CN210139848U

CN210139848U - Ceiling safety airbag device

Info

Publication number: CN210139848U
Application number: CN201921072705.9U
Authority: CN
Inventors: 杨涛; 杨丽丽
Original assignee: Ningbo Cheng Sheng Automobile Safety System Co Ltd
Current assignee: Ningbo Cheng Sheng Automobile Safety System Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-03-13
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses a ceiling air bag device relates to the passive safe technical field of car. One embodiment of the ceiling airbag device includes: the gas bag comprises a shell, a gas generator, a gas bag, a limiting pull belt and a wrapping bag; the gas generator is assembled in the gas bag, and the gas bag is assembled in the wrapping bag after being folded; the air bag is provided with a supporting hole; one end of the limiting drawstring is fixed in the air bag, and the other end of the limiting drawstring penetrates through the support hole and then is fixed outside the air bag. On one hand, the embodiment can avoid the problem of insufficient support for passengers caused by too low expansion position and too slow rebound of the air bag, and improve the protection performance of the ceiling safety air bag device; on the other hand, the impact on surrounding environment parts can be reduced, and the safety of the surrounding environment of the ceiling safety air bag device is ensured.

Description

Ceiling safety airbag device

Technical Field

The utility model relates to a car passive safety technical field especially relates to a ceiling air bag device.

Background

A roof front protection airbag, which is a new type of airbag, is installed in a roof above a sun visor, and extends between a front windshield and the roof when operating, and is deployed between an occupant and an IP (instrument panel). The difficulty of the ceiling air bag in the development process mainly comprises the following two problems, namely the problem of damage to an environmental part caused by overlarge impact on the surrounding environmental part in the explosion process of the ceiling air bag, and the problem of insufficient support to the head of a passenger caused by the fact that the ceiling air bag is directly unfolded downwards along the Z direction along the airflow direction. The two difficulties are mutually restricted, and the most effective method for solving the problem of insufficient head support of the passenger by the ceiling air bag is to deploy the air bag in front of the head of the passenger, but environmental parts around the ceiling air bag can be directly damaged by the air bag.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides a ceiling airbag device, which on one hand can avoid the problem of insufficient support for passengers due to too low deployment position and too slow rebound of the airbag, and improve the protection performance of the ceiling airbag device; on the other hand, the impact on surrounding environment parts can be reduced, and the safety of the surrounding environment of the ceiling safety air bag device is ensured.

According to the utility model discloses ceiling air bag device, include: the gas bag comprises a shell, a gas generator, a gas bag, a limiting pull belt and a wrapping bag; the gas generator is assembled in the gas bag, and the gas bag is assembled in the wrapping bag after being folded; the air bag is provided with a supporting hole; one end of the limiting drawstring is fixed in the air bag, and the other end of the limiting drawstring penetrates through the support hole and then is fixed outside the air bag.

Optionally, the air bag comprises: the air bag neck part is connected with the inflation inlet of the gas generator, and the air bag supporting part is communicated with the air bag neck part and provides support for the passengers after being unfolded from the packaging bag; the support hole is arranged on the neck part of the air bag, one end of the limit drawstring is fixed at the bottom in the air bag, and the other end of the limit drawstring penetrates through the support hole and then is fixed outside the air bag support part.

Optionally, the ceiling airbag device further comprises: and the limiting part is arranged on the limiting pull belt and is positioned outside the air bag.

Optionally, the ceiling airbag device further comprises: and the sealing part is arranged on the limiting part.

Optionally, the limit pull tape includes: the stretching strap body sets up the spacing hole of stretching strap on the stretching strap body to and one end is fixed in the gas pocket, movably setting up the stretching strap on the spacing hole of stretching strap behind the other end runs through support hole and the spacing hole of stretching strap.

Optionally, the limit drawstring comprises two drawstrings, and the air bag is provided with two support holes.

Optionally, the ceiling airbag device further comprises: and the guide sheet is arranged between the gas generator and the shell.

Optionally, the housing comprises:

a housing body providing a mounting interface for assembling the gas generator and the gas bag;

and the mounting bracket is arranged on the shell body and used for assembling the shell body between the top beam of the vehicle body and the ceiling.

