GAS COMBUSTOR WITH IGNITING AND COMBUSTION ASSISTING FUNCTION

Description

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a gas combustor, especially to a gas combustor with an igniting and combustion assisting function.

Description of the Related Art

Fire is a must have element in our lives. Fire can be used for cooking food and providing lights, and the fire can also be used for combustion operations such as forging, soldering and welding. Take a gas combustor, such as a refillable lighter or a portable gas stove, as an example, an object can be ignited or food can be cooked. As such, the gas combustor still plays an important role in our lives which cannot be easily replaced.

Take barbecuing as an instance, an igniting source, such as a tinder, is adopted to ignite combustibles, such as charcoals, so that a non-burning status is formed to barbecue foods, such as meats. The combusting efficiency of the tinder is not good, thus the charcoals are not easy to be ignited, and the difficulty bothers the users. As such, the user tries another type of igniting source, such as a gas blowtorch or the aforesaid gas combustor to ignite the charcoals, the gas blowtorch or the gas combustor have advantages of concentrating flame, having firing strength, not easy to be quelled and continuously supplying, thus the charcoals can be rapidly ignited.

As a matter of fact, the necessary condition of combusting objects requires not only the aforesaid igniting source and the combustibles, but a combustion accelerant, such as oxygen, is also needed. In other words, the combustion of combustibles requires the assistance of the combustion accelerant, thus most of the combustion operations require the oxygen. Moreover, it is understood that the wind can also assist the combustion, and the main reason is that the wind brings more oxygen. The air is driven to flow through the combustibles to make the combustibles provided with even more oxygen, thereby enhancing the fire. Accordingly, during the barbecuing process, the user may adopt various types of fanning manners or blowing manners to generate an airflow flowing toward the charcoals after the gas combustor ignites the charcoals, so as to supply oxygen to the charcoals to assist the combustion of the charcoals.

However, the gas blowtorch or the gas combustor can provide an igniting function, but a combustion assisting function is not available. As such, how to integrate the igniting function and the combustion assisting function for providing a convenience operation when the combustibles are desired to be ignited shall be improved by the skilled people in the art.

SUMMARY OF THE INVENTION

One primary objective of the present invention is to provide a gas combustor with an igniting and combustion assisting function, in which an igniting device and a combustion assisting device are disposed in a main body, wherein a flame generated by the igniting device is ejected out from a flame ejecting pipe, an airflow generated by the combustion assisting device is blown out from an air conveying pipe, the flame ejecting pipe and the air conveying pipe are provided with a double pipe design, so that a shunting effect is provided to the flame and the airflow (a wind force), thus an igniting and combustion assisting function is provided, and the operating convenience of the gas combustor is increased.

Another objective of the present invention is to provide a gas combustor with an igniting and combustion assisting function, in which an igniting device includes an ignition switch capable of igniting fuel gas and generating a flame, a combustion assisting device includes a fan switch capable of actuating an electric motor and driving an impeller to operate for generating an airflow; when the ignition switch is operated, the fan switch is unable to be operated; on the other hand, when the fan switch is operated, the ignition switch cannot be operated, thus a situation of both of the fan switch and the ignition switch being operated is avoided.

One another objective of the present invention is to provide a gas combustor with an igniting and combustion assisting function, in which an ignition switch and a fan switch respectively have an ignition safety button and a fan safety button for preventing unintentional and incidental operations, thus the operation safety is greatly increased.

For achieving said objectives, one technical solution provided by the present invention is to provide a gas combustor with an igniting and combustion assisting function, which includes a main body, and an igniting device and a combustion assisting device disposed in the main body; wherein a control part is disposed at a top end of the main body, the control part allows an ignition switch of the igniting device and a fan switch of the combustion assisting device to be disposed; when the ignition switch is pressed, a fuel gas supplying mechanism and a piezoelectric device are simultaneously controlled to be operated to make fuel gas be supplied to a flame ejecting mechanism, after the fuel gas and air are mixed in the flame ejecting mechanism, the mixed fuel gas is ejected out from a flame ejecting nozzle in a flame ejecting pipe protruded from a first pipe port at a front end of the main body, after a high static voltage is transferred to the flame ejecting nozzle by the piezoelectric device, the mixed fuel gas is ignited to form a flame ejected out from the flame ejecting pipe; and after the fan switch is pushed, a battery module, an electric motor and an impeller are controlled to form a power connection, the impeller is enabled to be operated to make a generated airflow be blown out from an air conveying pipe protruded from a second pipe port at the front end of the main body, wherein the flame ejecting pipe and the air conveying pipe are provided with a double pipe design, so that a shunting effect is provided to the flame and the airflow.

