Gas burner and its safety switch

Abstract

A gas burner, which comprises a housing, a storage cylinder; a gas control device provided at the top of the storage cylinder, an ignition device having a button, a safety switch adjacent to the button, and a combustion device; the safety switch includes a fixing member and a locking member that abuts against a locking bolt protruding from the bottom surface of the button; the fixing member includes a chamber for the locking member to be sleeved, and a swing arm longitudinally arranged at intervals in front of the chamber and having a hook; and the locking member is provided with a body placed in the chamber, a longitudinal spring is arranged between the body and the chamber, and the body has a pressing key extending out of a through groove longitudinally opened on a rear wall of the chamber, and a locking hook protruding towards the position of the hook.

Description

Technical Field

[0001] The present invention relates to a gas burner, and more particularly to a gas burner having a safety switch. When the safety switch is not operated, it is in a locked state, and when unlocked, a pressing action can be performed. Background Art

[0002] Due to the changes of the times, lighters have replaced matches as the main fire-starting devices. For the currently commonly used gas burners, because they have the advantages of strong flames, can be held and operated with one hand, and are convenient to carry around, they are deeply loved by the public and widely used.

[0003] Due to the popularity of gas burners, for children, they often play with them without permission due to their tendency to imitate and curiosity. Therefore, if not careful, it may easily cause a fire and endanger people's lives and property safety. Thus, in many fire cases, disasters caused by children playing with fire are numerous. Exploring the reasons, it lies in that the ignition switches of known gas burners are easy to press and operate for the convenience of use, giving children an opportunity, and ultimately leading to unexpected consequences.

[0004] Based on safety considerations, governments of various countries have formulated relevant safety regulations for gas burners and have compulsorily required that gas burners must be equipped with safety switches. For example, the US Patent No. 6,293,782 (corresponding to the Taiwan, China Patent Publication No. 446104), Patent No. 6,296,476 (corresponding to the Taiwan, China Patent Publication No. 449018), Patent No. 6,527,543 (corresponding to the Taiwan, China Patent Publication No. 525749), Patent No. 7,708,554 (corresponding to the Taiwan, China Patent Publication No. M306647), and Patent No. 7,850,446 (corresponding to the Taiwan, China Patent Publication No. M338954) owned by the applicant of the present invention are remarkable examples. When the gas burner is not in use, the aforementioned safety switch is in a locked state; when in use, the safety switch must be released first before fire can be obtained. Since the release action of the safety switch increases the operation difficulty, when children play with it, they cannot release it, thus reducing the occurrence of disasters.

[0005] Therefore, adding a safety switch to gas burners to comply with relevant safety regulations of various countries is a common issue faced by related industries. Summary of the Invention

[0006] The main object of the present invention is to provide a gas burner having a safety switch that can be manually unlocked, automatically locked, and pressed for operation, so as to increase the safety during operation and the durability in use.

[0007] To achieve the foregoing objectives, the technical means adopted by the present invention is to provide a gas burner, which includes a housing for covering a storage cylinder and a gas control device provided at the top of the storage cylinder. An opening at the rear adjacent to the upper section of the back surface of the housing is provided for a button of an ignition device to protrude, and a slot for a safety switch to protrude is provided. The front upper section is provided with a front opening for installing a combustion device; the gas control device includes an air pressure plate for the button to abut against and pivotally connected to the inside of the housing, and a piezoelectric element is sleeved inside the button. The piezoelectric element has a conductive wire extending to a nozzle of the combustion device and spaced apart; wherein the safety switch includes a fixing member and a locking member that abuts against a locking bolt protruding from the bottom surface of the button; the fixing member includes a chamber for the locking member to be sleeved, and a swing arm with a hook is longitudinally provided at intervals in front of the chamber; the locking member is provided with a body placed in the chamber, a longitudinal spring is provided between the body and the chamber, and the body has a pressing key extending out of a through slot longitudinally opened on a rear wall of the chamber, and a locking hook protruding toward the position of the hook; when the pressing key is not pressed downward, the locking hook abuts against the hook, and the locking bolt abuts against the locking member to form a locked state where it cannot be pressed; when the pressing key is longitudinally pressed downward to compress the longitudinal spring, and the locking hook above the body moves downward along the hook to an abutting state, so that the locking bolt loses the abutment of the locking member to form an unlocked state where it can be pressed, and the button can be pressed to compress the piezoelectric element, and the air pressure plate is actuated, causing the swing arm to tilt forward and deform, and prompting the hook to disengage from the locking hook, and the locking member moves upward due to the release of energy of the longitudinal spring, and a top surface of the locking member touches the locking bolt.

