CN219717331U

CN219717331U - Gasbag terminal safety cover

Info

Publication number: CN219717331U
Application number: CN202320694090.3U
Authority: CN
Inventors: 童渊源; 钱超超; 薛天洋
Original assignee: Zf Automotive Safety Systems Rizhao Co ltd
Current assignee: Zf Automotive Safety Systems Rizhao Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-09-19
Anticipated expiration: 2033-03-29

Abstract

The utility model provides an gasbag terminal safety cover for protect the pencil terminal of air bag, includes terminal joint portion and housing, and wherein terminal joint portion includes the bayonet socket of tip fixed connection with air bag, and the housing is configured to be formed with the thin wall casing that holds the chamber, and housing and terminal joint portion can encircle the pencil terminal of air bag tip and hold the intracavity and play the guard action, avoid seat foaming extrusion pencil terminal to induce the false alarm. The airbag terminal protection cover is configured into a single part, is simple to assemble, can be installed without additional equipment, fixing pieces or auxiliary materials, and is beneficial to improving production efficiency.

Description

Gasbag terminal safety cover

Technical Field

The utility model belongs to the field of automobile safety, and particularly relates to an airbag terminal protection cover.

Background

With the increasing emphasis of the market on the safety performance of automobiles, the safety airbag has become one of the most common safety equipment on the household automobiles at present. In addition to the main airbag mounted in the steering wheel and the head curtain provided in the roof trim interlayer, more and more vehicles are also equipped with side airbags provided in the seat interior, and some vehicles also start to arrange the front center airbag in the front seat. When the airbag is arranged in the seat, the airbag terminal is easy to foam and squeeze by the seat in the service process, so that poor contact of the wire harness is caused, and false alarm of the airbag alarm lamp is induced. In order to avoid this, some current solutions provide protection means at the end of the balloon. However, in the existing scheme, the protection device is mainly of a split structure, is complex to install, has more parts and is unfavorable for logistics management and on-site production.

Disclosure of Invention

The utility model aims to provide an airbag terminal protection cover which is simple in structure and convenient to install.

According to an embodiment of the present utility model, there is provided an airbag terminal protection cover for protecting a harness terminal of an airbag, the protection cover including a terminal clamping portion and a housing, wherein: the terminal clamping part comprises a bayonet which is used for being fixedly connected with the end part of the gas generator of the safety air bag; the housing is configured as a thin-walled shell forming a receiving cavity, the housing is connected with the terminal clamping portion, and when the terminal clamping portion is fixedly connected to the end of the gas generator, the housing and the terminal clamping portion encircle the wire harness terminal in the receiving cavity.

The terminal clamping part is connected with the housing, so that the airbag terminal protection cover is used as a single part for on-line assembly, an additional connecting piece is not required to be prepared, the assembly operation is simple, the assembly flow is effectively simplified, the workload of logistics preparation is reduced, and the optimization of the material storage space at the edge of the production line is facilitated.

Further, the bayonet is clamped with the end part of the gas generator in an interference fit mode. Through the direct joint of interference fit's form, need not extra mounting and junction device, easy operation is convenient for assemble.

Further, the inner wall of the bayonet is provided with a plurality of raised ridges. The raised edge part is favorable for increasing the friction force between the bayonet and the end part of the safety airbag, so that the installation is firmer.

Preferably, the housing is movably connected to the terminal clamping portion, and the housing is openable and closable around a connection position. The openable and closable housing is convenient for wiring operation and can provide sealing protection for the wire harness terminal better.

Further, the terminal clamping portion is connected with the housing through an elastic arm. The elastic arm is used for connecting the terminal clamping part and the housing, so that the structure is simple and the operation is convenient.

Further, the terminal clamping part, the elastic arm and the housing are configured as an integrally formed plastic piece. The integrally formed plastic piece has simple manufacturing process and is beneficial to reducing the cost.

Further, a clamping structure is arranged on the butt joint end surface of the housing and the terminal clamping part so as to allow the housing and the terminal clamping part to keep a butt joint state. The clamping device is used for maintaining the closed state of the housing, and the housing is prevented from being opened to enable the air bag wire harness terminal to be pressed in the assembly and use process.

Further, the clamping structure is configured as a boss and a groove which are matched with each other. The boss and the groove structure can be mutually clamped together, and the involution state of the housing and the terminal clamping part can be simply and conveniently maintained.

