An igniter

Abstract

The utility model relates to a kind of igniters, comprising: the connector for taking electricity from USB device, with the connector voltage-boosting oscillation circuit, with the output end of the voltage-boosting oscillation circuit is connected for producing electric arc electrode;Wherein, the voltage-boosting oscillation circuit includes high-frequency transformer, MOS switch and PWM controller;The high-frequency transformer includes primary winding and secondary winding, the primary winding is powered by the connector;The MOS switch is connected with the primary winding in series;The PWM controller is by control the MOS switch to make the circuit of the primary winding controlled opening and closing, and make the secondary winding produce high-voltage oscillation current.The igniter of the utility model uses electric arc to ignite, warm up fast, safer to use.

Description

Technical Field

[0001] This utility model relates to an igniter that can be used for lighting cigarettes, incense, etc. Background Technology

[0002] With the widespread use of mobile phones, mobile phone lighters have also become increasingly common. One type of mobile phone lighter works by drawing power from the phone's charging port to supply a resistance wire, which then heats up. One drawback of this type is the long preheating time before and after use, especially when exposed to wind. For example, it takes time for the resistance wire to reach several hundred degrees Celsius after being energized. Another disadvantage is its safety; it can easily cause burns to users.

[0003] Therefore, a solution is urgently needed. Utility Model Content

[0004] One object of this application is to provide an igniter that heats up quickly and is safer.

[0005] To address this, the present invention provides an igniter, comprising: a connector for drawing power from a USB-C device; a boost oscillation circuit electrically connected to the connector; and an electrode connected to the output terminal of the boost oscillation circuit for generating an electric arc. The boost oscillation circuit comprises: a high-frequency transformer, the high-frequency transformer including a primary winding and a secondary winding, the primary winding being powered by the connector; a MOS switch, the MOS switch being connected in series with the primary winding; and a PWM controller, the PWM controller controlling the MOS switch to control the controlled opening and closing of the circuit of the primary winding, and to generate a high-voltage oscillating current in the secondary winding.

[0006] In one embodiment of the present invention, the electrode includes a first electrode and a second electrode, the inner ends of the first electrode and the second electrode are respectively electrically connected to the two output ends of the secondary winding, and the outer ends of the first electrode and the second electrode are used to generate an electric arc.

[0007] In one embodiment of this utility model, the operating frequency of the PWM controller is not lower than 13kHz and not higher than 25kHz.

[0008] In one embodiment of this utility model, the number of turns of the secondary winding is more than 100 times the number of turns of the primary winding; the output voltage of the secondary winding is not less than 5 kV and not more than 20 kV.

[0009] In one embodiment of this utility model, the number of turns of the secondary winding is more than 500 times the number of turns of the primary winding; the output voltage of the secondary winding is not less than 5 kV and not more than 20 kV.

[0010] In one embodiment of this utility model, the number of turns of the secondary winding is more than 1,000 times the number of turns of the primary winding; the output voltage of the secondary winding is not less than 5 kV and not more than 20 kV.

[0011] In one embodiment of this utility model, the connector is one of the following connectors: USB Type A connector, USB Type C connector, Lightning connector.

[0012] In one embodiment of this utility model, the voltage of the connector is not less than 3 volts and not more than 25 volts, and the current is not less than 400 mA and not more than 6 A.

[0013] In one embodiment of this utility model, the voltage of the connector is not less than 3.2 volts and not more than 5.5 volts, and the current is not less than 400 mA and not more than 1 A.

[0014] In one embodiment of the present invention, an insulating electrode support is further included. The electrode support includes a first positioning hole and a second positioning hole, which are used to position the first electrode and the second electrode, respectively. The outer ends of the first electrode and the second electrode are located outside the electrode support.

[0015] In one embodiment of this utility model, the first positioning hole and the second positioning hole are through holes or grooves.

[0016] In one embodiment of this utility model, a circuit board is also included; the high-frequency transformer, MOS switch and PWM controller are disposed on the circuit board; the circuit board and electrodes are connected in sequence.

[0017] In one embodiment of the present invention, a housing is also included, from which the connector extends; the boost oscillation circuit is housed within the housing.