According to one embodiment of the present invention, the ignition switch is partially protruded out from an opening of the control part, the fan switch is disposed in a rear slide slot located at a rear end of the opening; wherein a front tenon is protruded from a front end of the fan switch, and a rear block member is protruded from a rear end of the ignition switch; when the ignition switch is in a pressed status, a block effect is formed by the rear block member interfering the front tenon, so that the fan switch is unable to be pushed; when the ignition switch is in a unpressed status, a staggering status is formed by the front tenon and the rear block member, so that the fan switch is pressed to be operated.

According to one embodiment of the present invention, a handgrip allowing a user to hold with single hand is formed at a rear segment of the main body, the igniting device includes a gas storage tank disposed in the handgrip, the fuel gas supplying mechanism is disposed at a front end of the gas storage tank, the fuel gas supplying mechanism includes a gas discharging valve disposed at the front end of the gas storage tank, a gas conveying soft pipe having an upstream end thereof sheathed with the gas discharging valve, a gas ejecting nozzle disposed at a downstream end of the gas conveying soft pipe, and a gas discharging press plate having one end thereof sheathed with the gas discharging valve, and the gas discharging press plate is pivotally connected to a pivotal shaft disposed at a bottom end defined inside the control part.

According to one embodiment of the present invention, the gas discharging valve is further sheathed with a regulation ring, a pull rod is laterally protruded from the regulation ring, the pull rod passes an elongated regulation slot preformed on the main body; when the pull rod is rotated, the regulation ring simultaneously drives the gas discharging valve to rotate to regulate a supplying amount of fuel gas.

According to one embodiment of the present invention, a press part disposed at a top end of the ignition switch is protruded out from the opening, the piezoelectric device is sheathed between a chamber at one side of the ignition switch and a bottom block wall inside the control part, the piezoelectric device has a conducting wire extended to the flame ejecting nozzle, and an electricity return wire connected to the flame ejecting mechanism.

According to one embodiment of the present invention, the igniting device further includes a continuous button, the continuous button is sheathed with a button hole of the main body, a periphery of the continuous button is inwardly protruded with a block tenon having a buckle slot, and at least two support arms, the block tenon and the at least two support arms pass an inner block wall formed in the button hole, and a hook part of the at least two support arms respectively forms a block effect with a corresponding inner block hole, so that the continuous button is prevented from being released from the button hole; the ignition switch has a buckle hook capable of being buckled with or released from the buckle slot and arranged at a location corresponding to the buckle slot; when the ignition switch is kept to be in a pressed status, the gas discharging press plate is continuously pressed, the gas discharging valve is continuously kept to be in a fuel gas supplying status; or when the ignition switch is returned to a non-pressed status, the ignition switch is recovered to an initial position where the fuel gas does not supply through an elastic recovery force of the gas discharging valve, and the gas discharging press plate is driven to an initial position, thus the fuel gas supply is terminated.

According to one embodiment of the present invention, a first spring tenon sheathed with a first recovery spring is disposed between the continuous button and the inner block wall, and the first spring tenon passes the inner block wall.

According to one embodiment of the present invention, a base is formed at a bottom end defined at a front segment of the main body, an accommodation space allowing the battery module to be disposed is formed in the base; wherein the battery module includes a battery case allowing a plurality of batteries to be disposed, and a case cover used to open or close a bottom opening of the battery case; or the battery module includes a rechargeable battery.

According to one embodiment of the present invention, the igniting device further includes an ignition safety button, a push button at a top end of the ignition safety button is protruded from a front slide slot located at a front end of the opening, a second recovery spring is disposed between a front end of a seat at a bottom end of the ignition safety button and a front block wall inside the front slide slot, wherein a second spring tenon sheathed with the second recovery spring is protruded from a front end of the seat, the second spring tenon passes the front block wall; and a rear block sheet of the seat abuts against a flange protruded from the ignition switch, thus an interfering effect generated by the ignition safety button is applied to the ignition switch, and a pressing action is unable to be processed.

