CN112032776A - Gas stove timer - Google Patents

Abstract

The invention discloses a gas stove timer, which comprises a box body and a circuit board arranged in the box body, and is characterized in that a rotating shaft is arranged in the box body, one end of the rotating shaft is provided with a connecting body matched with a gas valve of a gas stove, and the other end of the rotating shaft is provided with a knob; the rotary shaft is driven by a motor through a transmission mechanism, the motor is set with running time by a control system, and/or the motor is automatically stopped only when the load current of the motor exceeds the rated current. The whole product has compact structure, small volume, large transmission power of the rotary shaft, high sensitivity, realization of timing and punctual complete closing of the gas valve, wide application range, stable structure and long service life.

Description

gas stove timer

technical field

The invention relates to a gas appliance control technology, in particular to a gas stove timer.

Background technique

Although there are various forms of gas stove timers in the disclosed technology, there are not many mature and practical ones, such as purely mechanical products. The patent bulletin number is CN2120977U. A gas stove timer composed of a compression spring and a switch clip, the positioning rod is a serrated steel sheet, one end of which has a long hole, and a tension spring and a wire rope are installed; the positioning rod is moved left and right with a rivet as a fulcrum. To achieve the switch to turn off the gas stove. Another example is the patent publication number CN2911483Y, the support rod is sleeved on the shaft, one side of the support rod is provided with a convex tip that matches the gap of the turntable, the other side of the support rod is connected with the air intake switch, and the connecting hose is provided. In the casing of the mechanical timer, one end of the connecting hose is communicated with the air outlet joint, and the other end of the connecting hose is communicated with the outlet end of the air intake switch. Another example is the electric control, such as the patent publication number CN202338928U, a gas stove timing device, including a power supply, a timer and a motor, the positive pole of the power supply is connected to the positive pole of the timer, the negative pole of the timer is connected to the positive pole of the motor, and the negative pole of the motor is connected. It is connected with the negative pole of the power supply, the rotating shaft of the motor is connected to the rotating switch of the gas stove switch, and the rotating shaft of the motor rotates coaxially with the rotating shaft of the gas stove switch. These products mainly have the following problems: For low-cost products, the purely mechanical time measurement accuracy is low, the overly complex structure is not conducive to volume miniaturization, the overly simple structure has poor transmission stability, and the use of large power consumption Short lifespan, etc.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems, to provide a gas stove timer, which has high stability, can choose the delay number according to different cooking products, is suitable for the matching of the safety ignition device, has a large rotation angle, high sensitivity, and a gas valve. Close completely and so on.

The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions: a gas stove timer, comprising a box body and a circuit board arranged in the box body, characterized in that the box body is provided with a rotating shaft, and the rotating shaft is arranged in the box body. One end of the shaft has a connecting body that matches the gas valve of the gas stove, and the other end of the rotary shaft is provided with a knob; the rotary shaft is driven by the motor through the transmission mechanism, and the motor is set by the control system for running time, and/only when the motor load current exceeds Automatic shutdown at rated current.

In the above-mentioned gas stove timer, preferably, the rotation direction of the motor is defined by a transmission mechanism; the connecting body of the rotary shaft and the gas valve of the gas stove is engaged by a clutch mechanism.

In the aforementioned gas cooker timer, preferably, the transmission mechanism includes a gear box, and the rotating shaft is inserted into the gear box; the motor output shaft is provided with a worm, the worm drives the worm wheel, and the worm wheel is driven and sleeved on the rotating shaft through the gear set. main gear.

In the aforementioned gas cooker timer, preferably, the rotating shaft is provided with a return spring, the inner hole of the main gear is provided with a clutch tooth hole, the rotating shaft has a guide section with a thickness of more than twice the main gear, and the circumference of the guide section is provided with a guide section. A clutch rack that fits with the main gear clutch teeth.

In the above-mentioned gas stove timer, preferably, the number of teeth of the clutch rack is less than the number of teeth of the clutch teeth of the main gear, the clutch rack is evenly distributed on the circumference of the guide segment, and the end of the clutch rack toward the knob is a cone-shaped body. .

In the aforementioned gas stove timer, preferably, the top surface of the box body is provided with a panel, and the panel is provided with a touch switch and a display screen matched with the circuit board.

In the aforementioned gas stove timer, preferably, the circuit board is provided with a USB socket, the box body is provided with a through hole matched with the USB socket and a waterproof cover matched with the USB socket and the through hole.

In the aforementioned gas stove timer, preferably, the bottom of the box body is provided with a bottom cover, and the bottom cover is provided with an insertion hole for the height adjustment block.

