Active automobile headrest buffer device with pre-crash tensioning function

Abstract

The present application relates to the technical field of automobile headrest, in particular to an active automobile headrest buffer device with pre-tightening function before collision, comprising a seat body, a buffer device, a first sliding rail, a sliding block, a connecting frame, an arc block and a baffle, in the present application, when the vehicle collides, the impact load in any direction will cause the passenger's body displacement, and then pull the horizontal safety belt; the horizontal safety belt is driven to slide along the first sliding rail after being pulled, synchronously driving the headrest to produce corresponding displacement, realizing effective protection of the passenger's head, and in the process of sliding of the connecting frame, the upper end of the connecting frame pushes the arc block and the connecting plate to move upward, so that the center soft point of the headrest is maintained at the protection reference position which is flush with the upper edge of the driver's ear. When the side wall of the connecting frame abuts against the baffle, the continuously transmitted force acts on the connecting plate, driving the headrest to produce an inclined action, so that the headrest further approaches the human head, ensuring that the headrest buffer device can fully play the protection efficiency under the collision condition.

Description

Technical Field

[0001] This invention relates to the field of automotive headrest technology, specifically an active automotive headrest cushioning device with pre-collision pre-tensioning function. Background Technology

[0002] Car headrest cushioning devices are key safety components of vehicle seats. They mainly absorb impact energy during a collision, reducing the risk of whiplash injury to the occupant's cervical spine. They also provide comfort by alleviating driver fatigue. Mainstream headrests use materials such as memory foam and high-elasticity foam as support, utilizing the deformation of the materials to absorb impact energy. Some designs adopt a U-shaped ergonomic structure to ensure that the head fits tightly against the headrest in the moment of a rear-end collision, reducing the degree of neck backward tilting.

[0003] Traditional mechanical headrests rely on the driver's body pressing against the backrest pressure plate to be triggered. If the rear-end collision comes from the side or rear, or if the driver's body is not pressed against the backrest at the time, the backward displacement generated by the body may not be enough to trigger the mechanism, causing the headrest to fail to pop out and thus failing to protect the human head. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method that utilizes the stretching of the seatbelt to move the headrest, thereby preventing the headrest from failing to pop out.

[0005] To address the problems in the prior art, this invention provides an active automotive headrest buffer device with pre-collision pretensioning function, comprising a seat body, a buffer device inside the seat body, the buffer device including a first slide rail, a slider, a connecting frame, an arc-shaped block, a baffle, and a connecting plate. The first slide rail is fixedly installed inside the backrest, the slider is slidably connected inside the first slide rail, the lower end of the connecting frame is fixedly connected to the upper end of the slider, the upper end of the connecting frame is arc-shaped, one end of the transverse seat belt is fixedly connected to the side wall of the connecting frame, the lower end of the arc-shaped block is arc-shaped, the arc-shaped block is fixedly installed at the lower end of the connecting plate, and the baffle is fixedly connected to the arc-shaped end of the arc-shaped block.

[0006] Specifically, the upper end of the connecting plate is fixedly connected to the lower end of the headrest, and a set of sliding grooves are respectively opened in the two side walls of the connecting plate.

[0007] Specifically, a set of connecting blocks are slidably connected inside the slide groove. The side wall of the connecting block is fixedly connected to the telescopic end of the spring sleeve plate. The spring sleeve plate is composed of a spring block and a base. The base of the spring sleeve plate is fixedly connected to the upper end of the backrest.

[0008] Specifically, a spring sleeve rod is installed on the side wall of the connecting frame. The spring sleeve rod consists of a spring rod and a cylinder. The spring rod is slidably connected inside the cylinder, and one end of the spring rod is fixedly connected to the inner wall of the backrest.

[0009] Specifically, the seat body is provided with a locking structure, which consists of a transverse safety belt, a longitudinal safety belt, a mounting box, a mounting shaft, a drum, a multi-head electric push rod, a limiting groove, a second slide rail, and a slot. One end of one set of transverse safety belts is fixedly connected to the side wall of the connecting frame, and the other end of the transverse safety belts is fixedly connected to the side wall of the mounting box. Another set of transverse safety belts is wrapped around the outer wall of the drum.

