Handheld flame gun

Abstract

The utility model provides a handheld flame gun which is provided with indication marks, and the indication marks comprise an ignition area mark used for indicating the ignition position of a first channel switch, an opening mark used for indicating the opening position of the first channel switch and / or a closing mark used for indicating the closing position of the first channel switch. A user can adjust the position of the first channel switch by referring to the ignition area mark, the opening mark and / or the closing mark, so that the flame gun can be more quickly, conveniently and accurately controlled, for example, the operation of repeatedly adjusting the ventilation volume during ignition operation is simplified, whether the flame gun is opened or not is more accurately known, and / or whether the flame gun is closed or not is more accurately confirmed.

Description

Technical Field

[0001] This application relates to the technical field of gas valves, and particularly to a handheld blowtorch. Background Art

[0002] Generally, a handheld blowtorch mainly consists of a valve body and a valve core, which form a simple throttle valve. The user mainly controls the movement of the valve core by adjusting the switch, thereby opening, closing, and adjusting the gas output volume. Due to the rigid interference fit between the valve core and the valve body, the gas throughput and the switch process cannot be quantitatively matched. Therefore, there are usually only direction marks for opening or closing and for adjusting the gas volume on the switch, and there is no accurate position mark for the opening, closing position, or ignition position. This method makes the realization of functions such as closing, opening, and ignition of the blowtorch directly depend on the user's manual blind operation, increasing the user's operation difficulty. Often, the user needs to adjust repeatedly several times to successfully complete the corresponding operation. Utility Model Content

[0003] This application provides a handheld blowtorch to improve the convenience of user operation.

[0004] Based on the above purpose, some embodiments of this application provide a handheld blowtorch, including:

[0005] A valve body, which has a first gas channel for the gas used for ignition to flow through;

[0006] A first channel opening and closing component;

[0007] And a first channel switch for the user to apply a force. The first channel switch is movably installed on the valve body and forms a coupling structure with the first channel opening and closing component. The user can drive the first channel opening and closing component to move through the first channel switch to adjust the gas throughput of the first gas channel;

[0008] The handheld blowtorch has an indication mark, and the indication mark includes an ignition area mark for indicating the ignition position of the first channel switch, an opening mark for indicating the opening position of the first channel switch, and / or a closing mark for indicating the closing position of the first channel switch;

[0009] When the first channel switch moves to the ignition area mark, the position of the first channel opening and closing component ensures that the gas throughput of the first gas channel meets the ignition requirements;

[0010] When the first channel switch moves to the opening mark, the position of the first channel opening and closing component ensures that the first gas channel is opened;

[0011] When the first channel switch moves to the closing mark, the position of the first channel opening and closing assembly ensures that the first gas channel is closed.

[0012] In some embodiments, the first channel opening and closing assembly has an ignition position. When the first channel switch moves to the ignition area mark, the first channel opening and closing assembly is at the ignition position, and the first channel opening and closing assembly opens the first gas channel, and the ventilation volume of the first gas channel meets the ignition requirements.

[0013] And / or, the first channel opening and closing assembly has an open position. When the first channel switch moves to the open mark, the first channel opening and closing assembly is at the open position, and the first channel opening and closing assembly opens the first gas channel.

[0014] And / or, the first channel opening and closing assembly has a closed position. When the first channel switch moves to the closing mark, the first channel opening and closing assembly is in the closed position, and the first channel opening and closing assembly closes the first gas channel.

[0015] In some embodiments, the movement mode of the first channel switch includes rotation, movement or a combination of both. The indication mark is located on one side of at least one movement track of the first channel switch, so that the user can correspond the position of the first channel switch with the indication mark.

[0016] In some embodiments, the first channel opening and closing assembly includes a sealing structure for sealing the first gas channel and a gas volume adjusting structure for adjusting the ventilation volume of the first gas channel.

[0017] When the first channel opening and closing assembly is at the ignition position, the sealing structure opens the first gas channel, and the gas volume adjusting structure controls the ventilation volume in the first gas channel to meet the ignition requirements; when the first channel opening and closing assembly is in the closed position, the sealing structure closes the first gas channel.

[0018] In some embodiments, the sealing structure includes a first valve core. The first valve core is inserted into the first gas channel and forms a coupling structure with the first channel switch. The first valve core has a first sealing part, and the valve body has a second sealing part facing the first sealing part. A section of the first gas channel penetrates through the second sealing part, and a first flexible sealing member with elasticity is arranged between the first sealing part and the second sealing part.

[0019] When the first channel opening and closing assembly is at the ignition position, the first sealing part can be separated from the second sealing part and release the first flexible sealing member to open the first gas channel on the second sealing part.

[0020] When the first channel opening and closing component is in the closed position, the first sealing portion can clamp the first flexible seal member with the second sealing portion to close the first gas channel on the second sealing portion.

[0021] In some embodiments, the gas volume adjustment structure includes a gas volume adjustment member and a gas volume adjustment portion connected to the first valve core. The gas volume adjustment member has a through first gas volume adjustment channel. The gas volume adjustment member is sealed and installed in the first gas channel, and the first gas channel cut off by the gas volume adjustment member is communicated through the first gas volume adjustment channel. The gas volume adjustment portion is inserted into the first gas volume adjustment channel, and the gas volume adjustment portion can increase and decrease the gap between the wall of the first gas volume adjustment channel as the first valve core moves, so as to adjust the gas volume passing through the gap.

[0022] When the first channel opening and closing component is in the ignition position, the gas volume corresponding to the minimum gap between the gas volume adjustment portion and the wall of the first gas volume adjustment channel meets the ignition requirement.

[0023] And / or, when the first channel opening and closing component is in the closed position: the minimum gap between the gas volume adjustment portion and the wall of the first gas volume adjustment channel is 0, or the gas volume corresponding to the minimum gap is less than the ignition requirement, or the inner diameter of the outermost opening at one end of the first gas volume adjustment channel facing the first valve core is equal to the outer diameter of the gas volume adjustment portion at the position corresponding to the opening.

[0024] In some embodiments, the sealing structure includes a first valve core and a second valve core. The first valve core is sealed and inserted into the first gas channel. The first valve core has a transfer channel, and the first gas channel cut off by the first valve core is communicated through the transfer channel. The first valve core has a third sealing portion, and a section of the transfer channel penetrates through the third sealing portion. The second valve core is inserted into the transfer channel and forms a coupling structure with the first channel switch. The second valve core has a fourth sealing portion, and a second flexible seal member with elasticity is provided between the third sealing portion and the fourth sealing portion.

[0025] When the first channel opening and closing component is in the ignition position, the third sealing portion can be separated from the fourth sealing portion to release the second flexible seal member, so as to open the transfer channel on the third sealing portion.

[0026] When the first channel opening and closing component is in the closed position, the third sealing portion can clamp the second flexible seal member with the fourth sealing portion to close the transfer channel on the fourth sealing portion.

[0027] In some embodiments, an elastic member for driving the fourth sealing portion and the third sealing portion to maintain sealing is correspondingly provided on the second valve core; the first channel switch has a moving motion, the second valve core is disposed on the moving path of the first channel switch, and a user can drive the second valve core to move by pressing the first channel switch, so that the fourth sealing portion and the third sealing portion release the second flexible sealing member to conduct the transfer channel.

[0028] In some embodiments, the gas volume adjustment structure includes a gas volume adjustment portion connected to the first valve core. A section of the first gas channel is a second gas volume adjustment channel. The gas volume adjustment portion is inserted into the second gas volume adjustment channel. The first valve core and the first channel switch form a coupling structure. The gas volume adjustment portion can increase and decrease the gap between the second gas volume adjustment channel and the cavity wall as the first valve core moves, so as to adjust the gas volume passing through the gap.