[0008] In one embodiment, the fixing member further includes a column in front of the swing arm, and a transverse spring is provided between the column and the swing arm; when the button is in an automatic locking state, the swing arm is under the action of the release of energy of the transverse spring to assist in returning to the upright locking state.

[0009] In one embodiment, both ends of the transverse spring are respectively sleeved on a first spring tenon and a second spring tenon oppositely arranged on the swing arm and the column.

[0010] In one embodiment, at least one side wall of the chamber is provided with an anti-disengagement groove; and the body is correspondingly provided with an anti-disengagement tenon that snaps into each anti-disengagement groove to prevent the locking member from longitudinally disengaging from the chamber.

[0011] In one embodiment, the longitudinal spring is sleeved between a spring groove and a spring post oppositely arranged on the body and the chamber.

[0012] In one embodiment, at least one positioning tenon protrudes from each of the two side walls of the fixing member, and at least one positioning hole for the at least one positioning tenon to be inserted and positioned is correspondingly provided on the inner wall of the slot of the housing.

[0013] In one embodiment, the gas control device has a gas outlet nozzle for gas on / off control. One end of a gas delivery pipe is sleeved on the gas outlet nozzle, and the other end of the gas delivery pipe is connected with a jet nozzle. One end of a rocker of the gas outlet pressing plate is sleeved on the gas outlet nozzle, and a follower plate at the other end abuts against a push rod of the key.

[0014] In one embodiment, the combustion device includes a fixing base made of metal. A seat hole for installing the flame jet nozzle and a first wire groove for passing the conducting wire are respectively provided at the center and the circumferential surface of the fixing base. The jet nozzle is further combined with the flame jet nozzle having at least one air inlet hole provided on the circumferential surface. The fixing base is sleeved in an end port cover, and the end port cover is connected to the front opening.

[0015] In one embodiment, a pressing part extending from the rear opening is provided behind the key; and the piezoelectric element further has a return wire touching the fixing base.

[0016] In one embodiment, an auxiliary spring is further connected in parallel and oppositely to the push rod of the key. Both ends of the auxiliary spring are arranged at a key tenon of the key and an inner wall of the housing.

[0017] In one embodiment, a heat insulation ring is sleeved outside the flame jet nozzle. The heat insulation ring is a tubular body made of ceramic, and a second wire groove for passing the conducting wire is provided on its circumferential surface.

[0018] In one embodiment, a longitudinal chute for installing a continuous key is provided on one side surface of the housing corresponding to the position of the key. The continuous key extends an arresting rod inward, and a retaining groove is provided on the key corresponding to the movement path of the arresting rod; when the key is in the unlocked state and is pressed, the continuous key is toggled to move the arresting rod into the retaining groove to form a locked state, so as to prevent the key from rebounding and returning, and a continuous gas supply state is formed.

[0019] Another object of the present invention is to provide a safety switch for a gas burner, which has functions of manual unlocking and automatic locking, so as to improve the safety during operation and the durability in use.

