Injection molding igniter with grounding function

Abstract

The utility model discloses an injection molding igniter with a grounding function, which relates to the related technical field of safety air bag igniters, and comprises an ignition piece, an injection molding body, a metal insert, a grounding elastic piece, a short circuit clamp and a generator shell, the upper end of the ignition piece penetrates through the lower end face of the injection molding body and then is arranged above the injection molding body, the metal insert surrounds the outer side face of the injection molding body, the inner side face of the metal insert is connected with the outer side face of the injection molding body in a clamped mode, the outer side face of the metal insert makes contact with the inner wall of the generator shell, and the grounding elastic piece is arranged in the injection molding body. The outer end of the grounding elastic piece penetrates through the injection molding body and then makes contact with the inner wall of the generator shell, the short circuit clamp penetrates through the upper end face of the injection molding body and then is arranged in the injection molding body, and the outer side face of the short circuit clamp makes contact with the inner side face of the grounding elastic piece. The beneficial effects of the utility model are that the insulating property is improved, and the grounding release of static electricity can be realized through grounding of the wire harness with the grounding function at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of airbag igniters, in particular to an injection-molded igniter with a grounding function. Background Art

[0002] The igniter of the airbag is used to quickly inflate the airbag when a vehicle collides to protect the people in the vehicle. The injection-molded igniter is a relatively popular technology on the gas generator at present. Since ordinary nylon has insulation properties, the generator of the injection-molded igniter made of ordinary nylon cannot be directly grounded with a wire harness with a grounding function, which results in the inability to achieve the grounding release of static electricity and there is a risk of the airbag inflating suddenly. Content of the Utility Model

[0003] The utility model aims to overcome the deficiency in the prior art that while improving insulation, it cannot be grounded with a wire harness with a grounding function, and provides an injection-molded igniter with a grounding function that can be grounded with a wire harness with a grounding function to achieve the grounding release of static electricity while improving insulation.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An injection-molded igniter with a grounding function, comprising a firing element, an injection-molded body, a metal insert, a grounding spring piece, a short-circuit clip and a generator housing. The firing element is placed on the lower end face of the injection-molded body, and the upper end of the firing element passes through the lower end face of the injection-molded body and is placed above the injection-molded body. The metal insert surrounds the outer side of the injection-molded body, the inner side of the metal insert is clamped with the outer side of the injection-molded body, the outer side of the metal insert is in contact with the inner wall of the generator housing, the grounding spring piece is placed inside the injection-molded body, the outer end of the grounding spring piece passes through the injection-molded body and is in contact with the inner wall of the generator housing, the short-circuit clip passes through the upper end face of the injection-molded body and is placed inside the injection-molded body, and the outer side of the short-circuit clip is in contact with the inner side of the grounding spring piece.

[0006] During installation, first embed the short-circuit clip inside the injection-molded body to make the outer side of the short-circuit clip in contact with the inner wall of the grounding spring piece, then install the injection-molded body into the generator housing to make the outer side of the metal insert and the outer end of the grounding spring piece both in close contact with the inner wall of the generator housing, and then pass the firing element through the injection-molded body and connect it to the corresponding components. Thus, the conduction from the generator housing to the injection-molded igniter to the short-circuit clip to the wire harness is realized to achieve the grounding release of static electricity, and the purpose of being able to be grounded with a wire harness with a grounding function to achieve the grounding release of static electricity while improving insulation is achieved.

[0007] Preferably, a groove is provided on the upper end surface of the injection molded body. The grounding spring piece and the short - circuit clip are both placed in the groove, and both the grounding spring piece and the short - circuit clip are in contact with the inner side of the groove. A wire harness is provided on the upper end surface of the firing element. The lower end of the wire harness is fixedly connected to the upper end of the firing element. The upper end of the wire harness passes through the injection molded body and the short - circuit clip and is placed above the injection molded body. The outer side surface of the injection molded body is in contact with the inner wall of the generator housing. The groove can fixedly place the short - circuit clip, making the short - circuit clip closely connected to the grounding spring piece. Coupled with the wire harness on the firing element, the circuit is made conductive.

