Gas stove

Abstract

The invention relates to the technical field of kitchen appliances, in particular to a gas stove. The gas stove comprises a temperature control probe, a driving mechanism, a knob and a control panel, and the temperature control probe is coaxially inserted into a center hole of a burner of the gas stove and extends into the gas stove to be connected with the driving end of the driving mechanism, so that the temperature control probe is driven by the driving mechanism to ascend and descend; the control panel is arranged in the gas stove, the knob is mounted on the panel, and the knob can be in communication connection with the driving mechanism through the control panel, so that the control panel can receive a signal from the knob and send the signal to the driving mechanism according to the rotating direction of the knob, and the temperature control probe is driven to ascend and descend through the driving mechanism; therefore, according to the gas stove, the mounting height of the temperature control probe can be flexibly adjusted conveniently and quickly so as to adapt to different use environments.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a gas stove. Background Technology

[0002] Currently, gas stoves on the market with anti-dry-burning temperature control probes cannot flexibly adjust the installation height of the temperature control probe according to the different materials and shapes of the cookware used, resulting in many problems during use. For example, the temperature control probe cannot accommodate both flat-bottomed and round-bottomed pans at the same installation height. Also, when using non-metallic cookware such as clay pots, the temperature control probe is prone to overheating and triggering the protection function under high heat, causing the gas stove to shut off midway. Summary of the Invention

[0003] The purpose of this invention is to provide a gas stove that allows for convenient and quick adjustment of the installation height of the temperature control probe.

[0004] This invention provides a gas stove, including a temperature control probe, a drive mechanism, a knob, and a control panel;

[0005] The drive mechanism is located inside the gas stove, and the temperature control probe is coaxially inserted into the center hole of the burner of the gas stove. The lower end of the temperature control probe is connected to the drive end of the drive mechanism so that the temperature control probe can be driven to move up and down through the drive mechanism.

[0006] The control panel is located inside the gas stove, and the knob is installed on the panel of the gas stove. The knob can communicate with the drive mechanism through the control panel to adjust the temperature control probe by raising and lowering it.

[0007] Furthermore, the gas stove is provided with a nozzle seat, which is disposed opposite to the burner, and the nozzle seat is supported on the bottom shell of the gas stove by a support leg;

[0008] The drive mechanism is located below the nozzle seat and fixed to the bottom shell. The nozzle seat has a through hole for the temperature control probe to pass through.

[0009] Furthermore, a guide seat is fastened to the nozzle seat. The guide seat includes a first guide portion and a second guide portion that engage with each other. A guide through hole is formed between the first guide portion and the guide portion. The temperature control probe passes through the guide through hole with a clearance fit.

[0010] Furthermore, the driving end of the driving mechanism is provided with a connecting rod, and the end of the connecting rod away from the driving mechanism is provided with a connecting seat. The mounting seat includes a first connecting part and a second connecting part. The first connecting part is connected to the connecting rod, and the second connecting part is fastened to the first connecting part. A mounting hole for clamping the temperature control probe is formed between the first connecting part and the second connecting part.

[0011] Furthermore, the driving mechanism can drive the temperature control probe to switch between a second position, a first position, and a third position from high to low;

[0012] In the first and second positions, the upper end of the temperature control probe extends out of the burner; in the third position, the temperature control probe retracts into the burner.

[0013] Furthermore, the control board is configured to have a switchable first control mode and a second control mode;

[0014] In the first control mode, the knob is communicatively connected to the ignition mechanism of the gas stove through the control board, so as to ignite, turn off and adjust the flame of the gas stove through the knob;

[0015] When the control panel is switched to the second control mode, the knob is communicatively connected to the drive mechanism through the control panel.

[0016] Furthermore, the control board is connected to a keypad, which is mounted on the panel of the gas stove and has touch-sensitive function switching keys.

[0017] The control panel is configured such that when the gas stove is in the ignition state, touching the function switch key will allow the control panel to switch from the first control mode to the second control mode.

[0018] Furthermore, the control board is configured such that, in the second control mode, when the knob is rotated, the control board can adjust the raising and lowering of the temperature control probe according to the direction of rotation of the knob.

[0019] The control panel is configured such that, in the second control mode, if the control panel does not receive a signal from the knob within a predetermined time, the control panel automatically switches back to the first control mode from the second control mode.

[0020] Furthermore, the control board is configured as follows:

[0021] When the gas stove is in the off state, the control panel is in the first control mode. Pressing and rotating the knob controls the ignition mechanism of the gas stove to ignite the gas stove.

