CN212901620U

CN212901620U - Gas stove timer

Info

Publication number: CN212901620U
Application number: CN202022047493.8U
Authority: CN
Inventors: 黄万里
Original assignee: Chunan Qiandaohu Perfect Electronic Technology Co ltd
Current assignee: Chunan Qiandaohu Perfect Electronic Technology Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-04-06
Anticipated expiration: 2030-09-17

Abstract

The utility model 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 the 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 utility model relates to a gas utensil control technology, especially a gas-cooker timer.

Background

Although the gas stove timer in the disclosed technology has various forms, the gas stove timer is mature and practical, such as a pure mechanical product with the patent publication number of CN2120977U, the gas stove timer comprises a bottom plate, a timer, a positioning rod, a pressure spring and a switch clamp, wherein the positioning rod is a steel sheet with sawteeth, one end of the positioning rod is provided with a long hole, and the positioning rod is provided with the tension spring and a steel wire rope; the positioning rod uses the rivet as a pivot to move left and right, and the switch of the gas cooker is closed by using the tension spring. If the patent publication number is CN2911483Y, the supporting rod is sleeved on the shaft, one side of the supporting rod is provided with a convex tip matching with the notch of the turntable, the other side of the supporting rod is connected with the air inlet switch, the connecting hose is arranged in the shell of the mechanical timer, one end of the connecting hose is communicated with the air outlet connector, and the other end of the connecting hose is communicated with the outlet end of the air inlet switch. And for electric control, for example, patent publication No. CN202338928U, a gas cooker timing device comprises a power supply, a timer and a motor, wherein the positive pole of the power supply is connected with the positive pole of the timer, the negative pole of the timer is connected with the positive pole of the motor, the negative pole of the motor is connected with the negative pole of the power supply, the rotating shaft of the motor is externally connected with a rotating switch of a gas cooker switch, and the rotating shaft of the motor and the rotating shaft of the gas cooker switch rotate coaxially. These products suffer mainly from the following problems: for low-cost products, the accuracy of purely mechanical time measurement is low, an excessively complex structure is not favorable for volume miniaturization, an excessively simple structure is poor in transmission stability, power consumption is large, and the service life is short.

Disclosure of Invention

The utility model aims at solving the above problem, provide a gas-cooker timer, it has stability height, according to different culinary art article self-selection delay number of hours, adapts to safe ignition's supporting, and rotation angle is big, and sensitivity is high, characteristics such as gas valve is closed thoroughly.

The above technical problem of the present invention can be solved by the following technical solutions: a gas stove timer comprises a box body and a circuit board arranged in the box body, and is characterized in that a rotary shaft is arranged in the box body, one end of the rotary shaft is provided with a connecting body matched with a gas valve of a gas stove, and the other end of the rotary 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.

In the aforementioned gas range timer, preferably, the motor is provided with a transmission mechanism for limiting a rotation direction; the connecting body of the rotary shaft and the gas valve of the gas stove is engaged through a clutch mechanism.

In the aforementioned timer for a gas stove, preferably, the transmission mechanism includes a gear box, and the rotating shaft is disposed in the gear box in a penetrating manner; the output shaft of the motor is provided with a worm which drives a worm wheel, and the worm wheel drives a main gear sleeved on the rotary shaft through a gear set.

In the aforementioned timer for a gas stove, preferably, the rotating shaft is provided with a return spring, an inner hole of the main gear is provided with a clutch tooth hole, the rotating shaft is provided with a guide section with a thickness more than twice that of the main gear, and a clutch rack engaged with the clutch tooth hole of the main gear is arranged on the circumference of the guide section.

In the aforementioned timer for a gas stove, preferably, the number of teeth of the clutch rack is less than the number of teeth of the clutch tooth hole of the main gear, the clutch rack is uniformly distributed on the circumference of the guide section, and one end of the clutch rack facing the knob is a conical tip.

In the 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 which are matched with the circuit board.

In the gas stove timer, preferably, the circuit board is provided with a USB socket, and 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 timer for the gas stove, preferably, the bottom of the box body is provided with a bottom cover, and the bottom cover is provided with a plug-in hole of the height adjusting block.

In the aforementioned timer for a gas stove, 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, a motor fixing seat is arranged in the upper gear box body, and a return spring hole seat is arranged in the lower gear box body; the reset spring is a conical pressure spring.

