Patent Application
20240201018
The present application relates to the technical field of temperature measuring device, and particularly to a Bluetooth temperature measuring probe.
With the development of people's living standards, the requirement for food is increasingly increased. The Bluetooth temperature measuring probe is applied more and more widely. The Bluetooth temperature measuring probe can be pierced into the food to directly measure a temperature, so internal temperature data of the food can be checked conveniently by users in real time, thereby assisting in realizing an intelligent cooking.
The current Bluetooth temperature measuring probe generally includes a needle tube, a handle, a temperature sensor, a PCB board, a Bluetooth module, an antenna, and a power-supply module, in which the needle tube is made of metal material and has a good thermal conductivity, and the temperature sensor tests the temperature of the needle tube and transmits temperature signals to an external receiving terminal through the Bluetooth module and the antenna. However, the Bluetooth temperature measuring probe needs to contact high temperature frequently, and the antenna generally adopts a form of FPC, please make reference to China patent application with a publication no. of CN212030751U and a title of “a Four-wire Bluetooth barbecue thermometer” for the detail, a performance of the FPC antenna is easy to be influenced under prolonged high temperature condition, and the FPC antenna has a short service life and needs to be improved.
In order to solve a technical problem that the current Bluetooth temperature measuring probe adopts a FPC antenna, so the antenna has an unstable performance under prolonged high temperature condition and has a short service life, the present application provides a Bluetooth temperature measuring probe.
The Bluetooth temperature measuring probe provided by the present application adopts the following technical solution: the Bluetooth temperature measuring probe includes a needle tube, a handle, a first temperature sensor and a PCB board, in which the first temperature sensor and the PCB board are both provided in the needle tube; and the handle is fixedly connected to a tail end of the needle tube; the Bluetooth temperature measuring probe further includes a ceramic antenna provided inside the needle tube and the handle and having a head end extending into the needle tube and being electrically connected to the PCB board and a tail end extending into the handle to receive and transmit a signal, so as to realize an antenna function.
By adopting the above technical solution, the present application adopts the ceramic antenna to replace the current FPC antenna. The ceramic antenna has an advantage of high temperature resistance, and is able to work under a high temperature condition for a long time, but still ensures a work stability. Further, the ceramic antenna has advantages of high gain and high sensitivity. The ceramic antenna has a head end extending into the needle tube and being electrically connected to the PCB board and a tail end extending into the handle. Moreover, the handle is generally made of materials with poor shielding effect such as ceramic, so as to avoid a great influence on receiving and transmitting signals of the ceramic antenna for realizing the antenna function.
In some embodiments, the Bluetooth temperature measuring probe further includes a shielding tube, and the shielding tube is arranged inside the needle tube and the handle and sleeved on the antenna; and has a head end extending into the needle tube and a tail end extending into the handle; and the tail end of the ceramic antenna extends beyond the shielding tube to receive and transmit a signal, so as to realize the antenna function.
By adopting the above technical solution, the shielding tube plays a role of ground in an antenna system. A length of the antenna part that functions can be changed by adjusting a length of the shielding tube, thereby the performance of the antenna is changed, so that the antenna achieves a high efficiency and a good consistency.
In some embodiments, the shielding tube has a cross-section shape of a circle, an oval or a polygon, and the shielding tube is a stainless steel shielding tube, a copper shielding tube or an aluminum shielding tube.
By adopting the above technical solution, the shapes and materials of the shielding tube are not limited in the present application, provided that it has shielding effect.
In some embodiments, the ceramic antenna includes a ceramic substrate and an antenna metal layer provided on the ceramic substrate.
In some embodiments, the Bluetooth temperature measuring probe further includes an anti-disengagement buckle, in which a groove is formed in the inner wall of the needle tube at the tail end thereof; the anti-disengagement buckle is inserted into the groove so as to be fixedly connected to the needle tube; and the anti-disengagement buckle is sleeved on the shielding tube and fixedly connected to the shielding tube.
By adopting the above technical solution, the shielding tube also serves as a structural member connecting the needle tube to the handle. The anti-disengagement buckle is fixedly connected to the shielding tube at first, and then snapped into the groove of the needle tube, that is, the needle tube is fixed to the shielding tube at a head end thereof.
In some embodiments, the anti-disengagement buckle is fixedly connected to the shielding tube by glue.
In some embodiments, the anti-disengagement buckle includes an annular base and a plurality of elastic cantilevers provided on the annular base; and a bump is protruded out of the elastic cantilevers at a head end thereof; and configured to cooperate with the groove of the needle tube.