[0008] Preferably, the grounding spring piece includes an annular spring piece and a strip - shaped grounding spring piece. There are several strip - shaped grounding spring pieces and they are evenly distributed on the outer side surface of the annular spring piece. The inner end of the strip - shaped grounding spring piece is fixedly connected to the outer side surface of the annular spring piece. The annular spring piece is placed in the groove, and the outer side surface of the annular spring piece is in contact with the inner side surface of the groove. The lower end of the short - circuit clip is in contact with the inner bottom surface of the groove, and the outer side surface of the short - circuit clip is in contact with the inner side surface of the annular spring piece. The outer end of the strip - shaped grounding spring piece passes through the inner side wall of the groove and is placed on the outer side surface of the injection molded body. The strip - shaped grounding spring piece is in contact with the inner wall of the generator housing. The annular spring piece is responsible for maximizing the contact connection with the short - circuit clip, and the strip - shaped grounding spring piece facilitates passing through the injection molded body and being placed outside.

[0009] Preferably, the strip - shaped grounding spring piece has a fold angle and the outer end of the strip - shaped grounding spring piece is upturned. The outer diameter of the strip - shaped grounding spring piece is slightly larger than the inner diameter of the generator housing. The outer diameter of the strip - shaped grounding spring piece being slightly larger than the inner diameter of the generator housing facilitates the strip - shaped grounding spring piece to be in close contact with the inner wall of the generator housing during installation, and the installation is more stable.

[0010] Preferably, an outer grounding spring piece is provided on the lower end surface of the short - circuit clip. The cross - section of the outer grounding spring piece is U - shaped. The lower end surface of the short - circuit clip is placed inside the U - shape of the outer grounding spring piece. The lower end surface of the short - circuit clip is fixedly connected to the inner side surface of the U - shape of the outer grounding spring piece. The outer side surface of the outer grounding spring piece is in contact with the inner side surface of the annular spring piece. The U - shaped cross - section of the outer grounding spring piece facilitates the connection and fixation with the short - circuit clip, and can also increase the contact area with the annular spring piece, increasing the conduction efficiency.

[0011] Preferably, a card slot and a sealing ring are provided on the outer side surface of the injection molded body. The card slot surrounds the outer side surface of the injection molded body. The card slot is placed below the metal insert. The sealing ring is placed in the card slot. The sealing ring is snap - fitted to the injection molded body through the card slot. The outer side surface of the sealing ring is in contact with the inner wall of the generator housing. The sealing ring can fix the injection - molded igniter in the generator housing, and the installation is convenient.

[0012] The beneficial effects of the present utility model are as follows: while improving insulation, it can achieve the purpose of grounding and releasing static electricity by using a wire harness with a grounding function for grounding; the groove can fixedly place the short-circuit clip, making the short-circuit clip in close connection with the grounding spring piece, and together with the wire harness on the firing element, the circuit is made conductive; the annular spring piece is responsible for making contact with the short-circuit clip to the maximum extent, and the strip-shaped grounding spring piece is convenient to pass through the injection molding body and be placed outside; the outer diameter of the strip-shaped grounding spring piece is slightly larger than the inner diameter of the generator housing, which is convenient for the strip-shaped grounding spring piece to be in close contact with the inner wall of the generator housing during installation, and the installation is more stable; the cross-section of the outer grounding spring piece is U-shaped, which is convenient for connecting and fixing with the short-circuit clip, and can also increase the contact area with the annular spring piece, increasing the conduction efficiency; the sealing ring can fix the injection molding igniter in the generator housing, and the installation is convenient. Description of the Drawings

[0013] Figure 1 is the sectional view of the front view of the present utility model;

[0014] Figure 2 is the sectional view of the front view of the injection molding igniter without the short-circuit clip and the generator housing installed;

[0015] Figure 3 is Figure 2 the top view of;

[0016] Figure 4 is the sectional view of the front view of the short-circuit clip;

[0017] Figure 5 is the top view of the grounding spring piece;

[0018] Figure 6 is the front view of the grounding spring piece.

[0019] In the figures: 1. Firing element, 2. Injection molding body, 3. Metal insert, 4. Generator housing, 5. Short-circuit clip, 6. Annular spring piece, 7. Strip-shaped grounding spring piece, 8. Groove, 9. Wire harness, 10. Outer grounding spring piece, 11. Card slot, 12. Sealing ring. Detailed Embodiment

[0020] The following further describes the present utility model in conjunction with the drawings and specific embodiments.

