Gas filter for automobile safety air bag

Abstract

The utility model relates to the technical field of automobile safety air bags, in particular to a gas filter for an automobile safety air bag, which comprises a filter screen arranged on the inner side of an inner casing, a groove arranged on the inner surface of the inner casing, and an anti-falling mounting component arranged on the inner surface of the groove. A reset spring is fixedly connected to the bottom surface of the mounting sleeve, one end of the reset spring is fixedly connected with a sliding plate, an insertion column is slidably mounted on the upper surface of the sliding plate, a connecting plate is fixedly mounted at the end, away from the sliding plate, of the insertion column, two clamping columns are fixedly mounted on the side wall of the insertion column, and two clamping grooves are formed in the side surface of the mounting sleeve. The air bag filter has the beneficial effects that the filter screen can be ensured not to shift or fall off in a high-pressure environment in which the air bag is quickly expanded, so that solid particles and harmful substances in the air bag can be continuously and effectively filtered, unsmooth local airflow or abnormal pressure accumulation caused by shift of the filter screen is avoided, and the filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive airbags, specifically a gas filter for automotive airbags. Background Technology

[0002] The electronic airbag system is a passive safety protection system (see automotive safety performance). It mainly consists of airbag sensors, anti-collision airbags, and electronic control devices. The driver-side anti-collision airbag is located in the steering wheel, while the passenger-side anti-collision airbag is generally mounted on the dashboard. The airbag sensors are installed on the left, right, and center of the driver's compartment partition. The central airbag sensor and airbag system are installed together with the electronic control device. The airbag assembly mainly consists of the airbag, gas generator, and igniter.

[0003] In the event of an accident, existing cars will deploy airbags to protect themselves. The airbag explosion generates high-pressure gas to inflate the airbag. Some residues produced by the explosion are filtered by a gas filter to prevent solid particles or metal fragments from entering the airbag and causing injury to passengers. The filter can effectively intercept these substances.

[0004] However, in the instant of a vehicle collision, the airbag needs to deploy quickly. If the filter screen falls off, unfiltered gas may enter the airbag directly, which may not only damage the airbag material, but may also cause the airbag to fail to inflate properly, thus failing to provide good protection for the passenger. Utility Model Content

[0005] The purpose of this invention is to provide a gas filter for automotive airbags, in order to solve the problem mentioned in the background art that, at the moment of a vehicle collision, the airbag needs to deploy quickly. If the filter screen falls off, unfiltered gas may directly enter the airbag, which may not only damage the airbag material but also cause the airbag to fail to inflate properly, thus failing to provide adequate protection for passengers.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas filter for automotive airbags, comprising:

[0007] The inner shell has a filter screen on its inner side and a groove on its inner surface. The inner surface of the groove is provided with an anti-drop-off mounting component, which includes a mounting sleeve. A return spring is fixedly connected to the bottom surface of the mounting sleeve, and a sliding plate is fixedly connected to one end of the return spring.

[0008] The upper surface of the sliding plate is slidably mounted with a pin, and a connecting plate is fixedly mounted at the end of the pin away from the sliding plate. Two locking pins are fixedly mounted on the side wall of the pin, and two locking grooves are opened on the side surface of the mounting sleeve.

[0009] Preferably, the mounting sleeve is fixedly installed in the groove, and the sliding plate is slidably connected to the mounting sleeve by a return spring.

[0010] Preferably, the inner side of the connecting plate is a semi-circular structure that is in close contact with the filter screen, the locking post is engaged with the locking groove, and the insertion post is slidably connected to the inner surface of the mounting sleeve.

[0011] Preferably, a fixing component is fixedly installed on the lower surface of the inner shell. The fixing component includes a mounting flange, a threaded hole is provided at the edge of the upper surface of the mounting flange, and a fastening bolt is threaded onto the inner surface of the threaded hole.

[0012] Preferably, an igniter is fixedly installed at the connection between the mounting flange and the inner shell, and the inner surface of the igniter is provided with a gas generating agent.

