A bluetooth temperature probe

Abstract

The application relates to a Bluetooth temperature probe which comprises a needle tube, a handle, a first temperature sensor and a PCB board, the first temperature sensor and the PCB board are arranged in the needle tube, the handle is fixedly connected with the tail end of the needle tube, the application further comprises a ceramic antenna, the ceramic antenna is arranged in the needle tube and the handle, the front end of the ceramic antenna is inserted into the needle tube and is electrically connected with the PCB board, the rear end of the ceramic antenna is inserted into the handle to realize the antenna function by receiving and transmitting signals, the application adopts the ceramic antenna to replace the original FPC antenna, the ceramic antenna has the characteristics of high-temperature resistance, can work for a long time in a high-temperature environment and can still guarantee the stability of work, and has the advantages of high gain and high sensitivity, the front end of the ceramic antenna is inserted into the needle tube and is electrically connected with the PCB board, the rear end of the ceramic antenna is inserted into the handle, and the handle is generally made of a material such as ceramic which has poor shielding effect, so that the receiving and transmitting signals of the ceramic antenna are not affected and the antenna function is realized.

Description

Technical Field

[0001] This application relates to the field of temperature measuring instrument technology, and in particular to a Bluetooth temperature probe. Background Technology

[0002] As people's living standards improve, their requirements for food are also increasing. Bluetooth temperature probes are being used more and more widely. Bluetooth temperature probes can be inserted into food to measure temperature directly, making it convenient for users to view the internal temperature data of food in real time and assisting in intelligent cooking.

[0003] Existing Bluetooth temperature probes generally include a needle tube, a handle, a temperature sensor, a PCB board, a Bluetooth module, an antenna, and a power supply module. The needle tube is made of metal, which has good thermal conductivity. The temperature sensor detects the temperature of the needle tube, and the Bluetooth module and antenna transmit the temperature signal to an external receiving terminal. Because Bluetooth temperature probes are frequently exposed to high temperatures, and the antenna is generally in the form of an FPC (Flexible Printed Circuit), as detailed in patent application CN212030751U entitled "A Four-Wire Bluetooth Barbecue Thermometer," FPC antennas are prone to performance degradation under prolonged high temperatures, and their lifespan is also relatively short, requiring improvement. Summary of the Invention

[0004] To address the technical problem that existing Bluetooth temperature probes using FPC antennas suffer from unstable performance and limited lifespan under prolonged high temperatures, this invention provides a Bluetooth temperature probe.

[0005] The Bluetooth temperature probe provided in this application adopts the following technical solution: A Bluetooth temperature probe includes a needle tube, a handle, a first temperature sensor, and a PCB board. The first temperature sensor and the PCB board are both disposed inside the needle tube. The handle is fixedly connected to the tail end of the needle tube. It also includes a ceramic antenna, which is disposed inside the needle tube and the handle. The front end of the ceramic antenna extends into the needle tube and is electrically connected to the PCB board, and the rear end extends into the handle to realize the antenna function for transmitting and receiving signals.

[0006] By adopting the above technical solution, this application uses a ceramic antenna to replace the original FPC antenna. Ceramic antennas are characterized by high temperature resistance, ensuring operational stability even after prolonged operation in high-temperature environments. They also possess advantages such as high gain and high sensitivity. The front end of the ceramic antenna extends into the needle tube for electrical connection to the PCB board, while the rear end extends into the handle. The handle is generally made of materials with poor shielding properties, such as ceramic, to avoid significantly affecting the antenna's signal transmission and reception functions.

[0007] Preferably, the Bluetooth temperature probe further includes a shielding tube, which is disposed inside the needle tube and the handle, and sleeved on the outside of the ceramic antenna. The front end extends into the needle tube, and the rear end extends into the handle. The rear end of the ceramic antenna extends beyond the shielding tube to realize the antenna function for transmitting and receiving signals.

[0008] By adopting the above technical solution, the shielding tube plays the role of ground in the antenna system. By adjusting the length of the shielding tube, the length of the active part of the antenna can be changed, thereby changing the antenna performance and achieving a higher level of efficiency and better consistency.

