Temperature probe

Abstract

Temperature Probe This application relates to a temperature probe comprising a needle tube (2), a handle (1), a printed circuit board, a rechargeable battery, and a wireless charging coil, wherein the handle (1) is fixedly and hermetically sealed to the needle tube (2), a first internal cavity is provided inside the handle (1), a second internal cavity is provided inside the needle tube (2), the first and second internal cavities are interconnected, the rechargeable battery is electrically connected to the printed circuit board, the printed circuit board is disposed in the second internal cavity, and the wireless charging coil is disposed in the first internal cavity and is electrically connected to the printed circuit board to recharge the rechargeable battery. Figure to be published with the abstract: Figure 1

Description

Title of the invention: Temperature probe technical field

[0001] The present application relates to the field of thermometric instrument technology, in particular to a temperature probe. TECHNICAL CONTEXT

[0002] Bluetooth® temperature probes can directly measure temperature by penetrating the interior of food, allowing the user to easily view real-time internal food temperature data and assisting in smart cooking, and are therefore increasingly used. Existing Bluetooth temperature probes typically include a needle tube, a handle, a temperature sensor, a printed circuit board (PCB), a Bluetooth® module, an antenna, and a power supply module.

[0003] Referring to the patent application under publication number CN220122100U and under the title "New Bluetooth temperature probe", in which a power supply module is a rechargeable battery which must be recharged frequently, a metal charging head and a needle tube are used as the positive and negative poles of the charging circuit, and a PCB board is used to recharge the integrated rechargeable battery, which belongs to the wired charging, and during long-term use, poor contact will occur between the metal charging head and the needle tube, resulting in poor charging effect, and even charging failure, and must be improved. DISCLOSURE OF THE INVENTION

[0004] To solve the technical problems of existing Bluetooth® temperature probes, such as poor contact and poor charging effect, the present invention provides a temperature probe.

[0005] The present application provides the following technical solution: a temperature probe, comprising a needle tube, a handle, a printed circuit board, a rechargeable battery, and a wireless charging coil, wherein the handle is fixedly and hermetically sealed to the needle tube, a first internal cavity is provided inside the handle, a second internal cavity is provided inside the needle tube, the first internal cavity and the second internal cavity are in communication with each other, the rechargeable battery is electrically connected to the printed circuit board, the printed circuit board is disposed in the second internal cavity, and the wireless charging coil is arranged in the first inner cavity and is electrically connected to the printed circuit board to recharge the rechargeable battery.

[0006] By adopting the above technical solution, according to the present application, a wireless charging coil is arranged inside the temperature probe, and the rechargeable battery can be wirelessly recharged by an external wireless charging socket, because the needle tube and the metal charging head are no longer used, problems such as wear of the charging interface and poor charging effect due to bad contact are avoided, and a risk of damage is reduced, so that charging is more convenient and the scientific and technological quality experience is improved.

[0007] Preferably, a connecting pipe hoop is further defined by welding onto the rear end of the needle tube, the connecting pipe hoop is provided with external threads and the handle is attached to the connecting pipe hoop by threading; or a connecting pipe hoop is further defined by welding onto the rear end of the needle tube, the connecting pipe hoop is provided with internal threads, the handle is consequently provided with external threads and the handle is attached to the connecting pipe hoop by threading.

[0008] By adopting the above technical solution, the sealing effect between the needle tube and the handle is good, and the temperature probe can achieve a higher level of sealing.

[0009] Preferably, the temperature probe further comprises a connecting pipe hoop and a locking nut, the front and rear ends of the connecting pipe hoop are provided with external threads, the handle is attached to the connecting pipe hoop by threading; a fixing ring is defined by welding on the rear end of the needle tube, the locking nut is also attached to the connecting pipe hoop by threading, the tail of the locking nut is provided with a stop ring and the stop ring is butted against an end face of the fixing ring.

[0010] By adopting the above technical solution, the strength of the connection between the needle tube and the handle is improved and the sealing performance is also improved.

