Active protection headrest device

Abstract

The present invention provides an active protection headrest device, including a headrest, a piston connecting rod, and a controller. The headrest includes a movable headrest moving part and a headrest fixing part fixed on the car seat. A cylinder is arranged in the headrest fixing part. The inner wall of the cylinder is slidably connected with one end of the piston connecting rod. The other end of the piston connecting rod is fixed with the headrest moving part. The end of the cylinder away from the headrest moving part is connected with an inflatable device. The side wall of the cylinder is also connected with an air release pipe. An occupant head displacement sensor is arranged below the headrest fixing part. A pressure sensor is arranged at one end of the headrest moving part away from the headrest fixing part. A cylinder displacement sensor is arranged on the inner wall of the cylinder. The headrest device created by the present invention can be activated in time and protect the neck of the occupant in case of rear-end collision to avoid neck injury. The position of the headrest can be automatically adjusted according to different occupant states to meet the riding safety requirements of different users.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile safety, and in particular relates to an active protection headrest device. Background Art

[0002] Rear collision is the least likely type of accident to cause death, but it has the highest probability of causing injury. Once a rear collision occurs, due to inertia, the driver's head remains in its original position or moves slowly, while the driver's body moves forward with the vehicle, which will injure the driver's neck. Rear collision injury is the most serious secondary injury in traffic accidents, with many complications and a long incubation period. Not only will the injured suffer great pain, but it will also cause great property losses.

[0003] In the prior art, neck protection is mainly based on the seat system. The protection principle is to limit the backward movement of the head relative to the upper torso during a rear-end collision through the seat system's backrest and headrest, thereby reducing the risk of neck injury. Although there are already mechanical active headrests, the main principle is that during a collision, the occupant presses the seat backward due to inertia, and the headrest is activated through a spatial linkage mechanism. However, the response time of this technical solution varies due to different occupant conditions, that is, before the headrest takes effect, neck injury may have occurred, and the occupant's neck safety cannot be guaranteed. Therefore, it is very necessary to develop a device that can automatically adjust the position of the headrest according to different occupant conditions to meet the riding safety requirements of different users. Summary of the invention

[0004] In view of this, the present invention aims to propose an active protection headrest device, which can be activated in time to protect the occupant's neck in a rear-end collision to avoid neck injuries, and can automatically adjust the position of the headrest according to different occupant status to meet the riding safety requirements of different users.

[0005] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0006] An active protection headrest device comprises a headrest, a piston connecting rod and a controller. The headrest comprises a movable headrest moving part and a headrest fixing part fixed on a car seat. A cylinder is arranged in the headrest fixing part. The inner wall of the cylinder is slidably connected to one end of the piston connecting rod. The other end of the piston connecting rod is fixed to the headrest moving part. The inflatable device is electrically connected to the controller.

[0007] Furthermore, it also includes a sensor component, which includes an occupant head displacement sensor, a pressure sensor, and a cylinder displacement sensor, all of which are electrically connected to the controller.

[0008] Furthermore, the occupant head displacement sensor is arranged below the headrest fixing part, the pressure sensor is arranged at one end of the headrest moving part away from the headrest fixing part, and the cylinder displacement sensor is arranged on the inner wall of the cylinder.

[0009] Furthermore, the piston connecting rod includes a first rod, a second rod, and a third rod which are connected in sequence, the first rod is located in the headrest moving part, the third rod is located in the cylinder, and the third rod is slidably connected to the inner wall of the cylinder.

[0010] Furthermore, it also includes at least one spring, which is located between the first rod and the third rod, one end of the spring is connected to the inner wall of the cylinder, and the other end of the spring is connected to the third rod.

[0011] Furthermore, the cylinder displacement sensor is located between the first rod and the third rod.

[0012] Furthermore, it also includes a buffer block, which is located between the third rod and the inflation device, and the buffer block is fixed to the inner wall of the cylinder.

[0013] Furthermore, it also includes a headrest rod, one end of the headrest rod extends into the headrest fixing part, and the other end of the headrest rod extends out of the headrest fixing part, the occupant head displacement sensor is located on the headrest rod, and the occupant head displacement sensor is located between the headrest moving part and the headrest rod.

[0014] Furthermore, the headrest fixing portion is connected to the inflation device via an inflation tube, and an inflation valve is provided in the inflation tube.

[0015] Furthermore, two deflation pipes are provided, and the two deflation pipes are respectively located on both sides of the cylinder, and deflation valves are provided in the deflation pipes. The inflation valve and the deflation valve are both electrically connected to the controller.

