A pressure sensor

Abstract

The present invention provides a pressure sensor, which relates to the technical field of pressure sensors. The pressure sensor includes a sensing body, a first circuit board, and a second circuit board. A pressure sensitive element is provided in the sensing body. The first circuit board is provided inside the sensing body and is electrically connected to the pressure sensitive element; the plane where the first circuit board is located is parallel to the plane where the pressure sensitive element is located; and a plug hole is provided on the first circuit board. The second circuit board is provided inside the sensing body; the plane where the second circuit board is located is arranged at an angle to the plane where the first circuit board is located; a plug connector is provided at one end of the second circuit board close to the first circuit board, the plug connector is plugged into the plug hole, and the second circuit board is electrically connected to the first circuit board through the plug connector. The pressure sensor provided by the present invention can improve the technical problem of the large size of the pressure sensor in the prior art.

Description

Technical Field

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

[0002] A pressure sensor is a Wheatstone bridge circuit made of multiple resistors fabricated using semiconductor technology. These resistors are mounted on a deformable diaphragm. The diaphragm is strained by the pressure of the pressure medium being measured. This strain causes the resistance of the multiple resistors to change, and consequently, the output of the Wheatstone bridge circuit. This output is then processed by a conditioning circuit to form a specific output signal. This is the basic principle of this pressure sensor.

[0003] However, in the prior art, the overall volume of the pressure sensor is generally large, so it is difficult to install in some scenarios with small installation space, which brings great trouble to users. Summary of the Invention

[0004] The technical problem solved by the present invention is how to improve the technical problem of the large volume of the pressure sensor in the prior art.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The present invention provides a pressure sensor, comprising:

[0007] A sensing body having a pressure sensitive element therein;

[0008] A first circuit board is provided inside the sensor body and is electrically connected to the pressure sensitive element; the plane where the first circuit board is located is parallel to the plane where the pressure sensitive element is located; and a plug hole is provided on the first circuit board;

[0009] A second circuit board is arranged inside the sensor body; the plane where the second circuit board is located is arranged at an angle to the plane where the first circuit board is located; a connector is provided at one end of the second circuit board close to the first circuit board, the connector is plugged into the plug hole, and the second circuit board is electrically connected to the first circuit board through the connector.

[0010] Optionally, the connector includes a first connector and a second connector connected to each other, the first connector and the second connector are arranged at an angle; the first connector is plugged into the plug hole; and the second connector is plugged into the second circuit board.

[0011] Optionally, the first plug-in part includes a connecting part, a limiting part and an elastic part connected in sequence; one end of the connecting part away from the limiting part is connected to the second plug-in part; the width of the limiting part is greater than the aperture of the plug-in hole, and an avoidance hole is opened in the middle of the elastic part, and the width of the middle position of the elastic part is greater than the aperture of the plug-in hole.

[0012] Optionally, the width of the elastic portion at one end away from the limiting portion is smaller than the width of the plug hole.

[0013] Optionally, the thickness of the elastic portion is smaller than the diameter of the plug hole.

[0014] Optionally, the first circuit board is perpendicular to the second circuit board, and the first plug-in portion is perpendicular to the second plug-in portion.

[0015] Optionally, the sensing body further includes:

[0016] The access body is provided with a pressure channel; one end of the pressure channel is connected to the outside space, and the other end is provided with a deformable diaphragm, and the pressure sensitive element is provided on a side of the deformable diaphragm away from the pressure channel;

[0017] A first bracket is connected to the access body; the first circuit board is connected to the first bracket;

[0018] a second bracket connected to the access body, and the second bracket is connected to the first bracket; the second circuit board is connected to the second bracket;

[0019] An output component is connected to the second bracket and is electrically connected to the second circuit board. The output component is used to output an electrical signal.

[0020] Optionally, a first surrounding portion is provided at the bottom of the first bracket, and the first surrounding portion is arranged in an arc shape; a second surrounding portion is provided at the bottom of the second bracket, and the second surrounding portion is arranged in an arc shape; the first surrounding portion and the second surrounding portion are connected to form a ring, and the access body is arranged in the annular space formed by the first surrounding portion and the second surrounding portion.