[0011] Preferably, the temperature probe comprises a food temperature sensor and an ambient temperature sensor; the food temperature sensor and the ambient temperature sensor are both electrically connected to the printed circuit board; the food temperature sensor is located at the front end of the second inner cavity and the ambient temperature sensor is located at the rear end of the first inner cavity; the wireless charging coil comprises a coil body and a magnetic core, the The coil body is wound around the magnetic core and is electrically connected to the printed circuit board via a charging wire. The magnetic core has a central shaft hole. The front section of an ambient temperature sensor lead wire is further sheathed with a first ceramic tube and passes through the central shaft hole. The first ceramic tube is used to insulate the ambient temperature sensor lead wire from the magnetic core, and the rear section of the ambient temperature sensor lead wire is further sheathed with a second ceramic tube to insulate against heat.

[0012] Preferably, the coil body is also reused as the temperature probe antenna, and the outside of the charging wire is further sheathed with a copper antenna gain tube.

[0013] By adopting the above technical solution, according to the present application, no independent antenna is planned, which reduces the number of parts and facilitates management.

[0014] Preferably, the charging wire is sheathed with a third ceramic tube and the copper antenna gain tube is sheathed outside the third ceramic tube.

[0015] Preferably, the second ceramic tube is also located inside the copper antenna gain tube.

[0016] Preferably, the temperature probe further includes an antenna, the antenna is a spiral antenna and is disposed in the first inner cavity, an antenna feed wire passes through the central shaft hole of the wireless charging coil and is electrically connected to the printed circuit board, and the antenna feed wire is sheathed with a fourth ceramic tube.

[0017] Preferably, the temperature probe further comprises an antenna, the antenna being a metallic annular antenna and disposed in the first inner cavity, an antenna feed wire passes through the central shaft hole of the wireless charging coil and is electrically connected to the printed circuit board, and the antenna feed wire is sheathed with a fourth ceramic tube; the tail of the handle is further provided with a metallic cap and the metallic cap is electrically connected to the metallic annular antenna.

[0018] Preferably, the coil body and the magnetic core each have a square cross-section, the peripheral surface of the handle is provided with at least two charging planes parallel to each other and the charging planes are parallel to both sides of the square coil body.

[0019] By adopting the above technical solution, the coil body is adapted to the external transmitting coil, which makes it possible to provide a large energy receiving area and higher charging efficiency.

[0020] Based on all that is described above, the present application has at least one of the following technical benefits:

[0021] 1. According to the present application, a wireless charging coil is arranged at the inside of the temperature probe, and the rechargeable battery can be wirelessly recharged by an external wireless charging socket, so that charging is more convenient and the scientific and technological quality experience is improved;

[0022] 2. According to the present application, no independent antenna is planned, which allows for a reduction in the number of parts and facilitates management;

[0023] 3. The coil body is adapted to the external transmitting coil, which allows to provide a large energy reception area and higher charging efficiency. DESCRIPTION OF THE FIGURES

[0024] [Fig.1] is a three-dimensional view of the temperature probe according to embodiment I of the present application;

[0025] [Fig.2] is an exploded view of the structure of the temperature probe according to Example of implementation I of this application;

[0026] [Fig.3] is a half-section diagram of the structure of the temperature probe according to Example of implementation I of this application;

[0027] [Fig.4] is an enlarged view of A of [Fig.3];

[0028] [Fig.5] is a half-section diagram of the structure of the temperature probe according to Example II of the present application;

[0029] [Fig.6] is an enlarged view of B of [Fig.5];

[0030] [Fig.7] is a half-section diagram of the structure of the temperature probe according to Example III of the present application;

[0031] [Fig.8] is an enlarged view of C of [Fig.7];

[0032] [Fig.9] is a half-section diagram of the structure of the temperature probe according to example of implementation IV of this application;

[0033] [Fig. 10] is an enlarged view of D of [Fig.9];

[0034] [Fig. 11] is a half-section diagram of the temperature probe structure according to the implementation example V of this application;

[0035] [Fig. 12] is an enlarged view of E of [Fig. 11];

[0036] [Fig. 13] is a three-dimensional view of the wireless charging coil according to example VI of the implementation of this application;

[0037] [Fig. 14] is an exploded view of the structure of the wireless charging coil according to embodiment example V of the present application;

[0038] [Fig. 15] is a half-section diagram of the structure of the temperature probe according to embodiment example V of the present application;

[0039] [Fig. 16] is an enlarged view of F of [Fig. 15].