[0016] Furthermore, the headrest includes an inner liner made of polyurethane foam and a surface cover wrapping the inner liner.

[0017] The face cover is made of fabric or leather material and is wrapped around the outer surface of the headrest to play a cushioning role.

[0018] Furthermore, the pressure sensor is located between the inner liner and the face cover.

[0019] Furthermore, the buffer block is made of elastic material.

[0020] Furthermore, the buffer block is preferably made of elastic rubber material.

[0021] Furthermore, the occupant head displacement sensor and cylinder displacement sensor are preferably OMEGA-LP804 micro position sensors.

[0022] Furthermore, the pressure sensor is preferably a MTO-L10C micro force sensor.

[0023] Furthermore, the controller is preferably a CQ57HB76-401A controller.

[0024] Furthermore, the cylinder is preferably a SMC-MXS12-40AS cylinder.

[0025] Compared with the prior art, the active protection headrest device created by the present invention has the following advantages:

[0026] (1) The headrest device of the present invention can be activated in time to protect the neck of the occupant in the event of a rear-end collision, thereby avoiding neck injuries. The headrest position can also be automatically adjusted according to different occupant states, thereby meeting the riding safety requirements of different users.

[0027] (2) The headrest device described in the present invention can automatically adjust the pressure relief time according to the pressure after the occupant's head contacts the moving part of the headrest, thereby preventing unnecessary injuries. It is highly flexible and suitable for protection in different situations.

[0028] (3) In the headrest device described in the present invention, a spring is arranged in the cylinder. When the piston connecting rod is pushed by the airflow to move toward the moving part of the headrest, the compression of the spring can play a buffering role to prevent the gas from generating a large impact on the piston connecting rod.

[0029] (4) In the headrest device described in the present invention, the buffer block can avoid a large impact force generated when the piston connecting rod contacts the buffer block, thereby preventing the force from causing damage or discomfort to the occupant's head, thereby increasing the safety and comfort of the headrest device.

[0030] (5) The headrest device described in the present invention can automatically adjust the device triggering time according to the distance between the occupant's head and the moving part of the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0032] Figure 1 is a schematic diagram of a headrest device according to an embodiment of the present invention when it is not triggered;

[0033] Figure 2 It is a schematic diagram of the headrest moving part after the headrest device according to the embodiment of the present invention is triggered.

[0034] Description of reference numerals:

[0035] 1-headrest; 11-moving part of the headrest; 12-fixing part of the headrest; 13-pressure sensor; 2-cylinder; 21-cylinder displacement sensor; 22-spring; 23-buffer block; 4-controller; 5-inflating pipe; 6-inflating device; 7-deflation pipe; 8-headrest rod; 9-occupant head displacement sensor; 10-piston connecting rod; 101-first rod; 102-second rod; 103-third rod. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] like Figure 1-2As shown, an active protection headrest device includes a headrest 1, a piston connecting rod 10, and a controller 4. The headrest 1 includes a movable headrest moving part 11 and a headrest fixing part 12 fixed on the car seat. A cylinder 2 is arranged in the headrest fixing part 12. The inner wall of the cylinder 2 is slidably connected to one end of the piston connecting rod 10, and the other end of the piston connecting rod 10 is fixed to the headrest moving part 11. The end of the cylinder 2 away from the headrest moving part 11 is connected to an inflation device 6, and the side wall of the cylinder 2 is also connected to an air release pipe 7. The inflation device 6 is electrically connected to the controller 4.

[0041] The device can automatically adjust the pressure relief time according to the contact pressure between the occupant's head and the headrest moving part 11 to prevent unnecessary injuries. It is highly flexible and suitable for protection in different situations. It has a wide range of applications and strong flexibility.

[0042] When a rear-end collision occurs, it can be activated in time to protect the occupant's neck to avoid neck injuries, and can automatically adjust the position of the headrest 1 according to the different occupant status to meet the riding safety requirements of different users.

[0043] It also includes a sensor component, which includes an occupant head displacement sensor 9, a pressure sensor 13, and a cylinder displacement sensor 21, all of which are electrically connected to the controller 4.

[0044] The occupant head displacement sensor 9 is disposed below the headrest fixing portion 12 , the pressure sensor 13 is disposed at one end of the headrest moving portion 11 away from the headrest fixing portion 12 , and the cylinder displacement sensor 21 is disposed on the inner wall of the cylinder 2 .

