CN221375736U - Automatic kerosene lighter - Google Patents

Abstract

The utility model provides an automatic kerosene lighter, and belongs to the technical field of lighters. The machine comprises a machine body, wherein the upper end of the machine body is hinged with an organic cover through a hinge shaft, a coal oil cavity is arranged in the machine body, one side, far away from the hinge shaft, in the machine body is provided with a combustion head, the other end of the combustion head stretches into the coal oil cavity, one side, close to the hinge shaft, of the combustion head is provided with a grinding wheel which is rotationally connected onto the machine body, and a flint is arranged below the grinding wheel. The automatic ignition can be realized only by pressing the button, the manual friction is not needed to rotate the grinding wheel for ignition, and the operation is convenient; the longitudinal height of the flint is adjustable, the flint does not need to be replaced, the operation is convenient, and the service life is prolonged; the locking and unlocking operations between the cover and the machine body are convenient.

Description

Automatic kerosene lighter

Technical Field

The utility model belongs to the technical field of lighters and relates to an automatic kerosene lighter.

Background technique

Kerosene lighters are small fire-making devices, which are mainly used for making fire, smoking, cooking and other fire-making. Existing kerosene lighters are equipped with a protective flip cover. When using it for lighting, the flip cover is manually lifted, and then the grinding wheel is manually rotated to make the grinding wheel and the flint rub to generate sparks for igniting the combustion head. When operating the ignition, the grinding wheel needs to be manually and quickly rubbed and turned, which makes the ignition operation troublesome.

Utility Model Content

The purpose of the utility model is to provide an automatic kerosene lighter in view of the above problems.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

An automatic kerosene lighter comprises a body, wherein the upper end of the body is hinged to a cover via a hinge shaft, a kerosene chamber is arranged in the body, a combustion head is arranged on the side of the body away from the hinge shaft, the other end of the combustion head extends into the kerosene chamber, a grinding wheel rotatably connected to the body is arranged on the side of the combustion head near the hinge shaft, a flint is arranged below the grinding wheel, and the characterised in that the grinding wheel is provided with a latching tooth structure which rotates synchronously with the grinding wheel, a pull rod which can always abut against the outer peripheral surface of the latching tooth structure is hinged in the cover, and when the cover is opened, the pull rod can pull the latching tooth structure to rotate and drive the grinding wheel to rotate to complete the ignition.

When performing the ignition operation, you only need to open the machine cover, and the pull rod will pull the tooth structure to rotate and drive the grinding wheel to rotate. The rotation of the grinding wheel and the friction with the flint will generate sparks to ignite the combustion head, realizing automatic ignition by opening the machine cover. There is no need to manually rub and rotate the grinding wheel, and the ignition operation is very convenient.

In the above-mentioned automatic kerosene lighter, a torsion spring is provided between the pull rod and the machine cover, and the torsion spring makes the pull rod always abut against the outer peripheral surface of the latching tooth structure, and the torsion spring makes the machine cover always have a tendency to open upward; a switch structure is provided between the body and the machine cover, which can lock the machine cover when the machine cover is closed on the body.

When the hood is flipped down, the torsion spring between the pull rod and the hood deforms to generate elastic force so that the pull rod always presses against the outer peripheral surface of the latch structure, and the hood always has a tendency to open upward. The switch structure between the body and the hood is used to lock the hood to the body, and the locked state of the hood can be released through the switch structure, so that the hood can be flipped up and opened.

In the above-mentioned automatic kerosene lighter, the latching tooth structure includes gears respectively arranged on both sides of the grinding wheel, and the gears have a plurality of latching teeth evenly distributed along the circumference of the gears. The latching teeth include a driving inclined surface abutting against the end of the pull rod, and the terminal end of the driving inclined surface is provided with a latching groove for the pull rod to latch. When the machine cover is flipped down, the pull rod moves along the driving inclined surface into the latching groove and continues to move into the adjacent latching groove as the machine cover is continuously flipped down. When the machine cover is flipped up, since the pull rod is embedded in the latching groove, the pull rod drives the gear to rotate and drives the grinding wheel to rotate at the same time to achieve ignition.

