CN116794112A - Detection device and method for manufacturing the same - Google Patents
Detection device and method for manufacturing the same Download PDFInfo
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- CN116794112A CN116794112A CN202211342263.1A CN202211342263A CN116794112A CN 116794112 A CN116794112 A CN 116794112A CN 202211342263 A CN202211342263 A CN 202211342263A CN 116794112 A CN116794112 A CN 116794112A
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- 238000001514 detection method Methods 0.000 title claims abstract description 166
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title description 7
- 238000000605 extraction Methods 0.000 claims description 60
- 238000004891 communication Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- CLOMYZFHNHFSIQ-UHFFFAOYSA-N clonixin Chemical compound CC1=C(Cl)C=CC=C1NC1=NC=CC=C1C(O)=O CLOMYZFHNHFSIQ-UHFFFAOYSA-N 0.000 description 1
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- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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Abstract
The application provides a detection device, which comprises a detection component, a shell and a circuit board, wherein the detection component comprises a detection element, a conductive part and a base, the detection element is connected with the conductive part, and the conductive part is connected with the base; the detection device is provided with a cavity, the shell and the circuit board are both positioned at the periphery of the cavity, the detection element is positioned in the cavity, and at least part of the conductive part is positioned outside the cavity; the base and the shell are respectively connected with the circuit board. The application also provides a manufacturing method of the detection device, which comprises the following steps: a detection assembly, a housing and a circuit board are provided, and the detection assembly, the housing and the circuit board are connected. According to the detection device and the manufacturing method thereof, the base and the shell are respectively connected with the circuit board, so that the assembly difficulty between the base and the shell is reduced, and the manufacturing difficulty of the detection device is further reduced.
Description
Technical Field
The application relates to the technical field of detection, in particular to a detection device and a manufacturing method thereof.
Background
The sensor includes a circuit board, a detection assembly, and a housing. The detection component comprises a detection element, an extraction electrode, a conductive terminal and a base, wherein the detection element is connected with the conductive terminal through the extraction electrode, and the conductive terminal penetrates through the base and is fixedly connected with the base. The base is connected with the casing, and the base encloses with the casing and is used for holding the cavity of at least part detection subassembly to the base passes through the casing and is connected with the circuit board. That is, the connection between the base and the circuit board is achieved through the housing. The shell is arranged on the periphery of the base, and the inner wall of the shell is connected with the peripheral wall of the base through bonding, welding or other modes. In order to realize the connection of the shell and the base, the shape and the size of the inner wall of the shell are matched with the outer peripheral wall of the base, and the shell and the base are accurately aligned in the assembly process, so that the manufacturing difficulty of the detection device is high.
Accordingly, improvements in the relevant structure of the sensor are needed.
Disclosure of Invention
In order to solve the problems, the application provides a detection device with low manufacturing difficulty and a manufacturing method thereof.
The application provides a detection device, which comprises a detection component, a shell and a circuit board,
the detection component comprises a detection element, a conductive part and a base, wherein the detection element is connected with the conductive part, the conductive part penetrates through the base, and the conductive part is connected with the base;
the detection device is provided with a cavity, the shell and the circuit board are both positioned at the periphery of the cavity, the detection element is positioned in the cavity, and at least part of the conductive part is positioned outside the cavity;
the base and the shell are respectively connected with the circuit board.
In the detection device provided by the application, the base and the shell are respectively connected with the circuit board, so that the assembly difficulty between the base and the shell is reduced compared with the connection of the base and the circuit board through the shell, and the manufacturing difficulty of the detection device is further reduced.
The application also provides a manufacturing method of the detection device, which comprises the following steps:
providing a detection assembly, a shell and a circuit board, wherein the detection assembly comprises a detection element, a conductive part and a base, the detection element is connected with the conductive part, the conductive part penetrates through the base, the conductive part is connected with the base, and the shell is provided with a containing cavity;
connecting the base and the circuit board;
the shell and the circuit board are connected, at least part of the accommodating cavity forms a cavity, the shell and the circuit board are both positioned at the periphery of the cavity, the detection element and the base are both positioned in the cavity, and at least part of the conductive part is positioned outside the cavity.
