Wireless temperature probe

Abstract

The utility model provides a wireless temperature probe. In the state that the first end portion of the wireless temperature probe is inserted into a to-be-measured target such as food, the first temperature sensor can sense the temperature of the to-be-measured target, and then temperature parameters are transmitted to the circuit board assembly to be processed and then transmitted through the antenna. In this way, the temperature of the target object to be measured can be monitored in real time and fed back automatically. In addition, the branch part of the antenna of the wireless temperature probe is formed to extend from the cylindrical body part to the radial outer side, so that the axial length occupied by the antenna can be greatly reduced. Moreover, the structure formed by the antenna is beneficial to stabilizing the handheld wireless temperature probe, and is convenient to use.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless temperature sensing, and in particular to a wireless temperature probe. Background Art

[0002] Real-time monitoring of food temperature during the cooking process is conducive to achieving better cooking results, and sometimes it can also avoid possible cooking risks by monitoring food temperature. However, traditional temperature probes need to be monitored and recorded manually, which brings considerable inconvenience to the operation process.

[0003] To this end, technicians have developed a device that can monitor, process, record and transmit food temperature in real time using automatic signal processing and wireless transmission technology. For example, in a Chinese invention patent application with publication number "CN 116601470A" and invention name "Food Thermometer and Method of Using It", a solution of using a food thermometer to sense the temperature of food and sending the temperature data to the outside of the food thermometer through an antenna is disclosed.

[0004] However, in the prior art represented by the patent application mentioned above, the food thermometer is formed as a pen as a whole, and the length of the antenna will occupy the axial length of the food thermometer, which causes the food thermometer to be too long and inconvenient to use in certain scenarios. Utility Model Content

[0005] Based on the above-mentioned problems of the prior art, an object of the present disclosure is to provide a wireless temperature probe, which can reduce the axial dimension occupied by the antenna, thereby greatly shortening the overall axial dimension of the wireless temperature probe and facilitating use.

[0006] In order to achieve the above objectives, the present disclosure adopts the following technical solutions.

[0007] The present disclosure provides a wireless temperature probe, comprising:

[0008] A main body formed into a hollow cylindrical shape and having an axial direction and a radial direction;

[0009] A first temperature sensor is received in the main body and is located at a first end of the main body for inserting an object to be measured;

[0010] a first insulator mounted on the second end of the main body;

[0011] An antenna, comprising a cylindrical body portion and a branch portion, wherein the cylindrical body portion is sleeved outside the first insulator and is coaxially arranged with the main body so that the antenna and the main body are separated by the first insulator, and the branch portion extends from the cylindrical body portion toward the radially outer side of the cylindrical body portion;

[0012] a battery installed inside the main body, and

[0013] A circuit board assembly is installed inside the main body, and the first temperature sensor, the antenna and the battery are electrically connected to the circuit board assembly respectively, so that the first temperature sensor can transmit the sensed first temperature parameter of the target object to be measured to the circuit board assembly and then transmit it to the outside of the wireless temperature probe via the antenna.

[0014] In an optional scheme, a second temperature sensor is further included, which is located inside the cylindrical main body or the branch part and is electrically connected to the circuit board assembly, so that the second temperature sensor can transmit the second temperature parameter of the sensed external environment to the circuit board assembly and then transmit it to the outside of the wireless temperature probe via the antenna.

[0015] In another optional solution, it further includes a charging cap and a second insulator, wherein the second insulator is mounted on the cylindrical body portion, and the charging cap is mounted on the second insulator, so that the charging cap and the cylindrical body portion are separated by the second insulator, and the charging cap is electrically connected to the circuit board assembly, and

[0016] The body is made of conductive material.

[0017] In another optional solution, the first insulator is formed with a through hole penetrating along the axial direction, and the antenna, the second temperature sensor and the charging cap are electrically connected to the circuit board assembly via wires passing through the through hole.

[0018] In another optional solution, the antenna is formed with a mounting hole connected to the interior of the cylindrical body portion, and the antenna, the charging cap and the second temperature sensor can be electrically connected to the corresponding wires respectively through the mounting hole.

[0019] In another optional solution, the number of the branch portion is one.

[0020] In another optional solution, there are multiple branches.