[0029] When the first channel opening and closing assembly is in the ignition position, the gas volume corresponding to the minimum gap between the gas volume adjustment portion and the cavity wall of the second gas volume adjustment channel meets the ignition requirement.

[0030] And / or, when the first channel opening and closing assembly is in the closed position: the minimum gap between the gas volume adjustment portion and the cavity wall of the second gas volume adjustment channel is 0, or the gas volume corresponding to the minimum gap is less than the ignition requirement, or the inner diameter of the outermost opening at one end of the second gas volume adjustment channel facing the first valve core is equal to the outer diameter of the position of the gas volume adjustment portion corresponding to the opening.

[0031] In some embodiments, the indication range of the indication mark is at least one area segment or at least one point.

[0032] And / or, the indication mark further has a first large gas volume mark for indicating the first large gas volume position of the first channel switch. When the first channel switch moves to the first large gas volume mark, the gas volume of the first gas channel is greater than the ignition requirement.

[0033] In some embodiments, the blowtorch further has a housing, and the valve body, the first channel opening and closing assembly, and the first channel switch are all installed on the housing. The ignition area mark is disposed on the housing, the valve body, or other components installed on the housing.

[0034] In some embodiments, the handheld blowtorch further includes a second channel opening and closing assembly and a second channel switch for a user to apply a force. The valve body has a second gas channel. The outlet of the first gas channel and the outlet of the second gas channel are arranged in combination or separately. The second channel switch is movably installed on the valve body and forms a coupling structure with the second channel opening and closing assembly. The user can drive the second channel opening and closing assembly to move through the second channel switch to close and open the second gas channel;

[0035] Wherein, the second channel opening and closing assembly has a second large gas volume position and a closed position. When the second channel opening and closing assembly is in the second large gas volume position, the second channel opening and closing assembly opens the second gas channel, and the ventilation volume of the second gas channel is greater than the ignition requirement; when the second channel opening and closing assembly is in the closed position, the second channel opening and closing assembly closes the second gas channel.

[0036] In some embodiments, the first channel opening and closing assembly includes a first valve core. The first valve core is inserted into the first gas channel and forms a coupling structure with the first channel switch; the first valve core has a first sealing portion, and the valve body has a second sealing portion facing the first sealing portion. The first gas channel penetrates through the second sealing portion, and a first flexible sealing member with elasticity is arranged between the first sealing portion and the second sealing portion;

[0037] When the first channel opening and closing assembly is in the ignition position, the first sealing portion can be separated from the second sealing portion and release the first flexible sealing member to open the first gas channel on the second sealing portion, and the ventilation volume of the first gas channel meets the ignition requirement;

[0038] When the first channel opening and closing assembly is in the closed position, the first sealing portion can clamp the first flexible sealing member with the second sealing portion to close the first gas channel on the second sealing portion.

[0039] In some embodiments, a nozzle is further included, and a temperature indication is arranged on the nozzle. The temperature indication is used to prompt the user of the temperature of the nozzle.

[0040] In some embodiments, the indication further includes a mode indication for indicating the usage mode.

[0041] According to the handheld blowtorch shown in the above embodiments, it has an indication mark, and the indication mark includes an ignition area mark for indicating the ignition position of the first channel switch, an opening mark for indicating the opening position of the first channel switch, and / or a closing mark for indicating the closing position of the first channel switch. Users can refer to the ignition area mark, the opening mark, and / or the closing mark to adjust the position of the first channel switch, and operate the blowtorch more quickly, conveniently, and accurately. For example, it simplifies the operation of repeatedly adjusting the ventilation volume during the ignition operation, more accurately knows whether the blowtorch is turned on, and / or more accurately confirms whether the blowtorch is turned off, etc. Brief Description of the Drawings

[0042] Figure 1 It is a cross-sectional view and a partial enlarged view of a part of the structure of the blowtorch in an embodiment of the present application;

[0043] Figure 2 It is a cross-sectional view and a partial enlarged view of a part of the structure of the blowtorch in an embodiment of the present application;

[0044] Figure 3 It is a schematic diagram of the first channel switch and the indication mark in an embodiment of the present application;

[0045] Figure 4 and 5 It is a schematic diagram of the external structure of the blowtorch in an embodiment of the present application, and at this time, the blowtorch is externally connected with a gas cylinder;

[0046] Figure 6 It is an exploded view of a part of the structure of the blowtorch in an embodiment of the present application;

[0047] Figure 7 It is a cross-sectional view of a part of the structure of the blowtorch in an embodiment of the present application. Detailed Description of the Embodiments

[0048] The present application will be further described in detail below in conjunction with the drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many detailed descriptions are provided to make the present application better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, which is to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the field.

[0049] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean a necessary sequence, unless it is stated otherwise that a certain sequence must be followed.

[0050] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And as used in this application, "connection" and "coupling", unless otherwise specified, both include direct connection, indirect connection, and contact connection (coupling), etc.

[0051] During the normal use of a general handheld blowtorch (referred to as a blowtorch for short), the user controls the opening and closing and the size of the air volume inside the blowtorch by feeling. Since this blind operation is difficult to quickly and accurately control the air volume to the desired size, the user often needs to operate repeatedly many times, increasing the difficulty and inconvenience of operation. For example, when the blowtorch is fired, the air output needs to be controlled within a certain range to cooperate with the ignition switch for ignition. Since it is difficult to control by hand, it has relatively high requirements for the user. For another example, when the blowtorch is turned off, the user may not be able to turn off the blowtorch in place at one time, resulting in air leakage. For another example, when the blowtorch is turned on, the user may not be able to turn on the blowtorch in place at one time, resulting in no gas output and unable to be used for ignition.

[0052] Therefore, in some embodiments of this application, an indication mark is provided on the blowtorch. The indication mark includes an ignition area mark for indicating the ignition position of the first channel switch, an opening mark for indicating the opening position of the first channel switch, and / or a closing mark for indicating the closing position of the first channel switch. The user can refer to the ignition area mark, the opening mark, and / or the closing mark to adjust the position of the first channel switch, and operate the blowtorch more quickly, conveniently, and accurately. For example, it simplifies the operation of repeatedly adjusting the air volume during the ignition operation, more accurately knows whether the blowtorch is turned on and / or more accurately confirms whether the blowtorch is turned off, etc.

[0053] Please refer to Figure 1 and 2 , in some embodiments of this application, a handheld blowtorch is provided, which includes a valve body 100, a first channel opening and closing assembly 200, and a first channel switch 300 for the user to apply a force. Of course, in other embodiments, the handheld blowtorch may also selectively have other structures as needed, such as a housing 400 (see Figure 4 , 5 ), a nozzle 500 (see Figure 4 , 5) The gas cylinder adapter 600 (see Figure 4 , 5 ), etc.

[0054] The valve body 100 has a first gas passage A for the flow of gas. The valve body 100 can be used to form the first gas passage A or more gas passages. The valve body 100 can be an independent part or composed of multiple parts spliced and combined. In Figure 1 and 2 In the illustrated embodiment, the first gas passage A can be used for the flow of gas for ignition, that is, the gas output of the blowtorch during ignition is determined by the ventilation volume of the first gas passage A. In some embodiments, the first gas passage A can be used only as a gas passage for ignition, or in addition to being used as a gas passage for ignition, the first gas passage A can also be used as a gas passage during normal combustion.