[0010] Specifically, the drum is rotatably connected to the outer wall of the mounting shaft, and multiple sets of limiting grooves are formed inside the drum.

[0011] Specifically, the mounting shaft is fixedly installed inside the mounting box, the multi-head electric actuator is fixedly installed between the two sets of mounting shafts, and the output shaft of the multi-head electric actuator has the same thickness as the limiting groove size.

[0012] Specifically, the mounting box is slidably connected to a set of second slide rails, which are fixedly installed on the side wall of the backrest, and the slots are opened on both sides of the backrest.

[0013] Specifically, one end of the longitudinal seat belt is fixedly connected to the side wall of the transverse seat belt, and the other end of the longitudinal seat belt is connected to the seat belt retraction device inside the vehicle body.

[0014] Specifically, the seat body is connected to the backrest via a transmission device.

[0015] The beneficial effects of this invention are: 1. In this invention, when a vehicle collides, the impact load in any direction will cause the occupant's body to shift, thereby pulling the lateral seat belt; after the lateral seat belt is pulled, it drives the connecting frame to slide along the inside of the first slide rail, and simultaneously drives the headrest to produce a corresponding displacement, thereby achieving effective protection for the occupant's head.

[0016] 2. In this invention, during the sliding process of the connecting frame, its upper end pushes the arc-shaped block and the connecting plate upwards, keeping the soft point of the headrest at the protective reference position flush with the upper edge of the driver's ear. When the side wall of the connecting frame abuts against the baffle, the continuously transmitted force acts on the connecting plate, driving the headrest to tilt, making the headrest closer to the human head, ensuring that the headrest buffer device can fully exert its protective effect under collision conditions.

[0017] 3. In this invention, after the vehicle is started, the multi-head electric push rod can drive the sliding end to extend into the limiting groove to limit the drum, thereby locking the lateral seat belt; it can prevent the lateral seat belt from being pulled out excessively when a collision occurs and the human body is impacted and leans forward, thus avoiding the failure of protection due to excessive extension of the seat belt. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall connection structure of the present invention; Figure 2 This is a side sectional view of the present invention; Figure 3 This is a schematic diagram of the internal locking structure of the present invention; Figure 4 In this invention Figure 3 A schematic diagram of the internal component connection structure; Figure 5 In this invention Figure 3 Side sectional view; Figure 6 In this invention Figure 2 Enlarged view of point A; Figure 7 In this invention Figure 2 Enlarged view of point B; Figure 8 In this invention Figure 2 Enlarged view of point C.

[0020] In the diagram: 1. Seat body; 110. Backrest; 111. Headrest; 2. Buffer device; 210. First slide rail; 211. Slider; 212. Connecting frame; 213. Spring sleeve rod; 214. Arc block; 215. Baffle; 216. Connecting plate; 217. Slide groove; 218. Connecting block; 219. Spring sleeve plate; 3. Locking structure; 310. Transverse safety belt; 311. Longitudinal safety belt; 312. Mounting box; 313. Mounting shaft; 314. Drum; 315. Multi-head electric actuator; 316. Limiting groove; 317. Second slide rail; 318. Groove. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example 1:

[0023] like Figures 1-8 An active car headrest cushioning device with pre-collision pretensioning function is shown, comprising a seat body 1, a cushioning device 2 provided inside the seat body 1, the cushioning device 2 including a first slide rail 210, a slider 211, a connecting frame 212, an arc-shaped block 214, a baffle 215 and a connecting plate 216. The first slide rail 210 is fixedly installed inside the backrest 110, the slider 211 is slidably connected inside the first slide rail 210, the lower end of the connecting frame 212 is fixedly connected to the upper end of the slider 211, the upper end of the connecting frame 212 is arc-shaped, one end of the transverse seat belt 310 is fixedly connected to the side wall of the connecting frame 212, the lower end of the arc-shaped block 214 is arc-shaped, the arc-shaped block 214 is fixedly installed at the lower end of the connecting plate 216, and the baffle 215 is fixedly connected to the arc-shaped end of the arc-shaped block 214.