[0013] Preferably, an outer shell is fixedly mounted on the upper surface of the mounting flange, and the outer shell is fitted onto the outer surface of the inner shell.

[0014] Preferably, a short-circuit clamp is fixedly installed on the upper surface of the outer casing, and several air vents are provided on the side surface of the outer casing.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model proposes a gas filter for automotive airbags;

[0017] By incorporating an anti-detachment installation component, during filter installation, the filter is tightly fitted to the inner side of the inner housing. The insertion post is then inserted into the inner surface of the mounting sleeve. During insertion, the insertion post presses down on the sliding plate via a return spring. As the insertion process continues, the insertion post rotates. When the inner wall of the connecting plate is fully in contact with the filter, the locking pin on the side wall of the insertion post engages with the locking groove on the outer wall of the mounting sleeve, thus securing the filter. This ensures that the filter will not shift or detach under the high-pressure environment of rapid airbag expansion, thereby continuously and effectively filtering solid particles and harmful substances. It also prevents localized airflow obstruction or abnormal pressure buildup caused by filter displacement, improving the filtration effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the filter screen anti-detachment installation component of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the filter screen installation structure of this utility model;

[0022] Figure 5 For the present utility model Figure 4 Enlarged view of section B in the middle.

[0023] In the diagram: 1. Mounting flange; 2. Fastening bolts; 3. Outer shell; 4. Short-circuit clamp; 5. Vent hole; 6. Inner shell; 7. Filter screen; 8. Groove; 9. Ignition device; 10. Mounting sleeve; 11. Return spring; 12. Sliding plate; 13. Insert post; 14. Locking post; 15. Locking groove; 16. Connecting plate; 17. Threaded hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Please see Figures 1-5 The present invention provides the following two preferred embodiments: a gas filter for automotive airbags;

[0026] Example 1:

[0027] To prevent the filter screen 7 from shifting or falling off under the high pressure of rapid airbag expansion, a filter screen 7 is installed inside the inner shell 6. A groove 8 is formed on the inner surface of the inner shell 6, and an anti-fall-off mounting assembly is installed on the inner surface of the groove 8. The anti-fall-off mounting assembly includes: a mounting sleeve 10, a return spring 11 fixedly connected to the bottom surface of the mounting sleeve 10, a sliding plate 12 fixedly connected to one end of the return spring 11, a pin 13 slidably mounted on the upper surface of the sliding plate 12, a connecting plate 16 fixedly mounted on the end of the pin 13 away from the sliding plate 12, two locking pins 14 fixedly mounted on the side wall of the pin 13, and two locking grooves 15 formed on the side surface of the mounting sleeve 10. The mounting sleeve 10 is fixedly installed with the groove 8, and the sliding plate 12 is slidably connected to the mounting sleeve 10 via the return spring 11. The inner side of the connecting plate 16 has a semi-circular structure tightly attached to the filter screen 7. The locking post 14 engages with the locking groove 15, and the insertion post 13 slides with the inner surface of the mounting sleeve 10. When installing the filter screen 7, the filter screen 7 is pressed tightly against the inner side of the inner housing 6, and the insertion post 13 is inserted into the inner surface of the mounting sleeve 10. During the insertion process, the insertion post 13 presses down on the sliding plate 12 through the return spring 11. During the pressing process, the insertion post 13 rotates. When the inner wall of the connecting plate 16 is in complete contact with the filter screen 7, the locking post 14 on the side wall of the insertion post 13 engages with the locking groove 15 on the outer wall of the mounting sleeve 10, thereby achieving the installation and clamping of the filter screen 7. This ensures that the filter screen 7 will not shift or fall off under the high-pressure environment of rapid expansion of the airbag, thus continuously and effectively filtering solid particles and harmful substances, avoiding local airflow obstruction or abnormal pressure accumulation caused by the shifting of the filter screen 7, and improving the filtration effect.

