Detection device

Abstract

The detection device comprises a first circuit board, a light source module, a detection probe and a shell, an optical gas chamber is arranged in the shell; the shell is provided with a first vent hole, the first vent hole is in gas communication with the outside of the detection device, and the first vent hole is in gas communication with the optical gas chamber; the light source module comprises a light source part located in the optical air chamber, the detection probe comprises a detection head part located in the optical air chamber, the detection probe is electrically connected with the first circuit board, and the light source module is electrically connected with the first circuit board; and a gap is formed between the shell and the first circuit board. According to the detection device, the gap exists between the shell and the first circuit board, so that the first circuit board has a larger heat dissipation space, and when the detection device works, the heat dissipation effect of the first circuit board is good.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular, to a detection device. Background Art

[0002] The detection device of the related art includes a housing, an optical air chamber, a light source module, a reflective surface, a probe module and a first circuit board, wherein the light source module and the probe module are both connected to the first circuit board, and the first circuit board is located outside the optical air chamber. Since the first circuit board is directly connected to the housing, the heat dissipation of the first circuit board is poor when the detection device is working. Summary of the invention

[0003] The present application aims to provide a detection device with better heat dissipation.

[0004] A detection device comprises a first circuit board, a light source module, a detection probe and a housing;

[0005] The housing has an optical air chamber inside; the housing has a first vent hole, the first vent hole is in gaseous communication with the outside of the detection device, and the first vent hole is in gaseous communication with the optical air chamber;

[0006] The light source module includes a light source part located in the optical air chamber, the detection probe includes a detection head located in the optical air chamber, the detection probe is electrically connected to the first circuit board, and the light source module is electrically connected to the first circuit board;

[0007] There is a gap between the housing and the first circuit board.

[0008] In the detection device of the present application, compared with the solution in which the shell is directly connected to the first circuit board, the structure in which there is a gap between the shell and the first circuit board allows the first circuit board to have a larger heat dissipation space, and the heat dissipation effect of the detection device is better when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of a detection device provided in one embodiment of the present application;

[0010] Figure 2 is an exploded schematic diagram of a detection device provided in one embodiment of the present application;

[0011] Figure 3 yes Figure 2 Schematic diagram of another perspective of part of the structure;

[0012] Figure 4 yes Figure 3 A three-dimensional cross-sectional schematic diagram of a part of the structure;

[0013] Figure 5is a schematic diagram of a first housing from one viewing angle provided by an embodiment of the present application;

[0014] Figure 6 It is a schematic diagram of a partial top view of the structure of a detection device provided in one embodiment of the present application;

[0015] Figure 7 This is a schematic diagram of the relationship between the first straight line and the second straight line provided in one embodiment of the present application. DETAILED DESCRIPTION

[0016] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0017] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0018] At present, there is no gap between the first circuit board 2 and the shell 1 of the relevant detection device. When the detection device is working, the first circuit board 2 has poor heat dissipation. Excessive heat may cause a short circuit when the detection device is working, thereby stopping the detection.

[0019] Reference Figure 2 As shown, the housing 1 has a length direction L, a lateral direction W and a height direction H.

[0020] Reference Figure 1 and Figure 2 As shown, the detection device 9 includes a housing 1, the housing 1 has an optical air chamber 11; the housing 1 has a first vent hole 12, the first vent hole 12 is gaseously connected to the outside of the detection device 9, and the first vent hole 12 is gaseously connected to the optical air chamber 11; the detection device 9 also includes a first circuit board 2, a light source module 4 and a detection probe 5, the light source module 4 includes a light source part located in the optical air chamber 11, the detection probe 5 includes a detection head located in the optical air chamber 11, the detection probe 5 is electrically connected to the first circuit board 2, and the light source module 4 is electrically connected to the first circuit board 2. In order to better dissipate heat during operation of the detection device 9, a gap 19 is provided between the housing 1 and the first circuit board 2.

[0021] In some embodiments, the first circuit board 2 is located outside the housing 1, and along the height direction H of the housing, the orthographic projection of the housing 1 on the first circuit board 2 is located within the outer contour of the first circuit board 2, for example Figure 2 and Figure 4 shown.