In the manufacturing method of the detection device provided by the application, the base and the shell are respectively connected with the circuit board, and compared with the manufacturing method of connecting the base and the shell firstly and connecting the shell and the circuit board again, the assembly difficulty between the base and the shell is reduced, and the manufacturing difficulty of the detection device is further reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a detection device provided in one embodiment of the present application;
FIG. 2 is a perspective view of a detection device according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a detection device according to one embodiment of the present application;
FIG. 4 is an assembled cross-sectional view of a second housing and a circuit board according to an embodiment of the present application;
FIG. 5 is a schematic view of a first housing and a second housing provided in accordance with one embodiment of the present application;
FIG. 6 is a schematic diagram of a circuit board provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of a detection assembly provided in one embodiment of the present application;
fig. 8 is a schematic diagram of a detection assembly according to another embodiment of the present application.
Detailed Description
For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The sensor comprises a circuit board 6, a detection assembly 1 and a housing 5. The detection assembly 1 comprises a detection element 11, extraction electrodes 21 and 22, conductive terminals 31 and 32 and a base 4, wherein the detection element 11 is connected with the conductive terminals 31 and 32 through the extraction electrodes 21 and 22, and the conductive terminals 31 and 32 penetrate through the base 4 and are fixedly connected with the base 4. In the thermal conductivity type gas sensor, the detecting element 11 includes a thermistor, so that the sensor can detect gas by using the temperature sensitive property of the thermistor. For example, when the concentration of the gas to be measured changes, and the resistance of the thermistor changes, the detection element 11 transmits corresponding signals through the extraction electrodes 21 and 22 and the conductive terminals 31 and 32, and the detection of the gas or the detection of parameters such as the gas concentration and the gas temperature can be realized by processing the corresponding signals.
In the related art, the base 4 is connected to the housing 5, the base 4 and the housing 5 enclose a cavity for accommodating at least part of the detection assembly 1, and the base 4 is connected to the circuit board 6 through the housing 5. That is, the connection between the base 4 and the circuit board 6 is achieved by the housing 5. The housing 5 is located at the periphery of the base 4, and the inner wall of the housing 5 is bonded, welded or otherwise connected with the outer peripheral wall of the base 4. In order to realize the connection between the housing 5 and the base 4, not only the shape and the size of the inner wall of the housing 5 are required to be adapted to the outer peripheral wall of the base 4, but also the housing 5 and the base 4 are required to be accurately aligned in the assembly process. Also, in some cases, the wall surface of the outer peripheral wall of the base 4 is a curved surface (e.g., a cylindrical surface), and the inner wall of the housing 5 is correspondingly provided as a curved surface. The connection between curved surfaces is more difficult than between flat surfaces, which also results in a somewhat more difficult connection between the base 4 and the housing 5. In addition, since the outer peripheral wall area of the base 4 is small, the connection area of the housing 5 and the base 4 is also small, resulting in poor connection reliability of the base 4 and the housing 5.
A first aspect of the present application provides a detection device comprising a detection assembly 1, a housing 5 and a circuit board 6, the detection assembly 1 comprising a detection element 11, a conductive portion 2 and a base 4, the detection element 11 being connected to the conductive portion 2, the conductive portion 2 penetrating the base 4 and the conductive portion 2 being connected to the base 4. The detection device is provided with a cavity 7, the shell 5 and the circuit board 6 are all arranged on the periphery of the cavity 7, the detection element 11 and the base 4 are all arranged in the cavity 7, and at least part of the conductive part 2 is arranged outside the cavity 7. The base 4 and the housing 5 are connected with the circuit board respectively.
In the present application, the connection of the base 4 and the housing 5 to the circuit board 6 means that the base 4 is directly connected to the circuit board 6 or indirectly connected to the circuit board 6, and the housing 5 is directly connected to the circuit board 6 or indirectly connected to the circuit board 6, but the base 4 is not connected to the circuit board 6 through the housing 5, and the housing 5 is not connected to the circuit board 6 through the base 4. The connection of the circuit board 6 for connection with the housing 5 and the connection of the circuit board 6 for connection with the base 4 are located at different positions of the circuit board 6, as shown for example in fig. 1.
In the detection device provided by the application, the base 4 and the shell 5 are respectively connected with the circuit board 6, and compared with the connection of the base 4 and the circuit board 6 through the shell 5, the assembly difficulty between the base 4 and the shell 5 is reduced, so that the manufacturing difficulty of the detection device is further reduced. In the detection device of the present application, in the case where the casing 5 is connected to the circuit board 6 via the base 4, the circuit board 6, the base 4, and the casing 5 are stacked in this order along the height direction H of the detection unit, and the height of the casing 5 can be reduced, so that the height of the detection device can be reduced, which is advantageous for downsizing the detection device.
