Gas stove timer

Abstract

The utility model discloses a gas stove timer which comprises a mounting base (1) and a movable main body (2) capable of axially moving along the mounting base (1), the movable main body (2) comprises a lower shell (21) and a knob (22) which are coaxially arranged; the knob (22) is in running fit with the lower shell (21); a connecting shaft sleeve (221) matched with a gas stove switch shaft is arranged on the knob (22); a driven gear piece (3) is coaxially arranged in the knob (22); the driven gear piece (3) is in running fit with the knob (22); according to the utility model, through reasonable structural layout and component connection relation, the structure is compact, the component layout is compact, the miniaturization is easy to realize, the coaxial installation of the whole machine and the gas stove switch shaft can be realized, the installation adaptability to different gas stove switches is good, the number of components is small, the structure is simple, the installation and the use are convenient, and the gas stove switch is suitable for popularization and use.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stove timers, and specifically relates to a gas stove timer. Background Art

[0002] A gas stove timer is an auxiliary device that can turn off the gas stove switch after setting a time. Currently, most gas stoves on the market do not have a timing device. Therefore, problems such as water boiling dry, food burning, and pots burning often occur, and even fires are caused by forgetting to turn off the gas stove, resulting in huge property losses and casualties.

[0003] Although there are already some mechanical or electronic gas stove timers in the prior art, they have defects such as large installation volume occupation, complex structure, high failure rate, and low installation efficiency. Due to the different distances of the switches of different gas stoves, a large volume will result in poor adaptability to gas stoves on the market. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the prior art to some extent: to provide a gas stove timer with a compact structure, which is conducive to miniaturization, has good installation adaptability, a simple structure, and is convenient for installation and use.

[0005] The technical solution of the utility model is as follows: A gas stove timer includes an installation base and a movable main body that can move axially along the installation base; the movable main body includes a lower shell and a knob arranged coaxially; the knob is rotationally matched with the lower shell; a connecting shaft sleeve for cooperating with the gas stove switch shaft is arranged on the knob; a driven gear member is coaxially arranged inside the knob; the driven gear member is rotationally matched with the knob;

[0006] A sleeve that is rotationally matched with the connecting shaft sleeve is arranged inside the lower shell; a motor is arranged inside the lower shell; the output shaft of the motor is connected to a driving gear; the driving gear meshes with the driven gear member;

[0007] A controller, a timer, and a flameout sensor are arranged on the knob; the timer, the flameout sensor, and the motor are all electrically connected to the controller.

[0008] As an optimization, the flameout sensor is a micro switch, and a protrusion for cooperating with the micro switch is arranged on the sleeve; when the knob rotates to trigger the micro switch by the protrusion, that is, when the switch is closed; the angular position of the knob relative to the lower shell is the flameout position of the gas stove switch shaft.

[0009] As an optimization, a gear reset sensor electrically connected to the controller is further arranged on the knob; the gear reset sensor is used to detect whether the driven gear member reaches a preset reset angle relative to the knob.

[0010] As an optimization, the gear reset sensor is a tactile switch, and a bump cooperating with the tactile switch is provided on the driven gear member; when the driven gear member rotates to the bump triggering the tactile switch, the driven gear member reaches a preset reset angle relative to the knob.

[0011] As an optimization, the driven gear member is axially limited between the lower case and the knob; the side wall of the driven gear member is rotatably engaged with the lower case.

[0012] As an optimization, the connecting bushing is sleeved with the sleeve; the upper end of the connecting bushing is fixedly connected with the knob, and a flange for axially limiting the lower case is provided at the lower end of the connecting bushing.

[0013] Preferably, the driven gear member includes a tooth ring and a top wall, a fan-shaped hollow is provided on the top wall around the connecting bushing; a blocking post is provided on the knob; the end of the blocking post is located within the fan-shaped hollow.