In the gas stove timer, preferably, when the timer counts down to 00: 0000, the buzzer alarms, and the timing control main IC outputs a signal to turn on the switching tube Q1, so that the power voltage is input to the input end of the voltage boosting circuit, and the voltage boosting output is connected with the motor B1 to start the motor to rotate; when the valve of the gas stove is closed and the motor cannot be driven continuously, the control end of the switching tube Q3 generates high level to enable the switching tube Q3 to be conducted, after the input end of the timing control main IC receives a low electric signal, the output signal is closed to enable the switching tube Q1 to be disconnected, the booster circuit loses power, and the motor stops rotating.

The technical scheme is that the 'gas stove timer' is designed into a complete product and can be used in control switches of various gas stoves in the market, all functional elements such as a circuit board, a rotating shaft and the like are arranged in a box body, wherein one end of the rotating shaft extends out of the box body to be matched with a gas valve, and the other end of the rotating shaft also extends out of the box body to be connected with a manual knob. The rotary shaft is driven by a motor and a transmission mechanism, the motor is controlled by a circuit board (including an integrated block) control system to set parameters such as running time, and after the motor is started, the automatic shutdown can be realized only when the load current of the motor exceeds the rated current, so that the gas valve is ensured to be completely closed.

The rotary shaft of the device is limited in rotation direction by the transmission mechanism, output power and unidirectional rotation are guaranteed by the rotation mechanism, rotation uncertainty caused by reverse rotation of the rotary shaft is avoided, the rotary shaft and a connector matched with a gas valve are engaged through the clutch mechanism, during ignition, the manual knob is pressed down to enable the transmission mechanism to be separated from the rotary shaft, and the rotary shaft is engaged with the transmission mechanism through the clutch mechanism after ignition is finished, so that the purpose of automatically and regularly closing the gas valve is achieved.

Furthermore, the transmission mechanism is mainly arranged in a gear box, a rotary shaft penetrates through the gear box, the unidirectional rotation of the rotary shaft is completed by a worm on an output shaft of the motor and an intermediate worm wheel, and then the power is transmitted to the gear set by the worm wheel. The upper and lower clutch mechanisms of the rotary shaft are mainly realized by a return spring and a main gear, and the clutch mechanism is simple in structure, flexible and durable. And the inner hole of the main gear is provided with a clutch tooth hole, the circumference of the guide section of the rotating shaft is provided with a clutch rack matched with the clutch tooth hole, and the structure with few teeth and a guide cone tip ensures that the rotating shaft can be easily and smoothly clutched up and down.

The device is simple to operate, the top surface of the box body is provided with a panel, and the panel is provided with various functional switches, a display screen, a buzzer and other adjusting and prompting elements; still be equipped with USB socket, dispose waterproof cover, satisfy the kitchen environment and charge mouthful protection needs down.

It is worth noting that in order to meet the requirements of ignition control switches of gas cookers with different heights, an auxiliary insertion hole is formed in the bottom cover at the bottom of the box body, and height adjusting blocks with different types can be selected according to the actual height of the ignition control switch to be installed quickly.

Compared with the prior art, the beneficial effects of the utility model are that: 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.

Drawings

Fig. 1 is a schematic view of an external structure of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 and 4 are schematic diagrams of an internal layout and an 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 a rotating shaft structure of the present invention.

Fig. 7 is a perspective view of the internal structure of the gear box according to the present invention.

Fig. 8 is an exploded view of the present invention.

Fig. 9 is a circuit diagram of a close control circuit according to the present invention.

In the figure: 1. the technical scheme includes that the novel electric bicycle comprises a knob, a box body, a panel, a 2011 touch switch, 2012 a waterproof cover, a 2013 display screen, a 2014 a buzzer, a 202 motor, a 203 gear box, a 2031 gear set, a 2032 lower gear box body, a 2033 upper gear box body, a 204 circuit board, a 205 bottom cover, a 206 reset spring, 207 a rotating shaft, a 2071 knob shaft head, a 2072 guide section, a 2073 limit shoulder, a 2074D-type outer connecting hole, a 3 height adjusting block and a 4 battery.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