[0009] Preferably, the cross-sectional shape of the shielding tube is circular, elliptical, or polygonal, and the shielding tube is a stainless steel shielding tube, a copper shielding tube, or an aluminum shielding tube.

[0010] By adopting the above technical solution, this application does not impose too many restrictions on the shape of the shielding tube, as long as it achieves the shielding effect; it also does not impose too many restrictions on the material of the shielding tube, as long as it achieves the shielding effect.

[0011] Preferably, the ceramic antenna includes a ceramic substrate and an antenna metal layer disposed on the ceramic substrate.

[0012] Preferably, the Bluetooth temperature probe further includes an anti-dislodgement buckle, and the inner wall of the rear end of the needle tube is provided with a groove. The anti-dislodgement buckle is inserted into the groove so that the anti-dislodgement buckle is fixedly connected to the needle tube. The anti-dislodgement buckle is sleeved on the shielding tube and fixedly connected to the shielding tube.

[0013] By adopting the above technical solution, the shielding tube also serves as a structural component connecting the needle tube and the handle. The anti-disengagement buckle and the shielding tube are first fixedly connected, and then the anti-disengagement buckle is inserted into the groove of the needle tube, that is, the needle tube is fixed to the front end of the shielding tube.

[0014] Preferably, the anti-detachment buckle and the shielding tube are fixedly connected by adhesive.

[0015] Preferably, the anti-detachment buckle includes an annular base and a plurality of elastic cantilever arms disposed on the annular base. The front end of the elastic cantilever arm is provided with a buckle, which is adapted to the groove on the needle tube.

[0016] By adopting the above technical solution, when the anti-detachment buckle is installed on the syringe, the elastic cantilever will be squeezed inward and elastically deformed. When the buckle reaches the groove, the elastic cantilever will elastically recover its deformation outward, so that the buckle is engaged with the groove, realizing the fixed connection between the syringe and the shielding tube. The pull force is large and it will not easily come off.

[0017] Preferably, the shielding tube has an external thread in the middle, and the inner wall of the handle has a corresponding internal thread, and the handle is screwed and fixed to the shielding tube.

[0018] By adopting the above technical solution, a stable connection between the handle and the shielding tube can be achieved.

[0019] Preferably, the handle has a charging metal head at the tail, the ceramic antenna has a charging circuit, the charging circuit and the antenna metal layer are respectively disposed on two opposite surfaces of the ceramic substrate, the charging metal head is electrically connected to the charging circuit on the ceramic antenna, and the charging circuit on the ceramic antenna is electrically connected to the PCB board; the PCB board has a spring contact, the needle is electrically connected to the PCB board through the spring contact, and the charging metal head and the needle are the positive and negative terminals of the charging circuit.

[0020] By adopting the above technical solution, the power supply module can be charged. Moreover, the charging circuit and the antenna metal layer are respectively set on two opposite surfaces of the ceramic substrate, making full use of the insulation performance of the ceramic substrate so that the charging circuit and the antenna metal layer do not affect each other. Therefore, the performance of the antenna will not be affected during charging.

[0021] Preferably, the Bluetooth temperature probe further includes a second temperature sensor for detecting ambient temperature. The second temperature sensor is electrically connected to the PCB board, and the inner end of the charging metal head is provided with a receiving hole, in which the second temperature sensor is disposed.

[0022] By adopting the above technical solution, the charging metal head has good heat conduction and heat dissipation effects due to its metal material, and can basically keep the temperature consistent with the ambient temperature, making the ambient temperature measurement more accurate.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application uses a ceramic antenna to replace the original FPC antenna. The ceramic antenna has the characteristics of high temperature resistance, and can still ensure the stability of operation even when working for a long time in a high temperature environment. It also has the advantages of high gain and high sensitivity.

[0025] 2. The front end of the ceramic antenna extends into the needle tube to make an electrical connection with the PCB board, and the rear end extends into the handle. The handle is generally made of materials with poor shielding effect, such as ceramic, so as not to have a significant impact on the signal transmission and reception of the ceramic antenna and enable the antenna function.