In some embodiments, the base 4 is fixedly connected to the circuit board 6, the housing 5 is fixedly connected to the circuit board 6, and a space is provided between the base 4 and the housing 5, as shown in fig. 1. The detection device can displace or rotate in the transportation and use processes, the base 4 and the shell 5 are respectively and fixedly connected with the circuit board 6, and the damage of the detection device caused by mutual collision and interference among the detection component 1, the shell 5 and the circuit board 6 caused by displacement or rotation can be reduced.
In some embodiments, the face of the base 4 for connection with the circuit board 6 is planar and the face of the circuit board 6 for connection with the base 4 is planar. Thus, the connection between the base 4 and the circuit board 6 is realized through the connection between the planes, the connection difficulty is reduced, and the connection area and the connection reliability are increased. For example, as shown in fig. 3, the base 4 has a shape in which two circular truncated cones are coaxially connected.
The base 4 has a first end face 41 and a second end face 42, along the height direction H of the detection assembly, the second end face 42 is close to the circuit board 6 relative to the first end face 41, the first end face 41 and the second end face 42 are both circular planes, the radius of the first end face 41 is smaller than that of the second end face 42, the surface of the circuit board 6 for connection with the base 4 is also plane, and the second end face 42 is connected with the circuit board 6.
In some embodiments, the outer diameter of the base 4 is smaller than the inner diameter of the housing 5. In this way, the housing 5 can be provided to cover the outer periphery of the base 4.
In some embodiments, the base 4 has a first central axis L1 and the housing 5 has a second central axis L2. The first central axis L1 coincides with the second central axis L2, for example as shown in fig. 1. In this way, the detection assembly can be located in the center of the housing.
In some embodiments, the conductive portion 2 includes at least one pair of extraction electrodes 21, 22 and at least one pair of conductive terminals 31, 32. The detection element 11 is connected to at least one pair of extraction electrodes 21, 22, and the at least one pair of extraction electrodes 21, 22 is connected to at least one pair of conductive terminals 31, 32. At least one pair of conductive terminals 31, 32 extends through the base 4 and is fixedly connected to the base 4. In some embodiments, at least one pair of extraction electrodes 21, 22 is disposed axisymmetrically with respect to the first central axis L1, at least one pair of conductive terminals 31, 32 is disposed axisymmetrically with respect to the first central axis L1, and the detection element 11 is disposed axisymmetrically with respect to the first central axis L1. In some embodiments, the connection between the detection element 11 and the extraction electrodes 21, 22, the connection between the extraction electrodes 21, 22 and the conductive terminals 31, 32, and the connection between the conductive terminals 31, 32 and the base 4 are all fixed connections.
In some embodiments, as shown in connection with fig. 3 and 5, the cavity 7 comprises a first cavity 71 and a second cavity 72, the first cavity 71 is in communication with the external air of the detection device, and the second cavity 72 is a closed cavity; the housing 5 includes a first housing 51 and a second housing 52, the first housing 51 having a first chamber 511 and a first opening 512, at least part of the first chamber 511 forming a first chamber 71, the first opening 512 being in gaseous communication with the first chamber 71 and the outside of the detection device, the first housing 51 being located at the periphery of the first chamber 71. The second housing 52 has a second cavity 521, at least a portion of the second cavity 521 forms a second cavity 72, the second housing 52 is located at the periphery of the second cavity 72, the first housing 51 and the second housing 52 are fixedly connected with the circuit board 6, and the second housing 52 is hermetically connected with the circuit board 6. In some embodiments, the first housing 51 and the circuit board 6 enclose an open first cavity 71, the first cavity 71 being in communication with the outside of the detection device through a first opening 512 provided in the first housing 51; the second housing 52 and the circuit board 6 enclose a closed second cavity 72.
