Waterproof wireless temperature probe

Abstract

The utility model relates to a waterproof wireless temperature probe which comprises a needle tube, a ceramic handle, a metal tail cover and a circuit board, the circuit board is arranged in a containing cavity of the needle tube and the ceramic handle, external threads are arranged at the two ends of the ceramic handle, a groove is formed in the end face of the tail end of the needle tube, internal threads are arranged at the position of the groove, and the metal tail cover is arranged in the containing cavity of the needle tube. The metal tail cover is provided with internal threads, one end of the ceramic handle is in threaded connection with the tail end of the needle tube, the other end of the ceramic handle is in threaded connection with the metal tail cover, and waterproof sealant is arranged at the threaded connection positions. The two ends of the ceramic handle are sealed through the threads and the waterproof sealant, particularly, the groove is formed in the end face of the tail end of the needle tube to form the U-shaped gap, the U-shaped gap is completely filled with the waterproof sealant, the good sealing and waterproof effect is achieved, the waterproof structure is simple in design, the part machining precision requirement is low, and the waterproof effect is good. The waterproof effect is good, the assembly process is simplified, the reject ratio is reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of temperature measuring instruments, and in particular to a waterproof wireless temperature probe. Background Art

[0002] Wireless temperature probes, used to measure food temperatures, generally require a waterproof rating of at least IPX7. To achieve this, existing wireless temperature probes typically use sealing rings or snap-on seals. For example, Chinese utility model patent publication number CN220122100U employs a snap-on seal, while Chinese invention patent publication number CN118624046A employs a sealing ring. Due to the relatively small radial dimensions of wireless temperature probes, these probes present technical challenges such as high component precision, complex sealing structures, difficulty in assembly, and a high defect rate. Utility Model Content

[0003] In order to solve the technical problems of complex sealing structure and difficult assembly of wireless temperature probes in the prior art, the utility model provides a waterproof wireless temperature probe.

[0004] The technical solution provided in this application is as follows: a waterproof wireless temperature probe, comprising a needle tube, a ceramic handle, a metal tail cover and a circuit board, wherein the circuit board is arranged in a accommodating cavity of the needle tube and the ceramic handle, both ends of the ceramic handle are provided with external threads, the end face of the tail end of the needle tube is provided with a groove, the groove is provided with an internal thread, the metal tail cover is provided with an internal thread, one end of the ceramic handle is screwed to the tail end of the needle tube, and the other end is screwed to the metal tail cover, and waterproof sealant is provided at the screw connections.

[0005] By adopting the above technical solution, both ends of the ceramic handle of the present application are sealed by means of threads and waterproof sealant, especially a groove is set on the end face of the tail end of the needle tube to form a "U"-shaped gap, and this "U"-shaped gap is completely filled with waterproof sealant to achieve a good sealing and waterproof effect. The waterproof structure of the present application is simple in design, has low requirements for parts processing precision, has a good waterproof effect, simplifies the assembly process, reduces the defective rate, and reduces manufacturing costs.

[0006] Preferably, the ends of the needle tube and the metal tail cover are both provided with an annular glue storage groove.

[0007] Preferably, the needle tube includes a metal connecting tube and a needle tube body, the head end of the metal connecting tube is inserted into the needle tube body and fixedly connected to the needle tube body by circumferential welding, and the groove and internal thread are provided on the metal connecting tube.

[0008] Preferably, the central aperture of the metal connecting pipe is consistent, and the wall thickness of the tail end increases gradually to process the groove and the internal thread.

[0009] Preferably, the position of the circumferential weld is at the safety line of the temperature probe.

[0010] Preferably, an internal connector is fixedly provided at the tail end of the circuit board, and a flange is provided at the tail end of the internal connector. The diameter of the flange is larger than the inner diameter of the ceramic handle, and the flange is located between the metal tail cover and the ceramic handle to limit the position of the circuit board in the ceramic handle and the needle tube; the internal connector is electrically connected to the circuit board and the metal tail cover.

[0011] Preferably, a food temperature sensor, an ambient temperature sensor, an antenna, a battery and a V-shaped contact spring are provided on the circuit board, and the circuit board is electrically connected to the needle tube via the V-shaped contact spring.

