Food thermometer and food temperature detection system

Abstract

The utility model relates to the technical field of thermometers, in particular to a food thermometer and a food temperature detection system. The food thermometer comprises a circuit board, a charging assembly, an energy storage element, an insulating part, a first metal shell and a first temperature detection unit used for detecting the temperature of food, the circuit board is electrically connected with the charging assembly and the energy storage element, and the circuit board, the charging assembly and the energy storage element are all arranged on one side of the insulating part; the first metal shell is electrically connected with the circuit board and is arranged on the other side of the insulating part; the first temperature detection unit is electrically connected with the circuit board so as to transmit a temperature signal to the circuit board and transmit the temperature signal to an external terminal in a wireless signal mode through the first metal shell. According to the invention, the interference of the charging signal on wireless signal transmission can be reduced, the stability of wireless signal transmission is improved, the attenuation of the wireless signal can be reduced, and the wireless signal transmission effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of thermometers, in particular to a food thermometer and a food temperature detection system. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for food. The temperature of food, such as steak, is closely related to its taste and nutrition. When grilling and cooking, in order to ensure that the food has a good taste, it is necessary to detect the temperature of the food in real time, and food thermometers came into being. During the cooking process, the user inserts the food thermometer into the food to be cooked. The food thermometer transmits the temperature signal to the user terminal via its antenna in the form of a wireless signal, so that the user can obtain the temperature inside the food in real time during the cooking process.

[0003] In the related art, a food thermometer generally includes a ceramic shell, a circuit board, an antenna, a temperature sensor and an energy storage element. The circuit board, the antenna, the temperature sensor and the energy storage element are all arranged in the ceramic shell. The antenna, the temperature sensor and the energy storage element are all electrically connected to the circuit board. An external power supply charges the energy storage element through the circuit board.

[0004] However, in the above solution, the wireless signal transmission of the antenna is easily interfered by the charging signal of the energy storage element, and the transmission is unstable. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a food thermometer and a food temperature detection system to solve the problem that the wireless signal transmission of the food thermometer in the prior art is easily interfered and the transmission is unstable.

[0006] The utility model discloses a food thermometer, comprising a circuit board, a charging assembly, an energy storage element, an insulating member, a first metal shell and a first temperature detection unit for detecting the temperature of food, wherein:

[0007] The circuit board is electrically connected to the charging assembly and the energy storage element, and the circuit board, the charging assembly and the energy storage element are all arranged on one side of the insulating member;

[0008] The first metal shell is electrically connected to the circuit board and is disposed on the other side of the insulating member;

[0009] The first temperature detection unit is electrically connected to the circuit board to transmit a temperature signal to the circuit board, and transmits the temperature signal to an external terminal via the first metal housing in the form of a wireless signal.

[0010] Optionally, a through hole is provided on the insulating member, and the food thermometer further comprises a first conductive member penetrating the through hole, one end of the first conductive member is electrically connected to the circuit board, and the other end thereof is electrically connected to the first metal shell.

[0011] Optionally, the charging assembly includes a second conductive member and a second metal shell electrically connected to two electrode ends of the circuit board respectively, and the energy storage element, the circuit board and the first temperature detection unit are all arranged in the second metal shell.

[0012] Optionally, the insulating member includes a first mounting portion, an isolating portion and a second mounting portion, the isolating portion is arranged between the first mounting portion and the second mounting portion, the first metal shell is sleeved on the first mounting portion, and the second metal shell and the second conductive member are arranged at intervals and are both sleeved on the second mounting portion.

[0013] Optionally, the charging component also includes a third conductive member, a receiving groove is provided on the second mounting portion, the third conductive member is received in the receiving groove, one end of the third conductive member is electrically connected to the circuit board, and the other end is electrically connected to the second conductive member.

[0014] Optionally, the second mounting portion includes a first mounting protrusion and a second mounting protrusion, the second mounting protrusion is protruded on the end face of the first mounting protrusion and is coaxially arranged with the first mounting protrusion, the second conductive member is sleeved on the first mounting protrusion, the second metal shell is sleeved on the second mounting protrusion, and a gap is formed between the second conductive member and the second metal shell.

[0015] Optionally, the second mounting portion further includes a limiting protrusion protruding from an end surface of the first mounting protrusion, and the limiting protrusion abuts against the second metal shell to limit the depth of the second metal shell being sleeved on the second mounting protrusion.