[0055] Please refer to Figure 1 and 2 , the first channel switch 300 is movably installed on the valve body 100 and forms a coupling structure with the first channel opening and closing assembly 200, that is, the movement of the first channel switch 300 can drive the opening and closing movement of the first channel, so that the user can drive the first channel opening and closing assembly 200 to move through the first channel switch 300 to adjust the ventilation volume of the first gas passage A. For example, increase the ventilation volume of the first gas passage A, or decrease the ventilation volume of the first gas passage A (including adjusting the ventilation volume of the first gas passage A to 0, that is, closing the first gas passage A).

[0056] Please refer to Figure 3 , the blowtorch has indication marks (such as reference numerals 11, 12, 13, 14, etc. in the figure). The indication marks at least include an ignition area mark 11 for indicating the ignition position of the first channel switch 300, an opening mark for indicating the opening position of the first channel switch 300, and / or a closing mark for indicating the closing position of the first channel switch.

[0057] When the first channel switch 300 moves to the ignition area mark 11, the position of the first channel opening and closing assembly 200 ensures that the ventilation volume of the first gas passage A meets the ignition requirements. The user can refer to the ignition area mark 11 to adjust the position of the first channel switch 300. When the first channel switch 300 moves to the ignition area mark 11, the user can directly ignite, improving the convenience of the user's ignition operation.

[0058] When the position of the first channel switch 300 corresponds to the ignition area mark 11, the first channel opening and closing assembly 200 is in the ignition position, and the first channel opening and closing assembly 200 opens the first gas channel A, and the ventilation volume of the first gas channel A meets the ignition requirement. At this time, the ventilation volume (which determines the gas output volume of the blowtorch) in the blowtorch meets the ignition requirement. Among them, the ventilation volume that meets the ignition requirement refers to that the ventilation volume of the blowtorch at this time is within the ventilation volume range required during ignition. The specific value of the ventilation volume required during ignition can refer to the prior art and will not be elaborated here.

[0059] When the first channel switch 300 moves to the opening mark, the position of the first channel opening and closing assembly 200 ensures that the first gas channel A is opened; when the first channel switch 300 moves to the closing mark, the position of the first channel opening and closing assembly 200 ensures that the first gas channel A is closed.

[0060] Among them, the blowtorch can have both an opening mark and a closing mark, or can only have one of the opening mark and the closing mark. Please refer to Figure 3 , in some embodiments, the mark 13 is shown in the figure, and the mark 13 can be either an opening mark or a closing mark.

[0061] For example, when the mark 13 is an opening mark, when the first channel switch 300 moves from the opening direction ( Figure 3 the shown opening direction is counterclockwise rotation) to the mark 13, at this time the first gas channel A is opened. If the first channel switch 300 does not move to the mark 13 from the opening direction, it means that the first gas channel A is still in the closed state at this time.

[0062] When the mark 13 is a closing mark, when the first channel switch 300 moves from the closing direction ( Figure 3 the shown closing direction is clockwise rotation) to the mark 13, at this time the first gas channel A is closed. If the first channel switch 300 does not move to the mark 13 from the closing direction, it means that the first gas channel A is still in the open state at this time.

[0063] Among them, the indication mark can be but is not limited to sensory marks such as sound marks, color marks, text marks, and touch marks. Among them, the touch mark means that when the first channel switch 300 moves to the corresponding position, different touches will appear, such as jerks, resistance feelings and other touches that can attract attention. In some embodiments, the touch mark can be seen or cannot be seen.

[0064] Further, in some embodiments, the position of the first channel opening and closing assembly 200 can be divided in more detail. For example, in some embodiments, the first channel opening and closing assembly 200 has an ignition position. When the first channel switch 300 moves to the ignition area marking, the first channel opening and closing assembly 200 is located at the ignition position, and the first channel opening and closing assembly 200 opens the first gas channel A. The ventilation volume of the first gas channel A meets the ignition requirements, and the user can directly ignite.

[0065] And / or, the first channel opening and closing assembly 200 has an opening position. When the first channel switch 300 moves to the opening marking, the first channel opening and closing assembly 200 is located at the opening position, and the first channel opening and closing assembly 200 opens the first gas channel A. Among them, in some embodiments, the opening position can represent the position where the first channel opening and closing assembly 200 just opens the first gas channel A. In other embodiments, at this opening position, the ventilation volume of the first gas channel A can be less than the ignition requirements. Or, in other embodiments, at this opening position, the ventilation volume of the first gas channel A can also meet the ignition requirements.

[0066] And / or the first channel opening and closing assembly 200 has a closing position. When the first channel switch 300 moves to the closing marking, the first channel opening and closing assembly 200 is in the closing position, and the first channel opening and closing assembly 200 closes the first gas channel A.

[0067] Further, the indication marking is usually provided on one side of the movement track of the first channel switch 300 so that the user can correspond the position of the first channel switch 300 with the indication marking. The movement mode of the first channel switch 300 can be arbitrary, as long as it can drive the first channel opening and closing assembly 200 to move to open and close the first gas channel A and adjust the ventilation volume of the first gas channel A.

[0068] In some exemplary embodiments, the movement mode of the first channel switch 300 includes rotation, movement or a combination of both. The indication marking is located on one side of at least one section of the movement track of the first channel switch 300, for example, on one side of the rotation movement track, the movement track or a section of the movement track combining both, so that the user can better correspond the position of the first channel switch 300 with the indication marking. The direction of the rotation axis of the rotation movement is not limited, and it can be the vertical direction, the horizontal direction or the oblique direction. The direction of the movement movement is also not limited, and it can be the vertical direction, the horizontal direction or the oblique direction.

[0069] Furthermore, in some embodiments, the first channel switch 300 can adopt a rotation movement mode to adjust the ventilation volume of the first gas channel A, so as to achieve fine adjustment and improve the control accuracy. For example, in Figures 1-3In the illustrated embodiment, the first channel switch 300 is a knob, with an indicator located on one side of the rotational trajectory of the first channel switch 300. Alternatively, the first channel switch 300 may be a lever or other switch structure capable of rotational adjustment. Of course, in other embodiments, the first channel switch 300 may also be pressed or slid to adjust the ventilation volume of the first gas channel A, for example.

[0070] Regarding another aspect of the indication mark, in some embodiments, the indication range of each indication mark is at least one area segment or at least one point. For example, the indication range of the ignition area mark 11 is at least one area segment or at least one point. When the ignition area mark 11 is an area segment, as long as the first channel switch 300 is aligned with the area segment, it means that ignition is possible. The area segment reduces the accuracy requirement for the user to control the first channel switch 300. When the ignition area mark 11 is a point, as long as the first channel switch 300 is aligned with the point, it means that ignition is possible. For example, Figure 3 In the illustrated embodiment, the ignition zone indicator 11 indicates a range of at least one arc-shaped segment. In this case, the first channel switch 300 is a knob. When the knob is rotated, as long as the first channel switch 300 is within the segment of the ignition zone indicator 11, ignition is enabled. Similarly, the on and off indicators can also indicate a range of at least one segment or at least one point.

[0071] Please refer to Figure 3 In some embodiments, to facilitate alignment of the first channel switch 300 with the indicator, a reference mark 301 may be provided on the first channel switch 300. The reference mark 301 may be a line, a graphic, a structural mark (such as a protrusion or a groove), etc., as long as it serves a schematic purpose. For example, when the reference mark 301 is aligned with a corresponding indicator mark (such as the ignition zone mark 11, the on mark, or the off mark), it indicates that the first channel switch 300 has moved to the corresponding indicator mark (such as the ignition zone mark 11, the on mark, or the off mark).

