Sealing structure of sensor and sensor assembly

Abstract

The invention discloses a sealing structure of a sensor and a sensor assembly, and relates to the technical field of sensors, the sealing structure of the sensor comprises a shell, a circuit board and a sealing assembly, the circuit board is arranged in the shell along the vertical direction, the circuit board comprises an upper circuit processing board and a lower detection board, a sensing element is arranged on the lower detection plate, the sealing assembly is arranged above the lower detection plate, attached to the inner wall of the shell and used for isolating the upper circuit processing plate from the lower detection plate, and the detection chip and the circuit device can be isolated through the sealing assembly without arranging two shells. The upper circuit processing board is isolated and protected, the sensing element on the lower detection board can still detect temperature and humidity parameters, the operation steps are simplified, the manufacturing cost is reduced, and the sealing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a sealing structure of a sensor and a sensor component. Background Art

[0002] According to the sensor's installation position, usage scenario, and appearance and structural requirements, some sensor chips need to be inserted into the engine's intake manifold to detect the engine's intake humidity or pressure. Because the engine's intake air contains impurities such as dust and carbon powder, except for the detection chip, the sensor module devices must be in contact with the environment, and other devices or circuits must be isolated from the ambient medium.

[0003] In the prior art, two shells are provided to isolate the detection chip from the circuit device, and glue is applied between the two shells to seal. However, this sealing method is complicated to operate, has a high production cost, and has a poor sealing effect. Summary of the invention

[0004] The embodiments of the present invention provide a sealing structure of a sensor and a sensor assembly to solve the technical problems in the related art that the existing method of setting two housings to isolate a detection chip from a circuit device is complicated to operate, has a high manufacturing cost, and has a poor sealing effect.

[0005] In a first aspect, a sealing structure of a sensor is provided, comprising:

[0006] case;

[0007] A circuit board, the circuit board is arranged in the housing along a vertical direction, the circuit board comprises an upper circuit processing board and a lower detection board, and the lower detection board is provided with a sensing element;

[0008] A sealing component is disposed above the lower detection board and is in contact with the inner wall of the shell, and is used to isolate the upper circuit processing board from the lower detection board.

[0009] In some embodiments, the sealing assembly includes:

[0010] A sealing plug, the sealing plug is arranged above the lower detection plate;

[0011] A sealant is disposed above the sealing plug in a vertical direction and wraps a portion of the upper circuit processing board.

[0012] In some embodiments, a cutout is provided in the middle of the sealing plug, a groove is provided between the upper circuit processing board and the lower detection board, and the groove is embedded in the cutout.

[0013] In some embodiments, a sealing cover is provided on the top of the shell, and the sealing cover is detachably connected to the shell.

[0014] In some embodiments, the bottom of the shell is a hollow structure.

[0015] In some embodiments, connection blocks are provided on both sides of the shell, and bolt holes are provided in the connection blocks.

[0016] In some embodiments, a plug-in port extending outward is further provided on the side of the shell.

[0017] In some embodiments, the sealing plug is made of rubber material, and the sealant is made of silicone material or epoxy resin material.

[0018] In some embodiments, the sensing element is a temperature sensing element, a humidity sensing element, or a pressure sensing element.

[0019] In a second aspect, a sensor assembly is provided, comprising the aforementioned sealing structure of the sensor.

[0020] The beneficial effects brought about by the technical solution provided by the present invention include:

[0021] An embodiment of the present invention provides a sealing structure of a sensor and a sensor component, wherein the sealing structure of the sensor includes a shell, a circuit board and a sealing component, wherein the circuit board is arranged in the shell along a vertical direction, the circuit board includes an upper circuit processing board and a lower detection board, the lower detection board is provided with a sensing element, the sealing component is arranged above the lower detection board and is fitted with the inner wall of the shell, and is used to isolate the upper circuit processing board from the lower detection board. The sealing component can be used to isolate the detection chip and the circuit device without setting up two shells, thereby isolating and protecting the upper circuit processing board, and enabling the sensing element on the lower detection board to still detect temperature and humidity parameters, thereby simplifying the operation steps, reducing the production cost, and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the overall structure of a sealing structure of a sensor provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a specific structure of a sealing structure of a sensor provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of a circuit board provided in an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of a sealing plug provided by an embodiment of the present invention;

[0027] Reference numerals:

[0028] 1. Shell; 11. Sealing cover; 12. Connecting block; 121. Bolt hole; 13. Plug port;

[0029] 2. Circuit board; 21. Upper circuit processing board; 22. Lower detection board; 221. Sensing element; 23. Groove;

[0030] 3. Sealing assembly; 31. Sealing plug; 311. Grooving; 32. Sealant. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The embodiments of the present invention provide a sealing structure of a sensor and a sensor assembly, which can solve the technical problems in the related art that the existing method of setting two shells to isolate a detection chip from a circuit device is cumbersome to operate, has a high manufacturing cost, and has a poor sealing effect.

