Pressure sensor and pressure detection device

Abstract

The utility model provides a pressure sensor and a pressure detection device, and relates to the technical field of pressure sensors. The pressure sensor comprises a main body part, a circuit board and a fixing piece. And a pressure sensitive element is arranged in the main body part. And the circuit board is arranged in the main body part and is electrically connected with the pressure sensitive element. One end of the fixing member is welded to the circuit board and the other end is fixedly connected to the main body part. The pressure detection device provided by the utility model adopts the pressure sensor. The pressure sensor and the pressure detection device provided by the utility model can improve the technical problem of unstable circuit board installation or complex installation process in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to a pressure sensor and a pressure detection device. Background Art

[0002] A pressure sensor is usually composed of a pressure sensitive element and a signal processing unit, and the pressure sensitive element and the signal processing unit are usually connected via a circuit board.

[0003] However, in the prior art, the installation method of the circuit board in the pressure sensor usually has problems such as unstable installation or complicated installation process. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the technical problem of unstable installation of circuit boards or complicated installation procedures in the prior art.

[0005] The embodiment of the present utility model can be implemented as follows:

[0006] The utility model provides a pressure sensor, comprising:

[0007] The main body is provided with a pressure sensitive element;

[0008] a circuit board, disposed inside the main body, the circuit board being electrically connected to the pressure sensitive element;

[0009] A fixing member has one end welded to the circuit board and the other end fixedly connected to the main body.

[0010] The advantages of the pressure sensor provided by the utility model over the prior art include:

[0011] In this pressure sensor, when the electronic components are welded on the circuit board, the welding of the fixing part on the circuit board is completed at the same time, so that the fixing part and the circuit board form a whole. After the circuit board is assembled, the fixing part can be fixedly connected to the main part. On the one hand, the reinforcing effect of the fixing part on the circuit board can be enhanced, so that the stability of the circuit board is improved; on the other hand, it can also reduce the difficulty of assembling the circuit board in the pressure sensor, and improve the technical problems of unstable circuit board installation or complicated installation process in the existing technology.

[0012] Optionally, the fixing member is welded to the upper surface of the circuit board.

[0013] Optionally, a notch is provided on the circuit board, and part of the fixing parts passes through the notch and is fixedly connected to the main body.

[0014] Optionally, the fixing member includes a first connecting portion, a transition portion and a second connecting portion connected in sequence, the first connecting portion is welded to the upper surface of the circuit board, the second connecting portion is arranged in the notch and fixedly connected to the main body portion; the transition portion is inclined relative to the first connecting portion, and the transition portion is inclined relative to the second connecting portion.

[0015] Optionally, there are multiple fixing members, and the multiple fixing members are arranged at intervals on the outer periphery of the circuit board.

[0016] Optionally, a through hole is provided at the center of the circuit board, and the through hole is used for allowing a wire connected to the pressure sensitive element to pass through.

[0017] Optionally, the main body further includes an interface body, a shell and a signal output body;

[0018] A pressure channel communicating with the outside is provided on the interface body, a deformable diaphragm is provided at the other end of the pressure channel, and the pressure sensitive element is provided on a side of the deformable diaphragm away from the pressure channel;

[0019] An assembly space is provided inside the housing, and one end of the interface body provided with the deformable diaphragm is provided inside the assembly space; the circuit board and the fixing member are both provided in the assembly space, and the fixing member is fixedly connected to the inner wall of the housing;

[0020] The signal output body is connected to the housing and covers the assembly space; the circuit board is electrically connected to the output element in the signal output body for outputting electrical signals.

[0021] Optionally, the main body portion may further include a sealing ring, the sealing ring is arranged around the outer circumference of the circuit board, and the signal output body and the shell jointly clamp the sealing ring.

[0022] Optionally, a clamping member is provided on the shell, and the clamping member is buckled on the signal output body.

[0023] A pressure detection device comprises the above-mentioned pressure sensor.

[0024] The pressure detection device provided by the present invention adopts the above-mentioned pressure sensor. The beneficial effects of the pressure detection device relative to the prior art are the same as the beneficial effects of the above-mentioned pressure sensor relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the pressure sensor provided in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the explosion structure of the pressure sensor provided in an embodiment of the present application;

[0028] Figure 3 A top view of a local structure of a pressure sensor provided in an embodiment of the present application;

[0029] Figure 4 This is a cross-sectional view of the pressure sensor provided in an embodiment of the present application.