[0026] 3. The shielding tube acts as ground in the antenna system. By adjusting the length of the shielding tube, the length of the active part of the antenna can be changed, thereby changing the antenna performance and achieving a higher level of efficiency and better consistency.

[0027] 4. The shielding tube also serves as a structural component connecting the needle tube and the handle, achieving a stable connection between the handle and the shielding tube. Attached Figure Description

[0028] Figure 1A perspective view of the Bluetooth temperature probe described in an embodiment of this application is illustrated;

[0029] Figure 2 A half-sectional schematic diagram of the Bluetooth temperature probe described in an embodiment of this application is illustrated;

[0030] Figure 3 It is illustrated Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 A half-sectional view of the Bluetooth temperature probe described in an embodiment of this application is shown from another angle;

[0032] Figure 5 An exploded view of the Bluetooth temperature probe described in an embodiment of this application is illustrated.

[0033] Figure 6 An exploded view of the Bluetooth temperature probe described in an embodiment of this application is shown below.

[0034] Figure 7 A further exploded structural diagram of the Bluetooth temperature probe described in the embodiments of this application is illustrated;

[0035] Figure 8 This illustration shows a further exploded structural diagram of the Bluetooth temperature probe described in an embodiment of this application from another angle;

[0036] Figure 9 A perspective view of the ceramic antenna described in an embodiment of this application is illustrated;

[0037] Figure 10 A perspective view of the ceramic antenna described in an embodiment of this application is shown from another angle;

[0038] Figure 11 A perspective view of the anti-detachment buckle described in the embodiments of this application is illustrated;

[0039] Figure 12 A perspective view of the charging metal head described in an embodiment of this application is shown.

[0040] Explanation of reference numerals in the attached drawings: 1. Needle tube; 11. Groove; 2. Handle; 21. Internal thread; 3. First temperature sensor; 4. PCB board; 41. Spring; 5. Ceramic antenna; 51. Ceramic substrate; 52. Antenna metal layer; 53. Charging circuit; 6. Shielding tube; 61. External thread; 7. Anti-disengagement buckle; 71. Annular base; 72. Elastic cantilever; 73. Buckle; 8. Charging metal head; 81. Receiving hole; 9. Second temperature sensor; 10. Power supply module. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0042] Reference Figures 1 to 3 This application discloses a Bluetooth temperature probe, including a needle tube 1, a handle 2, a first temperature sensor 3, a PCB board 4, and a ceramic antenna 5. The first temperature sensor 3 and the PCB board 4 are both disposed within the needle tube 1. The handle 2 is fixedly connected to the tail end of the needle tube 1. The ceramic antenna 5 is disposed inside the needle tube 1 and the handle 2, with its front end extending into the needle tube 1 and electrically connected to the PCB board 4, and its rear end extending into the handle 2, to perform antenna functions for transmitting and receiving signals. The ceramic antenna 5 of this application includes a ceramic substrate 51 and an antenna metal layer 52 disposed on the ceramic substrate 51.

[0043] This application uses a ceramic antenna 5 to replace the original FPC antenna. The ceramic antenna 5 is characterized by high temperature resistance, ensuring stable operation even after prolonged use in high-temperature environments. It also boasts advantages such as high gain and high sensitivity. The front end of the ceramic antenna 5 extends into the needle tube 1 and is electrically connected to the PCB board 4, while the rear end extends into the handle 2. The handle 2 is generally made of materials with poor shielding properties, such as ceramic, to avoid significantly affecting the antenna function of the ceramic antenna 5 in transmitting and receiving signals.

[0044] The design and debugging of typical built-in antennas require consideration of the dielectric constant of the surrounding materials in the specific environment in which the antenna is used. Most of them require custom design, have poor versatility, and have a long development cycle.