[0014] As an optimization, the mounting base is axially movably engaged with the bottom of the lower case; the bottom of the lower case is coaxially sleeved with the mounting base; an opening for the gas stove switch shaft to pass through is provided at the bottom of the mounting base; a plurality of limiting buckles are provided around the opening at the bottom of the mounting base, and jacks corresponding to the limiting buckles are provided at the bottom of the lower case; the limiting buckles are snapped into the jacks to limit the maximum amplitude of the axial movement of the mounting base and the lower case.

[0015] As an optimization, the mounting base is circumferentially limited and engaged with the bottom of the lower case; guiding ribs are provided on the inner wall of the mounting base; guiding grooves cooperating with the guiding ribs are provided on the outer wall of the lower case.

[0016] As an optimization, a detachable sleeve cooperating with the gas stove switch shaft is coaxially provided within the connecting bushing, a depth adjustment bolt is provided within the detachable sleeve; an internal thread section threadedly cooperating with the depth adjustment bolt is provided at the upper end of the detachable sleeve; the cross section of the opening at the lower end of the detachable sleeve matches the cross section of the gas stove switch shaft; the minimum inner diameter of the internal thread section of the detachable sleeve is greater than the maximum outer diameter of the gas stove switch shaft.

[0017] As an optimization, a display screen, a power supply and a potentiometer electrically connected to the controller are further provided on the knob; the display screen is used for displaying the timer time; the input shaft of the potentiometer is connected to the adjustment knob and is used for adjusting the timing time; the motor is connected to the driving gear through a gear reduction box.

[0018] The utility model has the following beneficial effects: Through reasonable structural layout and component connection relationship, the utility model realizes the advantages of compact structure, compact component layout and easy miniaturization, can realize the coaxial installation of the whole machine and the gas stove switch shaft, has good installation adaptability to different gas stove switches, few components, simple structure and convenient installation and use, and is suitable for popularization and use. Description of the Drawings

[0019] Figure 1 It is a schematic three-dimensional structure diagram of the gas stove timer in the embodiment.

[0020] Figures 2-6 It is an exploded view of the gas stove timer in the embodiment.

[0021] Figure 7 It is a schematic diagram of the cooperation structure between the knob and the driven gear part of the gas stove timer in the embodiment.

[0022] Figure 8 It is a schematic sectional view of the installation state of the gas stove timer in the embodiment.

[0023] Figure 9 It is a schematic three-dimensional sectional structure diagram of the gas stove timer in the embodiment.

[0024] Figure 10 It is a schematic sectional structure diagram of the gas stove timer in the embodiment.

[0025] Among them, 1. Installation base; 11. Opening; 12. Limit buckle; 13. Guide rib; 2. Movable body; 21. Lower shell; 211. Sleeve; 212. Motor; 213. Driving gear; 214. Projection; 215. Jack; 216. Guide groove; 22. Knob; 221. Connecting shaft sleeve; 222. Flameout sensor; 223. Gear reset sensor; 224. Blocking column; 225. Removable sleeve; 226. Depth adjustment bolt; 227. Display screen; 228. Power supply; 229. Adjustment knob; 2210. Motor terminal; 3. Driven gear part; 31. Convex block; 32. Sector-shaped hollow. Detailed Embodiment

[0026] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model. Embodiment

[0027] Now in combination with Figures 1-10Describe a gas stove timer, which includes an installation base 1 and a movable body 2 that can move axially along the installation base 1; the movable body 2 includes a lower shell 21 and a knob 22 arranged coaxially; the knob 22 is rotationally matched with the lower shell 21; a connecting shaft sleeve 221 for cooperating with the gas stove switch shaft is provided on the knob 22; a driven gear member 3 is coaxially arranged inside the knob 22; the driven gear member 3 is rotationally matched with the knob 22;

[0028] A sleeve 211 that is rotationally matched with the connecting shaft sleeve 221 is provided inside the lower shell 21; a motor 212 is provided inside the lower shell 21; the output shaft of the motor 212 is connected to a driving gear 213; the driving gear 213 meshes with the driven gear member 3;

[0029] A controller, a timer, and a flameout sensor 222 are provided on the knob 22; the timer, the flameout sensor 222, and the motor 212 are all electrically connected to the controller.