[0022] Furthermore, in some embodiments, the shell 1 includes a first positioning portion 14, which protrudes from the shell 1 in a direction away from the optical air chamber 11; the first circuit board 2 has a second positioning hole 21, and the shell 1 is connected to the first circuit board 2, and the shell 1 and the first circuit board 2 are connected to the hole wall forming the second positioning hole 21 through the first positioning portion 14. Specifically, the connection method includes a fixed connection or a limited connection.

[0023] In some embodiments, the detection device 9 includes a second circuit board 3, and the second circuit board 3 is electrically connected to the first circuit board 2, wherein the second circuit board 3 includes a plug-in portion 31. The plug-in portion 31 includes a rectangular parallelepiped or ellipsoid plug-in portion 31, for example, Figure 2 As shown, the plug-in portion 31 is a cylindrical plug-in portion 31, and the plug-in portion 31 and the second circuit board 3 are an integral part; the first circuit board 2 has a first positioning hole 22, and the plug-in portion 31 is at least partially located in the first positioning hole 22, and the plug-in portion 31 is connected to the hole wall forming the first positioning hole 22. The design of the plug-in portion 31 being inserted into the first positioning hole 22 makes the second circuit board 3 and the first circuit board 2 more firmly connected. The light source module 4 or the detection probe 5 is electrically connected to the second circuit board 3, and the second circuit board 3 is fixedly connected or limitedly connected to the housing 1; along the thickness direction of the first circuit board 2, the thickness direction of the first circuit board 2 is parallel to the height direction H of the housing 1, and the second circuit board 3 is at least partially located on the same side of the first circuit board 2 as the housing 1; the second circuit board 3 is fixedly connected or limitedly connected to the first circuit board 2, and the housing 1 is indirectly connected to the first circuit board 2 through the second circuit board 3.

[0024] In some embodiments, the light source module 4 is electrically connected to the second circuit board 3, and the light source module 4 is at least partially located in the housing 1. The detection probe 5 is electrically and directly connected to the first circuit board 2, and the detection probe 5 is at least partially located in the housing 1. In order to better dissipate heat during operation of the detection device 9, in some embodiments, refer to Figure 4 As shown, there is an angle between the second circuit board 3 and the first circuit board 2, and the optical air chamber 11 is at least partially located within the angle α, wherein the angle α is greater than 0°, and when α is in the range of 60° to 120°, the distance between the housing 1 and the first circuit board 2 is more appropriate, for example Figure 4 As shown, α is 90°. In some embodiments, along the thickness direction of the first circuit board 2, the spacing I between the first circuit board 2 and the housing 1 is greater than or equal to 0.4 mm and less than or equal to 0.7 mm, preferably 0.5 mm. The spacing I is in the range of 0.4 mm to 0.7 mm. When the detection device 9 is working, not only can the heat be dissipated normally, but the appropriate spacing can also prevent excessive dust and powder from entering and affecting the service life of the detection device 9.

[0025] In some embodiments, reference Figure 2 or Figure 3As shown, the first circuit board 2 is parallel to the length direction L and is located on one side of the housing 1 along the height direction H of the housing 1 .

[0026] In order to fix the light source module 4 more stably, in some embodiments, refer to Figure 3 As shown, the detection device 9 includes a mounting cup 6, the mounting cup 6 has a first through hole 61, and the light source module 4 is at least partially located in the first through hole 61;

[0027] Further, in some embodiments, referring to Figure 2 As shown, the housing 1 has a second through hole 13 and a groove 16, the second through hole 13 is arranged to penetrate the housing 1 along the transverse direction W, and the second through hole 13 is connected to the optical air chamber 11. The groove 16 is connected to the hole wall of the second through hole 13, the mounting cup 6 is at least partially located in the second through hole 13, the mounting cup 6 has a first step 62, the first step 62 is at least partially located in the groove 16, and the first step 62 is connected to the wall of the groove 16. Specifically, the first step 62 and the wall corresponding to the groove 16 are interference fit, or the first step 62 and the wall corresponding to the groove 16 are bonded by an adhesive, and the first step 62 is used to limit the position of the mounting cup 6 and the second through hole 13, so as to facilitate better installation of the housing 1 and the mounting cup 6.