Accordingly, the detection assembly 1 comprises a first detection assembly 111 and a second detection assembly 112, the first detection assembly 111 and the second detection assembly 112 respectively comprising a detection element 11, at least one pair of extraction electrodes 21, 22 and at least one pair of conductive terminals 31, 32, as shown in connection with fig. 1, 3 and 4. At least a portion of the first detection assembly 111 is located within the first cavity 71. For example, the detection element 11 and at least one pair of extraction electrodes 21, 22 of the first detection assembly 111 are located within the first cavity, and a portion of each of the at least one pair of conductive terminals 31, 32 is located within the first cavity 71 and another portion is located outside the first cavity 71. At least a portion of the second sensing assembly 112 is located within the second cavity 72. For example, the detection element 11 and at least one pair of extraction electrodes 21, 22 of the second detection assembly 112 are located within the second cavity 72, and a portion of each of the at least one pair of conductive terminals 31, 32 is located within the second cavity 72 and another portion is located outside the second cavity 72. The second detection component 112 is used as a reference component of the first detection component 111, and is used for correcting the detection result of the first detection component 111, so as to eliminate the interference of environmental factors and improve the detection precision. Specifically, for example, since the thermal conductivity of the gas to be measured is different from that of the gas originally existing in the first cavity 71, when the gas to be measured enters the first cavity 71 to contact with the detection element 11 of the first detection component 111, the gas to be measured causes the resistance value of the thermistor in the detection element to change to Δr a The external environmental factor (such as ambient temperature) of the detection device causes the resistance value of the thermistor in the detection element 11 of the first detection component 111 to change to ΔR b Resistance change Δr output from the detection element 11 of the first detection element 111 1 ＝ΔR a +ΔR b . Ideally, the second detecting element 112 is in the same environment as the first detecting element 111, and the external environmental factors (such as ambient temperature) of the detecting device cause the resistance of the thermistor to change ΔR in the detecting element 11 of the second detecting element 112 2 ＝ΔR b 。ΔR 1 -ΔR 2 ＝ΔR a . Thus, the resistance change DeltaR caused by the gas to be measured can be obtained a Further, it can be determined by ΔR a Obtaining the gas parameter to be measured, such as the gas concentration.
In some embodiments, the second housing 52 has a second opening 522, the second housing 52 has a second wall 523 located at the periphery of the second opening 522, the circuit board 6 covers the second opening 522, and the projection of the second wall 523 on the circuit board 6 in the height direction of the detection device is located within the outer contour of the circuit board 6. That is, the circuit board 6 entirely covers the second opening 522. When the assembly is performed, the second detecting assembly 112 is connected with the circuit board 6, then the second housing 52 is covered outside at least part of the second detecting assembly 112, the circuit board 6 entirely covers the second opening 522, a part of the second detecting assembly 112 enters the second cavity 521 through the second opening 522, after the second housing 52 is connected with the circuit board 6, the second cavity 521 forms a closed second cavity 72, and a part of the second detecting assembly 112 is located in the second cavity 72.
In some embodiments, the first housing 51 has a third opening 513, the circuit board 6 covers the third opening 513, and the first opening 512 and the third opening 513 are located at both sides of the first housing 51, respectively, in the height direction H of the first housing 51. When the assembly is performed, the first detecting component 111 is connected with the circuit board 6, then the first shell 51 is covered outside at least part of the first detecting component 111, the circuit board 6 entirely covers the third opening 513, a part of the first detecting component 111 enters the first accommodating cavity 511 through the third opening 513, after the first shell 51 is connected with the circuit board 6, the first accommodating cavity 511 forms the first cavity 71, the first cavity 71 is communicated with the external air of the detecting device through the first opening 512, and a part of the first detecting component 111 is located in the first cavity 71. In some embodiments, the first housing 51 has a first wall surface 514 located at the periphery of the third opening 513, the circuit board 6 covers the third opening 513, and the projection of the first wall surface 514 on the circuit board 6 in the height direction H of the detection device is located within the outer contour of the circuit board 6. That is, the circuit board 6 entirely covers the third opening 513.
In some embodiments, the first housing 51 and the second housing 52 are separately provided, with a space between the first housing 51 and the second housing 52, as shown in connection with fig. 2 and 3. In this way, the influence of heat transfer between the first housing 51 and the second housing 52 on the first detection assembly 111 and the second detection assembly 112 can be reduced.
In some embodiments, the first housing 51 and the second housing 52 have a main body portion, respectively, and the main body portion 5111 of the first housing 51 and the main body portion 5211 of the second housing 52 are both cylindrical. Specifically, the first housing 51 has a first side 515 and a second side 516, and the first side 515 and the second side 516 are located on both sides of the first housing 51 along the height direction H of the first housing 51, respectively, and the main body 5111 is located between the first side 515 and the second side 516. The first side 515 and the second side 516 of the first housing 51 are open sides, the first opening 512 is located at the first side 515, and the third opening 513 is located at the second side 516. Along the height direction H of the second housing 52, the second housing 52 has a third side 524 and a fourth side 525, the main body portion 5211 is located between the third side 524 and the fourth side 525, the second opening 522 is located at the third side 524, and the fourth side 525 is a closed side.
