Pen type ignition coil connected with pressing-inserting type primary coil

Abstract

A pen type ignition coil connected with a pressing and inserting type primary coil comprises a pen type shell, a high-voltage head installed at the lower end of the pen type shell, a low-voltage head installed at the upper end of the pen type shell and a coil assembly installed in the pen type shell. Wherein an ignition module is arranged below the low-voltage head, a low-voltage insertion piece prefabricated part is welded in the low-voltage head through ultrasonic waves, and the low-voltage insertion piece prefabricated part is provided with a low-voltage insertion piece which is in signal connection with the ignition module; a high-pressure pin is arranged in the high-pressure head, and the high-pressure pin is clamped in the high-pressure head through a high-pressure clamp spring. Due to the adoption of the technical scheme, the stability of signal performance in the long-term use process is ensured through the design of the low-voltage insertion piece prefabricated part welded through ultrasonic waves, the design that the high-voltage pin is clamped on the high-voltage head through the high-voltage clamp spring ensures that the ignition coil is in long-term firm and reliable contact with a spark plug in the use process, and the product performance is improved.

Description

Technical Field

[0001] This utility model relates to an ignition coil for automobiles. Background Technology

[0002] In an automotive engine ignition system, an ignition coil is an actuator that provides ignition energy to ignite the air-fuel mixture in the engine cylinder. It is a special pulse booster based on the principle of electromagnetic induction, which switches a low voltage of 8-16V on and off at a set frequency to generate a 20-40KV voltage on its secondary winding, which then produces an electric spark through the spark plug. Utility model patent CN201916099U discloses a pen-type ignition coil with improved heat resistance, comprising a head and a stem. The head housing 23 has a mounting hole 21 and a low-voltage socket 22. The head housing 23 contains high and low voltage windings 24, an iron core 25, and an epoxy resin layer 26. A connecting neck 30 is located at the lower end of the head. The stem is mainly composed of a rubber sleeve 28, one end of which is fitted onto the connecting neck 30. A high-voltage head 27 is installed inside the rubber sleeve 28. One end of the high-voltage head 27 is connected to the high-voltage output terminal of the high and low voltage windings 24, and the other end is connected to the spark plug 31 via a spring 29. Mounting bolts in mounting hole 21 secure the entire pen-type ignition coil to the car engine. Low-voltage socket 22 connects to the car's 12V power plug. Low-voltage socket 22 also connects to the low-voltage input terminal of the high and low voltage windings 4 inside the housing 23. An epoxy resin layer 26 is used for fixation and insulation. Each pen-type coil has a pair of iron cores 25. Rubber sleeve 28 serves two purposes: sealing (waterproofing, dustproofing, and preventing foreign objects from falling into the cylinder), insulation, and guiding (preventing energy loss due to creepage from the high-voltage head and spark plug to the cylinder); and guiding the connection between the high-voltage head 27 and spark plug 31 when the coil is inserted into the cylinder. Spring 29 is fixed to the high-voltage head 27, ensuring a more secure and reliable contact with the spark plug. The coil transforms the 12V to a high voltage of over 38KV. After passing through spring 29, it directly connects to the spark plug 31 in the engine cylinder to generate spark ignition. This type of pen-type ignition coil has problems during use: insufficient structural strength of the low-voltage head and insufficient reliability of the primary coil connection. Summary of the Invention

[0003] In order to solve the problems in the prior art, the purpose of this utility model is to provide a multi-electromagnetic interference suppression pen-type ignition coil that can reduce the electromagnetic interference caused by the ignition coil to the outside world under working conditions.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pen-type ignition coil with a press-fit primary coil connection, comprising a pen-type housing, a high-voltage head installed at the lower end of the pen-type housing, a low-voltage head installed at the upper end of the pen-type housing, and a coil assembly installed inside the pen-type housing; wherein, an ignition module is provided below the low-voltage head, and a low-voltage insert preform is ultrasonically welded inside the low-voltage head, the low-voltage insert preform having a low-voltage insert for signal connection to the ignition module; a high-voltage pin is provided inside the high-voltage head, and the high-voltage pin is secured inside the high-voltage head by a high-voltage snap ring.

[0005] Preferably, the coil assembly includes an iron core, a secondary frame sleeved outside the iron core, and a primary frame sleeved outside the secondary frame. The iron core is wrapped with silicone tape, the secondary frame is wound with secondary windings, and the primary frame is wound with primary windings.