[0033] Figure 1 A sealing structure of a sensor provided in an embodiment of the present invention comprises: a housing 1, a circuit board 2 and a sealing component 3.

[0034] The circuit board 2 is arranged in the shell 1 along the vertical direction. The circuit board 2 includes an upper circuit processing board 21 and a lower detection board 22. The lower detection board 22 is provided with a sensing element 221. The sealing assembly 3 is arranged above the lower detection board 22 and is attached to the inner wall of the shell 1, so as to isolate the upper circuit processing board 21 from the lower detection board 22.

[0035] The sealing structure of the sensor in the embodiment of the present invention is provided with a shell, a circuit board and a sealing assembly. The circuit board is arranged in the shell along the vertical direction. The circuit board includes an upper circuit processing board and a lower detection board. The lower detection board is provided with a sensing element. The sealing assembly is arranged above the lower detection board and is in contact with the inner wall of the shell, and is used to isolate the upper circuit processing board from the lower detection board. The sealing assembly can be used to isolate the detection chip and the circuit device without setting up two shells, thereby isolating and protecting the upper circuit processing board, and enabling the sensing element on the lower detection board to still detect temperature and humidity parameters, thereby simplifying the operation steps, reducing the production cost, and improving the sealing effect.

[0036] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 3 As shown, the sealing assembly 3 includes: a sealing plug 31 and a sealant 32, the sealing plug 31 is arranged above the lower detection board 22, the sealant 32 is arranged above the sealing plug 31 in the vertical direction and wraps a part of the upper circuit processing board 21, the sealing plug 31 is located between the upper circuit processing board 21 and the lower detection board 22, and is used to separate the upper circuit processing board 21 from the lower detection board 22, the sealing plug 31 is also used to carry the sealant 32, and prevent the sealant 32 from penetrating into the lower detection board 22 to interfere with the sensing element 221; the sealant 32 wraps a part of the upper circuit processing board 21 and forms a barrier, which can effectively prevent impurities such as dust and carbon powder from entering the upper circuit processing board 21 from the bottom of the shell 1, thereby achieving a sealing and isolation effect.

[0037] As an optional implementation, in an embodiment of the invention, see Figure 1 , Figure 3 and Figure 4 As shown, a groove 311 is provided in the middle of the sealing plug 31, a groove 23 is provided between the upper circuit processing board 21 and the lower detection board 22, and the groove 23 is embedded in the groove 311. A groove 23 is provided on the circuit board 2 between the upper circuit processing board 21 and the lower detection board 22, and the size of the groove 23 matches the groove 311. The circuit board 2 passes through the middle of the sealing plug 31 and is clamped with the groove 311 through the groove 23, so that the sealing plug 31 can be fixed between the upper circuit processing board 21 and the lower detection board 22, and form a seal and barrier between the upper circuit processing board 21 and the lower detection board 22.

[0038] As an optional implementation, in an embodiment of the invention, see Figure 1As shown, a sealing cover 11 is provided on the top of the shell 1, and the sealing cover 11 is detachably connected to the shell 1. The sealing cover 11 closes the top of the shell 1 to isolate the upper circuit processing board 21 from the environmental medium and protect the upper circuit processing board 21. The sealing cover 11 is detachably connected to the shell 1. When the circuit board 2 or the sensing element 221 needs to be replaced, it can be replaced by only disassembling the sealing cover 11, without disassembling or replacing the shell 1 as a whole, which is convenient for replacing components and disassembly.

[0039] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the bottom of the shell 1 is a hollow structure. By setting the hollow structure, the bottom of the shell 1, that is, the lower detection plate 22, is open, so that the sensing element 221 on the lower detection plate 22 can contact the environmental medium, and the temperature parameters, humidity parameters or pressure parameters of the engine's intake air in the engine intake manifold can be detected in real time.

[0040] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, connecting blocks 12 are provided on both sides of the shell 1, and bolt holes 121 are provided in the connecting blocks 12. The connecting blocks 12 are used to connect with other components at the engine intake manifold. The embodiment of the present invention can be fixed to the engine intake manifold or other positions to be detected for detection through the connecting blocks 12. At the same time, the bolt holes 121 can be detachably connected to other components at the engine intake manifold, which is convenient for fixing and disassembly and simple to operate.