[0021] Optionally, a first L-shaped hook portion is provided at the end of the first surrounding portion, and a second L-shaped hook portion is provided at the end of the second surrounding portion; the first hook portion and the second hook portion are connected to each other.

[0022] Optionally, a supporting portion is provided on the first bracket, and a plane where the supporting portion is located is parallel to a plane where the pressure sensitive element is located; and the first circuit board is provided on the supporting portion.

[0023] The pressure sensor provided by the present invention has the following advantages over the prior art:

[0024] In this pressure sensor, the existing circuit board is replaced with a separate first and second circuit board. The first circuit board is electrically connected to the pressure-sensitive element, meeting the installation requirements of the pressure-sensitive element. The second circuit board is arranged at an angle to the first circuit board. Compared to the existing integrated circuit board, this reduces the space occupied by the second circuit board in the plane of the first circuit board. This reduces the overall space occupied by the first and second circuit boards, facilitating the miniaturization of the pressure sensor. Based on this, the pressure sensor can overcome the technical problem of large size in existing pressure sensors.

[0025] Furthermore, since the first circuit board and the second circuit board are assembled by plugging the connector into the plug-in hole, when assembling the second circuit board, only a simple plugging action is required to complete the assembly of the first circuit board and the second circuit board, thereby reducing the difficulty of installation. Therefore, the miniaturization design of the pressure sensor can be completed without increasing the difficulty of assembly, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces 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.

[0027] Figure 1 This is a schematic diagram of the structure of the pressure sensor provided in the embodiment of the present application;

[0028] Figure 2 This is a schematic diagram of the explosion structure of the pressure sensor provided in an embodiment of the present application;

[0029] Figure 3 This is a schematic structural diagram of a connector provided in an embodiment of the present application from a first perspective;

[0030] Figure 4 This is a structural diagram of the connector provided in an embodiment of the present application from a second perspective;

[0031] Figure 5 This is a schematic structural diagram of the first bracket provided in an embodiment of the present application;

[0032] Figure 6 This is a schematic structural diagram of the second bracket provided in an embodiment of the present application.

[0033] Icon: 10-pressure sensor; 100-sensing body; 110-access body; 112-deformable diaphragm; 113-pressure sensitive element; 120-first bracket; 121-first surrounding part; 1211-first hook; 122-supporting part; 130-second bracket; 131-second surrounding part; 1311-second hook; 140-output component; 200-first circuit board; 210-plug hole; 300-second circuit board; 400-plug-in component; 410-first plug-in part; 411-connecting part; 412-limiting part; 413-elastic part; 4131-avoidance hole; 420-second plug-in part. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of 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 part of the embodiments of the present invention, not all of the 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.

[0035] 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 invention as claimed, 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 shall fall within the scope of protection of the present invention.

[0036] 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.

[0037] 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 product of the invention 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 should not be understood as a limitation on the present invention.

[0038] 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.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] See also Figure 1In an embodiment of the present application, a pressure sensor 10 is provided. The pressure sensor 10 can be used to perform pressure detection operations. The pressure sensor 10 provided in this embodiment can improve the technical problem of the large size of the pressure sensor 10 in the prior art.

[0041] In this embodiment, please refer to Figure 1 and Figure 2 The pressure sensor 10 includes a sensing body 100, a first circuit board 200 and a second circuit board 300. A pressure sensitive element 113 is provided in the sensing body 100. That is, the sensing body 100 is used to receive fluid and to respond to the pressure of the fluid, which can trigger the generation of an electrical signal. The first circuit board 200 is arranged inside the sensing body 100 and is electrically connected to the pressure sensitive element 113; the plane where the first circuit board 200 is located is parallel to the plane where the pressure sensitive element 113 is located; a plug hole 210 is provided on the first circuit board 200. The second circuit board 300 is arranged inside the sensing body 100; the plane where the second circuit board 300 is located is set at an angle to the plane where the first circuit board 200 is located; a connector 400 is provided at one end of the second circuit board 300 close to the first circuit board 200, the connector 400 is plugged into the plug hole 210, and the second circuit board 300 is electrically connected to the first circuit board 200 through the connector 400.