[0020] To achieve the foregoing objectives, the technical means adopted by the present invention is to provide a safety switch for a gas burner, which includes a fixing member and a locking member configured to abut against a locking bolt protruding from the bottom surface of a button; the fixing member includes a chamber for the locking member to be sleeved therein, and a swing arm longitudinally arranged at an interval in front of the chamber and having a hook; the locking member is provided with a body placed in the chamber, a longitudinal spring is arranged between the body and the chamber, and the body has a pressing key extending out of a through groove longitudinally opened on a rear wall of the chamber, and a locking hook protruding toward the position of the hook; when the pressing key is not pressed downward, the locking hook abuts against the hook, and the locking bolt abuts against the locking member to form a locked state where it cannot be pressed; when the pressing key is longitudinally pressed downward to compress the longitudinal spring, and the locking hook above the body moves downward along the hook to an abutting state, so that the locking bolt loses the abutment of the locking member to form an unlocked state where it can be pressed, causing the swing arm to tilt forward and deform, and prompting the hook to disengage from the locking hook, and causing the locking member to move upward due to the release of energy of the longitudinal spring, and touching a top surface of the locking member against the locking bolt.

[0021] In an embodiment, the fixing member further includes a column in front of the swing arm, and a transverse spring is arranged between the column and the swing arm; when the button is in an automatic locking state, the swing arm is under the action of the release of energy of the transverse spring to assist in returning to the upright locking state.

[0022] In an embodiment, both ends of the transverse spring are respectively sleeved on a first spring tenon and a second spring tenon oppositely arranged on the swing arm and the column.

[0023] In an embodiment, at least one side wall of the chamber is provided with a anti - detachment groove; and the body is correspondingly provided with an anti - detachment tenon protruding and buckling therein at each position of the anti - detachment groove to prevent the locking member from longitudinally detaching from the chamber.

[0024] In an embodiment, the longitudinal spring is sleeved between a spring groove and a spring post oppositely arranged on the body and the chamber.

[0025] In an embodiment, at least one positioning tenon protrudes from each of the two side walls of the fixing member, and at least one positioning hole for the at least one positioning tenon to be inserted and positioned is correspondingly provided on the inner wall of the clamping groove of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To further disclose the specific technical content of the present invention, please first refer to the accompanying drawings, wherein:

[0027] Figure 1 and Figure 2 are exploded perspective views of two different perspectives of the gas burner of the present invention;

[0028] Figure 3 and Figure 4Stereo exploded views of the safety switch of the present invention from two different perspectives;

[0029] Figure 5 is Figure 1 a sectional view taken along line A-A;

[0030] Figure 6 is Figure 1 a sectional view taken along line B-B;

[0031] Figure 7 Stereo exploded view of the combustion device of the present invention;

[0032] Figure 8 Stereo view of the assembled gas burner of the present invention;

[0033] Figure 9 Sectional view of the assembled gas burner of the present invention;

[0034] Figures 10 to 12 Sectional view of the unlocking process of the locking member of the safety switch of the present invention;

[0035] Figure 13 Sectional view of the continuous switch of the present invention when not operated; and

[0036] Figure 14 Sectional view of the continuous switch of the present invention when operating and interfering with the button.

[0037]