[0045] The piston connecting rod 10 includes a first rod 101 , a second rod 102 , and a third rod 103 connected in sequence. The first rod 101 is located in the headrest moving part 11 , the third rod 103 is located in the cylinder 2 , and the third rod 103 is slidably connected to the inner wall of the cylinder 2 .

[0046] When the inflator 6 continuously inflates the cylinder 2, the airflow pushes the third rod 103 to move toward the headrest moving portion 11, and then the piston connecting rod 10 pushes the headrest moving portion 11 to move away from the headrest fixing portion 12. When the third rod 103 moves, the cylinder displacement sensor 21 can collect the displacement of the third rod 103 in real time.

[0047] It also includes at least one spring 22 , which is located between the first rod 101 and the third rod 103 , one end of the spring 22 is connected to the inner wall of the cylinder 2 , and the other end of the spring 22 is connected to the third rod 103 .

[0048] A spring 22 is arranged in the cylinder 2. When the piston connecting rod 10 is pushed by the airflow to move toward the headrest moving part 11, the compression of the spring 22 can play a buffering role to prevent the gas from having a large impact on the piston connecting rod 10, thereby improving safety.

[0049] The cylinder displacement sensor 21 is located between the first rod 101 and the third rod 103 .

[0050] The air cylinder 2 further comprises a buffer block 23 , which is located between the third rod 103 and the inflatable device 6 , and is fixed to the inner wall of the cylinder 2 .

[0051] The buffer block 23 is made of elastic material.

[0052] The buffer block 23 is preferably made of elastic rubber material.

[0053] The buffer block 23 can prevent a large impact force from being generated when the piston connecting rod 10 contacts the buffer block 23, thereby preventing the force from causing damage or discomfort to the occupant's head, thereby increasing the safety and comfort of the headrest device.

[0054] It also includes a headrest rod 8, one end of the headrest rod 8 extends into the headrest fixing part 12, and the other end of the headrest rod 8 extends out of the headrest fixing part 12, and the occupant head displacement sensor 9 is located on the headrest rod 8, and the occupant head displacement sensor 9 is located between the headrest moving part 11 and the headrest rod 8.

[0055] The occupant head displacement sensor 9 can collect the displacement of the occupant in real time and transmit the collected data to the controller 4, and the controller 4 controls the start or stop time of the protection mechanism.

[0056] The headrest fixing portion 12 is connected to the inflation device 6 via an inflation tube 5 , and an inflation valve is provided in the inflation tube 5 .

[0057] There are two air release pipes 7 , which are respectively located at two sides of the cylinder 2 , and each air release pipe 7 is provided with an air release valve.

[0058] The inflation valve and the deflation valve are both electrically connected to the controller 4 .

[0059] The headrest 1 comprises an inner shell made of polyurethane foam and a cover wrapping the inner shell.

[0060] The face cover is made of fabric or leather material and is wrapped around the outer surface of the headrest 1 to play a cushioning role.

[0061] The pressure sensor 13 is located between the inner liner and the face cover.

[0062] The pressure sensor 13 can collect the pressure between the occupant's head and the headrest moving part 11 in real time.

[0063] By providing the occupant head displacement sensor 9, the pressure sensor 13, and the cylinder displacement sensor 21, the collected data can be transmitted to the controller 4 in real time, and then the controller 4 can flexibly and quickly adjust the inflation or deflation of the device, making the device more flexible and safer.

[0064] Specific use process:

[0065] During actual use, the headrest fixing part 12 is fixed to the car seat, the inflatable device 6 and the sensor 4 are fixed to the back of the car seat, the controller 4 is connected to the car safety system, and the occupant head displacement sensor 9, the pressure sensor 13, the cylinder displacement sensor 21, and the inflatable device 6 are all electrically connected to the controller 4.

[0066] When the automobile safety system detects that a rear-end collision has occurred, the occupant head displacement sensor 9 sends the collected occupant displacement signal to the controller 4, and the controller 4 controls the inflator 6 to inflate the cylinder 2, and at the same time opens the inflator valve and closes the deflation valve. At this time, the inflator 6 continuously inflates the cylinder 2, and the airflow pushes the piston connecting rod 10 to move toward the headrest moving part 11, and then the piston connecting rod 10 pushes the headrest moving part 11 to move away from the headrest fixing part 12 until the headrest moving part 11 contacts the occupant's head.