When the machine cover flips down, the pull rod moves along the driving inclined surface to the snap-fit groove at the terminal end of the driving inclined surface, and continues to move to the adjacent snap-fit groove as the machine cover continues to flip down. During this process, the pull rod presses against the driving inclined surface to drive the gear and the grinding wheel to rotate accordingly. Under the action of the elastic force of the torsion spring, the pull rod always rests on the driving inclined surface. When the machine cover flips upward, the pull rod is embedded in the snap-fit groove to form a limit to drive the gear to rotate while driving the grinding wheel to rotate to achieve automatic ignition. The ignition operation is convenient.

In the above-mentioned automatic kerosene lighter, an arc-shaped guide portion is provided at the connection between the top of the engagement groove and the terminal end of the driving slope.

When the pull rod is pressed against the driving inclined surface and moves along the driving inclined surface, the arc-shaped guide portion at the connection between the terminal end of the driving inclined surface and the top of the buckling groove facilitates the pull rod to slide into the buckling groove.

In the above-mentioned automatic kerosene lighter, the pull rod comprises a rod body, a buckling portion is provided at the top end of the rod body, and the length of the buckling portion is greater than the distance between the two gears.

When the engine cover is turned up, the buckle part at the top of the rod body can be embedded in the buckle groove to form a limited fit and drive the gear to rotate and drive the grinding wheel to rotate to achieve ignition.

In the above-mentioned automatic kerosene lighter, fixed seats are respectively provided on both sides of the top of the body, the grinding wheel and the gears fixedly connected to both sides of the grinding wheel are rotatably connected between the two fixed seats through a rotating shaft, and a pull rod limiting structure is provided on the fixed seat.

The fixed seat is used to position and install the grinding wheel and the gear. The pull rod limiting structure is used to limit the opening distance of the machine cover on the one hand, and to ensure that the pull rod does not separate from the outer peripheral surface of the tooth structure on the other hand.

In the above-mentioned automatic kerosene lighter, the pull rod limiting structure includes a positioning slot arranged on the side of the fixed seat near the hinge axis, the groove shape of the positioning slot is adapted to the groove shape of the buckling slot, and a guide arc surface is also provided on the side of the fixed seat near the hinge axis, and the buckling part of the pull rod can slide into the positioning slot along the guide of the guide arc surface.

The buckle part is embedded in the positioning slot to limit the initial position of the pull rod. When the hood is flipped down, the buckle part moves along the driving inclined surfaces on both sides. When the pull rod needs to be debugged, the guide arc surface facilitates the buckle part on the pull rod to slide into the positioning slot.

In the above-mentioned automatic kerosene lighter, a hinge seat is provided at the end of the rod body, and the hinge seat is hinged in the machine cover through a rod body hinge shaft passing through the hinge seat. A torsion spring installation groove is provided on the hinge seat, and a torsion spring sleeved on the rod body hinge shaft is provided in the torsion spring installation groove. The starting end and the end portion of the torsion spring on both sides are respectively abutted against the inner top surface of the machine cover and the end of the rod body.

The torsion spring installation groove on the hinge seat and the rod body hinge shaft penetrating the hinge seat are used for positioning and installing the torsion spring, and the torsion spring is not easy to shift and fall off.

In the above-mentioned automatic kerosene lighter, the flint is connected to a longitudinal positioning structure, and the longitudinal positioning structure includes a positioning spring mounting tube longitudinally arranged in the body, and an adjusting spring is arranged in the positioning spring mounting tube. The top of the adjusting spring is connected to the bottom of the flint, and the bottom of the adjusting spring abuts against the positioning bolt threadedly connected to the bottom of the body. A positioning column is provided on the top of the adjusting bolt, and the bottom end of the adjusting spring is sleeved on the positioning column and abuts against the top of the adjusting bolt.

When the top of the flint is worn and cannot contact the grinding wheel, it is only necessary to turn the adjusting bolt to move it upward. During the upward movement of the adjusting bolt, the adjusting spring is lifted and compressed to drive the flint to move upward and contact the bottom of the grinding wheel.

In the above-mentioned automatic kerosene lighter, the switch structure includes a flip cover hook arranged on the inner wall of the cover away from the hinge axis side, a buckle groove plate matching with the flip cover hook is provided on the body, a movable plate is connected to the side of the buckle groove plate, a slide groove is provided on the movable plate, a positioning plate is provided in the body, the movable plate is slidably connected to the positioning plate, the combustion head is fixed to the positioning plate by a mounting seat passing through the slide groove, the bottom of the mounting seat is abutted against the top of the movable plate, a button passing through the body is provided on the buckle groove plate, and a reset spring is provided between the slide groove and the mounting seat.

