pressure sensor

Abstract

The utility model provides a kind of pressure sensor, the pressure sensor includes: the pressure sensor includes: shell (2), it includes the first air cover (5) and second air cover (4) installed to each other;Pressure sensing component (6), it is clamped between first air cover and second air cover, the cavity between first air cover and second air cover is separated into upper chamber (21) and lower chamber (22) by pressure sensing component;Magnetic core assembly (7), it is carried above pressure sensing component, magnetic core assembly moves according to the deformation of pressure sensing component relative shell;Coil (8), it is coaxially arranged with shell, when magnetic core assembly moves relative shell, the inductance of coil changes;And printed circuit board (10), it is installed on first air cover, two ends of coil are electrically connected to printed circuit board, printed circuit board has multiple soldering points capable of patch mounting capacitor and multiple contacts capable of being electrically connected with both terminal and capacitor.

Description

Technical Field

[0001] This application relates to a sensor, and more particularly to a pressure sensor for detecting operating parameters of household appliances. Background Technology

[0002] With the development of smart homes and the increasing demands of users for the performance of home appliances, washing machines and other home appliances are facing higher requirements in terms of control precision, energy efficiency management, and intelligence. To achieve more precise water level control, automatic dispensing, and energy-saving operation, pressure sensors are being used more widely in home appliances. However, existing pressure sensors still face many challenges in terms of size, ease of installation, cost control, and environmental adaptability.

[0003] Especially in space-constrained applications such as washing machines, sensors not only need to be small and easy to integrate, but also require good accuracy and long-term stability to ensure the reliability and safety of equipment operation. At the same time, the market urgently needs a universal sensor solution with good compatibility that can be adapted to various home appliance models to reduce the complexity of overall machine design and production, and reduce manufacturing costs.

[0004] Therefore, in the field of home appliances, there is an urgent need for a pressure sensor that can meet the trend of miniaturization, has high accuracy, good reliability, is easy to install, and reduces costs, so as to better meet the actual needs of the market and promote the development of home appliances towards intelligence, integration, and high performance. Utility Model Content

[0005] In a first aspect, this invention provides a pressure sensor that meets the trend of miniaturization while possessing high accuracy, good reliability, ease of installation, and reduced cost. The pressure sensor includes a housing comprising a first and a second gas cap mounted to each other.

[0006] A pressure sensing component is sandwiched between a first air cover and a second air cover, and the chamber between the first air cover and the second air cover is divided into an upper chamber and a lower chamber by the pressure sensing component.

[0007] A magnetic core assembly, which is supported above a pressure sensing component, and the magnetic core assembly moves relative to the housing according to the deformation of the pressure sensing component;

[0008] A coil, coaxially arranged with the housing, wherein the inductance of the coil changes as the core assembly moves relative to the housing; and

[0009] A printed circuit board is mounted on the first gas cover. The two ends of the coil are electrically connected to the printed circuit board. The printed circuit board outputs a signal according to the inductance change of the coil. The printed circuit board has multiple solder points for surface mount capacitors and multiple contacts for electrical connection to both terminals and capacitors.

[0010] In another aspect of this invention, the printed circuit board includes two capacitors and a terminal that forms part of an oscillation circuit, the terminal being used to output a signal.

[0011] In another aspect of the present invention, the printed circuit board includes a printed circuit board body extending along the length direction, the printed circuit board body including a first ear and a second ear located at both ends, the first ear and the second ear being electrically connected to the coil respectively.

[0012] In another aspect of this utility model, the printed circuit board body includes a first contact and a second contact electrically connected to the first ear and the second ear respectively, and a third contact located between the first contact and the second contact. The first solder joint and the second solder joint extend from the first contact and the third contact toward each other but are not electrically connected. The third solder joint and the fourth solder joint extend from the second contact and the third contact toward each other but are not electrically connected.

[0013] In another aspect of this invention, the first solder joint and the second solder joint are respectively surface-mounted to the two leads of the surface-mount capacitor, and the third solder joint and the fourth solder joint are respectively surface-mounted to the two leads of the surface-mount capacitor.

[0014] In another aspect of this invention, each terminal has a meandering structure, including a relatively long horizontally extending terminal output portion, a vertical transition portion, a horizontally extending terminal connection portion located at the maximum height, and a terminal mounting portion extending vertically downward from one end of the terminal connection portion.

[0015] In another aspect of this invention, the printed circuit board body further includes a groove located on the side, the groove being used to receive a terminal mounting portion of the terminal.