[0024] As described above, if a vehicle collision occurs, the impact from any direction will cause the driver's body to shift, thereby pulling the lateral seat belt 310. When the lateral seat belt 310 is pulled by the tension, the mounting box 312 slides along the inside of the second slide rail 317, and at the same time, the traction connecting frame 212 slides along the first slide rail 210. When the connecting frame 212 slides, the upper end pushes the arc-shaped block 214 and the connecting plate 216 upward. During the upward movement of the connecting plate 216, the connecting block 218 slides synchronously along the inside of the slide groove 217 to prevent the extension end of the spring sleeve 219 from disengaging from the connecting plate 216, and simultaneously maintain the reference position of the center soft point of the headrest 111 being flush with the upper edge of the driver's ear.

[0025] Furthermore, the upper end of the connecting plate 216 is fixedly connected to the lower end of the headrest 111, and a set of sliding grooves 217 are respectively opened in the two side walls of the connecting plate 216.

[0026] As shown above, the connecting plate 216 provides an installation position for the headrest 111 and a stable installation environment for the slide 217.

[0027] Furthermore, a set of connecting blocks 218 are slidably connected inside the slide groove 217. The side wall of the connecting block 218 is fixedly connected to the telescopic end of the spring sleeve plate 219. The spring sleeve plate 219 is composed of a spring block and a base. The base of the spring sleeve plate 219 is fixedly connected to the upper end of the backrest 110.

[0028] As shown above, when the side wall of the connecting frame 212 abuts against the baffle 215, the impact force is continuously transmitted to the connecting plate 216, causing the connecting plate 216 to tilt and deflect. During the tilting process of the connecting plate 216, the telescopic end of one set of spring sleeves 219 is pushed back into the base, while the telescopic end of the other set of spring sleeves 219 extends outward. Relying on the differentiated telescopic cooperation of the two sets of spring sleeves 219, the tilting movement of the headrest 111 driven by the connecting plate 216 is ensured to be stable and controllable.

[0029] Furthermore, a spring sleeve rod 213 is installed on the side wall of the connecting frame 212. The spring sleeve rod 213 is composed of a spring rod and a cylinder. The spring rod is slidably connected inside the cylinder, and one end of the spring rod is fixedly connected to the inner wall of the backrest 110.

[0030] As shown above, the connecting frame 212 provides a stable installation environment for the spring sleeve 213, and the spring rod inside the spring sleeve 213 can slide with the connecting frame 212, thereby increasing the overall stability of the parts.

[0031] Example 2:

[0032] Example 2 is a further improvement on Example 1.

[0033] like Figures 1-7 As shown, the seat body 1 is provided with a locking structure 3. The locking structure 3 consists of a transverse safety belt 310, a longitudinal safety belt 311, a mounting box 312, a mounting shaft 313, a drum 314, a multi-head electric push rod 315, a limiting groove 316, a second slide rail 317, and a slot 318. One end of one set of transverse safety belts 310 is fixedly connected to the side wall of the connecting frame 212, and the other end of the transverse safety belts 310 is fixedly connected to the side wall of the mounting box 312. Another set of transverse safety belts 310 is wrapped around the outer wall of the drum 314.

[0034] As shown above, before starting the vehicle, the driver first fastens the lateral seat belt 310 around the waist, and then puts on the fixed longitudinal seat belt 311. At this time, the telescopic rod of the multi-head electric push rod 315 has not yet entered the limiting groove 316, and the reel 314 is not constrained. The driver can freely adjust the wearing length of the lateral seat belt 310 and the longitudinal seat belt 311 according to his own body shape. One end of the longitudinal seat belt 311 is connected to the built-in retraction device of the door. The locking component configured in the retraction device is consistent with the overall locking component specifications and structure of the locking structure 3. After fastening the seat belt, the vehicle can be started.