When the hood is flipped down, the flip cover hook on the inner side wall of the hood cooperates with the buckle groove plate on the body to achieve locking. When ignition is needed, press the button to drive the buckle groove plate to move inward, the buckle cooperation between the buckle groove plate and the flip cover hook is released, the lock is released, and the moving plate slides on the positioning plate along the inward movement of the buckle groove plate. The positioning plate plays the role of fixing the moving plate, and the slide groove plays the role of giving way and sliding. The locking and unlocking operations between the hood and the body are convenient.

Compared with the existing technology, the advantages of the utility model are: 1. Automatic ignition can be achieved by simply pressing a button, without the need to manually rub and rotate the grinding wheel to ignite, and the operation is convenient. 2. The longitudinal height of the flint can be adjusted, and there is no need to replace the flint, which is convenient to operate and prolongs the service life. 3. The locking and unlocking operations between the machine cover and the machine body are convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure provided by the utility model;

FIG2 is a side view provided by the utility model;

Figure 3 is a cross-sectional view provided by the utility model;

FIG4 is a schematic diagram of the structure of a fixing base;

FIG. 5 is a schematic diagram of the structure of a gear.

In the figure, the body 1, the hinge shaft 2, the machine cover 3, the combustion head 4, the grinding wheel 5, the latch structure 6, the pull rod 7, the torsion spring 8, the switch structure 9, the gear 10, the latch 11, the driving inclined surface 12, the buckling groove 13, the arc guide part 14, the rod body 15, the buckling part 16, the fixed seat 17, the rotating shaft 18, the pull rod limiting structure 19, the positioning slot 20, the guide arc surface 21, the hinge seat 22, the starting end 23, the terminal part 24, the flint 25, the longitudinal adjustment structure 27, the adjustment spring mounting tube 28, the adjustment spring 29, the adjustment bolt 30, the positioning column 31, the flip cover hook 32, the buckle slot plate 33, the moving plate 34, the slide groove 35, the positioning plate 36, the mounting seat 37, and the button 38.

Detailed ways

As shown in Figures 1 to 5, an automatic kerosene lighter includes a body 1, the upper end of the body 1 is hinged with a cover 3 through a hinge shaft 2, a kerosene chamber is provided in the body 1, a combustion head 4 is provided on the side of the body 1 away from the hinge shaft, the other end of the combustion head 4 extends into the kerosene chamber, a grinding wheel 5 rotatably connected to the body 1 is provided on the side of the combustion head 4 near the hinge shaft 2, a flint 25 is provided below the grinding wheel 5, and the characteristic is that the grinding wheel 5 is provided with a tooth structure 6 that rotates synchronously with the grinding wheel, a pull rod 7 that can always abut against the outer peripheral surface of the tooth structure 6 is hinged in the cover 3, and when the cover 3 is opened, the pull rod 7 can pull the tooth structure 6 to rotate and drive the grinding wheel 5 to rotate to complete the ignition.

In the utility model, when performing the ignition operation, it is only necessary to open the machine cover 3, and the pull rod 7 will pull the latching structure 6 to rotate and drive the grinding wheel 5 to rotate. The rotation of the grinding wheel 5 and the friction with the flint 25 will generate sparks to ignite the combustion head 4, so that automatic ignition can be achieved by opening the machine cover 3, and there is no need to manually rub and rotate the grinding wheel, and the ignition operation is very convenient.

Specifically, in combination with Figures 1 to 3, a torsion spring 8 is provided between the pull rod 7 and the machine cover 3, and the torsion spring 8 makes the pull rod 7 always abut against the outer peripheral surface of the latch structure 6, and the torsion spring 8 makes the machine cover 3 always have a tendency to open upward; a switch structure 9 is provided between the body 1 and the machine cover 3, which can lock the machine cover 3 when the machine cover 3 is closed on the body 1.

When the machine cover 3 is flipped down, the torsion spring 8 between the pull rod 7 and the machine cover 3 is deformed to generate elastic force so that the pull rod 7 always presses against the outer peripheral surface of the latch structure 6, and the machine cover 3 always has a tendency to open upward. The switch structure 9 between the machine body 1 and the machine cover 3 is used to lock the machine cover 3 on the machine body 1, and the locked state of the machine cover 3 can be released through the switch structure 9, so that the machine cover 3 can be flipped up and opened.