[0016] In another aspect of this invention, the horizontal distance between the terminal mounting portion and the vertical transition portion of the terminal is slightly greater than the lateral width of the printed circuit board body at the groove.

[0017] In another aspect of this utility model, a through hole is provided at the terminal connection portion, the through hole penetrates the terminal connection portion and extends through a portion of the terminal mounting portion, the terminal is able to receive the lead of the capacitor at the through hole and solder it together with the lead to the contact of the printed circuit board body.

[0018] In another aspect of the present invention, a mounting base for mounting the printed circuit board is provided on the first gas cover, and the terminal mounting portion is provided with a narrowing portion that can be received in a lateral protrusion of a complementary shape of the mounting base.

[0019] In another aspect of this invention, the mounting base includes opposing walls and a locking mechanism extending vertically upward from its upper surface, the distance between the walls and the locking mechanism being slightly greater than the width of the printed circuit board body.

[0020] In another aspect of this invention, the engaging mechanism is provided with a latching portion protruding toward the wall portion at its upper end.

[0021] In another aspect of this invention, the plurality of solder joints and the plurality of contacts are disposed on the same surface of the printed circuit board; or

[0022] The plurality of solder joints are disposed on one surface of the printed circuit board, and the plurality of contacts are disposed on another surface of the printed circuit board opposite to the first surface.

[0023] The foregoing description of the present invention is not intended to represent every embodiment or aspect of this disclosure. Rather, it merely provides examples of some novel concepts and features set forth herein. The foregoing features and advantages, as well as other features and accompanying advantages, will become apparent when taken in conjunction with the accompanying drawings and the appended claims, based on the following detailed description of illustrative examples and representative models for carrying out this disclosure. Attached Figure Description

[0024] This disclosure will be more fully understood from the detailed description and accompanying drawings.

[0025] Figure 1 A perspective view of a pressure sensor according to an embodiment of the present invention is shown;

[0026] Figure 2 It shows Figure 1 A cross-sectional view of a pressure sensor according to an embodiment of the present invention;

[0027] Figure 3 It shows Figure 2 The image shown is a partially enlarged cross-sectional view of a pressure sensor according to an embodiment of the present invention.

[0028] Figure 4 A perspective view of a portion of a pressure sensor according to an embodiment of the present invention is shown, illustrating a printed circuit board mounted on a first gas cover of the pressure sensor housing.

[0029] Figure 5A schematic perspective view of the coil of a pressure sensor according to an embodiment of the present invention is shown;

[0030] Figure 6 A circuit diagram of a printed circuit board for a pressure sensor according to an embodiment of the present invention is shown.

[0031] Figure 7 A perspective view of a printed circuit board of a pressure sensor according to an embodiment of the present invention is shown;

[0032] Figure 8 A perspective view of the main body of the printed circuit board of a pressure sensor according to an embodiment of the present invention is shown.

[0033] Figure 9 A perspective view of a terminal of a printed circuit board of a pressure sensor according to an embodiment of the present invention is shown.

[0034] Figure 10 A perspective view of a printed circuit board of a pressure sensor according to another embodiment of the present invention is shown;

[0035] Figure 11 As shown Figure 10 The diagram shows a cross-sectional view along line II of the printed circuit board of a pressure sensor according to another embodiment of the present invention.

[0036] Figure 12 A perspective view of alternative terminals on a printed circuit board of a pressure sensor according to another embodiment of the present invention is shown; and

[0037] Figure 13 A perspective view of alternative terminals of a printed circuit board for a pressure sensor according to another embodiment of the present invention is shown.

[0038] In different accompanying drawings, the same parts are represented by the same reference numerals. The drawings are for illustrative purposes only, and the parts in the drawings are not necessarily drawn to scale. Detailed Implementation

[0039] The following description is merely exemplary in nature and is not intended to limit this disclosure, its application, or its use. This disclosure is readily embodied in many forms. Representative examples of this disclosure are shown in the accompanying drawings and will be described in detail herein; it is to be understood that these embodiments are provided as examples of the principles of the disclosure and not as limitations on the broad aspects of this disclosure. Furthermore, the drawings are generally schematic and not necessarily drawn to scale. Some features may be exaggerated or minimized to show detail of particular components. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but are merely intended to teach those skilled in the art a representative basis for using this disclosure in various ways. For this purpose, elements and limitations described, for example, in the abstract, background, utility model description, description of drawings, and detailed description sections but not expressly set forth in the claims, should not be incorporated, individually or jointly, by implication, inference, or otherwise, into the claims.