[0035] Furthermore, the drum 314 is rotatably connected to the outer wall of the mounting shaft 313, and multiple sets of limiting grooves 316 are provided inside the drum 314.

[0036] As shown above, the mounting shaft 313 provides a stable mounting environment for the drum, while the drum 314 provides a mounting environment for the limiting groove 316.

[0037] Furthermore, the mounting shaft 313 is fixedly installed inside the mounting box 312, the multi-head electric actuator 315 is fixedly installed between the two sets of mounting shafts 313, and the output shaft of the multi-head electric actuator 315 has the same thickness as the limiting groove 316. The mounting box 312 is slidably connected in a set of second slide rails 317, the second slide rails 317 are fixedly installed on the side wall of the backrest 110, the slots 318 are opened on both sides of the backrest 110, one end of the longitudinal seat belt 311 is fixedly connected to the side wall of the transverse seat belt 310, and the other end of the longitudinal seat belt 311 is connected to the seat belt retraction device inside the vehicle body.

[0038] As shown above, after the seat belt length adjustment is completed and the vehicle is started, the vehicle central control system immediately outputs a control signal to drive the multi-head electric actuator 315 to work. Each set of telescopic rods of the multi-head electric actuator 315 extends into the limiting groove 316 simultaneously to achieve mechanical limiting of the drum 314 and complete the locking of this section of the transverse seat belt 310. The other section of the transverse seat belt 310 still retains the prescribed travel distance, which can not only meet the driver's normal limb movement needs during driving, but also provide a buffer margin in the event of a vehicle collision.

[0039] Furthermore, the seat body 1 is connected to the backrest 110 via a transmission device.

[0040] As shown above, the driver can adjust the tilt of the backrest 110 via the transmission device to meet their needs.

[0041] Working principle: Before starting the vehicle, the driver first fastens the lateral seat belt 310 around their waist, and then puts on the fixed longitudinal seat belt 311. At this time, the telescopic rod of the multi-head electric actuator 315 has not yet entered the limiting groove 316, and the drum 314 is unrestrained. The driver can freely adjust the wearing length of the lateral seat belt 310 and the longitudinal seat belt 311 according to their own body shape. One end of the longitudinal seat belt 311 is connected to the built-in retraction device in the door. The locking component of the retraction device is consistent with the specifications and structure of the overall locking components of the locking structure 3. The seat belt length After adjustment, the vehicle is started. The vehicle's central control system then outputs a control signal to drive the multi-head electric actuator 315. Each set of telescopic rods of the multi-head electric actuator 315 simultaneously extends into the limiting groove 316, achieving mechanical limiting of the drum 314 and locking that section of the transverse seatbelt 310. Another section of the transverse seatbelt 310 retains its prescribed travel range, satisfying the driver's normal limb movement needs during driving while also providing a buffer margin in the event of a collision. In the event of a collision, impact from any direction will cause displacement of the driver's body, thus… When the transverse seat belt 310 is pulled, the mounting box 312 slides along the inside of the second slide rail 317, and at the same time, the traction connecting frame 212 slides along the first slide rail 210. When the connecting frame 212 slides, the upper end pushes the arc-shaped block 214 and the connecting plate 216 upward. During the upward movement of the connecting plate 216, the connecting block 218 slides synchronously along the inside of the slide groove 217 to prevent the telescopic end of the spring sleeve 219 from disengaging from the connecting plate 216, and simultaneously maintains the reference position of the center soft point of the headrest 111 being flush with the upper edge of the driver's ear. After the side wall of the connecting frame 212 abuts against the baffle 215, the impact force is continuously transmitted to the connecting plate 216, causing the connecting plate 216 to tilt and deflect. During the tilting process, the connecting plate 216 pushes the telescopic end of one set of spring sleeves 219 to retract into the base, while the telescopic end of the other set of spring sleeves 219 extends outward. Relying on the differentiated telescopic cooperation of the two sets of spring sleeves 219, the tilting movement of the headrest 111 driven by the connecting plate 216 is ensured to be stable and controllable, allowing the headrest to get closer to the human head and ensuring that the headrest buffer device fully plays its protective role under collision conditions.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention.