[0021] As Figure 1 and Figure 3In an embodiment, an injection-molded igniter with a grounding function includes a firing element 1, an injection-molded body 2, a metal insert 3, a grounding spring piece, a short-circuit clip 5, and a generator housing 4. The firing element 1 is placed on the lower end face of the injection-molded body 2. The upper end of the firing element 1 passes through the lower end face of the injection-molded body 2 and is placed above the injection-molded body 2. The metal insert 3 surrounds the outer side surface of the injection-molded body 2. The inner side surface of the metal insert 3 is snap-connected to the outer side surface of the injection-molded body 2. The outer side surface of the metal insert 3 is in contact with the inner wall of the generator housing 4. The grounding spring piece is placed inside the injection-molded body 2. The outer end of the grounding spring piece passes through the injection-molded body 2 and is in contact with the inner wall of the generator housing 4. The short-circuit clip 5 passes through the upper end face of the injection-molded body 2 and is placed inside the injection-molded body 2. The outer side surface of the short-circuit clip 5 is in contact with the inner side surface of the grounding spring piece.

[0022] As Figure 1 , Figure 3 and Figure 5 shown, a groove 8 is provided on the upper end face of the injection-molded body 2. Both the grounding spring piece and the short-circuit clip 5 are placed inside the groove 8. Both the grounding spring piece and the short-circuit clip 5 are in contact with the inner side of the groove 8. A wire harness 9 is provided on the upper end face of the firing element 1. The lower end of the wire harness 9 is fixedly connected to the upper end of the firing element 1. The upper end of the wire harness 9 passes through the injection-molded body 2 and the short-circuit clip 5 and is placed above the injection-molded body 2. The outer side surface of the injection-molded body 2 is in contact with the inner wall of the generator housing 4.

[0023] As Figure 3 and Figure 5 shown, the grounding spring piece includes an annular spring piece 6 and a strip-shaped grounding spring piece 7. There are several strip-shaped grounding spring pieces 7 and they are evenly distributed on the outer side surface of the annular spring piece 6. The inner end of the strip-shaped grounding spring piece 7 is fixedly connected to the outer side surface of the annular spring piece 6. The annular spring piece 6 is placed inside the groove 8. The outer side surface of the annular spring piece 6 is in contact with the inner side surface of the groove 8. The lower end of the short-circuit clip 5 is in contact with the inner bottom surface of the groove 8. The outer side surface of the short-circuit clip 5 is in contact with the inner side surface of the annular spring piece 6. The outer end of the strip-shaped grounding spring piece 7 passes through the inner side wall of the groove 8 and is placed on the outer side surface of the injection-molded body 2. The strip-shaped grounding spring piece 7 is in contact with the inner wall of the generator housing 4.

[0024] As Figure 1 and Figure 2 shown, the strip-shaped grounding spring piece 7 has a fold angle and the outer end of the strip-shaped grounding spring piece 7 is upturned. The outer diameter of the strip-shaped grounding spring piece 7 is slightly larger than the inner diameter of the generator housing 4.

[0025] As Figure 4 and Figure 6 shown, an outer grounding spring piece 10 is provided on the lower end face of the short-circuit clip 5. The cross-section of the outer grounding spring piece 10 is U-shaped. The lower end face of the short-circuit clip 5 is placed inside the U-shape of the outer grounding spring piece 10. The lower end face of the short-circuit clip 5 is fixedly connected to the inner side surface of the U-shape of the outer grounding spring piece 10. The outer side surface of the outer grounding spring piece 10 is in contact with the inner side surface of the annular spring piece 6.

[0026] As Figure 1 and Figure 3 shown, a clamping groove 11 and a sealing ring 12 are provided on the outer side surface of the injection molded body 2. The clamping groove 11 surrounds the outer side surface of the injection molded body 2. The clamping groove 11 is disposed below the metal insert 3. The sealing ring 12 is disposed within the clamping groove 11. The sealing ring 12 is clamped to the injection molded body 2 through the clamping groove 11. The outer side surface of the sealing ring 12 is in contact with the inner wall of the generator housing 4.

[0027] During installation, first insert the groove 8 of the injection molded body 2 into the short - circuit clip 5, such that the outer side surface of the outer grounding spring piece 10 of the short - circuit clip 5 is in contact with the inner wall of the annular spring piece 6. Then install the injection molded body 2 into the generator housing 4. The strip - shaped grounding spring piece 7 has a fold angle and the outer end of the strip - shaped grounding spring piece 7 is upturned. The strip - shaped grounding spring piece 7 also has a certain elasticity. The outer diameter of the strip - shaped grounding spring piece 7 is slightly larger than the inner diameter of the generator housing 4, which enables the strip - shaped grounding spring piece 7 to closely adhere to the inner wall of the generator housing 4. Therefore, the strip - shaped grounding spring piece 7 can ensure good contact, and at the same time enable the outer side surface of the metal insert 3 to be in close contact with the inner wall of the generator housing 4. Then, pass the wire harness 9 on the firing element 1 through the injection molded body 2 and connect it to the corresponding components. Thus, conduction from the generator housing 4 to the injection molded igniter to the short - circuit clip 5 to the wire harness 9 is achieved, so as to realize the grounding release of static electricity, achieving the purpose of improving insulation and using a wire harness with a grounding function to ground and release static electricity.