[0018] In one embodiment of this utility model, at least one of a first protection circuit and a second protection circuit is further included; the first protection circuit is used to provide current limiting protection for the PWM controller, and includes a first capacitor and a third resistor; the first terminal of the first capacitor is grounded, the second terminal is connected to the first terminal of the third resistor, the second terminal of the third resistor is connected to the power supply voltage line of the connector, and the first terminal of the third resistor is connected to the PWM controller; the second protection circuit is used to provide current limiting protection for the MOS switch, and includes a sixth resistor connected in series between the PWM controller and the MOS switch.

[0019] In one embodiment of the present invention, a buffer circuit for eliminating the high voltage generated by the MOS switch being turned off is further included, the buffer circuit including a third capacitor connected in parallel with the primary winding.

[0020] In one embodiment of this utility model, a filtering circuit for filtering the power supply voltage line is further included. The filtering circuit includes a fourth capacitor and a sixth capacitor, both of which are grounded capacitors. The fourth capacitor, the third resistor, and the sixth capacitor are connected sequentially to different positions on the power supply voltage line.

[0021] The igniter of this invention uses an electric arc for ignition, which results in rapid heating and greater safety. Attached Figure Description

[0022] To further illustrate the specific technical details of this case, please refer to the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of an igniter provided in an embodiment of this utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the igniter after the housing has been removed, taken from one perspective.

[0025] Figure 3 yes Figure 2 The circuit diagram of the component shown is as follows;

[0026] Figure 4 yes Figure 2 The circuit diagram of the connector of the component shown. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will now be described with reference to the accompanying drawings.

[0028] The technical solutions in the embodiments of this utility model will now be described with reference to the accompanying drawings.

[0029] refer to Figure 1 and Figure 2 An igniter 100 provided in one embodiment of the present invention includes: a housing 10; a connector 20 extending from the housing 10 for drawing power from a USB device; a circuit board 30 connected to the connector 20 and housed within the housing 10; a boost oscillation circuit disposed on the circuit board 30 and housed within the housing 10; and an electrode for generating an electric arc connected to the output terminal of the boost oscillation circuit.

[0030] In this embodiment, the housing 10 includes a first half-shell 11 and a second half-shell 17, at least one of which is cylindrical. The first half-shell 11 and the second half-shell 17 are axially connected together. The electrode support 50 is fixed to the first half-shell 11. The housing 10 forms a receiving cavity for housing the circuit board 30, the boost oscillation circuit, and the electrode support 50. The electrode support 50 is located near the second half-shell 17, which has a through hole 18 to allow cigarettes or incense sticks to be inserted. Preferably, the high-frequency transformer 32 and the MOS switch are located on opposite sides of the circuit board 30 to facilitate housing the circuit board 30 within the housing 10 and to facilitate heat dissipation.

[0031] In this specification and claims, USB devices include both traditional USB hosts such as mobile phones and computers, and non-USB hosts that conform to the USB protocol, such as power adapters and power banks with USB female ports. Furthermore, some iPhone models from Apple Inc., although using a Lightning connector, are compatible with the USB protocol and therefore also fall under the category of USB devices described in this specification and claims. Correspondingly, connector 20 refers to a connector capable of drawing power from the aforementioned various similar USB devices, and its form can be a USB Type-A connector, a USB Type-C connector (i.e., a Type-C connector), a Lightning connector, etc.

[0032] In this embodiment, the boost oscillation circuit includes a high-frequency transformer 32 and a switching circuit 34. The high-frequency transformer includes a primary winding and a secondary winding, with the primary winding powered by connector 20. The switching circuit 34 includes a MOS switch and a PWM controller. The MOS switch is connected in series with the primary winding, and the PWM controller controls the MOS switch to control the opening and closing of the primary winding circuit, and to generate a high-voltage oscillating current in the secondary winding. Preferably, the output voltage of the secondary winding is not less than 5 kV and not more than 20 kV. The operating frequency of the PWM controller is not less than 13 kHz and not more than 25 kHz.

[0033] In this embodiment, the electrodes include a first electrode 36 and a second electrode 37. The igniter 100 also includes an electrode support 50, which includes a first positioning hole 56 for supporting the first electrode 36 and a second positioning hole 57 for supporting the second electrode 37. Preferably, the electrode support 50 is an insulating and heat-resistant ceramic component.