[0028] Further, in some embodiments, referring to Figure 2 and Figure 3 As shown, the mounting cup 6 is connected to the second circuit board 3, the second circuit board 3 is connected to the housing 1, and the mounting cup 6 has a reflective surface 64, which faces the optical air chamber 11 and is arc-shaped. Further, the focus or center point of the reflective surface 64 coincides with the receiving surface of the detection probe 5, and is used to converge the light and directly reflect the light to the detection probe 5, so as to reduce the number of reflections of the light in the optical air chamber 11 and reduce the light loss. Further, the reflective surface 64 can be attached with a gold coating to increase the reflectivity and improve the detection accuracy of the detection device 9.

[0029] In order to make the mounting cup 6 and the second circuit board 3 more stably fixed, in some embodiments, the mounting cup 6 is provided with a second pin 63, and the second pin 63 is protruded away from the mounting cup 6, for example Figure 2 As shown, the second pin 63 includes two second pins 63, the second pin 63 includes a bar or a columnar body, the second circuit board 3 has a second corner hole 33, the second circuit board 3 is connected to the mounting cup 6, and the second circuit board 3 and the mounting cup 6 are connected to the hole wall of the second corner hole 33 through the second pin 63. Specifically, the connection method includes a fixed connection or a limited connection.

[0030] In order to make the light source module 4 more firmly fixed, in some embodiments, the light source module 4 includes a first pin 41, such as Figure 2As shown, the first pin 41 includes two first pins 41, the first pin 41 includes a bar or a columnar body, the second circuit board 3 has a first corner hole 32, the second circuit board 3 is connected to the light source module 4, and the light source module 4 and the second circuit board 3 are connected to the hole wall of the first corner hole 32 through the first pin 41. Specifically, the connection method includes a fixed connection or a limited connection.

[0031] In some embodiments, reference Figure 3 As shown, the housing 1 includes a first protrusion 15, which is protruding from the housing 1 in a direction away from the housing 1, and the first protrusion 15 is close to the first circuit board 2 relative to the optical air chamber 11, and the first protrusion 15 is close to the detection probe 5 relative to the light source module 4; or, the first protrusion 15 is close to the light source module 4 relative to the detection probe 5. The first protrusion 15 can be used to directly identify the position of the detection probe 5 or the light source module 4.

[0032] In order to make the detection probe 5 more firmly fixed, in some embodiments, refer to Figure 3 As shown, the detection probe 5 is provided with a third pin 53, the third pin 53 protrudes from the detection probe 5 in a direction away from the detection probe 5, the third pin 53 includes four third pins 53, the third pin 53 includes a bar or a columnar body, the first circuit board 2 has a third corner hole 23, the detection probe 5 is connected to the first circuit board 2, and the detection probe 5 and the first circuit board 2 are connected to the hole wall forming the third corner hole 23 through the third pin 53. Specifically, the connection method includes a fixed connection or a limit connection.

[0033] In some embodiments, reference Figure 3 As shown, the shell 1 has a bottom surface 18, and the bottom surface 18 is arranged facing the first ventilation hole 12. The bottom surface 18 has a third through hole 17, and the third through hole 17 is connected to the optical air chamber 11. The detection probe 5 is at least partially located in the third through hole 17. Furthermore, the bottom surface 18 also has a first hole groove 172, and the first hole groove 172 is coaxially arranged with the third through hole 17. The first hole groove 172 is connected with the third through hole 17. The detection probe 5 includes a second step 51, and the second step 51 is at least partially located in the first hole groove 172. The second step 51 is connected to the wall of the first hole groove 172. Specifically, the second step 51 and the wall corresponding to the first hole groove 172 are interference fit, or the second step 51 and the wall corresponding to the first hole groove 172 are bonded by an adhesive.

[0034] Furthermore, in order to more accurately determine the position of the detection probe 5 and the third through hole 17, in some embodiments, as Figure 3As shown, the bottom surface 18 has a notch 171, which is recessed from the side wall of the first hole groove 172 in a direction away from the first hole groove 172, and the notch 171 is connected to the first hole groove 172. The second step 51 also includes a second protrusion 52, which is protruding from the side wall of the second step 51 in a direction away from the second step 51. The second protrusion 52 is at least partially located in the notch 171, and the second protrusion 52 cooperates with the notch 171.