[0030] Icon: 10-pressure sensor; 100-main body; 101-pressure sensitive element; 110-interface body; 111-pressure channel; 112-deformable diaphragm; 120-housing; 121-assembly space; 122-clamping member; 130-signal output body; 140-sealing ring; 200-circuit board; 210-notch; 220-through hole; 300-fixing member; 310-first connecting part; 320-transition part; 330-second connecting part. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0037] See also Figure 1 In one embodiment of the present application, a pressure sensor 10 is provided. The pressure sensor 10 can be used to detect the pressure of a fluid. The pressure sensor 10 provided in this embodiment can improve the technical problems of unstable installation or complicated installation process of the circuit board 200 in the prior art.

[0038] In this embodiment, please refer to Figure 2 and Figure 4 The pressure sensor 10 includes a main body 100, a circuit board 200, and a fixing member 300. The main body 100 includes a pressure sensitive element 101. The circuit board 200 is disposed within the main body 100 and is electrically connected to the pressure sensitive element 101. The fixing member 300 has one end soldered to the circuit board 200 and the other end fixedly connected to the main body 100.

[0039] The main body 100 further includes an interface body 110, a housing 120, and a signal output body 130. The interface body 110 is provided with a pressure channel 111 that communicates with the outside world. A deformable diaphragm 112 is provided at the other end of the pressure channel 111. The pressure sensitive element 101 is disposed on the side of the deformable diaphragm 112 that is away from the pressure channel 111. An assembly space 121 is provided within the housing 120. One end of the interface body 110, on which the deformable diaphragm 112 is provided, is disposed within the assembly space 121. A circuit board 200 and a fixing member 300 are both disposed within the assembly space 121, with the fixing member 300 fixedly connected to the inner wall of the housing 120. The signal output body 130 is connected to the housing 120 and covers the assembly space 121. The circuit board 200 is electrically connected to the output member in the signal output body 130 for outputting electrical signals.

[0040] When performing fluid pressure detection, the fluid enters the pressure channel 111. Due to the pressure of the fluid, the deformable diaphragm 112 is deformed. The deformed deformed diaphragm 112 triggers the pressure sensitive element 101 to operate, and then the circuit board 200 processes the electrical signal and outputs the electrical signal to the signal output body 130. The signal output body 130 can output the electrical signal through the output component to realize pressure detection.

[0041] As described above, in the pressure sensor 10, when the electronic components are welded on the circuit board 200, the welding of the fixing part 300 on the circuit board 200 is completed at the same time, so that the fixing part 300 and the circuit board 200 form a whole. After assembling the circuit board 200, the fixing part 300 can be fixedly connected to the main part 100. On the one hand, the reinforcing effect of the fixing part 300 on the circuit board 200 can be enhanced, so that the stability of the circuit board 200 is improved; on the other hand, it can also reduce the difficulty of assembling the circuit board 200 in the pressure sensor 10, and improve the technical problems of unstable installation of the circuit board 200 or complicated installation process in the prior art.

[0042] It should be noted that, in this embodiment, when the circuit board 200 is installed in the assembly space 121, the circuit board 200 is roughly parallel to the deformable diaphragm 112. On the one hand, it can meet the installation requirements of the deformable diaphragm 112 and the circuit board 200; on the other hand, it can also facilitate the installation of the circuit board 200 in the assembly space 121.

[0043] Optionally, in this embodiment, the fixing member 300 can be fixedly connected to the housing 120 in a variety of ways. For example, the fixing member 300 can be fixed to the housing 120 by welding. For another example, the fixing member 300 can be fixedly connected to the housing 120 by bolting. For another example, the fixing member 300 can be fixed to the housing 120 by snap fastening.

[0044] In this embodiment, the fixing member 300 is soldered to the upper surface of the circuit board 200. This allows the circuit board 200 to be closer to the deformable diaphragm 112, and thus closer to the pressure-sensitive element 101, facilitating wire binding between the circuit board 200 and the pressure-sensitive element 101. Furthermore, the fixing member 300 can be soldered simultaneously with other electronic components on the circuit board 200, reducing the difficulty of installing the fixing member 300.

[0045] It should be understood that in other embodiments of the present application, the fixing member 300 may also be welded to other positions of the circuit board 200, such as the bottom surface or the side surface.

[0046] It is worth noting that in this embodiment, since the circuit board 200 is parallel to the deformable diaphragm 112 as a whole, it is more convenient to weld the fixing member 300 to the upper surface of the circuit board 200; and in the case where there is a part of the circuit board 200 that is vertical, the fixing member 300 can also be welded to the vertical part of the circuit board 200.

