A sensor structure

Abstract

The utility model discloses a sensor structure, include: casing have accommodation cavity and detect flow channel, detect component, including PCB board, PCBA board and sensor, the PCB board sets up in the accommodation cavity, one end of PCBA board is connected on the PCB board, and the other end extends to detect flow channel, and the sensor is connected on the PCBA board of detect flow channel, filling body fills the gap between PCBA board and detect flow channel to be covered on PCBA board and be combined with the lateral wall of detect flow channel, the setting of sensor exposes filling body, has the characteristics that the protection effect of electronic component is better, and the structure is stable and reliable, the utility model relates to sensor technical field.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and more specifically to a sensor structure. Background Technology

[0002] In the current sensor technology field, many sensor products face numerous problems that urgently need to be solved. On the one hand, insufficient sealing performance has become a key factor restricting sensor performance and lifespan. Common sealing methods cannot effectively prevent the corrosion of internal electronic components by the medium in the detection channel. For example, in some humidity sensor applications, humid gaseous media enter the sensor through the detection channel, corroding the electronic components on the PCBA board, causing a decline in the performance of the electronic components or even damage. This not only shortens the lifespan of the sensor but also seriously affects the detection accuracy, resulting in deviations in the sensor's output data and failing to meet actual usage requirements. On the other hand, unreasonable structural design also brings a series of drawbacks to the sensor. From the perspective of stability, the traditional structural design makes the sensor susceptible to external vibrations, impacts and other factors during operation, and the connection between components is not strong enough, resulting in poor overall stability of the sensor. Utility Model Content

[0003] To address the shortcomings and defects of existing technologies, a sensor structure that provides better protection for electronic components and is structurally robust and reliable is provided.

[0004] A sensor structure, comprising: The housing has a receiving cavity and a detection flow channel; The detection components include PCB boards, PCBA boards, and sensors. The PCB board is disposed in the accommodating cavity, one end of the PCBA board is electrically connected to the PCB board, and the other end extends to the detection flow channel. The sensor is electrically connected to the PCBA board located in the detection flow channel. The filler fills the gap between the PCBA board and the test channel to cover the PCBA board and bond with the sidewalls of the test channel. The sensor is positioned to expose the filler.

[0005] By adopting the above structure, the sensor structure of this utility model has the following advantages compared with the prior art: The sensor is mounted on the PCBA board, and the PCBA enables electrical connection between the sensor and the PCB. In turn, the PCB establishes electrical connection with external electrical components (such as controllers used to receive sensor data). In actual operation, when the medium flows through the detection channel, the sensor can accurately acquire relevant data of the medium (such as humidity, temperature, etc.) and promptly feed this data back to external electrical components.

[0006] This application provides a filler that fills the gap between the PCBA board and the detection channel, tightly covering the PCBA board. This allows the electronic components on the PCBA board to be in a closed environment, preventing damage caused by factors such as the medium inside the channel. The filler also integrates with the sidewall of the detection channel, forming a support structure between the PCBA board and the sidewall of the detection channel, providing effective support for the PCBA board, avoiding the formation of cantilever beam structures, and greatly improving the stability of the structure. The above improvements make the device more reliable and extend its service life.

[0007] As an improvement of this utility model, the filler includes a first segment and a second segment connected to the tail of the first segment. The first and second segments are integrally formed structures. The first section fills the gap between the PCBA board and the detection channel, and the second section fills the cavity and is combined with the side wall of the cavity.

[0008] As an improvement of this utility model, the front end of the accommodating cavity is provided with a radially inwardly extending boss, and a variable diameter hole is formed on the inner side of the boss. The diameter of the variable diameter orifice is larger than the diameter of the detection channel; The front end of the PCB board is supported on the rear end face of the boss, and the second section fills the gap between the variable diameter hole and the PCBA board and covers the front end face of the PCB board.

[0009] As an improvement of this utility model, the PCB board is positioned on the tail end face of the boss by a fixing component; The fixing component includes a limiting frame that abuts against the tail end face of the PCB, and the limiting frame is provided with a forward-extending pin that passes through the PCB and enters a connecting hole on the housing.

[0010] As an improvement of this utility model, the inner side of the pin is provided with a hole, and the front end of the hole is open. The second section is also provided with a connecting body between the connecting hole and the pin, and inside the hole.