[0040] Certain terms may be used for reference only in the following description and are therefore not intended to be limiting. For example, terms such as “above” and “below” refer to orientations in the referenced figures. Terms such as “front,” “rear,” “front,” “rear,” “left,” “right,” “rear,” “side,” “up,” “down,” “top,” and “bottom” describe the orientation and / or position of parts of a component or element within a consistent but arbitrary frame of reference, as will become clear from the text describing the component or element in question and the associated figures.

[0041] Furthermore, terms such as "first," "second," and "third" may be used to describe individual components. These terms are used to describe the accompanying drawings and do not represent a limitation on the scope of this disclosure as defined by the appended claims. Additionally, the teachings may be described herein in the form of functional and / or logical block components and / or various processing steps.

[0042] For the purposes of this detailed description, unless otherwise stated, the singular includes the plural, and vice versa; the words “and” and “or” shall be both conjunctions and adversative conjunctions; the words “any” and “all” shall both mean “any and all”; and the words “including,” “contains,” “has,” etc., shall each mean “including but not limited to.” Furthermore, approximate words such as “about,” “almost,” “basically,” “roughly,” “approximately,” etc., each may be used herein in the meaning of, for example, “within, close to, or almost,” or “within 0% to 5% of,” or “within acceptable manufacturing tolerances,” or any logical combination thereof.

[0043] Figure 1 A perspective view of a pressure sensor according to an embodiment of the present invention is shown. Figure 1As shown, the pressure sensor 1 includes a housing 2 and a can-shaped cover 3 fitted onto the housing 2. A connecting structure 31 is provided on the peripheral side of the can-shaped cover 3, by means of which the pressure sensor 1 is fixed, for example, to a washing machine (not shown). A signal connector (not shown) is also provided on the peripheral side of the can-shaped cover 3 for electrical connection to terminals of a printed circuit board, used to transmit the signal generated by the sensor to the control device (not shown) of the washing machine. A communicating channel 41 is provided at the bottom of the housing 2, through which the liquid to be tested in the washing machine communicates with the interior of the housing 2.

[0044] Figure 2 It shows Figure 1 A cross-sectional view of pressure sensor 1 in the diagram. (See attached image.) Figure 2 As shown, the housing 2 of the pressure sensor 1 consists of an upper first gas cover 5 and a lower second gas cover 4. In the assembled state, a chamber is formed between the first gas cover 5 and the second gas cover 4, and a pressure sensing component 6 is installed within the chamber. The pressure sensing component 6 is arranged between the first gas cover 5 and the second gas cover 4. A closed edge 61 extending along the circumferential direction of the pressure sensing component 6 is provided on its outer periphery. In the installed state, this closed edge 61 seals and isolates the aforementioned chamber from the surrounding environment of the housing 2. Furthermore, this closed edge 61 divides the chamber between the first gas cover 5 and the second gas cover 4 into an upper chamber 21 and a lower chamber 22.

[0045] The first gas cover 5 is generally bowl-shaped, and the bowl-shaped first gas cover 5 has an upwardly extending sleeve 51. The second gas cover 4 is also generally bowl-shaped, and the bottom 42 of the bowl-shaped second gas cover 4 is constructed with a fluid channel 43 that is fluidly connected to the communicating channel 41. The first gas cover 5 and the second gas cover 4 are sealed together by the closed edge 61 of the pressure sensing element 6 located between them.

[0046] The first air cover 5 has an opening (not shown) that allows the upper chamber 21 to communicate with the atmospheric environment. The lower chamber 22 is connected to the washing machine drum (not shown) via a connecting channel 41. When the liquid level in the washing machine drum changes, the air pressure in the lower chamber 22 also changes, and the pressure difference between the upper chamber 21 and the lower chamber 22 causes the pressure sensing component 6 to deform.

[0047] According to an embodiment of the present invention, the pressure sensing component 6 has a carrier 62, a diaphragm 63 disposed around the carrier 62, and a closed edge 61. The carrier 62 has a central disc 66. The diaphragm 63 extends outward from the disc edge 65 of the central disc 66 of the carrier 62, forming an arched portion 64. The pressure sensing component 6 also includes the aforementioned closed edge 61 extending around the diaphragm 63, the closed edge 61 being sandwiched between the first gas cap 5 and the second gas cap 4, thereby sealingly separating the upper chamber 21 and the lower chamber 22. The central disc 66 of the carrier 62 and the closed edge 61 compress the diaphragm 63, causing the diaphragm 63 to arch upward between the disc edge 65 of the carrier 62 and the inner side of the closed edge 61, forming the arched portion 64. In a preferred embodiment, the pressure sensing component 6 is integrally constructed.