[0006] Preferably, the upper end of the primary frame is provided with a primary connecting piece, the primary connecting piece is independently connected to the primary winding, and the primary connecting piece is connected upward to the ignition module.

[0007] Preferably, the secondary frame is provided with secondary connecting pieces at both ends, one of which is connected upward to the ignition module and the other is connected downward to the high-pressure pin.

[0008] Preferably, magnetic sheets are adsorbed at both ends of the iron core.

[0009] Preferably, a buffer pad is installed at the bottom of the iron core.

[0010] Preferably, the pen casing is provided with an inner magnetic sleeve and an outer magnetic sleeve.

[0011] Preferably, the inner magnetic sleeve is provided with a first positioning strip slot, the outer magnetic sleeve is provided with a second positioning strip slot, and the pen-type outer shell is provided with a positioning strip. The first positioning strip slot and the second positioning strip slot are correspondingly installed on the positioning strip.

[0012] Preferably, a high-pressure sheath is installed at the lower end of the high-pressure head.

[0013] Preferably, the pen-shaped outer casing is provided with a cylinder head cover sealing ring.

[0014] Thanks to the above technical solutions, the design of the low-pressure insert prefabricated component, which is ultrasonically welded, ensures stable signal performance during long-term use. The high-pressure pin is secured to the high-pressure head by a high-pressure snap ring, ensuring that the ignition coil maintains a long-term, secure, and reliable contact with the spark plug during use, and also improving product performance. Attached Figure Description

[0015] Appendix Figure 1 A perspective view of a pen-type ignition coil connected to a primary coil according to the present invention;

[0016] Appendix Figure 2 A three-dimensional exploded view of a pen-type ignition coil connected to a primary coil according to the present invention.

[0017] Appendix Figure 3 This is a cross-sectional view of a pen-type ignition coil connected to a primary coil according to the present invention. Detailed Implementation

[0018] In the following description, the terminology used in the specification will be briefly described, and embodiments will be described in detail. All terms used herein, including descriptive or technical terms, should be interpreted as having the meaning understood by one of ordinary skill in the art. However, these terms may have different meanings depending on the intent of one of ordinary skill in the art, precedent, or the emergence of new technologies.

[0019] Furthermore, some terms may be chosen by the applicant, and in such cases, the meaning of the chosen terms will be described in detail in the detailed description of the embodiments. Therefore, the terms used herein must be defined based on their meanings in conjunction with the description throughout the specification. Additionally, when a component “comprises” or “contains” an element, the component may also include other elements without excluding them, unless there is a specific description to the contrary. In the following description, terms such as “component” and “module” indicate a unit for performing at least one function or operation, wherein units and modules may be implemented as hardware or software or by combining hardware and software.

[0020] Embodiments will now be described more fully with reference to the accompanying drawings. However, embodiments may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the embodiments to those skilled in the art. In the following description, well-known functions or structures are not described in detail, as they would obscure the embodiments with unnecessary detail, and throughout the specification, the same reference numerals in the drawings denote the same or similar elements.

[0021] Appendix Figure 1This is a perspective view of a pen-type ignition coil with a press-fit primary coil connection according to the present invention. The pen-type ignition coil with a press-fit primary coil connection in this embodiment includes a pen-type housing 1, a high-voltage head 2 mounted at the lower end of the pen-type housing 1, a low-voltage head 3 mounted at the upper end of the pen-type housing 1, and a coil assembly mounted inside the pen-type housing 1. An inner magnetic sleeve 14 and an outer magnetic sleeve 15 are fitted around the outside of the pen-type housing 1. A cylinder head cover sealing ring 18 is provided on the pen-type housing 1.

[0022] Appendix Figure 2 A three-dimensional exploded view of the pen-type ignition coil connected by the push-in primary coil according to this utility model; attached. Figure 3 This is a cross-sectional view of the pen-type ignition coil with a press-fit primary coil connection according to this utility model. An ignition module 4 is disposed below the low-pressure head 3. A low-pressure insert preform 5 is ultrasonically welded inside the low-pressure head 3, and the low-pressure insert preform 5 has a low-pressure insert for signal connection to the ignition module 4. A high-pressure pin 6 is disposed inside the high-pressure head 2, and the high-pressure pin 6 is secured inside the high-pressure head 2 by a high-pressure retaining spring 7. A high-pressure sheath 17 is installed at the lower end of the high-pressure head 2.