[0011] As an improvement of this utility model, a filter is provided at the inlet of the detection channel. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0013] Figure 2 This is a front view structural diagram of the present invention in cross-section.

[0014] Figure 3 This is a three-dimensional structural diagram of the present invention after the shell has been removed.

[0015] Figure 4 This is a three-dimensional structural diagram of the shell of this utility model.

[0016] The figure shows: 1. Housing; 1.1. Receiving cavity; 1.11. Boss; 1.2. Detection channel; 1.21. Filter; 1.3. Connecting hole; 2. PCB board; 3. PCBA board; 4. Sensor; 5. Filler; 5.1. First section; 5.2. Second section; 5.21. Assembly; 6. Limiting frame; 6.1. Pin; 6.11. Hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Please see Figure 1-4 As shown, A sensor structure, comprising: The housing 1 has a receiving cavity 1.1 and a detection channel 1.2. When the filler 5 is not provided, the tail end of the detection channel 1.2 is connected to the receiving cavity 1.1. After the detection assembly is completed, the filler 5 is filled. The filler 5 can be processed by injection molding or other processes.

[0019] The detection components include PCB board 2, PCBA board 3, and sensor 4. PCB board 2 is disposed in the accommodating cavity 1.1, one end of PCBA board 3 is electrically connected to PCB board 2, and the other end extends to the detection flow channel 1.2. Sensor 4 is electrically connected to PCBA board 3 located in the detection flow channel 1.2. The filler 5 fills the gap between the PCBA board 3 and the detection channel 1.2 to cover the PCBA board 3 and to bond with the sidewall of the detection channel 1.2. Sensor 4 is set to expose filler 5.

[0020] Sensor 4 is mounted on PCBA board. PCBA board 3 is plugged into PCB board 2 to establish electrical connection between them. PCB board 2 is also electrically connected to external electrical components (such as controllers used to receive data from sensor 4). In actual operation, when the medium flows through the detection channel 1.2, the sensor 4 can accurately obtain relevant data of the medium (such as humidity, temperature, etc.) and promptly feed this data back to the external electrical components.

[0021] This application provides a filler 5, which fills the gap between the PCBA board 3 and the detection channel 1.2, tightly covering the PCBA board, so that the electronic components on the PCBA board 3 are in a closed environment and are protected from damage caused by the medium in the channel. The filler 5 is also combined with the sidewall of the detection channel 1.2, which can form a support structure between the PCBA board 3 and the sidewall of the detection channel 1.2, providing effective support for the PCBA board 3, avoiding the formation of a cantilever beam structure, and greatly improving the stability of the structure. The above improvements make the device more reliable and extend its service life.

[0022] As an improvement of this utility model, the filler 5 includes a first segment 5.1 and a second segment 5.2 connected to the tail of the first segment 5.1. Section 5.1 and Section 5.2 are a single, integrally formed structure. The first segment 5.1 fills the gap between the PCBA board 3 and the detection channel 1.2, and the second segment 5.2 fills the cavity 1.1 and is combined with the side wall of the cavity 1.1.

[0023] After the above improvements, the two-section filler 5 has a larger bonding area with the shell 1, thereby obtaining a greater bonding force and effectively preventing the filler 5 from falling out of the preset position, making the structure stable and highly reliable.

[0024] As an improvement of this utility model, the detection channel 1.2 is connected to the front end of the accommodating cavity 1.1; The front end of the accommodating cavity 1.1 is provided with a radially inwardly extending boss 1.11, and a variable diameter hole is formed on the inner side of the boss 1.11. The diameter of the variable diameter hole is larger than the diameter of the detection flow channel 1.2. The front end of PCB board 2 is supported by the rear end face of boss 1.11, which effectively supports PCB board 2 and stabilizes its position. The second section 5.2 fills the gap between the variable diameter hole and the PCBA board 3, and covers the front end face of the PCB board 2.

[0025] The variable diameter hole and the detection channel 1.2 form a stepped hole. The first section 5.1 and the second section 5.2 are also variable diameter structures. Since the diameter of the second section 5.2 is larger than the diameter of the detection channel 1.2, it cannot enter the detection channel 1.2, which can restrict the forward movement of the filler 5 and keep the filler 5 in the preset position.