An embodiment in the above-mentioned utility model has following advantage or beneficial effect: when the neck of the air bag moves downwards along the Z direction under the thrust action of the gas generator, the limit drawstring can simultaneously pull the air bag supporting part for supporting the head of the passenger upwards, so that the air bag supporting part rapidly reaches the designed position to provide support for the head of the passenger; when a passenger contacts with the air bag supporting part, the limiting drawstring can pull the bottom of the air bag upwards to reduce the volume of the bottom of the air bag, so that the air bag can support the passenger more sufficiently. The embodiment of the utility model ensures the in-place time of the air bag supporting part by adding the design of the limiting drawstring, does not worry about the problem of insufficient supporting for passengers caused by too low expansion position and too slow rebound of the air bag, and improves the protective performance of the ceiling safety air bag device; in addition, the embodiment of the utility model provides a can make gasbag main part promptly the air pocket support part begin to expand in the position farther apart from the sunshading board, guarantee the safety of ceiling air bag device surrounding environment.

Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

fig. 1 is a schematic view of an installation position of a ceiling airbag device according to an embodiment of the present invention;

fig. 2 is a schematic view of a ceiling airbag device according to an embodiment of the present invention;

fig. 3 is a schematic view of a ceiling airbag device according to an embodiment of the present invention when the occupant is not in contact with the air bag when the ceiling airbag device is operated;

fig. 4 is a schematic view of a ceiling airbag device according to an embodiment of the present invention when an occupant is in contact with an air bag during operation;

fig. 5 is a schematic view showing the connection between the air bag and the position-restricting drawstring in the ceiling airbag device according to the embodiment of the present invention;

fig. 6 is a schematic view of a drawstring limiting hole in a ceiling airbag device according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

In the prior art, when a ceiling airbag is operated, an airbag extends out from a space between a front windshield and a ceiling and then is deployed between a passenger and an IP. In addition, the air bag is directly unfolded downwards along the Z direction due to the flowing direction of air flow, so that the problem of insufficient head support of passengers is caused. In view of this, the present invention provides a limit strap on the air bag to limit the movement of the air bag during the deployment of the air bag.

Example one

Referring to fig. 1, an overhead air bag system 100 according to an embodiment of the present invention is installed in a roof 300 of a vehicle body, and is fixed to a roof beam 200 of the vehicle body and located directly above a sun visor 400. Referring to fig. 2 to 4, a ceiling airbag device 100 according to an embodiment of the present invention includes: the gas generator comprises a shell 10, a gas generator 20, a gas bag 30, a limit pull belt 40 and a wrapping bag 50; the gas generator 20 is mounted inside the airbag 30 for supplying energy and gas for the deployment of the airbag 30, so that the airbag 30 can be deployed along the front windshield 500 to provide support protection for the occupant. The air bag 30 is folded and assembled in the wrapping bag 50; the air bag 30 is provided with a support hole 60; one end of the position-limiting drawstring 40 is fixed in the air bag 30, and the other end thereof is fixed outside the air bag 30 after penetrating the support hole 60. The connection between the airbag 30 and the housing 10 can be selectively set according to the actual situation, for example, the airbag 30 is directly fixed to the housing 10 by bolts, or the airbag 30 is fixed to the housing 10 by bolts of the gas generator 20.

Before the occupant is not in contact with the airbag 30 (i.e., the airbag) at the initial stage of operation of the ceiling airbag apparatus 100, the inflator 20 inflates the airbag 30, so that the airbag 30 is extended from the ceiling 300 and deployed downward along the front windshield 500. In the moving process, the air flow generated by the gas generator moves downwards from the part (for convenience of expression, hereinafter referred to as an air bag neck part) where the air bag is connected with the inflation inlet of the gas generator, the bottom of the air bag is driven to move downwards quickly, a part (namely, the part connected with the other end of the limiting drawstring 40, for convenience of expression, hereinafter referred to as an air bag supporting part) of the air bag is driven to move upwards through the limiting drawstring 40, and when the upper end of the air bag supporting part moves to the limit position, the upward movement is not continued, so that the downward moving air flow changes the direction, the air bag supporting part is inflated quickly, and a certain buffer distance is ensured to exist between the air bag supporting part and the air bag neck. At the moment that the passenger contacts with the air bag, the air bag can provide certain support protection for the passenger, and meanwhile, the air bag can play a role in buffering protection, so that the overhigh neck injury caused by the backward bending of the head of the passenger is avoided. In this process of support protection and cushion protection, it is mainly the bag support portion that is providing protection to the occupant, and therefore the bag support portion needs to be moved toward the neck of the bag, consuming space between the bag support portion and the neck of the bag. Meanwhile, the air bag supporting part moves downwards, the limiting drawstring 40 drives the bottom of the air bag to move upwards, and in the process of moving the bottom of the air bag upwards, the Y-direction width of the bottom of the air bag is increased, so that the upper half of the passenger is supported. The Y direction in this example means the occupant left-right direction. The bottom of the air bag means the bottom of the entire air bag. Since the bag support portion and the bag neck portion are divided for convenience of description, and there is no strict boundary therebetween, the bag bottom portion may be located at the bottom of the bag support portion or at the bottom of the bag neck portion.