Description of the main element symbols in the drawings

[0038] Storage cylinder 1

[0039] Gas control device 2

[0040] Gas outlet nozzle 21

[0041] Gas pipeline 22

[0042] Jet nozzle 23

[0043] Gas outlet pressure plate 24

[0044] Warped plate 241

[0045] Driven plate 242

[0046] Gas regulating ring 25

[0047] Adjusting rod 251

[0048] Ignition device 3

[0049] Button 31

[0050] Push rod 311

[0051] Pressing part 312

[0052] Tenon 313

[0053] Bolt 314

[0054] Stop groove 315

[0055] Piezoelectric device 32

[0056] Conductive wire 321

[0057] Return wire 322

[0058] Auxiliary spring 33

[0059] Safety switch 4

[0060] Fixing part 41

[0061] Chamber 411

[0062] Through groove 411a

[0063] Anti - detachment groove 411b

[0064] Spring post 411c

[0065] Positioning tenon 411d

[0066] Swing arm 412

[0067] Hook 412a

[0068] First spring tenon 412b

[0069] Column 413

[0070] Second spring tenon 413a

[0071] Horizontal spring 414

[0072] Locking part 42

[0073] Body 421

[0074] Anti - detachment tenon 421a

[0075] Spring groove 421b

[0076] Press key 422

[0077] Longitudinal spring 423

[0078] Lock hook 424

[0079] Combustion device 5

[0080] Fixed seat 51

[0081] Seat hole 511

[0082] The first wire groove 512

[0083] The flame nozzle 52

[0084] The air inlet hole 521

[0085] The port cover 53

[0086] The heat insulation ring 54

[0087] The second wire groove 541

[0088] The housing 6

[0089] The left housing 61

[0090] The right housing 62

[0091] The rear opening 63

[0092] The clamping groove 64

[0093] The positioning hole 65

[0094] The front opening 66

[0095] The bottom hole 67

[0096] The ventilation groove 68

[0097] The longitudinal chute 69

[0098] The continuous key 7

[0099] The stop lever 71 Specific implementation mode

[0100] As Figures 1 to 9 shown, basically, the gas burner of the present invention includes a storage cylinder 1, a gas control device 2, an ignition device 3, a safety switch 4, a combustion device 5, and a housing 6.

[0101] The storage cylinder 1 is used to store liquid gas, and its bottom has a known filling nozzle (not shown due to the projection angle) for refueling.

[0102] The gas control device 2 is provided at the top of the storage cylinder 1. The gas control device 2 has an air outlet nozzle 21 for controlling the on / off of the gas. One end of a gas pipeline 22 is sleeved on the air outlet nozzle 21, and the other end of the gas pipeline 22 is connected to a jet nozzle 23.

[0103] When the air outlet nozzle 21 is pulled up, the liquid gas in the storage cylinder 1 is vaporized, so that the gas enters the gas pipeline 22 from the air outlet nozzle 21 and is ejected rapidly from the jet nozzle 23 to enter the combustion device 5 for combustion operation.

[0104] The gas control device 2 further includes an air outlet pressure plate 24 pivotally connected within the housing 6. The air outlet pressure plate 24 is preferably an L-shaped frame. One end of it has a rocker plate 241 sleeved on the air outlet nozzle 21, and the other end has a driven plate 242 abutting against a button 31 of the ignition device 3. When the driven plate 242 of the air outlet pressure plate 24 is pushed by a push rod 311 on one side of the button 31, a moment will cause the rocker plate 241 to tilt upward and pull up the air outlet nozzle 21 to form a gas supply state, enabling the gas to pass through the gas pipeline 22 and be ejected from the jet nozzle 23 to enter the combustion device 5.

[0105] Furthermore, the air outlet nozzle 21 is further sleeved with an air volume adjustment ring 25. A regulating rod 251 extending laterally from the air volume adjustment ring 25 extends out of the housing 6. So when the regulating rod 251 is turned, it will cause the air volume adjustment ring 25 to rotate the air outlet nozzle 21 to adjust the gas outlet volume.

[0106] The ignition device 3 includes the button 31 and a piezoelectric element 32 sleeved within the button 31. The button 31 has a push rod 311 protruding from the front side to abut against the driven plate 242, and a pressing portion 312 extending from a rear opening 63 of the housing 6 at the rear. The piezoelectric element 32 has a conducting wire 321 and a return wire 322, such as a spring, extending to the combustion device 5 respectively.

[0107] The button 31 is further connected with an auxiliary spring 33 in parallel opposition to the push rod 311. Both ends of the auxiliary spring 33 are arranged at a key tenon 313 of the button 31 and an inner wall of the housing 6 to assist the elastic return of the button 31 to the starting position.

[0108] Please refer to Figures 1 to 6 again. The safety switch 4 includes a fixing member 41 and a locking member 42 that abuts against a locking bolt 314 protruding from the bottom surface of the button 31. The safety switch 4 is sleeved within a clamping groove 64 below the rear opening 63 and is located below the button 31.

[0109] The fixing member 41 includes a chamber 411 for the locking member 42 to be sleeved, and a swing arm 412 longitudinally arranged at intervals in front of the chamber 411 and having a hook 412a. The chamber 411 has a through groove 411a longitudinally provided on a rear wall, and at least one side wall is provided with an anti-disengagement groove 411b; the locking member 42 is provided with a body 421 placed within the chamber 411a, and a longitudinal spring 423 is arranged between the body 421 and the chamber 411a, enabling the locking member 42 to elastically move longitudinally within the fixing member 41.