[0026] The second section 5.2 covers the tail end of PCBA board 3 and the tail end covers the front end face of PCB board 2. This can cover the connection between PCBA board 3 and PCB board 2, so that the connection is in a closed environment, avoiding damage caused by factors such as the medium in the flow channel. It can also further increase the structural strength and further improve the stability of the detection component.

[0027] As an improvement to this utility model PCB board 2 is positioned on the rear end face of boss 1.11 by a fixing component; The fixing component includes a limiting frame 6, which abuts against the tail end face of the PCB, and the limiting frame 6 is provided with a forward-extending pin 6.1, which passes forward through the PCB board 2 and enters the connecting hole 1.3 on the housing 1.

[0028] After the pin 6.1 passes through the PCB board 2 and enters the connecting hole 1.3, the limiting bracket 6 can abut against the tail end face of the PCB board 2, so that the PCB board 2 is stably limited to the tail end face of the boss 1.11. The position of the PCB board 2 is stable, and its front end face abuts against the tail end face of the second segment 5.2, restricting the backward movement of the second segment 5.2. This can further prevent the filler 5 from falling out of the preset position, making the structure stable and the operation reliable.

[0029] As an improvement of this utility model, a hole 6.11 is provided on the inner side of the pin 6.1, and the front end of the hole 6.11 is open; The second section 5.2 also includes a connecting body 5.21 that enters the connection hole 1.3 and the pin 6.1, as well as the hole 6.11.

[0030] The connector 5.21 can be combined with the wall of the connecting hole 1.3, the outer wall of the pin 6.1, and the inner wall of the hole 6.11, thereby improving the stability of the connection between the pin 6.1 and the connecting hole 1.3 and enhancing the sealing performance.

[0031] As an improvement of this utility model, a filter 1.21 is provided at the inlet of the detection channel 1.2. The filter 1.21 has multiple holes for the medium to pass through. When the medium passes through, the filter 1.21 can perform a filtering function, reducing the entry of impurities and making the detection results accurate.

[0032] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A sensor structure, characterized in that, include: The housing (1) has a receiving cavity (1.1) and a detection flow channel (1.2). The detection components include a PCB board (2), a PCBA board (3), and a sensor (4). The PCB board (2) is disposed in the accommodating cavity (1.1), one end of the PCBA board (3) is electrically connected to the PCB board (2), and the other end extends to the detection channel (1.2). The sensor (4) is electrically connected to the PCBA board (3) located in the detection channel (1.2). The filler (5) fills the gap between the PCBA board (3) and the detection channel (1.2) to cover the PCBA board (3) and to bond with the sidewall of the detection channel (1.2). The sensor (4) is positioned to expose the filler (5).

2. The sensor structure according to claim 1, characterized in that: The filler (5) includes a first segment (5.1) and a second segment (5.2) connected to the tail of the first segment (5.1). The first segment (5.1) and the second segment (5.2) are integrally formed structures. The first segment (5.1) fills the gap between the PCBA board (3) and the detection channel (1.2), and the second segment (5.2) fills the cavity (1.1) and is combined with the sidewall of the cavity (1.1).

3. The sensor structure according to claim 2, characterized in that: The front end of the accommodating cavity (1.1) is provided with a radially inwardly extending boss (1.11), and a variable diameter hole is formed on the inner side of the boss (1.11). The diameter of the variable diameter orifice is larger than the diameter of the detection channel (1.2); The front end of the PCB board (2) is supported on the rear end face of the boss (1.11), and the second section (5.2) fills the gap between the variable diameter hole and the PCBA board (3) and covers the front end face of the PCB board (2).

4. The sensor structure according to claim 3, characterized in that: The PCB board (2) is positioned on the tail end face of the boss (1.11) by a fixing component; The fixing component includes a limiting frame (6), which abuts against the tail end face of the PCB, and the limiting frame (6) is provided with a forward-extending pin (6.1), which passes forward through the PCB board (2) and enters the connecting hole (1.3) on the housing (1).

5. A sensor structure according to claim 4, characterized in that: The inner side of the pin (6.1) is provided with a hole (6.11), and the front end of the hole (6.11) is open. The second section (5.2) is also provided with a connector (5.21) between the connecting hole (1.3) and the pin (6.1) and inside the hole (6.11).

6. A sensor structure according to claim 1, characterized in that: The inlet of the detection channel (1.2) is provided with a filter (1.21).

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