[0028] Example 2:

[0029] Based on Embodiment 1, to facilitate the inflation of the car airbag, an igniter 9 is fixedly installed at the connection between the mounting flange 1 and the inner shell 6. The inner surface of the igniter 9 is provided with a gas generating agent. An outer shell 3 is fixedly installed on the upper surface of the mounting flange 1. The outer shell 3 is fitted onto the outer surface of the inner shell 6. A short-circuit clamp 4 is fixedly installed on the upper surface of the outer shell 3. Several air vents 5 are opened on the side surface of the outer shell 3. When the vehicle is involved in a collision, the igniter 9 ignites the gas generating agent in the inner shell 6. The large amount of gas generated is filtered through the filter screen 7, and then the airbag is inflated through the several air vents 5 opened on the side surface of the outer shell 3 to protect the driver.

[0030] Working principle: To prevent the filter screen 7 from shifting or falling off under the high pressure of rapid airbag expansion, during installation, the filter screen 7 is tightly attached to the inner side of the inner housing 6, and the insertion post 13 is inserted into the inner surface of the mounting sleeve 10. During the insertion process, the insertion post 13 presses down on the sliding plate 12 through the return spring 11. During the pressing process, the insertion post 13 rotates. When the inner wall of the connecting plate 16 is in complete contact with the filter screen 7, the locking post 14 on the side wall of the insertion post 13 engages with the locking groove 15 on the outer wall of the mounting sleeve 10, thereby securing the filter screen 7. This ensures that the filter screen 7 will not shift or fall off under the high pressure of rapid airbag expansion, thus continuously and effectively filtering solid particles and harmful substances, avoiding local airflow obstruction or abnormal pressure accumulation caused by the shifting of the filter screen 7, and improving the filtration effect.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas filter for use in an automotive airbag, characterized by: Include: The inner side of the inner shell (6) is provided with a filter screen (7), the inner surface of the inner shell (6) is provided with a groove (8), the inner surface of the groove (8) is provided with an anti-falling mounting assembly, the anti-falling mounting assembly comprises: a mounting sleeve (10), the bottom surface of the mounting sleeve (10) is fixedly connected with a return spring (11), one end of the return spring (11) is fixedly connected with a sliding plate (12); The upper surface of the sliding plate (12) is slidably connected with a plug column (13), the end of the plug column (13) away from the sliding plate (12) is fixedly connected with a connecting plate (16), the side wall of the plug column (13) is fixedly connected with two clamping columns (14), the side surface of the mounting sleeve (10) is provided with two clamping grooves (15).

2. A gas filter for use in an automotive air bag according to claim 1, wherein: The mounting sleeve (10) and the groove (8) are fixedly installed, and the sliding plate (12) is slidably connected with the mounting sleeve (10) through the return spring (11).

3. The gas filter for use in an automotive air bag according to claim 1, wherein: The inner side of the connecting plate (16) is a semicircular structure close to the filter screen (7), the clamping column (14) is connected with the clamping groove (15), and the plug column (13) is slidably connected with the inner surface of the mounting sleeve (10).

4. The gas filter for use in an automotive air bag according to claim 1, wherein: The lower surface of the inner shell (6) is fixedly connected with a fixing assembly, the fixing assembly comprises: a mounting flange (1), a threaded hole (17) is formed in the edge of the upper surface of the mounting flange (1), and a fastening bolt (2) is screwed in the inner surface of the threaded hole (17).

5. A gas filter for use in an automotive air bag according to claim 4, wherein: The mounting flange (1) and the inner shell (6) are fixedly connected with an igniter (9), and the inner surface of the igniter (9) is provided with a gas generating agent.

6. A gas filter for use in an automotive air bag according to claim 4, wherein: The upper surface of the mounting flange (1) is fixedly connected with an outer shell (3), and the outer shell (3) is sleeved on the outer surface of the inner shell (6).

7. A gas filter for use in an automotive airbag according to claim 6, wherein: The upper surface of the outer shell (3) is fixedly connected with a short circuit clamp (4), and the side surface of the outer shell (3) is provided with a plurality of air outlets (5).

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