An ignition coil and its forming process

Abstract

The present invention relates to an igniter high-voltage package and its forming process. The high-voltage package includes a coil and a housing. The coil is encapsulated and fixed in the housing with a number of pins. Two pins are power pins, one pin is a ground pin, and the rest are output pins. The housing includes a main body and a cover plate. The main body has openings at both the top and bottom. The cover plate is fixedly connected to the main body to cover the lower opening of the main body. The upper opening of the main body is the potting port. A number of inserts are inserted into the main body, and the inserts extend into the lower opening of the main body. The coil is placed inside the main body, and all pins are facing the cover plate. The power pins pass through the holes provided on the cover plate and extend out. The output pins are bent inside the lower opening of the main body and connected to the inserts. The ground pin either passes through the hole provided on the cover plate and extends out or is bent inside the lower opening of the main body and connected to the inserts. The lower opening is used to achieve the soldering connection between the inserts and the pins of the coil, effectively ensuring the connection effect. The lower opening is sealed by the cover plate, and then potted and sealed through the upper opening to ensure the sealing effect.

Description

Technical Field

[0001] The present invention relates to an igniter, and more particularly to an igniter high-voltage package and its forming process. Background Art

[0002] Traditional igniter high-voltage package;

[0003] As described in a patent, 202022865532.5, a high-insulation ignition transformer has a sealed upper end and an open lower end on its outer shell. The coil pins are plug pins that directly extend out from the lower opening of the outer shell and are sealed with glue poured from the lower opening of the outer shell. Each solder joint is directly wrapped in the glue, and the surface of the cured glue is often a curved surface, resulting in poor sealing effect during use.

[0004] Another high-voltage package, such as a Korean model, has an open upper end and a sealed lower end on its outer shell. During the processing, multiple inserts are directly injection-molded on the outer shell, the coil is placed inside the outer shell, and the pins are respectively clamped with the inserts and sealed with glue poured from the upper opening. 1) The connection between the coil and the socket is not good; 2) This design greatly increases the injection molding difficulty of the outer shell and makes the mold opening more complex. Summary of the Invention

[0005] To solve the above problems, the present invention provides an igniter high-voltage package and its forming process.

[0006] Technical Solution of the Present Invention:

[0007] An igniter high-voltage package, the high-voltage package includes a coil and an outer shell. The coil is sealed with glue inside the outer shell and has several pins. Among all the pins, two pins are power pins, one pin is a ground pin, and the rest are output pins. The outer shell includes a main body and a cover plate. The main body has openings at both the upper and lower ends. The cover plate is fixedly connected to the main body and covers the lower opening of the main body. The upper opening of the main body is the glue pouring port.

[0008] Several inserts are inserted on the main body and extend into the lower opening of the main body. The coil is placed inside the main body, and all the pins are facing the cover plate. The power pins pass through the holes provided on the cover plate and extend out. The output pins are bent inside the lower opening of the main body and connected to the inserts. One output pin is connected to one insert. The ground pin passes through the hole provided on the cover plate and extends out or is bent inside the lower opening of the main body and connected to the insert. One ground pin is connected to one insert.

[0009] All the pins of the coil are plug pins.

[0010] The cover plate is welded to the main body.

[0011] The output pins and the ground pin are both welded to the inserts.

[0012] Positioning posts are respectively arranged on both sides of the bottom of the main body, and arc-shaped positioning notches are respectively arranged on both sides of the cover plate; when the main body is connected to the cover plate, the positioning posts are inserted into the positioning notches one by one.

[0013] The cover plate is embedded in the lower opening of the main body.

[0014] Bosses are respectively arranged at the four corners of the inner wall of the main body, and the bosses respectively abut against the skeletons of the coils.

[0015] The forming process of the above-mentioned ignition coil high-voltage pack: first insert the insert piece into the main body, then place the coil in the main body, bend the output pins of the coil and connect them to the insert piece; cover the cover plate, the cover plate covers the lower opening of the main body, and pass the power pins of the coil through the holes on the cover plate, connect the cover plate and the main body; pour glue from the upper opening of the main body to cover the coil, and wait for the glue to cure to complete the ignition coil high-voltage pack.

[0016] The advantages of the present invention are reasonable design, simple structure, combining the advantages of the traditional two high-voltage packs, adopting a split design for the housing, using the lower opening to realize the welding connection between the insert piece and the coil pins, effectively ensuring the connection effect, using the cover plate to seal the lower opening, and then pouring glue from the upper opening to seal and fix, effectively ensuring the sealing effect; adopting this design greatly reduces the injection molding difficulty of the housing. Description of the Drawings

[0017] Figure 1 It is the three-dimensional view (1) of the ignition coil high-voltage pack in Embodiment 1.

[0018] Figure 2 It is the three-dimensional view (2) of the ignition coil high-voltage pack in Embodiment 1.

[0019] Figure 3 It is the three-dimensional view (1) of the ignition coil high-voltage pack in Embodiment 2.

[0020] Figure 4 It is the three-dimensional view (2) of the ignition coil high-voltage pack in Embodiment 2.

[0021] Figure 5 It is the three-dimensional view of the housing.

[0022] Figure 6 It is the top view of the housing.

[0023] Figure 7 It is the three-dimensional view of the cover plate.