In the utility model, when the neck of the air bag moves downwards along the Z direction under the thrust action of the gas generator, the air bag supporting part for supporting the head of a passenger can be simultaneously pulled upwards by the limiting drawstring, so that the air bag supporting part rapidly reaches the designed position to support the head of the passenger; when a passenger contacts with the air bag supporting part, the limiting drawstring can pull the bottom of the air bag upwards to reduce the volume of the bottom of the air bag, so that the air bag can support the passenger more sufficiently. The embodiment of the utility model ensures the in-place time of the air bag supporting part by adding the design of the limiting drawstring, does not worry about the problem of insufficient supporting for passengers caused by too low expansion position and too slow rebound of the air bag, and improves the protective performance of the ceiling safety air bag device; in addition, the embodiment of the present invention can make the airbag main body, i.e. the airbag supporting portion, start to be deployed at a position farther from the sun visor 400, thereby ensuring the safety of the surrounding environment of the ceiling airbag device.

In an alternative embodiment, gas pouch 30 comprises: an air bag neck part 31 connected to an inflation port of the gas generator 20, and an air bag support part 32 communicating with the air bag neck part 31 and providing support to an occupant after being deployed from the packing bag 50. The support hole 60 is provided on the neck part 31 of the air bag, and one end of the position-restricting drawstring 40 is fixed to the bottom inside the air bag, and the other end thereof is fixed to the outside of the air bag support part 32 after passing through the support hole 60. The support hole is arranged at the air guide part of the air bag, and can provide support and positioning functions for the movement of the limit drawstring.

In an alternative embodiment shown in fig. 3, the ceiling airbag device 100 may further include: and a stopper 70 provided on the stopper belt 40 and located outside the airbag 30. The specific form of the limiting part can be selectively set according to actual conditions. For example, a knot is tied to the position-restricting drawstring, and the knot is used as a position-restricting part; for another example, a member having a diameter larger than that of the support hole is fixed or sewn to the stopper pull tape as a stopper portion. Further, the ceiling airbag device 100 may further include: and a sealing portion (not shown) provided on the stopper portion 70. When the air bag supporting part moves upwards to the limit position, the sealing part on the limiting part 70 is in interference fit with the supporting hole 60 on the air bag, so that the limiting function of the limiting pull belt is realized, and the function of sealing the supporting hole is realized.

The ceiling airbag device 100 according to the embodiment of the present invention may further include: and a guide piece (not shown) disposed between the gas generator 20 and the housing 10. The guide sheet can guide the gas generated by the gas generator into the air bag quickly, has a heat insulation effect, and prevents the air bag from being scalded by high-temperature gas generated when the gas generator works. The structure of the guide sheet can be selectively set according to actual conditions. For example, a U-shaped structure that opens toward the front of the vehicle body is provided, one side edge of the U-shaped structure is fitted to the housing body, and the gas generator is fitted in a cavity of the U-shaped structure. The heat insulation sheet with the U-shaped structure can quickly guide gas generated by the gas generator into the air bag, and the gas can be smoothly guided into the air bag when the two-stage generator works separately. Of course, the guide plate may be provided in a plate-like structure or an arc-shaped structure, etc.

The housing 10 is mainly used for mounting the air bag 30 and other components between the roof rail 200 and the ceiling 300, and the specific structure thereof may be selectively designed according to the actual situation, for example, a flat plate structure or an L-shaped structure is adopted. In this example, in the present invention, the housing 10 includes: a housing body providing a mounting interface for assembling the gas generator 20 and the gas bag 30; and a mounting bracket 11 provided on the housing body for assembling the housing body between the body cap 200 and the ceiling 300. The shape of the mounting bracket 11 can be selectively designed according to actual conditions, for example, the mounting bracket 12 has an L-shaped structure, an i-shaped structure or an H-shaped structure. The number of the mounting brackets 11 can be selectively designed according to the actual situation, for example, four or six mounting brackets 11 are connected to the car body top beam 200 on the housing body. The shell adopting the structure has the advantages of simple structure, light weight and low cost.