[0012] Preferably, the tail end of the circuit board is also fixed with an internal connecting piece, and the internal connecting piece is electrically connected to the circuit board and the metal tail cover; the internal connecting piece includes a fixing tube, the ambient temperature sensor is arranged in the fixing tube, and thermal conductive glue is also provided between the fixing tube and the ambient temperature sensor, the tail end of the fixing tube is provided with a protrusion, and the metal tail cover is provided with a through hole at the corresponding position, the protrusion is embedded in the through hole and exposes the surface of the metal tail cover to sense the ambient temperature.

[0013] Preferably, the protrusion and the metal tail cover are fixed and sealed by welding; a metal ring wall is further provided on the inner side of the metal tail cover, and the fixing tube is fitted with the inner wall of the metal ring wall, or a thermal conductive glue is provided between the fixing tube and the metal ring wall.

[0014] Preferably, the tail of the metal tail cover is provided with a brim-shaped protrusion for preventing rolling.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. Both ends of the ceramic handle of this application are sealed by using threads and waterproof sealant, which can achieve a good sealing and waterproof effect;

[0017] 2. The waterproof structure of this application is simple in design and requires low precision in parts processing, which simplifies the assembly process, reduces the defect rate, and reduces manufacturing costs;

[0018] 3. A weld will be left at the location where the metal connecting tube and the needle tube body are circumferentially welded. By designing the length of the metal connecting tube, it can be used as a safety line for the wireless temperature probe, eliminating the step of engraving the safety line later and saving process costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional diagram of the waterproof wireless temperature probe described in Example 1 of the present application;

[0020] Figure 2This is a schematic diagram of a half-section structure of the waterproof wireless temperature probe described in Example 1 of the present application;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is an exploded view of the waterproof wireless temperature probe described in Example 1 of the present application;

[0023] Figure 5 This is a three-dimensional diagram of the metal tail cover of the waterproof wireless temperature probe described in Example 1 of the present application;

[0024] Figure 6 This is a three-dimensional diagram of the metal connecting tube in the waterproof wireless temperature probe described in Example 1 of the present application;

[0025] Figure 7 This is a partially enlarged view of the half-section structure of the waterproof wireless temperature probe described in Example 2 of the present application;

[0026] Figure 8 This is a schematic diagram of the decomposed structure of the waterproof wireless temperature probe described in Example 2 of the present application.

[0027] Explanation of the accompanying reference numerals: 1. needle tube; 11. metal connecting tube; 111. groove; 112. annular glue storage tank; 12. needle tube body; 13. circumferential welding; 2. ceramic handle; 3. metal tail cover; 31. annular glue storage tank; 32. brim-shaped protrusion; 33. through hole; 34. metal ring wall; 4. circuit board; 41. V-shaped contact spring; 42. ambient temperature sensor; 5. waterproof sealant; 6. internal connecting part; 61. flange edge; 62. fixing cylinder; 621. protrusion. DETAILED DESCRIPTION

[0028] The following is combined with Figures 1 to 8 This application is described in further detail.

[0029] Example 1:

[0030] Reference Figures 1 to 4 , Example 1 of the present application discloses a waterproof wireless temperature probe, including a needle tube 1, a ceramic handle 2, a metal tail cover 3 and a circuit board 4, the circuit board 4 is arranged in the accommodating cavity of the needle tube 1 and the ceramic handle 2, both ends of the ceramic handle 2 are provided with external threads, the end face of the tail end of the needle tube 1 is provided with a groove 111, the groove 111 is provided with an internal thread, the metal tail cover 3 is provided with an internal thread, one end of the ceramic handle 2 is screwed to the tail end of the needle tube 1, and the other end is screwed to the metal tail cover 3, and waterproof sealant 5 is provided at the screw connection.

[0031] Reference Figure 5 and Figure 6The ends of the needle tube 1 and the metal tail cover 3 are both provided with annular glue storage grooves 112 and 31. Since the amount of waterproof sealant 5 that can be accommodated at the threaded connection is small, it is easy to have voids and discontinuities, and the waterproof effect is not reliable. After the annular glue storage grooves 112 and 31 are provided, the waterproof sealant 5 here forms a complete ring shape with a larger cross-sectional area, which is less likely to have voids and discontinuities, so the waterproof effect is better.