[0024] In the figure, coil 1, pin 11, skeleton 12 of the coil, housing 2, main body 21, cover plate 22, positioning post 23, arc-shaped positioning notch 24, boss 25, insert piece 3. Detailed Embodiments

[0025] Embodiment 1

[0026] AsFigure 1-2 As shown in FIGS. 5 - 7, an ignition coil includes a coil 1 and a housing 2. The coil 1 is potted and fixed within the housing 2 and has a number of pins 11. Among all the pins 11, two pins 11 are power pins, one pin 11 is a ground pin, and the remaining pins 11 are output pins. The housing 2 includes a main body 21 and a cover plate 22. The main body 21 has openings at both the top and bottom. The cover plate 22 is fixedly connected to the main body 21 to cover the lower opening of the main body 21. The upper opening of the main body 21 is a potting port. A number of inserts 3 are inserted into the main body 21, and the inserts 3 extend into the lower opening of the main body 21. The coil 1 is placed within the main body 21, and all the pins 11 face the cover plate 22. The power pins pass through holes provided in the cover plate 22 and extend out. The output pins are bent within the lower opening of the main body 21 and connected to the inserts 3, with one output pin connected to one insert 3. The ground pin is bent within the lower opening of the main body 21 and connected to the insert 3, with one ground pin connected to one insert. All the pins 11 of the coil are pin needles. The cover plate 22 is welded to the main body 21. Positioning posts 23 are respectively provided on both sides of the bottom of the main body 21, and arc-shaped positioning notches 24 are respectively provided on both sides of the cover plate 22. When the main body 21 is connected to the cover plate 22, the positioning posts 23 respectively extend into the positioning notches 24. The cover plate 22 is embedded within the lower opening of the main body 21. Protrusions 25 are respectively provided at the four corners of the inner wall of the main body 21, and the protrusions 25 respectively abut against the skeleton 12 of the coil.

[0027] Embodiment 2

[0028] As Figures 3-7As shown in the figure, an ignition coil includes a coil 1 and a housing 2. The coil 1 is encapsulated in the housing 2 with glue, and it has several pins 11. Among all the pins 11, two pins 11 are power pins, one pin 11 is a ground pin, and the remaining pins 11 are output pins; the housing 2 includes a main body 21 and a cover plate 22. The main body 21 has openings at both the top and bottom. The cover plate 22 is fixedly connected to the main body 21 to cover the lower opening of the main body 21. The upper opening of the main body 21 is a glue filling port; several inserts 3 are inserted into the main body 21, and the inserts 3 extend into the lower opening of the main body 21; the coil 1 is placed inside the main body 21, and all the pins 11 are facing the cover plate 22. The power pins pass through the holes provided on the cover plate 22 and extend out. The output pins are bent inside the lower opening of the main body 21 and connected to the inserts 3. One output pin is connected to one insert 3, and the ground pin passes through the holes provided on the cover plate 22 and extends out; all the pins 11 of the coil are pin needles; the cover plate 22 is welded to the main body 21; positioning posts 23 are respectively provided on both sides of the bottom of the main body 21, and arc-shaped positioning notches 24 are respectively provided on both sides of the cover plate 22; when the main body 21 is connected to the cover plate 22, the positioning posts 23 respectively extend into the positioning notches 24; the cover plate 22 is embedded in the lower opening of the main body 21; convex platforms 25 are respectively provided at the four corners of the inner wall of the main body 21, and the convex platforms 25 respectively abut against the skeleton 12 of the coil.

[0029] A forming process of the above ignition coil: First, insert the insert 3 into the main body 21, then place the coil 1 inside the main body 21, bend the output pins of the coil 1 and connect them to the insert 3; cover the cover plate 22, the cover plate 22 covers the lower opening of the main body 21, and pass the power pins of the coil through the holes on the cover plate 22, connect the cover plate 22 and the main body 21; fill glue from the upper opening of the main body 21 to cover the coil 1, and wait for the glue to solidify to complete the ignition coil.

[0030] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An ignition coil, said coil comprising a coil and a housing, the coil being potted and sealed within the housing, having a number of pins, of which two pins are power pins, one pin is a ground pin, and the remaining pins are output pins; characterized in that, The housing includes a main body and a cover plate. The main body has openings at both the top and bottom. The cover plate is fixedly connected to the main body to cover the lower opening of the main body. The upper opening of the main body is the potting port. A number of inserts are inserted into the main body, and the inserts extend into the lower opening of the main body. The coil is placed inside the main body, and all the pins face the cover plate. The power pins pass through the holes provided on the cover plate and extend out. The output pins are bent inside the lower opening of the main body and connected to the inserts. One output pin is connected to one insert. The ground pins pass through the holes provided on the cover plate and extend out or are bent inside the lower opening of the main body and connected to the inserts. One ground pin is connected to one insert. All the pins of the coil are pin needles. The cover plate is fusion-welded to the main body.

2. The ignition coil according to claim 1, characterized in that, The output pins and the ground pins are welded to the inserts.

3. The ignition coil according to claim 1, characterized in that, Positioning posts are respectively provided on both sides of the bottom of the main body, and arc-shaped positioning notches are respectively provided on both sides of the cover plate. When the main body is connected to the cover plate, the positioning posts respectively extend into the positioning notches in a one-to-one correspondence.

4. The ignition coil according to claim 1, characterized in that, The cover plate is embedded in the lower opening of the main body.

5. The ignition coil according to claim 1, characterized in that, Convex platforms are respectively provided at the four corners of the inner wall of the main body, and the convex platforms respectively abut against the skeleton of the coil.

6. A forming process for the ignition coil according to any one of claims 1-5, characterized in that, The forming process: First, insert the inserts into the main body, then place the coil inside the main body, bend the output pins of the coil and connect them to the inserts. Cover the cover plate, and the cover plate covers the lower opening of the main body. Pass the power pins of the coil through the holes on the cover plate, connect the cover plate and the main body. Pot the glue from the upper opening of the main body to cover the coil. Wait for the glue to cure, and then the ignition coil high-voltage pack is completed.

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