[0034] In this embodiment, both the first positioning hole 56 and the second positioning hole 57 are through holes. Understandably, the first positioning hole 56 and the second positioning hole 57 can also be grooves, or a combination of through holes and grooves, as long as they define the position of the electrodes. The outer ends of the first electrode 36 and the second electrode 37 are located outside the electrode support 50 and are used to generate an electric arc.

[0035] In this embodiment, the electrode holder 50 includes a circuit board mounting hole 55, and a portion of the circuit board 30 is mounted into the mounting hole 55. The housing 10 includes an axially extending support arm, and the electrode holder 50 is fixed to the end of the support arm by a connector. Preferably, the housing 10 includes an axially extending support arm. The electrode holder 50 is ring-shaped and includes axial fixing holes 53 and 54; the electrode holder 50 is mounted to the end of the support arm and is fixedly connected to the support arm by connectors or connecting portions passing through the fixing holes 53 and 54.

[0036] Compared to traditional igniters that use resistance wire heating, this new igniter quickly generates an electric arc for ignition after being powered on, and the arc disappears immediately and cools down rapidly after power is cut off, making it safer to use. Furthermore, the higher arc temperature makes it easier for users to light cigarettes or incense, thus shortening the igniter's continuous operating time and further preventing the igniter body from overheating. This type of igniter does not require a built-in battery, eliminating the risk of fire.

[0037] refer to Figure 3 The VBUS on the left indicates the voltage the connector draws from the USB device. Under normal circumstances, a USB device can output 5 volts and 500-1000 mA of current, with some fluctuations under specific conditions. Certain USB female ports can provide higher current and / or voltage. Preferably, the connector draws power at a voltage no lower than 3 volts and no more than 6 volts, and a current no lower than 400 mA and no more than 1 A. In alternative solutions, a certain USB female port, such as a QC-enabled power adapter, can output up to 25 volts and up to 6 A of current; correspondingly, the connector can draw power at a voltage no lower than 3 volts and no more than 25 volts, and a current no lower than 400 mA and no more than 6 A.

[0038] The high-frequency transformer L1 includes a primary winding and a secondary winding. The primary winding is connected in series with the MOS switch U4 and is powered by the power supply VBUS.

[0039] The PWM controller U1 controls the MOS switch U4 to control the circuit of the primary winding of the high-frequency transformer L1 to open and close in a controlled manner, and to generate a high-voltage oscillating current in the secondary winding of the high-frequency transformer L1.

[0040] The number of turns in the secondary winding of the high-frequency transformer L1 is more than 100 times the number of turns in the primary winding. In one alternative, the number of turns in the secondary winding of the high-frequency transformer L1 is more than 500 times the number of turns in the primary winding; in another alternative, the number of turns in the secondary winding of the high-frequency transformer L1 is more than 1000 times the number of turns in the primary winding. Preferably, the output voltage of the secondary winding is not less than 5 kV and not more than 20 kV. The operating frequency of the PWM controller is not less than 13 kHz and not more than 25 kHz.

[0041] The inner ends of the first and second electrodes are electrically connected to the two output terminals of the secondary winding of the high-frequency transformer L1, respectively. The outer ends of the first and second electrodes are used to generate an electric arc.

[0042] refer to Figure 3 The igniter also includes a first protection circuit for current limiting protection of the PWM controller U1. The first protection circuit includes a first capacitor C1 and a third resistor R3; the first terminal of the first capacitor C1 is grounded, the second terminal is connected to the first terminal of the third resistor R3, the second terminal of the third resistor R3 is connected to the power supply voltage line VBUS of the connector, and the first terminal of the third resistor R3 is connected to the PWM controller. Understandably, the first protection circuit may also include a second capacitor C2 connected in parallel with the first capacitor C1 to further improve the protection effect.

[0043] The igniter also includes a second protection circuit for current limiting protection of the MOS switch U4. The second protection circuit includes a sixth resistor R6 connected in series between the PWM controller U1 and the MOS switch U4. The sixth resistor R6 limits the current to the PWM signal output by the PWM controller, protecting the circuit from burnout, and also prevents the gate signal of the MOS switch U4 from self-excited, thus protecting the power components from burnout.

[0044] The igniter also includes a buffer circuit for eliminating the high voltage generated by the cutoff of the MOS switch U4. The buffer circuit includes a third capacitor C3 connected in parallel with the primary winding.