[0067] At this time, the pressure sensor 13 will collect the pressure signal and transmit it to the controller 4. When the pressure value reaches the set value, the controller 4 controls the inflation valve and the inflation device 6 to close, and opens the air release valve. At this time, the cylinder 2 releases air outward, causing the piston connecting rod 10 to move away from the headrest moving part 11, and then drives the headrest moving part 11 to move towards the headrest fixed part 12. When the controller 4 detects that the pressure value collected by the pressure sensor 13 is small, it will close the air release valve until the pressure value reaches a suitable value before continuing to open the air release valve, so as to ensure that the head is within a suitable pressure range throughout the process. When the piston connecting rod 10 continues to move away from the headrest moving part 11 until it abuts against the buffer block 23, the controller 4 closes the air release valve 12 and the whole process ends.

[0068] When the cylinder displacement sensor 21 detects that the piston connecting rod 10 has moved to the extreme position, the head is still not in contact with the headrest moving part 11. At this time, the controller 4 controls the inflation valve and the inflation device 6 to be closed. At this time, the piston connecting rod 10 remains stationary until the headrest 1 contacts the head moving part, and then the above operation is performed.

[0069] It is worth noting that when the pressure value collected by the pressure sensor 13 is smaller than the preset value, both the inflation valve and the deflation valve are closed until the pressure reaches the preset value, and then the deflation valve is opened. When the pressure value collected by the pressure sensor 13 is larger than the preset value, the deflation valve is opened, and the headrest moving part 11 moves toward the headrest fixing part 12 until the piston connecting rod 10 abuts against the buffer block 23, and the deflation valve is closed, and the process ends.

[0070] When the headrest moving part 11 finally fails to reach the reset position, the device will remind the occupant that the occupant can manually push the headrest moving part 11 to the original position without causing any impact on the device.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An active protective headrest device, characterized in that: The invention comprises a headrest (1), a piston connecting rod (10), and a controller (4); the headrest (1) comprises a movable headrest moving part (11), and a headrest fixing part (12) fixed on the car seat; a cylinder (2) is arranged in the headrest fixing part (12); the inner wall of the cylinder (2) is slidably connected to one end of the piston connecting rod (10); the other end of the piston connecting rod (10) is fixed to the headrest moving part (11); the end of the cylinder (2) away from the headrest moving part (11) is connected to an inflation device (6); the side wall of the cylinder (2) is also connected to an air release pipe (7); and the inflation device (6) is electrically connected to the controller (4); The piston connecting rod (10) comprises a first rod (101), a second rod (102), and a third rod (103) which are connected in sequence, the first rod (101) being located in the headrest moving part (11), the third rod (103) being located in the cylinder (2), and the third rod (103) being slidably connected to the inner wall of the cylinder (2); It also includes at least one spring (22), the spring (22) is located between the first rod (101) and the third rod (103), one end of the spring (22) is connected to the inner wall of the cylinder (2), and the other end of the spring (22) is connected to the third rod (103); It also includes a sensor assembly, which includes an occupant head displacement sensor (9), a pressure sensor (13), and a cylinder displacement sensor (21), all of which are electrically connected to the controller (4); The cylinder displacement sensor (21) is located between the first rod (101) and the third rod (103); It also includes a buffer block (23), the buffer block (23) is located between the third rod (103) and the inflation device (6), and the buffer block (23) is fixed to the inner wall of the cylinder (2); The occupant head displacement sensor (9) is arranged below the headrest fixing portion (12), the pressure sensor (13) is arranged at one end of the headrest moving portion (11) away from the headrest fixing portion (12), and the cylinder displacement sensor (21) is arranged on the inner wall of the cylinder (2); Two deflation pipes (7) are provided, and the two deflation pipes (7) are respectively located on both sides of the cylinder (2). A deflation valve is provided in the deflation pipe (7), and both the inflation valve and the deflation valve are electrically connected to the controller (4); By setting up an occupant head displacement sensor, a pressure sensor, and a cylinder displacement sensor, the collected data is transmitted to the controller in real time, and then the inflation or deflation of the device is adjusted through the controller.

2. The active protection headrest device according to claim 1, characterized in that: It also comprises a headrest rod (8), one end of which extends into the headrest fixing portion (12), and the other end of which extends out of the headrest fixing portion (12), and the occupant head displacement sensor (9) is located on the headrest rod (8), and the occupant head displacement sensor (9) is located between the headrest moving portion (11) and the headrest rod (8).

3. The active protection headrest device according to claim 1, characterized in that: The headrest fixing portion (12) is connected to the inflation device (6) via an inflation tube (5), and an inflation valve is provided in the inflation tube (5).

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