[0110] Furthermore, the body 421 has a pressing key 422 extending from the through slot 411a, and the body 421 is provided with an anti - detachment tenon 421a protruding and buckling into each anti - detachment slot 411b to prevent the locking member 42 from longitudinally disengaging from the accommodation chamber 411a of the fixing member 41.

[0111] In addition, the body 421 protrudes a locking hook 424 toward the position of the hook 412a. Please refer to Figure 5 . When the locking member 42 is not pressed downward, the locking hook 424 abuts against the hook 412a of the swing arm 412. The longitudinal spring 423 is sleeved between a spring groove 421b and a spring post 411c which are oppositely arranged on the body 421 and the accommodation chamber 411a.

[0112] To enable the safety switch 4 to be fixed in the housing 6, at least one positioning tenon 411d protrudes from each of the two side walls of the fixing member 41, and at least one positioning hole 65 (shown in Figure 1 and Figure 2 ) for inserting and positioning the at least one positioning tenon 411d is correspondingly provided on the inner wall of the clamping groove 64 of the housing 6.

[0113] Furthermore, the fixing member 41 further includes a column 413 in front of the swing arm 412, and a transverse spring 414 is provided between the column 413 and the swing arm 412. When the key 31 is in the automatic locking state, the swing arm 412 is under the energy - releasing action of the transverse spring 414 to assist in returning to the upright locking state. The two ends of the transverse spring 414 are respectively sleeved on a first spring tenon 412b and a second spring tenon 413a which are oppositely arranged on the swing arm 412 and the column 413 so as not to fall off.

[0114] According to the foregoing description, after the fixing member 41 and the locking member 42 are assembled, the safety switch 4 as shown in Figure 1 is formed, and the sectional view of the assembled safety switch 4 is shown in Figure 5 and Figure 6 . The manual unlocking and automatic locking operations of the safety switch 4 and the key 31 will be described later.

[0115] Please refer to Figure 1 , Figure 2 and Figure 7, the combustion device 5 is installed at a front opening 66 of the housing 6. The combustion device 5 includes a fixing base 51 made of a metal, such as aluminum alloy. A seat hole 511 for installing a burner nozzle 52 and a first wire groove 512 for passing the conductive wire 321 are respectively provided at the center and the circumferential surface of the fixing base 51. Additionally, the jet nozzle 23 is combined with the burner nozzle 52. At least one air inlet hole 521 is formed on the circumferential surface of the burner nozzle 52 so as to introduce external air into the burner nozzle 52 and mix it with the combustible gas ejected from the jet nozzle 23 to facilitate combustion. The fixing base 51 is sleeved inside an end cap 53, and the end cap 53 is connected to the front opening 66 of the housing 6, enabling the return wire 322 to be in electrical contact with the fixing base 51 and keeping a small distance between the conductive wire 321 and the burner nozzle 52.

[0116] When the safety switch 4 is in the unlocked state, the user presses the button 31, causing the piezoelectric device 32 to be compressed. The generated high-voltage static electricity is conducted through the conductive wire 321 to the position of the burner nozzle 52, generating a spark between the conductive wire 321 and the burner nozzle 52, thereby igniting the mixed combustible gas ejected from the burner nozzle 52 for combustion operation. The high-voltage static electricity then passes through the fixing base 51 and the return wire 322 and returns to the piezoelectric device 32 to form an electric current loop.

[0117] In addition, to achieve a better safety effect, a heat insulation ring 54 is sleeved outside the burner nozzle 52. The heat insulation ring 54 is a tube made of ceramic, and a second wire groove 541 for passing the conductive wire 321 is provided on its circumferential surface.

[0118] The housing 6 is formed by butting a left housing 61 and a right housing 62 to wrap the storage cylinder 1 and the gas control device 2. A bottom hole 67 is opened at the bottom of the housing 6 corresponding to the filling nozzle position of the bottom surface of the storage cylinder 1. On the upper section of the back surface of the housing 6, a rear opening 63 for the pressing part 312 of the button 31 to protrude and a clamping groove 64 for the pressing key 422 of the safety switch 4 to protrude are adjacently provided, while on the upper section of the front, a front opening 66 for installing the combustion device 5 is provided.