[0072] For further information, please refer to Figure 3, in some embodiments, the blowtorch has a first large gas volume mark 12 for indicating the first large gas volume position of the first channel switch 300. When the first channel switch 300 moves to the position of the first large gas volume mark 12, the gas throughput of the first gas channel A is greater than the ignition requirement. In this embodiment, in addition to helping to complete the ignition operation, the first gas channel A can also increase the gas throughput to achieve the normal combustion function. After the first large gas volume mark 12 is specified, the user can more quickly and clearly determine the current gas throughput situation of the first gas channel A. In addition, more other indication marks can be set on the blowtorch according to needs, such as a maximum gas volume mark representing the maximum gas throughput, a mode mark representing the usage mode that the flame corresponding to the gas throughput can perform, and so on. As Figure 3 shown, the mode mark can include a Sear mark 14 to prompt the user that the flame corresponding to this gas throughput can be used for cooking coked food. The mode mark can also be a low-temperature slow-roasting mode mark or a steak mode mark, etc., for prompting the gas throughput required for low-temperature slow-roasting fire or steak cooking. It can be understood that the indication mark can also include marks with other functions.

[0073] Regarding the position of the indication mark, it can be set on any component of the blowtorch as long as it can satisfy the user to correspond the first channel switch 300 with the indication mark. For example, in some embodiments, please refer to Figure 4 and 5 , the blowtorch also has a housing 400. The aforementioned valve body 100, the first channel opening and closing assembly 200 and the first channel switch 300 are all installed on the housing 400. The indication mark is provided on the housing 400, the valve body 100 or other components installed on the housing 400.

[0074] More specifically, in the embodiments shown in Figure 1 , 4 and 5, the housing 400 includes a cover plate 410 surrounding the first channel switch 300. The first channel switch 300 is movably arranged relative to the cover plate 410. In these embodiments, the indication mark can be provided on the cover plate 410 and the indication mark is located on the periphery of the first channel switch 300 so that the user can better correspond the first channel switch 300 with each indication mark.

[0075] On the other hand, through repeated research and experiments, the inventors of the present application found that the reason why the existing blowtorches do not have ignition indication marks is mainly because of the hard contact between the valve core and the valve body 100 in these blowtorches. The closing of the gas passage is achieved by the extrusion deformation of the contact surface between the valve core and the valve body 100. After long-term use, it is extremely easy to cause wear of the valve body 100 and the valve core, making the position where the valve core is tightened each time when sealing the air valve not fixed. Therefore, various indication marks cannot be accurately given to users. Moreover, as the use time increases, generally a relatively large torque is required to tighten and open the valve core in the later stage, and the user experience will also be greatly reduced. With multiple uses, the wear also intensifies, which will also affect the stability of the gas output volume.

[0076] To solve this technical problem, the present application provides multiple embodiments of the first channel opening and closing assembly.

[0077] Among them, in some embodiments, the first channel opening and closing assembly 200 includes a sealing structure for sealing the first gas channel A and a gas volume adjusting structure for adjusting the gas volume of the first gas channel A. Or, in some other embodiments, the gas volume adjusting structure may not be provided separately. When the sealing structure opens the first gas channel A, it also serves as the gas volume adjusting structure, that is, the opening degree of the sealing structure itself can also be used as the gas volume adjustment.

[0078] More specifically, when the first channel opening and closing assembly 200 includes a sealing structure for sealing the first gas channel A and a gas volume adjusting structure for adjusting the gas volume of the first gas channel A. The gas volume adjusting structure and the sealing structure are separately arranged. The sealing structure is responsible for sealing and does not affect the control of the gas volume by the gas volume adjusting structure. The gas volume adjusting structure is only used for adjusting the gas volume and is not used as the main sealing component, so it has little or no wear. In some embodiments, the control of the sealing structure and the control of the gas volume adjusting structure can be separated. Even if the sealing structure wears, the gas volume adjusting structure can ensure more accurate gas volume control, so as to ensure that the given indication marks are always accurate. Of course, in some other embodiments, the sealing method of the sealing structure can also be improved to reduce the wear of the sealing structure.

[0079] Furthermore, when the first channel opening and closing assembly 200 is in the ignition position, the sealing structure opens the first gas channel A, and the gas volume regulating structure controls the gas flow within the first gas channel A to meet ignition requirements. When the first channel opening and closing assembly 200 is in the closed position, the sealing structure seals the first gas channel A. When the first channel opening and closing assembly 200 is in the closed position, since the sealing structure has already sealed the first gas channel A, the gas volume regulating structure may remain open and may be maintained at a certain opening, such as the opening required for the ignition position. The next time the sealing structure is opened, ignition may proceed directly. Of course, when the first channel opening and closing assembly 200 is in the closed position, the gas volume regulating structure may also close in conjunction with the movement of the first channel opening and closing assembly 200.

[0080] Please refer to Figure 1 、 6 In some embodiments, the sealing structure includes a first valve core 210, which is inserted into the first gas channel A. A gap for gas to pass through is formed between the first valve core 210 and the first gas channel A, for example, Figure 1 In the illustrated structure, the periphery of the first valve core 210 is threadedly connected to the cavity wall of the first gas channel A. This threaded connection is not a sealed connection, and a gap for gas to pass through is formed between the first valve core 210 and the cavity wall of the first gas channel A. Of course, in other embodiments, the first valve core 210 may also be provided with a transfer channel, etc., for connecting to the first gas channel A.

[0081] The first valve core 210 forms a coupling structure with the first channel switch 300, that is, the first channel switch 300 can be linked to the first valve core 210. The first valve core 210 has a first sealing portion 211, and the valve body 100 has a second sealing portion 110 facing the first sealing portion 211. A section of the first gas channel A passes through the second sealing portion 110.

[0082] Please refer to Figure 1 In order to reduce the wear during sealing, in some embodiments, a first flexible seal 241 (such as a sealing ring, a sealing block or other seal) with elasticity is provided between the first sealing part 211 and the second sealing part 110. The first flexible seal 241 can be installed on the first sealing part 211 or on the second sealing part 110, or can be movably provided between the two. Figure 1 In the illustrated embodiment, the first flexible sealing member 241 is sleeved on the first valve core 210 and moves along with the first valve core 210 .

[0083] When the first channel opening and closing assembly 200 is in the ignition position, the first sealing portion 211 can be separated from the second sealing portion 110 and the first flexible sealing member 241 can be released to open the first gas channel A on the second sealing portion 110, thereby opening the entire first gas channel A;

[0084] When the first channel opening and closing component 200 is in the closed position, see Figure 1 At this time, the first sealing portion 211 can clamp the first flexible sealing member 241 with the second sealing portion 110 to close the first gas channel A on the second sealing portion 110, thereby closing the entire first gas channel A.

[0085] In this embodiment, when the first channel opening and closing assembly 200 is in the closed position, the first sealing portion 211 and the second sealing portion 110 are no longer in direct contact, but a sealing effect is achieved by squeezing the flexible sealing member between them, so that the relative positions of the first sealing portion 211 and the second sealing portion 110 are basically fixed each time the first channel opening and closing assembly 200 is closed, and no wear problem will occur.

[0086] For further information, please refer to Figure 1 and 6 In some embodiments, the gas volume adjustment structure includes a gas volume adjustment member 220 and a gas volume adjustment portion 230 connected to the first valve core 210. The gas volume adjustment member 220 has a through-going first gas volume adjustment channel 231. The gas volume adjustment member 220 is sealed within the first gas channel A. The first gas channel A, which is cut off by the gas volume adjustment member 220, is connected through the first gas volume adjustment channel 231. The gas volume adjustment portion 230 is inserted into the first gas volume adjustment channel 231. The gas volume adjustment portion 230 can increase or decrease the gap between the gas volume adjustment portion 230 and the cavity wall of the first gas volume adjustment channel 231 as the first valve core 210 moves, thereby adjusting the amount of air passing through the gap.