Specifically, in combination with Figures 1 to 5, the latching tooth structure 6 includes gears 10 respectively arranged on both sides of the grinding wheel 5, and the gear 10 has a plurality of latching teeth 11 evenly distributed along the circumference of the gear 10, and the latching teeth 11 include a driving inclined surface 12 abutting against the end of the pull rod 7, and the terminal end of the driving inclined surface 12 is provided with a latching groove 13 for the pull rod 7 to latch. When the machine cover 3 is flipped down, the pull rod 7 moves along the driving inclined surface 12 into the latching groove 13 and continues to move into the adjacent latching groove 13 as the machine cover 3 is continuously flipped down. When the machine cover is flipped up, since the pull rod 7 is embedded in the latching groove 13, the pull rod 7 drives the gear 10 to rotate and drives the grinding wheel 5 to rotate to achieve ignition.

When the machine cover 3 flips down, the pull rod 7 moves along the driving bevel 12 to the snap-fit groove 13 at the terminal end of the driving bevel 12, and continues to move to the adjacent snap-fit groove 13 as the machine cover 3 continues to flip down. During this process, the pull rod 7 presses against the driving bevel 12 to drive the gear 10 and the grinding wheel 5 to rotate accordingly. Under the action of the elastic force of the torsion spring 8, the pull rod 7 always rests on the driving bevel 12. When the machine cover 3 flips upward, the pull rod 7 is embedded in the snap-fit groove 13 to form a limit to drive the gear 10 to rotate while driving the grinding wheel 5 to rotate to achieve automatic ignition. The ignition operation is convenient.

Preferably, as shown in FIGS. 1 to 5 , an arc-shaped guide portion 14 is provided at the connection between the top of the locking groove 13 and the terminal end of the driving inclined surface 12 .

When the pull rod 7 is pressed against the driving inclined surface 12 and moves along the driving inclined surface 12 , the arc-shaped guide portion 14 at the connection between the terminal end of the driving inclined surface 12 and the top of the buckling groove 13 facilitates the pull rod 7 to slide into the buckling groove 13 .

Specifically, as shown in FIGS. 1 to 4 , the pull rod 7 includes a rod body 15 , a buckling portion 16 is provided at the top of the rod body 15 , and the length of the buckling portion 16 is greater than the distance between the two gears 10 .

When the buckle part 16 at the top of the rod body 15 is turned up, it can be embedded in the buckle groove 13 to form a limited fit and drive the gear 10 to rotate and drive the grinding wheel 5 to rotate to achieve ignition.

Specifically, as shown in Figures 1 to 4, fixed seats 17 are respectively provided on both sides of the top of the body 1, and the grinding wheel 5 and the gear 10 fixedly connected to both sides of the grinding wheel 5 are rotatably connected between the two fixed seats 17 through a rotating shaft 18. A pull rod limiting structure 19 is provided on the fixed seat 17.

The fixing seat 17 is used for positioning and installing the grinding wheel 5 and the gear 10 . The pull rod limiting structure 19 serves to limit the opening distance of the machine cover 3 on the one hand, and to ensure that the pull rod 7 does not separate from the outer peripheral surface of the latching tooth structure 6 on the other hand.

Specifically, in combination with Figures 1 to 4, the pull rod limiting structure 19 includes a positioning slot 20 arranged on the side of the fixed seat 17 near the hinge shaft 2, the groove shape of the positioning slot 20 is adapted to the groove shape of the snap-fit slot 13, and the fixed seat 17 is also provided with a guide arc surface 21 on the side near the hinge shaft 2, and the snap-fit portion 16 of the pull rod 7 can slide into the positioning slot 20 along the guidance of the guide arc surface 21.

The buckling portion 16 is embedded in the positioning slot 20 to limit the initial position of the pull rod 7. When the machine cover 3 is flipped down, the buckling portion 16 moves along the driving inclined surfaces 12 on both sides. When the pull rod 7 needs to be debugged, the guide arc surface 21 facilitates the buckling portion 16 on the pull rod 7 to slide into the positioning slot 20.

Preferably, in combination with Figure 3, a hinge seat 22 is provided at the end of the rod body 15, and the hinge seat 22 is hinged in the machine cover 3 through a rod body hinge shaft passing through the hinge seat 22. A torsion spring mounting groove is provided on the hinge seat 22, and a torsion spring 8 is provided in the torsion spring mounting groove and is sleeved on the rod body hinge shaft. The starting end 23 and the terminal end 24 at both sides of the torsion spring 8 are respectively abutted against the inner top surface of the machine cover 3 and the end of the rod body 15.