[0119] Furthermore, at least one ventilation groove 68 is opened on at least one side of the front opening 66 of the housing 6 to facilitate air introduction into the at least one air inlet hole 521 to provide an effect of assisting combustion.

[0120] In addition, to provide the function of continuous combustion, a longitudinal sliding groove 69 for installing a continuous key 7 is opened on one side surface of the housing 6 corresponding to the position of the button 31. The continuous key 7 extends inward with a stop rod 71, and a stop groove 315 is opened on the button 31 corresponding to the movement path of the stop rod 71. As Figure 13As shown, when the button 31 is in the locked state, the stop lever 71 of the continuous key 7 abuts against the bottom edge of the button 31, preventing it from being toggled upward. As Figure 14 shown, when the button 31 is in the unlocked state and is pressed, the gas control device 2 is brought into a gas supply state. Immediately afterwards, the continuous key 7 is toggled upward, causing the stop lever 71 to move into the stop groove 315 and form a locked (interfering) state to prevent the button 31 from rebounding and returning, thereby forming a continuous gas supply state.

[0121] From the foregoing description of each component, the three-dimensional state of the gas burner after assembly is as Figure 8 shown, and Figure 9 shows the cross-sectional view of the gas burner after assembly.

[0122] Please refer to Figures 9 to 12 , which shows the cross-sectional view of the unlocking process of the locking member 42 of the safety switch 4. As Figure 10 shown, when the button 31 and the safety switch 4 are not operated, the locking hook 424 abuts against the catch 412a, and the locking bolt 314 abuts against the locking member 42, forming a locked state where it cannot be pressed. At this time, both the longitudinal spring 423 and the transverse spring 414 are in the extended (energy-released) state.

[0123] As Figure 11 shown, when unlocking is to be performed, the user presses the push button 422 of the locking member 42 longitudinally downward to compress the longitudinal spring 423, and causes the locking hook 424 above the body 421 to move downward along the catch 412a to a mutually abutting state, so that the locking bolt 314 forms an unlocked state where it can be pressed due to the loss of the abutment of the locking member 42.

[0124] As Figure 12 shown, at this time the user can press the button 31 to simultaneously squeeze the piezoelectric element 32 and the auxiliary spring 33, and push the air outlet pressure plate 24, causing the gas control device 2 to supply gas to the burner nozzle 52 as described above and be ignited by the high-voltage static electric spark transmitted by the conductive wire 321; and the swing arm 412 deforms and tilts forward, compressing the transverse spring 414, causing the catch 412a to disengage from the locking hook 424, and causing the locking member 42 to move upward due to the release of energy of the longitudinal spring 423 and bring a top surface into contact with the locking bolt 314.

[0125] At this time, if continuous combustion operation is to be performed, while the button 31 is still in the pressed state, the user uses the other hand to toggle the continuous key 7 upward, causing the stop lever 71 to move into the stop groove 315 of the button 31 and form a locked state to prevent the button 31 from rebounding and returning, thereby forming a continuous gas supply state.

[0126] When the burning operation is completed, the user toggles the continuous key 7 downward to disengage the stop lever 71 from the stop groove 315 to release the locked state of continuous gas supply. At this time, the key 31 moves backward by the energy release of the piezoelectric element 32 and the auxiliary spring 33, causing the air outlet pressure plate 24 to lose the support of the key 31 and the energy release effect of the air outlet nozzle 21, so that the air outlet pressure plate 24 and the air outlet nozzle 21 return to their original positions simultaneously to cut off the gas supply and extinguish the combustion flame of the burner nozzle 52. The bolt 314 also moves backward along the top surface of the locking member 42, causing the swing arm 412 to return to its original position by its own elasticity or the energy release of the lateral spring 414. Until the bolt 314 moves outside the locking member 42 and forms a butt joint, the locking member 42 uses the energy release of the longitudinal spring 423 to cause the locking hook 424 to cross over the hook 412a and abut against the hook 412a to form an Figure 10 automatically locked state as shown.