[0021] In another optional solution, the plurality of branch portions are arranged at intervals in the circumferential direction of the cylindrical body portion, and / or the plurality of branch portions are arranged at intervals in the axial direction of the cylindrical body portion.

[0022] In another optional solution, the branch portion extends linearly from the cylindrical body portion along a direction forming a predetermined angle with the axial direction; or the branch portion extends from the cylindrical body portion along an arc.

[0023] In another optional scheme, the first insulator includes a first insertion part, a partition part and a second insertion part, the partition part is located between the first insertion part and the second insertion part, the first insertion part is inserted into the main body, and the second insertion part is inserted into the cylindrical body part, and the main body and the cylindrical body part are against the partition part from both sides of the axial direction and are separated by the partition part.

[0024] By adopting the above technical solution, the present disclosure provides a wireless temperature probe, which is used to be inserted into an object to be measured to sense the internal temperature of the object to be measured. The wireless temperature probe includes a main body, a first temperature sensor, a first insulator, an antenna, a battery and a circuit board assembly assembled together. The main body is formed into a hollow cylindrical shape. The first temperature sensor, the battery and the circuit board assembly are all accommodated inside the main body, and the first temperature sensor is located at the first end of the main body for inserting the object to be measured. The first insulator is installed at the second end of the main body. The antenna includes a cylindrical main body and a branch part, the cylindrical main body part is sleeved on the first insulator, and is coaxially arranged with the main body, so that the antenna and the main body are separated by the first insulator, and the branch part extends from the cylindrical main body part toward the radial outside of the cylindrical main body part. Thus, the first temperature sensor can transmit the sensed first temperature parameter of the object to be measured to the circuit board assembly, and the first temperature parameter is processed and transmitted to the outside of the wireless temperature probe via the antenna.

[0025] In this way, when the first end of the wireless temperature probe is inserted into an object to be measured, such as food, the first temperature sensor can sense the temperature of the object to be measured, and then transmit the temperature parameter to the circuit board assembly for processing and then transmit it to the outside via the antenna. In this way, the temperature of the object to be measured can be monitored in real time and feedback can be automatically performed. In addition, the branch portion of the antenna of the wireless temperature probe is formed to extend radially outward from the cylindrical body portion, thereby greatly reducing the axial length occupied by the antenna compared to the antenna adapted to the same frequency band in the prior art. Moreover, the structure formed by the antenna is conducive to stabilizing the handheld wireless temperature probe and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A FIG. 1 is a perspective schematic diagram showing a wireless temperature probe according to a first embodiment of the present disclosure.

[0027] Figure 1B It shows Figure 1A Schematic diagram of the main view of the wireless temperature probe in .

[0028] Figure 1C It shows Figure 1A Schematic cross-sectional view of the wireless temperature probe in FIG.

[0029] Figure 1D It shows Figure 1AAn enlarged cross-sectional schematic diagram of the local structure of the wireless temperature probe.

[0030] Figure 2 1 is an enlarged cross-sectional schematic diagram showing a partial structure of a wireless temperature probe according to a second embodiment of the present disclosure.

[0031] Description of Reference Numerals

[0032] 1—Subject;

[0033] 2—first temperature sensor;

[0034] 3—first insulator; 3h—through hole; 31—first insertion portion; 32—partition portion; 33—second insertion portion;

[0035] 4—antenna; 4h—mounting hole; 41—cylindrical body; 42—branch portion; 421—first antenna segment; 422—second antenna segment;

[0036] 5—antenna insulator;

[0037] 6—Connectors;

[0038] 7—second temperature sensor;

[0039] 8—Circuit board assembly;

[0040] 9—Battery;

[0041] 10—Charging cap;

[0042] 11—second insulator;

[0043] A—axial; R—radial. DETAILED DESCRIPTION

[0044] The following describes the embodiments of the present disclosure with reference to the accompanying drawings. For ease of understanding, the elements shown in the drawings may include elements whose sizes and scales are different from the actual sizes and scales.

[0045] In the present disclosure, unless otherwise specified, the axial direction, radial direction and circumferential direction refer to the axial direction, radial direction and circumferential direction of the cylindrical body of the wireless temperature probe, respectively. The above directions are only used to facilitate the description of the structure of the wireless temperature probe of the present disclosure, and are not used to limit the structure and use state of the wireless temperature probe of the present disclosure.