According to one embodiment of the present invention, the flame ejecting mechanism includes a fixed pipe made of a metal material, one end of the fixed pipe has a fuel gas inlet allowing the gas ejecting nozzle to be inserted, at least one air inlet hole is formed at a front end of the fuel gas inlet, the at least one air inlet hole is in communication with an inner mixing pipe formed inside the fixed pipe, air is driven to enter the at least one air inlet hole after the fuel gas being ejected out from the gas ejecting nozzle, the fuel gas and the air are both introduced into the inner mixing pipe to form a mixed fuel gas, and the mixed fuel gas is ejected out from the flame ejecting nozzle connected to a downstream end of the inner mixing pipe.

According to one embodiment of the present invention, an outer side of the inner mixing pipe is disposed with a connection part allowing the flame ejecting pipe to be connected; when being assembled, at least one connection member respectively passes a pipe hole correspondingly formed on the flame ejecting pipe so as to be connected to the connection part, thus the flame ejecting pipe and the fixed pipe are combined as one piece.

According to one embodiment of the present invention, the flame ejecting nozzle is disposed in a heat insulating member made of a ceramic material, the flame ejecting pipe encloses the heat insulating member; the conducting wire passes the heat insulating member, and one free end of the conducting wire and the flame ejecting nozzle are spaced apart, so that the high static voltage is transferred to ignite the mixed fuel gas ejected out from the flame ejecting nozzle; one free end of the electricity return wire is connected to a distal hole formed on the fixed pipe, so that an electric loop is established by the piezoelectric device, the conducting wire, the fixed pipe and the electricity return wire.

According to one embodiment of the present invention, the combustion assisting device includes the battery module, the electric motor and the impeller, the combustion assisting device further includes a wind cover, one side of the wind cover is radially protruded with a housing sheathing the electric motor, and another side thereof is formed with an impeller chamber allowing the impeller to be disposed, wherein an output shaft of the electric motor enters the impeller chamber to be connected to the impeller, a neck pipe extended from the impeller chamber and a connection ring connected to one free end of the neck pipe are provided, and the connection ring is connected to the air blowing pipe.

According to one embodiment of the present invention, a partition sheet is connected to a rear end of the wind cover, the partition sheet includes a conducting fixed column, and a support column spaced apart from the conducting fixed column and used for a conducting elastic member to sleeve thereon, wherein an elastic connection arm is protruded from the conducting elastic member towards the conducting fixed column, thus a circuit switch is formed by the conducting elastic member and the conducting fixed column.

According to one embodiment of the present invention, the conducting elastic member is controlled by the fan switch, and one side of the fan switch where the front tenon is located is adjacently disposed with a press member abutting against the elastic connection arm.

According to one embodiment of the present invention, a pair of first guide rails are disposed at two sides of the fan switch, the pair of first guide rails are disposed in a pair of first guide slots located below the rear slide slot and oppositely disposed, so that the fan switch is enabled to move in the rear slide slot.

According to one embodiment of the present invention, a hollow slot is formed at a central area of the fan switch, and the hollow slot is integrally connected to the fan safety button, the fan safety button includes an elastic supporter connected to the fan switch, a convex button is protruded from a front end of the elastic supporter, a lock bolt is radially protruded from the convex button, a lock slot allowing the lock bolt to be disposed is radially formed in the rear slide slot at a location corresponding to the lock bolt, so that an interfering effect is provided to lock bolt by the lock slot, and the fan switch is unable to be forwardly pushed to form a locking status.

According to one embodiment of the present invention, the fan switch further includes a push sheet inserted on a top surface of the fan switch, adjacent surfaces of the push sheet and the fan switch are oppositely formed an insertion tenon and an insertion slot capable of being mutually inserted, the push sheet has a penetrated hole allowing the convex button to penetrate and arranged at a location corresponding to the convex button, so that the push sheet drives the fan switch to simultaneously move.

According to one embodiment of the present invention, a pair of second guide rails are disposed at two sides of the push sheet, the pair of second guide rails are disposed in a pair of second guide slots located in the rear slide slot and oppositely disposed, so that the push sheet and the fan switch are enabled to move in the rear slide slot.

According to one embodiment of the present invention, a pair of slide tenons parallel to each other are disposed at two sides defined on a bottom surface of the push sheet and the pair of slide tenons are crossly arranged on a bottom wall of the rear slide slot.

