second cavity;

[0049] 13e1-driven gear; 13e2- spool; 13e3- jaw drive disk; 13e4- driven gear shaft;

[0050] 13f1-acting end; 13f2-clamping end;

[0051] 2-Car feel component;

[0052] 2a-car feeling seat; 2b-car feeling ball; 2c-car feeling arm;

[0053] 3-Linkage device;

[0054] 3a- housing; 3b- wire wheel; 3c- cable; 3d- car sense ratchet; 3e- coil spring;

[0055] 3a1-first mounting cavity; 3a2-spool shaft; 3a3-second mounting cavity

[0056] 3b1-disk-shaped part; 3b2-tubular part; 3b3-plug;

[0057] 3d1-Jack.

Detailed ways

[0058] In order to make the technical solutions and advantages of the embodiments of the present application clearer, the following describes the examples of the present application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and Not all examples are exhaustive. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict.

[0059] In this embodiment, the orientation or positional relationship indicated by the terms "upper", "lower", etc., are based on the orientation or positional relationship shown in the drawings, and are only for ease of description, rather than indicating or implying the device referred to. Or the element must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0060] FIG. 1 is an external view of a split seat belt retractor used in the rear seat of an automobile according to the present invention;

[0061] The present invention discloses a split seat belt retractor for the rear seat of a car, comprising a retractor body 1 and a car feel component 2. The retractor body 1 and the car feel component 2 are separated The structure is arranged to separate the car feel assembly 2 from the original retractor body 1. Wherein, the side of the mounting base plate 12 of the retractor body 1 is provided with a locking mechanism 13 for locking the webbing when the webbing is quickly drawn out, and the locking mechanism 13 is connected with the car sensor assembly 2 through a linkage device 3. The linkage device 3 is used to transfer the locking function of the car sensor assembly 2 to the locking mechanism 13. Specifically, when the vehicle has an accident, the car sensor assembly 2 is activated and acts on the locking mechanism 13 through the linkage device 3 to drive The locking mechanism 13 locks the safety webbing. That is to say, the split seat belt retractor provided by the present invention has a normal feeling of the car and the safety webbing protects the occupants.

[0062] Figure 2 shows a schematic diagram of the structure of the car seat. When installed, the retractor body 1 is installed on the back of the rear seat, and the car feel component 2 is installed on the seat cushion. In this way, the car feel The component 2 will not be activated by the influence of the adjustment angle of the chair back, and the chair back can be turned at any angle. It should be noted that the installation location of the car feel component 2 is not limited to the seat cushion of the car seat, and the car feel component 2 can also be installed in other parts in the car that cannot be turned over.

[0063] In summary, the split-structure seat belt retractor provided by the present invention can achieve the seat back in a wide range of flipping, and does not affect the normal feeling of the seat belt retractor and the safety webbing to the occupants protection of.

[0064] Please refer to Figures 3 to 7, Figure 3 is a schematic diagram of the internal structure of the locking mechanism; Figure 4 is an exploded schematic view of the locking cover and the sealing plate of the locking mechanism; Figure 5 is the driving gear and the driven gear of the locking mechanism A schematic diagram of gear meshing; FIG. 6 is another schematic diagram of FIG. 5; FIG. 7 is a schematic structural diagram of the claws of the locking mechanism.

[0065] FIG. 3 shows the internal structure of the locking mechanism 13. The locking mechanism 13 is arranged on the side of the mounting base plate 12 of the retractor body, and is used to lock the drawing action of the webbing when the webbing is quickly drawn out. Specifically, the locking mechanism 13 includes:

[0066] The locking ratchet 13a is arranged on the side of the mounting base 12 of the retractor body;

[0067] The lock cover 13b is fixedly connected to the side of the mounting base plate 12 of the retractor body. A partition 13b1 is arranged inside the lock cover 13b to separate the lock cover 13b into a first cavity 13b2 (see FIG. 4) and a second cavity 13b2 (see FIG. 4). The cavity 13b3 (see Figure 4), wherein the first cavity 13b2 covers the locking ratchet 13a;

[0068] The sealing plate 13c (see FIG. 4) is used to encapsulate the second cavity 13b3 of the lock cover 13b;

[0069] The driving gear 13d is located in the second cavity 13b3 of the lock cover 13b, and is fixedly sleeved on the shaft end of the reel 11 and

Rotate with the reel 11;