[0127] Therefore, through the implementation of the present invention, the enhanced effects are that the safety switch has dual functions of manual unlocking and automatic locking after integration, to increase the safety during operation and durability in use. Since the manual unlocking process is quite cumbersome and difficult, it can effectively prevent unexpected disasters that may be caused by children's play, thus meeting the safety regulations of various countries. Furthermore, when the present invention is to terminate the burning operation, only by releasing the pressing of the key or releasing the interference of the continuous member, the safety switch, the piezoelectric element and the air outlet pressure plate can return to their original positions, cut off the gas supply, extinguish the flame and automatically lock, which is a very user-friendly design consideration and truly an excellent innovation never seen before in similar products.

[0128] What is disclosed in the present invention is one of the preferred embodiments. Any partial change or modification derived from the technical idea of the present invention and easily inferred by those skilled in the art shall not fall outside the scope of the patent protection of the present invention.

Claims

1. A gas burner, which includes a housing for enclosing a storage cylinder and a gas control device provided at the top of the storage cylinder. An upper rear section of the back surface of the housing is adjacent to provide a rear opening for a key of an ignition device to protrude and a clamping groove for a safety switch to protrude, while an upper front section is provided with a front opening for installing a combustion device; the gas control device includes an air pressure plate that is abutted by the key and pivotally connected inside the housing, and a piezoelectric element is sleeved inside the key. The piezoelectric element has a conductive wire that extends to a nozzle of the combustion device and is spaced apart; wherein the safety switch includes a fixing member and a locking member that abuts against a locking bolt protruding from the bottom surface of the key; the fixing member includes a chamber for the locking member to be sleeved, and a swing arm having a hook is longitudinally provided at an interval in front of the chamber; and the locking member is provided with a body placed inside the chamber. A longitudinal spring is provided between the body and the chamber, and the body has a pressing key extending out of a through groove longitudinally opened on a rear wall of the chamber, and a locking hook protruding toward the position of the hook; when the pressing key is not pressed downward, the locking hook abuts against the hook, and the locking bolt abuts against the locking member to form a locked state where it cannot be pressed; wherein the fixing member further includes a column in front of the swing arm, and the chamber, the column and the swing arm are integrally formed, and the swing arm is located between the chamber and the column; when the pressing key is longitudinally pressed downward to compress the longitudinal spring and make the locking hook above the body move downward along the hook to an abutting state, so that the locking bolt loses the abutment of the locking member to form an unlocked state where it can be pressed, and then the key can be pressed to compress the piezoelectric element, and the air pressure plate is actuated, so that the swing arm tilts forward and deforms, and moves toward the column of the fixing member, so as to cause the hook to disengage from the locking hook, and the locking member moves upward due to the release of energy of the longitudinal spring, and a top surface of the locking member touches the locking bolt.

2. The gas burner according to claim 1, wherein a transverse spring is provided between the column and the swing arm; when the key is in an automatic locking state, the swing arm is assisted by the release of energy of the transverse spring to return to the upright locking state.

3. The gas burner according to claim 2, wherein two ends of the transverse spring are respectively sleeved on a first spring tenon and a second spring tenon provided oppositely on the swing arm and the column.

4. The gas burner according to claim 1, wherein at least one side wall of the chamber is provided with an anti - detachment groove; and the body is provided with an anti - detachment tenon that snaps into each anti - detachment groove at corresponding positions to prevent the locking member from longitudinally detaching from the chamber.

5. The gas burner according to claim 1, wherein the longitudinal spring is sleeved between a spring groove and a spring post provided oppositely on the body and the chamber.

6. The gas burner according to claim 1, wherein at least one positioning tenon protrudes from each of two side walls of the fixing member, and at least one positioning hole for the at least one positioning tenon to be inserted and positioned is correspondingly provided on the inner wall of the clamping groove of the housing.

7. The gas burner according to claim 1, wherein the gas control device has a gas outlet nozzle for gas cut-off control. One end of a gas pipeline is sleeved on the gas outlet nozzle, and the other end of the gas pipeline is connected with a jet nozzle. One end of a rocker of a gas outlet pressing plate is sleeved on the gas outlet nozzle, and a driven plate at the other end abuts against a push rod of the key.