[0048] The pressure sensor 1 also includes a magnetic core assembly 7 and a coil 8, which together form a variable inductance sensor. The magnetic core assembly 7 has a core base, a core cap, and a core made of ferromagnetic material. The magnetic core assembly 7 is mounted within the housing 2 and can move relative to the housing 2 as the pressure sensing component 6 deforms. In one embodiment, the coil 8 is coaxially arranged with the housing 2. When the magnetic core assembly 7 moves relative to the housing 2, the core of the magnetic core assembly 7 moves in and out of the space enclosed by the coil 8, causing a change in the inductance of the coil 8. In one embodiment of this application, the coil 8 is wound around the outside of the sleeve 51 of the first air cover 5.

[0049] The magnetic core assembly 7 is supported above the support member 62 of the pressure sensing component 6. As the pressure sensing component 6 deforms, the magnetic core assembly 7 moves relative to the housing 2, forming a variable inductance sensor with the coil 8 wound around the sleeve 51 of the first air cover 5.

[0050] During operation, if the liquid level rises, the air pressure in the lower chamber 22 gradually increases, causing the pressure sensing component 6 to experience upward pressure. This causes the diaphragm 63 to move upward, pulling the magnetic core assembly 7 upward. As the magnetic core assembly 7 rises, the first spring 9 is compressed. As the liquid level drops, the air pressure in the lower chamber 22 decreases, the first spring 9 recovers, and the magnetic core assembly 7 returns to its initial position.

[0051] Figure 3 It shows Figure 2 The image shown is a partially enlarged cross-sectional view of a pressure sensor according to an embodiment of the present invention. Figure 3As shown, the second air cover 4 has a two-step structure, comprising a step 44 near the first air cover 5 and a second step 45 spaced apart from the step 44 and extending radially inward away from the first air cover 5. The upper surface of the step 44 forms an abutment surface 46 for placing the closed edge 61 of the pressure sensing component 6. In a preferred embodiment, a flange 47 is formed at the inner periphery of the step 44, protruding substantially upward along the axial direction A, which, in the installed state, is located below the diaphragm 63 of the pressure sensing component 6. The flange 47 serves to provide support for the diaphragm 63 of the pressure sensing component 6 to prevent the arched portion of the diaphragm 63 from collapsing when the pressure in the lower chamber 22 is too low. In an alternative embodiment, a pressure sensing component 6 with higher rigidity can also be provided, in which the diaphragm 63 of such a high-rigidity pressure sensing component 6 can maintain its arched state in the installed state, thereby eliminating the need for the flange 47 at the inner periphery of the step 44. It is possible to select materials that meet this high stiffness requirement from known materials, such as rubber with sufficient stiffness.

[0052] In a preferred embodiment of the present invention, the longitudinal sections of the abutment surface 46 of the step 44 and the closed edge 61 of the pressure sensing component 6 are formed in a wavy or sawtooth shape that complements each other, thereby achieving a better sealing effect using a labyrinthine structure.

[0053] Figure 4 A perspective view of a portion of a pressure sensor 1 according to an embodiment of the present invention is shown, showing a printed circuit board 10 mounted on a first gas cover 5 of the housing 2 of the pressure sensor 1. Figure 5 A schematic perspective view of the coil 8 of a pressure sensor 1 according to an embodiment of the present invention is shown. The signal output portion of the pressure sensor 1 includes a printed circuit board 10 disposed between the housing 2 and the can-shaped cover 3. The printed circuit board 10 is generally rectangular in shape. Figure 4 As shown, a mounting base 510 is provided on the sleeve 51 of the first gas cover 5. The printed circuit board 10 is mounted on the mounting base 510 of the first gas cover 5. The mounting base 510 is located on the coil 8 wound on the sleeve 51 (in... Figure 4 The top of the sleeve 51 (not shown). Neither the mounting base 510 nor the printed circuit board 10 covers the top of the sleeve 51. The printed circuit board 10 has a first ear 111 and a second ear 112 at opposite ends. The two ends 81 and 82 of the coil 8 are wound around the first ear 111 and the second ear 112 respectively, thereby making the coil 8 electrically connected to the printed circuit board 10.

