Sensor with anti-misplacement structure

Abstract

The utility model discloses a sensor with mistaken position prevention structure, include: casing have accommodation cavity, and detect flow channel, detection subassembly, including setting in the PCB board of accommodation cavity, and set up detect flow channel in, and with the sensor unit of PCB board electricity is connected, PCB board is connected with external electric part electricity, PCB board is provided with alignment hole, holder, set up in accommodation cavity and with the rear end surface of PCB board is opposite, the holder is provided with the positioning pin, the positioning pin passes through alignment hole and enters the connecting hole on the wall surface of accommodation cavity, to preposition PCB board, and this application sets up mistaken position prevention structure, makes the part mounting position accurate, facilitates the assembly of subsequent parts, 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 with an anti-misalignment structure. Background Technology

[0002] During sensor installation and use, ensuring accurate installation of the detection components is crucial for sensor performance and reliability. Traditional sensor structures are prone to misalignment during installation, especially on the PCB board. Misalignment can prevent subsequent electrical components (e.g., conductive pins, terminals) from accurately identifying their positions, potentially leading to assembly errors. This necessitates verifying the accuracy of the installation position, making the installation process cumbersome and error-prone. Utility Model Content

[0003] To address the shortcomings and defects of existing technologies, a sensor with an anti-misalignment structure is provided, which ensures accurate installation of parts and facilitates subsequent component assembly.

[0004] A sensor with an anti-misalignment structure includes: The housing has a receiving cavity and a detection flow channel; The detection assembly includes a PCB board disposed within the accommodating cavity and a sensor unit disposed within the detection flow channel and electrically connected to the PCB board. The PCB board is electrically connected to external electrical components. The PCB board is provided with alignment holes; The retainer is located within the receiving cavity and abuts against the rear end face of the PCB board. The retainer is provided with a positioning pin, which passes through the alignment hole and enters the connecting hole on the wall of the receiving cavity to pre-position the PCB board.

[0005] With the above structure, the sensor of this utility model with an anti-misalignment structure has the following advantages compared with the prior art: The sensor unit includes a PCBA board and sensors (such as temperature sensors and humidity sensors) electrically connected to the PCBA board. The PCBA is electrically connected to the PCB, and the PCB is electrically connected to 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 temperature and humidity) and promptly feed this data back to external electrical components.

[0006] The retainer provided in this application uses positioning pins that pass sequentially through alignment holes on the PCB board and connection holes on the cavity wall to achieve pre-positioning of the PCB board, keeping it in a preset assembly position. This effectively prevents misalignment of the PCB board during installation and subsequent component connection, improving the accuracy and reliability of installation.

[0007] As an improvement of this utility model, the connecting hole is located at the front end of the accommodating cavity. The positioning pin is located on the front end face of the cage and extends forward, passing through the alignment hole and entering the connection hole.

[0008] As an improvement of this utility model, the alignment hole is a "U"-shaped slot set on the PCB board. The spacing between the grooves of the "U"-shaped opening is adapted to the diameter of the positioning pin.

[0009] As an improvement of this utility model, the PCB board is provided with conductive pins extending to the rear end; The retainer is provided with a through hole for the conductive pin to pass through.

[0010] As an improvement of this utility model, the rear end of the retainer is provided with a rearwardly extending portion corresponding to the position of the through hole, and the through hole passes through the extension portion.

[0011] As an improvement of this utility model, the retainer and the PCB board are both circular thin sheet structures, and the peripheral surfaces of the retainer and the PCB board are configured to be in clearance fit or contact with the peripheral surface of the receiving cavity.

[0012] As an improvement of this utility model, the front end of the accommodating cavity is provided with a radially inwardly extending flange, and the front end face of the PCB board abuts against the tail end face of the flange.

[0013] As an improvement of this utility model, the detection channel is located on the housing at the front end of the accommodating cavity, and the detection channel is connected to the accommodating cavity. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the detection component and the cage of this utility model.

[0016] Figure 3 This is a schematic diagram of the detection component of this utility model.

[0017] Figure 4 This is a structural schematic diagram of the cage of this utility model.