In some embodiments, as shown in conjunction with fig. 1, 4 and 5, the height direction of the first housing 51 is parallel to the height direction of the second housing 52, and the height direction of the first housing 51 is parallel to the height direction of the first detection assembly 111, and the height direction of the second housing 52 is parallel to the height direction of the second detection assembly 112. In this way, the alignment of the first detecting component 111 and the first opening 512 is facilitated, and besides whether the first detecting component 111 and the second detecting component 112 can be in direct contact with the gas to be detected, the detecting environments of the first detecting component 111 and the second detecting component 112 tend to be the same, which is beneficial to improving the detecting precision.
In some embodiments, the central axis of the first housing 51 coincides with the central axis of the second housing 52, and the first opening 512 is located between the detection element of the first detection assembly 111 and the second housing 52. That is, the first housing 51 is disposed opposite to the second housing 52. In this way, the gas can exchange heat with the first and second housings 51 and 52 before entering the first chamber 71 through the first opening 512, so that the detection environments of the first and second detection assemblies 111 and 112 tend to be the same.
In some embodiments, at least part of the circuit board 6 is perpendicular to the height direction H of the first housing 51 or the second housing 52; the first housing 51 and the second housing 52 are located on the same side of the circuit board 6 in the height direction of the first housing 51 or the second housing 52.
In other embodiments, the main body portions of the first and second cases 51 and 52 may have other shapes, such as a hollow triangular prism, a quadrangular prism, a hexagonal prism, a spherical shape, and the like.
In addition, in order to achieve miniaturization of the sensor device, the sensor device is also required to be reduced in height.
For this purpose, the application designs the structure of the detection assembly. The detection assembly comprises at least one pair of extraction electrodes, the at least one pair of extraction electrodes comprising a first extraction electrode 21 and a second extraction electrode 22, the first extraction electrode 21 and the second extraction electrode 22 constituting a pair of extraction electrodes. The detection assembly comprises at least one pair of conductive terminals, the at least one pair of conductive terminals comprises a first conductive terminal 31 and a second conductive terminal 32, and the first conductive terminal 31 and the second conductive terminal 32 form a pair of conductive terminals.
In some embodiments, the first conductive terminal 31 has a first end 311 and a second end 312. The first end 311 and the second end 312 of the first conductive terminal 31 are located at both ends of the first conductive terminal 31, respectively, in the height direction (Z direction) of the detection assembly. The first end 311 is located inside the cavity and the second end 312 is located outside the cavity. The first end 311 of the first conductive terminal 31 is connected to the first extraction electrode 21, and the second end 312 of the first conductive terminal 31 is used for connection to a detection circuit. The first end 311 of the first conductive terminal 31 has a first end 313 and a first side 314. The first extraction electrode 21 is connected to the first side 314, and the first extraction electrode 21 is located between the base and the first end 313 along the height direction of the detection assembly; alternatively, the first extraction electrode 21 is connected to the first end 313, the first extraction electrode 21 is flat, and the first extraction electrode 21 is perpendicular to the height direction of the detection module. The second conductive terminal 32 has a first end 321 and a second end 322. Along the height direction (Z direction) of the detection assembly, the first end 321 and the second end 322 of the second conductive terminal 32 are located at two ends of the second conductive terminal 32, respectively. The first end 321 is located inside the cavity and the second end 312 is located outside the cavity. The first end 321 of the second conductive terminal 32 is connected to the second extraction electrode 22, and the second end 322 of the second conductive terminal 32 is used for connection to a detection circuit. The first end 321 of the second conductive terminal 32 has a second end 323 and a second side 324. The second extraction electrode 22 is connected to the second side 324, and the second extraction electrode 22 is located between the base and the second end 323 along the height direction of the detection assembly; alternatively, the second extraction electrode 22 is connected to the second end 323, the second extraction electrode 22 is flat, and the second extraction electrode 22 is perpendicular to the height direction of the detection module. Therefore, the height of the detection assembly is reduced, the extraction electrode and the detection element can be protected by the conductive terminal in the assembly process, and deformation caused by collision between the extraction electrode and the detection element and the inner wall of the shell is reduced.