[0070] The driven gear assembly 13e, which is located in the second cavity 13b3 of the lock cover 13b, includes a driven gear 13e1, a winding reel 13e2, and a claw drive plate 13e3 arranged coaxially in sequence, wherein the driven gear 13e1 ( See Figure 5) meshing with the driving gear 13d, the reel 13e2 is used to connect with the linkage 3, the driven gear 13e1, the reel 13e2 and the claw drive plate 13e3 pass through the driven gear fixedly connected to them The shaft 13e4 is rotatably supported between the partition 13b1 and the sealing plate 13c of the lock cover. The partition 13b1 and the sealing plate 13c are respectively provided with arc-shaped grooves 13g at the corresponding positions of the driven gear shaft 13e4 (see Figure 4), Both ends of the driven gear shaft 13e4 are inserted into the partition 13b1 and the sealing plate 13c through the arc-shaped grooves, and the both ends of the driven gear shaft 13e4 are also provided with first elastic elements 13i to enable the driven gear shaft 13e4 to have The tendency to remain at the extreme position of the arc groove 13g; and

[0071] The pawl 13f is located in the second cavity 13b3 of the lock cover 13b, and is rotatably mounted on the partition 13b1 of the lock cover through the pawl shaft 13h, and the action end 13f1 of the pawl 13f (see Figure 7) Abut the inner side of the claw drive plate 13e3 of the driven gear assembly 13e (the inner side of the claw drive plate refers to the side of the claw drive plate 13e3 facing the claw shaft 13h), and the clamping end of the claw (see Figure 7) penetrates Pass through the through hole of the partition 13b1 and close to the locking ratchet 13a to cooperate with the locking ratchet 13a to lock the reel. The pawl 13f is provided with a second elastic element 13j to make the pawl 13h lock The terminal 13f2 maintains a tendency to bounce outward (the pawl outward refers to the direction away from the locking ratchet in the radial direction of the locking ratchet), so that the pawl does not contact the locking ratchet under normal conditions.

[0072] Under normal conditions, the rotation of the reel 11 drives the driving gear 13d to rotate, and the rotation of the driving gear 13d drives the driven gear assembly 13e to rotate as a whole. At this time, the first elastic element 13i applies an oblique upward elastic force F1 to the driven gear shaft 13e4 to make The driven gear assembly 13e is entirely maintained at the upper limit position of the arc groove 13g. That is to say, under normal conditions, the driven gear assembly as a whole is kept rotating at the upper limit position of the arc-shaped groove 13g. The connecting end 13f2 bounces outwards, that is, the clamping end 13f2 of the pawl 13f does not contact the locking ratchet 13a, the reel 11 will not be locked and can rotate normally, and the seat belt webbing can be normally pulled out and rewinded.

[0073] In an emergency situation (a collision accident), the car sensor assembly 2 is activated and acts on the winding reel 13e2 of the driven gear assembly through the linkage device 3 to make the winding reel 13e3 stuck and not rotating, then the driven gear 13e1 is stuck Do not rotate, at this time, the driving gear 13d continues to rotate, exerting an oblique downward force F2 (see Figures 5 and 6) on the driven gear 13e1, forcing the force F2 to overcome the elastic force F1 of the first elastic member 13i. The driven gear assembly 13e swings downward along the arc-shaped groove 13g as a whole. The driven gear assembly 13e swings downward in an arc as a whole, and the claw drive plate 13e3 acts on the action end 13f1 of the claw 13f and presses down the action end 13f1 of the claw 13f. Due to the lever effect, the claw 13f The clamping end 13f2 rotates inward until it contacts and cooperates with the locking ratchet 13a to lock the reel 11. At this time, the reel 11 is locked and the seat belt webbing cannot be pulled out continuously, which can protect the occupant.

[0074] It can be seen from the above technical solution that the present invention optimizes the structure of the locking structure 13. The driven gear assembly 13e is used to drive the pawl 13f to lock the reel by means of circular arc swinging, and the locking mechanism 13 is stable in transmission and has a good feel. High sensitivity, compact overall structure, convenient for the overall arrangement of the retractor.

[0075] In order to further optimize the technical solution, in order to ensure the overall stability of the driven gear assembly 13e in the present invention, the first elastic element 13i is a torsion spring or an annular spring, and the driven gear shaft 13e4 is provided with a torsion spring at one end facing the sealing plate 13c, The driven gear shaft 13e4 is provided with a ring spring toward one end of the partition 13bi. That is, in the present invention, a torsion spring and an annular spring are respectively provided at both ends of the driven gear shaft 13e4 to simultaneously apply an oblique upward elastic force to both ends of the driven gear shaft 13e4, thereby making the driven gear assembly 13e as a whole Maintain the limit position on the arc groove 13g steadily.

[0076] Please refer to Figures 8 to 11, Figure 8 is a schematic diagram of the internal structure of the linkage device; Figure 9 is the structure of the housing of the linkage device

Schematic diagram of the structure; Figure 10 is a schematic diagram of the coordination of the car-sensing ratchet of the linkage device and the car-sensing component; Figure 11 is an exploded schematic diagram of the reel and the car-sensing ratchet of the reel assembly of the linkage device.

