Automobile back cushion

Abstract

The utility model relates to the field of automobile parts, in particular to an automobile back cushion which comprises a back cushion body and a lifting adjusting mechanism and further comprises a first air bag, and the first air bag is folded and installed on the side, close to the back side of the head of a human body, of the back cushion body in a covering mode. The second air bag is folded and mounted on the side wall of the back cushion body in a covering manner, and the first air bag is communicated with the second air bag; the gas generator is mounted in the first air bag or the second air bag; the electronic control unit is in electric signal connection with the gas generator; when the collision strength reaches a preset value, the electronic control unit sends a starting instruction to the gas generator. According to the scheme, the gas generator inflates the first air bag and the second air bag which communicate with each other, the first air bag can protect the back side of the head of a driver, and at the moment, the first air bag can make up for the effect of insufficient buffering caused by collapse of the filling material due to long-time compression.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, especially to an automobile headrest. BACKGROUND

[0002] The automobile headrest is usually called a headrest, which is an important component of a seat safety system. The headrest can limit the head backward amplitude in a rear-end collision, reduce the risk of excessive extension of the cervical spine, prevent the head from swinging violently in a frontal or side collision, and reduce the fatigue of the driver's neck muscles in daily use.

[0003] After long-term use of the automobile headrest, the driver's head will often lean on the headrest. The headrest is composed of a supporting rod, a filling material, an outer fabric, an adjustable mechanism, etc. The filling material in the headrest is prone to collapse under long-term pressure. When facing a rear-end collision, the buffering effect of the filling material in the headrest is reduced, which can easily cause damage to the driver's neck or head. At the same time, the existing headrests mostly only support the back of the driver's head. When the car encounters a radial impact on the vehicle, the left and right sides of the driver's head are impacted, and the driver's neck and head are difficult to obtain left and right support or buffering, which can also easily cause damage to the driver's neck or head. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides an automobile headrest to solve the problem that the filling material in the headrest is prone to collapse under long-term pressure, and the buffering effect of the filling material in the headrest is reduced.

[0005] In order to achieve the above-mentioned purpose, the basic scheme of the utility model is as follows: an automobile headrest, comprising a headrest body and a lifting adjusting mechanism, further comprising:

[0006] A first air bag is folded and covered and installed on one side of the headrest body close to the back of the head;

[0007] A second air bag is folded and covered and installed on the side wall of the headrest body, and the first air bag and the second air bag are communicated;

[0008] A gas generator is installed in the first air bag or the second air bag;

[0009] An electronic control unit is electrically connected with the gas generator. When the collision intensity reaches a preset value, the electronic control unit sends a starting instruction to the gas generator.

[0010] The utility model discloses a technical principle for: the backrest body is in use, first the gas generator and electronic control unit carry out electric connection, and the electric connection line between the gas generator and electronic control unit has the margin for the lifting adjusting mechanism of backrest body to carry out the lifting adjustment, in the daily use process, backrest body only needs to carry out the lifting adjustment according to the cooperation of lifting adjusting mechanism and car seat.

[0011] When the collision intensity reaches the preset value, the electronic control unit sends a start instruction to the gas generator, the gas generator inflates the first gas bag and the second gas bag in communication, and the first gas bag can protect the back of the head of the driver; At this time, the first gas bag can compensate for the insufficient buffering effect caused by the collapse of the filling material due to long-term compression; The expanded second gas bag compresses to support the side of the driver, avoiding the left and right swinging of the head and neck when impacted.

[0012] Further, the edge of one side of the second gas bag extends beyond the range of the backrest body, and the side of the second gas bag extends to the ear side of the human body.

[0013] Through the above setting, the side wall of the backrest body can guide the extension direction of the second gas bag when it expands, so that the second gas bag supports the ear side of the human body after expansion, reducing the left and right shaking of the human neck and head, and reducing the impact on the neck and head.

[0014] Further, the number of second gas bags is two, and the two second gas bags are respectively located at the two sides of the backrest body close to the first gas bag.

[0015] Through the above setting, the first gas bag and the second gas bag can cooperate with the airbag at the steering wheel on the vehicle to more comprehensively buffer and protect the head of the human body, improving the safety guarantee of driving.

[0016] Further, it also includes a communication pipe, which communicates the upper ends of the two second gas bags, and the communication pipe is installed along the side edge of the top of the backrest body away from the first gas bag.

[0017] Through the above setting, the communication pipe can communicate with the top of the two second gas bags, so that the top of the two second gas bags can also be inflated more evenly, improving the uniformity of the expansion of the two second gas bags after instantaneous inflation.

[0018] Further, the lower side of the first gas bag extends to the middle of the lower side of the backrest body.

[0019] Through the above setting, when the first gas bag expands, the lower part of the first gas bag can also expand, which can buffer and support the neck of the human body.

[0020] Further, the gas generator is installed in the side of the first gas bag close to the middle of the lower side of the backrest body.

[0021] With the above settings, when the first airbag inflates, the lower part of the first airbag will inflate first, giving priority to supporting the neck and preventing excessive head movement.

[0022] Furthermore, the gas generator is a knee airbag generator.

[0023] With the above configuration, the knee airbag generator is a miniaturized design of a gas generator, which makes it easy to install in the confined space between the top of the car seat and the underside of the headrest. When in use, the knee airbag generator can generally spray 40-60 liters, which is enough to inflate the first and second airbags. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a car headrest in the axial direction according to an embodiment of the present invention.

[0025] Figure 2 This is a longitudinal sectional view of a car headrest according to an embodiment of the present utility model.

[0026] Figure 3 This is a cross-sectional view of a car headrest according to an embodiment of the present utility model.