In some embodiments, the first extraction electrode 21 is sheet-like and the second extraction electrode 22 is sheet-like. For example, the first extraction electrode 21 and the second extraction electrode 22 are each a sheet-like electrode having a thickness of the order of micrometers or millimeters, which is prepared by a PVD method.
In some embodiments, the first extraction electrode 21 is axisymmetrically disposed with the second extraction electrode 22, such as shown in fig. 8, or the first extraction electrode 21 is centrosymmetrically disposed with the second extraction electrode 22, such as shown in fig. 7. The first extraction electrode 21 and the second extraction electrode 22 have a symmetrical structure which can facilitate transmission of the detection element electrical signal.
A second aspect of the present application provides a method of manufacturing a detection device, comprising the steps of:
s1, providing a detection assembly 1, a shell 5 and a circuit board 6, wherein the detection assembly 1 comprises a detection element 11, a conductive part 2 and a base 4, the detection element 11 is connected with the conductive part 2, the conductive part 2 penetrates through the base 4, the conductive part 2 is connected with the base 4, and the shell 5 is provided with a containing cavity;
s2, connecting the base 4 and the circuit board 6;
s3, connecting the shell 5 and the circuit board 6, wherein at least part of the accommodating cavity forms a cavity 7, the shell 5 and the circuit board 6 are both positioned on the periphery of the cavity 7, the detection element 11 and the base 4 are both positioned in the cavity 7, and at least part of the conductive part 2 is positioned outside the cavity 7.
In the manufacturing method of the detection device provided by the application, the base 4 and the shell 5 are respectively connected with the circuit board 6, and compared with the manufacturing method of connecting the base 4 and the shell 5 and then connecting the shell 5 and the circuit board 6, the assembly difficulty between the base 4 and the shell 5 is reduced, and the manufacturing difficulty of the detection device is further reduced.
In some embodiments, the connection between the base 4 and the circuit board 6 may be a fixed connection, and may be a detachable connection, such as an adhesive, a solder, or a snap. In some embodiments, the connection between the housing 5 and the circuit board 6 may be adhesive or soldering. The welding can be resistance welding, laser welding, ultrasonic welding and the like.
In some embodiments, the detecting element 11 of the detecting assembly is fixedly connected to the conductive portion 2, the conductive portion 2 is fixedly connected to the base 4, the detecting circuit is at least partially disposed on the circuit board 6, and the conductive portion 2 is electrically connected to the circuit board 6. In some embodiments, specifically, the circuit board 6 is provided with a through hole 61 for mounting the conductive portion 2, as shown in fig. 6, for example. In some embodiments, the step of connecting the base 4 and the circuit board 6 includes: the conductive portion 2 is inserted through the through hole 61, and the conductive material is filled into the through hole 61, whereby the conductive portion 2 and the circuit board 6 are electrically connected by the conductive material.
In some embodiments, at least one pair of through holes 61 is provided on the circuit board 6, and the conductive portion 2 includes at least one pair of extraction electrodes 21, 22 and at least one pair of conductive terminals 31, 32, each of which is structured and connected as described above. The first conductive terminal 31 has a first end 311 and a second end 312 along the height direction of the detection assembly, the first end 311 and the second end 312 of the first conductive terminal 31 being located on both sides of the base 4, respectively; the second conductive terminal 32 has a first end 321 and a second end 322, and the first end 321 and the second end 322 of the second conductive terminal 32 are located on two sides of the base 4, for example, as shown in fig. 7 and 8. The base 4 has a first end face 41 and a second end face 42, and the second end face 42 is distant from the first end 311 of the first conductive terminal 31 (or the first end 321 of the second conductive terminal 32) with respect to the first end face 41 in the height direction of the detection assembly, and the first end face 41 is close to the first extraction electrode 21 and the second extraction electrode 22 with respect to the second end face 42. The second end face 42 is connected to the circuit board 6. The circuit board 6 has a connection portion (not shown) for connection with the base 4. The connection portion of the circuit board 6 for connection with the base 4 refers to a portion of the circuit board 6 aligned with the base when the circuit board 6 is connected with the base 4. In some embodiments, the base 4 and the circuit board 6 are connected by an adhesive, and the step of connecting the base 4 and the circuit board 6 includes:
s21, coating adhesive on at least one of the second end face 42 of the base 4 and the connecting part of the circuit board 6;
s22, penetrating the conductive terminals 31 and 32 in the detection assembly through the through holes 61 until the second end face 42 abuts against the circuit board 6;
s23, curing the adhesive.