To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and performance, we use preferred embodiments together with the accompanying drawings for the detailed description of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the gas combustor according to the present invention;

FIG. 2 is a perspective exploded view showing the igniting device of the gas combustor according to the present invention;

FIG. 3 is a perspective exploded view showing the combustion assisting device of the gas combustor according to the present invention;

FIG. 4 is a cross sectional view taken along an A-A dashed line of FIG. 1 to show a non-operating status of the ignition switch, the ignition safety button, the fan switch and the fan safety button;

FIG. 5 is a cross sectional view showing the continuous button of the igniting device not being pressed and the ignition switch according to the present invention;

FIG. 6 is a cross sectional view showing the igniting device being unlocked, the ignition switch being pressed for supplying fuel gas according to the present invention;

FIG. 7 is a cross sectional view showing the continuous button of the igniting device being pressed to form a locking status to the ignition switch according to the present invention;

FIG. 8 is a schematic view showing the fuel gas being ignited to generate flame at an opening located at the downstream end of the igniting device after the igniting device of FIG. 6 and FIG. 7 being operated according to the present invention;

FIG. 9a is a perspective exploded view showing the fan switch and the fan safety button of the combustion assisting device according to the present invention;

FIG. 9b is another perspective exploded view showing the fan switch and the fan safety button of the combustion assisting device according to the present invention;

FIG. 10 is a cross sectional view taken along a B-B dashed line of FIG. 1 to show the fan switch and the fan safety button being disposed in the control part;

FIG. 11 is a cross sectional view showing the fan switch and the fan safety button being disposed being unlocked according to the present invention;

FIG. 12 is a cross sectional view showing the fan switch and the fan safety button being connected to the power source cording to the present invention; and

FIG. 13 is a schematic view showing the airflow being blown out from an opening located at the downstream end of the combustion assisting device after the combustion assisting device of FIG. 11 and FIG. 12 being operated according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer from FIG. 1 to FIG. 13, the present invention provides a gas combustor including a main body 1, an igniting device 2 and a combustion assisting device 3.

As shown in FIG. 1, the main body 1 is formed with a manner of a left shell 11 and a right shell 12 being engaged, so that the gas combustor is configured as a long rod member. As shown in figures, a handgrip 13 allowing a user to hold with single hand is formed at a rear segment of the main body 1. A base 14 is formed at a bottom end defined at a front segment of the main body 1. As shown in FIG. 2 and FIG. 3, an accommodation space 141 is formed in the base 14. A battery module 31 of the combustion assisting device 3 is disposed in the accommodation space 141. According to one embodiment, the battery module 31 includes a battery case 311 and a case cover 312 used to open or close a bottom opening of the battery case 311. A plurality of dry batteries are disposed in the battery case 311 to provide a require driving power to an electric motor 32, such as a motor, to drive an impeller 33 to be operated. According to another embodiment, the battery module 31 includes a rechargeable battery. The rechargeable battery is used to provide the required power to the electric motor 32 to drive the impeller 33 to be operated.

A control part 15 is disposed at a top end defined at the front segment of the main body 1. The control part 15 allows an ignition switch 23, an ignition safety button 26 and a continuous button 25 of the igniting device 2, and a fan switch 35 and a fan safety button 36 of the combustion assisting device 3 to be disposed, so that the igniting device 2 and the combustion assisting device 3 are easily controlled.

Moreover, a first pipe port 16 allowing a flame ejecting pipe 28 to be protruded and a second pipe port 17 allowing an air conveying pipe 38 to be protruded are adjacently disposed at a front end of the main body 1, so that a flame generated by the igniting device 2 is ejected out from an outlet of the flame ejecting pipe 28, and an airflow generated by the combustion assisting device 3 is blown out from an outlet of the air flowing pipe 38.

A plurality of air passing slots 111 are disposed in one of the shells, such as the left shell 11, at locations corresponding to the impeller 33 for making air easily flow in, and the air is blown out from the outlet of the air blowing pipe 38 after the operations of the impeller 33.

Please refer from FIG. 1 to FIG. 8, the igniting device 2 includes a gas storage tank 21 disposed in the handgrip 13. The gas storage tank 21 is used to allow liquid gas to be stored. A conventional filling nozzle 211 is disposed at a rear end of the gas storage tank 21 for easily replenishing the liquid gas (defined as a fuel).