[0054] like Figure 4As shown, the mounting base 510 has a wall portion 511 extending vertically upward from its horizontal upper surface. In one embodiment of the present invention, the wall portion 511 is a discontinuous wall portion along its length. In another embodiment of the present invention, the mounting base 510 also has a locking mechanism 512 extending vertically upward from its horizontal upper surface and disposed opposite to the wall portion 511. The distance between the wall portion 511 and the locking mechanism 512 is slightly larger than that of the printed circuit board 10 (more specifically, the printed circuit board body 110, such as...). Figure 8 The width (as shown) is designed to help securely receive the printed circuit board 10 in the mounting base 510. In one embodiment of the present invention, the engaging mechanism 512 is provided with a latching portion 513 at its upper end protruding toward the wall portion 511 to help prevent the printed circuit board 10 from leaving the mounting base 510 after it has been mounted onto the mounting base 510.

[0055] Figure 6 A circuit diagram of a printed circuit board 10 for a pressure sensor 1 according to an embodiment of the present invention is shown. The printed circuit board 10 also includes capacitors 121 and 122. In one embodiment of the present invention, capacitors 121 and 122, together with coil 8, form an oscillation circuit (i.e., a variable-frequency oscillator). When the magnetic core assembly 7 moves up and down, affecting the inductance of coil 8, the oscillation circuit can generate a linearly changing frequency signal according to the changing inductance of coil 8.

[0056] During the use of household appliances such as washing machines, as the height of the liquid level (or water level) to be measured changes, i.e., the pressure of the fluid to be measured changes, the diaphragm 63 deforms, and the magnetic core assembly 7 can move up and down, entering and exiting the sleeve 51 of the first air cover 5. Depending on the amount of space that the magnetic core assembly 7 enters outside the sleeve 51 defined by the coil 8, the coil 8 generates a certain amount of inductance. The oscillation circuit then generates a linearly changing frequency signal based on the changing inductance of the coil 8, and transmits the frequency signal to the control system of the household appliance.

[0057] Figure 7 A perspective view of a printed circuit board 10 of a pressure sensor 1 according to an embodiment of the present invention is shown, and the structure of the printed circuit board 10 is shown in more detail. Figure 8 A perspective view of the printed circuit board body 110 of the printed circuit board 10 of the pressure sensor 1 according to an embodiment of the present invention is shown. Figure 9 A perspective view of a terminal 101 of a printed circuit board 10 of a pressure sensor 1 according to an embodiment of the present invention is shown. Figure 10 A perspective view of a printed circuit board 10 of a pressure sensor 1 according to another embodiment of the present invention is shown.

[0058] The printed circuit board 10 includes a printed circuit board body 110, which has a generally rectangular shape that is elongated along its length. For example... Figure 8 As shown, the printed circuit board body 110 includes a first ear portion 111 and a second ear portion 112 located at both ends. The first ear portion 111 and the second ear portion 112 are electrically connected to a first contact 113 and a second contact 113', respectively, wherein the first contact 113 and the second contact 113' are used to electrically connect to a first terminal 101 and a second terminal 102, respectively. A third contact 113' is also provided between the first contact 113 and the second contact 113', and the third contact 113' can be connected to a third terminal 103, which is a ground terminal. In one embodiment of this utility model, the third terminal 103 can be omitted. That is, in one embodiment of this application, the printed circuit board 10 includes a first terminal 101 and a second terminal 102. It will be readily understood by those skilled in the art that more or fewer contacts and corresponding terminals can be provided.

[0059] In one embodiment of the present invention, a first solder joint 114 and a second solder joint 115 extend from the first contact 113 and the third contact 113”, respectively. The first solder joint 114 and the second solder joint 115 are electrically connected to the first contact 113 and the third contact 113”, respectively. The first solder joint 114 and the second solder joint 115 are close to each other but not electrically connected. In one embodiment of the present invention, as... Figure 10 As shown, the first solder joint 114 and the second solder joint 115 are respectively used for surface mounting to the two pins of the surface-mount capacitor 121. In one embodiment of the present invention, between the second contact 113' and the third contact 113", a third solder joint 114' and a fourth solder joint 115' extend from them respectively. The third solder joint 114' and the fourth solder joint 115' are electrically connected to the second contact 113' and the third contact 113" respectively, and the third solder joint 114' and the fourth solder joint 115' are close to each other but not electrically connected. In one embodiment of the present invention, as... Figure 10 As shown, the third solder joint 114' and the fourth solder joint 115' are used for surface mounting to the two pins of the surface-mount capacitor 122, respectively. That is, in Figure 10 In this process, surface mount capacitors 121 and 122 are directly mounted onto the printed circuit board body 100, resulting in a very compact printed circuit board 10, which helps to realize the signal output of the pressure sensor 1.