[0032] Reference Figure 1 and Figure 4 The needle tube 1 comprises a metal connecting tube 11 and a needle tube body 12. The head end of the metal connecting tube 11 is inserted into the needle tube body 12 and is fixedly connected to the needle tube body 12 by a circumferential weld 13. The groove 111 and the internal thread are provided on the metal connecting tube 11. Figure 3 and Figure 6 The central aperture of the metal connecting tube 11 is uniform, and the wall thickness of the tail end gradually increases to form the groove 111 and the internal thread. The traditional needle tube 1 has a relatively thin wall thickness, and it is impossible to form a structure such as the groove 111. Therefore, the present application separates the needle tube 1 into the metal connecting tube 11 and the needle tube body 12. The needle tube body 12 can still adopt a thin-walled tube structure. The metal connecting tube 11 fully utilizes its own shape and adopts an uneven wall thickness structure. The tail end of the metal connecting tube 11 is thicker, which makes it easier to form the groove 111 and the internal thread.

[0033] Reference Figure 1 The circumferential weld 13 is located at the safety line of the temperature probe. The circumferential weld 13 is generally laser welded, leaving a weld seam that can serve as the safety line of the wireless temperature probe, eliminating the need for subsequent engraving of the safety line and saving process costs.

[0034] Reference Figure 2 and Figure 3 The tail end of the circuit board 4 is also fixed with an internal connector 6, and the tail end of the internal connector 6 is provided with a flange edge 61. The diameter of the flange edge 61 is larger than the inner diameter of the ceramic handle 2. The flange edge 61 is located between the metal tail cover 3 and the ceramic handle 2 to limit the position of the circuit board 4 in the ceramic handle 2 and the needle tube 1 to prevent the circuit board 4 from axial movement; the internal connector 6 is electrically connected to the circuit board 4 and the metal tail cover 3.

[0035] Reference Figure 4, the circuit board 4 is provided with a food temperature sensor, an ambient temperature sensor, an antenna, a battery and a V-shaped contact spring 41, and the circuit board 4 is electrically connected to the needle tube 1 through the V-shaped contact spring 41. The circuit board 4 of the present application is made into an integrated long strip plate, and all electronic components and antennas are integrated on this board. No other circuit connections are required, and the assembly process is simpler. The middle part of the V-shaped contact spring 41 is welded to the circuit board 4. Due to its good elasticity, the elastic sheets on both sides are in elastic contact with the inner wall of the needle tube 1. This design is simple to assemble and has a good contact effect. Since the metal tail cover 3 and the needle tube 1 are both electrically connected to the circuit board 4, they can be used as positive and negative poles for battery charging.

[0036] Reference Figure 1 and Figure 5 The tail of the metal tail cover 3 is provided with a brim-shaped protrusion 32 for anti-rolling. When the wireless temperature probe is placed on the desktop, it can effectively prevent it from rolling and falling. In this way, the ceramic handle 2 does not need to have other anti-rolling features, reducing the processing difficulty and cost of the ceramic handle 2.

[0037] Both ends of the ceramic handle 2 of the present application are sealed by means of threads and waterproof sealant 5, especially a groove 111 is provided on the end face of the tail end of the needle tube 1 to form a "U"-shaped gap, and this "U"-shaped gap is completely filled with waterproof sealant 5 to achieve a good sealing and waterproof effect. The waterproof structure of the present application is simple in design, has low requirements for parts processing precision, has a good waterproof effect, simplifies the assembly process, reduces the defective rate, and reduces manufacturing costs.

[0038] Example 2:

[0039] Reference Figure 7 and Figure 8 , as the second embodiment of the waterproof wireless temperature probe described in the present application, it is different from the first embodiment in that an internal connector 6 is fixed to the tail end of the circuit board 4, and the internal connector 6 is electrically connected to the circuit board 4 and the metal tail cover 3; the internal connector 6 includes a fixing tube 62, and the ambient temperature sensor 42 is arranged in the fixing tube 62, and a thermal conductive glue is also provided between the fixing tube 62 and the ambient temperature sensor 42. A protrusion 621 is provided at the tail end of the fixing tube 62, and a through hole 33 is provided at the corresponding position of the metal tail cover 3. The protrusion 621 is embedded in the through hole 33 and exposes the surface of the metal tail cover 3 to better sense the ambient temperature.

[0040] In this embodiment, since the protrusion 621 on the fixing cylinder 62 is exposed to the surface of the metal tail cover 3, and thermal conductive glue is provided between the fixing cylinder 62 and the ambient temperature sensor 42, the metal tail cover 3 and the internal connecting member 6 are both metals with excellent thermal conductivity. The temperature of the fixing cylinder 62 can better reflect the ambient temperature, so the ambient temperature sensor 42 can better sense the ambient temperature.