[0016] Optionally, the charging component further includes at least one conductive pin disposed on the circuit board, and the circuit board is electrically connected to the second metal shell via the conductive pin.

[0017] Optionally, the at least one conductive ejector pin includes a first conductive ejector pin and a second conductive ejector pin, the first conductive ejector pin and the second conductive ejector pin are symmetrically arranged on the front and back sides of the circuit board, and the circuit board is electrically connected to the second metal shell through the first conductive ejector pin and / or the second conductive ejector pin.

[0018] The utility model also discloses a food temperature detection system, including a relay device and the food thermometer as described above, wherein the relay device is communicatively connected to the first metal shell of the food thermometer and transmits the temperature signal transmitted by the first metal shell to an external terminal, and the relay device can be electrically connected to the charging component of the food thermometer.

[0019] Compared with the prior art, the beneficial effects of the food thermometer and food temperature detection system provided by the embodiments of the utility model are: by separating the first metal shell for realizing wireless signal transmission and the circuit board, charging assembly and energy storage element for realizing charging of the food thermometer on both sides of the insulating part, the transmission of wireless signals and the charging signal are separated, the interference of charging signals on wireless signal transmission is reduced, and the stability of wireless signal transmission is improved. At the same time, since the first metal shell is directly used as an antenna for transmitting wireless signals, compared with the solution in which the antenna is set in a ceramic shell, the present application can reduce the attenuation of wireless signals and the wireless signal transmission effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 It is a three-dimensional schematic diagram of a food thermometer provided by an embodiment of the utility model;

[0022] Figure 2 It is a three-dimensional schematic diagram of a food thermometer provided by an embodiment of the utility model (in a state where the first metal shell and the second metal shell are not installed);

[0023] Figure 3 It is a three-dimensional schematic diagram of the electrical connection state between the energy storage element and the circuit board provided by the embodiment of the utility model;

[0024] Figure 4 It is a cross-sectional structural schematic diagram of a food thermometer provided by an embodiment of the utility model;

[0025] Figure 5 yes Figure 4 Middle A is a partial enlarged schematic diagram;

[0026] Figure 6 It is a three-dimensional schematic diagram of an insulating member provided by an embodiment of the utility model;

[0027] Figure 7 It is a three-dimensional schematic diagram of a food temperature detection system (a food thermometer and a relay device are electrically connected) provided by an embodiment of the utility model;

[0028] Figure 8It is a three-dimensional schematic diagram of a food temperature detection system (a food thermometer is electrically disconnected from a relay device) provided by an embodiment of the utility model.

[0029] The reference numerals in the figures are:

[0030] 100. Food thermometer;

[0031] 10. Circuit board; 20. Charging assembly; 21. Second conductive member; 22. Second metal shell; 23. Third conductive member; 24. First conductive ejector pin; 25. Second conductive ejector pin; 30. Energy storage element; 31. Battery; 311. Heat-insulating adhesive; 40. Insulating member; 410. Through hole; 420. Accommodating groove; 41. First mounting portion; 42. Isolating portion; 43. Second mounting portion; 431. First mounting protrusion; 432. Second mounting protrusion; 433. Position-limiting protrusion; 50. First metal shell; 60. First temperature detection unit; 70. Second temperature detection unit; 80. First conductive member;

[0032] 200. Relay device; 210. Electrical connection terminal. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0034] The present utility model embodiment provides a food thermometer 100, such as Figures 1 to 4 As shown, the food thermometer 100 includes a circuit board 10, a charging assembly 20, an energy storage element 30, an insulating member 40, a first metal shell 50 and a first temperature detection unit 60 for detecting the temperature of food.

[0035] The circuit board 10 is electrically connected to the charging assembly 20 and the energy storage element 30 , and the circuit board 10 , the charging assembly 20 and the energy storage element 30 are all arranged on one side of the insulating member 40 .

[0036] The first metal housing 50 is electrically connected to the circuit board 10 and is disposed on the other side of the insulating member 40 .

[0037] The first temperature detection unit 60 is electrically connected to the circuit board 10 to transmit the temperature signal to the circuit board 10 and transmit the temperature signal to an external terminal via the first metal housing 50 in the form of a wireless signal.