[0060] In embodiments of this utility model, such as Figure 8As shown, the printed circuit board 10 adopts an elongated structure, which reduces the size of the printed circuit board body 110 from approximately 14.2 mm wide and approximately 35.2 mm long to approximately 3.6 mm wide and approximately 29.8 mm long, greatly reducing the size of the printed circuit board body 110 and thus significantly reducing costs and saving space in the pressure sensor. For example, the size of the printed circuit board body 100 is reduced to approximately 21.5% of its original size. Furthermore, the terminals 101 to 103 can also be significantly reduced in size, for example, from approximately 8.7 mm wide and approximately 19.2 mm long to approximately 2.8 mm wide and approximately 18.39 mm long, with the size of each terminal 101 to 103 reduced to approximately 31% of its original size, thus significantly reducing costs and saving space in the pressure sensor.

[0061] exist Figure 7 In this embodiment, the printed circuit board 10 does not use the method of directly surface-mounting capacitors 121 and 122 to the first solder joint 114, the second solder joint 115, the third solder joint 114', and the fourth solder joint 115', but instead uses the method of inserting and soldering capacitors 121 and 122. That is, in Figure 7 In this embodiment, the first solder joint 114 and the second solder joint 115 are electrically disconnected from each other, and the third solder joint 114' and the fourth solder joint 115' are disconnected from each other. Capacitors 121 and 122 are through-hole capacitors, which can have a lower cost compared to surface-mount capacitors.

[0062] Figure 9 A perspective view of a terminal 101 of a printed circuit board 10 of a pressure sensor 1 according to an embodiment of the present invention is shown. The terminal 101 has a generally "U"-shaped or meandering structure, including a relatively long horizontally extending terminal output portion 1011, a vertical transition portion 1012, a horizontally extending terminal connection portion 1013 located at its maximum height, and a terminal mounting portion 1014 extending vertically downward from one end of the terminal connection portion 1013. It should be understood that, in this application, the "meandering shape" is not limited to... Figure 9 and 12 The shape shown in -13, and other similar shapes that facilitate the connection of the terminal 101 to the printed circuit board body 100, are also included, as long as they achieve the purpose or principle of this invention. Optionally, a through portion 1016 is provided near the free end of the terminal output portion 1011. The through portion 1016 facilitates electrical connection, and also helps reduce costs because it reduces the amount of material used in the terminal 101. In an embodiment of this invention, a through hole 1015 is provided at the terminal connection portion 1013, the through hole 1015 penetrating the terminal connection portion 1013 and extending through a portion of the terminal mounting portion 1014. Figure 7As shown, the pins 1221 of the insert capacitor 122 are disposed in the through-hole 1015 of the first terminal 101. The pins 1221 are inserted from the terminal mounting portion 1014 into the through-hole 1015 and then fixed to the first contact 113 of the printed circuit board body 100 by soldering. That is, the insert capacitor 122 and the first terminal 101 are simultaneously soldered to the first contact 113 of the printed circuit board body 100 in a single soldering process and are electrically connected to each other. Preferably, since the pins 1221 of the insert capacitor 122 extend from the terminal mounting portion 1014 into the through-hole 1015... Figure 7 In the diagram, the positions of the first terminal 101 and pin 1221 are shown in an unsoldered state. After soldering, neither the pin 1221 nor the solder extends beyond the maximum height of the first terminal 101, that is, not exceeding the height of the terminal connection portion 1013, as seen, for example, at the positions of the second terminal 102 and the third terminal 103. This design of the printed circuit board 10 results in a more compact structure, good versatility and adaptability, significantly reduced manufacturing costs, and improved reliability. In an optional embodiment, the terminal mounting portion 1014 is provided with a narrowing portion 1017, which can be received in a complementary lateral protrusion (not shown) of the mounting base 510 during installation, thereby facilitating a more secure fixation of the printed circuit board 10 and the terminal 101 to the housing 2 of the pressure sensor 1. Figure 9 The terminals of the illustrated embodiment can be used as follows: Figure 10 The printed circuit board 10 shown, including surface mount capacitors, can also be used for, for example Figure 7 The printed circuit board 10 shown includes a plug-in capacitor.

