Sensor replaceable temperature and humidity meter

Abstract

The utility model relates to a kind of temperature and humidity meter of replaceable sensor, including sensor component, instrument main body and the switching component for receiving sensor component sensing signal;Instrument main body top end detachably is provided with probe seat, the mounting sleeve is installed in the probe seat top end, the switching component is installed in mounting sleeve inside;Switching component includes circuit board fixed seat and the switching circuit board of detachable sleeve in the inside of circuit board fixed seat, switching circuit board and the main circuit board of instrument main body are electrically connected by soft cable;Circuit board fixed seat is cylindrical structure, limit slot is set in circuit board fixed seat top, sensor component passes through limit slot and is detachably connected with switching circuit board.The utility model sets up sensor as independent module, connect to instrument by switching mode, so that sensor component can be replaced at will, avoid complicated whole machine replacement.

Description

Technical Field

[0001] This utility model relates to a temperature and humidity meter with a replaceable sensor, belonging to the technical field of instrument testing equipment. Background Technology

[0002] Temperature and humidity meters are widely used in measurement, industry, agriculture and other fields. However, long-term exposure of the sensor probe to complex or even harsh environments can cause the whole machine to malfunction, which poses a significant challenge to the sustainable operation of the instrument.

[0003] To avoid damage to the sensor, most temperature and humidity meters use a complete integrated structure, integrating the temperature and humidity sensor as a key component into the internal circuitry. It is usually directly soldered onto the main circuit board inside the instrument or rigidly connected to the main circuit board.

[0004] For users, replacing sensors and performing self-repairs has become extremely difficult. It not only requires professional electronic repair knowledge and tools for tedious disassembly of the entire machine, but may also damage other components or compromise the instrument's seal during operation. Therefore, improvements are urgently needed. Utility Model Content

[0005] In order to overcome the shortcomings of existing temperature and humidity meters, such as the inability to repair damaged sensors, this utility model designs a temperature and humidity meter with a replaceable sensor, which is convenient to replace and avoids the cumbersome disassembly of the whole machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A temperature and humidity meter with replaceable sensors includes a sensor assembly, an instrument body, and an adapter assembly for receiving sensing signals from the sensor assembly. A probe holder is detachably mounted on the top of the instrument body, and an mounting sleeve is installed on the top of the probe holder. The adapter assembly is installed inside the mounting sleeve. The adapter assembly includes a circuit board mounting base and an adapter circuit board detachably mounted inside the circuit board mounting base. The adapter circuit board and the main circuit board of the instrument body are electrically connected via a flexible flat cable. The circuit board mounting base has a cylindrical structure, and a limiting groove is formed on the top of the circuit board mounting base, through which the sensor assembly is detachably connected to the adapter circuit board.

[0007] Furthermore, the sensor assembly includes a sensor circuit board, with a temperature and humidity sensor mounted on the top of the sensor circuit board and pin headers mounted on the bottom of the sensor circuit board, which are detachably connected to the adapter circuit board.

[0008] Furthermore, the inner wall of the mounting sleeve is provided with a positioning protrusion, and the side of the adapter circuit board is provided with a positioning groove that engages with the positioning protrusion.

[0009] Furthermore, the bottom edge of the circuit board mounting base is provided with a directional hook, and the side of the adapter circuit board is provided with a hook directional hole. After the directional hook passes through the hook directional hole, it engages with the flange on the inner wall of the mounting sleeve.

[0010] Furthermore, the adapter circuit board is connected to a header and an FPC connector, and a flexible flat cable is fixedly connected to the bottom of the FPC connector. The header and the header pins are detachably plugged in.

[0011] Furthermore, the top of the mounting sleeve is threadedly connected to a probe cover and a waterproof and breathable cover fixedly fitted inside the probe cover, the waterproof and breathable cover being fitted outside the sensor assembly.