[0087] In this embodiment, the gas volume control unit 230 and the first valve core 210 are integrally formed. However, in other embodiments, the two may be fixedly connected or transmission-connected to each other, as long as they can move as a whole. Since the first valve core 210 and the gas volume control unit 230 move as a whole in this embodiment, the first valve core 210 opens and closes the first gas channel A and the gas volume control unit 230 controls the gas volume of the first gas volume control channel 231 simultaneously, simplifying the structure and simplifying the user's operation steps and difficulty.

[0088] For further information, please refer to Figure 1 and 6 In some embodiments, in the axial direction of the first air volume regulating channel 231, the outer diameter of the air volume regulating portion 230 decreases from the side where the first valve core 210 is located to the side where the air volume regulating member 220 is located. This decrease can be a smooth decrease, for example Figure 6 The middle air volume regulating portion 230 is a conical structure. In addition, the reduction can also be a step-by-step reduction, such as forming a pagoda-shaped structure.

[0089] exist Figure 1In the embodiment shown, the first air volume regulating channel 231 is a through hole with a uniform inner diameter. Of course, in other embodiments, the first air volume regulating channel 231 may also be in other shapes, such as an inverted cone with a larger top and a smaller bottom, or other shapes. The gap between the outermost opening of the first air volume regulating channel 231 at one end facing the first valve core 210 and the air volume regulating portion 230 is the main position for limiting the ventilation volume. Figure 1 In the illustrated state, the outermost opening of the first air volume control channel 231, which faces the end of the first valve core 210, is in contact with the outer wall of the air volume control portion 230. This means that the air volume is zero, and the first valve core 210 is in the zero position. As the first valve core 210 moves upward, the air volume control portion 230 also moves upward, and the gap between the outermost opening of the first air volume control channel 231, which faces the end of the first valve core 210, and the outer wall of the air volume control portion 230 gradually increases, thereby increasing the air volume.

[0090] Based on the coordinated structure of the first gas volume regulating channel 231 and the gas volume regulating portion 230, in some embodiments, when the first channel opening and closing assembly 200 is in the ignition position, the ventilation volume corresponding to the minimum gap between the gas volume regulating portion 230 and the cavity wall of the first gas volume regulating channel 231 meets the ignition requirements;

[0091] And / or, when the first channel opening and closing assembly 200 is in the closed position: the minimum gap between the air volume regulating portion 230 and the cavity wall of the first air volume regulating channel 231 is 0, or the ventilation volume corresponding to the minimum gap is less than the ignition requirement.

[0092] Alternatively, in some embodiments, when the first channel opening and closing assembly 200 is in the closed position, the inner diameter of the outermost opening of the first air volume regulating channel 231 at one end facing the first valve core 210 is equal to the outer diameter of the position of the air volume regulating part 230 corresponding to the opening. At this time, there is no extrusion deformation or only slight deformation between the mouth wall of the outermost opening at one end of the first air volume regulating channel 231 and the air volume regulating part 230. In this way, the wear and consumption between the two can be reduced to avoid inaccurate air volume regulation.

[0093] Please refer to Figure 1 In some more specific embodiments, the second sealing portion 110 is a boss structure, the air volume regulating member 220 is located on one side of the second sealing portion 110, and the air volume regulating portion 230 is from the side of the second sealing portion 110 away from the air volume regulating member 220, penetrates the second sealing portion 110, and is inserted into the first air volume regulating channel 231 of the air volume regulating member 220.

[0094] The movement of the first valve core 210 on the valve body 100 may be rotation or movement along a portion of the first gas channel A. Figure 1 and 7, in some embodiments, the first valve element 210 is threadedly connected to the valve body 100, and the first channel switch 300 is non-rotatably connected to the first valve element 210, so that the user can control the movement of the first valve element 210 in the first gas channel A by rotating the first channel switch 300. The so-called non-rotatable connection means that the first channel switch 300 and the first valve element 210 are directly or indirectly limited in the rotational direction relative to each other. When the first channel switch 300 rotates, it also drives the first valve element 210 to rotate, so that the first valve element 210 rotates and moves up and down in the valve body 100. Of course, in other embodiments, the first valve element 210 can also be inserted into the valve body 100 in a sliding manner and move axially in the corresponding first gas channel A.

[0095] More specifically, please refer to Figure 4 and 7 , in some embodiments, the first channel switch 300 is a knob, and the user can control the first valve element 210 through the knob. At this time, the indication mark can be provided on one side of the rotation path of the knob.

[0096] Please refer to Figure 2 , in some other embodiments, the sealing structure includes a first valve element 210 and a second valve element 250. The first valve element 210 is sealingly inserted into the first gas channel A and cuts off the first gas channel A. The first valve element 210 has a transfer channel 212, and the first gas channel A cut off by the first valve element 210 is communicated through the transfer channel 212. At this time, as long as the transfer channel 212 is closed, the first gas channel A can be closed.

[0097] Please refer to Figure 2 , as an example of the transfer channel 212, the transfer channel 212 has a first opening 2121, a second opening 2123 and an axial channel 2122. Both the first opening 2121 and the second opening 2123 are located on the side surface of the first valve element 210, and the first opening 2121 and the second opening 2123 are communicated through the axial channel 2122. The first gas channel A cut off by the first valve element 210 is communicated with the transfer channel 212 through the first opening 2121 and the second opening 2123 respectively. In addition, the transfer channel 212 can also adopt other structures, not limited to Figure 2 the structure shown.

[0098] Please refer to Figure 2 , in some embodiments, the first valve element 210 has a third sealing portion 213, and a section of the transfer channel 212 penetrates through the third sealing portion 213. The second valve element 250 is inserted into the transfer channel 212 and forms a coupling structure with the first channel switch 300, that is, the first channel switch 300 can drive the second valve element 250 to move at least during a section of the movement. The second valve element 250 has a fourth sealing portion 251.

[0099] Please refer toFigure 2 , in order to reduce wear during sealing, in some embodiments, a second flexible seal 242 (such as a sealing ring, a sealing block or other seals) with elasticity is provided between the third seal 213 and the fourth seal 251. The second flexible seal 242 can be installed on the third seal 213, or on the fourth seal 251, or movably disposed between the two. In Figure 2 the illustrated embodiment, the second flexible seal 242 is sleeved and fixed on one end of the second valve core 250 passing through the third seal 213 and moves with the second valve core 250.

[0100] When the first channel opening and closing assembly 200 is in the ignition position, the third seal 213 can be separated from the fourth seal 251 to release the second flexible seal 242, so as to open the transfer channel 212 on the third seal 213; when the first channel opening and closing assembly 200 is in the closed position, the third seal 213 can clamp the second flexible seal 242 with the fourth seal 251 to close the transfer channel 212 on the fourth seal 251.

[0101] In order to simplify the structure and prevent the second valve core 250 from rotating with the first channel switch 300, please refer to Figure 2 , in some embodiments, the second valve core 250 and the first channel switch 300 have an intermittent coupling structure, that is, the first channel switch 300 can trigger the movement of the second valve core 250 only when it moves to a specific position. For example, the first channel switch 300 can move. The second valve core 250 is disposed on the movement track of the first channel switch 300. The user can drive the second valve core 250 to move by pressing the first channel switch 300, so that the fourth seal 251 and the third seal 213 release the second flexible seal 242 to conduct the transfer channel 212.

[0102] Specifically, in Figure 2 , the first channel switch 300 is located above the second valve core 250. Only when the second channel switch moves downward and contacts the second valve core 250, and then the first channel switch 300 continues to move downward, can the second valve core 250 be driven to move downward together.