A fuel gas supplying mechanism 22 is disposed at a front end of the gas storage tank 21. The fuel gas supplying mechanism 22 is defined as a conventional mechanism and includes a gas discharging valve 221 disposed at the front end of the gas storage tank 21, a gas conveying soft pipe 222 having an upstream end thereof sheathed with the gas discharging valve 221, a gas ejecting nozzle 223 disposed at a downstream end of the gas conveying soft pipe 222, and a gas discharging press plate 224 having one end thereof sheathed with the gas discharging valve 221. The gas discharging press plate 224 is pivotally connected to a pivotal shaft 121 disposed at a bottom end defined inside the control part 15.

For regulating the gas supplying amount of the gas discharging valve 221, a regulation ring 225 is further sheathed with the gas discharging valve 221. A pull rod 226 is laterally protruded from the regulation ring 225. The pull rod 226 passes an elongated regulation slot 122 preformed in the right shell 12 for allowing the pull rod 226 to be easily pulled and operated, so that the regulation ring 225 simultaneously drives the gas discharging valve 221 to be rotated to regulate the supplying amount of the fuel gas.

A press part 231 disposed at a top end of the ignition switch 23 is radially protruded from an opening 151 of the control part 15. A piezoelectric device 24 is sheathed between a chamber 223 at one side of the ignition switch 23 and a bottom block wall 152 inside the control part 15. As shown in FIG. 6, when the press part 231 of the ignition switch 23 is pressed, a head part 241 at a top end of the piezoelectric device 24 is compressed by the ignition switch 23, so that the generated high static voltage is transferred by a conducting wire 242 which is laterally protruded. An electricity return wire 243 is connected to a bottom end of the piezoelectric device 24 and laterally protruded. As such, when the press part 231 of the ignition switch 23 is pressed, another end of the gas discharging press plate 224 is triggered by the ignition switch 23 to generate rotations, thus a leverage effect is generated by the gas discharging press plate 224 to pull out the gas discharging valve 221 for forming an opened fuel gas supplying status. The liquid gas in the gas storage tank 21 is vaporized to enter the gas conveying soft pipe 222 via the gas discharging valve 221 and then rapidly ejected out from the gas ejecting nozzle 223, and the ejected gas enters a flame ejecting mechanism 27.

The gas combustor further includes a continuous button 25, as shown in FIG. 2 and FIG. 5. The continuous button 25 is sheathed with a button hole 112 radially formed in the left shell 11. A periphery of the continuous button 25 is inwardly and radially protruded with a block tenon 251 having a buckle slot 252, and at least two support arms 253. The block tenon 251 and the at least two support arms 253 pass an inner block wall 113 formed in the button hole 112, and a hook part 254 of the at least two support arms 253 respectively forms a block effect with a corresponding inner block hole 114, so that the continuous button 25 is prevented from being released from the button hole 112. Moreover, a first recovery spring 255 is disposed between the continuous button 25 and the inner block wall 113. A first spring tenon 256 sheathed with the first recovery spring 255 is protruded in the continuous button 25. The first spring tenon 256 passes the inner block wall 113 to make the continuous button 25 smoothly compress the first recovery spring 255, thus the first recovery spring 255 is enabled to store energy.

Furthermore, a buckle hook 233 buckled with the buckle slot 252 is formed on the ignition switch 23 at a location corresponding to the buckle slot 252. As shown in FIG. 7, when the ignition switch 23 is in a pressed status, the user presses the continuous switch 25 to compress the first recovery spring 255, the user stops pressing the ignition switch 23, and an interfering status is formed between the buckle slot 252 and the buckle hook 233, so that the ignition witch 23 is unable to return to an initial position, and the ignition switch 23 continuously presses the gas discharging press plate 224, the gas discharging valve 221 is continuously kept to be in the fuel gas supplying status to avoid an inconvenient situation of the user being required to continuously press the ignition switch 23.

Especially, for enhancing the operation safety of the gas combustor, the gas combustor further includes the aforesaid ignition safety button 26. A push button 261 at a top end of the ignition safety button 26 is radially protruded from a front slide slot 153 located at a front end of the opening 151. A second recovery spring 263 is disposed between a front end of a seat 262 at a bottom end of the ignition safety button 26 and a front block wall 154 inside the front slide slot 153. A second spring tenon 264 sheathed with the second recovery spring 263 is protruded from a front end of the seat 262. The second spring tenon 264 passes the front block wall 154 to make the seat 262 smoothly compress the second recovery spring 263, thus the second recovery spring 263 is enabled to store energy. A rear block sheet 265 of the seat 262 abuts against a flange 234 axially protruded from the ignition switch 23, thus an interfering effect generated by the ignition safety button 26 is applied to the ignition switch 23, and the pressing action is unable to be processed (as shown in FIG. 4). As such, the unlocking difficulty of the ignition safety button 26 is enhanced, and children are prevented from directly pressing the ignition switch 23 to lower the possibility of causing a fire accident.