Further, the airbag terminal protection cover includes a projection projecting in a radial direction for accommodating a part of the wire harness. The bulge can protect the wire harness led out by the safety airbag from being extruded, and the stress of the airbag wire harness terminal is reduced.

Optionally, a wire harness outlet is formed in one side of the housing. The harness outlet is used for leading out the safety airbag harness, so that the direct friction of the housing or the shearing of the harness insulating sheath is avoided.

Optionally, the housing and the terminal clamping part are configured into a fixed integrated structure, and the accommodating cavity is configured into a semi-closed cavity, so that the outer contour of the wire harness terminal does not exceed the range of the housing in the axial direction and the radial direction of the air bag generator. The wire harness terminal protection cover of the fixed integral type is simpler in structure, lower in cost and applicable to the safety airbag with small wire harness terminal.

Further, the housing is configured to have a circular or elliptical cross section coaxial with the terminal engaging portion. The rounded or oval configuration is advantageous in preventing the airbag terminal shield from being pressed to rotate.

Further, the outer contour edge of the airbag terminal protection cover is provided with a rounded corner. The rounded corners at the edges of the outer contours are beneficial to reducing the abrasion of the air bag terminal protection cover to the foaming of the seat and improving the safety of passengers after the air bag is exploded.

Drawings

FIG. 1a is a schematic view of an airbag and an airbag terminal protection cover in an open state according to an embodiment;

FIG. 1b is a schematic view of an airbag terminal shield in a closed position and an airbag inflator according to an embodiment;

FIG. 2 is a schematic view showing an open state of the airbag terminal protection cover according to an embodiment;

FIG. 3a is a schematic view of a bayonet structure of an airbag terminal protection cover according to an embodiment;

FIG. 3b is a schematic view of a bayonet structure of a protective cover for an air bag terminal according to another embodiment;

FIG. 4a is a schematic view of an airbag inflator and an airbag terminal shield in yet another embodiment;

fig. 4b is a schematic view of a protective cover for an airbag terminal in another embodiment.

Meaning of reference numerals:

01-an airbag terminal shield; 11-a housing; 12-terminal clamping parts; 13-an elastic arm; 14-bayonet; 15-a projection; 16-grooves; 17-boss; 18-a harness outlet; 19-edge portions; 02-an airbag; 21-a gas generator; 22-harness terminals; 23-fixing bolts; 03-wire harness; 04-accommodation chamber.

The above drawings are for the purpose of describing in detail the technical solution of the present utility model so that those skilled in the art can understand the technical concept of the present utility model, and are not intended to limit the present utility model. For simplicity of illustration, the above figures show only schematically the structures related to the technical features of the present utility model, and not all the details and the complete structures are drawn strictly to the actual scale.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings by means of specific examples.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment herein. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments limited to the same embodiment. Those skilled in the art will appreciate that embodiments herein may be combined with other embodiments without structural conflict.

In the description herein, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be movably connected, fixedly connected, or integrally formed. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those skilled in the art according to specific circumstances.

In the description herein, terms such as "upper," "lower," "left," "right," "transverse," "longitudinal," "height," "length," "width," and the like that indicate an azimuth or positional relationship are intended to accurately describe the embodiments and simplify the description, and do not limit the details or structures involved to having to have a particular azimuth, mount or operate in a particular azimuth, and are not to be construed as limiting embodiments herein.

In the description herein, the meaning of "plurality" is at least two.

The safety airbag is one of the most important safety parts of a vehicle, and in order to ensure that the safety airbag can be normally opened in the event of collision and is not accidentally detonated in the normal driving process, a driving computer needs to detect the electric signal of the safety airbag, and when the abnormal detection signal triggers the illumination of an airbag alarm lamp on an instrument to alarm. However, in the long-term use of the side airbag mounted in the seat, the wire harness terminal of the airbag is likely to be in contact failure by the extrusion of the seat foaming, and a false alarm is induced to affect the normal use of the vehicle. Accordingly, some current technology employs installing an airbag terminal harness protection device at the end of the airbag to avoid foaming to directly squeeze the harness terminal position. For example, in some prior art, the airbag harness terminals are foamed off the seat by attaching a metal protector to the inflator end of the side airbag and the metal protector is clipped to the airbag body, i.e., the inflator, by a clip. The installation process needs to be equipped with special installation equipment, the protection piece and the clamp are independent parts respectively, the assembly process is complicated, and an additional material rack is required to be occupied at the side of the production line, so that the improvement of the production efficiency is not facilitated.

