CN114858731A - Correlation mode laser gas sensor packaging structure - Google Patents

Abstract

The invention discloses a through-beam mode laser gas sensor packaging structure, comprising a base, on which two insulators are embedded, two rows of connection posts are mounted on the two insulators, and the two rows of the connection posts are There is a base between the bases, and the through-beam mode laser gas sensor is fixedly installed on the base. The PIN pin of the through-beam mode laser gas sensor is connected to the upper end of the connecting column through a gold wire, and the lower end of the connecting column passes through the base and is welded to On the PCB, it is connected with the PCB circuit. In this structure, the through-beam mode laser gas sensor is fixedly installed on the base, and the base is welded on the PCB board through the connecting column, which is more firmer than the through-beam mode laser gas sensor glued to the PCB board; The height of the upper end is different, corresponding to the height of the PIN pin of the through-beam laser gas sensor to be connected, the distance in the horizontal direction is greatly shortened, and there is no height difference, and the gold wire connection is firm and not easy to break.

Description

A kind of through-beam mode laser gas sensor package structure

technical field

The invention relates to the technical field of gas sensors, in particular to a packaging structure of a laser gas sensor in a through-beam mode.

Background technique

The through-beam mode laser gas sensor can be designed using the principle that the target gas absorbs laser light of a specific wavelength. The transmitter emits laser light and receives the laser reflected by the mirror. Within a fixed optical path, the receiver receives power and monitors target gas concentration. Through-beam laser gas sensors are often used to detect the concentration of flammable, explosive, and toxic dangerous gases such as methane and carbon monoxide. However, when the existing through-beam mode laser gas sensor is installed, it is usually directly packaged on the PCB by an adhesive process, which is prone to fall off, as shown in Figure 3. In addition, the adhesive encapsulation makes the PIN pin of the sensor (currently there are 8 PIN pins in the sensor design, two of which are vacant, and only 6 PIN pins are actually used) and the PCB circuit. When the PIN pin of the sensor is connected to the PCB board circuit through the gold wire and the solder joint, it is easy to cause the gold wire to break during transportation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a through-beam mode laser gas sensor packaging structure to solve the problems mentioned in the background art. In order to achieve the above purpose, the present invention provides the following technical solution: a through-beam mode laser gas sensor packaging structure, comprising a base, two insulators are embedded on the base, and two columns of connecting posts are installed on the two insulators , a base is arranged between the two columns of the connecting columns, and the through-beam mode laser gas sensor is fixedly installed on the base, and the PIN pin of the through-beam mode laser gas sensor is connected to the upper end of the connecting column through a gold wire. The lower end is welded on the PCB board through the base, and is connected with the circuit of the PCB board.

Preferably, there are three connection posts in each row, and the upper ends of the six connection posts have different heights, and the heights of the connection posts correspond to the heights of the PIN pins of the through-beam mode laser gas sensor to be connected.

Preferably, the base is a pie-shaped metal base, and the base and the base are integral structures.

Preferably, the through beam mode laser gas sensor is welded on the base.

The technical effects and advantages of the present invention: in this structure, the through-beam mode laser gas sensor is fixedly installed on the base, and the base is welded on the PCB board through the connecting column, compared with the through-beam mode laser gas sensor glued on the PCB board More firm; the upper ends of the six connecting columns have different heights, which correspond to the heights of the PIN pins of the through-beam laser gas sensor to be connected. The distance in the horizontal direction is greatly shortened, and there is no height difference. The gold wire is firmly connected and not easy to break.

Description of drawings

Fig. 1 is the top view of the present invention;

Fig. 2 is a sectional view along the A-A direction in Fig. 1;

Figure 3 is a schematic diagram of the through-beam mode laser gas sensor being glued to a PCB.

In the picture: 1-base, 2-connecting column, 4-through beam mode laser gas sensor, 5-gold wire, 6-insulator, 7-welding point.

Detailed ways

In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the specific drawings. In the description of the present invention, it should be noted that unless otherwise specified and Definition, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; Direct connection, indirect connection through intermediate media, internal communication between two components.

Example 1

As shown in Figures 1-2, a through-beam laser gas sensor package structure includes a base 1, two insulators 6 are embedded on the base 1, two columns of connecting posts 2 are installed on the two insulators 6, and two A base is arranged between the column connecting columns 2, on which is welded a through-beam mode laser gas sensor 4, the PIN pin of the through-beam mode laser gas sensor 4 is connected to the upper end of the connection column 2 through a gold wire 5, and the lower end of the connection column 2 passes through the base. The seat 1 is soldered on the PCB board and is connected with the PCB board circuit. In this package structure, the through-beam mode laser gas sensor 4 is fixedly installed on the base 1, and the base 1 is welded to the PCB board through the connecting column 2, which is more firm than the through-beam mode laser gas sensor 4 glued to the PCB board. .

Example 2

As shown in Figures 1-2, a through-beam laser gas sensor packaging structure includes a base 1, the base 1 is a round pan-shaped metal base, and two insulators 6 are embedded on the base 1, and the two insulators Two rows of connection posts 2 are installed on the 6 , and the insulator 6 electrically insulates the base 1 from the connection posts 2 , avoiding electrical connection between the through-beam mode laser gas sensor 4 and the base 1 . A base is arranged between the two columns of connecting columns 2 , the base and the base 1 are integrated into one structure, and the through-beam mode laser gas sensor 4 is welded on the base, and the PIN pin of the through-beam mode laser gas sensor 4 is connected to the connection column 2 through a gold wire 5 On the upper end, the lower end of the connecting column 2 is welded on the PCB board through the base 1, and is connected with the circuit of the PCB board, so that the through-beam mode laser gas sensor 4 is electrically connected to the circuit of the PCB board. In this package structure, the through-beam mode laser gas sensor 4 is fixedly installed on the base 1, and the base 1 is welded to the PCB board through the connecting column 2, which is more firm than the through-beam mode laser gas sensor 4 glued to the PCB board. ;

There are three connecting columns 2 in each column, and the upper ends of the six connecting columns 2 have different heights. The distance between the PIN pin and the upper end of the connection post 2 is greatly shortened in the horizontal direction, and there is no height difference, compared with the connection method of the PIN pin of the sensor in the prior art of FIG. , the gold wires 5 in the package structure are more firmly connected and not easily broken.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments can be modified, or some technical features thereof can be equivalently replaced, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included. within the protection scope of the present invention.

Claims (4)

1. The utility model provides a correlation mode laser gas sensor packaging structure, includes the base, it has two insulators, two to inlay on the base install two spliced poles on the insulator, two be equipped with the base between the spliced pole, fixed mounting has correlation mode laser gas sensor on the base, correlation mode laser gas sensor's PIN foot passes through gold thread spliced pole upper end, the lower extreme of spliced pole passes the base welding on the PCB board, with PCB board line connection.

2. The package structure of claim 1, wherein: each row of the connecting columns are three, the heights of the upper ends of the six connecting columns are different, and the heights of the connecting columns correspond to the heights of the PIN feet of the correlation mode laser gas sensors which need to be connected.

3. The package structure of claim 1, wherein: the base is a round cake-shaped metal base, and the base are of an integrated structure.

4. The package structure of claim 1, wherein: the opposite-emission mode laser gas sensor is welded on the base.

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