[0063] like Figure 8 As shown, the printed circuit board body 100 also includes a groove 116 located on the side, the groove 116 being used to receive the terminal mounting portion 1014 of the terminal 101. Figure 11 A cross-sectional view along line II of the printed circuit board 10 of the pressure sensor 1 according to another embodiment of the present invention is shown. Figure 11 As shown, the "U"-shaped or meandering portion of the terminal 101 engages with the printed circuit board body 100. The horizontal distance between the terminal mounting portion 1014 and the vertical transition portion 1012 of the terminal 101 is slightly greater than the lateral width of the printed circuit board body 100 at the groove 116. This helps to prevent the terminal 101 from moving in the lateral direction relative to the printed circuit board body 100. Furthermore, the groove 116 also prevents the terminal 101 from moving in the longitudinal direction relative to the printed circuit board body 100. This helps to further improve the connection stability and reliability of the printed circuit board 10.

[0064] Figure 12 A perspective view of alternative terminals of the printed circuit board 10 of a pressure sensor 1 according to another embodiment of the present invention is shown. Figure 12 terminals and Figure 9 The terminals 101 shown have substantially the same geometry, that is, a generally "I"-shaped or meandering structure, including a relatively long horizontally extending terminal output portion 1011, a vertical transition portion 1012, a horizontally extending terminal connection portion 1013 located at its maximum height, and a terminal mounting portion 1014 extending vertically downward from one end of the terminal connection portion 1013. Figure 12 In one embodiment, the terminal has a small through hole 1015' at the terminal connection portion 1013, which penetrates only the terminal connection portion 1013 and not any part of the terminal mounting portion 1014, so as to facilitate soldering the terminal 101 to the printed circuit board body 100. Figure 13 A perspective view of alternative terminals of the printed circuit board 10 of a pressure sensor 1 according to another embodiment of the present invention is shown. Figure 12 In one embodiment, the terminal has a narrowed portion 1015” at the terminal connection portion 1013. The narrowed portion 1015” is narrower than the first contact 113 of the printed circuit board body 100, so that it can be soldered to the first contact 113 on both sides of the narrowed portion 1015”, thereby electrically connecting the terminal to the printed circuit board body 100 of the printed circuit board 10. Figure 12 and Figure 13 The alternative terminals of the embodiments are preferably used as such Figure 10 The printed circuit board 10 shown includes surface mount capacitors.

[0065] In an embodiment of this utility model, the printed circuit board body 100 has multiple solder points 114, 115, 114', 115' for surface mount capacitors, and multiple contacts 113, 113', 113" for insert-type capacitors. The contacts 113, 113', 113" can also be used to solder terminals 101, 102, 103. Therefore, the printed circuit board 10 according to this utility model adopts a compatible design, allowing for the selection of either surface mount capacitors or insert-type capacitors as needed. This provides good versatility, reduces the size of the printed circuit board 10, lowers the cost of the pressure sensor 1, improves the assemblability of the pressure sensor 1, and exhibits good compatibility. It is also understood that the printed circuit board body 100 can have the plurality of solder points 114, 115, 114', 115' and the plurality of contacts 113, 113', 113" on the same surface, so that the capacitor and the terminal are electrically connected to the printed circuit board body 100 on the same side. It is also possible that the printed circuit board body 100 can have the plurality of solder points 114, 115, 114', 115' on one surface for surface mounting of the surface mount capacitors 121 and 121, and can have the plurality of contacts 113, 113', 113" on the opposite surface for soldering the terminals 101, 102, 103 on the opposite surface.

[0066] The foregoing description is illustrative in nature and is in no way intended to limit this disclosure, its application, or use. The broad teachings of this disclosure can be implemented in various forms. Therefore, while this disclosure includes specific examples, its true scope should not be so limited, as other modifications will become apparent upon examination of the drawings, description, and appended claims. For example, unless otherwise specifically stated, the size, shape, position, or orientation of various components may be changed as needed and / or desired, provided that such changes do not substantially affect their intended function.