[0023] The coil assembly includes an iron core 10, a secondary frame 11 sleeved outside the iron core 10, and a primary frame 12 sleeved outside the secondary frame 11. Silicone tape 13 is wrapped around the iron core 10, secondary windings are wound on the secondary frame 12, and primary windings are wound on the primary frame 12. Magnetic sheets 8 are attached to both ends of the iron core 10, and a buffer pad 9 is installed at the bottom of the iron core 10.

[0024] The primary frame 12 has a primary connecting piece 121 at its upper end, which is independently connected to the primary winding and connects upward to the ignition module 4. The connecting piece is independently connected to the primary coil, simplifying the low-voltage insert structure. The secondary frame 11 has secondary connecting pieces 111 at both ends, one connecting upward to the ignition module 4 and the other connecting downward to the high-voltage pin 6.

[0025] The inner magnetic sleeve 14 is provided with a first positioning strip 141, the outer magnetic sleeve 15 is provided with a second positioning strip 151, and the pen-type outer shell 1 is provided with a positioning strip 16. The first positioning strip 141 and the second positioning strip 151 are respectively installed on the positioning strip 16.

[0026] Thanks to the above technical solutions, the design of the low-pressure insert prefabricated component, which is ultrasonically welded, ensures stable signal performance during long-term use. The high-pressure pin is secured to the high-pressure head by a high-pressure snap ring, ensuring that the ignition coil maintains a long-term, secure, and reliable contact with the spark plug during use, and also improving product performance.

[0027] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A pen-type ignition coil with a press-fit primary coil connection, characterized in that: The device includes a pen housing (1), a high-voltage head (2) installed at the lower end of the pen housing (1), a low-voltage head (3) installed at the upper end of the pen housing (1), and a coil assembly installed inside the pen housing (1); wherein, an ignition module (4) is provided below the low-voltage head (3), and a low-voltage insert preform (5) is ultrasonically welded inside the low-voltage head (3), and the low-voltage insert preform (5) has a low-voltage insert connected to the ignition module (4); a high-voltage pin (6) is provided inside the high-voltage head (2), and the high-voltage pin (6) is secured inside the high-voltage head (2) by a high-voltage retainer (7).

2. The pen-type ignition coil with a press-fit primary coil connection according to claim 1, characterized in that: The coil assembly includes an iron core (10), a secondary frame (11) sleeved on the outside of the iron core (10), and a primary frame (12) sleeved on the outside of the secondary frame (11). The iron core (10) is wrapped with silicone tape (13), the secondary frame (11) is wound with secondary windings, and the primary frame (12) is wound with primary windings.

3. The pen-type ignition coil with a press-fit primary coil connection according to claim 2, characterized in that: The primary frame (12) is provided with a primary connecting piece (121) at its upper end. The primary connecting piece (121) is independently connected to the primary winding and is connected upward to the ignition module (4).

4. The pen-type ignition coil with a press-fit primary coil connection according to claim 2, characterized in that: The secondary frame (11) is provided with secondary connecting pieces (111) at both ends, one of which is connected upward to the ignition module (4) and the other is connected downward to the high-pressure pin (6).

5. The pen-type ignition coil with a press-fit primary coil connection according to claim 2, characterized in that: The iron core (10) has magnetic sheets (8) adsorbed at both ends.

6. The pen-type ignition coil with a press-fit primary coil connection according to claim 2, characterized in that: The bottom of the iron core (10) is fitted with a buffer pad (9).

7. The pen-type ignition coil with a press-fit primary coil connection according to claim 1, characterized in that: The pen-type outer shell (1) is provided with an inner magnetic sleeve (14) and an outer magnetic sleeve (15).

8. The pen-type ignition coil with a press-fit primary coil connection according to claim 7, characterized in that: The inner magnetic sleeve (14) is provided with a first positioning strip slot (141), the outer magnetic sleeve (15) is provided with a second positioning strip slot (151), and the pen-type outer shell (1) is provided with a positioning strip (16). The first positioning strip slot (141) and the second positioning strip slot (151) are respectively installed on the positioning strip (16).

9. The pen-type ignition coil with a press-fit primary coil connection according to claim 1, characterized in that: The lower end of the high-pressure head (2) is equipped with a high-pressure sheath (17).

10. The pen-type ignition coil with a press-fit primary coil connection according to claim 1, characterized in that: The pen-shaped outer shell (1) is provided with a cylinder head cover sealing ring (18).

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