Example two

Referring to fig. 5 and 6, the difference between this example and the first embodiment is that:

the limit drawstring 40 includes: the air bag comprises a drawstring body 41, a drawstring limiting hole 42 arranged on the drawstring body 41, and a drawstring 43, one end of which is fixed in the air bag 30, and the other end of which penetrates through a supporting hole 60 and the drawstring limiting hole 42 and then is movably arranged on the drawstring limiting hole 42. As shown in fig. 5, the position-limiting pull tape 40 may include two pull tapes 43, and two support holes 60 are formed on the air bag 30. Of course, the restraining draw tape 40 may also include one, three or more draw tapes 43.

When the occupant is not in contact with the airbag, the bottom of the neck part of the airbag moves downward, the drawstring 43 drives the support part of the airbag to move upward, and when the drawstring 43 moves downward to the limit position a of the drawstring limiting hole 42, the drawstring 43 is limited by the neck part of the airbag, thereby limiting the movement of the bottom part of the airbag and the support part of the airbag. When the passenger contacts the airbag, the head of the passenger applies force to the airbag supporting part to move the airbag supporting part downwards, so that the drawstring 43 drives the bottom of the airbag to move upwards, the bottom of the airbag widens towards the Y direction, and the upper body of the passenger is supported. The limit position B of the limit hole can limit the amount of movement of the air bag supporting part and the air bag bottom in the movement process so as to ensure that the air bag can effectively support and protect passengers.

According to the technical scheme of the embodiment of the utility model, on one hand, the problem of insufficient support for passengers caused by too low expansion position and too slow rebound of the air bag can be avoided, and the protective performance of the ceiling safety air bag device is improved; on the other hand, the impact on surrounding environment parts can be reduced, and the safety of the surrounding environment of the ceiling safety air bag device is ensured.

The above detailed description does not limit the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ceiling airbag device (100), comprising: the gas bag comprises a shell (10), a gas generator (20), a gas bag (30), a limiting pull belt (40) and a wrapping bag (50); the gas generator (20) is assembled inside the gas bag (30), and the gas bag (30) is assembled inside the wrapping bag (50) after being folded; the air bag (30) is provided with a support hole (60); one end of the limiting drawstring (40) is fixed in the air bag (30), and the other end thereof penetrates through the supporting hole (60) and then is fixed outside the air bag (30).

2. The ceiling airbag device (100) of claim 1, characterized in that the airbag (30) comprises: an air bag neck portion (31) connected to an inflation port of the inflator (20), and an air bag support portion (32) communicating with the air bag neck portion (31) and extending out of the wrapping bag (50) to provide support for an occupant; the supporting hole (60) is arranged on the neck part (31) of the air bag, one end of the limiting drawstring (40) is fixed at the bottom in the air bag, and the other end of the limiting drawstring penetrates through the supporting hole (60) and then is fixed outside the air bag supporting part (32).

3. The ceiling airbag device (100) of claim 2, further comprising: and a limiting part (70) which is arranged on the limiting drawstring (40) and is positioned outside the air bag (30).

4. The ceiling airbag device (100) according to claim 3, further comprising: and a sealing part arranged on the limiting part (70).

5. The ceiling airbag device (100) of claim 2, characterized in that the check pull strap (40) comprises: the air bag comprises a drawstring body (41), a drawstring limiting hole (42) arranged on the drawstring body (41), and a drawstring (43) with one end fixed in the air bag (30) and the other end penetrating through the support hole (60) and the drawstring limiting hole (42) and then movably arranged on the drawstring limiting hole (42).

6. A ceiling airbag device (100) according to claim 5, characterized in that the retaining strap (40) comprises two straps (43), and the airbag (30) is provided with two support holes (60).

7. The ceiling airbag device (100) according to any one of claims 1 to 6, further comprising: and a guide piece disposed between the gas generator (20) and the housing (10).

8. The ceiling airbag device (100) according to any one of claims 1 to 6, characterized in that the housing (10) comprises:

a housing body providing a mounting interface for mounting the gas generator (20) and the gas bag (30);

and the mounting bracket (11) is arranged on the shell body and used for assembling the shell body between the top beam (200) of the vehicle body and the ceiling (300).