[0045] The igniter also includes a filtering circuit for filtering the power supply voltage line VBUS. The filtering circuit includes a fourth capacitor C4 and a sixth capacitor C6, both of which are grounded capacitors. The fourth capacitor C4, the third resistor, and the sixth capacitor C6 are sequentially connected to different locations on the power supply voltage line VBUS. In an alternative embodiment, the filtering circuit may also include a fifth capacitor C5 connected in parallel with the fourth capacitor C4 to further improve the filtering effect.

[0046] refer to Figure 4In this embodiment, connector J1 is a USB Type-C connector, which can be plugged into devices with a corresponding female port, such as smartphones, laptops, and power adapters. Understandably, according to the Type-C specification, a full-featured Type-C connector has two symmetrically distributed rows of terminals, each row having a corresponding VBUS power terminal for drawing power from the USB device. In this invention, the VBUS power terminal is mainly used; terminals related to data transmission can be omitted or left unconnected.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An igniter, characterized in that, include: A connector for drawing power from a USB device, a boost oscillation circuit electrically connected to the connector, and an electrode connected to the output of the boost oscillation circuit for generating an electric arc; wherein the boost oscillation circuit includes: A high-frequency transformer, comprising a primary winding and a secondary winding, wherein the primary winding is powered by the connector; MOS switch, wherein the MOS switch is connected in series with the primary winding; A PWM controller controls the MOS switch to control the circuit of the primary winding to open and close in a controlled manner, and to generate a high-voltage oscillating current in the secondary winding.

2. The igniter as described in claim 1, characterized in that, The electrode includes a first electrode and a second electrode. The inner ends of the first electrode and the second electrode are electrically connected to the two output terminals of the secondary winding, respectively. The outer ends of the first electrode and the second electrode are used to generate an electric arc.

3. The igniter according to claim 1, characterized in that, The operating frequency of the PWM controller is not lower than 13kHz and not higher than 25kHz.

4. The igniter as described in claim 1, characterized in that, The number of turns in the secondary winding is more than 100 times the number of turns in the primary winding; the output voltage of the secondary winding is not less than 5 kV and not more than 20 kV.

5. The igniter as described in claim 1, characterized in that, The connector is one of the following: USB Type-A connector, USB Type-C connector, Lightning connector; the voltage of the connector is not less than 3 volts and not more than 25 volts, and the current is not less than 400 mA and not more than 6 A.

6. The igniter as described in claim 2, characterized in that, It also includes an insulating electrode holder, which includes a first positioning hole and a second positioning hole for positioning the first electrode and the second electrode, respectively; the outer ends of the first electrode and the second electrode are located outside the electrode holder.

7. The igniter as described in claim 1, characterized in that, It also includes a circuit board and a housing; the high-frequency transformer, MOS switch and PWM controller are disposed on the circuit board; the circuit board and electrodes are connected in sequence; the connector extends from the housing; the boost oscillation circuit is housed within the housing.

8. The igniter as described in claim 1, characterized in that, It also includes at least one of the first protection circuit and the second protection circuit; wherein: The first protection circuit is used to provide current limiting protection for the PWM controller, and includes a first capacitor (C1) and a third resistor (R3); the first terminal of the first capacitor (C1) is grounded, the second terminal is connected to the first terminal of the third resistor (R3), the second terminal of the third resistor (R3) is connected to the power supply voltage line of the connector, and the first terminal of the third resistor (R3) is connected to the PWM controller. The second protection circuit is used to provide current limiting protection for the MOS switch, and includes a sixth resistor (R6) connected in series between the PWM controller and the MOS switch.

9. The igniter as described in claim 1, characterized in that, It also includes a buffer circuit for eliminating the high voltage generated by the MOS switch being turned off, the buffer circuit including a third capacitor (C3) connected in parallel with the primary winding.

10. The igniter as described in claim 8, characterized in that, It also includes a filtering circuit for filtering the power supply voltage line. The filtering circuit includes a fourth capacitor (C4) and a sixth capacitor (C6). Both the fourth capacitor (C4) and the sixth capacitor (C6) are grounded capacitors. The fourth capacitor (C4), the third resistor, and the sixth capacitor (C6) are connected to different positions of the power supply voltage line in sequence.

Images