[0022] When the gas stove is in the ignition-completed working state and the control panel is in the first control mode, rotating the knob will control the firepower of the gas stove according to the rotation direction of the knob.

[0023] When the gas stove is in the ignition-completed working state and the control panel is in the first control mode, pressing down and holding the knob for a predetermined time will cause the control panel to control the ignition mechanism to turn off the gas stove.

[0024] Furthermore, the knob is an encoder knob, and the knob includes a housing, a fixed shaft, an encoder, and a circuit board;

[0025] The fixed shaft is fixedly mounted on the panel of the gas stove. The encoder includes an inner stator and an outer rotor that can rotate relative to each other. The inner stator is slidably mounted on the fixed shaft. The outer shell is mounted on the outer rotor. The outer shell can drive the outer rotor to rotate relative to the inner stator.

[0026] The circuit board is located inside the housing, and a switch is electrically connected to the position of the circuit board opposite to the fixed shaft. Pressing down on the housing can cause the fixed shaft to touch the switch.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] The gas stove provided by this invention includes a temperature control probe, a drive mechanism, a knob, and a control board. The drive mechanism is located inside the gas stove, and a burner is mounted on the gas stove's panel. The temperature control probe is coaxially inserted into the central hole of the burner and extends into the gas stove's interior, connecting to the drive end of the drive mechanism. This allows the temperature control probe to rise and fall under the drive of the drive mechanism, enabling its upper end to extend beyond the burner at different heights or retract completely into the burner. The control board is located inside the gas stove, while the knob is located outside the gas stove and mounted on its panel. Both the knob and the drive mechanism are communicatively connected to the control board. The knob can communicate with the drive mechanism through the control board, allowing the control board to receive signals from the knob and send signals to the drive mechanism according to the knob's rotation direction. This, in turn, drives the temperature control probe to rise; for example, rotating the knob clockwise raises the temperature control probe, while rotating it counterclockwise lowers it. Therefore, the gas stove of this application allows for convenient and quick adjustment of the temperature control probe's installation height to adapt to different usage environments. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall assembly of a gas stove provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the gas stove assembly provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the temperature control probe and drive mechanism at the nozzle seat provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the temperature control probe and drive mechanism provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of a knob provided in an embodiment of the present invention.

[0035] Figure label:

[0036] 1-Panel, 2-Knob, 21-Fixed Shaft, 22-Inner Stator, 23-Outer Rotor, 24-Circuit Board, 25-Housing Shell, 3-Burner, 4-Temperature Control Probe, 5-Bottom Shell, 6-Nozzle Seat, 61-Electrode Needle, 62-Guide Seat, 63-Thermocouple, 7-Drive Mechanism, 71-Connecting Rod, 72-First Connecting Part, 73-Second Connecting Part, 8-Control Board, 9-Button Board. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0039] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The following reference Figures 1 to 5 This application describes a gas stove according to some embodiments.

[0043] This application provides a gas stove, such as Figure 1 and Figure 2 As shown, the gas stove includes a temperature control probe 4 and a drive mechanism 7. The drive mechanism 7 is located inside the gas stove. The gas stove panel 1 is equipped with a burner 3. The temperature control probe 4 is coaxially inserted into the central hole of the burner 3 and extends into the interior of the gas stove, connecting with the drive end of the drive mechanism 7. This allows the temperature control probe 4 to rise and fall under the drive of the drive mechanism 7, enabling the upper end of the temperature control probe 4 to extend out of the burner 3 at different heights or to retract completely into the burner 3. This allows for flexible adjustment of the installation height of the temperature control probe 4 to adapt to different usage environments.

[0044] For example, the temperature control probe 4 has a first position, a second position and a third position. In the first position, the upper end of the temperature control probe 4 can extend out of the burner 3 by a predetermined distance. The drive mechanism 7 can drive the temperature control probe 4 to move up from the first position to the second position, or to lower the temperature control probe 4 from the first position to the third position. In the third position, the temperature control probe 4 is completely retracted into the burner 3.

[0045] Currently, gas stoves equipped with temperature control probe 4 are generally only suitable for flat-bottomed pans in order to ensure relatively high thermal efficiency. When using round-bottomed pans, a corresponding auxiliary pan rack is required to raise the pan and prevent the bottom of the pan from interfering with the copper core of the burner 3.