[0035] In order to prevent the detection device 9 from being easily affected and damaged by the external environment during detection, in some embodiments, the detection device 9 includes a shell 8, and the shell 8 has a protective effect on the detection device 9. Figure 2 As shown, the housing 8 includes a first housing 81 and a second housing 82, the first housing 81 and the second housing 82 are arranged along the height direction H, and the first housing 81 and the second housing 82 are connected. Specifically, the first housing 81 and the second housing 82 are connected by bonding or snapping.

[0036] Further, in some embodiments, referring to Figure 2 as well as Figure 5 As shown, the second housing 82 is provided with a plurality of second positioning portions 821, the first circuit board 2 has a plurality of third positioning holes 24, the second positioning portions 821 cooperate with the third positioning holes 24 to fix the first circuit board 2, the second housing 82 has a second inner cavity 822, the first circuit board 2 is located in the second inner cavity 822, specifically, four second positioning portions 821 and four third positioning holes 24 are preferred. In some embodiments, the first housing 81 has a first inner cavity 811 and a top surface 84, the first inner cavity 811 is connected to the second inner cavity 822, the first inner cavity 811 and the second inner cavity 822 form an inner cavity 80, the top surface 84 is away from the first circuit board 2 relative to the first inner cavity 811, the top surface 84 has a plurality of second vents 83, the second vents 83 are in gas communication with the first inner cavity 811, and the second vents 83 are in gas communication with the external air of the detection device 9.

[0037] In order to improve the detection accuracy of the detection device 9, in some embodiments, referring to Figure 6 As shown, the straight-cylindrical housing 1 needs to have a certain length. In order to increase the length of the housing 1 within a limited space, in this application, reference is made to Figure 7 As shown, a first straight line X1 and a second straight line X2 are defined on a first plane M perpendicular to the height direction H of the detection device 9. The housing 1 has a first projection S1 on the plane, and the first straight line X1 extends along the length direction of the first projection S1. The second straight line X2 extends along the width direction or the length direction of the detection device 9, referring to Figure 7 As shown, the width direction of the detection device 9 can refer to the P2 direction diagram, and the length direction of the detection device 9 can refer to the P1 direction diagram. Figure 7The second straight line X2 has the same extension direction as the center line of the width direction of the detection device 9. The first straight line X1 is tilted at an acute angle β relative to the second straight line X2. This is conducive to expanding the installation space of the housing 1, and correspondingly, it is also conducive to extending the distance between the light source module 4 and the detection probe 5. In this way, through a longer optical path, the gas can absorb infrared light more fully, which is conducive to improving the detection accuracy of the detection device 9.

[0038] In order to further improve the detection accuracy of the detection device 9, the detection device 9 also includes a waterproof and breathable membrane 121 to prevent impurities such as moisture or dust from entering the housing 1 to affect the detection accuracy. In some embodiments, refer to Figure 2 As shown, the housing 1 has a first vent 12, the first vent 12 is gaseously connected to the optical air chamber 11, the first vent 12 is gaseously connected to the inner cavity 80, the first vent 12 and the second vent 83 are at least partially aligned, a waterproof breathable membrane 121 is arranged between the first vent 12 and the second vent 83, the waterproof breathable membrane 121 covers the first vent 12, the waterproof breathable membrane 121 may include a waterproof breathable porous material attached to a polyester fiber cloth processed by a specific process, and the pore size is at the nanometer level, so that it can play a role of waterproof, dustproof and breathable, and the use of the waterproof breathable membrane 121 also extends the service life of the product. The waterproof breathable membrane 121 can cover the first vent 12 by pasting, specifically, preferably a double row of first vents 12, and the double row of first vents 12 are arranged in sequence on the housing 1 along the lateral direction W of the detection device 9.

[0039] The assembly of the detection device 9 comprises the following steps:

[0040] S1 , installing the light source module 4 . Insert the light source module 4 into the installation cup 6 , install the installation cup 6 in the second through hole 13 , and electrically connect the light source module 4 to the second circuit board 3 .