The torsion spring installation groove on the hinge seat 22 and the rod body hinge shaft passing through the hinge seat 22 are used to position and install the torsion spring 8, and the torsion spring is not easy to shift and fall off.

Preferably, in combination with what is shown in FIG3 , the flint 25 is connected to a longitudinal positioning structure 27, and the longitudinal positioning structure 27 comprises a positioning spring mounting tube 28 longitudinally arranged in the body 1, and a positioning spring 29 is arranged in the positioning spring mounting tube 28, and the top end of the positioning spring 29 is connected to the bottom end of the flint 25, and the bottom end of the positioning spring 29 abuts against a positioning bolt 30 threadedly connected to the bottom of the body 1, and a positioning column 31 is arranged on the top of the positioning bolt 30, and the bottom end of the positioning spring 29 is sleeved on the positioning column 31 and abuts against the top end of the positioning bolt 30.

When the top of the flint 25 is worn and cannot contact the grinding wheel 5, it is only necessary to rotate the adjusting bolt 30 to move the adjusting bolt 30 upward. During the upward movement of the adjusting bolt 30, the adjusting spring 29 is lifted and compressed to drive the flint 25 to move upward and contact the bottom of the grinding wheel 5.

Specifically, in combination with Figures 1 to 3, the switch structure 9 includes a flip cover hook 32 arranged on the inner wall of the cover 3 away from the hinge shaft 2, and the body 1 is provided with a buckle groove plate 33 that cooperates with the flip cover hook 32. The buckle groove plate 33 is connected to a movable plate 34 on the side, and a slide groove 35 is provided on the movable plate 34. A positioning plate 36 is provided in the body 1, and the movable plate 34 is slidably connected to the positioning plate 36. The burner head 4 is fixed to the positioning plate 36 by a mounting seat 37 passed through the slide groove 35, and the bottom of the mounting seat 37 is abutted against the top of the movable plate 34. The buckle groove plate 33 is provided with a button 38 passed through the body 1, and a return spring is provided between the slide groove 35 and the mounting seat 37.

When the machine cover 3 is flipped down, the flip cover hook 32 on the inner side wall of the machine cover 3 is locked with the buckle groove plate 33 on the machine body 1. When ignition is needed, the button 38 is pressed to drive the buckle groove plate 33 to move inward, and the buckle cooperation between the buckle groove plate 33 and the flip cover hook 32 is released, and the lock is released. The movable plate 34 slides on the positioning plate 36 along the inward movement of the buckle groove plate 33. The positioning plate plays the role of fixing the movable plate 34, and the slide groove 35 plays the role of giving way and sliding. The locking and unlocking operations between the machine cover 3 and the machine body 1 are convenient.

The working principle of the utility model is that when performing the ignition operation, it is only necessary to open the machine cover 3, and the pull rod 7 will pull the latching structure 6 to rotate and drive the grinding wheel 5 to rotate, and the grinding wheel 5 rotates and rubs with the flint 25 to generate sparks to ignite the combustion head 4, so that automatic ignition can be achieved by opening the machine cover 3, and there is no need to manually rub and rotate the grinding wheel, and the ignition operation is very convenient;

The torsion spring 8 between the pull rod 7 and the cover 3 is deformed to generate elastic force during the process of the cover 3 being flipped down, so that the pull rod 7 always abuts against the outer peripheral surface of the latch structure 6, and the cover 3 always has a tendency to open upwards. The switch structure 9 between the body 1 and the cover 3 is used to lock the cover 3 on the body 1, and the locked state of the cover 3 can be released through the switch structure 9, so that the cover 3 is flipped up and opened;

When the machine cover 3 flips down, the pull rod 7 moves along the driving inclined surface 12 to the buckling groove 13 at the terminal end of the driving inclined surface 12, and continues to move into the adjacent buckling groove 13 as the machine cover 3 continues to flip down. In this process, the pull rod 7 presses the driving inclined surface 12 to drive the gear 10 and the grinding wheel 5 to rotate accordingly. The pull rod 7 always rests on the driving inclined surface 12 under the elastic force of the torsion spring 8. When the machine cover 3 flips up, the pull rod 7 is embedded in the buckling groove 13 to form a limit to drive the gear 10 to rotate and drive the grinding wheel 5 to rotate to realize automatic ignition, and the ignition operation is convenient;