Claims

1. A pressure sensor, characterized in that, The pressure sensor includes: The housing (2) includes a first air cover (5) and a second air cover (4) mounted to each other; Pressure sensing component (6), the pressure sensing component (6) is sandwiched between the first air cover (5) and the second air cover (4), the chamber between the first air cover (5) and the second air cover (4) is divided by the pressure sensing component (6) into an upper chamber (21) and a lower chamber (22). A magnetic core assembly (7) is supported above a pressure sensing component (6), and the magnetic core assembly (7) moves relative to the housing (2) according to the deformation of the pressure sensing component (6); A coil (8) is coaxially arranged with the housing (2), and the inductance of the coil (8) changes when the magnetic core assembly (7) moves relative to the housing (2); and A printed circuit board (10) is mounted on the first gas cover (5). The two ends of the coil (8) are electrically connected to the printed circuit board (10). The printed circuit board (10) outputs a signal according to the inductance change of the coil (8). The printed circuit board (10) has multiple solder points that can be used to mount capacitors and multiple contacts that can be electrically connected to both terminals and capacitors.

2. The pressure sensor according to claim 1, characterized in that, The printed circuit board (10) includes two capacitors and terminals that form part of an oscillation circuit, the terminals being used to output signals.

3. The pressure sensor according to claim 2, characterized in that, The printed circuit board (10) includes a printed circuit board body (100) extending along the length direction. The printed circuit board body (100) includes a first ear (111) and a second ear (112) located at both ends. The first ear (111) and the second ear (112) are electrically connected to the coil (8), respectively.

4. The pressure sensor according to claim 3, characterized in that, The printed circuit board body (100) includes a first contact and a second contact electrically connected to the first ear (111) and the second ear (112) respectively, and a third contact between the first contact and the second contact. The first solder joint and the second solder joint extend from the first contact and the third contact toward each other but are not electrically connected. The third solder joint and the fourth solder joint extend from the second contact and the third contact toward each other but are not electrically connected.

5. The pressure sensor according to claim 4, characterized in that, The first and second solder joints are respectively surface-mount soldered to the two leads of the surface-mount capacitor, and the third and fourth solder joints are respectively surface-mount soldered to the two leads of another surface-mount capacitor.

6. The pressure sensor according to claim 3, characterized in that, Each terminal has a meandering structure, including a relatively long horizontally extending terminal output section (1011), a vertical transition section (1012), a horizontally extending terminal connection section (1013) located at the maximum height, and a terminal mounting section (1014) extending vertically downward from one end of the terminal connection section (1013).

7. The pressure sensor according to claim 6, characterized in that, The printed circuit board body (100) also includes a groove (116) located on the side, the groove (116) being used to receive a terminal mounting portion (1014) of the terminal.

8. The pressure sensor according to claim 7, characterized in that, The horizontal distance between the terminal mounting portion (1014) and the vertical transition portion (1012) of the terminal is greater than the lateral width of the printed circuit board body (100) at the groove (116).

9. The pressure sensor according to claim 6 or 7, characterized in that, A through hole (1015) is provided at the terminal connection portion (1013), the through hole (1015) penetrates the terminal connection portion (1013) and extends through a portion of the terminal mounting portion (1014), the terminal is able to receive the lead (1221) of the capacitor at the through hole (1015) and solder together with the lead to the contact of the printed circuit board body (100).

10. The pressure sensor according to claim 6 or 7, characterized in that, A mounting base (510) for mounting the printed circuit board (10) is provided on the first air cover (5), and the terminal mounting portion (1014) is provided with a narrow portion (1017) that can be received in a lateral protrusion of a complementary shape of the mounting base (510).

11. The pressure sensor according to claim 10, characterized in that, The mounting base (510) includes a wall portion (511) and a locking mechanism (512) that are arranged opposite to each other and extend vertically upward from its upper surface. The distance between the wall portion (511) and the locking mechanism (512) is greater than the width of the printed circuit board body (100).

12. The pressure sensor according to claim 11, characterized in that, The engaging mechanism (512) has a latching part (513) protruding toward the wall (511) at its upper end.

13. The pressure sensor according to claim 3, characterized in that, The printed circuit board (10) includes a first terminal and a second terminal electrically connected to the first ear (111) and the second ear (112), respectively, or The printed circuit board (10) includes a first terminal and a second terminal electrically connected to the first ear (111) and the second ear (112) respectively, and also includes a third terminal located between the first terminal and the second terminal, the third terminal serving as a ground terminal.

14. The pressure sensor according to any one of claims 1 to 5, characterized in that, The plurality of solder joints and the plurality of contacts are disposed on the same surface of the printed circuit board (10); or The plurality of solder joints are disposed on one surface of the printed circuit board (10), and the plurality of contacts are disposed on another surface of the printed circuit board (10) opposite to the surface.

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