[0041] Reference Figure 7 The protrusion 621 and the metal tail cover 3 are welded and sealed together. A metal ring wall 34 is also provided on the inside of the metal tail cover 3, and the fixed tube 62 is in contact with the inner wall of the metal ring wall 34 (or a thermally conductive adhesive is provided between the fixed tube 62 and the metal ring wall 34). Because the metal ring wall 34 on the inside of the metal tail cover 3 is in contact with the fixed tube 62, the thermal conductivity between the metal tail cover 3 and the fixed tube 62 is improved, and the temperature of the fixed tube 62 can better reflect the ambient temperature. Other structures and beneficial effects are consistent with those of the first embodiment and are not further described here.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A waterproof wireless temperature probe, comprising a needle tube (1), a ceramic handle (2), a metal tail cover (3) and a circuit board (4), wherein the circuit board (4) is arranged in a receiving cavity of the needle tube (1) and the ceramic handle (2), and is characterized in that: Both ends of the ceramic handle (2) are provided with external threads, the end surface of the tail end of the needle tube (1) is provided with a groove (111), the groove (111) is provided with an internal thread, and the metal tail cover (3) is provided with an internal thread. One end of the ceramic handle (2) is screwed to the tail end of the needle tube (1), and the other end is screwed to the metal tail cover (3), and waterproof sealant (5) is provided at the screw connection.

2. The waterproof wireless temperature probe according to claim 1, characterized in that: An annular glue storage groove is provided at the ends of the needle tube (1) and the metal tail cover (3).

3. The waterproof wireless temperature probe according to claim 1, characterized in that: The needle tube (1) comprises a metal connecting tube (11) and a needle tube body (12); the head end of the metal connecting tube (11) is inserted into the needle tube body (12) and is fixedly connected to the needle tube body (12) by circumferential welding (13); and the groove (111) and the internal thread are provided on the metal connecting tube (11).

4. The waterproof wireless temperature probe according to claim 3, characterized in that: The central aperture of the metal connecting pipe (11) is consistent, and the wall thickness of the tail end gradually increases to form a groove (111) and an internal thread.

5. The waterproof wireless temperature probe according to claim 3, characterized in that: The position of the circumferential weld (13) is at the safety line of the temperature probe.

6. The waterproof wireless temperature probe according to claim 1, characterized in that: The rear end of the circuit board (4) is also fixedly provided with an internal connector (6), and the rear end of the internal connector (6) is provided with a flange edge (61), the diameter of the flange edge (61) is larger than the inner diameter of the ceramic handle (2), and the flange edge (61) is located between the metal tail cover (3) and the ceramic handle (2) to limit the position of the circuit board (4) in the ceramic handle (2) and the needle tube (1); the internal connector (6) is electrically connected to the circuit board (4) and the metal tail cover (3).

7. The waterproof wireless temperature probe according to claim 1, characterized in that: The circuit board (4) is provided with a food temperature sensor, an ambient temperature sensor, an antenna, a battery, and a V-shaped contact spring (41). The circuit board (4) is electrically connected to the needle tube (1) via the V-shaped contact spring (41).

8. The waterproof wireless temperature probe according to claim 7, characterized in that: The tail end of the circuit board (4) is also fixedly provided with an internal connector (6), and the internal connector (6) is electrically connected to the circuit board (4) and the metal tail cover (3); the internal connector (6) includes a fixing tube (62), the ambient temperature sensor (42) is arranged in the fixing tube (62), and a heat-conducting glue is further provided between the fixing tube (62) and the ambient temperature sensor (42); the tail end of the fixing tube (62) is provided with a protrusion (621), and the metal tail cover (3) is provided with a through hole (33) at a corresponding position, and the protrusion (621) is embedded in the through hole (33) and exposed on the surface of the metal tail cover (3) to sense the ambient temperature.

9. The waterproof wireless temperature probe according to claim 8, characterized in that: The protrusion (621) and the metal tail cover (3) are fixed and sealed by welding; a metal ring wall (34) is also provided on the inner side of the metal tail cover (3), and the fixing cylinder (62) is fitted with the inner wall of the metal ring wall (34), or a heat-conducting glue is provided between the fixing cylinder (62) and the metal ring wall (34).

10. The waterproof wireless temperature probe according to claim 1, characterized in that: The tail portion of the metal tail cover (3) is provided with a brim-shaped protrusion (32) for preventing rolling.

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