[0103] In order to ensure that the second valve core 250 can be reset, please refer to Figure 2 , in some embodiments, the second valve core 250 is correspondingly provided with an elastic member 254 for driving the fourth seal 251 and the third seal 213 to maintain sealing. The elastic member 254 can be a spring or other forms of elastic members. In Figure 2 , the elastic member 254 is sleeved on the second valve core 250 and drives the second valve core 250 to reset upward to ensure that the fourth seal 251 and the third seal 213 maintain sealing.

[0104] Further, please refer to Figure 2 , in some embodiments, in order to drive the first channel switch 300 to reset upward in time, an elastic member 310 for driving it to move upward may also be provided corresponding to the first channel switch 300. The elastic member 310 may be disposed between the first channel switch 300 and the second valve core 250. When the pressing force input by the user disappears, the elastic member 310 can drive the first channel switch 300 to reset upward. Of course, in other embodiments, the elastic member 310 for resetting the first channel switch 300 may also be omitted, and the first channel switch 300 is reset by manual operation of the user.

[0105] Further, please refer to Figure 2 , in some embodiments, the gas volume adjustment structure includes a gas volume adjustment portion 230 connected to the first valve core 210. A section of the first gas channel A is the second gas volume adjustment channel 120. The gas volume adjustment portion 230 is inserted into the second gas volume adjustment channel 120. At this time, the gap between the gas volume adjustment portion 230 and the cavity wall of the second gas volume adjustment channel 120 determines the ventilation volume in the first gas channel A. The first valve core 210 and the first channel switch 300 form a coupling structure, and the gas volume adjustment portion 230 can increase and decrease the gap with the cavity wall of the second gas volume adjustment channel 120 as the first valve core 210 moves, so as to adjust the ventilation volume passing through the gap.

[0106] Please refer to Figure 2 , in this embodiment, the gas volume adjustment portion 230 and the first valve core 210 are an integrally formed structure, but in other embodiments, the two may also be fixedly connected to each other as long as they can move integrally.

[0107] Please refer to Figure 2 , in some embodiments, along the axial direction of the second gas volume adjustment channel 120, the outer diameter of the gas volume adjustment portion 230 decreases from the side where the first valve core 210 is located to the side where the second gas volume adjustment channel 120 is located. This decrease can be a smooth decrease. For example, Figure 2 the gas volume adjustment portion 230 in

[0108] In Figure 2 the illustrated embodiment, the second gas volume adjustment channel 120 is a through hole with a uniform inner diameter. Of course, in other embodiments, the second gas volume adjustment channel 120 may also be of other shapes, such as an inverted cone shape with a larger upper part and a smaller lower part or other shapes. The outermost opening at the end of the second gas volume adjustment channel 120 facing the first valve core 210 and the gap between the gas volume adjustment portion 230 are the main positions for limiting the ventilation volume. In Figure 2In the state shown, the outermost opening at one end of the second gas volume adjustment passage 120 facing the first valve core 210 is in contact with the outer wall of the gas volume adjustment portion 230, that is, the gas throughput at this time is 0, which means the first valve core 210 is in the zero position. When the first valve core 210 moves upward, the gas volume adjustment portion 230 also moves upward, and the gap between the outermost opening at one end of the second gas volume adjustment passage 120 facing the first valve core 210 and the outer wall of the gas volume adjustment portion 230 gradually increases, thereby adjusting the gas throughput upward.

[0109] Based on the cooperation structure between the second gas volume adjustment passage 120 and the gas volume adjustment portion 230, in some embodiments, when the first passage opening and closing assembly 200 is in the ignition position, the gas throughput corresponding to the minimum gap between the gas volume adjustment portion 230 and the cavity wall of the second gas volume adjustment passage 120 meets the ignition requirements;

[0110] And / or, when the first passage opening and closing assembly 200 is in the closed position: the minimum gap between the gas volume adjustment portion 23 and the cavity wall of the second gas volume adjustment passage 120 is 0, or the gas throughput corresponding to the minimum gap is less than the ignition requirements.

[0111] Or, in some embodiments, when the first passage opening and closing assembly 200 is in the closed position, the inner diameter of the outermost opening at one end of the second gas volume adjustment passage 120 facing the first valve core 210 is equal to the outer diameter of the gas volume adjustment portion 230 at the position corresponding to this opening. At this time, there is no extrusion deformation or only slight deformation between the wall of the outermost opening at one end of the second gas volume adjustment passage 120 and the gas volume adjustment portion 230. In this way, the wear and tear between the two can be reduced to avoid inaccurate gas volume adjustment.

[0112] Among them, the movement of the first valve core 210 on the valve body 100 can be either rotation or movement along a part of the first gas passage A. Please refer to Figure 2 In some embodiments, the first valve core 210 is threadedly connected to the valve body 100. In this embodiment, the first passage switch 300 has translational and rotational movements. The ignition area mark 11 is provided on one side of the rotational path of the first passage switch 300. At this time, only when the first passage switch 300 is kept pressed down and rotated to the position of the ignition area mark 11, the first passage opening and closing assembly 200 is in the ignition position.

[0113] Please refer to Figure 2 When the first passage switch 300 makes a rotational movement, it can drive the first valve core 210 to move to adjust the gap between the gas volume adjustment portion 230 and the cavity wall of the second gas volume adjustment passage 120; when the first passage switch 300 makes a translational movement (such as moving downward), it can drive the second valve core 250 to move to conduct the transfer passage 212.

[0114] More specifically, please refer toFigure 2 , in some embodiments, the first channel switch 300 is non-rotatably connected to the first valve core 210, and the first valve core 210 has a space for the first channel switch 300 to move relative to the first valve core 210 in directions approaching and departing from the second valve core 250, so that the user can drive the second valve core 250 to move by pressing the first channel switch 300 to conduct the transfer channel 212. The so-called non-rotatably connection means that the first channel switch 300 and the first valve core 210 are directly or indirectly limited in the rotational direction relative to each other. When the first channel switch 300 rotates, it also drives the first valve core 210 to rotate, thereby causing the first valve core 210 to move up and down in the valve body 100. Of course, in other embodiments, the first valve core 210 can also be inserted into the valve body 100 in a sliding manner and move along its axial direction in the corresponding first gas channel A.

[0115] More specifically, please refer to Figure 2 , in some embodiments, the first channel switch 300 is a knob, and the user can control the first valve core 210 through the knob. At this time, the ignition area mark 11 is provided on one side of the rotation path of the knob.

[0116] Please refer to Figure 2 , in some embodiments, the transfer channel 212 further has a third opening 2124, the third opening 2124 is located above the axial channel 2122, the second valve core 250 is inserted into the axial channel 2122 from the third opening 2124, and the first channel switch 300 is movably installed at the third opening 2124. The third opening 2124 can be closed by the first channel switch 300 or other structures. In addition, the second valve core 250 can also be installed in the first valve core 210 in other ways, not limited to Figure 2 the structure shown.

[0117] The above embodiments show the embodiments in which the first channel opening and closing assembly 200 includes both a sealing structure for sealing the first gas channel A and a gas volume adjusting structure for adjusting the gas volume of the first gas channel A. In some other embodiments of the present application, the gas volume adjusting structure can also be omitted. When the sealing structure opens the first gas channel A, it also serves as a gas volume adjusting structure, that is, the opening degree of the sealing structure itself can also be used as the gas volume adjustment.