In other embodiments, the base is soldered to the circuit board, and the step of connecting the base to the circuit board comprises:
s21', penetrating the conductive terminals 31, 32 in the detection assembly through the through hole 61 until the second end face 42 abuts against the circuit board 6;
s22', solder mount 4 and circuit board 6.
After the connection of the base 4 and the circuit board 6 is achieved, the detection element 11, the first extraction electrode 21, the second extraction electrode 22, the base 4 and the housing 5 are located on the same side of the circuit board 6 in a direction perpendicular to the circuit board 6, the first end 311 of the first conductive terminal and the first end 321 of the second conductive terminal are located on the same side of the circuit board 6 as the housing 4, and the second end 312 of the first conductive terminal and the second end 322 of the second conductive terminal are located on different sides of the circuit board 6 as the housing 4.
In some embodiments, after the step of connecting the base 4 and the circuit board 6, it further comprises: cutting the conductive terminal and removing the second end of the conductive terminal. The first conductive terminal 31 includes a transition section 315, the transition section 315 is located in the through hole 61 of the circuit board 6, one end of the transition section 315 is connected to the first end 311 of the first conductive terminal 31, and the other end of the transition section 315 is connected to the second end 312 of the first conductive terminal 31. After the first conductive terminal 31 is trimmed, the first conductive terminal 31 includes only the first end 311 located in the first cavity 71 and the transition section 315 located in the through hole 61. Likewise, the second conductive terminal 32 includes a transition 325, the transition 325 being located within the through hole 61 of the circuit board 6, one end of the transition 325 being connected to the first end 321 of the second conductive terminal 32, and the other end of the transition 325 being connected to the second end 322 of the second conductive terminal 32. After the second conductive terminal 32 is trimmed, a second conductive terminal 325, such as that shown in fig. 1. In some embodiments, the first end 311, the transition 315, and the second end 312 of the first conductive terminal 31 are coaxial, and the radius of the first conductive terminal 31 is constant; the first end 321, transition 325 and second end 322 of the second conductive terminal 32 are coaxial, and the radius of the second conductive terminal 32 is constant.
In some embodiments, the face of the housing 5 for connection with the circuit board 6 is planar and the face of the circuit board 6 for connection with the housing 5 is planar. For example, as shown in fig. 5, the main body 5111 of the first housing 51 is cylindrical, and a side surface of the first housing 51 on the first side 516 for connection to the circuit board 6 is a circular plane. The main body 5211 of the second casing 52 is cylindrical, and a side surface of the second casing 52 on the third side 524 for connection to the circuit board 6 is a circular plane.
In some embodiments, the housing 5 includes a first housing 51 and a second housing 52, the first housing 51 having a first cavity 511 and a first opening 512, the second housing 52 having a second cavity 521 connecting the housing 5 and the circuit board 6, comprising the steps of:
s31, fixedly connecting the first shell 51 and the circuit board 6, wherein at least part of the first accommodating cavity 511 forms a first cavity 71, the first shell 51 and the circuit board 6 are positioned on the periphery of the first cavity 71, and the first opening 512 is in gas communication with the outside of the first cavity 71 and the detection device;
s32, fixedly connecting the second shell 52 and the circuit board 6, and sealing and connecting the second shell 52 and the circuit board 6, wherein at least part of the second accommodating cavity 521 forms a second cavity 72, the second cavity 72 is a sealed cavity, and the second shell 52 and the circuit board 6 are both positioned on the periphery of the second cavity 72.
In the present application, since the first cavity 71 formed by connecting the first housing 51 and the circuit board 6 is an open cavity, the first housing 51 and the circuit board 6 may be fixed, and the connection between them and the circuit board 6 may be a sealed connection or a non-sealed connection. The second housing 52 needs to be connected with the circuit board 6 to form a closed second cavity 72, so that the connection between the second housing 52 and the circuit board 6 is not only required to fix the two, but also meets the sealing requirement of the second cavity 72. Thus, the second housing 52 is hermetically connected to the circuit board 6.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a detection device, includes detection component, casing and circuit board, its characterized in that:
the detection component comprises a detection element, a conductive part and a base, wherein the detection element is connected with the conductive part, the conductive part penetrates through the base, and the conductive part is connected with the base;
the detection device is provided with a cavity, the shell and the circuit board are both positioned at the periphery of the cavity, the detection element is positioned in the cavity, and at least part of the conductive part is positioned outside the cavity;
the base and the shell are respectively connected with the circuit board.