[0046] In actual use, the temperature control probe 4 is initially in the first position. For flat-bottomed cookware without an auxiliary pot rack, the temperature control probe 4 in the first position can be in contact with the bottom of the pot. For round-bottomed cookware placed on an auxiliary pot rack, the temperature control probe 4 in the first position can also be in contact with the bottom of the pot. For flat-bottomed cookware placed on an auxiliary pot rack, the temperature control probe 4 can be raised to the highest third position by the drive mechanism 7 so that the temperature control probe 4 is in contact with the bottom of the pot.

[0047] If the cookware used is a non-metallic pot such as a clay pot, when the burner 3 is working at the high heat setting, the drive mechanism 7 can lower the temperature control probe 4 to the third position, so that the temperature control probe 4 is completely retracted into the burner 3, in order to prevent the temperature control probe 4 from triggering the protection function due to detecting that the bottom temperature of the pot is too high, causing the burner 3 to shut off midway; when the pot is heated to boiling and the burner 3 is adjusted to the medium or low heat setting, the drive mechanism 7 can raise the temperature control probe 4 back to the first position (when there is no auxiliary pot support), so that the temperature control probe 4 is against the bottom of the pot to monitor the bottom temperature of the pot.

[0048] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the gas stove has a nozzle seat 6 inside, which is positioned opposite the burner 3 on the gas stove panel 1. Multiple support legs are spaced apart at the bottom of the nozzle seat 6, which is then fixed to the bottom shell 5 of the gas stove via these legs. A drive mechanism 7 is installed below the nozzle seat 6 and fixed to the bottom shell 5 of the gas stove. A through hole is provided at the position opposite to the center hole of the burner 3 on the nozzle seat 6, through which a temperature control probe 4 extends to the bottom of the nozzle seat 6 to connect with the drive end of the drive mechanism 7. By installing the drive mechanism 7 below the nozzle seat 6, space is effectively saved, facilitating its installation inside the gas stove.

[0049] In this embodiment, preferably, as follows: Figure 3 As shown, a guide seat 62 is fastened to the nozzle seat 6. The guide seat 62 includes a first guide portion and a second guide portion, which can be interlocked and form a guide through hole between them. When the guide seat 62 is installed on the nozzle seat 6, the guide through hole is coaxial with the through hole on the nozzle seat 6, and the guide through hole is adapted to the temperature control probe 4, allowing the temperature control probe 4 to pass through the guide through hole with a clearance fit. This allows the temperature control probe 4 to move up and down relative to the guide seat 62, and the guide seat 62 guides the movement of the temperature control probe 4. Furthermore, by providing the interlocking first and second guide portions, the guide seat 62 can be installed with the temperature control probe 4 first, and then the guide seat 62 can be installed on the nozzle seat 6, making installation more convenient.

[0050] In this embodiment, preferably, as follows: Figure 4As shown, the temperature control probe 4 is mounted on the drive end of the drive mechanism 7 via a connecting rod 71. Specifically, one end of the connecting rod 71 is connected to the drive end of the drive mechanism 7, and the other end of the connecting rod 71 is provided with a connecting seat. The connecting seat includes a first connecting part 72 and a second connecting part 73. The first connecting part 72 is mounted on the connecting seat, and the second connecting part 73 can be engaged with the first connecting part 72. A mounting hole is formed between the engaged first connecting part 72 and the second connecting part 73, and the lower end of the temperature control probe 4 can be inserted and clamped in the mounting hole.

[0051] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, the gas stove also includes a knob 2 and a control board 8. The control board 8 is located inside the gas stove, while the knob 2 is located outside the gas stove and installed on the panel 1 of the gas stove. The knob 2 is an encoder knob 2. Both the knob 2 and the drive mechanism 7 are communicatively connected to the control board 8. The knob 2 can communicate with the drive mechanism 7 through the control board 8, enabling the control board 8 to receive signals from the knob 2 and send signals to the drive mechanism 7 according to the rotation direction of the knob 2, so as to drive the temperature control probe 4 to rise and fall through the drive mechanism 7. For example, when the knob 2 is rotated clockwise, the drive mechanism 7 drives the temperature control probe 4 to rise, and when the knob 2 is rotated counterclockwise, the drive mechanism 7 drives the temperature control probe 4 to fall.

[0052] In this embodiment, preferably, the knob 2 is also used to control the ignition, ignition, and flame adjustment of the gas stove.

[0053] Specifically, the control panel 8 is configured to have a first control mode and a second control mode. The gas stove has an ignition mechanism, which is also communicatively connected to the control panel 8. In the first control mode, the knob 2 is communicatively connected to the ignition mechanism via the control panel 8. At this time, the control panel 8 can receive signals from the knob 2 and send signals to the ignition mechanism to control the ignition mechanism to complete the ignition, shut-off, and flame adjustment of the gas stove. The control panel 8 can switch from the first control mode to the second control mode. In the second control mode, the knob 2 is switched to be communicatively connected to the drive mechanism 7 of the temperature control probe 4 via the control panel 8. At this time, the control panel 8 can receive signals from the knob 2 and send signals to the drive mechanism 7 to adjust the temperature control probe 4 by raising and lowering it.