[0047] Further, please refer to Figure 2 and Figure 3 In this embodiment, a notch 210 is provided on the circuit board 200, and part of the fixing member 300 is fixedly connected to the main body 100 through the notch 210. When the fixing member 300 and the circuit board 200 are welded, the fixing member 300 can also be arranged corresponding to the notch 210. On the one hand, it can facilitate the fixed connection of the fixing member 300 and the shell 120; on the other hand, it can also avoid the inconvenience of assembly caused by the large volume of the whole formed by the circuit board 200 and the fixing member 300. It is worth noting that when the notch 210 is provided on the circuit board 200, compared with the pressure sensor 10 of the prior art, the volume of the whole formed by the circuit board 200 and the fixing member 300 is not much different from that of the existing circuit board 200, so there is no need to change the structure of the shell 120, and it can be directly applied to the shell 120 of the existing pressure sensor 10, thereby reducing costs.

[0048] Optionally, the fixing member 300 includes a first connecting portion 310, a transition portion 320 and a second connecting portion 330 connected in sequence, the first connecting portion 310 is welded to the upper surface of the circuit board 200, and the second connecting portion 330 is arranged in the notch 210 and fixedly connected to the main body 100; the transition portion 320 is inclined relative to the first connecting portion 310, and the transition portion 320 is inclined relative to the second connecting portion 330.

[0049] In this embodiment, the fixing member 300 can be considered a sheet-like structure, that is, the first connecting portion 310, the transition portion 320, and the second connecting portion 330 are all sheet-like. In some embodiments, the first connecting portion 310, the transition portion 320, and the second connecting portion 330 can be formed by soldering one end of a sheet-like structure to the circuit board 200, then pressing the other end of the sheet-like structure so that it sinks into the notch 210, thereby forming an inclined transition portion 320 and the first connecting portion 310 and the second connecting portion 330 located at both ends of the transition portion 320. In other words, the first connecting portion 310, the transition portion 320, and the second connecting portion 330 can be considered to be formed after assembly. Of course, in other embodiments, the fixing member 300 can also be originally composed of the first connecting portion 310, the transition portion 320, and the second connecting portion 330.

[0050] Furthermore, to further enhance the installation stability of the circuit board 200, in this embodiment, a plurality of fixing members 300 are provided, each of which is spaced apart on the outer periphery of the circuit board 200. Alternatively, the plurality of fixing members 300 are spaced apart at equal intervals on the outer periphery of the circuit board 200. This allows the circuit board 200 to be connected to the housing 120 in different orientations, thereby ensuring the overall stability of the circuit board 200.

[0051] In this embodiment, the number of the fixing members 300 is three. Of course, in other embodiments, the number of the fixing members 300 may also be two, four, five or more.

[0052] In this embodiment, a through hole 220 is provided at the center of the circuit board 200 for passing a wire connected to the pressure sensitive element 101. That is, during wire binding, the wire can pass through the through hole 220 to achieve an electrical connection between the pressure sensitive element 101 and the circuit board 200.

[0053] To enhance the overall performance and stability of the pressure sensor 10, in this embodiment, the main body 100 further includes a sealing ring 140. The sealing ring 140 is disposed around the periphery of the circuit board 200, and the signal output body 130 and the housing 120 jointly clamp the sealing ring 140. The sealing ring 140 seals the gap between the signal output body 130 and the housing 120, preventing fluids such as water from entering the assembly space 121 through the gap between the signal output body 130 and the housing 120, thereby providing stable protection for the circuit board 200. Furthermore, the sealing ring 140 encloses the circuit board 200, providing a comprehensive and stable seal for the circuit board 200 and enhancing its safety.

[0054] In this embodiment, to improve the connection stability between the signal output body 130 and the housing 120, a clamping member 122 is provided on the housing 120. The clamping member 122 is fastened to the signal output body 130. The clamping member 122 fastens the signal output body 130 to the housing 120, thereby improving the installation stability of the signal output body 130. At the same time, the clamping member 122 can also press the signal output body 130 against the sealing ring 140, thereby improving the sealing performance of the sealing ring 140.

[0055] During assembly, the hoop 122 can be assembled vertically. After the signal output body 130 is installed in the assembly space 121, the hoop 122 is bent so that the hoop 122 is buckled on the signal output body 130 to achieve compression of the signal output body 130.