[0045] Reference Figure 7 and Figure 8 The Bluetooth temperature probe also includes a shielding tube 6, which is disposed inside the needle tube 1 and the handle 2, and sleeved on the outside of the ceramic antenna 5. The front end of the shielding tube 6 extends into the needle tube 1, and the rear end extends into the handle 2. The rear end of the ceramic antenna 5 extends beyond the shielding tube 6, specifically the antenna metal layer 52, to achieve the antenna function of transmitting and receiving signals. The shielding tube 6 acts as ground in the antenna system. By adjusting the length of the shielding tube 6, the length of the functional part of the ceramic antenna 5 can be changed, thereby altering the antenna performance and achieving higher efficiency and better consistency. Different specifications and models of Bluetooth temperature probes can use the same ceramic antenna 5; only the length of the shielding tube 6 needs to be adjusted, resulting in good versatility and a shorter development cycle.

[0046] The cross-sectional shape of the shielding tube 6 can be circular, elliptical, or polygonal, and the shielding tube 6 can be a stainless steel shielding tube, copper shielding tube, aluminum shielding tube, or other metal tubes.

[0047] Reference Figure 7 and Figure 8The Bluetooth temperature probe also includes an anti-dislodgement buckle 7. A groove 11 is provided on the inner wall of the rear end of the needle tube 1. The anti-dislodgement buckle 7 is inserted into the groove 11 to fix the anti-dislodgement buckle 7 to the needle tube 1. The anti-dislodgement buckle 7 is sleeved on the shielding tube 6 and fixedly connected to the shielding tube 6. In this embodiment, the shielding tube 6 also serves as a structural component connecting the needle tube 1 and the handle 2. It needs to be made of rigid metal. The anti-dislodgement buckle 7 and the shielding tube 6 are fixedly connected by glue. The anti-dislodgement buckle 7 then inserts into the groove 11 of the needle tube 1, thus fixing the needle tube 1 to the front end of the shielding tube 6. The handle 2 is then fixed to the rear end of the shielding tube 6 by a threaded connection, indirectly achieving a fixed connection between the handle 2 and the needle tube 1.

[0048] Reference Figure 3 and Figure 11 The anti-dislodgement buckle 7 includes an annular base 71 and multiple elastic cantilever arms 72 disposed on the annular base 71. The front end of each elastic cantilever arm 72 has an outwardly extending buckle 73, which is adapted to a groove 11 on the syringe 1. When the anti-dislodgement buckle 7 is installed on the syringe 1, the elastic cantilever arm 72 is compressed and elastically deformed inward. When the buckle 73 reaches the groove 11, the elastic cantilever arm 72 elastically recovers its deformation outward, causing the buckle 73 to engage with the groove 11, thus achieving a fixed connection between the syringe 1 and the shielding tube 6. This design provides a large pull-out force and prevents easy dislodgement.

[0049] Reference Figure 6 The shielding tube 6 has an external thread 61 in the middle, and the inner wall of the handle 2 has an internal thread 21. The handle 2 is screwed and fixed on the shielding tube 6 to achieve a stable connection between the handle 2 and the shielding tube 6.

[0050] The Bluetooth temperature probe needs to be equipped with a power supply module 10 to provide power for the Bluetooth temperature probe to work. The power supply module 10 is electrically connected to the PCB board 4, so the power supply module 10 needs to be charged.

[0051] Reference Figures 7 to 10 The handle 2 has a charging metal head 8 at its tail, and the ceramic antenna 5 has a charging line 53. The charging metal head 8 is electrically connected to the charging line 53 on the ceramic antenna 5, and the charging line 53 on the ceramic antenna 5 is then electrically connected to the PCB board 4. The PCB board 4 has a spring contact 41, and the needle tube 1 is electrically connected to the PCB board 4 through the spring contact 41. The charging metal head 8 and the needle tube 1 are the positive and negative terminals of the charging circuit, and the power supply module 10 is charged through the PCB board 4.