[0042] It is worth noting that in this embodiment, the first circuit board 200 is mainly used to realize wire binding with the pressure sensitive element 113, while the second circuit board 300 is mainly used to integrate electronic components for processing electrical signals; in other words, generally, the overall volume of the second circuit board 300 is larger than the overall volume of the first circuit board 200.

[0043] As described above, in this pressure sensor 10, the existing circuit board is replaced with a separate first circuit board 200 and second circuit board 300. The first circuit board 200 is electrically connected to the pressure sensitive element 113. This, on the one hand, satisfies the installation requirements of the pressure sensitive element 113. On the other hand, the second circuit board 300 is arranged at an angle to the first circuit board 200. Compared with the integral circuit board in the prior art, the space occupied by the second circuit board 300 in the plane of the first circuit board 200 can be reduced, thereby achieving the goal of reducing the overall space occupied by the first circuit board 200 and the second circuit board 300, which can facilitate the miniaturization of the pressure sensor 10. Based on this, the pressure sensor 10 can overcome the technical problem of the large size of the pressure sensor 10 in the prior art.

[0044] It is worth noting that since most electronic components are located on the second circuit board 300, arranging the second circuit board 300 at an angle to the first circuit board 200 can also meet the space requirements of the electronic components on the second circuit board 300 and facilitate the arrangement of the electronic components on the second circuit board 300. Thus, while reducing the overall space occupied by the circuit board, the space inside the sensor body 100 is further rationally utilized, making the miniaturization of the pressure sensor 10 more feasible.

[0045] Furthermore, since the first circuit board 200 and the second circuit board 300 are assembled by plugging the connector 400 into the plug hole 210, when assembling the second circuit board 300, only a simple plugging action is required to complete the assembly of the first circuit board 200 and the second circuit board 300, thereby reducing the difficulty of installation. Therefore, the miniaturization design of the pressure sensor 10 can be completed without increasing the difficulty of assembly, thereby saving costs.

[0046] Optionally, in this embodiment, the first circuit board 200 is perpendicular to the second circuit board 300. Figure 1 In the case of a viewing angle, the first circuit board 200 can be considered to be arranged horizontally, while the second circuit board 300 can be considered to be arranged vertically. It should be understood that in other embodiments, the angle between the second circuit board 300 and the first circuit board 200 can also form other angles, for example, an acute angle is formed between the first circuit board 200 and the second circuit board 300; in other words, the second circuit board 300 is arranged at an angle.

[0047] In this embodiment, please refer to Figure 2 、 Figure 3 and Figure 4 The connector 400 includes a first plug-in portion 410 and a second plug-in portion 420 connected to each other, and the first plug-in portion 410 and the second plug-in portion 420 are arranged at an angle; the first plug-in portion 410 is plugged into the plug-in hole 210; and the second plug-in portion 420 is plugged into the second circuit board 300. Generally, before the first circuit board 200 and the second circuit board 300 are assembled, the second plug-in portion 420 is first plugged into the second circuit board 300, so that the connector 400 and the second circuit board 300 form a whole. However, the whole formed by the connector 400 and the second circuit board 300 is then assembled to the first circuit board 200, that is, the first plug-in portion 410 is plugged into the plug-in hole 210, and the assembly of the first circuit board 200 and the second circuit board 300 is completed.

[0048] It should be noted that when the pressure sensor 10 needs to be maintained or disassembled, the first circuit board 200 and the second circuit board 300 can be disassembled simply by pulling out the connector 400 from the connector hole 210 , which is simple and convenient.