[0038] The present application separates the transmission of wireless signals from the charging signals by separately arranging the first metal shell 50 for realizing wireless signal transmission and the circuit board 10, the charging assembly 20 and the energy storage element 30 for realizing charging of the food thermometer 100 on both sides of the insulating part 40, thereby reducing the interference of the charging signal on the transmission of wireless signals and improving the stability of the transmission of wireless signals. At the same time, since the first metal shell 50 is directly used as an antenna for transmitting wireless signals, compared with the solution in which the antenna is arranged in a ceramic shell, the present application can reduce the attenuation of wireless signals and achieve better wireless signal transmission effect.

[0039] Among them, reference Figures 1 to 3 , the energy storage element 30 can supply power to the circuit board 10, and the external power supply can be electrically connected to the charging component 20, and the energy storage element 30 is charged through the charging component 20 and the circuit board 10. The energy storage element 30 can specifically be a battery, a supercapacitor, or other component that can store electrical energy. In this embodiment, the energy storage element 30 preferably uses a battery 31, and the periphery of the battery 31 can be coated with a heat-insulating glue 311 to play a role in heat insulation and extend the service life of the battery 31.

[0040] The insulating member 40 may be made of one of ceramic, silica gel and ceramic fiber. In this embodiment, the insulating member 40 is preferably made of ceramic, specifically black ceramic, which is resistant to high temperature, heat and corrosion.

[0041] The first temperature detection unit 60 can detect the temperature of the food. The first temperature detection unit 60 can be specifically a temperature sensor. The temperature sensor is arranged on the circuit board 10 and is electrically connected to the circuit board 10. The specific position of the temperature sensor on the circuit board 10 can be set as needed. The temperature sensor detects and obtains the temperature of the food and transmits the temperature signal to the circuit board 10. The relevant circuit on the circuit board 10 processes the temperature signal. The processed signal is transmitted through the first metal shell 50 as a wireless signal and transmitted to the external terminal. The external terminal can be a mobile phone, a tablet, a notebook, etc. The user obtains the temperature of the food in real time through the terminal.

[0042] Furthermore, the food thermometer 100 may also include a second temperature detection unit 70 for detecting the ambient temperature. The second temperature detection unit 70 is electrically connected to the circuit board 10, and can transmit the temperature signal to the circuit board 10, and transmit it to the external terminal through the first metal shell 50 as a wireless signal. The second temperature detection unit 70 can detect the temperature of the environment, such as the temperature in cooking utensils such as ovens and baking ovens. The second temperature detection unit 70 can also use a temperature sensor, and can be specifically arranged in the first metal shell 50, and electrically connected to the circuit board 10 through a connecting line. The relevant circuit on the circuit board 10 processes the temperature signal, and the processed signal is transmitted through the first metal shell 50 as a wireless signal.

[0043] refer to Figure 2 , Figure 4 and Figure 6 In this embodiment, a through hole 410 is provided on the insulating member 40, and the food thermometer 100 further includes a first conductive member 80 provided through the through hole 410, one end of the first conductive member 80 is electrically connected to the circuit board 10, and the other end is electrically connected to the first metal shell 50.

[0044] By providing a through hole 410 on the insulating member 40 for the first conductive member 80 to pass through, the first metal shell 50 and the circuit board 10 separated on both sides of the insulating member 40 can be electrically connected, and the structure is compact.

[0045] The shape of the first conductive member 80 may be a strip, a sheet, or an irregular shape, etc. In this embodiment, the first conductive member 80 preferably adopts a sheet-shaped conductive spring, which is provided through the through hole 410, one end of which is electrically connected to the circuit board 10, and the other end of which is elastically abutted and electrically connected to the first metal shell 50. The conductive spring has a certain elasticity and flexibility, which can allow a slight change in the distance between the components, so that the first metal shell 50 and the circuit board 10 are always electrically connected, thereby improving the stability of the electrical connection.

[0046] refer to Figure 4 and Figure 5 In this embodiment, the charging component 20 includes a second conductive member 21 and a second metal shell 22 which are electrically connected to two electrode ends of the circuit board 10 respectively, and the energy storage element 30, the circuit board 10 and the first temperature detection unit 60 are all arranged in the second metal shell 22.

[0047] The external power supply can be electrically connected to the circuit board 10 through the second conductive member 21 and the second metal shell 22, thereby charging the energy storage element 30. Among them, one of the second conductive member 21 and the second metal shell 22 serves as a positive charging electrode, and the other serves as a negative charging electrode. Preferably, the second conductive member 21 serves as a negative charging electrode and is electrically connected to the negative electrode end of the circuit board 10, and the second metal shell 22 serves as a positive charging electrode and is electrically connected to the positive electrode end of the circuit board 10.