[0030] The flameout sensor 222 is a microswitch, and a protrusion 214 that cooperates with the microswitch is provided on the sleeve 211; when the knob 22 rotates until the microswitch is triggered by the protrusion 214; the angular position of the knob 22 relative to the lower shell 21 is the flameout position of the gas stove switch shaft.

[0031] A gear reset sensor 223 that is electrically connected to the controller is also provided on the knob 22; the gear reset sensor 223 is used to detect whether the driven gear member 3 reaches a preset reset angle relative to the knob 22.

[0032] The gear reset sensor 223 is a touch switch, and a bump 31 that cooperates with the touch switch is provided on the driven gear member 3; when the driven gear member 3 rotates until the bump 31 triggers the touch switch; the driven gear member 3 reaches a preset reset angle relative to the knob 22.

[0033] The driven gear member 3 is axially limited between the lower shell 21 and the knob 22; the side wall of the driven gear member 3 is rotatably matched with the lower shell 21.

[0034] The connecting shaft sleeve 221 is sleeved with the sleeve 211; the upper end of the connecting shaft sleeve 221 is fixedly connected to the knob 22, and a flange for axially limiting the lower shell 21 is provided at the lower end of the connecting shaft sleeve 221.

[0035] The driven gear member 3 includes a toothed ring and a top wall, and a fan-shaped hollow 32 is provided on the top wall around the connecting shaft sleeve 221; a blocking post 224 is provided on the knob 22; the end of the blocking post 224 is located inside the fan-shaped hollow 32.

[0036] The mounting base 1 is axially movably engaged with the bottom of the lower case 21; the bottom of the lower case 21 is coaxially sleeved with the mounting base 1; an opening 11 for the gas stove switch shaft to pass through is provided at the bottom of the mounting base 1; 4 limiting buckles 12 are provided around the opening 11 at the bottom of the mounting base 1, and jacks 215 corresponding to the limiting buckles 12 are provided at the bottom of the lower case 21; the limiting buckles 12 are snapped into the jacks 215 to limit the maximum amplitude of the axial movement between the mounting base 1 and the lower case 21.

[0037] The mounting base 1 is circumferentially limited and engaged with the bottom of the lower case 21; guide ribs 13 are provided on the inner wall of the mounting base 1; guide grooves 216 cooperating with the guide ribs 13 are provided on the outer wall of the lower case 21.

[0038] A detachable sleeve 225 cooperating with the gas stove switch shaft is coaxially provided in the connecting shaft sleeve 221; a depth adjusting bolt 226 is provided in the detachable sleeve 225; an internal thread section threadedly cooperating with the depth adjusting bolt 226 is provided at the upper end of the detachable sleeve 225; the cross-section of the lower end opening of the detachable sleeve 225 matches the cross-section of the gas stove switch shaft; the minimum inner diameter of the internal thread section of the detachable sleeve 225 is greater than the maximum outer diameter of the gas stove switch shaft.

[0039] The cross-section contour of the outer wall of the detachable sleeve 225 is in the shape of a centrally symmetric gear, and the cross-section of the sleeve hole of the connecting shaft sleeve 221 matches it. Thus, the detachable sleeve 225 can be inserted into the sleeve hole of the connecting shaft sleeve 221 at different installation angles. Since most of the cross-sections of the gas stove switch shafts on the market are in the shape of a "D", the directionality in the closed-fire state is different. The setting of the detachable sleeve 225 can remove the directionality when sleeving the gas stove switch shaft during installation, so as to facilitate the adjustment of the installation angle of the gas stove timer. After installation, the detachable sleeve 225 is circumferentially limited within the connecting shaft sleeve 221.