When the pull rod 7 is pressed against the driving inclined surface 12 and moves along the driving inclined surface 12, the arc-shaped guide portion 14 at the connection between the terminal end of the driving inclined surface 12 and the top of the buckling groove 13 facilitates the pull rod 7 to slide into the buckling groove 13;

When the buckle part 16 at the top of the rod body 15 is turned up, it can be embedded in the buckle groove 13 to form a limited fit and drive the gear 10 to rotate and drive the grinding wheel 5 to rotate to achieve ignition;

The fixing seat 17 is used to position and install the grinding wheel 5 and the gear 10. The pull rod limiting structure 19 is used to limit the opening distance of the cover 3 on the one hand, and to ensure that the pull rod 7 does not separate from the outer peripheral surface of the locking tooth structure 6 on the other hand;

The buckle part 16 is embedded in the positioning slot 20 to limit the initial position of the pull rod 7. When the cover 3 is flipped down, the buckle part 16 moves along the driving inclined surfaces 12 on both sides. When the pull rod 7 needs to be debugged, the guide arc surface 21 facilitates the buckle part 16 on the pull rod 7 to slide into the positioning slot 20.

The torsion spring installation groove on the articulated seat 22 and the rod articulated shaft passing through the articulated seat 22 are used to position and install the torsion spring 8, and the torsion spring is not easy to shift and fall off;

When the top of the flint 25 is worn and cannot contact the grinding wheel 5, it is only necessary to rotate the adjusting bolt 30 to move the adjusting bolt 30 upward. During the upward movement of the adjusting bolt 30, the adjusting spring 29 is lifted and compressed to drive the flint 25 to move upward and contact the bottom of the grinding wheel 5.

When the machine cover 3 is flipped down, the flip cover hook 32 on the inner side wall of the machine cover 3 is locked with the buckle groove plate 33 on the machine body 1. When ignition is needed, the button 38 is pressed to drive the buckle groove plate 33 to move inward, and the buckle cooperation between the buckle groove plate 33 and the flip cover hook 32 is released, and the lock is released. The movable plate 34 slides on the positioning plate 36 along the inward movement of the buckle groove plate 33. The positioning plate plays the role of fixing the movable plate 34, and the slide groove 35 plays the role of giving way and sliding. The locking and unlocking operations between the machine cover 3 and the machine body 1 are convenient.

The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Although this article uses the body 1, hinge shaft 2, machine cover 3, combustion head 4, grinding wheel 5, latch structure 6, pull rod 7, torsion spring 8, switch structure 9, gear 10, latch 11, driving inclined surface 12, buckling groove 13, arc guide part 14, rod body 15, buckling part 16, fixed seat 17, rotating shaft 18, pull rod limiting structure 19, positioning slot 20, guide arc surface 21, hinge seat 22, starting end 23, terminal part 24, flint 25, longitudinal adjustment structure 27, adjustment spring mounting tube 28, adjustment spring 29, adjustment bolt 30, positioning column 31, flip cover hook 32, buckle slot plate 33, moving plate 34, slide slot 35, positioning plate 36, mounting seat 37, button 38 and the like more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims (10)