Claims

1. An active automotive headrest cushioning device with pre-collision pre-tensioning function, characterized in that, Including the seat body (1); The seat body (1) is provided with a buffer device (2), which includes a first slide rail (210), a slider (211), a connecting frame (212), an arc block (214), a baffle (215) and a connecting plate (216). The first slide rail (210) is fixedly installed inside the backrest (110); The slider (211) is slidably connected inside the first slide rail (210); The lower end of the connecting frame (212) is fixedly connected to the upper end of the slider (211), the upper end of the connecting frame (212) is arc-shaped, and the side wall of the connecting frame (212) is fixedly connected to one end of the transverse safety belt (310). The lower end of the arc-shaped block (214) is arc-shaped, and the arc-shaped block (214) is fixedly installed on the lower end of the connecting plate (216); The baffle (215) is fixedly connected to the arc-shaped end of the arc-shaped block (214).

2. The active automotive headrest cushioning device according to claim 1, characterized in that: The upper end of the connecting plate (216) is fixedly connected to the lower end of the headrest (111); A set of sliding grooves (217) are respectively provided in the two side walls of the connecting plate (216).

3. The active automotive headrest cushioning device according to claim 2, characterized in that: The groove (217) has a set of connecting blocks (218) inside it. The side wall of the connecting block (218) is fixedly connected to the telescopic end of the spring sleeve plate (219); The spring sleeve (219) consists of a spring block and a base, and the base of the spring sleeve (219) is fixedly connected to the upper end of the backrest (110).

4. The active automotive headrest cushioning device according to claim 1, characterized in that: A spring sleeve rod (213) is installed on the side wall of the connecting frame (212). The spring sleeve (213) consists of a spring rod and a cylinder. The spring rod is slidably connected inside the cylinder, and one end of the spring rod is fixedly connected to the inner wall of the backrest (110).

5. The active automotive headrest cushioning device according to claim 1, characterized in that: The seat body (1) is provided with a locking structure (3), which consists of a transverse safety belt (310), a longitudinal safety belt (311), a mounting box (312), a mounting shaft (313), a drum (314), a multi-head electric push rod (315), a limiting groove (316), a second slide rail (317), and a slot (318). One end of one set of the transverse safety belts (310) is fixedly connected to the side wall of the connecting frame (212), and the other end of the transverse safety belts (310) is fixedly connected to the side wall of the mounting box (312). Another set of transverse safety belts (310) is wrapped around the outer wall of the drum (314).

6. The active automotive headrest cushioning device according to claim 5, characterized in that: The drum (314) is rotatably connected to the outer wall of the mounting shaft (313); The inside of the drum (314) is provided with multiple sets of limiting grooves (316).

7. The active automotive headrest cushioning device according to claim 5, characterized in that: The mounting shaft (313) is fixedly installed inside the mounting box (312); The multi-head electric actuator (315) is fixedly installed between two sets of mounting shafts (313), and the output shaft of the multi-head electric actuator (315) has the same thickness as the limiting groove (316).

8. The active automotive headrest cushioning device according to claim 5, characterized in that: The mounting box (312) is slidably connected in a set of second slide rails (317), which are fixedly installed on the side wall of the backrest (110); The slots (318) are located on both sides of the backrest (110).

9. The active automotive headrest cushioning device according to claim 5, characterized in that: One end of the longitudinal seat belt (311) is fixedly connected to the side wall of the transverse seat belt (310), and the other end of the longitudinal seat belt (311) is connected to the seat belt retraction device inside the vehicle body.

10. The active automotive headrest cushioning device according to claim 1, characterized in that: The seat body (1) is connected to the backrest (110) via a transmission device.

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