CN217546390U - Controller for safety air bag - Google Patents

Abstract

The present application provides a controller for an airbag. The controller includes: a housing enclosing a cavity therein and provided with one or more mounting angles on an outer wall; a first circuit board positioned within the cavity; a second circuit board positioned within the cavity proximate to one of the mounting corners; wherein the second circuit board includes an acceleration sensor and an inertial sensor. The controller for the safety airbag has the advantages of simple structure, convenience in implementation, convenience in manufacturing and the like.

Description

Controller for safety air bag

Technical Field

The application relates to the field of automobile controller structures. More particularly, the present application relates to an airbag controller that aims to provide improved resonance performance.

Background

Controllers for vehicle airbags are usually provided with a circuit board. Sensors and other electronic components are typically integrated on existing circuit boards. In particular, the controller may have one or more capacitors. The dimensional characteristics of the circuit board and the vibration effects of large electronic devices can result in certain natural frequencies. For example, the natural frequency of existing circuit boards may be around 500 Hz. If the vibration frequency of the controller is close to the natural criticality, the acceleration signal will be amplified.

SUMMERY OF THE UTILITY MODEL

An object of an aspect of the present application is to provide a controller for an airbag that reduces difficulty in manufacturing and assembling while improving resonance performance.

The purpose of the application is realized by the following technical scheme:

a controller for an airbag, comprising:

a housing enclosing a cavity therein and provided with one or more mounting angles on an outer wall;

a first circuit board positioned within the cavity;

a second circuit board positioned within the cavity proximate to one of the mounting corners;

wherein the second circuit board includes an acceleration sensor and an inertial sensor.

In the above controller for an airbag, optionally, the housing is configured to have a rectangular cross section, and the three mounting corners are provided at three corners of the rectangular cross section of the housing.

In the above controller for an airbag, optionally, the second circuit board is positioned in a triangular region formed by connecting lines of three corners at which the three mounting corners are located.

In the above controller for an airbag, optionally, a plurality of terminals are included on an inner wall of the housing, and the second circuit board is snap-fitted to the terminals by press-fitting and fixed in place, wherein the first circuit board and the second circuit board are electrically connected by one or more of the following: flying or jumper wires, adjacent terminals.

In the above controller for an airbag, optionally, the terminal is configured integrally with the housing.

In the above controller for an airbag, optionally, the first circuit board is also snap-fitted to the terminal and fixed in place.

In the above controller for an airbag, optionally, a cover is further included, the cover being snapped to the housing by interference fit and covering the cavity.

In the above controller for an airbag, optionally, the second circuit board is configured to be rectangular, the first circuit board and the second circuit board are configured to be complementary in shape, and an area of the second circuit board is smaller than an area of the first circuit board, the first circuit board and the second circuit board being positioned on the same plane.

In the above controller for an airbag, optionally, the second circuit board is dimensioned to have a resonance frequency of more than 5000Hz.

In the above controller for an airbag, optionally, the controller further includes:

a capacitor disposed within the cavity and spaced apart from the second circuit board; and

one or more electrical interfaces disposed on the housing.

Drawings

The present application will be described in further detail below with reference to the attached drawings and preferred embodiments. Those skilled in the art will appreciate that the drawings are designed solely for the purposes of illustrating preferred embodiments and that, accordingly, should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the depicted objects and may contain exaggerated displays. The figures are also not necessarily drawn to scale.

Fig. 1 is a perspective view of an embodiment of a controller for an airbag according to the present application.

Fig. 2 is an exploded view of the embodiment of fig. 1 from another perspective.

Fig. 3 is a partial cross-sectional view of the embodiment shown in fig. 1.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the terms top, bottom, upward, downward, and the like as used herein are defined with respect to the orientation in the drawings. These orientations are relative concepts and will therefore vary depending on the position and state in which they are located. These and other directional terms should not be construed as limiting.

Furthermore, it should also be noted that for any single technical feature described or implicit in the embodiments herein or shown or implicit in the drawings, these technical features (or their equivalents) can be continuously combined to obtain other embodiments not directly mentioned herein.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

Fig. 1 is a perspective view of an embodiment of a controller for an airbag according to the present application. The controller may be configured to have a substantially cubic shape, in other words, the cross-section of the controller may be rectangular, and the housing 100 may be configured to have a substantially rectangular cross-section. One or more mounting corners 120 are provided on the outer wall of the housing 100. The mounting corners 120 may be positioned at the corners of the rectangular cross-section of the housing 100 and serve to secure the entire controller. In the embodiment shown in fig. 1, three corners of the cross section of the housing 100 are provided with mounting corners 120, respectively. Bolts may be provided at the mounting corners 120 to secure the entire controller to a structure not shown. Vibrations from the vehicle body may also be transmitted to the controller through the bolts and the mounting angles 120. Additionally, the housing 100 may also include one or more electrical interfaces 600 to provide electrical connectivity to the controller. In the embodiment shown in fig. 1, two electrical interfaces 600 may be provided on the housing 100.

Fig. 2 is an exploded view of the embodiment shown in fig. 1 from another perspective, and fig. 3 is a partial cross-sectional view of the embodiment shown in fig. 1. In the embodiment of fig. 2, the controller shown in fig. 1 is flipped over and the various components are shown in exploded view.

The housing 100 may define a cavity 110 therein. A plurality of terminals 130 may be disposed on an inner wall of the housing 100. The terminal 130 may be configured to be manufactured integrally with the housing 100. The cavity 110 may be closed by a cover 400. In one embodiment, the cover 400 may be snapped to the housing 100 with an interference fit and completely enclose the cavity 110. In one embodiment, the cover 400 may be configured to have a generally rectangular profile.