[0048] The second metal shell 22 can serve as a protective shell for the energy storage element 30, the circuit board 10 and the first temperature detection unit 60. At the same time, the second metal shell 22 can also serve as a conductive end connecting the circuit board 10 with the external power supply. The second metal shell 22 has a large area, which can improve the reliability and stability of the electrical connection between the first metal shell 50 and the external power supply and the internal circuit board 10 to a certain extent, and is conducive to heat dissipation during charging, thereby extending the service life of the food thermometer 100.

[0049] When using the food thermometer 100, the user inserts the food thermometer 100 into the food, such as a steak, through the second metal shell 22, so as to detect and obtain the temperature of the food through the first temperature detection unit 60. In a specific implementation, the end of the second metal shell 22 away from the insulating member 40 can be set as a pointed end to facilitate insertion into the food.

[0050] In other embodiments, as an electrical connection end for electrically connecting the circuit board 10 to the external power supply, the charging component 20 may also include two conductive terminals electrically connected to the circuit board 10. The two conductive terminals are arranged on one side of the insulating component 40 through a ceramic shell and separated from the first metal shell 50. The external power supply is electrically connected to the circuit board 10 through the two conductive terminals to charge the energy storage element 30.

[0051] refer to Figures 4 to 6 In this embodiment, the insulating member 40 includes a first mounting portion 41, an isolating portion 42 and a second mounting portion 43, the isolating portion 42 is arranged between the first mounting portion 41 and the second mounting portion 43, the first metal shell 50 is sleeved on the first mounting portion 41, and the second metal shell 22 and the second conductive member 21 are arranged at intervals and are both sleeved on the second mounting portion 43.

[0052] By separating and arranging the first mounting portion 41 and the second mounting portion 43 on both sides of the isolation portion 42, the first metal housing 50 for wireless signal transmission and the second metal housing 22 and the second conductive member 21 for charging are respectively installed and sleeved, the wireless signal transmission and the charging of the energy storage element 30 are separated, the interference of the charging signal on the wireless signal transmission is reduced, and the stability of the wireless signal transmission is improved. Through the above structure, the first metal housing 50, the second metal housing 22 and the second conductive member 21 are easy to assemble.

[0053] The second conductive member 21 may be a conductive metal ring, which is sleeved on the second mounting portion 43 .

[0054] Furthermore, the charging assembly 20 also includes a third conductive member 23 . A receiving groove 420 is provided on the second mounting portion 43 . The third conductive member 23 is received in the receiving groove 420 , and one end of the third conductive member 23 is electrically connected to the circuit board 10 , and the other end of the third conductive member 23 is electrically connected to the second conductive member 21 .

[0055] The second conductive member 21 and the second metal shell 22 are both sleeved on the second mounting portion 43. By accommodating the third conductive member 23 in the accommodating groove 420, the second conductive member 21 can be electrically connected to the circuit board 10 without causing a short circuit between the second conductive member 21 and the second metal shell 22. The design is ingenious and the structure is compact.

[0056] Specifically, the shape of the third conductive member 23 can be strip-shaped, sheet-shaped, etc. In this embodiment, the third conductive member 23 is also preferably a sheet-shaped conductive spring, which elastically abuts against the second conductive member 21. The conductive spring is accommodated in the accommodating groove 420. The conductive spring has a certain elasticity and flexibility, which can allow a slight distance change between the components, so that the second conductive member 21 and the circuit board 10 are always electrically connected, improving the stability of the electrical connection. The third conductive member 23 can also be electrically connected to the second conductive member 21 by spot welding, and the electrical connection is more stable.

[0057] refer to Figures 1 to 4 The charging assembly 20 further includes at least one conductive pin disposed on the circuit board 10 , and the circuit board 10 is electrically connected to the second metal shell 22 via the conductive pin.

[0058] The conductive ejector pin has a certain elasticity and can be elastically pressed against the second metal shell 22 for electrical connection, allowing a slight change in the distance between the circuit board 10 and the second metal shell 22 so that the circuit board 10 and the second metal shell 22 can always maintain electrical connection, thereby improving the stability of the electrical connection.