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0028] In the above-mentioned attached figures: the pillow body 10, the first airbag 20, the second airbag 30, the connecting pipe 40, the gas generator 50, and the lifting and adjusting mechanism 60. Detailed Implementation

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0030] This embodiment is basically as follows: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model embodiment proposes a car headrest, including a headrest body 10, a lifting adjustment mechanism 60, a first airbag 20, a second airbag 30, a connecting pipe 40, a gas generator 50, and an electronic control unit. The lifting adjustment mechanism 60 consists of two notched rods that cooperate with the car seat, and the two notched rods are vertically fixed on the lower side of the headrest body 10.

[0031] like Figure 1 and Figure 2 As shown, the first airbag 20 is folded and installed on the side of the pillow body 10 near the back of the head. The lower side of the first airbag 20 extends to the middle of the lower side of the pillow body 10. The first airbag 20 is sewn in a dotted manner with cotton thread around its perimeter. When sewing, a single layer of thread is used to sew around the perimeter.

[0032] like Figure 1 , Figure 3 and Figure 4 As shown, there are two second airbags 30. The second airbags 30 are folded and installed on the side wall of the pillow body 10, and are also folded and installed inside the outer shell on the side of the pillow body 10. The first airbag 20 communicates with the second airbag 30. Simultaneously, the left edge of the second airbag 30 extends beyond the area of ​​the pillow body 10, and one side of the second airbag 30 extends towards the ear of the user. Each second airbag 30 is located on both sides of the pillow body 10 near the first airbag 20. Figure 4 As shown, the right end of the second airbag 30 is partially compressed inside the outer shell on the side of the pillow body 10.

[0033] At the same time, such as Figure 1 and Figure 2 As shown, the connecting tube 40 connects to the upper ends of the two second airbags 30, and the connecting tube 40 is sewn and installed along the edge of the top of the pillow body 10 away from the first airbag 20.

[0034] The electronic control unit is electrically connected to the gas generator 50; when the collision intensity reaches a preset value, the electronic control unit sends a start command to the gas generator 50; simultaneously... Figure 2 As shown, the gas generator 50 is installed inside the first airbag 20 on one side near the middle of the lower side of the headrest body 10.

[0035] In addition, the gas generator 50 is a knee airbag generator. The knee airbag generator is a miniaturized design of the gas generator 50, which makes it easy to install in the confined space between the top of the car seat and the underside of the headrest body 10. At the same time, the knee airbag generator can generally spray 40-60 liters when in use, which is enough to inflate the first airbag 20 and the second airbag 30.

[0036] In this embodiment, when a car headrest is in use, the gas generator 50 and the electronic control unit are first electrically connected. The electrical connection line between the gas generator 50 and the electronic control unit has slack for the lifting and adjusting mechanism 60 of the headrest body 10 to adjust the height.

[0037] In daily use, the headrest body 10 only needs to be adjusted in height according to the coordination between the lifting and adjusting mechanism 60 and the car seat.

[0038] When the collision intensity reaches a preset value, the electronic control unit sends a start command to the gas generator 50. The gas generator 50 generates nitrogen gas by igniting a solid propellant (such as sodium azide NaN3). The nitrogen gas quickly fills the lower side of the first airbag 20 and rapidly expands to the upper side of the first airbag 20. As the first airbag 20 expands, it breaks the cotton thread that compresses the first airbag 20, and then the first airbag 20 quickly deploys. The first airbag 20 can protect the back of the driver's head. At this time, the first airbag 20 can compensate for the insufficient cushioning effect caused by the collapse of the filling material due to prolonged pressure.

[0039] At the same time, nitrogen gas quickly enters the second airbag 30 through the first airbag 20. The section of the second airbag 30 compressed at the side wall of the headrest body 10 also quickly expands. The expanded second airbag 30 is compressed into a sheet-like airbag, so the second airbags 30 on both sides can support the driver's left and right sides and prevent the head and neck from swinging left and right when impacted.

[0040] When the first airbag 20 inflates, the lower part of the first airbag 20 inflates first, prioritizing support for the neck and preventing excessive head movement. At the same time, the first airbag 20 and the second airbag 30 work together with the airbag at the steering wheel to provide comprehensive front-to-back and side-to-side cushioning protection for the head, improving driving safety.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A car headrest, comprising a headrest body and a lifting and adjusting mechanism, characterized in that, Also includes: The first airbag is folded and installed on the side of the pillow body near the back of the human head. The second airbag is folded and installed on the side wall of the headrest body, and the first airbag is connected to the second airbag. A gas generator, wherein the gas generator is installed inside a first airbag or a second airbag; An electronic control unit is electrically connected to the gas generator; when the collision intensity reaches a preset value, the electronic control unit sends a start command to the gas generator.

2. A car headrest as described in claim 1, characterized in that, The edge of one side of the second airbag extends beyond the range of the pillow body, and the side of the second airbag extends toward the ear of the human body.

3. A car headrest as described in claim 2, characterized in that, There are two second airbags, and the two second airbags are located on both sides of the headrest body near the first airbag.

4. A car headrest as described in claim 3, characterized in that, It also includes a connecting tube that connects to the upper ends of the two second airbags, and the connecting tube is installed along the edge of the top of the headrest body away from the first airbag.

5. A car headrest as described in any one of claims 1-4, characterized in that, The lower side of the first airbag extends to the middle of the lower side of the headrest body.

6. A car headrest as described in claim 5, characterized in that, The gas generator is installed on one side of the first airbag, near the middle of the lower side of the headrest body.

7. A car headrest as described in claim 1, characterized in that, The gas generator is a knee airbag generator.

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