8. The gas burner according to claim 7, wherein the combustion device includes a fixed seat made of metal. A seat hole for installing the flame nozzle and a first wire groove for passing the conducting wire are respectively provided at the center and the circumferential surface of the fixed seat. The jet nozzle is combined with the flame nozzle having at least one air inlet hole provided on the circumferential surface. The fixed seat is sleeved in a port cover, and the port cover is connected to the front opening.

9. The gas burner according to claim 7, wherein a pressing part extending from the rear opening is provided behind the key; and the piezoelectric element further has a return wire touching the fixed seat.

10. The gas burner according to claim 7, wherein an auxiliary spring is further connected in parallel and opposite to the push rod of the key. Both ends of the auxiliary spring are arranged at a key tenon of the key and an inner wall of the housing.

11. The gas burner according to claim 7, wherein a heat insulation ring is sleeved outside the flame nozzle. The heat insulation ring is a tubular body made of ceramics, and a second wire groove for passing the conducting wire is provided on its circumferential surface.

12. The gas burner according to claim 1, wherein a longitudinal chute for installing a continuous key is provided on one side surface of the housing corresponding to the position of the key. The continuous key extends inwards with a stop rod, and a stop groove is provided on the key corresponding to the movement path of the stop rod; when the key is in the unlocked state and is pressed, the continuous key is toggled to move the stop rod into the stop groove to form a locked state, so as to prevent the key from rebounding and returning, and a continuous gas supply state is formed.

13. A safety switch for a gas burner as described in any one of claims 1 - 12, which includes a fixing member and a locking member that abuts against a locking bolt protruding from the bottom surface of a button; the fixing member includes a chamber for the locking member to be sleeved in, and a swing arm with a hook longitudinally arranged at a distance in front of the chamber; and the locking member is provided with a body placed in the chamber, a longitudinal spring is arranged between the body and the chamber, and the body has a pressing key extending out of a through slot longitudinally opened on a rear wall of the chamber, and a locking hook protruding towards the position of the hook; when the pressing key is not pressed downwards, the locking hook abuts against the hook, and the locking bolt abuts against the locking member to form a locked state where it cannot be pressed; wherein the fixing member further includes a column in front of the swing arm, and the chamber, the column and the swing arm are integrally formed, and the swing arm is located between the chamber and the column; when the pressing key is longitudinally pressed down to compress the longitudinal spring, and the locking hook above the body moves down along the hook to an abutting state, so that the locking bolt loses the abutment of the locking member to form an unlocked state where it can be pressed, causing the swing arm to tilt forward and deform, and move towards the column of the fixing member, so as to prompt the hook to disengage from the locking hook, and the locking member moves upwards due to the release of energy of the longitudinal spring, and a top surface of the locking member touches the locking bolt.

14. The safety switch for a gas burner according to claim 13, wherein a transverse spring is arranged between the column and the swing arm; during the period when the button is in an automatic locking state, the swing arm is assisted by the release of energy of the transverse spring to return to the upright locking state.

15. The safety switch for a gas burner according to claim 14, wherein two ends of the transverse spring are respectively sleeved on a first spring tenon and a second spring tenon arranged oppositely on the swing arm and the column.

16. The safety switch for a gas burner according to claim 13, wherein at least one side wall of the chamber is provided with a anti - detachment groove; and the body is provided with an anti - detachment tenon protruding and buckling in each anti - detachment groove corresponding to the position thereof, so as to prevent the locking member from longitudinally detaching from the chamber.

17. The safety switch for a gas burner according to claim 13, wherein the longitudinal spring is sleeved between a spring groove and a spring post arranged oppositely on the body and the chamber.

18. The safety switch for a gas burner according to claim 13, wherein at least one positioning tenon protrudes from each of two side walls of the fixing member, and at least one positioning hole for the at least one positioning tenon to be inserted and positioned is correspondingly arranged on the inner wall of the clamping groove of the housing.

Images