The appearance of the gas stove timer is shown in figures 1 and 2, and the gas stove timer comprises a box body 2, wherein the upper end of the box body 2 is provided with a knob 1 connected with a rotary shaft 207, and the lower end of the box body 2 is connected with a height adjusting block 3. The top surface of the box body 2 is provided with a panel 201, the panel 201 is provided with a touch switch 2011 matched with the circuit board 204, and the touch switch 2011 comprises a starting button, a set time value [ hour: minute: second ], clearing, "+", "-" and other basic function keys; the LCD display screen 2013 can display the time value, the power supply electric quantity, the work indicator light and other contents; and a 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 formed by a main box including a panel 201 and a bottom cover 205 positioned at the bottom of the main box, and a circuit board 204 is fixed at the bottom of the main box of the box body 2 and is close to the panel 201. The rotary shaft 207 is arranged by taking the center of the box body 2 as an axis, and the lower end of the rotary shaft 207 is provided with a connecting body matched with a gas valve of a gas stove. The motor is set for run time by the control system. The bottom cover 205 of the box body 2 is provided with a plug-in hole of the height adjusting block 3, and the height adjusting block 3 is provided with a pin matched with the plug-in hole.

The rotating shaft 207 is driven by the motor 202 through a transmission mechanism, the rotation direction is limited by the transmission mechanism, and the connecting body of the rotating shaft 207 and the gas valve of the gas stove are engaged through a clutch mechanism. As shown in fig. 3 to 5, the transmission mechanism mainly includes a gear box 203, in which a rotating shaft 207 is inserted; the output shaft of the motor 202 is provided with a worm, which drives a worm wheel, which drives a main gear sleeved on the rotating shaft 207 through a gear set 2031. The structure of the rotating shaft 207 is shown in fig. 6, and is divided into an upper section and a lower section by taking a limiting shoulder 2073 as a boundary, the lower section is sleeved with a return spring 206, the upper section is firstly a guide section 2072 with the thickness more than twice as large as that of the main gear, and then a knob shaft head 2071 matched with the knob 1, and a D-shaped external hole 2074 is arranged in an axial inner hole at one end matched with a gas valve of a gas stove; the master gear hole is provided with a clutch tooth hole, 3 clutch racks which are matched with the clutch tooth hole and evenly distributed on the circumference of the guide section 2072 of the rotating shaft 207 are arranged on the circumference of the guide section 2072, the length of each clutch rack is smaller than the thickness of the master gear, one end of each clutch rack facing the knob 1 is a cone tip body, and two teeth at one end of the master gear in the clutch tooth hole facing the direction of the cone tip body are of outward arc structures.

Further, the transmission mechanism includes a gear box 203, referring to fig. 7 and 8, the gear box 203 is a closed structure composed of an upper gear box 2033 and a lower gear box 2032, a motor 202 fixing seat is arranged in the upper gear box 2033 and is specially used for installing the motor 202, a return spring 206 hole seat is arranged in the lower gear box 2032, the return spring 206 hole seat is coaxial with the central axis of the box 2, and the return spring 206 is a conical compression spring.

During the use, open waterproof cover 2012 and charge, display screen 2013 shows that the full check of electric quantity finishes charging. Can be used for about 6 months. When the ignition is performed, the knob 1 is pressed down, the return spring 206 contracts simultaneously when the knob 1 is pressed down, the clutch rack on the circumference of the guide section 2072 of the rotating shaft 2072 is separated from the main gear, at the moment, the gas valve of the gas stove can be opened, the gas valve rotates to the right to start the ignition simultaneously, the size of the fire can be adjusted randomly within 180 degrees, when the hand is loosened, the spring return 206 automatically pushes up the rotating shaft 2072 to return, and the clutch rack on the circumference of the guide section 2072 is naturally meshed with the clutch rack hole (namely, tooth hanging) of the main gear. When the count-down reaches 00: 00: and when 00, the buzzer alarms, and meanwhile, the motor 202 starts to close the gas valve and flameout. The user sets the off time by touching the switch 2011.