[0054] In this embodiment, preferably, the control panel 8 is configured such that when the gas stove is in the off state, the control panel 8 is in the first control mode, and when the knob 2 is pressed and rotated, the control panel 8 controls the ignition mechanism of the gas stove to ignite the gas stove.

[0055] Specifically, the ignition mechanism mainly includes an electrode needle 61 and an electrically controlled valve. The electrically controlled valve is used to control the flow of gas. The electrode needle 61 is mounted on the nozzle seat 6. The control board 8 controls the ignition of the gas stove, mainly by controlling the opening of the electrically controlled valve to supply gas to the nozzle on the nozzle seat 6, and simultaneously controlling the electrode needle 61 to discharge, thereby achieving ignition. Preferably, the nozzle seat 6 is also equipped with a thermocouple 63, and the temperature detected by the thermocouple 63 can determine whether ignition is successful.

[0056] Meanwhile, the control board 8 is configured such that, in the first control mode, when the gas stove is successfully ignited, rotating the knob 2 allows the control board 8 to control the ignition mechanism to adjust the firepower, specifically by adjusting the opening of the electronic control valve to adjust the amount of gas participating in combustion; for example, rotating the knob 2 counterclockwise will gradually decrease the firepower, while rotating the knob 2 clockwise will gradually increase the firepower.

[0057] Meanwhile, the control board 8 is configured such that, in the first control mode, when the gas stove is in normal working condition after successful ignition, pressing down and holding the knob 2 for a predetermined time will cause the control board 8 to control the ignition mechanism to turn off the gas stove, specifically by controlling the electric control valve to shut off.

[0058] In this embodiment, preferably, a button board 9 is connected to the control board 8 for communication. The button board 9 is attached to the panel 1 of the gas stove. The button board 9 is provided with a touch-sensitive function switching key. The user can switch the control board 8 from the first control mode to the second control mode by touching the function switching key.

[0059] Specifically, the control board 8 is configured such that when the gas stove is in normal working condition with successful ignition, the user can touch the function switching key to send a signal to the control board 8, causing the control board 8 to switch from the first control mode to the second control mode. At this time, operating the knob 2 will allow the control board 8 to control the drive mechanism 7, thereby realizing the lifting and lowering adjustment of the temperature control probe 4.

[0060] Preferably, the control board 8 is configured such that when the control board 8 is in the second control mode, rotating the knob 2 will allow the control board 8 to control the drive mechanism 7 according to the rotation direction of the knob 2, thereby realizing the lifting and lowering adjustment of the temperature control probe 4; for example, when the knob 2 is rotated clockwise, the control board 8 controls the drive mechanism 7 to raise the temperature control probe 4, and when the knob 2 is rotated counterclockwise, the control board 8 controls the drive mechanism 7 to lower the temperature control probe 4.

[0061] More preferably, the control board 8 is configured such that when the burner 3 is turned off, the control board 8 controls the drive mechanism 7 to reset the temperature control probe 4 to the second position, so that if the height of the temperature control probe 4 needs to be adjusted in subsequent use, the temperature control probe 4 can be raised from the second position to the first position or lowered from the second position to the third position according to the actual situation.

[0062] In this embodiment, preferably, the control board 8 is configured such that, in the second control mode, if the control board 8 does not receive a signal from the knob 2 within a predetermined time, the control board 8 automatically switches from the second control mode to the first control mode.

[0063] Regarding the rotatable and pressable knob 2, in one embodiment of this application, preferably, as shown below... Figure 5 As shown, the knob 2 includes a housing 25, a fixed shaft 21, an encoder, and a circuit board 24. The fixed shaft 21 is vertically mounted on the panel 1 of the gas stove. The encoder includes an inner stator 22 and an outer rotor 23 that are coaxial and can rotate relative to each other. The inner stator 22 is slidably mounted on the fixed shaft 21. The housing 25 is mounted on the outer rotor 23. The circuit board 24 is installed inside the housing 25, and the position of the circuit board 24 relative to the fixed shaft 21 is electrically connected to an on / off switch. The encoder is communicatively connected to the circuit board 24, and the circuit board 24 is communicatively connected to the control board 8.