In the aforementioned gas stove timer, preferably, the transmission mechanism includes a gear box, the gear box is composed of an upper gear box body and a lower gear box body, the upper gear box body is provided with a motor fixing seat, and the lower gear box body is provided with a motor fixing seat. There is a return spring hole seat; the return spring is a conical compression spring.

In the aforementioned gas stove timer, preferably, when the timer counts down to 00:00 00, the buzzer alarms, and the timing control main IC outputs a signal to turn on the switch tube Q1 and input the power supply voltage to the booster circuit. At the input end, the boost output is connected to the motor B1, so that the motor starts to rotate; when the gas stove valve is closed and the motor cannot continue to drive, the control end of the switch tube Q3 generates a high level, so that the switch tube Q3 is turned on, and the timing controls the input of the main IC After the terminal receives a low power signal, the output signal is turned off to disconnect the switch tube Q1, the boost circuit loses power, and the motor stops rotating.

In this technical solution, this "gas stove timer" is designed as a complete product, which can be used in the control switches of various gas stoves on the market. All functional elements such as circuit boards and rotating shafts are arranged in the box, among which the rotating shaft One end of the shaft extends out of the box to match the gas valve, and the other end of the rotating shaft also extends out of the box to connect the manual knob. The rotating shaft is driven by the motor and the transmission mechanism. The motor is controlled by the circuit board (including the integrated block) to set parameters such as running time. After the motor is started, it will automatically stop only when the motor load current exceeds the rated current to ensure that the gas valve is completely is closed.

The rotation direction of the rotating shaft of the device is limited by the transmission mechanism, and the output power and unidirectional rotation are guaranteed by the rotating mechanism to avoid the uncertainty of the rotation direction caused by the reversal of the rotating shaft. After the meshing is completed, when igniting, the manual knob is pressed down to make the transmission mechanism disengage from the rotating shaft. When the ignition is completed, the rotating shaft is engaged with the transmission mechanism through the clutch mechanism, so as to realize the purpose of automatically closing the gas valve.

Further, the transmission mechanism is mainly set in the gear box, and the rotating shaft is installed in the gear box. The one-way rotation of the rotating shaft is completed by the worm on the output shaft of the motor and the intermediate worm gear, and then the worm gear transmits the power to the gear set. The upper and lower clutch mechanism of the rotating shaft is mainly realized by the return spring and the main gear, and the structure is simple, flexible and durable. In addition, the inner hole of the main gear is provided with a clutch tooth hole, and the circumference of the guide section of the rotating shaft is provided with a clutch rack that cooperates with the clutch tooth hole. .

The device is easy to operate. There is a panel on the top surface of the box body. The panel is provided with various function switches, as well as adjustment prompt elements such as a display screen and a buzzer. It also has a USB socket and a waterproof cover to meet the charging requirements in the kitchen environment. mouth protection required.

It is worth noting that in order to meet the requirements of the ignition control switch of gas stoves of different heights, the device is provided with an auxiliary plug-in hole on the bottom cover at the bottom of the box body, and different types of height adjustment blocks can be selected according to the actual ignition control switch height. Install quickly.

Compared with the prior art, the beneficial effects of the present invention are as follows: the whole product has a compact structure, a small volume, a large rotating shaft transmission power, a high sensitivity, a complete closing of the gas valve on time and on time, a wide application range, a stable structure, and a service life. long.

Description of drawings

FIG. 1 is a schematic diagram of an external structure of the present invention.

FIG. 2 is a plan view of FIG. 1 .

3 and 4 are schematic diagrams of an internal arrangement and internal structure of the present invention.

FIG. 5 is a schematic structural diagram of a transmission mechanism of the present invention.

FIG. 6 is a schematic view of the structure of a rotary shaft of the present invention.

FIG. 7 is a perspective view of the internal structure of a gearbox according to the present invention.

Figure 8 is an exploded view of the present invention.

FIG. 9 is a circuit diagram of a shutdown control of the present invention.

In the picture: 1. Knob, 2. Box, 201. Panel, 2011. Touch switch, 2012. Waterproof cover, 2013. Display screen, 2014. Buzzer, 202. Motor, 203. Gear box, 2031. Gear set , 2032. Lower gear box, 2033. Upper gear box, 204. Circuit board, 205. Bottom cover, 206. Return spring, 207. Rotary shaft, 2071. Knob shaft head, 2072. Guide section, 2073. Limit Shoulder, 2074.D-type external hole, 3. Height adjustment block, 4. Battery.