[0056] Based on the pressure sensor 10 provided above, this embodiment further provides a pressure detection device (not shown), which utilizes the pressure sensor 10. Thus, the pressure detection device can address the technical issues of unstable installation or complex installation procedures of the circuit board 200 of the pressure sensor 10 in the prior art.

[0057] In summary, in the pressure sensor 10 and the pressure detection device, when the electronic components are welded on the circuit board 200, the welding of the fixing member 300 on the circuit board 200 is completed at the same time, so that the fixing member 300 and the circuit board 200 form a whole. After the circuit board 200 is assembled, the fixing member 300 can be fixedly connected to the main body 100. On the one hand, the reinforcing effect of the fixing member 300 on the circuit board 200 can be enhanced, so that the stability of the circuit board 200 is improved; on the other hand, the assembly difficulty of the circuit board 200 in the pressure sensor 10 can be reduced, and the technical problems of unstable installation or complicated installation process of the circuit board 200 in the prior art can be improved. When the fixing member 300 and the circuit board 200 are welded, the fixing member 300 can also be arranged at the notch 210. On the one hand, it can facilitate the fixed connection of the fixing member 300 to the shell 120; on the other hand, it can also avoid the inconvenience of assembly caused by the large volume of the whole formed by the circuit board 200 and the fixing member 300. It is worth noting that when a notch 210 is opened on the circuit board 200, compared with the pressure sensor 10 of the prior art, the volume of the whole formed by the circuit board 200 and the fixing part 300 is not much different from that of the existing circuit board 200, so there is no need to change the structure of the shell 120, and it can be directly applied to the shell 120 of the existing pressure sensor 10, thereby reducing costs.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A pressure sensor, characterized in that: include: A main body (100) is provided with a pressure sensitive element (101) therein; A circuit board (200) is disposed inside the main body (100), and the circuit board (200) is electrically connected to the pressure sensitive element (101); A fixing member (300) has one end welded to the circuit board (200) and the other end fixedly connected to the main body (100).

2. The pressure sensor according to claim 1, wherein The fixing member (300) is welded to the upper surface of the circuit board (200).

3. The pressure sensor according to claim 2, wherein: A notch (210) is provided on the circuit board (200), and part of the fixing member (300) passes through the notch (210) and is fixedly connected to the main body (100).

4. The pressure sensor according to claim 3, characterized in that The fixing member (300) comprises a first connecting portion (310), a transition portion (320) and a second connecting portion (330) connected in sequence, wherein the first connecting portion (310) is welded to the upper surface of the circuit board (200), and the second connecting portion (330) is arranged in the notch (210) and fixedly connected to the main body (100); the transition portion (320) is inclined relative to the first connecting portion (310), and the transition portion (320) is inclined relative to the second connecting portion (330).

5. The pressure sensor according to claim 1, wherein There are a plurality of fixing members (300), and the fixing members (300) are arranged at intervals on the outer periphery of the circuit board (200).

6. The pressure sensor according to claim 1, wherein A through hole (220) is provided at the center of the circuit board (200), and the through hole (220) is used for allowing a wire connected to the pressure sensitive element (101) to pass through.

7. The pressure sensor according to any one of claims 1 to 6, characterized in that: The main body (100) further comprises an interface body (110), a housing (120) and a signal output body (130); The interface body (110) is provided with a pressure channel (111) communicating with the outside world, a deformable diaphragm (112) is provided at the other end of the pressure channel (111), and the pressure sensitive element (101) is provided on a side of the deformable diaphragm (112) away from the pressure channel (111); An assembly space (121) is provided inside the housing (120); one end of the interface body (110) provided with the deformable diaphragm (112) is provided inside the assembly space (121); the circuit board (200) and the fixing member (300) are both provided in the assembly space (121); the fixing member (300) is fixedly connected to the inner wall of the housing (120); The signal output body (130) is connected to the housing (120) and covers the assembly space (121); the circuit board (200) is electrically connected to the output element in the signal output body (130) for outputting electrical signals.

8. The pressure sensor according to claim 7, characterized in that The main body (100) further includes a sealing ring (140), which is arranged around the outer periphery of the circuit board (200), and the signal output body (130) and the housing (120) jointly clamp the sealing ring (140).

9. The pressure sensor according to claim 7, characterized in that A hoop component (122) is provided on the housing (120), and the hoop component (122) is buckled onto the signal output body (130).

10. A pressure detection device, characterized in that: The method comprises a pressure sensor (10) as claimed in any one of claims 1 to 9.

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