[0046] The following first describes the wireless temperature probe according to the first embodiment of the present disclosure in conjunction with the accompanying drawings.

[0047] The wireless temperature probe according to the first embodiment of the present disclosure is used to be inserted into a target object to be measured, such as food, to sense the internal temperature of the target object to be measured, and the temperature parameters can be transmitted to the outside of the wireless temperature probe after being processed. Figures 1A to 1D As shown, the wireless temperature probe according to the first embodiment of the present disclosure includes a main body 1, a first temperature sensor 2, a first insulator 3, an antenna 4, a second temperature sensor 7, a circuit board assembly 8, a battery 9, a charging cap 10 and a second insulator 11 assembled together.

[0048] In this embodiment, if Figures 1A to 1D As shown, the main body 1 is formed into a hollow cylindrical shape extending in a straight line and has an axial direction A, a radial direction R and a circumferential direction. The first end of the main body 1 is formed with a closed needle-like structure converging toward the free end, which is conducive to the first end of the main body 1 being able to be inserted into a target object to be measured, such as food. The second end of the main body 1 is formed into an open structure for the first insulator 3 to be inserted and installed in the main body 1. In some embodiments, the main body 1 is made of a conductive material such as metal. In this way, on the one hand, the structural strength of the main body 1 can be ensured; on the other hand, the charging cap 10 and the main body 1 are respectively connected to the positive and negative poles of the external power supply, thereby enabling the battery 9 of the wireless temperature probe to be charged.

[0049] In this embodiment, if Figure 1C As shown, the first temperature sensor 2 is housed inside the main body 1 and is located at the first end of the main body 1 for inserting the target object to be measured, specifically, it can be very close to the tip of the needle-shaped structure of the first end. The first temperature sensor 2 can be electrically connected to the circuit board assembly 8 through a wire. In this way, the first temperature parameter sensed by the first temperature sensor 2 can be transmitted to the circuit board assembly 8 for processing. The type of the first temperature sensor 2 can be selected as needed, for example, it can be a contact temperature sensor such as a thermistor (such as a commonly used negative temperature coefficient thermistor), a thermocouple, a digital temperature sensor, an analog temperature sensor, etc.

[0050] In this embodiment, the first insulator 3 can be made of high temperature resistant insulating materials such as zirconium oxide ceramics. Figures 1A to 1DAs shown, the first insulator 3 is installed at the second end of the main body 1. Specifically, the first insulator 3 has a cylindrical shape extending linearly as a whole, and the first insulator 3 includes a first insertion portion 31, a partition portion 32, and a second insertion portion 33 that are coaxially arranged and divided in the axial direction A. The partition portion 32 is located between the first insertion portion 31 and the second insertion portion 33, and the outer diameter of the first insertion portion 31 and the outer diameter of the second insertion portion 33 are both smaller than the outer diameter of the partition portion 32, thereby forming two step structures formed by the partition portion 32 and the first insertion portion 31 and the second insertion portion 33 on the outer peripheral surface of the first insulator 3. Further, the first insertion portion 31 is coaxially inserted into the main body 1 and fixedly installed with the main body 1 by interference fit, and the second insertion portion 33 is coaxially inserted into the cylindrical body portion 41 of the antenna 4 and fixedly installed with the cylindrical body portion 41 by interference fit. Thus, the cylindrical main body portion 41 of the main body 1 and the antenna 4 abuts against the partition portion 32 from both axial sides and is separated by the partition portion 32, so that the first insulator 3 can not only achieve insulation between the main body 1 and the antenna 4 and provide support for the main body 1 and the antenna 4, but also greatly reduce the adverse effects of the external ambient temperature on the components inside the main body 1.

[0051] Furthermore, if Figure 1C As shown, the first insulator 3 is formed with a Figure 1C The left side end in the middle) passes through along the axial direction A to the other axial side end ( Figure 1C The antenna 4, the second temperature sensor 7 and the charging cap 10 are electrically connected to the circuit board assembly 8 via wires passing through the through hole 3h.