1. An automatic kerosene lighter, comprising a body (1), wherein the upper end of the body (1) is hingedly connected to a cover (3) via a hinge shaft (2), a kerosene chamber is arranged in the body (1), a combustion head (4) is arranged on the side of the body (1) away from the hinge shaft, the other end of the combustion head (4) extends into the kerosene chamber, a grinding wheel (5) rotatably connected to the body (1) is arranged on the side of the combustion head (4) near the hinge shaft (2), a flint (25) is arranged below the grinding wheel (5), characterized in that a latching structure (6) rotating synchronously with the grinding wheel is arranged on the grinding wheel (5), a pull rod (7) hingedly connected to the outer peripheral surface of the latching structure (6) is arranged in the cover (3), and when the cover (3) is opened, the pull rod (7) can pull the latching structure (6) to rotate and drive the grinding wheel (5) to rotate to complete the ignition. 2. The automatic kerosene lighter according to claim 1 is characterized in that a torsion spring (8) is provided between the pull rod (7) and the machine cover (3), the torsion spring (8) makes the pull rod (7) always abut against the outer peripheral surface of the latching tooth structure (6), and the torsion spring (8) makes the machine cover (3) always have a tendency to open upward; a switch structure (9) is provided between the machine body (1) and the machine cover (3) which can lock the machine cover (3) when the machine cover (3) is closed on the machine body (1). 3. The automatic kerosene lighter according to claim 2 is characterized in that the latching tooth structure (6) includes gears (10) respectively arranged on both sides of the grinding wheel (5), the gear (10) is evenly distributed with a plurality of latching teeth (11) along the circumference of the gear (10), the latching teeth (11) include a driving inclined surface (12) abutting against the end of the pull rod (7), and the terminal end of the driving inclined surface (12) is provided with a latching groove (13) for the pull rod (7) to be engaged, when the cover (3) is flipped down, the pull rod (7) moves along the driving inclined surface (12) into the latching groove (13) and continues to move into the adjacent latching groove (13) as the cover (3) is continuously flipped down, when the cover is flipped up, since the pull rod (7) is embedded in the latching groove (13), the pull rod (7) drives the gear (10) to rotate and drives the grinding wheel (5) to rotate to achieve ignition. 4. The automatic kerosene lighter according to claim 3, characterized in that an arc-shaped guide portion (14) is provided at the connection between the top of the snap-fit groove (13) and the terminal end of the driving inclined surface (12). 5. The automatic kerosene lighter according to claim 3 or 4, characterized in that the pull rod (7) comprises a rod body (15), a buckling portion (16) is provided at the top of the rod body (15), and the length of the buckling portion (16) is greater than the distance between the two gears (10). 6. The automatic kerosene lighter according to claim 3 is characterized in that fixed seats (17) are respectively provided on both sides of the top of the body (1), the grinding wheel (5) and the gear (10) fixedly connected to both sides of the grinding wheel (5) are rotatably connected between the two fixed seats (17) through a rotating shaft (18), and a pull rod limiting structure (19) is provided on the fixed seat (17). 7. The automatic kerosene lighter according to claim 6 is characterized in that the pull rod limiting structure (19) includes a positioning slot (20) arranged on the side of the fixed seat (17) near the hinge shaft (2), the groove shape of the positioning slot (20) is adapted to the groove shape of the snap-fit slot (13), and the side of the fixed seat (17) near the hinge shaft (2) is also provided with a guide arc surface (21), and the snap-fit portion (16) of the pull rod (7) can slide into the positioning slot (20) along the guidance of the guide arc surface (21). 8. The automatic kerosene lighter according to claim 5 is characterized in that a hinge seat (22) is provided at the end of the rod body (15), and the hinge seat (22) is hinged in the machine cover (3) through a rod body hinge shaft passing through the hinge seat (22), and a torsion spring installation groove is provided on the hinge seat (22), and a torsion spring (8) sleeved on the rod body hinge shaft is provided in the torsion spring installation groove, and the starting end (23) and the terminal end (24) of the torsion spring (8) on both sides of the torsion spring are respectively against the inner top surface of the machine cover (3) and the end of the rod body (15). 9. The automatic kerosene lighter according to claim 1 is characterized in that the flint (25) is connected to a longitudinal positioning structure (27), the longitudinal positioning structure (27) includes a positioning spring mounting tube (28) longitudinally arranged in the body (1), an adjusting spring (29) is arranged in the positioning spring mounting tube (28), the top end of the adjusting spring (29) is connected to the bottom end of the flint (25), the bottom end of the adjusting spring (29) is abutted against an adjusting bolt (30) threadedly connected to the bottom of the body (1), a positioning column (31) is arranged on the top of the adjusting bolt (30), the bottom end of the adjusting spring (29) is sleeved on the positioning column (31) and abutted against the top end of the adjusting bolt (30). 10. The automatic kerosene lighter according to claim 2 is characterized in that the switch structure (9) comprises a flip cover hook (32) arranged on the inner wall of the cover (3) away from the hinge shaft (2), the body (1) is provided with a buckle groove plate (33) matched with the flip cover hook (32), the buckle groove plate (33) is connected to a movable plate (34) on the side, the movable plate (34) is provided with a slide groove (35), a positioning plate (36) is provided in the body (1), the movable plate (34) is slidably connected to the positioning plate (36), the combustion head (4) is fixed to the positioning plate (36) by a mounting seat (37) penetrated through the slide groove (35), the bottom of the mounting seat (37) is abutted against the top of the movable plate (34), the buckle groove plate (33) is provided with a button (38) penetrated through the body (1), and a return spring is provided between the slide groove (35) and the mounting seat (37).