[0118] For example, please refer to Figure 1 (omitted Figure 1The gas volume adjustment member 220 and the gas volume adjustment unit 230) in it, the first channel opening and closing assembly 200 includes a first valve core 210, the first valve core 210 is inserted into the first gas channel A, and forms a coupling structure with the first channel switch 300; the first valve core 210 has a first sealing portion 211, the valve body 100 has a second sealing portion 110 facing the first sealing portion 211, the first gas channel A penetrates through the second sealing portion 110, and an elastic first flexible sealing member 241 is provided between the first sealing portion 211 and the second sealing portion 110;

[0119] When the first channel opening and closing assembly 200 is in the ignition position, the first sealing portion 211 can be separated from the second sealing portion 110 and release the first flexible sealing member 241 to open the first gas channel A on the second sealing portion 110, and the gas throughput of the first gas channel A meets the ignition requirements;

[0120] When the first channel opening and closing assembly 200 is in the closed position, the first sealing portion 211 can clamp the first flexible sealing member 241 with the second sealing portion 110 to close the first gas channel A on the second sealing portion 110.

[0121] On the other hand, when the blowtorch is lit, it often requires a larger gas throughput to support the combustion demand, and the first channel switch 300 is usually designed as a fine-tuning structure, so it is difficult to quickly increase the gas throughput of the first gas channel A. Based on this, please refer to Figure 1 and 2 , in some embodiments, the blowtorch further includes a second channel opening and closing assembly 710 and a second channel switch 720 for the user to apply a force. The valve body 100 has a second gas channel B, the outlet of the first gas channel A and the outlet of the second gas channel B are combined or separated, the second channel switch 720 is movably installed on the valve body 100, and forms a coupling structure with the second channel opening and closing assembly 710. The user can drive the second channel opening and closing assembly 710 to move through the second channel switch 720 to close and open the second gas channel B.

[0122] Among them, the second channel opening and closing assembly 710 has a second large gas volume position and a closed position. When the second channel opening and closing assembly 710 is in the second large gas volume position, the second channel opening and closing assembly 710 opens the second gas channel B, and the gas throughput of the second gas channel B is greater than the ignition requirement; when the second channel opening and closing assembly 710 is in the closed position, the second channel opening and closing assembly 710 closes the second gas channel B.

[0123] To meet the fine-tuning requirements of the first-channel switch 300 and the requirement of quickly increasing the ventilation volume of the second-channel switch 720, in some embodiments, the first-channel switch 300 adjusts the ventilation volume of the first gas channel A in a rotational manner. For example, a knob or other structure is used to achieve the purpose of stepless gas volume adjustment. The second-channel switch 720 opens the second gas channel B by pressing. For example, the Figure 4 shown one-key high-fire key 800 can quickly increase the ventilation volume of the second gas channel B by pressing, so as to meet the requirements of high-fire combustion. In some embodiments, the gas volume flowing out of the blowtorch cavity when the second-channel opening and closing assembly 710 is at the second large gas volume position is basically equal to the gas volume flowing out of the blowtorch cavity when the first-channel switch 300 moves to the maximum gas volume position of the first large gas volume mark 12.

[0124] Please refer to Figure 1 and 2 . In some embodiments, the intake section of the first gas channel A and the intake section of the second gas channel B are combined together to form a common intake section C. The common intake section C is arranged vertically, so that the blowtorch can be vertically installed on the gas cylinder 900, as shown in Figure 4 and 5 . The housing 400 of the blowtorch also forms a handle 420. The common intake section C is not arranged on the handle 420, but in the middle of the entire housing 400. In this way, when the gas cylinder 900 is installed, due to torque balance, the blowtorch together with the gas cylinder 900 can be placed upright on the horizontal plane, which is convenient for taking and placing (as shown in Figure 4 and 5 ).

[0125] Please refer to Figure 1 and 2 . In some embodiments, the second-channel opening and closing assembly 710 includes a third valve core 711. The third valve core 711 is inserted into the second gas channel B and has a fifth sealing portion 712, and the fifth sealing portion 712 can form a seal with the cavity wall of the second gas channel B. In Figure 1 and 2In the illustrated embodiment, an elastic member 730 is provided on the third valve core 711. The elastic member 730 directly or indirectly acts on the third valve core 711 to keep it in a sealed state. The second channel switch 720 is a pressing member, which can directly or indirectly receive the pressing force applied by the user and move towards the third valve core 711. The third valve core 711 is located on the movement trajectory of the pressing member. When the pressing member moves to a specific position, it can drive the third valve core 711 to quickly move in the direction of opening the second gas channel B, thereby starting to increase the ventilation volume of the second gas channel B to meet the high-fire demand. The second channel switch 720 can be reset under the action of another elastic member 730 to disengage from the third valve core 711, or can also be reset by the user's manual operation. Of course, in other embodiments, the second channel opening and closing assembly 710 can also adopt other structures, not limited to Figure 1 and 2 the structure shown.

[0126] Please refer to Figure 4 and 5 , in some embodiments, a one-key high-fire key 800 is provided on the handle 420 of the housing 400. The one-key high-fire key 800 can directly serve as the second channel switch 720, or can also form a coupling structure with the second channel switch 720, so that the user can directly or indirectly control the third valve core 711 to open the second gas channel B by pressing the one-key high-fire key 800.

[0127] In addition, please refer to Figure 5 , in some embodiments, a temperature indication 501 is provided on the spray head 500 to prompt the user of the temperature of the spray head and prevent the user from being scalded when touching the spray head 500 at high temperature. The temperature indication 501 can be made of a thermosensitive material, such as a temperature-changing sticker, a temperature-changing paint, etc. At high temperature, the temperature indication 501 presents a second color, prompting the user that the spray head 500 is at high temperature at this time to avoid scalding; at low temperature, the temperature indication 501 presents a first color, prompting the user that the spray head 500 is at a lower temperature at this time and can be touched. It can be understood that the first color and the second color are different colors. The first color can be a transparent color, or a cold-toned color such as white, blue, or green; the second color can be a warm-toned color such as yellow, orange, or red. Of course, in other embodiments, the first color and the second color can also be other colors, as long as the two can be distinguished from each other.

[0128] The above uses specific examples to elaborate on the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the technical field to which the present application belongs, according to the idea of the present application, several simple deductions, deformations, or replacements can also be made.

Claims

1. A handheld blowtorch, characterized in that, Comprising: A valve body having a first gas passage through which gas for ignition can flow; A first passage opening and closing assembly; And a first passage switch for the user to apply a force. The first passage switch is movably mounted on the valve body and forms a coupling structure with the first passage opening and closing assembly. The user can drive the first passage opening and closing assembly to move through the first passage switch to adjust the gas flow rate of the first gas passage; The hand-held blowtorch has an indication mark, which includes an ignition area mark for indicating the ignition position of the first passage switch, an opening mark for indicating the open position of the first passage switch, and / or a closing mark for indicating the closed position of the first passage switch; When the first passage switch moves to the ignition area mark, the position of the first passage opening and closing assembly ensures that the gas flow rate of the first gas passage meets the ignition requirement; When the first passage switch moves to the opening mark, the position of the first passage opening and closing assembly ensures that the first gas passage is opened; When the first passage switch moves to the closing mark, the position of the first passage opening and closing assembly ensures that the first gas passage is closed.

2. The hand-held blowtorch according to claim 1, characterized in that, The first passage opening and closing assembly has an ignition position. When the first passage switch moves to the ignition area mark, the first passage opening and closing assembly is located at the ignition position, and the first passage opening and closing assembly opens the first gas passage, and the gas flow rate of the first gas passage meets the ignition requirement; And / or, the first passage opening and closing assembly has an open position. When the first passage switch moves to the opening mark, the first passage opening and closing assembly is located at the open position, and the first passage opening and closing assembly opens the first gas passage; And / or, the first passage opening and closing assembly has a closed position. When the first passage switch moves to the closing mark, the first passage opening and closing assembly is in the closed position, and the first passage opening and closing assembly closes the first gas passage mark.