[0012] Compared with the prior art, this utility model has the following features and beneficial effects: This invention sets the sensor as an independent module and connects it to the instrument via an adapter, allowing the sensor component to be easily replaced. This avoids the potential damage to sealing and other components that may occur during the cumbersome process of replacing and disassembling the entire instrument. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the probe cover assembly of this utility model on the mounting sleeve; Figure 3 This is an exploded view of the components of the probe part of this utility model; Figure 4 This is a schematic diagram of the circuit board mounting bracket structure of this utility model; Figure 5 This is a schematic diagram of the directional hook structure of this utility model; Figure 6 This is a schematic diagram of the sensor assembly structure of this utility model; Figure 7 This is a schematic diagram of the mounting sleeve and probe seat structure of this utility model; Figure 8 This is a schematic diagram of the adapter circuit board structure of this utility model; Figure 9 This is a schematic diagram of the adapter component structure of this utility model; Figure 10 This is a schematic diagram of the structure of the adapter circuit board of this utility model inside the mounting sleeve; Figure 11 This is a schematic diagram of the circuit board fixing base of this utility model inside the mounting sleeve; Figure 12 This is a top view of the adapter circuit board of this utility model installed inside the mounting sleeve; Figure 13 This is a schematic diagram of the structure inside the mounting sleeve of the sensor circuit board setting device of this utility model; Figure 14 A schematic diagram of the structure of this utility model's waterproof and breathable cover installed inside the probe cover; Figure 15 This is a cross-sectional schematic diagram of the assembled components of this utility model.

[0014] The attached diagrams are labeled as follows: 1. Probe base; 11. Positioning protrusion; 12. Internal thread; 2. Adapter circuit board; 21. Positioning groove; 22. Hook orientation hole; 23. Pin header; 24. FPC connector; 25. Flexible ribbon cable; 3. Circuit board mounting base; 31. Limiting groove; 32. Orientation hook; 4. Sensor circuit board; 41. Temperature and humidity sensor; 42. Pin header; 5. Waterproof and breathable cover; 6. Probe cover; 61. External thread; 7. Mounting sleeve; 8. Sensor assembly; 9. Adapter assembly; 10. Instrument body. Detailed Implementation

[0015] The present invention will now be described in more detail with reference to the embodiments.

[0016] like Figures 1 to 15 As shown, the sensor-replaceable temperature and humidity meter of this embodiment includes a sensor assembly 8, an instrument body 10, and an adapter assembly 9 for receiving the sensing signal from the sensor assembly 8; a probe seat 1 is detachably provided at the top of the instrument body 10, and an installation sleeve 7 is installed at the top of the probe seat 1, with the adapter assembly 9 installed inside the installation sleeve 7; the adapter assembly 9 includes a circuit board fixing seat 3 and an adapter circuit board 2 detachably fitted inside the circuit board fixing seat 3, and the adapter circuit board 2 and the main circuit board of the instrument body 10 are electrically connected via a flexible flat cable 25; the circuit board fixing seat 3 is a cylindrical structure, and a limiting groove 31 is provided at the top of the circuit board fixing seat 3, through which the sensor assembly 8 is detachably connected to the adapter circuit board 2.

[0017] The sensor assembly 8 includes a sensor circuit board 4, a temperature and humidity sensor 41 is provided on the top of the sensor circuit board 4, and a pin header 42 is provided on the bottom of the sensor circuit board 4. The pin header 42 is detachably plugged into the adapter circuit board 2.

[0018] The inner wall of the mounting sleeve 7 is provided with a positioning protrusion 11, and the side of the adapter circuit board 2 is provided with a positioning groove 21 that engages with the positioning protrusion 11.

[0019] The bottom edge of the circuit board mounting base 3 is provided with a directional hook 32, and the side of the adapter circuit board 2 is provided with a hook directional hole 22. After the directional hook 32 passes through the hook directional hole 22, it engages with the flange on the inner wall of the mounting sleeve 7.

[0020] The adapter circuit board 2 is connected to the header 23 and the FPC connector 24. The bottom of the FPC connector 24 is fixedly connected to the flexible flat cable 25. The header 23 and the header pin 42 can be detachably plugged in.