[0040] In the figures, the reference numerals are as follows: 1 - Handle; 101 - First inner cavity; 102 - Charging plane; 2 - Needle tube; 21 - Second inner cavity; 22 - Retaining ring; 3 - Printed circuit board; 4 - Rechargeable battery; 5 - Wireless charging coil; 51 - Coil body; 52 - Magnetic core; 521 - Center shaft hole; 53 - Charging wire; 6 - Connecting tube hoop; 7 - Locking nut; 71 - Stop ring; 8 - Food temperature sensor; 9 - Ambient temperature sensor; 10 - First ceramic tube; 11 - Second ceramic tube; 12 - Antenna copper gain tube; 13 - Third ceramic tube; 14 - Fourth ceramic tube; 15 - Antenna; 16 - Metal cap. DETAILED DESCRIPTION OF THE INVENTION

[0041] The present application will be described in more detail below with reference to Figures 1 to 16.

[0042] Example I:

[0043] With reference to Figures 1 to 4, a temperature probe is disclosed in the embodiment examples of the present application, which comprises a needle tube 2, a handle 1, a printed circuit board 3, a rechargeable battery 4 and a wireless charging coil 5, wherein the handle 1 is fixedly and hermetically connected to the needle tube 2, a first internal cavity 101 is provided inside the handle 1, a second internal cavity 21 is provided inside the needle tube 2, the first internal cavity 101 and the second internal cavity 21 are in communication with each other, the rechargeable battery 4 is electrically connected to the printed circuit board 3,The printed circuit board 3 is arranged in the second internal cavity 21 and the wireless charging coil 5 is arranged in the first internal cavity 101 and is electrically connected to the printed circuit board 3 to recharge the rechargeable battery 4.

[0044] With reference to Figures 2 and 4, the rear end of the needle tube 2 is further welded to a connecting pipe hoop 6, the connecting pipe hoop 6 is completely sealed to the needle tube 2 by circumferential welding, the connecting pipe hoop 6 is provided with external threads and the handle 1 is fixed to the connecting pipe hoop 6 by threading, and a sealing ring is also disposed between the two where appropriate, so that the sealing effect is improved and the temperature probe can achieve a higher level of sealing.

[0045] With reference to [Fig.2], the temperature probe includes a food temperature sensor 8 and an ambient temperature sensor 9, the food temperature sensor 8 and the ambient temperature sensor 9 are both electrically connected to the printed circuit board 3, the food temperature sensor 8 is disposed at the head end (at the level of the needle tip) of the second inner cavity 21 and is used to detect the temperature of the food, the closer to the food to be detected, the more accurate the detection;The ambient temperature sensor 9 is located at the rear end of the first internal cavity 101 and is furthest from the needle tip of the needle tube 2 where the influences of food temperature are weakest. The result is the closest to the ambient temperature and the detected ambient temperature is the most accurate. Once the ambient temperature is measured, the food detection temperature can be temperature compensated, and ultimately a more accurate detection temperature is obtained.

[0046] Referring to [Fig. 4], the wireless charging coil 5 comprises a coil body 51 and a magnetic core 52. The coil body 51 is wound on the magnetic core 52 and is electrically connected to the printed circuit board 3 via a charging wire 53. The magnetic core 52 is provided with a central shaft hole 521. The front section of a lead wire for the ambient temperature sensor 9 is further sheathed with a first ceramic tube 10 and passes through the central hole of the shaft 521. The first ceramic tube 10 is used to insulate the lead wire for the ambient temperature sensor 9 from the magnetic core 52, and the rear section of the lead wire for the ambient temperature sensor 9 is further sheathed with a second ceramic tube 11 for heat insulation.This reduces the influence of the temperature of the needle tube 2 on the feed wire of the ambient temperature sensor 9, and therefore reduces the influence of the temperature of the feed wire of the ambient temperature sensor 9 on the detection of the ambient temperature. The wireless charging coil 5 is here a wireless charging receiving coil, which must be adapted to an external wireless charging transmitting coil for recharging. Since the feed wire of the ambient temperature sensor 9 has a very long length and a relatively small diameter, ideally, a single ceramic tube should be used to protect the feed wire. However, considering that the ceramic tube is thin and long, it is difficult to manufacture. Therefore, the present application adopts two ceramic tubes, namely the first ceramic tube 10 and the second ceramic tube 11, to protect the feed wire and reduce the manufacturing difficulty.