[0077] The linkage device 3 is used to transfer the locking function of the car feel assembly 2 to the locking mechanism 13 of the retractor body. The linkage device 3 includes:

[0078] The housing 3a is provided with a first mounting cavity 3a1;

[0079] The wire wheel assembly arranged in the first installation cavity 3a1 of the housing, the wire wheel assembly includes a car-feeling ratchet wheel 3d and a wire wheel 3b that are snapped together, and the car-feeling ratchet wheel 3d and the wire wheel 3b pass through a wire wheel shaft 3a2 It is rotatably arranged in the first installation cavity 3a1, wherein the car feel ratchet 3d is used to cooperate with the car feel component 2, and the wire wheel 3b is connected with the wire wheel shaft 3a2 through a coil spring 3e so that the wire wheel 3b can be rolled back; as well as

[0080] The cable 3c, one end of the cable 3c is fixedly connected and wound on the spool 3b, and the other end of the cable 3c is fixedly connected through the through hole of the housing 3a and wound on the driven gear assembly 13e of the locking mechanism 13 On the reel 13e2.

[0081] The wire wheel 3b includes a disc-shaped portion 3b1, and the disc-shaped portion 3b1 is provided with a cylindrical portion 3b2 for winding the cable on the side of the disc-shaped portion 3b1 facing the car ratchet 3d. The cylindrical part 3b2 is provided with three inserts on the periphery of one end that is used to match the car feel ratchet. The car feel ratchet 3d is provided with three corresponding sockets 3d1. The insert 3b3 is inserted into the socket 3d1 to make the wire wheel 3b and the car-feeling ratchet wheel 3d are snap-connected into one body.

[0082] FIG. 12 shows a schematic diagram of the internal structure of the split seat belt retractor used in the rear seat of the car of the present invention.

[0083] Please refer to FIGS. 3 and 12, under normal conditions, the rotation of the reel 11 drives the driving gear 13d to rotate, and the driving gear 13d drives the driven gear assembly 13e to rotate as a whole at the upper limit position of the arc groove 13g of the lock cover. Under the action of the elastic force of the two elastic members 13j, the clamping end 13f2 of the pawl 13f is lifted outwards, so that the clamping end 13f2 of the pawl does not contact the locking ratchet 13a, and the reel 11 will not be locked and can rotate normally. The seat belt webbing can be pulled out and rolled back normally.

[0084] In an emergency (a collision accident), the car sensor assembly 2 is activated, and the car sensor arm 23 of the car sensor assembly 2 and the car sensor ratchet 3d of the linkage device 3 cooperate to lock the car sensor ratchet 3d without rotating, then the line The wheel 3b is stuck and does not rotate at the same time. At this time, the cable 3c is in a taut state, and normal winding and winding cannot be realized, so that the winding reel 13e2 of the driven gear assembly is tightened, so that the winding reel 13e2 is stuck and does not rotate. At this time, driven by the reel 11, the driving gear 13d continues to rotate in the W direction shown in FIG. 12, exerting an oblique downward force F2 on the driven gear 13e1, forcing the force F2 to overcome the elastic force of the first elastic member 13i F1 forces the driven gear assembly 13e to swing downward along the arc-shaped groove 13g as a whole. The driven gear assembly 13e swings downward in an arc as a whole. The clamping end 13f2 of the driving pawl rotates inward to contact with the locking ratchet 13a to lock the reel 11. At this time, the seat belt webbing cannot be pulled out continuously, realizing the safety to the occupant. protect.

[0085] It should be noted that the structure of the car feel assembly 2 and its locking principle with the car feel ratchet 3d are similar to those in the prior art, that is, the car feel assembly includes a car feel seat 2a, The car sensor ball 2b and the car sensor arm 2c, the car sensor component is used to sense the state of the vehicle. When the vehicle is in an accident, the car sensor component is activated, and the car sensor arm 2c acts on the car sensor ratchet 3d to lock the car sensor ratchet 3d.

[0086] Preferably, in order to facilitate the arrangement and installation of the linkage device 3 and the car sensor assembly 2 in the present invention, the car sensor assembly 2 and the wire wheel assembly of the linkage device 3 are integrated into one body. Specifically, the housing 3a of the linkage device 3 is further provided with a second installation cavity 3a3, the car sensor assembly 2 is arranged in the second installation cavity 3a3, and the second installation cavity 3a3 communicates with the first installation cavity 3a1 to The car-sensing arm 23 of the car-sensing component can extend into the first installation cavity 3a2 to cooperate with the car-sensing ratchet 3d.

[0087] Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.