In order to solve the above-described problems, an embodiment of the present utility model provides an airbag terminal protection cover 01 as shown in fig. 1a, the protection cover 01 including a housing 11 and a terminal clamping portion 12, wherein the housing 11 is used for protecting a harness terminal 22 of an airbag 02, and the terminal clamping portion 12 is fixedly connected with a gas generator 21 of the columnar airbag 02 as shown in fig. 1 b. In a preferred embodiment, the protective cover 01 is configured as an integrally formed part made of plastic. As shown in fig. 2, the bottom end of the terminal clamping part 12 is an annular bayonet 14, and the bayonet 14 is in interference fit with the end of the gas generator 21 of the airbag 02, so as to fix the terminal clamping part 12 on the airbag body 02; the terminal clamping portion 12 is provided with an elastic arm 13 on the tip side, and the housing 11 is connected to the terminal clamping portion 2 by the elastic arm 13 and can be opened and closed around the connection position. The housing 11 is provided in a thin-walled structure and is formed with a receiving chamber 04. In the assembly, first, as shown in fig. 2, the cover 11 is opened, the terminal locking portion 12 is fixedly attached to the end of the gas generator 21 to which the harness terminal 22 is attached, the harness 03 and the harness terminal 22 are connected, and then the cover 11 is rotated to be in a state of being engaged with the terminal locking portion 12, and the cover 11 and the terminal locking portion 12 together encircle the harness terminal 22 in the housing cavity 04. When the cover 11 is opposed to the terminal clamping portion 12, as shown in fig. 1b, the end of the gas generator 21 is enclosed inside the housing cavity 04 together with the harness terminal 22, and the cover 11 isolates the end of the gas generator 21 from the outside. When the airbag 02 is mounted on a seat frame (not shown) by the fixing bolts 23, the airbag terminal protection cover 01 can protect the harness terminal 22 from being pressed by a seat foam (not shown), thereby avoiding poor contact between the harness 03 and the harness terminal 22 during long-term use and reducing the risk of false alarm.

In some embodiments, the end of the gas generator 21 and the inner wall of the bayonet 14 may be provided with mutually matching screw threads, so that the terminal clamping portion 12 is mounted on the airbag body 02 in a threaded connection manner. In some embodiments, the elastic arm 13 may be replaced by a hinge structure, such as a hinge, etc., and the housing 11 and the terminal clamping portion 12 may be configured as two sub-parts manufactured separately. In some embodiments, some or all of the housing 11 and/or the terminal clamping portion 12 may also be made of a metallic material or a ceramic material, a composite material, or the like.

In a preferred embodiment, as shown in fig. 3a, the inner wall surface of the bayonet 14 is provided with a plurality of raised ridges 19, and the toothed ridges 19 can increase friction between the bayonet 14 and the airbag body 02, so that the protective cover 01 can be mounted more firmly. In another preferred embodiment, as shown in fig. 3b, the ribs 19 are configured as rectangular or wedge-shaped bosses, which also have the effect of increasing friction.

In a preferred embodiment, as shown in fig. 1b and 2, one side of the housing 11 is provided with a harness outlet 18, through which harness 03 connected with a permissible harness terminal 22 is led out through the harness outlet 18, avoiding friction or shearing of the insulating sheath of the harness 03 by the housing. In some embodiments, the harness outlet 18 may be replaced by a soft rubber pad that can provide a space for the harness 03 to pass through by being elastically deformed.

In the preferred embodiment, the upper end surface of the terminal clamping portion 12 is provided with a protruding portion 15 protruding in the radial direction, and the housing 11 also protrudes in the same direction to receive part of the harness 03 into the interior of the receiving chamber 04, so that the harness 03 contacts the harness terminal of the airbag body 02 at a position where the seat foams away from the harness terminal, and the stress of the harness terminal is reduced.

In the preferred embodiment, the protruding portion 15 is provided with a groove 16, the housing 11 is provided with a boss 17 at a corresponding position, the groove 16 and the boss 17 are mutually matched, and when the housing 11 is opposite to the terminal clamping portion 12, the boss 17 is inserted into the groove 16 and clamped together, so that the housing 11 is kept in a state of being matched with the terminal clamping portion 12. In some embodiments, the grooves 16 and the bosses 17 may be replaced by other fixing structures such as fixing buckles.

In an alternative embodiment, the outer contoured edge of the protective cover 01 is provided with rounded corners to reduce wear on the seat foam, while at the same time reducing the risk of injury to the occupant upon detonation of the airbag.