[0047] Referring to [Fig. 4], the coil body 51 is also reused as the antenna 15 of the temperature probe. When the temperature probe is switched on To perform temperature detection, it will not be recharged, and when switched off and recharged, it does not perform temperature detection. Therefore, the coil body 51 will not cause a conflict at the end of its service life and can be reused as antenna 15. Since the coil body 51 is a copper coil identical to the material of the ordinary antenna 15, it can also be used as antenna 15 in terms of material and performance, and the metal part of the coil body 51 is indeed reused. To improve the effect of antenna 15, the outside of the charging wire 53 is further sheathed with a copper antenna gain tube 12. According to this application, no independent antenna 15 is provided, which reduces the number of parts and simplifies management.Since stainless steel is generally selected as the material for the needle tube 2 and zirconia is generally selected as the material for the handle 1, the shielding effect of stainless steel to the signal from antenna 15 is good, but the shielding effect of zirconia to the signal from antenna 15 is poor, and the coil body 51 is arranged in the first internal cavity 101, which helps to reduce the influences on the transmission and reception of the signal from antenna 15.

[0048] Referring to [Fig. 4], the charging wire 53 is sheathed in a third ceramic tube 13, and the antenna copper gain tube 12 is sheathed on the outside of the third ceramic tube 13. The third ceramic tube 13 can act as both an insulator and a thermal insulator. Furthermore, the antenna copper gain tube 12, the charging wire 53, and the third ceramic tube 13 form a coaxial cable with good anti-interference capability and stable signal transmission.

[0049] Referring to [Fig.4], the second ceramic tube 11 is also located inside the copper antenna gain tube 12 and the diameter of the copper antenna gain tube 12 is large to facilitate passage.

[0050] In the present application, a wireless charging coil 5 is disposed inside the temperature probe, and the rechargeable battery 4 can be wirelessly charged by an external wireless charging socket, because the needle tube 2 and the metal charging head are no longer used, problems such as wear of the charging interface and poor charging effect due to bad contact are avoided, and a risk of damage is reduced, so that charging is more convenient and the scientific and technological quality experience is improved.

[0051] Example II:

[0052] With reference to Figures 5 and 6, the difference with embodiment I is that the second ceramic tube 11 is located on the outer side of the copper antenna gain tube 12, the copper antenna gain tube 12 only encloses the third ceramic tube 13 and the charging wire 53, the copper gain tube Antenna 12 has a small diameter, although it is somewhat impractical to pass through, but this saves material and reduces the cost. Other beneficial structures and effects are consistent with embodiment I and will not be repeated here.

[0053] Example III:

[0054] With reference to Figures 7 and 8, the difference from embodiment I is that an independent antenna 15 is adopted in the present application. The temperature probe further comprises an antenna 15. The antenna 15 is a spiral antenna and is disposed in the first internal cavity 101. The antenna feed wire 15 passes through the central shaft hole 521 of the wireless charging coil 5 and is electrically connected to the printed circuit board 3. The antenna feed wire 15 is sheathed in a fourth ceramic tube 14. The fourth ceramic tube 14 may also have a segmented structure to reduce production costs, and the antenna copper gain tube 12 is sheathed on the outside of the fourth ceramic tube 14 to improve the transmit and receive signals of the antenna 15. Other structures and beneficial effects are consistent with the example of implementation I and will not be repeated here.