[0049] Furthermore, in this embodiment, the first plug-in portion 410 includes a connecting portion 411, a limiting portion 412, and an elastic portion 413, which are sequentially connected. The end of the connecting portion 411 away from the limiting portion 412 is connected to the second plug-in portion 420. The limiting portion 412 is wider than the diameter of the plug-in hole 210, and a relief hole 4131 is defined in the middle of the elastic portion 413. The width of the middle portion of the elastic portion 413 is also wider than the diameter of the plug-in hole 210. When inserting the first plug-in portion 410 into the plug-in hole 210, the end of the elastic portion 413 is first inserted into the plug-in hole 210. The provision of the relief hole 4131 in the middle of the elastic portion 413 facilitates elastic deformation of the elastic portion 413, thereby reducing the width of the elastic portion 413 and achieving the purpose of inserting the elastic portion 413 into the plug-in hole 210. Furthermore, when the elastic portion 413 is inserted into the insertion hole 210, the elastic portion 413 undergoes elastic deformation, and through its elastic recovery, the elastic portion 413 can be stably inserted into the insertion hole 210, ensuring a stable connection between the connector 400 and the first circuit board 200 and ensuring the stability of the electrical connection. Furthermore, because the width of the limiting portion 412 is greater than that of the insertion hole 210, the abutment between the limiting portion 412 and the opening of the insertion hole 210 can limit and position the first insertion portion 410, ensuring that the first insertion portion 410 is properly inserted. Furthermore, the provision of the limiting portion 412 also facilitates the operator or operating mechanism in determining whether the first insertion portion 410 is properly inserted during assembly.

[0050] In other embodiments of the present application, at least one of the connecting portion 411 and the limiting portion 412 may be omitted. When only the connecting portion 411 is omitted, the limiting portion 412 may be directly connected to the second plug-in portion 420. When only the limiting portion 412 is omitted, since the first plug-in portion 410 and the second plug-in portion 420 are arranged at an angle, limiting and positioning can be achieved through the second plug-in portion 420. When both the connecting portion 411 and the elastic portion 413 are omitted, the elastic portion 413 may be directly connected to the second plug-in portion 420, and limiting can also be achieved through the second plug-in portion 420.

[0051] Furthermore, the width of the elastic portion 413 at one end away from the limiting portion 412 is smaller than the width of the plug hole 210. This facilitates the insertion of the elastic portion 413 into the plug hole 210 and serves as an insertion guide.

[0052] In addition, the thickness of the elastic portion 413 is smaller than the diameter of the insertion hole 210. Based on this, the contact area between the elastic portion 413 and the interior of the insertion hole 210 can be reduced, thereby reducing the friction force when the elastic portion 413 is inserted into the insertion hole 210, and thus reducing the difficulty of inserting the first insertion portion 410 into the insertion hole 210, thereby improving assembly efficiency.

[0053] In this embodiment, the first circuit board 200 is perpendicular to the second circuit board 300, and the first plug-in portion 410 is perpendicular to the second plug-in portion 420; wherein, the first plug-in portion 410 is roughly parallel to the second circuit board 300, and the second plug-in portion 420 is roughly parallel to the first circuit board 200, thereby facilitating the vertical insertion of the first plug-in portion 410 into the plug-in hole 210, and facilitating the assembly of the first plug-in portion 410 and the plug-in hole 210.

[0054] In this embodiment, there are multiple plug-in connectors 400 . Correspondingly, a plurality of plug-in holes 210 are defined on the first circuit board 200 . The multiple plug-in connectors 400 are plugged into the multiple plug-in holes 210 in a one-to-one correspondence.

[0055] In this embodiment, please refer to Figure 2 、 Figure 5 and Figure 6 The sensor body 100 further includes an access body 110, a first bracket 120, a second bracket 130 and an output assembly 140. The access body 110 is provided with a pressure channel; one end of the pressure channel is connected to the outside space, and the other end is provided with a deformable diaphragm 112, and a pressure sensitive element 113 is provided on the side of the deformable diaphragm 112 away from the pressure channel. It is worth noting that in this embodiment, Figure 1 For example, the pressure channel is also arranged vertically, which can facilitate the processing of the pressure channel and the formation of the deformable diaphragm 112, reducing the difficulty of processing the access body 110. The first bracket 120 is connected to the access body 110; the first circuit board 200 is connected to the first bracket 120. The second bracket 130 is connected to the access body 110, and the second bracket 130 is connected to the first bracket 120; the second circuit board 300 is connected to the second bracket 130. The function of the first bracket 120 and the second bracket 130 is to provide support for the first circuit board 200 and the second circuit board 300, which can ensure the overall stability of the first circuit board 200 and the second circuit board 300, and can also ensure the stability of the electrical connection between the first circuit board 200 and the second circuit board 300. The output component 140 is connected to the second bracket 130, and the output component 140 is electrically connected to the second circuit board 300. The output component 140 is used to output electrical signals.