[0040] The maximum adjustable depth of the detachable sleeve 225 is greater than the length of the gas stove switch shaft.

[0041] The controller can be an embedded microcontroller, i.e., an MCU. The timer can be a mechanical timer in the prior art or an electronic timer module, or an MCU with an integrated timer peripheral can be used. In this case, the timer inside the MCU can be directly used, such as an STM32 series microcontroller. This embodiment uses a timer integrated inside the controller. The timing function of the utility model can use a prior art module. This embodiment does not limit the timing function of the utility model. The knob 22 is also provided with a display screen 227, a power supply 228, and a potentiometer electrically connected to the controller; the display screen 227 is used to display the time of the timer; the potentiometer input shaft is connected to the adjustment knob 229 for adjusting the timing time; the motor 212 is connected to the driving gear 213 through a gear reduction box. The side wall of the knob 22 is provided with a texture for increasing the friction of manual rotation. This embodiment is achieved by adding a cover shell with a pattern on the side wall, and its upper surface is provided with a protective cover plate of a transparent display screen 227 and an opening that cooperates with the adjustment knob 229. The electronic components in this embodiment are all arranged on a circuit board in the knob 22. Preferably, the circuit board is also provided with a buzzer and a motor terminal 2210. The wires of the motor 212 pass through the fan-shaped hollow 32 and are connected to the motor terminal 2210. In order to avoid the motor terminal 2210 blocking the rotation angle of the driven gear member 3, a notch for accommodating the motor terminal 2210 is provided on the top wall of the driven gear member 3 in this embodiment. The notch is connected to the fan-shaped hollow 32. Figures 9-10 shown.

[0042] The maximum amplitude of the axial movement of the lower shell 21 relative to the mounting base 1 is greater than the ignition pressing stroke of the gas stove switch shaft. The design of the detachable sleeve 225 can further expand the universality of the gas stove positioner. For different gas stove switch shafts, only detachable sleeves 225 accessories with different inner cavity shapes need to be equipped, without replacing the entire machine.

[0043] At the same time, after the limiting buckle 12 is buckled into the insertion hole 215, since the end of the limiting buckle 12 has a flange, it elastically deforms and inserts into the insertion hole 215. The axial movement stroke is the length from the bottom end of the limiting buckle 12 to the lower end of the flange. When the lower shell 21 moves upward relative to the mounting base 1 until the lower end surface of the flange buckles the upper end surface of the insertion hole 215, it reaches the highest point, thereby ensuring that the axial movement of the lower shell 21 will not separate from the mounting base 1.

[0044] The bottom of the mounting base 1 is fixed to the gas stove by double-sided adhesive.

[0045] The upper end of the depth adjustment bolt 226 is provided with an internal hexagonal adjustment hole, and the knob 22 is provided with an opening communicating with the internal hexagonal adjustment hole. In this embodiment, the opening is arranged at the bottom of the installation box of the power supply 228. The depth of the depth adjustment bolt 226 from the lower end opening of the detachable sleeve 225 is adjusted by a screwdriver. The specific adjustment hole structure and adjustment method of the above-mentioned depth adjustment bolt 226 do not limit the protection scope of the present invention. As long as the adjustment of the depth adjustment bolt 226 can be achieved by equivalent means, it is within the protection scope of the present invention.

[0046] Combined with Figures 8-10 Describe the installation and working principle of this embodiment: First, adjust the knob 22 of the gas stove timer so that the angular position of the knob 22 relative to the lower case 21 is the off position. In this embodiment, when the knob 22 rotates to trigger the micro switch by the protrusion 214; the angular position of the knob 22 relative to the lower case 21 is the off position of the gas stove switch shaft.