[0055] Example IV:

[0056] With reference to Figures 9 and 10, the difference from Embodiment III lies in the shape of the antenna 15. The antenna 15 is a metallic annular antenna and is located in the first internal cavity 101. The antenna feed wire 15 passes through the central shaft hole 521 of the wireless charging coil 5 and is electrically connected to the printed circuit board 3. The antenna feed wire 15 is further sheathed by a fourth ceramic tube 14 and the antenna copper gain tube 12. The handle tail 1 is further provided with a metallic cap 16, and the metallic cap 16 is electrically connected to the metallic annular antenna 15 to improve the transmission and reception of signals from the antenna 15. Other structures and beneficial effects are consistent with Embodiment III and will not be repeated. here.

[0057] Example V:

[0058] Referring to Figures 11 and 12, the internal structure is exactly the same as that of embodiment III, except that the shape of the connecting pipe hoop 6 is different. The temperature probe further comprises a connecting pipe hoop 6 and a locking nut 7; the front and rear ends of the connecting pipe hoop 6 are provided with external threads; the handle 1 is attached to the connecting pipe hoop 6 by threading; the rear end of the needle tube 2 is welded to a retaining ring 22; the locking nut 7 is also attached to the connecting pipe hoop 6 by threading; the shank of the locking nut 7 is provided with a stop ring 71 and The stop ring 71 is butted against one end face of the retaining ring 22. The connection strength between the needle tube 2 and the handle 1 is improved, and the sealing performance is also enhanced. Other structures and beneficial effects are consistent with embodiment III and will not be repeated here.

[0059] Example VI:

[0060] With reference to Figures 13 and 14, the difference with embodiment I lies in the fact that the coil body 51 and the magnetic core 52 each have a square cross-section, the peripheral surface of the handle 1 is provided with at least two charging planes 102 parallel to each other, and the charging planes 102 are parallel to both sides of the square coil body 51. The coil body 51 is adapted to the outer transmitting coil, thus providing a large energy receiving area and higher charging efficiency.

[0061] Example VII:

[0062] Referring to Figures 15 and 16, the internal structure is exactly the same as that of embodiment III, except that the shape of the connecting pipe hoop 6 is different. In general, the needle tube 2 and the connecting pipe hoop 6 are made of stainless steel, and the handle 1 is made of zirconia. The coefficient of thermal expansion of zirconia is higher than that of stainless steel, and when the temperature of the temperature probe is high under certain particular circumstances, such as when the temperature is above 300 °C, the amplitude of the thermal expansion of the inner threads of the handle 1 is greater than the amplitude of the thermal expansion of the outer threads of the connecting pipe hoop 6. This causes an increase in the gap between the inner and outer threads and a poor sealing effect of the structure in embodiment III.Referring to Figures 15 and 16, as an example of embodiment VII of the temperature probe of this application, the difference with embodiment III lies in the method of the leak-proof connection between the needle tube 2 and the handle 1. Specifically, the rear end of the needle tube 2 is welded to a connecting pipe hoop 6, the connecting pipe hoop 6 has internal threads, the handle 1 consequently has external threads, and the handle 1 is attached to the connecting pipe hoop 6 by threading.Once the structure is modified, the amplitude of thermal expansion of the outer threads of the handle 1 is always greater than the amplitude of thermal expansion of the inner threads of the connecting pipe hoop 6, so that the inner and outer threads are tighter relative to each other and the sealing effect does not deteriorate under high temperature conditions.

[0063] The embodiment examples below are preferred and non-limiting embodiment examples for the scope of the present invention; therefore, any equivalent modifications respecting the structures, forms and principles of this application must be included within the scope of the present invention.

Claims

Demands

1. Temperature probe, characterized in that it comprises a needle tube (2), a handle (1), a printed circuit board (3), a rechargeable battery (4) and a wireless charging coil (5), wherein the handle (1) is fixedly and hermetically connected to the needle tube (2), a first inner cavity (101) is provided inside the handle (1), a second inner cavity (21) is provided inside the needle tube (2), the first inner cavity (101) and the second inner cavity (21) are in communication with each other, the rechargeable battery (4) is electrically connected to the printed circuit board (3), the printed circuit board (3) is disposed in the second inner cavity (21) and the wireless charging coil (5) is disposed in the first inner cavity (101) and is electrically connected to the printed circuit board (3) to recharge the rechargeable battery (4).