The gas stove closing control circuit is shown in figure 9: the timing control circuit comprises a timing control chip U1, a motor power supply circuit and a motor voltage feedback circuit, wherein an output end of the timing control chip U1 is connected to a control end of a switch tube Q1 of the motor power supply circuit, the motor voltage feedback circuit comprises a voltage sampling circuit connected to an input end of the timing control chip U1, and the voltage sampling circuit is provided with a switch tube Q3 of which the control end is connected to a motor B1. The voltage sampling circuit comprises a switch tube Q3 with one end connected with a power supply through a resistor and the other end grounded, and the connection end of the resistor and the switch tube Q3 is connected to one input end of a timing control chip U1. The control end of the switching tube Q1 is grounded after passing through the resistor and the triode Q6 in sequence, and the base electrode of the triode Q6 is connected to one output end 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: 0000, the buzzer in the sound alarm circuit alarms, and U1 outputs a signal to turn on Q1, the power voltage is input to the input end of the booster circuit, the booster output 6V is connected with the motor B1, and the motor starts to rotate. When the valve of the gas stove is closed and the motor is not in rotation, the control end of the Q3 generates a high level to enable the Q3 to be conducted, after the input end of the U1 receives a low electric signal, the output model is closed to enable the Q1 to be disconnected, the booster circuit loses power, the motor stops rotating, and the closing work is completed.

The above-mentioned embodiment is right the utility model discloses an explanation, any is right the utility model discloses a structure etc. after the simple transform all belong to the protection scope of the utility model.

Claims

1. A gas stove timer comprises a box body (2) and a circuit board (204) arranged in the box body, and is characterized in that a rotary shaft (207) is arranged in the box body, one end of the rotary shaft is provided with a connecting body matched with a gas valve of a gas stove, and 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, the motor is set to run time by a control system, and/or the motor is automatically stopped only when the load current of the motor exceeds the rated current.

2. The gas range timer according to claim 1, wherein the rotating shaft (207) is limited in rotating direction by a transmission mechanism, and a connecting body of the rotating shaft (207) and a gas valve of the gas range are engaged through a clutch mechanism.

3. Gas stove timer according to claim 1 or 2, characterized in that the transmission mechanism comprises a gear box (203) in which a rotary shaft (207) is arranged; the output shaft of the motor (202) is provided with a worm, the worm drives a worm wheel, and the worm wheel drives a main gear sleeved on a rotating shaft through a gear set (2031).

4. The timer for gas range as set forth in claim 3, wherein the rotating shaft (207) is provided with a return spring (206), the inner hole of the main gear is provided with a clutch tooth hole, the rotating shaft is provided with a guide section (2072) with a thickness more than twice as thick as the main gear, and the circumference of the guide section is provided with a clutch rack engaged with the clutch tooth hole of the main gear.

5. The gas stove timer according to claim 4, wherein the number of the clutch rack teeth is less than that of the clutch rack teeth of the main gear, the clutch racks are evenly distributed on the circumference of the guide section, and one end of the clutch rack facing the knob (1) is a cone-tip body.

6. The gas stove timer as claimed in claim 1, wherein the top surface of the box body (2) is provided with a panel (201), and the panel is provided with a touch switch (2011) and a display screen (2013) which are matched with the circuit board (204).

7. The gas stove timer according to claim 1 or 6, wherein the circuit board (204) is provided with a USB socket, and the box body (2) is provided with a through hole matched with the USB socket and a waterproof cover (2012) matched with the USB socket and the through hole.

8. The timer for gas cookers as claimed in claim 1 or 6, wherein the bottom of the box body (2) is provided with a bottom cover (205) which is provided with a plug hole for the height adjusting block (3).

9. The timer of the gas stove according to claim 4, characterized in that the transmission mechanism comprises a gear box (203), the gear box is composed of an upper gear box body (2033) and a lower gear box body (2032), a motor (202) fixing seat is arranged in the upper gear box body, and a reset spring (206) hole seat is arranged in the lower gear box body; the reset spring is a conical pressure spring.

10. The timer of gas range as set forth in claim 1, wherein when the timer counts down to 00: 0000, the buzzer alarms, and the timing control main IC outputs a signal to turn on the switching tube (Q1) to input the power voltage to the input terminal of the voltage boosting circuit, and the voltage boosting output is connected to the motor (202) to start the motor to rotate; when the valve of the gas stove is closed and the motor cannot be driven continuously, the control end of the switching tube (Q3) generates a high level to enable the switching tube (Q3) to be conducted, after the input end of the timing control main IC receives a low electric signal, the output signal is closed to enable the switching tube (Q1) to be disconnected, the booster circuit loses power, and the motor stops rotating.