By adopting the above technical solution, the elastic cantilevers will be pressed inward and deform elastically when the anti-disengagement buckle is installed on the needle tube. The elastic cantilevers restore the elastic deformation outward to achieve a snap connection between the buckle and the groove when the buckle reaches the groove, thereby the needle tube is fixedly connected to the shielding tube, and the both will not be easily separated from each other.
In some embodiments, the shielding tube has an external thread at a central part thereof; the handle has an internal thread in an inner wall thereof; and the handle is in thread connection with the shielding tube.
By adopting the above technical solution, the handle can be stably connected to the shielding tube.
In some embodiments, the handle is provided at the tail end thereof with a charging metal head; the ceramic antenna is provided with a charging line; the charging line and the antenna metal layer are separately provided on two opposite surfaces of the ceramic substrate; the charging metal head is electrically connected to the charging line on the ceramic antenna; the charging line on the ceramic antenna is also electrically connected to the PCB board; a elastic tab is provided on the PCB board; the needle tube is electrically connected to the PCB board via the elastic tab; and the charging metal head and the needle tube serve as a positive electrode and a negative electrode of a charging circuit, respectively.
By adopting the above technical solution, a power-supply module can be charged.
Further, the charging line and the antenna metal layer of the present application are separately arranged at two opposite surfaces of the ceramic substrate, which takes full advantage of the insulation performance of the ceramic substrate, so that the charging line and the antenna metal layer do not influence each other, and the performance of the antenna is not influenced when charging.
In some embodiments, the Bluetooth temperature measuring probe further includes a second temperature sensor for measuring an environmental temperature and electrically connected to the PCB board; an accommodation hole is formed in the charging metal head at an inner end thereof; and the second temperature sensor is provided in the accommodation hole.
By adopting the above technical solution, the charging metal head is made of metal materials with good heat conduction and good heat dissipation effect, the temperature of which is substantially consistent with an environmental temperature, and the environmental temperature can be measured more accurately.
In summary, the present application can achieve at least one of the following technical effects:
The present application is further described in detail below in combination with the
Referring to
The present application adopts the ceramic antenna 5 to replace the current FPC antenna. The ceramic antenna 5 has an advantage of high temperature resistance, and is able to work under a high temperature condition for a long time, but still ensures a work stability. Further, the ceramic antenna has advantages of high gain and high sensitivity. The ceramic antenna 5 has a head end extending into the needle tube 1 and being electrically connected to the PCB board 4 and a tail end extending into the handle 2. Moreover, the handle 2 is generally made of materials with poor shielding effect such as ceramic, so as to avoid a great influence on receiving and transmitting signals of the ceramic antenna 5 for realizing the antenna function.
Generally, the internal antenna needs to be designed and debugged in combination with the dielectric constants of surrounding materials in a specific environment where the internal antenna is used. Most of the internal antennas need custom design, and have poor commonality and long development period.
Referring to
A cross-section shape of the shielding tube 6 may be various shapes such as a circle, an oval or a polygon, and the shielding tube may be various metal tubes such as a stainless steel shielding tube, a copper shielding tube or an aluminum shielding tube.
Referring to
Referring to
Referring to
A power-supply module 10 is needed to be arranged inside the Bluetooth temperature measuring probe for supplying power to the Bluetooth temperature measuring probe when it works. The power-supply module 10 is electrically connected to the PCB board 4, so the power-supply module 10 needs to be charged.
Referring to
In the traditional technical solution, the antenna is also used as a charging circuit, such that the service life of the antenna is seriously affected, and the performance of the antenna is easily affected as well. The charging line 53 and the antenna metal layer 52 of the present application are separately arranged at two opposite surfaces of the ceramic substrate 51, which takes full advantage of the insulation performance of the ceramic substrate 51, so that the charging line 53 and the antenna metal layer 52 do not influence each other, and the performance and the service life of the antenna are not influenced when charging.
Referring to the
The above are the preferred embodiments of the present application, which are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202211625359.9 | Dec 2022 | CN | national |
This application is a continuation of PCT application serial no. PCT/CN2023/071221, filed on Jan. 9, 2023, which claims the priority and benefit of Chinese patent application no. 202211625359.9, filed on Dec. 16, 2022. The entireties of PCT application serial no. PCT/CN2023/071221 and Chinese patent application no. 202211625359.9 are hereby incorporated by reference herein and made a part of this specification.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN23/71221 | Jan 2023 | WO |
| Child | 18128317 | US |
