Temperature probe

Abstract

Temperature probe The present 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 tightly connected to the needle tube (2), a first inner cavity is provided inside the handle (1), a second inner cavity is provided inside the needle tube (2), the first inner cavity and the second inner cavity are in communication with each other, the rechargeable battery is electrically connected to the printed circuit board, the printed circuit board is arranged in the second inner 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. 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 relates to a temperature probe. TECHNICAL CONTEXT

[0002] Bluetooth® temperature probes can directly measure the temperature by penetrating inside the food, which can easily view the internal temperature data of the food in real time for the user and help in smart cooking and are therefore increasingly widely used. Existing Bluetooth temperature probes generally 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 the publication number CN220122100U and under the title "Novel Bluetooth Temperature Probe", in which a power supply module is a rechargeable battery which needs to be recharged frequently, a charging metal head and a needle tube are used as the positive pole and negative pole of the charging circuit, and a PCB board is used to recharge the built-in rechargeable battery, which belongs to wired charging, and during long-term use, poor contact will occur between the charging metal head and the needle tube, resulting in poor charging effect, and even charging failure and needs to 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 a 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 tightly connected to the needle tube, a first inner cavity is provided inside the handle, a second inner cavity is provided inside the needle tube, the first inner cavity and the second inner cavity are in communication with each other, the rechargeable battery is electrically connected to the printed circuit board, the printed circuit board is arranged in the second inner cavity and the wireless charging coil is disposed in the first interior 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 charged by an external wireless charging socket, because the needle tube and the charging metal head are no longer used, the problems such as the wear of the charging interface and the poor charging effect due to the poor contact are avoided, and a risk of damage is reduced, so that the charging is more convenient and the experience of scientific and technological quality is improved.

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

[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 fixed 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 fixed to the connecting pipe hoop by threading, the tail of the locking nut is provided with a stop ring, and the stop ring is abutted against an end face of the fixing ring.

[0010] By adopting the above technical solution, a connection strength 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 circuit board, the food temperature sensor is arranged at the front end of the second inner cavity, and the ambient temperature sensor is arranged at the rear end of the first inner cavity; the wireless charging coil comprises a coil body and a magnetic core, the coil body is wound on the magnetic core and is electrically connected to the circuit board via a charging wire, the magnetic core is provided with a central shaft hole, the front section of a lead wire of the ambient temperature sensor is further sheathed with a first ceramic tube and passes through the central shaft hole, the first ceramic tube is used to insulate the lead wire of the ambient temperature sensor from the magnetic core, and the rear section of the lead wire of the ambient temperature sensor is further sheathed with a second ceramic tube to insulate heat.

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

[0013] By adopting the above technical solution, according to the present application, no independent antenna is provided, which makes it possible to reduce the number of parts and facilitate management.

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

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

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

[0017] Preferably, the temperature probe further comprises an antenna, the antenna is a metal ring antenna and arranged in the first inner cavity, a lead wire of the antenna passes through the central shaft hole of the wireless charging coil and is electrically connected to the circuit board, and the lead wire of the antenna is sheathed with a fourth ceramic tube; the tail of the handle is further provided with a metal cap, and the metal cap is electrically connected to the metal ring 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 matched with the external transmitting coil, thereby providing a large power 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 inside the temperature probe, and the rechargeable battery can be wirelessly charged by an external wireless charging socket, so that charging is more convenient and the experience of scientific and technological quality is improved;

[0022] 2. According to the present application, no independent antenna is provided, which helps reduce the number of parts and facilitate management;

[0023] 3. The coil body is matched to the external transmitting coil, which makes it possible to provide a large energy receiving area and higher charging efficiency. DESCRIPTION OF FIGURES

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

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

[0026] [Fig.3] is a half-section diagram of the structure of the temperature probe according to embodiment 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 embodiment 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 embodiment 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 embodiment IV of the present application;

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

[0034] [Fig. 11] is a half-sectional diagram of the structure of the temperature probe according to embodiment example V of the present 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 embodiment VI of this application;