The flame ejecting mechanism 27 includes a fixed pipe 271 made of a metal material. One end of the fixed pipe 271 has a fuel gas inlet 272 allowing the gas ejecting nozzle 233 to be inserted. At least one air inlet hole 273 is radially formed at a front end of the fuel gas inlet 272. The at least one air inlet hole 273 is in communication with an inner mixing pipe 274 formed inside the fixed pipe 271. An outer side of the inner mixing pipe 274 is disposed with a connection part 275, such as a connection hole, allowing the flame ejecting pipe 28 to be connected. When being assembled, at least one conventional connection member 282, such as a screw, respectively passes a pipe hole 281 correspondingly formed on the flame ejecting pipe 28 so as to be connected to the connection part 275, thus the flame ejecting pipe 28 and the fixed pipe 271 are combined as one piece. Accordingly, air is driven to enter the at least one air inlet hole 273 after the fuel gas being ejected out from the gas ejecting nozzle 223, the fuel gas and the air are both introduced into the inner mixing pipe 274 to form a mixed fuel gas, the mixed fuel gas is ejected out from a flame ejecting nozzle 276 connected to a downstream end of the inner mixing pipe 274. The flame ejecting nozzle 276 is disposed in the flame ejecting pipe 28, so that the combusting flame is ejected out from an opening of the flame ejecting pipe 28.

Moreover, the flame ejecting nozzle 276 is disposed in a heat insulating member 277 made of a ceramic material. The flame ejecting pipe 28 encloses the heat insulating member 277. The conducting wire 242 passes the heat insulating member 277, and one free end of the conducting wire 242 and the flame ejecting nozzle 276 are spaced with a gap, so that the generated high static voltage ignites the mixed fuel gas ejected out from the flame ejecting nozzle 276. One free end, such as a distal hook 244, of the electricity return wire 243 is connected to, for example hooked, a distal hole 278 formed on the fixed pipe 271, so that an electric loop is established by the piezoelectric device 24, the conducting wire 242, the fixed pipe 271 and the electricity return wire 243.

As shown in FIG. 1, FIG. 3, FIG. 4, FIG. 6, FIG. 9a, FIG. 9b, FIG. 10, FIG. 11 and FIG. 12, the combustion assisting device 3 not only includes the battery module 31, the electric motor 32, such as the motor, and the impeller 33, but also includes a wind cover 34. One side of the wind cover 34 is radially protruded with a housing 341 sheathing the electric motor 32, and another side thereof is formed with an impeller chamber 342 allowing the impeller 33 to be disposed. An output shaft 321 of the electric motor 32 enters the impeller chamber 342 to be connected to the impeller 33. A neck pipe 343 axially extended from the impeller chamber 342 and a connection ring 344 connected to one free end of the neck pipe 343 are provided. The connection ring 344 is connected to (for example buckled) the air blowing pipe 38.

Moreover, a partition sheet 345 is connected to a rear end of the wind cover 34. The partition sheet 345 includes a conducting fixed column 346, and a support column 349 spaced apart from the conducting fixed column 346 and allowing a conducting elastic member 347 to be sheathed and positioned. An elastic connection arm 348 is protruded from the conducting elastic member 347, such as a torsion spring, towards the conducting fixed column 346. A serial connecting circuit is formed by the battery module 31, the electric motor 32, the conducting fixed column 346 and the conducting elastic member 347 having the elastic connection arm 348, thus a circuit switch is formed by the conducting elastic member 347 and the conducting fixed column 346. In other words, the elastic connection arm 348 of the conducting elastic member 347 contacts with the conducting fixed column 346 to form a power connection. On the other hand, the power is shut down when the elastic connection arm 348 of the conducting elastic member 347 is separated from the conducting fixed column 346.