Various electronic devices may be disposed within the cavity 110 including, but not limited to, a first circuit board 200, a second circuit board 300, a capacitor 500, and the like. In one embodiment, as shown in fig. 3, first circuit board 200 and second circuit board 300 may be disposed substantially on the same plane and collectively occupy the entire cross-section of chamber 100. In one embodiment, the second circuit board 300 may be configured to be substantially rectangular. In another embodiment, the second circuit board may be configured to have a triangular, oval, circular, prismatic, trapezoidal, etc. shape. In one embodiment, the shapes of first circuit board 200 and second circuit board 300 may be configured to be complementary and just together form a rectangular shape. Further, the second circuit board 300 may be spaced apart from the capacitor 500. That is, the first circuit board 200 may be disposed adjacent to the capacitor 500, and the second circuit board 300 and the capacitor 500 are not directly adjacent.

The second circuit board 300 may have disposed thereon an acceleration sensor 310, an inertial sensor 320, and/or other electronic components. In one embodiment, second circuit board 300 may be positioned adjacent to one of the mounting corners 120 to enable impacts from the mounting corner 120 to be transferred to second circuit board 300 and sensed as quickly as possible. In one embodiment, the second circuit board 300 is positioned in a triangle formed by the connecting lines between the three corners of the housing 100 where the three mounting corners 120 are located. This enables an impact from any one of the mounting corners 120 to be transmitted to the second circuit board 300 and sensed as soon as possible. The size of the second circuit board 300 may be set smaller than the size of the first circuit board 200 and smaller than the cross-sectional size of the case 100. With the above arrangement, the resonance frequency of the second circuit board 300 can be significantly increased. In one embodiment, the resonant frequency of the second circuit board 300 may be greater than 5000Hz. In another embodiment, the resonant frequency of the second circuit board may be between 5000-6000 Hz. The relatively high resonant frequency is difficult to reach in actual vehicle operation, thus improving the safety and reliability of the overall controller.

The second circuit board 300 may be snap-fit to the plurality of terminals 130 and secured in place by press-fitting. In one embodiment, the end of the terminal 130 may be configured in a shape suitable for press-fitting. In one embodiment, the second circuit board 300 may be provided with holes adapted for press-fitting. In one embodiment, the periphery of the second circuit board 300 may be provided with a plurality of holes. Similarly, first circuit board 200 may be held in place in a similar manner. The first circuit board 200 and the second circuit board 300 can be assembled by pressing, which improves the mounting efficiency and the reliability.

An electrical connection may be established between first circuit board 200 and second circuit board 300. For example, the terminals 130 may be made of a conductive material or a metal, and at least two terminals 130 near an interface line of the first and second circuit boards 200 and 300 may be integrally connected with each other. The portions of the at least two terminals 130 contacting the first circuit board 200 and the second circuit board 300 may be electrically connected by spot welding, and the electrical connection between the first circuit board 200 and the second circuit board 300 is formed by the at least two terminals 130. In one embodiment, first circuit board 200 and second circuit board 300 may be electrically connected by flying or jumper wires.

The controller for the safety airbag has the advantages of simple structure, reliability in operation, easiness in implementation and the like. By adopting the technical scheme of the application, the operation performance of the controller is improved, and the reliability is improved.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the claims and encompasses other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of protection defined by the claims of this application, provided that they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims (10)

1. A controller for an airbag, comprising:

a housing (100) enclosing a cavity (110) therein and provided with one or more mounting corners (120) on an outer wall;

a first circuit board (200) positioned within the cavity (110);

a second circuit board (300) positioned within the cavity (110) proximate to one of the mounting corners (120);

wherein the second circuit board (300) comprises an acceleration sensor (310) and an inertial sensor (320).

2. The controller for an airbag according to claim 1, wherein the case (100) is configured to have a rectangular cross section, and three mounting corners (120) are provided at three corners of the rectangular cross section of the case (100).

3. The controller for an airbag according to claim 2, wherein the second circuit board (300) is positioned in a triangular region formed by a line connecting three corners where three mounting corners (120) are located.

4. The controller for an airbag according to claim 1, wherein the housing (100) includes a plurality of terminals (130) on an inner wall thereof, and the second circuit board (300) is snapped to the terminals (130) by press-fitting and fixed in place.

5. The controller for an airbag according to claim 4, wherein the terminal (130) is configured integrally with the housing (100).

6. The controller for an airbag according to claim 4, wherein the first circuit board (200) is also snapped to the terminal (130) and fixed in place, wherein an electrical connection is formed between the first circuit board (200) and the second circuit board (300) by one or more of: a flying or jumper wire, adjacent the terminal (130).

7. The controller for an airbag according to claim 1, further comprising a cover (400), the cover (400) being snapped to the housing (100) by interference fit and covering the cavity (110).

8. The controller for an airbag according to any one of claims 1 to 7, wherein the second circuit board (300) is configured to be rectangular, the first circuit board (200) and the second circuit board (300) are configured to be complementary in shape, and an area of the second circuit board (300) is smaller than an area of the first circuit board (200), the first circuit board (200) and the second circuit board (300) being positioned on the same plane.

9. The controller for an airbag according to claim 8, wherein the second circuit board (300) is dimensioned to have a resonant frequency greater than 5000Hz.

10. The controller for an airbag according to any one of claims 1 to 7, characterized by further comprising:

a capacitor (500) disposed within the cavity (110) and spaced apart from the second circuit board (300); and

one or more electrical interfaces (600) disposed on the housing (100).

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