[0052] In this embodiment, the antenna 4 may be made of a conductive material such as metal. Figures 1A to 1D As shown, the antenna 4 includes a cylindrical body portion 41 and a branch portion 42 fixed together, the cylindrical body portion 41 is sleeved on the second insertion portion 33 of the first insulator 3 from the radial outside, and is coaxially arranged with the main body 1, so that the antenna 4 and the main body 1 are separated by the first insulator 3. The branch portion 42 extends from the cylindrical body portion 41 toward the radial outside of the cylindrical body portion 41, and the branch portion 42 extends from the cylindrical body portion 41 along the arc, that is, the central axis of the branch portion 42 extends along the arc. Since the branch portion 42 of the antenna 4 of the wireless temperature probe is formed to extend from the cylindrical body portion 41 toward the radial outside, the axial length occupied by the antenna 4 can be greatly reduced compared with the antenna 4 adapted to the same frequency band in the prior art. Moreover, the structure formed by the antenna 4 is conducive to the user to stably hold the wireless temperature probe.

[0053] Furthermore, if Figure 1C and Figure 1DAs shown, the antenna 4 is formed with a mounting hole 4h penetrating along the radial direction R at the cylindrical body portion 41, and the antenna 4, the charging cap 10 and the second temperature sensor 7 can be electrically connected to the corresponding wires through the mounting hole 4h. In this embodiment, the branch portion 42 can be inserted and mounted to the flange formed at the mounting hole 4h of the cylindrical body portion 41, so that the branch portion 42 is fixed to the cylindrical body portion 41.

[0054] In this embodiment, if Figure 1C and Figure 1D As shown, the second temperature sensor 7 is located inside the cylindrical body portion 41 of the antenna 4. The second temperature sensor 7 and the circuit board assembly 8 are arranged across the first insulator 3, and the second temperature sensor 7 is electrically connected to the circuit board assembly 8 via a wire passing through the through hole 3h of the first insulator 3. Therefore, when the first end of the main body 1 is inserted into the target object to be measured, the cylindrical body portion 41 of the antenna 4 and the second temperature sensor 7 are actually located outside the target object to be measured, so that the second temperature sensor 7 can sense the temperature of the external environment, and transmit the sensed second temperature parameter of the external environment to the circuit board assembly 8, and the second temperature parameter is processed and transmitted to the outside of the wireless temperature probe via the antenna 4. Of course, the second temperature sensor 7 can also be located inside the branch portion 42 of the antenna 4, and being set inside the branch portion 42 will not affect the second temperature parameter of the external environment sensed by the second temperature sensor 7.

[0055] In order to enable the wireless temperature probe to be used independently for a period of time in food processing equipment such as ovens and baking ovens, a rechargeable battery 9 can be provided in the wireless temperature probe, and the battery 9 in the wireless temperature probe can be charged by a dedicated external power supply before use. Figures 1A to 1D As shown, the second insulator 11 is inserted and installed in the cylindrical body part 41, and the second insulator 11 and the cylindrical body part 41 are interference fit to achieve mutual fixation. In addition, the charging cap 10 is installed on the second insulator 11, so that the charging cap 10 and the cylindrical body part 41 are separated by the second insulator 11, and the charging cap 10 is also electrically connected to the circuit board assembly 8 via a wire passing through the through hole 3h of the first insulator 3. In this way, the charging cap 10 and the main body 1 can be connected to the positive and negative poles of the external power supply respectively, thereby enabling the battery 9 of the wireless temperature probe to be charged.

[0056] In this embodiment, if Figure 1CAs shown, the circuit board assembly 8 is installed inside the main body 1, and the circuit board assembly 8 can be fixed relative to the main body 1. The circuit board assembly 8 includes a rigid or flexible circuit board and electronic devices such as chips, capacitors, inductors and resistors arranged on the circuit board to realize functions such as sending and receiving data, data processing, storage, and control. The first temperature sensor 2, the antenna 4, the second temperature sensor 7, the charging cap 10 and the battery 9 are electrically connected to the circuit board assembly 8 via different wires. The first temperature sensor 2 and the second temperature sensor 7 can transmit the sensed first temperature parameter of the target object to be measured and the second temperature parameter of the external environment to the circuit board assembly 8 respectively, and the first temperature parameter and the second temperature parameter are processed and transmitted to the outside of the wireless temperature probe via the antenna 4. During the charging process, the charging current enters the circuit board assembly 8 via the wires or wires between the charging cap 10 and the circuit board assembly 8, and the charging current is processed by the circuit board assembly 8. Constant voltage processing, constant current processing and other processing processes are performed, and then the battery 9 is charged via the wires or wires between the circuit board assembly 8 and the battery 9.