The conducting elastic member 347 is controlled by the fan switch 35, and the fan switch 35 is disposed in a rear slide slot 155 located at a rear end of the opening 151. As shown in FIG. 9a and FIG. 9b, a front tenon 351 and a press member 352 abutting against the elastic connection arm 348 are protruded from a front end of the fan switch 35 and adjacently arranged. In actual practices, the press member 352 is preferably to be in a reversed-V-shaped slot to allow the elastic connection arm 348 to perform an unbiased counterclockwise movement, so that a contacted power supplying status is ensured to be formed by the elastic connection arm 348 and the conducting fixed column 346.

Moreover, a pair of first guide rails 353 are disposed at two sides of the fan switch 35. The pair of first guide rails 353 are disposed in a pair of first guide slots 156 located below the rear slide slot 155 and oppositely disposed as shown in FIG. 10, so that the fan switch 35 is able to axially move in the rear slide slot 155. When the ignition switch 23 is pressed to be in the operating status, if the fan switch 35 is forwardly pushed in the rear slide slot 155, the front tenon 351 contacts with a rear block member 235 protruded from a rear end of the ignition switch 23, so as to form an interfering effect (as shown in FIG. 6). In other words, the ignition switch 23 is in the operating status, the fan switch 35 is unable to be actuated. As such, the ignition switch 23 and the fan switch 35 cannot be simultaneously operated, and the ignition switch 23 and the fan switch 35 can surely not be operated at the same time.

Moreover, a hollow slot 354 is formed at a central area of the fan switch 35, and the hollow slot 354 is integrally connected to the fan safety button 36. The fan safety button 36 includes a U-shaped or an L-shaped elastic supporter 361 connected to the fan switch 35. A convex button 362 is protruded from a front end of the elastic supporter 361. A lock bolt 363 is radially protruded from the convex button 362. A lock slot 157 allowing the lock bolt 363 to be disposed is radially formed in the rear slide slot 155 at a location corresponding to the lock bolt 363, so that an interfering effect is provided to lock bolt 363 by the lock slot 157 (as shown in FIG. 4 and FIG. 6), and the fan switch 35 is unable to be forwardly pushed to form a locking status.

When the ignition switch 23 is not pressed to be in a non-operating status, the fan switch 35 is desired to be operated, the user only needs to press the convex button 362 to make the lock bolt 363 be released from the lock slot 157 (as shown in FIG. 11), thus the fan switch 35 is able to be forwardly pushed in the rear slide slot 155, and a staggering status is formed by the front button 351 and the rear block member 235 (as shown in FIG. 12). As such, the press member 352 pushes the elastic connection arm 348 of the conducting elastic member 347 in the counterclockwise direction to make the elastic connection arm 348 be in communication with the conducting fixed column 346 to form the power connecting status.

Moreover, the fan switch 35 further includes a push sheet 37 inserted on a top surface of the fan switch 35. Adjacent surfaces of the push sheet 37 and the fan switch 35 are oppositely formed an insertion tenon 371 and an insertion slot 355 capable of being mutually inserted. The push sheet 37 has a penetrated hole 372 allowing the convex button 362 to penetrate and arranged at a location corresponding to the convex button 362, so that the push sheet 37 drives the fan switch 35 to simultaneously and axially move.

Moreover, a pair of second guide rails 373 are disposed at two sides of the push sheet 37. The pair of second guide rails 373 are disposed in a pair of second guide slots 158 located in the rear slide slot 155 and oppositely disposed as shown in FIG. 10, so that the push sheet 37 and the fan switch 35 are able to axially move in the rear slide slot 155.

Moreover, a pair of slide tenons 374 parallel to each other are disposed at two sides defined on a bottom surface of the push sheet 37 and the pair of slide tenons 374 are crossly arranged on a bottom wall of the rear slide slot 155, so that a friction force is decreased during the pushing process.

Please refer to FIG. 1, FIG. 2, and FIG. 4 through FIG. 8, when the igniting device 2 is used to ignite objects, such as charcoals, the user only needs use single hand, such as the right hand, to hold the handgrip 13. And one finger of the other hand, such as the left hand, pushes the push button 261 to forwardly and axially slide in the front slide slot 153, the second recovery spring 263 is compressed to make the flange 234 be released from an abutting relation relative to the rear block sheet 265, thus an unlocking status is formed. At this moment, the user can use the thumb of the right hand to press the ignition switch 23 to trigger the fuel gas supplying mechanism 22 and the piezoelectric device 24 to correspondingly supplying the fuel gas and transferring the high static voltage to the flame ejecting mechanism 27, so that the mixed fuel gas ejected out from the flam ejecting nozzle 276 is ignited by the high static voltage, and the generated flame is ejected out from the opening of the flame ejecting pipe 28 (as shown in FIG. 8), thus the objects to be ignited are ignited.