[0041] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the side of the housing 1 is also provided with a plug port 13 extending outward, and the plug port 13 is provided with a pin inside for electrically connecting with an external device to transmit power, and is also used to transmit detection data or signals.

[0042] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 4 As shown, the sealing plug 31 is made of rubber material, and the sealant 32 is made of silicone material or epoxy resin material. The rubber material can be deformed so that the sealing plug 31 is deformed under the extrusion of the inner wall of the shell 1 and fits tightly with the circuit board 2 and the inner wall of the shell 1 to form a good seal. The silicone material or epoxy resin material has good high temperature resistance and can be used for a long time in a high temperature environment. It does not harden at low temperature and also has good electrical insulation performance and very high resistivity. It can provide sealing protection for the upper circuit processing board 21 and also play an insulating role.

[0043] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, the sensing element 221 is a temperature sensing element, a humidity sensing element, or a pressure sensing element. The temperature sensing element is used to detect the intake temperature of the engine, the humidity sensing element is used to detect the intake temperature of the engine, and the pressure sensing element is used to detect the intake pressure of the engine. By setting different sensing elements 221, the embodiment of the present invention can be applied to different installation positions and detection scenarios, thereby improving the practicality of the embodiment of the present invention.

[0044] An embodiment of the present invention further provides a sensor assembly, including the sealing structure of the aforementioned sensor, the sealing structure of the sensor including: a shell 1, a circuit board 2 and a sealing assembly 3, the circuit board 2 is arranged in the shell 1 along the vertical direction, the circuit board 2 includes an upper circuit processing board 21 and a lower detection board 22, the lower detection board 22 is provided with a sensing element 221, the sealing assembly 3 is arranged above the lower detection board 22 and is in contact with the inner wall of the shell 1, and is used to isolate the upper circuit processing board 21 from the lower detection board 22.

[0045] The sensor component of the embodiment of the present invention has a sealing structure of the sensor provided with a shell, a circuit board and a sealing component. The circuit board is arranged in the shell along the vertical direction. The circuit board includes an upper circuit processing board and a lower detection board. The lower detection board is provided with a sensing element. The sealing component is arranged above the lower detection board and is fitted with the inner wall of the shell to isolate the upper circuit processing board from the lower detection board. The sealing component can be used to isolate the detection chip and the circuit device without setting up two shells, thereby isolating and protecting the upper circuit processing board, and enabling the sensing element on the lower detection board to still detect temperature and humidity parameters, thereby simplifying the operation steps, reducing the production cost, and improving the sealing effect.

[0046] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 3 As shown, the sealing assembly 3 includes: a sealing plug 31 and a sealant 32, the sealing plug 31 is arranged above the lower detection board 22, the sealant 32 is arranged above the sealing plug 31 in the vertical direction and wraps a part of the upper circuit processing board 21, the sealing plug 31 is located between the upper circuit processing board 21 and the lower detection board 22, and is used to separate the upper circuit processing board 21 from the lower detection board 22, the sealing plug 31 is also used to carry the sealant 32, and prevent the sealant 32 from penetrating into the lower detection board 22 to interfere with the sensing element 221; the sealant 32 wraps a part of the upper circuit processing board 21 and forms a barrier, which can effectively prevent impurities such as dust and carbon powder from entering the upper circuit processing board 21 from the bottom of the shell 1, thereby achieving a sealing and isolation effect.

[0047] As an optional implementation, in an embodiment of the invention, see Figure 1 , Figure 3 and Figure 4 As shown, a groove 311 is provided in the middle of the sealing plug 31, a groove 23 is provided between the upper circuit processing board 21 and the lower detection board 22, and the groove 23 is embedded in the groove 311. A groove 23 is provided on the circuit board 2 between the upper circuit processing board 21 and the lower detection board 22, and the size of the groove 23 matches the groove 311. The circuit board 2 passes through the middle of the sealing plug 31 and is clamped with the groove 311 through the groove 23, so that the sealing plug 31 can be fixed between the upper circuit processing board 21 and the lower detection board 22, and form a seal and barrier between the upper circuit processing board 21 and the lower detection board 22.

[0048] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, a sealing cover 11 is provided on the top of the shell 1, and the sealing cover 11 is detachably connected to the shell 1. The sealing cover 11 closes the top of the shell 1 to isolate the upper circuit processing board 21 from the environmental medium and protect the upper circuit processing board 21. The sealing cover 11 is detachably connected to the shell 1. When the circuit board 2 or the sensing element 221 needs to be replaced, it can be replaced by only disassembling the sealing cover 11, without disassembling or replacing the shell 1 as a whole, which is convenient for replacing components and disassembly.