[0057] In this embodiment, if Figure 1C As shown, the battery 9 is installed inside the main body 1, and the battery 9 can be fixed relative to the main body 1. The battery 9 is used to provide power to the circuit board assembly 8, and the battery 9 can be charged via the charging cover and the main body 1 to ensure the continuous operation of the wireless temperature probe.

[0058] By adopting the above technical solution, in the above embodiment, the housing of the wireless temperature probe according to the present disclosure is divided into three parts by the first insulator 3 and the second insulator 11, namely the main body 1, the antenna 4 and the charging cap 10. The main body 1 is used to protect the components inside it, and is used to be inserted into the target object to be measured in the working state, and the charging cap 10 and the main body 1 can be respectively contacted with the positive and negative poles of the external power supply, so as to realize the charging of the battery 9 of the wireless temperature probe. The antenna 4 can operate in a predetermined frequency band, and is used to realize the signal interaction between the circuit board assembly 8 and the external components. The axial length occupied by the antenna 4 is small, thereby making the axial length of the entire wireless temperature probe short.

[0059] A wireless temperature probe according to a second embodiment of the present disclosure is described below.

[0060] The structure of the wireless temperature probe according to the second embodiment of the present disclosure is substantially the same as that of the wireless temperature probe according to the first embodiment of the present disclosure, and the differences between the two are mainly described below.

[0061] In this embodiment, if Figure 2As shown, the branch portion 42 of the antenna 4 includes a first antenna segment 421 and a second antenna segment 422 arranged in layers. The first end portion (upper end portion in the figure) of the first antenna segment 421 can be formed together with the cylindrical body portion 41 to be fixed to each other, and the second end portion (lower end portion in the figure) of the first antenna segment 421 is connected to the first end portion (lower end portion in the figure) of the second antenna segment 422 through a connector 6 made of a conductive material to achieve the two antenna segments 421 and 422 being fixedly connected and electrically connected at the same time. In addition, the wireless temperature probe also includes an antenna insulator 5, which is located between the first antenna segment 421 and the second antenna segment 422, so that the first antenna segment 421 and the second antenna segment 422 are arranged in layers with the antenna insulator 5 interposed therebetween. The connector 6 fixes the first antenna segment 421, the second antenna segment 422 and the antenna insulator 5 together, and the first antenna segment 421 and the second antenna segment 422 are electrically connected via the connector 6.

[0062] By adopting the above solution, the branch portion 42 of the antenna 4 is formed into a stacked structure, which can reduce the size of the branch portion 42 as a whole in its main extension direction, thereby making the structure of the antenna 4 more compact. The two antenna segments 421 and 422 can be well insulated except for being connected at a desired position to achieve electrical connection, thereby enabling the antenna 4 to stably adapt to a specific band.

[0063] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present disclosure. Those skilled in the art may make various modifications and changes to the above embodiments under the guidance of the present disclosure without departing from the scope of the present disclosure. The following supplementary explanation is provided for the technical solution of the present disclosure.

[0064] i. In the above embodiment, it is explained that the wireless temperature probe according to the present disclosure includes only one branch portion 42, so that the wireless temperature probe forms a so-called pistol-type structure, that is, a structure in which the branch portion 42 is a gun handle and the other parts are a gun body. Such a structure is convenient for the operator to hold the wireless temperature probe. Moreover, the present disclosure is not limited to this, and can also form a shape with other structures.

[0065] ii. In the above embodiments, it is described that the wireless temperature probe according to the present disclosure includes only one branch portion 42, but the present disclosure is not limited to this. There are multiple branches 42, and these branches 42 are arranged at intervals in the circumferential direction of the cylindrical body portion 41, and / or these branches 42 are arranged at intervals in the axial direction of the cylindrical body portion 41. The use of multiple branches 42 makes it possible to construct an antenna 4 that adapts to different frequency bands, for example, an antenna that adapts to the Bluetooth band and an antenna that adapts to other radio frequency bands can be realized. As a result, the wireless temperature probe according to the present disclosure can form various desired shapes such as a T-shaped structure.