Detailed ways

The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

A gas stove timer, the appearance of which is shown in Figures 1 and 2, includes a main body of a box body 2, the upper end of the box body 2 is a knob 1 connected to a rotating shaft 207, and the lower end of the box body 2 is connected with a height adjustment block 3. The top surface of the box body 2 is provided with a panel 201, and the panel 201 is provided with a touch switch 2011 that cooperates with the circuit board 204. The touch switch 2011 includes a power-on button, a set time value [hour: minute: second], clear, "+", " -" and other basic function keys; LCD display screen 2013, which can display time value, power supply, working indicator, etc.; and equipped with buzzer 2014. The circuit board 204 is provided with a USB socket, the panel 201 is provided with a through hole matched with the USB socket, and the box body 2 is hung with a waterproof cover 2012 matched with the USB socket and the through hole on the panel 201 .

The box body 2 is a substantially closed square space body composed of the main box including the panel 201 and the bottom cover 205 at the bottom. The circuit board 204 is fixed on the bottom of the main box of the box body 2 and is close to the panel 201. . A rotating shaft 207 is arranged with the center of the box body 2 as the axis, and the lower end of the rotating shaft 207 has a connecting body matched with the gas valve of the gas stove. The motor has a run time set by the control system. The bottom cover 205 of the box body 2 is provided with an insertion hole for the height adjustment block 3 , and the height adjustment block 3 is provided with pins matched with the insertion hole.

The rotating shaft 207 is driven by the motor 202 through a transmission mechanism, and the rotation direction is defined by the transmission mechanism, and the connecting body of the rotating shaft 207 and the gas valve of the gas stove is engaged through a clutch mechanism. As shown in FIGS. 3 to 5 , the transmission mechanism mainly includes a gear box 203, and the rotating shaft 207 is inserted in the gear box; the output shaft of the motor 202 is provided with a worm, which drives the worm wheel, and the worm wheel is driven by the gear set 2031. Main gear on the 207. The structure of the rotating shaft 207 is shown in FIG. 6 , it is divided into upper and lower sections with the limiting shoulder 2073 as the boundary, the lower section is sheathed with a return spring 206, and the upper section is firstly a guide section 2072 with a thickness more than twice that of the main gear, and then is matched with the knob 1 The knob shaft head 2071 of the rotary shaft 2071 has a D-shaped external hole 2074 in the axial inner hole at one end that is matched with the gas valve of the gas stove; the inner hole of the main gear is provided with a clutch tooth hole, and the guide section 2072 of the rotary shaft 207 is provided with a clutch on the circumference. The gear holes are matched with 3 clutch racks evenly distributed on the circumference of the guide section 2072. The length of the clutch rack is less than the thickness of the main gear, and the end of the clutch rack facing the knob 1 is a conical tip body. An outward arc structure is formed between the two teeth at one end of the teeth towards the direction of the cone tip.

Further, the transmission mechanism includes a gear box 203, see FIGS. 7 and 8, the gear box 203 is composed of an upper gear box body 2033 and a lower gear box body 2032 to form a closed structure, and the upper gear box body 2033 is provided with a motor 202 fixing seat specially used for The motor 202 is installed, the lower gear box body 2032 is provided with a hole seat of the return spring 206, the hole seat of the return spring 206 is coaxial with the central axis of the box body 2, and the return spring 206 is a conical compression spring.

When in use, open the waterproof cover 2012 for charging, and the display screen 2013 shows that the battery is fully charged and the charging is completed. Generally, it can be used for about 6 months. When igniting, press the knob 1, when the knob 1 is pressed down, the return spring 206 shrinks down at the same time, the clutch rack on the circumference of the guide section 2072 of the rotary shaft 2072 is disengaged from the main gear, then the gas valve of the gas stove can be opened at the same time to start turning right. Ignition, and adjust the size of the fire arbitrarily within 180 degrees. When the hand is released, the spring reset 206 automatically resets the rotating shaft 2072 to the top, and the clutch rack on the circumference of the guide section 2072 naturally meshes with the main gear clutch gear hole ( i.e. hanging teeth). When the countdown reaches 00:00:00, the buzzer alarms, and the motor 202 starts to close the gas valve and turn off the flame. The user sets the shutdown time by touching the switch 2011 .

The gas stove shutdown control circuit, as shown in Figure 9, includes a timing control chip U1, a motor power supply circuit and a motor voltage feedback circuit. An output end of the timing control chip U1 is connected to the control end of the switch tube Q1 of the motor power supply circuit, and the motor voltage The feedback circuit includes a voltage sampling circuit connected to one input end of the timing control chip U1, and the voltage sampling circuit is provided with a switch tube Q3 whose control end is connected to the motor B1. The voltage sampling circuit includes a switch tube Q3 whose one end is connected to the power supply through a resistor and the other end is grounded. The connection end of the resistor and the switch tube Q3 is connected to an input end of the timing control chip U1. The control terminal of the switch tube Q1 is connected to ground through the resistor and the transistor Q6 in sequence, and the base of the transistor Q6 is connected to an output terminal of the timing control chip U1 through the resistor.