[0018] The figure shows: 1. Housing; 1.1. Receiving cavity; 1.11. Connecting hole; 1.12. Flange; 1.2. Detection channel; 2. PCB board; 3. Sensor unit; 3.1. PCBA board; 3.2. Sensor; 4. Alignment hole; 5. Cage; 5.1. Positioning pin; 5.2. Through hole; 5.21. Extension; 6. Conductive pin; 7. Foolproof structure. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Please see Figure 1-4 As shown, A sensor 3.2 with an anti-misalignment structure includes: The housing 1 has a receiving cavity 1.1 and a detection flow channel 1.2; The detection assembly includes a PCB board 2 disposed within the accommodating cavity 1.1 and a sensor unit 3 disposed within the detection flow channel 1.2 and electrically connected to the PCB board 2. PCB board 2 is electrically connected to external electrical components. PCB board 2 is provided with alignment holes 4; The retainer 5 is disposed within the receiving cavity 1.1 and abuts against the rear end face of the PCB board 2. The retainer 5 is provided with a positioning pin 5.1, which passes through the alignment hole 4 and enters the connecting hole 1.11 on the wall of the receiving cavity 1.1 to pre-position the PCB board 2.

[0021] The sensor unit 3 includes a PCBA board 3.1 and a sensor 3.2 electrically connected to the PCBA board 3.1 (the sensor 3.2 can be a temperature sensor 3.2, a humidity sensor 3.2, etc.). The PCBA is electrically connected to the PCB, and the PCB is electrically connected to external electrical components (such as controllers used to receive data from sensor 3.2). In actual operation, when the medium flows through the detection channel 1.2, the sensor 3.2 can accurately acquire relevant data of the medium (such as temperature, humidity, etc.) and promptly feed this data back to the external electrical components.

[0022] The retainer 5 provided in this application passes through the alignment hole 4 on the PCB board and the connection hole 1.11 on the wall of the accommodating cavity 1.1 in sequence with the positioning pin 5.1, so as to realize the pre-positioning operation of the PCB board and keep it in the preset assembly position. This can effectively avoid misalignment of the PCB board during installation and subsequent connection of components, and improve the accuracy and reliability of installation.

[0023] As an improvement of this utility model, the connecting hole 1.11 is located at the front end of the accommodating cavity 1.1. The positioning pin 5.1 is provided on the front end face of the retainer 5 and extends forward. The positioning pin 5.1 passes forward through the alignment hole 4 and enters the connection hole 1.11.

[0024] The positioning pin 5.1 is set at the front end of the retainer 5. When the PCB board 2 is installed into the receiving cavity 1.1, the retainer 5 is then assembled. After the positioning pin 5.1 passes forward through the alignment hole 4 and enters the connection hole 1.11, the positioning of the PCB board 2 can be completed. It has the characteristics of reasonable, simple and compact structure layout.

[0025] As an improvement of this utility model, the alignment hole 4 is a "U"-shaped slot provided on the PCB board 2. The groove spacing of the "U" shaped slot is adapted to the diameter of the locating pin 5.1.

[0026] Compared with the conventional hole-shaped alignment structure, the "U" shaped groove can more easily align with the connecting hole 1.11 to allow the positioning pin 5.1 to enter, and has better fault tolerance and guidance.

[0027] Meanwhile, the slot spacing is compatible with the 5.1 diameter of the positioning pin, which can ensure the positioning accuracy and effectively prevent the PCB board 2 from deflecting.

[0028] As an improvement of this utility model, the PCB board 2 is provided with conductive pins 6 extending to the rear end. The retainer 5 is provided with a through hole 5.2 for the conductive pin 6 to pass through.

[0029] After the retainer 5 is installed, the conductive pins 6 on the PCB board 2 are inserted into the through holes 5.2 of the retainer 5. The through hole 5.2 is designed to be in clearance fit or contact with the circumferential surface of the conductive pins 6, which can effectively support and position the conductive pins 6, facilitating subsequent component alignment and connection.

[0030] As an improvement of this utility model, the rear end of the retainer 5 is provided with a rearwardly extending part 5.21 corresponding to the position of the through hole 5.2, and the through hole 5.2 passes through the extension part 5.21.

[0031] The through hole 5.2 is extended by the extension 5.21, which increases the support area of ​​the inner wall of the through hole 5.2 on the circumference of the conductive component, improves the support effect, and further avoids the conductive pin 6 from tilting. The conductive pin 6 is in a stable position and has the characteristics of reliable operation.

[0032] As an improvement of this utility model, the retainer 5 and the PCB board 2 are both circular thin sheet structures, and the peripheral surfaces of the retainer 5 and the PCB board 2 are configured to be in clearance fit or contact with the peripheral surface of the accommodating cavity 1.1.

[0033] Preferably, the accommodating cavity 1.1 is a cylindrical cavity. The peripheral surfaces of the PCB board 2 and the retainer 5 are respectively configured to have a clearance fit or contact with the inner wall surface of the accommodating cavity 1.1. The inner wall surface of the accommodating cavity 1.1 provides support for the peripheral surfaces of the PCB board 2 and the retainer 5. After assembly, the structures support each other, increasing the stability of the connection between the components. Furthermore, both the PCB board 2 and the cage 5 are sheet-like structures, stacked one on top of the other, making the structure more compact and facilitating the miniaturization of the device.