[0049] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the bottom of the shell 1 is a hollow structure. By setting the hollow structure, the bottom of the shell 1, that is, the lower detection plate 22, is open, so that the sensing element 221 on the lower detection plate 22 can contact the environmental medium, and the temperature parameters, humidity parameters or pressure parameters of the engine's intake air in the engine intake manifold can be detected in real time.

[0050] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, connecting blocks 12 are provided on both sides of the shell 1, and bolt holes 121 are provided in the connecting blocks 12. The connecting blocks 12 are used to connect with other components at the engine intake manifold. The embodiment of the present invention can be fixed to the engine intake manifold or other positions to be detected for detection through the connecting blocks 12. At the same time, the bolt holes 121 can be detachably connected to other components at the engine intake manifold, which is convenient for fixing and disassembly and simple to operate.

[0051] As an optional implementation, in an embodiment of the invention, see Figure 2As shown, the side of the housing 1 is also provided with a plug port 13 extending outward, and the plug port 13 is provided with a pin inside for electrically connecting with an external device to transmit power, and is also used to transmit detection data or signals.

[0052] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 4 As shown, the sealing plug 31 is made of rubber material, and the sealant 32 is made of silicone material or epoxy resin material. The rubber material can be deformed so that the sealing plug 31 is deformed under the extrusion of the inner wall of the shell 1 and fits tightly with the circuit board 2 and the inner wall of the shell 1 to form a good seal. The silicone material or epoxy resin material has good high temperature resistance and can be used for a long time in a high temperature environment. It does not harden at low temperature and also has good electrical insulation performance and very high resistivity. It can provide sealing protection for the upper circuit processing board 21 and also play an insulating role.

[0053] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, the sensing element 221 is a temperature sensing element, a humidity sensing element, or a pressure sensing element. The temperature sensing element is used to detect the intake temperature of the engine, the humidity sensing element is used to detect the intake temperature of the engine, and the pressure sensing element is used to detect the intake pressure of the engine. By setting different sensing elements 221, the embodiment of the present invention can be applied to different installation positions and detection scenarios, thereby improving the practicality of the embodiment of the present invention.

[0054] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0055] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A sealing structure of a sensor, characterized in that: include: Housing (1); A circuit board (2), the circuit board (2) being arranged in the housing (1) along a vertical direction, the circuit board (2) comprising an upper circuit processing board (21) and a lower detection board (22), the lower detection board (22) being provided with a sensing element (221); A sealing component (3), the sealing component (3) is arranged above the lower detection board (22) and is in contact with the inner wall of the shell (1), and is used to isolate the upper circuit processing board (21) from the lower detection board (22).

2. The sealing structure of the sensor according to claim 1, characterized in that: The sealing assembly (3) comprises: A sealing plug (31), the sealing plug (31) being arranged above the lower detection plate (22); A sealant (32), wherein the sealant (32) is arranged above the sealing plug (31) in a vertical direction and wraps a portion of the upper circuit processing board (21).

3. The sealing structure of the sensor according to claim 2, characterized in that: A cutout (311) is provided in the middle of the sealing plug (31), a groove (23) is provided between the upper circuit processing board (21) and the lower detection board (22), and the groove (23) is embedded in the cutout (311).

4. The sealing structure of the sensor according to claim 1, characterized in that: A sealing cover (11) is provided on the top of the shell (1), and the sealing cover (11) is detachably connected to the shell (1).

5. The sealing structure of the sensor according to claim 4, characterized in that: The bottom of the shell (1) is a hollow structure.

6. The sealing structure of the sensor according to claim 1, characterized in that: Connecting blocks (12) are provided on both sides of the housing (1), and bolt holes (121) are provided in the connecting blocks (12).

7. The sealing structure of the sensor according to claim 6, characterized in that: The side surface of the housing (1) is also provided with an insertion port (13) extending outwards.

8. The sealing structure of the sensor according to claim 2, characterized in that: The sealing plug (31) is made of rubber material, and the sealing glue (32) is made of silicone material or epoxy resin material.

9. The sealing structure of the sensor according to claim 1, characterized in that: The sensing element (221) is a temperature sensing element, a humidity sensing element, or a pressure sensing element.

10. A sensor assembly, characterized in that: A sealing structure comprising a sensor as described in any one of claims 1 to 9.

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