3. The hand-held blowtorch according to claim 1, characterized in that, The movement mode of the first passage switch includes rotation, translation, or a combination of both. The indication mark is located on one side of at least a part of the movement track of the first passage switch, so that the user can correspond the position of the first passage switch with the indication mark.

4. The hand-held blowtorch according to claim 1, wherein The first passage opening and closing assembly includes a sealing structure for sealing the first gas passage and a gas flow rate adjusting structure for adjusting the gas flow rate of the first gas passage; When the first passage opening and closing assembly is at the ignition position, the sealing structure opens the first gas passage, and the gas flow rate adjusting structure controls the gas flow rate in the first gas passage to meet the ignition requirement; when the first passage opening and closing assembly is in the closed position, the sealing structure closes the first gas passage.

5. The handheld blowtorch according to claim 4, wherein The sealing structure includes a first valve core, which is inserted into the first gas channel and forms a coupling structure with the first channel switch; the first valve core has a first sealing portion, the valve body has a second sealing portion facing the first sealing portion, a section of the first gas channel penetrates through the second sealing portion, and an elastic first flexible sealing member is provided between the first sealing portion and the second sealing portion; When the first channel opening and closing assembly is in the ignition position, the first sealing portion can be separated from the second sealing portion to release the first flexible sealing member, so as to open the first gas channel on the second sealing portion; When the first channel opening and closing assembly is in the closed position, the first sealing portion can clamp the first flexible sealing member with the second sealing portion to close the first gas channel on the second sealing portion.

6. The handheld blowtorch according to claim 5, characterized in that, The gas volume adjustment structure includes a gas volume adjustment member and a gas volume adjustment portion connected to the first valve core. The gas volume adjustment member has a through first gas volume adjustment channel. The gas volume adjustment member is sealed and installed in the first gas channel, and the first gas channel cut off by the gas volume adjustment member is communicated through the first gas volume adjustment channel; the gas volume adjustment portion is inserted into the first gas volume adjustment channel, and the gas volume adjustment portion can increase and decrease the gap between the gas volume adjustment portion and the cavity wall of the first gas volume adjustment channel as the first valve core moves, so as to adjust the gas volume passing through the gap; When the first channel opening and closing assembly is in the ignition position, the gas volume corresponding to the minimum gap between the gas volume adjustment portion and the cavity wall of the first gas volume adjustment channel meets the ignition requirement; And / or, when the first channel opening and closing assembly is in the closed position: the minimum gap between the gas volume adjustment portion and the cavity wall of the first gas volume adjustment channel is 0, or the gas volume corresponding to the minimum gap is less than the ignition requirement, or the inner diameter of the outermost opening at one end of the first gas volume adjustment channel facing the first valve core is equal to the outer diameter of the gas volume adjustment portion at the position corresponding to the opening.

7. The hand-held blowtorch according to claim 4, characterized in that, The sealing structure includes a first valve core and a second valve core. The first valve core is sealed and inserted into the first gas channel; the first valve core has a transfer channel, and the first gas channel cut off by the first valve core is communicated through the transfer channel; the first valve core has a third sealing portion, a section of the transfer channel penetrates through the third sealing portion, the second valve core is inserted into the transfer channel and forms a coupling structure with the first channel switch; the second valve core has a fourth sealing portion, and an elastic second flexible sealing member is provided between the third sealing portion and the fourth sealing portion; When the first channel opening and closing assembly is in the ignition position, the third sealing portion can be separated from the fourth sealing portion to release the second flexible sealing member, so as to open the transfer channel on the third sealing portion; When the first channel opening and closing assembly is in the closed position, the third sealing portion can clamp the second flexible sealing member with the fourth sealing portion to close the transfer channel on the fourth sealing portion.

8. The handheld blowtorch according to claim 7, wherein, The second valve core is correspondingly provided with an elastic member for driving the fourth sealing portion and the third sealing portion to maintain sealing; the first channel switch has a moving motion, the second valve core is arranged on the moving path of the first channel switch, and a user can drive the second valve core to move by pressing the first channel switch, so that the fourth sealing portion and the third sealing portion release the second flexible sealing member to conduct the transfer channel.

9. The hand-held blowtorch according to claim 7, wherein The gas volume adjustment structure includes a gas volume adjustment portion connected to the first valve core. A section of the first gas channel is a second gas volume adjustment channel. The gas volume adjustment portion is inserted into the second gas volume adjustment channel. The first valve core and the first channel switch form a coupling structure. The gas volume adjustment portion can increase and decrease the gap with the inner wall of the second gas volume adjustment channel as the first valve core moves, so as to adjust the gas volume passing through the gap. When the first channel opening and closing assembly is at the ignition position, the gas volume corresponding to the minimum gap between the gas volume adjustment portion and the inner wall of the second gas volume adjustment channel meets the ignition requirement. And / or, when the first channel opening and closing assembly is in the closed position: the minimum gap between the gas volume adjustment portion and the inner wall of the second gas volume adjustment channel is 0, or the gas volume corresponding to the minimum gap is less than the ignition requirement, or the inner diameter of the outermost opening at one end of the second gas volume adjustment channel facing the first valve core is equal to the outer diameter of the gas volume adjustment portion at the position corresponding to the opening.

10. The hand-held blowtorch according to claim 1, wherein, The indication range of the indication mark is at least one area segment or at least one point. And / or, the indication mark further has a first large gas volume mark for indicating the first large gas volume position of the first channel switch. When the first channel switch moves to the first large gas volume mark, the gas volume of the first gas channel is greater than the ignition requirement.

11. The hand-held blowtorch according to claim 1, characterized in that, The blowtorch further has a housing. The valve body, the first channel opening and closing assembly and the first channel switch are all installed on the housing. The ignition area mark is arranged on the housing, the valve body or other components installed on the housing.

12. The handheld blowtorch according to claim 1, wherein The hand-held blowtorch further includes a second channel opening and closing assembly and a second channel switch for the user to apply a force. The valve body has a second gas channel. The gas outlet of the first gas channel and the outlet of the second gas channel are combined or separated. The second channel switch is movably installed on the valve body and forms a coupling structure with the second channel opening and closing assembly. The user can drive the second channel opening and closing assembly to move through the second channel switch to close and open the second gas channel. Wherein, the second channel opening and closing assembly has a second large gas volume position and a closed position. When the second channel opening and closing assembly is at the second large gas volume position, the second channel opening and closing assembly opens the second gas channel, and the gas volume of the second gas channel is greater than the ignition requirement. When the second channel opening and closing assembly is in the closed position, the second channel opening and closing assembly closes the second gas channel.

13. The hand-held blowtorch according to claim 1, wherein The first channel opening and closing assembly includes a first valve core, which is inserted into the first gas channel and forms a coupling structure with the first channel switch; the first valve core has a first sealing portion, and the valve body has a second sealing portion facing the first sealing portion. The first gas channel penetrates through the second sealing portion, and an elastic first flexible sealing member is provided between the first sealing portion and the second sealing portion; When the first channel opening and closing assembly is in the ignition position, the first sealing portion can be separated from the second sealing portion to release the first flexible sealing member, so as to open the first gas channel on the second sealing portion, and the ventilation volume of the first gas channel meets the ignition requirements; When the first channel opening and closing assembly is in the closed position, the first sealing portion can clamp the first flexible sealing member with the second sealing portion to close the first gas channel on the second sealing portion.

14. The hand-held blowtorch according to claim 1, wherein, It further includes a spray head, on which a temperature label is provided, and the temperature label is used to prompt the user of the temperature of the spray head.

15. The hand-held blowtorch according to claim 1, characterized in that, The indication label further includes a mode label for indicating the usage mode.

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