[0066] iii. In the above embodiments, the branch portion 42 can extend along an arc, but the present disclosure is not limited thereto. For example, the branch portion 42 extends linearly from the cylindrical body portion 41 along a direction forming a predetermined angle with the axial direction A, thereby providing a wireless temperature probe with different structures to adapt to different scenarios.

[0067] iv. In the above embodiments, the main body 1 of the wireless temperature probe and the cylindrical body portion 41 of the antenna 4 are formed into a cylindrical shape, but the present disclosure is not limited thereto. In other optional variations, the main body 1 and the cylindrical body portion 41 of the antenna 4 can be formed into a cylindrical shape with an outer contour of a cross section being a polygon (square or triangle or hexagonal). In this case, the radial direction corresponds to the lateral direction of the main body 1 and the cylindrical body portion 41 (the lateral direction is contained in the cross section perpendicular to the axial direction). Moreover, for a cylindrical shape with a polygonal outer contour of the cross section, its side edges parallel to the axial direction can be formed with chamfers.

[0068] v. The wireless temperature probe according to the present disclosure is capable of operating in higher temperature environments (eg, 1000° F.).

Claims

1. A wireless temperature probe, characterized in that: include: A main body formed into a hollow cylindrical shape and having an axial direction and a radial direction; A first temperature sensor is received in the main body and is located at a first end of the main body for inserting an object to be measured; a first insulator mounted on the second end of the main body; An antenna, comprising a cylindrical body portion and a branch portion, wherein the cylindrical body portion is sleeved outside the first insulator and is coaxially arranged with the main body so that the antenna and the main body are separated by the first insulator, and the branch portion extends from the cylindrical body portion toward the radially outer side of the cylindrical body portion; a battery installed inside the main body, and A circuit board assembly is installed inside the main body, and the first temperature sensor, the antenna and the battery are electrically connected to the circuit board assembly respectively, so that the first temperature sensor can transmit the sensed first temperature parameter of the target object to be measured to the circuit board assembly and then transmit it to the outside of the wireless temperature probe via the antenna.

2. The wireless temperature probe according to claim 1, characterized in that: It also includes a second temperature sensor, which is located inside the cylindrical main body or inside the branch part and is electrically connected to the circuit board assembly, so that the second temperature sensor can transmit the second temperature parameter of the sensed external environment to the circuit board assembly and then transmit it to the outside of the wireless temperature probe via the antenna.

3. The wireless temperature probe according to claim 2, characterized in that: The device further comprises a charging cap and a second insulator, wherein the second insulator is mounted on the cylindrical body portion, the charging cap is mounted on the second insulator, so that the charging cap and the cylindrical body portion are separated by the second insulator, and the charging cap is electrically connected to the circuit board assembly, and The body is made of conductive material.

4. The wireless temperature probe according to claim 3, characterized in that: The first insulator is formed with a through hole penetrating along the axial direction, and the antenna, the second temperature sensor and the charging cap are electrically connected to the circuit board assembly via wires passing through the through hole.

5. The wireless temperature probe according to claim 4, characterized in that: The antenna is formed with a mounting hole communicating with the interior of the cylindrical body portion, and the antenna, the charging cap, and the second temperature sensor can be electrically connected to the corresponding lead wires through the mounting hole.

6. The wireless temperature probe according to any one of claims 1 to 5, characterized in that: The number of the branch portion is one.

7. The wireless temperature probe according to any one of claims 1 to 5, characterized in that: The number of the branch parts is plural.

8. The wireless temperature probe according to claim 7, characterized in that: The plurality of branch portions are arranged at intervals in the circumferential direction of the cylindrical body portion, and / or the plurality of branch portions are arranged at intervals in the axial direction of the cylindrical body portion.

9. The wireless temperature probe according to any one of claims 1 to 5, characterized in that: The branch portion extends linearly from the cylindrical body portion in a direction forming a predetermined angle with the axial direction; or The branch portion extends from the cylindrical body portion along an arc.

10. The wireless temperature probe according to any one of claims 1 to 5, characterized in that: The first insulator includes a first insertion portion, a partition portion and a second insertion portion, the partition portion is located between the first insertion portion and the second insertion portion, the first insertion portion is inserted into the main body, and the second insertion portion is inserted into the cylindrical body portion, the main body and the cylindrical body portion abut against the partition portion from both sides of the axial direction and are separated by the partition portion.

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