CN220972111U - A pressure sensor fixing tool - Google Patents

Abstract

The utility model provides a pressure sensor fixing tool, which can be used to fix the pressure sensor during calibration, and the contact between the pin and the fixing tool is stable, and it is not easy to be deformed or damaged by force. It includes a tool base plate and a PCB board, which is used to install the pressure sensor, the left and right sides of the pressure sensor are provided with pins bent obliquely upward, the tool base plate is provided with a groove for placing the pressure sensor, the front and rear sides of the groove are provided with a block for preventing the pressure sensor from moving forward and backward, the left and right sides of the groove are provided with elastic springs arranged oppositely, the lower part of the elastic spring is connected to the PCB board, the upper part of the elastic spring is provided with a contact end bent toward the inner direction of the corresponding groove, and the spacing between the contact ends of the elastic springs on the left and right sides of the same groove is less than the maximum spacing of the pins bent obliquely upward on the left and right sides of the pressure sensor, and greater than the minimum spacing of the pins bent obliquely upward on the left and right sides of the pressure sensor.

Description

A pressure sensor fixing tool

Technical Field

The utility model relates to the technical field of pressure sensor production, in particular to a pressure sensor fixing tool.

Background technique

The pressure sensor 100 generally includes a gas nozzle 101 at the top and multiple pins 102 extending horizontally on both sides and then bending upward obliquely. The gas nozzle 101 is used to connect with the air pipe. The pressure sensor needs to be calibrated during the production process. When calibrating the pressure sensor, a fixed tool is needed to fix the pressure sensor. The existing fixed tooling includes the following three types:

The fixed fixture 1 as shown in Figure 1 includes a PCB board 1 and a probe 103 connected to the PCB board 1 and arranged vertically upward. The pressure sensor 100 with the air nozzle 101 facing upward is placed on the fixture base plate 2 above the PCB board 1. The pressure sensor 100 is connected to the fixture by pressing the horizontal part of the pin 102 on the probe 103. However, since the horizontal part of the pin 102 is too short, only 1 mm, the connection between the two cannot be accurately guaranteed. The probe is easy to slide between the two pins, which can easily cause poor contact and short circuit.

The second fixed tooling as shown in FIG2 includes a tooling base plate 2 at the bottom, a PCB board 1 arranged on both sides of the tooling base plate 2, a probe 103 connected to the PCB board 1 and arranged horizontally, and an air nozzle 101 of the pressure sensor 100 is placed on the tooling base plate 2 facing upwards. An adjustment component 106 (adjusting bolt, adjusting nut) and a spring 105 are arranged between the PCB board 1 and the tooling base plate 2. By turning the adjusting nut, the probes 103 on the PCB boards on both sides can be brought close to and pressed on the bent part of the pin 102. However, the pressure of the tooling probe 103 is difficult to ensure. If the pressure is too small, it is easy to cause poor contact between it and the pin. If the pressure is too large, the pin will be bent, resulting in a poor appearance.

The fixed fixture three is shown in Figure 3: it includes a PCB board 1 and a fixture bottom plate 2 located at the bottom. A double-sided clip needle 104 is installed on the PCB board 1 to replace the probe 103 in the fixed fixture one. The double-sided clip needle 104 can be purchased directly, and it is mainly composed of two elastic springs. The tops of the elastic springs are relatively bent to clamp the pins located in the middle. The air nozzle 101 of the pressure sensor 100 is placed downward and the vertically downward probe 103 is inserted into the double-sided clip needle 104. However, the use of the double-sided clip needle can easily bend the pin when clamping it. At the same time, the product air nozzle and the pin are located in the same direction, which makes the air pipe position required by the product too close to the clip needle position, making it difficult to use.

Utility Model Content

In view of the problems of existing pressure sensor fixing tooling such as poor contact between probes and pins, easy deformation of pins due to large forces, and easy damage of pins by using double-sided clip needles, the utility model provides a pressure sensor fixing tooling, which can be used to fix the pressure sensor during calibration. At the same time, the contact between the pins and the fixing tooling is stable and not easily deformed or damaged by forces.

The technical solution is as follows: a pressure sensor fixing tool, which includes a tool base plate and a PCB board, which is used to install the pressure sensor, and the left and right sides of the pressure sensor are provided with pins bent obliquely upward, characterized in that: the tool base plate is provided with a groove for placing the pressure sensor, and the front and rear sides of the groove are provided with blocks for preventing the pressure sensor from moving forward and backward, and the left and right sides of the groove are provided with elastic springs arranged oppositely, the lower part of the elastic spring is connected to the PCB board, and the upper part of the elastic spring is provided with a contact end bent toward the inner direction of the corresponding groove, and the spacing between the contact ends of the elastic springs on the left and right sides of the same groove is less than the maximum spacing of the pins bent obliquely upward on the left and right sides of the pressure sensor, and greater than the minimum spacing of the pins bent obliquely upward on the left and right sides of the pressure sensor.