Subsequently, the user uses one finger of the left hand to press the continuous button 25 to generate an interfering action to the ignition switch 23, so that the ignition switch 23 is unable to be returned to an initial position, and the fuel gas supplying mechanism 22 is kept to be in the gas supplying status.

At this moment, if the fan switch 35 is forwardly pushed in the rear slide slot 155, the fan switch 35 (as shown in FIG. 6) is unable to be smoothly pushed due to the blocking and the interfering effect formed by the front tenon 351 and the rear block member 235 of the ignition switch 23.

After the objects to be ignited have been ignited, the user only needs to press the continuous button 25 again to make the buckle slot 252 be released from the buckle hook 233, and the first recovery spring 255 is stretched for releasing energy to make the continuous button 25 be recovered to the initial position where the continuous button 25 is not pressed, the ignition switch 23 is not longer interfered by the continuous button 25, and the ignition switch 23 is able to be recovered to the unpressed non-operating status through a recovering effect provided by the head part 241 of the piezoelectric device 24. The gas discharging press plate 224 is not subjected to the action force of the ignition switch 23 and is retracted to the initial position where the fuel gas does not supply through the elastic recovery force of the gas discharging valve 221, and the gas discharging press plate 224 is driven to a position as shown in FIG. 4, thus the fuel gas supply of the gas discharging valve 221 is terminated.

At the same time of the ignition switch 23 being recovered to the initial position where the ignition switch 23 not being pressed, the rear block sheet 265 of the ignition safety button 26 does not abut against the flange 234 of the ignition switch 23, the second recovery spring 263 is stretched for releasing energy to make the ignition safety button 26 be recovered to an initial position where not being operated, the rear block sheet 265 abuts against the flange 234 to form an automatic locking status (as shown in FIG. 4).

Please refer to FIG. 1, FIG. 3, FIG. 4, FIG. 9a, FIG. 9b, FIG. 10, FIG. 11, FIG. 12 and FIG. 13, when the combustion assisting device 3 is used to supply oxygen to the objects to be ignited to increase a combusting effect, the user firstly confirms the ignition switch 23 being in the position of not being pressed (as shown in FIG. 4). And then, the right hand of the user presses the convex button 362 to make the lock bolt 363 below the convex button 362 be released from the lock slot 157, thus the fan switch 35 is unlocked (as shown in FIG. 11).

Subsequently, the push sheet 37 is pushed to simultaneously drive the fan switch 35 to axially move, the press member 352 pushes the elastic connection arm 348 of the conducting elastic member 347 in the counterclockwise direction, and the elastic connection arm 348 is in communication with the conducting fixed column 346 to form the power connecting status (as shown in FIG. 12). At this moment, the power is supplied by the battery module 31 to the electric motor 32 to make the output shaft 321 and the impeller 33 be simultaneously operated, the air generated by the impeller 33 disposed in the impeller chamber 342 of the wind cover 34 passes the neck pipe 343, the air is blown out from the opening of the air conveying pipe 38 (as shown in FIG. 13), thus a combustion assisting effect is provided to the objects to be ignited.

Based on what has been disclosed above, advantages achieved by the present invention are as follows. The flame generated by the igniting device is ejected out from the flame ejecting pipe, the airflow generated by the combustion assisting device is blown out from the air conveying pipe, the flame ejecting pipe and the air conveying pipe are provided with a double pipe design, so that a shunting effect is provided to the flame and the airflow, thus an igniting and combustion assisting function is provided.

Moreover, the igniting device includes the ignition switch capable of igniting the fuel gas and generating the flame, the combustion assisting device includes the fan switch capable of actuating the electric motor and driving the impeller to operate for generating the airflow. When the ignition switch is operated, the fan switch is unable to be operated. On the other hand, when the fan switch is operated, the ignition switch cannot be operated, thus a situation of both of the fan switch and the ignition switch being operated is avoided.

Moreover, the ignition switch and the fan switch respectively have an ignition safety button and a fan safety button for preventing the unintentional and incidental operations, thus the operation safety is greatly increased. Accordingly, the applicable field of the gas combustor with the igniting and combustion assisting function of the present invention can be effectively expanded.

While the invention has been described by way of example and in terms of preferred embodiments, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.