[0056] It should be noted that the sensor body 100 also includes a housing. Figure 1 and Figure 2 The housing is omitted. The housing is cylindrical, and the output component 140 and the access body 110 are respectively connected to both ends of the housing and exposed, and the first circuit board 200 and the second circuit board 300 are located inside the housing.

[0057] Optionally, in this embodiment, a first surrounding portion 121 is provided at the bottom of the first bracket 120, and the first surrounding portion 121 is arranged in an arc shape; a second surrounding portion 131 is provided at the bottom of the second bracket 130, and the second surrounding portion 131 is arranged in an arc shape; the first surrounding portion 121 and the second surrounding portion 131 are connected to form a ring, and the access body 110 is disposed in the ring space formed by the first surrounding portion 121 and the second surrounding portion 131. Arranging the first surrounding portion 121 and the second surrounding portion 131 to form a ring structure can, on the one hand, ensure that the first bracket 120 and the second bracket 130 are stably connected to the access body 110; on the other hand, it can ensure that the first bracket 120 and the second bracket 130 are closely attached to the access body 110, reducing the space occupied by the first bracket 120 and the second bracket 130, rationally utilizing the internal space of the sensing body 100, and facilitating the miniaturization of the pressure sensor 10.

[0058] The first surrounding portion 121 and the access body 110 may be connected by welding; similarly, the second surrounding portion 131 and the access body 110 may also be connected by welding. Of course, in other embodiments, the diameter of the annular space enclosed by the first surrounding portion 121 and the second surrounding portion 131 may be set to be slightly smaller than the diameter of the access body 110, so that the first surrounding portion 121 and the second surrounding portion 131 can be stably clamped to the outer circumference of the access body 110.

[0059] In addition, to enhance the connection stability between the first surrounding portion 121 and the second surrounding portion 131, an L-shaped first hook portion 1211 is provided at the end of the first surrounding portion 121, and an L-shaped second hook portion 1311 is provided at the end of the second surrounding portion 131; the first hook portion 1211 and the second hook portion 1311 are hooked to each other. The mutual hooking of the first hook portion 1211 and the second hook portion 1311 means that the front end of the first hook portion 1211 is hooked into the inner groove of the second hook portion 1311, and correspondingly, the front end of the second hook portion 1311 is hooked into the inner groove of the first hook portion 1211. Thus, the mutual engagement can enhance the connection stability of the first surrounding portion 121 and the second surrounding portion 131.

[0060] It should be understood that in other embodiments, the first hook portion 1211 and the second hook portion 1311 may also be eliminated.

[0061] In this embodiment, a supporting portion 122 is provided on the first bracket 120. The plane of the supporting portion 122 is parallel to the plane of the pressure-sensitive element 113. The first circuit board 200 is mounted on the supporting portion 122. On the one hand, the supporting portion 122 provides stable support for the first circuit board 200, ensuring its stability. On the other hand, the first bracket 120 alone can be used to support the first circuit board 200, preventing it from affecting the deformable diaphragm 112 and ensuring accurate pressure detection.

[0062] In summary, in this pressure sensor 10, the existing circuit board is replaced with a separate first circuit board 200 and second circuit board 300. The first circuit board 200 is electrically connected to the pressure sensitive element 113, which can meet the installation requirements of the pressure sensitive element 113. Furthermore, the second circuit board 300 is arranged at an angle to the first circuit board 200. Compared with the integral circuit board in the prior art, the space occupied by the second circuit board 300 in the plane of the first circuit board 200 can be reduced, thereby achieving the goal of reducing the overall space occupied by the first circuit board 200 and the second circuit board 300, which can facilitate the miniaturization of the pressure sensor 10. Based on this, the pressure sensor 10 can overcome the technical problem of the large size of pressure sensors 10 in the prior art. Furthermore, since the first circuit board 200 and the second circuit board 300 are assembled by plugging the connector 400 into the plug hole 210, when assembling the second circuit board 300, only a simple plugging action is required to complete the assembly of the first circuit board 200 and the second circuit board 300, thereby reducing the difficulty of installation. Therefore, the miniaturization design of the pressure sensor 10 can be completed without increasing the difficulty of assembly, thereby saving costs.