2. The detection apparatus according to claim 1, wherein: the base and the shell are respectively and fixedly connected with the circuit board, and a space is reserved between the base and the shell.
3. The detection apparatus according to claim 1, wherein: the base has a first central axis and the housing has a second central axis, the first central axis coinciding with the second central axis.
4. The detection apparatus according to claim 1, wherein: the cavity comprises a first cavity and a second cavity, the first cavity is communicated with the external gas of the detection device, and the second cavity is a closed cavity;
the shell comprises a first shell and a second shell, wherein the first shell is provided with a first containing cavity and a first opening, at least part of the first containing cavity forms the first cavity, the first opening is in gas communication with the outside of the first cavity and the detection device, the first shell is positioned at the periphery of the first cavity, the second shell is provided with a second containing cavity, at least part of the second containing cavity forms the second cavity, and the second shell is positioned at the periphery of the second cavity;
the first shell and the second shell are fixedly connected with the circuit board, and the second shell is in sealing connection with the circuit board.
5. The detection apparatus according to claim 4, wherein: the second shell is provided with a second opening, the second shell is provided with a wall surface positioned at the periphery of the second opening, the circuit board covers the second opening, and the projection of the wall surface on the circuit board is positioned in the outer contour of the circuit board along the height direction of the detection device;
the first shell is provided with a third opening, the circuit board covers the third opening, and the first opening and the third opening are respectively positioned at two sides of the first shell along the height direction of the first shell.
6. The detection apparatus according to claim 4, wherein: the first shell and the second shell are respectively and independently arranged, and a space is reserved between the first shell and the second shell.
7. The detection apparatus according to claim 1, wherein: the conductive part comprises an extraction electrode and a conductive terminal,
the conductive terminal includes a first end positioned within the cavity, the first end having a side and a distal end;
the extraction electrode is connected with the side face, and is positioned between the base and the tail end along the height direction of the detection assembly; alternatively, the extraction electrode is connected to the tip, the extraction electrode is flat plate-shaped, and the extraction electrode is perpendicular to the height direction of the detection assembly.
8. The detection apparatus according to claim 7, wherein: the extraction electrodes comprise a first extraction electrode and a second extraction electrode, and the first extraction electrode and the second extraction electrode are arranged in an axisymmetric manner or in a centrosymmetric manner.
9. A method of manufacturing a detection device, comprising the steps of:
providing a detection assembly, a shell and a circuit board, wherein the detection assembly comprises a detection element, a conductive part and a base, the detection element is connected with the conductive part, the conductive part penetrates through the base, the conductive part is connected with the base, and the shell is provided with a containing cavity;
connecting the base and the circuit board;
the shell and the circuit board are connected, at least part of the accommodating cavity forms a cavity, the shell and the circuit board are both positioned at the periphery of the cavity, the detection element is positioned in the cavity, and at least part of the conductive part is positioned outside the cavity.
10. The method of manufacturing as claimed in claim 9, wherein: the casing includes first casing and second casing, first casing has first appearance chamber and first opening, the second casing has the second appearance chamber, the cavity includes first cavity and second cavity, connect the casing with the circuit board, include the following step:
the first shell and the circuit board are fixedly connected, at least part of the first accommodating cavity forms a first cavity, the first shell and the circuit board are positioned at the periphery of the first cavity, and the first opening is in gaseous communication with the first cavity and the outside of the detection device;
the second shell is fixedly connected with the circuit board, the second shell is connected with the circuit board in a sealing mode, at least part of the second containing cavity forms a second cavity, the second cavity is a sealing cavity, and the second shell and the circuit board are located on the periphery of the second cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211342263.1A CN116794112A (en) | 2022-10-31 | 2022-10-31 | Detection device and method for manufacturing the same |
| PCT/CN2023/107432 WO2024027486A1 (en) | 2022-08-02 | 2023-07-14 | Measurement assembly, sensing apparatus, and manufacturing method for sensing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211342263.1A CN116794112A (en) | 2022-10-31 | 2022-10-31 | Detection device and method for manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116794112A true CN116794112A (en) | 2023-09-22 |
Family
ID=88044944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211342263.1A Pending CN116794112A (en) | 2022-08-02 | 2022-10-31 | Detection device and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116794112A (en) |
-
2022
- 2022-10-31 CN CN202211342263.1A patent/CN116794112A/en active Pending
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