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

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

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

[0040] In the figures, the references are as follows: 1 - Handle; 101 - First inner cavity; 102 - Charging plane; 2 - Needle tube; 21 - Second inner cavity; 22 - Fixing ring; 3 - Printed circuit board; 4 - Rechargeable battery; 5 - Wireless charging coil; 51 - Coil body; 52 - Magnetic core; 521 - Central shaft hole; 53 - Charging wire; 6 - Connecting pipe hoop; 7 - Lock 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] Referring to Figures 1 to 4, a temperature probe is disclosed in the exemplary embodiments 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 tightly 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 arranged in the second inner cavity 21 and the wireless charging coil 5 is arranged in the first inner cavity 101 and is electrically connected to the printed circuit board 3 to recharge the rechargeable battery 4.,

[0044] Referring to Figures 2 and 4, the rear end of the needle tube 2 is further welded with a connecting pipe hoop 6, the connecting pipe hoop 6 is completely sealed with respect 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 provided therebetween if necessary, so that the sealing effect is improved and the temperature probe can achieve a higher sealing level.

[0045] Referring to [Fig.2], 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 circuit board 3, the food temperature sensor 8 is arranged at the head end (at 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 arranged at the rear end of the first inner cavity 101 and is the farthest from the needle tip of the needle tube 2 where the influences of the food temperature are the smallest, 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 finally 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 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 room temperature sensor lead wire 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 room temperature sensor lead wire 9 from the magnetic core 52, and the rear section of the room temperature sensor lead wire 9 is further sheathed with a second ceramic tube 11 to insulate heat,which can reduce the influences of the temperature of the needle tube 2 on the supply wire of the ambient temperature sensor 9 and thus reduce the influences of the temperature of the supply wire of the ambient temperature sensor 9 on the detection of the ambient temperature. The wireless charging coil 5 herein is a wireless charging receiving coil, which needs to be matched with an outdoor wireless charging transmitting coil for charging. Since the supply wire of the ambient temperature sensor 9 has a very long length and a relatively small diameter, ideally, only one ceramic tube should be used to protect the supply wire, but taking into account that the ceramic tube is thin and long, it is difficult to manufacture, the present application adopts two ceramic tubes, namely the first ceramic tube 10 and the second ceramic tube 11 to protect the supply 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 turned on to perform temperature detection, it will not be recharged, and when it is turned off and recharged, it does not perform temperature detection, therefore, the coil body 51 will not cause conflict at the end of the use time and can be reused as the antenna 15. Since the coil body 51 is a copper coil which is the same as the material of the ordinary antenna 15, it can also be used as the antenna 15 from the material and performance points of view, and the metal part of the coil body 51 is well reused. In order to improve the effect of the antenna 15, the outside of the charging wire 53 is further sheathed with an antenna copper gain tube 12. According to the present application, no independent antenna 15 is provided, thereby reducing the number of parts and facilitating management.Since stainless steel is generally selected as the material of the needle tube 2 and zirconia is generally selected as the material of the handle 1, the shielding effect of the stainless steel to the signal of the antenna 15 is good, but the shielding effect of the zirconia to the signal of the antenna 15 is poor, and the coil body 51 is arranged in the first inner cavity 101, thereby reducing the influences on the transmission and reception of the signal of the antenna 15.

[0048] Referring to [Fig.4], 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. The third ceramic pipe 13 can play an insulating role on the one hand, and play a thermal insulation role on the other hand. In addition, the antenna copper gain tube 12, the charging wire 53 and the third ceramic tube 13 form a coaxial cable with good anti-interference ability and signal transmission stability.

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

[0050] In the present application, a wireless charging coil 5 is arranged 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 charging metal head are no longer used, the problems such as the wear of the charging interface and the poor charging effect due to the poor contact are avoided, and a risk of damage is reduced, so that the charging is more convenient and the experience of scientific and technological quality is improved.

[0051] Example II:

[0052] Referring to Figures 5 and 6, the difference with the embodiment I is that the second ceramic tube 11 is located on the outer side of the antenna copper gain tube 12, the antenna copper gain tube 12 only envelops the third ceramic tube 13 and the recharging wire 53, the copper gain tube antenna 12 has a small diameter, although it is inconvenient to pass through, but the material is saved and the cost is reduced. Other structures and beneficial effects are consistent with embodiment 1 and will not be repeated here.