Claims

1. An injection molded igniter with a grounding function, characterized in that, It includes a firing element (1), an injection molded body (2), a metal insert (3), a grounding spring piece, a short - circuit clip (5) and a generator housing (4). The firing element (1) is placed on the lower end face of the injection molded body (2). The upper end of the firing element (1) passes through the lower end face of the injection molded body (2) and is placed above the injection molded body (2). The metal insert (3) surrounds the outer side surface of the injection molded body (2). The inner side surface of the metal insert (3) is clamped with the outer side surface of the injection molded body (2). The outer side surface of the metal insert (3) is in contact with the inner wall of the generator housing (4). The grounding spring piece is placed inside the injection molded body (2). The outer end of the grounding spring piece passes through the injection molded body (2) and is in contact with the inner wall of the generator housing (4). The short - circuit clip (5) passes through the upper end face of the injection molded body (2) and is placed inside the injection molded body (2). The outer side surface of the short - circuit clip (5) is in contact with the inner side surface of the grounding spring piece.

2. The injection molded igniter with a grounding function according to claim 1, characterized in that, A groove (8) is provided on the upper end face of the injection molded body (2). Both the grounding spring piece and the short - circuit clip (5) are placed in the groove (8). Both the grounding spring piece and the short - circuit clip (5) are in contact with the inner side of the groove (8). A wire harness (9) is provided on the upper end face of the firing element (1). The lower end of the wire harness (9) is fixedly connected to the upper end of the firing element (1). The upper end of the wire harness (9) passes through the injection molded body (2) and the short - circuit clip (5) and is placed above the injection molded body (2). The outer side surface of the injection molded body (2) is in contact with the inner wall of the generator housing (4).

3. The injection molded igniter with a grounding function according to claim 2, characterized in that, The grounding spring piece includes an annular spring piece (6) and a strip - shaped grounding spring piece (7). There are several strip - shaped grounding spring pieces (7) and they are evenly distributed on the outer side surface of the annular spring piece (6). The inner end of the strip - shaped grounding spring piece (7) is fixedly connected to the outer side surface of the annular spring piece (6). The annular spring piece (6) is placed in the groove (8). The outer side surface of the annular spring piece (6) is in contact with the inner side surface of the groove (8). The lower end of the short - circuit clip (5) is in contact with the inner bottom surface of the groove (8). The outer side surface of the short - circuit clip (5) is in contact with the inner side surface of the annular spring piece (6). The outer end of the strip - shaped grounding spring piece (7) passes through the inner side wall of the groove (8) and is placed on the outer side surface of the injection molded body (2). The strip - shaped grounding spring piece (7) is in contact with the inner wall of the generator housing (4).

4. The injection molded igniter with a grounding function according to claim 3, characterized in that, The strip - shaped grounding spring piece (7) has a fold angle and the outer end of the strip - shaped grounding spring piece (7) is upturned. The outer diameter of the strip - shaped grounding spring piece (7) is slightly larger than the inner diameter of the generator housing (4).

5. The injection molded igniter with a grounding function according to claim 3, characterized in that, An outer grounding spring piece (10) is provided on the lower end face of the short - circuit clip (5). The cross - section of the outer grounding spring piece (10) is U - shaped. The lower end face of the short - circuit clip (5) is placed inside the U - shape of the outer grounding spring piece (10). The lower end face of the short - circuit clip (5) is fixedly connected to the inner side surface of the U - shape of the outer grounding spring piece (10). The outer side surface of the outer grounding spring piece (10) is in contact with the inner side surface of the annular spring piece (6).

6. The injection molded igniter with a grounding function according to claim 1, characterized in that, A clamping groove (11) and a sealing ring (12) are provided on the outer side surface of the injection molded body (2). The clamping groove (11) surrounds the outer side surface of the injection molded body (2). The clamping groove (11) is located below the metal insert (3). The sealing ring (12) is placed in the clamping groove (11). The sealing ring (12) is snap-fitted with the injection molded body (2) through the clamping groove (11). The outer side surface of the sealing ring (12) is in contact with the inner wall of the generator housing (4).

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