[0047] Then, with the gas stove switch shaft in the off state, first remove the detachable sleeve 225 and put it on the gas stove switch shaft, and then insert the detachable sleeve 225 into the connecting shaft sleeve 221 of the gas stove timer as much as possible while ensuring that the display screen 227 is facing the user upright; adjust the depth adjustment bolt 226 according to the length of the gas stove switch shaft so that the bottom surface of the installation base 1 can be glued and fixed to the gas stove tabletop in the natural extension state of the gas stove switch shaft, and after installation, the lower case 21 is relative to the installation base 1 as Figure 8 shown in the highest position. Specifically, the installation base 1 and the gas stove tabletop can be fixed by double-sided tape matching the shape of the bottom surface of the installation base 1.

[0048] When the controller in the knob 22 detects that the micro switch is triggered by the protrusion 214, it controls the motor 212 to drive the driving gear 213 to rotate the driven gear part 3 counterclockwise (from a top view angle) until the protrusion 31 triggers the touch switch and then stops rotating; at this time, the driven gear part 3 reaches a preset reset angle relative to the knob 22. At this time, the blocking column 224 contacts the top wall edge of one end of the fan-shaped hollow 32.

[0049] To help understand the driving principle of the present invention, the positions of the gear components and sensors relative to the lower case 21 after installation are as shown in the schematic Figure 10 shown (a cross-sectional view from a top view angle). According to the above steps, the positional relationship of the gear components and sensors after installation is as Figure 10As shown, when the knob 22 is pressed and rotated counterclockwise, the lower housing 21 slides downward relative to the mounting base 1; when the knob 22 presses down the gas stove switch shaft through the detachable sleeve 225 to ignite the fire, it drives the micro switch, the touch switch and the blocking post 224 to rotate counterclockwise together; the micro switch moves away from the protrusion 214, and the end of the blocking post 224 rotates along the fan-shaped hollow 32 and approaches the top wall edge at the other end of the fan-shaped hollow 32. In this embodiment, the maximum angle turned by the blocking post 224 when it rotates from the top wall edge at one end of the fan-shaped hollow 32 to the top wall edge at the other end is 190°. The potentiometer is adjusted by the adjustment knob 229, and the controller sets the timing time of the timer according to the input of the potentiometer. After the timing time arrives, the controller controls the motor 212 to rotate, driving the driving gear 213 to rotate clockwise. The driving gear 213 drives the driven gear member 3 to rotate clockwise until the top wall contacts the blocking post 224. At this time, the top wall of the driven gear member 3 will drive the blocking post 224 to drive the knob 22 to rotate clockwise. When it rotates to the point where the micro switch is triggered by the protrusion 214; at this time, the gas stove switch shaft has closed the gas, and then the motor 212 is controlled to drive the driving gear 213 to rotate the driven gear member 3 counterclockwise until the bump 31 triggers the touch switch and then stops rotating; at this time, the driven gear member 3 reaches the preset reset angle relative to the knob 22, and the gas stove timer returns to the initial state.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0051] For those skilled in the art, various changes and corrections will undoubtedly be obvious after reading the above description. Therefore, the appended claims should be regarded as covering all changes and corrections that embrace the true spirit and scope of the present invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to still fall within the spirit and scope of the present invention.

Claims

1. A gas stove timer, characterized in that: The invention comprises a mounting base (1) and a movable body (2) which can move axially along the mounting base (1); the movable body (2) comprises a lower shell (21) and a knob (22) which are coaxially arranged; the knob (22) and the lower shell (21) are rotatably matched; the knob (22) is provided with a connecting sleeve (221) which is matched with the switch shaft of the gas stove; a driven gear member (3) is coaxially arranged inside the knob (22); the driven gear member (3) and the knob (22) are rotatably matched; A sleeve (211) rotatably matched with the connecting shaft sleeve (221) is provided in the lower shell (21); a motor (212) is provided in the lower shell (21); an output shaft of the motor (212) is connected to a driving gear (213); the driving gear (213) is meshed with the driven gear member (3); The knob (22) is provided with a controller, a timer, and a flame-off sensor (222); the timer, the flame-off sensor (222), and the motor (212) are all electrically connected to the controller.