[0053] Example III:

[0054] Referring to Figures 7 and 8, the difference with the 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 arranged in the first inner cavity 101, the antenna lead 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 lead wire 15 is sheathed with a fourth ceramic tube 14. The fourth ceramic tube 14 may also have a segmented structure to reduce the production cost, and the antenna copper gain tube 12 is sheathed outside the fourth ceramic tube 14 to improve the transmitting and receiving signals of the antenna 15. Other structures and beneficial effects are consistent with the embodiment example I and will not be repeated here.

[0055] Example IV:

[0056] Referring to Figures 9 and 10, the difference with the embodiment III is that the shape of the antenna 15 is different, the antenna 15 is a metal ring antenna and arranged in the first inner cavity 101, the lead wire of the antenna 15 passes through the central shaft hole 521 of the wireless charging coil 5 and is electrically connected to the circuit board 3, and the lead wire of the antenna 15 is further sheathed with a fourth ceramic tube 14 and the antenna copper gain tube 12. The tail of the handle 1 is further provided with a metal cap 16 and the metal cap 16 is electrically connected to the metal ring antenna 15 to improve the signal transmission and reception of the antenna 15. Other structures and beneficial effects are consistent with the embodiment III and will not be not repeated here.

[0057] Example V:

[0058] Referring to Figures 11 and 12, the internal structure is exactly the same as that of the embodiment example 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 fixed to the connecting pipe hoop 6 by threading; the rear end of the needle tube 2 is welded with a fixing ring 22, 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 abutted against an end face of the fixing ring 22. A connection strength between the needle tube 2 and the handle 1 is improved and the sealing performance is also improved. Other structures and beneficial effects are consistent with the embodiment example III and will not be repeated here.

[0059] Example VI:

[0060] Referring to Figures 13 and 14, the difference with the embodiment I is 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 matched to the outer transmitting coil, thereby providing a large power receiving area and higher charging efficiency.

[0061] Example VII:

[0062] Referring to Figures 15 and 16, the inner structure is exactly the same as that of the embodiment example 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, and the thermal expansion coefficient of zirconia is greater than that of stainless steel, and when the temperature of the temperature probe is high under certain special circumstances, such as when the temperature is higher than 300°C, the magnitude of the thermal expansion of the inner threads of the handle 1 is greater than the magnitude of the thermal expansion of the outer threads of the connecting pipe hoop 6, which causes the gap between the inner threads and outer threads to increase and the sealing effect of the structure in the embodiment example III to be poor.Referring to Figures 15 and 16, as embodiment VII of the temperature probe of the present application, the difference with embodiment III is that the sealing connection manner between the needle tube 2 and the handle 1 is different. Particularly, the rear end of the needle tube 2 is further welded with a connecting pipe hoop 6, the connecting pipe hoop 6 is provided with internal threads, the handle 1 is correspondingly provided with external threads, and the handle 1 is fixed to the connecting pipe hoop 6 by threading.After the structure is modified, the thermal expansion amplitude of the outer threads of the handle 1 is always greater than the thermal expansion amplitude 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 the condition of high temperature.

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

Claims

Claims

1. A temperature probe, characterized in that it comprises a needle tube (2), a handle (1), a circuit board (3), a rechargeable battery (4) and a wireless charging coil (5), wherein the handle (1) is fixedly and tightly 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 circuit board (3), the circuit board (3) is arranged in the second inner cavity (21), and the wireless charging coil (5) is arranged in the first inner cavity (101) and is electrically connected to the circuit board (3) to recharge the rechargeable battery (4).

2. A 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 correspondingly provided with external threads and the handle (1) is fixed to the connecting pipe hoop (6) by threading.

3. A 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 abutted against an end face of the fixing ring (22).

4. A temperature probe according to 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 arranged at the front end of the second inner cavity (21) and the ambient temperature sensor (9) is arranged 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 on the magnetic core (52) and is electrically connected to the 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 room temperature sensor lead wire (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 for insulating the room temperature sensor lead wire (9) from the magnetic core (52), and the rear section of the room temperature sensor lead wire (9) is further sheathed with a second ceramic tube (11) for heat insulation.;

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

6. A 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 antenna copper 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) is a spiral antenna and arranged in the first inner cavity (101), a lead 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 antenna lead wire (15) is sheathed with a fourth ceramic tube (14).

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

10. A 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 recharging planes (102) parallel to each other, and the recharging planes (102) are parallel to both sides of the square coil body (51).

Images