[0059] The number of the conductive ejector pins may be one, two, or more than two, and the user may set the number according to the needs. Preferably, a first conductive ejector pin 24 and a second conductive ejector pin 25 are provided on the circuit board 10. The first conductive ejector pin 24 and the second conductive ejector pin 25 are symmetrically arranged on the front and back sides of the circuit board 10, and the circuit board 10 is electrically connected to the second metal housing 22 by the first conductive ejector pin 24 and / or the second conductive ejector pin 25.

[0060] In the process of assembling the circuit board 10 in the second metal shell 22, it is difficult to ensure that the circuit board 10 can be centered in the second metal shell 22. Therefore, by symmetrically arranging the first conductive ejector pin 24 and the second conductive ejector pin 25 on the front and back sides of the circuit board 10, the circuit board 10 can be electrically connected to the second metal shell 22 through the first conductive ejector pin 24 or the second conductive ejector pin 25, or through the first conductive ejector pin 24 and the second conductive ejector pin 25, ensuring that the circuit board 10 can always be electrically connected to the second metal shell 22 through the conductive ejector pins, thereby improving the stability and reliability of the electrical connection between the circuit board 10 and the second metal shell 22.

[0061] refer to Figure 2 , Figure 4 , Figure 5 and Figure 6In this embodiment, the second mounting portion 43 includes a first mounting protrusion 431 and a second mounting protrusion 432. The second mounting protrusion 432 is protruded on the end surface of the first mounting protrusion 431 and is coaxially arranged with the first mounting protrusion 431. The second conductive member 21 is sleeved on the first mounting protrusion 431, and the second metal shell 22 is sleeved on the second mounting protrusion 432. A gap is formed between the second conductive member 21 and the second metal shell 22.

[0062] By providing the first mounting protrusion 431 and the second mounting protrusion 432 , the second metal shell 22 and the second conductive member 21 are respectively sleeved and mounted, so as to separate the second metal shell 22 and the second conductive member 21 and prevent the two from contacting and short-circuiting.

[0063] Furthermore, the second mounting portion 43 further includes a limiting protrusion 433 protruding from the end surface of the first mounting protrusion 431 , and the limiting protrusion 433 abuts against the second metal shell 22 to limit the depth of the second metal shell 22 being sleeved on the second mounting protrusion 432 .

[0064] By arranging the limiting protrusion 433 to abut against the second metal shell 22 , the second metal shell 22 is sleeved on the second installation protrusion 432 to limit the position, so that the second metal shell 22 can be installed in place.

[0065] In a specific implementation, the first mounting protrusion 431, the limiting protrusion 433, and the second mounting protrusion 432 are three coaxially arranged cylinders, and the diameters of the first mounting protrusion 431, the limiting protrusion 433, and the second mounting protrusion 432 are successively reduced. The receiving groove 420 for receiving the third conductive member 23 extends from the first mounting protrusion 431 through the limiting protrusion 433 to the second mounting protrusion 432. In other embodiments, the first mounting protrusion 431, the limiting protrusion 433, and the second mounting protrusion 432 can also be columnar structures with other cross-sectional shapes, such as square, rectangular, etc.

[0066] The first mounting portion 41 may also be a cylinder, and the first metal shell 50 is sleeved and assembled on the cylinder.

[0067] refer to Figure 1 , Figure 7 and Figure 8 The present application also provides a food temperature detection system. The food temperature detection system includes a relay device 200 and the food thermometer 100 as described above. The relay device 200 is communicatively connected with the first metal shell 50 of the food thermometer 100, and transmits the temperature signal transmitted by the first metal shell 50 to the external terminal. The relay device 200 can be electrically connected to the charging component 20 of the food thermometer 100.

[0068] The food thermometer 100 in the food temperature detection system of the present application separates the transmission of wireless signals from the charging signals by separately arranging the first metal shell 50 for realizing wireless signal transmission and the circuit board 10, the charging component 20 and the energy storage element 30 for realizing charging of the food thermometer 100 on both sides of the insulating part 40, thereby reducing the interference of the charging signal on the wireless signal transmission and improving the stability of the wireless signal transmission. At the same time, since the first metal shell 50 is directly used as an antenna for transmitting wireless signals, compared with the solution in which the antenna is arranged in a ceramic shell, the present application can reduce the attenuation of the wireless signal and achieve a better wireless signal transmission effect.