It is further characterized by:

The tooling bottom plate is also provided with a baffle, which contacts a side of the elastic spring sheet facing away from the groove, and is located below the contact end.

The beneficial effects of the utility model are as follows: when the pressure sensor is to be installed on the tooling, the pressure sensor can be directly placed in the groove, and the pressure sensor can be connected to the PCB board by contacting the elastic reed with the obliquely upward pin of the pressure sensor. Since the contact end of the elastic reed contacts the obliquely upward pin, the contact area is large, stable contact and stable installation are possible, and at the same time, the pin of the pressure sensor is pressed on the contact end of the elastic reed by gravity, and the force is stable, which will not cause excessive bending of the pin to cause deformation of the product appearance, and after the pressure sensor is installed on the tooling, there can be sufficient space for connecting the air pipe.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an existing fixed tooling;

FIG2 is a schematic diagram of the structure of the existing fixed tooling 2;

FIG3 is a schematic diagram of the structure of the existing fixed tooling three;

FIG4 is a schematic diagram of the structure of the utility model.

In the figure, 100 is a pressure sensor, 101 is an air nozzle, 102 is a pin, 103 is a probe, 104 is a double-sided clip needle, 105 is a spring, 106 is an adjustment component, 1 is a PCB board, 2 is a tooling base plate, 3 is a stopper, 4 is an elastic spring leaf, 5 is a contact end, and 6 is a stop bar.

Detailed ways

A pressure sensor fixing tool as shown in Figure 4 includes a tool base plate 2 and a PCB board (not shown in the figure), which is used to install a pressure sensor 100. The pressure sensor 100 is provided with pins 102 bent obliquely upward on the left and right sides, and an air nozzle 101 is provided on the top. A groove for placing the pressure sensor 100 is provided on the tool base plate 1, and blocks 3 for preventing the pressure sensor 100 from moving forward and backward are provided on the front and rear sides of the groove. Elastic springs 4 are arranged oppositely on the left and right sides of the groove. The lower part of the elastic spring 4 is connected to the PCB board, and the upper part of the elastic spring 4 is provided with a contact end 5 bent toward the inner direction of the corresponding groove. The spacing between the contact ends 5 of the elastic springs 4 on the left and right sides of the same groove is smaller than the maximum spacing of the pins 102 bent obliquely upward on the left and right sides of the pressure sensor 100, and larger than the minimum spacing of the pins 102 bent obliquely upward on the left and right sides of the pressure sensor 100.

The material of the tooling base plate 2 can be FR-4, and the front and rear stop blocks 3 are set to limit the forward and backward movement of the pressure sensor. The elastic spring 4 is made of conductive metal, which can be obtained by splitting the two elastic springs in the double-sided clip needle 104. When in use, the pressure sensor 100 is placed in the groove with the air nozzle 101 facing upward, and the pin can be pressed on the contact end 5 of the elastic spring 4.

In addition, a stop bar 6 is fixed to the tooling bottom plate 2 by screws, and the stop bar 6 contacts the side of the elastic spring 4 facing away from the groove, and the stop bar 6 is located below the contact end 5. The stop bar 6 can be made of FR-4 horizontal strips, which are used to control the direction of the elastic spring 4, prevent the elastic spring 4 from excessive bending, and reduce the deformation of the elastic spring, thereby increasing the service life of the elastic spring 4.

The above are only preferred specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any changes or substitutions that can be easily thought of by anyone familiar with the technology within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims (2)

1. A pressure sensor fixing tool, comprising a tool base plate and a PCB board, which is used to install a pressure sensor, wherein the left and right sides of the pressure sensor are provided with pins bent obliquely upward, and the characteristic is that: a groove for placing the pressure sensor is provided on the tool base plate, and blocks for preventing the pressure sensor from moving forward and backward are provided on the front and rear sides of the groove, and elastic springs arranged oppositely are provided on the left and right sides of the groove, the lower part of the elastic spring is connected to the PCB board, and the upper part of the elastic spring is provided with a contact end bent toward the inner direction of the corresponding groove, and the spacing between the contact ends of the elastic springs on the left and right sides of the same groove is less than the maximum spacing of the pins bent obliquely upward on the left and right sides of the pressure sensor, and greater than the minimum spacing of the pins bent obliquely upward on the left and right sides of the pressure sensor. 2. A pressure sensor fixing tool according to claim 1, characterized in that: a baffle is also provided on the tool bottom plate, the baffle is in contact with a side of the elastic spring sheet facing away from the groove, and the baffle is located below the contact end.