[0041] S2. Install the detection probe 5. The detection probe 5 is electrically and directly connected to the first circuit board 2, and the second step 51 of the detection probe 5 is placed in the first hole 172, so that the second protrusion 52 on the second step 51 is located at the notch 171, and the detection probe 5 is at least partially located in the third through hole 17.

[0042] S3, installing the second circuit board 3. The second circuit board 3 is directly connected to the housing 1 by means of adhesive; the plug-in portion 31 of the second circuit board 3 is inserted into the first positioning hole 22 on the first circuit board 2, and the plug-in portion 31 is electrically connected to the first circuit board 2, and at the same time, the first positioning portion 14 is connected to the hole wall of the second positioning hole 21, so that the housing 1 is firmly connected to the first circuit board 2;

[0043] S4, the housing 1 together with the light source module 4, the mounting cup 6, the detection probe 5, the first circuit board 2 and the second circuit board 3 are integrally installed in the outer shell 8.

[0044] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A detection device, characterized in that: It includes a first circuit board, a light source module, a detection probe and a housing; The housing has an optical air chamber inside; the housing has a first vent hole, the first vent hole is in gaseous communication with the outside of the detection device, and the first vent hole is in gaseous communication with the optical air chamber; The light source module includes a light source part located in the optical air chamber, the detection probe includes a detection head located in the optical air chamber, the detection probe is electrically connected to the first circuit board, and the light source module is electrically connected to the first circuit board; There is a gap between the housing and the first circuit board.

2. The detection device according to claim 1, characterized in that: The detection device comprises a second circuit board, the second circuit board is electrically connected to the first circuit board, the light source module or the detection probe is electrically connected to the second circuit board, and the second circuit board is fixedly connected or limit-connected to the housing; Along the thickness direction of the first circuit board, the second circuit board is at least partially located on the same side of the first circuit board as the shell; the second circuit board is fixedly connected or position-limitedly connected to the first circuit board, and the shell is indirectly connected to the first circuit board through the second circuit board.

3. The detection device according to claim 2, characterized in that: The light source module is electrically connected to the second circuit board, and the detection probe is electrically and directly connected to the first circuit board; The second circuit board includes an inserting portion, the first circuit board has a first positioning hole, and the inserting portion is at least partially located in the first positioning hole.

4. The detection device according to claim 2, characterized in that: There is an angle between the second circuit board and the first circuit board, and the optical air chamber is at least partially located within the angle, and the angle is greater than 0°.

5. The detection device according to claim 4, characterized in that: The angle is selected from 60° to 120°; Along the thickness direction of the first circuit board, a distance between the first circuit board and the housing is greater than or equal to 0.4 mm and less than or equal to 0.7 mm.

6. The detection device according to claim 1, characterized in that: The shell has a length direction, the first circuit board is parallel to the length direction, and along the height direction of the shell, the first circuit board is located at one side of the shell.

7. The detection device according to claim 3, characterized in that: The detection device comprises a mounting cup, the mounting cup has a first through hole, and the light source module is at least partially located in the first through hole; The mounting cup is connected to the second circuit board, the second circuit board is connected to the housing, the mounting cup has a reflective surface, the reflective surface faces the optical air chamber, and the reflective surface is arc-shaped.

8. The detection device according to claim 7, characterized in that: The mounting cup has a first step, the housing has a groove, and the first step is at least partially located in the groove.

9. The detection device according to claim 1, characterized in that: The housing comprises a first protrusion, the first protrusion is close to the first circuit board relative to the optical air chamber, and the first protrusion is close to the detection probe relative to the light source module; Alternatively, the first protrusion is closer to the light source module relative to the detection probe.

10. The detection device according to any one of claims 1 to 9, characterized in that: The detection device includes a shell, the shell has an inner cavity, the first circuit board and the shell are both located in the inner cavity, the shell has a second ventilation hole, the second ventilation hole is connected to the inner cavity, the first ventilation hole is connected to the inner cavity gas, the second ventilation hole and the first ventilation hole are at least partially aligned with each other, and the detection device also includes a waterproof breathable membrane, the waterproof breathable membrane is at least partially arranged between the first ventilation hole and the second ventilation hole, and the waterproof breathable membrane covers the first ventilation hole.

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