[0069] In the food temperature detection system, by setting up a relay device 200 as a transfer station for signal transmission between the food thermometer 100 and an external terminal such as a mobile phone, the long-distance transmission of the signal of the food thermometer 100 can be achieved. At the same time, the relay device 200 can be electrically connected to the charging component of the food thermometer 100 to charge its energy storage element through the charging component of the food thermometer 100.

[0070] When implementing it, refer to Figure 7 and Figure 8 The relay device 200 may be provided with an electrical connection terminal 210, which is electrically connected to the charging component 20 of the food thermometer 100 to charge its energy storage element 30. When the food thermometer 100 needs to be charged, the charging component 20 of the food thermometer 100 may be electrically connected to the electrical connection terminal 210 of the relay device 200; when the food thermometer 100 needs to be used to detect the temperature of food or the food thermometer 100 is fully charged, the charging component 20 of the food thermometer 100 may be electrically disconnected from the electrical connection terminal 210 of the relay device 200.

[0071] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A food thermometer, characterized in that: It includes a circuit board, a charging assembly, an energy storage element, an insulating member, a first metal shell and a first temperature detection unit for detecting the temperature of food, wherein: The circuit board is electrically connected to the charging assembly and the energy storage element, and the circuit board, the charging assembly and the energy storage element are all arranged on one side of the insulating member; The first metal shell is electrically connected to the circuit board and is disposed on the other side of the insulating member; The first temperature detection unit is electrically connected to the circuit board to transmit a temperature signal to the circuit board, and transmits the temperature signal to an external terminal via the first metal housing in the form of a wireless signal.

2. The food thermometer according to claim 1, characterized in that The insulating member is provided with a through hole, and the food thermometer further comprises a first conductive member penetrating the through hole, wherein one end of the first conductive member is electrically connected to the circuit board, and the other end of the first conductive member is electrically connected to the first metal shell.

3. The food thermometer according to claim 1 or 2, characterized in that: The charging assembly includes a second conductive member and a second metal shell which are electrically connected to two electrode ends of the circuit board respectively. The energy storage element, the circuit board and the first temperature detection unit are all arranged in the second metal shell.

4. The food thermometer according to claim 3, characterized in that: The insulating member includes a first mounting portion, an isolating portion and a second mounting portion, the isolating portion is arranged between the first mounting portion and the second mounting portion, the first metal shell is sleeved on the first mounting portion, and the second metal shell and the second conductive member are arranged at intervals and are both sleeved on the second mounting portion.

5. The food thermometer according to claim 4, characterized in that The charging assembly also includes a third conductive member. A receiving groove is provided on the second mounting portion. The third conductive member is received in the receiving groove, and one end of the third conductive member is electrically connected to the circuit board, and the other end of the third conductive member is electrically connected to the second conductive member.

6. The food thermometer according to claim 5, characterized in that The second mounting portion includes a first mounting protrusion and a second mounting protrusion, the second mounting protrusion is protruding on the end surface of the first mounting protrusion and is coaxially arranged with the first mounting protrusion, the second conductive member is sleeved on the first mounting protrusion, the second metal shell is sleeved on the second mounting protrusion, and a gap is formed between the second conductive member and the second metal shell.

7. The food thermometer according to claim 6, characterized in that The second mounting portion further includes a limiting protrusion protruding from an end surface of the first mounting protrusion, and the limiting protrusion abuts against the second metal shell to limit the depth of the second metal shell being sleeved on the second mounting protrusion.

8. The food thermometer according to claim 3, characterized in that The charging assembly also includes at least one conductive pin disposed on the circuit board, and the circuit board is electrically connected to the second metal shell through the conductive pin.

9. The food thermometer according to claim 8, characterized in that The at least one conductive ejector pin includes a first conductive ejector pin and a second conductive ejector pin, wherein the first conductive ejector pin and the second conductive ejector pin are symmetrically arranged on the front and back sides of the circuit board, and the circuit board is electrically connected to the second metal shell through the first conductive ejector pin and / or the second conductive ejector pin.

10. A food temperature detection system, characterized in that: It comprises a relay device and a food thermometer as described in any one of claims 1 to 9, wherein the relay device is communicatively connected to a first metal shell of the food thermometer and transmits a temperature signal transmitted by the first metal shell to an external terminal, and the relay device can be electrically connected to a charging component of the food thermometer.

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