[0021] Data from the temperature and humidity sensor 41 is transmitted to the main circuit board of the instrument via copper foil, pin header 42, header 23, FPC connector 24 and flexible flat cable 25 on the circuit board.

[0022] The top of the mounting sleeve 7 is threadedly connected to the probe cover 6 and the waterproof and breathable cover 5, which is fixedly fitted inside the probe cover 6. The waterproof and breathable cover 5 is fitted outside the sensor assembly 8.

[0023] The inner wall of the mounting sleeve 7 is provided with an internal thread 12, and the probe cover 6 is provided with an external thread 61, which mates with the internal thread 12 of the mounting sleeve 7.

[0024] The waterproof and breathable cover 5 is a waterproof and breathable cover with sealed holes, which can block water molecules from passing through. The waterproof and breathable cover 5 and the probe cover 6 are fixed together with adhesive.

[0025] The working principle of this utility model is as follows: When the display screen shows abnormalities such as being unable to read, not updating the reading for a long time, or the reading exceeding the reasonable range, it is determined that the temperature and humidity sensor 41 is damaged. At this time, the repair and replacement work can be completed by unscrewing the probe cover 6, removing the damaged sensor circuit board 4, replacing it with a new sensor circuit board 4, and screwing the probe cover 6 back in.

[0026] During normal measurement, the probe cover 6 should always be kept tightly screwed to the probe seat 1. The waterproof and breathable cover 5 inside the probe cover 6 blocks liquid water and contaminants while allowing air molecules to pass through, thereby ensuring that the temperature and humidity sensor 41 can perform accurate measurements under protected conditions.

[0027] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A temperature and humidity meter with a replaceable sensor, characterized in that: It includes a sensor assembly (8), an instrument body (10), and a transducer assembly (9) for receiving the sensing signals from the sensor assembly (8). The top of the instrument body (10) is detachably provided with a probe seat (1), and the top of the probe seat (1) is provided with an installation sleeve (7), and the adapter assembly (9) is installed inside the installation sleeve (7). The adapter assembly (9) includes a circuit board mounting base (3) and an adapter circuit board (2) that is detachably fitted inside the circuit board mounting base (3). The adapter circuit board (2) and the main circuit board of the instrument body (10) are electrically connected by a flexible flat cable (25). The circuit board mounting base (3) is a cylindrical structure. A limiting groove (31) is opened on the top of the circuit board mounting base (3). The sensor assembly (8) passes through the limiting groove (31) and is detachably connected to the adapter circuit board (2).

2. A temperature and humidity meter with a replaceable sensor according to claim 1, characterized in that: The sensor assembly (8) includes a sensor circuit board (4), a temperature and humidity sensor (41) is provided on the top of the sensor circuit board (4), and a pin header (42) is provided on the bottom of the sensor circuit board (4). The pin header (42) is detachably plugged into the adapter circuit board (2).

3. A temperature and humidity meter with a replaceable sensor according to claim 1, characterized in that: The inner wall of the mounting sleeve (7) is provided with a positioning protrusion (11), and the side of the adapter circuit board (2) is provided with a positioning groove (21) that engages with the positioning protrusion (11).

4. A temperature and humidity meter with a replaceable sensor according to claim 3, characterized in that: The bottom edge of the circuit board mounting base (3) is provided with a directional hook (32), and the side of the adapter circuit board (2) is provided with a hook directional hole (22). The directional hook (32) passes through the hook directional hole (22) and engages with the flange on the inner wall of the mounting sleeve (7).

5. A temperature and humidity meter with a replaceable sensor according to claim 2, characterized in that: The adapter circuit board (2) is connected to a header (23) and an FPC connector (24). A flexible flat cable (25) is fixedly connected to the bottom of the FPC connector (24). The header (23) and the header (42) are detachably plugged in.

6. A temperature and humidity meter with a replaceable sensor according to claim 1, characterized in that: The top of the mounting sleeve (7) is threadedly connected to a probe cover (6) and a waterproof and breathable cover (5) fixedly fitted inside the probe cover (6), the waterproof and breathable cover (5) being fitted outside the sensor assembly (8).

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