The working principle is as follows: U1 is a timing control chip. When the countdown reaches 00:00 00, the buzzer in the sound alarm circuit will give an alarm. At the same time, U1 outputs a signal to turn on Q1, and the power supply voltage is input to the input terminal of the booster circuit. The voltage output 6V turns on the motor B1, so that the motor starts to rotate. When the gas stove valve is closed and the motor does not turn, the control terminal of Q3 generates a high level, which makes Q3 conduct. After receiving a low-power signal at the input terminal of U1, the output model is closed to disconnect Q1, and the booster circuit loses power. The motor stops rotating to complete the shutdown.

The above-mentioned embodiment is an illustration of the present invention, and any simple transformation process, method, structure, etc. of the present invention belong to the protection scope of the present invention.

Claims (10)

1. A gas cooker timer, comprising a box body (2) and a circuit board (204) arranged in the box body, characterized in that the box body is provided with a rotating shaft (207), and one end of the rotating shaft has a connection with the gas The connecting body to which the gas valve of the stove is matched, the other end of the rotary shaft is provided with a knob (1); the rotary shaft is driven by a motor (202) through a transmission mechanism, and the motor is set by the control system for the running time, and/only when the motor load current exceeds Automatic shutdown at rated current. 2 . The gas cooker timer according to claim 1 , wherein the rotation direction of the rotary shaft ( 207 ) is defined by a transmission mechanism, and the connecting body between the rotary shaft ( 207 ) and the gas valve of the gas cooker passes through a clutch mechanism. 3 . mesh. 3. The gas cooker timer according to claim 1 or 2, characterized in that the transmission mechanism comprises a gear box (203), and the rotary shaft (207) passes through the gear box; the motor (202) is on the output shaft A worm is provided, the worm drives a worm wheel, and the worm wheel drives a main gear sleeved on the rotating shaft through a gear set (2031). 4. The gas cooker timer according to claim 3, wherein a return spring (206) is arranged on the rotating shaft (207), a clutch tooth hole is arranged in the inner hole of the main gear, and the rotating shaft has two main gears. A guide section (2072) with a thickness of more than twice the thickness of the guide section is provided on the circumference of the guide section with a clutch rack matched with the clutch gear hole of the main gear. The gas cooker timer according to claim 4, wherein the number of teeth of the clutch rack is less than the number of teeth of the clutch teeth of the main gear, the clutch rack is evenly distributed on the circumference of the guide section, and the clutch rack faces One end of the knob (1) is a cone. 6 . The gas cooker timer according to claim 1 , wherein a panel ( 201 ) is provided on the top surface of the box body ( 2 ), and a touch switch ( 2011 ) matched with the circuit board ( 204 ) is provided on the panel. 7 . ) and Display (2013). 7. The gas cooker timer according to claim 1 or 6, characterized in that, a USB socket is provided on the circuit board (204), and a through hole matched with the USB socket is provided on the box body (2) and a socket is provided on the box body (2). The USB socket and the through-hole matching waterproof cover (2012). 8. The gas stove timer according to claim 1 or 6, characterized in that a bottom cover (205) is provided at the bottom of the box body (2), and the bottom cover is provided with an insert for a height adjustment block (3). hole. 9. The gas cooker timer according to claim 4, wherein the transmission mechanism comprises a gear box (203), and the gear box is composed of an upper gear box (2033) and a lower gear box (2032), and the upper The gear box body is provided with a motor (202) fixing seat, and the lower gear box body is provided with a return spring (206) hole seat; the return spring is a conical compression spring. 10. The gas stove timer according to claim 1, wherein when the timer counts down to 00:00 00, the buzzer alarms, and the timing control main IC outputs a signal to make the switch tube (Q1) conductive at the same time , input the power supply voltage to the input terminal of the booster circuit, and the booster output is connected to the motor B1 (202), so that the motor starts to rotate; when the gas stove valve is closed and the motor cannot continue to drive, the control terminal of the switch tube (Q3) generates a high voltage level, the switch tube (Q3) is turned on, the timing control main IC input terminal receives a low-power signal, and the output signal is turned off to disconnect the switch tube (Q1), the boost circuit loses power, and the motor stops rotating.

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