[0063] 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 sensing body (100) is provided with a pressure sensitive element (113); A first circuit board (200) is disposed inside the sensing body (100) and is electrically connected to the pressure sensitive element (113); the plane where the first circuit board (200) is located is parallel to the plane where the pressure sensitive element (113) is located; and a plug hole (210) is provided on the first circuit board (200); A second circuit board (300) is provided inside the sensing body (100); the plane where the second circuit board (300) is located is arranged at an angle to the plane where the first circuit board (200) is located; a plug-in connector (400) is provided at one end of the second circuit board (300) close to the first circuit board (200), the plug-in connector (400) is plugged into the plug hole (210), and the second circuit board (300) is electrically connected to the first circuit board (200) via the plug-in connector (400); The plug connector (400) comprises a first plug connector (410) and a second plug connector (420) connected to each other, wherein the first plug connector (410) and the second plug connector (420) are arranged at an angle; the first plug connector (410) is plugged into the plug hole (210); and the second plug connector (420) is plugged into the second circuit board (300); The sensing body (100) further comprises: an access body (110) on which a pressure channel is provided; one end of the pressure channel is connected to the external space, and the other end is provided with a deformable diaphragm (112), and the pressure sensitive element (113) is provided on a side of the deformable diaphragm (112) away from the pressure channel; a first bracket (120) connected to the access body (110); the first circuit board (200) is connected to the first bracket (120); a second bracket (130) is connected to the access body (110), and the second bracket (130) is connected to the first bracket (120); the second circuit board (300) is connected to the second bracket (130); an output component (140) is connected to the second bracket (130), and the output component (140) is electrically connected to the second circuit board (300), and the output component (140) is used to output an electrical signal; The bottom of the first bracket (120) is provided with a first surrounding portion (121), and the first surrounding portion (121) is arranged in an arc shape; the bottom of the second bracket (130) is provided with a second surrounding portion (131), and the second surrounding portion (131) is arranged in an arc shape; the first surrounding portion (121) and the second surrounding portion (131) are connected to form a ring, and the access body (110) is arranged in the ring space formed by the first surrounding portion (121) and the second surrounding portion (131); the first The end of the surrounding portion (121) is provided with a first L-shaped hook portion (1211), and the end of the second surrounding portion (131) is provided with a second L-shaped hook portion (1311); the first hook portion (1211) and the second hook portion (1311) are connected to each other; the first bracket (120) is provided with a supporting portion (122), and the plane where the supporting portion (122) is located is parallel to the plane where the pressure sensitive element (113) is located; the first circuit board (200) is provided on the supporting portion (122).

2. The pressure sensor according to claim 1, wherein The first plug-in portion (410) comprises a connecting portion (411), a limiting portion (412) and an elastic portion (413) connected in sequence; one end of the connecting portion (411) away from the limiting portion (412) is connected to the second plug-in portion (420); the width of the limiting portion (412) is greater than the aperture of the plug-in hole (210); a avoidance hole (4131) is provided in the middle of the elastic portion (413), and the width of the middle position of the elastic portion (413) is greater than the aperture of the plug-in hole (210).

3. The pressure sensor according to claim 2, wherein: The width of the elastic portion (413) at one end away from the limiting portion (412) is smaller than the width of the plug hole (210).

4. The pressure sensor according to claim 2, wherein: The thickness of the elastic portion (413) is smaller than the diameter of the plug hole (210).

5. The pressure sensor according to claim 1, wherein The first circuit board (200) is perpendicular to the second circuit board (300), and the first plug-in portion (410) is perpendicular to the second plug-in portion (420).

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