2. The gas stove timer according to claim 1, characterized in that: The fire-off sensor (222) is a micro switch, and the sleeve (211) is provided with a protrusion (214) that cooperates with the micro switch; when the knob (22) is rotated until the micro switch is triggered by the protrusion (214), the angular position of the knob (22) relative to the lower shell (21) is the fire-off position of the gas stove switch shaft.

3. The gas stove timer according to claim 2, characterized in that: The knob (22) is also provided with a gear reset sensor (223) electrically connected to the controller; the gear reset sensor (223) is used to detect whether the driven gear member (3) has reached a preset reset angle relative to the knob (22).

4. The gas stove timer according to claim 3, characterized in that: The gear reset sensor (223) is a touch switch, and the driven gear member (3) is provided with a protrusion (31) that cooperates with the touch switch; when the driven gear member (3) rotates until the protrusion (31) triggers the touch switch, the driven gear member (3) reaches a preset reset angle relative to the knob (22).

5. The gas stove timer according to claim 1, characterized in that: The driven gear member (3) is axially limited between the lower shell (21) and the knob (22); the side wall of the driven gear member (3) is rotatably matched with the lower shell (21).

6. The gas stove timer according to claim 1, characterized in that: The connecting sleeve (221) is sleeved with the sleeve (211); the upper end of the connecting sleeve (221) is fixedly connected to the knob (22), and the lower end of the connecting sleeve (221) is provided with a flange for axially limiting the lower shell (21).

7. The gas stove timer according to claim 1, characterized in that: The driven gear member (3) comprises a gear ring and a top wall, the top wall being provided with a fan-shaped hollow (32) surrounding the connecting shaft sleeve (221); a blocking column (224) being provided on the knob (22); and an end of the blocking column (224) being located in the fan-shaped hollow (32).

8. The gas stove timer according to claim 4, characterized in that: The mounting base (1) cooperates with the bottom of the lower shell (21) for axial movement; the bottom of the lower shell (21) is coaxially sleeved with the mounting base (1); the bottom of the mounting base (1) is provided with an opening (11) for the gas stove switch shaft to pass through; the bottom of the mounting base (1) is provided with a plurality of limit buckles (12) around the opening (11); the bottom of the lower shell (21) is provided with a plug hole (215) corresponding to the limit buckle (12); the limit buckle (12) is buckled into the plug hole (215) to limit the maximum amplitude of the axial movement of the mounting base (1) and the lower shell (21); the mounting base (1) cooperates with the bottom of the lower shell (21) in circumferential limit direction; the inner wall of the mounting base (1) is provided with a guide rib (13); the outer wall of the lower shell (21) is provided with a guide groove (216) cooperating with the guide rib (13).

9. The gas stove timer according to claim 8, characterized in that: A detachable sleeve (225) coaxially arranged inside the connecting shaft sleeve (221) and cooperating with the gas stove switch shaft, wherein a depth adjustment bolt (226) is arranged inside the detachable sleeve (225); an internal thread section threadably cooperating with the depth adjustment bolt (226) is arranged at the upper end of the detachable sleeve (225); a cross section of an opening at the lower end of the detachable sleeve (225) matches a cross section of the gas stove switch shaft; and a minimum inner diameter of the internal thread section of the detachable sleeve (225) is greater than a maximum outer diameter of the gas stove switch shaft.

10. The gas stove timer according to claim 1, characterized in that: The knob (22) is also provided with a display screen (227) electrically connected to the controller, a power supply (228) and a potentiometer; the display screen (227) is used to display the time of the timer; the potentiometer input shaft is connected to the adjustment knob (229) for adjusting the timing time; the motor (212) is connected to the driving gear (213) via a gear reduction box.

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