[0052] Traditional solutions reuse the antenna as a charging cable, which severely impacts the antenna's lifespan and performance. In this application, the charging circuit 53 and the antenna metal layer 52 are respectively disposed on two opposing surfaces of the ceramic substrate 51. This fully utilizes the insulating properties of the ceramic substrate 51, ensuring that the charging circuit 53 and the antenna metal layer 52 do not interfere with each other. Therefore, charging does not affect the antenna's performance or lifespan.

[0053] Reference Figure 8 The Bluetooth temperature probe also includes a second temperature sensor 9 for detecting ambient temperature. The second temperature sensor 9 is electrically connected to the PCB board 4. The inner end of the charging metal head 8 has a receiving hole 81, and the second temperature sensor 9 is disposed in the receiving hole 81. The charging metal head 8 is made of metal, which has good thermal conductivity and heat dissipation, and can basically keep the ambient temperature consistent, making the ambient temperature measurement more accurate.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A Bluetooth temperature probe, characterized in that, include: The needle tube (1) has a groove (11) on the inner wall of its rear end. Handle (2), the end of the handle (2) is provided with a charging metal head (8), the inner wall of the handle (2) is provided with an internal thread (21), and the handle (2) is fixedly connected to the end of the needle tube (1); The first temperature sensor (3) and the PCB board (4) are both set inside the needle tube (1), and the PCB board (4) is provided with a spring piece (41). A ceramic antenna (5) is disposed inside a needle tube (1) and a handle (2). The front end extends into the needle tube (1) and is electrically connected to the PCB board (4), and the rear end extends into the handle (2). The ceramic antenna (5) includes a ceramic substrate (51) and an antenna metal layer (52) disposed on the ceramic substrate (51). The ceramic antenna (5) is provided with a charging line (53). The charging line (53) and the antenna metal layer (52) are respectively disposed on two opposite surfaces of the ceramic substrate (51). The charging metal head (8) is electrically connected to the charging line (53) on the ceramic antenna (5). The charging line (53) on the ceramic antenna (5) is then electrically connected to the PCB board (4). The needle tube (1) is electrically connected to the PCB board (4) through the spring piece (41). The charging metal head (8) and the needle tube (1) are the positive and negative terminals of the charging circuit. The shielding tube (6) is set inside the needle tube (1) and the handle (2) and is sleeved on the outside of the ceramic antenna (5). The front end extends into the needle tube (1) and the rear end extends into the handle (2). The rear end of the ceramic antenna (5) extends beyond the shielding tube (6) to realize the antenna function for transmitting and receiving signals. The length of the active part of the antenna is changed by adjusting the length of the shielding tube (6). An anti-dislodge buckle (7) is inserted into the groove (11) of the needle tube (1) to fix the anti-dislodge buckle (7) to the needle tube (1). The anti-dislodge buckle (7) is sleeved on the shielding tube (6) and fixedly connected to the shielding tube (6). The anti-dislodge buckle (7) includes an annular base (71) and a plurality of elastic cantilever arms (72) disposed on the annular base (71). The front end of the elastic cantilever arm (72) is provided with a buckle (73) facing outward. The buckle (73) is adapted to the groove (11) on the needle tube (1).

2. The Bluetooth temperature probe according to claim 1, characterized in that, The cross-sectional shape of the shielding tube (6) is circular, elliptical or polygonal, and the shielding tube (6) is a stainless steel shielding tube, a copper shielding tube or an aluminum shielding tube.

3. The Bluetooth temperature probe according to claim 1, characterized in that, The anti-detachment buckle (7) and the shielding tube (6) are fixedly connected by glue.

4. The Bluetooth temperature probe according to claim 1, characterized in that, The shielding tube (6) has an external thread (61) in the middle, and the inner wall of the handle (2) has an internal thread (21) corresponding to it. The handle (2) is screwed and fixed on the shielding tube (6).

5. The Bluetooth temperature probe according to claim 1, characterized in that, The Bluetooth temperature probe also includes a second temperature sensor (9) for detecting ambient temperature. The second temperature sensor (9) is electrically connected to the PCB board (4). The inner end of the charging metal head (8) is provided with a receiving hole (81), and the second temperature sensor (9) is disposed in the receiving hole (81).

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