2. Temperature probe according to claim 1, characterized in that, a connecting pipe hoop (6) is further defined by welding on the rear end of the needle tube (2), the connecting pipe hoop (6) is provided with external threads and the handle (1) is fixed to the connecting pipe hoop (6) by threading; or a connecting pipe hoop (6) is further defined by welding on the rear end of the needle tube (2), the connecting pipe hoop (6) is provided with internal threads, the handle (1) is consequently provided with external threads and the handle (1) is fixed to the connecting pipe hoop (6) by threading.

3. Temperature probe according to claim 1, characterized in that, the temperature probe further comprises a connecting pipe hoop (6) and a locking nut (7), the front and rear ends of the connecting pipe hoop (6) are provided with external threads, the handle (1) is fixed to the connecting pipe hoop (6) by threading; a fixing ring (22) is defined by welding on the rear end of the needle tube (2), the locking nut (7) is also fixed to the connecting pipe hoop (6) by threading, the tail of the locking nut (7) is provided with a stop ring (71) and the stop ring (71) is butted against an end face of the fixing ring (22).

4. Temperature probe according to any one of claims 1 to 3, characterized in that, the temperature probe comprises a food temperature sensor (8) and an ambient temperature sensor (9), the food temperature sensor (8) and the ambient temperature sensor (9) are both electrically connected to the printed circuit board (3), the food temperature sensor (8) is disposed at the front end of the second inner cavity (21) and the ambient temperature sensor (9) is disposed at the rear end of the first inner cavity (101);The wireless charging coil (5) comprises a coil body (51) and a magnetic core (52). The coil body (51) is wound around the magnetic core (52) and is electrically connected to the printed circuit board (3) via a charging wire (53). The magnetic core (52) is provided with a central shaft hole (521). The front section of a lead wire from the ambient temperature sensor (9) is further sheathed with a first ceramic tube (10) and passes through the central shaft hole (521). The first ceramic tube (10) is used to insulate the lead wire from the ambient temperature sensor (9) from the magnetic core (52), and the rear section of the lead wire from the ambient temperature sensor (9) is further sheathed with a second ceramic tube (11) to insulate against heat.

5. Temperature probe according to claim 4, characterized in that the coil body (51) is also reused as the antenna of the temperature probe, and the outside of the charging wire (53) is further sheathed with a copper antenna gain tube (12).

6. Temperature probe according to claim 5, characterized in that the charging wire (53) is sheathed with a third ceramic tube (13) and the antenna copper gain tube (12) is sheathed outside the third ceramic tube (13).

7. Temperature probe according to claim 6, characterized in that the second ceramic tube (11) is also located inside the copper antenna gain tube (12).

8. A temperature probe according to claim 4, characterized in that the temperature probe further comprises an antenna (15), the antenna (15) being a spiral antenna disposed in the first internal cavity (101), a feed wire for the antenna (15) passing through the central shaft hole (521) of the wireless charging coil (5) and is electrically connected to the printed circuit board (3), and the antenna feed wire (15) is sheathed with a fourth ceramic tube (14).

9. Temperature probe according to claim 4, characterized in that the temperature probe further comprises an antenna (15), the antenna (15) is a metallic annular antenna and disposed in the first inner cavity (101), a feed wire of the antenna (15) passes through the central shaft hole (521) of the wireless charging coil (5) and is electrically connected to the printed circuit board (3), and the feed wire of the antenna (15) is sheathed with a fourth ceramic tube (14); the tail of the handle (1) is further provided with a metallic cap (16) and the metallic cap (16) is electrically connected to the metallic annular antenna (15).

10. Temperature probe according to claim 4, characterized in that the coil body (51) and the magnetic core (52) each have a square cross-section, the peripheral surface of the handle (1) is provided with at least two charging planes (102) parallel to each other and the charging planes (102) are parallel to both sides of the square coil body (51).

Images