In still another embodiment of the present utility model, there is provided an airbag terminal housing 01 as shown in fig. 4a and 4b, wherein a terminal engaging portion 12 of the airbag terminal housing 01 and a cover 11 are configured as a fixedly connected integrated structure. The housing cavity 04 formed by the housing 11 is in a semi-closed structure, and a wire harness outlet 18 is formed in the top and one side of the housing 11. After the terminal clamping portion 12 is clamped to the end of the gas generator 21, the wire harness 03 is connected to the harness terminal 22 through the harness outlet 18. In the mounted state, the harness terminal 22 does not exceed the range of the housing 11 in the axial direction and the radial direction of the airbag generator 21,

specifically, the virtual curved surface formed by extending along the surface of the housing 11 at the harness outlet 18 can entirely cover the harness terminal 22 inside, thereby achieving the effect of protecting the harness terminal from being pressed by a seat foam (not shown). In the preferred embodiment, the housing 11 is configured as a housing structure having a circular or oval cross-sectional shape coaxially disposed with the terminal engaging portion 12, and the circular or oval shape thereof can reduce the torque received by the housing 11 when pressed, and prevent the airbag terminal protection cover 01 from being pressed and rotated. This embodiment is particularly suitable for a small-sized harness terminal 22 technical scheme, and is preferable in that the harness terminal 22 does not protrude significantly in the radial direction of the gas generator 21 after being mounted. The airbag terminal protection cover 01 provided by the embodiment has the advantages of simple structure, convenience in installation and low cost.

The gasbag terminal protection cover provided in the embodiment is simple in structure, the whole design is a single part, the installation process is convenient and quick, no additional fixing piece or consumable is needed, the installation can be completed manually without special equipment, the assembly flow is simplified, the logistics spare parts are reduced, and the production line production efficiency is improved.

The above-described embodiments are intended to explain the present utility model in further detail with reference to the figures so that those skilled in the art can understand the technical concept of the present utility model. The structural optimization or equivalent replacement of the parts involved, and the implementation of the different embodiments without structural and principle conflicts, all fall within the scope of protection of the present utility model.

Claims

1. An airbag terminal protection cover for protecting a harness terminal of an airbag, comprising a terminal clamping part and a housing, wherein:

the terminal clamping part comprises a bayonet which is used for being fixedly connected with the end part of the gas generator of the safety air bag;

the housing is configured as a thin-walled shell forming a receiving cavity, the housing is connected with the terminal clamping portion, and when the terminal clamping portion is fixedly connected to the end of the gas generator, the housing and the terminal clamping portion encircle the wire harness terminal in the receiving cavity.

2. The airbag terminal protection cover of claim 1, wherein the bayonet is snapped into engagement with an end of the gas generator in an interference fit.

3. The airbag terminal protection cover according to claim 2, wherein an inner wall of the bayonet is provided with a plurality of raised ridges.

4. The airbag terminal protection cover according to claim 1 or 2, characterized in that the housing is movably connected to the terminal clamping portion, the housing being capable of opening and closing movement about a connection position.

5. The airbag terminal protection cover of claim 4, wherein the terminal clamping portion is connected to the housing by a resilient arm.

6. The airbag terminal shield of claim 4, wherein the terminal clamping portion, the spring arm and the housing are configured as an integrally molded plastic piece.

7. The airbag terminal protection cover according to claim 4, wherein a locking structure is provided on a locking end face of the housing and the terminal locking portion to allow the housing and the terminal locking portion to be kept locked.

8. The airbag terminal shield of claim 7, wherein the engagement structure is configured as a mating boss and groove.

9. The airbag terminal protection cover according to claim 4, wherein the airbag terminal protection cover includes a projection projecting in a radial direction for accommodating a part of the wire harness.

10. The airbag terminal protection cover according to claim 1 or 2, characterized in that a harness outlet is provided on one side of the housing.

11. The airbag terminal protection cover according to claim 10, wherein the housing and terminal clamping portion are configured in a fixed connection structure, and the housing cavity is configured as a semi-closed cavity, so that an outer contour of the harness terminal does not exceed a range of the housing in an axial direction and a radial direction of the gas generator.

12. The airbag terminal protection cover according to claim 11, wherein the housing is configured in a structure having a circular or elliptical cross section coaxial with the terminal engagement portion.

13. The airbag terminal protection cover according to claim 1 or 2, characterized in that an outer contour edge of the airbag terminal protection cover is provided as a rounded corner.