[0034] As an improvement of this utility model, the front end of the accommodating cavity 1.1 is provided with a radially inwardly extending flange 1.12, and the front end face of the PCB board 2 abuts against the rear end face of the flange 1.12.

[0035] After the retainer 5 is installed, a fastener is set behind the retainer 5. The fastener abuts against the rear end face of the retainer 5, and the PCB board 2 is abutted against the flange 1.12. The PCB board 2 can be fixed without the use of screws or other fasteners, so that the position of the PCB board 2 is stable. The detection channel 1.2 is located on the housing 1 at the front end of the accommodating cavity 1.1, and the detection channel 1.2 is connected to the accommodating cavity 1.1. It has the characteristics of reasonable and compact structure layout, which is conducive to the miniaturization of the device.

[0036] Assembly process of this device: Sensor unit 3 includes PCBA board 3.1 and sensor 3.2 electrically connected to the front of PCBA board 3.1. The tail end of PCBA board 3.1 is inserted into the middle position of PCB board 2. The assembled PCB board 2 and PCBA board 3.1 are inserted into the rear opening of the accommodating cavity 1.1 and moved forward until the PCBA board 3.1 enters the detection flow channel 1.2, with the front end face of the PCB board 2 abutting against the end face of the flange 1.12. Furthermore, the retainer 5 is inserted into the rear opening of the accommodating cavity 1.1, and the positioning pin 5.1 passes through the alignment hole 4 and enters the connection hole 1.11. At the same time, it is necessary to ensure that the conductive pin 6 passes through the through hole 5.2. The conductive pin 6 includes a power pin, a signal pin, and a ground pin. The three pins are arranged in a triangular pattern. After assembly, in conjunction with other foolproof structures 7 on the housing 1 (e.g., the foolproof configuration at the front end of the housing 1), the function of each pin can be accurately determined.

[0037] 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 with an anti-misalignment structure, characterized in that, include: The housing (1) has a receiving cavity (1.1) and a detection flow channel (1.2). The detection assembly includes a PCB board (2) disposed in the accommodating cavity (1.1) and a sensor unit (3) disposed in the detection flow channel (1.2) and electrically connected to the PCB board (2). The PCB board (2) is electrically connected to external electrical components. The PCB board (2) is provided with alignment holes (4); The retainer (5) is disposed within the receiving cavity (1.1) and abuts against the rear end face of the PCB board (2). The retainer (5) is provided with a positioning pin (5.1), which passes through the alignment hole (4) and enters the connection hole (1.11) on the wall of the receiving cavity (1.1) to preposition the PCB board (2).

2. A sensor with an anti-misalignment structure according to claim 1, characterized in that: The connecting hole (1.11) is located at the front end of the accommodating cavity (1.1). The positioning pin (5.1) is provided on the front end face of the retainer (5) and extends forward. The positioning pin (5.1) passes forward through the alignment hole (4) and enters the connection hole (1.11).

3. A sensor with an anti-misalignment structure according to claim 1, characterized in that: The alignment hole (4) is a "U"-shaped slot set on the PCB board (2). The spacing between the grooves of the "U"-shaped opening is adapted to the diameter of the positioning pin (5.1).

4. A sensor with an anti-misalignment structure according to claim 1, characterized in that: The PCB board (2) is provided with conductive pins (6) extending to the rear end. The retainer (5) is provided with a through hole (5.2) through which a conductive pin (6) passes.

5. A sensor with an anti-misalignment structure according to claim 4, characterized in that: The rear end of the retainer (5) is provided with a rearward extension (5.21) at the position corresponding to the through hole (5.2), and the through hole (5.2) passes through the extension (5.21).

6. A sensor with an anti-misalignment structure according to claim 5, characterized in that: The retainer (5) and the PCB board (2) are both circular thin sheet structures, and the peripheral surfaces of the retainer (5) and the PCB board (2) are configured to be in clearance fit or contact with the peripheral surface of the accommodating cavity (1.1).

7. A sensor with an anti-misalignment structure according to claim 1, characterized in that: The front end of the accommodating cavity (1.1) is provided with a radially inwardly extending flange (1.12), and the front end face of the PCB board (2) abuts against the rear end face of the flange (1.12).

8. A sensor with an anti-misalignment structure according to claim 1, characterized in that: The detection channel (1.2) is located on the housing (1) at the front end of the accommodating cavity (1.1), and the detection channel (1.2) is connected to the accommodating cavity (1.1).

Images