[0064] When the housing 25 is pressed down, the housing 25, encoder and circuit board 24 move down at the same time, and the fixed shaft 21 can contact the switch on the circuit board 24, so that the switch is activated and sends an electrical signal to the control board 8 through the circuit board 24; when the housing 25 is rotated, the housing 25 can drive the outer rotor 23 to rotate relative to the inner stator 22, and the encoder can convert the generated angular displacement into an electrical signal and send it to the control board 8 through the circuit board 24.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas stove, characterized in that, Includes temperature control probe, drive mechanism, knob and control board; The drive mechanism is located inside the gas stove, and the temperature control probe is coaxially inserted into the center hole of the burner of the gas stove. The lower end of the temperature control probe is connected to the drive end of the drive mechanism so that the temperature control probe can be driven to move up and down through the drive mechanism. The control panel is located inside the gas stove, and the knob is installed on the panel of the gas stove. The knob can communicate with the drive mechanism through the control panel to adjust the temperature control probe by raising and lowering it.

2. The gas stove according to claim 1, characterized in that, The gas stove is equipped with a nozzle seat, which is disposed opposite to the burner. The nozzle seat is supported on the bottom shell of the gas stove by a support leg. The drive mechanism is located below the nozzle seat and fixed to the bottom shell. The nozzle seat has a through hole for the temperature control probe to pass through.

3. The gas stove according to claim 2, characterized in that, A guide seat is fastened to the nozzle seat. The guide seat includes a first guide portion and a second guide portion that are interlocked with each other. A guide through hole is formed between the first guide portion and the guide portion. The temperature control probe passes through the guide through hole with a clearance fit.

4. The gas stove according to claim 1, characterized in that, The driving end of the driving mechanism is provided with a connecting rod, and the end of the connecting rod away from the driving mechanism is provided with a connecting seat. The connecting seat includes a first connecting part and a second connecting part. The first connecting part is connected to the connecting rod, and the second connecting part is fastened to the first connecting part. A mounting hole for clamping the temperature control probe is formed between the first connecting part and the second connecting part.

5. The gas stove according to claim 1, characterized in that, The drive mechanism can drive the temperature control probe to switch between a second position, a first position, and a third position from high to low. In the first and second positions, the upper end of the temperature control probe extends out of the burner; in the third position, the temperature control probe retracts into the burner.

6. The gas stove according to claim 1, characterized in that, The control panel is configured to have a switchable first control mode and a second control mode. In the first control mode, the knob is communicatively connected to the ignition mechanism of the gas stove through the control board, so as to ignite, turn off and adjust the flame of the gas stove through the knob; When the control panel is switched to the second control mode, the knob is communicatively connected to the drive mechanism through the control panel.

7. The gas stove according to claim 6, characterized in that, The control board is connected to a keypad, which is mounted on the panel of the gas stove. The keypad has touch-sensitive function switching keys. The control panel is configured such that when the gas stove is in the ignition state, touching the function switch key will allow the control panel to switch from the first control mode to the second control mode.

8. The gas stove according to claim 6, characterized in that, The control board is configured such that, in the second control mode, when the knob is rotated, the control board can adjust the raising and lowering of the temperature control probe according to the direction of rotation of the knob; The control panel is configured such that, in the second control mode, if the control panel does not receive a signal from the knob within a predetermined time, the control panel automatically switches back to the first control mode from the second control mode.

9. The gas stove according to claim 6, characterized in that, The control panel is configured as follows: When the gas stove is in the off state, the control panel is in the first control mode. Pressing and rotating the knob controls the ignition mechanism of the gas stove to ignite the gas stove. When the gas stove is in the ignition-completed working state and the control panel is in the first control mode, rotating the knob will control the firepower of the gas stove according to the rotation direction of the knob. When the gas stove is in the ignition-completed working state and the control panel is in the first control mode, pressing down and holding the knob for a predetermined time will cause the control panel to control the ignition mechanism to turn off the gas stove.

10. The gas stove according to claim 1, characterized in that, The knob is an encoder knob, which includes a housing, a fixed shaft, an encoder, and a circuit board; The fixed shaft is fixedly mounted on the panel of the gas stove. The encoder includes an inner stator and an outer rotor that can rotate relative to each other. The inner stator is slidably mounted on the fixed shaft. The outer shell is mounted on the outer rotor. The outer shell can drive the outer rotor to rotate relative to the inner stator. The circuit board is located inside the housing, and a switch is electrically connected to the position of the circuit board opposite to the fixed shaft. Pressing down on the housing can cause the fixed shaft to touch the switch.

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